pollymc/application/dialogs/ExportInstanceDialog.cpp

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/* Copyright 2013-2015 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ExportInstanceDialog.h"
#include "ui_ExportInstanceDialog.h"
#include <BaseInstance.h>
#include <MMCZip.h>
#include <QFileDialog>
#include <QMessageBox>
#include <qfilesystemmodel.h>
#include <QSortFilterProxyModel>
#include <QDebug>
#include <qstack.h>
#include <QSaveFile>
#include "MMCStrings.h"
#include "SeparatorPrefixTree.h"
#include "MultiMC.h"
#include <icons/IconList.h>
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#include <FileSystem.h>
class PackIgnoreProxy : public QSortFilterProxyModel
{
Q_OBJECT
public:
PackIgnoreProxy(InstancePtr instance, QObject *parent) : QSortFilterProxyModel(parent)
{
m_instance = instance;
}
// NOTE: Sadly, we have to do sorting ourselves.
bool lessThan(const QModelIndex &left, const QModelIndex &right) const
{
QFileSystemModel *fsm = qobject_cast<QFileSystemModel *>(sourceModel());
if (!fsm)
{
return QSortFilterProxyModel::lessThan(left, right);
}
bool asc = sortOrder() == Qt::AscendingOrder ? true : false;
QFileInfo leftFileInfo = fsm->fileInfo(left);
QFileInfo rightFileInfo = fsm->fileInfo(right);
if (!leftFileInfo.isDir() && rightFileInfo.isDir())
{
return !asc;
}
if (leftFileInfo.isDir() && !rightFileInfo.isDir())
{
return asc;
}
// sort and proxy model breaks the original model...
if (sortColumn() == 0)
{
return Strings::naturalCompare(leftFileInfo.fileName(), rightFileInfo.fileName(),
Qt::CaseInsensitive) < 0;
}
if (sortColumn() == 1)
{
auto leftSize = leftFileInfo.size();
auto rightSize = rightFileInfo.size();
if ((leftSize == rightSize) || (leftFileInfo.isDir() && rightFileInfo.isDir()))
{
return Strings::naturalCompare(leftFileInfo.fileName(),
rightFileInfo.fileName(),
Qt::CaseInsensitive) < 0
? asc
: !asc;
}
return leftSize < rightSize;
}
return QSortFilterProxyModel::lessThan(left, right);
}
virtual Qt::ItemFlags flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::NoItemFlags;
auto sourceIndex = mapToSource(index);
Qt::ItemFlags flags = sourceIndex.flags();
if (index.column() == 0)
{
flags |= Qt::ItemIsUserCheckable;
if (sourceIndex.model()->hasChildren(sourceIndex))
{
flags |= Qt::ItemIsTristate;
}
}
return flags;
}
virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const
{
QModelIndex sourceIndex = mapToSource(index);
if (index.column() == 0 && role == Qt::CheckStateRole)
{
QFileSystemModel *fsm = qobject_cast<QFileSystemModel *>(sourceModel());
auto blockedPath = relPath(fsm->filePath(sourceIndex));
auto cover = blocked.cover(blockedPath);
if (!cover.isNull())
{
return QVariant(Qt::Unchecked);
}
else if (blocked.exists(blockedPath))
{
return QVariant(Qt::PartiallyChecked);
}
else
{
return QVariant(Qt::Checked);
}
}
return sourceIndex.data(role);
}
virtual bool setData(const QModelIndex &index, const QVariant &value,
int role = Qt::EditRole)
{
if (index.column() == 0 && role == Qt::CheckStateRole)
{
Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
return setFilterState(index, state);
}
QModelIndex sourceIndex = mapToSource(index);
return QSortFilterProxyModel::sourceModel()->setData(sourceIndex, value, role);
}
QString relPath(const QString &path) const
{
QString prefix = QDir().absoluteFilePath(m_instance->instanceRoot());
prefix += '/';
if (!path.startsWith(prefix))
{
return QString();
}
return path.mid(prefix.size());
}
bool setFilterState(QModelIndex index, Qt::CheckState state)
{
QFileSystemModel *fsm = qobject_cast<QFileSystemModel *>(sourceModel());
if (!fsm)
{
return false;
}
QModelIndex sourceIndex = mapToSource(index);
auto blockedPath = relPath(fsm->filePath(sourceIndex));
bool changed = false;
if (state == Qt::Unchecked)
{
// blocking a path
auto &node = blocked.insert(blockedPath);
// get rid of all blocked nodes below
node.clear();
changed = true;
}
else if (state == Qt::Checked || state == Qt::PartiallyChecked)
{
if (!blocked.remove(blockedPath))
{
auto cover = blocked.cover(blockedPath);
qDebug() << "Blocked by cover" << cover;
// uncover
blocked.remove(cover);
// block all contents, except for any cover
QModelIndex rootIndex =
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fsm->index(FS::PathCombine(m_instance->instanceRoot(), cover));
QModelIndex doing = rootIndex;
int row = 0;
QStack<QModelIndex> todo;
while (1)
{
auto node = doing.child(row, 0);
if (!node.isValid())
{
if (!todo.size())
{
break;
}
else
{
doing = todo.pop();
row = 0;
continue;
}
}
auto relpath = relPath(fsm->filePath(node));
if (blockedPath.startsWith(relpath)) // cover found?
{
// continue processing cover later
todo.push(node);
}
else
{
// or just block this one.
blocked.insert(relpath);
}
row++;
}
}
changed = true;
}
if (changed)
{
// update the thing
emit dataChanged(index, index, {Qt::CheckStateRole});
// update everything above index
QModelIndex up = index.parent();
while (1)
{
if (!up.isValid())
break;
emit dataChanged(up, up, {Qt::CheckStateRole});
up = up.parent();
}
// and everything below the index
QModelIndex doing = index;
int row = 0;
QStack<QModelIndex> todo;
while (1)
{
auto node = doing.child(row, 0);
if (!node.isValid())
{
if (!todo.size())
{
break;
}
else
{
doing = todo.pop();
row = 0;
continue;
}
}
emit dataChanged(node, node, {Qt::CheckStateRole});
todo.push(node);
row++;
}
// siblings and unrelated nodes are ignored
}
return true;
}
bool shouldExpand(QModelIndex index)
{
QModelIndex sourceIndex = mapToSource(index);
QFileSystemModel *fsm = qobject_cast<QFileSystemModel *>(sourceModel());
if (!fsm)
{
return false;
}
auto blockedPath = relPath(fsm->filePath(sourceIndex));
auto found = blocked.find(blockedPath);
if(found)
{
return !found->leaf();
}
return false;
}
void setBlockedPaths(QStringList paths)
{
beginResetModel();
blocked.clear();
blocked.insert(paths);
endResetModel();
}
const SeparatorPrefixTree<'/'> & blockedPaths() const
{
return blocked;
}
protected:
bool filterAcceptsColumn(int source_column, const QModelIndex &source_parent) const
{
Q_UNUSED(source_parent)
// adjust the columns you want to filter out here
// return false for those that will be hidden
if (source_column == 2 || source_column == 3)
return false;
return true;
}
private:
InstancePtr m_instance;
SeparatorPrefixTree<'/'> blocked;
};
ExportInstanceDialog::ExportInstanceDialog(InstancePtr instance, QWidget *parent)
: QDialog(parent), ui(new Ui::ExportInstanceDialog), m_instance(instance)
{
ui->setupUi(this);
auto model = new QFileSystemModel(this);
proxyModel = new PackIgnoreProxy(m_instance, this);
loadPackIgnore();
proxyModel->setSourceModel(model);
auto root = instance->instanceRoot();
ui->treeView->setModel(proxyModel);
ui->treeView->setRootIndex(proxyModel->mapFromSource(model->index(root)));
connect(proxyModel, SIGNAL(rowsInserted(QModelIndex,int,int)), SLOT(rowsInserted(QModelIndex,int,int)));
model->setRootPath(root);
auto headerView = ui->treeView->header();
headerView->setSectionResizeMode(QHeaderView::ResizeToContents);
headerView->setSectionResizeMode(0, QHeaderView::Stretch);
}
ExportInstanceDialog::~ExportInstanceDialog()
{
delete ui;
}
/// Save icon to instance's folder is needed
void SaveIcon(InstancePtr m_instance)
{
auto iconKey = m_instance->iconKey();
auto iconList = MMC->icons();
auto mmcIcon = iconList->icon(iconKey);
if(mmcIcon)
{
bool saveIcon = false;
switch(mmcIcon->type())
{
case IconType::FileBased:
case IconType::Transient:
saveIcon = true;
default:
break;
}
if(saveIcon)
{
auto & image = mmcIcon->m_images[mmcIcon->type()];
auto & icon = image.icon;
auto sizes = icon.availableSizes();
if(sizes.size() == 0)
{
return;
}
auto areaOf = [](QSize size)
{
return size.width() * size.height();
};
QSize largest = sizes[0];
// find variant with largest area
for(auto size: sizes)
{
if(areaOf(largest) < areaOf(size))
{
largest = size;
}
}
auto pixmap = icon.pixmap(largest);
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pixmap.save(FS::PathCombine(m_instance->instanceRoot(), iconKey + ".png"));
}
}
}
bool ExportInstanceDialog::doExport()
{
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auto name = FS::RemoveInvalidFilenameChars(m_instance->name());
const QString output = QFileDialog::getSaveFileName(
this, tr("Export %1").arg(m_instance->name()),
FS::PathCombine(QDir::homePath(), name + ".zip"), "Zip (*.zip)", nullptr, QFileDialog::DontConfirmOverwrite);
if (output.isNull())
{
return false;
}
if (QFile::exists(output))
{
int ret =
QMessageBox::question(this, tr("Overwrite?"),
tr("This file already exists. Do you want to overwrite it?"),
QMessageBox::No, QMessageBox::Yes);
if (ret == QMessageBox::No)
{
return false;
}
}
SaveIcon(m_instance);
if (!MMCZip::compressDir(output, m_instance->instanceRoot(), name, &proxyModel->blockedPaths()))
{
QMessageBox::warning(this, tr("Error"), tr("Unable to export instance"));
return false;
}
return true;
}
void ExportInstanceDialog::done(int result)
{
savePackIgnore();
if (result == QDialog::Accepted)
{
if (doExport())
{
QDialog::done(QDialog::Accepted);
return;
}
else
{
return;
}
}
QDialog::done(result);
}
void ExportInstanceDialog::rowsInserted(QModelIndex parent, int top, int bottom)
{
//WARNING: possible off-by-one?
for(int i = top; i < bottom; i++)
{
auto node = parent.child(i, 0);
if(proxyModel->shouldExpand(node))
{
auto expNode = node.parent();
if(!expNode.isValid())
{
continue;
}
ui->treeView->expand(node);
}
}
}
QString ExportInstanceDialog::ignoreFileName()
{
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return FS::PathCombine(m_instance->instanceRoot(), ".packignore");
}
void ExportInstanceDialog::loadPackIgnore()
{
auto filename = ignoreFileName();
QFile ignoreFile(filename);
if(!ignoreFile.open(QIODevice::ReadOnly))
{
return;
}
auto data = ignoreFile.readAll();
auto string = QString::fromUtf8(data);
proxyModel->setBlockedPaths(string.split('\n', QString::SkipEmptyParts));
}
void ExportInstanceDialog::savePackIgnore()
{
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auto data = proxyModel->blockedPaths().toStringList().join('\n').toUtf8();
auto filename = ignoreFileName();
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try
{
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FS::write(filename, data);
}
catch (Exception & e)
{
qWarning() << e.cause();
}
}
#include "ExportInstanceDialog.moc"