We currently invalidate the whole tree every time the style state
changes in the tree view. The primary reason for this is to catch
default font changes as that may affect text cell renderers. But
cell renderers could *potentially* also read other style properties
(although that seems weird and unlikely).
We handle this by invalidating only when some state that affects sizes
is changed. This includes all the font properties.
With pango handling changes to the PangoLayout there now is no
style changes that can affect the layout for the entry, so we don't
have to reset the layout whenever the style is updated.
Now that Pango tracks changes to the context automatically there is
no need to do it manually in e.g. style-updated or direction-changed,
in fact the only case we have to care about is when we re-create
the PangoContext due to a screen change, so we only have to clear
the layouts in GtkLabel in screen-changed.
This means we're not clearing all the layouts whenever the state changes,
which happens to every widget when the window is unfocused, which helps
performance a lot.
https://bugzilla.gnome.org/show_bug.cgi?id=340066
Pango 1.32.4 has a feature where any PangoLayout automatically handles
the case where a PangoContext is changed. We want to rely on this to
avoid having to clear layouts too often, so we make this a hard dep.
This is for a very simple reason: The getter is returning a const value
and the font isn't const anymore. So we need to store the font
description somewhere but we can't reuse it as it's changing all the
time (yay animations, yay inherited values). Sucks.
So keep the hack in here but deprecate the function.
Instead of using gtk_style_context_get_font() in
pango_context_get_metrics(), use pango_context_get_font_description().
The context contains the font description we are about to use after all.
This is necessary because values in a GtkCssComputedValues can change
now. So if the font-size is inherited or animated, the cached value will
be outdated.
Fixes the fontchooser preview not updating.
This means reffing the root in the set property implementation,
rather than in the constructor. We don't need to unref the root
on set, as it's a CONSTRUCT_ONLY property.
https://bugzilla.gnome.org/show_bug.cgi?id=680065
GtkWindow always queues a resize on style updates if there is
a grip, because it may have been the grip size style properties
that changed. However, even if it *were*, and it likely wasn't
that would not affect the windows size request, so no need
to queue a resize.
queue_resize basically tells the parent widget that it may need
to pick a different size/layout. However, for a hidden child widget
that should never be needed. It may be that the widget is in a
sizegroup that has ignore_hidden == FALSE though, so it may
affect the size group calculations.
However, if a widget is not visible and not in a size group then
its safe to avoid the resize, as the widget will be resized on
becoming visible anyway.
This avoids a lot of size allocation for hidden things like menus
and tooltips.
Almost all array computations lead to no changes (99% in nautilus)
so we avoid the upfront allocation and delay it until we know its
needed. This drops the allocate/free from the profile.
These are internal apis, and any external issues should have been
caught by checks at public API points. We use the internal checks
here because these checks show up in a non-neglible way on profiles.
pasteboardChangedOwner is not called as reliably as we'd want to get it,
so keep track of [pasteboard changeCount] and drop clipboard ownership
when a change happened. Also better unset the clipboard content redundantly
in a few places rather than missing one, and reorder the code in
gtk_clipboard_set_contents() so that the new aggressive unsetting
won't unset the clipboard under our feet when we call
[pasteboard declareTypes].
(cherry picked from commit f2b74db5dc)
We now support the keywords (like xx-small, medium, larger, smaller...)
and I've changed the default value to be "medium".
This required some shuffling of the "get default font size" code. But
all is well now.
The default font is no longer handled like a custom style sheet that
overrides everything, but as the initial value. This is the same
behavior as in web browsers.
And it allows the theme to actually use the 'font-family' and
'font-size' properties. Of course, a well behaved theme will respect the
setting as much as possible and for example use relative font sizes
(which aren't yet supported, but will be soon).
This gives a GtkSettings object for resolving system-dependant things -
like the default font family and font size.
No code does this yet, but we have an API.
Only GtkSettings implements this.
