FloatRect SVGInlineTextBox::selectionRectForTextFragment(const SVGTextFragment& fragment, int startPosition, int endPosition, RenderStyle* style)
{
ASSERT(startPosition < endPosition);
ASSERT(style);
FontCachePurgePreventer fontCachePurgePreventer;
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
float scalingFactor = textRenderer->scalingFactor();
ASSERT(scalingFactor);
const Font& scaledFont = textRenderer->scaledFont();
const FontMetrics& scaledFontMetrics = scaledFont.fontMetrics();
FloatPoint textOrigin(fragment.x, fragment.y);
if (scalingFactor != 1)
textOrigin.scale(scalingFactor, scalingFactor);
textOrigin.move(0, -scaledFontMetrics.floatAscent());
FloatRect selectionRect = scaledFont.selectionRectForText(constructTextRun(style, fragment), textOrigin, fragment.height * scalingFactor, startPosition, endPosition);
if (scalingFactor == 1)
return selectionRect;
selectionRect.scale(1 / scalingFactor);
return selectionRect;
}
FloatRect SVGInlineTextBox::calculateBoundaries() const
{
FloatRect textRect;
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
float scalingFactor = textRenderer->scalingFactor();
ASSERT(scalingFactor);
float baseline = textRenderer->scaledFont().fontMetrics().floatAscent() / scalingFactor;
AffineTransform fragmentTransform;
unsigned textFragmentsSize = m_textFragments.size();
for (unsigned i = 0; i < textFragmentsSize; ++i) {
const SVGTextFragment& fragment = m_textFragments.at(i);
FloatRect fragmentRect(fragment.x, fragment.y - baseline, fragment.width, fragment.height);
fragment.buildFragmentTransform(fragmentTransform);
if (!fragmentTransform.isIdentity())
fragmentRect = fragmentTransform.mapRect(fragmentRect);
textRect.unite(fragmentRect);
}
return textRect;
}
void SVGInlineTextBox::paintTextWithShadows(GraphicsContext* context, RenderStyle* style, TextRun& textRun, const SVGTextFragment& fragment, int startPosition, int endPosition)
{
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
float scalingFactor = textRenderer->scalingFactor();
ASSERT(scalingFactor);
const Font& scaledFont = textRenderer->scaledFont();
const ShadowData* shadow = style->textShadow();
FloatPoint textOrigin(fragment.x, fragment.y);
FloatSize textSize(fragment.width, fragment.height);
if (scalingFactor != 1) {
textOrigin.scale(scalingFactor, scalingFactor);
textSize.scale(scalingFactor);
}
FloatRect shadowRect(FloatPoint(textOrigin.x(), textOrigin.y() - scaledFont.fontMetrics().floatAscent()), textSize);
do {
if (!prepareGraphicsContextForTextPainting(context, scalingFactor, textRun, style))
break;
FloatSize extraOffset;
if (shadow)
extraOffset = applyShadowToGraphicsContext(context, shadow, shadowRect, false /* stroked */, true /* opaque */, true /* horizontal */);
AffineTransform originalTransform;
if (scalingFactor != 1) {
originalTransform = context->getCTM();
AffineTransform newTransform = originalTransform;
newTransform.scale(1 / scalingFactor);
normalizeTransform(newTransform);
context->setCTM(newTransform);
}
scaledFont.drawText(context, textRun, textOrigin + extraOffset, startPosition, endPosition);
if (scalingFactor != 1)
context->setCTM(originalTransform);
restoreGraphicsContextAfterTextPainting(context, textRun);
if (!shadow)
break;
if (shadow->next())
context->restore();
else
context->clearShadow();
shadow = shadow->next();
} while (shadow);
}
static inline FloatRect calculateFragmentBoundaries(const RenderSVGInlineText& textRenderer, const SVGTextFragment& fragment)
{
float scalingFactor = textRenderer.scalingFactor();
ASSERT(scalingFactor);
float baseline = textRenderer.scaledFont().fontMetrics().floatAscent() / scalingFactor;
AffineTransform fragmentTransform;
FloatRect fragmentRect(fragment.x, fragment.y - baseline, fragment.width, fragment.height);
fragment.buildFragmentTransform(fragmentTransform);
return fragmentTransform.mapRect(fragmentRect);
}
void SVGInlineTextBox::paintTextWithShadows(GraphicsContext* context, RenderStyle* style, TextRun& textRun, const SVGTextFragment& fragment, int startPosition, int endPosition)
{
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
float scalingFactor = textRenderer->scalingFactor();
ASSERT(scalingFactor);
const Font& scaledFont = textRenderer->scaledFont();
const ShadowList* shadowList = style->textShadow();
// Text shadows are disabled when printing. http://crbug.com/258321
bool hasShadow = shadowList && !context->printing();
FloatPoint textOrigin(fragment.x, fragment.y);
FloatSize textSize(fragment.width, fragment.height);
if (scalingFactor != 1) {
textOrigin.scale(scalingFactor, scalingFactor);
textSize.scale(scalingFactor);
context->save();
context->scale(FloatSize(1 / scalingFactor, 1 / scalingFactor));
}
if (hasShadow) {
DrawLooper drawLooper;
for (size_t i = shadowList->shadows().size(); i--; ) {
const ShadowData& shadow = shadowList->shadows()[i];
FloatSize offset(shadow.x(), shadow.y());
drawLooper.addShadow(offset, shadow.blur(), shadow.color(),
DrawLooper::ShadowRespectsTransforms, DrawLooper::ShadowRespectsAlpha);
}
drawLooper.addUnmodifiedContent();
context->setDrawLooper(drawLooper);
}
if (prepareGraphicsContextForTextPainting(context, scalingFactor, textRun, style)) {
TextRunPaintInfo textRunPaintInfo(textRun);
textRunPaintInfo.from = startPosition;
textRunPaintInfo.to = endPosition;
textRunPaintInfo.bounds = FloatRect(textOrigin, textSize);
scaledFont.drawText(context, textRunPaintInfo, textOrigin);
restoreGraphicsContextAfterTextPainting(context, textRun);
}
if (scalingFactor != 1)
context->restore();
else if (hasShadow)
context->clearShadow();
}
int SVGInlineTextBox::offsetForPositionInFragment(const SVGTextFragment& fragment, float position, bool includePartialGlyphs) const
{
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
float scalingFactor = textRenderer->scalingFactor();
ASSERT(scalingFactor);
RenderStyle* style = textRenderer->style();
ASSERT(style);
TextRun textRun = constructTextRun(style, fragment);
// Eventually handle lengthAdjust="spacingAndGlyphs".
// FIXME: Handle vertical text.
AffineTransform fragmentTransform;
fragment.buildFragmentTransform(fragmentTransform);
if (!fragmentTransform.isIdentity())
textRun.setHorizontalGlyphStretch(narrowPrecisionToFloat(fragmentTransform.xScale()));
return fragment.characterOffset - start() + textRenderer->scaledFont().offsetForPosition(textRun, position * scalingFactor, includePartialGlyphs);
}
void SVGInlineTextBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit, LayoutUnit)
{
ASSERT(paintInfo.shouldPaintWithinRoot(renderer()));
ASSERT(paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection);
ASSERT(truncation() == cNoTruncation);
if (renderer()->style()->visibility() != VISIBLE)
return;
// Note: We're explicitely not supporting composition & custom underlines and custom highlighters - unlike InlineTextBox.
// If we ever need that for SVG, it's very easy to refactor and reuse the code.
RenderObject* parentRenderer = parent()->renderer();
ASSERT(parentRenderer);
bool paintSelectedTextOnly = paintInfo.phase == PaintPhaseSelection;
bool hasSelection = !parentRenderer->document().printing() && selectionState() != RenderObject::SelectionNone;
if (!hasSelection && paintSelectedTextOnly)
return;
RenderSVGInlineText* textRenderer = toRenderSVGInlineText(this->textRenderer());
ASSERT(textRenderer);
if (!textShouldBePainted(textRenderer))
return;
RenderStyle* style = parentRenderer->style();
ASSERT(style);
paintDocumentMarkers(paintInfo.context, paintOffset, style, textRenderer->scaledFont(), true);
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
bool hasFill = svgStyle->hasFill();
bool hasVisibleStroke = svgStyle->hasVisibleStroke();
RenderStyle* selectionStyle = style;
if (hasSelection) {
selectionStyle = parentRenderer->getCachedPseudoStyle(SELECTION);
if (selectionStyle) {
const SVGRenderStyle* svgSelectionStyle = selectionStyle->svgStyle();
ASSERT(svgSelectionStyle);
if (!hasFill)
hasFill = svgSelectionStyle->hasFill();
if (!hasVisibleStroke)
hasVisibleStroke = svgSelectionStyle->hasVisibleStroke();
} else
selectionStyle = style;
}
if (textRenderer->frame() && textRenderer->frame()->view() && textRenderer->frame()->view()->paintBehavior() & PaintBehaviorRenderingSVGMask) {
hasFill = true;
hasVisibleStroke = false;
}
AffineTransform fragmentTransform;
unsigned textFragmentsSize = m_textFragments.size();
for (unsigned i = 0; i < textFragmentsSize; ++i) {
SVGTextFragment& fragment = m_textFragments.at(i);
ASSERT(!m_paintingResource);
GraphicsContextStateSaver stateSaver(*paintInfo.context, false);
fragment.buildFragmentTransform(fragmentTransform);
if (!fragmentTransform.isIdentity()) {
stateSaver.save();
paintInfo.context->concatCTM(fragmentTransform);
}
// Spec: All text decorations except line-through should be drawn before the text is filled and stroked; thus, the text is rendered on top of these decorations.
unsigned decorations = style->textDecorationsInEffect();
if (decorations & TextDecorationUnderline)
paintDecoration(paintInfo.context, TextDecorationUnderline, fragment);
if (decorations & TextDecorationOverline)
paintDecoration(paintInfo.context, TextDecorationOverline, fragment);
for (int i = 0; i < 3; i++) {
switch (svgStyle->paintOrderType(i)) {
case PT_FILL:
// Fill text
if (hasFill) {
m_paintingResourceMode = ApplyToFillMode | ApplyToTextMode;
paintText(paintInfo.context, style, selectionStyle, fragment, hasSelection, paintSelectedTextOnly);
}
break;
case PT_STROKE:
// Stroke text
if (hasVisibleStroke) {
m_paintingResourceMode = ApplyToStrokeMode | ApplyToTextMode;
paintText(paintInfo.context, style, selectionStyle, fragment, hasSelection, paintSelectedTextOnly);
}
break;
case PT_MARKERS:
// Markers don't apply to text
break;
default:
ASSERT_NOT_REACHED();
break;
}
}
// Spec: Line-through should be drawn after the text is filled and stroked; thus, the line-through is rendered on top of the text.
if (decorations & TextDecorationLineThrough)
paintDecoration(paintInfo.context, TextDecorationLineThrough, fragment);
m_paintingResourceMode = ApplyToDefaultMode;
}
ASSERT(!m_paintingResource);
}
static inline bool textShouldBePainted(const RenderSVGInlineText& textRenderer)
{
// Font::pixelSize(), returns FontDescription::computedPixelSize(), which returns "int(x + 0.5)".
// If the absolute font size on screen is below x=0.5, don't render anything.
return textRenderer.scaledFont().pixelSize();
}