Bug 3729 – right/left arrow keys move forward/backward through document instead of right/left in RTL text

• Component: HTML Editing
• Status: RESOLVED FIXED

[Darin Adler]

Also in Radar as:

    <rdar://problem/4036353> RTL: arrow keys move insertion bar backwards in RTL text

Easy to reproduce by typing in some Hebrew text, and then using the arrow keys. You'll move forward/
back through the document rather than left/right through the visible text.

[Darin Adler]

My patch in bug 3710 has some relevant related changes, so it might be good to fix that bug first.

Raising to P1 since this causes a regression with the new text fields.

[Maciej Stachowiak]

These are all text field regressions so they should all be P1.

Here's one of the relatively simple cases that I just don't know how to solve (uppercase letters are RTL):

<div style="direction:ltr">
abcABC<span>DEF</span>
</div>

It is laid out as

abcFEDCBA

The primary caret positions, from left to right, should be:
div.text[0] div.text[1] div.text[2] div.text[3] span.text[2] span.text[1] span.text[0] div.text[5] div.text[4] span.text[3]

That last step, from div.text[4] to span.text[3] is the tricky one, and so is recognizing that span.text[3] is a rightmost position.

There is also a variant where there is another text node after the span, but that text node wraps to the next line.

[Justin Garcia]

Created attachment 10786 [details]
unfinished patch

Here's an unfinished patch written a while back by an Apple Engineer.

Fixed in <http://trac.webkit.org/changeset/32605>.

*** Bug 20612 has been marked as a duplicate of this bug. ***