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

558 lines
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/*
<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 "foldermodel.h"
#include "icontheme.h"
#include <iostream>
#include <QtAlgorithms>
#include <QVector>
#include <qmimedata.h>
#include <QMimeData>
#include <QByteArray>
#include <QPixmap>
#include <QPainter>
#include "utilities.h"
#include "fileoperation.h"
#include "thumbnailloader.h"
using namespace Fm;
FolderModel::FolderModel() :
folder_(NULL) {
/*
ColumnIcon,
ColumnName,
ColumnFileType,
ColumnMTime,
NumOfColumns
*/
thumbnailRefCounts.reserve(4);
// reload all icons when the icon theme is changed
connect(IconTheme::instance(), &IconTheme::changed, this, &FolderModel::updateIcons);
}
FolderModel::~FolderModel() {
qDebug("delete FolderModel");
if(folder_)
setFolder(NULL);
// if the thumbnail requests list is not empty, cancel them
if(!thumbnailResults.empty()) {
Q_FOREACH(FmThumbnailLoader* res, thumbnailResults) {
ThumbnailLoader::cancel(res);
}
}
}
void FolderModel::setFolder(FmFolder* new_folder) {
if(folder_) {
removeAll(); // remove old items
g_signal_handlers_disconnect_by_func(folder_, gpointer(onStartLoading), this);
g_signal_handlers_disconnect_by_func(folder_, gpointer(onFinishLoading), this);
g_signal_handlers_disconnect_by_func(folder_, gpointer(onFilesAdded), this);
g_signal_handlers_disconnect_by_func(folder_, gpointer(onFilesChanged), this);
g_signal_handlers_disconnect_by_func(folder_, gpointer(onFilesRemoved), this);
g_object_unref(folder_);
}
if(new_folder) {
folder_ = FM_FOLDER(g_object_ref(new_folder));
g_signal_connect(folder_, "start-loading", G_CALLBACK(onStartLoading), this);
g_signal_connect(folder_, "finish-loading", G_CALLBACK(onFinishLoading), this);
g_signal_connect(folder_, "files-added", G_CALLBACK(onFilesAdded), this);
g_signal_connect(folder_, "files-changed", G_CALLBACK(onFilesChanged), this);
g_signal_connect(folder_, "files-removed", G_CALLBACK(onFilesRemoved), this);
// handle the case if the folder is already loaded
if(fm_folder_is_loaded(folder_))
insertFiles(0, fm_folder_get_files(folder_));
}
else
folder_ = NULL;
}
void FolderModel::onStartLoading(FmFolder* folder, gpointer user_data) {
FolderModel* model = static_cast<FolderModel*>(user_data);
// remove all items
model->removeAll();
}
void FolderModel::onFinishLoading(FmFolder* folder, gpointer user_data) {
FolderModel* model = static_cast<FolderModel*>(user_data);
}
void FolderModel::onFilesAdded(FmFolder* folder, GSList* files, gpointer user_data) {
FolderModel* model = static_cast<FolderModel*>(user_data);
int n_files = g_slist_length(files);
model->beginInsertRows(QModelIndex(), model->items.count(), model->items.count() + n_files - 1);
for(GSList* l = files; l; l = l->next) {
FmFileInfo* info = FM_FILE_INFO(l->data);
FolderModelItem item(info);
/*
if(fm_file_info_is_hidden(info)) {
model->hiddenItems.append(item);
continue;
}
*/
model->items.append(item);
}
model->endInsertRows();
}
//static
void FolderModel::onFilesChanged(FmFolder* folder, GSList* files, gpointer user_data) {
FolderModel* model = static_cast<FolderModel*>(user_data);
int n_files = g_slist_length(files);
for(GSList* l = files; l; l = l->next) {
FmFileInfo* info = FM_FILE_INFO(l->data);
int row;
QList<FolderModelItem>::iterator it = model->findItemByFileInfo(info, &row);
if(it != model->items.end()) {
FolderModelItem& item = *it;
// try to update the item
item.displayName = QString::fromUtf8(fm_file_info_get_disp_name(info));
item.updateIcon();
item.thumbnails.clear();
QModelIndex index = model->createIndex(row, 0, &item);
Q_EMIT model->dataChanged(index, index);
}
}
}
//static
void FolderModel::onFilesRemoved(FmFolder* folder, GSList* files, gpointer user_data) {
FolderModel* model = static_cast<FolderModel*>(user_data);
for(GSList* l = files; l; l = l->next) {
FmFileInfo* info = FM_FILE_INFO(l->data);
const char* name = fm_file_info_get_name(info);
int row;
QList<FolderModelItem>::iterator it = model->findItemByName(name, &row);
if(it != model->items.end()) {
model->beginRemoveRows(QModelIndex(), row, row);
model->items.erase(it);
model->endRemoveRows();
}
}
}
void FolderModel::insertFiles(int row, FmFileInfoList* files) {
int n_files = fm_file_info_list_get_length(files);
beginInsertRows(QModelIndex(), row, row + n_files - 1);
for(GList* l = fm_file_info_list_peek_head_link(files); l; l = l->next) {
FolderModelItem item(FM_FILE_INFO(l->data));
items.append(item);
}
endInsertRows();
}
void FolderModel::removeAll() {
if(items.empty())
return;
beginRemoveRows(QModelIndex(), 0, items.size() - 1);
items.clear();
endRemoveRows();
}
int FolderModel::rowCount(const QModelIndex & parent) const {
if(parent.isValid())
return 0;
return items.size();
}
int FolderModel::columnCount (const QModelIndex & parent = QModelIndex()) const {
if(parent.isValid())
return 0;
return NumOfColumns;
}
FolderModelItem* FolderModel::itemFromIndex(const QModelIndex& index) const {
return reinterpret_cast<FolderModelItem*>(index.internalPointer());
}
FmFileInfo* FolderModel::fileInfoFromIndex(const QModelIndex& index) const {
FolderModelItem* item = itemFromIndex(index);
return item ? item->info : NULL;
}
QVariant FolderModel::data(const QModelIndex & index, int role = Qt::DisplayRole) const {
if(!index.isValid() || index.row() > items.size() || index.column() >= NumOfColumns) {
return QVariant();
}
FolderModelItem* item = itemFromIndex(index);
FmFileInfo* info = item->info;
switch(role) {
case Qt::ToolTipRole:
return QVariant(item->displayName);
case Qt::DisplayRole: {
switch(index.column()) {
case ColumnFileName: {
return QVariant(item->displayName);
}
case ColumnFileType: {
FmMimeType* mime = fm_file_info_get_mime_type(info);
const char* desc = fm_mime_type_get_desc(mime);
return QString::fromUtf8(desc);
}
case ColumnFileMTime: {
const char* name = fm_file_info_get_disp_mtime(info);
return QString::fromUtf8(name);
}
case ColumnFileSize: {
const char* name = fm_file_info_get_disp_size(info);
return QString::fromUtf8(name);
break;
}
case ColumnFileOwner: {
const char* name = fm_file_info_get_disp_owner(info);
return QString::fromUtf8(name);
break;
}
}
}
case Qt::DecorationRole: {
if(index.column() == 0) {
// QPixmap pix = IconTheme::loadIcon(fm_file_info_get_icon(info), iconSize_);
return QVariant(item->icon);
// return QVariant(pix);
}
}
case FileInfoRole:
return qVariantFromValue((void*)info);
}
return QVariant();
}
QVariant FolderModel::headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const {
if(role == Qt::DisplayRole) {
if(orientation == Qt::Horizontal) {
QString title;
switch(section) {
case ColumnFileName:
title = tr("Name");
break;
case ColumnFileType:
title = tr("Type");
break;
case ColumnFileSize:
title = tr("Size");
break;
case ColumnFileMTime:
title = tr("Modified");
break;
case ColumnFileOwner:
title = tr("Owner");
break;
}
return QVariant(title);
}
}
return QVariant();
}
QModelIndex FolderModel::index(int row, int column, const QModelIndex & parent) const {
if(row <0 || row >= items.size() || column < 0 || column >= NumOfColumns)
return QModelIndex();
const FolderModelItem& item = items.at(row);
return createIndex(row, column, (void*)&item);
}
QModelIndex FolderModel::parent(const QModelIndex & index) const {
return QModelIndex();
}
Qt::ItemFlags FolderModel::flags(const QModelIndex& index) const {
// FIXME: should not return same flags unconditionally for all columns
Qt::ItemFlags flags;
if(index.isValid()) {
flags = Qt::ItemIsEnabled|Qt::ItemIsSelectable;
if(index.column() == ColumnFileName)
flags |= (Qt::ItemIsDragEnabled|Qt::ItemIsDropEnabled);
}
else {
flags = Qt::ItemIsDropEnabled;
}
return flags;
}
// FIXME: this is very inefficient and should be replaced with a
// more reasonable implementation later.
QList<FolderModelItem>::iterator FolderModel::findItemByPath(FmPath* path, int* row) {
QList<FolderModelItem>::iterator it = items.begin();
int i = 0;
while(it != items.end()) {
FolderModelItem& item = *it;
FmPath* item_path = fm_file_info_get_path(item.info);
if(fm_path_equal(item_path, path)) {
*row = i;
return it;
}
++it;
++i;
}
return items.end();
}
// FIXME: this is very inefficient and should be replaced with a
// more reasonable implementation later.
QList<FolderModelItem>::iterator FolderModel::findItemByName(const char* name, int* row) {
QList<FolderModelItem>::iterator it = items.begin();
int i = 0;
while(it != items.end()) {
FolderModelItem& item = *it;
const char* item_name = fm_file_info_get_name(item.info);
if(strcmp(name, item_name) == 0) {
*row = i;
return it;
}
++it;
++i;
}
return items.end();
}
QList< FolderModelItem >::iterator FolderModel::findItemByFileInfo(FmFileInfo* info, int* row) {
QList<FolderModelItem>::iterator it = items.begin();
int i = 0;
while(it != items.end()) {
FolderModelItem& item = *it;
if(item.info == info) {
*row = i;
return it;
}
++it;
++i;
}
return items.end();
}
QStringList FolderModel::mimeTypes() const {
qDebug("FolderModel::mimeTypes");
QStringList types = QAbstractItemModel::mimeTypes();
// now types contains "application/x-qabstractitemmodeldatalist"
types << "text/uri-list";
// types << "x-special/gnome-copied-files";
return types;
}
QMimeData* FolderModel::mimeData(const QModelIndexList& indexes) const {
QMimeData* data = QAbstractItemModel::mimeData(indexes);
qDebug("FolderModel::mimeData");
// build a uri list
QByteArray urilist;
urilist.reserve(4096);
QModelIndexList::const_iterator it;
for(it = indexes.constBegin(); it != indexes.end(); ++it) {
const QModelIndex index = *it;
FolderModelItem* item = itemFromIndex(index);
if(item) {
FmPath* path = fm_file_info_get_path(item->info);
char* uri = fm_path_to_uri(path);
urilist.append(uri);
urilist.append('\n');
g_free(uri);
}
}
data->setData("text/uri-list", urilist);
return data;
}
bool FolderModel::dropMimeData(const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent) {
qDebug("FolderModel::dropMimeData");
if(!folder_)
return false;
FmPath* destPath;
if(parent.isValid()) { // drop on an item
FmFileInfo* info;
if(row == -1 && column == -1)
info = fileInfoFromIndex(parent);
else {
QModelIndex itemIndex = parent.child(row, column);
info = fileInfoFromIndex(itemIndex);
}
if(info)
destPath = fm_file_info_get_path(info);
else
return false;
}
else { // drop on blank area of the folder
destPath = path();
}
// FIXME: should we put this in dropEvent handler of FolderView instead?
if(data->hasUrls()) {
qDebug("drop action: %d", action);
FmPathList* srcPaths = pathListFromQUrls(data->urls());
switch(action) {
case Qt::CopyAction:
FileOperation::copyFiles(srcPaths, destPath);
break;
case Qt::MoveAction:
FileOperation::moveFiles(srcPaths, destPath);
break;
case Qt::LinkAction:
FileOperation::symlinkFiles(srcPaths, destPath);
default:
fm_path_list_unref(srcPaths);
return false;
}
fm_path_list_unref(srcPaths);
return true;
}
else if(data->hasFormat("application/x-qabstractitemmodeldatalist")) {
return true;
}
return QAbstractListModel::dropMimeData(data, action, row, column, parent);
}
Qt::DropActions FolderModel::supportedDropActions() const {
qDebug("FolderModel::supportedDropActions");
return Qt::CopyAction|Qt::MoveAction|Qt::LinkAction;
}
// ask the model to load thumbnails of the specified size
void FolderModel::cacheThumbnails(int size) {
QVector<QPair<int, int> >::iterator it;
for(it = thumbnailRefCounts.begin(); it != thumbnailRefCounts.end(); ++it) {
if(it->first == size) {
break;
}
}
if(it != thumbnailRefCounts.end())
++it->second;
else
thumbnailRefCounts.append(QPair<int, int>(size, 1));
}
// ask the model to free cached thumbnails of the specified size
void FolderModel::releaseThumbnails(int size) {
QVector<QPair<int, int> >::iterator it;
for(it = thumbnailRefCounts.begin(); it != thumbnailRefCounts.end(); ++it) {
if(it->first == size) {
break;
}
}
if(it != thumbnailRefCounts.end()) {
--it->second;
if(it->second == 0) {
thumbnailRefCounts.erase(it);
// remove thumbnails that ara queued for loading from thumbnailResults
QLinkedList<FmThumbnailLoader*>::iterator it;
for(it = thumbnailResults.begin(); it != thumbnailResults.end();) {
QLinkedList<FmThumbnailLoader*>::iterator next = it + 1;
FmThumbnailLoader* res = *it;
if(ThumbnailLoader::size(res) == size) {
ThumbnailLoader::cancel(res);
thumbnailResults.erase(it);
}
it = next;
}
// remove all cached thumbnails of the specified size
QList<FolderModelItem>::iterator itemIt;
for(itemIt = items.begin(); itemIt != items.end(); ++itemIt) {
FolderModelItem& item = *itemIt;
item.removeThumbnail(size);
}
}
}
}
void FolderModel::onThumbnailLoaded(FmThumbnailLoader* res, gpointer user_data) {
FolderModel* pThis = reinterpret_cast<FolderModel*>(user_data);
QLinkedList<FmThumbnailLoader*>::iterator it;
for(it = pThis->thumbnailResults.begin(); it != pThis->thumbnailResults.end(); ++it) {
if(*it == res) { // the thumbnail result is in our list
pThis->thumbnailResults.erase(it); // remove it from the list
FmFileInfo* info = ThumbnailLoader::fileInfo(res);
int row = -1;
// find the model item this thumbnail belongs to
QList<FolderModelItem>::iterator it = pThis->findItemByFileInfo(info, &row);
if(it != pThis->items.end()) {
// the file is found in our model
FolderModelItem& item = *it;
QModelIndex index = pThis->createIndex(row, 0, (void*)&item);
// store the image in the folder model item.
int size = ThumbnailLoader::size(res);
QImage image = ThumbnailLoader::image(res);
FolderModelItem::Thumbnail* thumbnail = item.findThumbnail(size);
thumbnail->image = image;
// qDebug("thumbnail loaded for: %s, size: %d", item.displayName.toUtf8().constData(), size);
if(image.isNull())
thumbnail->status = FolderModelItem::ThumbnailFailed;
else {
thumbnail->status = FolderModelItem::ThumbnailLoaded;
// FIXME: due to bugs in Qt's QStyledItemDelegate, if the image width and height
// are not the same, painting errors will happen. It's quite unfortunate.
// Let's do some padding to make its width and height equals.
// This greatly decrease performance :-(
// Later if we can re-implement our own item delegate, this can be avoided.
QPixmap pixmap = QPixmap(size, size);
pixmap.fill(QColor(0, 0, 0, 0)); // fill the pixmap with transparent color (alpha:0)
QPainter painter(&pixmap);
int x = (size - image.width()) / 2;
int y = (size - image.height()) / 2;
painter.drawImage(QPoint(x, y), image); // draw the image to the pixmap at center.
// FIXME: should we cache QPixmap instead for performance reason?
thumbnail->image = pixmap.toImage(); // convert it back to image
// tell the world that we have the thumbnail loaded
Q_EMIT pThis->thumbnailLoaded(index, size);
}
}
break;
}
}
}
// get a thumbnail of size at the index
// if a thumbnail is not yet loaded, this will initiate loading of the thumbnail.
QImage FolderModel::thumbnailFromIndex(const QModelIndex& index, int size) {
FolderModelItem* item = itemFromIndex(index);
if(item) {
FolderModelItem::Thumbnail* thumbnail = item->findThumbnail(size);
// qDebug("FolderModel::thumbnailFromIndex: %d, %s", thumbnail->status, item->displayName.toUtf8().data());
switch(thumbnail->status) {
case FolderModelItem::ThumbnailNotChecked: {
// load the thumbnail
FmThumbnailLoader* res = ThumbnailLoader::load(item->info, size, onThumbnailLoaded, this);
thumbnailResults.push_back(res);
thumbnail->status = FolderModelItem::ThumbnailLoading;
break;
}
case FolderModelItem::ThumbnailLoaded:
return thumbnail->image;
default:
break;
}
}
return QImage();
}
void FolderModel::updateIcons() {
QList<FolderModelItem>::iterator it = items.begin();
for(;it != items.end(); ++it) {
(*it).updateIcon();
}
}