306918 - Button-up events not consumed by modal operations

Status: RESOLVED INCOMPLETE

(Core Graveyard :: Widget: Mac, defect)

Description

[Rich Walsh]

When dragging a link or when using click-and-hold to display its menu, releasing
the mouse button while still over that link will cause the link to be followed.

Steps to reproduce:
* drag and drop - point at the left end of a link & move the mouse rightward
until d&d mode is entered; release the mouse button while still over the link;
a new page will be displayed
* click & hold menus - hold the button long enough for the menu to display, then
release it while still over the link;  a new page will be displayed but the menu
will remain in place

Expected results:
* drag and drop - nothing should happen because nsContentAreaDragDrop explicitly
disallows drops that originated within the same content
* click and hold menus - nothing should happen:  the menu should continue to be
displayed below the link it relates to

Apparently, the button-up event is not being consumed by the d&d & menu code and
is being redispatched.

Notes:
* This was originally identified as a Mac-only "feature" in Bug #303300.  This
new bug has been filed to characterize it more appropriately and better describe
the problem.
* I tested this using Firefox 1.0.3 under OS X v10.4.2.  Since the machine
wasn't mine, I couldn't test it using a current build.  In Bug #303300, the
problem was reported to be present in a trunk build from August 3rd.
* This error doesn't occur under Win XP or OS/2.

Comment 1

[Simon Fraser [no longer active]]

Related to bug 312591?