Created
January 23, 2012 12:33
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namespace WebCore { | |
namespace{ | |
inline LayoutSize frameToMainFrameOffset(Frame* frame) | |
{ | |
LayoutPoint mainFramePoint = frame->page()->mainFrame()->view()->rootViewToContents(frame->view()->contentsToRootView(LayoutPoint())); | |
return toLayoutSize(mainFramePoint); | |
} | |
} // anonymous namespace | |
namespace GestureTapHighlighter { | |
void drawHighlight(GraphicsContext* context, Node* node, const Color& color) | |
{ | |
RenderObject* renderer = node->renderer(); | |
Frame* containingFrame = node->document()->frame(); | |
if (!renderer || !containingFrame || !context) | |
return; | |
LayoutSize mainFrameOffset = frameToMainFrameOffset(containingFrame); | |
// Don't translate the context if the frame is rendered in page coordinates. | |
FrameView* view = containingFrame->page()->mainFrame()->view(); | |
if (!view->delegatesScrolling()) { | |
FloatRect visibleRect = view->visibleContentRect(); | |
context->translate(-visibleRect.x(), -visibleRect.y()); | |
} | |
if (renderer->isBox() || renderer->isRenderInline()) { | |
LayoutRect contentBox; | |
LayoutRect paddingBox; | |
LayoutRect borderBox; | |
if (renderer->isBox()) { | |
RenderBox* renderBox = toRenderBox(renderer); | |
contentBox = renderBox->contentBoxRect(); | |
paddingBox = LayoutRect(contentBox.x() - renderBox->paddingLeft(), contentBox.y() - renderBox->paddingTop(), | |
contentBox.width() + renderBox->paddingLeft() + renderBox->paddingRight(), contentBox.height() + renderBox->paddingTop() + renderBox->paddingBottom()); | |
borderBox = LayoutRect(paddingBox.x() - renderBox->borderLeft(), paddingBox.y() - renderBox->borderTop(), | |
paddingBox.width() + renderBox->borderLeft() + renderBox->borderRight(), paddingBox.height() + renderBox->borderTop() + renderBox->borderBottom()); | |
} else { | |
RenderInline* renderInline = toRenderInline(renderer); | |
// RenderInline's bounding box includes paddings and borders, excludes margins. | |
borderBox = renderInline->linesBoundingBox(); | |
} | |
RoundedRect rect(borderBox); | |
rect.expandRadii(10); | |
rect.inflateWithRadii(5); | |
AffineTransform trans; | |
LayoutPoint referencePoint; | |
while (renderer) { | |
RenderObject* next = renderer->container(); | |
if (!next) | |
break; | |
LayoutSize containerOffset = renderer->offsetFromContainer(next, referencePoint); | |
TransformationMatrix t; | |
renderer->getTransformFromContainer(next, containerOffset, t); | |
trans *= t.toAffineTransform(); | |
referencePoint.move(containerOffset); | |
renderer = next; | |
} | |
rect.move(mainFrameOffset); | |
context->concatCTM(trans); | |
context->fillRoundedRect(rect, color, ColorSpaceDeviceRGB); | |
} | |
} | |
} // namespace GestureTapHighlighter | |
} // namespace WebCore |
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