/*
* (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 "Document.h"
#include "DocumentMarkerController.h"
#include "Editor.h"
#include "EllipsisBox.h"
#include "Frame.h"
#include "GraphicsContext.h"
#include "HitTestResult.h"
#include "Page.h"
#include "PaintInfo.h"
#include "RenderArena.h"
#include "RenderBlock.h"
#include "RenderCombineText.h"
#include "RenderRubyRun.h"
#include "RenderRubyText.h"
#include "RenderTheme.h"
#include "Text.h"
#include "break_lines.h"
#include <wtf/AlwaysInline.h>
#include <wtf/text/CString.h>
using namespace std;
namespace WebCore {
typedef WTF::HashMap<const InlineTextBox*, IntRect> InlineTextBoxOverflowMap;
static InlineTextBoxOverflowMap* gTextBoxesWithOverflow;
void InlineTextBox::destroy(RenderArena* arena)
{
if (!m_knownToHaveNoOverflow && gTextBoxesWithOverflow)
gTextBoxesWithOverflow->remove(this);
InlineBox::destroy(arena);
}
IntRect InlineTextBox::logicalOverflowRect() const
{
if (m_knownToHaveNoOverflow || !gTextBoxesWithOverflow)
return enclosingIntRect(logicalFrameRect());
return gTextBoxesWithOverflow->get(this);
}
void InlineTextBox::setLogicalOverflowRect(const IntRect& rect)
{
ASSERT(!m_knownToHaveNoOverflow);
if (!gTextBoxesWithOverflow)
gTextBoxesWithOverflow = new InlineTextBoxOverflowMap;
gTextBoxesWithOverflow->add(this, rect);
}
int InlineTextBox::baselinePosition(FontBaseline baselineType) const
{
if (!isText() || !parent())
return 0;
if (parent()->renderer() == renderer()->parent())
return parent()->baselinePosition(baselineType);
return toRenderBoxModelObject(renderer()->parent())->baselinePosition(baselineType, m_firstLine, isHorizontal() ? HorizontalLine : VerticalLine, PositionOnContainingLine);
}
int InlineTextBox::lineHeight() const
{
if (!isText() || !renderer()->parent())
return 0;
if (m_renderer->isBR())
return toRenderBR(m_renderer)->lineHeight(m_firstLine);
if (parent()->renderer() == renderer()->parent())
return parent()->lineHeight();
return toRenderBoxModelObject(renderer()->parent())->lineHeight(m_firstLine, isHorizontal() ? HorizontalLine : VerticalLine, PositionOnContainingLine);
}
int InlineTextBox::selectionTop()
{
return root()->selectionTop();
}
int InlineTextBox::selectionBottom()
{
return root()->selectionBottom();
}
int InlineTextBox::selectionHeight()
{
return root()->selectionHeight();
}
bool InlineTextBox::isSelected(int startPos, int endPos) const
{
int sPos = max(startPos - m_start, 0);
int ePos = min(endPos - m_start, (int)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;
}
typedef Vector<UChar, 256> BufferForAppendingHyphen;
static void adjustCharactersAndLengthForHyphen(BufferForAppendingHyphen& charactersWithHyphen, RenderStyle* style, const UChar*& characters, int& length)
{
const AtomicString& hyphenString = style->hyphenString();
charactersWithHyphen.reserveCapacity(length + hyphenString.length());
charactersWithHyphen.append(characters, length);
charactersWithHyphen.append(hyphenString.characters(), hyphenString.length());
characters = charactersWithHyphen.data();
length += hyphenString.length();
}
IntRect InlineTextBox::selectionRect(int tx, int ty, int startPos, int endPos)
{
int sPos = max(startPos - m_start, 0);
int ePos = min(endPos - m_start, (int)m_len);
if (sPos > ePos)
return IntRect();
RenderText* textObj = textRenderer();
int selTop = selectionTop();
int selHeight = selectionHeight();
RenderStyle* styleToUse = textObj->style(m_firstLine);
const Font& f = styleToUse->font();
const UChar* characters = textObj->text()->characters() + m_start;
int len = m_len;
BufferForAppendingHyphen charactersWithHyphen;
if (ePos == len && hasHyphen()) {
adjustCharactersAndLengthForHyphen(charactersWithHyphen, styleToUse, characters, len);
ePos = len;
}
IntRect r = enclosingIntRect(f.selectionRectForText(TextRun(characters, len, textObj->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride),
IntPoint(), selHeight, sPos, ePos));
int logicalWidth = r.width();
if (r.x() > m_logicalWidth)
logicalWidth = 0;
else if (r.maxX() > m_logicalWidth)
logicalWidth = m_logicalWidth - r.x();
IntPoint topPoint = isHorizontal() ? IntPoint(tx + m_x + r.x(), ty + selTop) : IntPoint(tx + selTop, ty + m_y + r.x());
int width = isHorizontal() ? logicalWidth : selHeight;
int height = isHorizontal() ? selHeight : logicalWidth;
return IntRect(topPoint, IntSize(width, height));
}
void InlineTextBox::deleteLine(RenderArena* arena)
{
toRenderText(renderer())->removeTextBox(this);
destroy(arena);
}
void InlineTextBox::extractLine()
{
if (m_extracted)
return;
toRenderText(renderer())->extractTextBox(this);
}
void InlineTextBox::attachLine()
{
if (!m_extracted)
return;
toRenderText(renderer())->attachTextBox(this);
}
float InlineTextBox::placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, 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 <= m_x;
bool rtlFullTruncation = !flowIsLTR && ellipsisX >= (m_x + m_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 < m_x + m_logicalWidth);
bool rtlEllipsisWithinBox = !flowIsLTR && (ellipsisX > m_x);
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 ? m_x + visibleBoxWidth : m_x + m_logicalWidth - 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;
return min(ellipsisX, m_x);
}
// 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 = toRenderText(renderer())->width(m_start, offset, textPos(), m_firstLine);
// 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|
if (flowIsLTR)
return m_x + widthOfVisibleText;
else
return (m_x + m_logicalWidth) - widthOfVisibleText - ellipsisWidth;
}
return -1;
}
Color correctedTextColor(Color textColor, Color backgroundColor)
{
// Adjust the text color if it is too close to the background color,
// by darkening or lightening it to move it further away.
int d = differenceSquared(textColor, backgroundColor);
// semi-arbitrarily chose 65025 (255^2) value here after a few tests;
if (d > 65025) {
return textColor;
}
int distanceFromWhite = differenceSquared(textColor, Color::white);
int distanceFromBlack = differenceSquared(textColor, Color::black);
if (distanceFromWhite < distanceFromBlack) {
return textColor.dark();
}
return textColor.light();
}
void updateGraphicsContext(GraphicsContext* context, const Color& fillColor, const Color& strokeColor, float strokeThickness, ColorSpace colorSpace)
{
TextDrawingModeFlags mode = context->textDrawingMode();
if (strokeThickness > 0) {
TextDrawingModeFlags newMode = mode | TextModeStroke;
if (mode != newMode) {
context->setTextDrawingMode(newMode);
mode = newMode;
}
}
if (mode & TextModeFill && (fillColor != context->fillColor() || colorSpace != context->fillColorSpace()))
context->setFillColor(fillColor, colorSpace);
if (mode & TextModeStroke) {
if (strokeColor != context->strokeColor())
context->setStrokeColor(strokeColor, colorSpace);
if (strokeThickness != context->strokeThickness())
context->setStrokeThickness(strokeThickness);
}
}
bool InlineTextBox::isLineBreak() const
{
return renderer()->isBR() || (renderer()->style()->preserveNewline() && len() == 1 && (*textRenderer()->text())[start()] == '\n');
}
bool InlineTextBox::nodeAtPoint(const HitTestRequest&, HitTestResult& result, int x, int y, int tx, int ty, int /* lineTop */, int /*lineBottom*/)
{
if (isLineBreak())
return false;
FloatPoint boxOrigin = locationIncludingFlipping();
boxOrigin.move(tx, ty);
FloatRect rect(boxOrigin, IntSize(width(), height()));
if (m_truncation != cFullTruncation && visibleToHitTesting() && rect.intersects(result.rectForPoint(x, y))) {
renderer()->updateHitTestResult(result, flipForWritingMode(IntPoint(x - tx, y - ty)));
if (!result.addNodeToRectBasedTestResult(renderer()->node(), x, y, 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 shadowBlur = shadow->blur();
const Color& shadowColor = shadow->color();
if (shadow->next() || stroked || !opaque) {
FloatRect shadowRect(textRect);
shadowRect.inflate(shadowBlur);
shadowRect.move(shadowOffset);
context->save();
context->clip(shadowRect);
extraOffset = FloatSize(0, 2 * textRect.height() + max(0.0f, shadowOffset.height()) + shadowBlur);
shadowOffset -= extraOffset;
}
context->setShadow(shadowOffset, shadowBlur, shadowColor, context->fillColorSpace());
return extraOffset;
}
static void paintTextWithShadows(GraphicsContext* context, const Font& font, const TextRun& textRun, const AtomicString& emphasisMark, int emphasisMarkOffset, int startOffset, int endOffset, int truncationPoint, const FloatPoint& textOrigin,
const FloatRect& boxRect, const ShadowData* shadow, bool stroked, bool horizontal)
{
Color fillColor = context->fillColor();
ColorSpace fillColorSpace = context->fillColorSpace();
bool opaque = fillColor.alpha() == 255;
if (!opaque)
context->setFillColor(Color::black, fillColorSpace);
do {
IntSize extraOffset;
if (shadow)
extraOffset = roundedIntSize(InlineTextBox::applyShadowToGraphicsContext(context, shadow, boxRect, stroked, opaque, horizontal));
else if (!opaque)
context->setFillColor(fillColor, fillColorSpace);
if (startOffset <= endOffset) {
if (emphasisMark.isEmpty())
context->drawText(font, textRun, textOrigin + extraOffset, startOffset, endOffset);
else
context->drawEmphasisMarks(font, textRun, emphasisMark, textOrigin + extraOffset + IntSize(0, emphasisMarkOffset), startOffset, endOffset);
} else {
if (endOffset > 0) {
if (emphasisMark.isEmpty())
context->drawText(font, textRun, textOrigin + extraOffset, 0, endOffset);
else
context->drawEmphasisMarks(font, textRun, emphasisMark, textOrigin + extraOffset + IntSize(0, emphasisMarkOffset), 0, endOffset);
} if (startOffset < truncationPoint) {
if (emphasisMark.isEmpty())
context->drawText(font, textRun, textOrigin + extraOffset, startOffset, truncationPoint);
else
context->drawEmphasisMarks(font, textRun, emphasisMark, textOrigin + extraOffset + IntSize(0, emphasisMarkOffset), startOffset, truncationPoint);
}
}
if (!shadow)
break;
if (shadow->next() || stroked || !opaque)
context->restore();
else
context->clearShadow();
shadow = shadow->next();
} while (shadow || stroked || !opaque);
}
bool InlineTextBox::getEmphasisMarkPosition(RenderStyle* style, TextEmphasisPosition& emphasisPosition) const
{
// This function returns true if there are text emphasis marks and they are suppressed by ruby text.
if (style->textEmphasisMark() == TextEmphasisMarkNone)
return false;
emphasisPosition = style->textEmphasisPosition();
if (emphasisPosition == TextEmphasisPositionUnder)
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 = static_cast<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->firstLineBox();
}
enum RotationDirection { Counterclockwise, Clockwise };
static inline AffineTransform rotation(const FloatRect& boxRect, RotationDirection clockwise)
{
return clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x())
: AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY());
}
void InlineTextBox::paint(PaintInfo& paintInfo, int tx, int ty, int /*lineTop*/, int /*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);
int logicalLeftSide = logicalLeftVisualOverflow();
int logicalRightSide = logicalRightVisualOverflow();
int logicalStart = logicalLeftSide + (isHorizontal() ? tx : ty);
int logicalExtent = logicalRightSide - logicalLeftSide;
int paintEnd = isHorizontal() ? paintInfo.rect.maxX() : paintInfo.rect.maxY();
int paintStart = isHorizontal() ? paintInfo.rect.x() : paintInfo.rect.y();
if (logicalStart >= paintEnd || logicalStart + logicalExtent <= paintStart)
return;
bool isPrinting = textRenderer()->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|
int widthOfVisibleText = toRenderText(renderer())->width(m_start, m_truncation, textPos(), m_firstLine);
int widthOfHiddenText = m_logicalWidth - widthOfVisibleText;
// FIXME: The hit testing logic also needs to take this translation int account.
if (isHorizontal())
tx += isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText;
else
ty += isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText;
}
}
GraphicsContext* context = paintInfo.context;
RenderStyle* styleToUse = renderer()->style(m_firstLine);
ty -= styleToUse->isHorizontalWritingMode() ? 0 : logicalHeight();
FloatPoint boxOrigin = locationIncludingFlipping();
boxOrigin.move(tx, ty);
FloatRect boxRect(boxOrigin, IntSize(logicalWidth(), logicalHeight()));
RenderCombineText* combinedText = styleToUse->hasTextCombine() && textRenderer()->isCombineText() && toRenderCombineText(textRenderer())->isCombined() ? toRenderCombineText(textRenderer()) : 0;
bool shouldRotate = !isHorizontal() && !combinedText;
if (shouldRotate)
context->concatCTM(rotation(boxRect, Clockwise));
// Determine whether or not we have composition underlines to draw.
bool containsComposition = renderer()->node() && renderer()->frame()->editor()->compositionNode() == renderer()->node();
bool useCustomUnderlines = containsComposition && renderer()->frame()->editor()->compositionUsesCustomUnderlines();
// Set our font.
const Font& font = styleToUse->font();
FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
if (combinedText)
combinedText->adjustTextOrigin(textOrigin, boxRect);
// 1. Paint backgrounds behind text if needed. Examples of such backgrounds include selection
// and composition underlines.
if (paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseTextClip && !isPrinting) {
#if PLATFORM(MAC)
// Custom highlighters go behind everything else.
if (styleToUse->highlight() != nullAtom && !context->paintingDisabled())
paintCustomHighlight(tx, ty, styleToUse->highlight());
#endif
if (containsComposition && !useCustomUnderlines)
paintCompositionBackground(context, boxOrigin, styleToUse, font,
renderer()->frame()->editor()->compositionStart(),
renderer()->frame()->editor()->compositionEnd());
paintDocumentMarkers(context, boxOrigin, styleToUse, font, true);
if (haveSelection && !useCustomUnderlines)
paintSelection(context, boxOrigin, styleToUse, font);
}
// 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only).
Color textFillColor;
Color textStrokeColor;
Color emphasisMarkColor;
float textStrokeWidth = styleToUse->textStrokeWidth();
const ShadowData* textShadow = paintInfo.forceBlackText ? 0 : styleToUse->textShadow();
if (paintInfo.forceBlackText) {
textFillColor = Color::black;
textStrokeColor = Color::black;
emphasisMarkColor = Color::black;
} else {
textFillColor = styleToUse->visitedDependentColor(CSSPropertyWebkitTextFillColor);
// Make the text fill color legible against a white background
if (styleToUse->forceBackgroundsToWhite())
textFillColor = correctedTextColor(textFillColor, Color::white);
textStrokeColor = styleToUse->visitedDependentColor(CSSPropertyWebkitTextStrokeColor);
// Make the text stroke color legible against a white background
if (styleToUse->forceBackgroundsToWhite())
textStrokeColor = correctedTextColor(textStrokeColor, Color::white);
emphasisMarkColor = styleToUse->visitedDependentColor(CSSPropertyWebkitTextEmphasisColor);
// Make the text stroke color legible against a white background
if (styleToUse->forceBackgroundsToWhite())
emphasisMarkColor = correctedTextColor(emphasisMarkColor, Color::white);
}
bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection);
bool paintSelectedTextSeparately = false;
Color selectionFillColor = textFillColor;
Color selectionStrokeColor = textStrokeColor;
Color selectionEmphasisMarkColor = emphasisMarkColor;
float selectionStrokeWidth = textStrokeWidth;
const ShadowData* selectionShadow = textShadow;
if (haveSelection) {
// Check foreground color first.
Color foreground = paintInfo.forceBlackText ? Color::black : renderer()->selectionForegroundColor();
if (foreground.isValid() && foreground != selectionFillColor) {
if (!paintSelectedTextOnly)
paintSelectedTextSeparately = true;
selectionFillColor = foreground;
}
Color emphasisMarkForeground = paintInfo.forceBlackText ? Color::black : renderer()->selectionEmphasisMarkColor();
if (emphasisMarkForeground.isValid() && emphasisMarkForeground != selectionEmphasisMarkColor) {
if (!paintSelectedTextOnly)
paintSelectedTextSeparately = true;
selectionEmphasisMarkColor = emphasisMarkForeground;
}
if (RenderStyle* pseudoStyle = renderer()->getCachedPseudoStyle(SELECTION)) {
const ShadowData* shadow = paintInfo.forceBlackText ? 0 : pseudoStyle->textShadow();
if (shadow != selectionShadow) {
if (!paintSelectedTextOnly)
paintSelectedTextSeparately = true;
selectionShadow = shadow;
}
float strokeWidth = pseudoStyle->textStrokeWidth();
if (strokeWidth != selectionStrokeWidth) {
if (!paintSelectedTextOnly)
paintSelectedTextSeparately = true;
selectionStrokeWidth = strokeWidth;
}
Color stroke = paintInfo.forceBlackText ? Color::black : pseudoStyle->visitedDependentColor(CSSPropertyWebkitTextStrokeColor);
if (stroke != selectionStrokeColor) {
if (!paintSelectedTextOnly)
paintSelectedTextSeparately = true;
selectionStrokeColor = stroke;
}
}
}
int length = m_len;
const UChar* characters;
if (!combinedText)
characters = textRenderer()->text()->characters() + m_start;
else
combinedText->charactersToRender(m_start, characters, length);
BufferForAppendingHyphen charactersWithHyphen;
if (hasHyphen())
adjustCharactersAndLengthForHyphen(charactersWithHyphen, styleToUse, characters, length);
TextRun textRun(characters, length, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride || styleToUse->visuallyOrdered());
int sPos = 0;
int ePos = 0;
if (paintSelectedTextOnly || paintSelectedTextSeparately)
selectionStartEnd(sPos, ePos);
if (m_truncation != cNoTruncation) {
sPos = min<int>(sPos, m_truncation);
ePos = min<int>(ePos, m_truncation);
length = m_truncation;
}
int emphasisMarkOffset = 0;
TextEmphasisPosition emphasisMarkPosition;
bool hasTextEmphasis = getEmphasisMarkPosition(styleToUse, emphasisMarkPosition);
const AtomicString& emphasisMark = hasTextEmphasis ? styleToUse->textEmphasisMarkString() : nullAtom;
if (!emphasisMark.isEmpty())
emphasisMarkOffset = emphasisMarkPosition == TextEmphasisPositionOver ? -font.fontMetrics().ascent() - font.emphasisMarkDescent(emphasisMark) : font.fontMetrics().descent() + font.emphasisMarkAscent(emphasisMark);
if (!paintSelectedTextOnly) {
// For stroked painting, we have to change the text drawing mode. It's probably dangerous to leave that mutated as a side
// effect, so only when we know we're stroking, do a save/restore.
if (textStrokeWidth > 0)
context->save();
updateGraphicsContext(context, textFillColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace());
if (!paintSelectedTextSeparately || ePos <= sPos) {
// FIXME: Truncate right-to-left text correctly.
paintTextWithShadows(context, font, textRun, nullAtom, 0, 0, length, length, textOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal());
} else
paintTextWithShadows(context, font, textRun, nullAtom, 0, ePos, sPos, length, textOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal());
if (!emphasisMark.isEmpty()) {
updateGraphicsContext(context, emphasisMarkColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace());
static TextRun objectReplacementCharacterTextRun(&objectReplacementCharacter, 1);
TextRun& emphasisMarkTextRun = combinedText ? objectReplacementCharacterTextRun : textRun;
FloatPoint emphasisMarkTextOrigin = combinedText ? FloatPoint(boxOrigin.x() + boxRect.width() / 2, boxOrigin.y() + font.fontMetrics().ascent()) : textOrigin;
if (combinedText)
context->concatCTM(rotation(boxRect, Clockwise));
if (!paintSelectedTextSeparately || ePos <= sPos) {
// FIXME: Truncate right-to-left text correctly.
paintTextWithShadows(context, combinedText ? combinedText->originalFont() : font, emphasisMarkTextRun, emphasisMark, emphasisMarkOffset, 0, length, length, emphasisMarkTextOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal());
} else
paintTextWithShadows(context, combinedText ? combinedText->originalFont() : font, emphasisMarkTextRun, emphasisMark, emphasisMarkOffset, ePos, sPos, length, emphasisMarkTextOrigin, boxRect, textShadow, textStrokeWidth > 0, isHorizontal());
if (combinedText)
context->concatCTM(rotation(boxRect, Counterclockwise));
}
if (textStrokeWidth > 0)
context->restore();
}
if ((paintSelectedTextOnly || paintSelectedTextSeparately) && sPos < ePos) {
// paint only the text that is selected
if (selectionStrokeWidth > 0)
context->save();
updateGraphicsContext(context, selectionFillColor, selectionStrokeColor, selectionStrokeWidth, styleToUse->colorSpace());
paintTextWithShadows(context, font, textRun, nullAtom, 0, sPos, ePos, length, textOrigin, boxRect, selectionShadow, selectionStrokeWidth > 0, isHorizontal());
if (!emphasisMark.isEmpty()) {
updateGraphicsContext(context, selectionEmphasisMarkColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace());
static TextRun objectReplacementCharacterTextRun(&objectReplacementCharacter, 1);
TextRun& emphasisMarkTextRun = combinedText ? objectReplacementCharacterTextRun : textRun;
FloatPoint emphasisMarkTextOrigin = combinedText ? FloatPoint(boxOrigin.x() + boxRect.width() / 2, boxOrigin.y() + font.fontMetrics().ascent()) : textOrigin;
if (combinedText)
context->concatCTM(rotation(boxRect, Clockwise));
paintTextWithShadows(context, combinedText ? combinedText->originalFont() : font, emphasisMarkTextRun, emphasisMark, emphasisMarkOffset, sPos, ePos, length, emphasisMarkTextOrigin, boxRect, selectionShadow, selectionStrokeWidth > 0, isHorizontal());
if (combinedText)
context->concatCTM(rotation(boxRect, Counterclockwise));
}
if (selectionStrokeWidth > 0)
context->restore();
}
// Paint decorations
int textDecorations = styleToUse->textDecorationsInEffect();
if (textDecorations != TDNONE && paintInfo.phase != PaintPhaseSelection) {
updateGraphicsContext(context, textFillColor, textStrokeColor, textStrokeWidth, styleToUse->colorSpace());
paintDecoration(context, boxOrigin, textDecorations, textShadow);
}
if (paintInfo.phase == PaintPhaseForeground) {
paintDocumentMarkers(context, boxOrigin, styleToUse, 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 = textRenderer()->textLength();
} else {
textRenderer()->selectionStartEnd(startPos, endPos);
if (renderer()->selectionState() == RenderObject::SelectionStart)
endPos = textRenderer()->textLength();
else if (renderer()->selectionState() == RenderObject::SelectionEnd)
startPos = 0;
}
sPos = max(startPos - m_start, 0);
ePos = min(endPos - m_start, (int)m_len);
}
void InlineTextBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font)
{
// See if we have a selection to paint at all.
int sPos, ePos;
selectionStartEnd(sPos, ePos);
if (sPos >= ePos)
return;
Color textColor = style->visitedDependentColor(CSSPropertyColor);
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. This should basically never happen, since the selection has transparency.
if (textColor == c)
c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue());
context->save();
updateGraphicsContext(context, c, c, 0, 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;
const UChar* characters = textRenderer()->text()->characters() + m_start;
BufferForAppendingHyphen charactersWithHyphen;
if (ePos == length && hasHyphen()) {
adjustCharactersAndLengthForHyphen(charactersWithHyphen, style, characters, length);
ePos = length;
}
int deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
int selHeight = selectionHeight();
FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
context->clip(FloatRect(localOrigin, FloatSize(m_logicalWidth, selHeight)));
context->drawHighlightForText(font, TextRun(characters, length, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(),
!isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()),
localOrigin, selHeight, c, style->colorSpace(), sPos, ePos);
context->restore();
}
void InlineTextBox::paintCompositionBackground(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, int startPos, int endPos)
{
int offset = m_start;
int sPos = max(startPos - offset, 0);
int ePos = min(endPos - offset, (int)m_len);
if (sPos >= ePos)
return;
context->save();
Color c = Color(225, 221, 85);
updateGraphicsContext(context, c, c, 0, 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, TextRun(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(),
!isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()),
localOrigin, selHeight, c, style->colorSpace(), sPos, ePos);
context->restore();
}
#if PLATFORM(MAC)
void InlineTextBox::paintCustomHighlight(int tx, int ty, const AtomicString& type)
{
Frame* frame = renderer()->frame();
if (!frame)
return;
Page* page = frame->page();
if (!page)
return;
RootInlineBox* r = root();
FloatRect rootRect(tx + r->x(), ty + selectionTop(), r->logicalWidth(), selectionHeight());
FloatRect textRect(tx + x(), rootRect.y(), logicalWidth(), rootRect.height());
page->chrome()->client()->paintCustomHighlight(renderer()->node(), type, textRect, rootRect, true, false);
}
#endif
void InlineTextBox::paintDecoration(GraphicsContext* context, const FloatPoint& boxOrigin, int deco, const ShadowData* shadow)
{
if (m_truncation == cFullTruncation)
return;
FloatPoint localOrigin = boxOrigin;
float width = m_logicalWidth;
if (m_truncation != cNoTruncation) {
width = toRenderText(renderer())->width(m_start, m_truncation, textPos(), m_firstLine);
if (!isLeftToRightDirection())
localOrigin.move(m_logicalWidth - width, 0);
}
// Get the text decoration colors.
Color underline, overline, linethrough;
renderer()->getTextDecorationColors(deco, underline, overline, linethrough, true);
// Use a special function for underlines to get the positioning exactly right.
bool isPrinting = textRenderer()->document()->printing();
context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1.
bool linesAreOpaque = !isPrinting && (!(deco & UNDERLINE) || underline.alpha() == 255) && (!(deco & OVERLINE) || overline.alpha() == 255) && (!(deco & LINE_THROUGH) || linethrough.alpha() == 255);
RenderStyle* styleToUse = renderer()->style(m_firstLine);
int baseline = styleToUse->fontMetrics().ascent();
bool setClip = false;
int extraOffset = 0;
if (!linesAreOpaque && shadow && shadow->next()) {
context->save();
FloatRect clipRect(localOrigin, FloatSize(width, baseline + 2));
for (const ShadowData* s = shadow; s; s = s->next()) {
FloatRect shadowRect(localOrigin, FloatSize(width, baseline + 2));
shadowRect.inflate(s->blur());
int shadowX = isHorizontal() ? s->x() : s->y();
int shadowY = isHorizontal() ? s->y() : -s->x();
shadowRect.move(shadowX, shadowY);
clipRect.unite(shadowRect);
extraOffset = max(extraOffset, max(0, shadowY) + s->blur());
}
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->blur(), shadow->color(), colorSpace);
setShadow = true;
shadow = shadow->next();
}
if (deco & UNDERLINE) {
context->setStrokeColor(underline, colorSpace);
context->setStrokeStyle(SolidStroke);
// Leave one pixel of white between the baseline and the underline.
context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + baseline + 1), width, isPrinting);
}
if (deco & OVERLINE) {
context->setStrokeColor(overline, colorSpace);
context->setStrokeStyle(SolidStroke);
context->drawLineForText(localOrigin, width, isPrinting);
}
if (deco & LINE_THROUGH) {
context->setStrokeColor(linethrough, colorSpace);
context->setStrokeStyle(SolidStroke);
context->drawLineForText(FloatPoint(localOrigin.x(), localOrigin.y() + 2 * baseline / 3), width, isPrinting);
}
} while (shadow);
if (setClip)
context->restore();
else if (setShadow)
context->clearShadow();
}
static GraphicsContext::TextCheckingLineStyle textCheckingLineStyleForMarkerType(DocumentMarker::MarkerType markerType)
{
switch (markerType) {
case DocumentMarker::Spelling:
return GraphicsContext::TextCheckingSpellingLineStyle;
case DocumentMarker::Grammar:
return GraphicsContext::TextCheckingGrammarLineStyle;
case DocumentMarker::CorrectionIndicator:
return GraphicsContext::TextCheckingReplacementLineStyle;
default:
ASSERT_NOT_REACHED();
return GraphicsContext::TextCheckingSpellingLineStyle;
}
}
void InlineTextBox::paintSpellingOrGrammarMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, const DocumentMarker& marker, RenderStyle* style, const Font& font, bool grammar)
{
// Never print spelling/grammar markers (5327887)
if (textRenderer()->document()->printing())
return;
if (m_truncation == cFullTruncation)
return;
float start = 0; // start of line to draw, relative to tx
float width = m_logicalWidth; // how much line to draw
// Determine whether we need to measure text
bool markerSpansWholeBox = true;
if (m_start <= (int)marker.startOffset)
markerSpansWholeBox = false;
if ((end() + 1) != marker.endOffset) // end points at the last char, not past it
markerSpansWholeBox = false;
if (m_truncation != cNoTruncation)
markerSpansWholeBox = false;
if (!markerSpansWholeBox || grammar) {
int startPosition = max<int>(marker.startOffset - m_start, 0);
int endPosition = min<int>(marker.endOffset - m_start, m_len);
if (m_truncation != cNoTruncation)
endPosition = 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(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered());
// FIXME: Convert the document markers to float rects.
IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, startPoint, selHeight, startPosition, endPosition));
start = markerRect.x() - startPoint.x();
width = markerRect.width();
// Store rendered rects for bad grammar markers, so we can hit-test against it elsewhere in order to
// display a toolTip. We don't do this for misspelling markers.
if (grammar) {
markerRect.move(-boxOrigin.x(), -boxOrigin.y());
markerRect = renderer()->localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox();
renderer()->document()->markers()->setRenderedRectForMarker(renderer()->node(), marker, 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 = renderer()->style(m_firstLine)->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->drawLineForTextChecking(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + underlineOffset), width, textCheckingLineStyleForMarkerType(marker.type));
}
void InlineTextBox::paintTextMatchMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, const DocumentMarker& marker, RenderStyle* style, const Font& font)
{
// Use same y positioning and height as for selection, so that when the selection and this highlight are on
// the same word there are no pieces sticking out.
int deltaY = renderer()->style()->isFlippedLinesWritingMode() ? selectionBottom() - logicalBottom() : logicalTop() - selectionTop();
int selHeight = selectionHeight();
int sPos = max(marker.startOffset - m_start, (unsigned)0);
int ePos = min(marker.endOffset - m_start, (unsigned)m_len);
TextRun run(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered());
// Always compute and store the rect associated with this marker. The computed rect is in absolute coordinates.
IntRect markerRect = enclosingIntRect(font.selectionRectForText(run, IntPoint(m_x, selectionTop()), selHeight, sPos, ePos));
markerRect = renderer()->localToAbsoluteQuad(FloatRect(markerRect)).enclosingBoundingBox();
renderer()->document()->markers()->setRenderedRectForMarker(renderer()->node(), marker, markerRect);
// Optionally highlight the text
if (renderer()->frame()->editor()->markedTextMatchesAreHighlighted()) {
Color color = marker.activeMatch ?
renderer()->theme()->platformActiveTextSearchHighlightColor() :
renderer()->theme()->platformInactiveTextSearchHighlightColor();
pt->save();
updateGraphicsContext(pt, color, color, 0, style->colorSpace()); // Don't draw text at all!
#if PLATFORM(ANDROID)
pt->drawHighlightForText(font, run, FloatPoint(boxOrigin.x(), boxOrigin.y() - deltaY), selHeight, color, style->colorSpace(), sPos, ePos, marker.activeMatch);
#else
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);
#endif
pt->restore();
}
}
void InlineTextBox::computeRectForReplacementMarker(const DocumentMarker& marker, RenderStyle* style, const Font& font)
{
// Replacement markers are not actually drawn, but their rects need to be computed for hit testing.
int y = selectionTop();
int h = selectionHeight();
int sPos = max(marker.startOffset - m_start, (unsigned)0);
int ePos = min(marker.endOffset - m_start, (unsigned)m_len);
TextRun run(textRenderer()->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered());
IntPoint startPoint = IntPoint(m_x, y);
// 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();
renderer()->document()->markers()->setRenderedRectForMarker(renderer()->node(), marker, markerRect);
}
void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, bool background)
{
if (!renderer()->node())
return;
Vector<DocumentMarker> markers = renderer()->document()->markers()->markersForNode(renderer()->node());
Vector<DocumentMarker>::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++) {
const 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:
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:
paintSpellingOrGrammarMarker(pt, boxOrigin, marker, style, font, false);
break;
case DocumentMarker::Grammar:
paintSpellingOrGrammarMarker(pt, boxOrigin, marker, style, font, true);
break;
case DocumentMarker::TextMatch:
paintTextMatchMarker(pt, boxOrigin, marker, style, font);
break;
case DocumentMarker::CorrectionIndicator:
paintSpellingOrGrammarMarker(pt, boxOrigin, marker, style, font, false);
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 = toRenderText(renderer())->width(m_start, paintStart - m_start, textPos(), m_firstLine);
}
if (paintEnd != underline.endOffset) { // end points at the last char, not past it
paintEnd = min(paintEnd, (unsigned)underline.endOffset);
useWholeWidth = false;
}
if (m_truncation != cNoTruncation) {
paintEnd = min(paintEnd, (unsigned)m_start + m_truncation);
useWholeWidth = false;
}
if (!useWholeWidth) {
width = toRenderText(renderer())->width(paintStart, paintEnd - paintStart, textPos() + start, m_firstLine);
}
// Thick marked text underlines are 2px thick as long as there is room for the 2px line under the baseline.
// All other marked text underlines are 1px thick.
// If there's not enough space the underline will touch or overlap characters.
int lineThickness = 1;
int baseline = renderer()->style(m_firstLine)->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, textRenderer()->document()->printing());
}
int InlineTextBox::caretMinOffset() const
{
return m_start;
}
int InlineTextBox::caretMaxOffset() const
{
return m_start + m_len;
}
unsigned InlineTextBox::caretMaxRenderedOffset() 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;
int leftOffset = isLeftToRightDirection() ? 0 : m_len;
int rightOffset = isLeftToRightDirection() ? m_len : 0;
bool blockIsInOppositeDirection = renderer()->containingBlock()->style()->isLeftToRightDirection() != isLeftToRightDirection();
if (blockIsInOppositeDirection)
swap(leftOffset, rightOffset);
if (lineOffset - logicalLeft() > logicalWidth())
return rightOffset;
if (lineOffset - logicalLeft() < 0)
return leftOffset;
RenderText* text = toRenderText(renderer());
RenderStyle* style = text->style(m_firstLine);
const Font* f = &style->font();
int offset = f->offsetForPosition(TextRun(textRenderer()->text()->characters() + m_start, m_len,
textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride || style->visuallyOrdered()),
lineOffset - logicalLeft(), includePartialGlyphs);
if (blockIsInOppositeDirection && (!offset || offset == m_len))
return !offset ? m_len : 0;
return offset;
}
float InlineTextBox::positionForOffset(int offset) const
{
ASSERT(offset >= m_start);
ASSERT(offset <= m_start + m_len);
if (isLineBreak())
return logicalLeft();
RenderText* text = toRenderText(renderer());
const Font& f = text->style(m_firstLine)->font();
int from = !isLeftToRightDirection() ? offset - m_start : 0;
int to = !isLeftToRightDirection() ? m_len : offset - m_start;
// FIXME: Do we need to add rightBearing here?
return f.selectionRectForText(TextRun(text->text()->characters() + m_start, m_len, textRenderer()->allowTabs(), textPos(), m_expansion, expansionBehavior(), !isLeftToRightDirection(), m_dirOverride),
IntPoint(logicalLeft(), 0), 0, from, to).maxX();
}
bool InlineTextBox::containsCaretOffset(int offset) const
{
// Offsets before the box are never "in".
if (offset < m_start)
return false;
int pastEnd = m_start + m_len;
// Offsets inside the box (not at either edge) are always "in".
if (offset < pastEnd)
return true;
// Offsets outside the box are always "out".
if (offset > pastEnd)
return false;
// Offsets at the end are "out" for line breaks (they are on the next line).
if (isLineBreak())
return false;
// Offsets at the end are "in" for normal boxes (but the caller has to check affinity).
return true;
}
} // namespace WebCore