[gtk/wip/matthiasc/shortcut-2] shortcutmanager: Add a trigger lookup function

[Matthias Clasen <matthiasc src gnome org>]

commit 6c44b6bc80c64a3be1f38c3f01ff06a1c25e8eb7
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Mar 23 14:45:38 2020 -0400

    shortcutmanager: Add a trigger lookup function
    
    This function finds a trigger, given a shortcut action
    and a target widget.

 gtk/gtkshortcutmanager.c | 38 ++++++++++++++++++++++++++++++++++++++
 gtk/gtkshortcutmanager.h |  4 ++++
 2 files changed, 42 insertions(+)
---
diff --git a/gtk/gtkshortcutmanager.c b/gtk/gtkshortcutmanager.c
index 625e594d84..f73a32c521 100644
--- a/gtk/gtkshortcutmanager.c
+++ b/gtk/gtkshortcutmanager.c
@@ -22,6 +22,7 @@
 #include "gtkshortcutmanager.h"
 #include "gtkshortcutmanagerprivate.h"
 #include "gtkflattenlistmodel.h"
+#include "gtkshortcut.h"
 
 /**
  * SECTION:gtkshortcutmanager
@@ -121,3 +122,40 @@ gtk_shortcut_manager_default_init (GtkShortcutManagerInterface *iface)
   iface->remove_controller = gtk_shortcut_manager_default_remove_controller;
 }
 
+GtkShortcutTrigger *
+gtk_shortcut_manager_get_trigger (GtkShortcutManager *self,
+                                  GtkShortcutAction  *action,
+                                  GtkWidget          *widget)
+{
+  GtkPropagationPhase phase[2] = { GTK_PHASE_CAPTURE, GTK_PHASE_BUBBLE };
+  int i;
+
+  for (i = 0; i < 2; i++)
+    {
+      GListModel *model;
+
+      model = G_LIST_MODEL (gtk_shortcut_manager_get_model (self, phase[i]));
+      if (model)
+        {
+          for (i = 0; i < g_list_model_get_n_items (model); i++)
+            {
+              GtkShortcut *shortcut;
+
+              shortcut = g_list_model_get_item (model, i);
+              g_object_unref (shortcut);
+
+              if (gtk_shortcut_action_equal (action, gtk_shortcut_get_action (shortcut)))
+                {
+                  GListModel *child_model = gtk_flatten_list_model_get_model_for_item 
(GTK_FLATTEN_LIST_MODEL (model), i);
+                  if (GTK_IS_SHORTCUT_CONTROLLER (child_model))
+                    {
+                      if (widget == gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (child_model)))
+                        return gtk_shortcut_get_trigger (shortcut);
+                    }
+                }
+            }
+        }
+    }
+
+  return NULL;
+}
diff --git a/gtk/gtkshortcutmanager.h b/gtk/gtkshortcutmanager.h
index 0d4ece9745..c60edb994d 100644
--- a/gtk/gtkshortcutmanager.h
+++ b/gtk/gtkshortcutmanager.h
@@ -65,6 +65,10 @@ struct _GtkShortcutManagerInterface
                                                          GtkShortcutController        *controller);
 };
 
+GtkShortcutTrigger *
+gtk_shortcut_manager_get_trigger        (GtkShortcutManager     *self,
+                                         GtkShortcutAction      *action,
+                                         GtkWidget              *widget);
 
 G_END_DECLS