callbacks to set markers in editor using command line dbstop function * debug.h, debug.cc (location_info): New function. * input.cc (get_debug_input): Use it to pass location info to hook functions. * debug.cc (bp_table::do_add_breakpoint): Likewise. (bp_table::do_remove_all_breakpoints_in_file): Likewise. (bp_table::do_remove_breakpoint): Likewise. (Fadd_dbstop_hook, Fremove_dbstop_hook, Fadd_dbclear_hook, Fremove_dbclear_hook): New functions. (dbstop_hook_functions, dbclear_hook_functions): New static variables. * file-editor-interface.h (file_editor_interface::handle_update_dbstop_marker_request): New pure virtual function. (file_editor_interface::request_open_file): New args, dbstop_marker and insert. * file-editor.h, file-editor.cc (file_editor::request_open_file): Likewise. Emit signal to set or remove dbstop marker. (file_editor::handle_update_dbstop_marker_request): New function. (file_editor::fetab_do_dbstop_marker): New signal. (file_editor::add_file_editor_tab): Connect fetab_do_dbstop_marker signal to do_dbstop_marker. * file-editor-tab.h, file-editor-tab.cc (file_editor_tab::do_dbstop_marker): New function. * file-editor-tab.cc (file_editor::goto_line): Eliminate shadowing variable declaration. * main-window.h, main-window.cc (main_window::handle_update_dbstop_marker_request): New function. (main_window::construct): Connect update_dbstop_marker_signal signal to handle_update_dbstop_marker_request. * octave-event-listener.h (event_listener::update_dbstop_marker): New pure virtual function. * octave-link.h, octave-link.cc (octave_link::update_breakpoint_hook_fcn, octave_link::do_update_breakpoint_hook_fcn): New functions. (octave_link::do_update_debug_pointer): Improve error messages. * octave-main-thread.cc (dbstop_hook_fcn, dbclear_hook_fcn): New functions. (octave_main_thread::octave_main_thread): Install hook functions for for dbstop and dbclear hooks. * octave-qt-event-listener.h, octave-qt-event-listener.cc (octave_qt_event_listener::update_dbstop_marker): New fucntion. (octave_qt_event_listener::update_dbstop_marker_signal): New signal.

--- a/libgui/src/m-editor/file-editor.h	Thu Mar 28 02:52:18 2013 -0400
+++ b/libgui/src/m-editor/file-editor.h	Thu Mar 28 03:20:25 2013 -0400
@@ -89,6 +89,7 @@
   void fetab_find (const QWidget* ID);
   void fetab_goto_line (const QWidget* ID, int line = -1);
   void fetab_set_debugger_position (const QWidget* ID, int line = -1);
+  void fetab_do_dbstop_marker (bool insert, const QWidget* ID, int line = -1);
   void fetab_set_focus (const QWidget* ID);
 
 public slots:
@@ -130,12 +131,16 @@
   void check_conflict_save (const QString& fileName, bool remove_on_success);
 
   void handle_update_debug_pointer_request (const QString& file, int line);
+  void handle_update_dbstop_marker_request (bool insert, const QString& file,
+                                            int line);
 
   /** Tells the editor to react on changed settings. */
   void notice_settings ();
 
 private slots:
-  void request_open_file (const QString& fileName, int line = -1, bool = false);
+  void request_open_file (const QString& fileName, int line = -1,
+                          bool debug_pointer = false,
+                          bool dbstop_marker = false, bool insert = true);
 
 private:
   void construct ();