mirror of
https://github.com/mozilla/gecko-dev.git
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541 lines
18 KiB
C++
541 lines
18 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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* IBM Corporation
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*
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* This Original Code has been modified by IBM Corporation.
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* Modifications made by IBM described herein are
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* Copyright (c) International Business Machines
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* Corporation, 2000
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*
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* Modifications to Mozilla code or documentation
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* identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 03/20/2000 IBM Corp. BiDi - ability to change the default direction of the browser
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*
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*/
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#ifndef nsIPresContext_h___
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#define nsIPresContext_h___
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#include "nslayout.h"
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#include "nsISupports.h"
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#include "nsRect.h"
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#include "nsColor.h"
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#include "nsIFrameImageLoader.h"
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#include "nsILanguageAtom.h"
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#ifdef IBMBIDI
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#include "nsIUBidiUtils.h"
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class nsAutoString;
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class nsBidiPresUtils;
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#endif // IBMBIDI
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struct nsFont;
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class nsIContent;
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class nsIDocument;
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class nsIDeviceContext;
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class nsIFontMetrics;
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class nsIFrame;
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class nsIImage;
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class nsIImageGroup;
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class nsILinkHandler;
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class nsIPresShell;
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class nsIPref;
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class nsIStyleContext;
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class nsIAtom;
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class nsString;
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class nsIEventStateManager;
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class nsIURI;
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class nsILookAndFeel;
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class nsICSSPseudoComparator;
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#ifdef MOZ_REFLOW_PERF
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class nsIRenderingContext;
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#endif
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#define NS_IPRESCONTEXT_IID \
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{ 0x0a5d12e0, 0x944e, 0x11d1, \
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{0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
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enum nsCompatibility {
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eCompatibility_Standard = 1,
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eCompatibility_NavQuirks = 2
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};
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enum nsWidgetRendering {
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eWidgetRendering_Native = 1,
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eWidgetRendering_Gfx = 2,
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eWidgetRendering_PartialGfx = 3
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};
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enum nsWidgetType {
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eWidgetType_Button = 1,
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eWidgetType_Checkbox = 2,
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eWidgetType_Radio = 3,
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eWidgetType_Text = 4
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};
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enum nsLanguageSpecificTransformType {
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eLanguageSpecificTransformType_Unknown = -1,
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eLanguageSpecificTransformType_None = 0,
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eLanguageSpecificTransformType_Japanese,
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eLanguageSpecificTransformType_Korean
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};
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// supported values for cached bool types
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const PRUint32 kPresContext_UseDocumentColors = 0x01;
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const PRUint32 kPresContext_UseDocumentFonts = 0x02;
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const PRUint32 kPresContext_UnderlineLinks = 0x03;
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// An interface for presentation contexts. Presentation contexts are
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// objects that provide an outer context for a presentation shell.
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class nsIPresContext : public nsISupports {
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IPRESCONTEXT_IID; return iid; }
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/**
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* Initialize the presentation context from a particular device.
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*/
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NS_IMETHOD Init(nsIDeviceContext* aDeviceContext) = 0;
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/**
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* Stop the presentation in preperation for destruction.
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* @param aStopChrome PR_TRUE to stop chrome as well.
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*/
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NS_IMETHOD Stop(PRBool aStopChrome = PR_TRUE) = 0;
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/**
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* Set the presentation shell that this context is bound to.
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* A presentation context may only be bound to a single shell.
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*/
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NS_IMETHOD SetShell(nsIPresShell* aShell) = 0;
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/**
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* Get the PresentationShell that this context is bound to.
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*/
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NS_IMETHOD GetShell(nsIPresShell** aResult) = 0;
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/**
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* Access compatibility mode for this context
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*/
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NS_IMETHOD GetCompatibilityMode(nsCompatibility* aModeResult) = 0;
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NS_IMETHOD SetCompatibilityMode(nsCompatibility aMode) = 0;
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/**
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* Access the widget rendering mode for this context
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*/
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NS_IMETHOD GetWidgetRenderingMode(nsWidgetRendering* aModeResult) = 0;
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NS_IMETHOD SetWidgetRenderingMode(nsWidgetRendering aMode) = 0;
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/**
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* Access the image animation mode for this context
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*/
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NS_IMETHOD GetImageAnimationMode(nsImageAnimation* aModeResult) = 0;
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NS_IMETHOD SetImageAnimationMode(nsImageAnimation aMode) = 0;
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/**
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* Get look and feel object
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*/
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NS_IMETHOD GetLookAndFeel(nsILookAndFeel** aLookAndFeel) = 0;
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/**
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* Get base url for presentation
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*/
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NS_IMETHOD GetBaseURL(nsIURI** aURLResult) = 0;
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/**
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* Get medium of presentation
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*/
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NS_IMETHOD GetMedium(nsIAtom** aMediumResult) = 0;
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/**
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* Remap style from the root frame downwards, and reflow.
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*/
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NS_IMETHOD RemapStyleAndReflow(void) = 0;
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/**
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* Resolve style for the given piece of content that will be a child
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* of the aParentContext. Don't use this for pseudo frames.
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*/
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NS_IMETHOD ResolveStyleContextFor(nsIContent* aContent,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique,
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nsIStyleContext** aResult) = 0;
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/**
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* Resolve style for a pseudo frame within the given aParentContent & aParentContext.
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* The tag should be lowercase and inclue the colon.
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* ie: NS_NewAtom(":first-line");
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*/
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NS_IMETHOD ResolvePseudoStyleContextFor(nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique,
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nsIStyleContext** aResult) = 0;
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/**
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* Resolve style for a pseudo frame within the given aParentContent & aParentContext.
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* The tag should be lowercase and inclue the colon.
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* ie: NS_NewAtom(":first-line");
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*
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* Instead of matching solely on aPseudoTag, a comparator function can be
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* passed in to test.
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*/
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NS_IMETHOD ResolvePseudoStyleWithComparator(nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique,
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nsICSSPseudoComparator* aComparator,
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nsIStyleContext** aResult) = 0;
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/**
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* Probe style for a pseudo frame within the given aParentContent & aParentContext.
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* This will return nsnull id there are no explicit rules for the pseudo element.
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* The tag should be lowercase and inclue the colon.
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* ie: NS_NewAtom(":first-line");
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*/
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NS_IMETHOD ProbePseudoStyleContextFor(nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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PRBool aForceUnique,
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nsIStyleContext** aResult) = 0;
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/**
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* For a given frame tree, get a new style context that is the equivalent
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* but within a new parent
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*/
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NS_IMETHOD ReParentStyleContext(nsIFrame* aFrame,
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nsIStyleContext* aNewParentContext) = 0;
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/**
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* Get the font metrics for a given font.
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*/
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NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIFontMetrics** aResult) = 0;
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/** Get the default font */
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NS_IMETHOD GetDefaultFont(nsFont& aResult) = 0;
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/** Set the default font */
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NS_IMETHOD SetDefaultFont(const nsFont& aFont) = 0;
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virtual const nsFont& GetDefaultFontDeprecated() = 0;
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/** Get the default fixed pitch font */
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NS_IMETHOD GetDefaultFixedFont(nsFont& aResult) = 0;
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/** Set the default fixed pitch font */
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NS_IMETHOD SetDefaultFixedFont(const nsFont& aFont) = 0;
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virtual const nsFont& GetDefaultFixedFontDeprecated() = 0;
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/** Get a cached boolean pref, by its type
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if the type is not supported, then NS_ERROR_FAILURE is returned
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and the aValue argument is undfined, otherwise aValue is set
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to the value of the boolean pref */
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// * - initially created for bugs 31816, 20760, 22963
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NS_IMETHOD GetCachedBoolPref(PRUint32 prefType, PRBool &aValue) = 0;
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/**
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* Access Nav's magic font scaler value
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*/
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NS_IMETHOD GetFontScaler(PRInt32* aResult) = 0;
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NS_IMETHOD SetFontScaler(PRInt32 aScaler) = 0;
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/**
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* Get the default colors
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*/
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NS_IMETHOD GetDefaultColor(nscolor* aColor) = 0;
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NS_IMETHOD GetDefaultBackgroundColor(nscolor* aColor) = 0;
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NS_IMETHOD GetDefaultBackgroundImage(nsString& aImage) = 0;
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NS_IMETHOD GetDefaultBackgroundImageRepeat(PRUint8* aRepeat) = 0;
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NS_IMETHOD GetDefaultBackgroundImageOffset(nscoord* aX, nscoord* aY) = 0;
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NS_IMETHOD GetDefaultBackgroundImageAttachment(PRUint8* aRepeat) = 0;
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NS_IMETHOD GetDefaultLinkColor(nscolor* aColor) = 0;
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NS_IMETHOD GetDefaultVisitedLinkColor(nscolor* aColor) = 0;
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NS_IMETHOD GetFocusBackgroundColor(nscolor* aColor) = 0;
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NS_IMETHOD GetFocusTextColor(nscolor* aColor) = 0;
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NS_IMETHOD GetUseFocusColors(PRBool& useFocusColors) = 0;
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NS_IMETHOD GetFocusRingWidth(PRUint8 *focusRingWidth) = 0;
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NS_IMETHOD GetFocusRingOnAnything(PRBool& focusRingOnAnything) = 0;
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NS_IMETHOD SetDefaultColor(nscolor aColor) = 0;
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NS_IMETHOD SetDefaultBackgroundColor(nscolor aColor) = 0;
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NS_IMETHOD SetDefaultBackgroundImage(const nsString& aImage) = 0;
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NS_IMETHOD SetDefaultBackgroundImageRepeat(PRUint8 aRepeat) = 0;
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NS_IMETHOD SetDefaultBackgroundImageOffset(nscoord aX, nscoord aY) = 0;
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NS_IMETHOD SetDefaultBackgroundImageAttachment(PRUint8 aRepeat) = 0;
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NS_IMETHOD SetDefaultLinkColor(nscolor aColor) = 0;
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NS_IMETHOD SetDefaultVisitedLinkColor(nscolor aColor) = 0;
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NS_IMETHOD GetImageGroup(nsIImageGroup** aGroupResult) = 0;
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/**
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* Load an image for the target frame. This call can be made
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* repeated with only a single image ever being loaded. If
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* aNeedSizeUpdate is PR_TRUE, then when the image's size is
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* determined the target frame will be reflowed (via a
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* ContentChanged notification on the presentation shell). When the
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* image's data is ready for rendering the target frame's Paint()
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* method will be invoked (via the ViewManager) so that the
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* appropriate damage repair is done.
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*
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* @param aBackgroundColor - If the background color is NULL, a mask
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* will be generated for transparent images. If the background
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* color is non-NULL, it indicates the RGB value to be folded
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* into the transparent areas of the image and no mask is created.
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*/
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NS_IMETHOD StartLoadImage(const nsString& aURL,
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const nscolor* aBackgroundColor,
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const nsSize* aDesiredSize,
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nsIFrame* aTargetFrame,
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nsIFrameImageLoaderCB aCallBack,
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void* aClosure,
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void* aKey,
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nsIFrameImageLoader** aResult) = 0;
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/**
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* Stop a specific image load being done on behalf of the argument frame.
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*/
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NS_IMETHOD StopLoadImage(void* aKey,
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nsIFrameImageLoader* aLoader) = 0;
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/**
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* Stop any image loading being done on behalf of the argument frame.
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*/
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NS_IMETHOD StopAllLoadImagesFor(nsIFrame* aTargetFrame, void* aKey) = 0;
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NS_IMETHOD SetContainer(nsISupports* aContainer) = 0;
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NS_IMETHOD GetContainer(nsISupports** aResult) = 0;
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// XXX this are going to be replaced with set/get container
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NS_IMETHOD SetLinkHandler(nsILinkHandler* aHandler) = 0;
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NS_IMETHOD GetLinkHandler(nsILinkHandler** aResult) = 0;
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/**
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* Get the visible area associated with this presentation context.
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* This is the size of the visiable area that is used for
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* presenting the document. The returned value is in the standard
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* nscoord units (as scaled by the device context).
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*/
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NS_IMETHOD GetVisibleArea(nsRect& aResult) = 0;
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/**
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* Set the currently visible area. The units for r are standard
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* nscoord units (as scaled by the device context).
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*/
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NS_IMETHOD SetVisibleArea(const nsRect& r) = 0;
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/**
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* Return true if this presentation context is a paginated
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* context.
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*/
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NS_IMETHOD IsPaginated(PRBool* aResult) = 0;
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/**
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* Gets the rect for the page Dimimensions,
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* this includes X,Y Offsets which are used to determine
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* the inclusion of margins
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* Also, indicates whether the size has been overridden
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*
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* @param aActualRect returns the size of the actual device/surface
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* @param aRect returns the adjusted size
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*/
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NS_IMETHOD GetPageDim(nsRect* aActualRect, nsRect* aAdjRect) = 0;
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/**
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* Sets the "adjusted" rect for the page Dimimensions,
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* this includes X,Y Offsets which are used to determine
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* the inclusion of margins
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*
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* @param aRect returns the adjusted size
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*/
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NS_IMETHOD SetPageDim(nsRect* aRect) = 0;
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NS_IMETHOD GetPixelsToTwips(float* aResult) const = 0;
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NS_IMETHOD GetTwipsToPixels(float* aResult) const = 0;
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//XXX this is probably not an ideal name. MMP
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/**
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* Do pixels to twips conversion taking into account
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* differing size of a "pixel" from device to device.
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*/
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NS_IMETHOD GetScaledPixelsToTwips(float* aScale) const = 0;
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//be sure to Relase() after you are done with the Get()
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NS_IMETHOD GetDeviceContext(nsIDeviceContext** aResult) const = 0;
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NS_IMETHOD GetEventStateManager(nsIEventStateManager** aManager) = 0;
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NS_IMETHOD GetDefaultDirection(PRUint8* aDirection) = 0;
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NS_IMETHOD SetDefaultDirection(PRUint8 aDirection) = 0;
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NS_IMETHOD GetLanguage(nsILanguageAtom** aLanguage) = 0;
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/**
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* Get the language-specific transform type for the current document.
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* This tells us whether we need to perform special language-dependent
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* transformations such as Unicode U+005C (backslash) to Japanese
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* Yen Sign (Unicode U+00A5, JIS 0x5C).
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*
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* @param aType returns type, must be non-NULL
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*/
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NS_IMETHOD GetLanguageSpecificTransformType(
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nsLanguageSpecificTransformType* aType) = 0;
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#ifdef IBMBIDI
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/**
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* Check if bidi enabled (set depending on the presence of RTL
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* characters or when default directionality is RTL).
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* If enabled, we should apply the Unicode Bidi Algorithm
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*
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* @lina 07/12/2000
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*/
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NS_IMETHOD BidiEnabled(PRBool& aBidiEnabled) const = 0;
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/**
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* Set bidi enabled. This means we should apply the Unicode Bidi Algorithm
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*
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* @lina 07/12/2000
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*/
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NS_IMETHOD EnableBidi(void) const = 0;
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/**
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* Set visual or implicit mode into the pres context.
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*
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* Visual directionality is a presentation method that displays text
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* as if it were a uni-directional, according to the primary display
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* direction only.
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*
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* Implicit directionality is a presentation method in which the
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* direction is determined by the Bidi algorithm according to the
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* category of the characters and the category of the adjacent
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* characters, and according to their primary direction.
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*
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* @lina 05/02/2000
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*/
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NS_IMETHOD SetVisualMode(PRBool aIsVisual) = 0;
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/**
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* Check whether the content should be treated as visual.
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*
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* @lina 05/02/2000
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*/
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NS_IMETHOD IsVisualMode(PRBool& aIsVisual) const = 0;
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//Mohamed
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/**
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* Get a Bidi presentation utilities object
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*/
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NS_IMETHOD GetBidiUtils(nsBidiPresUtils** aBidiUtils) = 0;
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/**
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* Set the Bidi options for the presentation context
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*/
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NS_IMETHOD SetBidi(PRUint32 aBidiOptions, PRBool aForceReflow = PR_FALSE) = 0;
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/**
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* Get the Bidi options for the presentation context
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*/
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NS_IMETHOD GetBidi(PRUint32* aBidiOptions) = 0;
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//ahmed
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/**
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* Check for Bidi text mode and direction
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* @return aResult == TRUE if the text mode is visual and the direction is right-to-left
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*/
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NS_IMETHOD IsVisRTL(PRBool &aResult) = 0;
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/**
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* Check for Arabic encoding
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* @return aResult == TRUE if the document encoding is an Arabic codepage
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*/
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NS_IMETHOD IsArabicEncoding(PRBool &aResult) = 0;
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/**
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* Set the Bidi capabilities of the system
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* @param aIsBidi == TRUE if the system has the capability of reordering Bidi text
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*/
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NS_IMETHOD SetIsBidiSystem(PRBool aIsBidi) = 0;
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/**
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* Get the Bidi capabilities of the system
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* @return aResult == TRUE if the system has the capability of reordering Bidi text
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*/
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NS_IMETHOD GetIsBidiSystem(PRBool &aResult) const = 0;
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/**
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* Get the document charset
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*/
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NS_IMETHOD GetBidiCharset(nsAutoString &aCharSet) = 0;
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#endif // IBMBIDI
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/**
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* Render only Selection
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*/
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NS_IMETHOD SetIsRenderingOnlySelection(PRBool aResult) = 0;
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NS_IMETHOD IsRenderingOnlySelection(PRBool* aResult) = 0;
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#ifdef MOZ_REFLOW_PERF
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NS_IMETHOD CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame) = 0;
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NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRendingContext, nsIFrame * aFrame, PRUint32 aColor) = 0;
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#endif
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};
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// Bit values for StartLoadImage's aImageStatus
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#define NS_LOAD_IMAGE_STATUS_ERROR 0x1
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#define NS_LOAD_IMAGE_STATUS_SIZE 0x2
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#define NS_LOAD_IMAGE_STATUS_BITS 0x4
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// Factory method to create a "galley" presentation context (galley is
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// a kind of view that has no limit to the size of a page)
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extern NS_LAYOUT nsresult
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NS_NewGalleyContext(nsIPresContext** aInstancePtrResult);
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// Factory method to create a "paginated" presentation context for
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// the screen.
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extern NS_LAYOUT nsresult
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NS_NewPrintPreviewContext(nsIPresContext** aInstancePtrResult);
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#ifdef MOZ_REFLOW_PERF
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#define DO_GLOBAL_REFLOW_COUNT(_name, _type) \
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aPresContext->CountReflows((_name), (_type), (nsIFrame*)this);
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#else
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#define DO_GLOBAL_REFLOW_COUNT(_name, _type)
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#endif // MOZ_REFLOW_PERF
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#if defined(MOZ_REFLOW_PERF_DSP) && defined(MOZ_REFLOW_PERF)
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#define DO_GLOBAL_REFLOW_COUNT_DSP(_name, _rend) \
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if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) { \
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aPresContext->PaintCount((_name), (_rend), (nsIFrame*)this, 0); \
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}
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#define DO_GLOBAL_REFLOW_COUNT_DSP_J(_name, _rend, _just) \
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if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) { \
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aPresContext->PaintCount((_name), (_rend), (nsIFrame*)this, (_just)); \
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}
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#else
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#define DO_GLOBAL_REFLOW_COUNT_DSP(_name, _rend)
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#define DO_GLOBAL_REFLOW_COUNT_DSP_J(_name, _rend, _just)
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#endif // MOZ_REFLOW_PERF_DSP
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#endif /* nsIPresContext_h___ */
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