Fixed double click to select whole variable in Linux.

src/source.cc

@@ -390,6 +390,28 @@ bool Source::View::on_key_press_event(GdkEventKey* key) {
   return stop;
 }
 
+bool Source::View::on_button_press_event(GdkEventButton *event) {
+  if(event->type==GDK_2BUTTON_PRESS) {
+    Gtk::TextIter start, end;
+    if(get_buffer()->get_selection_bounds(start, end)) {
+      auto iter=start;
+      while((*iter>=48 && *iter<=57) || (*iter>=65 && *iter<=90) || (*iter>=97 && *iter<=122) || *iter==95) {
+        start=iter;
+        if(!iter.backward_char())
+          break;
+      }
+      while((*end>=48 && *end<=57) || (*end>=65 && *end<=90) || (*end>=97 && *end<=122) || *end==95) {
+        if(!end.forward_char())
+          break;
+      }
+      get_buffer()->select_range(start, end);
+      return true;
+    }
+  }
+  
+  return Gsv::View::on_button_press_event(event);
+}
+
 std::pair<char, unsigned> Source::View::find_tab_char_and_size() {
   const std::regex indent_regex("^([ \t]+).*$");
   auto size=get_buffer()->get_line_count();

src/source.h

@@ -80,6 +80,7 @@ namespace Source {
     std::string get_line_before_insert();
 
     bool on_key_press_event(GdkEventKey* key);
+    bool on_button_press_event(GdkEventButton *event);
     
     std::pair<char, unsigned> find_tab_char_and_size();
     unsigned tab_size;