gecko-dev/layout/generic/nsPageContentFrame.cpp

200 строки
6.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsPageContentFrame.h"
#include "nsHTMLParts.h"
#include "nsIContent.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsIRenderingContext.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIStyleSet.h"
#include "nsIPresShell.h"
#include "nsIDeviceContext.h"
#include "nsReadableUtils.h"
#include "nsIPrintPreviewContext.h"
#include "nsIView.h"
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
//#define DEBUG_PRINTING
#endif
nsresult
NS_NewPageContentFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
nsPageContentFrame* it = new (aPresShell) nsPageContentFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsPageContentFrame::nsPageContentFrame() :
mClipRect(-1, -1, -1, -1)
{
}
NS_IMETHODIMP nsPageContentFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
if (eReflowReason_Incremental != aReflowState.reason) {
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
// Get the child's desired size
ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
// Place and size the child
FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, 0, 0, 0);
#ifdef NS_DEBUG
// Is the frame complete?
if (NS_FRAME_IS_COMPLETE(aStatus)) {
nsIFrame* childNextInFlow;
frame->GetNextInFlow(&childNextInFlow);
NS_ASSERTION(nsnull == childNextInFlow, "bad child flow list");
}
#endif
#ifdef DEBUG_PRINTING
nsRect r;
frame->GetRect(r);
printf("PCF: Area Frame %p Bounds: %5d,%5d,%5d,%5d\n", frame, r.x, r.y, r.width, r.height);
nsIView* view;
frame->GetView(aPresContext, &view);
if (view) {
view->GetBounds(r);
printf("PCF: Area Frame View Bounds: %5d,%5d,%5d,%5d\n", r.x, r.y, r.width, r.height);
} else {
printf("PCF: Area Frame View Bounds: NO VIEW\n");
}
#endif
}
// Return our desired size
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
aDesiredSize.height = aReflowState.availableHeight;
}
}
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
NS_IMETHODIMP
nsPageContentFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::pageContentFrame;
NS_ADDREF(*aType);
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsPageContentFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("PageContent"), aResult);
}
#endif
NS_IMETHODIMP
nsPageContentFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
//------------------------------------------------------------------------------
NS_IMETHODIMP
nsPageContentFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
aRenderingContext.PushState();
nsRect rect;
if (mClipRect.width != -1 || mClipRect.height != -1) {
rect = mClipRect;
} else {
rect = mRect;
rect.x = 0;
rect.y = 0;
}
PRBool clipEmpty;
aRenderingContext.SetClipRect(rect, nsClipCombine_kReplace, clipEmpty);
nsresult rv = nsContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
nsRect r = mRect;
r.x = 0;
r.y = 0;
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
aRenderingContext.DrawRect(r);
}
#endif
aRenderingContext.PopState(clipEmpty);
return rv;
}