[gtksourceview/gtksourceview-5-4] hover: dismiss hover when cursor moves

[Christian Hergert <chergert src gnome org>]

commit e9192e12482993937708072acae57a9bee97220d
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 27 17:59:54 2022 -0700

    hover: dismiss hover when cursor moves
    
    This will dismiss a pending hover if the user moves the cursor first.

 gtksourceview/gtksourcehover.c | 63 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)
---
diff --git a/gtksourceview/gtksourcehover.c b/gtksourceview/gtksourcehover.c
index 6ee59ba0..09fa09c9 100644
--- a/gtksourceview/gtksourcehover.c
+++ b/gtksourceview/gtksourcehover.c
@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include "gtksourceassistant-private.h"
+#include "gtksourcebuffer.h"
 #include "gtksourcehover-private.h"
 #include "gtksourcehoverassistant-private.h"
 #include "gtksourcehovercontext.h"
@@ -34,7 +35,7 @@
 
 /**
  * GtkSourceHover:
- * 
+ *
  * Interactive tooltips.
  *
  * `GtkSourceHover` allows a [class@View] to provide contextual information.
@@ -56,6 +57,7 @@ struct _GtkSourceHover
 
        GtkSourceView      *view;
        GtkSourceAssistant *assistant;
+       GtkTextBuffer      *buffer;
 
        GPtrArray          *providers;
 
@@ -76,6 +78,57 @@ enum {
 
 static GParamSpec *properties [N_PROPS];
 
+static void
+cursor_moved_cb (GtkSourceHover  *hover,
+                GtkSourceBuffer *buffer)
+{
+       g_assert (GTK_SOURCE_IS_HOVER (hover));
+       g_assert (GTK_SOURCE_IS_BUFFER (buffer));
+
+       g_clear_handle_id (&hover->settle_source, g_source_remove);
+       _gtk_source_hover_assistant_dismiss (GTK_SOURCE_HOVER_ASSISTANT (hover->assistant));
+}
+
+static void
+gtk_source_hover_notify_buffer (GtkSourceHover *hover,
+                                GParamSpec     *pspec,
+                                GtkSourceView  *view)
+{
+       GtkTextBuffer *buffer;
+
+       g_assert (GTK_SOURCE_IS_HOVER (hover));
+       g_assert (GTK_SOURCE_IS_VIEW (view));
+
+       buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
+
+       if (buffer == hover->buffer)
+       {
+               return;
+       }
+
+       if (hover->buffer != NULL)
+       {
+               g_signal_handlers_disconnect_by_func (hover->buffer,
+                                                     G_CALLBACK (cursor_moved_cb),
+                                                     hover);
+               g_clear_weak_pointer (&hover->buffer);
+       }
+
+       if (!GTK_SOURCE_IS_BUFFER (buffer))
+       {
+               return;
+       }
+
+       if (g_set_weak_pointer (&hover->buffer, buffer))
+       {
+               g_signal_connect_object (hover->buffer,
+                                        "cursor-moved",
+                                        G_CALLBACK (cursor_moved_cb),
+                                        hover,
+                                        G_CONNECT_SWAPPED);
+       }
+}
+
 static gboolean
 gtk_source_hover_get_bounds (GtkSourceHover *self,
                              GtkTextIter    *begin,
@@ -243,6 +296,7 @@ gtk_source_hover_dispose (GObject *object)
        g_clear_handle_id (&self->settle_source, g_source_remove);
        g_clear_pointer (&self->assistant, _gtk_source_assistant_destroy);
        g_clear_weak_pointer (&self->view);
+       g_clear_weak_pointer (&self->buffer);
 
        if (self->providers->len > 0)
        {
@@ -377,6 +431,13 @@ _gtk_source_hover_new (GtkSourceView *view)
                                 G_CONNECT_SWAPPED);
        gtk_widget_add_controller (GTK_WIDGET (view), scroll);
 
+       g_signal_connect_object (view,
+                                "notify::buffer",
+                                G_CALLBACK (gtk_source_hover_notify_buffer),
+                                self,
+                                G_CONNECT_SWAPPED);
+       gtk_source_hover_notify_buffer (self, NULL, view);
+
        return self;
 }