We've started to turns containers into widgets which
just happen to have children, and some of these need
to be exposed to the a11y stack.
This adds a very minimal implementation, it does not
currently emit change notification when children are
added or removed.
When we dismantle our children in dispose, we
trigger a11y children-changed signals which end
up calling back into the notebook. Handle this
without critical warnings.
Only update the action state when we have a text buffer,
there is no need to do it otherwise, since we are going
to get a buffer before we get shown. This avoids triggering
the action state updates from finalize, which is a bad
time to be recreating the action muxer.
The accessible gets properties of the entry, and
resetting the entry icons triggers accessible change
notification, so do that before we dismantle the entry
too far to respond to a g_object_get () call.
1. Rename the thing
2. Turn it from a signal to a vfunc
3. Pass the GtkCssStyleChange to it
We don't export any public API about the GtkCssStyleChange yet, it's
just a boring opaque struct.
Instead, rely on people passing fallbacks explicitly.
Alternatively, GThemedIcon provides the functionality to create
fallbacks, which is what GtkImage and the testsuite now use.
That method is slightly better, too, so the expected test results
have been updated accordingly.
There is no way to query contexts or do anything useful with them.
So don't keep track of them and don't make them an argument in public
APIs with the docs saying "I don't know what to use here, maybe read
some spec somewhere".
Those functions are unused and the documentation says "Returns some
random number that the icon theme creator chose" which does not seem at
all useful and an implementation detail.
So get rid of it.
We expose no API to get at any colors for drawing symbolics, so we
shouldn't have APIs to draw with them.
Apart from that, those APIs look like a box of crayons, not like an
icontheme.
Most users were just forgetting to set the proper flags.
And flags aren't the right way to set this anyway, it was just
acceptable as a workaround during GTK3 to not break API.
The API encouraged wrong usage - most of the users were indeed wrong.
Use the correct version instead:
gtk_icon_theme_get_for_display (gtk_widget_get_display ())
Fix up the index computation. We have duplicate entries
in the type enum, so to go from one of the 'initial' types
to it corresponding type you subtract one, but to find
the size array entry for a type, you divide by 2.
It turns out with the icon cache now using the virtual SYMBOLIC_PNG_SUFFIX
flag the two enums are now identical, so lets just use one of them, the
one GtkIconCache (so we move it to the header).
This is a useful widget to have, and it has minimal api.
Not having it public forces apps to recreate a lot of
complicated machinery for not good reason, if they need
an Emoji chooser in a different context.
