Add smart playlists, ratings and Qobuz

Fixes #259
Fixes #264

src/smartplaylists/smartplaylistsearchpreview.cpp

@@ -0,0 +1,151 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ *
+ * Strawberry 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <memory>
+
+#include <QWidget>
+#include <QAbstractItemView>
+#include <QString>
+#include <QtConcurrentRun>
+
+#include "smartplaylistsearchpreview.h"
+#include "ui_smartplaylistsearchpreview.h"
+
+#include "core/closure.h"
+#include "playlist/playlist.h"
+#include "playlistquerygenerator.h"
+
+SmartPlaylistSearchPreview::SmartPlaylistSearchPreview(QWidget* parent)
+    : QWidget(parent),
+    ui_(new Ui_SmartPlaylistSearchPreview),
+    model_(nullptr) {
+
+  ui_->setupUi(this);
+
+  // Prevent editing songs and saving settings (like header columns and geometry)
+  ui_->tree->setEditTriggers(QAbstractItemView::NoEditTriggers);
+  ui_->tree->SetReadOnlySettings(true);
+
+  QFont bold_font;
+  bold_font.setBold(true);
+  ui_->preview_label->setFont(bold_font);
+  ui_->busy_container->hide();
+
+}
+
+SmartPlaylistSearchPreview::~SmartPlaylistSearchPreview() {
+  delete ui_;
+}
+
+void SmartPlaylistSearchPreview::set_application(Application *app) {
+
+  ui_->tree->Init(app);
+
+}
+
+void SmartPlaylistSearchPreview::set_collection(CollectionBackend *backend) {
+
+  backend_ = backend;
+
+  model_ = new Playlist(nullptr, nullptr, backend_, -1, QString(), false, this);
+  ui_->tree->setModel(model_);
+  ui_->tree->SetPlaylist(model_);
+  ui_->tree->SetItemDelegates();
+
+}
+
+void SmartPlaylistSearchPreview::Update(const SmartPlaylistSearch &search) {
+
+  if (search == last_search_) {
+    // This search was the same as the last one we did
+    return;
+  }
+
+  if (generator_ || isHidden()) {
+    // It's busy generating something already, or the widget isn't visible
+    pending_search_ = search;
+    return;
+  }
+
+  RunSearch(search);
+
+}
+
+void SmartPlaylistSearchPreview::showEvent(QShowEvent *e) {
+
+  if (pending_search_.is_valid() && !generator_) {
+    // There was a search waiting while we were hidden, so run it now
+    RunSearch(pending_search_);
+    pending_search_ = SmartPlaylistSearch();
+  }
+
+  QWidget::showEvent(e);
+
+}
+
+namespace {
+PlaylistItemList DoRunSearch(PlaylistGeneratorPtr gen) { return gen->Generate(); }
+}  // namespace
+
+void SmartPlaylistSearchPreview::RunSearch(const SmartPlaylistSearch &search) {
+
+  generator_.reset(new PlaylistQueryGenerator);
+  generator_->set_collection(backend_);
+  std::dynamic_pointer_cast<PlaylistQueryGenerator>(generator_)->Load(search);
+
+  ui_->busy_container->show();
+  ui_->count_label->hide();
+  QFuture<PlaylistItemList> future = QtConcurrent::run(DoRunSearch, generator_);
+  NewClosure(future, this, SLOT(SearchFinished(QFuture<PlaylistItemList>)), future);
+
+}
+
+void SmartPlaylistSearchPreview::SearchFinished(QFuture<PlaylistItemList> future) {
+
+  last_search_ = std::dynamic_pointer_cast<PlaylistQueryGenerator>(generator_)->search();
+  generator_.reset();
+
+  if (pending_search_.is_valid() && pending_search_ != last_search_) {
+    // There was another search done while we were running
+    // throw away these results and do that one now instead
+    RunSearch(pending_search_);
+    pending_search_ = SmartPlaylistSearch();
+    return;
+  }
+
+  PlaylistItemList all_items = future.result();
+  PlaylistItemList displayed_items = all_items.mid(0, PlaylistGenerator::kDefaultLimit);
+
+  model_->Clear();
+  model_->InsertItems(displayed_items);
+
+  if (displayed_items.count() < all_items.count()) {
+    ui_->count_label->setText(tr("%1 songs found (showing %2)").arg(all_items.count()).arg(displayed_items.count()));
+  }
+  else {
+    ui_->count_label->setText(tr("%1 songs found").arg(all_items.count()));
+  }
+
+  ui_->busy_container->hide();
+  ui_->count_label->show();
+
+}