https://bugzilla.wikimedia.org/show_bug.cgi?id=51472
Web browser: ---
Bug ID: 51472
Summary: VisualEditor: backspace deletes combined character
clusters together with diacritics (Hindi, Arabic,
Hebrew and other languages)
Product: VisualEditor
Version: unspecified
Hardware: All
OS: All
Status: NEW
Keywords: i18n
Severity: normal
Priority: Unprioritized
Component: ContentEditable
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Classification: Unclassified
Mobile Platform: ---
Some scripts, among them Arabic, Hebrew, and most scripts of India and SE Asia,
are written as combinations of consonants and vowel marks that combine with
them.
In most text editors and word processors, when the cursor is after a
combination of a consonant and a vowel, and the backspace key s pressed, the
vowel is deleted first and the the consonant.
For example if you have the Devanagari combination गा (ग [g] + ा [a]), these
are two Unicode characters, which the font joins automatically. If the cursor
is after them and you press the backspace key, then the second character ( ा)
is supposed to be deleted, and only then the first (ग). That is what happens in
most text editors, including MediaWiki's source editor.
In the VisualEditor, backspace immediately deletes the whole cluster. This
behavior is unexpected for most users.
To complicate things, when the cursor is before the combined character and the
Delete key is pressed, the expected behavior is to delete the whole cluster.
This is what happens in the VisualEditor now, and this must be kept like that.
For cursor movement, back and forth, the cluster must also be treated as one
character, so if the cursor is before गा and the right-pointing arrow is
pressed, the cursor is supposed to immediately go after the गा. This also works
correctly now, and must be kept.
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