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namespace Astal {
private class Css {
private static HashTable<Gtk.Widget, Gtk.CssProvider> _providers;
public static HashTable<Gtk.Widget, Gtk.CssProvider> providers {
get {
if (_providers == null) {
_providers = new HashTable<Gtk.Widget, Gtk.CssProvider>(
(w) => (uint)w,
(a, b) => a == b);
}
return _providers;
}
}
}
private void remove_provider(Gtk.Widget widget) {
var providers = Css.providers;
if (providers.contains(widget)) {
var p = providers.get(widget);
widget.get_style_context().remove_provider(p);
providers.remove(widget);
p.dispose();
}
}
public void widget_set_css(Gtk.Widget widget, string css) {
var providers = Css.providers;
if (providers.contains(widget)) {
remove_provider(widget);
} else {
widget.destroy.connect(() => {
remove_provider(widget);
});
}
var style = !css.contains("{") || !css.contains("}")
? "* { ".concat(css, "}") : css;
var p = new Gtk.CssProvider();
widget.get_style_context()
.add_provider(p, Gtk.STYLE_PROVIDER_PRIORITY_USER);
try {
p.load_from_data(style, style.length);
providers.set(widget, p);
} catch (Error err) {
warning(err.message);
}
}
public string widget_get_css(Gtk.Widget widget) {
var providers = Css.providers;
if (providers.contains(widget))
return providers.get(widget).to_string();
return "";
}
public void widget_set_class_names(Gtk.Widget widget, string[] class_names) {
foreach (var name in widget_get_class_names(widget))
widget_toggle_class_name(widget, name, false);
foreach (var name in class_names)
widget_toggle_class_name(widget, name, true);
}
public List<weak string> widget_get_class_names(Gtk.Widget widget) {
return widget.get_style_context().list_classes();
}
public void widget_toggle_class_name(
Gtk.Widget widget,
string class_name,
bool condition = true
) {
var c = widget.get_style_context();
if (condition)
c.add_class(class_name);
else
c.remove_class(class_name);
}
private class Cursor {
private static HashTable<Gtk.Widget, string> _cursors;
public static HashTable<Gtk.Widget, string> cursors {
get {
if (_cursors == null) {
_cursors = new HashTable<Gtk.Widget, string>(
(w) => (uint)w,
(a, b) => a == b);
}
return _cursors;
}
}
}
private void widget_setup_cursor(Gtk.Widget widget) {
widget.add_events(Gdk.EventMask.ENTER_NOTIFY_MASK);
widget.add_events(Gdk.EventMask.LEAVE_NOTIFY_MASK);
widget.enter_notify_event.connect(() => {
widget.get_window().set_cursor(
new Gdk.Cursor.from_name(
Gdk.Display.get_default(),
Cursor.cursors.get(widget)));
return false;
});
widget.leave_notify_event.connect(() => {
widget.get_window().set_cursor(
new Gdk.Cursor.from_name(
Gdk.Display.get_default(),
"default"));
return false;
});
widget.destroy.connect(() => {
if (Cursor.cursors.contains(widget))
Cursor.cursors.remove(widget);
});
}
public void widget_set_cursor(Gtk.Widget widget, string cursor) {
if (!Cursor.cursors.contains(widget))
widget_setup_cursor(widget);
Cursor.cursors.set(widget, cursor);
}
public string widget_get_cursor(Gtk.Widget widget) {
return Cursor.cursors.get(widget);
}
}
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