зеркало из https://github.com/mozilla/gecko-dev.git
178 строки
6.3 KiB
C++
178 строки
6.3 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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* Roland Mainz <Roland.Mainz@informatik.med.uni-giessen.de>
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*
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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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#ifndef nsDeviceContext_h___
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#define nsDeviceContext_h___
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#include "nsIDeviceContext.h"
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#include "nsIDeviceContextSpec.h"
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#include "nsCOMPtr.h"
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#include "nsIAtom.h"
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#include "nsVoidArray.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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#include "nsWeakReference.h"
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#include "nsComObsolete.h"
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class nsIImageRequest;
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class nsHashtable;
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class nsFontCache
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{
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public:
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nsFontCache();
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virtual ~nsFontCache();
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virtual nsresult Init(nsIDeviceContext* aContext);
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virtual nsresult GetDeviceContext(nsIDeviceContext *&aContext) const;
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virtual nsresult GetMetricsFor(const nsFont& aFont, nsIAtom* aLangGroup,
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nsIFontMetrics *&aMetrics);
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nsresult FontMetricsDeleted(const nsIFontMetrics* aFontMetrics);
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nsresult Compact();
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nsresult Flush();
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/* printer device context classes may create their own
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* subclasses of nsFontCache (and override this method) and override
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* DeviceContextImpl::CreateFontCache (see bug 81311).
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*/
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virtual nsresult CreateFontMetricsInstance(nsIFontMetrics** fm);
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protected:
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nsVoidArray mFontMetrics;
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nsIDeviceContext *mContext; // we do not addref this since
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// ownership is implied. MMP.
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};
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT
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class NS_GFX DeviceContextImpl : public nsIDeviceContext,
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public nsIObserver,
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public nsSupportsWeakReference
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{
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public:
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DeviceContextImpl();
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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NS_IMETHOD Init(nsNativeWidget aWidget);
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NS_IMETHOD CreateRenderingContext(nsIView *aView, nsIRenderingContext *&aContext);
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NS_IMETHOD CreateRenderingContext(nsIWidget *aWidget, nsIRenderingContext *&aContext);
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NS_IMETHOD CreateRenderingContext(nsIRenderingContext *&aContext){return NS_ERROR_NOT_IMPLEMENTED;}
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NS_IMETHOD CreateRenderingContext(nsDrawingSurface aSurface, nsIRenderingContext *&aContext);
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NS_IMETHOD CreateRenderingContextInstance(nsIRenderingContext *&aContext);
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NS_IMETHOD GetCanonicalPixelScale(float &aScale) const;
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NS_IMETHOD SetCanonicalPixelScale(float aScale);
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NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIAtom* aLangGroup,
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nsIFontMetrics*& aMetrics);
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NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIFontMetrics*& aMetrics);
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NS_IMETHOD SetZoom(float aZoom);
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NS_IMETHOD GetZoom(float &aZoom) const;
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NS_IMETHOD SetTextZoom(float aTextZoom);
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NS_IMETHOD GetTextZoom(float &aTextZoom) const;
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NS_IMETHOD FirstExistingFont(const nsFont& aFont, nsString& aFaceName);
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NS_IMETHOD GetLocalFontName(const nsString& aFaceName, nsString& aLocalName,
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PRBool& aAliased);
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NS_IMETHOD CreateFontCache();
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NS_IMETHOD FontMetricsDeleted(const nsIFontMetrics* aFontMetrics);
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NS_IMETHOD FlushFontCache(void);
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NS_IMETHOD GetDepth(PRUint32& aDepth);
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NS_IMETHOD GetPaletteInfo(nsPaletteInfo& aPaletteInfo);
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NS_IMETHOD PrepareDocument(PRUnichar * aTitle,
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PRUnichar* aPrintToFileName) { return NS_OK; }
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NS_IMETHOD AbortDocument(void) { return NS_OK; }
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#ifdef NS_PRINT_PREVIEW
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NS_IMETHOD SetAltDevice(nsIDeviceContext* aAltDC);
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NS_IMETHOD GetAltDevice(nsIDeviceContext** aAltDC) { *aAltDC = mAltDC.get(); NS_IF_ADDREF(*aAltDC); return NS_OK;}
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NS_IMETHOD SetUseAltDC(PRUint8 aValue, PRBool aOn);
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#endif
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private:
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/* Helper methods for |CreateRenderingContext|&co. */
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nsresult InitRenderingContext(nsIRenderingContext *aContext, nsIWidget *aWindow);
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nsresult InitRenderingContext(nsIRenderingContext *aContext, nsDrawingSurface aSurface);
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protected:
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virtual ~DeviceContextImpl();
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void CommonInit(void);
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nsresult CreateIconILGroupContext();
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virtual nsresult CreateFontAliasTable();
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nsresult AliasFont(const nsString& aFont,
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const nsString& aAlias, const nsString& aAltAlias,
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PRBool aForceAlias);
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void GetLocaleLangGroup(void);
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nsFontCache *mFontCache;
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nsCOMPtr<nsIAtom> mLocaleLangGroup; // XXX temp fix for performance bug - erik
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float mZoom;
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float mTextZoom;
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nsHashtable* mFontAliasTable;
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float mCPixelScale;
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#ifdef NS_PRINT_PREVIEW
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nsCOMPtr<nsIDeviceContext> mAltDC;
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PRUint8 mUseAltDC;
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#endif
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public:
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nsNativeWidget mWidget;
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#ifdef NS_DEBUG
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PRBool mInitialized;
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#endif
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};
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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
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#endif /* nsDeviceContext_h___ */
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