зеркало из https://github.com/mozilla/gecko-dev.git
214 строки
6.9 KiB
C++
214 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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* 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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*/
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#ifndef nsITextServicesDocument_h__
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#define nsITextServicesDocument_h__
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#include "nsISupports.h"
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class nsIDOMDocument;
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class nsIPresShell;
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class nsIEditor;
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class nsString;
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/*
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TextServicesDocument interface to outside world
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*/
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#define NS_ITEXTSERVICESDOCUMENT_IID \
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{ /* 019718E1-CDB5-11d2-8D3C-000000000000 */ \
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0x019718e1, 0xcdb5, 0x11d2, \
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{ 0x8d, 0x3c, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } }
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/**
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* The nsITextServicesDocument presents the document in as a
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* bunch of flattened text blocks. Each text block can be retrieved
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* as an nsString (array of characters).
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*/
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class nsITextServicesDocument : public nsISupports{
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_ITEXTSERVICESDOCUMENT_IID; return iid; }
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typedef enum { eDSNormal=0, eDSUndlerline } TSDDisplayStyle;
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typedef enum { eBlockNotFound=0, // There is no text block (TB) in or before the selection (S).
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eBlockOutside, // No TB in S, but found one before/after S.
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eBlockInside, // S extends beyond the start and end of TB.
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eBlockContains, // TB contains entire S.
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eBlockPartial // S begins or ends in TB but extends outside of TB.
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} TSDBlockSelectionStatus;
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/**
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* Initailizes the text services document to use a particular
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* DOM document.
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* @param aDOMDocument is the document to use. It is AddRef'd
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* by this method.
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* @param aPresShell is the presentation shell to use when
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* setting the selection. It is AddRef'd by this method.
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*/
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NS_IMETHOD InitWithDocument(nsIDOMDocument *aDOMDocument, nsIPresShell *aPresShell) = 0;
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/**
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* Initializes the text services document to use a particular
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* editor. The text services document will use the DOM document
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* and presentation shell used by the editor.
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* @param aEditor is the editor to use. The editor is AddRef'd
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* by this method.
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*/
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NS_IMETHOD InitWithEditor(nsIEditor *aEditor) = 0;
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/**
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* Returns true if the document can be modified with calls
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* to DeleteSelection() and InsertText().
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* @param aCanEdit is true if the document can be modified,
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* false if it can't.
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*/
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NS_IMETHOD CanEdit(PRBool *aCanEdit) = 0;
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/**
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* Returns the text in the current text block.
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* @param aStr will contain the text.
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*/
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NS_IMETHOD GetCurrentTextBlock(nsString *aStr) = 0;
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/**
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* Tells the document to point to the first text block
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* in the document. This method does not adjust the current
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* cursor position or selection.
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*/
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NS_IMETHOD FirstBlock() = 0;
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/**
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* Tells the document to point to the last text block in the
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* document. This method does not adjust the current cursor
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* position or selection.
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*/
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NS_IMETHOD LastBlock() = 0;
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/**
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* Tells the document to point to the first text block that
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* contains the current selection or caret.
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* @param aSelectionStatus will contain the text block selection status
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* @param aSelectionOffset will contain the offset into the
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* string returned by GetCurrentTextBlock() where the selection
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* begins.
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* @param aLength will contain the number of characters that are
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* selected in the string.
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*/
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NS_IMETHOD FirstSelectedBlock(TSDBlockSelectionStatus *aSelectionStatus, PRInt32 *aSelectionOffset, PRInt32 *aSelectionLength) = 0;
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/**
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* Tells the document to point to the last text block that
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* contains the current selection or caret.
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* @param aSelectionStatus will contain the text block selection status
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* @param aSelectionOffset will contain the offset into the
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* string returned by GetCurrentTextBlock() where the selection
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* begins.
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* @param aLength will contain the number of characters that are
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* selected in the string.
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*/
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NS_IMETHOD LastSelectedBlock(TSDBlockSelectionStatus *aSelectionStatus, PRInt32 *aSelectionOffset, PRInt32 *aSelectionLength) = 0;
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/**
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* Tells the document to point to the text block before
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* the current one. This method will return NS_OK, even
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* if there is no previous block. Callers should call IsDone()
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* to check if we have gone beyond the first text block in
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* the document.
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*/
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NS_IMETHOD PrevBlock() = 0;
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/**
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* Tells the document to point to the text block after
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* the current one. This method will return NS_OK, even
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* if there is no next block. Callers should call IsDone()
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* to check if we have gone beyond the last text block
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* in the document.
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*/
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NS_IMETHOD NextBlock() = 0;
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/**
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* IsDone() will always set aIsDone == PR_FALSE unless
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* the document contains no text, PrevBlock() was called
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* while the document was already pointing to the first
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* text block in the document, or NextBlock() was called
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* while the document was already pointing to the last
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* text block in the document.
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* @param aIsDone will contain the result.
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*/
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NS_IMETHOD IsDone(PRBool *aIsDone) = 0;
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/**
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* SetSelection() allows the caller to set the selection
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* based on an offset into the string returned by
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* GetCurrentTextBlock(). A length of zero places the cursor
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* at that offset. A positive non-zero length "n" selects
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* n characters in the string.
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* @param aOffset offset into string returned by GetCurrentTextBlock().
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* @param aLength number characters selected.
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*/
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NS_IMETHOD SetSelection(PRInt32 aOffset, PRInt32 aLength) = 0;
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/**
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* Scrolls the document so that the current selection is visible.
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*/
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NS_IMETHOD ScrollSelectionIntoView() = 0;
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/**
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* Deletes the text selected by SetSelection(). Calling
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* DeleteSelection with nothing selected, or with a collapsed
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* selection (cursor) does nothing and returns NS_OK.
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*/
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NS_IMETHOD DeleteSelection() = 0;
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/**
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* Inserts the given text at the current cursor position.
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* If there is a selection, it will be deleted before the
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* text is inserted.
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*/
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NS_IMETHOD InsertText(const nsString *aText) = 0;
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/**
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* Sets the display style for the text selected by SetSelection().
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* @param aStyle is the style to apply to the selected text.
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*/
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NS_IMETHOD SetDisplayStyle(TSDDisplayStyle aStyle) = 0;
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};
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#endif // nsITextServicesDocument_h__
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