/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: NPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Netscape Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/NPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the NPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the NPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef nsIPresContext_h___ #define nsIPresContext_h___ #include "nsISupports.h" #include "nsColor.h" #include "nsCoord.h" #include "nsAString.h" #include "nsIRequest.h" #ifdef IBMBIDI class nsBidiPresUtils; #endif // IBMBIDI struct nsFont; struct nsRect; class imgIRequest; class nsIContent; class nsIDocument; class nsIDeviceContext; class nsIFontMetrics; class nsIFrame; class nsIImage; class nsILinkHandler; class nsIPresShell; class nsIPref; class nsIStyleContext; class nsIAtom; class nsString; class nsIEventStateManager; class nsIURI; class nsILookAndFeel; class nsICSSPseudoComparator; class nsILanguageAtom; class nsITheme; #ifdef MOZ_REFLOW_PERF class nsIRenderingContext; #endif #define NS_IPRESCONTEXT_IID \ { 0x0a5d12e0, 0x944e, 0x11d1, \ {0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} } enum nsCompatibility { eCompatibility_Standard = 1, eCompatibility_NavQuirks = 2 }; enum nsWidgetRendering { eWidgetRendering_Native = 1, eWidgetRendering_Gfx = 2, eWidgetRendering_PartialGfx = 3 }; enum nsWidgetType { eWidgetType_Button = 1, eWidgetType_Checkbox = 2, eWidgetType_Radio = 3, eWidgetType_Text = 4 }; enum nsLanguageSpecificTransformType { eLanguageSpecificTransformType_Unknown = -1, eLanguageSpecificTransformType_None = 0, eLanguageSpecificTransformType_Japanese, eLanguageSpecificTransformType_Korean }; // supported values for cached bool types const PRUint32 kPresContext_UseDocumentColors = 0x01; const PRUint32 kPresContext_UseDocumentFonts = 0x02; const PRUint32 kPresContext_UnderlineLinks = 0x03; // supported values for cached integer pref types const PRUint32 kPresContext_MinimumFontSize = 0x01; // IDs for the default variable and fixed fonts (not to be changed, see nsFont.h) // To be used for Get/SetDefaultFont(). The other IDs in nsFont.h are also supported. const PRUint8 kPresContext_DefaultVariableFont_ID = 0x00; // kGenericFont_moz_variable const PRUint8 kPresContext_DefaultFixedFont_ID = 0x01; // kGenericFont_moz_fixed // An interface for presentation contexts. Presentation contexts are // objects that provide an outer context for a presentation shell. class nsIPresContext : public nsISupports { public: static const nsIID& GetIID() { static nsIID iid = NS_IPRESCONTEXT_IID; return iid; } /** * Initialize the presentation context from a particular device. */ NS_IMETHOD Init(nsIDeviceContext* aDeviceContext) = 0; /** * Set the presentation shell that this context is bound to. * A presentation context may only be bound to a single shell. */ NS_IMETHOD SetShell(nsIPresShell* aShell) = 0; /** * Get the PresentationShell that this context is bound to. */ NS_IMETHOD GetShell(nsIPresShell** aResult) = 0; /** * Access compatibility mode for this context * * All users must explicitly set the compatibility mode rather than * relying on a default. */ NS_IMETHOD GetCompatibilityMode(nsCompatibility* aModeResult) = 0; NS_IMETHOD SetCompatibilityMode(nsCompatibility aMode) = 0; /** * Access the widget rendering mode for this context */ NS_IMETHOD GetWidgetRenderingMode(nsWidgetRendering* aModeResult) = 0; NS_IMETHOD SetWidgetRenderingMode(nsWidgetRendering aMode) = 0; /** * Access the image animation mode for this context */ NS_IMETHOD GetImageAnimationMode(PRUint16* aModeResult) = 0; NS_IMETHOD SetImageAnimationMode(PRUint16 aMode) = 0; /** * Get an special load flags for images for this context */ NS_IMETHOD GetImageLoadFlags(nsLoadFlags& aLoadFlags) = 0; /** * Get look and feel object */ NS_IMETHOD GetLookAndFeel(nsILookAndFeel** aLookAndFeel) = 0; /** * Get base url for presentation */ NS_IMETHOD GetBaseURL(nsIURI** aURLResult) = 0; /** * Get medium of presentation */ NS_IMETHOD GetMedium(nsIAtom** aMediumResult) = 0; /** * Clear style data from the root frame downwards, and reflow. */ NS_IMETHOD ClearStyleDataAndReflow(void) = 0; /** * Resolve style for the given piece of content that will be a child * of the aParentContext. Don't use this for pseudo frames. */ NS_IMETHOD ResolveStyleContextFor(nsIContent* aContent, nsIStyleContext* aParentContext, nsIStyleContext** aResult) = 0; /** * Resolve style for a non-element content node (i.e., one that is * guaranteed not to match any rules). Eventually such nodes * shouldn't have style contexts at all, but this at least prevents * the rule matching. * * XXX This is temporary. It should go away when we stop creating * style contexts for text nodes and placeholder frames. (We also use * it once to create a style context for the nsFirstLetterFrame that * represents everything except the first letter.) * */ NS_IMETHOD ResolveStyleContextForNonElement( nsIStyleContext* aParentContext, nsIStyleContext** aResult) = 0; /** * Resolve style for a pseudo frame within the given aParentContent & aParentContext. * The tag should be lowercase and inclue the colon. * ie: NS_NewAtom(":first-line"); */ NS_IMETHOD ResolvePseudoStyleContextFor(nsIContent* aParentContent, nsIAtom* aPseudoTag, nsIStyleContext* aParentContext, nsIStyleContext** aResult) = 0; /** * Resolve style for a pseudo frame within the given aParentContent & aParentContext. * The tag should be lowercase and inclue the colon. * ie: NS_NewAtom(":first-line"); * * Instead of matching solely on aPseudoTag, a comparator function can be * passed in to test. */ NS_IMETHOD ResolvePseudoStyleWithComparator(nsIContent* aParentContent, nsIAtom* aPseudoTag, nsIStyleContext* aParentContext, nsICSSPseudoComparator* aComparator, nsIStyleContext** aResult) = 0; /** * Probe style for a pseudo frame within the given aParentContent & aParentContext. * This will return nsnull id there are no explicit rules for the pseudo element. * The tag should be lowercase and inclue the colon. * ie: NS_NewAtom(":first-line"); */ NS_IMETHOD ProbePseudoStyleContextFor(nsIContent* aParentContent, nsIAtom* aPseudoTag, nsIStyleContext* aParentContext, nsIStyleContext** aResult) = 0; /** * For a given frame tree, get a new style context that is the equivalent * but within a new parent */ NS_IMETHOD ReParentStyleContext(nsIFrame* aFrame, nsIStyleContext* aNewParentContext) = 0; NS_IMETHOD AllocateFromShell(size_t aSize, void** aResult) = 0; NS_IMETHOD FreeToShell(size_t aSize, void* aFreeChunk) = 0; /** * Get the font metrics for a given font. */ NS_IMETHOD GetMetricsFor(const nsFont& aFont, nsIFontMetrics** aResult) = 0; /** Get the default font correponding to the given ID */ NS_IMETHOD GetDefaultFont(PRUint8 aFontID, const nsFont** aResult) = 0; /** Set the default font correponding to the given ID */ NS_IMETHOD SetDefaultFont(PRUint8 aFontID, const nsFont& aFont) = 0; /** Get a cached boolean pref, by its type if the type is not supported, then NS_ERROR_INVALID_ARG is returned and the aValue argument is undefined, otherwise aValue is set to the value of the boolean pref */ // * - initially created for bugs 31816, 20760, 22963 NS_IMETHOD GetCachedBoolPref(PRUint32 aPrefType, PRBool& aValue) = 0; /** Get a cached integer pref, by its type if the type is not supported, then NS_ERROR_INVALID_ARG is returned and the aValue argument is undefined, otherwise aValue is set to the value of the integer pref */ // * - initially created for bugs 30910, 61883, 74186, 84398 NS_IMETHOD GetCachedIntPref(PRUint32 aPrefType, PRInt32& aValue) = 0; /** * Access Nav's magic font scaler value */ NS_IMETHOD GetFontScaler(PRInt32* aResult) = 0; NS_IMETHOD SetFontScaler(PRInt32 aScaler) = 0; /** * Get the default colors */ NS_IMETHOD GetDefaultColor(nscolor* aColor) = 0; NS_IMETHOD GetDefaultBackgroundColor(nscolor* aColor) = 0; NS_IMETHOD GetDefaultBackgroundImage(nsString& aImage) = 0; NS_IMETHOD GetDefaultBackgroundImageRepeat(PRUint8* aRepeat) = 0; NS_IMETHOD GetDefaultBackgroundImageOffset(nscoord* aX, nscoord* aY) = 0; NS_IMETHOD GetDefaultBackgroundImageAttachment(PRUint8* aRepeat) = 0; NS_IMETHOD GetDefaultLinkColor(nscolor* aColor) = 0; NS_IMETHOD GetDefaultVisitedLinkColor(nscolor* aColor) = 0; NS_IMETHOD GetFocusBackgroundColor(nscolor* aColor) = 0; NS_IMETHOD GetFocusTextColor(nscolor* aColor) = 0; NS_IMETHOD GetUseFocusColors(PRBool& useFocusColors) = 0; NS_IMETHOD GetFocusRingWidth(PRUint8 *focusRingWidth) = 0; NS_IMETHOD GetFocusRingOnAnything(PRBool& focusRingOnAnything) = 0; NS_IMETHOD SetDefaultColor(nscolor aColor) = 0; NS_IMETHOD SetDefaultBackgroundColor(nscolor aColor) = 0; NS_IMETHOD SetDefaultBackgroundImage(const nsString& aImage) = 0; NS_IMETHOD SetDefaultBackgroundImageRepeat(PRUint8 aRepeat) = 0; NS_IMETHOD SetDefaultBackgroundImageOffset(nscoord aX, nscoord aY) = 0; NS_IMETHOD SetDefaultBackgroundImageAttachment(PRUint8 aRepeat) = 0; NS_IMETHOD SetDefaultLinkColor(nscolor aColor) = 0; NS_IMETHOD SetDefaultVisitedLinkColor(nscolor aColor) = 0; /** * Load an image for the target frame. This call can be made * repeated with only a single image ever being loaded. When the * image's data is ready for rendering the target frame's Paint() * method will be invoked (via the ViewManager) so that the * appropriate damage repair is done. */ NS_IMETHOD LoadImage(const nsString& aURL, nsIFrame* aTargetFrame, imgIRequest **aRequest) = 0; /** * This method is called when a frame is being destroyed to * ensure that the image load gets disassociated from the prescontext */ NS_IMETHOD StopImagesFor(nsIFrame* aTargetFrame) = 0; NS_IMETHOD SetContainer(nsISupports* aContainer) = 0; NS_IMETHOD GetContainer(nsISupports** aResult) = 0; // XXX this are going to be replaced with set/get container NS_IMETHOD SetLinkHandler(nsILinkHandler* aHandler) = 0; NS_IMETHOD GetLinkHandler(nsILinkHandler** aResult) = 0; /** * Get the visible area associated with this presentation context. * This is the size of the visiable area that is used for * presenting the document. The returned value is in the standard * nscoord units (as scaled by the device context). */ NS_IMETHOD GetVisibleArea(nsRect& aResult) = 0; /** * Set the currently visible area. The units for r are standard * nscoord units (as scaled by the device context). */ NS_IMETHOD SetVisibleArea(const nsRect& r) = 0; /** * Return true if this presentation context is a paginated * context. */ NS_IMETHOD IsPaginated(PRBool* aResult) = 0; /** * Sets whether the presentation context can scroll for a paginated * context. */ NS_IMETHOD SetPaginatedScrolling(PRBool aResult) = 0; /** * Return true if this presentation context can scroll for paginated * context. */ NS_IMETHOD GetPaginatedScrolling(PRBool* aResult) = 0; /** * Gets the rect for the page Dimimensions, * this includes X,Y Offsets which are used to determine * the inclusion of margins * Also, indicates whether the size has been overridden * * @param aActualRect returns the size of the actual device/surface * @param aRect returns the adjusted size */ NS_IMETHOD GetPageDim(nsRect* aActualRect, nsRect* aAdjRect) = 0; /** * Sets the "adjusted" rect for the page Dimimensions, * this includes X,Y Offsets which are used to determine * the inclusion of margins * * @param aRect returns the adjusted size */ NS_IMETHOD SetPageDim(nsRect* aRect) = 0; NS_IMETHOD GetPixelsToTwips(float* aResult) const = 0; NS_IMETHOD GetTwipsToPixels(float* aResult) const = 0; NS_IMETHOD GetTwipsToPixelsForFonts(float* aResult) const = 0; //XXX this is probably not an ideal name. MMP /** * Do pixels to twips conversion taking into account * differing size of a "pixel" from device to device. */ NS_IMETHOD GetScaledPixelsToTwips(float* aScale) const = 0; //be sure to Relase() after you are done with the Get() NS_IMETHOD GetDeviceContext(nsIDeviceContext** aResult) const = 0; NS_IMETHOD GetEventStateManager(nsIEventStateManager** aManager) = 0; NS_IMETHOD GetLanguage(nsILanguageAtom** aLanguage) = 0; /** * Get the language-specific transform type for the current document. * This tells us whether we need to perform special language-dependent * transformations such as Unicode U+005C (backslash) to Japanese * Yen Sign (Unicode U+00A5, JIS 0x5C). * * @param aType returns type, must be non-NULL */ NS_IMETHOD GetLanguageSpecificTransformType( nsLanguageSpecificTransformType* aType) = 0; /** * Set and get methods for controling the background drawing */ NS_IMETHOD GetBackgroundImageDraw(PRBool &aCanDraw)=0; NS_IMETHOD SetBackgroundImageDraw(PRBool aCanDraw)=0; NS_IMETHOD GetBackgroundColorDraw(PRBool &aCanDraw)=0; NS_IMETHOD SetBackgroundColorDraw(PRBool aCanDraw)=0; #ifdef IBMBIDI /** * Check if bidi enabled (set depending on the presence of RTL * characters or when default directionality is RTL). * If enabled, we should apply the Unicode Bidi Algorithm * * @lina 07/12/2000 */ NS_IMETHOD GetBidiEnabled(PRBool* aBidiEnabled) const = 0; /** * Set bidi enabled. This means we should apply the Unicode Bidi Algorithm * * @lina 07/12/2000 */ NS_IMETHOD SetBidiEnabled(PRBool aBidiEnabled) const = 0; /** * Set visual or implicit mode into the pres context. * * Visual directionality is a presentation method that displays text * as if it were a uni-directional, according to the primary display * direction only. * * Implicit directionality is a presentation method in which the * direction is determined by the Bidi algorithm according to the * category of the characters and the category of the adjacent * characters, and according to their primary direction. * * @lina 05/02/2000 */ NS_IMETHOD SetVisualMode(PRBool aIsVisual) = 0; /** * Check whether the content should be treated as visual. * * @lina 05/02/2000 */ NS_IMETHOD IsVisualMode(PRBool& aIsVisual) const = 0; //Mohamed /** * Get a Bidi presentation utilities object */ NS_IMETHOD GetBidiUtils(nsBidiPresUtils** aBidiUtils) = 0; /** * Set the Bidi options for the presentation context */ NS_IMETHOD SetBidi(PRUint32 aBidiOptions, PRBool aForceReflow = PR_FALSE) = 0; /** * Get the Bidi options for the presentation context */ NS_IMETHOD GetBidi(PRUint32* aBidiOptions) = 0; //ahmed /** * Check for Bidi text mode and direction * @return aResult == TRUE if the text mode is visual and the direction is right-to-left */ NS_IMETHOD IsVisRTL(PRBool &aResult) = 0; /** * Check for Arabic encoding * @return aResult == TRUE if the document encoding is an Arabic codepage */ NS_IMETHOD IsArabicEncoding(PRBool &aResult) = 0; /** * Set the Bidi capabilities of the system * @param aIsBidi == TRUE if the system has the capability of reordering Bidi text */ NS_IMETHOD SetIsBidiSystem(PRBool aIsBidi) = 0; /** * Get the Bidi capabilities of the system * @return aResult == TRUE if the system has the capability of reordering Bidi text */ NS_IMETHOD GetIsBidiSystem(PRBool &aResult) const = 0; /** * Get the document charset */ NS_IMETHOD GetBidiCharset(nsAString &aCharSet) = 0; #endif // IBMBIDI /** * 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___ */