home *** CD-ROM | disk | FTP | other *** search
- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla 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/MPL/
- *
- * 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 the Mozilla browser.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1999
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Paul Sandoz (paul.sandoz@sun.com)
- * Bill Haneman (bill.haneman@sun.com)
- * John Gaunt (jgaunt@netscape.com)
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of 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 MPL, 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 MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #include "nsISupports.idl"
-
- typedef long nsAccessibleTextBoundary;
- typedef long nsAccessibleCoordType;
-
- [scriptable, uuid(E44D3FA6-9CB2-432A-8BDB-69D72B6ADA00)]
- interface nsIAccessibleText : nsISupports
- {
- const nsAccessibleTextBoundary BOUNDARY_CHAR = 0;
- const nsAccessibleTextBoundary BOUNDARY_WORD_START = 1;
- const nsAccessibleTextBoundary BOUNDARY_WORD_END = 2;
- const nsAccessibleTextBoundary BOUNDARY_SENTENCE_START = 3;
- const nsAccessibleTextBoundary BOUNDARY_SENTENCE_END = 4;
- const nsAccessibleTextBoundary BOUNDARY_LINE_START = 5;
- const nsAccessibleTextBoundary BOUNDARY_LINE_END = 6;
- const nsAccessibleTextBoundary BOUNDARY_ATTRIBUTE_RANGE = 7;
-
- const nsAccessibleCoordType COORD_TYPE_SCREEN = 0;
- const nsAccessibleCoordType COORD_TYPE_WINDOW = 1;
-
- attribute long caretOffset;
-
- readonly attribute long characterCount;
- readonly attribute long selectionCount;
-
- /**
- * String methods may need to return multibyte-encoded strings,
- * since some locales can't be encoded using 16-bit chars.
- * So the methods below might return UTF-16 strings, or they could
- * return "string" values which are UTF-8.
- */
- AString getText (in long startOffset, in long endOffset);
-
- AString getTextAfterOffset (in long offset,
- in nsAccessibleTextBoundary boundaryType,
- out long startOffset,
- out long endOffset);
-
- AString getTextAtOffset (in long offset,
- in nsAccessibleTextBoundary boundaryType,
- out long startOffset,
- out long endOffset);
-
- AString getTextBeforeOffset (in long offset,
- in nsAccessibleTextBoundary boundaryType,
- out long startOffset,
- out long endOffset);
-
- /**
- * It would be better to return an unsigned long here,
- * to allow unicode chars > 16 bits
- */
- wchar getCharacterAtOffset (in long offset);
-
- nsISupports getAttributeRange (in long offset,
- out long rangeStartOffset,
- out long rangeEndOffset);
-
- void getCharacterExtents (in long offset,
- out long x,
- out long y,
- out long width,
- out long height,
- in nsAccessibleCoordType coordType);
-
- long getOffsetAtPoint (in long x, in long y,
- in nsAccessibleCoordType coordType);
-
- void getSelectionBounds (in long selectionNum,
- out long startOffset,
- out long endOffset);
-
- void setSelectionBounds (in long selectionNum,
- in long startOffset,
- in long endOffset);
-
- void addSelection (in long startOffset, in long endOffset);
-
- void removeSelection (in long selectionNum);
- };
-
- /*
- Assumptions:
-
- Using wstring (UCS2) instead of string encoded in UTF-8.
- Multibyte encodings (or at least potentially multi-byte
- encodings) would be preferred for the reasons cited above.
-
- The following methods will throw an exception on failure
- (since not every text component will allow every operation):
- setSelectionBounds, addSelection, removeSelection, setCaretOffset.
-
- getRangeAttributes defined to return an nsISupports
- interface instead of a pango specific data structure.
- It may be that some other return type is more appropriate
- for mozilla text attributes.
-
- we assume that all text components support the idea of
- a caret offset, whether visible or "virtual". If this
- isn't the case, caretOffset can be made readonly and
- a setCaretOffset method provided which throws an exception
- on failure (as with *selection methods above).
- */
-