129 lines
3.1 KiB
C++
129 lines
3.1 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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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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static NS_DEFINE_IID(kIPresContextIID, NS_IPRESCONTEXT_IID);
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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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virtual PRBool IsPaginated();
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virtual nscoord GetPageWidth();
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virtual nscoord GetPageHeight();
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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*& aMedium)
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{
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aMedium = nsLayoutAtoms::print;
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NS_ADDREF(aMedium);
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return NS_OK;
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}
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PRBool
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PrintPreviewContext::IsPaginated()
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{
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return PR_TRUE;
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}
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nscoord
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PrintPreviewContext::GetPageWidth()
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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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return mVisibleArea.width - sbar - 2*100;
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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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return (nscoord) NS_INCHES_TO_TWIPS(7.5);
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}
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nscoord
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PrintPreviewContext::GetPageHeight()
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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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return mVisibleArea.height * 60 / 100;
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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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return (nscoord) NS_INCHES_TO_TWIPS(10);
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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(kIPresContextIID, (void **) aInstancePtrResult);
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}
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