зеркало из https://github.com/mozilla/gecko-dev.git
221 строка
9.1 KiB
C++
221 строка
9.1 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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* NOTE!! This is not a general class, but specific to layout and frames.
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* Consumers looking for the general selection interface should look at
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* nsIDOMSelection.
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*/
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#ifndef nsIFrameSelection_h___
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#define nsIFrameSelection_h___
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#include "nsISupports.h"
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#include "nsIFrame.h"
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#include "nsIFocusTracker.h"
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#include "nsIDOMSelection.h"
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#include "nsIPresShell.h"
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#include "nsIContent.h"
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#include "nsCOMPtr.h"
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// IID for the nsIFrameSelection interface
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#define NS_IFRAMESELECTION_IID \
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{ 0xf46e4171, 0xdeaa, 0x11d1, \
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{ 0x97, 0xfc, 0x0, 0x60, 0x97, 0x3, 0xc1, 0x4e } }
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//----------------------------------------------------------------------
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// Selection interface
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struct SelectionDetails
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{
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PRInt32 mStart;
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PRInt32 mEnd;
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SelectionType mType;
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SelectionDetails *mNext;
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};
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/*PeekOffsetStruct
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* @param mTracker is used to get the PresContext usefull for measuring text ect.
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* @param mDesiredX is the "desired" location of the new caret
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* @param mAmount eWord, eCharacter, eLine
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* @param mDirection enum defined in this file to be eForward or eBackward
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* @param mStartOffset start offset to start the peek. 0 == beginning -1 = end
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* @param mResultContent content that actually is the next/previous
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* @param mResultOffset offset for result content
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* @param mResultFrame resulting frame for peeking
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* @param mEatingWS boolean to tell us the state of our search for Next/Prev
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* @param mPreferLeft true = prev line end, false = next line begin
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*/
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struct nsPeekOffsetStruct
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{
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void SetData(nsIFocusTracker *aTracker,
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nscoord aDesiredX,
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nsSelectionAmount aAmount,
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nsDirection aDirection,
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PRInt32 aStartOffset,
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PRBool aEatingWS,
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PRBool aPreferLeft)
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{
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mTracker=aTracker;mDesiredX=aDesiredX;mAmount=aAmount;
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mDirection=aDirection;mStartOffset=aStartOffset;mEatingWS=aEatingWS;
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mPreferLeft=aPreferLeft;
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}
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nsIFocusTracker *mTracker;
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nscoord mDesiredX;
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nsSelectionAmount mAmount;
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nsDirection mDirection;
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PRInt32 mStartOffset;
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nsCOMPtr<nsIContent> mResultContent;
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PRInt32 mContentOffset;
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nsIFrame *mResultFrame;
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PRBool mEatingWS;
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PRBool mPreferLeft;
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};
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class nsIFrameSelection : public nsISupports {
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IFRAMESELECTION_IID; return iid; }
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/** Init will initialize the frame selector with the necessary focus tracker to
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* be used by most of the methods
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* @param aTracker is the parameter to be used for most of the other calls for callbacks ect
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*/
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NS_IMETHOD Init(nsIFocusTracker *aTracker) = 0;
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/** ShutDown will be called when the owner of the frame selection is shutting down
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* this should be the time to release all member variable interfaces. all methods
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* called after ShutDown should return NS_ERROR_FAILURE
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*/
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NS_IMETHOD ShutDown() = 0;
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/** HandleKeyEvent will accept an event and frame and
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* will return NS_OK if it handles the event or NS_COMFALSE if not.
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* <P>DOES NOT ADDREF<P>
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* @param aGuiEvent is the event that should be dealt with by aFocusFrame
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* @param aFrame is the frame that MAY handle the event
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*/
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NS_IMETHOD HandleTextEvent(nsGUIEvent *aGuiEvent) = 0;
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/** HandleKeyEvent will accept an event and frame and
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* will return NS_OK if it handles the event or NS_COMFALSE if not.
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* <P>DOES NOT ADDREF<P>
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* @param aGuiEvent is the event that should be dealt with by aFocusFrame
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* @param aFrame is the frame that MAY handle the event
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*/
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NS_IMETHOD HandleKeyEvent(nsGUIEvent *aGuiEvent) = 0;
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/** HandleClick will take the focus to the new frame at the new offset and
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* will either extend the selection from the old anchor, or replace the old anchor.
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* the old anchor and focus position may also be used to deselect things
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* @param aNewfocus is the content that wants the focus
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* @param aContentOffset is the content offset of the parent aNewFocus
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* @param aContentOffsetEnd is the content offset of the parent aNewFocus and is specified different
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* when you need to select to and include both start and end points
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* @param aContinueSelection is the flag that tells the selection to keep the old anchor point or not.
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* @param aMultipleSelection will tell the frame selector to replace /or not the old selection.
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* cannot coexist with aContinueSelection
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*/
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NS_IMETHOD HandleClick(nsIContent *aNewFocus, PRUint32 aContentOffset, PRUint32 aContentEndOffset ,
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PRBool aContinueSelection, PRBool aMultipleSelection) = 0;
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/** HandleDrag extends the selection to contain the frame closest to aPoint.
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* @param aPresContext is the context to use when figuring out what frame contains the point.
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* @param aFrame is the parent of all frames to use when searching for the closest frame to the point.
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* @param aPoint is relative to aFrame's parent view.
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*/
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NS_IMETHOD HandleDrag(nsIPresContext *aPresContext, nsIFrame *aFrame, nsPoint& aPoint) = 0;
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/** StartAutoScrollTimer is responsible for scrolling the view so that aPoint is always
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* visible, and for selecting any frame that contains aPoint. The timer will also reset
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* itself to fire again if the view has not scrolled to the end of the document.
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* @param aPresContext is the context to use when figuring out what frame contains the point.
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* @param aFrame is the parent of all frames to use when searching for the closest frame to the point.
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* @param aPoint is relative to aFrame's parent view.
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* @param aDelay is the timer's interval.
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*/
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NS_IMETHOD StartAutoScrollTimer(nsIPresContext *aPresContext, nsIFrame *aFrame, nsPoint& aPoint, PRUint32 aDelay) = 0;
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/** StopAutoScrollTimer stops any active auto scroll timer.
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*/
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NS_IMETHOD StopAutoScrollTimer() = 0;
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/** EnableFrameNotification
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* mutch like start batching, except all dirty calls are ignored. no notifications will go
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* out until enableNotifications with a PR_TRUE is called
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*/
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NS_IMETHOD EnableFrameNotification(PRBool aEnable) = 0;
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/** Lookup Selection
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* returns in frame coordinates the selection beginning and ending with the type of selection given
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* @param aContent is the content asking
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* @param aContentOffset is the starting content boundary
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* @param aContentLength is the length of the content piece asking
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* @param aReturnDetails linkedlist of return values for the selection.
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*/
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NS_IMETHOD LookUpSelection(nsIContent *aContent, PRInt32 aContentOffset, PRInt32 aContentLength,
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SelectionDetails **aReturnDetails) = 0;
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/** SetMouseDownState(PRBool);
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* sets the mouse state to aState for resons of drag state.
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* @param aState is the new state of mousedown
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*/
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NS_IMETHOD SetMouseDownState(PRBool aState)=0;
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/** GetMouseDownState(PRBool *);
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* gets the mouse state to aState for resons of drag state.
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* @param aState will hold the state of mousedown
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*/
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NS_IMETHOD GetMouseDownState(PRBool *aState)=0;
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/** GetSelection
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* no query interface for selection. must use this method now.
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* @param aSelectionType enum value defined in nsIDOMSelection for the domseleciton you want.
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*/
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NS_IMETHOD GetSelection(SelectionType aSelectionType, nsIDOMSelection **aDomSelection)=0;
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/**
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* ScrollSelectionIntoView scrolls a region of the selection,
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* so that it is visible in the scrolled view.
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*
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* @param aType the selection to scroll into view.
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* @param aRegion the region inside the selection to scroll into view.
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*/
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NS_IMETHOD ScrollSelectionIntoView(SelectionType aSelectionType, SelectionRegion aRegion)=0;
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/** RepaintSelection repaints the selected frames that are inside the selection
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* specified by aSelectionType.
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* @param aSelectionType enum value defined in nsIDOMSelection for the domseleciton you want.
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*/
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NS_IMETHOD RepaintSelection(SelectionType aSelectionType)=0;
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/** GetFrameForNodeOffset given a node and its child offset, return the nsIFrame and
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* the offset into that frame.
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* @param aNode input parameter for the node to look at
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* @param aOffset offset into above node.
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* @param aResultFrame will contain the return frame. MUST NOT BE NULL or will return error
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*/
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NS_IMETHOD GetFrameForNodeOffset(nsIContent *aNode, PRInt32 aOffset, nsIFrame **aReturnFrame)=0;
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};
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#endif /* nsIFrameSelection_h___ */
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