Bug 164391 – REGRESSION (r208248): Web Inspector: Pressing Left Arrow breaks autocomplete

• Component: Web Inspector
• Status: RESOLVED FIXED

[Nikita Vasilyev]

Steps:
1. Open Console.
2. Type "a"
3. Press Arrow Down key.
4. Press Arrow Left key.
5. Erase console prompt (by pressing Cmd+A and Delete, for example).
6. Type "a".

Expected:
a|ddEventListener (Autocomple still works)


Actual:
a| (Autocomplete doesn't work any more)

Notes:
This is a recent regression. It works as expected in Safari Technology Preview 16.

[Radar WebKit Bug Importer]

<rdar://problem/29102408>

[Nikita Vasilyev]

Created attachment 293838 [details]
[Animated GIF] Bug

[Nikita Vasilyev]

This regressed in https://trac.webkit.org/changeset/208248,
which in turn was supposed fix another autocomplete regression.

[Nikita Vasilyev]

Created attachment 294887 [details]
Patch

Unroll r208248.

[Nikita Vasilyev]

Created attachment 294888 [details]
[Animated GIF] With patch applied

[Nikita Vasilyev]

Created attachment 294890 [details]
Patch

[Matt Baker]

Comment on attachment 294890 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=294890&action=review

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:164
> +        delete this._ignoreNextCursorActivity;

Why were the two remaining properties changed to delete?

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:250
> +        var container = document.createElement("span");

Nit: let

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:251
> +        container.classList.add(WebInspector.CodeMirrorCompletionController.CompletionHintStyleClassName);

Since the class name was removed from CodeMirrorCompletionController.prototype._applyCompletionHint I think we can just inline the class name.

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:273
> +            var currentText = this._codeMirror.getRange(from, cursor);

Why did these change from let to var?

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:283
> +        delete this._ignoreChange;

Why the change?

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:322
> +        var history = this._codeMirror.getHistory();

Nit: let

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:381
> +        delete this._ignoreChange;

Why the change?

> Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorCompletionController.js:835
> +            delete this._ignoreNextCursorActivity;

Same as above.

[Matt Baker]

Doh! Nevermind.

[WebKit Commit Bot]

Comment on attachment 294890 [details]
Patch

Clearing flags on attachment: 294890

Committed r208774: <http://trac.webkit.org/changeset/208774>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.