| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/paint/InlineTextBoxPainter.h" |
| |
| #include "core/editing/CompositionUnderline.h" |
| #include "core/editing/Editor.h" |
| #include "core/editing/markers/DocumentMarkerController.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/layout/LayoutTextCombine.h" |
| #include "core/layout/LayoutTheme.h" |
| #include "core/layout/api/LineLayoutAPIShim.h" |
| #include "core/layout/api/LineLayoutBox.h" |
| #include "core/layout/line/InlineTextBox.h" |
| #include "core/paint/PaintInfo.h" |
| #include "core/paint/TextPainter.h" |
| #include "core/style/AppliedTextDecoration.h" |
| #include "platform/graphics/GraphicsContextStateSaver.h" |
| #include "platform/graphics/paint/DrawingRecorder.h" |
| #include "wtf/Optional.h" |
| |
| namespace blink { |
| |
| static int computeUnderlineOffset(const TextUnderlinePosition underlinePosition, |
| const FontMetrics& fontMetrics, |
| const InlineTextBox* inlineTextBox, |
| const float textDecorationThickness) { |
| // Compute the gap between the font and the underline. Use at least one |
| // pixel gap, if underline is thick then use a bigger gap. |
| int gap = 0; |
| |
| // Underline position of zero means draw underline on Baseline Position, |
| // in Blink we need at least 1-pixel gap to adding following check. |
| // Positive underline Position means underline should be drawn above baselin e |
| // and negative value means drawing below baseline, negating the value as in |
| // Blink |
| // downward Y-increases. |
| |
| if (fontMetrics.underlinePosition()) |
| gap = -fontMetrics.underlinePosition(); |
| else |
| gap = std::max<int>(1, ceilf(textDecorationThickness / 2.f)); |
| |
| // FIXME: We support only horizontal text for now. |
| switch (underlinePosition) { |
| case TextUnderlinePositionAuto: |
| return fontMetrics.ascent() + |
| gap; // Position underline near the alphabetic baseline. |
| case TextUnderlinePositionUnder: { |
| // Position underline relative to the under edge of the lowest element's |
| // content box. |
| const LayoutUnit offset = |
| inlineTextBox->root().maxLogicalTop() - inlineTextBox->logicalTop(); |
| if (offset > 0) |
| return (inlineTextBox->logicalHeight() + gap + offset).toInt(); |
| return (inlineTextBox->logicalHeight() + gap).toInt(); |
| } |
| } |
| |
| NOTREACHED(); |
| return fontMetrics.ascent() + gap; |
| } |
| |
| static bool shouldSetDecorationAntialias( |
| const Vector<AppliedTextDecoration>& decorations) { |
| for (const AppliedTextDecoration& decoration : decorations) { |
| TextDecorationStyle decorationStyle = decoration.style(); |
| if (decorationStyle == TextDecorationStyleDotted || |
| decorationStyle == TextDecorationStyleDashed) |
| return true; |
| } |
| return false; |
| } |
| |
| static StrokeStyle textDecorationStyleToStrokeStyle( |
| TextDecorationStyle decorationStyle) { |
| StrokeStyle strokeStyle = SolidStroke; |
| switch (decorationStyle) { |
| case TextDecorationStyleSolid: |
| strokeStyle = SolidStroke; |
| break; |
| case TextDecorationStyleDouble: |
| strokeStyle = DoubleStroke; |
| break; |
| case TextDecorationStyleDotted: |
| strokeStyle = DottedStroke; |
| break; |
| case TextDecorationStyleDashed: |
| strokeStyle = DashedStroke; |
| break; |
| case TextDecorationStyleWavy: |
| strokeStyle = WavyStroke; |
| break; |
| } |
| |
| return strokeStyle; |
| } |
| |
| static void adjustStepToDecorationLength(float& step, |
| float& controlPointDistance, |
| float length) { |
| DCHECK_GT(step, 0); |
| |
| if (length <= 0) |
| return; |
| |
| unsigned stepCount = static_cast<unsigned>(length / step); |
| |
| // Each Bezier curve starts at the same pixel that the previous one |
| // ended. We need to subtract (stepCount - 1) pixels when calculating the |
| // length covered to account for that. |
| float uncoveredLength = length - (stepCount * step - (stepCount - 1)); |
| float adjustment = uncoveredLength / stepCount; |
| step += adjustment; |
| controlPointDistance += adjustment; |
| } |
| |
| class AppliedDecorationPainter final { |
| STACK_ALLOCATED(); |
| |
| public: |
| AppliedDecorationPainter(GraphicsContext& context, |
| FloatPoint startPoint, |
| float width, |
| const AppliedTextDecoration& decoration, |
| float thickness, |
| float doubleOffset, |
| int wavyOffsetFactor, |
| bool antialiasDecoration) |
| : m_context(context), |
| m_startPoint(startPoint), |
| m_width(width), |
| m_decoration(decoration), |
| m_thickness(thickness), |
| m_doubleOffset(doubleOffset), |
| m_wavyOffsetFactor(wavyOffsetFactor), |
| m_shouldAntialias(antialiasDecoration){}; |
| |
| void paint(); |
| FloatRect decorationBounds(); |
| |
| private: |
| void strokeWavyTextDecoration(); |
| |
| Path prepareWavyStrokePath(); |
| Path prepareDottedDashedStrokePath(); |
| |
| GraphicsContext& m_context; |
| FloatPoint m_startPoint; |
| float m_width; |
| const AppliedTextDecoration& m_decoration; |
| float m_thickness; |
| const float m_doubleOffset; |
| const int m_wavyOffsetFactor; |
| bool m_shouldAntialias; |
| }; |
| |
| Path AppliedDecorationPainter::prepareDottedDashedStrokePath() { |
| // These coordinate transforms need to match what's happening in |
| // GraphicsContext's drawLineForText and drawLine. |
| int y = floorf(m_startPoint.y() + std::max<float>(m_thickness / 2.0f, 0.5f)); |
| Path strokePath; |
| FloatPoint roundedStartPoint(m_startPoint.x(), y); |
| FloatPoint roundedEndPoint(roundedStartPoint + FloatPoint(m_width, 0)); |
| m_context.adjustLineToPixelBoundaries(roundedStartPoint, roundedEndPoint, |
| roundf(m_thickness), |
| m_context.getStrokeStyle()); |
| strokePath.moveTo(roundedStartPoint); |
| strokePath.addLineTo(roundedEndPoint); |
| return strokePath; |
| } |
| |
| FloatRect AppliedDecorationPainter::decorationBounds() { |
| StrokeData strokeData; |
| strokeData.setThickness(m_thickness); |
| |
| switch (m_decoration.style()) { |
| case TextDecorationStyleDotted: |
| case TextDecorationStyleDashed: { |
| strokeData.setStyle( |
| textDecorationStyleToStrokeStyle(m_decoration.style())); |
| return prepareDottedDashedStrokePath().strokeBoundingRect( |
| strokeData, Path::BoundsType::Exact); |
| } |
| case TextDecorationStyleWavy: |
| return prepareWavyStrokePath().strokeBoundingRect( |
| strokeData, Path::BoundsType::Exact); |
| break; |
| case TextDecorationStyleDouble: |
| if (m_doubleOffset > 0) { |
| return FloatRect(m_startPoint.x(), m_startPoint.y(), m_width, |
| m_doubleOffset + m_thickness); |
| } |
| return FloatRect(m_startPoint.x(), m_startPoint.y() + m_doubleOffset, |
| m_width, -m_doubleOffset + m_thickness); |
| break; |
| case TextDecorationStyleSolid: |
| return FloatRect(m_startPoint.x(), m_startPoint.y(), m_width, |
| m_thickness); |
| default: |
| break; |
| } |
| NOTREACHED(); |
| return FloatRect(); |
| } |
| |
| void AppliedDecorationPainter::paint() { |
| m_context.setStrokeStyle( |
| textDecorationStyleToStrokeStyle(m_decoration.style())); |
| m_context.setStrokeColor(m_decoration.color()); |
| |
| switch (m_decoration.style()) { |
| case TextDecorationStyleWavy: |
| strokeWavyTextDecoration(); |
| break; |
| case TextDecorationStyleDotted: |
| case TextDecorationStyleDashed: |
| m_context.setShouldAntialias(m_shouldAntialias); |
| // Fall through |
| default: |
| m_context.drawLineForText(m_startPoint, m_width); |
| |
| if (m_decoration.style() == TextDecorationStyleDouble) { |
| m_context.drawLineForText(m_startPoint + FloatPoint(0, m_doubleOffset), |
| m_width); |
| } |
| } |
| } |
| |
| void AppliedDecorationPainter::strokeWavyTextDecoration() { |
| m_context.setShouldAntialias(true); |
| m_context.strokePath(prepareWavyStrokePath()); |
| } |
| |
| /* |
| * Prepare a path for a cubic Bezier curve and repeat the same pattern long the |
| * the decoration's axis. The start point (p1), controlPoint1, controlPoint2 |
| * and end point (p2) of the Bezier curve form a diamond shape: |
| * |
| * step |
| * |-----------| |
| * |
| * controlPoint1 |
| * + |
| * |
| * |
| * . . |
| * . . |
| * . . |
| * (x1, y1) p1 + . + p2 (x2, y2) - <--- Decoration's axis |
| * . . | |
| * . . | |
| * . . | controlPointDistance |
| * | |
| * | |
| * + - |
| * controlPoint2 |
| * |
| * |-----------| |
| * step |
| */ |
| Path AppliedDecorationPainter::prepareWavyStrokePath() { |
| FloatPoint p1(m_startPoint + |
| FloatPoint(0, m_doubleOffset * m_wavyOffsetFactor)); |
| FloatPoint p2(m_startPoint + |
| FloatPoint(m_width, m_doubleOffset * m_wavyOffsetFactor)); |
| |
| m_context.adjustLineToPixelBoundaries(p1, p2, m_thickness, |
| m_context.getStrokeStyle()); |
| |
| Path path; |
| path.moveTo(p1); |
| |
| // Distance between decoration's axis and Bezier curve's control points. |
| // The height of the curve is based on this distance. Use a minimum of 6 |
| // pixels distance since |
| // the actual curve passes approximately at half of that distance, that is 3 |
| // pixels. |
| // The minimum height of the curve is also approximately 3 pixels. Increases |
| // the curve's height |
| // as strockThickness increases to make the curve looks better. |
| float controlPointDistance = 3 * std::max<float>(2, m_thickness); |
| |
| // Increment used to form the diamond shape between start point (p1), control |
| // points and end point (p2) along the axis of the decoration. Makes the |
| // curve wider as strockThickness increases to make the curve looks better. |
| float step = 2 * std::max<float>(2, m_thickness); |
| |
| bool isVerticalLine = (p1.x() == p2.x()); |
| |
| if (isVerticalLine) { |
| DCHECK(p1.x() == p2.x()); |
| |
| float xAxis = p1.x(); |
| float y1; |
| float y2; |
| |
| if (p1.y() < p2.y()) { |
| y1 = p1.y(); |
| y2 = p2.y(); |
| } else { |
| y1 = p2.y(); |
| y2 = p1.y(); |
| } |
| |
| adjustStepToDecorationLength(step, controlPointDistance, y2 - y1); |
| FloatPoint controlPoint1(xAxis + controlPointDistance, 0); |
| FloatPoint controlPoint2(xAxis - controlPointDistance, 0); |
| |
| for (float y = y1; y + 2 * step <= y2;) { |
| controlPoint1.setY(y + step); |
| controlPoint2.setY(y + step); |
| y += 2 * step; |
| path.addBezierCurveTo(controlPoint1, controlPoint2, FloatPoint(xAxis, y)); |
| } |
| } else { |
| DCHECK(p1.y() == p2.y()); |
| |
| float yAxis = p1.y(); |
| float x1; |
| float x2; |
| |
| if (p1.x() < p2.x()) { |
| x1 = p1.x(); |
| x2 = p2.x(); |
| } else { |
| x1 = p2.x(); |
| x2 = p1.x(); |
| } |
| |
| adjustStepToDecorationLength(step, controlPointDistance, x2 - x1); |
| FloatPoint controlPoint1(0, yAxis + controlPointDistance); |
| FloatPoint controlPoint2(0, yAxis - controlPointDistance); |
| |
| for (float x = x1; x + 2 * step <= x2;) { |
| controlPoint1.setX(x + step); |
| controlPoint2.setX(x + step); |
| x += 2 * step; |
| path.addBezierCurveTo(controlPoint1, controlPoint2, FloatPoint(x, yAxis)); |
| } |
| } |
| return path; |
| } |
| |
| typedef WTF::HashMap<const InlineTextBox*, TextBlobPtr> |
| InlineTextBoxBlobCacheMap; |
| static InlineTextBoxBlobCacheMap* gTextBlobCache; |
| |
| static const int misspellingLineThickness = 3; |
| |
| void InlineTextBoxPainter::removeFromTextBlobCache( |
| const InlineTextBox& inlineTextBox) { |
| if (gTextBlobCache) |
| gTextBlobCache->remove(&inlineTextBox); |
| } |
| |
| static TextBlobPtr* addToTextBlobCache(const InlineTextBox& inlineTextBox) { |
| if (!gTextBlobCache) |
| gTextBlobCache = new InlineTextBoxBlobCacheMap; |
| return &gTextBlobCache->add(&inlineTextBox, nullptr).storedValue->value; |
| } |
| |
| LayoutObject& InlineTextBoxPainter::inlineLayoutObject() const { |
| return *LineLayoutAPIShim::layoutObjectFrom( |
| m_inlineTextBox.getLineLayoutItem()); |
| } |
| |
| bool InlineTextBoxPainter::paintsMarkerHighlights( |
| const LayoutObject& layoutObject) { |
| return layoutObject.node() && |
| layoutObject.document().markers().hasMarkers(layoutObject.node()); |
| } |
| |
| static bool paintsCompositionMarkers(const LayoutObject& layoutObject) { |
| return layoutObject.node() && |
| layoutObject.document() |
| .markers() |
| .markersFor(layoutObject.node(), DocumentMarker::Composition) |
| .size() > 0; |
| } |
| |
| void InlineTextBoxPainter::paint(const PaintInfo& paintInfo, |
| const LayoutPoint& paintOffset) { |
| if (!shouldPaintTextBox(paintInfo)) |
| return; |
| |
| DCHECK(!shouldPaintSelfOutline(paintInfo.phase) && |
| !shouldPaintDescendantOutlines(paintInfo.phase)); |
| |
| LayoutRect logicalVisualOverflow = m_inlineTextBox.logicalOverflowRect(); |
| LayoutUnit logicalStart = |
| logicalVisualOverflow.x() + |
| (m_inlineTextBox.isHorizontal() ? paintOffset.x() : paintOffset.y()); |
| LayoutUnit logicalExtent = logicalVisualOverflow.width(); |
| |
| // We round the y-axis to ensure consistent line heights. |
| LayoutPoint adjustedPaintOffset = |
| LayoutPoint(paintOffset.x(), LayoutUnit(paintOffset.y().round())); |
| |
| if (m_inlineTextBox.isHorizontal()) { |
| if (!paintInfo.cullRect().intersectsHorizontalRange( |
| logicalStart, logicalStart + logicalExtent)) |
| return; |
| } else { |
| if (!paintInfo.cullRect().intersectsVerticalRange( |
| logicalStart, logicalStart + logicalExtent)) |
| return; |
| } |
| |
| bool isPrinting = paintInfo.isPrinting(); |
| |
| // Determine whether or not we're selected. |
| bool haveSelection = !isPrinting && paintInfo.phase != PaintPhaseTextClip && |
| m_inlineTextBox.getSelectionState() != SelectionNone; |
| if (!haveSelection && paintInfo.phase == PaintPhaseSelection) { |
| // When only painting the selection, don't bother to paint if there is none. |
| return; |
| } |
| |
| // The text clip phase already has a LayoutObjectDrawingRecorder. Text clips |
| // are initiated only in BoxPainter::paintFillLayer, which is already within a |
| // LayoutObjectDrawingRecorder. |
| Optional<DrawingRecorder> drawingRecorder; |
| if (paintInfo.phase != PaintPhaseTextClip) { |
| if (DrawingRecorder::useCachedDrawingIfPossible( |
| paintInfo.context, m_inlineTextBox, |
| DisplayItem::paintPhaseToDrawingType(paintInfo.phase))) |
| return; |
| LayoutRect paintRect(logicalVisualOverflow); |
| m_inlineTextBox.logicalRectToPhysicalRect(paintRect); |
| if (paintInfo.phase != PaintPhaseSelection && |
| (haveSelection || paintsMarkerHighlights(inlineLayoutObject()))) |
| paintRect.unite(m_inlineTextBox.localSelectionRect( |
| m_inlineTextBox.start(), |
| m_inlineTextBox.start() + m_inlineTextBox.len())); |
| paintRect.moveBy(adjustedPaintOffset); |
| drawingRecorder.emplace( |
| paintInfo.context, m_inlineTextBox, |
| DisplayItem::paintPhaseToDrawingType(paintInfo.phase), |
| FloatRect(paintRect)); |
| } |
| |
| GraphicsContext& context = paintInfo.context; |
| const ComputedStyle& styleToUse = |
| m_inlineTextBox.getLineLayoutItem().styleRef( |
| m_inlineTextBox.isFirstLineStyle()); |
| |
| LayoutPoint boxOrigin(m_inlineTextBox.physicalLocation()); |
| boxOrigin.move(adjustedPaintOffset.x(), adjustedPaintOffset.y()); |
| LayoutRect boxRect(boxOrigin, LayoutSize(m_inlineTextBox.logicalWidth(), |
| m_inlineTextBox.logicalHeight())); |
| |
| int length = m_inlineTextBox.len(); |
| StringView string = StringView(m_inlineTextBox.getLineLayoutItem().text(), |
| m_inlineTextBox.start(), length); |
| int maximumLength = m_inlineTextBox.getLineLayoutItem().textLength() - |
| m_inlineTextBox.start(); |
| |
| StringBuilder charactersWithHyphen; |
| TextRun textRun = m_inlineTextBox.constructTextRun( |
| styleToUse, string, maximumLength, |
| m_inlineTextBox.hasHyphen() ? &charactersWithHyphen : 0); |
| if (m_inlineTextBox.hasHyphen()) |
| length = textRun.length(); |
| |
| bool shouldRotate = false; |
| LayoutTextCombine* combinedText = nullptr; |
| if (!m_inlineTextBox.isHorizontal()) { |
| if (styleToUse.hasTextCombine() && |
| m_inlineTextBox.getLineLayoutItem().isCombineText()) { |
| combinedText = &toLayoutTextCombine(inlineLayoutObject()); |
| if (!combinedText->isCombined()) |
| combinedText = nullptr; |
| } |
| if (combinedText) { |
| combinedText->updateFont(); |
| boxRect.setWidth(combinedText->inlineWidthForLayout()); |
| // Justfication applies to before and after the combined text as if |
| // it is an ideographic character, and is prohibited inside the |
| // combined text. |
| if (float expansion = textRun.expansion()) { |
| textRun.setExpansion(0); |
| if (textRun.allowsLeadingExpansion()) { |
| if (textRun.allowsTrailingExpansion()) |
| expansion /= 2; |
| LayoutSize offset = |
| LayoutSize(LayoutUnit(), LayoutUnit::fromFloatRound(expansion)); |
| boxOrigin.move(offset); |
| boxRect.move(offset); |
| } |
| } |
| } else { |
| shouldRotate = true; |
| context.concatCTM(TextPainter::rotation(boxRect, TextPainter::Clockwise)); |
| } |
| } |
| |
| // Determine text colors. |
| TextPainter::Style textStyle = TextPainter::textPaintingStyle( |
| m_inlineTextBox.getLineLayoutItem(), styleToUse, paintInfo); |
| TextPainter::Style selectionStyle = TextPainter::selectionPaintingStyle( |
| m_inlineTextBox.getLineLayoutItem(), haveSelection, paintInfo, textStyle); |
| bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection); |
| bool paintSelectedTextSeparately = |
| !paintSelectedTextOnly && textStyle != selectionStyle; |
| |
| // Set our font. |
| const Font& font = styleToUse.font(); |
| const SimpleFontData* fontData = font.primaryFont(); |
| DCHECK(fontData); |
| |
| int ascent = fontData ? fontData->getFontMetrics().ascent() : 0; |
| LayoutPoint textOrigin(boxOrigin.x(), boxOrigin.y() + ascent); |
| |
| // 1. Paint backgrounds behind text if needed. Examples of such backgrounds |
| // include selection and composition highlights. |
| if (paintInfo.phase != PaintPhaseSelection && |
| paintInfo.phase != PaintPhaseTextClip && !isPrinting) { |
| paintDocumentMarkers(paintInfo, boxOrigin, styleToUse, font, |
| DocumentMarkerPaintPhase::Background); |
| |
| const LayoutObject& textBoxLayoutObject = inlineLayoutObject(); |
| if (haveSelection && !paintsCompositionMarkers(textBoxLayoutObject)) { |
| if (combinedText) |
| paintSelection<InlineTextBoxPainter::PaintOptions::CombinedText>( |
| context, boxRect, styleToUse, font, selectionStyle.fillColor, |
| combinedText); |
| else |
| paintSelection<InlineTextBoxPainter::PaintOptions::Normal>( |
| context, boxRect, styleToUse, font, selectionStyle.fillColor); |
| } |
| } |
| |
| // 2. Now paint the foreground, including text and decorations like |
| // underline/overline (in quirks mode only). |
| int selectionStart = 0; |
| int selectionEnd = 0; |
| if (paintSelectedTextOnly || paintSelectedTextSeparately) |
| m_inlineTextBox.selectionStartEnd(selectionStart, selectionEnd); |
| |
| bool respectHyphen = |
| selectionEnd == static_cast<int>(m_inlineTextBox.len()) && |
| m_inlineTextBox.hasHyphen(); |
| if (respectHyphen) |
| selectionEnd = textRun.length(); |
| |
| if (m_inlineTextBox.truncation() != cNoTruncation) { |
| selectionStart = |
| std::min<int>(selectionStart, m_inlineTextBox.truncation()); |
| selectionEnd = std::min<int>(selectionEnd, m_inlineTextBox.truncation()); |
| length = m_inlineTextBox.truncation(); |
| } |
| |
| TextPainter textPainter(context, font, textRun, textOrigin, boxRect, |
| m_inlineTextBox.isHorizontal()); |
| TextEmphasisPosition emphasisMarkPosition; |
| bool hasTextEmphasis = |
| m_inlineTextBox.getEmphasisMarkPosition(styleToUse, emphasisMarkPosition); |
| if (hasTextEmphasis) |
| textPainter.setEmphasisMark(styleToUse.textEmphasisMarkString(), |
| emphasisMarkPosition); |
| if (combinedText) |
| textPainter.setCombinedText(combinedText); |
| |
| if (!paintSelectedTextOnly) { |
| int startOffset = 0; |
| int endOffset = length; |
| if (paintSelectedTextSeparately && selectionStart < selectionEnd) { |
| startOffset = selectionEnd; |
| endOffset = selectionStart; |
| } |
| // Where the text and its flow have opposite directions then our offset into |
| // the text given by |truncation| is at the start of the part that will be |
| // visible. |
| if (m_inlineTextBox.truncation() != cNoTruncation && |
| m_inlineTextBox.getLineLayoutItem() |
| .containingBlock() |
| .style() |
| ->isLeftToRightDirection() != |
| m_inlineTextBox.isLeftToRightDirection()) { |
| startOffset = m_inlineTextBox.truncation(); |
| endOffset = textRun.length(); |
| } |
| |
| // FIXME: This cache should probably ultimately be held somewhere else. |
| // A hashmap is convenient to avoid a memory hit when the |
| // RuntimeEnabledFeature is off. |
| bool textBlobIsCacheable = startOffset == 0 && endOffset == length; |
| TextBlobPtr* cachedTextBlob = 0; |
| if (textBlobIsCacheable) |
| cachedTextBlob = addToTextBlobCache(m_inlineTextBox); |
| textPainter.paint(startOffset, endOffset, length, textStyle, |
| cachedTextBlob); |
| } |
| |
| if ((paintSelectedTextOnly || paintSelectedTextSeparately) && |
| selectionStart < selectionEnd) { |
| // paint only the text that is selected |
| bool textBlobIsCacheable = selectionStart == 0 && selectionEnd == length; |
| TextBlobPtr* cachedTextBlob = 0; |
| if (textBlobIsCacheable) |
| cachedTextBlob = addToTextBlobCache(m_inlineTextBox); |
| textPainter.paint(selectionStart, selectionEnd, length, selectionStyle, |
| cachedTextBlob); |
| } |
| |
| // Paint decorations |
| if (styleToUse.textDecorationsInEffect() != TextDecorationNone && |
| !paintSelectedTextOnly) { |
| GraphicsContextStateSaver stateSaver(context, false); |
| |
| TextPainter::updateGraphicsContext( |
| context, textStyle, m_inlineTextBox.isHorizontal(), stateSaver); |
| |
| if (combinedText) |
| context.concatCTM(TextPainter::rotation(boxRect, TextPainter::Clockwise)); |
| paintDecorations(textPainter, paintInfo, boxOrigin, |
| styleToUse.appliedTextDecorations()); |
| if (combinedText) |
| context.concatCTM( |
| TextPainter::rotation(boxRect, TextPainter::Counterclockwise)); |
| } |
| |
| if (paintInfo.phase == PaintPhaseForeground) |
| paintDocumentMarkers(paintInfo, boxOrigin, styleToUse, font, |
| DocumentMarkerPaintPhase::Foreground); |
| |
| if (shouldRotate) |
| context.concatCTM( |
| TextPainter::rotation(boxRect, TextPainter::Counterclockwise)); |
| } |
| |
| bool InlineTextBoxPainter::shouldPaintTextBox(const PaintInfo& paintInfo) { |
| // When painting selection, we want to include a highlight when the |
| // selection spans line breaks. In other cases such as invisible elements |
| // or those with no text that are not line breaks, we can skip painting |
| // wholesale. |
| // TODO(wkorman): Constrain line break painting to appropriate paint phase. |
| // This code path is only called in PaintPhaseForeground whereas we would |
| // expect PaintPhaseSelection. The existing haveSelection logic in paint() |
| // tests for != PaintPhaseTextClip. |
| if (m_inlineTextBox.getLineLayoutItem().style()->visibility() != |
| EVisibility::Visible || |
| m_inlineTextBox.truncation() == cFullTruncation || !m_inlineTextBox.len()) |
| return false; |
| return true; |
| } |
| |
| unsigned InlineTextBoxPainter::underlinePaintStart( |
| const CompositionUnderline& underline) { |
| DCHECK(m_inlineTextBox.truncation() != cFullTruncation); |
| DCHECK(m_inlineTextBox.len()); |
| |
| // Start painting at the beginning of the text or the specified underline |
| // start offset, whichever is higher. |
| unsigned paintStart = |
| std::max(m_inlineTextBox.start(), underline.startOffset()); |
| // Cap the maximum paint start to (if no truncation) the last character, |
| // else the last character before the truncation ellipsis. |
| return std::min(paintStart, (m_inlineTextBox.truncation() == cNoTruncation) |
| ? m_inlineTextBox.end() |
| : m_inlineTextBox.start() + |
| m_inlineTextBox.truncation() - 1); |
| } |
| |
| unsigned InlineTextBoxPainter::underlinePaintEnd( |
| const CompositionUnderline& underline) { |
| DCHECK(m_inlineTextBox.truncation() != cFullTruncation); |
| DCHECK(m_inlineTextBox.len()); |
| |
| // End painting just past the end of the text or the specified underline end |
| // offset, whichever is lower. |
| unsigned paintEnd = std::min( |
| m_inlineTextBox.end() + 1, |
| underline.endOffset()); // end() points at the last char, not past it. |
| // Cap the maximum paint end to (if no truncation) one past the last |
| // character, else one past the last character before the truncation |
| // ellipsis. |
| return std::min(paintEnd, |
| (m_inlineTextBox.truncation() == cNoTruncation) |
| ? m_inlineTextBox.end() + 1 |
| : m_inlineTextBox.start() + m_inlineTextBox.truncation()); |
| } |
| |
| void InlineTextBoxPainter::paintSingleCompositionBackgroundRun( |
| GraphicsContext& context, |
| const LayoutPoint& boxOrigin, |
| const ComputedStyle& style, |
| const Font& font, |
| Color backgroundColor, |
| int startPos, |
| int endPos) { |
| if (backgroundColor == Color::transparent) |
| return; |
| |
| int sPos = std::max(startPos - static_cast<int>(m_inlineTextBox.start()), 0); |
| int ePos = std::min(endPos - static_cast<int>(m_inlineTextBox.start()), |
| static_cast<int>(m_inlineTextBox.len())); |
| if (sPos >= ePos) |
| return; |
| |
| int deltaY = |
| (m_inlineTextBox.getLineLayoutItem().style()->isFlippedLinesWritingMode() |
| ? m_inlineTextBox.root().selectionBottom() - |
| m_inlineTextBox.logicalBottom() |
| : m_inlineTextBox.logicalTop() - |
| m_inlineTextBox.root().selectionTop()) |
| .toInt(); |
| int selHeight = m_inlineTextBox.root().selectionHeight().toInt(); |
| FloatPoint localOrigin(boxOrigin.x().toFloat(), |
| boxOrigin.y().toFloat() - deltaY); |
| context.drawHighlightForText(font, m_inlineTextBox.constructTextRun(style), |
| localOrigin, selHeight, backgroundColor, sPos, |
| ePos); |
| } |
| |
| void InlineTextBoxPainter::paintDocumentMarkers( |
| const PaintInfo& paintInfo, |
| const LayoutPoint& boxOrigin, |
| const ComputedStyle& style, |
| const Font& font, |
| DocumentMarkerPaintPhase markerPaintPhase) { |
| if (!m_inlineTextBox.getLineLayoutItem().node()) |
| return; |
| |
| DCHECK(m_inlineTextBox.truncation() != cFullTruncation); |
| DCHECK(m_inlineTextBox.len()); |
| |
| DocumentMarkerVector markers = |
| m_inlineTextBox.getLineLayoutItem().document().markers().markersFor( |
| m_inlineTextBox.getLineLayoutItem().node()); |
| DocumentMarkerVector::const_iterator markerIt = markers.begin(); |
| |
| // Give any document markers that touch this run a chance to draw before the |
| // text has been drawn. Note end() points at the last char, not one past it |
| // like endOffset and ranges do. |
| for (; markerIt != markers.end(); ++markerIt) { |
| DocumentMarker* marker = *markerIt; |
| |
| // Paint either the background markers or the foreground markers, but not |
| // both. |
| switch (marker->type()) { |
| case DocumentMarker::Grammar: |
| case DocumentMarker::Spelling: |
| if (markerPaintPhase == DocumentMarkerPaintPhase::Background) |
| continue; |
| break; |
| case DocumentMarker::TextMatch: |
| case DocumentMarker::Composition: |
| break; |
| default: |
| continue; |
| } |
| |
| if (marker->endOffset() <= m_inlineTextBox.start()) { |
| // marker is completely before this run. This might be a marker that sits |
| // before the first run we draw, or markers that were within runs we |
| // skipped due to truncation. |
| continue; |
| } |
| if (marker->startOffset() > m_inlineTextBox.end()) { |
| // marker is completely after this run, bail. A later run will paint it. |
| break; |
| } |
| |
| // marker intersects this run. Paint it. |
| switch (marker->type()) { |
| case DocumentMarker::Spelling: |
| m_inlineTextBox.paintDocumentMarker(paintInfo.context, boxOrigin, |
| marker, style, font, false); |
| break; |
| case DocumentMarker::Grammar: |
| m_inlineTextBox.paintDocumentMarker(paintInfo.context, boxOrigin, |
| marker, style, font, true); |
| break; |
| case DocumentMarker::TextMatch: |
| if (markerPaintPhase == DocumentMarkerPaintPhase::Background) |
| m_inlineTextBox.paintTextMatchMarkerBackground(paintInfo, boxOrigin, |
| marker, style, font); |
| else |
| m_inlineTextBox.paintTextMatchMarkerForeground(paintInfo, boxOrigin, |
| marker, style, font); |
| break; |
| case DocumentMarker::Composition: { |
| CompositionUnderline underline( |
| marker->startOffset(), marker->endOffset(), |
| marker->underlineColor(), marker->thick(), |
| marker->backgroundColor()); |
| if (markerPaintPhase == DocumentMarkerPaintPhase::Background) |
| paintSingleCompositionBackgroundRun( |
| paintInfo.context, boxOrigin, style, font, |
| underline.backgroundColor(), underlinePaintStart(underline), |
| underlinePaintEnd(underline)); |
| else |
| paintCompositionUnderline(paintInfo.context, boxOrigin, underline); |
| } break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| } |
| } |
| |
| static GraphicsContext::DocumentMarkerLineStyle lineStyleForMarkerType( |
| DocumentMarker::MarkerType markerType) { |
| switch (markerType) { |
| case DocumentMarker::Spelling: |
| return GraphicsContext::DocumentMarkerSpellingLineStyle; |
| case DocumentMarker::Grammar: |
| return GraphicsContext::DocumentMarkerGrammarLineStyle; |
| default: |
| ASSERT_NOT_REACHED(); |
| return GraphicsContext::DocumentMarkerSpellingLineStyle; |
| } |
| } |
| |
| void InlineTextBoxPainter::paintDocumentMarker(GraphicsContext& context, |
| const LayoutPoint& boxOrigin, |
| DocumentMarker* marker, |
| const ComputedStyle& style, |
| const Font& font, |
| bool grammar) { |
| // Never print spelling/grammar markers (5327887) |
| if (m_inlineTextBox.getLineLayoutItem().document().printing()) |
| return; |
| |
| if (m_inlineTextBox.truncation() == cFullTruncation) |
| return; |
| |
| LayoutUnit start; // start of line to draw, relative to tx |
| LayoutUnit width = m_inlineTextBox.logicalWidth(); // how much line to draw |
| |
| // Determine whether we need to measure text |
| bool markerSpansWholeBox = true; |
| if (m_inlineTextBox.start() <= marker->startOffset()) |
| markerSpansWholeBox = false; |
| if ((m_inlineTextBox.end() + 1) != |
| marker->endOffset()) // end points at the last char, not past it |
| markerSpansWholeBox = false; |
| if (m_inlineTextBox.truncation() != cNoTruncation) |
| markerSpansWholeBox = false; |
| |
| if (!markerSpansWholeBox || grammar) { |
| int startPosition = |
| std::max<int>(marker->startOffset() - m_inlineTextBox.start(), 0); |
| int endPosition = std::min<int>( |
| marker->endOffset() - static_cast<int>(m_inlineTextBox.start()), |
| m_inlineTextBox.len()); |
| |
| if (m_inlineTextBox.truncation() != cNoTruncation) |
| endPosition = std::min<int>(endPosition, m_inlineTextBox.truncation()); |
| |
| // Calculate start & width |
| int deltaY = (m_inlineTextBox.getLineLayoutItem() |
| .style() |
| ->isFlippedLinesWritingMode() |
| ? m_inlineTextBox.root().selectionBottom() - |
| m_inlineTextBox.logicalBottom() |
| : m_inlineTextBox.logicalTop() - |
| m_inlineTextBox.root().selectionTop()) |
| .toInt(); |
| int selHeight = m_inlineTextBox.root().selectionHeight().toInt(); |
| LayoutPoint startPoint(boxOrigin.x(), boxOrigin.y() - deltaY); |
| TextRun run = m_inlineTextBox.constructTextRun(style); |
| |
| // FIXME: Convert the document markers to float rects. |
| IntRect markerRect = enclosingIntRect(font.selectionRectForText( |
| run, FloatPoint(startPoint), selHeight, startPosition, endPosition)); |
| start = markerRect.x() - startPoint.x(); |
| width = LayoutUnit(markerRect.width()); |
| } |
| |
| // IMPORTANT: The misspelling underline is not considered when calculating the |
| // text bounds, so we have to make sure to fit within those bounds. This |
| // means the top pixel(s) of the underline will overlap the bottom pixel(s) of |
| // the glyphs in smaller font sizes. The alternatives are to increase the |
| // line spacing (bad!!) or decrease the underline thickness. The overlap is |
| // actually the most useful, and matches what AppKit does. So, we generally |
| // place the underline at the bottom of the text, but in larger fonts that's |
| // not so good so we pin to two pixels under the baseline. |
| int lineThickness = misspellingLineThickness; |
| |
| const SimpleFontData* fontData = |
| m_inlineTextBox.getLineLayoutItem() |
| .style(m_inlineTextBox.isFirstLineStyle()) |
| ->font() |
| .primaryFont(); |
| DCHECK(fontData); |
| int baseline = fontData ? fontData->getFontMetrics().ascent() : 0; |
| int descent = (m_inlineTextBox.logicalHeight() - baseline).toInt(); |
| int underlineOffset; |
| if (descent <= (lineThickness + 2)) { |
| // Place the underline at the very bottom of the text in small/medium fonts. |
| underlineOffset = (m_inlineTextBox.logicalHeight() - lineThickness).toInt(); |
| } else { |
| // In larger fonts, though, place the underline up near the baseline to |
| // prevent a big gap. |
| underlineOffset = baseline + 2; |
| } |
| context.drawLineForDocumentMarker( |
| FloatPoint((boxOrigin.x() + start).toFloat(), |
| (boxOrigin.y() + underlineOffset).toFloat()), |
| width.toFloat(), lineStyleForMarkerType(marker->type())); |
| } |
| |
| template <InlineTextBoxPainter::PaintOptions options> |
| void InlineTextBoxPainter::paintSelection(GraphicsContext& context, |
| const LayoutRect& boxRect, |
| const ComputedStyle& style, |
| const Font& font, |
| Color textColor, |
| LayoutTextCombine* combinedText) { |
| // See if we have a selection to paint at all. |
| int sPos, ePos; |
| m_inlineTextBox.selectionStartEnd(sPos, ePos); |
| if (sPos >= ePos) |
| return; |
| |
| Color c = m_inlineTextBox.getLineLayoutItem().selectionBackgroundColor(); |
| if (!c.alpha()) |
| return; |
| |
| // If the text color ends up being the same as the selection background, |
| // invert the selection background. |
| if (textColor == c) |
| c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue()); |
| |
| // If the text is truncated, let the thing being painted in the truncation |
| // draw its own highlight. |
| unsigned start = m_inlineTextBox.start(); |
| int length = m_inlineTextBox.len(); |
| bool ltr = m_inlineTextBox.isLeftToRightDirection(); |
| bool flowIsLTR = |
| m_inlineTextBox.getLineLayoutItem().style()->isLeftToRightDirection(); |
| if (m_inlineTextBox.truncation() != cNoTruncation) { |
| start = ltr == flowIsLTR ? m_inlineTextBox.start() |
| : m_inlineTextBox.truncation(); |
| length = ltr == flowIsLTR |
| ? m_inlineTextBox.truncation() |
| : m_inlineTextBox.len() - m_inlineTextBox.truncation(); |
| } |
| StringView string(m_inlineTextBox.getLineLayoutItem().text(), start, |
| static_cast<unsigned>(length)); |
| |
| StringBuilder charactersWithHyphen; |
| bool respectHyphen = ePos == length && m_inlineTextBox.hasHyphen(); |
| TextRun textRun = m_inlineTextBox.constructTextRun( |
| style, string, m_inlineTextBox.getLineLayoutItem().textLength() - |
| m_inlineTextBox.start(), |
| respectHyphen ? &charactersWithHyphen : 0); |
| if (respectHyphen) |
| ePos = textRun.length(); |
| |
| GraphicsContextStateSaver stateSaver(context); |
| |
| if (options == InlineTextBoxPainter::PaintOptions::CombinedText) { |
| DCHECK(combinedText); |
| // We can't use the height of m_inlineTextBox because LayoutTextCombine's |
| // inlineTextBox is horizontal within vertical flow |
| combinedText->transformToInlineCoordinates(context, boxRect, true); |
| context.drawHighlightForText(font, textRun, FloatPoint(boxRect.location()), |
| boxRect.height().toInt(), c, sPos, ePos); |
| return; |
| } |
| |
| LayoutUnit selectionBottom = m_inlineTextBox.root().selectionBottom(); |
| LayoutUnit selectionTop = m_inlineTextBox.root().selectionTop(); |
| |
| int deltaY = roundToInt( |
| m_inlineTextBox.getLineLayoutItem().style()->isFlippedLinesWritingMode() |
| ? selectionBottom - m_inlineTextBox.logicalBottom() |
| : m_inlineTextBox.logicalTop() - selectionTop); |
| int selHeight = std::max(0, roundToInt(selectionBottom - selectionTop)); |
| |
| FloatPoint localOrigin(boxRect.x().toFloat(), |
| (boxRect.y() - deltaY).toFloat()); |
| LayoutRect selectionRect = LayoutRect( |
| font.selectionRectForText(textRun, localOrigin, selHeight, sPos, ePos)); |
| if (m_inlineTextBox.hasWrappedSelectionNewline() |
| // For line breaks, just painting a selection where the line break itself |
| // is rendered is sufficient. |
| && !m_inlineTextBox.isLineBreak()) |
| expandToIncludeNewlineForSelection(selectionRect); |
| |
| // Line breaks report themselves as having zero width for layout purposes, |
| // and so will end up positioned at (0, 0), even though we paint their |
| // selection highlight with character width. For RTL then, we have to |
| // explicitly shift the selection rect over to paint in the right location. |
| if (!m_inlineTextBox.isLeftToRightDirection() && |
| m_inlineTextBox.isLineBreak()) |
| selectionRect.move(-selectionRect.width(), LayoutUnit()); |
| if (!flowIsLTR && m_inlineTextBox.truncation() != cNoTruncation) |
| selectionRect.move(m_inlineTextBox.logicalWidth() - selectionRect.width(), |
| LayoutUnit()); |
| |
| context.fillRect(FloatRect(selectionRect), c); |
| } |
| |
| void InlineTextBoxPainter::expandToIncludeNewlineForSelection( |
| LayoutRect& rect) { |
| FloatRectOutsets outsets = FloatRectOutsets(); |
| float spaceWidth = m_inlineTextBox.newlineSpaceWidth(); |
| if (m_inlineTextBox.isLeftToRightDirection()) |
| outsets.setRight(spaceWidth); |
| else |
| outsets.setLeft(spaceWidth); |
| rect.expand(outsets); |
| } |
| |
| void InlineTextBoxPainter::paintDecorations( |
| TextPainter& textPainter, |
| const PaintInfo& paintInfo, |
| const LayoutPoint& boxOrigin, |
| const Vector<AppliedTextDecoration>& decorations) { |
| if (m_inlineTextBox.truncation() == cFullTruncation) |
| return; |
| |
| GraphicsContext& context = paintInfo.context; |
| GraphicsContextStateSaver stateSaver(context); |
| |
| LayoutPoint localOrigin(boxOrigin); |
| |
| LayoutUnit width = m_inlineTextBox.logicalWidth(); |
| if (m_inlineTextBox.truncation() != cNoTruncation) { |
| bool ltr = m_inlineTextBox.isLeftToRightDirection(); |
| bool flowIsLTR = |
| m_inlineTextBox.getLineLayoutItem().style()->isLeftToRightDirection(); |
| width = LayoutUnit(m_inlineTextBox.getLineLayoutItem().width( |
| ltr == flowIsLTR ? m_inlineTextBox.start() |
| : m_inlineTextBox.truncation(), |
| ltr == flowIsLTR ? m_inlineTextBox.truncation() |
| : m_inlineTextBox.len() - m_inlineTextBox.truncation(), |
| m_inlineTextBox.textPos(), |
| flowIsLTR ? TextDirection::Ltr : TextDirection::Rtl, |
| m_inlineTextBox.isFirstLineStyle())); |
| if (!flowIsLTR) |
| localOrigin.move(m_inlineTextBox.logicalWidth() - width, LayoutUnit()); |
| } |
| |
| LayoutObject& textBoxLayoutObject = inlineLayoutObject(); |
| |
| const ComputedStyle& styleToUse = |
| textBoxLayoutObject.styleRef(m_inlineTextBox.isFirstLineStyle()); |
| const SimpleFontData* fontData = styleToUse.font().primaryFont(); |
| DCHECK(fontData); |
| float baseline = fontData ? fontData->getFontMetrics().floatAscent() : 0; |
| |
| // Set the thick of the line to be 10% (or something else ?)of the computed |
| // font size and not less than 1px. Using computedFontSize should take care |
| // of zoom as well. |
| |
| // Update Underline thickness, in case we have Faulty Font Metrics calculating |
| // underline thickness by old method. |
| float textDecorationThickness = 0.0; |
| int fontHeightInt = 0; |
| if (fontData) { |
| textDecorationThickness = fontData->getFontMetrics().underlineThickness(); |
| fontHeightInt = (int)(fontData->getFontMetrics().floatHeight() + 0.5); |
| } |
| if ((textDecorationThickness == 0.f) || |
| (textDecorationThickness >= (fontHeightInt >> 1))) |
| textDecorationThickness = |
| std::max(1.f, styleToUse.computedFontSize() / 10.f); |
| |
| context.setStrokeThickness(textDecorationThickness); |
| |
| bool antialiasDecoration = shouldSetDecorationAntialias(decorations); |
| |
| // Offset between lines - always non-zero, so lines never cross each other. |
| float doubleOffset = textDecorationThickness + 1.f; |
| bool skipIntercepts = |
| styleToUse.getTextDecorationSkip() & TextDecorationSkipInk; |
| |
| for (const AppliedTextDecoration& decoration : decorations) { |
| TextDecoration lines = decoration.lines(); |
| if ((lines & TextDecorationUnderline) && fontData) { |
| const int underlineOffset = computeUnderlineOffset( |
| styleToUse.getTextUnderlinePosition(), fontData->getFontMetrics(), |
| &m_inlineTextBox, textDecorationThickness); |
| AppliedDecorationPainter decorationPainter( |
| context, FloatPoint(localOrigin) + FloatPoint(0, underlineOffset), |
| width.toFloat(), decoration, textDecorationThickness, doubleOffset, 1, |
| antialiasDecoration); |
| if (skipIntercepts) { |
| textPainter.clipDecorationsStripe( |
| -baseline + decorationPainter.decorationBounds().y() - |
| FloatPoint(localOrigin).y(), |
| decorationPainter.decorationBounds().height(), |
| textDecorationThickness); |
| } |
| decorationPainter.paint(); |
| } |
| if (lines & TextDecorationOverline) { |
| AppliedDecorationPainter decorationPainter( |
| context, FloatPoint(localOrigin), width.toFloat(), decoration, |
| textDecorationThickness, -doubleOffset, 1, antialiasDecoration); |
| if (skipIntercepts) { |
| textPainter.clipDecorationsStripe( |
| -baseline + decorationPainter.decorationBounds().y() - |
| FloatPoint(localOrigin).y(), |
| decorationPainter.decorationBounds().height(), |
| textDecorationThickness); |
| } |
| decorationPainter.paint(); |
| } |
| if (lines & TextDecorationLineThrough) { |
| const float lineThroughOffset = 2 * baseline / 3; |
| AppliedDecorationPainter decorationPainter( |
| context, FloatPoint(localOrigin) + FloatPoint(0, lineThroughOffset), |
| width.toFloat(), decoration, textDecorationThickness, doubleOffset, 0, |
| antialiasDecoration); |
| if (skipIntercepts) { |
| textPainter.clipDecorationsStripe( |
| -baseline + decorationPainter.decorationBounds().y() - |
| FloatPoint(localOrigin).y(), |
| decorationPainter.decorationBounds().height(), |
| textDecorationThickness); |
| } |
| decorationPainter.paint(); |
| } |
| } |
| } |
| |
| void InlineTextBoxPainter::paintCompositionUnderline( |
| GraphicsContext& context, |
| const LayoutPoint& boxOrigin, |
| const CompositionUnderline& underline) { |
| if (underline.color() == Color::transparent) |
| return; |
| |
| if (m_inlineTextBox.truncation() == cFullTruncation) |
| return; |
| |
| unsigned paintStart = underlinePaintStart(underline); |
| unsigned paintEnd = underlinePaintEnd(underline); |
| DCHECK_LT(paintStart, paintEnd); |
| |
| // start of line to draw |
| float start = |
| paintStart == m_inlineTextBox.start() |
| ? 0 |
| : m_inlineTextBox.getLineLayoutItem().width( |
| m_inlineTextBox.start(), paintStart - m_inlineTextBox.start(), |
| m_inlineTextBox.textPos(), |
| m_inlineTextBox.isLeftToRightDirection() ? TextDirection::Ltr |
| : TextDirection::Rtl, |
| m_inlineTextBox.isFirstLineStyle()); |
| // how much line to draw |
| float width; |
| bool ltr = m_inlineTextBox.isLeftToRightDirection(); |
| bool flowIsLTR = |
| m_inlineTextBox.getLineLayoutItem().style()->isLeftToRightDirection(); |
| if (paintStart == m_inlineTextBox.start() && |
| paintEnd == m_inlineTextBox.end() + 1) { |
| width = m_inlineTextBox.logicalWidth().toFloat(); |
| } else { |
| unsigned paintFrom = ltr == flowIsLTR ? paintStart : paintEnd; |
| unsigned paintLength = |
| ltr == flowIsLTR |
| ? paintEnd - paintStart |
| : m_inlineTextBox.start() + m_inlineTextBox.len() - paintEnd; |
| width = m_inlineTextBox.getLineLayoutItem().width( |
| paintFrom, paintLength, LayoutUnit(m_inlineTextBox.textPos() + start), |
| flowIsLTR ? TextDirection::Ltr : TextDirection::Rtl, |
| m_inlineTextBox.isFirstLineStyle()); |
| } |
| // In RTL mode, start and width are computed from the right end of the text |
| // box: starting at |logicalWidth| - |start| and continuing left by |width| to |
| // |logicalWidth| - |start| - |width|. We will draw that line, but backwards: |
| // |logicalWidth| - |start| - |width| to |logicalWidth| - |start|. |
| if (!flowIsLTR) |
| start = m_inlineTextBox.logicalWidth().toFloat() - width - start; |
| |
| // Thick marked text underlines are 2px thick as long as there is room for the |
| // 2px line under the baseline. All other marked text underlines are 1px |
| // thick. If there's not enough space the underline will touch or overlap |
| // characters. |
| int lineThickness = 1; |
| const SimpleFontData* fontData = |
| m_inlineTextBox.getLineLayoutItem() |
| .style(m_inlineTextBox.isFirstLineStyle()) |
| ->font() |
| .primaryFont(); |
| DCHECK(fontData); |
| int baseline = fontData ? fontData->getFontMetrics().ascent() : 0; |
| if (underline.thick() && m_inlineTextBox.logicalHeight() - baseline >= 2) |
| lineThickness = 2; |
| |
| // We need to have some space between underlines of subsequent clauses, |
| // because some input methods do not use different underline styles for those. |
| // We make each line shorter, which has a harmless side effect of shortening |
| // the first and last clauses, too. |
| start += 1; |
| width -= 2; |
| |
| context.setStrokeColor(underline.color()); |
| context.setStrokeThickness(lineThickness); |
| context.drawLineForText( |
| FloatPoint( |
| boxOrigin.x() + start, |
| (boxOrigin.y() + m_inlineTextBox.logicalHeight() - lineThickness) |
| .toFloat()), |
| width); |
| } |
| |
| void InlineTextBoxPainter::paintTextMatchMarkerForeground( |
| const PaintInfo& paintInfo, |
| const LayoutPoint& boxOrigin, |
| DocumentMarker* marker, |
| const ComputedStyle& style, |
| const Font& font) { |
| if (!inlineLayoutObject().frame()->editor().markedTextMatchesAreHighlighted()) |
| return; |
| |
| // TODO(ramya.v): Extract this into a helper function and share many copies of |
| // this code. |
| int sPos = |
| std::max(marker->startOffset() - m_inlineTextBox.start(), (unsigned)0); |
| int ePos = std::min(marker->endOffset() - m_inlineTextBox.start(), |
| m_inlineTextBox.len()); |
| TextRun run = m_inlineTextBox.constructTextRun(style); |
| |
| Color textColor = |
| LayoutTheme::theme().platformTextSearchColor(marker->activeMatch()); |
| if (style.visitedDependentColor(CSSPropertyColor) == textColor) |
| return; |
| |
| const SimpleFontData* fontData = font.primaryFont(); |
| DCHECK(fontData); |
| if (!fontData) |
| return; |
| |
| TextPainter::Style textStyle; |
| textStyle.currentColor = textStyle.fillColor = textStyle.strokeColor = |
| textStyle.emphasisMarkColor = textColor; |
| textStyle.strokeWidth = style.textStrokeWidth(); |
| textStyle.shadow = 0; |
| |
| LayoutRect boxRect(boxOrigin, LayoutSize(m_inlineTextBox.logicalWidth(), |
| m_inlineTextBox.logicalHeight())); |
| LayoutPoint textOrigin(boxOrigin.x(), |
| boxOrigin.y() + fontData->getFontMetrics().ascent()); |
| TextPainter textPainter(paintInfo.context, font, run, textOrigin, boxRect, |
| m_inlineTextBox.isHorizontal()); |
| |
| textPainter.paint(sPos, ePos, m_inlineTextBox.len(), textStyle, 0); |
| } |
| |
| void InlineTextBoxPainter::paintTextMatchMarkerBackground( |
| const PaintInfo& paintInfo, |
| const LayoutPoint& boxOrigin, |
| DocumentMarker* marker, |
| const ComputedStyle& style, |
| const Font& font) { |
| if (!LineLayoutAPIShim::layoutObjectFrom(m_inlineTextBox.getLineLayoutItem()) |
| ->frame() |
| ->editor() |
| .markedTextMatchesAreHighlighted()) |
| return; |
| |
| int sPos = |
| std::max(marker->startOffset() - m_inlineTextBox.start(), (unsigned)0); |
| int ePos = std::min(marker->endOffset() - m_inlineTextBox.start(), |
| m_inlineTextBox.len()); |
| TextRun run = m_inlineTextBox.constructTextRun(style); |
| |
| Color color = LayoutTheme::theme().platformTextSearchHighlightColor( |
| marker->activeMatch()); |
| GraphicsContext& context = paintInfo.context; |
| GraphicsContextStateSaver stateSaver(context); |
| |
| LayoutRect boxRect(boxOrigin, LayoutSize(m_inlineTextBox.logicalWidth(), |
| m_inlineTextBox.logicalHeight())); |
| context.clip(FloatRect(boxRect)); |
| context.drawHighlightForText(font, run, FloatPoint(boxOrigin), |
| boxRect.height().toInt(), color, sPos, ePos); |
| } |
| |
| } // namespace blink |
