mirror of
https://github.com/mozilla/gecko-dev.git
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07056fa136
Fix our DOM color properties to work like on other browsers. For example, when no body bgcolor is explicitely specified, we will return the default bgcolor instead of just returning null. Same thing with text color, visited link color etc. r=fabian, sr=jst
577 lines
20 KiB
C++
577 lines
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: 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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*
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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 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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#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 nsIImage;
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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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class nsILanguageAtom;
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class nsITheme;
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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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// 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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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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* 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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* 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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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(PRUint16* aModeResult) = 0;
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NS_IMETHOD SetImageAnimationMode(PRUint16 aMode) = 0;
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/**
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* Get an special load flags for images for this context
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*/
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NS_IMETHOD GetImageLoadFlags(nsLoadFlags& aLoadFlags) = 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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* Clear style data from the root frame downwards, and reflow.
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*/
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NS_IMETHOD ClearStyleDataAndReflow(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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nsIStyleContext** aResult) = 0;
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/**
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* Resolve style for a non-element content node (i.e., one that is
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* guaranteed not to match any rules). Eventually such nodes
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* shouldn't have style contexts at all, but this at least prevents
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* the rule matching.
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*
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* XXX This is temporary. It should go away when we stop creating
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* style contexts for text nodes and placeholder frames. (We also use
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* it once to create a style context for the nsFirstLetterFrame that
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* represents everything except the first letter.)
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*
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*/
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NS_IMETHOD ResolveStyleContextForNonElement(
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nsIStyleContext* aParentContext,
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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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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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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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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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NS_IMETHOD AllocateFromShell(size_t aSize, void** aResult) = 0;
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NS_IMETHOD FreeToShell(size_t aSize, void* aFreeChunk) = 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 correponding to the given ID */
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NS_IMETHOD GetDefaultFont(PRUint8 aFontID, const nsFont** aResult) = 0;
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/** Set the default font correponding to the given ID */
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NS_IMETHOD SetDefaultFont(PRUint8 aFontID, const nsFont& aFont) = 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_INVALID_ARG is returned
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and the aValue argument is undefined, 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 aPrefType, PRBool& aValue) = 0;
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/** Get a cached integer pref, by its type
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if the type is not supported, then NS_ERROR_INVALID_ARG is returned
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and the aValue argument is undefined, otherwise aValue is set
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to the value of the integer pref */
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// * - initially created for bugs 30910, 61883, 74186, 84398
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NS_IMETHOD GetCachedIntPref(PRUint32 aPrefType, PRInt32& 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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/**
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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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NS_IMETHOD LoadImage(const nsString& aURL,
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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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NS_IMETHOD StopImagesFor(nsIFrame* aTargetFrame) = 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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* Sets whether the presentation context can scroll for a paginated
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* context.
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*/
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NS_IMETHOD 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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NS_IMETHOD GetPaginatedScrolling(PRBool* aResult) = 0;
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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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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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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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//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 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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/**
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* Set and get methods for controling the background drawing
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*/
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NS_IMETHOD GetBackgroundImageDraw(PRBool &aCanDraw)=0;
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NS_IMETHOD SetBackgroundImageDraw(PRBool aCanDraw)=0;
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NS_IMETHOD GetBackgroundColorDraw(PRBool &aCanDraw)=0;
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NS_IMETHOD SetBackgroundColorDraw(PRBool aCanDraw)=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 GetBidiEnabled(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 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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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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/**
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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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|
*/
|
|
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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|
|
|
/**
|
|
* Get the document charset
|
|
*/
|
|
NS_IMETHOD GetBidiCharset(nsAString &aCharSet) = 0;
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|
|
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|
|
#endif // IBMBIDI
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|
|
|
/**
|
|
* Render only Selection
|
|
*/
|
|
NS_IMETHOD SetIsRenderingOnlySelection(PRBool aResult) = 0;
|
|
NS_IMETHOD IsRenderingOnlySelection(PRBool* aResult) = 0;
|
|
|
|
/*
|
|
* Obtain a native them for rendering our widgets (both form controls and html)
|
|
*/
|
|
NS_IMETHOD GetTheme(nsITheme** aResult) = 0;
|
|
|
|
/*
|
|
* Notify the pres context that the theme has changed. An internal switch
|
|
* means it's one of our Mozilla themes that changed (e.g., Modern to Classic).
|
|
* Otherwise, the OS is telling us that the native theme for the platform
|
|
* has changed.
|
|
*/
|
|
NS_IMETHOD ThemeChanged() = 0;
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
NS_IMETHOD CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame) = 0;
|
|
NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRendingContext, nsIFrame * aFrame, PRUint32 aColor) = 0;
|
|
#endif
|
|
};
|
|
|
|
// Bit values for StartLoadImage's aImageStatus
|
|
#define NS_LOAD_IMAGE_STATUS_ERROR 0x1
|
|
#define NS_LOAD_IMAGE_STATUS_SIZE 0x2
|
|
#define NS_LOAD_IMAGE_STATUS_BITS 0x4
|
|
|
|
// Factory method to create a "galley" presentation context (galley is
|
|
// a kind of view that has no limit to the size of a page)
|
|
extern NS_EXPORT nsresult
|
|
NS_NewGalleyContext(nsIPresContext** aInstancePtrResult);
|
|
|
|
#ifdef MOZ_REFLOW_PERF
|
|
|
|
#define DO_GLOBAL_REFLOW_COUNT(_name, _type) \
|
|
aPresContext->CountReflows((_name), (_type), (nsIFrame*)this);
|
|
#else
|
|
#define DO_GLOBAL_REFLOW_COUNT(_name, _type)
|
|
#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___ */
|