Bug 191023 – InputEvent.inputType should be "deleteSoftLineBackward" or "deleteSoftLineForward" rather than "deleteHardLineBackward" nor "deleteHardLineForward" when pressing Command + Backspace or Delete

• Status: NEW
• Component: HTML Editing

[Masayuki Nakano]

STR:
1. Load https://d-toybox.com/studio/lib/input_event_viewer.html
2. Choose "<div contenteditable>" from the radio buttons.
3. Shrink your Safari window as far as possible.
4. Type a long text *without* line breaks into the editor below the toolbars (blue solid border area) until you see a couple of lines.
5. Put a caret at middle of a line.
6. Press Command + Backspace.

Actual result:
I see "deleteHardLineBackward" value in dispatched "input"/"beforeinput" events (shown table in bottom of the page).

Expected result:
Those inputType values should be "deleteSoftLineBackward" because this operation removes from caret to the previous *visual* line break.

"deleteSoftLineBackword" is defined as:
> delete from the caret to the nearest visual line break before the caret position

"deleteHardLineBackword" is defined as:
> delete from the caret to the nearest beginning of a block element or br element before the caret position

https://w3c.github.io/input-events/#interface-InputEvent-Attributes

Chrome uses "deleteSoftLineBackward", and Firefox will use it.

[Wenson Hsieh]

Thanks for the report, Masayuki! Indeed, TypingDeleteLineBackward and TypingDeleteLineForward should dispatch input events of input type "deleteSoftLine(Backward|Forward)", since deletion is to the visual line break.

[Radar WebKit Bug Importer]

<rdar://problem/45647376>

[Ahmad Saleem]

https://searchfox.org/wubkat/rev/d4766b667963256e41db8c72a02613067074d834/Source/WebCore/editing/EditCommand.cpp#82

case EditAction::TypingDeleteLineBackward:
        return "deleteHardLineBackward"_s;
    case EditAction::TypingDeleteLineForward:
        return "deleteHardLineForward"_s;

@Wenson - do we have to update following only?