зеркало из https://github.com/mozilla/pjs.git
278 строки
7.8 KiB
C++
278 строки
7.8 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 "nsCOMPtr.h"
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#include "nsHTMLReflowCommand.h"
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#include "nsHTMLParts.h"
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#include "nsIFrame.h"
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#include "nsIHTMLReflow.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIContent.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsHTMLIIDs.h"
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#include "nsFrame.h"
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static NS_DEFINE_IID(kIReflowCommandIID, NS_IREFLOWCOMMAND_IID);
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nsresult
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NS_NewHTMLReflowCommand(nsIReflowCommand** aInstancePtrResult,
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nsIFrame* aTargetFrame,
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nsIReflowCommand::ReflowType aReflowType,
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nsIFrame* aChildFrame,
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nsIAtom* aAttribute)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsHTMLReflowCommand* cmd = new nsHTMLReflowCommand(aTargetFrame, aReflowType, aChildFrame, aAttribute);
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if (nsnull == cmd) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return cmd->QueryInterface(kIReflowCommandIID, (void**)aInstancePtrResult);
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}
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// Construct a reflow command given a target frame, reflow command type,
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// and optional child frame
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nsHTMLReflowCommand::nsHTMLReflowCommand(nsIFrame* aTargetFrame,
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ReflowType aReflowType,
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nsIFrame* aChildFrame,
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nsIAtom* aAttribute)
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: mType(aReflowType), mTargetFrame(aTargetFrame), mChildFrame(aChildFrame),
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mPrevSiblingFrame(nsnull),
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mAttribute(aAttribute),
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mListName(nsnull)
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{
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NS_PRECONDITION(mTargetFrame != nsnull, "null target frame");
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if (nsnull!=mAttribute)
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NS_ADDREF(mAttribute);
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NS_INIT_REFCNT();
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}
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nsHTMLReflowCommand::~nsHTMLReflowCommand()
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{
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NS_IF_RELEASE(mAttribute);
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NS_IF_RELEASE(mListName);
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}
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NS_IMPL_ISUPPORTS(nsHTMLReflowCommand, kIReflowCommandIID);
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nsIFrame* nsHTMLReflowCommand::GetContainingBlock(nsIFrame* aFloater) const
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{
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nsIFrame* containingBlock;
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aFloater->GetParent(&containingBlock);
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return containingBlock;
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}
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void nsHTMLReflowCommand::BuildPath()
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{
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mPath.Clear();
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// Floating frames are handled differently. The path goes from the target
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// frame to the containing block, and then up the hierarchy
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const nsStyleDisplay* display;
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mTargetFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_NONE != display->mFloats) {
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mPath.AppendElement((void*)mTargetFrame);
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for (nsIFrame* f = GetContainingBlock(mTargetFrame); nsnull != f; f->GetParent(&f)) {
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mPath.AppendElement((void*)f);
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}
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} else {
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for (nsIFrame* f = mTargetFrame; nsnull != f; f->GetParent(&f)) {
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mPath.AppendElement((void*)f);
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}
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}
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}
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NS_IMETHODIMP nsHTMLReflowCommand::Dispatch(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsSize& aMaxSize,
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nsIRenderingContext& aRendContext)
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{
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// Build the path from the target frame (index 0) to the root frame
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BuildPath();
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// Send an incremental reflow notification to the root frame
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nsIFrame* root = (nsIFrame*)mPath[mPath.Count() - 1];
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#ifdef NS_DEBUG
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nsCOMPtr<nsIPresShell> shell;
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aPresContext.GetShell(getter_AddRefs(shell));
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if (shell) {
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nsIFrame* rootFrame;
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shell->GetRootFrame(&rootFrame);
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NS_ASSERTION(rootFrame == root, "bad root frame");
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}
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#endif
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if (nsnull != root) {
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mPath.RemoveElementAt(mPath.Count() - 1);
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nsHTMLReflowState reflowState(aPresContext, root, *this,
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&aRendContext, aMaxSize);
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nsIHTMLReflow* htmlReflow;
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nsReflowStatus status;
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if (NS_OK == root->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
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htmlReflow->Reflow(aPresContext, aDesiredSize, reflowState, status);
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetNext(nsIFrame*& aNextFrame, PRBool aRemove)
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{
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PRInt32 count = mPath.Count();
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aNextFrame = nsnull;
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if (count > 0) {
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aNextFrame = (nsIFrame*)mPath[count - 1];
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if (aRemove) {
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mPath.RemoveElementAt(count - 1);
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetTarget(nsIFrame*& aTargetFrame) const
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{
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aTargetFrame = mTargetFrame;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::SetTarget(nsIFrame* aTargetFrame)
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{
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mTargetFrame = aTargetFrame;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetType(ReflowType& aReflowType) const
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{
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aReflowType = mType;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetAttribute(nsIAtom *& aAttribute) const
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{
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aAttribute = mAttribute;
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if (nsnull!=aAttribute)
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NS_ADDREF(aAttribute);
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetChildFrame(nsIFrame*& aChildFrame) const
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{
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aChildFrame = mChildFrame;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetChildListName(nsIAtom*& aListName) const
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{
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aListName = mListName;
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NS_IF_ADDREF(aListName);
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::SetChildListName(nsIAtom* aListName)
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{
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mListName = aListName;
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NS_IF_ADDREF(mListName);
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::GetPrevSiblingFrame(nsIFrame*& aSiblingFrame) const
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{
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aSiblingFrame = mPrevSiblingFrame;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLReflowCommand::List(FILE* out) const
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{
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#ifdef DEBUG
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static const char* kReflowCommandType[] = {
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"ContentChanged",
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"StyleChanged",
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"PullupReflow",
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"PushReflow",
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"CheckPullupReflow",
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"ReflowDirty",
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"UserDefined",
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};
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fprintf(out, "ReflowCommand@%p[%s]:",
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this, kReflowCommandType[mType]);
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if (mTargetFrame) {
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fprintf(out, " target=");
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nsFrame::ListTag(out, mTargetFrame);
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}
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if (mChildFrame) {
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fprintf(out, " child=");
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nsFrame::ListTag(out, mChildFrame);
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}
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if (mPrevSiblingFrame) {
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fprintf(out, " prevSibling=");
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nsFrame::ListTag(out, mPrevSiblingFrame);
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}
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if (mAttribute) {
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fprintf(out, " attr=");
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nsAutoString attr;
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mAttribute->ToString(attr);
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fputs(attr, out);
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}
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if (mListName) {
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fprintf(out, " list=");
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nsAutoString attr;
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mListName->ToString(attr);
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fputs(attr, out);
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}
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fprintf(out, "\n");
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// Show the path, but without using mPath which is in an undefined
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// state at this point.
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if (mTargetFrame) {
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// Floating frames are handled differently. The path goes from the target
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// frame to the containing block, and then up the hierarchy
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PRBool didOne = PR_FALSE;
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nsIFrame* start = mTargetFrame;
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const nsStyleDisplay* display;
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mTargetFrame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&) display);
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if (NS_STYLE_FLOAT_NONE != display->mFloats) {
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start = GetContainingBlock(mTargetFrame);
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}
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for (nsIFrame* f = start; nsnull != f; f->GetParent(&f)) {
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if (f != mTargetFrame) {
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fprintf(out, " ");
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nsFrame::ListTag(out, f);
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didOne = PR_TRUE;
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}
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}
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if (didOne) {
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fprintf(out, "\n");
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}
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}
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#endif
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return NS_OK;
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}
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