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Unified Diff: Source/core/rendering/InlineTextBox.cpp

Issue 620243002: Move painting code from InlineTextBox to InlineTextBoxPainter. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Final version. Created 6 years, 2 months ago
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Index: Source/core/rendering/InlineTextBox.cpp
diff --git a/Source/core/rendering/InlineTextBox.cpp b/Source/core/rendering/InlineTextBox.cpp
index 24b24c55749c3ca464c6740252b51483da5dfaaf..819ad9d32570409f59b7b74d13d6ffb88dbc4fae 100644
--- a/Source/core/rendering/InlineTextBox.cpp
+++ b/Source/core/rendering/InlineTextBox.cpp
@@ -33,7 +33,7 @@
#include "core/editing/InputMethodController.h"
#include "core/frame/LocalFrame.h"
#include "core/page/Page.h"
-#include "core/paint/BoxPainter.h"
+#include "core/paint/InlineTextBoxPainter.h"
#include "core/rendering/AbstractInlineTextBox.h"
#include "core/rendering/EllipsisBox.h"
#include "core/rendering/HitTestResult.h"
@@ -71,10 +71,6 @@ COMPILE_ASSERT(sizeof(InlineTextBox) == sizeof(SameSizeAsInlineTextBox), InlineT
typedef WTF::HashMap<const InlineTextBox*, LayoutRect> InlineTextBoxOverflowMap;
static InlineTextBoxOverflowMap* gTextBoxesWithOverflow;
-typedef WTF::HashMap<const InlineTextBox*, TextBlobPtr> InlineTextBoxBlobCacheMap;
-static InlineTextBoxBlobCacheMap* gTextBlobCache;
-
-static const int misspellingLineThickness = 3;
void InlineTextBox::destroy()
{
@@ -82,16 +78,14 @@ void InlineTextBox::destroy()
if (!knownToHaveNoOverflow() && gTextBoxesWithOverflow)
gTextBoxesWithOverflow->remove(this);
- if (gTextBlobCache)
- gTextBlobCache->remove(this);
+ InlineTextBoxPainter::removeFromTextBlobCache(*this);
InlineBox::destroy();
}
void InlineTextBox::markDirty()
{
// FIXME: Is it actually possible to try and paint a dirty InlineTextBox?
- if (gTextBlobCache)
- gTextBlobCache->remove(this);
+ InlineTextBoxPainter::removeFromTextBlobCache(*this);
m_len = 0;
m_start = 0;
@@ -133,21 +127,6 @@ LayoutUnit InlineTextBox::lineHeight() const
return toRenderBoxModelObject(renderer().parent())->lineHeight(isFirstLineStyle(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOnContainingLine);
}
-LayoutUnit InlineTextBox::selectionTop()
-{
- return root().selectionTop();
-}
-
-LayoutUnit InlineTextBox::selectionBottom()
-{
- return root().selectionBottom();
-}
-
-LayoutUnit InlineTextBox::selectionHeight()
-{
- return root().selectionHeight();
-}
-
bool InlineTextBox::isSelected(int startPos, int endPos) const
{
int sPos = std::max(startPos - m_start, 0);
@@ -213,8 +192,8 @@ LayoutRect InlineTextBox::localSelectionRect(int startPos, int endPos)
FontCachePurgePreventer fontCachePurgePreventer;
- LayoutUnit selTop = selectionTop();
- LayoutUnit selHeight = selectionHeight();
+ LayoutUnit selTop = root().selectionTop();
+ LayoutUnit selHeight = root().selectionHeight();
RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
const Font& font = styleToUse->font();
@@ -378,199 +357,7 @@ bool InlineTextBox::getEmphasisMarkPosition(RenderStyle* style, TextEmphasisPosi
void InlineTextBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit /*lineTop*/, LayoutUnit /*lineBottom*/)
{
- if (isLineBreak() || !paintInfo.shouldPaintWithinRoot(&renderer()) || renderer().style()->visibility() != VISIBLE
- || m_truncation == cFullTruncation || paintInfo.phase == PaintPhaseOutline || !m_len)
- return;
-
- ASSERT(paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines);
-
- LayoutRect logicalVisualOverflow = logicalOverflowRect();
- LayoutUnit logicalStart = logicalVisualOverflow.x() + (isHorizontal() ? paintOffset.x() : paintOffset.y());
- LayoutUnit logicalExtent = logicalVisualOverflow.width();
-
- LayoutUnit paintEnd = isHorizontal() ? paintInfo.rect.maxX() : paintInfo.rect.maxY();
- LayoutUnit paintStart = isHorizontal() ? paintInfo.rect.x() : paintInfo.rect.y();
-
- // When subpixel font scaling is enabled text runs are positioned at
- // subpixel boundaries on the x-axis and thus there is no reason to
- // snap the x value. We still round the y-axis to ensure consistent
- // line heights.
- LayoutPoint adjustedPaintOffset = RuntimeEnabledFeatures::subpixelFontScalingEnabled()
- ? LayoutPoint(paintOffset.x(), paintOffset.y().round())
- : roundedIntPoint(paintOffset);
-
- if (logicalStart >= paintEnd || logicalStart + logicalExtent <= paintStart)
- return;
-
- bool isPrinting = renderer().document().printing();
-
- // Determine whether or not we're selected.
- bool haveSelection = !isPrinting && paintInfo.phase != PaintPhaseTextClip && selectionState() != RenderObject::SelectionNone;
- if (!haveSelection && paintInfo.phase == PaintPhaseSelection)
- // When only painting the selection, don't bother to paint if there is none.
- return;
-
- if (m_truncation != cNoTruncation) {
- if (renderer().containingBlock()->style()->isLeftToRightDirection() != isLeftToRightDirection()) {
- // Make the visible fragment of text hug the edge closest to the rest of the run by moving the origin
- // at which we start drawing text.
- // e.g. In the case of LTR text truncated in an RTL Context, the correct behavior is:
- // |Hello|CBA| -> |...He|CBA|
- // In order to draw the fragment "He" aligned to the right edge of it's box, we need to start drawing
- // farther to the right.
- // NOTE: WebKit's behavior differs from that of IE which appears to just overlay the ellipsis on top of the
- // truncated string i.e. |Hello|CBA| -> |...lo|CBA|
- LayoutUnit widthOfVisibleText = renderer().width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
- LayoutUnit widthOfHiddenText = m_logicalWidth - widthOfVisibleText;
- // FIXME: The hit testing logic also needs to take this translation into account.
- LayoutSize truncationOffset(isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText, 0);
- adjustedPaintOffset.move(isHorizontal() ? truncationOffset : truncationOffset.transposedSize());
- }
- }
-
- GraphicsContext* context = paintInfo.context;
- RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
-
- adjustedPaintOffset.move(0, styleToUse->isHorizontalWritingMode() ? 0 : -logicalHeight());
-
- FloatPoint boxOrigin = locationIncludingFlipping();
- boxOrigin.move(adjustedPaintOffset.x().toFloat(), adjustedPaintOffset.y().toFloat());
- FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), logicalHeight()));
-
- RenderCombineText* combinedText = styleToUse->hasTextCombine() && renderer().isCombineText() && toRenderCombineText(renderer()).isCombined() ? &toRenderCombineText(renderer()) : 0;
-
- bool shouldRotate = !isHorizontal() && !combinedText;
- if (shouldRotate)
- context->concatCTM(rotation(boxRect, Clockwise));
-
- // Determine whether or not we have composition underlines to draw.
- bool containsComposition = renderer().node() && renderer().frame()->inputMethodController().compositionNode() == renderer().node();
- bool useCustomUnderlines = containsComposition && renderer().frame()->inputMethodController().compositionUsesCustomUnderlines();
-
- // Determine text colors.
- TextPainter::Style textStyle = TextPainter::textPaintingStyle(renderer(), styleToUse, paintInfo.forceBlackText(), isPrinting);
- TextPainter::Style selectionStyle = TextPainter::selectionPaintingStyle(renderer(), haveSelection, paintInfo.forceBlackText(), isPrinting, textStyle);
- bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection);
- bool paintSelectedTextSeparately = !paintSelectedTextOnly && textStyle != selectionStyle;
-
- // Set our font.
- const Font& font = styleToUse->font();
-
- FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
- if (combinedText)
- combinedText->adjustTextOrigin(textOrigin, boxRect);
-
- // 1. Paint backgrounds behind text if needed. Examples of such backgrounds include selection
- // and composition highlights.
- if (paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseTextClip && !isPrinting) {
- if (containsComposition) {
- paintCompositionBackgrounds(context, boxOrigin, styleToUse, font, useCustomUnderlines);
- }
-
- paintDocumentMarkers(context, boxOrigin, styleToUse, font, true);
-
- if (haveSelection && !useCustomUnderlines)
- paintSelection(context, boxOrigin, styleToUse, font, selectionStyle.fillColor);
- }
-
- // 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only).
- int length = m_len;
- int maximumLength;
- StringView string;
- if (!combinedText) {
- string = renderer().text().createView();
- if (static_cast<unsigned>(length) != string.length() || m_start)
- string.narrow(m_start, length);
- maximumLength = renderer().textLength() - m_start;
- } else {
- combinedText->getStringToRender(m_start, string, length);
- maximumLength = length;
- }
-
- StringBuilder charactersWithHyphen;
- TextRun textRun = constructTextRun(styleToUse, font, string, maximumLength, hasHyphen() ? &charactersWithHyphen : 0);
- if (hasHyphen())
- length = textRun.length();
-
- int selectionStart = 0;
- int selectionEnd = 0;
- if (paintSelectedTextOnly || paintSelectedTextSeparately)
- selectionStartEnd(selectionStart, selectionEnd);
-
- bool respectHyphen = selectionEnd == m_len && hasHyphen();
- if (respectHyphen)
- selectionEnd = textRun.length();
-
- if (m_truncation != cNoTruncation) {
- selectionStart = std::min<int>(selectionStart, m_truncation);
- selectionEnd = std::min<int>(selectionEnd, m_truncation);
- length = m_truncation;
- }
-
- TextPainter textPainter(context, font, textRun, textOrigin, boxRect, isHorizontal());
- TextEmphasisPosition emphasisMarkPosition;
- bool hasTextEmphasis = getEmphasisMarkPosition(styleToUse, emphasisMarkPosition);
- if (hasTextEmphasis)
- textPainter.setEmphasisMark(styleToUse->textEmphasisMarkString(), emphasisMarkPosition);
- if (combinedText)
- textPainter.setCombinedText(combinedText);
-
- if (!paintSelectedTextOnly) {
- // FIXME: Truncate right-to-left text correctly.
- int startOffset = 0;
- int endOffset = length;
- if (paintSelectedTextSeparately && selectionStart < selectionEnd) {
- startOffset = selectionEnd;
- endOffset = selectionStart;
- }
-
- // 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 = RuntimeEnabledFeatures::textBlobEnabled() && startOffset == 0 && endOffset == length;
- TextBlobPtr* cachedTextBlob = 0;
- if (textBlobIsCacheable) {
- if (!gTextBlobCache)
- gTextBlobCache = new InlineTextBoxBlobCacheMap;
- cachedTextBlob = &gTextBlobCache->add(this, nullptr).storedValue->value;
- }
- textPainter.paint(startOffset, endOffset, length, textStyle, cachedTextBlob);
- }
-
- if ((paintSelectedTextOnly || paintSelectedTextSeparately) && selectionStart < selectionEnd) {
- // paint only the text that is selected
- textPainter.paint(selectionStart, selectionEnd, length, selectionStyle);
- }
-
- // Paint decorations
- TextDecoration textDecorations = styleToUse->textDecorationsInEffect();
- if (textDecorations != TextDecorationNone && !paintSelectedTextOnly) {
- GraphicsContextStateSaver stateSaver(*context, false);
- TextPainter::updateGraphicsContext(context, textStyle, isHorizontal(), stateSaver);
- if (combinedText)
- context->concatCTM(rotation(boxRect, Clockwise));
- paintDecoration(context, boxOrigin, textDecorations);
- if (combinedText)
- context->concatCTM(rotation(boxRect, Counterclockwise));
- }
-
- if (paintInfo.phase == PaintPhaseForeground) {
- paintDocumentMarkers(context, boxOrigin, styleToUse, font, false);
-
- // Paint custom underlines for compositions.
- if (useCustomUnderlines) {
- const Vector<CompositionUnderline>& underlines = renderer().frame()->inputMethodController().customCompositionUnderlines();
- CompositionUnderlineRangeFilter filter(underlines, start(), end());
- for (CompositionUnderlineRangeFilter::ConstIterator it = filter.begin(); it != filter.end(); ++it) {
- if (it->color == Color::transparent)
- continue;
- paintCompositionUnderline(context, boxOrigin, *it);
- }
- }
- }
-
- if (shouldRotate)
- context->concatCTM(rotation(boxRect, Counterclockwise));
+ InlineTextBoxPainter(*this).paint(paintInfo, paintOffset);
}
void InlineTextBox::selectionStartEnd(int& sPos, int& ePos) const
@@ -591,560 +378,14 @@ void InlineTextBox::selectionStartEnd(int& sPos, int& ePos) const
ePos = std::min(endPos - m_start, (int)m_len);
}
-void InlineTextBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, Color textColor)
-{
- // See if we have a selection to paint at all.
- int sPos, ePos;
- selectionStartEnd(sPos, ePos);
- if (sPos >= ePos)
- return;
-
- Color c = renderer().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.
- int length = m_truncation != cNoTruncation ? m_truncation : m_len;
- StringView string = renderer().text().createView();
-
- if (string.length() != static_cast<unsigned>(length) || m_start)
- string.narrow(m_start, length);
-
- StringBuilder charactersWithHyphen;
- bool respectHyphen = ePos == length && hasHyphen();
- TextRun textRun = constructTextRun(style, font, string, renderer().textLength() - m_start, respectHyphen ? &charactersWithHyphen : 0);
- if (respectHyphen)
- ePos = textRun.length();
-
- LayoutUnit selectionBottom = root().selectionBottom();
- LayoutUnit selectionTop = root().selectionTopAdjustedForPrecedingBlock();
-
- int deltaY = roundToInt(renderer().style()->isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - selectionTop);
- int selHeight = std::max(0, roundToInt(selectionBottom - selectionTop));
-
- FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
- FloatRect clipRect(localOrigin, FloatSize(m_logicalWidth, selHeight));
-
- GraphicsContextStateSaver stateSaver(*context);
- context->clip(clipRect);
- context->drawHighlightForText(font, textRun, localOrigin, selHeight, c, sPos, ePos);
-}
-
-unsigned InlineTextBox::underlinePaintStart(const CompositionUnderline& underline)
-{
- return std::max(static_cast<unsigned>(m_start), underline.startOffset);
-}
-
-unsigned InlineTextBox::underlinePaintEnd(const CompositionUnderline& underline)
-{
- unsigned paintEnd = std::min(end() + 1, underline.endOffset); // end() points at the last char, not past it.
- if (m_truncation != cNoTruncation)
- paintEnd = std::min(paintEnd, static_cast<unsigned>(m_start + m_truncation));
- return paintEnd;
-}
-
-void InlineTextBox::paintSingleCompositionBackgroundRun(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, Color backgroundColor, int startPos, int endPos)
-{
- int sPos = std::max(startPos - m_start, 0);
- int ePos = std::min(endPos - m_start, static_cast<int>(m_len));
- if (sPos >= ePos)
- return;
-
- int deltaY = renderer().style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
- int selHeight = selectionHeight();
- FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
- context->drawHighlightForText(font, constructTextRun(style, font), localOrigin, selHeight, backgroundColor, sPos, ePos);
-}
-
-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 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 float offset = inlineTextBox->root().maxLogicalTop() - inlineTextBox->logicalTop();
- if (offset > 0)
- return inlineTextBox->logicalHeight() + gap + offset;
- return inlineTextBox->logicalHeight() + gap;
- }
- }
-
- ASSERT_NOT_REACHED();
- return fontMetrics.ascent() + gap;
-}
-
-static void adjustStepToDecorationLength(float& step, float& controlPointDistance, float length)
-{
- ASSERT(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;
-}
-
-/*
- * Draw one 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
- */
-static void strokeWavyTextDecoration(GraphicsContext* context, FloatPoint p1, FloatPoint p2, float strokeThickness)
-{
- context->adjustLineToPixelBoundaries(p1, p2, strokeThickness, context->strokeStyle());
-
- 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, strokeThickness);
-
- // 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, strokeThickness);
-
- bool isVerticalLine = (p1.x() == p2.x());
-
- if (isVerticalLine) {
- ASSERT(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 {
- ASSERT(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));
- }
- }
-
- context->setShouldAntialias(true);
- context->strokePath(path);
-}
-
-static bool shouldSetDecorationAntialias(TextDecorationStyle decorationStyle)
-{
- return decorationStyle == TextDecorationStyleDotted || decorationStyle == TextDecorationStyleDashed;
-}
-
-static bool shouldSetDecorationAntialias(TextDecorationStyle underline, TextDecorationStyle overline, TextDecorationStyle linethrough)
-{
- return shouldSetDecorationAntialias(underline) || shouldSetDecorationAntialias(overline) || shouldSetDecorationAntialias(linethrough);
-}
-
-static void paintAppliedDecoration(GraphicsContext* context, FloatPoint start, float width, float doubleOffset, int wavyOffsetFactor,
- RenderObject::AppliedTextDecoration decoration, float thickness, bool antialiasDecoration, bool isPrinting)
-{
- context->setStrokeStyle(textDecorationStyleToStrokeStyle(decoration.style));
- context->setStrokeColor(decoration.color);
-
- switch (decoration.style) {
- case TextDecorationStyleWavy:
- strokeWavyTextDecoration(context, start + FloatPoint(0, doubleOffset * wavyOffsetFactor), start + FloatPoint(width, doubleOffset * wavyOffsetFactor), thickness);
- break;
- case TextDecorationStyleDotted:
- case TextDecorationStyleDashed:
- context->setShouldAntialias(antialiasDecoration);
- // Fall through
- default:
- context->drawLineForText(start, width, isPrinting);
-
- if (decoration.style == TextDecorationStyleDouble)
- context->drawLineForText(start + FloatPoint(0, doubleOffset), width, isPrinting);
- }
-}
-
-void InlineTextBox::paintDecoration(GraphicsContext* context, const FloatPoint& boxOrigin, TextDecoration deco)
-{
- GraphicsContextStateSaver stateSaver(*context);
-
- if (m_truncation == cFullTruncation)
- return;
-
- FloatPoint localOrigin = boxOrigin;
-
- float width = m_logicalWidth;
- if (m_truncation != cNoTruncation) {
- width = renderer().width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
- if (!isLeftToRightDirection())
- localOrigin.move(m_logicalWidth - width, 0);
- }
-
- // Get the text decoration colors.
- RenderObject::AppliedTextDecoration underline, overline, linethrough;
- renderer().getTextDecorations(deco, underline, overline, linethrough, true);
- if (isFirstLineStyle())
- renderer().getTextDecorations(deco, underline, overline, linethrough, true, true);
-
- // Use a special function for underlines to get the positioning exactly right.
- bool isPrinting = renderer().document().printing();
-
- RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
- int baseline = styleToUse->fontMetrics().ascent();
-
- // 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 = styleToUse->fontMetrics().underlineThickness();
- int fontHeightInt = (int)(styleToUse->fontMetrics().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(overline.style, underline.style, linethrough.style)
- && BoxPainter::shouldAntialiasLines(context);
-
- // Offset between lines - always non-zero, so lines never cross each other.
- float doubleOffset = textDecorationThickness + 1.f;
-
- if (deco & TextDecorationUnderline) {
- const int underlineOffset = computeUnderlineOffset(styleToUse->textUnderlinePosition(), styleToUse->fontMetrics(), this, textDecorationThickness);
- paintAppliedDecoration(context, localOrigin + FloatPoint(0, underlineOffset), width, doubleOffset, 1, underline, textDecorationThickness, antialiasDecoration, isPrinting);
- }
- if (deco & TextDecorationOverline) {
- paintAppliedDecoration(context, localOrigin, width, -doubleOffset, 1, overline, textDecorationThickness, antialiasDecoration, isPrinting);
- }
- if (deco & TextDecorationLineThrough) {
- const float lineThroughOffset = 2 * baseline / 3;
- paintAppliedDecoration(context, localOrigin + FloatPoint(0, lineThroughOffset), width, doubleOffset, 0, linethrough, textDecorationThickness, antialiasDecoration, isPrinting);
- }
-}
-
-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 InlineTextBox::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, RenderStyle* style, const Font& font, bool grammar)
{
- // Never print spelling/grammar markers (5327887)
- if (renderer().document().printing())
- return;
-
- if (m_truncation == cFullTruncation)
- return;
-
- float start = 0; // start of line to draw, relative to tx
- float width = m_logicalWidth; // how much line to draw
-
- // Determine whether we need to measure text
- bool markerSpansWholeBox = true;
- if (m_start <= (int)marker->startOffset())
- markerSpansWholeBox = false;
- if ((end() + 1) != marker->endOffset()) // end points at the last char, not past it
- markerSpansWholeBox = false;
- if (m_truncation != cNoTruncation)
- markerSpansWholeBox = false;
-
- if (!markerSpansWholeBox || grammar) {
- int startPosition = std::max<int>(marker->startOffset() - m_start, 0);
- int endPosition = std::min<int>(marker->endOffset() - m_start, m_len);
-
- if (m_truncation != cNoTruncation)
- endPosition = std::min<int>(endPosition, m_truncation);
-
- // Calculate start & width
- int deltaY = renderer().style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
- int selHeight = selectionHeight();
- FloatPoint startPoint(boxOrigin.x(), boxOrigin.y() - deltaY);
- TextRun run = constructTextRun(style, font);
-
- // FIXME: Convert the document markers to float rects.
- IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, startPoint, selHeight, startPosition, endPosition));
- start = markerRect.x() - startPoint.x();
- width = markerRect.width();
-
- // Store rendered rects for bad grammar markers, so we can hit-test against it elsewhere in order to
- // display a toolTip. We don't do this for misspelling markers.
- if (grammar) {
- markerRect.move(-boxOrigin.x(), -boxOrigin.y());
- markerRect = renderer().localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox();
- toRenderedDocumentMarker(marker)->setRenderedRect(markerRect);
- }
- }
-
- // 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;
- int baseline = renderer().style(isFirstLineStyle())->fontMetrics().ascent();
- int descent = logicalHeight() - baseline;
- int underlineOffset;
- if (descent <= (2 + lineThickness)) {
- // Place the underline at the very bottom of the text in small/medium fonts.
- underlineOffset = logicalHeight() - lineThickness;
- } else {
- // In larger fonts, though, place the underline up near the baseline to prevent a big gap.
- underlineOffset = baseline + 2;
- }
- pt->drawLineForDocumentMarker(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + underlineOffset), width, lineStyleForMarkerType(marker->type()));
+ InlineTextBoxPainter(*this).paintDocumentMarker(pt, boxOrigin, marker, style, font, grammar);
}
void InlineTextBox::paintTextMatchMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, RenderStyle* style, const Font& font)
{
- // Use same y positioning and height as for selection, so that when the selection and this highlight are on
- // the same word there are no pieces sticking out.
- int deltaY = renderer().style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
- int selHeight = selectionHeight();
-
- int sPos = std::max(marker->startOffset() - m_start, (unsigned)0);
- int ePos = std::min(marker->endOffset() - m_start, (unsigned)m_len);
- TextRun run = constructTextRun(style, font);
-
- // Always compute and store the rect associated with this marker. The computed rect is in absolute coordinates.
- IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, IntPoint(x(), selectionTop()), selHeight, sPos, ePos));
- markerRect = renderer().localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox();
- toRenderedDocumentMarker(marker)->setRenderedRect(markerRect);
-
- // Optionally highlight the text
- if (renderer().frame()->editor().markedTextMatchesAreHighlighted()) {
- Color color = marker->activeMatch() ?
- RenderTheme::theme().platformActiveTextSearchHighlightColor() :
- RenderTheme::theme().platformInactiveTextSearchHighlightColor();
- GraphicsContextStateSaver stateSaver(*pt);
- pt->clip(FloatRect(boxOrigin.x(), boxOrigin.y() - deltaY, m_logicalWidth, selHeight));
- pt->drawHighlightForText(font, run, FloatPoint(boxOrigin.x(), boxOrigin.y() - deltaY), selHeight, color, sPos, ePos);
- }
-}
-
-void InlineTextBox::paintCompositionBackgrounds(GraphicsContext* pt, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, bool useCustomUnderlines)
-{
- if (useCustomUnderlines) {
- // Paint custom background highlights for compositions.
- const Vector<CompositionUnderline>& underlines = renderer().frame()->inputMethodController().customCompositionUnderlines();
- CompositionUnderlineRangeFilter filter(underlines, start(), end());
- for (CompositionUnderlineRangeFilter::ConstIterator it = filter.begin(); it != filter.end(); ++it) {
- if (it->backgroundColor == Color::transparent)
- continue;
- paintSingleCompositionBackgroundRun(pt, boxOrigin, style, font, it->backgroundColor, underlinePaintStart(*it), underlinePaintEnd(*it));
- }
-
- } else {
- paintSingleCompositionBackgroundRun(pt, boxOrigin, style, font, RenderTheme::theme().platformDefaultCompositionBackgroundColor(),
- renderer().frame()->inputMethodController().compositionStart(),
- renderer().frame()->inputMethodController().compositionEnd());
- }
-}
-
-void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, bool background)
-{
- if (!renderer().node())
- return;
-
- DocumentMarkerVector markers = renderer().document().markers().markersFor(renderer().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 (background)
- continue;
- break;
- case DocumentMarker::TextMatch:
- if (!background)
- continue;
- break;
- default:
- continue;
- }
-
- if (marker->endOffset() <= 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() > 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:
- paintDocumentMarker(pt, boxOrigin, marker, style, font, false);
- break;
- case DocumentMarker::Grammar:
- paintDocumentMarker(pt, boxOrigin, marker, style, font, true);
- break;
- case DocumentMarker::TextMatch:
- paintTextMatchMarker(pt, boxOrigin, marker, style, font);
- break;
- default:
- ASSERT_NOT_REACHED();
- }
-
- }
-}
-
-void InlineTextBox::paintCompositionUnderline(GraphicsContext* ctx, const FloatPoint& boxOrigin, const CompositionUnderline& underline)
-{
- if (m_truncation == cFullTruncation)
- return;
-
- unsigned paintStart = underlinePaintStart(underline);
- unsigned paintEnd = underlinePaintEnd(underline);
-
- // start of line to draw, relative to paintOffset.
- float start = paintStart == static_cast<unsigned>(m_start) ? 0 :
- renderer().width(m_start, paintStart - m_start, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
- // how much line to draw
- float width = (paintStart == static_cast<unsigned>(m_start) && paintEnd == static_cast<unsigned>(end()) + 1) ? m_logicalWidth :
- renderer().width(paintStart, paintEnd - paintStart, textPos() + start, isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
-
- // 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;
- int baseline = renderer().style(isFirstLineStyle())->fontMetrics().ascent();
- if (underline.thick && 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;
-
- ctx->setStrokeColor(underline.color);
- ctx->setStrokeThickness(lineThickness);
- ctx->drawLineForText(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + logicalHeight() - lineThickness), width, renderer().document().printing());
+ InlineTextBoxPainter(*this).paintTextMatchMarker(pt, boxOrigin, marker, style, font);
}
int InlineTextBox::caretMinOffset() const
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