Insertion point does not show when dragging text into an editable area

[Simon Fraser (smfr)]

65681 caused the caret to use the last-computed caret rect when painting, rather than forcing a style update. That seems to have changed the drawing of the insertion caret during drag and drop. This affects the pixel results of this test: editing/selection/drag-in-iframe.html

[Simon Fraser (smfr)]

<rdar://problem/8335352>

[Simon Fraser (smfr)]

My patch fixes the bug interactively, but the caret still doesn't get captured in the pixel result.

Interactively, DragController::doSystemDrag() blocks in m_client->startDrag() until the drag is complete.

In DRT, it seems to return immediately, so cleanupAfterSystemDrag() resets the drag caret to empty, before the snapshot is taken.

[Simon Fraser (smfr)]

Created attachment 65769 [details]
Patch

[Enrica Casucci]

Comment on attachment 65769 [details]
Patch

> diff --git a/WebCore/ChangeLog b/WebCore/ChangeLog
> index c8f9bcf61fa93600c1aac821e070adcb3f67a2d9..95357b5dda1f94c6d24ea0838d6d22645fb4a4f8 100644
> --- a/WebCore/ChangeLog
> +++ b/WebCore/ChangeLog
> @@ -1,5 +1,26 @@
>  2010-08-27  Simon Fraser  <[e-mail]>
>  
> +        Reviewed by NOBODY (OOPS!).
> +
> +        Insertion point does not show when dragging text into an editable area
> +        https://bugs.webkit.org/show_bug.cgi?id=44295
> +        
> +        r65681 caused the caret to use the last-computed caret rect when
> +        painting, rather than forcing a style update. Because of this,
> +        we now need to eagerly update the caret rect when changing
> +        the drag selection.
> +        
> +        Not testable in DRT because the drag selection is always cleared
> +        before EventSender returns, so the drag caret can never show in
> +        the pixel results.
> +
> +        Tested by running editing/selection/drag-in-iframe.html manually.
> +
> +        * editing/SelectionController.cpp:
> +        (WebCore::SelectionController::setSelection):
> +
> [phone]  Simon Fraser  <[e-mail]>
> +
>          Reviewed by Tony Chang.
>  
>          Crash in CSSStyleSelector.cpp
> diff --git a/WebCore/editing/SelectionController.cpp b/WebCore/editing/SelectionController.cpp
> index 3672e3e757bfdd87f40395e46004e4dab17e220d..97dde55e3cde543ccf23ea6344de4249ec8311ed 100644
> --- a/WebCore/editing/SelectionController.cpp
> +++ b/WebCore/editing/SelectionController.cpp
> @@ -118,6 +118,7 @@ void SelectionController::setSelection(const VisibleSelection& s, bool closeTypi
>          m_selection = s;
>          m_caretRectNeedsUpdate = true;
>          invalidateCaretRect();
> +        updateCaretRect();
>          return;
>      }
>      if (!m_frame) {

Looks good to me.

[Simon Fraser (smfr)]

http://trac.webkit.org/changeset/66269