diff options
| author | Colomban Wendling <cwendling@hypra.fr> | 2023-05-02 20:50:52 +0200 |
|---|---|---|
| committer | Michael Weghorn <m.weghorn@posteo.de> | 2023-05-23 18:39:08 +0200 |
| commit | bd5c3582581f37513f45b518e348f443d5d57334 (patch) | |
| tree | 6e9bce540afb614154d695b6e3280a198254b089 /comphelper/source | |
| parent | dce8d2dbc48eb1c7597afec236dc51b4b8aede9c (diff) | |
a11y: Fix returning unpaired surrogates when retrieving characters
Fix implementations of XAccessibleText's getTextAtIndex(),
getTextBeforeIndex() and getTextBehindIndex() when called with
AccessibleTextType::CHARACTER to return the whole code point rather
than an unpaired surrogate.
This is still not perfect because XAccessibleText::getCharacterCount()
will return an incorrect value (code units rather than code points),
but it fixes the most useful case of retrieving the character at e.g.
the caret offset.
This fixes the GTK3 and Windows backends as well without further
changes. Qt6 also mostly works according to Michael Weghorn, but for a
bug on Qt's side (https://bugreports.qt.io/browse/QTBUG-113438).
MacOS backend doesn't seem to be affected in the first place.
Change-Id: I53f07bcba78c6b267939257542a521b106101e96
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/151303
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Diffstat (limited to 'comphelper/source')
| -rw-r--r-- | comphelper/source/misc/accessibletexthelper.cxx | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/comphelper/source/misc/accessibletexthelper.cxx b/comphelper/source/misc/accessibletexthelper.cxx index da39ac1ce252..06752ba88ded 100644 --- a/comphelper/source/misc/accessibletexthelper.cxx +++ b/comphelper/source/misc/accessibletexthelper.cxx @@ -297,9 +297,12 @@ namespace comphelper { if ( implIsValidIndex( nIndex, nLength ) ) { - aResult.SegmentText = sText.copy( nIndex, 1 ); + auto nIndexEnd = nIndex; + sText.iterateCodePoints(&nIndexEnd); + + aResult.SegmentText = sText.copy( nIndex, nIndexEnd - nIndex ); aResult.SegmentStart = nIndex; - aResult.SegmentEnd = nIndex+1; + aResult.SegmentEnd = nIndexEnd; } } break; @@ -401,9 +404,12 @@ namespace comphelper { if ( implIsValidIndex( nIndex - 1, nLength ) ) { - aResult.SegmentText = sText.copy( nIndex - 1, 1 ); - aResult.SegmentStart = nIndex-1; - aResult.SegmentEnd = nIndex; + sText.iterateCodePoints(&nIndex, -1); + auto nIndexEnd = nIndex; + sText.iterateCodePoints(&nIndexEnd); + aResult.SegmentText = sText.copy(nIndex, nIndexEnd - nIndex); + aResult.SegmentStart = nIndex; + aResult.SegmentEnd = nIndexEnd; } } break; @@ -525,9 +531,12 @@ namespace comphelper { if ( implIsValidIndex( nIndex + 1, nLength ) ) { - aResult.SegmentText = sText.copy( nIndex + 1, 1 ); - aResult.SegmentStart = nIndex+1; - aResult.SegmentEnd = nIndex+2; + sText.iterateCodePoints(&nIndex); + auto nIndexEnd = nIndex; + sText.iterateCodePoints(&nIndexEnd); + aResult.SegmentText = sText.copy(nIndex, nIndexEnd - nIndex); + aResult.SegmentStart = nIndex; + aResult.SegmentEnd = nIndexEnd; } } break; |