зеркало из https://github.com/mozilla/gecko-dev.git
227 строки
7.4 KiB
C++
227 строки
7.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsPageContentFrame.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 "nsIRenderingContext.h"
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#include "nsHTMLAtoms.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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#include "nsIDeviceContext.h"
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#include "nsReadableUtils.h"
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#include "nsIPrintPreviewContext.h"
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#include "nsSimplePageSequence.h"
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#include "nsIView.h"
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#if defined(DEBUG_rods) || defined(DEBUG_dcone)
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//#define DEBUG_PRINTING
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#endif
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nsresult
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NS_NewPageContentFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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nsPageContentFrame* it = new (aPresShell) nsPageContentFrame;
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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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nsPageContentFrame::nsPageContentFrame() :
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mClipRect(-1, -1, -1, -1)
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{
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}
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NS_IMETHODIMP nsPageContentFrame::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("nsPageContentFrame", aReflowState.reason);
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DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
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aStatus = NS_FRAME_COMPLETE; // initialize out parameter
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if (eReflowReason_Incremental != aReflowState.reason) {
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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, maxSize);
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mPD->mPageContentSize = aReflowState.availableWidth;
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// Reflow the page content area to get the child's desired size
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ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
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// The document element's background should cover the entire canvas, so
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// take into account the combined area and any space taken up by
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// absolutely positioned elements
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nsMargin border(0,0,0,0);
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nsMargin padding(0,0,0,0);
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nsFrameState kidState;
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// Ignore the return values for these
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// Typically they are zero and if they fail
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// we should keep going anyway, there impact is small
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kidReflowState.mStyleBorder->GetBorder(border);
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kidReflowState.mStylePadding->GetPadding(padding);
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frame->GetFrameState(&kidState);
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// First check the combined area
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if (NS_FRAME_OUTSIDE_CHILDREN & kidState) {
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// The background covers the content area and padding area, so check
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// for children sticking outside the child frame's padding edge
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nscoord paddingEdgeX = aDesiredSize.width - border.right - padding.right;
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if (aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) {
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mPD->mPageContentXMost = aDesiredSize.mOverflowArea.XMost() + border.right + padding.right;
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}
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}
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// Place and size the child
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FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, 0, 0, 0);
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#ifdef NS_DEBUG
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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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#endif
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#ifdef DEBUG_PRINTING
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nsRect r;
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frame->GetRect(r);
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printf("PCF: Area Frame %p Bounds: %5d,%5d,%5d,%5d\n", frame, r.x, r.y, r.width, r.height);
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nsIView* view;
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frame->GetView(aPresContext, &view);
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if (view) {
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view->GetBounds(r);
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printf("PCF: Area Frame View Bounds: %5d,%5d,%5d,%5d\n", r.x, r.y, r.width, r.height);
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} else {
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printf("PCF: Area Frame View Bounds: NO VIEW\n");
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}
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#endif
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}
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// Return our desired size
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aDesiredSize.width = aReflowState.availableWidth;
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if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
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aDesiredSize.height = aReflowState.availableHeight;
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}
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}
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPageContentFrame::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::pageContentFrame;
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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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nsPageContentFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("PageContent"), aResult);
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}
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#endif
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NS_IMETHODIMP
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nsPageContentFrame::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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//------------------------------------------------------------------------------
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NS_IMETHODIMP
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nsPageContentFrame::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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PRUint32 aFlags)
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{
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aRenderingContext.PushState();
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nsRect rect;
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if (mClipRect.width != -1 || mClipRect.height != -1) {
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rect = mClipRect;
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} else {
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rect = mRect;
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rect.x = 0;
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rect.y = 0;
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}
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PRBool clipEmpty;
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aRenderingContext.SetClipRect(rect, nsClipCombine_kReplace, clipEmpty);
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nsresult rv = nsContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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#if defined(DEBUG_rods) || defined(DEBUG_dcone)
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if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
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nsRect r = mRect;
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r.x = 0;
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r.y = 0;
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aRenderingContext.SetColor(NS_RGB(0, 0, 0));
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aRenderingContext.DrawRect(r);
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}
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#endif
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aRenderingContext.PopState(clipEmpty);
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return rv;
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}
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