I attempt to fix but I could not.
Here is what I did: http://crrev.com/2750503013

Unit tests may be useful.

Simple tool for this issue: https://jsfiddle.net/3pykkjzd/

Current implementation is broken, in following example, we get anchorOffset=0 instead of anchorOffset=7

Example 1: anchorOffset should be 7
<div id="sample" contenteditable>abc<div dir="rtl">def</div>ghi|</div>

Example 2: anchorOffset should be 0
<div id="sample" contenteditable>abc<div dir="rtl">|def</div>ghi</div>

The repro in #0 only works on Win

To repro on Linux:

Open https://jsfiddle.net/moL9779r/1/, put caret at the end of "abc ", and press Ctrl+Right

Issue 697781 has been merged into this issue.

WebKit implements computeInlineBoxPosition() as Position::getInlineBoxAndOffset()[1]

[1] https://trac.webkit.org/browser/webkit/trunk/Source/WebCore/dom/Position.cpp

Lower to Pri-2, since this issue exists long time and I found this in these days.

 Issue 576384  has been merged into this issue.

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

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