// This function appears to heuristically guess whether to include a background
// image in the smart clip. It seems to want to include sprites created from
// CSS background images but to skip actual backgrounds.
bool SmartClip::shouldSkipBackgroundImage(Node* node)
{
ASSERT(node);
// Apparently we're only interested in background images on spans and divs.
if (!isHTMLSpanElement(*node) && !isHTMLDivElement(*node))
return true;
// This check actually makes a bit of sense. If you're going to sprite an
// image out of a CSS background, you're probably going to specify a height
// or a width. On the other hand, if we've got a legit background image,
// it's very likely the height or the width will be set to auto.
RenderObject* renderer = node->renderer();
if (renderer && (renderer->style()->logicalHeight().isAuto() || renderer->style()->logicalWidth().isAuto()))
return true;
return false;
}
bool isPlainTextMarkup(Node* node) {
DCHECK(node);
if (!isHTMLDivElement(*node))
return false;
HTMLDivElement& element = toHTMLDivElement(*node);
if (!element.hasAttributes())
return false;
if (element.hasOneChild())
return element.firstChild()->isTextNode() ||
element.firstChild()->hasChildren();
return element.hasChildCount(2) &&
isTabHTMLSpanElementTextNode(element.firstChild()->firstChild()) &&
element.lastChild()->isTextNode();
}