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/*
* This file Copyright (C) 2009-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
* $Id$
*/
#include <algorithm>
#include <cassert>
#include <QApplication>
#include <QHeaderView>
#include <QPainter>
#include <QResizeEvent>
#include <QSortFilterProxyModel>
#include <QStringList>
#include <libtransmission/transmission.h> // priorities
#include "file-tree.h"
#include "formatter.h"
#include "hig.h"
#include "torrent.h" // FileList
#include "utils.h" // mime icons
enum
{
COL_NAME,
FIRST_VISIBLE_COLUMN = COL_NAME,
COL_SIZE,
COL_PROGRESS,
COL_WANTED,
COL_PRIORITY,
LAST_VISIBLE_COLUMN = COL_PRIORITY,
COL_FILE_INDEX,
NUM_COLUMNS
};
/****
*****
****/
const QHash<QString,int>&
FileTreeItem::getMyChildRows ()
{
const size_t n = childCount();
// ensure that all the rows are hashed
while (myFirstUnhashedRow < n)
{
myChildRows.insert (myChildren[myFirstUnhashedRow]->name(),
myFirstUnhashedRow);
++myFirstUnhashedRow;
}
return myChildRows;
}
FileTreeItem::~FileTreeItem ()
{
assert(myChildren.isEmpty());
if (myParent != 0)
{
const int pos = row();
assert ((pos>=0) && "couldn't find child in parent's lookup");
myParent->myChildren.removeAt(pos);
myParent->myChildRows.remove(name());
myParent->myFirstUnhashedRow = pos;
}
}
void
FileTreeItem::appendChild (FileTreeItem * child)
{
const size_t n = childCount();
child->myParent = this;
myChildren.append (child);
myFirstUnhashedRow = n;
}
FileTreeItem *
FileTreeItem::child (const QString& filename)
{
FileTreeItem * item(0);
const int row = getMyChildRows().value (filename, -1);
if (row != -1)
{
item = child (row);
assert (filename == item->name());
}
return item;
}
int
FileTreeItem::row () const
{
int i(-1);
if(myParent)
{
i = myParent->getMyChildRows().value (name(), -1);
assert (this == myParent->myChildren[i]);
}
return i;
}
QVariant
FileTreeItem::data (int column, int role) const
{
QVariant value;
if (column == COL_FILE_INDEX)
{
value.setValue (myFileIndex);
}
else if (role == Qt::EditRole)
{
if (column == 0)
value.setValue (name());
}
else if ((role == Qt::TextAlignmentRole) && column == COL_SIZE)
{
value = Qt::AlignRight + Qt::AlignVCenter;
}
else if (role == Qt::DisplayRole)
{
switch(column)
{
case COL_NAME:
value.setValue (name());
break;
case COL_SIZE:
value.setValue (sizeString() + " ");
break;
case COL_PROGRESS:
value.setValue (progress());
break;
case COL_WANTED:
value.setValue (isSubtreeWanted());
break;
case COL_PRIORITY:
value.setValue (priorityString());
break;
}
}
else if (role == Qt::DecorationRole && column == COL_NAME)
{
if (childCount () > 0)
value = qApp->style ()->standardIcon (QStyle::SP_DirOpenIcon);
else
value = Utils::guessMimeIcon (name ());
}
return value;
}
void
FileTreeItem::getSubtreeWantedSize (uint64_t& have, uint64_t& total) const
{
if (myIsWanted)
{
have += myHaveSize;
total += myTotalSize;
}
foreach(const FileTreeItem * i, myChildren)
i->getSubtreeWantedSize(have, total);
}
double
FileTreeItem::progress () const
{
double d(0);
uint64_t have(0), total(0);
getSubtreeWantedSize (have, total);
if (total)
d = have / (double)total;
return d;
}
QString
FileTreeItem::sizeString () const
{
QString str;
if (myChildren.isEmpty())
{
str = Formatter::sizeToString (myTotalSize);
}
else
{
uint64_t have = 0;
uint64_t total = 0;
getSubtreeWantedSize (have, total);
str = Formatter::sizeToString (total);
}
return str;
}
std::pair<int,int>
FileTreeItem::update (const QString& name,
bool wanted,
int priority,
uint64_t haveSize,
bool updateFields)
{
int changed_count = 0;
int changed_columns[4];
if (myName != name)
{
if (myParent)
myParent->myFirstUnhashedRow = row();
myName = name;
changed_columns[changed_count++] = COL_NAME;
}
if (fileIndex () != -1)
{
if (myHaveSize != haveSize)
{
myHaveSize = haveSize;
changed_columns[changed_count++] = COL_PROGRESS;
}
if (updateFields)
{
if (myIsWanted != wanted)
{
myIsWanted = wanted;
changed_columns[changed_count++] = COL_WANTED;
}
if (myPriority != priority)
{
myPriority = priority;
changed_columns[changed_count++] = COL_PRIORITY;
}
}
}
std::pair<int,int> changed (-1, -1);
if (changed_count > 0)
{
std::sort (changed_columns, changed_columns+changed_count);
changed.first = changed_columns[0];
changed.second = changed_columns[changed_count-1];
}
return changed;
}
QString
FileTreeItem::priorityString () const
{
const int i = priority();
switch (i)
{
case LOW: return tr("Low");
case HIGH: return tr("High");
case NORMAL: return tr("Normal");
default: return tr("Mixed");
}
}
int
FileTreeItem::priority () const
{
int i(0);
if (myChildren.isEmpty())
{
switch (myPriority)
{
case TR_PRI_LOW:
i |= LOW;
break;
case TR_PRI_HIGH:
i |= HIGH;
break;
default:
i |= NORMAL;
break;
}
}
foreach (const FileTreeItem * child, myChildren)
i |= child->priority();
return i;
}
void
FileTreeItem::setSubtreePriority (int i, QSet<int>& ids)
{
if (myPriority != i)
{
myPriority = i;
if (myFileIndex >= 0)
ids.insert (myFileIndex);
}
foreach (FileTreeItem * child, myChildren)
child->setSubtreePriority (i, ids);
}
void
FileTreeItem::twiddlePriority (QSet<int>& ids, int& p)
{
const int old(priority());
if (old & LOW)
p = TR_PRI_NORMAL;
else if (old & NORMAL)
p = TR_PRI_HIGH;
else
p = TR_PRI_LOW;
setSubtreePriority (p, ids);
}
int
FileTreeItem::isSubtreeWanted () const
{
if(myChildren.isEmpty())
return myIsWanted ? Qt::Checked : Qt::Unchecked;
int wanted(-1);
foreach (const FileTreeItem * child, myChildren)
{
const int childWanted = child->isSubtreeWanted();
if (wanted == -1)
wanted = childWanted;
if (wanted != childWanted)
wanted = Qt::PartiallyChecked;
if (wanted == Qt::PartiallyChecked)
return wanted;
}
return wanted;
}
void
FileTreeItem::setSubtreeWanted (bool b, QSet<int>& ids)
{
if (myIsWanted != b)
{
myIsWanted = b;
if (myFileIndex >= 0)
ids.insert(myFileIndex);
}
foreach (FileTreeItem * child, myChildren)
child->setSubtreeWanted (b, ids);
}
void
FileTreeItem::twiddleWanted (QSet<int>& ids, bool& wanted)
{
wanted = isSubtreeWanted() != Qt::Checked;
setSubtreeWanted (wanted, ids);
}
QString
FileTreeItem::path () const
{
QString itemPath;
const FileTreeItem * item = this;
while (item != NULL && !item->name().isEmpty())
{
if (itemPath.isEmpty())
itemPath = item->name();
else
itemPath = item->name() + "/" + itemPath;
item = item->parent ();
}
return itemPath;
}
bool
FileTreeItem::isComplete () const
{
return myHaveSize == totalSize ();
}
/***
****
****
***/
FileTreeModel::FileTreeModel (QObject * parent, bool isEditable):
QAbstractItemModel(parent),
myRootItem (new FileTreeItem),
myIndexCache (),
myIsEditable (isEditable)
{
}
FileTreeModel::~FileTreeModel()
{
clear();
delete myRootItem;
}
FileTreeItem *
FileTreeModel::itemFromIndex (const QModelIndex& index) const
{
return static_cast<FileTreeItem*>(index.internalPointer());
}
QVariant
FileTreeModel::data (const QModelIndex &index, int role) const
{
QVariant value;
if (index.isValid())
value = itemFromIndex(index)->data (index.column(), role);
return value;
}
Qt::ItemFlags
FileTreeModel::flags (const QModelIndex& index) const
{
int i(Qt::ItemIsSelectable | Qt::ItemIsEnabled);
if(myIsEditable && (index.column() == COL_NAME))
i |= Qt::ItemIsEditable;
if(index.column() == COL_WANTED)
i |= Qt::ItemIsUserCheckable | Qt::ItemIsTristate;
return (Qt::ItemFlags)i;
}
bool
FileTreeModel::setData (const QModelIndex& index, const QVariant& newname, int role)
{
if (role == Qt::EditRole)
{
FileTreeItem * item = itemFromIndex (index);
emit pathEdited (item->path (), newname.toString ());
}
return false; // don't update the view until the session confirms the change
}
QVariant
FileTreeModel::headerData (int column, Qt::Orientation orientation, int role) const
{
QVariant data;
if (orientation==Qt::Horizontal && role==Qt::DisplayRole)
{
switch (column)
{
case COL_NAME:
data.setValue (tr("File"));
break;
case COL_SIZE:
data.setValue (tr("Size"));
break;
case COL_PROGRESS:
data.setValue (tr("Progress"));
break;
case COL_WANTED:
data.setValue (tr("Download"));
break;
case COL_PRIORITY:
data.setValue (tr("Priority"));
break;
default:
break;
}
}
return data;
}
QModelIndex
FileTreeModel::index (int row, int column, const QModelIndex& parent) const
{
QModelIndex i;
if (hasIndex (row, column, parent))
{
FileTreeItem * parentItem;
if (!parent.isValid ())
parentItem = myRootItem;
else
parentItem = itemFromIndex (parent);
FileTreeItem * childItem = parentItem->child (row);
if (childItem)
i = createIndex (row, column, childItem);
}
return i;
}
QModelIndex
FileTreeModel::parent (const QModelIndex& child) const
{
return parent (child, 0); // QAbstractItemModel::parent() wants col 0
}
QModelIndex
FileTreeModel::parent (const QModelIndex& child, int column) const
{
QModelIndex parent;
if (child.isValid())
parent = indexOf (itemFromIndex(child)->parent(), column);
return parent;
}
int
FileTreeModel::rowCount (const QModelIndex& parent) const
{
FileTreeItem * parentItem;
if (parent.isValid())
parentItem = itemFromIndex (parent);
else
parentItem = myRootItem;
return parentItem->childCount();
}
int
FileTreeModel::columnCount (const QModelIndex& parent) const
{
Q_UNUSED(parent);
return NUM_COLUMNS;
}
QModelIndex
FileTreeModel::indexOf (FileTreeItem * item, int column) const
{
if (!item || item==myRootItem)
return QModelIndex();
return createIndex(item->row(), column, item);
}
void
FileTreeModel::clearSubtree (const QModelIndex& top)
{
size_t i = rowCount (top);
while (i > 0)
clearSubtree(index(--i, 0, top));
FileTreeItem * const item = itemFromIndex (top);
if (item == 0)
return;
if (item->fileIndex () != -1)
myIndexCache.remove (item->fileIndex ());
delete item;
}
void
FileTreeModel::clear ()
{
beginResetModel ();
clearSubtree (QModelIndex());
endResetModel ();
assert (myIndexCache.isEmpty ());
}
FileTreeItem *
FileTreeModel::findItemForFileIndex (int fileIndex) const
{
return myIndexCache.value (fileIndex, 0);
}
void
FileTreeModel::addFile (int fileIndex,
const QString & filename,
bool wanted,
int priority,
uint64_t totalSize,
uint64_t have,
QList<QModelIndex> & rowsAdded,
bool updateFields)
{
FileTreeItem * item;
QStringList tokens = filename.split (QChar::fromLatin1('/'));
item = findItemForFileIndex (fileIndex);
if (item) // this file is already in the tree, we've added this
{
QModelIndex indexWithChangedParents;
while (!tokens.isEmpty())
{
const QString token = tokens.takeLast();
const std::pair<int,int> changed = item->update (token, wanted, priority, have, updateFields);
if (changed.first >= 0)
{
dataChanged (indexOf (item, changed.first), indexOf (item, changed.second));
if (!indexWithChangedParents.isValid () &&
changed.first <= COL_PRIORITY && changed.second >= COL_SIZE)
indexWithChangedParents = indexOf (item, 0);
}
item = item->parent();
}
assert (item == myRootItem);
if (indexWithChangedParents.isValid ())
parentsChanged (indexWithChangedParents, COL_SIZE, COL_PRIORITY);
}
else // we haven't build the FileTreeItems for these tokens yet
{
bool added = false;
item = myRootItem;
while (!tokens.isEmpty())
{
const QString token = tokens.takeFirst();
FileTreeItem * child(item->child(token));
if (!child)
{
added = true;
QModelIndex parentIndex (indexOf(item, 0));
const int n (item->childCount());
beginInsertRows (parentIndex, n, n);
if (tokens.isEmpty())
child = new FileTreeItem (token, fileIndex, totalSize);
else
child = new FileTreeItem (token);
item->appendChild (child);
endInsertRows ();
rowsAdded.append (indexOf(child, 0));
}
item = child;
}
if (item != myRootItem)
{
assert (item->fileIndex() == fileIndex);
assert (item->totalSize() == totalSize);
myIndexCache[fileIndex] = item;
const std::pair<int,int> changed = item->update (item->name(), wanted, priority, have, added || updateFields);
if (changed.first >= 0)
dataChanged (indexOf (item, changed.first), indexOf (item, changed.second));
}
}
}
void
FileTreeModel::parentsChanged (const QModelIndex& index, int firstColumn, int lastColumn)
{
assert (firstColumn <= lastColumn);
QModelIndex walk = index;
for (;;)
{
walk = parent (walk, firstColumn);
if (!walk.isValid ())
break;
dataChanged (walk, walk.sibling (walk.row (), lastColumn));
}
}
void
FileTreeModel::subtreeChanged (const QModelIndex& index, int firstColumn, int lastColumn)
{
assert (firstColumn <= lastColumn);
const int childCount = rowCount (index);
if (!childCount)
return;
// tell everyone that this tier changed
dataChanged (index.child (0, firstColumn), index.child (childCount - 1, lastColumn));
// walk the subtiers
for (int i=0; i<childCount; ++i)
subtreeChanged (index.child (i, 0), firstColumn, lastColumn);
}
void
FileTreeModel::clicked (const QModelIndex& index)
{
const int column (index.column());
if (!index.isValid())
return;
if (column == COL_WANTED)
{
bool want;
QSet<int> file_ids;
FileTreeItem * item;
item = itemFromIndex (index);
item->twiddleWanted (file_ids, want);
emit wantedChanged (file_ids, want);
dataChanged (index, index);
parentsChanged (index, COL_SIZE, COL_WANTED);
subtreeChanged (index, COL_WANTED, COL_WANTED);
}
else if (column == COL_PRIORITY)
{
int priority;
QSet<int> file_ids;
FileTreeItem * item;
item = itemFromIndex (index);
item->twiddlePriority (file_ids, priority);
emit priorityChanged (file_ids, priority);
dataChanged (index, index);
parentsChanged (index, column, column);
subtreeChanged (index, column, column);
}
}
void
FileTreeModel::doubleClicked (const QModelIndex& index)
{
if (!index.isValid())
return;
const int column (index.column());
if (column == COL_WANTED || column == COL_PRIORITY)
return;
FileTreeItem * item = itemFromIndex (index);
if (item->childCount () == 0 && item->isComplete ())
emit openRequested (item->path ());
}
/****
*****
****/
QSize
FileTreeDelegate::sizeHint(const QStyleOptionViewItem& item, const QModelIndex& index) const
{
QSize size;
switch(index.column())
{
case COL_PROGRESS:
case COL_WANTED:
size = QSize(20, 1);
break;
default:
size = QItemDelegate::sizeHint (item, index);
}
size.rheight() += 8; // make the spacing a little nicer
return size;
}
void
FileTreeDelegate::paint (QPainter * painter,
const QStyleOptionViewItem & option,
const QModelIndex & index) const
{
const int column(index.column());
if ((column != COL_PROGRESS) && (column != COL_WANTED))
{
QItemDelegate::paint(painter, option, index);
return;
}
QStyle * style (qApp->style ());
painter->save();
QItemDelegate::drawBackground (painter, option, index);
if(column == COL_PROGRESS)
{
QStyleOptionProgressBar p;
p.state = option.state | QStyle::State_Small;
p.direction = qApp->layoutDirection();
p.rect = option.rect;
p.rect.setSize (QSize(option.rect.width()-2, option.rect.height()-8));
p.rect.moveCenter (option.rect.center());
p.fontMetrics = qApp->fontMetrics();
p.minimum = 0;
p.maximum = 100;
p.textAlignment = Qt::AlignCenter;
p.textVisible = true;
p.progress = (int)(100.0*index.data().toDouble());
p.text = QString::fromLatin1 ("%1%").arg (p.progress);
style->drawControl(QStyle::CE_ProgressBar, &p, painter);
}
else if(column == COL_WANTED)
{
QStyleOptionButton o;
o.state = option.state;
o.direction = qApp->layoutDirection();
o.rect.setSize (QSize(20, option.rect.height()));
o.rect.moveCenter (option.rect.center());
o.fontMetrics = qApp->fontMetrics();
switch (index.data().toInt())
{
case Qt::Unchecked: o.state |= QStyle::State_Off; break;
case Qt::Checked: o.state |= QStyle::State_On; break;
default: o.state |= QStyle::State_NoChange;break;
}
style->drawControl (QStyle::CE_CheckBox, &o, painter);
}
QItemDelegate::drawFocus (painter, option, option.rect);
painter->restore();
}
/****
*****
*****
*****
****/
FileTreeView::FileTreeView (QWidget * parent, bool isEditable):
QTreeView (parent),
myModel (this, isEditable),
myProxy (new QSortFilterProxyModel()),
myDelegate (this)
{
setSortingEnabled (true);
setAlternatingRowColors (true);
setSelectionBehavior (QAbstractItemView::SelectRows);
setSelectionMode (QAbstractItemView::ExtendedSelection);
myProxy->setSourceModel (&myModel);
setModel (myProxy);
setItemDelegate (&myDelegate);
setHorizontalScrollBarPolicy (Qt::ScrollBarAlwaysOff);
sortByColumn (COL_NAME, Qt::AscendingOrder);
installEventFilter (this);
for (int i=0; i<NUM_COLUMNS; ++i)
{
setColumnHidden (i, (i<FIRST_VISIBLE_COLUMN) || (LAST_VISIBLE_COLUMN<i));
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
header()->setResizeMode(i, QHeaderView::Interactive);
#else
header()->setSectionResizeMode(i, QHeaderView::Interactive);
#endif
}
connect (this, SIGNAL(clicked(QModelIndex)),
this, SLOT(onClicked(QModelIndex)));
connect (this, SIGNAL(doubleClicked(QModelIndex)),
this, SLOT(onDoubleClicked(QModelIndex)));
connect (&myModel, SIGNAL(priorityChanged(QSet<int>, int)),
this, SIGNAL(priorityChanged(QSet<int>, int)));
connect (&myModel, SIGNAL(wantedChanged(QSet<int>, bool)),
this, SIGNAL(wantedChanged(QSet<int>, bool)));
connect (&myModel, SIGNAL(pathEdited(QString, QString)),
this, SIGNAL(pathEdited(QString, QString)));
connect (&myModel, SIGNAL (openRequested (QString)),
this, SLOT (onOpenRequested (QString)),
Qt::QueuedConnection);
}
FileTreeView::~FileTreeView ()
{
myProxy->deleteLater();
}
void
FileTreeView::onClicked (const QModelIndex& proxyIndex)
{
const QModelIndex modelIndex = myProxy->mapToSource (proxyIndex);
myModel.clicked (modelIndex);
}
void
FileTreeView::onDoubleClicked (const QModelIndex& proxyIndex)
{
const QModelIndex modelIndex = myProxy->mapToSource (proxyIndex);
myModel.doubleClicked (modelIndex);
}
void
FileTreeView::onOpenRequested (const QString& path)
{
if (state () == EditingState)
return;
emit openRequested (path);
}
bool
FileTreeView::eventFilter (QObject * o, QEvent * event)
{
// this is kind of a hack to get the last three columns be the
// right size, and to have the filename column use whatever
// space is left over...
if ((o == this) && (event->type() == QEvent::Resize))
{
QResizeEvent * r = static_cast<QResizeEvent*> (event);
int left = r->size().width();
const QFontMetrics fontMetrics(font());
for (int column=FIRST_VISIBLE_COLUMN; column<=LAST_VISIBLE_COLUMN; ++column)
{
if (column == COL_NAME)
continue;
if (isColumnHidden (column))
continue;
QString header;
if (column == COL_SIZE)
header = "999.9 KiB";
else
header = myModel.headerData (column, Qt::Horizontal).toString();
header += " ";
const int width = fontMetrics.size (0, header).width();
setColumnWidth (column, width);
left -= width;
}
left -= 20; // not sure why this is necessary. it works in different themes + font sizes though...
setColumnWidth(COL_NAME, std::max(left,0));
}
// handle using the keyboard to toggle the
// wanted/unwanted state or the file priority
else if (event->type () == QEvent::KeyPress && state () != EditingState)
{
switch (static_cast<QKeyEvent*> (event)->key ())
{
case Qt::Key_Space:
foreach (const QModelIndex& i, selectionModel ()->selectedRows (COL_WANTED))
clicked (i);
break;
case Qt::Key_Enter:
case Qt::Key_Return:
foreach (const QModelIndex& i, selectionModel ()->selectedRows (COL_PRIORITY))
clicked (i);
break;
}
}
return false;
}
void
FileTreeView::update (const FileList& files, bool updateFields)
{
foreach (const TrFile file, files)
{
QList<QModelIndex> added;
myModel.addFile (file.index, file.filename, file.wanted, file.priority, file.size, file.have, added, updateFields);
foreach (QModelIndex i, added)
expand (myProxy->mapFromSource(i));
}
}
void
FileTreeView::clear ()
{
myModel.clear();
}
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