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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla 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/MPL/
- *
- * 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):
- * Roland Mainz <Roland.Mainz@informatik.med.uni-giessen.de>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of 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 MPL, 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 MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef nsDeviceContext_h___
- #define nsDeviceContext_h___
-
- #include "nsIDeviceContext.h"
- #include "nsIDeviceContextSpec.h"
- #include "nsCOMPtr.h"
- #include "nsIAtom.h"
- #include "nsVoidArray.h"
- #include "nsIObserver.h"
- #include "nsIObserverService.h"
- #include "nsWeakReference.h"
- #include "gfxCore.h"
-
- class nsIImageRequest;
- class nsHashtable;
-
- class NS_GFX nsFontCache
- {
- public:
- nsFontCache();
- virtual ~nsFontCache();
-
- virtual nsresult Init(nsIDeviceContext* aContext);
- virtual nsresult GetDeviceContext(nsIDeviceContext *&aContext) const;
- virtual nsresult GetMetricsFor(const nsFont& aFont, nsIAtom* aLangGroup,
- nsIFontMetrics *&aMetrics);
-
- nsresult FontMetricsDeleted(const nsIFontMetrics* aFontMetrics);
- nsresult Compact();
- nsresult Flush();
- /* printer device context classes may create their own
- * subclasses of nsFontCache (and override this method) and override
- * DeviceContextImpl::CreateFontCache (see bug 81311).
- */
- virtual nsresult CreateFontMetricsInstance(nsIFontMetrics** fm);
-
- protected:
- nsVoidArray mFontMetrics;
- nsIDeviceContext *mContext; // we do not addref this since
- // ownership is implied. MMP.
- };
-
- #undef IMETHOD_VISIBILITY
- #define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT
-
- class NS_GFX DeviceContextImpl : public nsIDeviceContext,
- public nsIObserver,
- public nsSupportsWeakReference
- {
- public:
- DeviceContextImpl();
-
- NS_DECL_ISUPPORTS
- NS_DECL_NSIOBSERVER
-
- NS_IMETHOD Init(nsNativeWidget aWidget);
-
- NS_IMETHOD CreateRenderingContext(nsIView *aView, nsIRenderingContext *&aContext);
- NS_IMETHOD CreateRenderingContext(nsIWidget *aWidget, nsIRenderingContext *&aContext);
- NS_IMETHOD CreateRenderingContext(nsIRenderingContext *&aContext){return NS_ERROR_NOT_IMPLEMENTED;}
- NS_IMETHOD CreateRenderingContext(nsIDrawingSurface* aSurface, nsIRenderingContext *&aContext);
- NS_IMETHOD CreateRenderingContextInstance(nsIRenderingContext *&aContext);
-
- NS_IMETHOD GetCanonicalPixelScale(float &aScale) const;
- NS_IMETHOD SetCanonicalPixelScale(float aScale);
-
- NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIAtom* aLangGroup,
- nsIFontMetrics*& aMetrics);
- NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIFontMetrics*& aMetrics);
-
- NS_IMETHOD SetZoom(float aZoom);
- NS_IMETHOD GetZoom(float &aZoom) const;
-
- NS_IMETHOD FirstExistingFont(const nsFont& aFont, nsString& aFaceName);
-
- NS_IMETHOD GetLocalFontName(const nsString& aFaceName, nsString& aLocalName,
- PRBool& aAliased);
-
- NS_IMETHOD CreateFontCache();
- NS_IMETHOD FontMetricsDeleted(const nsIFontMetrics* aFontMetrics);
- NS_IMETHOD FlushFontCache(void);
-
- NS_IMETHOD GetDepth(PRUint32& aDepth);
-
- NS_IMETHOD GetPaletteInfo(nsPaletteInfo& aPaletteInfo);
-
- NS_IMETHOD PrepareDocument(PRUnichar * aTitle,
- PRUnichar* aPrintToFileName) { return NS_OK; }
- NS_IMETHOD AbortDocument(void) { return NS_OK; }
-
- #ifdef NS_PRINT_PREVIEW
- NS_IMETHOD SetAltDevice(nsIDeviceContext* aAltDC);
- NS_IMETHOD GetAltDevice(nsIDeviceContext** aAltDC) { *aAltDC = mAltDC.get(); NS_IF_ADDREF(*aAltDC); return NS_OK;}
- NS_IMETHOD SetUseAltDC(PRUint8 aValue, PRBool aOn);
- #endif
-
- private:
- /* Helper methods for |CreateRenderingContext|&co. */
- nsresult InitRenderingContext(nsIRenderingContext *aContext, nsIWidget *aWindow);
- nsresult InitRenderingContext(nsIRenderingContext *aContext, nsIDrawingSurface* aSurface);
-
- protected:
- virtual ~DeviceContextImpl();
-
- void CommonInit(void);
- nsresult CreateIconILGroupContext();
- virtual nsresult CreateFontAliasTable();
- nsresult AliasFont(const nsString& aFont,
- const nsString& aAlias, const nsString& aAltAlias,
- PRBool aForceAlias);
- void GetLocaleLangGroup(void);
-
- nsFontCache *mFontCache;
- nsCOMPtr<nsIAtom> mLocaleLangGroup; // XXX temp fix for performance bug - erik
- float mZoom;
- nsHashtable* mFontAliasTable;
- float mCPixelScale;
-
- #ifdef NS_PRINT_PREVIEW
- nsCOMPtr<nsIDeviceContext> mAltDC;
- PRUint8 mUseAltDC;
- #endif
-
- public:
- nsNativeWidget mWidget;
- #ifdef NS_DEBUG
- PRBool mInitialized;
- #endif
- };
-
- #undef IMETHOD_VISIBILITY
- #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
-
- #endif /* nsDeviceContext_h___ */
-