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gecko-dev
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gecko-dev/layout/generic/nsPageFrame.cpp

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C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsPageFrame.h"
#include "nsHTMLParts.h"
#include "nsIContent.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsIReflowCommand.h"
#include "nsIRenderingContext.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsLayoutAtoms.h"
#include "nsIStyleSet.h"
#include "nsIPresShell.h"
#include "nsIDeviceContext.h"
// for page number localization formatting
#include "nsTextFormatter.h"
// DateTime Includes
#include "nsDateTimeFormatCID.h"
#include "nsIDateTimeFormat.h"
#include "nsIServiceManager.h"
#include "nsILocale.h"
#include "nsLocaleCID.h"
#include "nsILocaleService.h"
static NS_DEFINE_CID(kDateTimeFormatCID, NS_DATETIMEFORMAT_CID);
static NS_DEFINE_CID(kLocaleServiceCID, NS_LOCALESERVICE_CID);
// Temporary
#include "nsIFontMetrics.h"
// tstaic data members
PRUnichar * nsPageFrame::mPageNumFormat = nsnull;
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
#define DEBUG_PRINTING
#endif
#ifdef DEBUG_PRINTING
#define PRINT_DEBUG_MSG1(_msg1) fprintf(mDebugFD, (_msg1))
#define PRINT_DEBUG_MSG2(_msg1, _msg2) fprintf(mDebugFD, (_msg1), (_msg2))
#define PRINT_DEBUG_MSG3(_msg1, _msg2, _msg3) fprintf(mDebugFD, (_msg1), (_msg2), (_msg3))
#define PRINT_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4) fprintf(mDebugFD, (_msg1), (_msg2), (_msg3), (_msg4))
#define PRINT_DEBUG_MSG5(_msg1, _msg2, _msg3, _msg4, _msg5) fprintf(mDebugFD, (_msg1), (_msg2), (_msg3), (_msg4), (_msg5))
#else //--------------
#define PRINT_DEBUG_MSG1(_msg)
#define PRINT_DEBUG_MSG2(_msg1, _msg2)
#define PRINT_DEBUG_MSG3(_msg1, _msg2, _msg3)
#define PRINT_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4)
#define PRINT_DEBUG_MSG5(_msg1, _msg2, _msg3, _msg4, _msg5)
#endif
nsresult
NS_NewPageFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsPageFrame* it = new (aPresShell) nsPageFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsPageFrame::nsPageFrame() :
mHeadFootFont(nsnull),
mSupressHF(PR_FALSE),
mClipRect(-1, -1, -1, -1)
{
#ifdef NS_DEBUG
mDebugFD = stdout;
#endif
}
nsPageFrame::~nsPageFrame()
{
if (mHeadFootFont)
delete mHeadFootFont;
if (mPageNumFormat) {
nsMemory::Free(mPageNumFormat);
mPageNumFormat = nsnull;
}
}
NS_METHOD nsPageFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageFrame", aReflowState.reason);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
if (eReflowReason_Incremental == aReflowState.reason) {
// We don't expect the target of the reflow command to be page frame
#ifdef NS_DEUG
NS_ASSERTION(nsnull != aReflowState.reflowCommand, "null reflow command");
nsIFrame* target;
aReflowState.reflowCommand->GetTarget(target);
NS_ASSERTION(target != this, "page frame is reflow command target");
#endif
// Verify the next reflow command frame is our one and only child frame
nsIFrame* next;
aReflowState.reflowCommand->GetNext(next);
NS_ASSERTION(next == mFrames.FirstChild(), "bad reflow frame");
// Dispatch the reflow command to our frame
nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
mFrames.FirstChild(), maxSize);
kidReflowState.isTopOfPage = PR_TRUE;
ReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
kidReflowState, 0, 0, 0, aStatus);
// Place and size the child. Make sure the child is at least as
// tall as our max size (the containing window)
if (aDesiredSize.height < aReflowState.availableHeight) {
aDesiredSize.height = aReflowState.availableHeight;
}
FinishReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
0, 0, 0);
} else {
// Do we have any children?
// XXX We should use the overflow list instead...
if (mFrames.IsEmpty() && (nsnull != mPrevInFlow)) {
nsPageFrame* prevPage = (nsPageFrame*)mPrevInFlow;
nsIFrame* prevLastChild = prevPage->mFrames.LastChild();
// Create a continuing child of the previous page's last child
nsIPresShell* presShell;
nsIStyleSet* styleSet;
nsIFrame* newFrame;
aPresContext->GetShell(&presShell);
presShell->GetStyleSet(&styleSet);
NS_RELEASE(presShell);
styleSet->CreateContinuingFrame(aPresContext, prevLastChild, this, &newFrame);
NS_RELEASE(styleSet);
mFrames.SetFrames(newFrame);
}
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame,
maxSize);
kidReflowState.isTopOfPage = PR_TRUE;
// Get the child's desired size
ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
// Make sure the child is at least as tall as our max size (the containing window)
if (aDesiredSize.height < aReflowState.availableHeight) {
aDesiredSize.height = aReflowState.availableHeight;
}
// Place and size the child
FinishReflowChild(frame, aPresContext, aDesiredSize, 0, 0, 0);
// Is the frame complete?
if (NS_FRAME_IS_COMPLETE(aStatus)) {
nsIFrame* childNextInFlow;
frame->GetNextInFlow(&childNextInFlow);
NS_ASSERTION(nsnull == childNextInFlow, "bad child flow list");
}
}
PRINT_DEBUG_MSG2("PageFrame::Reflow %p ", this);
PRINT_DEBUG_MSG5("[%d,%d][%d,%d]\n", aDesiredSize.width, aDesiredSize.height, aReflowState.availableWidth, aReflowState.availableHeight);
// Return our desired size
aDesiredSize.width = aReflowState.availableWidth;
aDesiredSize.height = aReflowState.availableHeight;
}
PRINT_DEBUG_MSG2("PageFrame::Reflow %p ", this);
PRINT_DEBUG_MSG3("[%d,%d]\n", aReflowState.availableWidth, aReflowState.availableHeight);
return NS_OK;
}
NS_IMETHODIMP
nsPageFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::pageFrame;
NS_ADDREF(*aType);
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsPageFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Page", aResult);
}
#endif
NS_IMETHODIMP
nsPageFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
//------------------------------------------------------------------------------
nscoord nsPageFrame::GetXPosition(nsIRenderingContext& aRenderingContext,
const nsRect& aRect,
PRInt32 aJust,
const nsString& aStr)
{
PRInt32 width;
aRenderingContext.GetWidth(aStr, width);
nscoord x = aRect.x;
switch (aJust) {
case nsIPrintOptions::kJustLeft:
// do nothing, already set
break;
case nsIPrintOptions::kJustCenter:
x += (aRect.width - width) / 2;
break;
case nsIPrintOptions::kJustRight:
x += aRect.width - width;
break;
} // switch
return x;
}
//------------------------------------------------------------------------------
// Draw a Header or footer text lrft,right or center justified
// @parm aRenderingContext - rendering content ot draw into
// @parm aHeaderFooter - indicates whether it is a header or footer
// @parm aJust - indicates the justification of the text
// @parm aStr - The string to be drawn
// @parm aRect - the rect of the page
// @parm aHeight - the height of the text
// @parm aUseHalfThePage - indicates whether the text should limited to the width
// of the entire page or just half the page
void
nsPageFrame::DrawHeaderFooter(nsIRenderingContext& aRenderingContext,
nsIFrame * aFrame,
nsHeaderFooterEnum aHeaderFooter,
PRInt32 aJust,
const nsString& aStr,
const nsRect& aRect,
nscoord aHeight,
PRBool aUseHalfThePage)
{
// first make sure we have a vaild string and that the height of the
// text will fit in the margin
if (aStr.Length() > 0 &&
((aHeaderFooter == eHeader && aHeight < mMargin.top) ||
(aHeaderFooter == eFooter && aHeight < mMargin.bottom))) {
// measure the width of the text
nsString str = aStr;
PRInt32 width;
aRenderingContext.GetWidth(str, width);
PRBool addEllipse = PR_FALSE;
nscoord halfWidth = aRect.width;
if (aUseHalfThePage) {
halfWidth /= 2;
}
// trim the text and add the elipses if it won't fit
while (width >= halfWidth && str.Length() > 1) {
str.SetLength(str.Length()-1);
aRenderingContext.GetWidth(str, width);
addEllipse = PR_TRUE;
}
if (addEllipse && str.Length() > 3) {
str.SetLength(str.Length()-3);
str.AppendWithConversion("...");
aRenderingContext.GetWidth(str, width);
}
// cacl the x and y positions of the text
nsRect rect(aRect);
nscoord x = GetXPosition(aRenderingContext, rect, aJust, str);
nscoord y;
if (aHeaderFooter == eHeader) {
nscoord offset = ((mMargin.top - aHeight) / 2);
y = rect.y - offset - aHeight;
rect.Inflate(0, offset + aHeight);
} else {
nscoord offset = ((mMargin.bottom - aHeight) / 2);
y = rect.y + rect.height + offset;
rect.height += offset + aHeight;
}
// set up new clip and draw the text
PRBool clipEmpty;
aRenderingContext.PushState();
aRenderingContext.SetClipRect(rect, nsClipCombine_kReplace, clipEmpty);
aRenderingContext.DrawString(str, x, y);
aRenderingContext.PopState(clipEmpty);
#ifdef DEBUG_PRINTING
PRINT_DEBUG_MSG2("Page: %p", this);
char * s = str.ToNewCString();
if (s) {
PRINT_DEBUG_MSG2(" [%s]", s);
nsMemory::Free(s);
}
char justStr[64];
switch (aJust) {
case nsIPrintOptions::kJustLeft:strcpy(justStr, "Left");break;
case nsIPrintOptions::kJustCenter:strcpy(justStr, "Center");break;
case nsIPrintOptions::kJustRight:strcpy(justStr, "Right");break;
} // switch
PRINT_DEBUG_MSG2(" HF: %s ", aHeaderFooter==eHeader?"Header":"Footer");
PRINT_DEBUG_MSG2(" JST: %s ", justStr);
PRINT_DEBUG_MSG3(" x,y: %d,%d", x, y);
PRINT_DEBUG_MSG2(" Hgt: %d ", aHeight);
PRINT_DEBUG_MSG2(" Half: %s\n", aUseHalfThePage?"Yes":"No");
#endif
}
}
//------------------------------------------------------------------------------
NS_IMETHODIMP
nsPageFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
aRenderingContext.PushState();
PRBool clipEmpty;
if (mClipRect.width != -1 || mClipRect.height != -1) {
#ifdef DEBUG_PRINTING
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
printf("*** ClipRect: %5d,%5d,%5d,%5d\n", mClipRect.x, mClipRect.y, mClipRect.width, mClipRect.height);
}
#endif
mClipRect.x = 0;
mClipRect.y = 0;
aRenderingContext.SetClipRect(mClipRect, nsClipCombine_kReplace, clipEmpty);
}
nsresult rv = nsContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
nsRect r;
fprintf(mDebugFD, "PF::Paint -> %p SupHF: %s Rect: [%5d,%5d,%5d,%5d]\n", this,
mSupressHF?"Yes":"No", mRect.x, mRect.y, mRect.width, mRect.height);
}
#endif
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer && !mSupressHF) {
// get the current margin
mPrintOptions->GetMarginInTwips(mMargin);
nsRect rect(0,0,mRect.width, mRect.height);
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
// XXX Paint a one-pixel border around the page so it's easy to see where
// each page begins and ends when we're
float p2t;
aPresContext->GetPixelsToTwips(&p2t);
rect.Deflate(NSToCoordRound(p2t), NSToCoordRound(p2t));
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
aRenderingContext.DrawRect(rect);
rect.Inflate(NSToCoordRound(p2t), NSToCoordRound(p2t));
fprintf(mDebugFD, "PageFr::PaintChild -> Painting Frame %p Page No: %d\n", this, mPageNum);
#endif
// use the whole page
rect.width += mMargin.left + mMargin.right;
rect.x -= mMargin.left;
aRenderingContext.SetFont(*mHeadFootFont);
aRenderingContext.SetColor(NS_RGB(0,0,0));
// Get the FontMetrics to determine width.height of strings
nsCOMPtr<nsIDeviceContext> deviceContext;
aPresContext->GetDeviceContext(getter_AddRefs(deviceContext));
NS_ASSERTION(deviceContext, "Couldn't get the device context");
nsCOMPtr<nsIFontMetrics> fontMet;
deviceContext->GetMetricsFor(*mHeadFootFont, *getter_AddRefs(fontMet));
nscoord visibleHeight = 0;
if (fontMet) {
fontMet->GetHeight(visibleHeight);
}
// get the print options bits so we can figure out all the
// the extra pieces of text that need to be drawn
PRInt32 printOptBits;
mPrintOptions->GetPrintOptionsBits(&printOptBits);
// print page numbers
if (printOptBits & nsIPrintOptions::kOptPrintPageNums && mPageNumFormat != nsnull) {
PRInt16 justify = nsIPrintOptions::kJustLeft;
mPrintOptions->GetPageNumJust(&justify);
PRUnichar * valStr;
// print page number totals "x of x"
if (printOptBits & nsIPrintOptions::kOptPrintPageTotal) {
valStr = nsTextFormatter::smprintf(mPageNumFormat, mPageNum, mTotNumPages);
} else {
valStr = nsTextFormatter::smprintf(mPageNumFormat, mPageNum);
}
nsAutoString pageNoStr(valStr);
nsMemory::Free(valStr);
DrawHeaderFooter(aRenderingContext, this, eFooter, justify, pageNoStr, rect, visibleHeight);
}
// print localized date
if (printOptBits & nsIPrintOptions::kOptPrintDatePrinted) {
// Get Locale for Formating DateTime
nsCOMPtr<nsILocale> locale;
NS_WITH_SERVICE(nsILocaleService, localeSvc, kLocaleServiceCID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = localeSvc->GetApplicationLocale(getter_AddRefs(locale));
if (NS_SUCCEEDED(rv) && locale) {
nsCOMPtr<nsIDateTimeFormat> dateTime;
rv = nsComponentManager::CreateInstance(kDateTimeFormatCID,
NULL,
NS_GET_IID(nsIDateTimeFormat),
(void**) getter_AddRefs(dateTime));
if (NS_SUCCEEDED(rv)) {
nsAutoString dateString;
time_t ltime;
time( &ltime );
rv = dateTime->FormatTime(locale, kDateFormatShort, kTimeFormatNoSeconds, ltime, dateString);
if (NS_SUCCEEDED(rv)) {
DrawHeaderFooter(aRenderingContext, this, eFooter, nsIPrintOptions::kJustRight, dateString, rect, visibleHeight);
}
}
}
}
}
PRBool usingHalfThePage = (printOptBits & nsIPrintOptions::kOptPrintDocTitle) &&
(printOptBits & nsIPrintOptions::kOptPrintDocLoc);
// print document title
PRUnichar * title;
mPrintOptions->GetTitle(&title); // creates memory
if (title != nsnull && (printOptBits & nsIPrintOptions::kOptPrintDocTitle)) {
DrawHeaderFooter(aRenderingContext, this, eHeader, nsIPrintOptions::kJustLeft, nsAutoString(title), rect, visibleHeight, usingHalfThePage);
nsMemory::Free(title);
}
// print document URL
PRUnichar * url;
mPrintOptions->GetDocURL(&url);
if ((nsnull != url) && (printOptBits & nsIPrintOptions::kOptPrintDocLoc)) {
DrawHeaderFooter(aRenderingContext, this, eHeader, nsIPrintOptions::kJustRight, nsAutoString(url), rect, visibleHeight, usingHalfThePage);
nsMemory::Free(url);
}
}
aRenderingContext.PopState(clipEmpty);
return rv;
}
//------------------------------------------------------------------------------
void
nsPageFrame::SetPrintOptions(nsIPrintOptions * aPrintOptions)
{
NS_ASSERTION(aPrintOptions != nsnull, "Print Options can not be null!");
mPrintOptions = aPrintOptions;
// create a default font
mHeadFootFont = new nsFont("serif", NS_FONT_STYLE_NORMAL,NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL,0,NSIntPointsToTwips(10));
// now get the default font form the print options
mPrintOptions->GetDefaultFont(*mHeadFootFont);
}
//------------------------------------------------------------------------------
void
nsPageFrame::SetPageNumInfo(PRInt32 aPageNumber, PRInt32 aTotalPages)
{
mPageNum = aPageNumber;
mTotNumPages = aTotalPages;
}
//------------------------------------------------------------------------------
void
nsPageFrame::SetPageNumberFormat(PRUnichar * aFormatStr)
{
NS_ASSERTION(aFormatStr != nsnull, "Format string cannot be null!");
if (mPageNumFormat != nsnull) {
nsMemory::Free(mPageNumFormat);
}
mPageNumFormat = aFormatStr;
}
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