зеркало из https://github.com/mozilla/pjs.git
187 строки
6.9 KiB
C++
187 строки
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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 the Mozilla browser.
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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) 1999
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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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/* service providing platform-specific native rendering for widgets */
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#ifndef nsITheme_h_
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#define nsITheme_h_
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#include "nsISupports.h"
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#include "nsCOMPtr.h"
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#include "nsColor.h"
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struct nsRect;
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struct nsIntSize;
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struct nsFont;
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struct nsIntMargin;
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class nsPresContext;
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class nsIRenderingContext;
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class nsIDeviceContext;
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class nsIFrame;
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class nsIContent;
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class nsIAtom;
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// IID for the nsITheme interface
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// {887e8902-db6b-41b4-8481-a80f49c5a93a}
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#define NS_ITHEME_IID \
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{ 0x23db7c13, 0x873d, 0x4fb5, { 0xaf, 0x29, 0xc1, 0xe9, 0xed, 0x91, 0x23, 0xf9 } }
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// {D930E29B-6909-44e5-AB4B-AF10D6923705}
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#define NS_THEMERENDERER_CID \
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{ 0xd930e29b, 0x6909, 0x44e5, { 0xab, 0x4b, 0xaf, 0x10, 0xd6, 0x92, 0x37, 0x5 } }
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enum nsTransparencyMode {
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eTransparencyOpaque = 0, // Fully opaque
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eTransparencyTransparent, // Parts of the window may be transparent
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eTransparencyGlass // Transparent parts of the window have Vista AeroGlass effect applied
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};
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/**
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* nsITheme is a service that provides platform-specific native
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* rendering for widgets. In other words, it provides the necessary
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* operations to draw a rendering object (an nsIFrame) as a native
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* widget.
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*
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* All the methods on nsITheme take a rendering context or device
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* context, a frame (the rendering object), and a widget type (one of
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* the constants in nsThemeConstants.h).
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*/
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class nsITheme: public nsISupports {
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ITHEME_IID)
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NS_IMETHOD DrawWidgetBackground(nsIRenderingContext* aContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType,
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const nsRect& aRect,
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const nsRect& aDirtyRect)=0;
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/**
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* Get the computed CSS border for the widget, in pixels.
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*/
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NS_IMETHOD GetWidgetBorder(nsIDeviceContext* aContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType,
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nsIntMargin* aResult)=0;
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/**
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* This method can return PR_FALSE to indicate that the CSS padding
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* value should be used. Otherwise, it will fill in aResult with the
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* computed padding, in pixels, and return PR_TRUE.
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*
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* XXXldb This ought to be required to return true for non-containers
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* so that we don't let specified padding that has no effect change
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* the computed padding and potentially the size.
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*/
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virtual PRBool GetWidgetPadding(nsIDeviceContext* aContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType,
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nsIntMargin* aResult) = 0;
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/**
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* On entry, *aResult is positioned at 0,0 and sized to the new size
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* of aFrame (aFrame->GetSize() may be stale and should not be used).
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* This method can return PR_FALSE to indicate that no special
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* overflow area is required by the native widget. Otherwise it will
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* fill in aResult with the desired overflow area, in appunits, relative
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* to the frame origin, and return PR_TRUE.
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*/
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virtual PRBool GetWidgetOverflow(nsIDeviceContext* aContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType,
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/*INOUT*/ nsRect* aOverflowRect)
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{ return PR_FALSE; }
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/**
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* Get the minimum border-box size of a widget, in *pixels* (in
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* |aResult|). If |aIsOverridable| is set to true, this size is a
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* minimum size; if false, this size is the only valid size for the
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* widget.
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*/
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NS_IMETHOD GetMinimumWidgetSize(nsIRenderingContext* aContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType,
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nsIntSize* aResult,
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PRBool* aIsOverridable)=0;
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enum Transparency {
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eOpaque = 0,
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eTransparent,
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eUnknownTransparency
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};
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/**
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* Returns what we know about the transparency of the widget.
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*/
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virtual Transparency GetWidgetTransparency(nsIFrame* aFrame, PRUint8 aWidgetType)
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{ return eUnknownTransparency; }
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NS_IMETHOD WidgetStateChanged(nsIFrame* aFrame, PRUint8 aWidgetType,
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nsIAtom* aAttribute, PRBool* aShouldRepaint)=0;
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NS_IMETHOD ThemeChanged()=0;
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/**
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* Can the nsITheme implementation handle this widget?
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*/
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virtual PRBool ThemeSupportsWidget(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType)=0;
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virtual PRBool WidgetIsContainer(PRUint8 aWidgetType)=0;
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/**
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* Does the nsITheme implementation draw its own focus ring for this widget?
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*/
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virtual PRBool ThemeDrawsFocusForWidget(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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PRUint8 aWidgetType)=0;
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/**
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* Should we insert a dropmarker inside of combobox button?
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*/
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virtual PRBool ThemeNeedsComboboxDropmarker()=0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsITheme, NS_ITHEME_IID)
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// Creator function
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extern NS_METHOD NS_NewNativeTheme(nsISupports *aOuter, REFNSIID aIID, void **aResult);
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#endif
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