340 lines
15 KiB
C++
340 lines
15 KiB
C++
#pragma once
|
|
|
|
#include <QAbstractListModel>
|
|
#include <QDir>
|
|
#include <QFileSystemWatcher>
|
|
#include <QMutex>
|
|
#include <QSet>
|
|
#include <QSortFilterProxyModel>
|
|
|
|
#include "Resource.h"
|
|
|
|
#include "BaseInstance.h"
|
|
|
|
#include "tasks/Task.h"
|
|
#include "tasks/ConcurrentTask.h"
|
|
|
|
class QSortFilterProxyModel;
|
|
|
|
/** A basic model for external resources.
|
|
*
|
|
* This model manages a list of resources. As such, external users of such resources do not own them,
|
|
* and the resource's lifetime is contingent on the model's lifetime.
|
|
*
|
|
* TODO: Make the resources unique pointers accessible through weak pointers.
|
|
*/
|
|
class ResourceFolderModel : public QAbstractListModel {
|
|
Q_OBJECT
|
|
public:
|
|
ResourceFolderModel(QDir, std::shared_ptr<const BaseInstance>, QObject* parent = nullptr, bool create_dir = true);
|
|
~ResourceFolderModel() override;
|
|
|
|
/** Starts watching the paths for changes.
|
|
*
|
|
* Returns whether starting to watch all the paths was successful.
|
|
* If one or more fails, it returns false.
|
|
*/
|
|
bool startWatching(const QStringList paths);
|
|
|
|
/** Stops watching the paths for changes.
|
|
*
|
|
* Returns whether stopping to watch all the paths was successful.
|
|
* If one or more fails, it returns false.
|
|
*/
|
|
bool stopWatching(const QStringList paths);
|
|
|
|
/* Helper methods for subclasses, using a predetermined list of paths. */
|
|
virtual bool startWatching() { return startWatching({ m_dir.absolutePath() }); };
|
|
virtual bool stopWatching() { return stopWatching({ m_dir.absolutePath() }); };
|
|
|
|
/** Given a path in the system, install that resource, moving it to its place in the
|
|
* instance file hierarchy.
|
|
*
|
|
* Returns whether the installation was succcessful.
|
|
*/
|
|
virtual bool installResource(QString path);
|
|
|
|
/** Uninstall (i.e. remove all data about it) a resource, given its file name.
|
|
*
|
|
* Returns whether the removal was successful.
|
|
*/
|
|
virtual bool uninstallResource(QString file_name);
|
|
virtual bool deleteResources(const QModelIndexList&);
|
|
|
|
/** Applies the given 'action' to the resources in 'indexes'.
|
|
*
|
|
* Returns whether the action was successfully applied to all resources.
|
|
*/
|
|
virtual bool setResourceEnabled(const QModelIndexList& indexes, EnableAction action);
|
|
|
|
/** Creates a new update task and start it. Returns false if no update was done, like when an update is already underway. */
|
|
virtual bool update();
|
|
|
|
/** Creates a new parse task, if needed, for 'res' and start it.*/
|
|
virtual void resolveResource(Resource* res);
|
|
|
|
[[nodiscard]] size_t size() const { return m_resources.size(); };
|
|
[[nodiscard]] bool empty() const { return size() == 0; }
|
|
[[nodiscard]] Resource& at(int index) { return *m_resources.at(index); }
|
|
[[nodiscard]] Resource const& at(int index) const { return *m_resources.at(index); }
|
|
[[nodiscard]] QList<Resource::Ptr> const& all() const { return m_resources; }
|
|
|
|
[[nodiscard]] QDir const& dir() const { return m_dir; }
|
|
|
|
/** Checks whether there's any parse tasks being done.
|
|
*
|
|
* Since they can be quite expensive, and are usually done in a separate thread, if we were to destroy the model while having
|
|
* such tasks would introduce an undefined behavior, most likely resulting in a crash.
|
|
*/
|
|
[[nodiscard]] bool hasPendingParseTasks() const;
|
|
|
|
/* Qt behavior */
|
|
|
|
/* Basic columns */
|
|
enum Columns { ACTIVE_COLUMN = 0, NAME_COLUMN, DATE_COLUMN, NUM_COLUMNS };
|
|
|
|
[[nodiscard]] int rowCount(const QModelIndex& parent = {}) const override { return parent.isValid() ? 0 : static_cast<int>(size()); }
|
|
[[nodiscard]] int columnCount(const QModelIndex& parent = {}) const override { return parent.isValid() ? 0 : NUM_COLUMNS; };
|
|
|
|
[[nodiscard]] Qt::DropActions supportedDropActions() const override;
|
|
|
|
/// flags, mostly to support drag&drop
|
|
[[nodiscard]] Qt::ItemFlags flags(const QModelIndex& index) const override;
|
|
[[nodiscard]] QStringList mimeTypes() const override;
|
|
bool dropMimeData(const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent) override;
|
|
|
|
[[nodiscard]] bool validateIndex(const QModelIndex& index) const;
|
|
|
|
[[nodiscard]] QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
|
|
bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole) override;
|
|
|
|
[[nodiscard]] QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
|
|
|
|
/** This creates a proxy model to filter / sort the model for a UI.
|
|
*
|
|
* The actual comparisons and filtering are done directly by the Resource, so to modify behavior go there instead!
|
|
*/
|
|
QSortFilterProxyModel* createFilterProxyModel(QObject* parent = nullptr);
|
|
|
|
[[nodiscard]] SortType columnToSortKey(size_t column) const;
|
|
|
|
class ProxyModel : public QSortFilterProxyModel {
|
|
public:
|
|
explicit ProxyModel(QObject* parent = nullptr) : QSortFilterProxyModel(parent) {}
|
|
|
|
protected:
|
|
[[nodiscard]] bool filterAcceptsRow(int source_row, const QModelIndex& source_parent) const override;
|
|
[[nodiscard]] bool lessThan(const QModelIndex& source_left, const QModelIndex& source_right) const override;
|
|
};
|
|
|
|
QString instDirPath() const;
|
|
|
|
public slots:
|
|
void enableInteraction(bool enabled);
|
|
void disableInteraction(bool disabled) { enableInteraction(!disabled); }
|
|
|
|
signals:
|
|
void updateFinished();
|
|
|
|
protected:
|
|
/** This creates a new update task to be executed by update().
|
|
*
|
|
* The task should load and parse all resources necessary, and provide a way of accessing such results.
|
|
*
|
|
* This Task is normally executed when opening a page, so it shouldn't contain much heavy work.
|
|
* If such work is needed, try using it in the Task create by createParseTask() instead!
|
|
*/
|
|
[[nodiscard]] virtual Task* createUpdateTask();
|
|
|
|
/** This creates a new parse task to be executed by onUpdateSucceeded().
|
|
*
|
|
* This task should load and parse all heavy info needed by a resource, such as parsing a manifest. It gets executed
|
|
* in the background, so it slowly updates the UI as tasks get done.
|
|
*/
|
|
[[nodiscard]] virtual Task* createParseTask(Resource&) { return nullptr; };
|
|
|
|
/** Standard implementation of the model update logic.
|
|
*
|
|
* It uses set operations to find differences between the current state and the updated state,
|
|
* to act only on those disparities.
|
|
*
|
|
* The implementation is at the end of this header.
|
|
*/
|
|
template <typename T>
|
|
void applyUpdates(QSet<QString>& current_set, QSet<QString>& new_set, QMap<QString, T>& new_resources);
|
|
|
|
protected slots:
|
|
void directoryChanged(QString);
|
|
|
|
/** Called when the update task is successful.
|
|
*
|
|
* This usually calls static_cast on the specific Task type returned by createUpdateTask,
|
|
* so care must be taken in such cases.
|
|
* TODO: Figure out a way to express this relationship better without templated classes (Q_OBJECT macro disallows that).
|
|
*/
|
|
virtual void onUpdateSucceeded();
|
|
virtual void onUpdateFailed() {}
|
|
|
|
/** Called when the parse task with the given ticket is successful.
|
|
*
|
|
* This is just a simple reference implementation. You probably want to override it with your own logic in a subclass
|
|
* if the resource is complex and has more stuff to parse.
|
|
*/
|
|
virtual void onParseSucceeded(int ticket, QString resource_id);
|
|
virtual void onParseFailed(int ticket, QString resource_id) { Q_UNUSED(ticket); Q_UNUSED(resource_id); }
|
|
|
|
protected:
|
|
// Represents the relationship between a column's index (represented by the list index), and it's sorting key.
|
|
// As such, the order in with they appear is very important!
|
|
QList<SortType> m_column_sort_keys = { SortType::ENABLED, SortType::NAME, SortType::DATE };
|
|
|
|
bool m_can_interact = true;
|
|
|
|
QDir m_dir;
|
|
std::shared_ptr<const BaseInstance> m_instance;
|
|
QFileSystemWatcher m_watcher;
|
|
bool m_is_watching = false;
|
|
|
|
Task::Ptr m_current_update_task = nullptr;
|
|
bool m_scheduled_update = false;
|
|
|
|
QList<Resource::Ptr> m_resources;
|
|
|
|
// Represents the relationship between a resource's internal ID and it's row position on the model.
|
|
QMap<QString, int> m_resources_index;
|
|
|
|
ConcurrentTask m_helper_thread_task;
|
|
QMap<int, Task::Ptr> m_active_parse_tasks;
|
|
std::atomic<int> m_next_resolution_ticket = 0;
|
|
};
|
|
|
|
/* A macro to define useful functions to handle Resource* -> T* more easily on derived classes */
|
|
#define RESOURCE_HELPERS(T) \
|
|
[[nodiscard]] T* operator[](size_t index) \
|
|
{ \
|
|
return static_cast<T*>(m_resources[index].get()); \
|
|
} \
|
|
[[nodiscard]] T* at(size_t index) \
|
|
{ \
|
|
return static_cast<T*>(m_resources[index].get()); \
|
|
} \
|
|
[[nodiscard]] const T* at(size_t index) const \
|
|
{ \
|
|
return static_cast<const T*>(m_resources.at(index).get()); \
|
|
} \
|
|
[[nodiscard]] T* first() \
|
|
{ \
|
|
return static_cast<T*>(m_resources.first().get()); \
|
|
} \
|
|
[[nodiscard]] T* last() \
|
|
{ \
|
|
return static_cast<T*>(m_resources.last().get()); \
|
|
} \
|
|
[[nodiscard]] T* find(QString id) \
|
|
{ \
|
|
auto iter = std::find_if(m_resources.constBegin(), m_resources.constEnd(), \
|
|
[&](Resource::Ptr const& r) { return r->internal_id() == id; }); \
|
|
if (iter == m_resources.constEnd()) \
|
|
return nullptr; \
|
|
return static_cast<T*>((*iter).get()); \
|
|
}
|
|
|
|
/* Template definition to avoid some code duplication */
|
|
template <typename T>
|
|
void ResourceFolderModel::applyUpdates(QSet<QString>& current_set, QSet<QString>& new_set, QMap<QString, T>& new_resources)
|
|
{
|
|
// see if the kept resources changed in some way
|
|
{
|
|
QSet<QString> kept_set = current_set;
|
|
kept_set.intersect(new_set);
|
|
|
|
for (auto const& kept : kept_set) {
|
|
auto row_it = m_resources_index.constFind(kept);
|
|
Q_ASSERT(row_it != m_resources_index.constEnd());
|
|
auto row = row_it.value();
|
|
|
|
auto& new_resource = new_resources[kept];
|
|
auto const& current_resource = m_resources.at(row);
|
|
|
|
if (new_resource->dateTimeChanged() == current_resource->dateTimeChanged()) {
|
|
// no significant change, ignore...
|
|
continue;
|
|
}
|
|
|
|
// If the resource is resolving, but something about it changed, we don't want to
|
|
// continue the resolving.
|
|
if (current_resource->isResolving()) {
|
|
auto ticket = current_resource->resolutionTicket();
|
|
if (m_active_parse_tasks.contains(ticket)) {
|
|
auto task = (*m_active_parse_tasks.find(ticket)).get();
|
|
task->abort();
|
|
}
|
|
}
|
|
|
|
m_resources[row].reset(new_resource);
|
|
resolveResource(m_resources.at(row).get());
|
|
emit dataChanged(index(row, 0), index(row, columnCount(QModelIndex()) - 1));
|
|
}
|
|
}
|
|
|
|
// remove resources no longer present
|
|
{
|
|
QSet<QString> removed_set = current_set;
|
|
removed_set.subtract(new_set);
|
|
|
|
QList<int> removed_rows;
|
|
for (auto& removed : removed_set)
|
|
removed_rows.append(m_resources_index[removed]);
|
|
|
|
std::sort(removed_rows.begin(), removed_rows.end(), std::greater<int>());
|
|
|
|
for (auto& removed_index : removed_rows) {
|
|
auto removed_it = m_resources.begin() + removed_index;
|
|
|
|
Q_ASSERT(removed_it != m_resources.end());
|
|
Q_ASSERT(removed_set.contains(removed_it->get()->internal_id()));
|
|
|
|
if ((*removed_it)->isResolving()) {
|
|
auto ticket = (*removed_it)->resolutionTicket();
|
|
if (m_active_parse_tasks.contains(ticket)) {
|
|
auto task = (*m_active_parse_tasks.find(ticket)).get();
|
|
task->abort();
|
|
}
|
|
}
|
|
|
|
beginRemoveRows(QModelIndex(), removed_index, removed_index);
|
|
m_resources.erase(removed_it);
|
|
endRemoveRows();
|
|
}
|
|
}
|
|
|
|
// add new resources to the end
|
|
{
|
|
QSet<QString> added_set = new_set;
|
|
added_set.subtract(current_set);
|
|
|
|
// When you have a Qt build with assertions turned on, proceeding here will abort the application
|
|
if (added_set.size() > 0) {
|
|
beginInsertRows(QModelIndex(), m_resources.size(), m_resources.size() + added_set.size() - 1);
|
|
|
|
for (auto& added : added_set) {
|
|
auto res = new_resources[added];
|
|
m_resources.append(res);
|
|
resolveResource(m_resources.last().get());
|
|
}
|
|
|
|
endInsertRows();
|
|
}
|
|
}
|
|
|
|
// update index
|
|
{
|
|
m_resources_index.clear();
|
|
int idx = 0;
|
|
for (auto const& mod : qAsConst(m_resources)) {
|
|
m_resources_index[mod->internal_id()] = idx;
|
|
idx++;
|
|
}
|
|
}
|
|
}
|