зеркало из https://github.com/mozilla/pjs.git
615 строки
19 KiB
C++
615 строки
19 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsContainerFrame.h"
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#include "nsIContent.h"
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#include "nsIPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsISpaceManager.h"
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#include "nsIStyleContext.h"
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#include "nsRect.h"
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#include "nsPoint.h"
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#include "nsGUIEvent.h"
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#include "nsStyleConsts.h"
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#include "nsIView.h"
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#include "nsVoidArray.h"
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#include "nsISizeOfHandler.h"
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#include "nsIReflowCommand.h"
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#include "nsHTMLIIDs.h"
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#include "nsHTMLContainerFrame.h"
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#ifdef NS_DEBUG
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#undef NOISY
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#else
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#undef NOISY
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#endif
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nsContainerFrame::nsContainerFrame()
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{
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}
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nsContainerFrame::~nsContainerFrame()
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{
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}
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NS_IMETHODIMP
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nsContainerFrame::SetInitialChildList(nsIPresContext& aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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// NS_PRECONDITION(mFrames.IsEmpty(), "already initialized");
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nsresult result;
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if (!mFrames.IsEmpty()) {
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// We already have child frames which means we've already been
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// initialized
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result = NS_ERROR_UNEXPECTED;
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} else if (aListName) {
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// All we know about is the unnamed principal child list
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result = NS_ERROR_INVALID_ARG;
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} else {
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#ifdef NS_DEBUG
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nsFrame::VerifyDirtyBitSet(aChildList);
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#endif
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mFrames.SetFrames(aChildList);
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result = NS_OK;
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}
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return result;
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}
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NS_IMETHODIMP
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nsContainerFrame::Destroy(nsIPresContext& aPresContext)
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{
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// Prevent event dispatch during destruction
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nsIView* view;
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GetView(&view);
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if (nsnull != view) {
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view->SetClientData(nsnull);
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}
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// Delete the primary child list
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mFrames.DestroyFrames(aPresContext);
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// Base class will destroy the frame
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return nsFrame::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsContainerFrame::DidReflow(nsIPresContext& aPresContext,
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nsDidReflowStatus aStatus)
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{
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NS_FRAME_TRACE_MSG(NS_FRAME_TRACE_CALLS,
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("enter nsContainerFrame::DidReflow: status=%d",
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aStatus));
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// Let nsFrame position and size our view (if we have one), and clear
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// the NS_FRAME_IN_REFLOW bit
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nsresult result = nsFrame::DidReflow(aPresContext, aStatus);
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if (NS_FRAME_REFLOW_FINISHED == aStatus) {
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// Apply DidReflow to each and every list that this frame implements
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nsIAtom* listName = nsnull;
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PRInt32 listIndex = 0;
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do {
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nsIFrame* kid;
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FirstChild(listName, &kid);
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while (nsnull != kid) {
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nsIHTMLReflow* htmlReflow;
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nsresult rv;
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rv = kid->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
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if (NS_SUCCEEDED(rv)) {
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htmlReflow->DidReflow(aPresContext, aStatus);
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}
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kid->GetNextSibling(&kid);
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}
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NS_IF_RELEASE(listName);
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GetAdditionalChildListName(listIndex++, &listName);
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} while(nsnull != listName);
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}
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NS_FRAME_TRACE_OUT("nsContainerFrame::DidReflow");
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return result;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Child frame enumeration
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NS_IMETHODIMP
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nsContainerFrame::FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const
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{
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NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
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// We only know about the unnamed principal child list
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if (nsnull == aListName) {
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*aFirstChild = mFrames.FirstChild();
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return NS_OK;
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} else {
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*aFirstChild = nsnull;
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return NS_ERROR_INVALID_ARG;
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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// Painting/Events
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NS_IMETHODIMP
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nsContainerFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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return NS_OK;
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}
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// Paint the children of a container, assuming nothing about the
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// childrens spatial arrangement. Given relative positioning, negative
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// margins, etc, that's probably a good thing.
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//
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// Note: aDirtyRect is in our coordinate system (and of course, child
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// rect's are also in our coordinate system)
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void
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nsContainerFrame::PaintChildren(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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const nsStyleDisplay* disp = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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// Child elements have the opportunity to override the visibility property
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// of their parent and display even if the parent is hidden
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PRBool clipState;
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// If overflow is hidden then set the clip rect so that children
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// don't leak out of us
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if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
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aRenderingContext.PushState();
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aRenderingContext.SetClipRect(nsRect(0, 0, mRect.width, mRect.height),
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nsClipCombine_kIntersect, clipState);
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}
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nsIFrame* kid = mFrames.FirstChild();
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while (nsnull != kid) {
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PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid, aWhichLayer);
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kid->GetNextSibling(&kid);
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}
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if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
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aRenderingContext.PopState(clipState);
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}
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}
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// Paint one child frame
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void
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nsContainerFrame::PaintChild(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsIFrame* aFrame,
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nsFramePaintLayer aWhichLayer)
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{
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nsIView *pView;
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aFrame->GetView(&pView);
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if (nsnull == pView) {
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nsRect kidRect;
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aFrame->GetRect(kidRect);
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nsFrameState state;
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aFrame->GetFrameState(&state);
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// Compute the constrained damage area; set the overlap flag to
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// PR_TRUE if any portion of the child frame intersects the
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// dirty rect.
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nsRect damageArea;
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PRBool overlap;
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if (NS_FRAME_OUTSIDE_CHILDREN & state) {
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// If the child frame has children that leak out of our box
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// then we don't constrain the damageArea to just the childs
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// bounding rect.
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damageArea = aDirtyRect;
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overlap = PR_TRUE;
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}
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else {
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// Compute the intersection of the dirty rect and the childs
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// rect (both are in our coordinate space). This limits the
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// damageArea to just the portion that intersects the childs
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// rect.
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overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
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#ifdef NS_DEBUG
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if (!overlap && (0 == kidRect.width) && (0 == kidRect.height)) {
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overlap = PR_TRUE;
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}
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#endif
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}
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if (overlap) {
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// Translate damage area into the kids coordinate
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// system. Translate rendering context into the kids
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// coordinate system.
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damageArea.x -= kidRect.x;
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damageArea.y -= kidRect.y;
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aRenderingContext.PushState();
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aRenderingContext.Translate(kidRect.x, kidRect.y);
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// Paint the kid
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aFrame->Paint(aPresContext, aRenderingContext, damageArea, aWhichLayer);
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PRBool clipState;
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aRenderingContext.PopState(clipState);
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#ifdef NS_DEBUG
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// Draw a border around the child
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if (nsIFrame::GetShowFrameBorders() && !kidRect.IsEmpty()) {
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aRenderingContext.SetColor(NS_RGB(255,0,0));
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aRenderingContext.DrawRect(kidRect);
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}
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#endif
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}
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}
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}
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NS_IMETHODIMP
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nsContainerFrame::GetFrameForPoint(const nsPoint& aPoint,
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nsIFrame** aFrame)
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{
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return GetFrameForPointUsing(aPoint, nsnull, aFrame);
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}
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nsresult
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nsContainerFrame::GetFrameForPointUsing(const nsPoint& aPoint,
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nsIAtom* aList,
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nsIFrame** aFrame)
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{
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nsIFrame* kid;
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nsRect kidRect;
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nsPoint tmp;
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*aFrame = this;
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FirstChild(aList, &kid);
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while (nsnull != kid) {
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kid->GetRect(kidRect);
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if (kidRect.Contains(aPoint)) {
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tmp.MoveTo(aPoint.x - kidRect.x, aPoint.y - kidRect.y);
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return kid->GetFrameForPoint(tmp, aFrame);
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}
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kid->GetNextSibling(&kid);
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}
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FirstChild(aList, &kid);
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while (nsnull != kid) {
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nsFrameState state;
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kid->GetFrameState(&state);
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if (NS_FRAME_OUTSIDE_CHILDREN & state) {
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kid->GetRect(kidRect);
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tmp.MoveTo(aPoint.x - kidRect.x, aPoint.y - kidRect.y);
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if (NS_OK == kid->GetFrameForPoint(tmp, aFrame)) {
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return NS_OK;
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}
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else {
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*aFrame = this;
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}
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}
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kid->GetNextSibling(&kid);
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}
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsContainerFrame::ReplaceFrame(nsIPresContext& aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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nsIFrame* prevFrame;
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nsIFrame* firstChild;
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nsresult rv;
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// Get the old frame's previous sibling frame
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FirstChild(aListName, &firstChild);
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nsFrameList frames(firstChild);
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NS_ASSERTION(frames.ContainsFrame(aOldFrame), "frame is not a valid child frame");
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prevFrame = frames.GetPrevSiblingFor(aOldFrame);
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// Default implementation treats it like two separate operations
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rv = RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
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if (NS_SUCCEEDED(rv)) {
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rv = InsertFrames(aPresContext, aPresShell, aListName, prevFrame, aNewFrame);
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}
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return rv;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Helper member functions
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/**
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* Queries the child frame for the nsIHTMLReflow interface and if it's
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* supported invokes the WillReflow() and Reflow() member functions. If
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* the reflow succeeds and the child frame is complete, deletes any
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* next-in-flows using DeleteChildsNextInFlow()
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*/
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nsresult
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nsContainerFrame::ReflowChild(nsIFrame* aKidFrame,
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nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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NS_PRECONDITION(aReflowState.frame == aKidFrame, "bad reflow state");
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// Query for the nsIHTMLReflow interface
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nsIHTMLReflow* htmlReflow;
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nsresult result;
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result = aKidFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
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if (NS_FAILED(result)) {
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return result;
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}
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#ifdef DEBUG
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nsSize* saveMaxElementSize = aDesiredSize.maxElementSize;
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#ifdef REALLY_NOISY_MAX_ELEMENT_SIZE
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if (nsnull != aDesiredSize.maxElementSize) {
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aDesiredSize.maxElementSize->width = nscoord(0xdeadbeef);
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aDesiredSize.maxElementSize->height = nscoord(0xdeadbeef);
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}
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#endif
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#endif
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// Send the WillReflow notification, and reflow the child frame
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htmlReflow->WillReflow(aPresContext);
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result = htmlReflow->Reflow(aPresContext, aDesiredSize, aReflowState,
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aStatus);
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#ifdef DEBUG
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if (saveMaxElementSize != aDesiredSize.maxElementSize) {
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printf("nsContainerFrame: ");
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nsFrame::ListTag(stdout, aKidFrame);
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printf(" changed the maxElementSize *pointer* (baaaad boy!)\n");
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}
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#ifdef REALLY_NOISY_MAX_ELEMENT_SIZE
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if ((nsnull != aDesiredSize.maxElementSize) &&
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((nscoord(0xdeadbeef) == aDesiredSize.maxElementSize->width) ||
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(nscoord(0xdeadbeef) == aDesiredSize.maxElementSize->height))) {
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printf("nsContainerFrame: ");
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nsFrame::ListTag(stdout, aKidFrame);
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printf(" didn't set max-element-size!\n");
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aDesiredSize.maxElementSize->width = 0;
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aDesiredSize.maxElementSize->height = 0;
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}
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#endif
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#endif
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// If the reflow was successful and the child frame is complete, delete any
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// next-in-flows
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if (NS_SUCCEEDED(result) && NS_FRAME_IS_COMPLETE(aStatus)) {
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nsIFrame* kidNextInFlow;
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aKidFrame->GetNextInFlow(&kidNextInFlow);
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if (nsnull != kidNextInFlow) {
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// Remove all of the childs next-in-flows. Make sure that we ask
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// the right parent to do the removal (it's possible that the
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// parent is not this because we are executing pullup code)
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nsIFrame* parent;
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aKidFrame->GetParent(&parent);
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((nsContainerFrame*)parent)->DeleteChildsNextInFlow(aPresContext,
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aKidFrame);
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}
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}
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return result;
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}
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/**
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* Remove and delete aChild's next-in-flow(s). Updates the sibling and flow
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* pointers
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*
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* @param aChild child this child's next-in-flow
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* @return PR_TRUE if successful and PR_FALSE otherwise
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*/
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void
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nsContainerFrame::DeleteChildsNextInFlow(nsIPresContext& aPresContext,
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nsIFrame* aChild)
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{
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NS_PRECONDITION(mFrames.ContainsFrame(aChild), "bad geometric parent");
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nsIFrame* nextInFlow;
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nsContainerFrame* parent;
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aChild->GetNextInFlow(&nextInFlow);
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NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
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nextInFlow->GetParent((nsIFrame**)&parent);
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// If the next-in-flow has a next-in-flow then delete it, too (and
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// delete it first).
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nsIFrame* nextNextInFlow;
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nextInFlow->GetNextInFlow(&nextNextInFlow);
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if (nsnull != nextNextInFlow) {
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parent->DeleteChildsNextInFlow(aPresContext, nextInFlow);
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}
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// Disconnect the next-in-flow from the flow list
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nextInFlow->BreakFromPrevFlow();
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// Take the next-in-flow out of the parent's child list
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PRBool result = parent->mFrames.RemoveFrame(nextInFlow);
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NS_ASSERTION(result, "failed to remove frame");
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// Delete the next-in-flow frame
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nextInFlow->Destroy(aPresContext);
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#ifdef NS_DEBUG
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aChild->GetNextInFlow(&nextInFlow);
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NS_POSTCONDITION(nsnull == nextInFlow, "non null next-in-flow");
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#endif
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}
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/**
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* Push aFromChild and its next siblings to the next-in-flow. Change the
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* geometric parent of each frame that's pushed. If there is no next-in-flow
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* the frames are placed on the overflow list (and the geometric parent is
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* left unchanged).
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*
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* Updates the next-in-flow's child count. Does <b>not</b> update the
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* pusher's child count.
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*
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* @param aFromChild the first child frame to push. It is disconnected from
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* aPrevSibling
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* @param aPrevSibling aFromChild's previous sibling. Must not be null. It's
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* an error to push a parent's first child frame
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*/
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void
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nsContainerFrame::PushChildren(nsIFrame* aFromChild, nsIFrame* aPrevSibling)
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{
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NS_PRECONDITION(nsnull != aFromChild, "null pointer");
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NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child");
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#ifdef NS_DEBUG
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nsIFrame* prevNextSibling;
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aPrevSibling->GetNextSibling(&prevNextSibling);
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NS_PRECONDITION(prevNextSibling == aFromChild, "bad prev sibling");
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#endif
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// Disconnect aFromChild from its previous sibling
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aPrevSibling->SetNextSibling(nsnull);
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if (nsnull != mNextInFlow) {
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// XXX This is not a very good thing to do. If it gets removed
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// then remove the copy of this routine that doesn't do this from
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// nsInlineFrame.
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nsContainerFrame* nextInFlow = (nsContainerFrame*)mNextInFlow;
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// When pushing and pulling frames we need to check for whether any
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// views need to be reparented.
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for (nsIFrame* f = aFromChild; f; f->GetNextSibling(&f)) {
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nsHTMLContainerFrame::ReparentFrameView(f, this, mNextInFlow);
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}
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nextInFlow->mFrames.InsertFrames(mNextInFlow, nsnull, aFromChild);
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}
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else {
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// Add the frames to our overflow list
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NS_ASSERTION(mOverflowFrames.IsEmpty(), "bad overflow list");
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mOverflowFrames.SetFrames(aFromChild);
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}
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}
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/**
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* Moves any frames on the overflwo lists (the prev-in-flow's overflow list and
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* the receiver's overflow list) to the child list.
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*
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* Updates this frame's child count and content mapping.
|
|
*
|
|
* @return PR_TRUE if any frames were moved and PR_FALSE otherwise
|
|
*/
|
|
PRBool
|
|
nsContainerFrame::MoveOverflowToChildList()
|
|
{
|
|
PRBool result = PR_FALSE;
|
|
|
|
// Check for an overflow list with our prev-in-flow
|
|
nsContainerFrame* prevInFlow = (nsContainerFrame*)mPrevInFlow;
|
|
if (nsnull != prevInFlow) {
|
|
if (prevInFlow->mOverflowFrames.NotEmpty()) {
|
|
NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented.
|
|
for (nsIFrame* f = prevInFlow->mOverflowFrames.FirstChild(); f; f->GetNextSibling(&f)) {
|
|
nsHTMLContainerFrame::ReparentFrameView(f, prevInFlow, this);
|
|
}
|
|
mFrames.InsertFrames(this, nsnull, prevInFlow->mOverflowFrames);
|
|
result = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// It's also possible that we have an overflow list for ourselves
|
|
if (mOverflowFrames.NotEmpty()) {
|
|
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
|
|
mFrames.AppendFrames(nsnull, mOverflowFrames);
|
|
result = PR_TRUE;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Debugging
|
|
|
|
NS_IMETHODIMP
|
|
nsContainerFrame::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
nsIView* view;
|
|
GetView(&view);
|
|
if (nsnull != view) {
|
|
fprintf(out, " [view=%p]", view);
|
|
}
|
|
if (nsnull != mNextSibling) {
|
|
fprintf(out, " next=%p", mNextSibling);
|
|
}
|
|
if (nsnull != mPrevInFlow) {
|
|
fprintf(out, " prev-in-flow=%p", mPrevInFlow);
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
fprintf(out, " next-in-flow=%p", mNextInFlow);
|
|
}
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
fprintf(out, " [state=%08x]", mState);
|
|
}
|
|
fprintf(out, " sc=%p", mStyleContext);
|
|
|
|
// Output the children
|
|
nsIAtom* listName = nsnull;
|
|
PRInt32 listIndex = 0;
|
|
PRBool outputOneList = PR_FALSE;
|
|
do {
|
|
nsIFrame* kid;
|
|
FirstChild(listName, &kid);
|
|
if (nsnull != kid) {
|
|
if (outputOneList) {
|
|
IndentBy(out, aIndent);
|
|
}
|
|
outputOneList = PR_TRUE;
|
|
nsAutoString tmp;
|
|
if (nsnull != listName) {
|
|
listName->ToString(tmp);
|
|
fputs(tmp, out);
|
|
}
|
|
fputs("<\n", out);
|
|
while (nsnull != kid) {
|
|
kid->List(out, aIndent + 1);
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
}
|
|
NS_IF_RELEASE(listName);
|
|
GetAdditionalChildListName(listIndex++, &listName);
|
|
} while(nsnull != listName);
|
|
|
|
if (!outputOneList) {
|
|
fputs("<>\n", out);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsContainerFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
|
|
{
|
|
if (!aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
*aResult = sizeof(*this);
|
|
return NS_OK;
|
|
}
|
|
#endif
|