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Absolute-positioned elements should not be clipped by ancestors (accessibility) |
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Issue descriptionVersion: Chrome 65, probably all platforms. Does not reproduce in Chrome 63. To repro: 1. Open the attached HTML 2. Focus on the buttons while a screen reader or other AT is running The bounding box of the buttons should not be clipped by the ancestor element. Idea for fix: any element that's absolute-positioned (or other special positioning) should make its container the rootWebArea, that will ensure it doesn't get clipped by other ancestors.
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Dec 5 2017
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Dec 6 2017
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/9b4b71e58087875b5408dc5f91d18c4bb91969db commit 9b4b71e58087875b5408dc5f91d18c4bb91969db Author: Katie Dektar <katydek@google.com> Date: Wed Dec 06 19:25:41 2017 Fixes clipping on fixed and absolutely positioned elements. Fixed positioned elements are not clipped by their ancestors, except by the rootWebArea. Similarly with absolutely positioned elements, except if they have an ancestor with some non-static positioning. Bug: 792124 Change-Id: I9c31c90fed89179434ae7f89aa18528e929348da Reviewed-on: https://chromium-review.googlesource.com/809828 Commit-Queue: Katie D <katie@chromium.org> Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org> Cr-Commit-Position: refs/heads/master@{#522162} [modify] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/content/browser/accessibility/dump_accessibility_tree_browsertest.cc [add] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/content/test/data/accessibility/html/bounds-absolute-expected-blink.txt [add] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/content/test/data/accessibility/html/bounds-absolute.html [add] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/content/test/data/accessibility/html/bounds-fixed-expected-blink.txt [add] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/content/test/data/accessibility/html/bounds-fixed.html [modify] https://crrev.com/9b4b71e58087875b5408dc5f91d18c4bb91969db/third_party/WebKit/Source/modules/accessibility/AXObject.cpp
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Dec 6 2017
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Jan 10 2018
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May 23 2018
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Jun 15 2018
Google Chrome 68.0.3440.15 (Official Build) dev (64-bit) Firmware Version Google_Lulu.6301.136.57 Verified. Steps taken: # Load HTML file linked above # Use STS to put focus on large and small areas over the entire page, check the focus highlight # All focus highlights are appropriately sized |
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Comment 1 by katie@chromium.org
, Dec 5 2017