# 
# patch "rev_file_info.cc"
#  from [33d3e34996aa1ee822b9a03018cbb87370e67fac]
#    to [455cef600d8716d948c7075f51464a935edb1246]
# 
# patch "rev_file_info.hh"
#  from [73ee71dfbd46328c3aa905c1fdc0eaf354568c85]
#    to [d44b55176f4b984d5a98b1bc85992578f018012f]
# 
========================================================================
--- rev_file_info.cc	33d3e34996aa1ee822b9a03018cbb87370e67fac
+++ rev_file_info.cc	455cef600d8716d948c7075f51464a935edb1246
@@ -1,23 +1,72 @@
 // Copyright 2005   Timothy Brownawell   <address@hidden>
 // Licensed to the public under the GNU GPL v2, see COPYING
 
 #include "rev_file_info.hh"
 
+#include <boost/lexical_cast.hpp>
+
 rev_file_info::rev_file_info()
 {
   fcontents.set_editable(false);
   fdiff.set_editable(false);
+  current = fcontents.get_buffer()->create_tag();
+  current->property_foreground() = "brown";
   fcommwin.add(fcomment);
   fcontwin.add(fcontents);
   fdiffwin.add(fdiff);
   append_page(fdiffwin, "File diff");
   append_page(fcontwin, "File contents");
   append_page(fcommwin, "File comment");
-  fcontents.set_editable(false);
   Glib::RefPtr<Gtk::TextBuffer> b = fcomment.get_buffer();
   commentend = b->create_mark(b->end());
+  fdiff.signal_button_press_event()
+    .connect_notify(sigc::mem_fun(*this, &rev_file_info::diff_clicked));
 }
 
+void rev_file_info::diff_clicked(GdkEventButton *b)
+{
+//  Gtk::TextIter i;
+//  fdiff.get_iter_at_location(i, int(b->x), int(b->y));
+//  std::cout<<"Click!\n";
+}
+
+Glib::RefPtr<Gtk::TextTag>
+rev_file_info::hypertag(Glib::RefPtr<Gtk::TextBuffer> b, int line, int eline)
+{
+  Glib::RefPtr<Gtk::TextTag> t = b->create_tag();
+  t->property_underline() = Pango::UNDERLINE_SINGLE;
+  t->property_foreground() = "blue";
+  link_tag_to(t, line, eline);
+  return t;
+}
+
+void rev_file_info::link_tag_to(Glib::RefPtr<Gtk::TextTag> &t,
+                                int line, int eline)
+{
+  t->signal_event().connect(sigc::bind(
+                            sigc::bind(sigc::mem_fun(*this,
+                                       &rev_file_info::tag_event),
+                            eline), line));
+}
+bool rev_file_info::tag_event(Glib::RefPtr<Glib::Object> const &p,
+                              GdkEvent *e, Gtk::TextIter const &it,
+                              int line, int eline)
+{
+  GdkEventType et = e->type;
+  if (et == GDK_BUTTON_RELEASE)
+    {
+      Glib::RefPtr<Gtk::TextBuffer> b = fcontents.get_buffer();
+      Gtk::TextIter i = b->get_iter_at_line(line);
+      Gtk::TextIter j = b->get_iter_at_line(eline+1)--;
+      fcontents.scroll_to(i);
+      b->remove_tag(current, b->begin(), b->end());
+      b->apply_tag(current, i, j);
+      property_page() = 1;
+      GdkEventButton *be = &e->button;
+    }
+  return false;
+}
+
 void
 rev_file_info::set_contents(Glib::ustring const & s)
 {
@@ -33,6 +82,29 @@
 {
   Glib::RefPtr<Gtk::TextBuffer> b = fdiff.get_buffer();
   b->set_text(s);
+
+  try {
+  // every line "@@ -a,b +c,d @@" gets linked to line c of "File contents"
+  int n = 0, m = 0;
+  while ((n = s.find("\n@@", m)) != s.npos && n >= m)
+    {
+      m = s.find("@@\n", n);
+      if (m == s.npos)
+        break;
+      int plus = s.find("+", n);
+      int comma = s.find(",", plus);
+      int space = s.find(" ", comma);
+      if (plus > comma || comma > space || space > m)
+        continue;
+      Glib::ustring line = s.substr(plus, comma-plus);
+      Glib::ustring size = s.substr(comma+1, space-comma-1);
+      int l = boost::lexical_cast<int>(line);
+      int s = boost::lexical_cast<int>(size);
+      Glib::RefPtr<Gtk::TextTag> t = hypertag(b, l, l+s);
+      b->apply_tag(t, b->get_iter_at_offset(n+1), b->get_iter_at_offset(m+2));
+    }
+  } catch (std::exception &) {}
+
   Glib::RefPtr<Gtk::TextTag> t = b->create_tag();
   t->property_family() = "monospace";
   b->apply_tag(t, b->begin(), b->end());
========================================================================
--- rev_file_info.hh	73ee71dfbd46328c3aa905c1fdc0eaf354568c85
+++ rev_file_info.hh	d44b55176f4b984d5a98b1bc85992578f018012f
@@ -29,6 +29,15 @@
   Gtk::ScrolledWindow fcontwin;
   Gtk::ScrolledWindow fdiffwin;
   Glib::RefPtr<Gtk::TextMark> commentend;
+  Glib::RefPtr<Gtk::TextTag> current;
+
+  void diff_clicked(GdkEventButton *b);
+  Glib::RefPtr<Gtk::TextTag>
+   hypertag(Glib::RefPtr<Gtk::TextBuffer> b, int line, int eline);
+  bool tag_event(Glib::RefPtr<Glib::Object> const &p,
+                   GdkEvent *e, Gtk::TextIter const &it,
+                   int line, int eline);
+  void link_tag_to(Glib::RefPtr<Gtk::TextTag> &t, int line, int eline);
 public:
   rev_file_info();