a6e0d47c5a
Bug 61274, r=buster sr=waterson git-svn-id: svn://10.0.0.236/trunk@84377 18797224-902f-48f8-a5cc-f745e15eee43
155 lines
3.7 KiB
C++
155 lines
3.7 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 "nsPresContext.h"
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#include "nsIDeviceContext.h"
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#include "nsUnitConversion.h"
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#include "nsIView.h"
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#include "nsIWidget.h"
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#include "nsGfxCIID.h"
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#include "nsLayoutAtoms.h"
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#include "prlog.h"
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class PrintPreviewContext : public nsPresContext {
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public:
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PrintPreviewContext();
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~PrintPreviewContext();
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NS_IMETHOD GetMedium(nsIAtom** aMedium);
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NS_IMETHOD IsPaginated(PRBool* aResult);
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NS_IMETHOD GetPageWidth(nscoord* aResult);
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NS_IMETHOD GetPageHeight(nscoord* aResult);
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#ifdef NS_DEBUG
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static PRBool UseFakePageSize();
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#endif
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};
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#ifdef NS_DEBUG
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PRBool
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PrintPreviewContext::UseFakePageSize()
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{
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static PRLogModuleInfo* pageSizeLM;
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static PRBool useFakePageSize = PR_FALSE;
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if (nsnull == pageSizeLM) {
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pageSizeLM = PR_NewLogModule("pagesize");
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if (nsnull != pageSizeLM) {
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useFakePageSize = 0 != pageSizeLM->level;
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}
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}
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return useFakePageSize;
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}
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#endif
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PrintPreviewContext::PrintPreviewContext()
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{
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}
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PrintPreviewContext::~PrintPreviewContext()
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{
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}
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NS_IMETHODIMP
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PrintPreviewContext::GetMedium(nsIAtom** aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = nsLayoutAtoms::print;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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NS_IMETHODIMP
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PrintPreviewContext::IsPaginated(PRBool* aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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*aResult = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHODIMP
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PrintPreviewContext::GetPageWidth(nscoord* aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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#ifdef NS_DEBUG
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if (UseFakePageSize()) {
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// For testing purposes make the page width smaller than the visible
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// area
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float sbWidth, sbHeight;
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mDeviceContext->GetScrollBarDimensions(sbWidth, sbHeight);
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nscoord sbar = NSToCoordRound(sbWidth);
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*aResult = mVisibleArea.width - sbar - 2*100;
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return NS_OK;
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}
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#endif
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// XXX assumes a 1/2 margin around all sides
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*aResult = (nscoord) NS_INCHES_TO_TWIPS(7.5);
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return NS_OK;
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}
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NS_IMETHODIMP
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PrintPreviewContext::GetPageHeight(nscoord* aResult)
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{
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NS_PRECONDITION(nsnull != aResult, "null ptr");
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if (nsnull == aResult) {
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return NS_ERROR_NULL_POINTER;
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}
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#ifdef NS_DEBUG
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if (UseFakePageSize()) {
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// For testing purposes make the page height 60% of the visible area
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*aResult = mVisibleArea.height * 60 / 100;
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return NS_OK;
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}
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#endif
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// XXX assumes a 1/2 margin around all sides
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*aResult = (nscoord) NS_INCHES_TO_TWIPS(10);
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return NS_OK;
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}
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NS_LAYOUT nsresult
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NS_NewPrintPreviewContext(nsIPresContext** aInstancePtrResult)
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{
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if (aInstancePtrResult == nsnull) {
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return NS_ERROR_NULL_POINTER;
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}
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PrintPreviewContext *it = new PrintPreviewContext();
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if (it == nsnull) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return it->QueryInterface(NS_GET_IID(nsIPresContext), (void **) aInstancePtrResult);
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}
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