[gtksourceview/wip/chergert/vim] allow setting mark by alpha char

[Christian Hergert <chergert src gnome org>]

commit 3f0c86432dd423c2d2720f95cb7d24a89e626f87
Author: Christian Hergert <chergert redhat com>
Date:   Sun Nov 7 11:11:28 2021 -0800

    allow setting mark by alpha char

 gtksourceview/vim/gtk-source-vim-normal.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
---
diff --git a/gtksourceview/vim/gtk-source-vim-normal.c b/gtksourceview/vim/gtk-source-vim-normal.c
index 2172c40b..7455121a 100644
--- a/gtksourceview/vim/gtk-source-vim-normal.c
+++ b/gtksourceview/vim/gtk-source-vim-normal.c
@@ -1023,6 +1023,27 @@ key_handler_motion (GtkSourceVimNormal *self,
        return TRUE;
 }
 
+static gboolean
+key_handler_mark (GtkSourceVimNormal *self,
+                  guint               keyval,
+                  guint               keycode,
+                  GdkModifierType     mods,
+                  const char         *string)
+{
+       GtkTextIter iter;
+
+       if (!g_ascii_isalpha (string[0]))
+       {
+               return gtk_source_vim_normal_bail (self);
+       }
+
+       gtk_source_vim_state_get_buffer (GTK_SOURCE_VIM_STATE (self), &iter, NULL);
+       gtk_source_vim_state_set_mark (GTK_SOURCE_VIM_STATE (self), string, &iter);
+       gtk_source_vim_normal_clear (self);
+
+       return TRUE;
+}
+
 static gboolean
 key_handler_initial (GtkSourceVimNormal *self,
                      guint               keyval,
@@ -1116,6 +1137,10 @@ key_handler_initial (GtkSourceVimNormal *self,
                                self->handler = key_handler_motion;
                                break;
 
+                       case GDK_KEY_m:
+                               self->handler = key_handler_mark;
+                               return TRUE;
+
                        case GDK_KEY_1: case GDK_KEY_KP_1:
                        case GDK_KEY_2: case GDK_KEY_KP_2:
                        case GDK_KEY_3: case GDK_KEY_KP_3: