зеркало из https://github.com/mozilla/pjs.git
257 строки
9.4 KiB
C++
257 строки
9.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
#include "nsCOMPtr.h"
|
|
#include "nsFrame.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsLineLayout.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsHTMLAtoms.h"
|
|
#include "nsIFontMetrics.h"
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsLayoutAtoms.h"
|
|
|
|
//FOR SELECTION
|
|
#include "nsIContent.h"
|
|
#include "nsIFrameSelection.h"
|
|
//END INCLUDES FOR SELECTION
|
|
|
|
class BRFrame : public nsFrame {
|
|
public:
|
|
// nsIFrame
|
|
#ifdef NS_DEBUG
|
|
NS_IMETHOD Paint(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags = 0);
|
|
#endif
|
|
NS_IMETHOD GetContentAndOffsetsFromPoint(nsPresContext* aCX,
|
|
const nsPoint& aPoint,
|
|
nsIContent** aNewContent,
|
|
PRInt32& aContentOffset,
|
|
PRInt32& aContentOffsetEnd,
|
|
PRBool& aBeginFrameContent);
|
|
NS_IMETHOD PeekOffset(nsPresContext* aPresContext,
|
|
nsPeekOffsetStruct *aPos);
|
|
|
|
// nsIHTMLReflow
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
virtual nsIAtom* GetType() const;
|
|
protected:
|
|
virtual ~BRFrame();
|
|
};
|
|
|
|
nsresult
|
|
NS_NewBRFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsIFrame* frame = new (aPresShell) BRFrame;
|
|
if (nsnull == frame) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = frame;
|
|
return NS_OK;
|
|
}
|
|
|
|
BRFrame::~BRFrame()
|
|
{
|
|
}
|
|
|
|
#ifdef NS_DEBUG
|
|
NS_IMETHODIMP
|
|
BRFrame::Paint(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags)
|
|
{
|
|
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
|
|
float p2t;
|
|
p2t = aPresContext->PixelsToTwips();
|
|
nscoord five = NSIntPixelsToTwips(5, p2t);
|
|
aRenderingContext.SetColor(NS_RGB(0, 255, 255));
|
|
aRenderingContext.FillRect(0, 0, five, five*2);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
NS_IMETHODIMP
|
|
BRFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("BRFrame", aReflowState.reason);
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
if (aMetrics.mComputeMEW) {
|
|
aMetrics.mMaxElementWidth = 0;
|
|
}
|
|
aMetrics.height = 0; // BR frames with height 0 are ignored in quirks
|
|
// mode by nsLineLayout::VerticalAlignFrames .
|
|
// However, it's not always 0. See below.
|
|
aMetrics.width = 0;
|
|
aMetrics.ascent = 0;
|
|
aMetrics.descent = 0;
|
|
|
|
// Only when the BR is operating in a line-layout situation will it
|
|
// behave like a BR.
|
|
nsLineLayout* ll = aReflowState.mLineLayout;
|
|
if (ll) {
|
|
// Note that the compatibility mode check excludes AlmostStandards
|
|
// mode, since this is the inline box model. See bug 161691.
|
|
if ( ll->CanPlaceFloatNow() ||
|
|
ll->GetCompatMode() == eCompatibility_FullStandards ) {
|
|
// If we can place a float on the line now it means that the
|
|
// line is effectively empty (there may be zero sized compressed
|
|
// white-space frames on the line, but they are to be ignored).
|
|
//
|
|
// If this frame is going to terminate the line we know
|
|
// that nothing else will go on the line. Therefore, in this
|
|
// case, we provide some height for the BR frame so that it
|
|
// creates some vertical whitespace. It's necessary to use the
|
|
// line-height rather than the font size because the
|
|
// quirks-mode fix that doesn't apply the block's min
|
|
// line-height makes this necessary to make BR cause a line
|
|
// of the full line-height
|
|
|
|
// We also do this in strict mode because BR should act like a
|
|
// normal inline frame. That line-height is used is important
|
|
// here for cases where the line-height is less that 1.
|
|
SetFontFromStyle(aReflowState.rendContext, mStyleContext);
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
aReflowState.rendContext->GetFontMetrics(*getter_AddRefs(fm));
|
|
if (fm) {
|
|
nscoord ascent, descent;
|
|
fm->GetMaxAscent(ascent);
|
|
fm->GetMaxDescent(descent);
|
|
nscoord logicalHeight =
|
|
aReflowState.CalcLineHeight(aPresContext,
|
|
aReflowState.rendContext,
|
|
this);
|
|
nscoord leading = logicalHeight - ascent - descent;
|
|
aMetrics.height = logicalHeight;
|
|
aMetrics.ascent = ascent + (leading/2);
|
|
aMetrics.descent = logicalHeight - aMetrics.ascent;
|
|
// = descent + (leading/2), but without rounding error
|
|
}
|
|
else {
|
|
aMetrics.ascent = aMetrics.height = 0;
|
|
}
|
|
|
|
// XXX temporary until I figure out a better solution; see the
|
|
// code in nsLineLayout::VerticalAlignFrames that zaps minY/maxY
|
|
// if the width is zero.
|
|
// XXX This also fixes bug 10036!
|
|
// Warning: nsTextControlFrame::CalculateSizeStandard depends on
|
|
// the following line, see bug 228752.
|
|
aMetrics.width = 1;
|
|
|
|
// Update max-element-width to keep us honest
|
|
if (aMetrics.mComputeMEW && aMetrics.width > aMetrics.mMaxElementWidth) {
|
|
aMetrics.mMaxElementWidth = aMetrics.width;
|
|
}
|
|
}
|
|
|
|
// Return our reflow status
|
|
PRUint32 breakType = aReflowState.mStyleDisplay->mBreakType;
|
|
if (NS_STYLE_CLEAR_NONE == breakType) {
|
|
breakType = NS_STYLE_CLEAR_LINE;
|
|
}
|
|
|
|
aStatus = NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
|
|
NS_INLINE_MAKE_BREAK_TYPE(breakType);
|
|
ll->SetLineEndsInBR(PR_TRUE);
|
|
}
|
|
else {
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIAtom*
|
|
BRFrame::GetType() const
|
|
{
|
|
return nsLayoutAtoms::brFrame;
|
|
}
|
|
|
|
NS_IMETHODIMP BRFrame::GetContentAndOffsetsFromPoint(nsPresContext* aCX,
|
|
const nsPoint& aPoint,
|
|
nsIContent ** aContent,
|
|
PRInt32& aOffsetBegin,
|
|
PRInt32& aOffsetEnd,
|
|
PRBool& aBeginFrameContent)
|
|
{
|
|
if (!mContent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
NS_IF_ADDREF(*aContent = mContent->GetParent());
|
|
|
|
if (*aContent)
|
|
aOffsetBegin = (*aContent)->IndexOf(mContent);
|
|
aOffsetEnd = aOffsetBegin;
|
|
aBeginFrameContent = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP BRFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
|
|
{
|
|
if (!aPos)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
//offset of this content in its parents child list. base 0
|
|
PRInt32 offsetBegin = mContent->GetParent()->IndexOf(mContent);
|
|
|
|
if (aPos->mAmount != eSelectLine && aPos->mAmount != eSelectBeginLine
|
|
&& aPos->mAmount != eSelectEndLine) //then we must do the adjustment to make sure we leave this frame
|
|
{
|
|
if (aPos->mDirection == eDirNext)
|
|
aPos->mStartOffset = offsetBegin +1;//go to end to make sure we jump to next node.
|
|
else
|
|
aPos->mStartOffset = offsetBegin; //we start at beginning to make sure we leave this frame.
|
|
}
|
|
return nsFrame::PeekOffset(aPresContext, aPos);//now we let the default take over.
|
|
}
|