Initial implementation of a game list

1 files changed, 154 insertions, 0 deletions

diff --git a/src/citra_qt/game_list.cpp b/src/citra_qt/game_list.cpp
new file mode 100644
index 000000000..f90e05374
--- /dev/null
+++ b/src/citra_qt/game_list.cpp
@@ -0,0 +1,154 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QHeaderView>
+#include <QThreadPool>
+#include <QVBoxLayout>
+
+#include "game_list.h"
+#include "game_list_p.h"
+
+#include "core/loader/loader.h"
+
+#include "common/common_paths.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+
+GameList::GameList(QWidget* parent)
+{
+    QVBoxLayout* layout = new QVBoxLayout;
+
+    tree_view = new QTreeView;
+    item_model = new QStandardItemModel(tree_view);
+    tree_view->setModel(item_model);
+
+    tree_view->setAlternatingRowColors(true);
+    tree_view->setSelectionMode(QHeaderView::SingleSelection);
+    tree_view->setSelectionBehavior(QHeaderView::SelectRows);
+    tree_view->setVerticalScrollMode(QHeaderView::ScrollPerPixel);
+    tree_view->setHorizontalScrollMode(QHeaderView::ScrollPerPixel);
+    tree_view->setSortingEnabled(true);
+    tree_view->setEditTriggers(QHeaderView::NoEditTriggers);
+    tree_view->setUniformRowHeights(true);
+
+    item_model->insertColumns(0, COLUMN_COUNT);
+    item_model->setHeaderData(COLUMN_FILE_TYPE, Qt::Horizontal, "File type");
+    item_model->setHeaderData(COLUMN_NAME, Qt::Horizontal, "Name");
+    item_model->setHeaderData(COLUMN_SIZE, Qt::Horizontal, "Size");
+
+    connect(tree_view, SIGNAL(activated(const QModelIndex&)), this, SLOT(ValidateEntry(const QModelIndex&)));
+
+    // We must register all custom types with the Qt Automoc system so that we are able to use it with
+    // signals/slots. In this case, QList falls under the umbrells of custom types.
+    qRegisterMetaType<QList<QStandardItem*>>("QList<QStandardItem*>");
+
+    layout->addWidget(tree_view);
+    setLayout(layout);
+}
+
+GameList::~GameList()
+{
+    emit ShouldCancelWorker();
+}
+
+void GameList::AddEntry(QList<QStandardItem*> entry_items)
+{
+    item_model->invisibleRootItem()->appendRow(entry_items);
+}
+
+void GameList::ValidateEntry(const QModelIndex& item)
+{
+    // We don't care about the individual QStandardItem that was selected, but its row.
+    int row = item_model->itemFromIndex(item)->row();
+    QStandardItem* child_file = item_model->invisibleRootItem()->child(row, COLUMN_NAME);
+    QString file_path = child_file->data(GameListItemPath::FullPathRole).toString();
+
+    if (file_path.isEmpty())
+        return;
+    std::string std_file_path = file_path.toStdString();
+    if (!FileUtil::Exists(std_file_path) || FileUtil::IsDirectory(std_file_path))
+        return;
+    emit GameChosen(file_path);
+}
+
+void GameList::DonePopulating()
+{
+    tree_view->setEnabled(true);
+}
+
+void GameList::PopulateAsync(const QString& dir_path, bool deep_scan)
+{
+    if (!FileUtil::Exists(dir_path.toStdString()) || !FileUtil::IsDirectory(dir_path.toStdString())) {
+        LOG_ERROR(Frontend, "Could not find game list folder at %s", dir_path.toLatin1().data());
+        return;
+    }
+
+    tree_view->setEnabled(false);
+    // Delete any rows that might already exist if we're repopulating
+    item_model->removeRows(0, item_model->rowCount());
+
+    emit ShouldCancelWorker();
+    GameListWorker* worker = new GameListWorker(dir_path, deep_scan);
+
+    connect(worker, SIGNAL(EntryReady(QList<QStandardItem*>)), this, SLOT(AddEntry(QList<QStandardItem*>)), Qt::QueuedConnection);
+    connect(worker, SIGNAL(Finished()), this, SLOT(DonePopulating()), Qt::QueuedConnection);
+    // Use DirectConnection here because worker->Cancel() is thread-safe and we want it to cancel without delay.
+    connect(this, SIGNAL(ShouldCancelWorker()), worker, SLOT(Cancel()), Qt::DirectConnection);
+
+    QThreadPool::globalInstance()->start(worker);
+    current_worker = std::move(worker);
+}
+
+void GameListWorker::AddFstEntriesToGameList(const std::string& dir_path, bool deep_scan)
+{
+    const auto callback = [&](const std::string& directory,
+                                     const std::string& virtual_name) -> int {
+
+        std::string physical_name = directory + DIR_SEP + virtual_name;
+
+        if (stop_processing)
+            return -1; // A negative return value breaks the callback loop.
+
+        if (deep_scan && FileUtil::IsDirectory(physical_name)) {
+            AddFstEntriesToGameList(physical_name, true);
+        } else {
+            std::string filename_filename, filename_extension;
+            Common::SplitPath(physical_name, nullptr, &filename_filename, &filename_extension);
+
+            Loader::FileType guessed_filetype = Loader::GuessFromExtension(filename_extension);
+            if (guessed_filetype == Loader::FileType::Unknown)
+                return 0;
+            Loader::FileType filetype = Loader::IdentifyFile(physical_name);
+            if (filetype == Loader::FileType::Unknown) {
+                LOG_WARNING(Frontend, "File %s is of indeterminate type and is possibly corrupted.", physical_name.c_str());
+                return 0;
+            }
+            if (guessed_filetype != filetype) {
+                LOG_WARNING(Frontend, "Filetype and extension of file %s do not match.", physical_name.c_str());
+            }
+
+            emit EntryReady({
+                new GameListItem(QString::fromStdString(Loader::GetFileTypeString(filetype))),
+                new GameListItemPath(QString::fromStdString(physical_name)),
+                new GameListItemSize(FileUtil::GetSize(physical_name)),
+            });
+        }
+
+        return 0; // We don't care about the found entries
+    };
+    FileUtil::ScanDirectoryTreeAndCallback(dir_path, callback);
+}
+
+void GameListWorker::run()
+{
+    stop_processing = false;
+    AddFstEntriesToGameList(dir_path.toStdString(), deep_scan);
+    emit Finished();
+}
+
+void GameListWorker::Cancel()
+{
+    disconnect(this, 0, 0, 0);
+    stop_processing = true;
+}