Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: ac57d4f365e1de0dfe1e90fed2b22c67e10cdac8
      
https://github.com/WebKit/WebKit/commit/ac57d4f365e1de0dfe1e90fed2b22c67e10cdac8
  Author: Wenson Hsieh <wenson_hs...@apple.com>
  Date:   2024-04-05 (Fri, 05 Apr 2024)

  Changed paths:
    A 
LayoutTests/editing/input/ios/autocorrection-replaces-space-with-period-expected.txt
    A 
LayoutTests/editing/input/ios/autocorrection-replaces-space-with-period.html
    M Source/WebCore/editing/TextIterator.cpp

  Log Message:
  -----------
  REGRESSION (275503@main): Double space in Mail compose on iOS doesn’t insert 
period
https://bugs.webkit.org/show_bug.cgi?id=272237
rdar://125852636

Reviewed by Abrar Protyasha and Ryosuke Niwa.

With the changes in 275503@main, we now use `WebCore::findPlainText` to 
discover the nearby text to
replace, in the case where the replacement range isn't just the last word. 
While `findPlainText`
(and the underlying `SearchBuffer` machinery) is intended to ignore 
non-breaking spaces for the
purposes of finding matches, this only works when `UCONFIG_NO_COLLATION` is 
disabled; otherwise,
searching for the target text `" "` against a single non-breaking space 
`"0xA0"` will fail to find
any matches.

This subsequently causes autocorrection replacement to fail, in the case where 
UIKit tries to
replace a space after a sentence with a period, when the user inserts two space 
characters in a row,
since we fail to match the non-breaking space character right after the word.

To fix this, we align the two find behaviors by moving the 
`UCONFIG_NO_COLLATION`-specific logic to
handle `nbsp`:

```
inline void SearchBuffer::append(UChar c, bool isStart)
{
    …

    m_buffer[m_cursor] = c == noBreakSpace ? ' ' : foldQuoteMark(c);
}
```

...into `foldQuoteMark`, renaming that helper function to 
`foldQuoteMarkAndReplaceNoBreakSpace`, and
finally deploying `foldQuoteMarkAndReplaceNoBreakSpace` in the 
`!UCONFIG_NO_COLLATION` codepath as
well.

Test: editing/input/ios/autocorrection-replaces-space-with-period.html

* 
LayoutTests/editing/input/ios/autocorrection-replaces-space-with-period-expected.txt:
 Added.
* LayoutTests/editing/input/ios/autocorrection-replaces-space-with-period.html: 
Added.
* Source/WebCore/editing/TextIterator.cpp:
(WebCore::foldQuoteMarkAndReplaceNoBreakSpace):
(WebCore::SearchBuffer::append):
(WebCore::foldQuoteMark): Deleted.

Canonical link: https://commits.webkit.org/277151@main



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