| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004-2014 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 "BreakLines.h" |
| #include "DashArray.h" |
| #include "Document.h" |
| #include "DocumentMarkerController.h" |
| #include "Editor.h" |
| #include "EllipsisBox.h" |
| #include "Frame.h" |
| #include "GraphicsContext.h" |
| #include "HitTestResult.h" |
| #include "ImageBuffer.h" |
| #include "InlineTextBoxStyle.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 "Text.h" |
| #include "TextDecorationPainter.h" |
| #include "TextPaintStyle.h" |
| #include "TextPainter.h" |
| #include <stdio.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; |
| |
| 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 downcast<RenderBoxModelObject>(*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 downcast<RenderBoxModelObject>(*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(unsigned startPos, unsigned endPos) const |
| { |
| int sPos = clampedOffset(startPos); |
| int ePos = clampedOffset(endPos); |
| // FIXME: https://bugs.webkit.org/show_bug.cgi?id=160786 |
| // We should only be checking if sPos >= ePos here, because those are the |
| // indices used to actually generate the selection rect. Allowing us past this guard |
| // on any other condition creates zero-width selection rects. |
| return sPos < ePos || (startPos == endPos && startPos >= start() && startPos <= (start() + len())); |
| } |
| |
| RenderObject::SelectionState InlineTextBox::selectionState() |
| { |
| RenderObject::SelectionState state = renderer().selectionState(); |
| if (state == RenderObject::SelectionStart || state == RenderObject::SelectionEnd || state == RenderObject::SelectionBoth) { |
| unsigned startPos, endPos; |
| renderer().selectionStartEnd(startPos, endPos); |
| // The position after a hard line break is considered to be past its end. |
| ASSERT(start() + len() >= (isLineBreak() ? 1 : 0)); |
| unsigned 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) { |
| unsigned selectionStart; |
| unsigned selectionEnd; |
| std::tie(selectionStart, selectionEnd) = selectionStartEnd(); |
| // 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(selectionEnd >= m_truncation && selectionStart <= m_truncation ? |
| RenderObject::SelectionInside : RenderObject::SelectionNone); |
| } else |
| ellipsis->setSelectionState(RenderObject::SelectionNone); |
| } |
| |
| return state; |
| } |
| |
| static const FontCascade& fontToUse(const RenderStyle& style, const RenderText& renderer) |
| { |
| if (style.hasTextCombine() && is<RenderCombineText>(renderer)) { |
| const auto& textCombineRenderer = downcast<RenderCombineText>(renderer); |
| if (textCombineRenderer.isCombined()) |
| return textCombineRenderer.textCombineFont(); |
| } |
| return style.fontCascade(); |
| } |
| |
| LayoutRect InlineTextBox::localSelectionRect(unsigned startPos, unsigned endPos) const |
| { |
| unsigned sPos = clampedOffset(startPos); |
| unsigned ePos = clampedOffset(endPos); |
| |
| // FIXME: https://bugs.webkit.org/show_bug.cgi?id=160786 |
| // We should only be checking if sPos >= ePos here, because those are the |
| // indices used to actually generate the selection rect. Allowing us past this guard |
| // on any other condition creates zero-width selection rects. |
| if (sPos >= ePos && !(startPos == endPos && startPos >= start() && startPos <= (start() + len()))) |
| return LayoutRect(); |
| |
| LayoutUnit selectionTop = this->selectionTop(); |
| LayoutUnit selectionHeight = this->selectionHeight(); |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const FontCascade& font = fontToUse(lineStyle, renderer()); |
| |
| String hyphenatedString; |
| bool respectHyphen = ePos == m_len && hasHyphen(); |
| if (respectHyphen) |
| hyphenatedString = hyphenatedStringForTextRun(lineStyle); |
| TextRun textRun = constructTextRun(lineStyle, hyphenatedString); |
| |
| LayoutRect selectionRect = LayoutRect(LayoutPoint(logicalLeft(), selectionTop), LayoutSize(m_logicalWidth, selectionHeight)); |
| // Avoid computing the font width when the entire line box is selected as an optimization. |
| if (sPos || ePos != m_len) |
| font.adjustSelectionRectForText(textRun, selectionRect, sPos, ePos); |
| IntRect snappedSelectionRect = enclosingIntRect(selectionRect); |
| LayoutUnit logicalWidth = snappedSelectionRect.width(); |
| if (snappedSelectionRect.x() > logicalRight()) |
| logicalWidth = 0; |
| else if (snappedSelectionRect.maxX() > logicalRight()) |
| logicalWidth = logicalRight() - snappedSelectionRect.x(); |
| |
| LayoutPoint topPoint = isHorizontal() ? LayoutPoint(snappedSelectionRect.x(), selectionTop) : LayoutPoint(selectionTop, snappedSelectionRect.x()); |
| LayoutUnit width = isHorizontal() ? logicalWidth : selectionHeight; |
| LayoutUnit height = isHorizontal() ? selectionHeight : 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*/, |
| HitTestAction /*hitTestAction*/) |
| { |
| 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; |
| } |
| |
| 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 (!is<RenderRubyRun>(*containingBlock->parent())) |
| return true; // Cannot get the ruby text. |
| |
| RenderRubyText* rubyText = downcast<RenderRubyRun>(*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(); |
| |
| FloatPoint localPaintOffset(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); |
| localPaintOffset.move(isHorizontal() ? truncationOffset : truncationOffset.transposedSize()); |
| } |
| } |
| |
| GraphicsContext& context = paintInfo.context(); |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| |
| localPaintOffset.move(0, lineStyle.isHorizontalWritingMode() ? 0 : -logicalHeight()); |
| |
| FloatPoint boxOrigin = locationIncludingFlipping(); |
| boxOrigin.moveBy(localPaintOffset); |
| FloatRect boxRect(boxOrigin, FloatSize(logicalWidth(), logicalHeight())); |
| |
| RenderCombineText* combinedText = lineStyle.hasTextCombine() && is<RenderCombineText>(renderer()) && downcast<RenderCombineText>(renderer()).isCombined() ? &downcast<RenderCombineText>(renderer()) : nullptr; |
| |
| 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().frame(), lineStyle, paintInfo); |
| |
| bool paintSelectedTextOnly = false; |
| bool paintSelectedTextSeparately = false; |
| bool paintNonSelectedTextOnly = false; |
| const ShadowData* selectionShadow = nullptr; |
| |
| // Text with custom underlines does not have selection background painted, so selection paint style is not appropriate for it. |
| TextPaintStyle selectionPaintStyle = haveSelection && !useCustomUnderlines ? computeTextSelectionPaintStyle(textPaintStyle, renderer(), lineStyle, paintInfo, paintSelectedTextOnly, paintSelectedTextSeparately, paintNonSelectedTextOnly, selectionShadow) : textPaintStyle; |
| |
| // Set our font. |
| const FontCascade& font = fontToUse(lineStyle, renderer()); |
| // 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 (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); |
| } |
| |
| // 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) |
| renderer().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). |
| String alternateStringToRender; |
| if (combinedText) |
| alternateStringToRender = combinedText->combinedStringForRendering(); |
| else if (hasHyphen()) |
| alternateStringToRender = hyphenatedStringForTextRun(lineStyle); |
| |
| TextRun textRun = constructTextRun(lineStyle, alternateStringToRender); |
| unsigned length = textRun.length(); |
| |
| unsigned selectionStart = 0; |
| unsigned selectionEnd = 0; |
| if (haveSelection && (paintSelectedTextOnly || paintSelectedTextSeparately)) |
| std::tie(selectionStart, selectionEnd) = selectionStartEnd(); |
| |
| if (m_truncation != cNoTruncation) { |
| selectionStart = std::min(selectionStart, static_cast<unsigned>(m_truncation)); |
| selectionEnd = std::min(selectionEnd, static_cast<unsigned>(m_truncation)); |
| length = m_truncation; |
| } |
| |
| float 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.forceTextColor()) ? nullptr : lineStyle.textShadow(); |
| |
| FloatPoint textOrigin(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent()); |
| if (combinedText) { |
| if (auto newOrigin = combinedText->computeTextOrigin(boxRect)) |
| textOrigin = newOrigin.value(); |
| } |
| |
| if (isHorizontal()) |
| textOrigin.setY(roundToDevicePixel(LayoutUnit(textOrigin.y()), renderer().document().deviceScaleFactor())); |
| else |
| textOrigin.setX(roundToDevicePixel(LayoutUnit(textOrigin.x()), renderer().document().deviceScaleFactor())); |
| |
| TextPainter textPainter(context); |
| textPainter.setFont(font); |
| textPainter.setTextPaintStyle(textPaintStyle); |
| textPainter.setSelectionPaintStyle(selectionPaintStyle); |
| textPainter.setIsHorizontal(isHorizontal()); |
| textPainter.addTextShadow(textShadow, selectionShadow); |
| textPainter.addEmphasis(emphasisMark, emphasisMarkOffset, combinedText); |
| |
| auto draggedContentRanges = renderer().draggedContentRangesBetweenOffsets(m_start, m_start + m_len); |
| if (!draggedContentRanges.isEmpty() && !paintSelectedTextOnly && !paintNonSelectedTextOnly) { |
| // FIXME: Painting with text effects ranges currently only works if we're not also painting the selection. |
| // In the future, we may want to support this capability, but in the meantime, this isn't required by anything. |
| unsigned currentEnd = 0; |
| for (size_t index = 0; index < draggedContentRanges.size(); ++index) { |
| unsigned previousEnd = index ? std::min(draggedContentRanges[index - 1].second, length) : 0; |
| unsigned currentStart = draggedContentRanges[index].first - m_start; |
| currentEnd = std::min(draggedContentRanges[index].second - m_start, length); |
| |
| if (previousEnd < currentStart) |
| textPainter.paintTextInRange(textRun, boxRect, textOrigin, previousEnd, currentStart); |
| |
| if (currentStart < currentEnd) { |
| context.save(); |
| context.setAlpha(0.25); |
| textPainter.paintTextInRange(textRun, boxRect, textOrigin, currentStart, currentEnd); |
| context.restore(); |
| } |
| } |
| if (currentEnd < length) |
| textPainter.paintTextInRange(textRun, boxRect, textOrigin, currentEnd, length); |
| } else |
| textPainter.paintText(textRun, length, boxRect, textOrigin, selectionStart, selectionEnd, paintSelectedTextOnly, paintSelectedTextSeparately, paintNonSelectedTextOnly); |
| |
| // Paint decorations |
| TextDecoration textDecorations = lineStyle.textDecorationsInEffect(); |
| if (textDecorations != TextDecorationNone && paintInfo.phase != PaintPhaseSelection) { |
| FloatRect textDecorationSelectionClipOutRect; |
| if ((paintInfo.paintBehavior & PaintBehaviorExcludeSelection) && selectionStart < selectionEnd && selectionEnd <= length) { |
| textDecorationSelectionClipOutRect = logicalOverflowRect(); |
| textDecorationSelectionClipOutRect.moveBy(localPaintOffset); |
| float logicalWidthBeforeRange; |
| float logicalWidthAfterRange; |
| float logicalSelectionWidth = font.widthOfTextRange(textRun, selectionStart, selectionEnd, nullptr, &logicalWidthBeforeRange, &logicalWidthAfterRange); |
| // FIXME: Do we need to handle vertical bottom to top text? |
| if (!isHorizontal()) { |
| textDecorationSelectionClipOutRect.move(0, logicalWidthBeforeRange); |
| textDecorationSelectionClipOutRect.setHeight(logicalSelectionWidth); |
| } else if (direction() == RTL) { |
| textDecorationSelectionClipOutRect.move(logicalWidthAfterRange, 0); |
| textDecorationSelectionClipOutRect.setWidth(logicalSelectionWidth); |
| } else { |
| textDecorationSelectionClipOutRect.move(logicalWidthBeforeRange, 0); |
| textDecorationSelectionClipOutRect.setWidth(logicalSelectionWidth); |
| } |
| } |
| paintDecoration(context, font, combinedText, textRun, textOrigin, boxRect, textDecorations, textPaintStyle, textShadow, textDecorationSelectionClipOutRect); |
| } |
| |
| 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)); |
| } |
| |
| unsigned InlineTextBox::clampedOffset(unsigned x) const |
| { |
| return std::max(std::min(x, start() + len()), start()) - start(); |
| } |
| |
| std::pair<unsigned, unsigned> InlineTextBox::selectionStartEnd() const |
| { |
| auto selectionState = renderer().selectionState(); |
| if (selectionState == RenderObject::SelectionInside) |
| return { 0, m_len }; |
| |
| unsigned start; |
| unsigned end; |
| renderer().selectionStartEnd(start, end); |
| if (selectionState == RenderObject::SelectionStart) |
| end = renderer().textLength(); |
| else if (selectionState == RenderObject::SelectionEnd) |
| start = 0; |
| return { clampedOffset(start), clampedOffset(end) }; |
| } |
| |
| void InlineTextBox::paintSelection(GraphicsContext& context, const FloatPoint& boxOrigin, const RenderStyle& style, const FontCascade& font, const Color& textColor) |
| { |
| #if ENABLE(TEXT_SELECTION) |
| if (context.paintingDisabled()) |
| return; |
| |
| // See if we have a selection to paint at all. |
| unsigned selectionStart; |
| unsigned selectionEnd; |
| std::tie(selectionStart, selectionEnd) = selectionStartEnd(); |
| if (selectionStart >= selectionEnd) |
| 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)); // Don't draw text at all! |
| |
| // If the text is truncated, let the thing being painted in the truncation |
| // draw its own highlight. |
| |
| unsigned length = m_truncation != cNoTruncation ? m_truncation : len(); |
| |
| String hyphenatedString; |
| bool respectHyphen = selectionEnd == length && hasHyphen(); |
| if (respectHyphen) |
| hyphenatedString = hyphenatedStringForTextRun(style, length); |
| TextRun textRun = constructTextRun(style, hyphenatedString, std::optional<unsigned>(length)); |
| if (respectHyphen) |
| selectionEnd = textRun.length(); |
| |
| const RootInlineBox& rootBox = root(); |
| LayoutUnit selectionBottom = rootBox.selectionBottom(); |
| LayoutUnit selectionTop = rootBox.selectionTopAdjustedForPrecedingBlock(); |
| |
| LayoutUnit deltaY = renderer().style().isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - selectionTop; |
| LayoutUnit selectionHeight = std::max<LayoutUnit>(0, selectionBottom - selectionTop); |
| |
| LayoutRect selectionRect = LayoutRect(boxOrigin.x(), boxOrigin.y() - deltaY, m_logicalWidth, selectionHeight); |
| font.adjustSelectionRectForText(textRun, selectionRect, selectionStart, selectionEnd); |
| context.fillRect(snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), textRun.ltr()), c); |
| #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 FontCascade& font, unsigned startPos, unsigned endPos) |
| { |
| unsigned selectionStart = clampedOffset(startPos); |
| unsigned selectionEnd = clampedOffset(endPos); |
| if (selectionStart >= selectionEnd) |
| return; |
| |
| GraphicsContextStateSaver stateSaver(context); |
| Color compositionColor = Color::compositionFill; |
| updateGraphicsContext(context, TextPaintStyle(compositionColor)); // Don't draw text at all! |
| |
| LayoutUnit deltaY = renderer().style().isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); |
| LayoutRect selectionRect = LayoutRect(boxOrigin.x(), boxOrigin.y() - deltaY, 0, selectionHeight()); |
| TextRun textRun = constructTextRun(style); |
| font.adjustSelectionRectForText(textRun, selectionRect, selectionStart, selectionEnd); |
| context.fillRect(snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), textRun.ltr()), compositionColor); |
| } |
| |
| static inline void mirrorRTLSegment(float logicalWidth, TextDirection direction, float& start, float width) |
| { |
| if (direction == LTR) |
| return; |
| start = logicalWidth - width - start; |
| } |
| |
| void InlineTextBox::paintDecoration(GraphicsContext& context, const FontCascade& font, RenderCombineText* combinedText, const TextRun& textRun, const FloatPoint& textOrigin, |
| const FloatRect& boxRect, TextDecoration decoration, TextPaintStyle textPaintStyle, const ShadowData* shadow, const FloatRect& clipOutRect) |
| { |
| if (m_truncation == cFullTruncation) |
| return; |
| |
| updateGraphicsContext(context, textPaintStyle); |
| if (combinedText) |
| context.concatCTM(rotation(boxRect, Clockwise)); |
| |
| float start = 0; |
| float width = m_logicalWidth; |
| if (m_truncation != cNoTruncation) { |
| width = renderer().width(m_start, m_truncation, textPos(), isFirstLine()); |
| mirrorRTLSegment(m_logicalWidth, direction(), start, width); |
| } |
| |
| TextDecorationPainter decorationPainter(context, decoration, renderer(), isFirstLine()); |
| decorationPainter.setInlineTextBox(this); |
| decorationPainter.setFont(font); |
| decorationPainter.setWidth(width); |
| decorationPainter.setBaseline(lineStyle().fontMetrics().ascent()); |
| decorationPainter.setIsHorizontal(isHorizontal()); |
| decorationPainter.addTextShadow(shadow); |
| |
| FloatPoint localOrigin = boxRect.location(); |
| localOrigin.move(start, 0); |
| |
| if (!clipOutRect.isEmpty()) { |
| context.save(); |
| context.clipOut(clipOutRect); |
| } |
| |
| decorationPainter.paintTextDecoration(textRun, textOrigin, localOrigin); |
| |
| if (!clipOutRect.isEmpty()) |
| context.restore(); |
| |
| if (combinedText) |
| context.concatCTM(rotation(boxRect, Counterclockwise)); |
| } |
| |
| 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& context, const FloatPoint& boxOrigin, RenderedDocumentMarker& marker, const RenderStyle& style, const FontCascade& 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 <= 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) { |
| unsigned startPosition = clampedOffset(marker.startOffset()); |
| unsigned endPosition = clampedOffset(marker.endOffset()); |
| |
| if (m_truncation != cNoTruncation) |
| endPosition = std::min(endPosition, static_cast<unsigned>(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); |
| |
| LayoutRect selectionRect = LayoutRect(startPoint, FloatSize(0, selHeight)); |
| font.adjustSelectionRectForText(run, selectionRect, startPosition, endPosition); |
| IntRect markerRect = enclosingIntRect(selectionRect); |
| start = markerRect.x() - startPoint.x(); |
| width = markerRect.width(); |
| } |
| |
| // IMPORTANT: The misspelling underline is not considered when calculating the text bounds, so we have to |
| // make sure to fit within those bounds. This means the top pixel(s) of the underline will overlap the |
| // bottom pixel(s) of the glyphs in smaller font sizes. The alternatives are to increase the line spacing (bad!!) |
| // or decrease the underline thickness. The overlap is actually the most useful, and matches what AppKit does. |
| // So, we generally place the underline at the bottom of the text, but in larger fonts that's not so good so |
| // we pin to two pixels under the baseline. |
| int lineThickness = 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; |
| } |
| context.drawLineForDocumentMarker(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + underlineOffset), width, lineStyleForMarkerType(marker.type())); |
| } |
| |
| void InlineTextBox::paintTextMatchMarker(GraphicsContext& context, const FloatPoint& boxOrigin, RenderedDocumentMarker& marker, const RenderStyle& style, const FontCascade& font) |
| { |
| if (!renderer().frame().editor().markedTextMatchesAreHighlighted()) |
| return; |
| |
| Color color = marker.isActiveMatch() ? renderer().theme().platformActiveTextSearchHighlightColor() : renderer().theme().platformInactiveTextSearchHighlightColor(); |
| GraphicsContextStateSaver stateSaver(context); |
| updateGraphicsContext(context, TextPaintStyle(color)); // Don't draw text at all! |
| |
| // 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. |
| LayoutUnit deltaY = renderer().style().isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop(); |
| LayoutRect selectionRect = LayoutRect(boxOrigin.x(), boxOrigin.y() - deltaY, 0, this->selectionHeight()); |
| |
| unsigned sPos = clampedOffset(marker.startOffset()); |
| unsigned ePos = clampedOffset(marker.endOffset()); |
| TextRun run = constructTextRun(style); |
| font.adjustSelectionRectForText(run, selectionRect, sPos, ePos); |
| |
| if (selectionRect.isEmpty()) |
| return; |
| |
| context.fillRect(snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), run.ltr()), color); |
| } |
| |
| void InlineTextBox::paintDocumentMarkers(GraphicsContext& context, const FloatPoint& boxOrigin, const RenderStyle& style, const FontCascade& font, bool background) |
| { |
| if (!renderer().textNode()) |
| return; |
| |
| Vector<RenderedDocumentMarker*> markers = renderer().document().markers().markersFor(renderer().textNode()); |
| |
| // 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 (auto* marker : markers) { |
| // 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 ENABLE(TELEPHONE_NUMBER_DETECTION) |
| case DocumentMarker::TelephoneNumber: |
| #endif |
| 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(context, boxOrigin, *marker, style, font, false); |
| break; |
| case DocumentMarker::Grammar: |
| paintDocumentMarker(context, boxOrigin, *marker, style, font, true); |
| break; |
| #if PLATFORM(IOS) |
| // FIXME: See <rdar://problem/8933352>. Also, remove the PLATFORM(IOS)-guard. |
| case DocumentMarker::DictationPhraseWithAlternatives: |
| paintDocumentMarker(context, boxOrigin, *marker, style, font, true); |
| break; |
| #endif |
| case DocumentMarker::TextMatch: |
| paintTextMatchMarker(context, boxOrigin, *marker, style, font); |
| break; |
| case DocumentMarker::Replacement: |
| break; |
| #if ENABLE(TELEPHONE_NUMBER_DETECTION) |
| case DocumentMarker::TelephoneNumber: |
| break; |
| #endif |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| } |
| } |
| |
| void InlineTextBox::paintCompositionUnderline(GraphicsContext& context, 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()); |
| mirrorRTLSegment(m_logicalWidth, direction(), start, width); |
| } |
| |
| // 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; |
| |
| context.setStrokeColor(underline.color); |
| context.setStrokeThickness(lineThickness); |
| context.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(); |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const FontCascade& font = fontToUse(lineStyle, renderer()); |
| return font.offsetForPosition(constructTextRun(lineStyle), lineOffset - logicalLeft(), includePartialGlyphs); |
| } |
| |
| float InlineTextBox::positionForOffset(unsigned offset) const |
| { |
| ASSERT(offset >= m_start); |
| ASSERT(offset <= m_start + len()); |
| |
| if (isLineBreak()) |
| return logicalLeft(); |
| |
| const RenderStyle& lineStyle = this->lineStyle(); |
| const FontCascade& font = fontToUse(lineStyle, renderer()); |
| unsigned from = !isLeftToRightDirection() ? clampedOffset(offset) : 0; |
| unsigned to = !isLeftToRightDirection() ? m_len : clampedOffset(offset); |
| // FIXME: Do we need to add rightBearing here? |
| LayoutRect selectionRect = LayoutRect(logicalLeft(), 0, 0, 0); |
| TextRun run = constructTextRun(lineStyle); |
| font.adjustSelectionRectForText(run, selectionRect, from, to); |
| return snapRectToDevicePixelsWithWritingDirection(selectionRect, renderer().document().deviceScaleFactor(), run.ltr()).maxX(); |
| } |
| |
| StringView InlineTextBox::substringToRender(std::optional<unsigned> overridingLength) const |
| { |
| return StringView(renderer().text()).substring(start(), overridingLength.value_or(len())); |
| } |
| |
| String InlineTextBox::hyphenatedStringForTextRun(const RenderStyle& style, std::optional<unsigned> alternateLength) const |
| { |
| ASSERT(hasHyphen()); |
| return makeString(substringToRender(alternateLength), style.hyphenString()); |
| } |
| |
| TextRun InlineTextBox::constructTextRun(const RenderStyle& style, StringView alternateStringToRender, std::optional<unsigned> alternateLength) const |
| { |
| if (alternateStringToRender.isNull()) |
| return constructTextRun(style, substringToRender(alternateLength), renderer().textLength() - start()); |
| return constructTextRun(style, alternateStringToRender, alternateStringToRender.length()); |
| } |
| |
| TextRun InlineTextBox::constructTextRun(const RenderStyle& style, StringView string, unsigned maximumLength) const |
| { |
| ASSERT(maximumLength >= string.length()); |
| |
| TextRun run(string, textPos(), expansion(), expansionBehavior(), direction(), dirOverride() || style.rtlOrdering() == VisualOrder, !renderer().canUseSimpleFontCodePath()); |
| run.setTabSize(!style.collapseWhiteSpace(), style.tabSize()); |
| |
| // 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; |
| } |
| |
| ExpansionBehavior InlineTextBox::expansionBehavior() const |
| { |
| ExpansionBehavior leadingBehavior; |
| if (forceLeadingExpansion()) |
| leadingBehavior = ForceLeadingExpansion; |
| else if (canHaveLeadingExpansion()) |
| leadingBehavior = AllowLeadingExpansion; |
| else |
| leadingBehavior = ForbidLeadingExpansion; |
| |
| ExpansionBehavior trailingBehavior; |
| if (forceTrailingExpansion()) |
| trailingBehavior = ForceTrailingExpansion; |
| else if (expansion() && nextLeafChild() && !nextLeafChild()->isLineBreak()) |
| trailingBehavior = AllowTrailingExpansion; |
| else |
| trailingBehavior = ForbidTrailingExpansion; |
| |
| return leadingBehavior | trailingBehavior; |
| } |
| |
| #if ENABLE(TREE_DEBUGGING) |
| |
| const char* InlineTextBox::boxName() const |
| { |
| return "InlineTextBox"; |
| } |
| |
| void InlineTextBox::showLineBox(bool mark, int depth) const |
| { |
| fprintf(stderr, "-------- %c-", isDirty() ? 'D' : '-'); |
| |
| int printedCharacters = 0; |
| if (mark) { |
| fprintf(stderr, "*"); |
| ++printedCharacters; |
| } |
| while (++printedCharacters <= depth * 2) |
| fputc(' ', stderr); |
| |
| String value = renderer().text(); |
| value = value.substring(start(), len()); |
| value.replaceWithLiteral('\\', "\\\\"); |
| value.replaceWithLiteral('\n', "\\n"); |
| fprintf(stderr, "%s (%.2f, %.2f) (%.2f, %.2f) (%p) renderer->(%p) run(%d, %d) \"%s\"\n", boxName(), x(), y(), width(), height(), this, &renderer(), start(), start() + len(), value.utf8().data()); |
| } |
| |
| #endif |
| |
| } // namespace WebCore |
