* Starting work on ElementText for displaying generic information.

* If a storage error was thrown from make_directory in
EntryList::open, it would try to erase a FileMeta that wasn't inserted.


git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@753 e378c898-3ddf-0310-93e7-cc216c733640

src/core/download.cc

@@ -91,6 +91,8 @@ Download::Download(download_type d) :
 
   m_variables.insert("directory",          new utils::VariableStringSlot(rak::mem_fn(&m_fileList, &torrent::FileList::root_dir), rak::mem_fn(this, &Download::set_root_directory)));
 
+  m_variables.insert("info_hash",          new utils::VariableStringSlot(rak::mem_fn(&m_download, &torrent::Download::info_hash), NULL));
+
   m_variables.insert("min_peers",          new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::peers_min), rak::mem_fn(&m_download, &download_type::set_peers_min)));
   m_variables.insert("max_peers",          new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::peers_max), rak::mem_fn(&m_download, &download_type::set_peers_max)));
   m_variables.insert("max_uploads",        new utils::VariableValueSlot(rak::mem_fn(&m_download, &download_type::uploads_max), rak::mem_fn(&m_download, &download_type::set_uploads_max)));

src/core/download.h

@@ -37,6 +37,7 @@
 #ifndef RTORRENT_CORE_DOWNLOAD_H
 #define RTORRENT_CORE_DOWNLOAD_H
 
+#include <rak/string_manip.h>
 #include <sigc++/connection.h>
 #include <torrent/download.h>
 #include <torrent/file_list.h>
@@ -83,13 +84,14 @@ public:
   const std::string&  variable_string(const std::string& key) const  { return m_variables.get_string(key); }
 
   download_type*       download()                              { return &m_download; }
-  const download_type* download() const                        { return &m_download; }
+  const download_type* c_download() const                      { return &m_download; }
 
   torrent::Object*    bencode()                                { return m_download.bencode(); }
   file_list_type*     file_list()                              { return &m_fileList; }
   tracker_list_type*  tracker_list()                           { return &m_trackerList; }
 
   const std::string&  info_hash() const                        { return m_download.info_hash(); }
+  std::string         info_hash_hex() const                    { return rak::transform_hex(m_download.info_hash()); }
 
   const std::string&  message() const                          { return m_message; }
   void                set_message(const std::string& msg)      { m_message = msg; }

src/display/text_element.h

@@ -38,6 +38,7 @@
 #define RTORRENT_DISPLAY_TEXT_ELEMENT_H
 
 #include <vector>
+#include <inttypes.h>
 
 #include "display/canvas.h"
 

src/display/text_element_list.cc

@@ -51,20 +51,33 @@ TextElementList::clear() {
 
 char*
 TextElementList::print(char* first, const char* last, Canvas::attributes_list* attributes, void* object) {
+  int column = m_columnWidth != NULL ? m_column : 0;
+
   // Call print for each element even if first == last so that any
   // attributes gets added to the list.
   for (iterator itr = begin(); itr != end(); ++itr)
-    first = (*itr)->print(first, last, attributes, object);
+    if (column-- > 0) {
+      const char* columnEnd = std::min<const char*>(last, first + *m_columnWidth);
+
+      first = (*itr)->print(first, columnEnd, attributes, object);
+
+      std::memset(first, ' ', columnEnd - first);
+      first += columnEnd - first;
+
+    } else {
+      first = (*itr)->print(first, last, attributes, object);
+    }
 
   return first;
 }
 
 TextElementList::extent_type
 TextElementList::max_length() {
-  size_type length = 0;
+  extent_type length = 0;
+  int column = m_columnWidth != NULL ? m_column : 0;
 
   for (iterator itr = begin(); itr != end(); ++itr) {
-    size_type l = (*itr)->max_length();
+    extent_type l = column-- > 0 ? std::min((*itr)->max_length(), *m_columnWidth) : (*itr)->max_length();
 
     if (l == extent_full)
       return extent_full;

src/display/text_element_list.h

@@ -61,13 +61,21 @@ public:
 
   using base_type::push_back;
 
+  TextElementList() : m_column(0), m_columnWidth(0) {}
   virtual ~TextElementList() { clear(); }
 
   void                clear();
 
+  void                set_column(unsigned int column)      { m_column = column; }
+  void                set_column_width(extent_type* width) { m_columnWidth = width; }
+
   virtual char*       print(char* first, const char* last, Canvas::attributes_list* attributes, void* object);
 
   virtual extent_type max_length();
+
+private:
+  unsigned int        m_column;
+  extent_type*        m_columnWidth;
 };
 
 }

src/display/text_element_string.cc

@@ -36,21 +36,12 @@
 
 #include "config.h"
 
-#include <cstring>
-
 #include "text_element_string.h"
 
 namespace display {
 
 char*
-TextElementString::print(char* first, const char* last, Canvas::attributes_list* attributes, void* object) {
-  size_t length = std::min<size_t>(last - first, m_string.size());
-  
-  if (length == 0)
-    return first;
-
-  std::memcpy(first, m_string.c_str(), length);
-
+TextElementStringBase::print(char* first, const char* last, Canvas::attributes_list* attributes, void* object) {
   // Move this stuff into a function in TextElement.
   Attributes base = attributes->back();
   Attributes current(NULL, m_attributes, Attributes::color_invalid);
@@ -65,17 +56,33 @@ TextElementString::print(char* first, const char* last, Canvas::attributes_list*
   else if (current.colors() != base.colors())
     current.set_position(first);
 
+  first = copy_string(first, last, object);
+
   if (current.position() != NULL) {
     attributes->push_back(current);
-    attributes->push_back(Attributes(first + length, base.attributes(), base.colors()));
+    attributes->push_back(Attributes(first, base.attributes(), base.colors()));
   }
 
+  return first;
+}
+
+char*
+TextElementString::copy_string(char* first, const char* last, void* object) {
+  extent_type length = std::min<extent_type>(last - first, m_string.size());
+  
+  if (length == 0)
+    return first;
+
+  std::memcpy(first, m_string.c_str(), std::min<extent_type>(length, last - first));
+
   return first + length;
 }
 
-TextElementString::extent_type
-TextElementString::max_length() {
-  return m_string.size();
+char*
+TextElementCString::copy_string(char* first, const char* last, void* object) {
+  std::memcpy(first, m_string, std::min<extent_type>(m_length, last - first));
+
+  return first + m_length;
 }
 
 }

src/display/text_element_string.h

@@ -37,32 +37,105 @@
 #ifndef RTORRENT_DISPLAY_TEXT_ELEMENT_LIST_H
 #define RTORRENT_DISPLAY_TEXT_ELEMENT_LIST_H
 
+#include <iterator>
 #include <string>
+#include <cstring>
 
 #include "text_element.h"
 
 namespace display {
 
-class TextElementString : public TextElement {
+class TextElementStringBase : public TextElement {
 public:
-  TextElementString() {}
-  TextElementString(const std::string& s, int attributes = Attributes::a_invalid) : m_string(s), m_attributes(attributes) {}
-
-  const std::string&  str() const                   { return m_string; }
-  void                set_str(const std::string& s) { m_string = s; }
-
   int                 attributes() const            { return m_attributes; }
   void                set_attributes(int a)         { m_attributes = a; }
 
   virtual char*       print(char* first, const char* last, Canvas::attributes_list* attributes, void* object);
 
-  virtual extent_type max_length();
+protected:
+  virtual char*       copy_string(char* first, const char* last, void* object) = 0;
 
-private:
-  std::string         m_string;
   int                 m_attributes;
 };
 
+class TextElementString : public TextElementStringBase {
+public:
+  TextElementString(const std::string& s, int attributes = Attributes::a_invalid) :
+    m_string(s) { m_attributes = attributes; }
+
+  const std::string&  str() const                   { return m_string; }
+  void                set_str(const std::string& s) { m_string = s; }
+
+private:
+  virtual extent_type max_length()                  { return m_string.size(); }
+
+  virtual char*       copy_string(char* first, const char* last, void* object);
+
+  std::string         m_string;
+};
+
+class TextElementCString : public TextElementStringBase {
+public:
+  TextElementCString(const char* s, int attributes = Attributes::a_invalid) :
+    m_length(std::strlen(s)), m_string(s) {
+    m_attributes = attributes;
+  }
+
+private:
+  virtual extent_type max_length()                  { return m_length; }
+
+  virtual char*       copy_string(char* first, const char* last, void* object);
+
+  extent_type         m_length;
+  const char*         m_string;
+};
+
+template <typename slot_type>
+class TextElementStringSlot : public TextElementStringBase {
+public:
+  typedef typename slot_type::argument_type arg1_type;
+  typedef typename slot_type::result_type   result_type;
+
+  TextElementStringSlot(const slot_type& slot, int attributes = Attributes::a_invalid) :
+    m_length(extent_full), m_slot(slot) {
+    m_attributes = attributes;
+  }
+
+private:
+  virtual extent_type max_length()                  { return m_length; }
+
+  virtual char* copy_string(char* first, const char* last, void* object) {
+    arg1_type arg1 = reinterpret_cast<arg1_type>(object);
+
+    if (arg1 == NULL)
+      return first;
+
+    result_type result = m_slot(arg1);
+    extent_type length = std::min<extent_type>(result_length(&result), last - first);
+
+    std::memcpy(first, result_buffer(&result), length);
+
+    return first + length;
+  }
+
+  template <typename Result>
+  extent_type result_length(Result* result)      { return result->size(); }
+  extent_type result_length(const char** result) { return std::strlen(*result); }
+
+  template <typename Result>
+  const char* result_buffer(Result* result)      { return result->c_str(); }
+  const char* result_buffer(const char** result) { return *result; }
+
+  extent_type         m_length;
+  slot_type           m_slot;
+};
+
+template <typename slot_type>
+inline TextElementStringSlot<slot_type>*
+text_element_string_slot(const slot_type& slot, int attributes = Attributes::a_invalid) {
+  return new TextElementStringSlot<slot_type>(slot, attributes);
+}
+
 }
 
 #endif

src/display/window_text.cc

@@ -58,8 +58,14 @@ WindowText::push_back(TextElement* element) {
 //   m_minHeight = size();
   m_maxHeight = size();
 
-  if (element != NULL)
-    m_maxWidth = std::max(m_maxWidth, element->max_length() + 2);
+  if (element != NULL) {
+    extent_type width = element->max_length();
+
+    if (width == extent_full)
+      m_maxWidth = extent_full;
+    else
+      m_maxWidth = std::max(m_maxWidth, element->max_length() + m_margin);
+  }
 
   // Check if active, if so do the update thingie. Or be lazy?
 }
@@ -80,7 +86,7 @@ WindowText::redraw() {
     Canvas::attributes_list attributes;
     attributes.push_back(Attributes(buffer, Attributes::a_normal, Attributes::color_default));
 
-    char* last = (*itr)->print(buffer, buffer + m_canvas->width(), &attributes, NULL);
+    char* last = (*itr)->print(buffer, buffer + m_canvas->width(), &attributes, m_object);
 
     m_canvas->print_attributes(0, position, buffer, last, &attributes);
   }

src/display/window_text.h

@@ -62,7 +62,8 @@ public:
   using base_type::rbegin;
   using base_type::rend;
 
-  WindowText() : Window(new Canvas, 0, 0, 0, extent_static, extent_static) {}
+  WindowText(void* object = NULL, extent_type margin = 0) :
+    Window(new Canvas, 0, 0, 0, extent_static, extent_static), m_object(object), m_margin(margin) {}
   ~WindowText() { clear(); }
 
   void                clear();
@@ -70,6 +71,11 @@ public:
   void                push_back(TextElement* element);
 
   virtual void        redraw();
+
+private:
+  void*               m_object;
+
+  extent_type         m_margin;
 };
 
 }

src/ui/Makefile.am

@@ -20,6 +20,8 @@ libsub_ui_a_SOURCES = \
 	element_peer_list.h \
 	element_string_list.cc \
 	element_string_list.h \
+	element_text.cc \
+	element_text.h \
 	element_tracker_list.cc \
 	element_tracker_list.h \
 	element_transfer_list.cc \

src/ui/download.cc

@@ -38,6 +38,7 @@
 
 #include <sigc++/bind.h>
 #include <rak/functional.h>
+#include <rak/string_manip.h>
 #include <torrent/exceptions.h>
 #include <torrent/torrent.h>
 #include <torrent/tracker_list.h>
@@ -47,11 +48,14 @@
 #include "display/window_title.h"
 #include "display/window_download_statusbar.h"
 
+#include "display/text_element_string.h"
+
 #include "control.h"
 #include "download.h"
 #include "root.h"
 #include "element_file_list.h"
 #include "element_menu.h"
+#include "element_text.h"
 #include "element_peer_list.h"
 #include "element_tracker_list.h"
 #include "element_chunks_seen.h"
@@ -59,7 +63,7 @@
 
 namespace ui {
 
-Download::Download(DPtr d) :
+Download::Download(core::Download* d) :
   m_download(d),
   m_state(DISPLAY_MAX_SIZE),
   m_focusDisplay(false) {
@@ -67,31 +71,9 @@ Download::Download(DPtr d) :
   m_windowDownloadStatus = new WDownloadStatus(d);
   m_windowDownloadStatus->set_bottom(true);
 
-  ElementMenu* elementMenu = new ElementMenu;
-
-  elementMenu->push_back("Peer List",
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_PEER_LIST),
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_PEER_LIST));
-//   elementMenu->push_back("Peer Info",
-//                          sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_PEER_INFO),
-//                          sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_PEER_INFO));
-  elementMenu->push_back("File List",
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_FILE_LIST),
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_FILE_LIST));
-  elementMenu->push_back("Tracker List",
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_TRACKER_LIST),
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_TRACKER_LIST));
-  elementMenu->push_back("Chunks Seen",
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_CHUNKS_SEEN),
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_CHUNKS_SEEN));
-  elementMenu->push_back("Transfer List",
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_TRANSFER_LIST),
-                         sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_TRANSFER_LIST));
-
-  elementMenu->set_entry(0);
-
-  m_uiArray[DISPLAY_MENU]          = elementMenu;
+  m_uiArray[DISPLAY_MENU]          = create_menu();
   m_uiArray[DISPLAY_PEER_LIST]     = new ElementPeerList(d);
+  m_uiArray[DISPLAY_INFO]          = create_info();
   m_uiArray[DISPLAY_FILE_LIST]     = new ElementFileList(d);
   m_uiArray[DISPLAY_TRACKER_LIST]  = new ElementTrackerList(d);
   m_uiArray[DISPLAY_CHUNKS_SEEN]   = new ElementChunksSeen(d);
@@ -99,6 +81,7 @@ Download::Download(DPtr d) :
 
   m_uiArray[DISPLAY_MENU]->slot_exit(sigc::mem_fun(&m_slotExit, &slot_type::operator()));
   m_uiArray[DISPLAY_PEER_LIST]->slot_exit(sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_PEER_LIST));
+  m_uiArray[DISPLAY_INFO]->slot_exit(sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_INFO));
   m_uiArray[DISPLAY_FILE_LIST]->slot_exit(sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_FILE_LIST));
   m_uiArray[DISPLAY_TRACKER_LIST]->slot_exit(sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_TRACKER_LIST));
   m_uiArray[DISPLAY_CHUNKS_SEEN]->slot_exit(sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_CHUNKS_SEEN));
@@ -116,6 +99,48 @@ Download::~Download() {
   delete m_windowDownloadStatus;
 }
 
+inline ElementBase*
+Download::create_menu() {
+  ElementMenu* element = new ElementMenu;
+
+  element->push_back("Peer List",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_PEER_LIST),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_PEER_LIST));
+  element->push_back("Info",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_INFO),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_INFO));
+  element->push_back("File List",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_FILE_LIST),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_FILE_LIST));
+  element->push_back("Tracker List",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_TRACKER_LIST),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_TRACKER_LIST));
+  element->push_back("Chunks Seen",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_CHUNKS_SEEN),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_CHUNKS_SEEN));
+  element->push_back("Transfer List",
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_focus), DISPLAY_TRANSFER_LIST),
+                     sigc::bind(sigc::mem_fun(this, &Download::activate_display_menu), DISPLAY_TRANSFER_LIST));
+
+  element->set_entry(0);
+
+  return element;
+}
+
+inline ElementBase*
+Download::create_info() {
+  ElementText* element = new ElementText(m_download);
+
+  element->set_column(1);
+
+  element->push_column(new display::TextElementCString("Name:"),      display::text_element_string_slot(rak::on(std::mem_fun(&core::Download::c_download), std::mem_fun(&torrent::Download::name))));
+  element->push_column(new display::TextElementCString("Info Hash:"), display::text_element_string_slot(std::mem_fun(&core::Download::info_hash_hex)));
+
+  element->set_column_width(element->column_width() + 1);
+
+  return element;
+}
+
 void
 Download::activate(display::Frame* frame, bool focus) {
   if (is_active())
@@ -166,6 +191,7 @@ Download::activate_display(Display displayType, bool focusDisplay) {
     break;
 
   case DISPLAY_PEER_LIST:
+  case DISPLAY_INFO:
   case DISPLAY_FILE_LIST:
   case DISPLAY_TRACKER_LIST:
   case DISPLAY_CHUNKS_SEEN:
@@ -189,6 +215,7 @@ Download::activate_display(Display displayType, bool focusDisplay) {
     break;
 
   case DISPLAY_PEER_LIST:
+  case DISPLAY_INFO:
   case DISPLAY_FILE_LIST:
   case DISPLAY_TRACKER_LIST:
   case DISPLAY_CHUNKS_SEEN:

src/ui/download.h

@@ -60,12 +60,12 @@ class Download : public ElementBase {
 public:
   typedef display::WindowDownloadStatusbar WDownloadStatus;
 
-  typedef core::Download*                  DPtr;
   typedef std::list<torrent::Peer>         PList;
 
   typedef enum {
     DISPLAY_MENU,
     DISPLAY_PEER_LIST,
+    DISPLAY_INFO,
     DISPLAY_FILE_LIST,
     DISPLAY_TRACKER_LIST,
     DISPLAY_CHUNKS_SEEN,
@@ -73,7 +73,7 @@ public:
     DISPLAY_MAX_SIZE
   } Display;
 
-  Download(DPtr d);
+  Download(core::Download* d);
   ~Download();
 
   void                activate(display::Frame* frame, bool focus = true);
@@ -93,13 +93,16 @@ private:
   Download(const Download&);
   void operator = (const Download&);
 
+  inline ElementBase* create_menu();
+  inline ElementBase* create_info();
+
   void                receive_max_uploads(int t);
   void                receive_min_peers(int t);
   void                receive_max_peers(int t);
 
   void                bind_keys();
 
-  DPtr                m_download;
+  core::Download*     m_download;
 
   Display             m_state;
   ElementBase*        m_uiArray[DISPLAY_MAX_SIZE];

src/ui/element_menu.cc

@@ -49,14 +49,14 @@
 namespace ui {
 
 struct ElementMenuEntry {
-  display::TextElementString* m_element;
+  display::TextElementStringBase* m_element;
 
-  ElementMenu::slot_type      m_slotFocus;
-  ElementMenu::slot_type      m_slotSelect;
+  ElementMenu::slot_type          m_slotFocus;
+  ElementMenu::slot_type          m_slotSelect;
 };
 
 ElementMenu::ElementMenu() :
-  m_window(new WindowText),
+  m_window(new WindowText(NULL, 2)),
   m_entry(entry_invalid) {
 
   // Move bindings into a function that defines default bindings.
@@ -103,10 +103,10 @@ ElementMenu::disable() {
 }
 
 void
-ElementMenu::push_back(const std::string& name, const slot_type& slotSelect, const slot_type& slotFocus) {
+ElementMenu::push_back(const char* name, const slot_type& slotSelect, const slot_type& slotFocus) {
   entry_type* entry = new entry_type;
 
-  entry->m_element    = new display::TextElementString(name);
+  entry->m_element    = new display::TextElementCString(name);
   entry->m_slotSelect = slotSelect;
   entry->m_slotFocus  = slotFocus;
 

src/ui/element_menu.h

@@ -81,7 +81,8 @@ public:
   // Consider returning a pointer that can be used to manipulate
   // entries, f.ex disabling them.
 
-  void                push_back(const std::string& name,
+  // The c string is not copied nor freed, so it should be constant.
+  void                push_back(const char* name,
                                 const slot_type& slotSelect = slot_type(),
                                 const slot_type& slotFocus = slot_type());
 

src/ui/element_text.cc

@@ -0,0 +1,121 @@
+// rTorrent - BitTorrent client
+// Copyright (C) 2005-2006, Jari Sundell
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+// In addition, as a special exception, the copyright holders give
+// permission to link the code of portions of this program with the
+// OpenSSL library under certain conditions as described in each
+// individual source file, and distribute linked combinations
+// including the two.
+//
+// You must obey the GNU General Public License in all respects for
+// all of the code used other than OpenSSL.  If you modify file(s)
+// with this exception, you may extend this exception to your version
+// of the file(s), but you are not obligated to do so.  If you do not
+// wish to do so, delete this exception statement from your version.
+// If you delete this exception statement from all source files in the
+// program, then also delete it here.
+//
+// Contact:  Jari Sundell <jaris@ifi.uio.no>
+//
+//           Skomakerveien 33
+//           3185 Skoppum, NORWAY
+
+#include "config.h"
+
+#include <torrent/exceptions.h>
+
+#include "display/frame.h"
+#include "display/window_text.h"
+#include "display/text_element_list.h"
+#include "display/text_element_string.h"
+#include "input/manager.h"
+
+#include "control.h"
+#include "element_text.h"
+
+namespace ui {
+
+ElementText::ElementText(void *object) :
+  m_window(new WindowText(object)),
+  m_column(0),
+  m_columnWidth(0) {
+
+  // Move bindings into a function that defines default bindings.
+  m_bindings[KEY_LEFT] = sigc::mem_fun(&m_slotExit, &slot_type::operator());  
+
+//   m_bindings[KEY_UP]    = sigc::mem_fun(this, &ElementText::entry_prev);
+//   m_bindings[KEY_DOWN]  = sigc::mem_fun(this, &ElementText::entry_next);
+//   m_bindings[KEY_RIGHT] = sigc::mem_fun(this, &ElementText::entry_select);
+}
+
+ElementText::~ElementText() {
+  delete m_window;
+}
+
+void
+ElementText::activate(display::Frame* frame, bool focus) {
+  if (is_active())
+    throw torrent::client_error("ui::ElementText::activate(...) is_active().");
+
+  if (focus)
+    control->input()->push_back(&m_bindings);
+
+  m_focus = focus;
+
+  m_frame = frame;
+  m_frame->initialize_window(m_window);
+
+  m_window->set_active(true);
+}
+
+void
+ElementText::disable() {
+  if (!is_active())
+    throw torrent::client_error("ui::ElementText::disable(...) !is_active().");
+
+  control->input()->erase(&m_bindings);
+
+  m_frame->clear();
+  m_frame = NULL;
+
+  m_window->set_active(false);
+}
+
+void
+ElementText::push_back(display::TextElement* entry) {
+  m_window->push_back(entry);
+
+  // For the moment, don't bother doing anything if the window is
+  // already active.
+  m_window->mark_dirty();
+}
+
+void
+ElementText::push_column(display::TextElement* entry1, display::TextElement* entry2) {
+  m_columnWidth = std::max(entry1->max_length(), m_column);
+
+  display::TextElementList* list = new display::TextElementList;
+  list->set_column(m_column);
+  list->set_column_width(&m_columnWidth);
+
+  list->push_back(entry1);
+  list->push_back(entry2);
+
+  push_back(list);
+}
+
+}

src/utils/variable_generic.cc

@@ -162,11 +162,17 @@ VariableVoidSlot::get() {
 
 void
 VariableVoidSlot::set(const torrent::Object& arg) {
+  if (!m_slotSet.is_valid())
+    return;
+
   m_slotSet();
 }
 
 const torrent::Object&
 VariableValueSlot::get() {
+  if (!m_slotGet.is_valid())
+    return m_cache;
+
   m_cache = m_slotGet() / m_unit;
 
   return m_cache;
@@ -174,6 +180,9 @@ VariableValueSlot::get() {
 
 void
 VariableValueSlot::set(const torrent::Object& arg) {
+  if (!m_slotSet.is_valid())
+    return;
+
   value_type value;
 
   switch (arg.type()) {
@@ -196,6 +205,9 @@ VariableValueSlot::set(const torrent::Object& arg) {
 
 const torrent::Object&
 VariableStringSlot::get() {
+  if (!m_slotGet.is_valid())
+    return m_cache;
+
   m_cache = m_slotGet();
 
   return m_cache;
@@ -203,6 +215,9 @@ VariableStringSlot::get() {
 
 void
 VariableStringSlot::set(const torrent::Object& arg) {
+  if (!m_slotSet.is_valid())
+    return;
+
   switch (arg.type()) {
   case torrent::Object::TYPE_STRING:
     m_slotSet(arg.as_string());

src/utils/variable_generic.h

@@ -167,6 +167,12 @@ public:
     m_slotSet.set(rak::convert_fn<void, const string_type&>(slotSet));
   }
 
+  template <typename SlotGet>
+  VariableStringSlot(SlotGet* slotGet, void* slotSet) {
+    m_slotGet.set(rak::convert_fn<string_type>(slotGet));
+    m_slotSet.set(NULL);
+  }
+
   virtual const torrent::Object& get();
   virtual void                   set(const torrent::Object& arg);