[gtksourceview] buffer: add internal API to block cursor-moved signal emission

[Christian Hergert <chergert src gnome org>]

commit 542789cc5fcb5ccfe9a54e1eb8c181904d0565b0
Author: Christian Hergert <chergert redhat com>
Date:   Mon Aug 1 13:23:26 2022 -0700

    buffer: add internal API to block cursor-moved signal emission
    
    This can be useful in coordinating objects so that we can disable
    extraneous emission during buffer intensive operations.

 gtksourceview/gtksourcebuffer-private.h |  4 ++++
 gtksourceview/gtksourcebuffer.c         | 35 +++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
---
diff --git a/gtksourceview/gtksourcebuffer-private.h b/gtksourceview/gtksourcebuffer-private.h
index 96558894..644f4721 100644
--- a/gtksourceview/gtksourcebuffer-private.h
+++ b/gtksourceview/gtksourcebuffer-private.h
@@ -75,5 +75,9 @@ GTK_SOURCE_INTERNAL
 GtkTextTag               *_gtk_source_buffer_get_snippet_focus_tag       (GtkSourceBuffer        *buffer);
 GTK_SOURCE_INTERNAL
 gint64                    _gtk_source_buffer_get_insertion_count         (GtkSourceBuffer        *buffer);
+GTK_SOURCE_INTERNAL
+void                      _gtk_source_buffer_block_cursor_moved          (GtkSourceBuffer        *buffer);
+GTK_SOURCE_INTERNAL
+void                      _gtk_source_buffer_unblock_cursor_moved        (GtkSourceBuffer        *buffer);
 
 G_END_DECLS
diff --git a/gtksourceview/gtksourcebuffer.c b/gtksourceview/gtksourcebuffer.c
index de4fba49..cbb1ed76 100644
--- a/gtksourceview/gtksourcebuffer.c
+++ b/gtksourceview/gtksourcebuffer.c
@@ -163,6 +163,8 @@ typedef struct
 
        gint64 insertion_count;
 
+       guint cursor_moved_block_count;
+
        guint has_draw_spaces_tag : 1;
        guint highlight_syntax : 1;
        guint highlight_brackets : 1;
@@ -1030,6 +1032,13 @@ queue_bracket_highlighting_update (GtkSourceBuffer *buffer)
 static void
 cursor_moved (GtkSourceBuffer *buffer)
 {
+       GtkSourceBufferPrivate *priv = gtk_source_buffer_get_instance_private (buffer);
+
+       if (priv->cursor_moved_block_count > 0)
+       {
+               return;
+       }
+
        queue_bracket_highlighting_update (buffer);
 
        GTK_SOURCE_PROFILER_BEGIN_MARK;
@@ -3071,3 +3080,29 @@ _gtk_source_buffer_get_insertion_count (GtkSourceBuffer *buffer)
 
        return priv->insertion_count;
 }
+
+void
+_gtk_source_buffer_block_cursor_moved (GtkSourceBuffer *buffer)
+{
+       GtkSourceBufferPrivate *priv = gtk_source_buffer_get_instance_private (buffer);
+
+       g_return_if_fail (GTK_SOURCE_IS_BUFFER (buffer));
+
+       priv->cursor_moved_block_count++;
+}
+
+void
+_gtk_source_buffer_unblock_cursor_moved (GtkSourceBuffer *buffer)
+{
+       GtkSourceBufferPrivate *priv = gtk_source_buffer_get_instance_private (buffer);
+
+       g_return_if_fail (GTK_SOURCE_IS_BUFFER (buffer));
+       g_return_if_fail (priv->cursor_moved_block_count > 0);
+
+       priv->cursor_moved_block_count--;
+
+       if (priv->cursor_moved_block_count == 0)
+       {
+               cursor_moved (buffer);
+       }
+}