Add availability column

Closes #1632.

src/gui/transferlistdelegate.cpp

@@ -192,6 +192,18 @@ void TransferListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &
             QItemDelegate::drawDisplay(painter, opt, option.rect, elapsedString);
         }
         break;
+
+    case TransferListModel::TR_AVAILABILITY: {
+            const qreal availability = index.data().toReal();
+            if (hideValues && (availability <= 0))
+                break;
+
+            const QString availabilityStr = Utils::String::fromDouble(availability, 3);
+            opt.displayAlignment = (Qt::AlignRight | Qt::AlignVCenter);
+            QItemDelegate::drawDisplay(painter, opt, option.rect, availabilityStr);
+        }
+        break;
+
     default:
         QItemDelegate::paint(painter, option, index);
     }

src/gui/transferlistmodel.cpp

@@ -124,8 +124,8 @@ QVariant TransferListModel::headerData(int section, Qt::Orientation orientation,
             case TR_SEEN_COMPLETE_DATE: return tr("Last Seen Complete", "Indicates the time when the torrent was last seen complete/whole");
             case TR_LAST_ACTIVITY: return tr("Last Activity", "Time passed since a chunk was downloaded/uploaded");
             case TR_TOTAL_SIZE: return tr("Total Size", "i.e. Size including unwanted data");
-            default:
-                return {};
+            case TR_AVAILABILITY: return tr("Availability", "The number of distributed copies of the torrent");
+            default: return {};
             }
         }
         else if (role == Qt::TextAlignmentRole) {
@@ -149,6 +149,7 @@ QVariant TransferListModel::headerData(int section, Qt::Orientation orientation,
             case TR_RATIO:
             case TR_QUEUE_POSITION:
             case TR_LAST_ACTIVITY:
+            case TR_AVAILABILITY:
                 return QVariant(Qt::AlignRight | Qt::AlignVCenter);
             default:
                 return QAbstractListModel::headerData(section, orientation, role);
@@ -239,6 +240,8 @@ QVariant TransferListModel::data(const QModelIndex &index, int role) const
         if (torrent->isPaused() || torrent->isChecking())
             return -1;
         return torrent->timeSinceActivity();
+    case TR_AVAILABILITY:
+        return torrent->distributedCopies();
     case TR_TOTAL_SIZE:
         return torrent->totalSize();
     }

src/gui/transferlistmodel.h

@@ -77,6 +77,7 @@ public:
         TR_RATIO_LIMIT,
         TR_SEEN_COMPLETE_DATE,
         TR_LAST_ACTIVITY,
+        TR_AVAILABILITY,
 
         NB_COLUMNS
     };

src/webui/api/serialize/serialize_torrent.cpp

@@ -125,6 +125,7 @@ QVariantMap serialize(const BitTorrent::TorrentHandle &torrent)
     ret[KEY_TORRENT_LAST_SEEN_COMPLETE_TIME] = torrent.lastSeenComplete().toTime_t();
     ret[KEY_TORRENT_AUTO_TORRENT_MANAGEMENT] = torrent.isAutoTMMEnabled();
     ret[KEY_TORRENT_TIME_ACTIVE] = torrent.activeTime();
+    ret[KEY_TORRENT_AVAILABILITY] = torrent.distributedCopies();
 
     if (torrent.isPaused() || torrent.isChecking()) {
         ret[KEY_TORRENT_LAST_ACTIVITY_TIME] = 0;

src/webui/api/serialize/serialize_torrent.h

@@ -78,5 +78,6 @@ const char KEY_TORRENT_LAST_ACTIVITY_TIME[] = "last_activity";
 const char KEY_TORRENT_TOTAL_SIZE[] = "total_size";
 const char KEY_TORRENT_AUTO_TORRENT_MANAGEMENT[] = "auto_tmm";
 const char KEY_TORRENT_TIME_ACTIVE[] = "time_active";
+const char KEY_TORRENT_AVAILABILITY[] = "availability";
 
 QVariantMap serialize(const BitTorrent::TorrentHandle &torrent);

src/webui/www/private/scripts/dynamicTable.js

@@ -828,12 +828,12 @@ const TorrentsTable = new Class({
         this.newColumn('max_ratio', '', 'QBT_TR(Ratio Limit)QBT_TR[CONTEXT=TransferListModel]', 100, false);
         this.newColumn('seen_complete', '', 'QBT_TR(Last Seen Complete)QBT_TR[CONTEXT=TransferListModel]', 100, false);
         this.newColumn('last_activity', '', 'QBT_TR(Last Activity)QBT_TR[CONTEXT=TransferListModel]', 100, false);
+        this.newColumn('availability', '', 'QBT_TR(Availability)QBT_TR[CONTEXT=TransferListModel]', 100, false);
 
         this.columns['state_icon'].onclick = '';
         this.columns['state_icon'].dataProperties[0] = 'state';
 
         this.columns['num_seeds'].dataProperties.push('num_complete');
-
         this.columns['num_leechs'].dataProperties.push('num_incomplete');
 
         this.initColumnsFunctions();
@@ -1181,6 +1181,13 @@ const TorrentsTable = new Class({
             td.set('html', time);
             td.set('title', time);
         };
+
+        // availability
+        this.columns['availability'].updateTd = function(td, row) {
+            const value = (Math.floor(1000 * this.getRowValue(row)) / 1000).toFixed(3);  // Don't round up
+            td.set('html', value);
+            td.set('title', value);
+        };
     },
 
     applyFilter: function(row, filterName, categoryHash, tagHash, filterTerms) {