185847 - Active Accessibility: get screen coordinates for word, both clipped and unclipped

Status: RESOLVED FIXED

(Core :: Disability Access APIs, defect)

Description

[Aaron Leventhal]

A screen magnification software vendor has asked to be able to get the screen
coordinates for a specific word, as opposed to the coordinates for an entire
node which may contain many words.

They want to know both the unclipped rectangle, and the rectangle clipped by the
window edge.

We'll probably have to put this on ISimpleDOMNode, or perhaps devise a new
interface for this and bug 185846.

Comment 1

[Aaron Leventhal]

Kyle, in GetCharacterExtents(), why do you use CreateRenderingContext() and
SetFont(), etc. rather than use nsIWidget::GetRenderingContext()? Is it more
correct?

Comment 2

[Kyle Yuan]

That is Simford's code.

Comment 3

[Simford]

Hi Aaron,
Is there anything wrong with that codes?
I thought the function "nsIWidget::GetRenderingContext()" also creates a rc object,
see the following link for details.
http://lxr.mozilla.org/seamonkey/source/widget/src/xpwidgets/nsBaseWidget.cpp#571

and we also need a call of SetFont() after that.

Comment 4

[Aaron Leventhal]

Okay Simford. Sorry for the "false alarm".

Comment 5

[Aaron Leventhal]

checked in as part of bug 185846

Comment 6

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1527381