62783 - Implement default content in <children>

Status: RESOLVED FIXED

(Core :: XBL, enhancement, P3)

Description

[Dan Rosen]

When no <children> tag is given in the content for a binding, either all of the
content is substituted (when the bound element has no children) or none of it is
(when the bound element does have children). This concept of default anonymous
content is useful. But when a <children> tag *is* given, there is no way to
specify default content for when the bound element has no kids. So we want to
implement the following syntax:

<content>
  <!-- ... -->
  <children>
    <!-- default anonymous content, for if the bound element has no kids -->
  </children>
  <!-- ... -->
</content>

This lets us make buttons *always* have fancy borders (like the modern skin's 3d
effects) regardless of whether the button has content, or just a value
attribute; likewise, menuitems can have hyatt's Dancing Pandas (tm) without
sacrificing all the other fun chrome that goes along with being a menuitem.

Comment 1

[Dan Rosen]

adding bug 55292 as dependency. not necessarily true, but hey, it'd be nice to
have that working before this...

Comment 2

[Peter Trudelle]

->moz0.9

Comment 3

[Peter Trudelle]

->future

Comment 4

[David Hyatt]

I need this to implement the simplified tree syntax (see the bug on converting
<tree> to <listbox>).  Pulling in.

Comment 5

[David Hyatt]

Attachment: The patch

Comment 6

[David Hyatt]

Ready for r and sr.

Comment 7

[David Hyatt]

Attachment: A better patch

Comment 8

[Chris Waterson]

looks good, sr=waterson

Comment 9

[David Hyatt]

Fixed.