/
InlineTextBox.cpp
1149 lines (966 loc) · 49.8 KB
/
InlineTextBox.cpp
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/*
* (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 "RenderBlock.h"
#include "RenderCombineText.h"
#include "RenderLineBreak.h"
#include "RenderRubyRun.h"
#include "RenderRubyText.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "RenderedDocumentMarker.h"
#include "Text.h"
#include "TextDecorationPainter.h"
#include "TextPaintStyle.h"
#include "TextPainter.h"
#include <stdio.h>
#include <wtf/text/CString.h>
#include <wtf/text/TextStream.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.addNodeToListBasedTestResult(renderer().textNode(), request, locationInContainer, rect) == HitTestProgress::Stop)
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.setStyle(textPaintStyle);
textPainter.setSelectionStyle(selectionPaintStyle);
textPainter.setIsHorizontal(isHorizontal());
textPainter.setShadow(textShadow);
textPainter.setSelectionShadow(selectionShadow);
textPainter.setEmphasisMark(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.paintRange(textRun, boxRect, textOrigin, previousEnd, currentStart);
if (currentStart < currentEnd) {
context.save();
context.setAlpha(0.25);
textPainter.paintRange(textRun, boxRect, textOrigin, currentStart, currentEnd);
context.restore();
}
}
if (currentEnd < length)
textPainter.paintRange(textRun, boxRect, textOrigin, currentEnd, length);
} else
textPainter.paint(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)
{
// 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;
if (!markerSpansWholeBox) {
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);
break;
case DocumentMarker::Grammar:
paintDocumentMarker(context, boxOrigin, *marker, style, font);
break;
#if PLATFORM(IOS)
// FIXME: See <rdar://problem/8933352>. Also, remove the PLATFORM(IOS)-guard.
case DocumentMarker::DictationPhraseWithAlternatives:
paintDocumentMarker(context, boxOrigin, *marker, style, font);
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;