/* -*- 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 "nsPageFrame.h" #include "nsHTMLParts.h" #include "nsIContent.h" #include "nsPresContext.h" #include "nsStyleContext.h" #include "nsIRenderingContext.h" #include "nsHTMLAtoms.h" #include "nsLayoutAtoms.h" #include "nsIPresShell.h" #include "nsCSSFrameConstructor.h" #include "nsIDeviceContext.h" #include "nsReadableUtils.h" #include "nsPageContentFrame.h" #include "nsDisplayList.h" #include "nsLayoutUtils.h" // for function BinarySearchForPosition #include "nsIView.h" // view flags for clipping #include "nsCSSRendering.h" #include "nsHTMLContainerFrame.h" // view creation #include "nsSimplePageSequence.h" // for nsSharedPageData #include "nsRegion.h" #include "nsIViewManager.h" // for page number localization formatting #include "nsTextFormatter.h" #ifdef IBMBIDI #include "nsBidiUtils.h" #include "nsBidiPresUtils.h" #endif // Temporary #include "nsIFontMetrics.h" // Print Options #include "nsIPrintSettings.h" #include "nsGfxCIID.h" #include "nsIServiceManager.h" // Widget Creation #include "nsIWidget.h" #include "nsWidgetsCID.h" static NS_DEFINE_CID(kCChildCID, NS_CHILD_CID); #if defined(DEBUG_rods) || defined(DEBUG_dcone) //#define DEBUG_PRINTING #endif #include "prlog.h" #ifdef PR_LOGGING extern PRLogModuleInfo * kLayoutPrintingLogMod; #define PR_PL(_p1) PR_LOG(kLayoutPrintingLogMod, PR_LOG_DEBUG, _p1) #else #define PR_PL(_p1) #endif nsIFrame* NS_NewPageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) { return new (aPresShell) nsPageFrame(aContext); } nsPageFrame::nsPageFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) { } nsPageFrame::~nsPageFrame() { } NS_IMETHODIMP nsPageFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { DO_GLOBAL_REFLOW_COUNT("nsPageFrame", aReflowState.reason); DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus); aStatus = NS_FRAME_COMPLETE; // initialize out parameter // Do we have any children? // XXX We should use the overflow list instead... nsIFrame* firstFrame = mFrames.FirstChild(); nsPageContentFrame* contentPage = NS_STATIC_CAST(nsPageContentFrame*, firstFrame); NS_ASSERTION(contentPage, "There should always be a content page"); NS_ASSERTION(nsLayoutAtoms::pageContentFrame == firstFrame->GetType(), "This frame isn't a pageContentFrame"); if (contentPage && GetPrevInFlow() && eReflowReason_Incremental != aReflowState.reason && eReflowReason_Dirty != aReflowState.reason) { nsPageFrame* prevPage = NS_STATIC_CAST(nsPageFrame*, GetPrevInFlow()); nsPageContentFrame* prevContentPage = NS_STATIC_CAST(nsPageContentFrame*, prevPage->mFrames.FirstChild()); nsIFrame* prevLastChild = prevContentPage->mFrames.LastChild(); // Create a continuing child of the previous page's last child nsIFrame* newFrame; aPresContext->PresShell()->FrameConstructor()-> CreateContinuingFrame(aPresContext, prevLastChild, contentPage, &newFrame); // Make the new area frame the 1st child of the page content frame. There may already be // children placeholders which don't get reflowed but must not be destroyed until the // page content frame is destroyed. contentPage->mFrames.InsertFrame(contentPage, nsnull, 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(); // When the reflow size is NS_UNCONSTRAINEDSIZE it means we are reflowing // a single page to print selection. So this means we want to use // NS_UNCONSTRAINEDSIZE without altering it nscoord avHeight; if (mPD->mReflowSize.height == NS_UNCONSTRAINEDSIZE) { avHeight = NS_UNCONSTRAINEDSIZE; } else { avHeight = mPD->mReflowSize.height - mPD->mReflowMargin.TopBottom(); } nsSize maxSize(mPD->mReflowSize.width - mPD->mReflowMargin.LeftRight(), avHeight); // Get the number of Twips per pixel from the PresContext nscoord onePixelInTwips = aPresContext->IntScaledPixelsToTwips(1); // insurance against infinite reflow, when reflowing less than a pixel // XXX Shouldn't we do something more friendly when invalid margins // are set? if (maxSize.width < onePixelInTwips || maxSize.height < onePixelInTwips) { aDesiredSize.width = 0; aDesiredSize.height = 0; NS_WARNING("Reflow aborted; no space for content"); return NS_OK; } nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize); kidReflowState.mFlags.mIsTopOfPage = PR_TRUE; // calc location of frame nscoord xc = mPD->mReflowMargin.left + mPD->mExtraMargin.left; nscoord yc = mPD->mReflowMargin.top + mPD->mExtraMargin.top; // Get the child's desired size ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, xc, yc, 0, aStatus); // Place and size the child FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, xc, yc, 0); // Make sure the child is at least as tall as our max size (the containing window) if (aDesiredSize.height < aReflowState.availableHeight && aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) { aDesiredSize.height = aReflowState.availableHeight; } NS_ASSERTION(!NS_FRAME_IS_COMPLETE(aStatus) || !frame->GetNextInFlow(), "bad child flow list"); } PR_PL(("PageFrame::Reflow %p ", this)); PR_PL(("[%d,%d][%d,%d]\n", aDesiredSize.width, aDesiredSize.height, aReflowState.availableWidth, aReflowState.availableHeight)); // Return our desired size aDesiredSize.width = aReflowState.availableWidth; if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) { aDesiredSize.height = aReflowState.availableHeight; } aDesiredSize.ascent = aDesiredSize.height; aDesiredSize.descent = 0; PR_PL(("PageFrame::Reflow %p ", this)); PR_PL(("[%d,%d]\n", aReflowState.availableWidth, aReflowState.availableHeight)); NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize); return NS_OK; } nsIAtom* nsPageFrame::GetType() const { return nsLayoutAtoms::pageFrame; } #ifdef DEBUG NS_IMETHODIMP nsPageFrame::GetFrameName(nsAString& aResult) const { return MakeFrameName(NS_LITERAL_STRING("Page"), aResult); } #endif /* virtual */ PRBool nsPageFrame::IsContainingBlock() const { return PR_TRUE; } // done with static helper functions //------------------------------------------------------------------------------ void nsPageFrame::ProcessSpecialCodes(const nsString& aStr, nsString& aNewStr) { aNewStr = aStr; // Search to see if the &D code is in the string // then subst in the current date/time NS_NAMED_LITERAL_STRING(kDate, "&D"); if (aStr.Find(kDate) != kNotFound) { if (mPD->mDateTimeStr != nsnull) { aNewStr.ReplaceSubstring(kDate.get(), mPD->mDateTimeStr); } else { aNewStr.ReplaceSubstring(kDate.get(), EmptyString().get()); } } // NOTE: Must search for &PT before searching for &P // // Search to see if the "page number and page" total code are in the string // and replace the page number and page total code with the actual // values NS_NAMED_LITERAL_STRING(kPageAndTotal, "&PT"); if (aStr.Find(kPageAndTotal) != kNotFound) { PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumAndTotalsFormat, mPageNum, mTotNumPages); aNewStr.ReplaceSubstring(kPageAndTotal.get(), uStr); nsMemory::Free(uStr); } // Search to see if the page number code is in the string // and replace the page number code with the actual value NS_NAMED_LITERAL_STRING(kPage, "&P"); if (aStr.Find(kPage) != kNotFound) { PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumFormat, mPageNum); aNewStr.ReplaceSubstring(kPage.get(), uStr); nsMemory::Free(uStr); } NS_NAMED_LITERAL_STRING(kTitle, "&T"); if (aStr.Find(kTitle) != kNotFound) { if (mPD->mDocTitle != nsnull) { aNewStr.ReplaceSubstring(kTitle.get(), mPD->mDocTitle); } else { aNewStr.ReplaceSubstring(kTitle.get(), EmptyString().get()); } } NS_NAMED_LITERAL_STRING(kDocURL, "&U"); if (aStr.Find(kDocURL) != kNotFound) { if (mPD->mDocURL != nsnull) { aNewStr.ReplaceSubstring(kDocURL.get(), mPD->mDocURL); } else { aNewStr.ReplaceSubstring(kDocURL.get(), EmptyString().get()); } } NS_NAMED_LITERAL_STRING(kPageTotal, "&L"); if (aStr.Find(kPageTotal) != kNotFound) { PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumFormat, mTotNumPages); aNewStr.ReplaceSubstring(kPageTotal.get(), uStr); nsMemory::Free(uStr); } } //------------------------------------------------------------------------------ nscoord nsPageFrame::GetXPosition(nsIRenderingContext& aRenderingContext, const nsRect& aRect, PRInt32 aJust, const nsString& aStr) { PRInt32 width; nsLayoutUtils::SafeGetWidth(&aRenderingContext, aStr.get(), aStr.Length(), width); nscoord x = aRect.x; switch (aJust) { case nsIPrintSettings::kJustLeft: x += mPD->mExtraMargin.left + mPD->mEdgePaperMargin.left; break; case nsIPrintSettings::kJustCenter: x += (aRect.width - width) / 2; break; case nsIPrintSettings::kJustRight: x += aRect.width - width - mPD->mExtraMargin.right - mPD->mEdgePaperMargin.right; 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(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame * aFrame, nsHeaderFooterEnum aHeaderFooter, PRInt32 aJust, const nsString& aStr1, const nsString& aStr2, const nsString& aStr3, const nsRect& aRect, nscoord aAscent, nscoord aHeight) { PRInt32 numStrs = 0; if (!aStr1.IsEmpty()) numStrs++; if (!aStr2.IsEmpty()) numStrs++; if (!aStr3.IsEmpty()) numStrs++; if (numStrs == 0) return; nscoord strSpace = aRect.width / numStrs; if (!aStr1.IsEmpty()) { DrawHeaderFooter(aPresContext, aRenderingContext, aFrame, aHeaderFooter, nsIPrintSettings::kJustLeft, aStr1, aRect, aAscent, aHeight, strSpace); } if (!aStr2.IsEmpty()) { DrawHeaderFooter(aPresContext, aRenderingContext, aFrame, aHeaderFooter, nsIPrintSettings::kJustCenter, aStr2, aRect, aAscent, aHeight, strSpace); } if (!aStr3.IsEmpty()) { DrawHeaderFooter(aPresContext, aRenderingContext, aFrame, aHeaderFooter, nsIPrintSettings::kJustRight, aStr3, aRect, aAscent, aHeight, strSpace); } } //------------------------------------------------------------------------------ // 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 aWidth - available width for any one of the strings void nsPageFrame::DrawHeaderFooter(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame * aFrame, nsHeaderFooterEnum aHeaderFooter, PRInt32 aJust, const nsString& aStr, const nsRect& aRect, nscoord aAscent, nscoord aHeight, nscoord aWidth) { nscoord contentWidth = aWidth - (mPD->mEdgePaperMargin.left + mPD->mEdgePaperMargin.right); // first make sure we have a vaild string and that the height of the // text will fit in the margin if (!aStr.IsEmpty() && ((aHeaderFooter == eHeader && aHeight < mMargin.top) || (aHeaderFooter == eFooter && aHeight < mMargin.bottom))) { nsAutoString str; ProcessSpecialCodes(aStr, str); PRInt32 indx; PRInt32 textWidth = 0; const PRUnichar* text = str.get(); PRInt32 len = (PRInt32)str.Length(); if (len == 0) { return; // bail is empty string } // find how much text fits, the "position" is the size of the available area if (nsLayoutUtils::BinarySearchForPosition(&aRenderingContext, text, 0, 0, 0, len, PRInt32(contentWidth), indx, textWidth)) { if (indx < len-1 ) { // we can't fit in all the text if (indx > 3) { // But we can fit in at least 4 chars. Show all but 3 of them, then // an ellipsis. // XXXbz for non-plane0 text, this may be cutting things in the // middle of a codepoint! Also, we have no guarantees that the three // dots will fit in the space the three chars we removed took up with // these font metrics! str.Truncate(indx-3); str.AppendLiteral("..."); } else { // We can only fit 3 or fewer chars. Just show nothing str.Truncate(); } } } else { return; // bail if couldn't find the correct length } // cacl the x and y positions of the text nsRect rect(aRect); nscoord x = GetXPosition(aRenderingContext, rect, aJust, str); nscoord y; if (aHeaderFooter == eHeader) { y = rect.y + mPD->mExtraMargin.top + mPD->mEdgePaperMargin.top; } else { y = rect.y + rect.height - aHeight - mPD->mExtraMargin.bottom - mPD->mEdgePaperMargin.bottom; } // set up new clip and draw the text aRenderingContext.PushState(); aRenderingContext.SetColor(NS_RGB(0,0,0)); aRenderingContext.SetClipRect(rect, nsClipCombine_kReplace); #ifdef IBMBIDI nsresult rv = NS_ERROR_FAILURE; if (aPresContext->BidiEnabled()) { nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils(); if (bidiUtils) { // Base direction is always LTR for now. If bug 139337 is fixed, // that should change. rv = bidiUtils->RenderText(str.get(), str.Length(), NSBIDI_LTR, aPresContext, aRenderingContext, x, y + aAscent); } } if (NS_FAILED(rv)) #endif // IBMBIDI nsLayoutUtils::SafeDrawString(&aRenderingContext, str.get(), str.Length(), x, y + aAscent); aRenderingContext.PopState(); #ifdef DEBUG_PRINTING PR_PL(("Page: %p", this)); PR_PL((" [%s]", NS_ConvertUTF16toUTF8(str).get())); char justStr[64]; switch (aJust) { case nsIPrintSettings::kJustLeft:strcpy(justStr, "Left");break; case nsIPrintSettings::kJustCenter:strcpy(justStr, "Center");break; case nsIPrintSettings::kJustRight:strcpy(justStr, "Right");break; } // switch PR_PL((" HF: %s ", aHeaderFooter==eHeader?"Header":"Footer")); PR_PL((" JST: %s ", justStr)); PR_PL((" x,y: %d,%d", x, y)); PR_PL((" Hgt: %d \n", aHeight)); #endif } } static void PaintPrintPreviewBackground(nsIFrame* aFrame, nsIRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) { NS_STATIC_CAST(nsPageFrame*, aFrame)->PaintPrintPreviewBackground(*aCtx, aPt); } static void PaintPageBackground(nsIFrame* aFrame, nsIRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) { NS_STATIC_CAST(nsPageFrame*, aFrame)->DrawBackground(*aCtx, aDirtyRect, aPt); } static void PaintHeaderFooter(nsIFrame* aFrame, nsIRenderingContext* aCtx, const nsRect& aDirtyRect, nsPoint aPt) { NS_STATIC_CAST(nsPageFrame*, aFrame)->PaintHeaderFooter(*aCtx, aPt); } //------------------------------------------------------------------------------ NS_IMETHODIMP nsPageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists) { nsDisplayListCollection set; if (GetPresContext()->IsScreen()) { nsresult rv = set.BorderBackground()->AppendNewToTop(new (aBuilder) nsDisplayGeneric(this, ::PaintPrintPreviewBackground, "PrintPreviewBackground")); NS_ENSURE_SUCCESS(rv, rv); } nsresult rv = set.BorderBackground()->AppendNewToTop(new (aBuilder) nsDisplayGeneric(this, ::PaintPageBackground, "PageBackground")); NS_ENSURE_SUCCESS(rv, rv); // REVIEW: There was a "aRenderingContext.SetColor(NS_RGB(255,255,255));" // here which was overridden on every code path, so I removed it. rv = nsContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, set); NS_ENSURE_SUCCESS(rv, rv); if (GetPresContext()->IsRootPaginatedDocument()) { rv = set.Content()->AppendNewToTop(new (aBuilder) nsDisplayGeneric(this, ::PaintHeaderFooter, "HeaderFooter")); NS_ENSURE_SUCCESS(rv, rv); } set.MoveTo(aLists); return NS_OK; } //------------------------------------------------------------------------------ void nsPageFrame::SetPageNumInfo(PRInt32 aPageNumber, PRInt32 aTotalPages) { mPageNum = aPageNumber; mTotNumPages = aTotalPages; } void nsPageFrame::PaintPrintPreviewBackground(nsIRenderingContext& aRenderingContext, nsPoint aPt) { // fill page with White aRenderingContext.SetColor(NS_RGB(255,255,255)); // REVIEW: this used to have rect's width and height be the // mClipRect if specialClipIsSet ... but that seems completely bogus // and inconsistent with the painting of the shadow below nsRect rect(aPt, GetSize()); rect.width -= mPD->mShadowSize.width; rect.height -= mPD->mShadowSize.height; aRenderingContext.FillRect(rect); // draw line around outside of page aRenderingContext.SetColor(NS_RGB(0,0,0)); aRenderingContext.DrawRect(rect); if (mPD->mShadowSize.width > 0 && mPD->mShadowSize.height > 0) { aRenderingContext.SetColor(NS_RGB(51,51,51)); nsRect r(aPt.x,aPt.y, mRect.width, mRect.height); nsRect shadowRect; shadowRect.x = r.x + r.width - mPD->mShadowSize.width; shadowRect.y = r.y + mPD->mShadowSize.height; shadowRect.width = mPD->mShadowSize.width; shadowRect.height = r.height - mPD->mShadowSize.height; aRenderingContext.FillRect(shadowRect); shadowRect.x = r.x + mPD->mShadowSize.width; shadowRect.y = r.y + r.height - mPD->mShadowSize.height; shadowRect.width = r.width - mPD->mShadowSize.width; shadowRect.height = mPD->mShadowSize.height; aRenderingContext.FillRect(shadowRect); } } void nsPageFrame::PaintHeaderFooter(nsIRenderingContext& aRenderingContext, nsPoint aPt) { nsPresContext* pc = GetPresContext(); if (!mPD->mPrintSettings) { if (pc->Type() == nsPresContext::eContext_PrintPreview || pc->IsDynamic()) mPD->mPrintSettings = pc->GetPrintSettings(); if (!mPD->mPrintSettings) return; } // get the current margin mPD->mPrintSettings->GetMarginInTwips(mMargin); nsRect rect(aPt.x, aPt.y, mRect.width - mPD->mShadowSize.width, mRect.height - mPD->mShadowSize.height); aRenderingContext.SetFont(*mPD->mHeadFootFont, nsnull); aRenderingContext.SetColor(NS_RGB(0,0,0)); // Get the FontMetrics to determine width.height of strings nsCOMPtr fontMet; pc->DeviceContext()->GetMetricsFor(*mPD->mHeadFootFont, nsnull, *getter_AddRefs(fontMet)); nscoord ascent = 0; nscoord visibleHeight = 0; if (fontMet) { fontMet->GetHeight(visibleHeight); fontMet->GetMaxAscent(ascent); } // print document headers and footers PRUnichar * headers[3]; mPD->mPrintSettings->GetHeaderStrLeft(&headers[0]); // creates memory mPD->mPrintSettings->GetHeaderStrCenter(&headers[1]); // creates memory mPD->mPrintSettings->GetHeaderStrRight(&headers[2]); // creates memory DrawHeaderFooter(pc, aRenderingContext, this, eHeader, nsIPrintSettings::kJustLeft, nsAutoString(headers[0]), nsAutoString(headers[1]), nsAutoString(headers[2]), rect, ascent, visibleHeight); PRInt32 i; for (i=0;i<3;i++) nsMemory::Free(headers[i]); PRUnichar * footers[3]; mPD->mPrintSettings->GetFooterStrLeft(&footers[0]); // creates memory mPD->mPrintSettings->GetFooterStrCenter(&footers[1]); // creates memory mPD->mPrintSettings->GetFooterStrRight(&footers[2]); // creates memory DrawHeaderFooter(pc, aRenderingContext, this, eFooter, nsIPrintSettings::kJustRight, nsAutoString(footers[0]), nsAutoString(footers[1]), nsAutoString(footers[2]), rect, ascent, visibleHeight); for (i=0;i<3;i++) nsMemory::Free(footers[i]); } //------------------------------------------------------------------------------ void nsPageFrame::DrawBackground(nsIRenderingContext& aRenderingContext, const nsRect& aDirtyRect, nsPoint aPt) { nsSimplePageSequenceFrame* seqFrame = NS_STATIC_CAST(nsSimplePageSequenceFrame*, mParent); if (seqFrame != nsnull) { nsIFrame* pageContentFrame = mFrames.FirstChild(); NS_ASSERTION(pageContentFrame, "Must always be there."); const nsStyleBorder* border = GetStyleBorder(); const nsStylePadding* padding = GetStylePadding(); nsCSSRendering::PaintBackground(GetPresContext(), aRenderingContext, this, aDirtyRect, pageContentFrame->GetRect() + aPt, *border, *padding, PR_TRUE); } } void nsPageFrame::SetSharedPageData(nsSharedPageData* aPD) { mPD = aPD; // Set the shared data into the page frame before reflow nsPageContentFrame * pcf = NS_STATIC_CAST(nsPageContentFrame*, mFrames.FirstChild()); if (pcf) { pcf->SetSharedPageData(mPD); } } nsIFrame* NS_NewPageBreakFrame(nsIPresShell* aPresShell, nsStyleContext* aContext) { NS_PRECONDITION(aPresShell, "null PresShell"); #ifdef DEBUG //check that we are only creating page break frames when printing NS_ASSERTION(aPresShell->GetPresContext()->IsPaginated(), "created a page break frame while not printing"); #endif return new (aPresShell) nsPageBreakFrame(aContext); } nsPageBreakFrame::nsPageBreakFrame(nsStyleContext* aContext) : nsLeafFrame(aContext), mHaveReflowed(PR_FALSE) { } nsPageBreakFrame::~nsPageBreakFrame() { } void nsPageBreakFrame::GetDesiredSize(nsPresContext* aPresContext, const nsHTMLReflowState& aReflowState, nsHTMLReflowMetrics& aDesiredSize) { NS_PRECONDITION(aPresContext, "null pres context"); nscoord onePixel = aPresContext->IntScaledPixelsToTwips(1); aDesiredSize.width = onePixel; if (mHaveReflowed) { // If blocks reflow us a 2nd time trying to put us on a new page, then return // a desired height of 0 to avoid an extra page break. aDesiredSize.height = 0; } else { aDesiredSize.height = aReflowState.availableHeight; // round the height down to the nearest pixel aDesiredSize.height -= aDesiredSize.height % onePixel; } if (aDesiredSize.mComputeMEW) { aDesiredSize.mMaxElementWidth = onePixel; } aDesiredSize.ascent = 0; aDesiredSize.descent = 0; } nsresult nsPageBreakFrame::Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aDesiredSize, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus) { NS_PRECONDITION(aPresContext, "null pres context"); DO_GLOBAL_REFLOW_COUNT("nsTableFrame", aReflowState.reason); DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus); aStatus = NS_FRAME_COMPLETE; GetDesiredSize(aPresContext, aReflowState, aDesiredSize); mHaveReflowed = PR_TRUE; return NS_OK; } nsIAtom* nsPageBreakFrame::GetType() const { return nsLayoutAtoms::pageBreakFrame; }