зеркало из https://github.com/mozilla/gecko-dev.git
63 строки
2.3 KiB
C++
63 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
//
|
|
// Eric Vaughan
|
|
// Netscape Communications
|
|
//
|
|
// See documentation in associated header file
|
|
//
|
|
|
|
#include "nsStackFrame.h"
|
|
|
|
#include "mozilla/ComputedStyle.h"
|
|
#include "mozilla/PresShell.h"
|
|
#include "nsIContent.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsCSSRendering.h"
|
|
#include "nsBoxLayoutState.h"
|
|
#include "nsStackLayout.h"
|
|
#include "nsDisplayList.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
nsIFrame* NS_NewStackFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
|
|
return new (aPresShell) nsStackFrame(aStyle, aPresShell->GetPresContext());
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsStackFrame)
|
|
|
|
nsStackFrame::nsStackFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
|
|
: nsBoxFrame(aStyle, aPresContext, kClassID) {
|
|
nsCOMPtr<nsBoxLayout> layout;
|
|
NS_NewStackLayout(layout);
|
|
SetXULLayoutManager(layout);
|
|
}
|
|
|
|
// REVIEW: The old code put everything in the background layer. To be more
|
|
// consistent with the way other frames work, I'm putting everything in the
|
|
// Content() (i.e., foreground) layer (see nsFrame::BuildDisplayListForChild,
|
|
// the case for stacking context but non-positioned, non-floating frames).
|
|
// This could easily be changed back by hacking
|
|
// nsBoxFrame::BuildDisplayListInternal a bit more.
|
|
void nsStackFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
|
|
const nsDisplayListSet& aLists) {
|
|
// BuildDisplayListForChild puts stacking contexts into the
|
|
// PositionedDescendants list. So we need to map that list to
|
|
// aLists.Content(). This is an easy way to do that.
|
|
nsDisplayList* content = aLists.Content();
|
|
nsDisplayListSet kidLists(content, content, content, content, content,
|
|
content);
|
|
nsIFrame* kid = mFrames.FirstChild();
|
|
while (kid) {
|
|
// Force each child into its own true stacking context.
|
|
BuildDisplayListForChild(aBuilder, kid, kidLists,
|
|
DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|