void RenderFrame::layout()
{
FrameView* view = static_cast<FrameView*>(widget());
RenderView* root = view ? view->frame()->contentRenderer() : 0;
// Do not expand frames which has zero width or height
if (!width() || !height() || !root) {
updateWidgetPosition();
if (view)
view->layout();
setNeedsLayout(false);
return;
}
HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());
if (element->scrollingMode() == ScrollbarAlwaysOff && !root->isFrameSet()) {
setNeedsLayout(false);
return;
}
// Update the dimensions to get the correct width and height
updateWidgetPosition();
if (root->preferredLogicalWidthsDirty())
root->computePreferredLogicalWidths();
// Expand the frame by setting frame height = content height
setWidth(max(view->contentsWidth() + borderAndPaddingWidth(), width()));
setHeight(max(view->contentsHeight() + borderAndPaddingHeight(), height()));
// Update one more time
updateWidgetPosition();
setNeedsLayout(false);
}
void RenderFrameBase::layoutWithFlattening(bool fixedWidth, bool fixedHeight)
{
FrameView* childFrameView = static_cast<FrameView*>(widget());
RenderView* childRoot = childFrameView ? static_cast<RenderView*>(childFrameView->frame()->contentRenderer()) : 0;
// Do not expand frames which has zero width or height
if (!width() || !height() || !childRoot) {
updateWidgetPosition();
if (childFrameView)
childFrameView->layout();
setNeedsLayout(false);
return;
}
// need to update to calculate min/max correctly
updateWidgetPosition();
if (childRoot->preferredLogicalWidthsDirty())
childRoot->computePreferredLogicalWidths();
// if scrollbars are off, and the width or height are fixed
// we obey them and do not expand. With frame flattening
// no subframe much ever become scrollable.
HTMLFrameElementBase* element = static_cast<HTMLFrameElementBase*>(node());
bool isScrollable = element->scrollingMode() != ScrollbarAlwaysOff;
// consider iframe inset border
int hBorder = borderLeft() + borderRight();
int vBorder = borderTop() + borderBottom();
// make sure minimum preferred width is enforced
if (isScrollable || !fixedWidth) {
setWidth(max(width(), childRoot->minPreferredLogicalWidth() + hBorder));
// update again to pass the new width to the child frame
updateWidgetPosition();
childFrameView->layout();
}
// expand the frame by setting frame height = content height
if (isScrollable || !fixedHeight || childRoot->isFrameSet())
setHeight(max(height(), childFrameView->contentsHeight() + vBorder));
if (isScrollable || !fixedWidth || childRoot->isFrameSet())
setWidth(max(width(), childFrameView->contentsWidth() + hBorder));
updateWidgetPosition();
ASSERT(!childFrameView->layoutPending());
ASSERT(!childRoot->needsLayout());
ASSERT(!childRoot->firstChild() || !childRoot->firstChild()->firstChild() || !childRoot->firstChild()->firstChild()->needsLayout());
setNeedsLayout(false);
}