forked from mirrors/gecko-dev
612325227f
Backed out changeset 815543d81a1d (bug 1526972) Backed out changeset a895c9028b31 (bug 1526972) Backed out changeset 2ea2f8533078 (bug 1526972) Backed out changeset 2fb940b13971 (bug 1526972) Backed out changeset 8543b9d46521 (bug 1526972) Backed out changeset ddd57e437228 (bug 1526972) Backed out changeset 54b14df56e6f (bug 1526972) Backed out changeset a59f06022a95 (bug 1526972)
865 lines
33 KiB
C++
865 lines
33 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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 "TextOverflow.h"
|
|
#include <algorithm>
|
|
|
|
// Please maintain alphabetical order below
|
|
#include "gfxContext.h"
|
|
#include "nsBlockFrame.h"
|
|
#include "nsCaret.h"
|
|
#include "nsContentUtils.h"
|
|
#include "nsCSSAnonBoxes.h"
|
|
#include "nsFontMetrics.h"
|
|
#include "nsGfxScrollFrame.h"
|
|
#include "nsIScrollableFrame.h"
|
|
#include "nsLayoutUtils.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsRect.h"
|
|
#include "nsTextFrame.h"
|
|
#include "nsIFrameInlines.h"
|
|
#include "mozilla/ArrayUtils.h"
|
|
#include "mozilla/Likely.h"
|
|
#include "mozilla/PresShell.h"
|
|
#include "mozilla/dom/Selection.h"
|
|
#include "TextDrawTarget.h"
|
|
|
|
using mozilla::layout::TextDrawTarget;
|
|
|
|
namespace mozilla {
|
|
namespace css {
|
|
|
|
class LazyReferenceRenderingDrawTargetGetterFromFrame final
|
|
: public gfxFontGroup::LazyReferenceDrawTargetGetter {
|
|
public:
|
|
typedef mozilla::gfx::DrawTarget DrawTarget;
|
|
|
|
explicit LazyReferenceRenderingDrawTargetGetterFromFrame(nsIFrame* aFrame)
|
|
: mFrame(aFrame) {}
|
|
virtual already_AddRefed<DrawTarget> GetRefDrawTarget() override {
|
|
RefPtr<gfxContext> ctx =
|
|
mFrame->PresShell()->CreateReferenceRenderingContext();
|
|
RefPtr<DrawTarget> dt = ctx->GetDrawTarget();
|
|
return dt.forget();
|
|
}
|
|
|
|
private:
|
|
nsIFrame* mFrame;
|
|
};
|
|
|
|
static gfxTextRun* GetEllipsisTextRun(nsIFrame* aFrame) {
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(aFrame);
|
|
LazyReferenceRenderingDrawTargetGetterFromFrame lazyRefDrawTargetGetter(
|
|
aFrame);
|
|
return fm->GetThebesFontGroup()->GetEllipsisTextRun(
|
|
aFrame->PresContext()->AppUnitsPerDevPixel(),
|
|
nsLayoutUtils::GetTextRunOrientFlagsForStyle(aFrame->Style()),
|
|
lazyRefDrawTargetGetter);
|
|
}
|
|
|
|
static nsIFrame* GetSelfOrNearestBlock(nsIFrame* aFrame) {
|
|
MOZ_ASSERT(aFrame);
|
|
return aFrame->IsBlockFrameOrSubclass()
|
|
? aFrame
|
|
: nsLayoutUtils::FindNearestBlockAncestor(aFrame);
|
|
}
|
|
|
|
// Return true if the frame is an atomic inline-level element.
|
|
// It's not supposed to be called for block frames since we never
|
|
// process block descendants for text-overflow.
|
|
static bool IsAtomicElement(nsIFrame* aFrame, LayoutFrameType aFrameType) {
|
|
MOZ_ASSERT(!aFrame->IsBlockFrameOrSubclass() || !aFrame->IsBlockOutside(),
|
|
"unexpected block frame");
|
|
MOZ_ASSERT(aFrameType != LayoutFrameType::Placeholder,
|
|
"unexpected placeholder frame");
|
|
return !aFrame->IsFrameOfType(nsIFrame::eLineParticipant);
|
|
}
|
|
|
|
static bool IsFullyClipped(nsTextFrame* aFrame, nscoord aLeft, nscoord aRight,
|
|
nscoord* aSnappedLeft, nscoord* aSnappedRight) {
|
|
*aSnappedLeft = aLeft;
|
|
*aSnappedRight = aRight;
|
|
if (aLeft <= 0 && aRight <= 0) {
|
|
return false;
|
|
}
|
|
return !aFrame->MeasureCharClippedText(aLeft, aRight, aSnappedLeft,
|
|
aSnappedRight);
|
|
}
|
|
|
|
static bool IsInlineAxisOverflowVisible(nsIFrame* aFrame) {
|
|
MOZ_ASSERT(aFrame && aFrame->IsBlockFrameOrSubclass(),
|
|
"expected a block frame");
|
|
|
|
nsIFrame* f = aFrame;
|
|
while (f && f->Style()->IsAnonBox() && !f->IsScrollFrame()) {
|
|
f = f->GetParent();
|
|
}
|
|
if (!f) {
|
|
return true;
|
|
}
|
|
auto overflow = aFrame->GetWritingMode().IsVertical()
|
|
? f->StyleDisplay()->mOverflowY
|
|
: f->StyleDisplay()->mOverflowX;
|
|
return overflow == StyleOverflow::Visible;
|
|
}
|
|
|
|
static void ClipMarker(const nsRect& aContentArea, const nsRect& aMarkerRect,
|
|
DisplayListClipState::AutoSaveRestore& aClipState) {
|
|
nscoord rightOverflow = aMarkerRect.XMost() - aContentArea.XMost();
|
|
nsRect markerRect = aMarkerRect;
|
|
if (rightOverflow > 0) {
|
|
// Marker overflows on the right side (content width < marker width).
|
|
markerRect.width -= rightOverflow;
|
|
aClipState.ClipContentDescendants(markerRect);
|
|
} else {
|
|
nscoord leftOverflow = aContentArea.x - aMarkerRect.x;
|
|
if (leftOverflow > 0) {
|
|
// Marker overflows on the left side
|
|
markerRect.width -= leftOverflow;
|
|
markerRect.x += leftOverflow;
|
|
aClipState.ClipContentDescendants(markerRect);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void InflateIStart(WritingMode aWM, LogicalRect* aRect, nscoord aDelta) {
|
|
nscoord iend = aRect->IEnd(aWM);
|
|
aRect->IStart(aWM) -= aDelta;
|
|
aRect->ISize(aWM) = std::max(iend - aRect->IStart(aWM), 0);
|
|
}
|
|
|
|
static void InflateIEnd(WritingMode aWM, LogicalRect* aRect, nscoord aDelta) {
|
|
aRect->ISize(aWM) = std::max(aRect->ISize(aWM) + aDelta, 0);
|
|
}
|
|
|
|
static bool IsFrameDescendantOfAny(
|
|
nsIFrame* aChild, const TextOverflow::FrameHashtable& aSetOfFrames,
|
|
nsIFrame* aCommonAncestor) {
|
|
for (nsIFrame* f = aChild; f && f != aCommonAncestor;
|
|
f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
|
if (aSetOfFrames.GetEntry(f)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
class nsDisplayTextOverflowMarker final : public nsDisplayItem {
|
|
public:
|
|
nsDisplayTextOverflowMarker(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
|
|
const nsRect& aRect, nscoord aAscent,
|
|
const nsStyleTextOverflowSide* aStyle,
|
|
uint32_t aLineNumber, uint32_t aIndex)
|
|
: nsDisplayItem(aBuilder, aFrame),
|
|
mRect(aRect),
|
|
mStyle(*aStyle),
|
|
mAscent(aAscent),
|
|
mIndex((aLineNumber << 1) + aIndex) {
|
|
MOZ_COUNT_CTOR(nsDisplayTextOverflowMarker);
|
|
}
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
virtual ~nsDisplayTextOverflowMarker() {
|
|
MOZ_COUNT_DTOR(nsDisplayTextOverflowMarker);
|
|
}
|
|
#endif
|
|
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
|
|
bool* aSnap) const override {
|
|
*aSnap = false;
|
|
nsRect shadowRect = nsLayoutUtils::GetTextShadowRectsUnion(mRect, mFrame);
|
|
return mRect.Union(shadowRect);
|
|
}
|
|
|
|
virtual nsRect GetComponentAlphaBounds(
|
|
nsDisplayListBuilder* aBuilder) const override {
|
|
if (gfxPlatform::GetPlatform()->RespectsFontStyleSmoothing()) {
|
|
// On OS X, web authors can turn off subpixel text rendering using the
|
|
// CSS property -moz-osx-font-smoothing. If they do that, we don't need
|
|
// to use component alpha layers for the affected text.
|
|
if (mFrame->StyleFont()->mFont.smoothing == NS_FONT_SMOOTHING_GRAYSCALE) {
|
|
return nsRect();
|
|
}
|
|
}
|
|
bool snap;
|
|
return GetBounds(aBuilder, &snap);
|
|
}
|
|
|
|
virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
|
|
|
|
virtual uint32_t GetPerFrameKey() const override {
|
|
return (mIndex << TYPE_BITS) | nsDisplayItem::GetPerFrameKey();
|
|
}
|
|
void PaintTextToContext(gfxContext* aCtx, nsPoint aOffsetFromRect);
|
|
|
|
virtual bool CreateWebRenderCommands(
|
|
mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const StackingContextHelper& aSc,
|
|
layers::RenderRootStateManager* aManager,
|
|
nsDisplayListBuilder* aDisplayListBuilder) override;
|
|
|
|
NS_DISPLAY_DECL_NAME("TextOverflow", TYPE_TEXT_OVERFLOW)
|
|
private:
|
|
nsRect mRect; // in reference frame coordinates
|
|
const nsStyleTextOverflowSide mStyle;
|
|
nscoord mAscent; // baseline for the marker text in mRect
|
|
uint32_t mIndex;
|
|
};
|
|
|
|
static void PaintTextShadowCallback(gfxContext* aCtx, nsPoint aShadowOffset,
|
|
const nscolor& aShadowColor, void* aData) {
|
|
reinterpret_cast<nsDisplayTextOverflowMarker*>(aData)->PaintTextToContext(
|
|
aCtx, aShadowOffset);
|
|
}
|
|
|
|
void nsDisplayTextOverflowMarker::Paint(nsDisplayListBuilder* aBuilder,
|
|
gfxContext* aCtx) {
|
|
DrawTargetAutoDisableSubpixelAntialiasing disable(aCtx->GetDrawTarget(),
|
|
mDisableSubpixelAA);
|
|
|
|
nscolor foregroundColor =
|
|
nsLayoutUtils::GetColor(mFrame, &nsStyleText::mWebkitTextFillColor);
|
|
|
|
// Paint the text-shadows for the overflow marker
|
|
nsLayoutUtils::PaintTextShadow(mFrame, aCtx, mRect, GetPaintRect(),
|
|
foregroundColor, PaintTextShadowCallback,
|
|
(void*)this);
|
|
aCtx->SetColor(gfx::Color::FromABGR(foregroundColor));
|
|
PaintTextToContext(aCtx, nsPoint(0, 0));
|
|
}
|
|
|
|
void nsDisplayTextOverflowMarker::PaintTextToContext(gfxContext* aCtx,
|
|
nsPoint aOffsetFromRect) {
|
|
WritingMode wm = mFrame->GetWritingMode();
|
|
nsPoint pt(mRect.x, mRect.y);
|
|
if (wm.IsVertical()) {
|
|
if (wm.IsVerticalLR()) {
|
|
pt.x = NSToCoordFloor(
|
|
nsLayoutUtils::GetSnappedBaselineX(mFrame, aCtx, pt.x, mAscent));
|
|
} else {
|
|
pt.x = NSToCoordFloor(nsLayoutUtils::GetSnappedBaselineX(
|
|
mFrame, aCtx, pt.x + mRect.width, -mAscent));
|
|
}
|
|
} else {
|
|
pt.y = NSToCoordFloor(
|
|
nsLayoutUtils::GetSnappedBaselineY(mFrame, aCtx, pt.y, mAscent));
|
|
}
|
|
pt += aOffsetFromRect;
|
|
|
|
if (mStyle.mType == NS_STYLE_TEXT_OVERFLOW_ELLIPSIS) {
|
|
gfxTextRun* textRun = GetEllipsisTextRun(mFrame);
|
|
if (textRun) {
|
|
NS_ASSERTION(!textRun->IsRightToLeft(),
|
|
"Ellipsis textruns should always be LTR!");
|
|
gfx::Point gfxPt(pt.x, pt.y);
|
|
textRun->Draw(gfxTextRun::Range(textRun), gfxPt,
|
|
gfxTextRun::DrawParams(aCtx));
|
|
}
|
|
} else {
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(mFrame);
|
|
nsLayoutUtils::DrawString(mFrame, *fm, aCtx, mStyle.mString.get(),
|
|
mStyle.mString.Length(), pt);
|
|
}
|
|
}
|
|
|
|
bool nsDisplayTextOverflowMarker::CreateWebRenderCommands(
|
|
mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const StackingContextHelper& aSc, layers::RenderRootStateManager* aManager,
|
|
nsDisplayListBuilder* aDisplayListBuilder) {
|
|
bool snap;
|
|
nsRect bounds = GetBounds(aDisplayListBuilder, &snap);
|
|
if (bounds.IsEmpty()) {
|
|
return true;
|
|
}
|
|
|
|
// Run the rendering algorithm to capture the glyphs and shadows
|
|
RefPtr<TextDrawTarget> textDrawer =
|
|
new TextDrawTarget(aBuilder, aResources, aSc, aManager, this, bounds);
|
|
RefPtr<gfxContext> captureCtx = gfxContext::CreateOrNull(textDrawer);
|
|
Paint(aDisplayListBuilder, captureCtx);
|
|
textDrawer->TerminateShadows();
|
|
|
|
return textDrawer->Finish();
|
|
}
|
|
|
|
TextOverflow::TextOverflow(nsDisplayListBuilder* aBuilder,
|
|
nsIFrame* aBlockFrame)
|
|
: mContentArea(aBlockFrame->GetWritingMode(),
|
|
aBlockFrame->GetContentRectRelativeToSelf(),
|
|
aBlockFrame->GetSize()),
|
|
mBuilder(aBuilder),
|
|
mBlock(aBlockFrame),
|
|
mScrollableFrame(nsLayoutUtils::GetScrollableFrameFor(aBlockFrame)),
|
|
mBlockSize(aBlockFrame->GetSize()),
|
|
mBlockWM(aBlockFrame->GetWritingMode()),
|
|
mAdjustForPixelSnapping(false) {
|
|
#ifdef MOZ_XUL
|
|
if (!mScrollableFrame) {
|
|
auto pseudoType = aBlockFrame->Style()->GetPseudoType();
|
|
if (pseudoType == PseudoStyleType::mozXULAnonymousBlock) {
|
|
mScrollableFrame =
|
|
nsLayoutUtils::GetScrollableFrameFor(aBlockFrame->GetParent());
|
|
// nsXULScrollFrame::ClampAndSetBounds rounds to nearest pixels
|
|
// for RTL blocks (also for overflow:hidden), so we need to move
|
|
// the edges 1px outward in ExamineLineFrames to avoid triggering
|
|
// a text-overflow marker in this case.
|
|
mAdjustForPixelSnapping = !mBlockWM.IsBidiLTR();
|
|
}
|
|
}
|
|
#endif
|
|
mCanHaveInlineAxisScrollbar = false;
|
|
if (mScrollableFrame) {
|
|
auto scrollbarStyle = mBlockWM.IsVertical()
|
|
? mScrollableFrame->GetScrollStyles().mVertical
|
|
: mScrollableFrame->GetScrollStyles().mHorizontal;
|
|
mCanHaveInlineAxisScrollbar = scrollbarStyle != StyleOverflow::Hidden;
|
|
if (!mAdjustForPixelSnapping) {
|
|
// Scrolling to the end position can leave some text still overflowing due
|
|
// to pixel snapping behaviour in our scrolling code.
|
|
mAdjustForPixelSnapping = mCanHaveInlineAxisScrollbar;
|
|
}
|
|
// Use a null containerSize to convert a vector from logical to physical.
|
|
const nsSize nullContainerSize;
|
|
mContentArea.MoveBy(
|
|
mBlockWM, LogicalPoint(mBlockWM, mScrollableFrame->GetScrollPosition(),
|
|
nullContainerSize));
|
|
}
|
|
uint8_t direction = aBlockFrame->StyleVisibility()->mDirection;
|
|
const nsStyleTextReset* style = aBlockFrame->StyleTextReset();
|
|
if (mBlockWM.IsBidiLTR()) {
|
|
mIStart.Init(style->mTextOverflow.GetLeft(direction));
|
|
mIEnd.Init(style->mTextOverflow.GetRight(direction));
|
|
} else {
|
|
mIStart.Init(style->mTextOverflow.GetRight(direction));
|
|
mIEnd.Init(style->mTextOverflow.GetLeft(direction));
|
|
}
|
|
// The left/right marker string is setup in ExamineLineFrames when a line
|
|
// has overflow on that side.
|
|
}
|
|
|
|
/* static */
|
|
Maybe<TextOverflow> TextOverflow::WillProcessLines(
|
|
nsDisplayListBuilder* aBuilder, nsIFrame* aBlockFrame) {
|
|
// Ignore 'text-overflow' for event and frame visibility processing.
|
|
if (aBuilder->IsForEventDelivery() || aBuilder->IsForFrameVisibility() ||
|
|
!CanHaveTextOverflow(aBlockFrame)) {
|
|
return Nothing();
|
|
}
|
|
nsIScrollableFrame* scrollableFrame =
|
|
nsLayoutUtils::GetScrollableFrameFor(aBlockFrame);
|
|
if (scrollableFrame && scrollableFrame->IsTransformingByAPZ()) {
|
|
// If the APZ is actively scrolling this, don't bother with markers.
|
|
return Nothing();
|
|
}
|
|
return Some(TextOverflow(aBuilder, aBlockFrame));
|
|
}
|
|
|
|
void TextOverflow::ExamineFrameSubtree(nsIFrame* aFrame,
|
|
const LogicalRect& aContentArea,
|
|
const LogicalRect& aInsideMarkersArea,
|
|
FrameHashtable* aFramesToHide,
|
|
AlignmentEdges* aAlignmentEdges,
|
|
bool* aFoundVisibleTextOrAtomic,
|
|
InnerClipEdges* aClippedMarkerEdges) {
|
|
const LayoutFrameType frameType = aFrame->Type();
|
|
if (frameType == LayoutFrameType::Br ||
|
|
frameType == LayoutFrameType::Placeholder) {
|
|
return;
|
|
}
|
|
const bool isAtomic = IsAtomicElement(aFrame, frameType);
|
|
if (aFrame->StyleVisibility()->IsVisible()) {
|
|
LogicalRect childRect =
|
|
GetLogicalScrollableOverflowRectRelativeToBlock(aFrame);
|
|
bool overflowIStart =
|
|
childRect.IStart(mBlockWM) < aContentArea.IStart(mBlockWM);
|
|
bool overflowIEnd = childRect.IEnd(mBlockWM) > aContentArea.IEnd(mBlockWM);
|
|
if (overflowIStart) {
|
|
mIStart.mHasOverflow = true;
|
|
}
|
|
if (overflowIEnd) {
|
|
mIEnd.mHasOverflow = true;
|
|
}
|
|
if (isAtomic && ((mIStart.mActive && overflowIStart) ||
|
|
(mIEnd.mActive && overflowIEnd))) {
|
|
aFramesToHide->PutEntry(aFrame);
|
|
} else if (isAtomic || frameType == LayoutFrameType::Text) {
|
|
AnalyzeMarkerEdges(aFrame, frameType, aInsideMarkersArea, aFramesToHide,
|
|
aAlignmentEdges, aFoundVisibleTextOrAtomic,
|
|
aClippedMarkerEdges);
|
|
}
|
|
}
|
|
if (isAtomic) {
|
|
return;
|
|
}
|
|
|
|
for (nsIFrame* child : aFrame->PrincipalChildList()) {
|
|
ExamineFrameSubtree(child, aContentArea, aInsideMarkersArea, aFramesToHide,
|
|
aAlignmentEdges, aFoundVisibleTextOrAtomic,
|
|
aClippedMarkerEdges);
|
|
}
|
|
}
|
|
|
|
void TextOverflow::AnalyzeMarkerEdges(nsIFrame* aFrame,
|
|
LayoutFrameType aFrameType,
|
|
const LogicalRect& aInsideMarkersArea,
|
|
FrameHashtable* aFramesToHide,
|
|
AlignmentEdges* aAlignmentEdges,
|
|
bool* aFoundVisibleTextOrAtomic,
|
|
InnerClipEdges* aClippedMarkerEdges) {
|
|
MOZ_ASSERT(aFrameType == LayoutFrameType::Text ||
|
|
IsAtomicElement(aFrame, aFrameType));
|
|
LogicalRect borderRect(mBlockWM,
|
|
nsRect(aFrame->GetOffsetTo(mBlock), aFrame->GetSize()),
|
|
mBlockSize);
|
|
nscoord istartOverlap = std::max(
|
|
aInsideMarkersArea.IStart(mBlockWM) - borderRect.IStart(mBlockWM), 0);
|
|
nscoord iendOverlap = std::max(
|
|
borderRect.IEnd(mBlockWM) - aInsideMarkersArea.IEnd(mBlockWM), 0);
|
|
bool insideIStartEdge =
|
|
aInsideMarkersArea.IStart(mBlockWM) <= borderRect.IEnd(mBlockWM);
|
|
bool insideIEndEdge =
|
|
borderRect.IStart(mBlockWM) <= aInsideMarkersArea.IEnd(mBlockWM);
|
|
|
|
if (istartOverlap > 0) {
|
|
aClippedMarkerEdges->AccumulateIStart(mBlockWM, borderRect);
|
|
if (!mIStart.mActive) {
|
|
istartOverlap = 0;
|
|
}
|
|
}
|
|
if (iendOverlap > 0) {
|
|
aClippedMarkerEdges->AccumulateIEnd(mBlockWM, borderRect);
|
|
if (!mIEnd.mActive) {
|
|
iendOverlap = 0;
|
|
}
|
|
}
|
|
|
|
if ((istartOverlap > 0 && insideIStartEdge) ||
|
|
(iendOverlap > 0 && insideIEndEdge)) {
|
|
if (aFrameType == LayoutFrameType::Text) {
|
|
auto textFrame = static_cast<nsTextFrame*>(aFrame);
|
|
if ((aInsideMarkersArea.IStart(mBlockWM) <
|
|
aInsideMarkersArea.IEnd(mBlockWM)) &&
|
|
textFrame->HasNonSuppressedText()) {
|
|
// a clipped text frame and there is some room between the markers
|
|
nscoord snappedIStart, snappedIEnd;
|
|
bool isFullyClipped =
|
|
mBlockWM.IsBidiLTR()
|
|
? IsFullyClipped(textFrame, istartOverlap, iendOverlap,
|
|
&snappedIStart, &snappedIEnd)
|
|
: IsFullyClipped(textFrame, iendOverlap, istartOverlap,
|
|
&snappedIEnd, &snappedIStart);
|
|
if (!isFullyClipped) {
|
|
LogicalRect snappedRect = borderRect;
|
|
if (istartOverlap > 0) {
|
|
snappedRect.IStart(mBlockWM) += snappedIStart;
|
|
snappedRect.ISize(mBlockWM) -= snappedIStart;
|
|
}
|
|
if (iendOverlap > 0) {
|
|
snappedRect.ISize(mBlockWM) -= snappedIEnd;
|
|
}
|
|
aAlignmentEdges->Accumulate(mBlockWM, snappedRect);
|
|
*aFoundVisibleTextOrAtomic = true;
|
|
}
|
|
}
|
|
} else {
|
|
aFramesToHide->PutEntry(aFrame);
|
|
}
|
|
} else if (!insideIStartEdge || !insideIEndEdge) {
|
|
// frame is outside
|
|
if (IsAtomicElement(aFrame, aFrameType)) {
|
|
aFramesToHide->PutEntry(aFrame);
|
|
}
|
|
} else {
|
|
// frame is inside
|
|
aAlignmentEdges->Accumulate(mBlockWM, borderRect);
|
|
if (aFrameType == LayoutFrameType::Text) {
|
|
auto textFrame = static_cast<nsTextFrame*>(aFrame);
|
|
if (textFrame->HasNonSuppressedText()) {
|
|
*aFoundVisibleTextOrAtomic = true;
|
|
}
|
|
} else {
|
|
*aFoundVisibleTextOrAtomic = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
LogicalRect TextOverflow::ExamineLineFrames(nsLineBox* aLine,
|
|
FrameHashtable* aFramesToHide,
|
|
AlignmentEdges* aAlignmentEdges) {
|
|
// No ellipsing for 'clip' style.
|
|
bool suppressIStart = mIStart.mStyle->mType == NS_STYLE_TEXT_OVERFLOW_CLIP;
|
|
bool suppressIEnd = mIEnd.mStyle->mType == NS_STYLE_TEXT_OVERFLOW_CLIP;
|
|
if (mCanHaveInlineAxisScrollbar) {
|
|
LogicalPoint pos(mBlockWM, mScrollableFrame->GetScrollPosition(),
|
|
mBlockSize);
|
|
LogicalRect scrollRange(mBlockWM, mScrollableFrame->GetScrollRange(),
|
|
mBlockSize);
|
|
// No ellipsing when nothing to scroll to on that side (this includes
|
|
// overflow:auto that doesn't trigger a horizontal scrollbar).
|
|
if (pos.I(mBlockWM) <= scrollRange.IStart(mBlockWM)) {
|
|
suppressIStart = true;
|
|
}
|
|
if (pos.I(mBlockWM) >= scrollRange.IEnd(mBlockWM)) {
|
|
suppressIEnd = true;
|
|
}
|
|
}
|
|
|
|
LogicalRect contentArea = mContentArea;
|
|
bool snapStart = true, snapEnd = true;
|
|
nscoord startEdge, endEdge;
|
|
if (aLine->GetFloatEdges(&startEdge, &endEdge)) {
|
|
// Narrow the |contentArea| to account for any floats on this line, and
|
|
// don't bother with the snapping quirk on whichever side(s) we narrow.
|
|
nscoord delta = endEdge - contentArea.IEnd(mBlockWM);
|
|
if (delta < 0) {
|
|
nscoord newSize = contentArea.ISize(mBlockWM) + delta;
|
|
contentArea.ISize(mBlockWM) = std::max(nscoord(0), newSize);
|
|
snapEnd = false;
|
|
}
|
|
delta = startEdge - contentArea.IStart(mBlockWM);
|
|
if (delta > 0) {
|
|
contentArea.IStart(mBlockWM) = startEdge;
|
|
nscoord newSize = contentArea.ISize(mBlockWM) - delta;
|
|
contentArea.ISize(mBlockWM) = std::max(nscoord(0), newSize);
|
|
snapStart = false;
|
|
}
|
|
}
|
|
// Save the non-snapped area since that's what we want to use when placing
|
|
// the markers (our return value). The snapped area is only for analysis.
|
|
LogicalRect nonSnappedContentArea = contentArea;
|
|
if (mAdjustForPixelSnapping) {
|
|
const nscoord scrollAdjust = mBlock->PresContext()->AppUnitsPerDevPixel();
|
|
if (snapStart) {
|
|
InflateIStart(mBlockWM, &contentArea, scrollAdjust);
|
|
}
|
|
if (snapEnd) {
|
|
InflateIEnd(mBlockWM, &contentArea, scrollAdjust);
|
|
}
|
|
}
|
|
|
|
LogicalRect lineRect(mBlockWM, aLine->GetScrollableOverflowArea(),
|
|
mBlockSize);
|
|
const bool istartOverflow =
|
|
!suppressIStart &&
|
|
lineRect.IStart(mBlockWM) < contentArea.IStart(mBlockWM);
|
|
const bool iendOverflow =
|
|
!suppressIEnd && lineRect.IEnd(mBlockWM) > contentArea.IEnd(mBlockWM);
|
|
if (!istartOverflow && !iendOverflow) {
|
|
// The line does not overflow on a side we should ellipsize.
|
|
return nonSnappedContentArea;
|
|
}
|
|
|
|
int pass = 0;
|
|
bool retryEmptyLine = true;
|
|
bool guessIStart = istartOverflow;
|
|
bool guessIEnd = iendOverflow;
|
|
mIStart.mActive = istartOverflow;
|
|
mIEnd.mActive = iendOverflow;
|
|
bool clippedIStartMarker = false;
|
|
bool clippedIEndMarker = false;
|
|
do {
|
|
// Setup marker strings as needed.
|
|
if (guessIStart) {
|
|
mIStart.SetupString(mBlock);
|
|
}
|
|
if (guessIEnd) {
|
|
mIEnd.SetupString(mBlock);
|
|
}
|
|
|
|
// If there is insufficient space for both markers then keep the one on the
|
|
// end side per the block's 'direction'.
|
|
nscoord istartMarkerISize = mIStart.mActive ? mIStart.mISize : 0;
|
|
nscoord iendMarkerISize = mIEnd.mActive ? mIEnd.mISize : 0;
|
|
if (istartMarkerISize && iendMarkerISize &&
|
|
istartMarkerISize + iendMarkerISize > contentArea.ISize(mBlockWM)) {
|
|
istartMarkerISize = 0;
|
|
}
|
|
|
|
// Calculate the area between the potential markers aligned at the
|
|
// block's edge.
|
|
LogicalRect insideMarkersArea = nonSnappedContentArea;
|
|
if (guessIStart) {
|
|
InflateIStart(mBlockWM, &insideMarkersArea, -istartMarkerISize);
|
|
}
|
|
if (guessIEnd) {
|
|
InflateIEnd(mBlockWM, &insideMarkersArea, -iendMarkerISize);
|
|
}
|
|
|
|
// Analyze the frames on aLine for the overflow situation at the content
|
|
// edges and at the edges of the area between the markers.
|
|
bool foundVisibleTextOrAtomic = false;
|
|
int32_t n = aLine->GetChildCount();
|
|
nsIFrame* child = aLine->mFirstChild;
|
|
InnerClipEdges clippedMarkerEdges;
|
|
for (; n-- > 0; child = child->GetNextSibling()) {
|
|
ExamineFrameSubtree(child, contentArea, insideMarkersArea, aFramesToHide,
|
|
aAlignmentEdges, &foundVisibleTextOrAtomic,
|
|
&clippedMarkerEdges);
|
|
}
|
|
if (!foundVisibleTextOrAtomic && retryEmptyLine) {
|
|
aAlignmentEdges->mAssigned = false;
|
|
aFramesToHide->Clear();
|
|
pass = -1;
|
|
if (mIStart.IsNeeded() && mIStart.mActive && !clippedIStartMarker) {
|
|
if (clippedMarkerEdges.mAssignedIStart &&
|
|
clippedMarkerEdges.mIStart >
|
|
nonSnappedContentArea.IStart(mBlockWM)) {
|
|
mIStart.mISize = clippedMarkerEdges.mIStart -
|
|
nonSnappedContentArea.IStart(mBlockWM);
|
|
NS_ASSERTION(mIStart.mISize < mIStart.mIntrinsicISize,
|
|
"clipping a marker should make it strictly smaller");
|
|
clippedIStartMarker = true;
|
|
} else {
|
|
mIStart.mActive = guessIStart = false;
|
|
}
|
|
continue;
|
|
}
|
|
if (mIEnd.IsNeeded() && mIEnd.mActive && !clippedIEndMarker) {
|
|
if (clippedMarkerEdges.mAssignedIEnd &&
|
|
nonSnappedContentArea.IEnd(mBlockWM) > clippedMarkerEdges.mIEnd) {
|
|
mIEnd.mISize =
|
|
nonSnappedContentArea.IEnd(mBlockWM) - clippedMarkerEdges.mIEnd;
|
|
NS_ASSERTION(mIEnd.mISize < mIEnd.mIntrinsicISize,
|
|
"clipping a marker should make it strictly smaller");
|
|
clippedIEndMarker = true;
|
|
} else {
|
|
mIEnd.mActive = guessIEnd = false;
|
|
}
|
|
continue;
|
|
}
|
|
// The line simply has no visible content even without markers,
|
|
// so examine the line again without suppressing markers.
|
|
retryEmptyLine = false;
|
|
mIStart.mISize = mIStart.mIntrinsicISize;
|
|
mIStart.mActive = guessIStart = istartOverflow;
|
|
mIEnd.mISize = mIEnd.mIntrinsicISize;
|
|
mIEnd.mActive = guessIEnd = iendOverflow;
|
|
continue;
|
|
}
|
|
if (guessIStart == (mIStart.mActive && mIStart.IsNeeded()) &&
|
|
guessIEnd == (mIEnd.mActive && mIEnd.IsNeeded())) {
|
|
break;
|
|
} else {
|
|
guessIStart = mIStart.mActive && mIStart.IsNeeded();
|
|
guessIEnd = mIEnd.mActive && mIEnd.IsNeeded();
|
|
mIStart.Reset();
|
|
mIEnd.Reset();
|
|
aFramesToHide->Clear();
|
|
}
|
|
NS_ASSERTION(pass == 0, "2nd pass should never guess wrong");
|
|
} while (++pass != 2);
|
|
if (!istartOverflow || !mIStart.mActive) {
|
|
mIStart.Reset();
|
|
}
|
|
if (!iendOverflow || !mIEnd.mActive) {
|
|
mIEnd.Reset();
|
|
}
|
|
return nonSnappedContentArea;
|
|
}
|
|
|
|
void TextOverflow::ProcessLine(const nsDisplayListSet& aLists, nsLineBox* aLine,
|
|
uint32_t aLineNumber) {
|
|
NS_ASSERTION(mIStart.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP ||
|
|
mIEnd.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP,
|
|
"TextOverflow with 'clip' for both sides");
|
|
mIStart.Reset();
|
|
mIStart.mActive = mIStart.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP;
|
|
mIEnd.Reset();
|
|
mIEnd.mActive = mIEnd.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP;
|
|
|
|
FrameHashtable framesToHide(64);
|
|
AlignmentEdges alignmentEdges;
|
|
const LogicalRect contentArea =
|
|
ExamineLineFrames(aLine, &framesToHide, &alignmentEdges);
|
|
bool needIStart = mIStart.IsNeeded();
|
|
bool needIEnd = mIEnd.IsNeeded();
|
|
if (!needIStart && !needIEnd) {
|
|
return;
|
|
}
|
|
NS_ASSERTION(
|
|
mIStart.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP || !needIStart,
|
|
"left marker for 'clip'");
|
|
NS_ASSERTION(mIEnd.mStyle->mType != NS_STYLE_TEXT_OVERFLOW_CLIP || !needIEnd,
|
|
"right marker for 'clip'");
|
|
|
|
// If there is insufficient space for both markers then keep the one on the
|
|
// end side per the block's 'direction'.
|
|
if (needIStart && needIEnd &&
|
|
mIStart.mISize + mIEnd.mISize > contentArea.ISize(mBlockWM)) {
|
|
needIStart = false;
|
|
}
|
|
LogicalRect insideMarkersArea = contentArea;
|
|
if (needIStart) {
|
|
InflateIStart(mBlockWM, &insideMarkersArea, -mIStart.mISize);
|
|
}
|
|
if (needIEnd) {
|
|
InflateIEnd(mBlockWM, &insideMarkersArea, -mIEnd.mISize);
|
|
}
|
|
if (!mCanHaveInlineAxisScrollbar && alignmentEdges.mAssigned) {
|
|
LogicalRect alignmentRect(mBlockWM, alignmentEdges.mIStart,
|
|
insideMarkersArea.BStart(mBlockWM),
|
|
alignmentEdges.ISize(), 1);
|
|
insideMarkersArea.IntersectRect(insideMarkersArea, alignmentRect);
|
|
}
|
|
|
|
// Clip and remove display items as needed at the final marker edges.
|
|
nsDisplayList* lists[] = {aLists.Content(), aLists.PositionedDescendants()};
|
|
for (uint32_t i = 0; i < ArrayLength(lists); ++i) {
|
|
PruneDisplayListContents(lists[i], framesToHide, insideMarkersArea);
|
|
}
|
|
CreateMarkers(aLine, needIStart, needIEnd, insideMarkersArea, contentArea,
|
|
aLineNumber);
|
|
}
|
|
|
|
void TextOverflow::PruneDisplayListContents(
|
|
nsDisplayList* aList, const FrameHashtable& aFramesToHide,
|
|
const LogicalRect& aInsideMarkersArea) {
|
|
nsDisplayList saved;
|
|
nsDisplayItem* item;
|
|
while ((item = aList->RemoveBottom())) {
|
|
nsIFrame* itemFrame = item->Frame();
|
|
if (IsFrameDescendantOfAny(itemFrame, aFramesToHide, mBlock)) {
|
|
item->Destroy(mBuilder);
|
|
continue;
|
|
}
|
|
|
|
nsDisplayList* wrapper = item->GetSameCoordinateSystemChildren();
|
|
if (wrapper) {
|
|
if (!itemFrame || GetSelfOrNearestBlock(itemFrame) == mBlock) {
|
|
PruneDisplayListContents(wrapper, aFramesToHide, aInsideMarkersArea);
|
|
}
|
|
}
|
|
|
|
nsDisplayText* textItem =
|
|
itemFrame ? nsDisplayText::CheckCast(item) : nullptr;
|
|
if (textItem && GetSelfOrNearestBlock(itemFrame) == mBlock) {
|
|
LogicalRect rect =
|
|
GetLogicalScrollableOverflowRectRelativeToBlock(itemFrame);
|
|
if (mIStart.IsNeeded()) {
|
|
nscoord istart =
|
|
aInsideMarkersArea.IStart(mBlockWM) - rect.IStart(mBlockWM);
|
|
if (istart > 0) {
|
|
(mBlockWM.IsBidiLTR() ? textItem->VisIStartEdge()
|
|
: textItem->VisIEndEdge()) = istart;
|
|
}
|
|
}
|
|
if (mIEnd.IsNeeded()) {
|
|
nscoord iend = rect.IEnd(mBlockWM) - aInsideMarkersArea.IEnd(mBlockWM);
|
|
if (iend > 0) {
|
|
(mBlockWM.IsBidiLTR() ? textItem->VisIEndEdge()
|
|
: textItem->VisIStartEdge()) = iend;
|
|
}
|
|
}
|
|
}
|
|
|
|
saved.AppendToTop(item);
|
|
}
|
|
aList->AppendToTop(&saved);
|
|
}
|
|
|
|
/* static */
|
|
bool TextOverflow::HasClippedOverflow(nsIFrame* aBlockFrame) {
|
|
const nsStyleTextReset* style = aBlockFrame->StyleTextReset();
|
|
return style->mTextOverflow.mLeft.mType == NS_STYLE_TEXT_OVERFLOW_CLIP &&
|
|
style->mTextOverflow.mRight.mType == NS_STYLE_TEXT_OVERFLOW_CLIP;
|
|
}
|
|
|
|
/* static */
|
|
bool TextOverflow::CanHaveTextOverflow(nsIFrame* aBlockFrame) {
|
|
// Nothing to do for text-overflow:clip or if 'overflow-x/y:visible'.
|
|
if (HasClippedOverflow(aBlockFrame) ||
|
|
IsInlineAxisOverflowVisible(aBlockFrame)) {
|
|
return false;
|
|
}
|
|
|
|
// Skip ComboboxControlFrame because it would clip the drop-down arrow.
|
|
// Its anon block inherits 'text-overflow' and does what is expected.
|
|
if (aBlockFrame->IsComboboxControlFrame()) {
|
|
return false;
|
|
}
|
|
|
|
// Inhibit the markers if a descendant content owns the caret.
|
|
RefPtr<nsCaret> caret = aBlockFrame->PresShell()->GetCaret();
|
|
if (caret && caret->IsVisible()) {
|
|
RefPtr<dom::Selection> domSelection = caret->GetSelection();
|
|
if (domSelection) {
|
|
nsCOMPtr<nsIContent> content =
|
|
nsIContent::FromNodeOrNull(domSelection->GetFocusNode());
|
|
if (content && nsContentUtils::ContentIsDescendantOf(
|
|
content, aBlockFrame->GetContent())) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void TextOverflow::CreateMarkers(const nsLineBox* aLine, bool aCreateIStart,
|
|
bool aCreateIEnd,
|
|
const LogicalRect& aInsideMarkersArea,
|
|
const LogicalRect& aContentArea,
|
|
uint32_t aLineNumber) {
|
|
if (aCreateIStart) {
|
|
DisplayListClipState::AutoSaveRestore clipState(mBuilder);
|
|
|
|
LogicalRect markerLogicalRect(
|
|
mBlockWM, aInsideMarkersArea.IStart(mBlockWM) - mIStart.mIntrinsicISize,
|
|
aLine->BStart(), mIStart.mIntrinsicISize, aLine->BSize());
|
|
nsPoint offset = mBuilder->ToReferenceFrame(mBlock);
|
|
nsRect markerRect =
|
|
markerLogicalRect.GetPhysicalRect(mBlockWM, mBlockSize) + offset;
|
|
ClipMarker(aContentArea.GetPhysicalRect(mBlockWM, mBlockSize) + offset,
|
|
markerRect, clipState);
|
|
mMarkerList.AppendNewToTop<nsDisplayTextOverflowMarker>(
|
|
mBuilder, mBlock, markerRect, aLine->GetLogicalAscent(), mIStart.mStyle,
|
|
aLineNumber, 0);
|
|
}
|
|
|
|
if (aCreateIEnd) {
|
|
DisplayListClipState::AutoSaveRestore clipState(mBuilder);
|
|
|
|
LogicalRect markerLogicalRect(mBlockWM, aInsideMarkersArea.IEnd(mBlockWM),
|
|
aLine->BStart(), mIEnd.mIntrinsicISize,
|
|
aLine->BSize());
|
|
nsPoint offset = mBuilder->ToReferenceFrame(mBlock);
|
|
nsRect markerRect =
|
|
markerLogicalRect.GetPhysicalRect(mBlockWM, mBlockSize) + offset;
|
|
ClipMarker(aContentArea.GetPhysicalRect(mBlockWM, mBlockSize) + offset,
|
|
markerRect, clipState);
|
|
mMarkerList.AppendNewToTop<nsDisplayTextOverflowMarker>(
|
|
mBuilder, mBlock, markerRect, aLine->GetLogicalAscent(), mIEnd.mStyle,
|
|
aLineNumber, 1);
|
|
}
|
|
}
|
|
|
|
void TextOverflow::Marker::SetupString(nsIFrame* aFrame) {
|
|
if (mInitialized) {
|
|
return;
|
|
}
|
|
|
|
if (mStyle->mType == NS_STYLE_TEXT_OVERFLOW_ELLIPSIS) {
|
|
gfxTextRun* textRun = GetEllipsisTextRun(aFrame);
|
|
if (textRun) {
|
|
mISize = textRun->GetAdvanceWidth();
|
|
} else {
|
|
mISize = 0;
|
|
}
|
|
} else {
|
|
RefPtr<gfxContext> rc =
|
|
aFrame->PresShell()->CreateReferenceRenderingContext();
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(aFrame);
|
|
mISize = nsLayoutUtils::AppUnitWidthOfStringBidi(mStyle->mString, aFrame,
|
|
*fm, *rc);
|
|
}
|
|
mIntrinsicISize = mISize;
|
|
mInitialized = true;
|
|
}
|
|
|
|
} // namespace css
|
|
} // namespace mozilla
|