[gnome-builder] vim: add support for toggle case (~)

[Christian Hergert <chergert src gnome org>]

commit 9235b3a71ecafc2f373fce85ce9ab5c16ebd1da9
Author: Christian Hergert <christian hergert me>
Date:   Wed Oct 8 19:56:39 2014 -0700

    vim: add support for toggle case (~)
    
    You can use this individually on the current character or on selections.
    It will try to leave the cursor after the operation in the same place that
    VIM does which is under the insert cursor in the case of a selection or
    after the cursor in the case of no selection.

 src/editor/gb-editor-vim.c |   96 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 96 insertions(+), 0 deletions(-)
---
diff --git a/src/editor/gb-editor-vim.c b/src/editor/gb-editor-vim.c
index 67ef188..061bfd9 100644
--- a/src/editor/gb-editor-vim.c
+++ b/src/editor/gb-editor-vim.c
@@ -1455,6 +1455,77 @@ move_mark:
 }
 
 static void
+gb_editor_vim_toggle_case (GbEditorVim *vim)
+{
+  GtkTextBuffer *buffer;
+  GtkTextIter cur;
+  GtkTextIter begin;
+  GtkTextIter end;
+  gboolean has_selection;
+  gboolean place_at_end = FALSE;
+  GString *str;
+
+  g_assert (GB_IS_EDITOR_VIM (vim));
+
+  buffer = gtk_text_view_get_buffer (vim->priv->text_view);
+  has_selection = gb_editor_vim_get_selection_bounds (vim, &begin, &end);
+
+  if (gtk_text_iter_compare (&begin, &end) > 0)
+    {
+      text_iter_swap (&begin, &end);
+      place_at_end = TRUE;
+    }
+
+  if (!has_selection)
+    {
+      if (!gtk_text_iter_forward_char (&end))
+        return;
+    }
+
+  str = g_string_new (NULL);
+
+  gtk_text_iter_assign (&cur, &begin);
+
+  while (gtk_text_iter_compare (&cur, &end) < 0)
+    {
+      gunichar ch;
+
+      ch = gtk_text_iter_get_char (&cur);
+
+      if (g_unichar_isupper (ch))
+        g_string_append_unichar (str, g_unichar_tolower (ch));
+      else
+        g_string_append_unichar (str, g_unichar_toupper (ch));
+
+      if (!gtk_text_iter_forward_char (&cur))
+        break;
+    }
+
+  if (!str->len)
+    goto cleanup;
+
+  gtk_text_buffer_begin_user_action (buffer);
+
+  gb_editor_vim_save_position (vim);
+  gtk_text_buffer_delete (buffer, &begin, &end);
+  gtk_text_buffer_insert (buffer, &begin, str->str, str->len);
+  gb_editor_vim_restore_position (vim);
+
+  if (!has_selection)
+    gb_editor_vim_select_range (vim, &begin, &begin);
+  else if (place_at_end)
+    {
+      if (gtk_text_iter_backward_char (&begin))
+        gb_editor_vim_select_range (vim, &begin, &begin);
+    }
+
+  gtk_text_buffer_end_user_action (buffer);
+
+cleanup:
+  g_string_free (str, TRUE);
+}
+
+static void
 gb_editor_vim_delete_selection (GbEditorVim *vim)
 {
   GtkTextBuffer *buffer;
@@ -4068,6 +4139,27 @@ gb_editor_vim_cmd_matching_bracket (GbEditorVim *vim,
 }
 
 static void
+gb_editor_vim_cmd_toggle_case (GbEditorVim *vim,
+                               guint        count,
+                               gchar        modifier)
+{
+  GtkTextBuffer *buffer;
+  guint i;
+
+  g_assert (GB_IS_EDITOR_VIM (vim));
+
+  buffer = gtk_text_view_get_buffer (vim->priv->text_view);
+
+  if (gtk_text_buffer_get_has_selection (buffer))
+    count = 1;
+  else
+    count = MAX (1, count);
+
+  for (i = 0; i < count; i++)
+    gb_editor_vim_toggle_case (vim);
+}
+
+static void
 gb_editor_vim_class_register_command (GbEditorVimClass       *klass,
                                       gchar                   key,
                                       GbEditorVimCommandFlags flags,
@@ -4244,6 +4336,10 @@ gb_editor_vim_class_init (GbEditorVimClass *klass)
                                         GB_EDITOR_VIM_COMMAND_FLAG_NONE,
                                         GB_EDITOR_VIM_COMMAND_JUMP,
                                         gb_editor_vim_cmd_matching_bracket);
+  gb_editor_vim_class_register_command (klass, '~',
+                                        GB_EDITOR_VIM_COMMAND_FLAG_NONE,
+                                        GB_EDITOR_VIM_COMMAND_CHANGE,
+                                        gb_editor_vim_cmd_toggle_case);
   gb_editor_vim_class_register_command (klass, 'A',
                                         GB_EDITOR_VIM_COMMAND_FLAG_NONE,
                                         GB_EDITOR_VIM_COMMAND_CHANGE,