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gecko-dev/layout/generic/nsTextFrame.cpp

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/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Robert O'Callahan <roc+moz@cs.cmu.edu>
* Roger B. Sidje <rbs@maths.uq.edu.au>
* Pierre Phaneuf <pp@ludusdesign.com>
* Prabhat Hegde <prabhat.hegde@sun.com>
* Tomi Leppikangas <tomi.leppikangas@oulu.fi>
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
* Daniel Glazman <glazman@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsCRT.h"
#include "nsSplittableFrame.h"
#include "nsLineLayout.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsIPresContext.h"
#include "nsIContent.h"
#include "nsStyleConsts.h"
#include "nsIStyleContext.h"
#include "nsCoord.h"
#include "nsIFontMetrics.h"
#include "nsIRenderingContext.h"
#include "nsIPresShell.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsITimer.h"
#include "prtime.h"
#include "nsVoidArray.h"
#include "prprf.h"
#include "nsIDOMText.h"
#include "nsIDocument.h"
#include "nsIDeviceContext.h"
#include "nsIFocusTracker.h"
#include "nsICaret.h"
#include "nsHTMLAtoms.h"
#include "nsILineBreaker.h"
#include "nsIWordBreaker.h"
#include "nsITextContent.h"
#include "nsTextFragment.h"
#include "nsTextTransformer.h"
#include "nsLayoutAtoms.h"
#include "nsIFrameSelection.h"
#include "nsISelection.h"
#include "nsIDOMRange.h"
#include "nsILookAndFeel.h"
#include "nsCSSRendering.h"
#include "nsILineIterator.h"
#include "nsIPref.h"
#include "nsIServiceManager.h"
#ifdef ACCESSIBILITY
#include "nsIAccessible.h"
#include "nsIAccessibilityService.h"
#endif
#include "nsINameSpaceManager.h"
#include "nsGUIEvent.h"
#ifdef IBMBIDI
#include "nsBidiFrames.h"
#include "nsBidiPresUtils.h"
#include "nsITextFrame.h"
//ahmed
#include "nsBidiUtils.h"
//ahmed end
#endif // IBMBIDI
#ifdef SUNCTL
#include "nsILE.h"
#endif /* SUNCTL */
static NS_DEFINE_CID(kPrefCID, NS_PREF_CID);
#ifdef NS_DEBUG
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#else
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#endif
// #define DEBUGWORDJUMP
#define kSZLIG 0x00DF
//----------------------------------------------------------------------
#define TEXT_BUF_SIZE 100
//----------------------------------------
// checks to see if the text can be lightened..
// text is darkend
inline PRBool CanDarken(nsIPresContext* aPresContext)
{
PRBool darken,haveBackground;
aPresContext->GetBackgroundColorDraw(haveBackground);
if(PR_TRUE == haveBackground){
darken = PR_FALSE;
} else {
aPresContext->GetBackgroundImageDraw(haveBackground);
if(PR_TRUE == haveBackground){
darken = PR_FALSE;
} else {
darken = PR_TRUE;
}
}
return darken;
}
struct nsAutoIndexBuffer {
nsAutoIndexBuffer();
~nsAutoIndexBuffer();
nsresult GrowTo(PRInt32 aAtLeast);
PRInt32* mBuffer;
PRInt32 mBufferLen;
PRInt32 mAutoBuffer[TEXT_BUF_SIZE];
};
nsAutoIndexBuffer::nsAutoIndexBuffer()
: mBuffer(mAutoBuffer),
mBufferLen(TEXT_BUF_SIZE)
{
memset(mAutoBuffer, 0, sizeof(mAutoBuffer));
}
nsAutoIndexBuffer::~nsAutoIndexBuffer()
{
if (mBuffer && (mBuffer != mAutoBuffer)) {
delete [] mBuffer;
}
}
nsresult
nsAutoIndexBuffer::GrowTo(PRInt32 aAtLeast)
{
if (aAtLeast > mBufferLen)
{
PRInt32 newSize = mBufferLen * 2;
if (newSize < mBufferLen + aAtLeast) {
newSize = mBufferLen * 2 + aAtLeast;
}
PRInt32* newBuffer = new PRInt32[newSize];
if (!newBuffer) {
return NS_ERROR_OUT_OF_MEMORY;
}
memset(newBuffer, 0, sizeof(PRInt32) * newSize);
memcpy(newBuffer, mBuffer, sizeof(PRInt32) * mBufferLen);
if (mBuffer != mAutoBuffer) {
delete [] mBuffer;
}
mBuffer = newBuffer;
mBufferLen = newSize;
}
return NS_OK;
}
//----------------------------------------------------------------------
// Helper class for managing blinking text
class nsBlinkTimer : public nsITimerCallback
{
public:
nsBlinkTimer();
virtual ~nsBlinkTimer();
NS_DECL_ISUPPORTS
void AddFrame(nsIPresContext* aPresContext, nsIFrame* aFrame);
PRBool RemoveFrame(nsIFrame* aFrame);
PRInt32 FrameCount();
void Start();
void Stop();
NS_DECL_NSITIMERCALLBACK
static nsresult AddBlinkFrame(nsIPresContext* aPresContext, nsIFrame* aFrame);
static nsresult RemoveBlinkFrame(nsIFrame* aFrame);
static PRBool GetBlinkIsOff() { return sBlinkTextOff; }
protected:
struct FrameData {
nsIPresContext* mPresContext; // pres context associated with the frame
nsIFrame* mFrame;
FrameData(nsIPresContext* aPresContext,
nsIFrame* aFrame)
: mPresContext(aPresContext), mFrame(aFrame) {}
};
nsCOMPtr<nsITimer> mTimer;
nsVoidArray mFrames;
nsIPresContext* mPresContext;
protected:
static nsBlinkTimer* sTextBlinker;
static PRBool sBlinkTextOff;
};
nsBlinkTimer* nsBlinkTimer::sTextBlinker = nsnull;
PRBool nsBlinkTimer::sBlinkTextOff = PR_FALSE;
#ifdef NOISY_BLINK
static PRTime gLastTick;
#endif
nsBlinkTimer::nsBlinkTimer()
{
NS_INIT_ISUPPORTS();
}
nsBlinkTimer::~nsBlinkTimer()
{
Stop();
sTextBlinker = nsnull;
}
void nsBlinkTimer::Start()
{
nsresult rv;
mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_OK == rv) {
mTimer->InitWithCallback(this, 750, nsITimer::TYPE_REPEATING_PRECISE);
}
}
void nsBlinkTimer::Stop()
{
if (nsnull != mTimer) {
mTimer->Cancel();
}
}
NS_IMPL_ISUPPORTS1(nsBlinkTimer, nsITimerCallback)
void nsBlinkTimer::AddFrame(nsIPresContext* aPresContext, nsIFrame* aFrame) {
FrameData* frameData = new FrameData(aPresContext, aFrame);
mFrames.AppendElement(frameData);
if (1 == mFrames.Count()) {
Start();
}
}
PRBool nsBlinkTimer::RemoveFrame(nsIFrame* aFrame) {
PRInt32 i, n = mFrames.Count();
PRBool rv = PR_FALSE;
for (i = 0; i < n; i++) {
FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
if (frameData->mFrame == aFrame) {
rv = mFrames.RemoveElementAt(i);
delete frameData;
break;
}
}
if (0 == mFrames.Count()) {
Stop();
}
return rv;
}
PRInt32 nsBlinkTimer::FrameCount() {
return mFrames.Count();
}
NS_IMETHODIMP nsBlinkTimer::Notify(nsITimer *timer)
{
// Toggle blink state bit so that text code knows whether or not to
// render. All text code shares the same flag so that they all blink
// in unison.
sBlinkTextOff = PRBool(!sBlinkTextOff);
#ifndef REPEATING_TIMERS
// XXX hack to get auto-repeating timers; restart before doing
// expensive work so that time between ticks is more even
Stop();
Start();
#endif
#ifdef NOISY_BLINK
PRTime now = PR_Now();
char buf[50];
PRTime delta;
LL_SUB(delta, now, gLastTick);
gLastTick = now;
PR_snprintf(buf, sizeof(buf), "%lldusec", delta);
printf("%s\n", buf);
#endif
PRInt32 i, n = mFrames.Count();
for (i = 0; i < n; i++) {
FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
// Determine damaged area and tell view manager to redraw it
nsPoint offset;
nsRect bounds;
frameData->mFrame->GetRect(bounds);
nsIView* view;
frameData->mFrame->GetOffsetFromView(frameData->mPresContext, offset, &view);
nsIViewManager* vm;
view->GetViewManager(vm);
bounds.x = offset.x;
bounds.y = offset.y;
vm->UpdateView(view, bounds, 0);
NS_RELEASE(vm);
}
return NS_OK;
}
// static
nsresult nsBlinkTimer::AddBlinkFrame(nsIPresContext* aPresContext, nsIFrame* aFrame)
{
if (!sTextBlinker)
{
sTextBlinker = new nsBlinkTimer;
if (!sTextBlinker) return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(sTextBlinker);
sTextBlinker->AddFrame(aPresContext, aFrame);
return NS_OK;
}
// static
nsresult nsBlinkTimer::RemoveBlinkFrame(nsIFrame* aFrame)
{
NS_ASSERTION(sTextBlinker, "Should have blink timer here");
nsBlinkTimer* blinkTimer = sTextBlinker; // copy so we can call NS_RELEASE on it
if (!blinkTimer) return NS_OK;
blinkTimer->RemoveFrame(aFrame);
NS_RELEASE(blinkTimer);
return NS_OK;
}
//----------------------------------------------------------------------
#ifdef IBMBIDI
class nsTextFrame : public nsFrame, public nsITextFrame {
#else
class nsTextFrame : public nsFrame {
#endif
public:
nsTextFrame();
// nsIFrame
NS_IMETHOD QueryInterface(const nsIID& aIID,
void** aInstancePtrResult);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags);
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
NS_IMETHOD GetCursor(nsIPresContext* aPresContext,
nsPoint& aPoint,
PRInt32& aCursor);
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent);
NS_IMETHOD GetNextInFlow(nsIFrame** aNextInFlow) const {
*aNextInFlow = mNextInFlow;
return NS_OK;
}
NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) {
mNextInFlow = aNextInFlow;
return NS_OK;
}
NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const {
aIsSplittable = NS_FRAME_SPLITTABLE;
return NS_OK;
}
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::textFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
#ifdef DEBUG
NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
NS_IMETHOD GetPosition(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
NS_IMETHOD GetPositionSlowly(nsIPresContext* aCX,
nsIRenderingContext * aRendContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aOffset);
NS_IMETHOD SetSelected(nsIPresContext* aPresContext,
nsIDOMRange *aRange,
PRBool aSelected,
nsSpread aSpread);
NS_IMETHOD PeekOffset(nsIPresContext* aPresContext, nsPeekOffsetStruct *aPos);
NS_IMETHOD CheckVisibility(nsIPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
NS_IMETHOD HandleMultiplePress(nsIPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
NS_IMETHOD GetPointFromOffset(nsIPresContext* inPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame* *outChildFrame);
NS_IMETHOD IsVisibleForPainting(nsIPresContext * aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aCheckVis,
PRBool* aIsVisible);
NS_IMETHOD IsEmpty(nsCompatibility aCompatMode,
PRBool aIsPre,
PRBool* aResult);
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
// nsIHTMLReflow
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
NS_IMETHOD TrimTrailingWhiteSpace(nsIPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth);
struct TextStyle {
const nsStyleFont* mFont;
const nsStyleText* mText;
const nsStyleColor* mColor;
const nsStyleVisibility* mVisibility;
nsIFontMetrics* mNormalFont;
nsIFontMetrics* mSmallFont;
nsIFontMetrics* mLastFont;
PRBool mSmallCaps;
nscoord mWordSpacing;
nscoord mLetterSpacing;
nscolor mSelectionTextColor;
nscolor mSelectionBGColor;
nscoord mSpaceWidth;
nscoord mAveCharWidth;
PRBool mJustifying;
PRBool mPreformatted;
PRInt32 mNumSpacesToRender;
PRInt32 mNumSpacesToMeasure;
nscoord mExtraSpacePerSpace;
PRInt32 mNumSpacesReceivingExtraJot;
TextStyle(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* sc)
{
mFont = nsnull;
mText = nsnull;
mColor = nsnull;
mNormalFont = nsnull;
mSmallFont = nsnull;
mLastFont = nsnull;
// Get style data
mColor = (const nsStyleColor*) sc->GetStyleData(eStyleStruct_Color);
mFont = (const nsStyleFont*) sc->GetStyleData(eStyleStruct_Font);
mText = (const nsStyleText*) sc->GetStyleData(eStyleStruct_Text);
mVisibility = (const nsStyleVisibility*) sc->GetStyleData(eStyleStruct_Visibility);
// Cache the original decorations and reuse the current font
// to query metrics, rather than creating a new font which is expensive.
nsFont* plainFont = (nsFont *)&mFont->mFont; //XXX: Change to use a CONST_CAST macro.
NS_ASSERTION(plainFont, "null plainFont: font problems in TextStyle::TextStyle");
PRUint8 originalDecorations = plainFont->decorations;
plainFont->decorations = NS_FONT_DECORATION_NONE;
mAveCharWidth = 0;
SetFontFromStyle(&aRenderingContext, sc); // some users of the struct expect this state
aRenderingContext.GetFontMetrics(mNormalFont);
mNormalFont->GetSpaceWidth(mSpaceWidth);
mNormalFont->GetAveCharWidth(mAveCharWidth);
mLastFont = mNormalFont;
// Get the small-caps font if needed
mSmallCaps = NS_STYLE_FONT_VARIANT_SMALL_CAPS == plainFont->variant;
if (mSmallCaps) {
nscoord originalSize = plainFont->size;
plainFont->size = nscoord(0.8 * plainFont->size);
aPresContext->GetMetricsFor(*plainFont, &mSmallFont);
// Reset to the size value saved earlier.
plainFont->size = originalSize;
}
else {
mSmallFont = nsnull;
}
// Reset to the decoration saved earlier
plainFont->decorations = originalDecorations;
// Get colors from look&feel
mSelectionBGColor = NS_RGB(0, 0, 0);
mSelectionTextColor = NS_RGB(255, 255, 255);
nsILookAndFeel* look = nsnull;
if (NS_SUCCEEDED(aPresContext->GetLookAndFeel(&look)) && look) {
look->GetColor(nsILookAndFeel::eColor_TextSelectBackground, mSelectionBGColor);
look->GetColor(nsILookAndFeel::eColor_TextSelectForeground, mSelectionTextColor);
NS_RELEASE(look);
}
// Get the word and letter spacing
mWordSpacing = 0;
PRIntn unit = mText->mWordSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mWordSpacing = mText->mWordSpacing.GetCoordValue();
}
mLetterSpacing = 0;
unit = mText->mLetterSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mLetterSpacing = mText->mLetterSpacing.GetCoordValue();
}
mNumSpacesToRender = 0;
mNumSpacesToMeasure = 0;
mNumSpacesReceivingExtraJot = 0;
mExtraSpacePerSpace = 0;
mPreformatted = (NS_STYLE_WHITESPACE_PRE == mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == mText->mWhiteSpace);
mJustifying = (NS_STYLE_TEXT_ALIGN_JUSTIFY == mText->mTextAlign) &&
!mPreformatted;
}
~TextStyle() {
NS_IF_RELEASE(mNormalFont);
NS_IF_RELEASE(mSmallFont);
mFont = nsnull;
mText = nsnull;
mColor = nsnull;
mNormalFont = nsnull;
mSmallFont = nsnull;
mLastFont = nsnull;
}
};
struct TextReflowData {
PRInt32 mX; // OUT
PRInt32 mOffset; // IN/OUT How far along we are in the content
nscoord mMaxWordWidth; // OUT
nscoord mAscent; // OUT
nscoord mDescent; // OUT
PRPackedBool mWrapping; // IN
PRPackedBool mSkipWhitespace; // IN
PRPackedBool mMeasureText; // IN
PRPackedBool mInWord; // IN
PRPackedBool mFirstLetterOK; // IN
PRPackedBool mCanBreakBefore; // IN
PRPackedBool mComputeMaxWordWidth; // IN
PRPackedBool mTrailingSpaceTrimmed; // IN/OUT
TextReflowData(PRInt32 aStartingOffset,
PRBool aWrapping,
PRBool aSkipWhitespace,
PRBool aMeasureText,
PRBool aInWord,
PRBool aFirstLetterOK,
PRBool aCanBreakBefore,
PRBool aComputeMaxWordWidth,
PRBool aTrailingSpaceTrimmed)
: mX(0),
mOffset(aStartingOffset),
mMaxWordWidth(0),
mAscent(0),
mDescent(0),
mWrapping(aWrapping),
mSkipWhitespace(aSkipWhitespace),
mMeasureText(aMeasureText),
mInWord(aInWord),
mFirstLetterOK(aFirstLetterOK),
mCanBreakBefore(aCanBreakBefore),
mComputeMaxWordWidth(aComputeMaxWordWidth),
mTrailingSpaceTrimmed(aTrailingSpaceTrimmed)
{}
};
nsIDocument* GetDocument(nsIPresContext* aPresContext);
PRIntn PrepareUnicodeText(nsTextTransformer& aTransformer,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen);
void ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRInt32 aNumSpaces);
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRUnichar* aText = nsnull,
SelectionDetails *aDetails = nsnull,
PRUint32 aIndex = 0,
PRUint32 aLength = 0,
const nscoord* aSpacing = nsnull);
void PaintTextSlowly(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord aX, nscoord aY);
void RenderString(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aX, nscoord aY,
nscoord aWidth,
SelectionDetails *aDetails = nsnull);
void MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
nsTextDimensions* aDimensionsResult);
PRUint32 EstimateNumChars(PRUint32 aAvailableWidth,
PRUint32 aAverageCharWidth);
nsReflowStatus MeasureText(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsTextTransformer& aTx,
nsILineBreaker* aLb,
TextStyle& aTs,
TextReflowData& aTextData);
void GetTextDimensions(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nsTextDimensions* aDimensionsResult);
//this returns the index into the PAINTBUFFER of the x coord aWidth(based on 0 as far left)
//also note: this is NOT added to mContentOffset since that would imply that this return is
//meaningful to content yet. use index buffer from prepareunicodestring to find the content offset.
PRInt32 GetLengthSlowly(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aWidth);
PRBool IsTextInSelection(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext);
nsresult GetTextInfoForPainting(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIPresShell** aPresShell,
nsISelectionController** aSelectionController,
PRBool& aDisplayingSelection,
PRBool& aIsPaginated,
PRBool& aIsSelected,
PRInt16& aSelectionValue,
nsILineBreaker** aLineBreaker);
void PaintUnicodeText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord dx, nscoord dy);
void PaintAsciiText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord dx, nscoord dy);
nsTextDimensions ComputeTotalWordDimensions(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
const nsTextDimensions& aBaseDimensions,
PRUnichar* aWordBuf,
PRUint32 aWordBufLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore);
nsTextDimensions ComputeWordFragmentDimensions(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRBool* aStop,
const PRUnichar* aWordBuf,
PRUint32 &aWordBufLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore);
void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const;
#ifdef IBMBIDI
// nsITextFrame methods here
NS_IMETHOD SetOffsets(PRInt32 aStart, PRInt32 aEnd);
#endif
protected:
virtual ~nsTextFrame();
nsIFrame* mNextInFlow;
PRInt32 mContentOffset;
PRInt32 mContentLength;
PRInt32 mColumn;
nscoord mAscent;
//factored out method for GetTextDimensions and getlengthslowly. if aGetTextDimensions is non-zero number then measure to the width field and return the length. else shove total dimensions into result
PRInt32 GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nsTextDimensions* aDimensionsResult,
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult->width size*/);
nsresult GetContentAndOffsetsForSelection(nsIPresContext* aPresContext,nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength);
// prefs used to configure the double-click word selection behavior
static PRPackedBool sWordSelectPrefInited; // have we read the prefs yet?
static PRPackedBool sWordSelectEatSpaceAfter; // should we include whitespace up to next word?
#ifdef IBMBIDI
void AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
PRInt32 textLength,
PRBool isRTLChars,
PRBool isOddLevel,
PRBool isBidiSystem);
private:
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
#endif
};
#ifdef ACCESSIBILITY
NS_IMETHODIMP nsTextFrame::GetAccessible(nsIAccessible** aAccessible)
{
if (mRect.width > 0 || mRect.height > 0) {
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
return accService->CreateHTMLTextAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
}
}
return NS_ERROR_FAILURE;
}
#endif
PRPackedBool nsTextFrame::sWordSelectPrefInited = PR_FALSE;
PRPackedBool nsTextFrame::sWordSelectEatSpaceAfter = PR_TRUE;
//-----------------------------------------------------------------------------
NS_IMETHODIMP nsTextFrame::QueryInterface(const nsIID& aIID,
void** aInstancePtrResult)
{
NS_PRECONDITION(aInstancePtrResult, "null pointer");
if (!aInstancePtrResult)
return NS_ERROR_NULL_POINTER;
#ifdef IBMBIDI
if (aIID.Equals(NS_GET_IID(nsITextFrame))) {
*aInstancePtrResult = NS_STATIC_CAST(nsITextFrame*, this);
return NS_OK;
}
#endif
return nsFrame::QueryInterface(aIID, aInstancePtrResult);
}
NS_IMETHODIMP
nsTextFrame::Destroy(nsIPresContext* aPresContext)
{
if (mNextInFlow) {
mNextInFlow->SetPrevInFlow(nsnull);
}
// Let the base class destroy the frame
return nsFrame::Destroy(aPresContext);
}
class nsContinuingTextFrame : public nsTextFrame {
public:
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
NS_IMETHOD GetPrevInFlow(nsIFrame** aPrevInFlow) const {
*aPrevInFlow = mPrevInFlow;
return NS_OK;
}
NS_IMETHOD SetPrevInFlow(nsIFrame* aPrevInFlow) {
mPrevInFlow = aPrevInFlow;
return NS_OK;
}
#ifdef DEBUG
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
protected:
nsIFrame* mPrevInFlow;
};
NS_IMETHODIMP
nsContinuingTextFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv;
rv = nsTextFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
if (aPrevInFlow) {
// Hook the frame into the flow
mPrevInFlow = aPrevInFlow;
aPrevInFlow->SetNextInFlow(this);
#ifdef IBMBIDI
nsFrameState state;
aPrevInFlow->GetFrameState(&state);
if (state & NS_FRAME_IS_BIDI) {
PRInt32 start, end;
aPrevInFlow->GetOffsets(start, mContentOffset);
void* value;
aPrevInFlow->GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, &value,sizeof(value));
SetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, value);
aPrevInFlow->GetBidiProperty(aPresContext, nsLayoutAtoms::baseLevel, &value,sizeof(value));
SetBidiProperty(aPresContext, nsLayoutAtoms::baseLevel, value);
aPrevInFlow->GetBidiProperty(aPresContext, nsLayoutAtoms::charType, &value,sizeof(value));
SetBidiProperty(aPresContext, nsLayoutAtoms::charType, value);
aPrevInFlow->GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, &value,sizeof(value));
if (value) { // nextBidi
// aPrevInFlow and this frame will point to the same next bidi frame.
SetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, value);
( (nsIFrame*) value)->GetOffsets(start, end);
mContentLength = PR_MAX(1, start - mContentOffset);
} // value
mState |= NS_FRAME_IS_BIDI;
} // prev frame is bidi
#endif // IBMBIDI
}
return rv;
}
NS_IMETHODIMP
nsContinuingTextFrame::Destroy(nsIPresContext* aPresContext)
{
if (mPrevInFlow || mNextInFlow) {
nsSplittableFrame::RemoveFromFlow(this);
}
// Let the base class destroy the frame
return nsFrame::Destroy(aPresContext);
}
#ifdef DEBUG
NS_IMETHODIMP
nsContinuingTextFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = sizeof(*this);
return NS_OK;
}
#endif
inline nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB)
{
if (colorA == colorB)
{
nscolor res;
res = NS_RGB(NS_GET_R(colorA) ^ 0xff,
NS_GET_G(colorA) ^ 0xff,
NS_GET_B(colorA) ^ 0xff);
return res;
}
return colorA;
}
//DRAW SELECTION ITERATOR USED FOR TEXTFRAMES ONLY
//helper class for drawing multiply selected text
class DrawSelectionIterator
{
enum {SELECTION_TYPES_WE_CARE_ABOUT=nsISelectionController::SELECTION_NONE+nsISelectionController::SELECTION_NORMAL};
public:
DrawSelectionIterator(nsIContent *aContent, const SelectionDetails *aSelDetails, PRUnichar *aText,
PRUint32 aTextLength, nsTextFrame::TextStyle &aTextStyle,
PRInt16 aSelectionStatus, nsIPresContext *aPresContext,
nsIStyleContext *aStyleContext);
~DrawSelectionIterator();
PRBool First();
PRBool Next();
PRBool IsDone();
PRUnichar * CurrentTextUnicharPtr();
char * CurrentTextCStrPtr();
PRUint32 CurrentLength();
nsTextFrame::TextStyle & CurrentStyle();
nscolor CurrentForeGroundColor();
PRBool CurrentBackGroundColor(nscolor &aColor, PRBool *aIsTransparent);
PRBool IsBeforeOrAfter();
private:
union {
PRUnichar *mUniStr;
char *mCStr;
};
PRUint32 mLength;
PRUint32 mCurrentIdx;
PRUint32 mCurrentLength;
nsTextFrame::TextStyle &mOldStyle;//base new styles on this one???
const SelectionDetails *mDetails;
PRBool mDone;
PRUint8 * mTypes;
PRBool mInit;
PRInt16 mSelectionStatus;//see nsIDocument.h SetDisplaySelection()
nscolor mDisabledColor;
nscolor mAttentionColor;
PRBool mSelectionPseudoStyle;
nscolor mSelectionPseudoFGcolor;
nscolor mSelectionPseudoBGcolor;
PRBool mSelectionPseudoBGIsTransparent;
//private methods
void FillCurrentData();
};
DrawSelectionIterator::DrawSelectionIterator(nsIContent *aContent,
const SelectionDetails *aSelDetails,
PRUnichar *aText,
PRUint32 aTextLength,
nsTextFrame::TextStyle &aTextStyle,
PRInt16 aSelectionStatus,
nsIPresContext *aPresContext,
nsIStyleContext *aStyleContext)
:mOldStyle(aTextStyle)
{
mDetails = aSelDetails;
mCurrentIdx = 0;
mUniStr = aText;
mLength = aTextLength;
mTypes = nsnull;
mInit = PR_FALSE;
mSelectionStatus = aSelectionStatus;
mSelectionPseudoStyle = PR_FALSE;
mSelectionPseudoBGIsTransparent = PR_FALSE;
if (aContent) {
nsIStyleContext *sc = nsnull;
nsCOMPtr<nsIContent> parentContent;
aContent->GetParent(*getter_AddRefs(parentContent));
aPresContext->ProbePseudoStyleContextFor(parentContent,
nsHTMLAtoms::mozSelectionPseudo,
aStyleContext, &sc);
if (nsnull != sc) {
mSelectionPseudoStyle = PR_TRUE;
const nsStyleBackground* bg = (const nsStyleBackground*)sc->GetStyleData(eStyleStruct_Background);
mSelectionPseudoBGIsTransparent = PRBool(bg->mBackgroundFlags & NS_STYLE_BG_COLOR_TRANSPARENT);
if (!mSelectionPseudoBGIsTransparent )
mSelectionPseudoBGcolor = bg->mBackgroundColor;
const nsStyleColor* color =(const nsStyleColor*) sc->GetStyleData(eStyleStruct_Color);
mSelectionPseudoFGcolor = color->mColor;
NS_RELEASE(sc);
}
}
// Get background colors for disabled selection at attention-getting selection (used with type ahead find)
nsCOMPtr<nsILookAndFeel> look;
if (NS_SUCCEEDED(aPresContext->GetLookAndFeel(getter_AddRefs(look))) && look) {
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundAttention, mAttentionColor);
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundDisabled, mDisabledColor);
mDisabledColor = EnsureDifferentColors(mDisabledColor, mOldStyle.mSelectionBGColor);
mAttentionColor = EnsureDifferentColors(mAttentionColor, mOldStyle.mSelectionBGColor);
}
else
mDisabledColor = mAttentionColor = mOldStyle.mSelectionBGColor;
if (!aSelDetails)
{
mDone = PR_TRUE;
return;
}
mDone = (PRBool)(mCurrentIdx>=mLength);
if (mDone)
return;
//special case for 1 selection. later
const SelectionDetails *details = aSelDetails;
if (details->mNext)
{
mTypes = new PRUint8[mLength];
if (!mTypes)
return;
memset(mTypes,0,mLength);//initialize to 0
while (details)
{
if ((details->mType & SELECTION_TYPES_WE_CARE_ABOUT ) &&
(details->mStart != details->mEnd))
{
mInit = PR_TRUE;//WE FOUND SOMETHING WE CARE ABOUT
for (int i = details->mStart; i < details->mEnd; i++)
{
if ((PRUint32)i>=mLength)
{
NS_ASSERTION(0,"Selection Details out of range?");
return;//eh
}
mTypes[i]|=details->mType;//add this bit
}
}
details= details->mNext;
}
if (!mInit && mTypes) //we have details but none that we care about.
{
delete mTypes;
mTypes = nsnull;
mDone = PR_TRUE;//we are finished
}
}
else if (details->mStart == details->mEnd)//no collapsed selections here!
{
mDone = PR_TRUE;
return;
}
else if (!(details->mType & SELECTION_TYPES_WE_CARE_ABOUT ))//if all we have is selection we DONT care about, do nothing
{
mDone = PR_TRUE;
return;
}
mInit = PR_TRUE;
}
DrawSelectionIterator::~DrawSelectionIterator()
{
if (mTypes)
delete mTypes;
}
void
DrawSelectionIterator::FillCurrentData()
{
if (mDone)
return;
if (!mTypes)
{
mCurrentIdx+=mCurrentLength;
if (mCurrentIdx >= mLength)
{
mDone = PR_TRUE;
return;
}
if (mCurrentIdx < (PRUint32)mDetails->mStart)
{
mCurrentLength = mDetails->mStart;
}
else if (mCurrentIdx == (PRUint32)mDetails->mStart)
{//start
mCurrentLength = mDetails->mEnd-mCurrentIdx;
}
else if (mCurrentIdx > (PRUint32)mDetails->mStart)//last unselected part
{
mCurrentLength = mLength - mDetails->mEnd;
}
}
else
{
mCurrentIdx+=mCurrentLength;//advance to this chunk
if (mCurrentIdx >= mLength)
{
mDone = PR_TRUE;
return;
}
uint8 typevalue = mTypes[mCurrentIdx];
while (typevalue == mTypes[mCurrentIdx+mCurrentLength] && (mCurrentIdx+mCurrentLength) <mLength)
{
mCurrentLength++;
}
}
}
PRBool
DrawSelectionIterator::First()
{
if (!mInit)
return PR_FALSE;
mCurrentIdx = 0;
mCurrentLength = 0;
if (!mTypes && mDetails->mStart == mDetails->mEnd)//no collapsed selections here!
mDone = PR_TRUE;
mDone = (mCurrentIdx+mCurrentLength) >= mLength;
FillCurrentData();
return PR_TRUE;
}
PRBool
DrawSelectionIterator::Next()
{
if (mDone || !mInit)
return PR_FALSE;
FillCurrentData();//advances to next chunk
return PR_TRUE;
}
PRBool
DrawSelectionIterator::IsDone()
{
return mDone || !mInit;
}
PRUnichar *
DrawSelectionIterator::CurrentTextUnicharPtr()
{
return mUniStr+mCurrentIdx;
}
char *
DrawSelectionIterator::CurrentTextCStrPtr()
{
return mCStr+mCurrentIdx;
}
PRUint32
DrawSelectionIterator::CurrentLength()
{
return mCurrentLength;
}
nsTextFrame::TextStyle &
DrawSelectionIterator::CurrentStyle()
{
return mOldStyle;
}
nscolor
DrawSelectionIterator::CurrentForeGroundColor()
{
nscolor foreColor;
PRBool colorSet = PR_FALSE;
if (!mTypes)
{
if (mCurrentIdx == (PRUint32)mDetails->mStart)
{
foreColor = mOldStyle.mSelectionTextColor;
colorSet = PR_TRUE;
}
}
else if (mTypes[mCurrentIdx] | nsISelectionController::SELECTION_NORMAL)//Find color based on mTypes[mCurrentIdx];
{
foreColor = mOldStyle.mSelectionTextColor;
colorSet = PR_TRUE;
}
if (colorSet && (foreColor != NS_DONT_CHANGE_COLOR)) {
if (mSelectionPseudoStyle)
return mSelectionPseudoFGcolor;
else
return foreColor;
}
return mOldStyle.mColor->mColor;
}
PRBool
DrawSelectionIterator::CurrentBackGroundColor(nscolor &aColor, PRBool *aIsTransparent)
{
//Find color based on mTypes[mCurrentIdx];
*aIsTransparent = PR_FALSE;
if (mTypes? (mTypes[mCurrentIdx] | nsISelectionController::SELECTION_NORMAL): (mCurrentIdx == (PRUint32)mDetails->mStart)) {
aColor = mOldStyle.mSelectionBGColor;
if (mSelectionPseudoStyle) {
aColor = mSelectionPseudoBGcolor;
*aIsTransparent = mSelectionPseudoBGIsTransparent;
}
if (mSelectionStatus==nsISelectionController::SELECTION_ATTENTION)
aColor = mAttentionColor;
else if (mSelectionStatus != nsISelectionController::SELECTION_ON)
aColor = mDisabledColor;
return PR_TRUE;
}
return PR_FALSE;
}
PRBool
DrawSelectionIterator::IsBeforeOrAfter()
{
return mCurrentIdx != (PRUint32)mDetails->mStart;
}
//END DRAWSELECTIONITERATOR!!
// Flag information used by rendering code. This information is
// computed by the ResizeReflow code. The flags are stored in the
// mState variable in the frame class private section.
// Flag indicating that whitespace was skipped
#define TEXT_SKIP_LEADING_WS 0x01000000
#define TEXT_HAS_MULTIBYTE 0x02000000
#define TEXT_IN_WORD 0x04000000
// This bit is set on the first frame in a continuation indicating
// that it was chopped short because of :first-letter style.
#define TEXT_FIRST_LETTER 0x08000000
#define TEXT_WAS_TRANSFORMED 0x10000000
// Bits in mState used for reflow flags
#define TEXT_REFLOW_FLAGS 0x1F000000
#define TEXT_TRIMMED_WS 0x20000000
#define TEXT_OPTIMIZE_RESIZE 0x40000000
#define TEXT_BLINK_ON 0x80000000
//----------------------------------------------------------------------
nsresult
NS_NewTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTextFrame* it = new (aPresShell) nsTextFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsresult
NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsContinuingTextFrame* it = new (aPresShell) nsContinuingTextFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsTextFrame::nsTextFrame()
{
// read in our global word selection prefs
if ( !sWordSelectPrefInited ) {
nsCOMPtr<nsIPref> prefService ( do_GetService(NS_PREF_CONTRACTID) );
if ( prefService ) {
PRBool temp = PR_FALSE;
prefService->GetBoolPref("layout.word_select.eat_space_to_next_word", &temp);
sWordSelectEatSpaceAfter = temp;
}
sWordSelectPrefInited = PR_TRUE;
}
}
nsTextFrame::~nsTextFrame()
{
if (0 != (mState & TEXT_BLINK_ON))
{
nsBlinkTimer::RemoveBlinkFrame(this);
}
}
#ifdef IBMBIDI
NS_IMETHODIMP_(nsrefcnt) nsTextFrame::AddRef(void)
{
NS_WARNING("not supported for frames");
return 1;
}
NS_IMETHODIMP_(nsrefcnt) nsTextFrame::Release(void)
{
NS_WARNING("not supported for frames");
return 1;
}
#endif // IBMBIDI
nsIDocument*
nsTextFrame::GetDocument(nsIPresContext* aPresContext)
{
nsIDocument* result = nsnull;
if (mContent) {
mContent->GetDocument(result);
}
if (!result && aPresContext) {
nsIPresShell* shell;
aPresContext->GetShell(&shell);
if (shell) {
shell->GetDocument(&result);
NS_RELEASE(shell);
}
}
return result;
}
NS_IMETHODIMP
nsTextFrame::GetCursor(nsIPresContext* aPresContext,
nsPoint& aPoint,
PRInt32& aCursor)
{
const nsStyleUserInterface* ui = (const nsStyleUserInterface*)
mStyleContext->GetStyleData(eStyleStruct_UserInterface);
aCursor = ui->mCursor;
if (NS_STYLE_CURSOR_AUTO == aCursor) {
aCursor = NS_STYLE_CURSOR_TEXT;
}
return NS_OK;
}
static nsIFrame*
GetLastInFlow(nsIFrame* aFrame)
{
nsIFrame* lastInFlow;
nsIFrame* nextInFlow = aFrame;
while (nsnull!=nextInFlow) {
lastInFlow = nextInFlow;
lastInFlow->GetNextInFlow(&nextInFlow);
}
NS_POSTCONDITION(nsnull!=lastInFlow, "illegal state in flow chain.");
return lastInFlow;
}
NS_IMETHODIMP
nsTextFrame::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent)
{
nsIFrame* targetTextFrame = this;
PRBool markAllDirty = PR_TRUE;
if (aSubContent) {
nsCOMPtr<nsITextContentChangeData> tccd = do_QueryInterface(aSubContent);
if (tccd) {
nsITextContentChangeData::ChangeType type;
tccd->GetChangeType(&type);
if (nsITextContentChangeData::Append == type) {
markAllDirty = PR_FALSE;
nsTextFrame* frame = (nsTextFrame*)::GetLastInFlow(this);
frame->mState |= NS_FRAME_IS_DIRTY;
targetTextFrame = frame;
}
}
}
if (markAllDirty) {
// Mark this frame and all the next-in-flow frames as dirty
nsTextFrame* textFrame = this;
while (textFrame) {
textFrame->mState |= NS_FRAME_IS_DIRTY;
#ifdef IBMBIDI
nsIFrame* nextBidi;
textFrame->GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, (void**) &nextBidi,sizeof(nextBidi));
if (nextBidi)
textFrame = (nsTextFrame*)nextBidi;
else
#endif
textFrame = (nsTextFrame*)textFrame->mNextInFlow;
}
}
// Ask the parent frame to reflow me.
nsresult rv;
nsCOMPtr<nsIPresShell> shell;
rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell && mParent) {
mParent->ReflowDirtyChild(shell, targetTextFrame);
}
return rv;
}
NS_IMETHODIMP
nsTextFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
if (NS_FRAME_PAINT_LAYER_FOREGROUND != aWhichLayer) {
return NS_OK;
}
if ((0 != (mState & TEXT_BLINK_ON)) && nsBlinkTimer::GetBlinkIsOff()) {
return NS_OK;
}
nsIStyleContext* sc = mStyleContext;
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && isVisible) {
TextStyle ts(aPresContext, aRenderingContext, mStyleContext);
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing)
|| ts.mJustifying) {
PaintTextSlowly(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
// Get the text fragment
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
const nsTextFragment* frag = nsnull;
if (tc.get()) {
tc->GetText(&frag);
}
if (!frag) {
return NS_ERROR_FAILURE;
}
// Choose rendering pathway based on rendering context performance
// hint, whether it needs to be transformed, and whether it's
// multi-byte
PRBool hasMultiByteChars = (0 != (mState & TEXT_HAS_MULTIBYTE));
PRUint32 hints = 0;
aRenderingContext.GetHints(hints);
#ifdef IBMBIDI
PRBool bidiEnabled;
aPresContext->GetBidiEnabled(&bidiEnabled);
#else
const PRBool bidiEnabled = PR_FALSE;
#endif // IBMBIDI
// * BiDi text or text with multi-byte characters must always be
// rendered as Unicode.
// * Non-transformed, 1-byte text should always be rendered as
// ASCII.
// * Other transformed or 2-byte text should be rendered according
// to the preference of the hint from the rendering context.
if (bidiEnabled || hasMultiByteChars ||
((0 == (hints & NS_RENDERING_HINT_FAST_8BIT_TEXT)) &&
(frag->Is2b() || (0 != (mState & TEXT_WAS_TRANSFORMED))))) {
PaintUnicodeText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
PaintAsciiText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
}
}
DO_GLOBAL_REFLOW_COUNT_DSP("nsTextFrame", &aRenderingContext);
return NS_OK;
}
/**
* Prepare the text in the content for rendering. If aIndexes is not nsnull
* then fill in aIndexes's with the mapping from the original input to
* the prepared output.
*/
PRIntn
nsTextFrame::PrepareUnicodeText(nsTextTransformer& aTX,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen)
{
PRIntn numSpaces = 0;
// Setup transform to operate starting in the content at our content
// offset
aTX.Init(this, mContent, mContentOffset);
PRInt32 strInx = mContentOffset;
PRInt32* indexp = aIndexBuffer ? aIndexBuffer->mBuffer : nsnull;
// Skip over the leading whitespace
PRInt32 n = mContentLength;
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
aTX.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
// we trip this assertion in bug 31053, but I think it's unnecessary
//NS_ASSERTION(isWhitespace, "mState and content are out of sync");
#ifdef IBMBIDI
if (mState & NS_FRAME_IS_BIDI
&& contentLen > mContentLength) {
contentLen = mContentLength;
}
#endif // IBMBIDI
if (isWhitespace) {
if (nsnull != indexp) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx;
}
}
n -= contentLen;
if(n<0)
NS_WARNING("mContentLength is < FragmentLength");
}
}
// Rescan the content and transform it. Stop when we have consumed
// mContentLength characters.
PRBool inWord = (TEXT_IN_WORD & mState) ? PR_TRUE : PR_FALSE;
PRInt32 column = mColumn;
PRInt32 textLength = 0;
PRInt32 dstOffset = 0;
while (0 != n) {
PRUnichar* bp;
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
// Get the next word
bp = aTX.GetNextWord(inWord, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
if (nsnull == bp) {
#ifdef IBMBIDI
if (indexp && (mState & NS_FRAME_IS_BIDI) ) {
while (--n >= 0) {
*indexp++ = strInx++;
}
}
#endif // IBMBIDI
break;
}
if (contentLen > n) {
contentLen = n;
}
if (wordLen > n) {
wordLen = n;
}
inWord = PR_FALSE;
if (isWhitespace) {
if ('\t' == bp[0]) {
PRInt32 spaces = 8 - (7 & column);
PRUnichar* tp = bp;
wordLen = spaces;
while (--spaces >= 0) {
*tp++ = ' ';
}
// XXX This is a one to many mapping that I think isn't handled well
if (nsnull != indexp) {
*indexp++ = strInx;
strInx += wordLen;
}
}
else if ('\n' == bp[0]) {
if (nsnull != indexp) {
*indexp++ = strInx;
}
break;
}
else if (nsnull != indexp) {
if (1 == wordLen) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx;
}
strInx++;
} else {
// Point mapping indicies at each content index in the word
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx++;
}
}
}
numSpaces += wordLen;
}
else {
PRInt32 i;
if (nsnull != indexp) {
// Point mapping indicies at each content index in the word
if (1 == wordLen && contentLen == 2 && IS_CJ_CHAR(*bp)) {
// if all these condition meets, we have a '\n' between CJK chars,
// and this '\n' should be removed.
i = contentLen;
while (--i >= 0) {
*indexp++ = strInx;
}
strInx++;
} else {
i = contentLen;
while (--i >= 0) {
*indexp++ = strInx++;
}
}
}
// Nonbreaking spaces count as spaces, not letters
PRUnichar* tp = bp;
i = wordLen;
while (--i >= 0) {
if (*tp++ == ' ') {
numSpaces++;
}
}
}
// Grow the buffer before we run out of room. The only time this
// happens is because of tab expansion.
if (aTextBuffer != nsnull && dstOffset + wordLen > aTextBuffer->mBufferLen) {
nsresult rv = aTextBuffer->GrowBy(wordLen);
if (NS_FAILED(rv)) {
break;
}
}
column += wordLen;
textLength += wordLen;
n -= contentLen;
if (aTextBuffer != nsnull) {
memcpy(aTextBuffer->mBuffer + dstOffset, bp,
sizeof(PRUnichar)*wordLen);
}
dstOffset += wordLen;
}
#ifdef DEBUG
if (aIndexBuffer) {
NS_ASSERTION(indexp <= aIndexBuffer->mBuffer + aIndexBuffer->mBufferLen,
"yikes - we just overwrote memory");
}
if (aTextBuffer) {
NS_ASSERTION(dstOffset <= aTextBuffer->mBufferLen,
"yikes - we just overwrote memory");
}
#endif
// Remove trailing whitespace if it was trimmed after reflow
// TEXT_TRIMMED_WS can be set in measureText during reflow, and
// nonexitent text buffer may occur in this situation.
if (TEXT_TRIMMED_WS & mState && aTextBuffer) {
if (--dstOffset >= 0) {
PRUnichar ch = aTextBuffer->mBuffer[dstOffset];
if (XP_IS_SPACE(ch)) {
textLength--;
numSpaces--;
}
}
}
if (aIndexBuffer) {
PRInt32* ip = aIndexBuffer->mBuffer;
ip[mContentLength] = ip[mContentLength-1];
if ((ip[mContentLength] - mContentOffset) < textLength) {
// Must set up last one for selection beyond edge if in boundary
ip[mContentLength] = textLength + mContentOffset;
}
}
*aTextLen = textLength;
return numSpaces;
}
//#define SHOW_SELECTION_CURSOR // should be turned off when the caret code is activated
#ifdef SHOW_SELECTION_CURSOR
// XXX This clearly needs to be done by the container, *somehow*
#define CURSOR_COLOR NS_RGB(0,0,255)
static void
RenderSelectionCursor(nsIRenderingContext& aRenderingContext,
nscoord dx, nscoord dy, nscoord aHeight,
nscolor aCursorColor)
{
nsPoint pnts[4];
nscoord ox = aHeight / 4;
nscoord oy = ox;
nscoord x0 = dx;
nscoord y0 = dy + aHeight;
pnts[0].x = x0 - ox;
pnts[0].y = y0;
pnts[1].x = x0;
pnts[1].y = y0 - oy;
pnts[2].x = x0 + ox;
pnts[2].y = y0;
pnts[3].x = x0 - ox;
pnts[3].y = y0;
// Draw little blue triangle
aRenderingContext.SetColor(aCursorColor);
aRenderingContext.FillPolygon(pnts, 4);
}
#endif
// XXX letter-spacing
// XXX word-spacing
#if defined(XP_PC) || defined(XP_UNIX) || defined(XP_MAC)
#define USE_INVERT_FOR_SELECTION
#endif
// XXX we should get the following from style sheet or LookAndFeel later
#define IME_RAW_COLOR NS_RGB(198,33,66)
#define IME_CONVERTED_COLOR NS_RGB(255,198,198)
void
nsTextFrame::PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRUnichar *aText, /*=nsnull*/
SelectionDetails *aDetails,/*= nsnull*/
PRUint32 aIndex, /*= 0*/
PRUint32 aLength, /*= 0*/
const nscoord* aSpacing /* = nsnull*/ )
{
nscolor overColor;
nscolor underColor;
nscolor strikeColor;
nsCOMPtr<nsIStyleContext> context = aStyleContext;
PRBool useOverride = PR_FALSE;
nscolor overrideColor;
PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE; // Begin with no decorations
PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE | NS_STYLE_TEXT_DECORATION_OVERLINE |
NS_STYLE_TEXT_DECORATION_LINE_THROUGH; // A mask of all possible decorations.
PRBool hasDecorations = context->HasTextDecorations();
do { // find decoration colors
const nsStyleTextReset* styleText =
(const nsStyleTextReset*)context->GetStyleData(eStyleStruct_TextReset);
if (!useOverride && (NS_STYLE_TEXT_DECORATION_OVERRIDE_ALL & styleText->mTextDecoration)) {
// This handles the <a href="blah.html"><font color="green">La la la</font></a> case.
// The link underline should be green.
const nsStyleColor* styleColor =
(const nsStyleColor*)context->GetStyleData(eStyleStruct_Color);
useOverride = PR_TRUE;
overrideColor = styleColor->mColor;
}
if (decorMask & styleText->mTextDecoration) { // a decoration defined here
const nsStyleColor* styleColor =
(const nsStyleColor*)context->GetStyleData(eStyleStruct_Color);
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & decorMask & styleText->mTextDecoration) {
underColor = useOverride ? overrideColor : styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
decorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
}
if (NS_STYLE_TEXT_DECORATION_OVERLINE & decorMask & styleText->mTextDecoration) {
overColor = useOverride ? overrideColor : styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
decorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
}
if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & decorMask & styleText->mTextDecoration) {
strikeColor = useOverride ? overrideColor : styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
decorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
}
}
if (0 != decorMask) {
context = context->GetParent();
if (context) {
hasDecorations = context->HasTextDecorations();
}
}
} while (context && hasDecorations && (0 != decorMask));
nscoord offset;
nscoord size;
nscoord baseline = mAscent;
if (decorations & (NS_FONT_DECORATION_OVERLINE | NS_FONT_DECORATION_UNDERLINE)) {
aTextStyle.mNormalFont->GetUnderline(offset, size);
if (decorations & NS_FONT_DECORATION_OVERLINE) {
aRenderingContext.SetColor(overColor);
aRenderingContext.FillRect(aX, aY, aWidth, size);
}
if (decorations & NS_FONT_DECORATION_UNDERLINE) {
aRenderingContext.SetColor(underColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
}
if (decorations & NS_FONT_DECORATION_LINE_THROUGH) {
aTextStyle.mNormalFont->GetStrikeout(offset, size);
aRenderingContext.SetColor(strikeColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
if (aDetails){
nsRect rect;
GetRect(rect);
while(aDetails){
const nscoord* sp= aSpacing;
PRInt32 startOffset = 0;
PRInt32 textWidth = 0;
PRInt32 start = PR_MAX(0,(aDetails->mStart - (PRInt32)aIndex));
PRInt32 end = PR_MIN((PRInt32)aLength,(aDetails->mEnd - (PRInt32)aIndex));
PRInt32 i;
if ((start < end) && ((aLength - start) > 0))
{
//aDetails allready processed to have offsets from frame start not content offsets
if (start < end){
if (aLength == 1)
textWidth = aWidth;
else {
if (aDetails->mStart > 0){
if (sp)
{
for (i = 0; i < start;i ++){
startOffset += *sp ++;
}
}
else
aRenderingContext.GetWidth(aText, start, startOffset);
}
if (sp){
for (i = start; i < end;i ++){
textWidth += *sp ++;
}
}
else
aRenderingContext.GetWidth(aText + start,
PRUint32(end - start), textWidth);
}
switch (aDetails->mType)
{
case nsISelectionController::SELECTION_NORMAL:
#if 0
{
//using new selectionpainting now
//
// XOR InvertRect is currently implemented only in the unix and windows
// rendering contexts. When other platforms implement InvertRect(), they
// can be added here. Eventually this #ifdef should die.
//
// For platforms that dont implement InvertRect(), the selection will be
// a non-filled rectangle.
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(0,0,0));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
}
#endif //0
break;
case nsISelectionController::SELECTION_SPELLCHECK:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.FillRect(aX + startOffset, aY + baseline - offset, textWidth, size);
}break;
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:{
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(255,255,128));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_RAW_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_RAWINPUT:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_RAW_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:{
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(255,255,128));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
default:
NS_ASSERTION(0,"what type of selection do i not know about?");
break;
}
}
}
aDetails = aDetails->mNext;
}
}
}
nsresult
nsTextFrame::GetContentAndOffsetsForSelection(nsIPresContext *aPresContext, nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength)
{
if (!aContent || !aOffset || !aLength)
return NS_ERROR_NULL_POINTER;
//ARE WE GENERATED??
*aContent = nsnull;
*aOffset = mContentOffset;
*aLength = mContentLength;
nsIFrame *parent;
nsresult rv = GetParent(&parent);
if (NS_SUCCEEDED(rv) && parent)
{
if ((mState & NS_FRAME_GENERATED_CONTENT) != 0)//parent is generated so so are we.
{
//we COULD check the previous sibling but I dont think that is reliable
rv = parent->GetContent(aContent);
if (NS_FAILED(rv))
return rv;
if(!*aContent)
return NS_ERROR_FAILURE;
//ARE WE A BEFORE FRAME? if not then we assume we are an after frame. this may be bad later
nsIFrame *grandParent;
nsIFrame *firstParent;
rv = parent->GetParent(&grandParent);
if (NS_SUCCEEDED(rv) && grandParent)
{
rv = grandParent->FirstChild(aPresContext,nsnull, &firstParent);
if (NS_SUCCEEDED(rv) && firstParent)
{
*aLength = 0;
if (firstParent == parent) //then our parent is the first child of granddad. use BEFORE
{
*aOffset = 0;
}
else
{
PRInt32 numChildren;
if (NS_SUCCEEDED(rv = (*aContent)->ChildCount(numChildren)))
*aOffset = numChildren;
else
return rv;
}
}
else
return rv;
}
}
}
//END GENERATED BLOCK
if (!*aContent)
{
*aContent = mContent;
NS_IF_ADDREF(*aContent);
}
return NS_OK;
}
//---------------------------------------------------------
nsresult nsTextFrame::GetTextInfoForPainting(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIPresShell** aPresShell,
nsISelectionController** aSelectionController,
PRBool& aDisplayingSelection,
PRBool& aIsPaginated,
PRBool& aIsSelected,
PRInt16& aSelectionValue,
nsILineBreaker** aLineBreaker)
{
NS_ENSURE_ARG_POINTER(aPresContext);
NS_ENSURE_ARG_POINTER(aPresShell);
NS_ENSURE_ARG_POINTER(aSelectionController);
NS_ENSURE_ARG_POINTER(aLineBreaker);
//get the presshell
nsresult rv = aPresContext->GetShell(aPresShell);
if (NS_FAILED(rv) || (*aPresShell) == nsnull)
return NS_ERROR_FAILURE;
//get the selection controller
rv = GetSelectionController(aPresContext, aSelectionController);
if (NS_FAILED(rv) || !(*aSelectionController))
return NS_ERROR_FAILURE;
aPresContext->IsPaginated(&aIsPaginated);
PRBool isRenderingOnlySelection;
aPresContext->IsRenderingOnlySelection(&isRenderingOnlySelection);
(*aSelectionController)->GetDisplaySelection(&aSelectionValue);
if(aIsPaginated){
aDisplayingSelection = isRenderingOnlySelection;
} else {
//if greater than hidden then we display some kind of selection
aDisplayingSelection = (aSelectionValue > nsISelectionController::SELECTION_HIDDEN);
}
PRInt16 textSel=0;
(*aSelectionController)->GetSelectionFlags(&textSel);
if (!(textSel & nsISelectionDisplay::DISPLAY_TEXT))
aDisplayingSelection = PR_FALSE;
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsCOMPtr<nsIDocument> doc;
(*aPresShell)->GetDocument(getter_AddRefs(doc));
if (!doc)
return NS_ERROR_FAILURE;
doc->GetLineBreaker(aLineBreaker);
nsFrameState frameState;
GetFrameState(&frameState);
aIsSelected = (frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
return NS_OK;
}
PRBool
nsTextFrame::IsTextInSelection(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection;
PRBool isPaginated;
PRBool isSelected;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
selectionValue,
getter_AddRefs(lb)))) {
return PR_FALSE;
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return PR_FALSE;
}
TextStyle ts(aPresContext, aRenderingContext, mStyleContext);
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
if (0 != textLength) {
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frameSelection from the selection controller
if (selCon) {
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
nsresult rv = NS_OK;
//if that failed get it from the pres shell
if (!frameSelection)
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(rv) && frameSelection){
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,getter_AddRefs(content),&offset,&length);
if (NS_SUCCEEDED(rv) && content){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details, PR_FALSE);
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
//while we have substrings...
//PRBool drawn = PR_FALSE;
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength, ts, nsISelectionController::SELECTION_NORMAL, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First()) {
return PR_TRUE;
}
sdptr = details;
if (details) {
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
return PR_FALSE;
}
NS_IMETHODIMP
nsTextFrame::IsVisibleForPainting(nsIPresContext * aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aCheckVis,
PRBool* aIsVisible)
{
if (aCheckVis) {
const nsStyleVisibility* vis =
(const nsStyleVisibility*)mStyleContext->GetStyleData(eStyleStruct_Visibility);
if (!vis->IsVisible()) {
*aIsVisible = PR_FALSE;
return NS_OK;
}
}
// Start by assuming we are visible and need to be painted
PRBool isVisible = PR_TRUE;
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (isPaginated) {
PRBool isRendingSelection;
aPresContext->IsRenderingOnlySelection(&isRendingSelection);
if (isRendingSelection) {
// Check the quick way first
PRBool isSelected = (mState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
if (isSelected) {
isVisible = IsTextInSelection(aPresContext, aRenderingContext);
} else {
isVisible = PR_FALSE;
}
}
}
*aIsVisible = isVisible;
return NS_OK;
}
void
nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection,canDarkenColor=PR_FALSE;
PRBool isPaginated;
PRBool isSelected;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
#ifdef IBMBIDI
PRUint8 level = 0;
#endif
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
nscoord width = mRect.width;
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
if (0 != textLength)
{
#ifdef IBMBIDI
PRBool isRightToLeftOnBidiPlatform = PR_FALSE;
PRBool isBidiSystem = PR_FALSE;
PRBool bidiEnabled;
nsCharType charType = eCharType_LeftToRight;
aPresContext->GetBidiEnabled(&bidiEnabled);
if (bidiEnabled) {
aPresContext->GetIsBidiSystem(isBidiSystem);
GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, (void**) &level,sizeof(level));
GetBidiProperty(aPresContext, nsLayoutAtoms::charType, (void**) &charType,sizeof(charType));
isRightToLeftOnBidiPlatform = (isBidiSystem &&
(eCharType_RightToLeft == charType ||
eCharType_RightToLeftArabic == charType));
if (isRightToLeftOnBidiPlatform) {
// indicate that the platform should use its native
// capabilities to reorder the text with right-to-left
// base direction
aRenderingContext.SetRightToLeftText(PR_TRUE);
}
nsBidiPresUtils* bidiUtils;
aPresContext->GetBidiUtils(&bidiUtils);
if (bidiUtils) {
PRInt32 rememberTextLength = textLength;
bidiUtils->ReorderUnicodeText(text, textLength,
charType, level & 1, isBidiSystem);
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
}
}
#endif // IBMBIDI
if (!displaySelection || !isSelected ) //draw text normally
{
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else
{ //we draw according to selection rules
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frameSelection from the selection controller
if (selCon)
{
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
//if that failed get it from the pres shell
nsresult rv = NS_OK;
if (!frameSelection)
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(rv) && frameSelection){
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,getter_AddRefs(content),&offset,&length);
if (NS_SUCCEEDED(rv) && content){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details, PR_FALSE);
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
#ifdef SUNCTL
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
nsCOMPtr<nsILE> mCtlObj;
mCtlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
mCtlObj = nsnull;
}
else {
PRInt32 mStart, mEnd;
if (sdptr->mEnd < textLength) {
mCtlObj->GetRangeOfCluster(text, PRInt32(textLength), sdptr->mEnd, &mStart, &mEnd);
if (sdptr->mStart > sdptr->mEnd) /* Left Edge */
sdptr->mEnd = mStart;
else
sdptr->mEnd = mEnd;
}
/* Always start selection from a Right Edge */
if (sdptr->mStart > 0) {
mCtlObj->GetRangeOfCluster(text, PRInt32(textLength), sdptr->mStart, &mStart, &mEnd);
sdptr->mStart = mEnd;
}
}
#endif /* SUNCTL */
#ifdef IBMBIDI
AdjustSelectionPointsForBidi(sdptr, textLength, CHARTYPE_IS_RTL(charType), level & 1, isBidiSystem);
#endif
sdptr = sdptr->mNext;
}
//while we have substrings...
//PRBool drawn = PR_FALSE;
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nscoord newWidth;//temp
#ifdef IBMBIDI // Simon - display substrings RTL in RTL frame
nscoord FrameWidth = 0;
if (isRightToLeftOnBidiPlatform)
if (NS_SUCCEEDED(aRenderingContext.GetWidth(text, textLength, FrameWidth)))
currentX = dx + FrameWidth;
#endif
while (!iter.IsDone())
{
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor = iter.CurrentForeGroundColor();
nscolor currentBKColor;
PRBool isCurrentBKColorTransparent;
#ifdef IBMBIDI
if (currentlength > 0
&& NS_SUCCEEDED(aRenderingContext.GetWidth(currenttext, currentlength,newWidth)))//ADJUST FOR CHAR SPACING
{
if (isRightToLeftOnBidiPlatform)
currentX -= newWidth;
#else // not IBMBIDI
if (NS_SUCCEEDED(aRenderingContext.GetWidth(currenttext, currentlength,newWidth)))//ADJUST FOR CHAR SPACING
{
#endif
if (iter.CurrentBackGroundColor(currentBKColor, &isCurrentBKColorTransparent) && !isPaginated)
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
}
currentFGColor = EnsureDifferentColors(currentFGColor, currentBKColor);
}
}
else
newWidth =0;
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(currenttext, currentlength, currentX, dy + mAscent);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
aRenderingContext.DrawString(currenttext, currentlength, currentX, dy + mAscent);
}
#ifdef IBMBIDI
if (!isRightToLeftOnBidiPlatform)
#endif
currentX+=newWidth;//increment twips X start
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width, text, details,0,(PRUint32)textLength);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
#ifdef IBMBIDI
if (isRightToLeftOnBidiPlatform) {
// indicate that future text should not be reordered with
// right-to-left base direction
aRenderingContext.SetRightToLeftText(PR_FALSE);
}
#endif // IBMBIDI
}
}
//measure Spaced Textvoid
nsresult
nsTextFrame::GetPositionSlowly(nsIPresContext* aPresContext,
nsIRenderingContext* aRendContext,
const nsPoint& aPoint,
nsIContent** aNewContent,
PRInt32& aOffset)
{
// pre-condition tests
NS_PRECONDITION(aPresContext && aRendContext && aNewContent, "null arg");
if (!aPresContext || !aRendContext || !aNewContent) {
return NS_ERROR_NULL_POINTER;
}
// initialize out param
*aNewContent = nsnull;
TextStyle ts(aPresContext, *aRendContext, mStyleContext);
if (!ts.mSmallCaps && !ts.mWordSpacing && !ts.mLetterSpacing && !ts.mJustifying) {
return NS_ERROR_INVALID_ARG;
}
nsIView * view;
nsPoint origin;
GetOffsetFromView(aPresContext, origin, &view);
/* This if clause is the cause of much pain. If aNewContent is set, then any
* code path that returns an error must set aNewContent to null before returning,
* or risk the caller unknowingly decrementing aNewContent inappropriately.
* Here's what Robert O'Callahan has to say on the matter:
If I'm not mistaken, in GetPositionSlowly, the values of aNewContent and
aOffset set in the conditional "if (aPoint.x - origin.x < 0)" are
overwritten on all successful return paths. Since they should never be
used by the caller if the function fails, that entire "if" statement is
--- or should be --- a no-op. Come to think of it, it doesn't make sense
either; setting aOffset to zero is nonsense.
I recommend you just delete that "if" statement.
*
* If this clause is removed, then some of the bullet-proofing code
* prefaced with "bug 56704" comments can be removed as well.
*/
if (aPoint.x - origin.x < 0)
{
*aNewContent = mContent;
aOffset =0;
}
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
// If we've already assigned aNewContent, make sure to 0 it out here.
// See bug 56704.
*aNewContent = nsnull;
return rv;
}
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
PRInt32 numSpaces;
#ifdef IBMBIDI
// Simulate a non-Bidi system for char by char measuring
PRBool isBidiSystem = PR_FALSE;
aPresContext->GetIsBidiSystem(isBidiSystem);
aPresContext->SetIsBidiSystem(PR_FALSE);
#endif
numSpaces = PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
#ifdef IBMBIDI
aPresContext->SetIsBidiSystem(isBidiSystem);
#endif
if (textLength <= 0) {
// If we've already assigned aNewContent, make sure to 0 it out here.
// aNewContent is undefined in the case that we return a failure,
// If we were to return a valid pointer, we risk decrementing that node's
// ref count an extra time by the caller.
// See bug 56704 for more details.
*aNewContent = nsnull;
return NS_ERROR_FAILURE;
}
#ifdef IBMBIDI // Simon -- reverse RTL text here
PRUint8 level;
GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, (void**)&level,sizeof(level));
PRBool isOddLevel = (level & 1);
if (isOddLevel) {
PRUnichar *tStart, *tEnd;
PRUnichar tSwap;
for (tStart = paintBuffer.mBuffer, tEnd = tStart + textLength - 1; tEnd > tStart; tStart++, tEnd--) {
tSwap = *tStart;
*tStart = *tEnd;
*tEnd = tSwap;
}
}
#endif // IBMBIDI
ComputeExtraJustificationSpacing(*aRendContext, ts, paintBuffer.mBuffer, textLength, numSpaces);
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
nsCOMPtr<nsIPref> prefs( do_GetService(kPrefCID, &rv) );
PRInt32 prefInt = 0;
PRBool outofstylehandled = PR_FALSE;
if (NS_SUCCEEDED(rv) && prefs)
{
if (NS_SUCCEEDED(prefs->GetIntPref("browser.drag_out_of_frame_style", &prefInt)) && prefInt)
{
if (aPoint.y < origin.y)//above rectangle
{
aOffset = mContentOffset;
outofstylehandled = PR_TRUE;
}
else if ((aPoint.y - origin.y) > mRect.height)
{
aOffset = mContentOffset + mContentLength;
outofstylehandled = PR_TRUE;
}
}
}
if (!outofstylehandled) //then we drag to closest X point and dont worry about the 'Y'
//END STYLE RULE
{
//the following will first get the index into the PAINTBUFFER then the actual content
nscoord adjustedX = PR_MAX(0,aPoint.x-origin.x);
#ifdef IBMBIDI
if (isOddLevel)
aOffset = mContentOffset+textLength-GetLengthSlowly(*aRendContext, ts,paintBuffer.mBuffer,textLength,adjustedX);
else
#endif
aOffset = mContentOffset+GetLengthSlowly(*aRendContext, ts,paintBuffer.mBuffer,textLength,adjustedX);
PRInt32 i;
PRInt32* ip = indexBuffer.mBuffer;
for (i = 0;i <= mContentLength; i ++){
if ((ip[i] >= aOffset) && //reverse mapping
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
aOffset = i + mContentOffset;
break;
}
}
}
*aNewContent = mContent;
if (*aNewContent)
(*aNewContent)->AddRef();
return NS_OK;
}
void
nsTextFrame::RenderString(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aX, nscoord aY,
nscoord aWidth,
SelectionDetails *aDetails /*=nsnull*/)
{
PRUnichar buf[TEXT_BUF_SIZE];
PRUnichar* bp0 = buf;
nscoord spacingMem[TEXT_BUF_SIZE];
nscoord* sp0 = spacingMem;
PRBool spacing = (0 != aTextStyle.mLetterSpacing) ||
(0 != aTextStyle.mWordSpacing) || aTextStyle.mJustifying;
//German 0x00df might expand to "SS", but no need to count it for speed reason
if (aTextStyle.mSmallCaps) {
if (aLength*2 > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength*2];
if (spacing)
sp0 = new nscoord[aLength*2];
}
}
else if (aLength > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength];
if (spacing)
sp0 = new nscoord[aLength];
}
PRUnichar* bp = bp0;
nscoord* sp = sp0;
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
PRInt32 pendingCount;
PRUnichar* runStart = bp;
nscoord charWidth, width = 0;
PRInt32 countSoFar = 0;
for (; --aLength >= 0; aBuffer++) {
nsIFontMetrics* nextFont;
nscoord glyphWidth;
PRUnichar ch = *aBuffer;
if (aTextStyle.mSmallCaps &&
(IsLowerCase(ch) || (ch == kSZLIG))) {
nextFont = aTextStyle.mSmallFont;
PRUnichar upper_ch;
// German szlig should be expanded to "SS".
if (ch == kSZLIG)
upper_ch = (PRUnichar)'S';
else
upper_ch = ToUpperCase(ch);
if (lastFont != aTextStyle.mSmallFont) {
aRenderingContext.SetFont(aTextStyle.mSmallFont);
aRenderingContext.GetWidth(upper_ch, charWidth);
aRenderingContext.SetFont(aTextStyle.mNormalFont);
}
else {
aRenderingContext.GetWidth(upper_ch, charWidth);
}
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
if (ch == kSZLIG) //add an additional 'S' here.
{
*bp++ = upper_ch;
if (spacing)
*sp++ = glyphWidth;
width += glyphWidth;
}
ch = upper_ch;
}
else if (ch == ' ') {
nextFont = aTextStyle.mNormalFont;
glyphWidth = aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing + aTextStyle.mLetterSpacing
+ aTextStyle.mExtraSpacePerSpace;
if ((PRUint32)--aTextStyle.mNumSpacesToRender <
(PRUint32)aTextStyle.mNumSpacesReceivingExtraJot) {
glyphWidth++;
}
}
else {
if (lastFont != aTextStyle.mNormalFont) {
aRenderingContext.SetFont(aTextStyle.mNormalFont);
}
if (IS_HIGH_SURROGATE(ch) && aLength > 0 &&
IS_LOW_SURROGATE(*(aBuffer+1))) {
// special handling for surrogate pair
aRenderingContext.GetWidth(aBuffer, 2, charWidth);
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
// copy the surrogate low
*bp++ = ch;
--aLength;
aBuffer++;
ch = *aBuffer;
// put the width into the space buffer
width += glyphWidth;
*sp++ = glyphWidth;
// set the glyphWidth to 0 so the code later will
// set a 0 for one element in space array for surrogate low to 0
glyphWidth = 0;
} else {
aRenderingContext.GetWidth(ch, charWidth);
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
}
if (lastFont != aTextStyle.mNormalFont) {
aRenderingContext.SetFont(aTextStyle.mSmallFont);
}
nextFont = aTextStyle.mNormalFont;
}
if (nextFont != lastFont) {
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
//aRenderingContext.SetColor(aTextStyle.mColor->mColor); commenting out redundat(and destructive) call to setcolor
aRenderingContext.DrawString(runStart, pendingCount,
aX, aY + mAscent, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
aX, aY, width, runStart, aDetails,countSoFar,pendingCount, spacing ? sp0 : nsnull);
countSoFar += pendingCount;
aWidth -= width;
aX += width;
runStart = bp = bp0;
sp = sp0;
width = 0;
}
aRenderingContext.SetFont(nextFont);
lastFont = nextFont;
}
*bp++ = ch;
if (spacing)
*sp++ = glyphWidth;
width += glyphWidth;
}
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
aRenderingContext.DrawString(runStart, pendingCount, aX, aY + mAscent, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
aX, aY, aWidth, runStart, aDetails,countSoFar,pendingCount,
spacing ? sp0 : nsnull);
}
aTextStyle.mLastFont = lastFont;
if (bp0 != buf) {
delete [] bp0;
}
if (sp0 != spacingMem) {
delete [] sp0;
}
}
inline void
nsTextFrame::MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aTextStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
nsTextDimensions* aDimensionsResult)
{
nsIRenderingContext& rc = *aReflowState.rendContext;
aDimensionsResult->Clear();
GetTextDimensions(rc, aTextStyle, aWord, aWordLength, aDimensionsResult);
if (aTextStyle.mLastFont != aTextStyle.mNormalFont) {
rc.SetFont(aTextStyle.mNormalFont);
aTextStyle.mLastFont = aTextStyle.mNormalFont;
}
}
PRInt32
nsTextFrame::GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nsTextDimensions* aDimensionsResult,
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult.width size*/)
{
PRUnichar *inBuffer = aBuffer;
PRInt32 length = aLength;
nsAutoTextBuffer dimensionsBuffer;
if (NS_FAILED(dimensionsBuffer.GrowTo(length))) {
aDimensionsResult->Clear();
return 0;
}
PRUnichar* bp = dimensionsBuffer.mBuffer;
nsIFontMetrics* lastFont = aStyle.mLastFont;
nsTextDimensions sum, glyphDimensions;
while (--length >= 0) {
PRUnichar ch = *inBuffer++;
if (aStyle.mSmallCaps &&
(IsLowerCase(ch) || (ch == kSZLIG))) {
PRUnichar upper_ch;
// German szlig should be expanded to "SS".
if (ch == kSZLIG)
upper_ch = (PRUnichar)'S';
else
upper_ch = ToUpperCase(ch);
if (lastFont != aStyle.mSmallFont) {
lastFont = aStyle.mSmallFont;
aRenderingContext.SetFont(lastFont);
}
aRenderingContext.GetTextDimensions(&upper_ch, (PRUint32)1, glyphDimensions);
glyphDimensions.width += aStyle.mLetterSpacing;
if (ch == kSZLIG)
glyphDimensions.width += glyphDimensions.width;
}
else if (ch == ' ') {
glyphDimensions.width = aStyle.mSpaceWidth + aStyle.mLetterSpacing
+ aStyle.mWordSpacing + aStyle.mExtraSpacePerSpace;
if ((PRUint32)--aStyle.mNumSpacesToMeasure
< (PRUint32)aStyle.mNumSpacesReceivingExtraJot) {
++glyphDimensions.width;
}
}
else {
if (lastFont != aStyle.mNormalFont) {
lastFont = aStyle.mNormalFont;
aRenderingContext.SetFont(lastFont);
}
aRenderingContext.GetTextDimensions(&ch, (PRUint32)1, glyphDimensions);
glyphDimensions.width += aStyle.mLetterSpacing;
}
sum.Combine(glyphDimensions);
*bp++ = ch;
if (!aGetTextDimensions && sum.width >= aDimensionsResult->width) {
PRInt32 result = aLength - length;
if (2*(sum.width - aDimensionsResult->width) > glyphDimensions.width) //then we have gone too far, back up 1
result--;
aStyle.mLastFont = lastFont;
return result;
}
}
aStyle.mLastFont = lastFont;
*aDimensionsResult = sum;
return aLength;
}
// XXX factor in logic from RenderString into here; gaps, justification, etc.
void
nsTextFrame::GetTextDimensions(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nsTextDimensions* aDimensionsResult)
{
GetTextDimensionsOrLength(aRenderingContext,aTextStyle,aBuffer,aLength,aDimensionsResult,PR_TRUE);
}
PRInt32
nsTextFrame::GetLengthSlowly(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aWidth)
{
nsTextDimensions dimensions;
dimensions.width = aWidth;
return GetTextDimensionsOrLength(aRenderingContext,aStyle,aBuffer,aLength,&dimensions,PR_FALSE);
}
void
nsTextFrame::ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
PRInt32 aNumSpaces)
{
if (aTextStyle.mJustifying) {
nsTextDimensions trueDimensions;
// OK, so this is a bit ugly. The problem is that to get the right margin
// nice and clean, we have to apply a little extra space to *some* of the
// spaces. It has to be the same ones every time or things will go haywire.
// This implies that the GetTextDimensionsOrLength and RenderString functions depend
// on a little bit of secret state: which part of the prepared text they are
// looking at. It turns out that they get called in a regular way: they look
// at the text from the beginning to the end. So we just count which spaces
// we're up to, for each context.
// This is not a great solution, but a perfect solution requires much more
// widespread changes, to explicitly annotate all the transformed text fragments
// that are passed around with their position in the transformed text
// for the entire frame.
aTextStyle.mNumSpacesToMeasure = 0;
aTextStyle.mExtraSpacePerSpace = 0;
aTextStyle.mNumSpacesReceivingExtraJot = 0;
GetTextDimensions(aRenderingContext, aTextStyle, aBuffer, aLength, &trueDimensions);
aTextStyle.mNumSpacesToMeasure = aNumSpaces;
aTextStyle.mNumSpacesToRender = aNumSpaces;
nscoord extraSpace = mRect.width - trueDimensions.width;
if (extraSpace > 0 && aNumSpaces > 0) {
aTextStyle.mExtraSpacePerSpace = extraSpace/aNumSpaces;
aTextStyle.mNumSpacesReceivingExtraJot =
extraSpace - aTextStyle.mExtraSpacePerSpace*aNumSpaces;
}
}
}
void
nsTextFrame::PaintTextSlowly(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection;
PRBool isPaginated,canDarkenColor=PR_FALSE;
PRBool isSelected;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
nscoord width = mRect.width;
PRInt32 textLength;
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 numSpaces;
#ifdef IBMBIDI
// Simulate a non-Bidi system for char by char painting
PRBool isBidiSystem = PR_FALSE;
aPresContext->GetIsBidiSystem(isBidiSystem);
aPresContext->SetIsBidiSystem(PR_FALSE);
#endif
numSpaces = PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&paintBuffer, &textLength);
#ifdef IBMBIDI
aPresContext->SetIsBidiSystem(isBidiSystem);
#endif
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
if (0 != textLength) {
#ifdef IBMBIDI
PRBool bidiEnabled;
PRUint8 level = 0;
nsCharType charType = eCharType_LeftToRight;
aPresContext->GetBidiEnabled(&bidiEnabled);
if (bidiEnabled) {
nsBidiPresUtils* bidiUtils;
aPresContext->GetBidiUtils(&bidiUtils);
if (bidiUtils) {
GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel,
(void**) &level,sizeof(level));
GetBidiProperty(aPresContext, nsLayoutAtoms::charType,
(void**) &charType,sizeof(charType));
PRInt32 rememberTextLength = textLength;
// Since we paint char by char, handle the text like on non-bidi platform
bidiUtils->ReorderUnicodeText(text, textLength, charType,
level & 1, PR_FALSE);
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
}
}
#endif // IBMBIDI
ComputeExtraJustificationSpacing(aRenderingContext, aTextStyle, text, textLength, numSpaces);
if (!displaySelection || !isSelected) {
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text, textLength, dx, dy, width);
}
else
{
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frame selection
nsresult rv = NS_OK;
frameSelection = do_QueryInterface(selCon); //this MAY implement
if (!frameSelection)//if that failed get it from the presshell
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(rv) && frameSelection)
{
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,getter_AddRefs(content),&offset,&length);
if (NS_SUCCEEDED(rv))
{
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details, PR_FALSE);
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
#ifdef IBMBIDI
AdjustSelectionPointsForBidi(sdptr, textLength, CHARTYPE_IS_RTL(charType), level & 1, PR_FALSE);
#endif
sdptr = sdptr->mNext;
}
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nsTextDimensions newDimensions;//temp
while (!iter.IsDone())
{
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor = iter.CurrentForeGroundColor();
nscolor currentBKColor;
PRBool isCurrentBKColorTransparent;
GetTextDimensions(aRenderingContext,aTextStyle,currenttext, (PRInt32)currentlength,&newDimensions);
if (newDimensions.width)
{
if (iter.CurrentBackGroundColor(currentBKColor, &isCurrentBKColorTransparent))
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newDimensions.width, mRect.height);
}
currentFGColor = EnsureDifferentColors(currentFGColor, currentBKColor);
}
}
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
RenderString(aRenderingContext,aStyleContext, aTextStyle, currenttext,
currentlength, currentX, dy, width, details);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
RenderString(aRenderingContext,aStyleContext, aTextStyle, currenttext,
currentlength, currentX, dy, width, details);
}
//increment twips X start but remember to get ready for next draw by reducing current x by letter spacing amount
currentX+=newDimensions.width;// + aTextStyle.mLetterSpacing;
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
RenderString(aRenderingContext,aStyleContext, aTextStyle, text,
PRUint32(textLength), dx, dy, width, details);
}
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
}
void
nsTextFrame::PaintAsciiText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
NS_PRECONDITION(0 == (TEXT_HAS_MULTIBYTE & mState), "text is multi-byte");
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection,canDarkenColor=PR_FALSE;
PRBool isPaginated;
PRBool isSelected;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Get the text fragment
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
const nsTextFragment* frag = nsnull;
if (tc.get()) {
tc->GetText(&frag);
}
if (!frag) {
return;
}
// Make enough space to transform
nsAutoTextBuffer unicodePaintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
nsTextTransformer tx(lb, nsnull, aPresContext);
// See if we need to transform the text. If the text fragment is ascii and
// wasn't transformed, then we can skip this step. If we're displaying the
// selection and the text is selected, then we need to do this step so we
// can create the index buffer
PRInt32 textLength = 0;
const char* text;
char paintBufMem[TEXT_BUF_SIZE];
char* paintBuf = paintBufMem;
if (frag->Is2b() ||
(0 != (mState & TEXT_WAS_TRANSFORMED)) ||
(displaySelection && isSelected)) {
// Transform text from content into Unicode renderable form
// XXX If the text fragment is ascii, then we should ask the
// text transformer to leave the text in ascii. That way we can
// elimninate the conversion from Unicode back to ascii...
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&unicodePaintBuffer, &textLength);
// Translate unicode data into ascii for rendering
if (textLength > TEXT_BUF_SIZE) {
paintBuf = new char[textLength];
if (!paintBuf) {
return;
}
}
char* dst = paintBuf;
char* end = dst + textLength;
PRUnichar* src = unicodePaintBuffer.mBuffer;
while (dst < end) {
*dst++ = (char) ((unsigned char) *src++);
}
text = paintBuf;
}
else if (mContentOffset + mContentLength <= frag->GetLength()) {
text = frag->Get1b() + mContentOffset;
textLength = mContentLength;
// See if we should skip leading whitespace
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
while ((textLength > 0) && XP_IS_SPACE(*text)) {
text++;
textLength--;
}
}
// See if the text ends in a newline
if ((textLength > 0) && (text[textLength - 1] == '\n')) {
textLength--;
}
NS_ASSERTION(textLength >= 0, "bad text length");
}
else {
// This might happen if a paint event beats the reflow; e.g., as
// is the case in bug 73291. Not a big deal, because the reflow
// will schedule another invalidate.
NS_WARNING("content length exceeds fragment length");
}
nscoord width = mRect.width;
PRInt32* ip = indexBuffer.mBuffer;
if (0 != textLength) {
if (!displaySelection || !isSelected) {
//if selection is > content length then selection has "slid off"
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else {
SelectionDetails *details;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frame selection
frameSelection = do_QueryInterface(selCon); //this MAY implement
nsresult rv = NS_OK;
if (!frameSelection)//if that failed get it from the presshell
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
nsCOMPtr<nsIContent> content;
if (NS_SUCCEEDED(rv) && frameSelection){
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext, getter_AddRefs(content),&offset,&length);
if (NS_SUCCEEDED(rv)){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details, PR_FALSE);
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
DrawSelectionIterator iter(content, details,(PRUnichar *)text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext); //ITS OK TO CAST HERE THE RESULT WE USE WILLNOT DO BAD CONVERSION
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nscoord newWidth;//temp
while (!iter.IsDone())
{
char *currenttext = iter.CurrentTextCStrPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor = iter.CurrentForeGroundColor();
nscolor currentBKColor;
PRBool isCurrentBKColorTransparent;
if (NS_SUCCEEDED(aRenderingContext.GetWidth(currenttext, currentlength,newWidth)))//ADJUST FOR CHAR SPACING
{
if (iter.CurrentBackGroundColor(currentBKColor, &isCurrentBKColorTransparent) && !isPaginated)
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
}
currentFGColor = EnsureDifferentColors(currentFGColor, currentBKColor);
}
}
else
newWidth =0;
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.DrawString(currenttext, currentlength, currentX, dy + mAscent);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,isPaginated));
aRenderingContext.DrawString(currenttext, currentlength, currentX, dy + mAscent);
}
currentX+=newWidth;//increment twips X start
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width,
unicodePaintBuffer.mBuffer,
details, 0, textLength);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
}
//---------------------------------------------------
// Also defined for external use in nsTextFrame.h
//
// Uses a binary search for find where the cursor falls in the line of text
// It also keeps track of the part of the string that has already been measured
// so it doesn't have to keep measuring the same text over and over
//
// Param "aBaseWidth" contains the width in twips of the portion
// of the text that has already been measured, and aBaseInx contains
// the index of the text that has already been measured.
//
// aTextWidth returns the (in twips) the length of the text that falls before the cursor
// aIndex contains the index of the text where the cursor falls
PRBool
BinarySearchForPosition(nsIRenderingContext* acx,
const PRUnichar* aText,
PRInt32 aBaseWidth,
PRInt32 aBaseInx,
PRInt32 aStartInx,
PRInt32 aEndInx,
PRInt32 aCursorPos,
PRInt32& aIndex,
PRInt32& aTextWidth)
{
PRInt32 range = aEndInx - aStartInx;
if (range == 1) {
aIndex = aStartInx + aBaseInx;
acx->GetWidth(aText, aIndex, aTextWidth);
return PR_TRUE;
}
PRInt32 inx = aStartInx + (range / 2);
PRInt32 textWidth = 0;
acx->GetWidth(aText, inx, textWidth);
PRInt32 fullWidth = aBaseWidth + textWidth;
if (fullWidth == aCursorPos) {
aTextWidth = textWidth;
aIndex = inx;
return PR_TRUE;
} else if (aCursorPos < fullWidth) {
aTextWidth = aBaseWidth;
if (BinarySearchForPosition(acx, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
} else {
aTextWidth = fullWidth;
if (BinarySearchForPosition(acx, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
//---------------------------------------------------------------------------
// Uses a binary search to find the position of the cursor in the text.
// The "indices array is used to map from the compressed text back to the
// un-compressed text, selection is based on the un-compressed text, the visual
// display of selection is based on the compressed text.
//---------------------------------------------------------------------------
NS_IMETHODIMP
nsTextFrame::GetPosition(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd)
{
// pre-condition tests
NS_PRECONDITION(aCX && aNewContent, "null arg");
if (!aCX || !aNewContent) {
return NS_ERROR_NULL_POINTER;
}
// initialize out param
*aNewContent = nsnull;
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aCX->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsCOMPtr<nsIRenderingContext> acx;
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
if (NS_SUCCEEDED(rv)) {
TextStyle ts(aCX, *acx, mStyleContext);
if (ts.mSmallCaps || ts.mWordSpacing || ts.mLetterSpacing || ts.mJustifying) {
nsresult result = GetPositionSlowly(aCX, acx, aPoint, aNewContent,
aContentOffset);
aContentOffsetEnd = aContentOffset;
return result;
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Find the font metrics for this text
SetFontFromStyle(acx, mStyleContext);
// Get the renderable form of the text
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aCX)));
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull, aCX);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength <=0) {
//invalid frame to get position on
return NS_ERROR_FAILURE;
}
nsPoint origin;
nsIView * view;
GetOffsetFromView(aCX, origin, &view);
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
nsCOMPtr<nsIPref> prefs( do_GetService(kPrefCID, &rv) );
PRInt32 prefInt = 0;
PRBool outofstylehandled = PR_FALSE;
if (NS_SUCCEEDED(rv) && prefs)
{
if (NS_SUCCEEDED(prefs->GetIntPref("browser.drag_out_of_frame_style", &prefInt)) && prefInt)
{
if ((aPoint.y - origin.y) < 0)//above rectangle
{
aContentOffset = mContentOffset;
aContentOffsetEnd = aContentOffset;
outofstylehandled = PR_TRUE;
}
else if ((aPoint.y - origin.y) > mRect.height)
{
aContentOffset = mContentOffset + mContentLength;
aContentOffsetEnd = aContentOffset;
outofstylehandled = PR_TRUE;
}
}
}
if (!outofstylehandled) //then we need to track based on the X coord only
{
//END STYLE IF
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 indx;
PRInt32 textWidth = 0;
PRUnichar* text = paintBuffer.mBuffer;
#ifdef IBMBIDI
PRBool getReversedPos = PR_FALSE;
PRUint8 level = 0;
GetBidiProperty(aCX, nsLayoutAtoms::embeddingLevel, (void**)&level,sizeof(level));
getReversedPos = level & 1;
nscoord posX = (getReversedPos) ?
(mRect.width + origin.x) - (aPoint.x - origin.x) : aPoint.x;
PRBool found = BinarySearchForPosition(acx, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(posX) , //go to local coordinates
indx, textWidth);
#else
PRBool found = BinarySearchForPosition(acx, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(aPoint.x) , //go to local coordinates
indx, textWidth);
#endif // IBMBIDI
if (found) {
PRInt32 charWidth;
acx->GetWidth(text[indx], charWidth);
charWidth /= 2;
#ifdef IBMBIDI
if (getReversedPos) {
if (mRect.width - aPoint.x + origin.x > textWidth+charWidth ) {
indx++;
}
}
else
#endif // IBMBIDI
if ((aPoint.x - origin.x) > textWidth+charWidth) {
indx++;
}
}
aContentOffset = indx + mContentOffset;
//reusing wordBufMem
PRInt32 i;
for (i = 0; i < mContentLength; i ++){
if ((ip[i] >= aContentOffset) && //reverse mapping
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
break;
}
}
aContentOffset = i + mContentOffset;
#ifdef IBMBIDI
PRInt32 bidiStopOffset = mContentOffset + mContentLength;
if (aContentOffset >= mContentOffset && aContentOffset < bidiStopOffset) {
PRInt32 curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
while (curindx < textLength && IS_BIDI_DIACRITIC(text[curindx])) {
if (++aContentOffset >= bidiStopOffset)
break;
curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
}
}
#endif // IBMBIDI
aContentOffsetEnd = aContentOffset;
NS_ASSERTION(i<= mContentLength, "offset we got from binary search is messed up");
}
*aNewContent = mContent;
if (*aNewContent) {
(*aNewContent)->AddRef();
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent)
{
if (!aNewContent)
return NS_ERROR_NULL_POINTER;
*aNewContent = nsnull;//initialize
aContentOffset = 0;
aContentOffsetEnd = 0;
aBeginFrameContent = 0;
nsPoint newPoint;
newPoint.y = aPoint.y;
if (aPoint.x < 0)
newPoint.x = 0;
else
newPoint.x = aPoint.x;
nsresult rv = GetPosition(aCX, newPoint, aNewContent, aContentOffset, aContentOffsetEnd);
if (NS_FAILED(rv))
return rv;
if (aContentOffset == mContentOffset)
aBeginFrameContent = PR_TRUE;
else
aBeginFrameContent = PR_FALSE;
return rv;
}
// [HACK] Foward Declarations
void ForceDrawFrame(nsFrame * aFrame);
//null range means the whole thing
NS_IMETHODIMP
nsTextFrame::SetSelected(nsIPresContext* aPresContext,
nsIDOMRange *aRange,
PRBool aSelected,
nsSpread aSpread)
{
nsresult result;
if (aSelected && ParentDisablesSelection())
return NS_OK;
nsFrameState frameState;
GetFrameState(&frameState);
#if 0
PRBool isSelected = ((frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT);
if (!aSelected && !isSelected) //already set thanks
{
return NS_OK;
}
#endif
// check whether style allows selection
PRBool selectable;
IsSelectable(&selectable, nsnull);
if (!selectable)
return NS_OK;//do not continue no selection for this frame.
PRBool found = PR_FALSE;
PRBool wholeContentFound = PR_FALSE;//if the entire content we look at is selected.
if (aRange) {
//lets see if the range contains us, if so we must redraw!
nsCOMPtr<nsIDOMNode> endNode;
PRInt32 endOffset;
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
aRange->GetEndContainer(getter_AddRefs(endNode));
aRange->GetEndOffset(&endOffset);
aRange->GetStartContainer(getter_AddRefs(startNode));
aRange->GetStartOffset(&startOffset);
nsCOMPtr<nsIContent> content;
result = GetContent(getter_AddRefs(content));
nsCOMPtr<nsIDOMNode> thisNode;
thisNode = do_QueryInterface(content);
if (thisNode == startNode)
{
if ((mContentOffset + mContentLength) >= startOffset)
{
found = PR_TRUE;
if (thisNode == endNode)
{ //special case
if (endOffset == startOffset) //no need to redraw since drawing takes place with cursor
found = PR_FALSE;
if (mContentOffset > endOffset)
found = PR_FALSE;
}
}
}
else if (thisNode == endNode)
{
if (mContentOffset < endOffset)
found = PR_TRUE;
else
{
found = PR_FALSE;
wholeContentFound = PR_TRUE;
}
}
else
{
found = PR_TRUE;
}
}
else {
if ( aSelected != (PRBool)(frameState | NS_FRAME_SELECTED_CONTENT) ){
found = PR_TRUE;
}
}
if ( aSelected )
frameState |= NS_FRAME_SELECTED_CONTENT;
else
{//we need to see if any other selection available.
SelectionDetails *details = nsnull;
nsCOMPtr<nsIPresShell> shell;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsresult rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell){
nsCOMPtr<nsISelectionController> selCon;
rv = GetSelectionController(aPresContext, getter_AddRefs(selCon));
if (NS_SUCCEEDED(rv) && selCon)
{
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
if (!frameSelection)
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (NS_SUCCEEDED(rv) && frameSelection){
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext, getter_AddRefs(content),&offset,&length);
if (NS_SUCCEEDED(rv) && content){
rv = frameSelection->LookUpSelection(content, offset,
length , &details, PR_TRUE);
// PR_TRUE last param used here! we need to see if we are still selected. so no shortcut
}
}
}
if (!details)
frameState &= ~NS_FRAME_SELECTED_CONTENT;
else
{
SelectionDetails *sdptr = details;
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
SetFrameState(frameState);
if (found){ //if range contains this frame...
nsRect frameRect;
GetRect(frameRect);
nsRect rect(0, 0, frameRect.width, frameRect.height);
if (!rect.IsEmpty())
Invalidate(aPresContext, rect, PR_FALSE);
// ForceDrawFrame(this);
}
if (aSpread == eSpreadDown)
{
nsIFrame *frame;
GetPrevInFlow(&frame);
while(frame){
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
result = frame->GetPrevInFlow(&frame);
if (NS_FAILED(result))
break;
}
GetNextInFlow(&frame);
while (frame){
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
result = frame->GetNextInFlow(&frame);
if (NS_FAILED(result))
break;
}
#ifdef IBMBIDI
GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, (void**) &frame,sizeof(frame));
if (frame) {
frame->SetSelected(aPresContext, aRange, aSelected, aSpread);
}
#endif // IBMBIDI
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetPointFromOffset(nsIPresContext* aPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint)
{
if (!aPresContext || !inRendContext || !outPoint)
return NS_ERROR_NULL_POINTER;
if (mContentLength <= 0) {
outPoint->x = 0;
outPoint->y = 0;
return NS_OK;
}
inOffset-=mContentOffset;
if (inOffset < 0){
NS_ASSERTION(0,"offset less than this frame has in GetPointFromOffset");
inOffset = 0;
}
if (inOffset >= mContentLength)
inOffset = mContentLength;
TextStyle ts(aPresContext, *inRendContext, mStyleContext);
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Transform text from content into renderable form
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
PRInt32 numSpaces;
numSpaces = PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
ComputeExtraJustificationSpacing(*inRendContext, ts, paintBuffer.mBuffer, textLength, numSpaces);
PRInt32* ip = indexBuffer.mBuffer;
if (inOffset > mContentLength){
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
inOffset = mContentLength;
}
while (inOffset >=0 && ip[inOffset] < mContentOffset) //buffer has shrunk
inOffset --;
nscoord width = mRect.width;
if (inOffset <0)
{
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
inOffset=0;
width = 0;
}
else
{
PRInt32 hitLength = ip[inOffset] - mContentOffset;
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing) || ts.mJustifying)
{
nsTextDimensions dimensions;
GetTextDimensions(*inRendContext, ts, paintBuffer.mBuffer, hitLength, &dimensions);
width = dimensions.width;
}
else
{
PRInt32 totalLength = 0; // length up to the last-in-flow frame
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
if (tc) {
const nsTextFragment* frag;
tc->GetText(&frag);
totalLength = frag->GetLength(); // raw value which includes whitespace
}
if ((hitLength == textLength) && (inOffset = mContentLength) &&
(mContentOffset + mContentLength == totalLength)) {
// no need to re-measure when at the end of the last-in-flow
}
else
inRendContext->GetWidth(paintBuffer.mBuffer, hitLength, width);
}
if ((hitLength == textLength) && (TEXT_TRIMMED_WS & mState)) {
//
// Offset must be after a space that has
// been trimmed off the end of the frame.
// Add the width of the trimmed space back
// to the total width, so the caret appears
// in the proper place!
//
// NOTE: the trailing whitespace includes the word and letter spacing!!
width += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
}
}
#ifdef IBMBIDI
PRUint8 level;
GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, (void**)&level,sizeof(level));
if (level & 1) {
outPoint->x = mRect.width - width;
}
else
#endif // IBMBIDI
//XXX callers need to safeguard themselves against empty frames, I noted that
//the caret can be locked when leftarrow'ing in: <span>...</span>\n<br>line
if (width > mRect.width)
outPoint->x = mRect.width;
else
outPoint->x = width;
outPoint->y = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame **outChildFrame)
{
if (nsnull == outChildFrame)
return NS_ERROR_NULL_POINTER;
nsresult result;
PRInt32 contentOffset = inContentOffset;
if (contentOffset != -1) //-1 signified the end of the current content
contentOffset = inContentOffset - mContentOffset;
if ((contentOffset > mContentLength) || ((contentOffset == mContentLength) && inHint) )
{
//this is not the frame we are looking for.
nsIFrame *nextInFlow;
GetNextInFlow(&nextInFlow);
if (nextInFlow)
{
return nextInFlow->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
}
else {
#ifdef IBMBIDI // Simon
// There is no nextInFlow - check if there is a bidi
// continuation frame
if (mState & NS_FRAME_IS_BIDI)
{
nsIFrame *nextBidi;
GetNextSibling(&nextBidi);
if (nextBidi)
{
PRInt32 start, end;
if (NS_SUCCEEDED(nextBidi->GetOffsets(start, end)) && start > 0)
{
return nextBidi->GetChildFrameContainingOffset(inContentOffset,
inHint, outFrameContentOffset, outChildFrame);
}
}
}
#endif // IBMBIDI
{
if (contentOffset != mContentLength) //that condition was only for when there is a choice
return NS_ERROR_FAILURE;
}
}
}
if (inContentOffset < mContentOffset) //could happen with floaters!
{
result = GetPrevInFlow(outChildFrame);
if (NS_SUCCEEDED(result) && *outChildFrame)
return (*outChildFrame)->GetChildFrameContainingOffset(inContentOffset, inHint,
outFrameContentOffset,outChildFrame);
else
return result;
}
*outFrameContentOffset = contentOffset;
*outChildFrame = this;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::PeekOffset(nsIPresContext* aPresContext, nsPeekOffsetStruct *aPos)
{
#ifdef IBMBIDI
PRUint8 level, baseLevel;
GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel, (void**)&level,sizeof(level));
GetBidiProperty(aPresContext, nsLayoutAtoms::baseLevel, (void**)&baseLevel,sizeof(baseLevel));
PRBool isOddLevel = (level & 1);
if ((eSelectCharacter == aPos->mAmount)
|| (eSelectWord == aPos->mAmount))
aPos->mPreferLeft ^= isOddLevel;
#endif
if (!aPos || !mContent)
return NS_ERROR_NULL_POINTER;
if (aPos->mStartOffset < 0 )
aPos->mStartOffset = mContentLength + mContentOffset;
if (aPos->mStartOffset < mContentOffset){
aPos->mStartOffset = mContentOffset;
}
if (aPos->mStartOffset > (mContentOffset + mContentLength)){
nsIFrame *nextInFlow;
#ifdef IBMBIDI
if (isOddLevel) {
GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, (void**) &nextInFlow,sizeof(nextInFlow));
}
else
#endif
GetNextInFlow(&nextInFlow);
if (!nextInFlow){
NS_ASSERTION(PR_FALSE,"nsTextFrame::PeekOffset no more flow \n");
return NS_ERROR_INVALID_ARG;
}
return nextInFlow->PeekOffset(aPresContext, aPos);
}
if (aPos->mAmount == eSelectLine || aPos->mAmount == eSelectBeginLine
|| aPos->mAmount == eSelectEndLine || aPos->mAmount == eSelectParagraph)
{
return nsFrame::PeekOffset(aPresContext, aPos);
}
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 textLength;
nsresult result(NS_ERROR_FAILURE);
aPos->mResultContent = mContent;//do this right off
switch (aPos->mAmount){
case eSelectNoAmount:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, nsnull, aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength)//if no renderable length, you cant park here.
{
aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
else
{
aPos->mAmount = eSelectDir;//go to "next" or previous frame based on direction not THIS frame
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
else if (NS_FAILED(result))
return result;
}
}
break;
case eSelectCharacter:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, nsnull, aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsIFrame *frameUsed = nsnull;
PRInt32 start;
PRBool found = PR_TRUE;
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
// so that right arrow always moves to the right on screen
// and left arrow always moves left
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
((aPos->mDirection == eDirNext) && isOddLevel) ){
#else
if (aPos->mDirection == eDirPrevious){
#endif
aPos->mContentOffset = 0;
PRInt32 i;
#ifdef SUNCTL
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
nsCOMPtr<nsILE> mCtlObj;
mCtlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
mCtlObj = nsnull;
#endif /* SUNCTL */
for (i = aPos->mStartOffset -1 - mContentOffset; i >=0; i--){
if ((ip[i] < ip[aPos->mStartOffset - mContentOffset]) &&
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset])))
{
aPos->mContentOffset = i + mContentOffset;
break;
}
}
#ifdef SUNCTL
}
else {
if (aPos->mStartOffset < 1) {
// go to prev
i = -1;
} else {
PRInt32 mPreviousOffset;
mCtlObj->PrevCluster(NS_REINTERPRET_CAST(const PRUnichar*, paintBuffer.mBuffer),
textLength,aPos->mStartOffset,
&mPreviousOffset);
aPos->mContentOffset = i = mPreviousOffset;
}
}
#endif /* SUNCTL */
if (i <0){
found = PR_FALSE;
GetPrevInFlow(&frameUsed);
start = mContentOffset;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
#ifdef IBMBIDI // Simon, as above
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
((aPos->mDirection == eDirPrevious) && isOddLevel) ){
#else
else if (aPos->mDirection == eDirNext){
#endif
PRInt32 i;
aPos->mContentOffset = mContentLength;
#ifdef SUNCTL
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
nsCOMPtr<nsILE> mCtlObj;
mCtlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
mCtlObj = nsnull;
#endif /* SUNCTL */
for (i = aPos->mStartOffset +1 - mContentOffset; i <= mContentLength; i++){
if ((ip[i] > ip[aPos->mStartOffset - mContentOffset]) &&
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset])))
{
aPos->mContentOffset = i + mContentOffset;
break;
}
}
#ifdef SUNCTL
}
else {
if (aPos->mStartOffset >= textLength) {
// go to next
i = mContentLength + 1;
} else {
PRInt32 mNextOffset;
mCtlObj->NextCluster(NS_REINTERPRET_CAST(const PRUnichar*, paintBuffer.mBuffer),
textLength, aPos->mStartOffset,
&mNextOffset);
aPos->mContentOffset = i = mNextOffset;
}
}
#endif /* SUNCTL */
/* if (aStartOffset == 0 && (mState & TEXT_SKIP_LEADING_WS))
i--; //back up because we just skipped over some white space. why skip over the char also?
*/
if (i > mContentLength){
found = PR_FALSE;
GetNextInFlow(&frameUsed);
start = mContentOffset + mContentLength;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
if (!found)
{
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
{
result = aPos->mResultFrame->PeekOffset(aPresContext, aPos);
if (NS_FAILED(result))
return result;
}
}
else
aPos->mResultContent = mContent;
}
break;
case eSelectWord:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsCOMPtr<nsIWordBreaker> wb;
doc->GetWordBreaker(getter_AddRefs(wb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, wb, aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsIFrame *frameUsed = nsnull;
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start;
PRBool found = PR_FALSE;
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
// so that right arrow always moves to the right on screen
// and left arrow always moves left
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
((aPos->mDirection == eDirNext) && isOddLevel) ) {
#else
if (aPos->mDirection == eDirPrevious){
#endif
keepSearching = PR_TRUE;
tx.Init(this, mContent, aPos->mStartOffset);
aPos->mContentOffset = mContentOffset;//initialize
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
if (tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace,
PR_FALSE) &&
(aPos->mStartOffset - contentLen >= mContentOffset) ){
if ((aPos->mEatingWS && !isWhitespace) || !aPos->mEatingWS){
aPos->mContentOffset = aPos->mStartOffset - contentLen;
//check for whitespace next.
if (isWhitespace && aPos->mContentOffset <= mContentOffset)
{
keepSearching = PR_FALSE;//reached the beginning of a word
aPos->mEatingWS = PR_FALSE;//if no real word then
}
else{
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
while (isWhitespace &&
tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen,
&isWhitespace, PR_FALSE)){
aPos->mContentOffset -= contentLen;
aPos->mEatingWS = PR_TRUE;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
}
aPos->mEatingWS = !isWhitespace;//nowhite space, just eat chars.
keepSearching = aPos->mContentOffset <= mContentOffset;
if (!isWhitespace){
if (!keepSearching)
found = PR_TRUE;
else
aPos->mEatingWS = PR_TRUE;
}
}
}
else {
aPos->mContentOffset = mContentLength + mContentOffset;
found = PR_TRUE;
}
}
}
#ifdef IBMBIDI // Simon, as above
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
((aPos->mDirection == eDirPrevious) && isOddLevel) ) {
#else
else if (aPos->mDirection == eDirNext) {
#endif
tx.Init(this, mContent, aPos->mStartOffset );
aPos->mContentOffset = mContentOffset + mContentLength;//initialize
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
if (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE) &&
(aPos->mStartOffset + contentLen <= (mContentLength + mContentOffset))){
if ((aPos->mEatingWS && isWhitespace) || !aPos->mEatingWS){
aPos->mContentOffset = aPos->mStartOffset + contentLen;
// check for whitespace next. On some platforms (mac), we want the selection to end
// at the end of the word (not the beginning of the next one), so don't slurp up any extra whitespace.
if ( sWordSelectEatSpaceAfter ) {
keepSearching = PR_TRUE;
aPos->mEatingWS = PR_TRUE;
if (!isWhitespace){
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI)
? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
while (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE))
{
if (aPos->mStartOffset + contentLen > (mContentLength + mContentOffset))
goto TryNextFrame;
if (isWhitespace)
aPos->mContentOffset += contentLen;
else
break;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI)
? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
}
keepSearching = PR_FALSE;
found = PR_TRUE;
}
else //we just need to jump the space, done here
{
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI)
? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
while(tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE))
{
if (aPos->mStartOffset + contentLen > (mContentLength + mContentOffset))
goto TryNextFrame;
if (isWhitespace)
aPos->mContentOffset += contentLen;
else
break;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
}
keepSearching = PR_FALSE;
found = PR_TRUE;
}
} // if we should eat space to the next word
else {
keepSearching = PR_FALSE;
found = PR_TRUE;
}
}
else if (aPos->mEatingWS)
{
aPos->mContentOffset = mContentOffset;
found = PR_TRUE;
}
if (!isWhitespace){
aPos->mEatingWS = PR_FALSE;
}
else if (!keepSearching) //we have found the "whole" word so just looking for WS
aPos->mEatingWS = PR_TRUE;
}
TryNextFrame:
GetNextInFlow(&frameUsed);
start = 0;
}
if (!found || (aPos->mContentOffset > (mContentOffset + mContentLength)) || (aPos->mContentOffset < mContentOffset))
{
aPos->mContentOffset = PR_MIN(aPos->mContentOffset, mContentOffset + mContentLength);
aPos->mContentOffset = PR_MAX(aPos->mContentOffset, mContentOffset);
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
{
if (NS_SUCCEEDED(result = aPos->mResultFrame->PeekOffset(aPresContext, aPos)))
return NS_OK;//else fall through
else if (aPos->mDirection == eDirNext)
aPos->mContentOffset = mContentOffset + mContentLength;
else
aPos->mContentOffset = mContentOffset;
}
else
aPos->mResultContent = mContent;
}
else
{
aPos->mResultContent = mContent;
}
}
break;
#ifdef IBMBIDI
case eSelectDir:
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
else {
return result;
}
break;
#endif
default:
result = NS_ERROR_FAILURE; break;
}
aPos->mContentOffsetEnd = aPos->mContentOffset;
if (NS_FAILED(result)){
aPos->mResultContent = mContent;
//aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
aPos->mResultFrame = this;
return result;
}
NS_IMETHODIMP
nsTextFrame::HandleMultiplePress(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
if (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF) {
return NS_OK;
}
nsMouseEvent *me = (nsMouseEvent *)aEvent;
if (!me) return NS_OK;
// Triple- and greater click counts are handled by nsFrame.
if (me->clickCount > 2)
return nsFrame::HandleMultiplePress(aPresContext, aEvent, aEventStatus);
// Double-click: word selection, handled here:
PRInt32 startPos = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
nsresult rv = GetPosition(aPresContext, aEvent->point,
getter_AddRefs(newContent), startPos,
contentOffsetEnd);
if (NS_FAILED(rv))
return rv;
return PeekBackwardAndForward(eSelectWord, eSelectWord, startPos,
aPresContext, PR_FALSE);
}
NS_IMETHODIMP
nsTextFrame::CheckVisibility(nsIPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval)
{
if (!aFinished || !_retval)
return NS_ERROR_NULL_POINTER;
if (*aFinished)
return NS_ERROR_FAILURE; //dont call with finished != false
if (mContentOffset > aEndIndex)
return NS_OK; //reached the end
if (mContentOffset > aStartIndex)
aStartIndex = mContentOffset;
if (aStartIndex >= aEndIndex) //how can it be greater?? check anyway
return NS_OK; //reached the end.
nsresult rv ;
if (aStartIndex < (mContentOffset + mContentLength))
{
//get the presshell
nsCOMPtr<nsIPresShell> shell;
rv = aContext->GetShell(getter_AddRefs(shell));
if (NS_FAILED(rv))
return rv;
if (!shell)
return NS_ERROR_FAILURE;
//get the document
nsCOMPtr<nsIDocument> doc;
rv = shell->GetDocument(getter_AddRefs(doc));
if (NS_FAILED(rv))
return rv;
if (!doc)
return NS_ERROR_FAILURE;
//get the linebreaker
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
//create texttransformer
nsTextTransformer tx(lb, nsnull, aContext);
//create the buffers
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1)))
return NS_ERROR_FAILURE;//bail out
PRInt32 textLength;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength)//we have something to measure?
{
PRInt32 start = PR_MAX(aStartIndex,mContentOffset);
PRInt32 end = PR_MIN(mContentOffset + mContentLength-1, aEndIndex); //base 0 index of array
while (start != end)
{
if (indexBuffer.mBuffer[start] < indexBuffer.mBuffer[start+1]) //we have a rendered char!
{
*aFinished = PR_TRUE;//we are done bubble out.
*_retval = PR_TRUE;//hit a drawn char
return NS_OK;
}
start++;
}
if (start == aEndIndex)
{
*aFinished = PR_TRUE;
}
}
}
if (aRecurse) //recurse through the siblings.
{
nsIFrame *nextInFlow = this;
rv = NS_OK;
while (!aFinished && nextInFlow && NS_SUCCEEDED(rv) && !*_retval) //while we havent found anything visible
{
rv = nextInFlow->GetNextInFlow(&nextInFlow);
if (nextInFlow)
{
rv = nextInFlow->CheckVisibility(aContext,aStartIndex,aEndIndex,PR_FALSE,aFinished,_retval);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
{
start = mContentOffset;
end = mContentOffset+mContentLength;
return NS_OK;
}
#define TEXT_MAX_NUM_SEGMENTS 65
struct SegmentData {
PRUint32 mIsWhitespace : 1;
PRUint32 mContentLen : 31; // content length
PRBool IsWhitespace() {return PRBool(mIsWhitespace);}
// Get the content length. This is a running total of all
// the previous segments as well
PRInt32 ContentLen() {return PRInt32(mContentLen);}
};
struct TextRun {
// Total number of characters and the accumulated content length
PRInt32 mTotalNumChars, mTotalContentLen;
// Words and whitespace each count as a segment
PRInt32 mNumSegments;
// Possible break points specified as offsets into the buffer
PRInt32 mBreaks[TEXT_MAX_NUM_SEGMENTS];
// Per segment data
SegmentData mSegments[TEXT_MAX_NUM_SEGMENTS];
TextRun()
{
Reset();
}
void Reset()
{
mNumSegments = 0;
mTotalNumChars = 0;
mTotalContentLen = 0;
}
// Returns PR_TRUE if we're currently buffering text
PRBool IsBuffering()
{
return mNumSegments > 0;
}
void AddSegment(PRInt32 aNumChars, PRInt32 aContentLen, PRBool aIsWhitespace)
{
NS_PRECONDITION(mNumSegments < TEXT_MAX_NUM_SEGMENTS, "segment overflow");
#ifdef IBMBIDI
if (mNumSegments >= TEXT_MAX_NUM_SEGMENTS) {
return;
}
#endif // IBMBIDI
mTotalNumChars += aNumChars;
mBreaks[mNumSegments] = mTotalNumChars;
mSegments[mNumSegments].mIsWhitespace = aIsWhitespace;
mTotalContentLen += aContentLen;
mSegments[mNumSegments].mContentLen = PRUint32(mTotalContentLen);
mNumSegments++;
}
};
// Transforms characters in place from ascii to Unicode
static void
TransformTextToUnicode(char* aText, PRInt32 aNumChars)
{
// Go backwards over the characters and convert them.
unsigned char* cp1 = (unsigned char*)aText + aNumChars - 1;
PRUnichar* cp2 = (PRUnichar*)aText + (aNumChars - 1);
while (aNumChars-- > 0) {
// XXX: If you crash here then you may see the issue described
// in http://bugzilla.mozilla.org/show_bug.cgi?id=36146#c44
*cp2-- = PRUnichar(*cp1--);
}
}
PRUint32
nsTextFrame::EstimateNumChars(PRUint32 aAvailableWidth,
PRUint32 aAverageCharWidth)
{
// Estimate the number of characters that will fit. Use 105% of the available
// width divided by the average character width.
// If mAveCharWidth is zero, we can fit the entire line.
if (aAverageCharWidth == 0) {
return PR_UINT32_MAX;
}
PRUint32 estimatedNumChars = aAvailableWidth / aAverageCharWidth;
return estimatedNumChars + estimatedNumChars / 20;
}
static PRBool
IsPunctuationMark(PRUnichar aChar)
{
//The following table is generated by a method written by Ftang, see bug 54467.
//In case we need to add or substract any character (for example, unicode standard got
// updated), the character in table must be kept in strict ascending order
static PRUnichar PuncSet[] =
{
0x0021, 0x0022, 0x0023, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029,
0x002A, 0x002C, 0x002E, 0x002F, 0x003A, 0x003B, 0x003F, 0x0040,
0x005B, 0x005C, 0x005D, 0x007B, 0x007D, 0x00A1, 0x00B7, 0x00BF,
0x0313, 0x037E, 0x0387, 0x055A, 0x055B, 0x055C, 0x055D, 0x055E,
0x055F, 0x0589, 0x05BE, 0x05C0, 0x05C3, 0x05F3, 0x05F4, 0x060C,
0x061B, 0x061F, 0x066A, 0x066B, 0x066C, 0x066D, 0x06D4, 0x0700,
0x0701, 0x0702, 0x0703, 0x0704, 0x0705, 0x0706, 0x0707, 0x0708,
0x0709, 0x070A, 0x070B, 0x070C, 0x070D, 0x0964, 0x0965, 0x0970,
0x0DF4, 0x0E4F, 0x0E5A, 0x0E5B, 0x0F04, 0x0F05, 0x0F06, 0x0F07,
0x0F08, 0x0F09, 0x0F0A, 0x0F0B, 0x0F0C, 0x0F0D, 0x0F0E, 0x0F0F,
0x0F10, 0x0F11, 0x0F12, 0x0F3A, 0x0F3B, 0x0F3C, 0x0F3D, 0x0F85,
0x104A, 0x104B, 0x104C, 0x104D, 0x104E, 0x104F, 0x10FB, 0x1361,
0x1362, 0x1363, 0x1364, 0x1365, 0x1366, 0x1367, 0x1368, 0x166D,
0x166E, 0x169B, 0x169C, 0x16EB, 0x16EC, 0x16ED, 0x17D4, 0x17D5,
0x17D6, 0x17D7, 0x17D8, 0x17D9, 0x17DA, 0x17DC, 0x1800, 0x1801,
0x1802, 0x1803, 0x1804, 0x1805, 0x1807, 0x1808, 0x1809, 0x180A,
0x2016, 0x2017, 0x201A, 0x201E, 0x2020, 0x2021, 0x2022, 0x2023,
0x2024, 0x2025, 0x2026, 0x2027, 0x2030, 0x2031, 0x2032, 0x2033,
0x2034, 0x2035, 0x2036, 0x2037, 0x2038, 0x203B, 0x203C, 0x203D,
0x203E, 0x2041, 0x2042, 0x2043, 0x2045, 0x2046, 0x2048, 0x2049,
0x204A, 0x204B, 0x204C, 0x204D, 0x207D, 0x207E, 0x208D, 0x208E,
0x2329, 0x232A, 0x3001, 0x3002, 0x3003, 0x3008, 0x3009, 0x300A,
0x300B, 0x300C, 0x300D, 0x300E, 0x300F, 0x3010, 0x3011, 0x3014,
0x3015, 0x3016, 0x3017, 0x3018, 0x3019, 0x301A, 0x301B, 0x301D,
0x301E, 0x301F, 0xFD3E, 0xFD3F, 0xFE30, 0xFE35, 0xFE36, 0xFE37,
0xFE38, 0xFE39, 0xFE3A, 0xFE3B, 0xFE3C, 0xFE3D, 0xFE3E, 0xFE3F,
0xFE40, 0xFE41, 0xFE42, 0xFE43, 0xFE44, 0xFE49, 0xFE4A, 0xFE4B,
0xFE4C, 0xFE50, 0xFE51, 0xFE52, 0xFE54, 0xFE55, 0xFE56, 0xFE57,
0xFE59, 0xFE5A, 0xFE5B, 0xFE5C, 0xFE5D, 0xFE5E, 0xFE5F, 0xFE60,
0xFE61, 0xFE68, 0xFE6A, 0xFE6B, 0xFF01, 0xFF02, 0xFF03, 0xFF05,
0xFF06, 0xFF07, 0xFF08, 0xFF09, 0xFF0A, 0xFF0C, 0xFF0E, 0xFF0F,
0xFF1A, 0xFF1B, 0xFF1F, 0xFF20, 0xFF3B, 0xFF3C, 0xFF3D, 0xFF5B,
0xFF5D, 0xFF61, 0xFF62, 0xFF63, 0xFF64,
};
static PRInt32 PuncSetSize = sizeof(PuncSet) / sizeof(PuncSet[0]);
PRInt32 i = PuncSetSize/2, begin = 0, end = PuncSetSize -1;
for (; begin != end; i = (begin + end ) / 2)
{
if (aChar == PuncSet[i])
return PR_TRUE;
if (aChar > PuncSet[i])
begin = i+1;
else
end = i;
}
return (aChar == PuncSet[i]);
}
nsReflowStatus
nsTextFrame::MeasureText(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsTextTransformer& aTx,
nsILineBreaker* aLb,
TextStyle& aTs,
TextReflowData& aTextData)
{
PRBool firstThing = PR_TRUE;
nscoord maxWidth = aReflowState.availableWidth;
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
PRInt32 contentLength = aTx.GetContentLength();
PRInt32 startingOffset = aTextData.mOffset;
PRInt32 prevOffset = -1;
PRInt32 column = mColumn;
PRInt32 prevColumn = column;
nscoord prevMaxWordWidth = 0, prevAscent = 0, prevDescent = 0;
PRInt32 lastWordLen = 0;
PRUnichar* lastWordPtr = nsnull;
PRBool textStartsWithNBSP = PR_FALSE;
PRBool endsInWhitespace = PR_FALSE;
PRBool endsInNewline = PR_FALSE;
PRBool justDidFirstLetter = PR_FALSE;
nsTextDimensions dimensions, lastWordDimensions;
PRBool measureTextRuns = PR_FALSE;
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11)
// see if we have implementation for GetTextDimensions()
PRUint32 hints = 0;
aReflowState.rendContext->GetHints(hints);
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
measureTextRuns = !aTextData.mComputeMaxWordWidth && !aTs.mPreformatted &&
!aTs.mSmallCaps && !aTs.mWordSpacing && !aTs.mLetterSpacing &&
aTextData.mWrapping;
}
// Don't measure text runs with letter spacing active, it doesn't work
// it also doesn't work if we are not word-wrapping (bug 42832)
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) */
TextRun textRun;
PRUint32 estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
aTs.mAveCharWidth);
#ifdef IBMBIDI
nsTextFrame* nextBidi = nsnull;
PRInt32 start = -1, end;
if (mState & NS_FRAME_IS_BIDI) {
GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi, (void**) &nextBidi,sizeof(nextBidi));
if (nextBidi) {
if (mContentLength < 1) {
mContentLength = 1;
}
nextBidi->GetOffsets(start, end);
if (start <= mContentOffset) {
nextBidi->SetOffsets(mContentOffset + mContentLength, end);
nsFrameState frameState;
nextBidi->GetFrameState(&frameState);
frameState |= NS_FRAME_IS_BIDI;
nextBidi->SetFrameState(frameState);
}
else {
mContentLength = start - mContentOffset;
}
}
}
#endif //IBMBIDI
aTextData.mX = 0;
if (aTextData.mMeasureText) {
aTs.mNormalFont->GetMaxAscent(aTextData.mAscent);
aTs.mNormalFont->GetMaxDescent(aTextData.mDescent);
}
PRBool firstWordDone = PR_FALSE;
for (;;firstThing = PR_FALSE) {
#ifdef IBMBIDI
if (nextBidi && (mContentLength <= 0) ) {
if (textRun.IsBuffering()) {
// Measure the remaining text
goto MeasureTextRun;
}
else {
break;
}
}
#endif // IBMBIDI
// Get next word/whitespace from the text
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
union {
char* bp1;
PRUnichar* bp2;
};
#ifdef IBMBIDI
wordLen = start;
#endif // IBMBIDI
// We need to set aTextData.mCanBreakBefore to true after 1st word. But we can't set
// aTextData.mCanBreakBefore without seeing the 2nd word. That's because this frame
// may only contain part of one word, the other part is in next frame.
// we don't care if first word is whitespace, that will be addressed later.
if (!aTextData.mCanBreakBefore && !firstThing && !isWhitespace) {
firstWordDone = PR_TRUE;
}
bp2 = aTx.GetNextWord(aTextData.mInWord, &wordLen, &contentLen, &isWhitespace,
&wasTransformed, textRun.mNumSegments == 0);
#ifdef IBMBIDI
if (nextBidi) {
mContentLength -= contentLen;
if (mContentLength < 0) {
contentLen += mContentLength;
wordLen = PR_MIN(wordLen, contentLen);
}
}
#endif // IBMBIDI
// Remember if the text was transformed
if (wasTransformed) {
mState |= TEXT_WAS_TRANSFORMED;
}
if (bp2) {
if (firstWordDone) {
// The first word has been processed, and 2nd word is seen
// we can set it be breakable here after.
aTextData.mCanBreakBefore = PR_TRUE;
}
} else {
if (textRun.IsBuffering()) {
// Measure the remaining text
goto MeasureTextRun;
}
else {
// Advance the offset in case we just consumed a bunch of
// discarded characters. Otherwise, if this is the first piece
// of content for this frame we will attempt to break-before it.
aTextData.mOffset += contentLen;
break;
}
}
lastWordLen = wordLen;
lastWordPtr = bp2;
aTextData.mInWord = PR_FALSE;
// Measure the word/whitespace
PRUnichar firstChar;
if (aTx.TransformedTextIsAscii()) {
firstChar = *bp1;
} else {
firstChar = *bp2;
}
if (isWhitespace) {
if ('\n' == firstChar) {
// We hit a newline. Stop looping.
NS_WARN_IF_FALSE(aTs.mPreformatted, "newline w/o ts.mPreformatted");
prevOffset = aTextData.mOffset;
aTextData.mOffset++;
endsInWhitespace = PR_TRUE;
endsInNewline = PR_TRUE;
break;
}
if (aTextData.mSkipWhitespace) {
aTextData.mOffset += contentLen;
aTextData.mSkipWhitespace = PR_FALSE;
if (wasTransformed) {
// As long as there were no discarded characters, then don't consider
// skipped leading whitespace as being transformed
if (wordLen == contentLen) {
mState &= ~TEXT_WAS_TRANSFORMED;
}
}
// Only set flag when we actually do skip whitespace
mState |= TEXT_SKIP_LEADING_WS;
continue;
}
// NOTE: Even if the textRun absorbs the whitespace below, we still
// want to remember that we're breakable.
aTextData.mCanBreakBefore = PR_TRUE;
aTextData.mFirstLetterOK = PR_FALSE;
if ('\t' == firstChar) {
// Expand tabs to the proper width
wordLen = 8 - (7 & column);
// Apply word spacing to every space derived from a tab
dimensions.width = (aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing)*wordLen;
// Because we have to expand the tab when rendering consider that
// a transformation of the text
mState |= TEXT_WAS_TRANSFORMED;
}
else if (textRun.IsBuffering()) {
// Add a whitespace segment
textRun.AddSegment(wordLen, contentLen, PR_TRUE);
continue;
}
else {
// Apply word spacing to every space, if there's more than one
dimensions.width = wordLen*(aTs.mWordSpacing + aTs.mLetterSpacing + aTs.mSpaceWidth);// XXX simplistic
}
//Even if there is not enough space for this "space", we still put it
//here instead of next line
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_TRUE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (aTextData.mMeasureText) {
//if we're wrapping, then don't add the whitespace width to the
// x-offset unless the whitespace will fit within maxWidth.''
if (aTextData.mWrapping) {
if (aTextData.mX + dimensions.width <= maxWidth) {
aTextData.mX += dimensions.width;
}
else {
// since we didn't add the trailing space width, set this flag so that
// we will not trim this non-existing space
aTextData.mTrailingSpaceTrimmed = PR_TRUE;
break;
}
}
else {
//if we're not wrapping, then always advance
// the x-offset regardless of maxWidth
aTextData.mX += dimensions.width;
}
} //(aTextData.mMeasureText)
}
else {
// See if the first thing in the section of text is a
// non-breaking space (html nbsp entity). If it is then make
// note of that fact for the line layout logic.
if (aTextData.mWrapping && firstThing && (firstChar == ' ')) {
textStartsWithNBSP = PR_TRUE;
}
aTextData.mSkipWhitespace = PR_FALSE;
if (aTextData.mFirstLetterOK) {
if (IsPunctuationMark(firstChar)) {
if (contentLen > 1)
{
wordLen = 2;
contentLen = 2;
}
}
else {
wordLen = 1;
contentLen = 1;
}
justDidFirstLetter = PR_TRUE;
}
if (aTextData.mMeasureText) {
if (measureTextRuns && !justDidFirstLetter) {
// Add another word to the text run
textRun.AddSegment(wordLen, contentLen, PR_FALSE);
// See if we should measure the text
if ((textRun.mTotalNumChars >= estimatedNumChars) ||
(textRun.mNumSegments >= (TEXT_MAX_NUM_SEGMENTS - 1))) {
goto MeasureTextRun;
}
}
else {
if (aTs.mSmallCaps) {
MeasureSmallCapsText(aReflowState, aTs, bp2, wordLen, &dimensions);
}
else {
// Measure just the one word
if (aTx.TransformedTextIsAscii()) {
aReflowState.rendContext->GetTextDimensions(bp1, wordLen, dimensions);
} else {
aReflowState.rendContext->GetTextDimensions(bp2, wordLen, dimensions);
}
if (aTs.mLetterSpacing) {
dimensions.width += aTs.mLetterSpacing * wordLen;
}
}
lastWordDimensions = dimensions;
// See if there is room for the text
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
// The text will not fit.
break;
}
prevMaxWordWidth = aTextData.mMaxWordWidth;
prevAscent = aTextData.mAscent;
prevDescent = aTextData.mDescent;
aTextData.mX += dimensions.width;
if (dimensions.width > aTextData.mMaxWordWidth) {
aTextData.mMaxWordWidth = dimensions.width;
}
if (aTextData.mAscent < dimensions.ascent) {
aTextData.mAscent = dimensions.ascent;
}
if (aTextData.mDescent < dimensions.descent) {
aTextData.mDescent = dimensions.descent;
}
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_FALSE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (justDidFirstLetter) {
// Time to stop
break;
}
}
}
else {
// We didn't measure the text, but we need to update our state
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_FALSE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (justDidFirstLetter) {
// Time to stop
break;
}
}
}
continue;
MeasureTextRun:
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11)
// see if we have implementation for GetTextDimensions()
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
PRInt32 numCharsFit;
// These calls can return numCharsFit not positioned at a break in the textRun. Beware.
if (aTx.TransformedTextIsAscii()) {
aReflowState.rendContext->GetTextDimensions((char*)aTx.GetWordBuffer(), textRun.mTotalNumChars,
maxWidth - aTextData.mX,
textRun.mBreaks, textRun.mNumSegments,
dimensions, numCharsFit, lastWordDimensions);
} else {
aReflowState.rendContext->GetTextDimensions(aTx.GetWordBuffer(), textRun.mTotalNumChars,
maxWidth - aTextData.mX,
textRun.mBreaks, textRun.mNumSegments,
dimensions, numCharsFit, lastWordDimensions);
}
// See how much of the text fit
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
// None of the text fits
#ifdef IBMBIDI
nextBidi = nsnull;
#endif // IBMBIDI
break;
}
// Find the index of the last segment that fit
PRInt32 lastSegment;
if (numCharsFit >= textRun.mTotalNumChars) { // fast path, normal case
NS_ASSERTION(numCharsFit == textRun.mTotalNumChars, "shouldn't overshoot");
lastSegment = textRun.mNumSegments - 1;
} else {
for (lastSegment = 0; textRun.mBreaks[lastSegment] < numCharsFit; lastSegment++) ;
NS_ASSERTION(lastSegment < textRun.mNumSegments, "failed to find segment");
// now we have textRun.mBreaks[lastSegment] >= numCharsFit
/* O'Callahan XXX: This snippet together with the snippet below prevents mail from loading
Justification seems to work just fine without these changes.
We get into trouble in a case where lastSegment gets set to -1
if (textRun.mBreaks[lastSegment] > numCharsFit) {
// NOTE: this segment did not actually fit!
lastSegment--;
}
*/
}
/* O'Callahan XXX: This snippet together with the snippet above prevents mail from loading
if (lastSegment < 0) {
// no segments fit
break;
} else */
if (lastSegment == 0) {
// Only one segment fit
prevColumn = column;
prevOffset = aTextData.mOffset;
} else {
// The previous state is for the next to last word
// NOTE: The textRun data are relative to the last updated column and offset!
prevColumn = column + textRun.mBreaks[lastSegment - 1];
prevOffset = aTextData.mOffset + textRun.mSegments[lastSegment - 1].ContentLen();
}
aTextData.mX += dimensions.width;
if (aTextData.mAscent < dimensions.ascent) {
aTextData.mAscent = dimensions.ascent;
}
if (aTextData.mDescent < dimensions.descent) {
aTextData.mDescent = dimensions.descent;
}
// this is where to backup if line-breaking happens to push the last word
prevAscent = aTextData.mAscent;
prevDescent = aTextData.mDescent;
// we can now consider the last word since we know where to backup
if (aTextData.mAscent < lastWordDimensions.ascent) {
aTextData.mAscent = lastWordDimensions.ascent;
}
if (aTextData.mDescent < lastWordDimensions.descent) {
aTextData.mDescent = lastWordDimensions.descent;
}
column += numCharsFit;
aTextData.mOffset += textRun.mSegments[lastSegment].ContentLen();
endsInWhitespace = textRun.mSegments[lastSegment].IsWhitespace();
// If all the text didn't fit, then we're done
if (numCharsFit != textRun.mTotalNumChars) {
#ifdef IBMBIDI
nextBidi = nsnull;
#endif // IBMBIDI
break;
}
#ifdef IBMBIDI
if (nextBidi && (mContentLength <= 0) ) {
break;
}
#endif // IBMBIDI
if (nsnull == bp2) {
// No more text so we're all finished. Advance the offset in case the last
// call to GetNextWord() discarded characters
aTextData.mOffset += contentLen;
break;
}
// Reset the number of text run segments
textRun.Reset();
// Estimate the remaining number of characters we think will fit
estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
aTs.mAveCharWidth);
}
#else /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) */
int unused = -1;
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) */
}
// If we didn't actually measure any text, then make sure it looks
// like we did
if (!aTextData.mMeasureText) {
aTextData.mAscent = mAscent;
aTextData.mDescent = mRect.height - aTextData.mAscent;
aTextData.mX = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
// Add back in the width of a space since it was trimmed away last time
// NOTE: Trailing whitespace includes word and letter spacing!
aTextData.mX += aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing;
}
}
// Post processing logic to deal with word-breaking that spans
// multiple frames.
if (lineLayout.InWord()) {
// We are already in a word. This means a text frame prior to this
// one had a fragment of a nbword that is joined with this
// frame. It also means that the prior frame already found this
// frame and recorded it as part of the word.
#ifdef DEBUG_WORD_WRAPPING
ListTag(stdout);
printf(": in word; skipping\n");
#endif
lineLayout.ForgetWordFrame(this);
}
if (!lineLayout.InWord()) {
// There is no currently active word. This frame may contain the
// start of one.
if (endsInWhitespace) {
// Nope, this frame doesn't start a word.
lineLayout.ForgetWordFrames();
}
else if ((aTextData.mOffset == contentLength) && (prevOffset >= 0)) {
// Force breakable to false when we aren't wrapping (this
// guarantees that the combined word will stay together)
if (!aTextData.mWrapping) {
aTextData.mCanBreakBefore = PR_FALSE;
}
// This frame does start a word. However, there is no point
// messing around with it if we are already out of room. We
// always have room if we are not breakable.
if (!aTextData.mCanBreakBefore || (aTextData.mX <= maxWidth)) {
// There is room for this word fragment. It's possible that
// this word fragment is the end of the text-run. If it's not
// then we continue with the look-ahead processing.
nsIFrame* next = lineLayout.FindNextText(aPresContext, this);
if (nsnull != next) {
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(aTx.GetWordBuffer(), lastWordLen);
ListTag(stdout);
printf(": start='");
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
printf("' lastWordLen=%d baseWidth=%d prevOffset=%d offset=%d next=",
lastWordLen, lastWordDimensions.width, prevOffset, aTextData.mOffset);
ListTag(stdout, next);
printf("\n");
#endif
PRUnichar* pWordBuf = lastWordPtr;
PRUint32 wordBufLen = aTx.GetWordBufferLength() -
(lastWordPtr - aTx.GetWordBuffer());
if (aTx.TransformedTextIsAscii()) {
// The text transform buffer contains ascii characters, so
// transform it to Unicode
NS_ASSERTION(wordBufLen >= PRUint32(lastWordLen), "no room to transform in place");
TransformTextToUnicode((char*)lastWordPtr, lastWordLen);
}
// Look ahead in the text-run and compute the final word
// width, taking into account any style changes and stopping
// at the first breakable point.
if (!aTextData.mMeasureText || (lastWordDimensions.width == -1)) {
// We either didn't measure any text or we measured multiple words
// at once so either way we don't know lastWordDimensions. We'll have to
// compute it now
if (prevOffset == startingOffset) {
// There's only one word, so we don't have to measure after all
lastWordDimensions.width = aTextData.mX;
}
else if (aTs.mSmallCaps) {
MeasureSmallCapsText(aReflowState, aTs, pWordBuf,
lastWordLen, &lastWordDimensions);
}
else {
aReflowState.rendContext->GetTextDimensions(pWordBuf, lastWordLen, lastWordDimensions);
if (aTs.mLetterSpacing) {
lastWordDimensions.width += aTs.mLetterSpacing * lastWordLen;
}
}
}
nsTextDimensions wordDimensions = ComputeTotalWordDimensions(aPresContext, aLb,
lineLayout,
aReflowState, next,
lastWordDimensions,
pWordBuf,
lastWordLen,
wordBufLen,
aTextData.mCanBreakBefore);
if (!aTextData.mCanBreakBefore || (aTextData.mX - lastWordDimensions.width + wordDimensions.width <= maxWidth)) {
// The fully joined word has fit. Account for the joined
// word's affect on the max-element-size here (since the
// joined word is large than it's pieces, the right effect
// will occur from the perspective of the container
// reflowing this frame)
if (wordDimensions.width > aTextData.mMaxWordWidth) {
aTextData.mMaxWordWidth = wordDimensions.width;
}
// Now that we now that we will retain the last word, we should
// account for its ascent and descent
if (aTextData.mAscent < lastWordDimensions.ascent) {
aTextData.mAscent = lastWordDimensions.ascent;
}
if (aTextData.mDescent < lastWordDimensions.descent) {
aTextData.mDescent = lastWordDimensions.descent;
}
}
else {
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": look-ahead (didn't fit) x=%d wordWidth=%d lastWordWidth=%d\n",
aTextData.mX, wordDimensions.width, lastWordDimensions.width);
#endif
// The fully joined word won't fit. We need to reduce our
// size by lastWordDimensions
aTextData.mX -= lastWordDimensions.width;
aTextData.mMaxWordWidth = prevMaxWordWidth;
aTextData.mOffset = prevOffset;
column = prevColumn;
if (aTextData.mMeasureText) {
aTextData.mAscent = prevAscent;
aTextData.mDescent = prevDescent;
}
// else {
// XXX we didn't measure the text, and so we don't know where to back up,
// we will retain our current height. However, there is a possible
// edge case that is not handled: since we just chopped the last word,
// our remaining text could have got shorter.
// }
#ifdef DEBUG_WORD_WRAPPING
printf(" x=%d maxWordWidth=%d len=%d\n", aTextData.mX, aTextData.mMaxWordWidth,
aTextData.mOffset - startingOffset);
#endif
lineLayout.ForgetWordFrames();
}
}
}
}
}
// Inform line layout of how this piece of text ends in whitespace
// (only text objects do this). Note that if x is zero then this
// text object collapsed into nothingness which means it shouldn't
// effect the current setting of the ends-in-whitespace flag.
lineLayout.SetColumn(column);
lineLayout.SetUnderstandsWhiteSpace(PR_TRUE);
lineLayout.SetTextStartsWithNBSP(textStartsWithNBSP);
if (0 != aTextData.mX) {
lineLayout.SetEndsInWhiteSpace(endsInWhitespace);
}
if (justDidFirstLetter) {
lineLayout.SetFirstLetterFrame(this);
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
mState |= TEXT_FIRST_LETTER;
}
// Return our reflow status
nsReflowStatus rs = (aTextData.mOffset == contentLength)
#ifdef IBMBIDI
|| (aTextData.mOffset == start)
#endif // IBMBIDI
? NS_FRAME_COMPLETE
: NS_FRAME_NOT_COMPLETE;
if (endsInNewline) {
rs = NS_INLINE_LINE_BREAK_AFTER(rs);
}
else if ((aTextData.mOffset != contentLength) && (aTextData.mOffset == startingOffset)) {
// Break-before a long-word that doesn't fit here
rs = NS_INLINE_LINE_BREAK_BEFORE();
}
return rs;
}
NS_IMETHODIMP
nsTextFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTextFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": BeginReflow: availableSize=%d,%d\n",
aReflowState.availableWidth, aReflowState.availableHeight);
#endif
// XXX If there's no line layout, we shouldn't even have created this
// frame. This may happen if, for example, this is text inside a table
// but not inside a cell. For now, just don't reflow.
if (nsnull == aReflowState.mLineLayout) {
// XXX Add a method to aMetrics that does this; we do it several places
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = 0;
aMetrics.maxElementSize->height = 0;
}
#ifdef MOZ_MATHML
if (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags)
aMetrics.mBoundingMetrics.Clear();
#endif
return NS_OK;
}
// Get starting offset into the content
PRInt32 startingOffset = 0;
nsIFrame* prevInFlow;
GetPrevInFlow(&prevInFlow);
if (nsnull != prevInFlow) {
nsTextFrame* prev = (nsTextFrame*)prevInFlow;
startingOffset = prev->mContentOffset + prev->mContentLength;
// If our starting offset doesn't agree with mContentOffset, then our
// prev-in-flow has changed the number of characters it maps and so we
// need to measure text and not try and optimize a resize reflow
if (startingOffset != mContentOffset) {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
}
#ifdef IBMBIDI
if ( (mContentLength > 0) && (mState & NS_FRAME_IS_BIDI) ) {
startingOffset = mContentOffset;
}
PRBool bidiEnabled;
aPresContext->GetBidiEnabled(&bidiEnabled);
if (bidiEnabled) {
nsCharType charType = eCharType_LeftToRight;
PRUint32 hints = 0;
aReflowState.rendContext->GetHints(hints);
GetBidiProperty(aPresContext, nsLayoutAtoms::charType, (void**)&charType, sizeof(charType));
PRBool isBidiSystem = (eCharType_RightToLeftArabic == charType) ?
(hints & NS_RENDERING_HINT_ARABIC_SHAPING) :
(hints & NS_RENDERING_HINT_BIDI_REORDERING);
aPresContext->SetIsBidiSystem(isBidiSystem);
}
#endif //IBMBIDI
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
TextStyle ts(aPresContext, *aReflowState.rendContext, mStyleContext);
// Clear out the reflow state flags in mState (without destroying
// the TEXT_BLINK_ON bit).
PRBool lastTimeWeSkippedLeadingWS = 0 != (mState & TEXT_SKIP_LEADING_WS);
mState &= ~TEXT_REFLOW_FLAGS;
if (aReflowState.mFlags.mBlinks) {
if (0 == (mState & TEXT_BLINK_ON)) {
mState |= TEXT_BLINK_ON;
nsBlinkTimer::AddBlinkFrame(aPresContext, this);
}
}
else {
if (0 != (mState & TEXT_BLINK_ON)) {
mState &= ~TEXT_BLINK_ON;
nsBlinkTimer::RemoveBlinkFrame(this);
}
}
PRBool wrapping = (NS_STYLE_WHITESPACE_NORMAL == ts.mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == ts.mText->mWhiteSpace);
// Set whitespace skip flag
PRBool skipWhitespace = PR_FALSE;
if (!ts.mPreformatted) {
if (lineLayout.GetEndsInWhiteSpace()) {
skipWhitespace = PR_TRUE;
}
}
nscoord maxWidth = aReflowState.availableWidth;
// Setup text transformer to transform this frames text content
nsCOMPtr<nsIDocument> doc;
mContent->GetDocument(*getter_AddRefs(doc));
if (!doc) {
NS_WARNING("Content has no document.");
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull, aPresContext);
// Keep the text in ascii if possible. Note that if we're measuring small
// caps text then transform to Unicode because the helper function only
// accepts Unicode text
nsresult rv = tx.Init(this, mContent, startingOffset, !ts.mSmallCaps);
if (NS_OK != rv) {
return rv;
}
//PRInt32 contentLength = tx.GetContentLength();
// Set inWord to true if we are part of a previous piece of text's word. This
// is only valid for one pass through the measuring loop.
PRBool inWord = lineLayout.InWord() || ((nsnull != prevInFlow) && (((nsTextFrame*)prevInFlow)->mState & TEXT_FIRST_LETTER));
if (inWord) {
mState |= TEXT_IN_WORD;
}
mState &= ~TEXT_FIRST_LETTER;
PRInt32 column = lineLayout.GetColumn();
PRInt32 prevColumn = mColumn;
mColumn = column;
PRBool measureText = PR_TRUE;
// We can avoid actually measuring the text if:
// - this is a resize reflow
// - we're not dirty (see ContentChanged() function)
// - we don't have a next in flow
// - the previous reflow successfully reflowed all text in the
// available space
// - we aren't computing the max element size (that requires we measure
// text)
// - skipping leading whitespace is the same as it was the last time
// - we're wrapping text and the available width is at least as big as our
// current frame width -or-
// we're not wrapping text and we're at the same column as before (this is
// an issue for preformatted tabbed text only)
// - AND we aren't justified (in which case the frame width has already been tweaked and can't be used)
if ((eReflowReason_Resize == aReflowState.reason) &&
(0 == (mState & NS_FRAME_IS_DIRTY))) {
nscoord realWidth = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
// NOTE: Trailing whitespace includes word and letter spacing!
realWidth += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
}
if (!mNextInFlow &&
(mState & TEXT_OPTIMIZE_RESIZE) &&
!aMetrics.maxElementSize &&
(lastTimeWeSkippedLeadingWS == skipWhitespace) &&
((wrapping && (maxWidth >= realWidth)) ||
(!wrapping && (prevColumn == column))) &&
#ifdef IBMBIDI
(0 == (mState & NS_FRAME_IS_BIDI) ) &&
#endif // IBMBIDI
!ts.mJustifying) {
// We can skip measuring of text and use the value from our
// previous reflow
measureText = PR_FALSE;
#ifdef NOISY_REFLOW
printf(" => measureText=%s wrapping=%s skipWhitespace=%s",
measureText ? "yes" : "no",
wrapping ? "yes" : "no",
skipWhitespace ? "yes" : "no");
printf(" realWidth=%d maxWidth=%d\n",
realWidth, maxWidth);
#endif
}
}
// Local state passed to the routines that do the actual text measurement
TextReflowData textData(startingOffset, wrapping, skipWhitespace,
measureText, inWord, lineLayout.GetFirstLetterStyleOK(),
lineLayout.LineIsBreakable(), nsnull != aMetrics.maxElementSize,
PR_FALSE);
// Measure the text
// MeasureText may set TEXT_TRIMMED_WS flag, so don't clear after the call
if (ts.mFont->mSize)
aStatus = MeasureText(aPresContext, aReflowState, tx, lb, ts, textData);
else {
textData.mX = 0;
textData.mAscent = 0;
textData.mDescent = 0;
aStatus = NS_FRAME_COMPLETE;
}
if (textData.mTrailingSpaceTrimmed)
mState |= TEXT_TRIMMED_WS;
else
mState &= ~TEXT_TRIMMED_WS;
if (tx.HasMultibyte()) {
mState |= TEXT_HAS_MULTIBYTE;
}
// Setup metrics for caller; store final max-element-size information
aMetrics.width = textData.mX;
if ((0 == textData.mX) && !ts.mPreformatted) {
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
}
else {
aMetrics.ascent = textData.mAscent;
aMetrics.descent = textData.mDescent;
aMetrics.height = aMetrics.ascent + aMetrics.descent;
}
mAscent = aMetrics.ascent;
if (!wrapping) {
textData.mMaxWordWidth = textData.mX;
}
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = textData.mMaxWordWidth;
aMetrics.maxElementSize->height = aMetrics.height;
}
// Set content offset and length
mContentOffset = startingOffset;
mContentLength = textData.mOffset - startingOffset;
// Compute space and letter counts for justification, if required
if (ts.mJustifying) {
PRInt32 numSpaces;
PRInt32 textLength;
// This will include a space for trailing whitespace, if any is present.
// This is corrected for in nsLineLayout::TrimWhiteSpaceIn.
// This work could be done in MeasureText, but it's complex to do accurately
// there because of the need to repair counts when wrapped words are backed out.
// So I do it via PrepareUnicodeText ... a little slower perhaps, but a lot saner,
// and it localizes the counting logic to one place.
numSpaces = PrepareUnicodeText(tx, nsnull, nsnull, &textLength);
lineLayout.SetTextJustificationWeights(numSpaces, textLength - numSpaces);
}
#ifdef MOZ_MATHML
// Simple minded code to also return the bounding metrics if the caller wants it...
// More consolidation is needed -- a better approach is to follow what is done by
// the other routines that are doing measurements.
if (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags) {
rv = NS_ERROR_UNEXPECTED; // initialize with an error; it is reset if things turn out well
aMetrics.mBoundingMetrics.Clear();
// Get the text to measure.
nsCOMPtr<nsIDOMText> domText(do_QueryInterface(mContent));
if (domText.get()) {
nsAutoString aData;
domText->GetData(aData);
// Extract the piece of text relevant to us -- XXX whitespace cause a mess here
nsAutoString aText;
aData.Mid(aText, mContentOffset, mContentLength);
// Set the font
SetFontFromStyle(aReflowState.rendContext, mStyleContext);
// Now get the exact bounding metrics of the text
nsBoundingMetrics bm;
rv = aReflowState.rendContext->GetBoundingMetrics(aText.get(), PRUint32(mContentLength), bm);
if (NS_SUCCEEDED(rv)) aMetrics.mBoundingMetrics = bm;
}
if (NS_FAILED(rv)) {
// Things didn't turn out well, just return the reflow metrics.
aMetrics.mBoundingMetrics.ascent = aMetrics.ascent;
aMetrics.mBoundingMetrics.descent = aMetrics.descent;
aMetrics.mBoundingMetrics.width = aMetrics.width;
#ifdef MOZ_MATHML_BOUNDINGMETRICS
printf("nsTextFrame: could not perform GetBoundingMetrics()\n");
#endif
}
}
#endif
nscoord maxFrameWidth = mRect.width;
nscoord maxFrameHeight = mRect.height;
// For future resize reflows we would like to avoid measuring the text.
// We can only do this if after this reflow we're:
// - complete. If we're not complete then our desired width doesn't
// represent our total size
// - we fit in the available space. We may be complete, but if we
// return a larger desired width than is available we may get pushed
// and our frame width won't get set
if (NS_FRAME_IS_COMPLETE(aStatus) && !NS_INLINE_IS_BREAK(aStatus) &&
(aMetrics.width <= maxWidth)) {
mState |= TEXT_OPTIMIZE_RESIZE;
mRect.width = aMetrics.width;
}
else {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
// If it's an incremental reflow command, then invalidate our existing
// bounds.
// XXX We need a finer granularity than this, but it isn't clear what
// has actually changed...
/*if (eReflowReason_Incremental == aReflowState.reason ||
eReflowReason_Dirty == aReflowState.reason) {*/
// XXX See bug 71523 We should really adjust the frames x coordinate to
// a pixel boundary to solve this.
// For now we add 1 pixel to the width of the invalidated rect.
// This fixes cases where the twips to pixel roundoff causes the invalidated
// rect's width to be one pixel short.
float p2t;
aPresContext->GetScaledPixelsToTwips(&p2t);
nscoord onePixel = NSIntPixelsToTwips(1, p2t);
maxFrameWidth = PR_MAX(maxFrameWidth, mRect.width) + onePixel;
maxFrameHeight = PR_MAX(maxFrameHeight, mRect.height);
nsRect damage(0,0,maxFrameWidth,maxFrameHeight);
if (!damage.IsEmpty()) {
Invalidate(aPresContext, damage);
}
/*}*/
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": desiredSize=%d,%d(a=%d/d=%d) status=%x\n",
aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent,
aStatus);
#endif
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
{
// We can continue a text run through a text frame
aContinueTextRun = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
{
aUsedSpace = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::TrimTrailingWhiteSpace(nsIPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth)
{
// in some situation (for instance, in wrapping mode, last space will not
// be added to total width if it exceed maxwidth), this flag will be set
// and we shouldn't trim non-added space
if (mState & TEXT_TRIMMED_WS) {
aDeltaWidth = 0;
return NS_OK;
}
nscoord dw = 0;
const nsStyleText* textStyle = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if (mContentLength &&
(NS_STYLE_WHITESPACE_PRE != textStyle->mWhiteSpace) &&
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP != textStyle->mWhiteSpace)) {
// Get the text fragments that make up our content
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
if (tc) {
const nsTextFragment* frag;
tc->GetText(&frag);
PRInt32 lastCharIndex = mContentOffset + mContentLength - 1;
if (lastCharIndex < frag->GetLength()) {
PRUnichar ch = frag->CharAt(lastCharIndex);
if (XP_IS_SPACE(ch)) {
// Get font metrics for a space so we can adjust the width by the
// right amount.
SetFontFromStyle(&aRC, mStyleContext);
aRC.GetWidth(' ', dw);
// NOTE: Trailing whitespace includes word and letter spacing!
nsStyleUnit unit;
unit = textStyle->mWordSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
dw += textStyle->mWordSpacing.GetCoordValue();
}
unit = textStyle->mLetterSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
dw += textStyle->mLetterSpacing.GetCoordValue();
}
}
}
}
}
#ifdef NOISY_TRIM
ListTag(stdout);
printf(": trim => %d\n", dw);
#endif
if (0 != dw) {
mState |= TEXT_TRIMMED_WS;
}
else {
mState &= ~TEXT_TRIMMED_WS;
}
aDeltaWidth = dw;
return NS_OK;
}
static void
RevertSpacesToNBSP(PRUnichar* aBuffer, PRInt32 aWordLen)
{
PRUnichar* end = aBuffer + aWordLen;
for (; aBuffer < end; aBuffer++) {
PRUnichar ch = *aBuffer;
if (ch == ' ') {
*aBuffer = CH_NBSP;
}
}
}
nsTextDimensions
nsTextFrame::ComputeTotalWordDimensions(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
const nsTextDimensions& aBaseDimensions,
PRUnichar* aWordBuf,
PRUint32 aWordLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore)
{
// Before we get going, convert any spaces in the current word back
// to nbsp's. This keeps the breaking logic happy.
RevertSpacesToNBSP(aWordBuf, (PRInt32) aWordLen);
nsTextDimensions addedDimensions;
PRUnichar *newWordBuf = aWordBuf;
PRUint32 newWordBufSize = aWordBufSize;
while (nsnull != aNextFrame) {
nsCOMPtr<nsIContent> content;
aNextFrame->GetContent(getter_AddRefs(content));
#ifdef DEBUG_WORD_WRAPPING
printf(" next textRun=");
nsFrame::ListTag(stdout, aNextFrame);
printf("\n");
#endif
nsCOMPtr<nsITextContent> tc(do_QueryInterface(content));
if (tc) {
PRBool stop = PR_FALSE;
nsTextDimensions moreDimensions;
moreDimensions = ComputeWordFragmentDimensions(aPresContext,
aLineBreaker,
aLineLayout,
aReflowState,
aNextFrame, content, tc,
&stop,
newWordBuf,
aWordLen,
newWordBufSize,
aCanBreakBefore);
if (moreDimensions.width < 0) {
PRUint32 moreSize = -moreDimensions.width;
//Oh, wordBuf is too small, we have to grow it
newWordBufSize += moreSize;
if (newWordBuf != aWordBuf) {
newWordBuf = (PRUnichar*)nsMemory::Realloc(newWordBuf, sizeof(PRUnichar)*newWordBufSize);
NS_ASSERTION(newWordBuf, "not enough memory");
} else {
newWordBuf = (PRUnichar*)nsMemory::Alloc(sizeof(PRUnichar)*newWordBufSize);
NS_ASSERTION(newWordBuf, "not enough memory");
if(newWordBuf) {
memcpy((void*)newWordBuf, aWordBuf, sizeof(PRUnichar)*(newWordBufSize-moreSize));
}
}
if(newWordBuf) {
moreDimensions =
ComputeWordFragmentDimensions(aPresContext, aLineBreaker,
aLineLayout, aReflowState,
aNextFrame, content, tc, &stop,
newWordBuf, aWordLen, newWordBufSize,
aCanBreakBefore);
NS_ASSERTION((moreDimensions.width >= 0),
"ComputeWordFragmentWidth is returning negative");
} else {
stop = PR_TRUE;
moreDimensions.Clear();
}
}
addedDimensions.Combine(moreDimensions);
#ifdef DEBUG_WORD_WRAPPING
printf(" moreWidth=%d (addedWidth=%d) stop=%c\n", moreDimensions.width,
addedDimensions.width, stop?'T':'F');
#endif
if (stop) {
goto done;
}
}
else {
// It claimed it was text but it doesn't implement the
// nsITextContent API. Therefore I don't know what to do with it
// and can't look inside it. Oh well.
goto done;
}
// Move on to the next frame in the text-run
aNextFrame = aLineLayout.FindNextText(aPresContext, aNextFrame);
}
done:;
#ifdef DEBUG_WORD_WRAPPING
printf(" total word width=%d\n", aBaseDimensions.width + addedDimensions.width);
#endif
if (newWordBuf && (newWordBuf != aWordBuf)) {
nsMemory::Free(newWordBuf);
}
addedDimensions.Combine(aBaseDimensions);
return addedDimensions;
}
nsTextDimensions
nsTextFrame::ComputeWordFragmentDimensions(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aTextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRBool* aStop,
const PRUnichar* aWordBuf,
PRUint32& aRunningWordLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore)
{
nsTextTransformer tx(aLineBreaker, nsnull, aPresContext);
tx.Init(aTextFrame, aContent, 0);
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
nsTextDimensions dimensions;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
PRUnichar* bp = tx.GetNextWord(PR_TRUE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
if (!bp) {
//empty text node, but we need to continue lookahead measurement
// AND we need to remember the text frame for later so that we don't
// bother doing the word look ahead.
aLineLayout.RecordWordFrame(aTextFrame);
return dimensions; // 0
}
if (isWhitespace) {
// Don't bother measuring nothing
*aStop = PR_TRUE;
return dimensions; // 0
}
// We need to adjust the length by look at the two pieces together
// but if we have to grow aWordBuf, ask caller do it by return a negative value of size
if ((wordLen + aRunningWordLen) > aWordBufSize) {
dimensions.width = aWordBufSize - wordLen - aRunningWordLen;
return dimensions;
}
*aStop = contentLen < tx.GetContentLength();
// Convert any spaces in the current word back to nbsp's. This keeps
// the breaking logic happy.
RevertSpacesToNBSP(bp, wordLen);
if (aCanBreakBefore) {
if(wordLen > 0)
{
memcpy((void*)&(aWordBuf[aRunningWordLen]), bp, sizeof(PRUnichar)*wordLen);
PRUint32 breakP=0;
PRBool needMore=PR_TRUE;
nsresult lres = aLineBreaker->Next(aWordBuf, aRunningWordLen+wordLen,
0, &breakP, &needMore);
if(NS_SUCCEEDED(lres))
{
// when we look at two pieces text together, we might decide to break
// eariler than if we only look at the 2nd pieces of text
if(!needMore && (breakP < (aRunningWordLen + wordLen)))
{
wordLen = breakP - aRunningWordLen;
if(wordLen < 0)
wordLen = 0;
*aStop = PR_TRUE;
}
}
// if we don't stop, we need to extend the buf so the next one can
// see this part otherwise, it does not matter since we will stop
// anyway
if(! *aStop)
aRunningWordLen += wordLen;
}
}
else {
// Even if the previous text fragment is not breakable, the connected pieces
// can be breakable in between. This especially true for CJK.
PRBool canBreak;
nsresult lres = aLineBreaker->BreakInBetween(aWordBuf, aRunningWordLen, bp, wordLen, &canBreak);
if (NS_SUCCEEDED(lres) && canBreak) {
wordLen = 0;
*aStop = PR_TRUE;
}
}
if((*aStop) && (wordLen == 0))
return dimensions; // 0;
nsCOMPtr<nsIStyleContext> sc;
aTextFrame->GetStyleContext(getter_AddRefs(sc));
if (sc) {
// Measure the piece of text. Note that we have to select the
// appropriate font into the text first because the rendering
// context has our font in it, not the font that aText is using.
nsIRenderingContext& rc = *aReflowState.rendContext;
nsCOMPtr<nsIFontMetrics> oldfm;
rc.GetFontMetrics(*getter_AddRefs(oldfm));
TextStyle ts(aLineLayout.mPresContext, rc, sc);
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, &dimensions);
}
else {
rc.GetTextDimensions(bp, wordLen, dimensions);
// NOTE: Don't forget to add letter spacing for the word fragment!
dimensions.width += wordLen*ts.mLetterSpacing;
}
rc.SetFont(oldfm);
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(bp, wordLen);
printf(" fragment='");
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
printf("' width=%d [wordLen=%d contentLen=%d ContentLength=%d]\n",
dimensions.width, wordLen, contentLen, tx.GetContentLength());
#endif
// Remember the text frame for later so that we don't bother doing
// the word look ahead.
aLineLayout.RecordWordFrame(aTextFrame);
return dimensions;
}
*aStop = PR_TRUE;
return dimensions; // 0
}
// Translate the mapped content into a string that's printable
void
nsTextFrame::ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const
{
const nsTextFragment* frag;
// Get the frames text content
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
if (!tc) {
return;
}
tc->GetText(&frag);
// Compute the total length of the text content.
*aTotalContentLength = frag->GetLength();
// Set current fragment and current fragment offset
if (0 == mContentLength) {
return;
}
PRInt32 fragOffset = mContentOffset;
PRInt32 n = fragOffset + mContentLength;
while (fragOffset < n) {
PRUnichar ch = frag->CharAt(fragOffset++);
if (ch == '\r') {
aBuf.Append(NS_LITERAL_STRING("\\r"));
} else if (ch == '\n') {
aBuf.Append(NS_LITERAL_STRING("\\n"));
} else if (ch == '\t') {
aBuf.Append(NS_LITERAL_STRING("\\t"));
} else if ((ch < ' ') || (ch >= 127)) {
aBuf.Append(NS_LITERAL_STRING("\\0"));
aBuf.AppendInt((PRInt32)ch, 8);
} else {
aBuf.Append(ch);
}
}
}
NS_IMETHODIMP
nsTextFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::textFrame;
NS_ADDREF(*aType);
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::IsEmpty(nsCompatibility aCompatMode,
PRBool aIsPre,
PRBool* aResult)
{
// XXXldb Should this check aCompatMode as well???
if (aIsPre) {
*aResult = PR_FALSE;
return NS_OK;
}
nsCOMPtr<nsITextContent> textContent( do_QueryInterface(mContent) );
if (! textContent) {
NS_NOTREACHED("text frame has no text content");
*aResult = PR_TRUE;
return NS_ERROR_UNEXPECTED;
}
return textContent->IsOnlyWhitespace(aResult);
}
#ifdef DEBUG
NS_IMETHODIMP
nsTextFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = sizeof(*this);
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Text"), aResult);
}
NS_IMETHODIMP
nsTextFrame::List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
{
// Output the tag
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", mParent);
#endif
nsIView* view;
GetView(aPresContext, &view);
if (nsnull != view) {
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, view));
}
PRInt32 totalContentLength;
nsAutoString tmp;
ToCString(tmp, &totalContentLength);
// Output the first/last content offset and prev/next in flow info
PRBool isComplete = (mContentOffset + mContentLength) == totalContentLength;
fprintf(out, "[%d,%d,%c] ",
mContentOffset, mContentLength,
isComplete ? 'T':'F');
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
}
nsIFrame* prevInFlow;
GetPrevInFlow(&prevInFlow);
if (nsnull != prevInFlow) {
fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, prevInFlow));
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
}
// Output the rect and state
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
if (mState & NS_FRAME_SELECTED_CONTENT) {
fprintf(out, " [state=%08x] SELECTED", mState);
} else {
fprintf(out, " [state=%08x]", mState);
}
}
fprintf(out, " sc=%p<\n", NS_STATIC_CAST(void*, mStyleContext));
// Output the text
aIndent++;
IndentBy(out, aIndent);
fputs("\"", out);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
fputs("\"\n", out);
aIndent--;
IndentBy(out, aIndent);
fputs(">\n", out);
return NS_OK;
}
#endif
#ifdef IBMBIDI
void nsTextFrame::AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
PRInt32 textLength,
PRBool isRTLChars,
PRBool isOddLevel,
PRBool isBidiSystem)
{
/* This adjustment is required whenever the text has been reversed by
* Mozilla before rendering.
*
* In theory this means any text whose Bidi embedding level has been
* set by the Unicode Bidi algorithm to an odd value, but this is
* only true in practice on a non-Bidi platform.
*
* On a Bidi platform the situation is more complicated because the
* platform will automatically reverse right-to-left characters; so
* Mozilla reverses text whose natural directionality is the opposite
* of its embedding level: right-to-left characters whose Bidi
* embedding level is even (e.g. Visual Hebrew) or left-to-right and
* neutral characters whose Bidi embedding level is odd (e.g. English
* text with <bdo dir="rtl">).
*
* The following condition is accordingly an optimization of
* if ( (!isBidiSystem && isOddLevel) ||
* (isBidiSystem &&
* ((isRTLChars && !isOddLevel) ||
* (!isRTLChars && isOddLevel))))
*/
if (isOddLevel ^ (isRTLChars && isBidiSystem)) {
PRInt32 swap = sdptr->mStart;
sdptr->mStart = textLength - sdptr->mEnd;
sdptr->mEnd = textLength - swap;
// temp fix for 75026 crasher untill we fix the bidi code
// the above bidi code cause mStart < 0 in some case
// the problem is we have whitespace compression code in
// nsTextTransformer which cause mEnd > textLength
NS_ASSERTION((sdptr->mStart >= 0) , "mStart >= 0");
if(sdptr->mStart < 0 )
sdptr->mStart = 0;
NS_ASSERTION((sdptr->mEnd >= 0) , "mEnd >= 0");
if(sdptr->mEnd < 0 )
sdptr->mEnd = 0;
NS_ASSERTION((sdptr->mStart <= sdptr->mEnd), "mStart <= mEnd");
if(sdptr->mStart > sdptr->mEnd)
sdptr->mEnd = sdptr->mStart;
}
return;
}
NS_IMETHODIMP
nsTextFrame::SetOffsets(PRInt32 aStart, PRInt32 aEnd)
{
mContentOffset = aStart;
mContentLength = aEnd - aStart;
return NS_OK;
}
#endif // IBMBIDI
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