[gtksourceview/wip/chergert/vim] add format-text signal on im context

[Christian Hergert <chergert src gnome org>]

commit c524d5c6e88d746c272d948ddd9b6fcce25cbc2c
Author: Christian Hergert <chergert redhat com>
Date:   Wed Nov 3 17:38:37 2021 -0700

    add format-text signal on im context

 gtksourceview/gtksourcevimimcontext.c | 44 +++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
---
diff --git a/gtksourceview/gtksourcevimimcontext.c b/gtksourceview/gtksourcevimimcontext.c
index 7b846134..5b730a21 100644
--- a/gtksourceview/gtksourcevimimcontext.c
+++ b/gtksourceview/gtksourcevimimcontext.c
@@ -53,6 +53,7 @@ enum {
 
 enum {
        EXECUTE_COMMAND,
+       FORMAT_TEXT,
        OBSERVE_KEY,
        N_SIGNALS
 };
@@ -109,6 +110,20 @@ on_vim_ready_cb (GtkSourceVimIMContext *self,
        self->reset_observer = TRUE;
 }
 
+static void
+on_vim_format_cb (GtkSourceVimIMContext *self,
+                  GtkTextIter           *begin,
+                  GtkTextIter           *end,
+                  GtkSourceVim          *vim)
+{
+       g_assert (GTK_SOURCE_IS_VIM_IM_CONTEXT (self));
+       g_assert (begin != NULL);
+       g_assert (end != NULL);
+       g_assert (GTK_SOURCE_IS_VIM (vim));
+
+       g_signal_emit (self, signals [FORMAT_TEXT], 0, begin, end);
+}
+
 static void
 gtk_source_vim_im_context_set_client_widget (GtkIMContext *context,
                                              GtkWidget    *widget)
@@ -137,6 +152,12 @@ gtk_source_vim_im_context_set_client_widget (GtkIMContext *context,
                                 self,
                                 G_CONNECT_SWAPPED);
 
+       g_signal_connect_object (self->vim,
+                                "format",
+                                G_CALLBACK (on_vim_format_cb),
+                                self,
+                                G_CONNECT_SWAPPED);
+
        g_signal_connect_object (self->vim,
                                 "ready",
                                 G_CALLBACK (on_vim_ready_cb),
@@ -293,6 +314,29 @@ gtk_source_vim_im_context_class_init (GtkSourceVimIMContextClass *klass)
                              1,
                              G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);
 
+       /**
+        * GtkSourceVimIMContext::format-text:
+        * @self: a #GtkSourceVimIMContext
+        * @begin: the start location
+        * @end: the end location
+        *
+        * Requests that the application format the text between
+        * @begin and @end.
+        *
+        * Since: 5.4
+        */
+       signals[FORMAT_TEXT] =
+               g_signal_new ("format-text",
+                             G_TYPE_FROM_CLASS (klass),
+                             G_SIGNAL_RUN_LAST,
+                             0,
+                             NULL, NULL,
+                             NULL,
+                             G_TYPE_NONE,
+                             2,
+                             GTK_TYPE_TEXT_ITER,
+                             GTK_TYPE_TEXT_ITER);
+
        signals[OBSERVE_KEY] =
                g_signal_new ("observe-key",
                              G_TYPE_FROM_CLASS (klass),