[gnome-text-editor] window: add window keybindings for zoom control

[Christian Hergert <chergert src gnome org>]

commit f5eacf1c23930b54465a76d7d5e466728e8a8154
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 8 14:32:39 2021 -0800

    window: add window keybindings for zoom control
    
    This ensures that they will work outside of the source view.
    
    Fixes #246

 src/editor-window.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/editor-window.c b/src/editor-window.c
index 806ea45..9634799 100644
--- a/src/editor-window.c
+++ b/src/editor-window.c
@@ -791,6 +791,13 @@ editor_window_class_init (EditorWindowClass *klass)
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_comma, GDK_CONTROL_MASK, 
"win.show-preferences", NULL);
   gtk_widget_class_add_binding_action (widget_class, GDK_KEY_question, GDK_CONTROL_MASK, 
"win.show-help-overlay", NULL);
 
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_plus, GDK_CONTROL_MASK, "page.zoom-in", NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_Add, GDK_CONTROL_MASK, "page.zoom-in", NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_equal, GDK_CONTROL_MASK, "page.zoom-in", NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_minus, GDK_CONTROL_MASK, "page.zoom-out", NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_0, GDK_CONTROL_MASK, "page.zoom-one", NULL);
+  gtk_widget_class_add_binding_action (widget_class, GDK_KEY_KP_0, GDK_CONTROL_MASK, "page.zoom-one", NULL);
+
   _editor_window_class_actions_init (klass);
 
   g_type_ensure (EDITOR_TYPE_OPEN_POPOVER);