зеркало из https://github.com/mozilla/gecko-dev.git
345 строки
11 KiB
C++
345 строки
11 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 "nsAreaFrame.h"
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#include "nsBlockBandData.h"
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#include "nsIReflowCommand.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIViewManager.h"
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#include "nsSpaceManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsIView.h"
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#include "nsHTMLIIDs.h"
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#include "nsHTMLValue.h"
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#include "nsHTMLParts.h"
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#include "nsLayoutAtoms.h"
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#include "nsISizeOfHandler.h"
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#undef NOISY_MAX_ELEMENT_SIZE
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#undef NOISY_SPACEMANAGER
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#undef NOISY_FINAL_SIZE
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nsresult
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NS_NewAreaFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
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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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nsAreaFrame* it = new (aPresShell) nsAreaFrame;
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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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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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nsAreaFrame::nsAreaFrame()
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{
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}
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/////////////////////////////////////////////////////////////////////////////
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// nsIFrame
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NS_IMETHODIMP
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nsAreaFrame::Destroy(nsIPresContext* aPresContext)
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{
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mAbsoluteContainer.DestroyFrames(this, aPresContext);
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return nsBlockFrame::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsAreaFrame::SetInitialChildList(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
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} else {
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rv = nsBlockFrame::SetInitialChildList(aPresContext, aListName, aChildList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName,
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aFrameList);
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} else {
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rv = nsBlockFrame::AppendFrames(aPresContext, aPresShell, aListName,
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aFrameList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName,
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aPrevFrame, aFrameList);
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} else {
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rv = nsBlockFrame::InsertFrames(aPresContext, aPresShell, aListName,
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aPrevFrame, aFrameList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame);
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} else {
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rv = nsBlockFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::GetAdditionalChildListName(PRInt32 aIndex,
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nsIAtom** aListName) const
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{
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NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
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if (aIndex <= NS_BLOCK_FRAME_LAST_LIST_INDEX) {
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return nsBlockFrame::GetAdditionalChildListName(aIndex, aListName);
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}
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*aListName = nsnull;
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if (NS_AREA_FRAME_ABSOLUTE_LIST_INDEX == aIndex) {
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*aListName = nsLayoutAtoms::absoluteList;
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NS_ADDREF(*aListName);
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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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nsAreaFrame::FirstChild(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame** aFirstChild) const
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{
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NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
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if (aListName == nsLayoutAtoms::absoluteList) {
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return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild);
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}
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return nsBlockFrame::FirstChild(aPresContext, aListName, aFirstChild);
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}
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static void
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CalculateContainingBlock(const nsHTMLReflowState& aReflowState,
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nscoord aFrameWidth,
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nscoord aFrameHeight,
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nscoord& aContainingBlockWidth,
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nscoord& aContainingBlockHeight)
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{
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aContainingBlockWidth = -1; // have reflow state calculate
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aContainingBlockHeight = -1; // have reflow state calculate
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// The issue there is that for a 'height' of 'auto' the reflow state code
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// won't know how to calculate the containing block height because it's
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// calculated bottom up. We don't really want to do this for the initial
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// containing block so that's why we have the check for if the element
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// is absolutely or relatively positioned
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if (aReflowState.mStylePosition->IsAbsolutelyPositioned() ||
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(NS_STYLE_POSITION_RELATIVE == aReflowState.mStylePosition->mPosition)) {
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aContainingBlockWidth = aFrameWidth;
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aContainingBlockHeight = aFrameHeight;
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// Containing block is relative to the padding edge
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nsMargin border;
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if (!aReflowState.mStyleSpacing->GetBorder(border)) {
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NS_NOTYETIMPLEMENTED("percentage border");
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}
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aContainingBlockWidth -= border.left + border.right;
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aContainingBlockHeight -= border.top + border.bottom;
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}
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}
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NS_IMETHODIMP
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nsAreaFrame::Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsAreaFrame::Reflow: maxSize=%d,%d reason=%d",
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aReflowState.availableWidth,
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aReflowState.availableHeight,
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aReflowState.reason));
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nsresult rv = NS_OK;
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// See if it's an incremental reflow command
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if (eReflowReason_Incremental == aReflowState.reason) {
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// Give the absolute positioning code a chance to handle it
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nscoord containingBlockWidth;
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nscoord containingBlockHeight;
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PRBool handled;
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nsRect childBounds;
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CalculateContainingBlock(aReflowState, mRect.width, mRect.height,
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containingBlockWidth, containingBlockHeight);
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mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
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containingBlockWidth, containingBlockHeight,
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handled, childBounds);
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// If the incremental reflow command was handled by the absolute positioning
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// code, then we're all done
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if (handled) {
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// Just return our current size as our desired size.
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// XXX We need to know the overflow area for the flowed content, and
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// we don't have a way to get that currently so for the time being pretend
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// a resize reflow occured
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#if 0
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aMetrics.width = mRect.width;
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aMetrics.height = mRect.height;
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aMetrics.ascent = mRect.height;
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aMetrics.descent = 0;
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// Whether or not we're complete hasn't changed
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aStatus = (nsnull != mNextInFlow) ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
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#else
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nsHTMLReflowState reflowState(aReflowState);
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reflowState.reason = eReflowReason_Resize;
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reflowState.reflowCommand = nsnull;
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rv = nsBlockFrame::Reflow(aPresContext, aMetrics, reflowState, aStatus);
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#endif
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// Factor the absolutely positioned child bounds into the overflow area
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aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
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// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
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if ((aMetrics.mOverflowArea.x < 0) ||
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(aMetrics.mOverflowArea.y < 0) ||
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(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
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(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
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mState |= NS_FRAME_OUTSIDE_CHILDREN;
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} else {
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mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
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}
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return rv;
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}
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}
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// Let the block frame do its reflow first
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rv = nsBlockFrame::Reflow(aPresContext, aMetrics, aReflowState, aStatus);
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// Let the absolutely positioned container reflow any absolutely positioned
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// child frames that need to be reflowed, e.g., elements with a percentage
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// based width/height
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if (NS_SUCCEEDED(rv)) {
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nscoord containingBlockWidth;
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nscoord containingBlockHeight;
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nsRect childBounds;
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CalculateContainingBlock(aReflowState, aMetrics.width, aMetrics.height,
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containingBlockWidth, containingBlockHeight);
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rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
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containingBlockWidth, containingBlockHeight,
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childBounds);
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// Factor the absolutely positioned child bounds into the overflow area
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aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
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// Make sure the NS_FRAME_OUTSIDE_CHILDREN flag is set correctly
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if ((aMetrics.mOverflowArea.x < 0) ||
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(aMetrics.mOverflowArea.y < 0) ||
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(aMetrics.mOverflowArea.XMost() > aMetrics.width) ||
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(aMetrics.mOverflowArea.YMost() > aMetrics.height)) {
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mState |= NS_FRAME_OUTSIDE_CHILDREN;
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} else {
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mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
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}
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}
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#ifdef NOISY_MAX_ELEMENT_SIZE
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ListTag(stdout);
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printf(": maxElementSize=%d,%d desiredSize=%d,%d\n",
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aMetrics.maxElementSize ? aMetrics.maxElementSize->width : 0,
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aMetrics.maxElementSize ? aMetrics.maxElementSize->height : 0,
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aMetrics.width, aMetrics.height);
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#endif
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::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::areaFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Diagnostics
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#ifdef NS_DEBUG
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NS_IMETHODIMP
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nsAreaFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Area", aResult);
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}
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NS_IMETHODIMP
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nsAreaFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
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{
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if (!aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsBlockFrame::SizeOf(aHandler, aResult);
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*aResult += sizeof(*this) - sizeof(nsBlockFrame);
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return NS_OK;
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}
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#endif
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