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Diffstat (limited to 'src/3rdparty/iaccessible2/idl/AccessibleText.idl')
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diff --git a/src/3rdparty/iaccessible2/idl/AccessibleText.idl b/src/3rdparty/iaccessible2/idl/AccessibleText.idl new file mode 100644 index 0000000000..86fd93ad90 --- /dev/null +++ b/src/3rdparty/iaccessible2/idl/AccessibleText.idl @@ -0,0 +1,674 @@ +/************************************************************************* + * + * File Name (AccessibleText.idl) + * + * IAccessible2 IDL Specification + * + * Copyright (c) 2007, 2010 Linux Foundation + * Copyright (c) 2006 IBM Corporation + * Copyright (c) 2000, 2006 Sun Microsystems, Inc. + * All rights reserved. + * + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * 3. Neither the name of the Linux Foundation nor the names of its + * contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This BSD License conforms to the Open Source Initiative "Simplified + * BSD License" as published at: + * http://www.opensource.org/licenses/bsd-license.php + * + * IAccessible2 is a trademark of the Linux Foundation. The IAccessible2 + * mark may be used in accordance with the Linux Foundation Trademark + * Policy to indicate compliance with the IAccessible2 specification. + * + ************************************************************************/ + +import "objidl.idl"; +import "oaidl.idl"; +import "oleacc.idl"; +import "IA2CommonTypes.idl"; + +/** A structure containing a substring and the start and end offsets in the enclosing string. + + IAccessibleText::newText and IAccessibleText::oldText return this struct. +*/ +typedef struct IA2TextSegment { + BSTR text; ///< A copy of a segment of text taken from an enclosing paragraph. + long start; ///< Index of the first character of the segment in the enclosing text. + long end; ///< Index of the character following the last character of the segment in the enclosing text. +} IA2TextSegment; + +/** This enum defines values which specify a text boundary type. + + IA2_TEXT_BOUNDARY_SENTENCE is optional. When a method doesn't implement this + method it must return S_FALSE. Typically this feature would not be implemented + by an application. However, if the application developer was not satisfied with + how screen readers have handled the reading of sentences this boundary type + could be implemented and screen readers could use the application's version of a + sentence rather than the screen reader's. + + The rest of the boundary types must be supported. + + This enum is used in IAccessibleText::textBeforeOffset, IAccessibleText::textAtOffset, + and IAccessibleText::textAfterOffset. +*/ + +enum IA2TextBoundaryType { + IA2_TEXT_BOUNDARY_CHAR, /**< Typically, a single character is returned. In some cases more than + one character is returned, for example, when a document contains field + data such as a field containing a date, time, or footnote reference. + In this case the caret can move over several characters in one movement + of the caret. Note that after the caret moves, the caret offset changes + by the number of characters in the field, e.g. by 8 characters in the + following date: 03/26/07. */ + IA2_TEXT_BOUNDARY_WORD, /**< The range provided matches the range observed when the application + processes the Ctrl + left arrow and Ctrl + right arrow key sequences. + Typically this is from the start of one word to the start of the next, but + various applications are inconsistent in the handling of the end of a line. */ + IA2_TEXT_BOUNDARY_SENTENCE, ///< Range is from start of one sentence to the start of another sentence. + IA2_TEXT_BOUNDARY_PARAGRAPH, ///< Range is from start of one paragraph to the start of another paragraph. + IA2_TEXT_BOUNDARY_LINE, /**< Range is from start of one line to the start of another line. This + often means that an end-of-line character will appear at the end of the + range. However in the case of some applications an end-of-line character + indicates the end of a paragraph and the lines composing the paragraph, + other than the last line, do not contain an end of line character. */ + IA2_TEXT_BOUNDARY_ALL ///< Using this value will cause all text to be returned. +}; + +/** @brief This interface gives read-only access to text. + + The %IAccessibleText interface should be implemented by all components + that present textual information on the display like buttons, + text entry fields, or text portions of the document window. The interface + provides access to the text's content, attributes, and spatial location. + However, text can not be modified with this interface. That is the task + of the IAccessibleEditableText interface. + + The text length, i.e. the number of characters in the text, is + returned by IAccessibleText::nCharacters. All methods that operate + on particular characters (e.g. IAccessibleText::textAtOffset) use character + indices from 0 to length-1. All methods that operate on character positions + (e.g. IAccessibleText::text) use indices from 0 to length. + + Please note that accessible text does not necessarily support selection. + In this case it should behave as if there where no selection. An empty + selection is used for example to express the current cursor position. + + Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + + E_FAIL is returned in the following cases + @li endOffset < startOffset + @li endoffset > length +*/ +[object, uuid(24FD2FFB-3AAD-4a08-8335-A3AD89C0FB4B)] +interface IAccessibleText : IUnknown +{ + + /** @brief Adds a text selection + @param [in] startOffset + Starting offset ( 0 based). + @param [in] endOffset + Offset of first character after new selection (0 based). + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + @note Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + */ + HRESULT addSelection + ( + [in] long startOffset, + [in] long endOffset + ); + + /** @brief Returns text attributes. + @param [in] offset + Text offset (0 based). Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @param [out] startOffset + The starting offset of the character range over which all text attributes match + those of offset. (0 based) + @param [out] endOffset + The offset of the first character past the character range over which all text + attributes match those of offset. (0 based) + @param [out] textAttributes + A string of attributes describing the text. The attributes are described in the + <a href="http://www.linuxfoundation.org/en/Accessibility/IAccessible2/TextAttributes"> + text attributes specification</a> on the %IAccessible2 web site. + @retval S_OK + @retval S_FALSE if there is nothing to return, [out] values are 0s and NULL respectively + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT attributes + ( + [in] long offset, + [out] long *startOffset, + [out] long *endOffset, + [out, retval] BSTR *textAttributes + ); + + /** @brief Returns the position of the caret. + + Returns the 0-based offset of the caret within the text. If the text is + implemented as a tree of text objects with embed characters in higher levels + representing substrings of child text objects and the caret is in one of the + child text objects, then the offset in the higher level text object would be + at the embed character representing child text object that contains the caret. + + For example, if the string "one two three" is implemented as a two text objects, + with a top level text object containing an embed character "one ? three" and a + child text object containing "two" and if the caret is in the descendant object + just before the 'o' in "two", then: + <ul> + <li>the caretOffset for the "one ? three" object would be 4, matching the embed character</li> + <li>the caretOffset for "two" would be 2, matching the "o"</li> + </ul> + The caret position/offset is that of the character logically following it, e.g. + to the right of it in a left to right language, or to the left of it in a right + to left language. + @param [out] offset + The returned offset is relative to the text represented by this object. + @retval S_OK + @retval S_FALSE if the caret is not currently active on this object, i.e. the + caret is located on some other object. The returned offset value will be -1. + @note S_FALSE (and an offset of -1) will not be returned if the caret is somewhere + in the text object or one of its descendants. + */ + [propget] HRESULT caretOffset + ( + [out, retval] long *offset + ); + + + /** @brief 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. + + Note that the index 'length' is not always valid. Whether it is or not is + implementation dependent. It typically is when text is editable or otherwise + when on the screen the caret can be placed behind the text. You can be sure + that the index is valid after you have received a ::IA2_EVENT_TEXT_CARET_MOVED + event for this index. + @param [in] offset + Index of the character for which to return its bounding box. The valid range + is 0..length. Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @param [in] coordType + Specifies if the coordinates are relative to the screen or to the parent window. + @param [out] x + X coordinate of the top left corner of the bounding box of the referenced character. + @param [out] y + Y coordinate of the top left corner of the bounding box of the referenced character. + @param [out] width + Width of the bounding box of the referenced character. + @param [out] height + Height of the bounding box of the referenced character. + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT characterExtents + ( + [in] long offset, + [in] enum IA2CoordinateType coordType, + [out] long *x, + [out] long *y, + [out] long *width, + [out, retval] long *height + ); + + + /** @brief Returns the number of active non-contiguous selections + @param [out] nSelections + @retval S_OK + */ + [propget] HRESULT nSelections + ( + [out, retval] long *nSelections + ); + + /** @brief Returns the text position for the specified screen position. + + Given a point return the zero-based index of the character under that + point. The same functionality could be achieved by using the bounding + boxes for each character as returned by IAccessibleText::characterExtents. + The method IAccessibleText::offsetAtPoint, however, can be implemented + more efficiently. + + @param [in] 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 [in] 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 [in] coordType + Screen coordinates or window coordinates. + @param [out] offset + Index of the character under the given point or -1 if the point + is invalid or there is no character under the point. + @retval S_OK + @retval S_FALSE if nothing to return, [out] value is -1 + + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT offsetAtPoint + ( + [in] long x, + [in] long y, + [in] enum IA2CoordinateType coordType, + [out, retval] long *offset + ); + + /** @brief Returns the character offsets of Nth active text selection + + Returns the 0-based starting and ending offsets of the Nth selection. If the + text is implemented as a tree of text objects with embed characters in higher + levels representing substrings of child text objects, consider the following. + If the starting selection offset is in one of the child text objects, then the + starting offset in the higher level text object would be at the embed character + representing the child text object that contains the starting selection offset. + If the ending selection offset is in one of the child text objects, then the + ending offset in the higher level text object would be just after the embed + character representing the child text object that contains the ending selection + offset. + + For example, if the string "one two three" is implemented as a two text objects, + with a top level text object containing an embed character "one ? three" and a + child text object containing "two" and if the selection is the string "two" then: + <ul> + <li>the startOffset for the "one ? three" object would be 4, matching the embed character and the endOffset would be 5.</li> + <li>the startOffset for the "two" object would be 0, and the endOffset would be 3</li> + </ul> + Selection offsets are that of the character logically following it, e.g. + to the right of it in a left to right language or to the left of it in a right to left language. + @param [in] selectionIndex + Index of selection (0 based). + @param [out] startOffset + 0 based offset of first selected character + @param [out] endOffset + 0 based offset of one past the last selected character. + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT selection + ( + [in] long selectionIndex, + [out] long *startOffset, + [out, retval] long *endOffset + ); + + /** @brief Returns the substring between the two given indices. + + The substring starts with the character at startOffset (inclusive) and up to + the character at endOffset (exclusive), if startOffset is less or equal + endOffset. If endOffset is lower than startOffset, the result is the same + as a call with the two arguments being exchanged. + + The whole text can be requested by passing the indices zero and + IAccessibleText::nCharacters. If both indices have the same value, an empty + string is returned. + @param [in] startOffset + Index of the first character to include in the returned string. The valid range + is 0..length. + @param [in] endOffset + Index of the last character to exclude in the returned string. The valid range + is 0..length. + @param [out] text + Returns the substring starting with the character at startOffset (inclusive) + and up to the character at endOffset (exclusive), if startOffset is less than + or equal to endOffset. + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + @note + @li The returned string may be longer than endOffset-startOffset bytes if text + contains multi-byte characters. + @li Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + */ + [propget] HRESULT text + ( + [in] long startOffset, + [in] long endOffset, + [out, retval] BSTR *text + ); + + /** @brief Returns a text portion before the given position. + + Returns the substring of the specified text type that is located before the + given character and does not include it. The result of this method should be + same as a result for IAccessibleText::textAtOffset with a suitably decreased + index value. + + For example, if text type is ::IA2_TEXT_BOUNDARY_WORD, then the complete + word that is closest to and located before offset is returned. + + If the index is valid, but no suitable word (or other boundary type) is found, a + NULL pointer is returned. + + @param [in] offset + Index of the character for which to return the text part before it. The index + character will not be part of the returned string. The valid range is 0..length. + Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @param [in] boundaryType + The type of the text portion to return. See ::IA2TextBoundaryType for the + complete list. + @param [out] startOffset + 0 based offset of first character. + @param [out] endOffset + 0 based offset of one past the last character. + @param [out] text + Returns the requested text portion. This portion may be empty or invalid when + no appropriate text portion is found or text type is invalid. + @retval S_OK + @retval S_FALSE if the requested boundary type is not implemented, such as + ::IA2_TEXT_BOUNDARY_SENTENCE, or if there is nothing to return; + [out] values are 0s and NULL respectively + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT textBeforeOffset + ( + [in] long offset, + [in] enum IA2TextBoundaryType boundaryType, + [out] long *startOffset, + [out] long *endOffset, + [out, retval] BSTR *text + ); + + /** @brief Returns a text portion after the given position. + + Returns the substring of the specified text type that is located after the + given character and does not include it. The result of this method should be + same as a result for IAccessibleText::textAtOffset with a suitably increased + index value. + + For example, if text type is ::IA2_TEXT_BOUNDARY_WORD, then the complete + word that is closest to and located after offset is returned. + + If the index is valid, but no suitable word (or other text type) is found, a + NULL pointer is returned. + + @param [in] offset + Index of the character for which to return the text part after it. The index + character will not be part of the returned string. The valid range is 0..length. + Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @param [in] boundaryType + The type of the text portion to return. See ::IA2TextBoundaryType for the complete + list. + @param [out] startOffset + 0 based offset of first character. + @param [out] endOffset + 0 based offset of one past the last character. + @param [out] text + Returns the requested text portion. This portion may be empty or invalid when + no appropriate text portion is found or text type is invalid. + @retval S_OK + @retval S_FALSE if the requested boundary type is not implemented, such as + ::IA2_TEXT_BOUNDARY_SENTENCE, or if there is nothing to return; + [out] values are 0s and NULL respectively + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT textAfterOffset + ( + [in] long offset, + [in] enum IA2TextBoundaryType boundaryType, + [out] long *startOffset, + [out] long *endOffset, + [out, retval] BSTR *text + ); + + /** @brief Returns a text portion that spans the given position. + + Returns the substring of the specified text type at the specified offset. + + If the index is valid, but no suitable word (or other text type) is found, a + NULL pointer is returned. + + @param [in] offset + Index of the character for which to return the text part before it. The index + character will not be part of the returned string. The valid range is 0..length. + Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @param [in] boundaryType + The type of the text portion to return. See ::IA2TextBoundaryType for the complete + list. + @param [out] startOffset + 0 based offset of first character. + @param [out] endOffset + 0 based offset of one past the last character. + @param [out] text + Returns the requested text portion. This portion may be empty or invalid when + no appropriate text portion is found or text type is invalid. + @retval S_OK + @retval S_FALSE if the requested boundary type is not implemented, such as + ::IA2_TEXT_BOUNDARY_SENTENCE, or if there is nothing to return; + [out] values are 0s and NULL respectively + @retval E_INVALIDARG if bad [in] passed + */ + [propget] HRESULT textAtOffset + ( + [in] long offset, + [in] enum IA2TextBoundaryType boundaryType, + [out] long *startOffset, + [out] long *endOffset, + [out, retval] BSTR *text + ); + + /** @brief Unselects a range of text. + @param [in] selectionIndex + Index of selection to remove (0 based). + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + */ + HRESULT removeSelection + ( + [in] long selectionIndex + ); + + /** @brief Sets the position of the caret. + + The caret position/offset is that of the character logically following it, + e.g. to the right of it in a left to right language. + + Setting the caret position may or may not alter the current selection. A + change of the selection is notified to the accessibility event listeners with + an ::IA2_EVENT_TEXT_SELECTION_CHANGED event. + + When the new caret position differs from the old one (which, of course, is the + standard case) this is notified to the accessibility event listeners with an + ::IA2_EVENT_TEXT_CARET_MOVED event. + @param [in] offset + The new index of the caret. This caret is actually placed to the left side of + the character with that index. An index of 0 places the caret so that the next + insertion goes before the first character. An index of IAccessibleText::nCharacters + leads to insertion after the last character. Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + @retval S_OK + @retval E_FAIL if the caret cannot be set + @retval E_INVALIDARG if bad [in] passed + */ + HRESULT setCaretOffset + ( + [in] long offset + ); + + /** @brief Changes the bounds of an existing selection. + @param [in] selectionIndex + Index of selection to change (0 based) + @param [in] startOffset + New starting offset (0 based) + @param [in] endOffset + New ending offset (0 based) - the offset of the character just past the last character of the selection. + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + @note Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + */ + HRESULT setSelection + ( + [in] long selectionIndex, + [in] long startOffset, + [in] long endOffset + ); + + /** @brief Returns total number of characters. + + Note that this may be different than the total number of bytes required to store the + text, if the text contains multi-byte characters. + @param [out] nCharacters + @retval S_OK + */ + [propget] HRESULT nCharacters + ( + [out, retval] long *nCharacters + ); + + /** @brief Makes a specific part of string visible on screen. + @param [in] startIndex + 0 based character offset. + @param [in] endIndex + 0 based character offset - the offset of the character just past the last character of the string. + @param [in] scrollType + Defines where the object should be placed on the screen. + @retval S_OK + @retval E_INVALIDARG if bad [in] passed + @note Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + */ + HRESULT scrollSubstringTo + ( + [in] long startIndex, + [in] long endIndex, + [in] enum IA2ScrollType scrollType + ); + + /** @brief Moves the top left of a substring to a specified location. + + @param [in] startIndex + 0 based character offset. + @param [in] endIndex + 0 based character offset - the offset of the character just past the last character of the string. + @param [in] coordinateType + Specifies whether the coordinates are relative to the screen or the parent object. + @param [in] x + Defines the x coordinate. + @param [in] y + Defines the y coordinate. + @retval S_OK + @retval S_FALSE if the object is already at the specified location. + @retval E_INVALIDARG if bad [in] passed + @note Refer to @ref _specialOffsets + "Special Offsets for use in the IAccessibleText and IAccessibleEditableText Methods" + for information about special offsets that can be used in %IAccessibleText methods. + */ + HRESULT scrollSubstringToPoint + ( + [in] long startIndex, + [in] long endIndex, + [in] enum IA2CoordinateType coordinateType, + [in] long x, + [in] long y + ); + + /** @brief Returns any inserted text. + + Provided for use by the ::IA2_EVENT_TEXT_INSERTED and ::IA2_EVENT_TEXT_UPDATED + event handlers. + + This data is only guaranteed to be valid while the thread notifying the event + continues. Once the handler has returned, the validity of the data depends on + how the server manages the life cycle of its objects. Also, note that the server + may have different life cycle management strategies for controls depending on + whether or not a control manages its children. Lists, trees, and tables can have + a large number of children and thus it's possible that the child objects for those + controls would only be created as needed. Servers should document their life cycle + strategy as this will be of interest to assistive technology or script engines + accessing data out of process or from other threads. Servers only need to save the + last inserted block of text and a scope of the entire application is adequate. + + @param [out] newText + The text that was just inserted. + @retval S_OK + @retval S_FALSE If there is nothing to return, the values of IA2TextSegment + struct are set as follows: text = NULL, start = 0, end = 0. + + */ + [propget] HRESULT newText + ( + [out, retval] IA2TextSegment *newText + ); + + /** @brief Returns any removed text. + + Provided for use by the IA2_EVENT_TEXT_REMOVED/UPDATED event handlers. + + This data is only guaranteed to be valid while the thread notifying the event + continues. Once the handler has returned, the validity of the data depends on + how the server manages the life cycle of its objects. Also, note that the server + may have different life cycle management strategies for controls depending on + whether or not a control manages its children. Lists, trees, and tables can have + a large number of children and thus it's possible that the child objects for those + controls would only be created as needed. Servers should document their life cycle + strategy as this will be of interest to assistive technology or script engines + accessing data out of process or from other threads. Servers only need to save the + last removed block of text and a scope of the entire application is adequate. + + @param [out] oldText + The text that was just removed. + @retval S_OK + @retval S_FALSE If there is nothing to return, the values of IA2TextSegment + struct are set as follows: text = NULL, start = 0, end = 0. + */ + [propget] HRESULT oldText + ( + [out, retval] IA2TextSegment *oldText + ); + +} |