int PrintContext::pageNumberForElement(Element* element, const FloatSize& pageSizeInPixels)
{
// Make sure the element is not freed during the layout.
RefPtr<Element> elementRef(element);
element->document()->updateLayout();
RenderBoxModelObject* box = enclosingBoxModelObject(element->renderer());
if (!box)
return -1;
Frame* frame = element->document()->frame();
FloatRect pageRect(FloatPoint(0, 0), pageSizeInPixels);
PrintContext printContext(frame);
printContext.begin(pageRect.width(), pageRect.height());
FloatSize scaledPageSize = pageSizeInPixels;
scaledPageSize.scale(frame->view()->contentsSize().width() / pageRect.width());
printContext.computePageRectsWithPageSize(scaledPageSize, false);
int top = box->pixelSnappedOffsetTop();
int left = box->pixelSnappedOffsetLeft();
size_t pageNumber = 0;
for (; pageNumber < printContext.pageCount(); pageNumber++) {
const IntRect& page = printContext.pageRect(pageNumber);
if (page.x() <= left && left < page.maxX() && page.y() <= top && top < page.maxY())
return pageNumber;
}
return -1;
}
String markerTextForListItem(Element* element)
{
// Make sure the element is not freed during the layout.
RefPtr<Element> elementRef(element);
element->document()->updateLayout();
RenderObject* renderer = element->renderer();
if (!renderer || !renderer->isListItem())
return String();
return toRenderListItem(renderer)->markerText();
}
String counterValueForElement(Element* element)
{
// Make sure the element is not freed during the layout.
RefPtr<Element> elementRef(element);
element->document()->updateLayout();
TextStream stream;
bool isFirstCounter = true;
// The counter renderers should be children of :before or :after pseudo-elements.
if (RenderObject* renderer = element->renderer()) {
if (RenderObject* pseudoElement = renderer->beforePseudoElementRenderer())
writeCounterValuesFromChildren(stream, pseudoElement, isFirstCounter);
if (RenderObject* pseudoElement = renderer->afterPseudoElementRenderer())
writeCounterValuesFromChildren(stream, pseudoElement, isFirstCounter);
}
return stream.release();
}
