mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
598 lines
21 KiB
C++
598 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsPageFrame.h"
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#include "nsPresContext.h"
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#include "nsStyleContext.h"
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#include "nsRenderingContext.h"
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#include "nsGkAtoms.h"
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#include "nsIPresShell.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsReadableUtils.h"
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#include "nsPageContentFrame.h"
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#include "nsDisplayList.h"
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#include "nsLayoutUtils.h" // for function BinarySearchForPosition
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#include "nsCSSRendering.h"
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#include "nsSimplePageSequence.h" // for nsSharedPageData
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#include "nsTextFormatter.h" // for page number localization formatting
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#ifdef IBMBIDI
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#include "nsBidiUtils.h"
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#endif
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#include "nsIPrintSettings.h"
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#include "nsRegion.h"
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#include "prlog.h"
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#ifdef PR_LOGGING
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extern PRLogModuleInfo * kLayoutPrintingLogMod;
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#define PR_PL(_p1) PR_LOG(kLayoutPrintingLogMod, PR_LOG_DEBUG, _p1)
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#else
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#define PR_PL(_p1)
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#endif
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nsIFrame*
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NS_NewPageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsPageFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsPageFrame)
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nsPageFrame::nsPageFrame(nsStyleContext* aContext)
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: nsContainerFrame(aContext)
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{
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}
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nsPageFrame::~nsPageFrame()
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{
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}
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NS_IMETHODIMP nsPageFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("nsPageFrame");
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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aStatus = NS_FRAME_COMPLETE; // initialize out parameter
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NS_ASSERTION(mFrames.FirstChild() &&
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nsGkAtoms::pageContentFrame == mFrames.FirstChild()->GetType(),
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"pageFrame must have a pageContentFrame child");
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// Resize our frame allowing it only to be as big as we are
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// XXX Pay attention to the page's border and padding...
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if (mFrames.NotEmpty()) {
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nsIFrame* frame = mFrames.FirstChild();
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// When the reflow size is NS_UNCONSTRAINEDSIZE it means we are reflowing
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// a single page to print selection. So this means we want to use
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// NS_UNCONSTRAINEDSIZE without altering it
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nscoord avHeight;
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if (mPD->mReflowSize.height == NS_UNCONSTRAINEDSIZE) {
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avHeight = NS_UNCONSTRAINEDSIZE;
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} else {
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avHeight = mPD->mReflowSize.height - mPD->mReflowMargin.TopBottom();
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}
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nsSize maxSize(mPD->mReflowSize.width - mPD->mReflowMargin.LeftRight(),
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avHeight);
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float scale = aPresContext->GetPageScale();
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maxSize.width = NSToCoordCeil(maxSize.width / scale);
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if (maxSize.height != NS_UNCONSTRAINEDSIZE) {
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maxSize.height = NSToCoordCeil(maxSize.height / scale);
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}
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// Get the number of Twips per pixel from the PresContext
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nscoord onePixelInTwips = nsPresContext::CSSPixelsToAppUnits(1);
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// insurance against infinite reflow, when reflowing less than a pixel
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// XXX Shouldn't we do something more friendly when invalid margins
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// are set?
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if (maxSize.width < onePixelInTwips || maxSize.height < onePixelInTwips) {
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aDesiredSize.width = 0;
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aDesiredSize.height = 0;
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NS_WARNING("Reflow aborted; no space for content");
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return NS_OK;
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}
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nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
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kidReflowState.mFlags.mIsTopOfPage = true;
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kidReflowState.mFlags.mTableIsSplittable = true;
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// calc location of frame
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nscoord xc = mPD->mReflowMargin.left + mPD->mExtraMargin.left;
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nscoord yc = mPD->mReflowMargin.top + mPD->mExtraMargin.top;
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// Get the child's desired size
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ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, xc, yc, 0, aStatus);
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// Place and size the child
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FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, xc, yc, 0);
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NS_ASSERTION(!NS_FRAME_IS_FULLY_COMPLETE(aStatus) ||
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!frame->GetNextInFlow(), "bad child flow list");
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}
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PR_PL(("PageFrame::Reflow %p ", this));
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PR_PL(("[%d,%d][%d,%d]\n", aDesiredSize.width, aDesiredSize.height, aReflowState.availableWidth, aReflowState.availableHeight));
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// Return our desired size
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aDesiredSize.width = aReflowState.availableWidth;
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if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
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aDesiredSize.height = aReflowState.availableHeight;
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}
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aDesiredSize.SetOverflowAreasToDesiredBounds();
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FinishAndStoreOverflow(&aDesiredSize);
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PR_PL(("PageFrame::Reflow %p ", this));
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PR_PL(("[%d,%d]\n", aReflowState.availableWidth, aReflowState.availableHeight));
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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return NS_OK;
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}
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nsIAtom*
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nsPageFrame::GetType() const
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{
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return nsGkAtoms::pageFrame;
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}
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#ifdef DEBUG
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NS_IMETHODIMP
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nsPageFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Page"), aResult);
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}
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#endif
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void
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nsPageFrame::ProcessSpecialCodes(const nsString& aStr, nsString& aNewStr)
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{
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aNewStr = aStr;
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// Search to see if the &D code is in the string
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// then subst in the current date/time
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NS_NAMED_LITERAL_STRING(kDate, "&D");
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if (aStr.Find(kDate) != kNotFound) {
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if (mPD->mDateTimeStr != nullptr) {
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aNewStr.ReplaceSubstring(kDate.get(), mPD->mDateTimeStr);
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} else {
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aNewStr.ReplaceSubstring(kDate.get(), EmptyString().get());
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}
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}
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// NOTE: Must search for &PT before searching for &P
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//
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// Search to see if the "page number and page" total code are in the string
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// and replace the page number and page total code with the actual
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// values
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NS_NAMED_LITERAL_STRING(kPageAndTotal, "&PT");
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if (aStr.Find(kPageAndTotal) != kNotFound) {
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PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumAndTotalsFormat, mPageNum, mTotNumPages);
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aNewStr.ReplaceSubstring(kPageAndTotal.get(), uStr);
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nsMemory::Free(uStr);
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}
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// Search to see if the page number code is in the string
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// and replace the page number code with the actual value
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NS_NAMED_LITERAL_STRING(kPage, "&P");
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if (aStr.Find(kPage) != kNotFound) {
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PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumFormat, mPageNum);
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aNewStr.ReplaceSubstring(kPage.get(), uStr);
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nsMemory::Free(uStr);
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}
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NS_NAMED_LITERAL_STRING(kTitle, "&T");
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if (aStr.Find(kTitle) != kNotFound) {
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if (mPD->mDocTitle != nullptr) {
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aNewStr.ReplaceSubstring(kTitle.get(), mPD->mDocTitle);
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} else {
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aNewStr.ReplaceSubstring(kTitle.get(), EmptyString().get());
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}
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}
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NS_NAMED_LITERAL_STRING(kDocURL, "&U");
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if (aStr.Find(kDocURL) != kNotFound) {
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if (mPD->mDocURL != nullptr) {
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aNewStr.ReplaceSubstring(kDocURL.get(), mPD->mDocURL);
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} else {
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aNewStr.ReplaceSubstring(kDocURL.get(), EmptyString().get());
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}
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}
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NS_NAMED_LITERAL_STRING(kPageTotal, "&L");
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if (aStr.Find(kPageTotal) != kNotFound) {
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PRUnichar * uStr = nsTextFormatter::smprintf(mPD->mPageNumFormat, mTotNumPages);
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aNewStr.ReplaceSubstring(kPageTotal.get(), uStr);
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nsMemory::Free(uStr);
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}
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}
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//------------------------------------------------------------------------------
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nscoord nsPageFrame::GetXPosition(nsRenderingContext& aRenderingContext,
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const nsRect& aRect,
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PRInt32 aJust,
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const nsString& aStr)
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{
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nscoord width = nsLayoutUtils::GetStringWidth(this, &aRenderingContext,
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aStr.get(), aStr.Length());
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nscoord x = aRect.x;
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switch (aJust) {
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case nsIPrintSettings::kJustLeft:
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x += mPD->mExtraMargin.left + mPD->mEdgePaperMargin.left;
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break;
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case nsIPrintSettings::kJustCenter:
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x += (aRect.width - width) / 2;
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break;
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case nsIPrintSettings::kJustRight:
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x += aRect.width - width - mPD->mExtraMargin.right - mPD->mEdgePaperMargin.right;
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break;
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} // switch
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return x;
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}
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// Draw a header or footer
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// @param aRenderingContext - rendering content ot draw into
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// @param aHeaderFooter - indicates whether it is a header or footer
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// @param aStrLeft - string for the left header or footer; can be empty
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// @param aStrCenter - string for the center header or footer; can be empty
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// @param aStrRight - string for the right header or footer; can be empty
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// @param aRect - the rect of the page
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// @param aAscent - the ascent of the font
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// @param aHeight - the height of the font
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void
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nsPageFrame::DrawHeaderFooter(nsRenderingContext& aRenderingContext,
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nsHeaderFooterEnum aHeaderFooter,
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const nsString& aStrLeft,
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const nsString& aStrCenter,
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const nsString& aStrRight,
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const nsRect& aRect,
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nscoord aAscent,
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nscoord aHeight)
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{
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PRInt32 numStrs = 0;
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if (!aStrLeft.IsEmpty()) numStrs++;
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if (!aStrCenter.IsEmpty()) numStrs++;
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if (!aStrRight.IsEmpty()) numStrs++;
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if (numStrs == 0) return;
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nscoord strSpace = aRect.width / numStrs;
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if (!aStrLeft.IsEmpty()) {
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DrawHeaderFooter(aRenderingContext, aHeaderFooter,
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nsIPrintSettings::kJustLeft, aStrLeft, aRect, aAscent,
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aHeight, strSpace);
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}
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if (!aStrCenter.IsEmpty()) {
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DrawHeaderFooter(aRenderingContext, aHeaderFooter,
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nsIPrintSettings::kJustCenter, aStrCenter, aRect, aAscent,
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aHeight, strSpace);
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}
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if (!aStrRight.IsEmpty()) {
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DrawHeaderFooter(aRenderingContext, aHeaderFooter,
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nsIPrintSettings::kJustRight, aStrRight, aRect, aAscent,
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aHeight, strSpace);
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}
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}
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// Draw a header or footer string
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// @param aRenderingContext - rendering context to draw into
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// @param aHeaderFooter - indicates whether it is a header or footer
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// @param aJust - indicates where the string is located within the header/footer
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// @param aStr - the string to be drawn
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// @param aRect - the rect of the page
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// @param aHeight - the height of the font
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// @param aAscent - the ascent of the font
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// @param aWidth - available width for the string
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void
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nsPageFrame::DrawHeaderFooter(nsRenderingContext& aRenderingContext,
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nsHeaderFooterEnum aHeaderFooter,
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PRInt32 aJust,
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const nsString& aStr,
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const nsRect& aRect,
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nscoord aAscent,
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nscoord aHeight,
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nscoord aWidth)
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{
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nscoord contentWidth = aWidth - (mPD->mEdgePaperMargin.left + mPD->mEdgePaperMargin.right);
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if ((aHeaderFooter == eHeader && aHeight < mPD->mReflowMargin.top) ||
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(aHeaderFooter == eFooter && aHeight < mPD->mReflowMargin.bottom)) {
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nsAutoString str;
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ProcessSpecialCodes(aStr, str);
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PRInt32 indx;
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PRInt32 textWidth = 0;
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const PRUnichar* text = str.get();
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PRInt32 len = (PRInt32)str.Length();
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if (len == 0) {
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return; // bail is empty string
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}
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// find how much text fits, the "position" is the size of the available area
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if (nsLayoutUtils::BinarySearchForPosition(&aRenderingContext, text, 0, 0, 0, len,
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PRInt32(contentWidth), indx, textWidth)) {
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if (indx < len-1 ) {
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// we can't fit in all the text
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if (indx > 3) {
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// But we can fit in at least 4 chars. Show all but 3 of them, then
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// an ellipsis.
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// XXXbz for non-plane0 text, this may be cutting things in the
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// middle of a codepoint! Also, we have no guarantees that the three
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// dots will fit in the space the three chars we removed took up with
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// these font metrics!
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str.Truncate(indx-3);
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str.AppendLiteral("...");
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} else {
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// We can only fit 3 or fewer chars. Just show nothing
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str.Truncate();
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}
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}
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} else {
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return; // bail if couldn't find the correct length
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}
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if (HasRTLChars(str)) {
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PresContext()->SetBidiEnabled();
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}
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// cacl the x and y positions of the text
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nscoord x = GetXPosition(aRenderingContext, aRect, aJust, str);
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nscoord y;
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if (aHeaderFooter == eHeader) {
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y = aRect.y + mPD->mExtraMargin.top + mPD->mEdgePaperMargin.top;
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} else {
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y = aRect.YMost() - aHeight - mPD->mExtraMargin.bottom - mPD->mEdgePaperMargin.bottom;
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}
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// set up new clip and draw the text
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aRenderingContext.PushState();
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aRenderingContext.SetColor(NS_RGB(0,0,0));
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aRenderingContext.IntersectClip(aRect);
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nsLayoutUtils::DrawString(this, &aRenderingContext, str.get(), str.Length(), nsPoint(x, y + aAscent));
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aRenderingContext.PopState();
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}
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}
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static void PaintPageContent(nsIFrame* aFrame, nsRenderingContext* aCtx,
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const nsRect& aDirtyRect, nsPoint aPt)
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{
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static_cast<nsPageFrame*>(aFrame)->PaintPageContent(*aCtx, aDirtyRect, aPt);
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}
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static void PaintHeaderFooter(nsIFrame* aFrame, nsRenderingContext* aCtx,
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const nsRect& aDirtyRect, nsPoint aPt)
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{
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static_cast<nsPageFrame*>(aFrame)->PaintHeaderFooter(*aCtx, aPt);
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}
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//------------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPageFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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nsDisplayListCollection set;
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nsresult rv;
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if (PresContext()->IsScreen()) {
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rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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rv = set.BorderBackground()->AppendNewToTop(new (aBuilder)
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nsDisplayGeneric(aBuilder, this, ::PaintPageContent,
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"PageContent",
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nsDisplayItem::TYPE_PAGE_CONTENT));
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NS_ENSURE_SUCCESS(rv, rv);
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if (PresContext()->IsRootPaginatedDocument()) {
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rv = set.Content()->AppendNewToTop(new (aBuilder)
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nsDisplayGeneric(aBuilder, this, ::PaintHeaderFooter,
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"HeaderFooter",
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nsDisplayItem::TYPE_HEADER_FOOTER));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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set.MoveTo(aLists);
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return NS_OK;
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}
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//------------------------------------------------------------------------------
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void
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nsPageFrame::SetPageNumInfo(PRInt32 aPageNumber, PRInt32 aTotalPages)
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{
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mPageNum = aPageNumber;
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mTotNumPages = aTotalPages;
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}
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void
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nsPageFrame::PaintHeaderFooter(nsRenderingContext& aRenderingContext,
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nsPoint aPt)
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{
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nsPresContext* pc = PresContext();
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if (!mPD->mPrintSettings) {
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if (pc->Type() == nsPresContext::eContext_PrintPreview || pc->IsDynamic())
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mPD->mPrintSettings = pc->GetPrintSettings();
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if (!mPD->mPrintSettings)
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return;
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}
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nsRect rect(aPt, mRect.Size());
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aRenderingContext.SetColor(NS_RGB(0,0,0));
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// Get the FontMetrics to determine width.height of strings
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nsRefPtr<nsFontMetrics> fontMet;
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pc->DeviceContext()->GetMetricsFor(*mPD->mHeadFootFont, nullptr,
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pc->GetUserFontSet(),
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*getter_AddRefs(fontMet));
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aRenderingContext.SetFont(fontMet);
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nscoord ascent = 0;
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nscoord visibleHeight = 0;
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if (fontMet) {
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visibleHeight = fontMet->MaxHeight();
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ascent = fontMet->MaxAscent();
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}
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// print document headers and footers
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nsXPIDLString headerLeft, headerCenter, headerRight;
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mPD->mPrintSettings->GetHeaderStrLeft(getter_Copies(headerLeft));
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mPD->mPrintSettings->GetHeaderStrCenter(getter_Copies(headerCenter));
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mPD->mPrintSettings->GetHeaderStrRight(getter_Copies(headerRight));
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DrawHeaderFooter(aRenderingContext, eHeader,
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headerLeft, headerCenter, headerRight,
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rect, ascent, visibleHeight);
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nsXPIDLString footerLeft, footerCenter, footerRight;
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mPD->mPrintSettings->GetFooterStrLeft(getter_Copies(footerLeft));
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mPD->mPrintSettings->GetFooterStrCenter(getter_Copies(footerCenter));
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mPD->mPrintSettings->GetFooterStrRight(getter_Copies(footerRight));
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DrawHeaderFooter(aRenderingContext, eFooter,
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footerLeft, footerCenter, footerRight,
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rect, ascent, visibleHeight);
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}
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//------------------------------------------------------------------------------
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void
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nsPageFrame::PaintPageContent(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsPoint aPt) {
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|
nsIFrame* pageContentFrame = mFrames.FirstChild();
|
|
nsRect rect = aDirtyRect;
|
|
float scale = PresContext()->GetPageScale();
|
|
aRenderingContext.PushState();
|
|
nsPoint framePos = aPt + pageContentFrame->GetOffsetTo(this);
|
|
aRenderingContext.Translate(framePos);
|
|
// aPt translates to coords relative to this, then margins translate to
|
|
// pageContentFrame's coords
|
|
rect -= framePos;
|
|
aRenderingContext.Scale(scale, scale);
|
|
rect.ScaleRoundOut(1.0f / scale);
|
|
// Make sure we don't draw where we aren't supposed to draw, especially
|
|
// when printing selection
|
|
nsRect clipRect(nsPoint(0, 0), pageContentFrame->GetSize());
|
|
// Note: this computation matches how we compute maxSize.height
|
|
// in nsPageFrame::Reflow
|
|
nscoord expectedPageContentHeight =
|
|
NSToCoordCeil((GetSize().height - mPD->mReflowMargin.TopBottom()) / scale);
|
|
if (clipRect.height > expectedPageContentHeight) {
|
|
// We're doing print-selection, with one long page-content frame.
|
|
// Clip to the appropriate page-content slice for the current page.
|
|
NS_ASSERTION(mPageNum > 0, "page num should be positive");
|
|
// Note: The pageContentFrame's y-position has been set such that a zero
|
|
// y-value matches the top edge of the current page. So, to clip to the
|
|
// current page's content (in coordinates *relative* to the page content
|
|
// frame), we just negate its y-position and add the top margin.
|
|
clipRect.y = NSToCoordCeil((-pageContentFrame->GetRect().y +
|
|
mPD->mReflowMargin.top) / scale);
|
|
clipRect.height = expectedPageContentHeight;
|
|
NS_ASSERTION(clipRect.y < pageContentFrame->GetSize().height,
|
|
"Should be clipping to region inside the page content bounds");
|
|
}
|
|
aRenderingContext.IntersectClip(clipRect);
|
|
|
|
nsRect backgroundRect = nsRect(nsPoint(0, 0), pageContentFrame->GetSize());
|
|
nsCSSRendering::PaintBackground(PresContext(), aRenderingContext, this,
|
|
rect, backgroundRect,
|
|
nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES);
|
|
|
|
nsLayoutUtils::PaintFrame(&aRenderingContext, pageContentFrame,
|
|
nsRegion(rect), NS_RGBA(0,0,0,0),
|
|
nsLayoutUtils::PAINT_SYNC_DECODE_IMAGES);
|
|
|
|
aRenderingContext.PopState();
|
|
}
|
|
|
|
void
|
|
nsPageFrame::SetSharedPageData(nsSharedPageData* aPD)
|
|
{
|
|
mPD = aPD;
|
|
// Set the shared data into the page frame before reflow
|
|
nsPageContentFrame * pcf = static_cast<nsPageContentFrame*>(mFrames.FirstChild());
|
|
if (pcf) {
|
|
pcf->SetSharedPageData(mPD);
|
|
}
|
|
|
|
}
|
|
|
|
nsIFrame*
|
|
NS_NewPageBreakFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
NS_PRECONDITION(aPresShell, "null PresShell");
|
|
//check that we are only creating page break frames when printing
|
|
NS_ASSERTION(aPresShell->GetPresContext()->IsPaginated(), "created a page break frame while not printing");
|
|
|
|
return new (aPresShell) nsPageBreakFrame(aContext);
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsPageBreakFrame)
|
|
|
|
nsPageBreakFrame::nsPageBreakFrame(nsStyleContext* aContext) :
|
|
nsLeafFrame(aContext), mHaveReflowed(false)
|
|
{
|
|
}
|
|
|
|
nsPageBreakFrame::~nsPageBreakFrame()
|
|
{
|
|
}
|
|
|
|
nscoord
|
|
nsPageBreakFrame::GetIntrinsicWidth()
|
|
{
|
|
return nsPresContext::CSSPixelsToAppUnits(1);
|
|
}
|
|
|
|
nscoord
|
|
nsPageBreakFrame::GetIntrinsicHeight()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
nsresult
|
|
nsPageBreakFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsPageBreakFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
|
|
|
|
// Override reflow, since we don't want to deal with what our
|
|
// computed values are.
|
|
aDesiredSize.width = GetIntrinsicWidth();
|
|
aDesiredSize.height = (aReflowState.availableHeight == NS_UNCONSTRAINEDSIZE ?
|
|
0 : aReflowState.availableHeight);
|
|
// round the height down to the nearest pixel
|
|
aDesiredSize.height -=
|
|
aDesiredSize.height % nsPresContext::CSSPixelsToAppUnits(1);
|
|
|
|
// Note: not using NS_FRAME_FIRST_REFLOW here, since it's not clear whether
|
|
// DidReflow will always get called before the next Reflow() call.
|
|
mHaveReflowed = true;
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIAtom*
|
|
nsPageBreakFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::pageBreakFrame;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsPageBreakFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("PageBreak"), aResult);
|
|
}
|
|
#endif
|