static GtkStyleContext* StyleContext(
GtkStyleContext* parent,
GtkWidgetPath* path,
GType type,
const char* objectName,
const char* className1 = NULL,
const char* className2 = NULL)
{
gtk_widget_path_append_type(path, type);
#if GTK_CHECK_VERSION(3,20,0)
if (gtk_check_version(3,20,0) == NULL)
gtk_widget_path_iter_set_object_name(path, -1, objectName);
#endif
if (className1)
gtk_widget_path_iter_add_class(path, -1, className1);
if (className2)
gtk_widget_path_iter_add_class(path, -1, className2);
GtkStyleContext* sc = gtk_style_context_new();
gtk_style_context_set_path(sc, path);
if (parent)
{
#if GTK_CHECK_VERSION(3,4,0)
if (gtk_check_version(3,4,0) == NULL)
gtk_style_context_set_parent(sc, parent);
#endif
g_object_unref(parent);
}
return sc;
}
static void
gtk_text_handle_widget_style_updated (GtkWidget *widget,
GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv;
priv = handle->priv;
gtk_style_context_set_parent (gtk_widget_get_style_context (widget),
gtk_widget_get_style_context (priv->parent));
_gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START);
_gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END);
}
static GtkWidget *
_gtk_text_handle_ensure_widget (GtkTextHandle *handle,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
priv = handle->priv;
if (!priv->windows[pos].widget)
{
GtkWidget *widget, *window;
GtkStyleContext *context;
widget = gtk_event_box_new ();
gtk_event_box_set_visible_window (GTK_EVENT_BOX (widget), TRUE);
gtk_widget_set_events (widget,
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK);
gtk_widget_set_direction (widget, priv->windows[pos].dir);
g_signal_connect (widget, "draw",
G_CALLBACK (gtk_text_handle_widget_draw), handle);
g_signal_connect (widget, "event",
G_CALLBACK (gtk_text_handle_widget_event), handle);
g_signal_connect (widget, "style-updated",
G_CALLBACK (gtk_text_handle_widget_style_updated),
handle);
priv->windows[pos].widget = g_object_ref_sink (widget);
window = gtk_widget_get_ancestor (priv->parent, GTK_TYPE_WINDOW);
_gtk_window_add_popover (GTK_WINDOW (window), widget, priv->parent, FALSE);
context = gtk_widget_get_style_context (widget);
gtk_style_context_set_parent (context, gtk_widget_get_style_context (priv->parent));
gtk_css_node_set_name (gtk_widget_get_css_node (widget), I_("cursor-handle"));
if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_END)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
if (priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_INSERTION_CURSOR);
}
else
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
}
return priv->windows[pos].widget;
}
static GtkStyleContext *
create_context_for_path (GtkWidgetPath *path,
GtkStyleContext *parent)
{
GtkStyleContext *context;
context = gtk_style_context_new ();
gtk_style_context_set_path (context, path);
gtk_style_context_set_parent (context, parent);
/* Unfortunately, we have to explicitly set the state again here
* for it to take effect
*/
gtk_style_context_set_state (context, gtk_widget_path_iter_get_state (path, -1));
gtk_widget_path_unref (path);
return context;
}
static void StyleContextFree(GtkStyleContext* sc)
{
if (gtk_check_version(3,16,0) == NULL || gtk_check_version(3,4,0))
{
g_object_unref(sc);
return;
}
#if GTK_CHECK_VERSION(3,4,0)
// GTK+ < 3.16 does not properly handle freeing child context before parent
do {
GtkStyleContext* parent = gtk_style_context_get_parent(sc);
if (parent)
{
g_object_ref(parent);
gtk_style_context_set_parent(sc, NULL);
}
g_object_unref(sc);
sc = parent;
} while (sc);
#endif
}
static GtkStyleContext*
CreateCSSNode(const char* aName, GtkStyleContext *aParentStyle)
{
static auto sGtkWidgetPathIterSetObjectName =
reinterpret_cast<void (*)(GtkWidgetPath *, gint, const char *)>
(dlsym(RTLD_DEFAULT, "gtk_widget_path_iter_set_object_name"));
GtkWidgetPath* path =
gtk_widget_path_copy(gtk_style_context_get_path(aParentStyle));
gtk_widget_path_append_type(path, G_TYPE_NONE);
(*sGtkWidgetPathIterSetObjectName)(path, -1, aName);
GtkStyleContext *context = gtk_style_context_new();
gtk_style_context_set_path(context, path);
gtk_style_context_set_parent(context, aParentStyle);
gtk_widget_path_unref(path);
return context;
}
static GtkStyleContext *
get_style (GtkStyleContext *parent,
const char *selector)
{
GtkWidgetPath *path;
GtkStyleContext *context;
if (parent)
path = gtk_widget_path_copy (gtk_style_context_get_path (parent));
else
path = gtk_widget_path_new ();
append_element (path, selector);
context = gtk_style_context_new ();
gtk_style_context_set_path (context, path);
gtk_style_context_set_parent (context, parent);
gtk_widget_path_unref (path);
return context;
}
