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actor: Create a PangoContext per actor

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For a variety of complicated reasons, ClutterText currently sets fields
on the PangoContext when creating a layout. This causes ClutterText to
behave somewhat erratically in certain cases, since the PangoContext is
currently shared between all actors.

GTK+ creates a PangoContext for every single GtkWidget, so it seems like
we should do the same here.

Move the private code that was previously in clutter-main.c into
clutter-actor.c and clean it up a bit. This gives every actor its own
PangoContext it can mutilate whenever it wants, at its heart's content.

https://bugzilla.gnome.org/show_bug.cgi?id=739050
This commit is contained in:
Jasper St. Pierre
2014-10-22 18:44:22 -07:00
parent 14d28e7908
commit 46877cc2bd
3 changed files with 60 additions and 88 deletions
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80
clutter/clutter-main.c
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@ -764,86 +764,6 @@ clutter_get_text_direction (void)
return dir;
}
static void
update_pango_context (ClutterBackend *backend,
PangoContext *context)
{
ClutterSettings *settings;
PangoFontDescription *font_desc;
const cairo_font_options_t *font_options;
gchar *font_name;
PangoDirection pango_dir;
gdouble resolution;
settings = clutter_settings_get_default ();
/* update the text direction */
if (clutter_text_direction == CLUTTER_TEXT_DIRECTION_RTL)
pango_dir = PANGO_DIRECTION_RTL;
else
pango_dir = PANGO_DIRECTION_LTR;
pango_context_set_base_dir (context, pango_dir);
g_object_get (settings, "font-name", &font_name, NULL);
/* get the configuration for the PangoContext from the backend */
font_options = clutter_backend_get_font_options (backend);
resolution = clutter_backend_get_resolution (backend);
font_desc = pango_font_description_from_string (font_name);
if (resolution < 0)
resolution = 96.0; /* fall back */
pango_context_set_font_description (context, font_desc);
pango_cairo_context_set_font_options (context, font_options);
pango_cairo_context_set_resolution (context, resolution);
pango_font_description_free (font_desc);
g_free (font_name);
}
PangoContext *
_clutter_context_get_pango_context (void)
{
ClutterMainContext *self = _clutter_context_get_default ();
if (G_UNLIKELY (self->pango_context == NULL))
{
PangoContext *context;
context = _clutter_context_create_pango_context ();
self->pango_context = context;
g_signal_connect (self->backend, "resolution-changed",
G_CALLBACK (update_pango_context),
self->pango_context);
g_signal_connect (self->backend, "font-changed",
G_CALLBACK (update_pango_context),
self->pango_context);
}
else
update_pango_context (self->backend, self->pango_context);
return self->pango_context;
}
PangoContext *
_clutter_context_create_pango_context (void)
{
CoglPangoFontMap *font_map;
PangoContext *context;
font_map = clutter_context_get_pango_fontmap ();
context = cogl_pango_font_map_create_context (font_map);
update_pango_context (clutter_get_default_backend (), context);
pango_context_set_language (context, pango_language_get_default ());
return context;
}
/**
* clutter_main_quit:
*