[vte] widget: Add stubs for IM surrounding text callbacks

[Christian Persch <chpe src gnome org>]

commit 242f9db8903505524193f09ae6dedfc2e077a7f0
Author: Christian Persch <chpe gnome org>
Date:   Sun Dec 6 19:49:37 2015 +0100

    widget: Add stubs for IM surrounding text callbacks
    
    https://bugzilla.gnome.org/show_bug.cgi?id=726191

 src/vte.cc         |   42 ++++++++++++++++++++++++++++++++++++++++--
 src/vteinternal.hh |    3 +++
 2 files changed, 43 insertions(+), 2 deletions(-)
---
diff --git a/src/vte.cc b/src/vte.cc
index 69c4273..7b901d2 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -4626,6 +4626,42 @@ VteTerminalPrivate::im_preedit_changed()
        invalidate_cursor_once();
 }
 
+static gboolean
+vte_terminal_im_retrieve_surrounding_cb(GtkIMContext *im_context,
+                                        VteTerminalPrivate *that)
+{
+        return that->im_retrieve_surrounding();
+}
+
+bool
+VteTerminalPrivate::im_retrieve_surrounding()
+{
+        /* FIXME: implement this! Bug #726191 */
+        _vte_debug_print(VTE_DEBUG_EVENTS,
+                         "Input method retrieve-surrounding.\n");
+        return false;
+}
+
+static gboolean
+vte_terminal_im_delete_surrounding_cb(GtkIMContext *im_context,
+                                      int offset,
+                                      int n_chars,
+                                      VteTerminalPrivate *that)
+{
+        return that->im_delete_surrounding(offset, n_chars);
+}
+
+bool
+VteTerminalPrivate::im_delete_surrounding(int offset,
+                                          int n_chars)
+{
+        /* FIXME: implement this! Bug #726191 */
+        _vte_debug_print(VTE_DEBUG_EVENTS,
+                         "Input method delete-surrounding offset %d n-chars %d.\n",
+                         offset, n_chars);
+        return false;
+}
+
 void
 VteTerminalPrivate::widget_style_updated()
 {
@@ -8658,8 +8694,6 @@ VteTerminalPrivate::widget_realize()
                 m_draw = _vte_draw_new();
         }
 
-       /* Set up input method support.  FIXME: do we need to handle the
-        * "retrieve-surrounding" and "delete-surrounding" events? */
         // FIXMEchpe this shouldn't ever be true:
        if (m_im_context != nullptr) {
                g_signal_handlers_disconnect_matched(m_im_context, G_SIGNAL_MATCH_DATA,
@@ -8681,6 +8715,10 @@ VteTerminalPrivate::widget_realize()
                         G_CALLBACK(vte_terminal_im_preedit_changed_cb), this);
        g_signal_connect(m_im_context, "preedit-end",
                         G_CALLBACK(vte_terminal_im_preedit_end_cb), this);
+       g_signal_connect(m_im_context, "retrieve-surrounding",
+                        G_CALLBACK(vte_terminal_im_retrieve_surrounding_cb), this);
+       g_signal_connect(m_im_context, "delete-surrounding",
+                        G_CALLBACK(vte_terminal_im_delete_surrounding_cb), this);
        gtk_im_context_set_use_preedit(m_im_context, TRUE);
 
        /* Clear modifiers. */
diff --git a/src/vteinternal.hh b/src/vteinternal.hh
index 8e38e48..344e38d 100644
--- a/src/vteinternal.hh
+++ b/src/vteinternal.hh
@@ -563,6 +563,9 @@ public:
         void im_preedit_start();
         void im_preedit_end();
         void im_preedit_changed();
+        bool im_retrieve_surrounding();
+        bool im_delete_surrounding(int offset,
+                                   int n_chars);
         void im_reset();
 
         bool spawn_sync(VtePtyFlags pty_flags,