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fix(color-contrast): handle text that is outside overflow: hidden ancestor #4357

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merged 4 commits into from
Mar 12, 2024
Merged

fix(color-contrast): handle text that is outside overflow: hidden ancestor #4357

merged 4 commits into from
Mar 12, 2024

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straker
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@straker straker commented Mar 5, 2024

Closes: #4253

@straker straker requested a review from a team as a code owner March 5, 2024 17:12
WilcoFiers
WilcoFiers previously approved these changes Mar 7, 2024
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test/commons/dom/get-visible-child-text-rects.js
const node = fixture.querySelector('#target');
const actual = getVisibleChildTextRects(node);
const rect = getClientRects(node)[0];
const expected = new DOMRect(rect.left, rect.top, 25, rect.height);
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As far as addressing the issue this makes sense. But this example is odd. This element has no visible text, yet axe is deciding it does.

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After thinking and looking into it, I don't believe this is the correct solution. color-contrast-matches uses a function to determine if an element has visible text children, if it doesn't it moves it to inapplicable. So text nodes that fully start outside an overflow hidden ancestor are ignored. I think text nodes that are causing this bug should also be ignored in that case.

straker
straker commented Mar 12, 2024
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lib/commons/dom/get-visible-child-text-rects.js
return clientRects.length ? clientRects : [nodeRect];
return clientRects.length
? clientRects
: filterHiddenRects([nodeRect], overflowHiddenNodes);
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Decided to leave this in as a failsafe though it technically shouldn't be needed anymore

WilcoFiers
WilcoFiers previously requested changes Mar 12, 2024
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Editorial

lib/rules/color-contrast-matches.js Outdated Show resolved Hide resolved
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@straker straker merged commit bdb7300 into develop Mar 12, 2024
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@straker straker deleted the element-midpoint-text-hidden branch March 12, 2024 15:56
@attest-team-ci attest-team-ci mentioned this pull request Mar 25, 2024
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WilcoFiers added a commit that referenced this pull request Mar 25, 2024
@WilcoFiers
chore(release): v4.9.0 (#4380)
d847924 
##
[4.9.0](v4.8.4...v4.9.0)
(2024-03-25)

### Features

- adding the wcag131 tag to the aria-hidden-body rule
([#4349](#4349))
([dd4c3c3](dd4c3c3)),
closes [#4315](#4315)
- **checks:** deprecate aria-busy check
([#4356](#4356))
([be0b555](be0b555)),
closes [#4347](#4347)
[#4340](#4340)
- **color:** add color channel values and luminosity, saturation, clip
functions ([#4366](#4366))
([9e70199](9e70199)),
closes
[/github.com//pull/4365/files#r1517706612](https://github.com/dequelabs//github.com/dequelabs/axe-core/pull/4365/files/issues/r1517706612)
- **i18n:** add Greek Translations
([#3836](#3836))
([3ea9a48](3ea9a48))
- **i18n:** Add Italian translation
([#4344](#4344))
([de1baa9](de1baa9))
- **i18n:** Add Simplified Chinese translation
([#4379](#4379))
([bda7c8d](bda7c8d))
- **i18n:** Add Taiwanese Mandarin translation
([#4299](#4299))
([c5e11de](c5e11de))

### Bug Fixes

- Add LICENSE-3RD-PARTY.txt file
([#4304](#4304))
([daa0fe6](daa0fe6))
- add Object.values polyfill for node <=6
([#4274](#4274))
([5eb867b](5eb867b))
- **aria-required-children:** avoid confusing aria-busy message in
failures ([#4347](#4347))
([591607d](591607d)),
closes [#fail13](https://github.com/dequelabs/axe-core/issues/fail13)
[#4340](#4340)
- avoid reading element-specific node properties of non-element node
types ([#4317](#4317))
([b853b18](b853b18)),
closes [#4316](#4316)
[#4316](#4316)
- **color-contrast:** handle text that is outside `overflow: hidden`
ancestor ([#4357](#4357))
([bdb7300](bdb7300)),
closes [#4253](#4253)
- **color-contrast:** support color blend modes hue, saturation, color,
luminosity ([#4365](#4365))
([7ae4761](7ae4761))
- **d.ts:** RawNodesResult issues
([#4229](#4229))
([d660518](d660518))
- **d.ts:** RunOptions.reporter can be any string
([#4218](#4218))
([e53f5c5](e53f5c5))
- **i18n:** update Italian translations
([#4377](#4377))
([4d65d4b](4d65d4b))
- **listitem:** clarify roleNotValid message
([#4374](#4374))
([0f8a9af](0f8a9af))
- **scrollable-region-focusable:** missing wcag213 tag
([#4201](#4201))
([0080a72](0080a72))
- **target-size:** always pass 10x targets (avoid perf bottleneck)
([#4376](#4376))
([be327c4](be327c4))
- **target-size:** do not crash for nodes with many overlapping widgets
([#4373](#4373))
([1dbea83](1dbea83)),
closes [#4359](#4359)
[#4359](#4359)
[#4360](#4360)
- **utils/get-selector:** ignore 'xmlns' attribute when generating a
selector ([#4303](#4303))
([938b411](938b411))

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"Element midpoint exceeds the grid bounds"
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@straker @WilcoFiers