# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1346859681 14400
# Node ID fd27e10b9b055c96ecdaedf15a248139cb698a93
# Parent  8bd5c490b787ba5df78a06ab2ca5281aeae4eaaa
pass QString by const reference instead of value

* files-dockwidget.cc, files-dockwidget.h, history-dockwidget.h,
file-editor-interface.h, file-editor-tab.cc, file-editor-tab.h,
file-editor.cc, file-editor.h, main-window.cc, main-window.h,
octave-qt-event-listener.h, parser.cc, parser.h, webinfo.cc,
webinfo.h, resource-manager.cc, resource-manager.h: For all functions
that take QString arguments, use "const Qstring&" instead of passing
QString by value.

diff --git a/libgui/src/files-dockwidget.cc b/libgui/src/files-dockwidget.cc
--- a/libgui/src/files-dockwidget.cc
+++ b/libgui/src/files-dockwidget.cc
@@ -119,7 +119,7 @@
 }
 
 void
-files_dock_widget::set_current_directory (QString currentDirectory)
+files_dock_widget::set_current_directory (const QString& currentDirectory)
 {
   display_directory (currentDirectory);
 }
@@ -139,7 +139,7 @@
 }
 
 void
-files_dock_widget::display_directory (QString directory)
+files_dock_widget::display_directory (const QString& directory)
 {
   QFileInfo fileInfo (directory);
   if (fileInfo.exists ())
diff --git a/libgui/src/files-dockwidget.h b/libgui/src/files-dockwidget.h
--- a/libgui/src/files-dockwidget.h
+++ b/libgui/src/files-dockwidget.h
@@ -57,12 +57,12 @@
   void do_up_directory ();
 
   /** Sets the current directory being displayed. */
-  void set_current_directory (QString currentDirectory);
+  void set_current_directory (const QString& currentDirectory);
 
   /** Accepts user input a the line edit for the current directory. */
   void handle_directory_entered ();
 
-  void display_directory (QString directory);
+  void display_directory (const QString& directory);
 
   /** Tells the widget to react on changed settings. */
   void notice_settings ();
@@ -72,10 +72,10 @@
 
 signals:
   /** Emitted, whenever the user requested to open a file. */
-  void open_file (QString fileName);
+  void open_file (const QString& fileName);
 
   /** Emitted, whenever the currently displayed directory changed. */
-  void displayed_directory_changed (QString directory);
+  void displayed_directory_changed (const QString& directory);
 
   /** Custom signal that tells if a user has clicke away that dock widget. */
   void active_changed (bool active);
diff --git a/libgui/src/history-dockwidget.h b/libgui/src/history-dockwidget.h
--- a/libgui/src/history-dockwidget.h
+++ b/libgui/src/history-dockwidget.h
@@ -48,10 +48,10 @@
   void reset_model ();
 
 signals:
-  void information (QString message);
+  void information (const QString& message);
 
   /** Emitted, whenever the user double-clicked a command in the history. */
-  void command_double_clicked (QString command);
+  void command_double_clicked (const QString& command);
 
   /** Custom signal that tells if a user has clicked away that dock widget. */
   void active_changed (bool active);
diff --git a/libgui/src/m-editor/file-editor-interface.h b/libgui/src/m-editor/file-editor-interface.h
--- a/libgui/src/m-editor/file-editor-interface.h
+++ b/libgui/src/m-editor/file-editor-interface.h
@@ -57,7 +57,7 @@
   public slots:
     virtual void request_new_file () = 0;
     virtual void request_open_file () = 0;
-    virtual void request_open_file (QString fileName) = 0;
+    virtual void request_open_file (const QString& fileName) = 0;
 
   signals:
       void active_changed (bool active);
diff --git a/libgui/src/m-editor/file-editor-tab.cc b/libgui/src/m-editor/file-editor-tab.cc
--- a/libgui/src/m-editor/file-editor-tab.cc
+++ b/libgui/src/m-editor/file-editor-tab.cc
@@ -198,7 +198,7 @@
 }
 
 void
-file_editor_tab::set_file_name (QString fileName)
+file_editor_tab::set_file_name (const QString& fileName)
 {
   _file_name = fileName;
   update_lexer ();
@@ -436,7 +436,7 @@
 }
 
 int
-file_editor_tab::check_file_modified (QString msg, int cancelButton)
+file_editor_tab::check_file_modified (const QString& msg, int cancelButton)
 {
   int decision = QMessageBox::Yes;
   if (_edit_area->isModified ())
@@ -626,7 +626,7 @@
 }
 
 void
-file_editor_tab::load_file (QString fileName)
+file_editor_tab::load_file (const QString& fileName)
 {
   if (!_file_editor->isVisible ())
     {
@@ -675,7 +675,7 @@
 }
 
 bool
-file_editor_tab::save_file (QString saveFileName)
+file_editor_tab::save_file (const QString& saveFileName)
 {
   // it is a new file with the name "<unnamed>" -> call saveFielAs
   if (saveFileName == UNNAMED_FILE || saveFileName.isEmpty ())
@@ -777,7 +777,7 @@
 }
 
 void
-file_editor_tab::file_has_changed (QString fileName)
+file_editor_tab::file_has_changed (const QString& fileName)
 {
   Q_UNUSED (fileName);
   if (QFile::exists (_file_name))
diff --git a/libgui/src/m-editor/file-editor-tab.h b/libgui/src/m-editor/file-editor-tab.h
--- a/libgui/src/m-editor/file-editor-tab.h
+++ b/libgui/src/m-editor/file-editor-tab.h
@@ -65,23 +65,23 @@
   void set_modified (bool modified = true);
 
   bool open_file ();
-  void load_file (QString fileName);
+  void load_file (const QString& fileName);
   void new_file ();
   bool save_file ();
-  bool save_file(QString saveFileName);
+  bool save_file (const QString& saveFileName);
   bool save_file_as();
   void run_file ();
 
-  void file_has_changed (QString fileName);
+  void file_has_changed (const QString& fileName);
 
 signals:
-  void file_name_changed (QString fileName);
+  void file_name_changed (const QString& fileName);
   void editor_state_changed ();
   void close_request ();
 
 protected:
   void closeEvent (QCloseEvent *event);
-  void set_file_name (QString fileName);
+  void set_file_name (const QString& fileName);
 
 private:
   void update_lexer ();
@@ -89,7 +89,7 @@
   void request_remove_breakpoint (int line);
 
   void update_tracked_file ();
-  int check_file_modified (QString msg, int cancelButton);
+  int check_file_modified (const QString& msg, int cancelButton);
   void do_comment_selected_text (bool comment);
 
   file_editor *         _file_editor;
diff --git a/libgui/src/m-editor/file-editor.cc b/libgui/src/m-editor/file-editor.cc
--- a/libgui/src/m-editor/file-editor.cc
+++ b/libgui/src/m-editor/file-editor.cc
@@ -111,7 +111,7 @@
 }
 
 void
-file_editor::request_open_file (QString fileName)
+file_editor::request_open_file (const QString& fileName)
 {
   if (!isVisible ())
     {
@@ -279,7 +279,7 @@
 }
 
 void
-file_editor::handle_file_name_changed (QString fileName)
+file_editor::handle_file_name_changed (const QString& fileName)
 {
   QObject *senderObject = sender ();
   file_editor_tab *fileEditorTab
diff --git a/libgui/src/m-editor/file-editor.h b/libgui/src/m-editor/file-editor.h
--- a/libgui/src/m-editor/file-editor.h
+++ b/libgui/src/m-editor/file-editor.h
@@ -50,7 +50,7 @@
 public:
   file_editor (QTerminal *terminal, main_window *m);
   ~file_editor ();
-  void loadFile (QString fileName);
+  void loadFile (const QString& fileName);
 
   QTerminal *       terminal ();
   main_window *     get_main_window ();
@@ -64,7 +64,7 @@
 public slots:
   void request_new_file ();
   void request_open_file ();
-  void request_open_file (QString fileName);
+  void request_open_file (const QString& fileName);
 
   void request_undo ();
   void request_redo ();
@@ -88,7 +88,7 @@
   void request_uncomment_selected_text ();
   void request_find ();
 
-  void handle_file_name_changed (QString fileName);
+  void handle_file_name_changed (const QString& fileName);
   void handle_tab_close_request (int index);
   void handle_tab_close_request ();
   void active_tab_changed (int index);
diff --git a/libgui/src/main-window.cc b/libgui/src/main-window.cc
--- a/libgui/src/main-window.cc
+++ b/libgui/src/main-window.cc
@@ -85,14 +85,14 @@
 }
 
 void
-main_window::open_file (QString file_name)
+main_window::open_file (const QString& file_name)
 {
   _file_editor->request_open_file (file_name);
   focus_editor ();
 }
 
 void
-main_window::report_status_message (QString statusMessage)
+main_window::report_status_message (const QString& statusMessage)
 {
   _status_bar->showMessage (statusMessage, 1000);
 }
@@ -140,7 +140,7 @@
 }
 
 void
-main_window::handle_command_double_clicked (QString command)
+main_window::handle_command_double_clicked (const QString& command)
 {
   _terminal->sendText (command);
   _terminal->setFocus ();
@@ -216,7 +216,7 @@
 }
 
 void
-main_window::current_working_directory_has_changed (QString directory)
+main_window::current_working_directory_has_changed (const QString& directory)
 {
   if (_current_directory_combo_box->count () > 31)
     {
@@ -244,7 +244,7 @@
 }
 
 void
-main_window::set_current_working_directory (QString directory)
+main_window::set_current_working_directory (const QString& directory)
 {
   octave_link::instance ()
       ->post_event (new octave_change_directory_event (*this,
diff --git a/libgui/src/main-window.h b/libgui/src/main-window.h
--- a/libgui/src/main-window.h
+++ b/libgui/src/main-window.h
@@ -83,15 +83,15 @@
   void settings_changed ();
 
 public slots:
-  void report_status_message (QString statusMessage);
+  void report_status_message (const QString& statusMessage);
   void handle_save_workspace_request ();
   void handle_load_workspace_request ();
   void handle_clear_workspace_request ();
   void handle_clear_history_request ();
-  void handle_command_double_clicked (QString command);
+  void handle_command_double_clicked (const QString& command);
   void new_file ();
   void open_file ();
-  void open_file (QString file_name);
+  void open_file (const QString& file_name);
   void open_bug_tracker_page ();
   void open_agora_page ();
   void open_octave_forge_page ();
@@ -100,9 +100,9 @@
   void notice_settings ();
   void prepare_for_quit ();
   void reset_windows ();
-  void current_working_directory_has_changed (QString directory);
+  void current_working_directory_has_changed (const QString& directory);
   void change_current_working_directory ();
-  void set_current_working_directory (QString directory);
+  void set_current_working_directory (const QString& directory);
   void current_working_directory_up ();
 
   void focus_command_window ();
diff --git a/libgui/src/octave-qt-event-listener.h b/libgui/src/octave-qt-event-listener.h
--- a/libgui/src/octave-qt-event-listener.h
+++ b/libgui/src/octave-qt-event-listener.h
@@ -41,7 +41,7 @@
     void quit_debug_mode ();
 
   signals:
-    void current_directory_has_changed_signal (QString directory);
+    void current_directory_has_changed_signal (const QString& directory);
     void entered_debug_mode_signal ();
     void quit_debug_mode_signal ();
 };
diff --git a/libgui/src/qtinfo/parser.cc b/libgui/src/qtinfo/parser.cc
--- a/libgui/src/qtinfo/parser.cc
+++ b/libgui/src/qtinfo/parser.cc
@@ -41,7 +41,7 @@
 }
 
 void
-parser::set_info_path (QString infoPath)
+parser::set_info_path (const QString& infoPath)
 {
   this->_info_path = infoPath;
 
@@ -100,7 +100,7 @@
 }
 
 int
-parser::is_ref (QString node)
+parser::is_ref (const QString& node)
 {
   if (_ref_map.contains (node))
     {
@@ -112,8 +112,10 @@
 }
 
 QString
-parser::search_node (QString node)
+parser::search_node (const QString& node_arg)
 {
+  QString node = node_arg;
+
   QFileInfo file_info;
   QString ref;
 
@@ -152,7 +154,7 @@
 }
 
 QString
-parser::search_node (QString node, QIODevice *io)
+parser::search_node (const QString& node, QIODevice *io)
 {
   while (!io->atEnd ())
     {
@@ -186,7 +188,7 @@
 }
 
 static QString
-get_first_line (QString text)
+get_first_line (const QString& text)
 {
   int n = text.indexOf ("\n");
 
@@ -200,7 +202,7 @@
 }
 
 static QString
-parser_node (QString text, QString node_name)
+parser_node (const QString& text, const QString& node_name)
 {
   QString firstLine = get_first_line (text);
   QStringList nodes = firstLine.split (",");
@@ -217,31 +219,31 @@
 }
 
 QString
-parser::get_node_name (QString text)
+parser::get_node_name (const QString& text)
 {
   return parser_node (text, "Node:");
 }
 
 QString
-parser::get_node_up (QString text)
+parser::get_node_up (const QString& text)
 {
   return parser_node (text, "Up:");
 }
 
 QString
-parser::get_node_next (QString text)
+parser::get_node_next (const QString& text)
 {
   return parser_node (text, "Next:");
 }
 
 QString
-parser::get_node_prev (QString text)
+parser::get_node_prev (const QString& text)
 {
   return parser_node (text, "Prev:");
 }
 
 static void
-replace_links (QString &text)
+replace_links (QString& text)
 {
   QRegExp re ("(\\*[N|n]ote|\n\\*)([ |\n]+)([^:]+):([^:\\.,]*)([:,\\.])");
   int i = 0, f;
@@ -282,7 +284,7 @@
 }
 
 static void
-replace_colons (QString &text)
+replace_colons (QString& text)
 {
   QRegExp re ("`([^']+)'");
   int i = 0, f;
@@ -298,7 +300,7 @@
 }
 
 static void
-info_to_html (QString &text)
+info_to_html (QString& text)
 {
   text.replace ("&", "&amp;");
   text.replace ("<", "&lt;");
@@ -311,8 +313,11 @@
 }
 
 QString
-parser::node_text_to_html (QString text, int anchorPos, QString anchor)
+parser::node_text_to_html (const QString& text_arg, int anchorPos,
+                           const QString& anchor)
 {
+  QString text = text_arg;
+
   QString nodeName = get_node_name (text);
   QString nodeUp   = get_node_up (text);
   QString nodeNext = get_node_next (text);
@@ -479,7 +484,7 @@
 }
 
 static void
-replace (QString &text, QRegExp re, QString after)
+replace (QString& text, const QRegExp& re, const QString& after)
 {
   int pos = 0;
 
@@ -495,7 +500,7 @@
 }
 
 QString
-parser::global_search (QString text, int max_founds)
+parser::global_search (const QString& text, int max_founds)
 {
   QString results;
   QStringList words = text.split (" ",QString::SkipEmptyParts);
diff --git a/libgui/src/qtinfo/parser.h b/libgui/src/qtinfo/parser.h
--- a/libgui/src/qtinfo/parser.h
+++ b/libgui/src/qtinfo/parser.h
@@ -45,20 +45,21 @@
 
 public:
   parser (QObject *parent = 0);
-  void set_info_path (QString _info_path);
+  void set_info_path (const QString& _info_path);
   QString get_info_path ();
-  QString search_node (QString node);
-  QString global_search (QString text, int maxFounds);
+  QString search_node (const QString& node);
+  QString global_search (const QString& text, int maxFounds);
 
   /** Checks if this node is reference. If node is reference, it will be returned its position
     * in text, else  it will be returned -1.
     */
-  int is_ref (QString node);
+  int is_ref (const QString& node);
 
   /**Translates text of node to Html. If anchorPos is not -1, then anchor is inserted in that
     * position.
     */
-  QString node_text_to_html (QString text, int anchorPos=-1, QString anchor=QString());
+  QString node_text_to_html (const QString& text, int anchorPos = -1,
+                             const QString& anchor = QString ());
 
 private:
   struct node_position
@@ -78,12 +79,12 @@
     int real_size;
   };
 
-  QString search_node (QString node, QIODevice * io);
+  QString search_node (const QString& node, QIODevice * io);
   QString get_next_node (QIODevice * io);
-  QString get_node_name (QString text);
-  QString get_node_up (QString text);
-  QString get_node_next (QString text);
-  QString get_node_prev (QString text);
+  QString get_node_name (const QString& text);
+  QString get_node_up (const QString& text);
+  QString get_node_next (const QString& text);
+  QString get_node_prev (const QString& text);
 
   /** Parses info files and gets map of node positions.*/
   void parse_info_map();
diff --git a/libgui/src/qtinfo/webinfo.cc b/libgui/src/qtinfo/webinfo.cc
--- a/libgui/src/qtinfo/webinfo.cc
+++ b/libgui/src/qtinfo/webinfo.cc
@@ -31,7 +31,7 @@
 
 
 webinfo::webinfo (QWidget *parent)
-  :QWidget (parent)
+  : QWidget (parent)
 {
   _font_web = font ();
 
@@ -90,14 +90,14 @@
 }
 
 void
-webinfo::set_info_path (QString info_path)
+webinfo::set_info_path (const QString& info_path)
 {
   _parser.set_info_path (info_path);
   load_node ("Top");
 }
 
 void
-webinfo::load_node (QString node_name)
+webinfo::load_node (const QString& node_name)
 {
   //Check if node has been already opened.
   for (int i = 0;i < _tab_bar->count (); i++)
@@ -142,7 +142,7 @@
 }
 
 QTextBrowser *
-webinfo::addNewTab(QString name)
+webinfo::addNewTab (const QString& name)
 {
   _text_browser = new QTextBrowser (this);
   _text_browser->setOpenLinks (false);
diff --git a/libgui/src/qtinfo/webinfo.h b/libgui/src/qtinfo/webinfo.h
--- a/libgui/src/qtinfo/webinfo.h
+++ b/libgui/src/qtinfo/webinfo.h
@@ -31,11 +31,11 @@
   Q_OBJECT
 public:
   webinfo (QWidget *parent = 0);
-  void set_info_path (QString info_path);
-  void load_node (QString node_name);
+  void set_info_path (const QString& info_path);
+  void load_node (const QString& node_name);
 
 public slots:
-  void link_clicked (const QUrl &link);
+  void link_clicked (const QUrl& link);
   void current_tab_changed (int index);
   void close_tab ();
   void search ();
@@ -55,6 +55,6 @@
   parser              _parser;
   QFont               _font_web;
 
-  QTextBrowser *addNewTab (QString name);
+  QTextBrowser *addNewTab (const QString& name);
   void closeTab(int index);
 };
diff --git a/libgui/src/resource-manager.cc b/libgui/src/resource-manager.cc
--- a/libgui/src/resource-manager.cc
+++ b/libgui/src/resource-manager.cc
@@ -53,7 +53,7 @@
 }
 
 QString
-resource_manager::find_translator_file (QString language)
+resource_manager::find_translator_file (const QString& language)
 {
   // TODO: Quick hack to be able to test language files.
   return QString ("../languages/%1.qm").arg (language);
@@ -127,7 +127,7 @@
 }
 
 void
-resource_manager::do_set_settings (QString file)
+resource_manager::do_set_settings (const QString& file)
 {
   delete settings;
   settings = new QSettings (file, QSettings::IniFormat);
diff --git a/libgui/src/resource-manager.h b/libgui/src/resource-manager.h
--- a/libgui/src/resource-manager.h
+++ b/libgui/src/resource-manager.h
@@ -54,13 +54,13 @@
       instance->do_reload_settings ();
   }
 
-  static void set_settings (QString file)
+  static void set_settings (const QString& file)
   {
     if (instance_ok ())
       instance->do_set_settings (file);
   }
 
-  static QString find_translator_file (QString language);
+  static QString find_translator_file (const QString& language);
 
   static void update_network_settings (void)
   {
@@ -101,7 +101,7 @@
 
   void do_reload_settings (void);
 
-  void do_set_settings (QString file);
+  void do_set_settings (const QString& file);
 
   void do_update_network_settings (void);