Add a temporary name filter for the main view.

By using 'F' in the main view you can enter a regex
that will be used to filter the view based on the torrent name.
To remove the filter set the input to empty.
This is adding a 'view.temp_filter' property and a 'match{}' function.
For example with Ctrl+X you could do:
command> view.temp_filter=main,"match={d.name=,.*linux.*iso}"

src/core/view.cc

@@ -89,17 +89,21 @@ struct view_downloads_compare : std::binary_function<Download*, Download*, bool>
 };
 
 struct view_downloads_filter : std::unary_function<Download*, bool> {
-  view_downloads_filter(const torrent::Object& cmd) : m_command(cmd) {}
+  view_downloads_filter(const torrent::Object& cmd, const torrent::Object& cmd2) : m_command(cmd), m_command2(cmd2) {}
 
   bool operator () (Download* d1) const {
-    if (m_command.is_empty())
+    return this->evalCmd(m_command, d1) && this->evalCmd(m_command2, d1);
+  }
+
+  bool evalCmd(const torrent::Object& cmd, Download* d1) const {
+    if (cmd.is_empty())
       return true;
 
     try {
       torrent::Object result;
 
-      if (m_command.is_dict_key()) {
-        // torrent::Object tmp_command = m_command;
+      if (cmd.is_dict_key()) {
+        // torrent::Object tmp_command = cmd;
 
         // uint32_t flags = tmp_command.flags() & torrent::Object::mask_function;
         // tmp_command.unset_flags(torrent::Object::mask_function);
@@ -109,10 +113,10 @@ struct view_downloads_filter : std::unary_function<Download*, bool> {
         // result = rpc::commands.call_command(tmp_command.as_dict_key().c_str(), tmp_command.as_dict_obj(),
         //                                     rpc::make_target(d1));
 
-        result = rpc::commands.call_command(m_command.as_dict_key().c_str(), m_command.as_dict_obj(), rpc::make_target(d1));
+        result = rpc::commands.call_command(cmd.as_dict_key().c_str(), cmd.as_dict_obj(), rpc::make_target(d1));
 
       } else {
-        result = rpc::parse_command_single(rpc::make_target(d1), m_command.as_string());
+        result = rpc::parse_command_single(rpc::make_target(d1), cmd.as_string());
       }
 
       switch (result.type()) {
@@ -136,6 +140,7 @@ struct view_downloads_filter : std::unary_function<Download*, bool> {
   }
 
   const torrent::Object&       m_command;
+  const torrent::Object&       m_command2;
 };
 
 void
@@ -262,8 +267,8 @@ View::filter() {
     return;
 
   // Parition the list in two steps so we know which elements changed.
-  iterator splitVisible  = std::stable_partition(begin_visible(),  end_visible(),  view_downloads_filter(m_filter));
-  iterator splitFiltered = std::stable_partition(begin_filtered(), end_filtered(), view_downloads_filter(m_filter));
+  iterator splitVisible  = std::stable_partition(begin_visible(),  end_visible(),  view_downloads_filter(m_filter, m_tempFilter));
+  iterator splitFiltered = std::stable_partition(begin_filtered(), end_filtered(), view_downloads_filter(m_filter, m_tempFilter));
 
   base_type changed(splitVisible, splitFiltered);
   iterator splitChanged = changed.begin() + std::distance(splitVisible, end_visible());
@@ -302,7 +307,7 @@ View::filter_download(core::Download* download) {
   if (itr == base_type::end())
     throw torrent::internal_error("View::filter_download(...) could not find download.");
 
-  if (view_downloads_filter(m_filter)(download)) {
+  if (view_downloads_filter(m_filter, m_tempFilter)(download)) {
       
     if (itr >= end_visible()) {
       erase_internal(itr);

src/core/view.h

@@ -124,6 +124,8 @@ public:
 
   const torrent::Object& get_filter() const { return m_filter; }
   void                set_filter(const torrent::Object& s)        { m_filter = s; }
+  const torrent::Object& get_temp_filter() const { return m_tempFilter; }
+  void                set_temp_filter(const torrent::Object& s)        { m_tempFilter = s; }
   void                set_filter_on_event(const std::string& event);
 
   void                clear_filter_on();
@@ -172,6 +174,7 @@ private:
   torrent::Object     m_sortCurrent;
 
   torrent::Object     m_filter;
+  torrent::Object     m_tempFilter; // Temporary view filter (eg: name based filter)
 
   torrent::Object     m_event_added;
   torrent::Object     m_event_removed;

src/core/view_manager.cc

@@ -109,6 +109,14 @@ ViewManager::set_filter(const std::string& name, const torrent::Object& cmd) {
   (*viewItr)->filter();
 }
 
+void
+ViewManager::set_temp_filter(const std::string& name, const torrent::Object& cmd) {
+  iterator viewItr = find_throw(name);
+
+  (*viewItr)->set_temp_filter(cmd);
+  (*viewItr)->filter();
+}
+
 void
 ViewManager::set_filter_on(const std::string& name, const filter_args& args) {
   iterator viewItr = find_throw(name);

src/core/view_manager.h

@@ -93,6 +93,7 @@ public:
   void                set_sort_current(const std::string& name, const torrent::Object& cmd) { (*find_throw(name))->set_sort_current(cmd); }
 
   void                set_filter(const std::string& name, const torrent::Object& cmd);
+  void                set_temp_filter(const std::string& name, const torrent::Object& cmd);
   void                set_filter_on(const std::string& name, const filter_args& args);
 
   void                set_event_added(const std::string& name, const torrent::Object& cmd)   { (*find_throw(name))->set_event_added(cmd); }