When we are loading symbolic pngs or svgs, we know
that we need to the png or svg loader, so there is
no need to go through (surprisingly expensive) mime
sniffing to find the right loader.
Replace uses of gtk_css_style_get_value with direct access,
throughout the tree. We don't replace all uses, just those
where we are dealing with a fixed property. Be careful to
handle the currentColor special case for color properties.
The differenciation between a literal color value and an RGBA value
caused problems in various situations. Just treat the two the same but
don't allow access to the rgba value of a non-literal color value.
This gets rid of around 1.6k rgba values in the widget-factory.
We don't want to return a GFile because GFile can't handle can't deal
with data: urls.
That makes the code a bit more complicated that doesn't deal with those
URLs, but it makes the other code actually work.
GtkCssImageUrl also now decodes data urls immediately instead of only at
the first load. So don't use data urls if you care about performance.
This library is meant to be the new CSS library that gets used from GDK,
GSK and GTK for string printing and parsing.
As a first step, move GtkCssProviderError into it.
While doing so, split it into GtkCssParserError (for critical problems)
and GtkCssParserWarning (for non-critical problems).
Use the same approach we take for recoloring in GtkIconHelper now.
As part of this change, GtkCsSImageRecolor is changed to not derive
from GtkCssImageUrl anymore.
This is just lots of renaming.
The interface remains private, so the public API does not change, apart
from removing the definition of the Interface object to avoid
subclassing.
Instead of spamming stderr with g_warning, use the new
emit_error method of the GtkStyleProviderPrivate interface
to emit an error if loading an image fails.
We should not hardcode a scale of 1, this leads to
pixellated upscaled images at scale=2, even if the source
is an svg. By passing the proper scale, we can load the
svg at the correct size.
If we fail to load the image for a -gtk-recolor() expression,
fall back to using the image-missing icon instead of crashing,
and include more details in the warning message.
