Adding view of tracker list.

git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@338 e378c898-3ddf-0310-93e7-cc216c733640

src/display/window_tracker_list.cc

@@ -0,0 +1,55 @@
+#include "config.h"
+
+#include <stdexcept>
+
+#include "core/download.h"
+#include "rak/algorithm.h"
+
+#include "window_tracker_list.h"
+
+namespace display {
+
+WindowTrackerList::WindowTrackerList(core::Download* d, unsigned int* focus) :
+  Window(new Canvas, true),
+  m_download(d),
+  m_focus(focus) {
+}
+
+void
+WindowTrackerList::redraw() {
+  // TODO: Make this depend on tracker signal.
+  m_nextDraw = utils::Timer::cache().round_seconds() + 10 * 1000000;
+  m_canvas->erase();
+
+  int pos = 0;
+
+  m_canvas->print( 2, pos, "Trackers:");
+
+  ++pos;
+
+  if (m_download->get_download().get_tracker_size() == 0)
+    return;
+
+  if (*m_focus >= m_download->get_download().get_tracker_size())
+    throw std::logic_error("WindowTrackerList::redraw() called on an object with a bad focus value");
+
+  typedef std::pair<unsigned int, unsigned int> Range;
+
+  Range range = rak::advance_bidirectional<unsigned int>(0,
+							 *m_focus,
+							 m_download->get_download().get_tracker_size(),
+							 m_canvas->get_height());
+
+  while (range.first != range.second) {
+    torrent::Tracker t = m_download->get_download().get_tracker(range.first);
+
+    m_canvas->print(0, pos, "%c %s",
+		    range.first == *m_focus ? '*' : ' ',
+		    t.get_url().c_str());
+
+    ++range.first;
+    ++pos;
+  }
+}
+
+}