зеркало из https://github.com/mozilla/pjs.git
623 строки
20 KiB
C++
623 строки
20 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: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsIPresContext_h___
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#define nsIPresContext_h___
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#include "nsISupports.h"
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#include "nsColor.h"
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#include "nsCoord.h"
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#include "nsAString.h"
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#include "nsIRequest.h"
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#include "nsCompatibility.h"
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#include "nsCOMPtr.h"
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#include "nsIPresShell.h"
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#include "nsRect.h"
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#include "nsIDeviceContext.h"
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#ifdef IBMBIDI
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class nsBidiPresUtils;
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#endif // IBMBIDI
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struct nsFont;
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struct nsRect;
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class imgIRequest;
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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 nsFrameManager;
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class nsIImage;
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class nsILinkHandler;
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class nsStyleContext;
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class nsIAtom;
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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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class nsILanguageAtom;
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class nsITheme;
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struct nsStyleStruct;
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struct nsStyleBackground;
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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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{ 0xfaf7c34a, 0x347c, 0x48f6, \
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{0x81, 0x76, 0xc0, 0xf6, 0xd4, 0xe5, 0x74, 0x2e} }
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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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// supported values for cached integer pref types
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const PRUint32 kPresContext_MinimumFontSize = 0x01;
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// IDs for the default variable and fixed fonts (not to be changed, see nsFont.h)
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// To be used for Get/SetDefaultFont(). The other IDs in nsFont.h are also supported.
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const PRUint8 kPresContext_DefaultVariableFont_ID = 0x00; // kGenericFont_moz_variable
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const PRUint8 kPresContext_DefaultFixedFont_ID = 0x01; // kGenericFont_moz_fixed
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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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NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPRESCONTEXT_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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* 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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nsIPresShell* PresShell() const
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{
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NS_ASSERTION(mShell, "Null pres shell");
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return mShell;
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}
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nsIPresShell* GetPresShell() const { return mShell; }
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nsIDocument* GetDocument() { return GetPresShell()->GetDocument(); }
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nsIViewManager* GetViewManager() { return GetPresShell()->GetViewManager(); }
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#ifdef _IMPL_NS_LAYOUT
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nsStyleSet* StyleSet() { return GetPresShell()->StyleSet(); }
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nsFrameManager* FrameManager()
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{ return GetPresShell()->FrameManager(); }
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#endif
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/**
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* Access compatibility mode for this context
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*
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* All users must explicitly set the compatibility mode rather than
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* relying on a default.
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*/
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nsCompatibility CompatibilityMode() const { return mCompatibilityMode; }
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virtual void SetCompatibilityMode(nsCompatibility 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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PRUint16 ImageAnimationMode() const { return mImageAnimationMode; }
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virtual void SetImageAnimationMode(PRUint16 aMode) = 0;
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/**
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* Get cached look and feel service. This is faster than obtaining it
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* through the service manager.
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*/
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nsILookAndFeel* LookAndFeel() { return mLookAndFeel; }
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/**
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* Get medium of presentation
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*/
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nsIAtom* Medium() { return mMedium; }
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/**
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* Clear style data from the root frame downwards, and reflow.
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*/
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virtual void ClearStyleDataAndReflow() = 0;
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/**
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* Resolve a new style context for a content node and return the URL
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* for its XBL binding, or null if it has no binding specified in CSS.
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*/
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virtual nsresult GetXBLBindingURL(nsIContent* aContent,
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nsIURI** aResult) = 0;
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void* AllocateFromShell(size_t aSize)
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{
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if (mShell)
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return mShell->AllocateFrame(aSize);
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return nsnull;
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}
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void FreeToShell(size_t aSize, void* aFreeChunk)
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{
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if (mShell)
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mShell->FreeFrame(aSize, aFreeChunk);
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}
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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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/**
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* Get the default font correponding to the given ID. This object is
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* read-only, you must copy the font to modify it.
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*/
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virtual const nsFont* GetDefaultFont(PRUint8 aFontID) const = 0;
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/** Get a cached boolean pref, by its type */
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// * - initially created for bugs 31816, 20760, 22963
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PRBool GetCachedBoolPref(PRUint32 aPrefType) const
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{
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// If called with a constant parameter, the compiler should optimize
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// this switch statement away.
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switch (aPrefType) {
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case kPresContext_UseDocumentFonts:
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return mUseDocumentFonts;
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case kPresContext_UseDocumentColors:
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return mUseDocumentColors;
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case kPresContext_UnderlineLinks:
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return mUnderlineLinks;
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default:
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NS_ERROR("Invalid arg passed to GetCachedBoolPref");
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}
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return PR_FALSE;
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}
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/** Get a cached integer pref, by its type */
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// * - initially created for bugs 30910, 61883, 74186, 84398
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PRInt32 GetCachedIntPref(PRUint32 aPrefType) const
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{
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// If called with a constant parameter, the compiler should optimize
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// this switch statement away.
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switch (aPrefType) {
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case kPresContext_MinimumFontSize:
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return mMinimumFontSize;
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default:
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NS_ERROR("invalid arg passed to GetCachedIntPref");
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}
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return PR_FALSE;
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}
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/**
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* Access Nav's magic font scaler value
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*/
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PRInt32 FontScaler() const { return mFontScaler; }
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/**
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* Get the default colors
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*/
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const nscolor DefaultColor() const { return mDefaultColor; }
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const nscolor DefaultBackgroundColor() const { return mBackgroundColor; }
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const nscolor DefaultLinkColor() const { return mLinkColor; }
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const nscolor DefaultActiveLinkColor() const { return mActiveLinkColor; }
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const nscolor DefaultVisitedLinkColor() const { return mVisitedLinkColor; }
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const nscolor FocusBackgroundColor() const { return mFocusBackgroundColor; }
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const nscolor FocusTextColor() const { return mFocusTextColor; }
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PRBool GetUseFocusColors() const { return mUseFocusColors; }
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PRUint8 FocusRingWidth() const { return mFocusRingWidth; }
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PRBool GetFocusRingOnAnything() const { return mFocusRingOnAnything; }
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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. 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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virtual nsresult LoadImage(imgIRequest* aImage,
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nsIFrame* aTargetFrame,
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imgIRequest **aRequest) = 0;
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/**
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* This method is called when a frame is being destroyed to
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* ensure that the image load gets disassociated from the prescontext
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*/
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virtual void StopImagesFor(nsIFrame* aTargetFrame) = 0;
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virtual void SetContainer(nsISupports* aContainer) = 0;
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virtual already_AddRefed<nsISupports> GetContainer() = 0;
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// XXX this are going to be replaced with set/get container
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void SetLinkHandler(nsILinkHandler* aHandler) { mLinkHandler = aHandler; }
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nsILinkHandler* GetLinkHandler() { return mLinkHandler; }
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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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nsRect GetVisibleArea() { return mVisibleArea; }
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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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void SetVisibleArea(const nsRect& r) { mVisibleArea = r; }
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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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PRBool IsPaginated() const { return mPaginated; }
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/**
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* Sets whether the presentation context can scroll for a paginated
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* context.
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*/
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virtual void SetPaginatedScrolling(PRBool aResult) = 0;
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/**
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* Return true if this presentation context can scroll for paginated
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* context.
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*/
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PRBool HasPaginatedScrolling() const { return mCanPaginatedScroll; }
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/**
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* Gets the rect for the page dimensions,
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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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virtual void 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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virtual void SetPageDim(nsRect* aRect) = 0;
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float PixelsToTwips() const { return mDeviceContext->DevUnitsToAppUnits(); }
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float TwipsToPixels() const { return mDeviceContext->AppUnitsToDevUnits(); }
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NS_IMETHOD GetTwipsToPixelsForFonts(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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nsIDeviceContext* DeviceContext() { return mDeviceContext; }
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nsIEventStateManager* EventStateManager() { return mEventManager; }
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nsILanguageAtom* GetLanguage() { return mLanguage; }
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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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nsLanguageSpecificTransformType LanguageSpecificTransformType() const
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{
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return mLanguageSpecificTransformType;
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}
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void SetViewportOverflowOverride(PRUint8 aStyle)
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{
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mViewportStyleOverflow = aStyle;
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}
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PRUint8 GetViewportOverflowOverride() { return mViewportStyleOverflow; }
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/**
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* Set and get methods for controling the background drawing
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*/
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PRBool GetBackgroundImageDraw() const { return mDrawImageBackground; }
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void SetBackgroundImageDraw(PRBool aCanDraw)
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{
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NS_ASSERTION(!(aCanDraw & ~1), "Value must be true or false");
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mDrawImageBackground = aCanDraw;
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}
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PRBool GetBackgroundColorDraw() const { return mDrawColorBackground; }
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void SetBackgroundColorDraw(PRBool aCanDraw)
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{
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NS_ASSERTION(!(aCanDraw & ~1), "Value must be true or false");
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mDrawColorBackground = aCanDraw;
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}
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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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virtual PRBool BidiEnabled() 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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virtual void SetBidiEnabled(PRBool aBidiEnabled) 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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void SetVisualMode(PRBool aIsVisual)
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{
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NS_ASSERTION(!(aIsVisual & ~1), "Value must be true or false");
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mIsVisual = aIsVisual;
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}
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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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PRBool IsVisualMode() const { return mIsVisual; }
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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) const = 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) const = 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) const = 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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void SetIsBidiSystem(PRBool aIsBidi)
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{
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NS_ASSERTION(!(aIsBidi & ~1), "Value must be true or false");
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mIsBidiSystem = aIsBidi;
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}
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/**
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* Get the Bidi capabilities of the system
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* @return TRUE if the system has the capability of reordering Bidi text
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*/
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PRBool IsBidiSystem() const { return mIsBidiSystem; }
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/**
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* Get the document charset
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*/
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NS_IMETHOD GetBidiCharset(nsACString &aCharSet) const = 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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void SetIsRenderingOnlySelection(PRBool aResult)
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{
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NS_ASSERTION(!(aResult & ~1), "Value must be true or false");
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mIsRenderingOnlySelection = aResult;
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}
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PRBool IsRenderingOnlySelection() const { return mIsRenderingOnlySelection; }
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/*
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* Obtain a native them for rendering our widgets (both form controls and html)
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*/
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NS_IMETHOD GetTheme(nsITheme** aResult) = 0;
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/*
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* Notify the pres context that the theme has changed. An internal switch
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* means it's one of our Mozilla themes that changed (e.g., Modern to Classic).
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* Otherwise, the OS is telling us that the native theme for the platform
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* has changed.
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*/
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NS_IMETHOD ThemeChanged() = 0;
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/*
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* Notify the pres context that a system color has changed
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*/
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NS_IMETHOD SysColorChanged() = 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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protected:
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// IMPORTANT: The ownership implicit in the following member variables
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// has been explicitly checked. If you add any members to this class,
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// please make the ownership explicit (pinkerton, scc).
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nsIPresShell* mShell; // [WEAK]
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nsIDeviceContext* mDeviceContext; // [STRONG] could be weak, but
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// better safe than sorry.
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// Cannot reintroduce cycles
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// since there is no dependency
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// from gfx back to layout.
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nsIEventStateManager* mEventManager; // [STRONG]
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nsILookAndFeel* mLookAndFeel; // [STRONG]
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nsIAtom* mMedium; // initialized by subclass ctors;
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// weak pointer to static atom
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nsILinkHandler* mLinkHandler; // [WEAK]
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nsILanguageAtom* mLanguage; // [STRONG]
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nsLanguageSpecificTransformType mLanguageSpecificTransformType;
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PRInt32 mFontScaler;
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nscoord mMinimumFontSize;
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nsRect mVisibleArea;
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nscolor mDefaultColor;
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nscolor mBackgroundColor;
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nscolor mLinkColor;
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nscolor mActiveLinkColor;
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nscolor mVisitedLinkColor;
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|
|
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nscolor mFocusBackgroundColor;
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nscolor mFocusTextColor;
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|
|
|
PRUint8 mFocusRingWidth;
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|
PRUint8 mViewportStyleOverflow;
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|
|
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nsCompatibility mCompatibilityMode;
|
|
PRUint16 mImageAnimationMode;
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|
|
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unsigned mUseDocumentFonts : 1;
|
|
unsigned mUseDocumentColors : 1;
|
|
unsigned mUnderlineLinks : 1;
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|
unsigned mUseFocusColors : 1;
|
|
unsigned mFocusRingOnAnything : 1;
|
|
unsigned mDrawImageBackground : 1;
|
|
unsigned mDrawColorBackground : 1;
|
|
unsigned mNeverAnimate : 1;
|
|
unsigned mIsRenderingOnlySelection : 1;
|
|
unsigned mNoTheme : 1;
|
|
unsigned mPaginated : 1;
|
|
unsigned mCanPaginatedScroll : 1;
|
|
#ifdef IBMBIDI
|
|
unsigned mIsVisual : 1;
|
|
unsigned mIsBidiSystem : 1;
|
|
#endif
|
|
};
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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
|
|
// a kind of view that has no limit to the size of a page)
|
|
nsresult
|
|
NS_NewGalleyContext(nsIPresContext** aInstancePtrResult);
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
|
|
#define DO_GLOBAL_REFLOW_COUNT(_name, _type) \
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|
aPresContext->CountReflows((_name), (_type), (nsIFrame*)this);
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|
#else
|
|
#define DO_GLOBAL_REFLOW_COUNT(_name, _type)
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#endif // MOZ_REFLOW_PERF
|
|
|
|
#if defined(MOZ_REFLOW_PERF_DSP) && defined(MOZ_REFLOW_PERF)
|
|
#define DO_GLOBAL_REFLOW_COUNT_DSP(_name, _rend) \
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) { \
|
|
aPresContext->PaintCount((_name), (_rend), (nsIFrame*)this, 0); \
|
|
}
|
|
#define DO_GLOBAL_REFLOW_COUNT_DSP_J(_name, _rend, _just) \
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) { \
|
|
aPresContext->PaintCount((_name), (_rend), (nsIFrame*)this, (_just)); \
|
|
}
|
|
#else
|
|
#define DO_GLOBAL_REFLOW_COUNT_DSP(_name, _rend)
|
|
#define DO_GLOBAL_REFLOW_COUNT_DSP_J(_name, _rend, _just)
|
|
#endif // MOZ_REFLOW_PERF_DSP
|
|
|
|
#endif /* nsIPresContext_h___ */
|