mirror of
https://github.com/mozilla/gecko-dev.git
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176 lines
5.6 KiB
C++
176 lines
5.6 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsPageFrame.h"
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#include "nsHTMLParts.h"
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#include "nsIContent.h"
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#include "nsIPresContext.h"
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#include "nsIStyleContext.h"
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#include "nsIReflowCommand.h"
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#include "nsIRenderingContext.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLIIDs.h"
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#include "nsLayoutAtoms.h"
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#include "nsIStyleSet.h"
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#include "nsIPresShell.h"
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nsresult
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NS_NewPageFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsPageFrame* it = new (aPresShell) nsPageFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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nsPageFrame::nsPageFrame()
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{
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}
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NS_METHOD nsPageFrame::Reflow(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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DO_GLOBAL_REFLOW_COUNT("nsPageFrame", aReflowState.reason);
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aStatus = NS_FRAME_COMPLETE; // initialize out parameter
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if (eReflowReason_Incremental == aReflowState.reason) {
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// We don't expect the target of the reflow command to be page frame
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#ifdef NS_DEUG
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NS_ASSERTION(nsnull != aReflowState.reflowCommand, "null reflow command");
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nsIFrame* target;
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aReflowState.reflowCommand->GetTarget(target);
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NS_ASSERTION(target != this, "page frame is reflow command target");
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#endif
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// Verify the next reflow command frame is our one and only child frame
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nsIFrame* next;
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aReflowState.reflowCommand->GetNext(next);
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NS_ASSERTION(next == mFrames.FirstChild(), "bad reflow frame");
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// Dispatch the reflow command to our frame
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nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
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nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
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mFrames.FirstChild(), maxSize);
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kidReflowState.isTopOfPage = PR_TRUE;
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ReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
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kidReflowState, 0, 0, 0, aStatus);
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// Place and size the child. Make sure the child is at least as
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// tall as our max size (the containing window)
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if (aDesiredSize.height < aReflowState.availableHeight) {
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aDesiredSize.height = aReflowState.availableHeight;
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}
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FinishReflowChild(mFrames.FirstChild(), aPresContext, aDesiredSize,
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0, 0, 0);
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} else {
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// Do we have any children?
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// XXX We should use the overflow list instead...
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if (mFrames.IsEmpty() && (nsnull != mPrevInFlow)) {
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nsPageFrame* prevPage = (nsPageFrame*)mPrevInFlow;
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nsIFrame* prevLastChild = prevPage->mFrames.LastChild();
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// Create a continuing child of the previous page's last child
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nsIPresShell* presShell;
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nsIStyleSet* styleSet;
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nsIFrame* newFrame;
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aPresContext->GetShell(&presShell);
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presShell->GetStyleSet(&styleSet);
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NS_RELEASE(presShell);
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styleSet->CreateContinuingFrame(aPresContext, prevLastChild, this, &newFrame);
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NS_RELEASE(styleSet);
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mFrames.SetFrames(newFrame);
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}
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// Resize our frame allowing it only to be as big as we are
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// XXX Pay attention to the page's border and padding...
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if (mFrames.NotEmpty()) {
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nsIFrame* frame = mFrames.FirstChild();
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nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
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nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame,
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maxSize);
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kidReflowState.isTopOfPage = PR_TRUE;
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// Get the child's desired size
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ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
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// Make sure the child is at least as tall as our max size (the containing window)
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if (aDesiredSize.height < aReflowState.availableHeight) {
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aDesiredSize.height = aReflowState.availableHeight;
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}
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// Place and size the child
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FinishReflowChild(frame, aPresContext, aDesiredSize, 0, 0, 0);
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// Is the frame complete?
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if (NS_FRAME_IS_COMPLETE(aStatus)) {
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nsIFrame* childNextInFlow;
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frame->GetNextInFlow(&childNextInFlow);
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NS_ASSERTION(nsnull == childNextInFlow, "bad child flow list");
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}
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}
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// Return our desired size
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aDesiredSize.width = aReflowState.availableWidth;
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aDesiredSize.height = aReflowState.availableHeight;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPageFrame::GetFrameType(nsIAtom** aType) const
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{
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NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
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*aType = nsLayoutAtoms::pageFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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#ifdef DEBUG
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NS_IMETHODIMP
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nsPageFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Page", aResult);
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}
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#endif
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NS_IMETHODIMP
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nsPageFrame::IsPercentageBase(PRBool& aBase) const
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{
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aBase = PR_TRUE;
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return NS_OK;
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}
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