/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim:set ts=4 sw=2 sts=2 et cindent: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "nsTextBoxFrame.h" #include "gfx2DGlue.h" #include "gfxUtils.h" #include "mozilla/intl/BidiEmbeddingLevel.h" #include "mozilla/Attributes.h" #include "mozilla/ComputedStyle.h" #include "mozilla/Preferences.h" #include "mozilla/PresShell.h" #include "mozilla/intl/Segmenter.h" #include "mozilla/layers/RenderRootStateManager.h" #include "mozilla/gfx/2D.h" #include "nsFontMetrics.h" #include "nsReadableUtils.h" #include "nsCOMPtr.h" #include "nsCRT.h" #include "nsGkAtoms.h" #include "nsPresContext.h" #include "gfxContext.h" #include "nsIContent.h" #include "nsNameSpaceManager.h" #include "nsBoxLayoutState.h" #include "nsMenuBarListener.h" #include "nsString.h" #include "nsITheme.h" #include "nsUnicharUtils.h" #include "nsContentUtils.h" #include "nsDisplayList.h" #include "nsCSSRendering.h" #include "nsIReflowCallback.h" #include "nsBoxFrame.h" #include "nsLayoutUtils.h" #include "TextDrawTarget.h" #ifdef ACCESSIBILITY # include "nsAccessibilityService.h" #endif #include "nsBidiUtils.h" #include "nsBidiPresUtils.h" using namespace mozilla; using namespace mozilla::gfx; class nsAccessKeyInfo { public: int32_t mAccesskeyIndex; nscoord mBeforeWidth, mAccessWidth, mAccessUnderlineSize, mAccessOffset; }; bool nsTextBoxFrame::gAlwaysAppendAccessKey = false; bool nsTextBoxFrame::gAccessKeyPrefInitialized = false; bool nsTextBoxFrame::gInsertSeparatorBeforeAccessKey = false; bool nsTextBoxFrame::gInsertSeparatorPrefInitialized = false; nsIFrame* NS_NewTextBoxFrame(PresShell* aPresShell, ComputedStyle* aStyle) { return new (aPresShell) nsTextBoxFrame(aStyle, aPresShell->GetPresContext()); } NS_IMPL_FRAMEARENA_HELPERS(nsTextBoxFrame) NS_QUERYFRAME_HEAD(nsTextBoxFrame) NS_QUERYFRAME_ENTRY(nsTextBoxFrame) NS_QUERYFRAME_TAIL_INHERITING(nsLeafBoxFrame) nsresult nsTextBoxFrame::AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute, int32_t aModType) { bool aResize; bool aRedraw; UpdateAttributes(aAttribute, aResize, aRedraw); if (aResize) { PresShell()->FrameNeedsReflow( this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY); } else if (aRedraw) { nsBoxLayoutState state(PresContext()); XULRedraw(state); } return NS_OK; } nsTextBoxFrame::nsTextBoxFrame(ComputedStyle* aStyle, nsPresContext* aPresContext) : nsLeafBoxFrame(aStyle, aPresContext, kClassID), mAccessKeyInfo(nullptr), mCropType(CropRight), mAscent(0), mNeedsReflowCallback(false) { MarkIntrinsicISizesDirty(); } nsTextBoxFrame::~nsTextBoxFrame() { delete mAccessKeyInfo; } void nsTextBoxFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, nsIFrame* aPrevInFlow) { nsLeafBoxFrame::Init(aContent, aParent, aPrevInFlow); bool aResize; bool aRedraw; UpdateAttributes(nullptr, aResize, aRedraw); /* update all */ } bool nsTextBoxFrame::AlwaysAppendAccessKey() { if (!gAccessKeyPrefInitialized) { gAccessKeyPrefInitialized = true; const char* prefName = "intl.menuitems.alwaysappendaccesskeys"; nsAutoString val; Preferences::GetLocalizedString(prefName, val); gAlwaysAppendAccessKey = val.EqualsLiteral("true"); } return gAlwaysAppendAccessKey; } bool nsTextBoxFrame::InsertSeparatorBeforeAccessKey() { if (!gInsertSeparatorPrefInitialized) { gInsertSeparatorPrefInitialized = true; const char* prefName = "intl.menuitems.insertseparatorbeforeaccesskeys"; nsAutoString val; Preferences::GetLocalizedString(prefName, val); gInsertSeparatorBeforeAccessKey = val.EqualsLiteral("true"); } return gInsertSeparatorBeforeAccessKey; } class nsAsyncAccesskeyUpdate final : public nsIReflowCallback { public: explicit nsAsyncAccesskeyUpdate(nsIFrame* aFrame) : mWeakFrame(aFrame) {} virtual bool ReflowFinished() override { bool shouldFlush = false; nsTextBoxFrame* frame = static_cast(mWeakFrame.GetFrame()); if (frame) { shouldFlush = frame->UpdateAccesskey(mWeakFrame); } delete this; return shouldFlush; } virtual void ReflowCallbackCanceled() override { delete this; } WeakFrame mWeakFrame; }; bool nsTextBoxFrame::UpdateAccesskey(WeakFrame& aWeakThis) { nsAutoString accesskey; mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accesskey); if (!accesskey.Equals(mAccessKey)) { // Need to get clean mTitle. RecomputeTitle(); mAccessKey = accesskey; UpdateAccessTitle(); PresShell()->FrameNeedsReflow( this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY); return true; } return false; } void nsTextBoxFrame::UpdateAttributes(nsAtom* aAttribute, bool& aResize, bool& aRedraw) { bool doUpdateTitle = false; aResize = false; aRedraw = false; if (aAttribute == nullptr || aAttribute == nsGkAtoms::crop) { static dom::Element::AttrValuesArray strings[] = { nsGkAtoms::left, nsGkAtoms::start, nsGkAtoms::center, nsGkAtoms::right, nsGkAtoms::end, nsGkAtoms::none, nullptr}; CroppingStyle cropType; switch (mContent->AsElement()->FindAttrValueIn( kNameSpaceID_None, nsGkAtoms::crop, strings, eCaseMatters)) { case 0: case 1: cropType = CropLeft; break; case 2: cropType = CropCenter; break; case 3: case 4: cropType = CropRight; break; case 5: cropType = CropNone; break; default: cropType = CropAuto; break; } if (cropType != mCropType) { aResize = true; mCropType = cropType; } } if (aAttribute == nullptr || aAttribute == nsGkAtoms::value) { RecomputeTitle(); doUpdateTitle = true; } if (aAttribute == nullptr || aAttribute == nsGkAtoms::accesskey) { mNeedsReflowCallback = true; // Ensure that layout is refreshed and reflow callback called. aResize = true; } if (doUpdateTitle) { UpdateAccessTitle(); aResize = true; } } namespace mozilla { class nsDisplayXULTextBox final : public nsPaintedDisplayItem { public: nsDisplayXULTextBox(nsDisplayListBuilder* aBuilder, nsTextBoxFrame* aFrame) : nsPaintedDisplayItem(aBuilder, aFrame) { MOZ_COUNT_CTOR(nsDisplayXULTextBox); } #ifdef NS_BUILD_REFCNT_LOGGING MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayXULTextBox) #endif virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override; virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) const override; NS_DISPLAY_DECL_NAME("XULTextBox", TYPE_XUL_TEXT_BOX) virtual nsRect GetComponentAlphaBounds( nsDisplayListBuilder* aBuilder) const override; void PaintTextToContext(gfxContext* aCtx, nsPoint aOffset, const nscolor* aColor); virtual bool CreateWebRenderCommands( mozilla::wr::DisplayListBuilder& aBuilder, mozilla::wr::IpcResourceUpdateQueue& aResources, const StackingContextHelper& aSc, mozilla::layers::RenderRootStateManager* aManager, nsDisplayListBuilder* aDisplayListBuilder) override; }; static void PaintTextShadowCallback(gfxContext* aCtx, nsPoint aShadowOffset, const nscolor& aShadowColor, void* aData) { reinterpret_cast(aData)->PaintTextToContext( aCtx, aShadowOffset, &aShadowColor); } void nsDisplayXULTextBox::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) { // Paint the text shadow before doing any foreground stuff nsRect drawRect = static_cast(mFrame)->mTextDrawRect + ToReferenceFrame(); nsLayoutUtils::PaintTextShadow(mFrame, aCtx, drawRect, GetPaintRect(aBuilder, aCtx), mFrame->StyleText()->mColor.ToColor(), PaintTextShadowCallback, (void*)this); PaintTextToContext(aCtx, nsPoint(0, 0), nullptr); } void nsDisplayXULTextBox::PaintTextToContext(gfxContext* aCtx, nsPoint aOffset, const nscolor* aColor) { static_cast(mFrame)->PaintTitle( *aCtx, mFrame->InkOverflowRectRelativeToSelf() + ToReferenceFrame(), ToReferenceFrame() + aOffset, aColor); } bool nsDisplayXULTextBox::CreateWebRenderCommands( mozilla::wr::DisplayListBuilder& aBuilder, mozilla::wr::IpcResourceUpdateQueue& aResources, const StackingContextHelper& aSc, mozilla::layers::RenderRootStateManager* aManager, nsDisplayListBuilder* aDisplayListBuilder) { bool snap = false; auto bounds = GetBounds(aDisplayListBuilder, &snap); if (bounds.IsEmpty()) { return true; } auto appUnitsPerDevPixel = Frame()->PresContext()->AppUnitsPerDevPixel(); gfx::Point deviceOffset = LayoutDevicePoint::FromAppUnits(bounds.TopLeft(), appUnitsPerDevPixel) .ToUnknownPoint(); RefPtr textDrawer = new mozilla::layout::TextDrawTarget(aBuilder, aResources, aSc, aManager, this, bounds); RefPtr captureCtx = gfxContext::CreateOrNull(textDrawer, deviceOffset); Paint(aDisplayListBuilder, captureCtx); textDrawer->TerminateShadows(); return textDrawer->Finish(); } nsRect nsDisplayXULTextBox::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) const { *aSnap = false; return mFrame->InkOverflowRectRelativeToSelf() + ToReferenceFrame(); } nsRect nsDisplayXULTextBox::GetComponentAlphaBounds( nsDisplayListBuilder* aBuilder) const { return static_cast(mFrame)->GetComponentAlphaBounds() + ToReferenceFrame(); } } // namespace mozilla void nsTextBoxFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) { if (!IsVisibleForPainting()) return; nsLeafBoxFrame::BuildDisplayList(aBuilder, aLists); aLists.Content()->AppendNewToTop(aBuilder, this); } void nsTextBoxFrame::PaintTitle(gfxContext& aRenderingContext, const nsRect& aDirtyRect, nsPoint aPt, const nscolor* aOverrideColor) { if (mTitle.IsEmpty()) return; DrawText(aRenderingContext, aDirtyRect, mTextDrawRect + aPt, aOverrideColor); } void nsTextBoxFrame::DrawText(gfxContext& aRenderingContext, const nsRect& aDirtyRect, const nsRect& aTextRect, const nscolor* aOverrideColor) { nsPresContext* presContext = PresContext(); int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel(); DrawTarget* drawTarget = aRenderingContext.GetDrawTarget(); // paint the title nscolor overColor = 0; nscolor underColor = 0; nscolor strikeColor = 0; auto overStyle = StyleTextDecorationStyle::None; auto underStyle = StyleTextDecorationStyle::None; auto strikeStyle = StyleTextDecorationStyle::None; // Begin with no decorations auto decorations = StyleTextDecorationLine::NONE; // A mask of all possible line decorations. auto decorMask = StyleTextDecorationLine::UNDERLINE | StyleTextDecorationLine::OVERLINE | StyleTextDecorationLine::LINE_THROUGH; WritingMode wm = GetWritingMode(); bool vertical = wm.IsVertical(); nsIFrame* f = this; do { // find decoration colors ComputedStyle* context = f->Style(); if (!context->HasTextDecorationLines()) { break; } const nsStyleTextReset* styleText = context->StyleTextReset(); // a decoration defined here if (decorMask & styleText->mTextDecorationLine) { nscolor color; if (aOverrideColor) { color = *aOverrideColor; } else { color = styleText->mTextDecorationColor.CalcColor(*context); } const auto style = styleText->mTextDecorationStyle; if (StyleTextDecorationLine::UNDERLINE & decorMask & styleText->mTextDecorationLine) { underColor = color; underStyle = style; decorMask &= ~StyleTextDecorationLine::UNDERLINE; decorations |= StyleTextDecorationLine::UNDERLINE; } if (StyleTextDecorationLine::OVERLINE & decorMask & styleText->mTextDecorationLine) { overColor = color; overStyle = style; decorMask &= ~StyleTextDecorationLine::OVERLINE; decorations |= StyleTextDecorationLine::OVERLINE; } if (StyleTextDecorationLine::LINE_THROUGH & decorMask & styleText->mTextDecorationLine) { strikeColor = color; strikeStyle = style; decorMask &= ~StyleTextDecorationLine::LINE_THROUGH; decorations |= StyleTextDecorationLine::LINE_THROUGH; } } } while (decorMask && (f = nsLayoutUtils::GetParentOrPlaceholderFor(f))); RefPtr fontMet = nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f); fontMet->SetVertical(wm.IsVertical()); fontMet->SetTextOrientation(StyleVisibility()->mTextOrientation); nscoord offset; nscoord size; nscoord ascent = fontMet->MaxAscent(); nsPoint baselinePt; if (wm.IsVertical()) { baselinePt.x = presContext->RoundAppUnitsToNearestDevPixels( aTextRect.x + (wm.IsVerticalRL() ? aTextRect.width - ascent : ascent)); baselinePt.y = aTextRect.y; } else { baselinePt.x = aTextRect.x; baselinePt.y = presContext->RoundAppUnitsToNearestDevPixels(aTextRect.y + ascent); } nsCSSRendering::PaintDecorationLineParams params; params.dirtyRect = ToRect(presContext->AppUnitsToGfxUnits(aDirtyRect)); params.pt = Point(presContext->AppUnitsToGfxUnits(aTextRect.x), presContext->AppUnitsToGfxUnits(aTextRect.y)); params.icoordInFrame = Float(PresContext()->AppUnitsToGfxUnits(mTextDrawRect.x)); params.lineSize = Size(presContext->AppUnitsToGfxUnits(aTextRect.width), 0); params.ascent = presContext->AppUnitsToGfxUnits(ascent); params.vertical = vertical; // XXX todo: vertical-mode support for decorations not tested yet, // probably won't be positioned correctly // Underlines are drawn before overlines, and both before the text // itself, per http://www.w3.org/TR/CSS21/zindex.html point 7.2.1.4.1.1. // (We don't apply this rule to the access-key underline because we only // find out where that is as a side effect of drawing the text, in the // general case -- see below.) if (decorations & (StyleTextDecorationLine::OVERLINE | StyleTextDecorationLine::UNDERLINE)) { fontMet->GetUnderline(offset, size); params.lineSize.height = presContext->AppUnitsToGfxUnits(size); if ((decorations & StyleTextDecorationLine::UNDERLINE) && underStyle != StyleTextDecorationStyle::None) { params.color = underColor; params.offset = presContext->AppUnitsToGfxUnits(offset); params.decoration = StyleTextDecorationLine::UNDERLINE; params.style = underStyle; nsCSSRendering::PaintDecorationLine(this, *drawTarget, params); } if ((decorations & StyleTextDecorationLine::OVERLINE) && overStyle != StyleTextDecorationStyle::None) { params.color = overColor; params.offset = params.ascent; params.decoration = StyleTextDecorationLine::OVERLINE; params.style = overStyle; nsCSSRendering::PaintDecorationLine(this, *drawTarget, params); } } RefPtr refContext = PresShell()->CreateReferenceRenderingContext(); DrawTarget* refDrawTarget = refContext->GetDrawTarget(); CalculateUnderline(refDrawTarget, *fontMet); DeviceColor color = ToDeviceColor( aOverrideColor ? *aOverrideColor : StyleText()->mColor.ToColor()); ColorPattern colorPattern(color); aRenderingContext.SetDeviceColor(color); nsresult rv = NS_ERROR_FAILURE; if (mState & NS_FRAME_IS_BIDI) { presContext->SetBidiEnabled(); mozilla::intl::BidiEmbeddingLevel level = nsBidiPresUtils::BidiLevelFromStyle(Style()); if (mAccessKeyInfo && mAccessKeyInfo->mAccesskeyIndex != kNotFound) { // We let the RenderText function calculate the mnemonic's // underline position for us. nsBidiPositionResolve posResolve; posResolve.logicalIndex = mAccessKeyInfo->mAccesskeyIndex; rv = nsBidiPresUtils::RenderText( mCroppedTitle.get(), mCroppedTitle.Length(), level, presContext, aRenderingContext, refDrawTarget, *fontMet, baselinePt.x, baselinePt.y, &posResolve, 1); mAccessKeyInfo->mBeforeWidth = posResolve.visualLeftTwips; mAccessKeyInfo->mAccessWidth = posResolve.visualWidth; } else { rv = nsBidiPresUtils::RenderText( mCroppedTitle.get(), mCroppedTitle.Length(), level, presContext, aRenderingContext, refDrawTarget, *fontMet, baselinePt.x, baselinePt.y); } } if (NS_FAILED(rv)) { fontMet->SetTextRunRTL(false); if (mAccessKeyInfo && mAccessKeyInfo->mAccesskeyIndex != kNotFound) { // In the simple (non-BiDi) case, we calculate the mnemonic's // underline position by getting the text metric. // XXX are attribute values always two byte? if (mAccessKeyInfo->mAccesskeyIndex > 0) mAccessKeyInfo->mBeforeWidth = nsLayoutUtils::AppUnitWidthOfString( mCroppedTitle.get(), mAccessKeyInfo->mAccesskeyIndex, *fontMet, refDrawTarget); else mAccessKeyInfo->mBeforeWidth = 0; } fontMet->DrawString(mCroppedTitle.get(), mCroppedTitle.Length(), baselinePt.x, baselinePt.y, &aRenderingContext, refDrawTarget); } if (mAccessKeyInfo && mAccessKeyInfo->mAccesskeyIndex != kNotFound) { nsRect r(aTextRect.x + mAccessKeyInfo->mBeforeWidth, aTextRect.y + mAccessKeyInfo->mAccessOffset, mAccessKeyInfo->mAccessWidth, mAccessKeyInfo->mAccessUnderlineSize); Rect devPxRect = NSRectToSnappedRect(r, appUnitsPerDevPixel, *drawTarget); drawTarget->FillRect(devPxRect, colorPattern); } // Strikeout is drawn on top of the text, per // http://www.w3.org/TR/CSS21/zindex.html point 7.2.1.4.1.1. if ((decorations & StyleTextDecorationLine::LINE_THROUGH) && strikeStyle != StyleTextDecorationStyle::None) { fontMet->GetStrikeout(offset, size); params.color = strikeColor; params.lineSize.height = presContext->AppUnitsToGfxUnits(size); params.offset = presContext->AppUnitsToGfxUnits(offset); params.decoration = StyleTextDecorationLine::LINE_THROUGH; params.style = strikeStyle; nsCSSRendering::PaintDecorationLine(this, *drawTarget, params); } } void nsTextBoxFrame::CalculateUnderline(DrawTarget* aDrawTarget, nsFontMetrics& aFontMetrics) { if (mAccessKeyInfo && mAccessKeyInfo->mAccesskeyIndex != kNotFound) { // Calculate all fields of mAccessKeyInfo which // are the same for both BiDi and non-BiDi frames. const char16_t* titleString = mCroppedTitle.get(); aFontMetrics.SetTextRunRTL(false); mAccessKeyInfo->mAccessWidth = nsLayoutUtils::AppUnitWidthOfString( titleString[mAccessKeyInfo->mAccesskeyIndex], aFontMetrics, aDrawTarget); nscoord offset, baseline; aFontMetrics.GetUnderline(offset, mAccessKeyInfo->mAccessUnderlineSize); baseline = aFontMetrics.MaxAscent(); mAccessKeyInfo->mAccessOffset = baseline - offset; } } void nsTextBoxFrame::CropStringForWidth(nsAString& aText, gfxContext& aRenderingContext, nsFontMetrics& aFontMetrics, nscoord aWidth, CroppingStyle aCropType) { DrawTarget* drawTarget = aRenderingContext.GetDrawTarget(); // See if the width is even smaller than the ellipsis // If so, clear the text completely. const nsDependentString& kEllipsis = nsContentUtils::GetLocalizedEllipsis(); aFontMetrics.SetTextRunRTL(false); nscoord ellipsisWidth = nsLayoutUtils::AppUnitWidthOfString(kEllipsis, aFontMetrics, drawTarget); if (ellipsisWidth > aWidth) { aText.Truncate(0); return; } if (ellipsisWidth == aWidth) { aText.Assign(kEllipsis); return; } // We will be drawing an ellipsis, thank you very much. // Subtract out the required width of the ellipsis. // This is the total remaining width we have to play with. aWidth -= ellipsisWidth; using mozilla::intl::GraphemeClusterBreakIteratorUtf16; using mozilla::intl::GraphemeClusterBreakReverseIteratorUtf16; // Now we crop. This is quite basic: it will not be really accurate in the // presence of complex scripts with contextual shaping, etc., as it measures // each grapheme cluster in isolation, not in its proper context. switch (aCropType) { case CropAuto: case CropNone: case CropRight: { const Span text(aText); GraphemeClusterBreakIteratorUtf16 iter(text); uint32_t pos = 0; nscoord totalWidth = 0; while (Maybe nextPos = iter.Next()) { const nscoord charWidth = nsLayoutUtils::AppUnitWidthOfString( text.FromTo(pos, *nextPos), aFontMetrics, drawTarget); if (totalWidth + charWidth > aWidth) { break; } pos = *nextPos; totalWidth += charWidth; } if (pos < aText.Length()) { aText.Replace(pos, aText.Length() - pos, kEllipsis); } } break; case CropLeft: { const Span text(aText); GraphemeClusterBreakReverseIteratorUtf16 iter(text); uint32_t pos = text.Length(); nscoord totalWidth = 0; // nextPos is decreasing since we use a reverse iterator. while (Maybe nextPos = iter.Next()) { const nscoord charWidth = nsLayoutUtils::AppUnitWidthOfString( text.FromTo(*nextPos, pos), aFontMetrics, drawTarget); if (totalWidth + charWidth > aWidth) { break; } pos = *nextPos; totalWidth += charWidth; } if (pos > 0) { aText.Replace(0, pos, kEllipsis); } } break; case CropCenter: { const Span text(aText); nscoord totalWidth = 0; GraphemeClusterBreakIteratorUtf16 leftIter(text); GraphemeClusterBreakReverseIteratorUtf16 rightIter(text); uint32_t leftPos = 0; uint32_t rightPos = text.Length(); while (leftPos < rightPos) { Maybe nextPos = leftIter.Next(); nscoord charWidth = nsLayoutUtils::AppUnitWidthOfString( text.FromTo(leftPos, *nextPos), aFontMetrics, drawTarget); if (totalWidth + charWidth > aWidth) { break; } leftPos = *nextPos; totalWidth += charWidth; if (leftPos >= rightPos) { break; } nextPos = rightIter.Next(); charWidth = nsLayoutUtils::AppUnitWidthOfString( text.FromTo(*nextPos, rightPos), aFontMetrics, drawTarget); if (totalWidth + charWidth > aWidth) { break; } rightPos = *nextPos; totalWidth += charWidth; } if (leftPos < rightPos) { aText.Replace(leftPos, rightPos - leftPos, kEllipsis); } } break; } } nscoord nsTextBoxFrame::CalculateTitleForWidth(gfxContext& aRenderingContext, nscoord aMaxWidth) { if (mTitle.IsEmpty()) { mCroppedTitle.Truncate(); return 0; } RefPtr fm = nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f); // See if the text needs to be cropped to fit in the width given. mCroppedTitle = mTitle; nscoord width = nsLayoutUtils::AppUnitWidthOfStringBidi( mCroppedTitle, this, *fm, aRenderingContext); if (width > aMaxWidth && mCropType != CropNone) { CropStringForWidth(mCroppedTitle, aRenderingContext, *fm, aMaxWidth, mCropType); width = nsLayoutUtils::AppUnitWidthOfStringBidi(mCroppedTitle, this, *fm, aRenderingContext); } if (StyleVisibility()->mDirection == StyleDirection::Rtl || HasRTLChars(mCroppedTitle)) { AddStateBits(NS_FRAME_IS_BIDI); } return width; } #define OLD_ELLIPSIS u"..."_ns // the following block is to append the accesskey to mTitle if there is an // accesskey but the mTitle doesn't have the character void nsTextBoxFrame::UpdateAccessTitle() { /* * Note that if you change appending access key label spec, * you need to maintain same logic in following methods. See bug 324159. * toolkit/components/prompts/src/CommonDialog.jsm (setLabelForNode) * toolkit/content/widgets/text.js (formatAccessKey) */ int32_t menuAccessKey = nsMenuBarListener::GetMenuAccessKey(); if (!menuAccessKey || mAccessKey.IsEmpty()) return; if (!AlwaysAppendAccessKey() && FindInReadable(mAccessKey, mTitle, nsCaseInsensitiveStringComparator)) return; nsAutoString accessKeyLabel; accessKeyLabel += '('; accessKeyLabel += mAccessKey; ToUpperCase(accessKeyLabel); accessKeyLabel += ')'; if (mTitle.IsEmpty()) { mTitle = accessKeyLabel; return; } if (StringEndsWith(mTitle, accessKeyLabel)) { // Never append another "(X)" if the title already ends with "(X)". return; } const nsDependentString& kEllipsis = nsContentUtils::GetLocalizedEllipsis(); uint32_t offset = mTitle.Length(); if (StringEndsWith(mTitle, kEllipsis)) { offset -= kEllipsis.Length(); } else if (StringEndsWith(mTitle, OLD_ELLIPSIS)) { // Try to check with our old ellipsis (for old addons) offset -= OLD_ELLIPSIS.Length(); } else { // Try to check with // our default ellipsis (for non-localized addons) or ':' const char16_t kLastChar = mTitle.Last(); if (kLastChar == char16_t(0x2026) || kLastChar == char16_t(':')) offset--; } if (InsertSeparatorBeforeAccessKey() && offset > 0 && !NS_IS_SPACE(mTitle[offset - 1])) { mTitle.Insert(' ', offset); offset++; } mTitle.Insert(accessKeyLabel, offset); } void nsTextBoxFrame::UpdateAccessIndex() { int32_t menuAccessKey = nsMenuBarListener::GetMenuAccessKey(); if (menuAccessKey) { if (mAccessKey.IsEmpty()) { if (mAccessKeyInfo) { delete mAccessKeyInfo; mAccessKeyInfo = nullptr; } } else { if (!mAccessKeyInfo) { mAccessKeyInfo = new nsAccessKeyInfo(); if (!mAccessKeyInfo) return; } nsAString::const_iterator start, end; mCroppedTitle.BeginReading(start); mCroppedTitle.EndReading(end); // remember the beginning of the string nsAString::const_iterator originalStart = start; bool found; if (!AlwaysAppendAccessKey()) { // not appending access key - do case-sensitive search // first found = FindInReadable(mAccessKey, start, end); if (!found) { // didn't find it - perform a case-insensitive search start = originalStart; found = FindInReadable(mAccessKey, start, end, nsCaseInsensitiveStringComparator); } } else { found = RFindInReadable(mAccessKey, start, end, nsCaseInsensitiveStringComparator); } if (found) mAccessKeyInfo->mAccesskeyIndex = Distance(originalStart, start); else mAccessKeyInfo->mAccesskeyIndex = kNotFound; } } } void nsTextBoxFrame::RecomputeTitle() { mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::value, mTitle); // This doesn't handle language-specific uppercasing/lowercasing // rules, unlike textruns. StyleTextTransform textTransform = StyleText()->mTextTransform; if (textTransform.case_ == StyleTextTransformCase::Uppercase) { ToUpperCase(mTitle); } else if (textTransform.case_ == StyleTextTransformCase::Lowercase) { ToLowerCase(mTitle); } // We can't handle StyleTextTransformCase::Capitalize because we // have no clue about word boundaries here. We also don't handle // the full-width or full-size-kana transforms. } void nsTextBoxFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) { nsLeafBoxFrame::DidSetComputedStyle(aOldComputedStyle); if (!aOldComputedStyle) { // We're just being initialized return; } const nsStyleText* oldTextStyle = aOldComputedStyle->StyleText(); if (oldTextStyle->mTextTransform != StyleText()->mTextTransform) { RecomputeTitle(); UpdateAccessTitle(); } } NS_IMETHODIMP nsTextBoxFrame::DoXULLayout(nsBoxLayoutState& aBoxLayoutState) { if (mNeedsReflowCallback) { nsIReflowCallback* cb = new nsAsyncAccesskeyUpdate(this); if (cb) { PresShell()->PostReflowCallback(cb); } mNeedsReflowCallback = false; } nsresult rv = nsLeafBoxFrame::DoXULLayout(aBoxLayoutState); CalcDrawRect(*aBoxLayoutState.GetRenderingContext()); const nsStyleText* textStyle = StyleText(); nsRect scrollBounds(nsPoint(0, 0), GetSize()); nsRect textRect = mTextDrawRect; RefPtr fontMet = nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f); nsBoundingMetrics metrics = fontMet->GetInkBoundsForInkOverflow( mCroppedTitle.get(), mCroppedTitle.Length(), aBoxLayoutState.GetRenderingContext()->GetDrawTarget()); WritingMode wm = GetWritingMode(); LogicalRect tr(wm, textRect, GetSize()); tr.IStart(wm) -= metrics.leftBearing; tr.ISize(wm) = metrics.width; // In DrawText() we always draw with the baseline at MaxAscent() (relative to // mTextDrawRect), tr.BStart(wm) += fontMet->MaxAscent() - metrics.ascent; tr.BSize(wm) = metrics.ascent + metrics.descent; textRect = tr.GetPhysicalRect(wm, GetSize()); // Our scrollable overflow is our bounds; our ink overflow may // extend beyond that. nsRect visualBounds; visualBounds.UnionRect(scrollBounds, textRect); OverflowAreas overflow(visualBounds, scrollBounds); if (textStyle->HasTextShadow()) { // text-shadow extends our visual but not scrollable bounds nsRect& vis = overflow.InkOverflow(); vis.UnionRect(vis, nsLayoutUtils::GetTextShadowRectsUnion(mTextDrawRect, this)); } FinishAndStoreOverflow(overflow, GetSize()); return rv; } nsRect nsTextBoxFrame::GetComponentAlphaBounds() const { if (StyleText()->HasTextShadow()) { return InkOverflowRectRelativeToSelf(); } return mTextDrawRect; } bool nsTextBoxFrame::XULComputesOwnOverflowArea() { return true; } /* virtual */ void nsTextBoxFrame::MarkIntrinsicISizesDirty() { mNeedsRecalc = true; nsLeafBoxFrame::MarkIntrinsicISizesDirty(); } void nsTextBoxFrame::GetTextSize(gfxContext& aRenderingContext, const nsString& aString, nsSize& aSize, nscoord& aAscent) { RefPtr fontMet = nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f); aSize.height = fontMet->MaxHeight(); aSize.width = nsLayoutUtils::AppUnitWidthOfStringBidi(aString, this, *fontMet, aRenderingContext); aAscent = fontMet->MaxAscent(); } void nsTextBoxFrame::CalcTextSize(nsBoxLayoutState& aBoxLayoutState) { if (mNeedsRecalc) { nsSize size; gfxContext* rendContext = aBoxLayoutState.GetRenderingContext(); if (rendContext) { GetTextSize(*rendContext, mTitle, size, mAscent); if (GetWritingMode().IsVertical()) { std::swap(size.width, size.height); } mTextSize = size; mNeedsRecalc = false; } } } void nsTextBoxFrame::CalcDrawRect(gfxContext& aRenderingContext) { WritingMode wm = GetWritingMode(); LogicalRect textRect(wm, LogicalPoint(wm, 0, 0), GetLogicalSize(wm)); nsMargin borderPadding; GetXULBorderAndPadding(borderPadding); textRect.Deflate(wm, LogicalMargin(wm, borderPadding)); // determine (cropped) title and underline position // determine (cropped) title which fits in aRect, and its width // (where "width" is the text measure along its baseline, i.e. actually // a physical height in vertical writing modes) nscoord titleWidth = CalculateTitleForWidth(aRenderingContext, textRect.ISize(wm)); #ifdef ACCESSIBILITY // Make sure to update the accessible tree in case when cropped title is // changed. nsAccessibilityService* accService = GetAccService(); if (accService) { accService->UpdateLabelValue(PresShell(), mContent, mCroppedTitle); } #endif // determine if and at which position to put the underline UpdateAccessIndex(); // make the rect as small as our (cropped) text. nscoord outerISize = textRect.ISize(wm); textRect.ISize(wm) = titleWidth; // Align our text within the overall rect by checking our text-align property. const nsStyleText* textStyle = StyleText(); if (textStyle->mTextAlign == StyleTextAlign::Center) { textRect.IStart(wm) += (outerISize - textRect.ISize(wm)) / 2; } else if (textStyle->mTextAlign == StyleTextAlign::End || (textStyle->mTextAlign == StyleTextAlign::Left && wm.IsBidiRTL()) || (textStyle->mTextAlign == StyleTextAlign::Right && wm.IsBidiLTR())) { textRect.IStart(wm) += (outerISize - textRect.ISize(wm)); } mTextDrawRect = textRect.GetPhysicalRect(wm, GetSize()); } /** * Ok return our dimensions */ nsSize nsTextBoxFrame::GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) { CalcTextSize(aBoxLayoutState); nsSize size = mTextSize; DISPLAY_PREF_SIZE(this, size); AddXULBorderAndPadding(size); bool widthSet, heightSet; nsIFrame::AddXULPrefSize(this, size, widthSet, heightSet); return size; } /** * Ok return our dimensions */ nsSize nsTextBoxFrame::GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) { CalcTextSize(aBoxLayoutState); nsSize size = mTextSize; DISPLAY_MIN_SIZE(this, size); // if there is cropping our min width becomes our border and padding if (mCropType != CropNone && mCropType != CropAuto) { if (GetWritingMode().IsVertical()) { size.height = 0; } else { size.width = 0; } } AddXULBorderAndPadding(size); bool widthSet, heightSet; nsIFrame::AddXULMinSize(this, size, widthSet, heightSet); return size; } nscoord nsTextBoxFrame::GetXULBoxAscent(nsBoxLayoutState& aBoxLayoutState) { CalcTextSize(aBoxLayoutState); nscoord ascent = mAscent; nsMargin m(0, 0, 0, 0); GetXULBorderAndPadding(m); WritingMode wm = GetWritingMode(); ascent += LogicalMargin(wm, m).BStart(wm); return ascent; } #ifdef DEBUG_FRAME_DUMP nsresult nsTextBoxFrame::GetFrameName(nsAString& aResult) const { MakeFrameName(u"TextBox"_ns, aResult); aResult += u"[value="_ns + mTitle + u"]"_ns; return NS_OK; } #endif