Fix text range logic for a11y #16496
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gaaclarke
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Feb 7, 2020
| @@ -28,3 +28,7 @@ | |||
| EXPECT_EQ(result.location, 0UL); | |||
| EXPECT_EQ(result.length, 0UL); | |||
| } | |||
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| TEST(StringRangeSanitizationTest, HandlesEndOfRange) { | |||
| EXPECT_EQ(fml::RangeForCharacterAtIndex(@"1234", 4).location, 4UL); | |||
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please add assert for the NSRange.length too
gaaclarke
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Feb 7, 2020
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* c932214 Ensure fields of Rect and OffsetBase classes are optimized as non-null. (flutter/engine#16465) * 5c70356 Simplify task queues locking mechanism (flutter/engine#16477) * d589dde Fix text range logic for a11y (flutter/engine#16496) * 1a4f4e3 Fix unused import in Android embedder (flutter/engine#16494) * 964ae10 Disable ShellTest.WaitForFirstFrameTimeout on Fuchsia (flutter/engine#16495) * 6158f03 Roll src/third_party/skia 87e3bef6f82f..9f3eef796f63 (7 commits) (flutter/engine#16493)
NoamDev
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Feb 27, 2020
Make sure that a text range at the end of the string is still valid.
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Feb 27, 2020
This reverts commit 7866595.
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see also: #8747
The linked PR unintentionally introduced a bug in text range handling where we treated a text range with a location at the end of the string as invalid. This should not be the case.
This resulted in a crash in a11y on iOS when you entered text, the cursor is at the end of the field, and you tap.
This app can reproduce the issue with VoiceOver on:
Fortunately, the FML change doesn't break any of the original tests - I think it was just an oversight at the time, the other FML method handles cases like this correctly.
/cc @jkurtw @mehmetf @chingjun - this fixes b/149077991