1 files changed, 81 insertions, 0 deletions

diff --git a/src/FbTk/Subject.cc b/src/FbTk/Subject.cc
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+++ b/src/FbTk/Subject.cc
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+// Subject.cc for FbTk
+// Copyright (c) 2002 - 2003 Henrik Kinnunen (fluxgen<at>users.sourceforge.net)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+// $Id: Subject.cc,v 1.3 2003/09/08 15:38:46 fluxgen Exp $
+
+#include "Subject.hh"
+#include "Observer.hh"
+
+#include <algorithm>
+#include <functional>
+
+namespace FbTk {
+
+Subject::SubjectList Subject::s_subjectlist;
+
+Subject::Subject():m_notify_mode(false) {
+    s_subjectlist.push_back(this);
+}
+
+Subject::~Subject() {
+    s_subjectlist.erase(std::remove(s_subjectlist.begin(),
+                                    s_subjectlist.end(), this));
+}
+
+void Subject::attach(Observer *obj) {
+    m_observerlist.push_back(obj);
+    // no need to have more than one instance of an observer
+    m_observerlist.erase(std::unique(m_observerlist.begin(), m_observerlist.end()),
+                         m_observerlist.end());
+}
+
+void Subject::detach(Observer *obj) {
+    if (m_notify_mode)
+        m_dead_observers.push_back(obj);
+    else {
+        m_observerlist.erase(std::remove(m_observerlist.begin(),
+                                         m_observerlist.end(), obj),
+                             m_observerlist.end());
+    }
+}
+
+void Subject::notify() {
+    m_notify_mode = true;
+    std::for_each(m_observerlist.begin(), m_observerlist.end(),
+                  std::bind2nd(std::mem_fun(&Observer::update), this));
+    m_notify_mode = false;
+
+    // remove dead observers
+    if (m_dead_observers.size()) {
+        std::for_each(m_dead_observers.begin(),
+                      m_dead_observers.end(),
+                      std::bind1st(std::mem_fun(&Subject::detach), this));
+        m_dead_observers.clear();
+    }
+}
+
+void Subject::removeObserver(Observer *obj) {
+    std::for_each(s_subjectlist.begin(), s_subjectlist.end(),
+                  std::bind2nd(std::mem_fun(&Subject::detach), obj));
+
+}
+
+}; // end namespace FbTk