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pavucontrol-qt-packaging/libfm-qt/proxyfoldermodel.cpp

275 lines
10 KiB

/*
<one line to give the library's name and an idea of what it does.>
Copyright (C) 2012 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "proxyfoldermodel.h"
#include "foldermodel.h"
#include <QCollator>
using namespace Fm;
ProxyFolderModel::ProxyFolderModel(QObject * parent):
QSortFilterProxyModel(parent),
thumbnailSize_(0),
showHidden_(false),
showThumbnails_(false),
folderFirst_(true) {
setDynamicSortFilter(true);
setSortCaseSensitivity(Qt::CaseInsensitive);
}
ProxyFolderModel::~ProxyFolderModel() {
qDebug("delete ProxyFolderModel");
if(showThumbnails_ && thumbnailSize_ != 0) {
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
// tell the source model that we don't need the thumnails anymore
if(srcModel) {
srcModel->releaseThumbnails(thumbnailSize_);
disconnect(srcModel, SIGNAL(thumbnailLoaded(QModelIndex,int)));
}
}
}
void ProxyFolderModel::setSourceModel(QAbstractItemModel* model) {
if(model) {
// we only support Fm::FolderModel
Q_ASSERT(model->inherits("Fm::FolderModel"));
if(showThumbnails_ && thumbnailSize_ != 0) { // if we're showing thumbnails
FolderModel* oldSrcModel = static_cast<FolderModel*>(sourceModel());
FolderModel* newSrcModel = static_cast<FolderModel*>(model);
if(oldSrcModel) { // we need to release cached thumbnails for the old source model
oldSrcModel->releaseThumbnails(thumbnailSize_);
disconnect(oldSrcModel, SIGNAL(thumbnailLoaded(QModelIndex,int)));
}
if(newSrcModel) { // tell the new source model that we want thumbnails of this size
newSrcModel->cacheThumbnails(thumbnailSize_);
connect(newSrcModel, &FolderModel::thumbnailLoaded, this, &ProxyFolderModel::onThumbnailLoaded);
}
}
}
QSortFilterProxyModel::setSourceModel(model);
}
void ProxyFolderModel::sort(int column, Qt::SortOrder order) {
int oldColumn = sortColumn();
Qt::SortOrder oldOrder = sortOrder();
QSortFilterProxyModel::sort(column, order);
if(column != oldColumn || order != oldOrder) {
Q_EMIT sortFilterChanged();
}
}
void ProxyFolderModel::setShowHidden(bool show) {
if(show != showHidden_) {
showHidden_ = show;
invalidateFilter();
Q_EMIT sortFilterChanged();
}
}
// need to call invalidateFilter() manually.
void ProxyFolderModel::setFolderFirst(bool folderFirst) {
if(folderFirst != folderFirst_) {
folderFirst_ = folderFirst;
invalidate();
Q_EMIT sortFilterChanged();
}
}
bool ProxyFolderModel::filterAcceptsRow(int source_row, const QModelIndex & source_parent) const {
if(!showHidden_) {
QAbstractItemModel* srcModel = sourceModel();
QString name = srcModel->data(srcModel->index(source_row, 0, source_parent)).toString();
if(name.startsWith(".") || name.endsWith("~"))
return false;
}
// apply additional filters if there're any
Q_FOREACH(ProxyFolderModelFilter* filter, filters_) {
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
FmFileInfo* fileInfo = srcModel->fileInfoFromIndex(srcModel->index(source_row, 0, source_parent));
if(!filter->filterAcceptsRow(this, fileInfo))
return false;
}
return true;
}
bool ProxyFolderModel::lessThan(const QModelIndex& left, const QModelIndex& right) const {
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
// left and right are indexes of source model, not the proxy model.
if(srcModel) {
FmFileInfo* leftInfo = srcModel->fileInfoFromIndex(left);
FmFileInfo* rightInfo = srcModel->fileInfoFromIndex(right);
if(Q_UNLIKELY(!leftInfo || !rightInfo)) {
// In theory, this should not happen, but it's safer to add the null check.
// This is reported in https://github.com/lxde/pcmanfm-qt/issues/205
return false;
}
if(folderFirst_) {
bool leftIsFolder = (bool)fm_file_info_is_dir(leftInfo);
bool rightIsFolder = (bool)fm_file_info_is_dir(rightInfo);
if(leftIsFolder != rightIsFolder)
return sortOrder() == Qt::AscendingOrder ? leftIsFolder : rightIsFolder;
}
switch(sortColumn()) {
case FolderModel::ColumnFileName:
if(sortCaseSensitivity() == Qt::CaseSensitive) {
// fm_file_info_get_collate_key_nocasefold() uses g_utf8_casefold() from glib internally, which
// is only an approximation not working correctly in some locales.
// FIXME: we may use QCollator (since Qt 5.2) for this, but the performance impact is unknown
return strcmp(fm_file_info_get_collate_key_nocasefold(leftInfo), fm_file_info_get_collate_key_nocasefold(rightInfo)) < 0;
/*
QCollator coll;
coll.setCaseSensitivity(Qt::CaseSensitive);
coll.setIgnorePunctuation(false);
coll.setNumericMode(true);
return coll.compare(QString::fromUtf8(fm_file_info_get_disp_name(leftInfo)), QString::fromUtf8(fm_file_info_get_disp_name(rightInfo))) < 0;
*/
}
else {
// linguistic case insensitive ordering
return strcmp(fm_file_info_get_collate_key(leftInfo), fm_file_info_get_collate_key(rightInfo)) < 0;
}
case FolderModel::ColumnFileMTime:
return fm_file_info_get_mtime(leftInfo) < fm_file_info_get_mtime(rightInfo);
case FolderModel::ColumnFileSize:
return fm_file_info_get_size(leftInfo) < fm_file_info_get_size(rightInfo);
case FolderModel::ColumnFileOwner:
// TODO: sort by owner
break;
case FolderModel::ColumnFileType:
break;
}
}
return QSortFilterProxyModel::lessThan(left, right);
}
FmFileInfo* ProxyFolderModel::fileInfoFromIndex(const QModelIndex& index) const {
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
if(srcModel) {
QModelIndex srcIndex = mapToSource(index);
return srcModel->fileInfoFromIndex(srcIndex);
}
return NULL;
}
void ProxyFolderModel::setShowThumbnails(bool show) {
if(show != showThumbnails_) {
showThumbnails_ = show;
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
if(srcModel && thumbnailSize_ != 0) {
if(show) {
// ask for cache of thumbnails of the new size in source model
srcModel->cacheThumbnails(thumbnailSize_);
// connect to the srcModel so we can be notified when a thumbnail is loaded.
connect(srcModel, &FolderModel::thumbnailLoaded, this, &ProxyFolderModel::onThumbnailLoaded);
}
else { // turn off thumbnails
// free cached old thumbnails in souce model
srcModel->releaseThumbnails(thumbnailSize_);
disconnect(srcModel, SIGNAL(thumbnailLoaded(QModelIndex,int)));
}
// reload all items, FIXME: can we only update items previously having thumbnails
Q_EMIT dataChanged(index(0, 0), index(rowCount() - 1, 0));
}
}
}
void ProxyFolderModel::setThumbnailSize(int size) {
if(size != thumbnailSize_) {
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
if(showThumbnails_ && srcModel) {
// free cached thumbnails of the old size
if(thumbnailSize_ != 0)
srcModel->releaseThumbnails(thumbnailSize_);
else {
// if the old thumbnail size is 0, we did not turn on thumbnail initially
connect(srcModel, &FolderModel::thumbnailLoaded, this, &ProxyFolderModel::onThumbnailLoaded);
}
// ask for cache of thumbnails of the new size in source model
srcModel->cacheThumbnails(size);
// reload all items, FIXME: can we only update items previously having thumbnails
Q_EMIT dataChanged(index(0, 0), index(rowCount() - 1, 0));
}
thumbnailSize_ = size;
}
}
QVariant ProxyFolderModel::data(const QModelIndex& index, int role) const {
if(index.column() == 0) { // only show the decoration role for the first column
if(role == Qt::DecorationRole && showThumbnails_ && thumbnailSize_) {
// we need to show thumbnails instead of icons
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
QModelIndex srcIndex = mapToSource(index);
QImage image = srcModel->thumbnailFromIndex(srcIndex, thumbnailSize_);
if(!image.isNull()) // if we got a thumbnail of the desired size, use it
return QVariant(image);
}
}
// fallback to icons if thumbnails are not available
return QSortFilterProxyModel::data(index, role);
}
void ProxyFolderModel::onThumbnailLoaded(const QModelIndex& srcIndex, int size) {
// FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
// FolderModelItem* item = srcModel->itemFromIndex(srcIndex);
// qDebug("ProxyFolderModel::onThumbnailLoaded: %d, %s", size, item->displayName.toUtf8().data());
if(size == thumbnailSize_) { // if a thumbnail of the size we want is loaded
QModelIndex index = mapFromSource(srcIndex);
Q_EMIT dataChanged(index, index);
}
}
void ProxyFolderModel::addFilter(ProxyFolderModelFilter* filter) {
filters_.append(filter);
invalidateFilter();
Q_EMIT sortFilterChanged();
}
void ProxyFolderModel::removeFilter(ProxyFolderModelFilter* filter) {
filters_.removeOne(filter);
invalidateFilter();
Q_EMIT sortFilterChanged();
}
#if 0
void ProxyFolderModel::reloadAllThumbnails() {
// reload all thumbnails and update UI
FolderModel* srcModel = static_cast<FolderModel*>(sourceModel());
if(srcModel) {
int rows= rowCount();
for(int row = 0; row < rows; ++row) {
QModelIndex index = this->index(row, 0);
QModelIndex srcIndex = mapToSource(index);
QImage image = srcModel->thumbnailFromIndex(srcIndex, size);
// tell the world that the item is changed to trigger a UI update
if(!image.isNull())
Q_EMIT dataChanged(index, index);
}
}
}
#endif