зеркало из https://github.com/mozilla/pjs.git
237 строки
9.9 KiB
Plaintext
237 строки
9.9 KiB
Plaintext
/* -*- 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;
|
|
|
|
interface nsIAccessible;
|
|
|
|
[scriptable, uuid(caa4f543-070e-4705-8428-2e53575c41bb)]
|
|
interface nsIAccessibleText : nsISupports
|
|
{
|
|
// In parameters for character offsets:
|
|
// -1 will be treated as the equal to the end of the text
|
|
// -2 will be treated as the caret position
|
|
const PRInt32 TEXT_OFFSET_END_OF_TEXT = -1;
|
|
const PRInt32 TEXT_OFFSET_CARET = -2;
|
|
|
|
const nsAccessibleTextBoundary BOUNDARY_CHAR = 0;
|
|
const nsAccessibleTextBoundary BOUNDARY_WORD_START = 1;
|
|
const nsAccessibleTextBoundary BOUNDARY_WORD_END = 2;
|
|
const nsAccessibleTextBoundary BOUNDARY_SENTENCE_START = 3; // don't use, deprecated
|
|
const nsAccessibleTextBoundary BOUNDARY_SENTENCE_END = 4; // don't use, deprecated
|
|
const nsAccessibleTextBoundary BOUNDARY_LINE_START = 5;
|
|
const nsAccessibleTextBoundary BOUNDARY_LINE_END = 6;
|
|
const nsAccessibleTextBoundary BOUNDARY_ATTRIBUTE_RANGE = 7;
|
|
|
|
/**
|
|
* The current current caret offset.
|
|
* If set < 0 then caret will be placed at the end of the text
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* Get the accessible and start/end offsets around the given offset.
|
|
* This accessible get return the DOM node and layout frame
|
|
* with the uniform attributes for this range of text
|
|
*/
|
|
nsIAccessible getAttributeRange (in long offset,
|
|
out long rangeStartOffset,
|
|
out long rangeEndOffset);
|
|
|
|
/**
|
|
* Returns the bounding box of the specified position.
|
|
*
|
|
* The virtual character after the last character of the represented text,
|
|
* i.e. the one at position length is a special case. It represents the
|
|
* current input position and will therefore typically be queried by AT more
|
|
* often than other positions. Because it does not represent an existing
|
|
* character its bounding box is defined in relation to preceding characters.
|
|
* It should be roughly equivalent to the bounding box of some character when
|
|
* inserted at the end of the text. Its height typically being the maximal
|
|
* height of all the characters in the text or the height of the preceding
|
|
* character, its width being at least one pixel so that the bounding box is
|
|
* not degenerate.
|
|
*
|
|
* @param offset - Index of the character for which to return its bounding
|
|
* box. The valid range is 0..length.
|
|
* @param x - X coordinate of the bounding box of the referenced character.
|
|
* @param y - Y coordinate of the bounding box of the referenced character.
|
|
* @param width - Width of the bounding box of the referenced character.
|
|
* @param height - Height of the bounding box of the referenced character.
|
|
* @param coordType - Specifies if the coordinates are relative to the screen
|
|
* or to the parent window (see constants declared in
|
|
* nsIAccessibleCoordinateType).
|
|
*/
|
|
void getCharacterExtents (in long offset,
|
|
out long x,
|
|
out long y,
|
|
out long width,
|
|
out long height,
|
|
in unsigned long coordType);
|
|
|
|
void getRangeExtents (in long startOffset,
|
|
in long endOffset,
|
|
out long x,
|
|
out long y,
|
|
out long width,
|
|
out long height,
|
|
in unsigned long coordType);
|
|
|
|
/**
|
|
* Get the text offset at the given point, or return -1
|
|
* if no character exists at that point
|
|
*
|
|
* @param x - The position's x value for which to look up the index of the
|
|
* character that is rendered on to the display at that point.
|
|
* @param y - The position's y value for which to look up the index of the
|
|
* character that is rendered on to the display at that point.
|
|
* @param coordType - Screen coordinates or window coordinates (see constants
|
|
* declared in nsIAccessibleCoordinateType).
|
|
* @return offset - Index of the character under the given point or -1 if
|
|
* the point is invalid or there is no character under
|
|
* the point.
|
|
*/
|
|
long getOffsetAtPoint (in long x, in long y,
|
|
in unsigned long coordType);
|
|
|
|
void getSelectionBounds (in long selectionNum,
|
|
out long startOffset,
|
|
out long endOffset);
|
|
|
|
/**
|
|
* Set the bounds for the given selection range
|
|
*/
|
|
void setSelectionBounds (in long selectionNum,
|
|
in long startOffset,
|
|
in long endOffset);
|
|
|
|
void addSelection (in long startOffset, in long endOffset);
|
|
|
|
void removeSelection (in long selectionNum);
|
|
|
|
|
|
/**
|
|
* Makes a specific part of string visible on screen.
|
|
*
|
|
* @param startIndex 0-based character offset
|
|
* @param endIndex 0-based character offset - the offset of the
|
|
* character just past the last character of the
|
|
* string
|
|
* @param scrollType defines how to scroll (see nsIAccessibleScrollType for
|
|
* available constants)
|
|
*/
|
|
void scrollSubstringTo(in long startIndex, in long endIndex,
|
|
in unsigned long scrollType);
|
|
|
|
/**
|
|
* Moves the top left of a substring to a specified location.
|
|
*
|
|
* @param startIndex 0-based character offset
|
|
* @param endIndex 0-based character offset - the offset of the
|
|
* character just past the last character of
|
|
* the string
|
|
* @param coordinateType specifies the coordinates origin (for available
|
|
* constants refer to nsIAccessibleCoordinateType)
|
|
* @param x defines the x coordinate
|
|
* @param y defines the y coordinate
|
|
*/
|
|
void scrollSubstringToPoint(in long startIndex, in long endIndex,
|
|
in unsigned long coordinateType,
|
|
in long x, in long y);
|
|
};
|
|
|
|
/*
|
|
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).
|
|
*/
|