| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "InlineTextBox.h" |
| |
| #include "Chrome.h" |
| #include "ChromeClient.h" |
| #include "DashArray.h" |
| #include "Document.h" |
| #include "DocumentMarkerController.h" |
| #include "Editor.h" |
| #include "EllipsisBox.h" |
| #include "FontCache.h" |
| #include "Frame.h" |
| #include "GraphicsContext.h" |
| #include "HitTestResult.h" |
| #include "ImageBuffer.h" |
| #include "Page.h" |
| #include "PaintInfo.h" |
| #include "RenderedDocumentMarker.h" |
| #include "RenderBlock.h" |
| #include "RenderCombineText.h" |
| #include "RenderLineBreak.h" |
| #include "RenderRubyRun.h" |
| #include "RenderRubyText.h" |
| #include "RenderTheme.h" |
| #include "RenderView.h" |
| #include "Settings.h" |
| #include "SVGTextRunRenderingContext.h" |
| #include "Text.h" |
| #include "TextPaintStyle.h" |
| #include "TextPainter.h" |
| #include "break_lines.h" |
| #include <wtf/text/CString.h> |
| |
| namespace WebCore { |
| |
| struct SameSizeAsInlineTextBox : public InlineBox { |
| unsigned variables[1]; |
| unsigned short variables2[2]; |
| void* pointers[2]; |
| }; |
| |
| COMPILE_ASSERT(sizeof(InlineTextBox) == sizeof(SameSizeAsInlineTextBox), InlineTextBox_should_stay_small); |
| |
| typedef WTF::HashMap<const InlineTextBox*, LayoutRect> InlineTextBoxOverflowMap; |
| static InlineTextBoxOverflowMap* gTextBoxesWithOverflow; |
| |
| #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) |
| static bool compareTuples(std::pair<float, float> l, std::pair<float, float> r) |
| { |
| return l.first < r.first; |
| } |
| |
| static DashArray translateIntersectionPointsToSkipInkBoundaries(const DashArray& intersections, float dilationAmount, float totalWidth) |
| { |
| ASSERT(!(intersections.size() % 2)); |
| |
| // Step 1: Make pairs so we can sort based on range starting-point. We dilate the ranges in this step as well. |
| Vector<std::pair<float, float>> tuples; |
| for (auto i = intersections.begin(); i != intersections.end(); i++, i++) |
| tuples.append(std::make_pair(*i - dilationAmount, *(i + 1) + dilationAmount)); |
| std::sort(tuples.begin(), tuples.end(), &compareTuples); |
| |
| // Step 2: Deal with intersecting ranges. |
| Vector<std::pair<float, float>> intermediateTuples; |
| if (tuples.size() >= 2) { |
| intermediateTuples.append(*tuples.begin()); |
| for (auto i = tuples.begin() + 1; i != tuples.end(); i++) { |
| float& firstEnd = intermediateTuples.last().second; |
| float secondStart = i->first; |
| float secondEnd = i->second; |
| if (secondStart <= firstEnd && secondEnd <= firstEnd) { |
| // Ignore this range completely |
| } else if (secondStart <= firstEnd) |
| firstEnd = secondEnd; |
| else |
| intermediateTuples.append(*i); |
| } |
| } else |
| intermediateTuples = tuples; |
| |
| // Step 3: Output the space between the ranges, but only if the space warrants an underline. |
| float previous = 0; |
| DashArray result; |
| for (auto i = intermediateTuples.begin(); i != intermediateTuples.end(); i++) { |
| if (i->first - previous > dilationAmount) { |
| result.append(previous); |
| result.append(i->first); |
| } |
| previous = i->second; |
| } |
| if (totalWidth - previous > dilationAmount) { |
| result.append(previous); |
| result.append(totalWidth); |
| } |
| |
| return result; |
| } |
| |
| static void drawSkipInkUnderline(TextPainter& textPainter, GraphicsContext& context, FloatPoint localOrigin, float underlineOffset, float width, bool isPrinting) |
| { |
| FloatPoint adjustedLocalOrigin = localOrigin; |
| adjustedLocalOrigin.move(0, underlineOffset); |
| FloatRect underlineBoundingBox = context.computeLineBoundsForText(adjustedLocalOrigin, width, isPrinting); |
| DashArray intersections = textPainter.dashesForIntersectionsWithRect(underlineBoundingBox); |
| DashArray a = translateIntersectionPointsToSkipInkBoundaries(intersections, underlineBoundingBox.height(), width); |
| |
| ASSERT(!(a.size() % 2)); |
| context.drawLinesForText(adjustedLocalOrigin, a, isPrinting); |
| } |
| #endif |
| |
| InlineTextBox::~InlineTextBox() |
| { |
| if (!knownToHaveNoOverflow() && gTextBoxesWithOverflow) |
| gTextBoxesWithOverflow->remove(this); |
| } |
| |
| void InlineTextBox::markDirty(bool dirty) |
| { |
| if (dirty) { |
| m_len = 0; |
| m_start = 0; |
| } |
| InlineBox::markDirty(dirty); |
| } |
| |
| LayoutRect InlineTextBox::logicalOverflowRect() const |
| { |
| if (knownToHaveNoOverflow() || !gTextBoxesWithOverflow) |
| return enclosingIntRect(logicalFrameRect()); |
| return gTextBoxesWithOverflow->get(this); |
| } |
| |
| void InlineTextBox::setLogicalOverflowRect(const LayoutRect& rect) |
| { |
| ASSERT(!knownToHaveNoOverflow()); |
| if (!gTextBoxesWithOverflow) |
| gTextBoxesWithOverflow = new InlineTextBoxOverflowMap; |
| gTextBoxesWithOverflow->add(this, rect); |
| } |
| |
| int InlineTextBox::baselinePosition(FontBaseline baselineType) const |
| { |
| if (!parent()) |
| return 0; |
| if (&parent()->renderer() == renderer().parent()) |
| return parent()->baselinePosition(baselineType); |
| return toRenderBoxModelObject(renderer().parent())->baselinePosition(baselineType, isFirstLine(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOnContainingLine); |
| } |
| |
| LayoutUnit InlineTextBox::lineHeight() const |
| { |
| if (!renderer().parent()) |
| return 0; |
| if (&parent()->renderer() == renderer().parent()) |
| return parent()->lineHeight(); |
| return toRenderBoxModelObject(renderer().parent())->lineHeight(isFirstLine(), isHorizontal() ? HorizontalLine : VerticalLine, PositionOnContainingLine); |
| } |
| |
| LayoutUnit InlineTextBox::selectionTop() const |
| { |
| return root().selectionTop(); |
| } |
| |
| LayoutUnit InlineTextBox::selectionBottom() const |
| { |
| return root().selectionBottom(); |
| } |
| |
| LayoutUnit InlineTextBox::selectionHeight() const |
| { |
| return root().selectionHeight(); |
| } |
| |
| bool InlineTextBox::isSelected(int startPos, int endPos) const |
| { |
| LayoutUnit sPos = std::max<LayoutUnit>(startPos - m_start, 0); |
| LayoutUnit ePos = std::min<LayoutUnit>(endPos - m_start, m_len); |
| return (sPos < ePos); |
| } |
| |
| RenderObject::SelectionState InlineTextBox::selectionState() |
| { |
| RenderObject::SelectionState state = renderer().selectionState(); |
| if (state == RenderObject::SelectionStart || state == RenderObject::SelectionEnd || state == RenderObject::SelectionBoth) { |
| int startPos, endPos; |
| renderer().selectionStartEnd(startPos, endPos); |
| // The position after a hard line break is considered to be past its end. |
| int lastSelectable = start() + len() - (isLineBreak() ? 1 : 0); |
| |
| bool start = (state != RenderObject::SelectionEnd && startPos >= m_start && startPos < m_start + m_len); |
| bool end = (state != RenderObject::SelectionStart && endPos > m_start && endPos <= lastSelectable); |
| if (start && end) |
| state = RenderObject::SelectionBoth; |
| else if (start) |
| state = RenderObject::SelectionStart; |
| else if (end) |
| state = RenderObject::SelectionEnd; |
| else if ((state == RenderObject::SelectionEnd || startPos < m_start) && |
| (state == RenderObject::SelectionStart || endPos > lastSelectable)) |
| state = RenderObject::SelectionInside; |
| else if (state == RenderObject::SelectionBoth) |
| state = RenderObject::SelectionNone; |
| } |
| |
| // If there are ellipsis following, make sure their selection is updated. |
| if (m_truncation != cNoTruncation && root().ellipsisBox()) { |
| EllipsisBox* ellipsis = root().ellipsisBox(); |
| if (state != RenderObject::SelectionNone) { |
| int start, end; |
| selectionStartEnd(start, end); |
| // The ellipsis should be considered to be selected if the end of |
| // the selection is past the beginning of the truncation and the |
| // beginning of the selection is before or at the beginning of the |
| // truncation. |
| ellipsis->setSelectionState(end >= m_truncation && start <= m_truncation ? |
| RenderObject::SelectionInside : RenderObject::SelectionNone); |
| } else |
| ellipsis->setSelectionState(RenderObject::SelectionNone); |
| } |
| |
| return state; |
| } |
| |
| static void adjustCharactersAndLengthForHyphen(BufferForAppendingHyphen& charactersWithHyphen, const RenderStyle& style, String& string, int& length) |
| { |
| const AtomicString& hyphenString = style.hyphenString(); |
| charactersWithHyphen.reserveCapacity(length + hyphenString.length()); |
| charactersWithHyphen.append(string); |
| charactersWithHyphen.append(hyphenString); |
| string = charactersWithHyphen.toString(); |
| length += hyphenString.length(); |
| } |
| |
| static const Font& fontToUse(const RenderStyle& style, const RenderText& renderer) |
| { |
| if (style.hasTextCombine() && renderer.isCombineText()) { |
| const RenderCombineText& textCombineRenderer = toRenderCombineText(renderer); |
| if (textCombineRenderer.isCombined()) |
| return textCombineRenderer.textCombineFont(); |
| } |
| return style.font(); |
| } |
| |
| LayoutRect InlineTextBox::localSelectionRect(int startPos, int endPos) const |
| { |
| int sPos = std::max(startPos - m_start, 0); |
| int ePos = std::min(endPos - m_start, (int)m_len); |
| |
| if (sPos > ePos) |
| return LayoutRect(); |
| |
| FontCachePurgePreventer fontCachePurgePreventer; |
| |
| LayoutUnit selTop = selectionTop(); |
| LayoutUnit selHeight = selectionHeight(); |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const Font& font = fontToUse(lineStyle, renderer()); |
| |
| BufferForAppendingHyphen charactersWithHyphen; |
| bool respectHyphen = ePos == m_len && hasHyphen(); |
| TextRun textRun = constructTextRun(lineStyle, font, respectHyphen ? &charactersWithHyphen : 0); |
| if (respectHyphen) |
| endPos = textRun.length(); |
| |
| FloatPoint startingPoint = FloatPoint(logicalLeft(), selTop); |
| LayoutRect r; |
| if (sPos || ePos != static_cast<int>(m_len)) |
| r = enclosingIntRect(font.selectionRectForText(textRun, startingPoint, selHeight, sPos, ePos)); |
| else // Avoid computing the font width when the entire line box is selected as an optimization. |
| r = enclosingIntRect(FloatRect(startingPoint, FloatSize(m_logicalWidth, selHeight))); |
| |
| LayoutUnit logicalWidth = r.width(); |
| if (r.x() > logicalRight()) |
| logicalWidth = 0; |
| else if (r.maxX() > logicalRight()) |
| logicalWidth = logicalRight() - r.x(); |
| |
| LayoutPoint topPoint = isHorizontal() ? LayoutPoint(r.x(), selTop) : LayoutPoint(selTop, r.x()); |
| LayoutUnit width = isHorizontal() ? logicalWidth : selHeight; |
| LayoutUnit height = isHorizontal() ? selHeight : logicalWidth; |
| |
| return LayoutRect(topPoint, LayoutSize(width, height)); |
| } |
| |
| void InlineTextBox::deleteLine() |
| { |
| renderer().removeTextBox(*this); |
| delete this; |
| } |
| |
| void InlineTextBox::extractLine() |
| { |
| if (extracted()) |
| return; |
| |
| renderer().extractTextBox(*this); |
| } |
| |
| void InlineTextBox::attachLine() |
| { |
| if (!extracted()) |
| return; |
| |
| renderer().attachTextBox(*this); |
| } |
| |
| float InlineTextBox::placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) |
| { |
| if (foundBox) { |
| m_truncation = cFullTruncation; |
| return -1; |
| } |
| |
| // For LTR this is the left edge of the box, for RTL, the right edge in parent coordinates. |
| float ellipsisX = flowIsLTR ? visibleRightEdge - ellipsisWidth : visibleLeftEdge + ellipsisWidth; |
| |
| // Criteria for full truncation: |
| // LTR: the left edge of the ellipsis is to the left of our text run. |
| // RTL: the right edge of the ellipsis is to the right of our text run. |
| bool ltrFullTruncation = flowIsLTR && ellipsisX <= left(); |
| bool rtlFullTruncation = !flowIsLTR && ellipsisX >= left() + logicalWidth(); |
| if (ltrFullTruncation || rtlFullTruncation) { |
| // Too far. Just set full truncation, but return -1 and let the ellipsis just be placed at the edge of the box. |
| m_truncation = cFullTruncation; |
| foundBox = true; |
| return -1; |
| } |
| |
| bool ltrEllipsisWithinBox = flowIsLTR && (ellipsisX < right()); |
| bool rtlEllipsisWithinBox = !flowIsLTR && (ellipsisX > left()); |
| if (ltrEllipsisWithinBox || rtlEllipsisWithinBox) { |
| foundBox = true; |
| |
| // The inline box may have different directionality than it's parent. Since truncation |
| // behavior depends both on both the parent and the inline block's directionality, we |
| // must keep track of these separately. |
| bool ltr = isLeftToRightDirection(); |
| if (ltr != flowIsLTR) { |
| // Width in pixels of the visible portion of the box, excluding the ellipsis. |
| int visibleBoxWidth = visibleRightEdge - visibleLeftEdge - ellipsisWidth; |
| ellipsisX = ltr ? left() + visibleBoxWidth : right() - visibleBoxWidth; |
| } |
| |
| int offset = offsetForPosition(ellipsisX, false); |
| if (offset == 0) { |
| // No characters should be rendered. Set ourselves to full truncation and place the ellipsis at the min of our start |
| // and the ellipsis edge. |
| m_truncation = cFullTruncation; |
| truncatedWidth += ellipsisWidth; |
| return flowIsLTR ? std::min(ellipsisX, x()) : std::max(ellipsisX, right() - ellipsisWidth); |
| } |
| |
| // Set the truncation index on the text run. |
| m_truncation = offset; |
| |
| // If we got here that means that we were only partially truncated and we need to return the pixel offset at which |
| // to place the ellipsis. |
| float widthOfVisibleText = renderer().width(m_start, offset, textPos(), isFirstLine()); |
| |
| // The ellipsis needs to be placed just after the last visible character. |
| // Where "after" is defined by the flow directionality, not the inline |
| // box directionality. |
| // e.g. In the case of an LTR inline box truncated in an RTL flow then we can |
| // have a situation such as |Hello| -> |...He| |
| truncatedWidth += widthOfVisibleText + ellipsisWidth; |
| if (flowIsLTR) |
| return left() + widthOfVisibleText; |
| else |
| return right() - widthOfVisibleText - ellipsisWidth; |
| } |
| truncatedWidth += logicalWidth(); |
| return -1; |
| } |
| |
| |
| |
| bool InlineTextBox::isLineBreak() const |
| { |
| return renderer().style().preserveNewline() && len() == 1 && (*renderer().text())[start()] == '\n'; |
| } |
| |
| bool InlineTextBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit /* lineTop */, LayoutUnit /*lineBottom*/) |
| { |
| if (!visibleToHitTesting()) |
| return false; |
| |
| if (isLineBreak()) |
| return false; |
| |
| if (m_truncation == cFullTruncation) |
| return false; |
| |
| FloatRect rect(locationIncludingFlipping(), size()); |
| // Make sure truncated text is ignored while hittesting. |
| if (m_truncation != cNoTruncation) { |
| LayoutUnit widthOfVisibleText = renderer().width(m_start, m_truncation, textPos(), isFirstLine()); |
| |
| if (isHorizontal()) |
| renderer().style().isLeftToRightDirection() ? rect.setWidth(widthOfVisibleText) : rect.shiftXEdgeTo(right() - widthOfVisibleText); |
| else |
| rect.setHeight(widthOfVisibleText); |
| } |
| |
| rect.moveBy(accumulatedOffset); |
| |
| if (locationInContainer.intersects(rect)) { |
| renderer().updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - toLayoutSize(accumulatedOffset))); |
| if (!result.addNodeToRectBasedTestResult(renderer().textNode(), request, locationInContainer, rect)) |
| return true; |
| } |
| return false; |
| } |
| |
| FloatSize InlineTextBox::applyShadowToGraphicsContext(GraphicsContext* context, const ShadowData* shadow, const FloatRect& textRect, bool stroked, bool opaque, bool horizontal) |
| { |
| if (!shadow) |
| return FloatSize(); |
| |
| FloatSize extraOffset; |
| int shadowX = horizontal ? shadow->x() : shadow->y(); |
| int shadowY = horizontal ? shadow->y() : -shadow->x(); |
| FloatSize shadowOffset(shadowX, shadowY); |
| int shadowRadius = shadow->radius(); |
| const Color& shadowColor = shadow->color(); |
| |
| if (shadow->next() || stroked || !opaque) { |
| FloatRect shadowRect(textRect); |
| shadowRect.inflate(shadow->paintingExtent()); |
| shadowRect.move(shadowOffset); |
| context->save(); |
| context->clip(shadowRect); |
| |
| extraOffset = FloatSize(0, 2 * textRect.height() + std::max(0.0f, shadowOffset.height()) + shadowRadius); |
| shadowOffset -= extraOffset; |
| } |
| |
| context->setShadow(shadowOffset, shadowRadius, shadowColor, context->fillColorSpace()); |
| return extraOffset; |
| } |
| |
| static inline bool emphasisPositionHasNeitherLeftNorRight(TextEmphasisPosition emphasisPosition) |
| { |
| return !(emphasisPosition & TextEmphasisPositionLeft) && !(emphasisPosition & TextEmphasisPositionRight); |
| } |
| |
| bool InlineTextBox::emphasisMarkExistsAndIsAbove(const RenderStyle& style, bool& above) const |
| { |
| // This function returns true if there are text emphasis marks and they are suppressed by ruby text. |
| if (style.textEmphasisMark() == TextEmphasisMarkNone) |
| return false; |
| |
| TextEmphasisPosition emphasisPosition = style.textEmphasisPosition(); |
| ASSERT(!((emphasisPosition & TextEmphasisPositionOver) && (emphasisPosition & TextEmphasisPositionUnder))); |
| ASSERT(!((emphasisPosition & TextEmphasisPositionLeft) && (emphasisPosition & TextEmphasisPositionRight))); |
| |
| if (emphasisPositionHasNeitherLeftNorRight(emphasisPosition)) |
| above = emphasisPosition & TextEmphasisPositionOver; |
| else if (style.isHorizontalWritingMode()) |
| above = emphasisPosition & TextEmphasisPositionOver; |
| else |
| above = emphasisPosition & TextEmphasisPositionRight; |
| |
| if ((style.isHorizontalWritingMode() && (emphasisPosition & TextEmphasisPositionUnder)) |
| || (!style.isHorizontalWritingMode() && (emphasisPosition & TextEmphasisPositionLeft))) |
| return true; // Ruby text is always over, so it cannot suppress emphasis marks under. |
| |
| RenderBlock* containingBlock = renderer().containingBlock(); |
| if (!containingBlock->isRubyBase()) |
| return true; // This text is not inside a ruby base, so it does not have ruby text over it. |
| |
| if (!containingBlock->parent()->isRubyRun()) |
| return true; // Cannot get the ruby text. |
| |
| RenderRubyText* rubyText = toRenderRubyRun(containingBlock->parent())->rubyText(); |
| |
| // The emphasis marks over are suppressed only if there is a ruby text box and it not empty. |
| return !rubyText || !rubyText->hasLines(); |
| } |
| |
| 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); |
| |
| LayoutUnit logicalLeftSide = logicalLeftVisualOverflow(); |
| LayoutUnit logicalRightSide = logicalRightVisualOverflow(); |
| LayoutUnit logicalStart = logicalLeftSide + (isHorizontal() ? paintOffset.x() : paintOffset.y()); |
| LayoutUnit logicalExtent = logicalRightSide - logicalLeftSide; |
| |
| LayoutUnit paintEnd = isHorizontal() ? paintInfo.rect.maxX() : paintInfo.rect.maxY(); |
| LayoutUnit paintStart = isHorizontal() ? paintInfo.rect.x() : paintInfo.rect.y(); |
| |
| LayoutPoint adjustedPaintOffset = 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(), isFirstLine()); |
| LayoutUnit widthOfHiddenText = m_logicalWidth - widthOfVisibleText; |
| LayoutSize truncationOffset(isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText, 0); |
| adjustedPaintOffset.move(isHorizontal() ? truncationOffset : truncationOffset.transposedSize()); |
| } |
| } |
| |
| GraphicsContext* context = paintInfo.context; |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| |
| adjustedPaintOffset.move(0, lineStyle.isHorizontalWritingMode() ? 0 : -logicalHeight()); |
| |
| FloatPoint boxOrigin = locationIncludingFlipping(); |
| boxOrigin.move(adjustedPaintOffset.x(), adjustedPaintOffset.y()); |
| FloatRect boxRect(boxOrigin, FloatSize(logicalWidth(), logicalHeight())); |
| |
| RenderCombineText* combinedText = lineStyle.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().textNode() && renderer().frame().editor().compositionNode() == renderer().textNode(); |
| bool useCustomUnderlines = containsComposition && renderer().frame().editor().compositionUsesCustomUnderlines(); |
| |
| // Determine the text colors and selection colors. |
| TextPaintStyle textPaintStyle = computeTextPaintStyle(renderer(), lineStyle, paintInfo); |
| |
| bool paintSelectedTextOnly; |
| bool paintSelectedTextSeparately; |
| const ShadowData* selectionShadow; |
| TextPaintStyle selectionPaintStyle = computeTextSelectionPaintStyle(textPaintStyle, renderer(), lineStyle, paintInfo, paintSelectedTextOnly, paintSelectedTextSeparately, selectionShadow); |
| |
| // Set our font. |
| const Font& font = fontToUse(lineStyle, renderer()); |
| |
| 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 underlines. |
| if (paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseTextClip && !isPrinting) { |
| #if PLATFORM(MAC) |
| // Custom highlighters go behind everything else. |
| if (lineStyle.highlight() != nullAtom && !context->paintingDisabled()) |
| paintCustomHighlight(adjustedPaintOffset, lineStyle.highlight()); |
| #endif |
| |
| if (containsComposition && !useCustomUnderlines) |
| paintCompositionBackground(context, boxOrigin, lineStyle, font, |
| renderer().frame().editor().compositionStart(), |
| renderer().frame().editor().compositionEnd()); |
| |
| paintDocumentMarkers(context, boxOrigin, lineStyle, font, true); |
| |
| if (haveSelection && !useCustomUnderlines) |
| paintSelection(context, boxOrigin, lineStyle, font, selectionPaintStyle.fillColor); |
| } |
| |
| if (Page* page = renderer().frame().page()) { |
| // FIXME: Right now, InlineTextBoxes never call addRelevantUnpaintedObject() even though they might |
| // legitimately be unpainted if they are waiting on a slow-loading web font. We should fix that, and |
| // when we do, we will have to account for the fact the InlineTextBoxes do not always have unique |
| // renderers and Page currently relies on each unpainted object having a unique renderer. |
| if (paintInfo.phase == PaintPhaseForeground) |
| page->addRelevantRepaintedObject(&renderer(), IntRect(boxOrigin.x(), boxOrigin.y(), logicalWidth(), logicalHeight())); |
| } |
| |
| // 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only). |
| int length = m_len; |
| int maximumLength; |
| String string; |
| if (!combinedText) { |
| string = renderer().text(); |
| if (static_cast<unsigned>(length) != string.length() || m_start) { |
| ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(m_start + length) <= string.length()); |
| string = string.substringSharingImpl(m_start, length); |
| } |
| maximumLength = renderer().textLength() - m_start; |
| } else { |
| combinedText->getStringToRender(m_start, string, length); |
| maximumLength = length; |
| } |
| |
| BufferForAppendingHyphen charactersWithHyphen; |
| TextRun textRun = constructTextRun(lineStyle, font, string, maximumLength, hasHyphen() ? &charactersWithHyphen : 0); |
| if (hasHyphen()) |
| length = textRun.length(); |
| |
| int sPos = 0; |
| int ePos = 0; |
| if (haveSelection && (paintSelectedTextOnly || paintSelectedTextSeparately)) |
| selectionStartEnd(sPos, ePos); |
| |
| if (m_truncation != cNoTruncation) { |
| sPos = std::min<int>(sPos, m_truncation); |
| ePos = std::min<int>(ePos, m_truncation); |
| length = m_truncation; |
| } |
| |
| int emphasisMarkOffset = 0; |
| bool emphasisMarkAbove; |
| bool hasTextEmphasis = emphasisMarkExistsAndIsAbove(lineStyle, emphasisMarkAbove); |
| const AtomicString& emphasisMark = hasTextEmphasis ? lineStyle.textEmphasisMarkString() : nullAtom; |
| if (!emphasisMark.isEmpty()) |
| emphasisMarkOffset = emphasisMarkAbove ? -font.fontMetrics().ascent() - font.emphasisMarkDescent(emphasisMark) : font.fontMetrics().descent() + font.emphasisMarkAscent(emphasisMark); |
| |
| const ShadowData* textShadow = paintInfo.forceBlackText() ? 0 : lineStyle.textShadow(); |
| |
| TextPainter textPainter(*context, paintSelectedTextOnly, paintSelectedTextSeparately, font, sPos, ePos, length, emphasisMark, combinedText, textRun, boxRect, textOrigin, emphasisMarkOffset, textShadow, selectionShadow, isHorizontal(), textPaintStyle, selectionPaintStyle); |
| textPainter.paintText(); |
| |
| // Paint decorations |
| TextDecoration textDecorations = lineStyle.textDecorationsInEffect(); |
| if (textDecorations != TextDecorationNone && paintInfo.phase != PaintPhaseSelection) { |
| updateGraphicsContext(*context, textPaintStyle); |
| if (combinedText) |
| context->concatCTM(rotation(boxRect, Clockwise)); |
| paintDecoration(*context, boxOrigin, textDecorations, lineStyle.textDecorationStyle(), textShadow, textPainter); |
| if (combinedText) |
| context->concatCTM(rotation(boxRect, Counterclockwise)); |
| } |
| |
| if (paintInfo.phase == PaintPhaseForeground) { |
| paintDocumentMarkers(context, boxOrigin, lineStyle, font, false); |
| |
| if (useCustomUnderlines) { |
| const Vector<CompositionUnderline>& underlines = renderer().frame().editor().customCompositionUnderlines(); |
| size_t numUnderlines = underlines.size(); |
| |
| for (size_t index = 0; index < numUnderlines; ++index) { |
| const CompositionUnderline& underline = underlines[index]; |
| |
| if (underline.endOffset <= start()) |
| // underline is completely before this run. This might be an underline that sits |
| // before the first run we draw, or underlines that were within runs we skipped |
| // due to truncation. |
| continue; |
| |
| if (underline.startOffset <= end()) { |
| // underline intersects this run. Paint it. |
| paintCompositionUnderline(context, boxOrigin, underline); |
| if (underline.endOffset > end() + 1) |
| // underline also runs into the next run. Bail now, no more marker advancement. |
| break; |
| } else |
| // underline is completely after this run, bail. A later run will paint it. |
| break; |
| } |
| } |
| } |
| |
| if (shouldRotate) |
| context->concatCTM(rotation(boxRect, Counterclockwise)); |
| } |
| |
| void InlineTextBox::selectionStartEnd(int& sPos, int& ePos) |
| { |
| int startPos, endPos; |
| if (renderer().selectionState() == RenderObject::SelectionInside) { |
| startPos = 0; |
| endPos = renderer().textLength(); |
| } else { |
| renderer().selectionStartEnd(startPos, endPos); |
| if (renderer().selectionState() == RenderObject::SelectionStart) |
| endPos = renderer().textLength(); |
| else if (renderer().selectionState() == RenderObject::SelectionEnd) |
| startPos = 0; |
| } |
| |
| sPos = std::max(startPos - m_start, 0); |
| ePos = std::min(endPos - m_start, (int)m_len); |
| } |
| |
| void alignSelectionRectToDevicePixels(FloatRect& rect) |
| { |
| float maxX = floorf(rect.maxX()); |
| rect.setX(floorf(rect.x())); |
| rect.setWidth(roundf(maxX - rect.x())); |
| } |
| |
| void InlineTextBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, const RenderStyle& style, const Font& font, Color textColor) |
| { |
| #if ENABLE(TEXT_SELECTION) |
| if (context->paintingDisabled()) |
| return; |
| |
| // 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.isValid() || c.alpha() == 0) |
| 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()); |
| |
| GraphicsContextStateSaver stateSaver(*context); |
| updateGraphicsContext(*context, TextPaintStyle(c, style.colorSpace())); // Don't draw text at all! |
| |
| // 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; |
| String string = renderer().text(); |
| |
| if (string.length() != static_cast<unsigned>(length) || m_start) { |
| ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(m_start + length) <= string.length()); |
| string = string.substringSharingImpl(m_start, length); |
| } |
| |
| BufferForAppendingHyphen charactersWithHyphen; |
| bool respectHyphen = ePos == length && hasHyphen(); |
| TextRun textRun = constructTextRun(style, font, string, renderer().textLength() - m_start, respectHyphen ? &charactersWithHyphen : 0); |
| if (respectHyphen) |
| ePos = textRun.length(); |
| |
| const RootInlineBox& rootBox = root(); |
| LayoutUnit selectionBottom = rootBox.selectionBottom(); |
| LayoutUnit selectionTop = rootBox.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)); |
| alignSelectionRectToDevicePixels(clipRect); |
| |
| context->clip(clipRect); |
| |
| context->drawHighlightForText(font, textRun, localOrigin, selHeight, c, style.colorSpace(), sPos, ePos); |
| #else |
| UNUSED_PARAM(context); |
| UNUSED_PARAM(boxOrigin); |
| UNUSED_PARAM(style); |
| UNUSED_PARAM(font); |
| UNUSED_PARAM(textColor); |
| #endif |
| } |
| |
| void InlineTextBox::paintCompositionBackground(GraphicsContext* context, const FloatPoint& boxOrigin, const RenderStyle& style, const Font& font, int startPos, int endPos) |
| { |
| int offset = m_start; |
| int sPos = std::max(startPos - offset, 0); |
| int ePos = std::min(endPos - offset, (int)m_len); |
| |
| if (sPos >= ePos) |
| return; |
| |
| GraphicsContextStateSaver stateSaver(*context); |
| |
| #if !PLATFORM(IOS) |
| // FIXME: Is this color still applicable as of Mavericks? for non-Mac ports? We should |
| // be able to move this color information to RenderStyle. |
| Color c = Color(225, 221, 85); |
| #else |
| Color c = style.compositionFillColor(); |
| #endif |
| |
| updateGraphicsContext(*context, TextPaintStyle(c, style.colorSpace())); // Don't draw text at all! |
| |
| 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, c, style.colorSpace(), sPos, ePos); |
| } |
| |
| #if PLATFORM(MAC) |
| |
| void InlineTextBox::paintCustomHighlight(const LayoutPoint& paintOffset, const AtomicString& type) |
| { |
| Page* page = renderer().frame().page(); |
| if (!page) |
| return; |
| |
| const RootInlineBox& rootBox = root(); |
| FloatRect rootRect(paintOffset.x() + rootBox.x(), paintOffset.y() + selectionTop(), rootBox.logicalWidth(), selectionHeight()); |
| FloatRect textRect(paintOffset.x() + x(), rootRect.y(), logicalWidth(), rootRect.height()); |
| |
| page->chrome().client().paintCustomHighlight(renderer().textNode(), type, textRect, rootRect, true, false); |
| } |
| |
| #endif |
| |
| static StrokeStyle textDecorationStyleToStrokeStyle(TextDecorationStyle decorationStyle) |
| { |
| StrokeStyle strokeStyle = SolidStroke; |
| switch (decorationStyle) { |
| case TextDecorationStyleSolid: |
| strokeStyle = SolidStroke; |
| break; |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| case TextDecorationStyleDouble: |
| strokeStyle = DoubleStroke; |
| break; |
| case TextDecorationStyleDotted: |
| strokeStyle = DottedStroke; |
| break; |
| case TextDecorationStyleDashed: |
| strokeStyle = DashedStroke; |
| break; |
| case TextDecorationStyleWavy: |
| strokeStyle = WavyStroke; |
| break; |
| #endif // CSS3_TEXT_DECORATION |
| } |
| |
| return strokeStyle; |
| } |
| |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| static int computeUnderlineOffset(const TextUnderlinePosition underlinePosition, const FontMetrics& fontMetrics, const InlineTextBox* inlineTextBox, const int 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. |
| const int gap = std::max<int>(1, ceilf(textDecorationThickness / 2.0)); |
| |
| // According to the specification TextUnderlinePositionAuto should default to 'alphabetic' for horizontal text |
| // and to 'under Left' for vertical text (e.g. japanese). We support only horizontal text for now. |
| switch (underlinePosition) { |
| case TextUnderlinePositionAlphabetic: |
| 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(); |
| return inlineTextBox->logicalHeight() + gap + std::max<float>(offset, 0); |
| } |
| } |
| |
| 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; |
| } |
| |
| static void getWavyStrokeParameters(float strokeThickness, float& controlPointDistance, float& step) |
| { |
| // 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. |
| 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. |
| step = 2 * std::max<float>(2, strokeThickness); |
| } |
| |
| /* |
| * 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); |
| |
| float controlPointDistance; |
| float step; |
| getWavyStrokeParameters(strokeThickness, controlPointDistance, step); |
| |
| 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); |
| } |
| |
| // Because finding the bounding box of an underline is structurally similar to finding |
| // the bounding box of a strikethrough, we can pull out the computation and parameterize |
| // by the location of the decoration (yOffset, underlineOffset, and doubleOffset). |
| static FloatRect boundingBoxForSingleDecoration(GraphicsContext& context, float textDecorationThickness, |
| float width, FloatPoint localOrigin, TextDecorationStyle decorationStyle, |
| bool isPrinting, float yOffset, float underlineOffset, float doubleOffset) |
| { |
| FloatRect boundingBox; |
| |
| switch (decorationStyle) { |
| case TextDecorationStyleWavy: { |
| FloatPoint start(localOrigin.x(), localOrigin.y() + yOffset); |
| FloatPoint end = start + FloatSize(width, 0); |
| context.adjustLineToPixelBoundaries(start, end, textDecorationThickness, context.strokeStyle()); |
| |
| float controlPointDistance; |
| float step; |
| getWavyStrokeParameters(textDecorationThickness, controlPointDistance, step); |
| |
| adjustStepToDecorationLength(step, controlPointDistance, width); |
| |
| controlPointDistance += textDecorationThickness; |
| FloatPoint boundingBoxOrigin = start - FloatSize(0, controlPointDistance); |
| FloatSize boundingBoxSize = FloatSize(width, 2 * controlPointDistance); |
| boundingBox = FloatRect(boundingBoxOrigin, boundingBoxSize); |
| break; |
| } |
| default: |
| boundingBox = context.computeLineBoundsForText(localOrigin + FloatSize(0, underlineOffset), width, isPrinting); |
| if (decorationStyle == TextDecorationStyleDouble) |
| boundingBox.unite(context.computeLineBoundsForText(localOrigin + FloatSize(0, doubleOffset), width, isPrinting)); |
| } |
| return boundingBox; |
| } |
| |
| static FloatRect boundingBoxForAllActiveDecorations(InlineTextBox& inlineTextBox, GraphicsContext& context, TextDecoration decoration, float textDecorationThickness, float width, float doubleOffset, TextDecorationStyle decorationStyle, const FloatPoint localOrigin, const RenderStyle& lineStyle, bool isPrinting, int baseline) |
| { |
| FloatRect boundingBox; |
| if (decoration & TextDecorationUnderline) { |
| int underlineOffset = computeUnderlineOffset(lineStyle.textUnderlinePosition(), lineStyle.fontMetrics(), &inlineTextBox, textDecorationThickness); |
| |
| boundingBox.unite(boundingBoxForSingleDecoration(context, textDecorationThickness, width, localOrigin, decorationStyle, isPrinting, underlineOffset + doubleOffset, underlineOffset, baseline + 1)); |
| } |
| if (decoration & TextDecorationOverline) |
| boundingBox.unite(boundingBoxForSingleDecoration(context, textDecorationThickness, width, localOrigin, decorationStyle, isPrinting, -doubleOffset, 0, -doubleOffset)); |
| if (decoration & TextDecorationLineThrough) |
| boundingBox.unite(boundingBoxForSingleDecoration(context, textDecorationThickness, width, localOrigin, decorationStyle, isPrinting, 2 * baseline / 3, 2 * baseline / 3, doubleOffset + 2 * baseline / 3)); |
| return boundingBox; |
| } |
| #endif // CSS3_TEXT_DECORATION |
| |
| void InlineTextBox::paintDecoration(GraphicsContext& context, const FloatPoint& boxOrigin, TextDecoration decoration, TextDecorationStyle decorationStyle, const ShadowData* shadow, TextPainter& textPainter) |
| { |
| #if !ENABLE(CSS3_TEXT_DECORATION) |
| UNUSED_PARAM(textPainter); |
| #endif |
| // FIXME: We should improve this rule and not always just assume 1. |
| const float textDecorationThickness = 1.f; |
| |
| if (m_truncation == cFullTruncation) |
| return; |
| |
| FloatPoint localOrigin = boxOrigin; |
| |
| float width = m_logicalWidth; |
| if (m_truncation != cNoTruncation) { |
| width = renderer().width(m_start, m_truncation, textPos(), isFirstLine()); |
| if (!isLeftToRightDirection()) |
| localOrigin.move(m_logicalWidth - width, 0); |
| } |
| |
| // Get the text decoration colors. |
| Color underline, overline, linethrough; |
| renderer().getTextDecorationColors(decoration, underline, overline, linethrough, true); |
| if (isFirstLine()) |
| renderer().getTextDecorationColors(decoration, underline, overline, linethrough, true, true); |
| |
| // Use a special function for underlines to get the positioning exactly right. |
| bool isPrinting = renderer().document().printing(); |
| #if !PLATFORM(IOS) |
| context.setStrokeThickness(textDecorationThickness); |
| #else |
| // On iOS we want to draw crisp decorations. The function drawLineForText takes the context's |
| // strokeThickness and renders that at device pixel scale (i.e. a strokeThickness of 1 will |
| // produce a 1 device pixel line, so thinner on retina than non-retina). We will also scale |
| // our thickness based on the size of the font. Since our default size is 16px we'll use that |
| // as a scale reference. |
| float pageScale = 1; |
| if (Page* page = renderer().frame().page()) |
| pageScale = page->pageScaleFactor(); |
| |
| const float textDecorationBaseFontSize = 16; |
| float fontSizeScaling = renderer().style().fontSize() / textDecorationBaseFontSize; |
| float strokeThickness = roundf(textDecorationThickness * fontSizeScaling * pageScale); |
| context.setStrokeThickness(strokeThickness); |
| #endif |
| |
| bool linesAreOpaque = !isPrinting && (!(decoration & TextDecorationUnderline) || underline.alpha() == 255) && (!(decoration & TextDecorationOverline) || overline.alpha() == 255) && (!(decoration & TextDecorationLineThrough) || linethrough.alpha() == 255); |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| int baseline = lineStyle.fontMetrics().ascent(); |
| |
| bool setClip = false; |
| int extraOffset = 0; |
| if (!linesAreOpaque && shadow && shadow->next()) { |
| FloatRect clipRect(localOrigin, FloatSize(width, baseline + 2)); |
| for (const ShadowData* s = shadow; s; s = s->next()) { |
| int shadowExtent = s->paintingExtent(); |
| FloatRect shadowRect(localOrigin, FloatSize(width, baseline + 2)); |
| shadowRect.inflate(shadowExtent); |
| int shadowX = isHorizontal() ? s->x() : s->y(); |
| int shadowY = isHorizontal() ? s->y() : -s->x(); |
| shadowRect.move(shadowX, shadowY); |
| clipRect.unite(shadowRect); |
| extraOffset = std::max(extraOffset, std::max(0, shadowY) + shadowExtent); |
| } |
| context.save(); |
| context.clip(clipRect); |
| extraOffset += baseline + 2; |
| localOrigin.move(0, extraOffset); |
| setClip = true; |
| } |
| |
| ColorSpace colorSpace = renderer().style().colorSpace(); |
| bool setShadow = false; |
| |
| do { |
| if (shadow) { |
| if (!shadow->next()) { |
| // The last set of lines paints normally inside the clip. |
| localOrigin.move(0, -extraOffset); |
| extraOffset = 0; |
| } |
| int shadowX = isHorizontal() ? shadow->x() : shadow->y(); |
| int shadowY = isHorizontal() ? shadow->y() : -shadow->x(); |
| context.setShadow(FloatSize(shadowX, shadowY - extraOffset), shadow->radius(), shadow->color(), colorSpace); |
| setShadow = true; |
| shadow = shadow->next(); |
| } |
| |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| // Offset between lines - always non-zero, so lines never cross each other. |
| float doubleOffset = textDecorationThickness + 1; |
| |
| bool clipDecorationToMask = false; |
| |
| GraphicsContextStateSaver stateSaver(context, false); |
| |
| if (clipDecorationToMask) { |
| const float skipInkGapWidth = 1; |
| |
| stateSaver.save(); |
| |
| FloatRect underlineRect = boundingBoxForAllActiveDecorations(*this, context, decoration, textDecorationThickness, width, doubleOffset, decorationStyle, localOrigin, lineStyle, isPrinting, baseline); |
| IntRect enclosingDeviceRect = enclosingIntRect(underlineRect); |
| std::unique_ptr<ImageBuffer> imageBuffer = context.createCompatibleBuffer(enclosingDeviceRect.size()); |
| |
| if (imageBuffer.get()) { |
| GraphicsContext& maskContext = *imageBuffer->context(); |
| maskContext.setFillColor(Color::black, ColorSpaceDeviceRGB); |
| maskContext.setLineJoin(RoundJoin); |
| maskContext.translate(FloatPoint() - enclosingDeviceRect.location()); |
| |
| maskContext.fillRect(enclosingDeviceRect); |
| maskContext.setCompositeOperation(CompositeClear); |
| |
| textPainter.paintTextInContext(maskContext, skipInkGapWidth); |
| |
| context.clipToImageBuffer(imageBuffer.get(), enclosingDeviceRect); |
| } |
| } |
| #endif // CSS3_TEXT_DECORATION |
| context.setStrokeStyle(textDecorationStyleToStrokeStyle(decorationStyle)); |
| if (decoration & TextDecorationUnderline) { |
| context.setStrokeColor(underline, colorSpace); |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| TextUnderlinePosition underlinePosition = lineStyle.textUnderlinePosition(); |
| const int underlineOffset = computeUnderlineOffset(underlinePosition, lineStyle.fontMetrics(), this, textDecorationThickness); |
| |
| switch (decorationStyle) { |
| case TextDecorationStyleWavy: { |
| FloatPoint start(localOrigin.x(), localOrigin.y() + underlineOffset + doubleOffset); |
| FloatPoint end(localOrigin.x() + width, localOrigin.y() + underlineOffset + doubleOffset); |
| strokeWavyTextDecoration(context, start, end, textDecorationThickness); |
| break; |
| } |
| default: |
| #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) |
| if (lineStyle.textDecorationSkip() == TextDecorationSkipInk) { |
| if (!context.paintingDisabled()) { |
| drawSkipInkUnderline(textPainter, context, localOrigin, underlineOffset, width, isPrinting); |
| |
| if (decorationStyle == TextDecorationStyleDouble) |
| drawSkipInkUnderline(textPainter, context, localOrigin, underlineOffset + doubleOffset, width, isPrinting); |
| } |
| } else { |
| #endif // CSS3_TEXT_DECORATION_SKIP_INK |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + underlineOffset), width, isPrinting); |
| |
| if (decorationStyle == TextDecorationStyleDouble) |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + underlineOffset + doubleOffset), width, isPrinting); |
| #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) |
| } |
| #endif |
| } |
| #else |
| // Leave one pixel of white between the baseline and the underline. |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + baseline + 1), width, isPrinting); |
| #endif // CSS3_TEXT_DECORATION |
| } |
| if (decoration & TextDecorationOverline) { |
| context.setStrokeColor(overline, colorSpace); |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| switch (decorationStyle) { |
| case TextDecorationStyleWavy: { |
| FloatPoint start(localOrigin.x(), localOrigin.y() - doubleOffset); |
| FloatPoint end(localOrigin.x() + width, localOrigin.y() - doubleOffset); |
| strokeWavyTextDecoration(context, start, end, textDecorationThickness); |
| break; |
| } |
| default: |
| #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) |
| if (lineStyle.textDecorationSkip() == TextDecorationSkipInk) { |
| if (!context.paintingDisabled()) { |
| drawSkipInkUnderline(textPainter, context, localOrigin, 0, width, isPrinting); |
| |
| if (decorationStyle == TextDecorationStyleDouble) |
| drawSkipInkUnderline(textPainter, context, localOrigin, -doubleOffset, width, isPrinting); |
| } |
| } else { |
| #endif // CSS3_TEXT_DECORATION_SKIP_INK |
| #endif // CSS3_TEXT_DECORATION |
| context.drawLineForText(localOrigin, width, isPrinting); |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| if (decorationStyle == TextDecorationStyleDouble) |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() - doubleOffset), width, isPrinting); |
| #if ENABLE(CSS3_TEXT_DECORATION_SKIP_INK) |
| } |
| #endif |
| } |
| #endif // CSS3_TEXT_DECORATION |
| } |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| if (clipDecorationToMask) |
| stateSaver.restore(); |
| #endif |
| if (decoration & TextDecorationLineThrough) { |
| context.setStrokeColor(linethrough, colorSpace); |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| switch (decorationStyle) { |
| case TextDecorationStyleWavy: { |
| FloatPoint start(localOrigin.x(), localOrigin.y() + 2 * baseline / 3); |
| FloatPoint end(localOrigin.x() + width, localOrigin.y() + 2 * baseline / 3); |
| strokeWavyTextDecoration(context, start, end, textDecorationThickness); |
| break; |
| } |
| default: |
| #endif // CSS3_TEXT_DECORATION |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + 2 * baseline / 3), width, isPrinting); |
| #if ENABLE(CSS3_TEXT_DECORATION) |
| if (decorationStyle == TextDecorationStyleDouble) |
| context.drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + doubleOffset + 2 * baseline / 3), width, isPrinting); |
| } |
| #endif // CSS3_TEXT_DECORATION |
| } |
| } while (shadow); |
| |
| if (setClip) |
| context.restore(); |
| else if (setShadow) |
| context.clearShadow(); |
| } |
| |
| static GraphicsContext::DocumentMarkerLineStyle lineStyleForMarkerType(DocumentMarker::MarkerType markerType) |
| { |
| switch (markerType) { |
| case DocumentMarker::Spelling: |
| return GraphicsContext::DocumentMarkerSpellingLineStyle; |
| case DocumentMarker::Grammar: |
| return GraphicsContext::DocumentMarkerGrammarLineStyle; |
| case DocumentMarker::CorrectionIndicator: |
| return GraphicsContext::DocumentMarkerAutocorrectionReplacementLineStyle; |
| case DocumentMarker::DictationAlternatives: |
| return GraphicsContext::DocumentMarkerDictationAlternativesLineStyle; |
| #if PLATFORM(IOS) |
| case DocumentMarker::DictationPhraseWithAlternatives: |
| // FIXME: Rename TextCheckingDictationPhraseWithAlternativesLineStyle and remove the PLATFORM(IOS)-guard. |
| return GraphicsContext::TextCheckingDictationPhraseWithAlternativesLineStyle; |
| #endif |
| default: |
| ASSERT_NOT_REACHED(); |
| return GraphicsContext::DocumentMarkerSpellingLineStyle; |
| } |
| } |
| |
| void InlineTextBox::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, const 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; |
| |
| bool isDictationMarker = marker->type() == DocumentMarker::DictationAlternatives; |
| if (!markerSpansWholeBox || grammar || isDictationMarker) { |
| 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 || isDictationMarker) { |
| 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 = cMisspellingLineThickness; |
| int baseline = lineStyle().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())); |
| } |
| |
| void InlineTextBox::paintTextMatchMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, const 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() ? renderer().theme().platformActiveTextSearchHighlightColor() : renderer().theme().platformInactiveTextSearchHighlightColor(); |
| GraphicsContextStateSaver stateSaver(*pt); |
| updateGraphicsContext(*pt, TextPaintStyle(color, style.colorSpace())); // Don't draw text at all! |
| pt->clip(FloatRect(boxOrigin.x(), boxOrigin.y() - deltaY, m_logicalWidth, selHeight)); |
| pt->drawHighlightForText(font, run, FloatPoint(boxOrigin.x(), boxOrigin.y() - deltaY), selHeight, color, style.colorSpace(), sPos, ePos); |
| } |
| } |
| |
| void InlineTextBox::computeRectForReplacementMarker(DocumentMarker* marker, const RenderStyle& style, const Font& font) |
| { |
| // Replacement markers are not actually drawn, but their rects need to be computed for hit testing. |
| int top = selectionTop(); |
| int h = 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); |
| IntPoint startPoint = IntPoint(x(), top); |
| |
| // Compute and store the rect associated with this marker. |
| IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, startPoint, h, sPos, ePos)); |
| markerRect = renderer().localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox(); |
| toRenderedDocumentMarker(marker)->setRenderedRect(markerRect); |
| } |
| |
| void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint& boxOrigin, const RenderStyle& style, const Font& font, bool background) |
| { |
| if (!renderer().textNode()) |
| return; |
| |
| Vector<DocumentMarker*> markers = renderer().document().markers().markersFor(renderer().textNode()); |
| Vector<DocumentMarker*>::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: |
| case DocumentMarker::CorrectionIndicator: |
| case DocumentMarker::Replacement: |
| case DocumentMarker::DictationAlternatives: |
| #if PLATFORM(IOS) |
| // FIXME: Remove the PLATFORM(IOS)-guard. |
| case DocumentMarker::DictationPhraseWithAlternatives: |
| #endif |
| 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: |
| case DocumentMarker::CorrectionIndicator: |
| case DocumentMarker::DictationAlternatives: |
| paintDocumentMarker(pt, boxOrigin, marker, style, font, false); |
| break; |
| case DocumentMarker::Grammar: |
| paintDocumentMarker(pt, boxOrigin, marker, style, font, true); |
| break; |
| #if PLATFORM(IOS) |
| // FIXME: See <rdar://problem/8933352>. Also, remove the PLATFORM(IOS)-guard. |
| case DocumentMarker::DictationPhraseWithAlternatives: |
| paintDocumentMarker(pt, boxOrigin, marker, style, font, true); |
| break; |
| #endif |
| case DocumentMarker::TextMatch: |
| paintTextMatchMarker(pt, boxOrigin, marker, style, font); |
| break; |
| case DocumentMarker::Replacement: |
| computeRectForReplacementMarker(marker, style, font); |
| break; |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| } |
| } |
| |
| void InlineTextBox::paintCompositionUnderline(GraphicsContext* ctx, const FloatPoint& boxOrigin, const CompositionUnderline& underline) |
| { |
| 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 |
| bool useWholeWidth = true; |
| unsigned paintStart = m_start; |
| unsigned paintEnd = end() + 1; // end points at the last char, not past it |
| if (paintStart <= underline.startOffset) { |
| paintStart = underline.startOffset; |
| useWholeWidth = false; |
| start = renderer().width(m_start, paintStart - m_start, textPos(), isFirstLine()); |
| } |
| if (paintEnd != underline.endOffset) { // end points at the last char, not past it |
| paintEnd = std::min(paintEnd, (unsigned)underline.endOffset); |
| useWholeWidth = false; |
| } |
| if (m_truncation != cNoTruncation) { |
| paintEnd = std::min(paintEnd, (unsigned)m_start + m_truncation); |
| useWholeWidth = false; |
| } |
| if (!useWholeWidth) { |
| width = renderer().width(paintStart, paintEnd - paintStart, textPos() + start, isFirstLine()); |
| } |
| |
| // 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 = lineStyle().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, renderer().style().colorSpace()); |
| ctx->setStrokeThickness(lineThickness); |
| ctx->drawLineForText(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + logicalHeight() - lineThickness), width, renderer().document().printing()); |
| } |
| |
| int InlineTextBox::caretMinOffset() const |
| { |
| return m_start; |
| } |
| |
| int InlineTextBox::caretMaxOffset() const |
| { |
| return m_start + m_len; |
| } |
| |
| float InlineTextBox::textPos() const |
| { |
| // When computing the width of a text run, RenderBlock::computeInlineDirectionPositionsForLine() doesn't include the actual offset |
| // from the containing block edge in its measurement. textPos() should be consistent so the text are rendered in the same width. |
| if (logicalLeft() == 0) |
| return 0; |
| return logicalLeft() - root().logicalLeft(); |
| } |
| |
| int InlineTextBox::offsetForPosition(float lineOffset, bool includePartialGlyphs) const |
| { |
| if (isLineBreak()) |
| return 0; |
| |
| if (lineOffset - logicalLeft() > logicalWidth()) |
| return isLeftToRightDirection() ? len() : 0; |
| if (lineOffset - logicalLeft() < 0) |
| return isLeftToRightDirection() ? 0 : len(); |
| |
| FontCachePurgePreventer fontCachePurgePreventer; |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const Font& font = fontToUse(lineStyle, renderer()); |
| return font.offsetForPosition(constructTextRun(lineStyle, font), lineOffset - logicalLeft(), includePartialGlyphs); |
| } |
| |
| float InlineTextBox::positionForOffset(int offset) const |
| { |
| ASSERT(offset >= m_start); |
| ASSERT(offset <= m_start + m_len); |
| |
| if (isLineBreak()) |
| return logicalLeft(); |
| |
| FontCachePurgePreventer fontCachePurgePreventer; |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const Font& font = fontToUse(lineStyle, renderer()); |
| int from = !isLeftToRightDirection() ? offset - m_start : 0; |
| int to = !isLeftToRightDirection() ? m_len : offset - m_start; |
| // FIXME: Do we need to add rightBearing here? |
| return font.selectionRectForText(constructTextRun(lineStyle, font), IntPoint(logicalLeft(), 0), 0, from, to).maxX(); |
| } |
| |
| TextRun InlineTextBox::constructTextRun(const RenderStyle& style, const Font& font, BufferForAppendingHyphen* charactersWithHyphen) const |
| { |
| ASSERT(renderer().text()); |
| |
| String string = renderer().text(); |
| unsigned startPos = start(); |
| unsigned length = len(); |
| |
| if (string.length() != length || startPos) |
| string = string.substringSharingImpl(startPos, length); |
| |
| return constructTextRun(style, font, string, renderer().textLength() - startPos, charactersWithHyphen); |
| } |
| |
| TextRun InlineTextBox::constructTextRun(const RenderStyle& style, const Font& font, String string, int maximumLength, BufferForAppendingHyphen* charactersWithHyphen) const |
| { |
| int length = string.length(); |
| |
| if (charactersWithHyphen) { |
| adjustCharactersAndLengthForHyphen(*charactersWithHyphen, style, string, length); |
| maximumLength = length; |
| } |
| |
| ASSERT(maximumLength >= length); |
| |
| TextRun run(string, textPos(), expansion(), expansionBehavior(), direction(), dirOverride() || style.rtlOrdering() == VisualOrder, !renderer().canUseSimpleFontCodePath()); |
| run.setTabSize(!style.collapseWhiteSpace(), style.tabSize()); |
| if (font.isSVGFont()) |
| run.setRenderingContext(SVGTextRunRenderingContext::create(renderer())); |
| |
| // Propagate the maximum length of the characters buffer to the TextRun, even when we're only processing a substring. |
| run.setCharactersLength(maximumLength); |
| ASSERT(run.charactersLength() >= run.length()); |
| return run; |
| } |
| |
| #ifndef NDEBUG |
| |
| const char* InlineTextBox::boxName() const |
| { |
| return "InlineTextBox"; |
| } |
| |
| void InlineTextBox::showBox(int printedCharacters) const |
| { |
| String value = renderer().text(); |
| value = value.substring(start(), len()); |
| value.replaceWithLiteral('\\', "\\\\"); |
| value.replaceWithLiteral('\n', "\\n"); |
| printedCharacters += fprintf(stderr, "%s\t%p", boxName(), this); |
| for (; printedCharacters < showTreeCharacterOffset; printedCharacters++) |
| fputc(' ', stderr); |
| printedCharacters = fprintf(stderr, "\t%s %p", renderer().renderName(), &renderer()); |
| const int rendererCharacterOffset = 24; |
| for (; printedCharacters < rendererCharacterOffset; printedCharacters++) |
| fputc(' ', stderr); |
| fprintf(stderr, "(%d,%d) \"%s\"\n", start(), start() + len(), value.utf8().data()); |
| } |
| |
| #endif |
| |
| } // namespace WebCore |
