[gtk/wip/exalm/searchbar] searchbar: Don't activate type-to-search when focusing entries

[Alexander Mikhaylenko <alexm src gnome org>]

commit 7a966ec60eb8411c252805240cfb2d0e905faab8
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Jan 20 17:13:59 2021 +0500

    searchbar: Don't activate type-to-search when focusing entries
    
    Currently using GtkSearchBar:key-capture-widget steals focus from unrelated
    entries within the key capture widget, which is a common case when the key
    capture widget is the window containing the search bar.
    
    In theory it can be fixed by switching the propagation phase to bubble, but
    there's a good chance that keypresses will then be intercepted by some
    other widget when not wanted.
    
    So, instead do a hack and check the type of the focused widget, skipping
    if it's a GtkEditable or GtkTextView, and additionally has the `editable`
    property set to TRUE.
    
    Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/3606

 gtk/gtksearchbar.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/gtk/gtksearchbar.c b/gtk/gtksearchbar.c
index c1a23bf304..026bd769be 100644
--- a/gtk/gtksearchbar.c
+++ b/gtk/gtksearchbar.c
@@ -40,6 +40,7 @@
 #include "gtkrevealer.h"
 #include "gtksearchentryprivate.h"
 #include "gtksnapshot.h"
+#include "gtktextview.h"
 #include "gtkwidgetprivate.h"
 
 /**
@@ -520,6 +521,7 @@ capture_widget_key_handled (GtkEventControllerKey *controller,
                             GtkSearchBar          *bar)
 {
   gboolean handled;
+  GtkWidget *focus;
 
   if (!gtk_widget_get_mapped (GTK_WIDGET (bar)))
     return GDK_EVENT_PROPAGATE;
@@ -527,6 +529,19 @@ capture_widget_key_handled (GtkEventControllerKey *controller,
   if (bar->reveal_child)
     return GDK_EVENT_PROPAGATE;
 
+  focus = gtk_root_get_focus (gtk_widget_get_root (GTK_WIDGET (bar->capture_widget)));
+
+  /* Make sure type-to-search does not interfere with entries or text views */
+  if (GTK_IS_EDITABLE (focus) || GTK_IS_TEXT_VIEW (focus)) {
+    gboolean editable;
+
+    /* Take a shortcut as both GtkEditable and GtkTextView have this property */
+    g_object_get (focus, "editable", &editable, NULL);
+
+    if (editable)
+      return GDK_EVENT_PROPAGATE;
+  }
+
   if (bar->entry == NULL)
     {
       g_warning ("The search bar does not have an entry connected to it. Call gtk_search_bar_connect_entry() 
to connect one.");