Bug 162167 – Remove ENABLE(TEXT_AUTOSIZING) automatic text size adjustment code

• Component: CSS
• Status: RESOLVED FIXED

[Daniel Bates]

Currently WebKit contains two implementations for automatic text-size adjustment guarded by ENABLE(TEXT_AUTOSIZING) and ENABLE(IOS_TEXT_AUTOSIZING). As far as I can tell TEXT_AUTOSIZING is not enabled on any port and its code is likely stale given that it is not enabled on any port. On Mac and iOS, WebKit is built with IOS_TEXT_AUTOSIZING enabled. We should remove all the ENABLE(TEXT_AUTOSIZING) code as it is unused.

For completeness, ENABLE(TEXT_AUTOSIZING) was added as part of the work for bug #84186. There has also been an effort to standardize the IOS_TEXT_AUTOSIZING behavior as part of the CSS Mobile Text Size Adjustment Module Level 1 spec., <https://drafts.csswg.org/css-size-adjust/>.

[Daniel Bates]

Created attachment 289240 [details]
Patch

[Daniel Bates]

Assuming it is acceptable to remove the ENABLE(TEXT_AUTOSIZING) code. Then I will close  bug #84186 and all its child bugs as Resolved Invalid (is a more appropriate status to use?).

[Michael Catanzaro]

I would use Resolved Wontfix, but it doesn't matter much.

[Daniel Bates]

Created attachment 289248 [details]
Patch

Revert inadvertent removal of files TextAutosizing.{cpp, h} from the WebCore Xcode project. These files are used by the iOS automatic text size adjustment code.

[Build Bot]

Comment on attachment 289248 [details]
Patch

Attachment 289248 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/2107456

New failing tests:
fast/text-autosizing/ios/line-height-text-autosizing.html

[Build Bot]

Created attachment 289254 [details]
Archive of layout-test-results from ews124 for ios-simulator-elcapitan-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews124  Port: ios-simulator-elcapitan-wk2  Platform: Mac OS X 10.11.6

[Daniel Bates]

Committed r206119: <http://trac.webkit.org/changeset/206119>

[Daniel Bates]

(In reply to comment #5)
> Comment on attachment 289248 [details]
> Patch
> 
> Attachment 289248 [details] did not pass ios-sim-ews (ios-simulator-wk2):
> Output: http://webkit-queues.webkit.org/results/2107456
> 
> New failing tests:
> fast/text-autosizing/ios/line-height-text-autosizing.html

I updated LayoutTests/platform/ios-simulator/TestExpectations to mark this test as Failure before landing the patch for this bug. This test began failing with attachment #289248 [details] because I removed the Failure entry for fast/text-autosizing/ios/line-height-text-autosizing.html from the WK1/WK2 TestExpectations. I filed bug #162236 to investigate the failure of this test on iOS.