зеркало из https://github.com/mozilla/pjs.git
429 строки
16 KiB
C++
429 строки
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Steve Clark (buster@netscape.com)
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*
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* IBM Corporation
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*
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* This Original Code has been modified by IBM Corporation.
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* Modifications made by IBM described herein are
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* Copyright (c) International Business Machines
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* Corporation, 2000
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*
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* Modifications to Mozilla code or documentation
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* identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 05/03/2000 IBM Corp. Observer related defines for reflow
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*/
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#ifndef nsIPresShell_h___
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#define nsIPresShell_h___
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#include "nslayout.h"
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#include "nsISupports.h"
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#include "nsCoord.h"
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#include "nsIDOMSelection.h"
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#include "nsIReflowCommand.h"
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#include "nsGUIEvent.h"
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#include "nsISelectionController.h" //for the selection enums.
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class nsIContent;
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class nsIContentIterator;
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class nsIDocument;
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class nsIDocumentObserver;
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class nsIFrame;
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class nsIPresContext;
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class nsIStyleSet;
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class nsIViewManager;
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class nsIDeviceContext;
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class nsIRenderingContext;
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class nsIPageSequenceFrame;
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class nsString;
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class nsStringArray;
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class nsICaret;
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class nsIStyleContext;
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class nsIFrameSelection;
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class nsIFrameManager;
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class nsILayoutHistoryState;
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class nsIArena;
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#define NS_IPRESSHELL_IID \
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{ 0x76e79c60, 0x944e, 0x11d1, \
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{0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
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// Constants uses for ScrollFrameIntoView() function
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#define NS_PRESSHELL_SCROLL_TOP 0
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#define NS_PRESSHELL_SCROLL_BOTTOM 100
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#define NS_PRESSHELL_SCROLL_LEFT 0
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#define NS_PRESSHELL_SCROLL_RIGHT 100
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#define NS_PRESSHELL_SCROLL_CENTER 50
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#define NS_PRESSHELL_SCROLL_ANYWHERE -1
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#define NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE -2
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// Observer related defines
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#define NS_PRESSHELL_REFLOW_TOPIC "REFLOW" // Observer Topic
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#define NS_PRESSHELL_INITIAL_REFLOW "INITIAL REFLOW" // Observer Data
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#define NS_PRESSHELL_RESIZE_REFLOW "RESIZE REFLOW" // Observer Data
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#define NS_PRESSHELL_STYLE_CHANGE_REFLOW "STYLE CHANGE REFLOW" // Observer Data
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// debug VerifyReflow flags
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#define VERIFY_REFLOW_ON 0x01
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#define VERIFY_REFLOW_NOISY 0x02
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#define VERIFY_REFLOW_ALL 0x04
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#define VERIFY_REFLOW_DUMP_COMMANDS 0x08
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#define VERIFY_REFLOW_NOISY_RC 0x10
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#define VERIFY_REFLOW_REALLY_NOISY_RC 0x20
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#define VERIFY_REFLOW_INCLUDE_SPACE_MANAGER 0x40
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#define VERIFY_REFLOW_DURING_RESIZE_REFLOW 0x80
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/**
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* Presentation shell interface. Presentation shells are the
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* controlling point for managing the presentation of a document. The
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* presentation shell holds a live reference to the document, the
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* presentation context, the style manager, the style set and the root
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* frame. <p>
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*
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* When this object is Release'd, it will release the document, the
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* presentation context, the style manager, the style set and the root
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* frame.
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*/
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class nsIPresShell : public nsISupports {
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IPRESSHELL_IID; return iid; }
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NS_IMETHOD Init(nsIDocument* aDocument,
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nsIPresContext* aPresContext,
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nsIViewManager* aViewManager,
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nsIStyleSet* aStyleSet) = 0;
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// All frames owned by the shell are allocated from an arena. They are also recycled
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// using free lists (separate free lists being maintained for each size_t).
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// Methods for recycling frames.
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NS_IMETHOD AllocateFrame(size_t aSize, void** aResult) = 0;
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NS_IMETHOD FreeFrame(size_t aSize, void* aFreeChunk) = 0;
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// Dynamic stack memory allocation
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NS_IMETHOD PushStackMemory() = 0;
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NS_IMETHOD PopStackMemory() = 0;
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NS_IMETHOD AllocateStackMemory(size_t aSize, void** aResult) = 0;
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NS_IMETHOD GetDocument(nsIDocument** aResult) = 0;
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NS_IMETHOD GetPresContext(nsIPresContext** aResult) = 0;
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NS_IMETHOD GetViewManager(nsIViewManager** aResult) = 0;
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NS_IMETHOD GetStyleSet(nsIStyleSet** aResult) = 0;
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NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle) = 0;
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NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle) = 0;
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/**
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* Gather titles of all selectable (alternate and preferred) style sheets
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* fills void array with nsString* caller must free strings
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*/
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NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList) = 0;
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/**
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* GetFrameSelection will return the Frame based selection API you
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* cannot go back and forth anymore with QI with nsIDOM sel and nsIFrame sel.
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*/
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NS_IMETHOD GetFrameSelection(nsIFrameSelection** aSelection) = 0;
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// Make shell be a document observer
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NS_IMETHOD BeginObservingDocument() = 0;
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// Make shell stop being a document observer
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NS_IMETHOD EndObservingDocument() = 0;
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/**
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* Perform the initial reflow. Constructs the frame for the root content
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* object and then reflows the frame model into the specified width and
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* height.
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*
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* The coordinates for aWidth and aHeight must be in standard nscoord's.
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*/
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NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Reflow the frame model into a new width and height. The
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* coordinates for aWidth and aHeight must be in standard nscoord's.
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*/
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NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Reflow the frame model with a reflow reason of eReflowReason_StyleChange
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*/
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NS_IMETHOD StyleChangeReflow() = 0;
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NS_IMETHOD GetRootFrame(nsIFrame** aFrame) const = 0;
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/**
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* Returns the page sequence frame associated with the frame hierarchy.
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* Returns NULL if not a paginated view.
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*/
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NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const = 0;
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/**
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* Gets the primary frame associated with the content object. This is a
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* helper function that just forwards the request to the frame manager.
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*
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* The primary frame is the frame that is most closely associated with the
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* content. A frame is more closely associated with the content that another
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* frame if the one frame contains directly or indirectly the other frame (e.g.,
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* when a frame is scrolled there is a scroll frame that contains the frame
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* being scrolled). The primary frame is always the first-in-flow.
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*
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* In the case of absolutely positioned elements and floated elements,
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* the primary frame is the frame that is out of the flow and not the
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* placeholder frame.
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*/
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NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent,
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nsIFrame** aPrimaryFrame) const = 0;
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/** Returns the style context associated with the frame.
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* Used by code outside of layout that can't use nsIFrame methods to get
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* the style context directly.
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*/
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NS_IMETHOD GetStyleContextFor(nsIFrame* aFrame,
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nsIStyleContext** aStyleContext) const = 0;
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/**
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* Returns a layout object associated with the primary frame for the content object.
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*
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* @param aContent the content object for which we seek a layout object
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* @param aResult the resulting layout object as an nsISupports, if found. Refcounted.
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*/
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NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent,
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nsISupports** aResult) const = 0;
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/**
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* Returns the object that acts as a subshell for aContent.
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* For example, for an html frame aResult will be an nsIDocShell.
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*/
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NS_IMETHOD GetSubShellFor(nsIContent* aContent,
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nsISupports** aResult) const = 0;
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/**
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* Establish a relationship between aContent and aSubShell.
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* aSubShell will be returned from GetSubShellFor(aContent, ...);
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*/
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NS_IMETHOD SetSubShellFor(nsIContent* aContent,
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nsISupports* aSubShell) = 0;
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/**
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* Gets the placeholder frame associated with the specified frame. This is
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* a helper frame that forwards the request to the frame manager.
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*/
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NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
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nsIFrame** aPlaceholderFrame) const = 0;
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/**
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* Reflow commands
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*/
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NS_IMETHOD AppendReflowCommand(nsIReflowCommand* aReflowCommand) = 0;
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NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame, nsIReflowCommand::ReflowType* aCmdType) = 0;
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/**
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* Flush all pending notifications such that the presentation is
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* in sync with the content.
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*/
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NS_IMETHOD FlushPendingNotifications() = 0;
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/**
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* Reflow batching
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*/
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NS_IMETHOD BeginReflowBatching() = 0;
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NS_IMETHOD EndReflowBatching(PRBool aFlushPendingReflows) = 0;
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NS_IMETHOD GetReflowBatchingStatus(PRBool* aIsBatching) = 0;
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NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame) = 0;
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/**
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* Given a frame, create a rendering context suitable for use with
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* the frame.
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*/
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NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame,
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nsIRenderingContext** aContext) = 0;
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/**
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* Notification that we were unable to render a replaced element.
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* Called when the replaced element can not be rendered, and we should
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* instead render the element's contents.
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* The content object associated with aFrame should either be a IMG
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* element, an OBJECT element, or an APPLET element
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*/
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NS_IMETHOD CantRenderReplacedElement(nsIPresContext* aPresContext,
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nsIFrame* aFrame) = 0;
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/**
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* Scrolls the view of the document so that the anchor with the specified
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* name is displayed at the top of the window
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*/
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NS_IMETHOD GoToAnchor(const nsString& aAnchorName) const = 0;
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/**
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* Scrolls the view of the document so that the frame is displayed at the
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* top of the window.
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*
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* @param aFrame The frame to scroll into view
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* @param aVPercent How to align the frame vertically. A value of 0
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* (NS_PRESSHELL_SCROLL_TOP) means the frame's upper edge is
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* aligned with the top edge of the visible area. A value of
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* 100 (NS_PRESSHELL_SCROLL_BOTTOM) means the frame's bottom
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* edge is aligned with the bottom edge of the visible area.
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* For values in between, the point "aVPercent" down the frame
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* is placed at the point "aVPercent" down the visible area. A
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* value of 50 (NS_PRESSHELL_SCROLL_CENTER) centers the frame
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* vertically. A value of NS_PRESSHELL_SCROLL_ANYWHERE means move
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* the frame the minimum amount necessary in order for the entire
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* frame to be visible vertically (if possible)
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* @param aHPercent How to align the frame horizontally. A value of 0
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* (NS_PRESSHELL_SCROLL_LEFT) means the frame's left edge is
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* aligned with the left edge of the visible area. A value of
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* 100 (NS_PRESSHELL_SCROLL_RIGHT) means the frame's right
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* edge is aligned with the right edge of the visible area.
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* For values in between, the point "aVPercent" across the frame
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* is placed at the point "aVPercent" across the visible area.
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* A value of 50 (NS_PRESSHELL_SCROLL_CENTER) centers the frame
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* horizontally . A value of NS_PRESSHELL_SCROLL_ANYWHERE means move
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* the frame the minimum amount necessary in order for the entire
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* frame to be visible horizontally (if possible)
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*/
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NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame,
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PRIntn aVPercent,
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PRIntn aHPercent) const = 0;
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/**
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* Notification sent by a frame informing the pres shell that it is about to
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* be destroyed.
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* This allows any outstanding references to the frame to be cleaned up
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*/
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NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame) = 0;
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/**
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* Returns the frame manager object
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*/
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NS_IMETHOD GetFrameManager(nsIFrameManager** aFrameManager) const = 0;
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/**
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* Notify the Clipboard that we have something to copy.
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*/
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NS_IMETHOD DoCopy() = 0;
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/**
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* Get the caret, if it exists. AddRefs it.
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*/
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NS_IMETHOD GetCaret(nsICaret **aOutCaret) = 0;
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/**
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* Should the images have borders etc. Actual visual effects are determined
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* by the frames. Visual effects may not effect layout, only display.
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* Takes effect on next repaint, does not force a repaint itself.
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*
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* @param aEnabled if PR_TRUE, visual selection effects are enabled
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* if PR_FALSE visual selection effects are disabled
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* @return always NS_OK
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*/
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NS_IMETHOD SetDisplayNonTextSelection(PRBool aInEnable) = 0;
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/**
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* Gets the current state of non text selection effects
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* @param aEnabled [OUT] set to the current state of non text selection,
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* as set by SetDisplayNonTextSelection
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* @return if aOutEnabled==null, returns NS_ERROR_INVALID_ARG
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* else NS_OK
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*/
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NS_IMETHOD GetDisplayNonTextSelection(PRBool *aOutEnabled) = 0;
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/**
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* Interface to dispatch events via the presshell
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*/
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NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent,
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nsIFrame* aFrame,
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nsIContent* aContent,
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nsEventStatus* aStatus) = 0;
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/**
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* Get and set the history state for the current document
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*/
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NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState) = 0;
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NS_IMETHOD GetHistoryState(nsILayoutHistoryState** aLayoutHistoryState) = 0;
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NS_IMETHOD SetHistoryState(nsILayoutHistoryState* aLayoutHistoryState) = 0;
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/**
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* Determine if reflow is currently locked
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* @param aIsReflowLocked returns PR_TRUE if reflow is locked, PR_FALSE otherwise
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*/
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NS_IMETHOD IsReflowLocked(PRBool* aIsLocked) = 0;
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/**
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* Returns a content iterator to iterate the generated content nodes.
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* You must specify whether you want to iterate the "before" generated
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* content or the "after" generated content. If there is no generated
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* content of the specified type for the promary frame associated with
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* with the content object then NULL is returned
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*/
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enum GeneratedContentType {Before, After};
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NS_IMETHOD GetGeneratedContentIterator(nsIContent* aContent,
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GeneratedContentType aType,
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nsIContentIterator** aIterator) const = 0;
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/**
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* See if reflow verification is enabled. To enable reflow verification add
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* "verifyreflow:1" to your NSPR_LOG_MODULES environment variable
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* (any non-zero debug level will work). Or, call SetVerifyReflowEnable
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* with PR_TRUE.
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*/
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static NS_LAYOUT PRBool GetVerifyReflowEnable();
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/**
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* Set the verify-reflow enable flag.
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*/
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static NS_LAYOUT void SetVerifyReflowEnable(PRBool aEnabled);
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/**
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* Get the flags associated with the VerifyReflow debug tool
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*/
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static NS_LAYOUT PRInt32 GetVerifyReflowFlags();
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#ifdef MOZ_REFLOW_PERF
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NS_IMETHOD ClearTotals() = 0;
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NS_IMETHOD DumpReflows() = 0;
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NS_IMETHOD CountReflows(const char * aName, PRUint32 aType) = 0;
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#endif
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};
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/**
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* Create a new empty presentation shell. Upon success, call Init
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* before attempting to use the shell.
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*/
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extern NS_LAYOUT nsresult
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NS_NewPresShell(nsIPresShell** aInstancePtrResult);
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#endif /* nsIPresShell_h___ */
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