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desktopmodel.cpp
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desktopmodel.cpp
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/*
License: GPL-2
An electronic filing cabinet: scan, print, stack, arrange
Copyright (C) 2009 Simon Glass, chch-kiwi@users.sourceforge.net
.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
.
This program 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 General Public License for more details.
.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
X-Comment: On Debian GNU/Linux systems, the complete text of the GNU General
Public License can be found in the /usr/share/common-licenses/GPL file.
*/
#include <assert.h>
#include "config.h"
#include "qapplication.h"
#include "qcursor.h"
#include "qmessagebox.h"
#include "qtimer.h"
#include <QDateTime>
#include <QDebug>
#include <QFileInfo>
#include <QIcon>
#include <QKeyEvent>
#include <QMimeData>
#include <QPixmap>
#include <QMouseEvent>
#include <QUndoStack>
#include "err.h"
#include "mem.h"
#include "desktopmodel.h"
#include "desktopundo.h"
#include "desk.h"
#include "file.h"
#include "paperstack.h"
#include "utils.h"
// time to delay between scanning each stack, should be 0 unless testing
#define DELAY_TIME 0 //1000
Desktopmodel::Desktopmodel(QObject *parent)
: QAbstractItemModel (parent)
{
// _desk = 0;
_updateTimer = new QTimer (this);
_updateTimer->setSingleShot (true);
_debug_level = 0;
_op = 0;
_subdirs = false;
_forceVisible = QString();
_drop_target = 0;
QFont font;
_fm = new QFontMetrics (font);
_scan_desk = 0;
_scan_file = 0;
_model_invalid = false;
_minor_change = false;
_need_scaled_image = false;
_cloned = false;
_flushTimer = new QTimer (this);
connect(_flushTimer, SIGNAL(timeout()), this, SLOT(flushAllDesks()));
_flushTimer->start(1000 * 60); // flush every minute
_undo = new Desktopundostack (this);
connect (_undo, SIGNAL (undoTextChanged (const QString &)),
this, SIGNAL (undoTextChanged (const QString &)));
connect (_undo, SIGNAL (redoTextChanged (const QString &)),
this, SIGNAL (redoTextChanged (const QString &)));
connect (_undo, SIGNAL (canUndoChanged (bool)),
this, SIGNAL (canUndoChanged (bool)));
connect (_undo, SIGNAL (canRedoChanged (bool)),
this, SIGNAL (canRedoChanged (bool)));
connect (_undo, SIGNAL (undoTextChanged (const QString &)),
this, SIGNAL (undoChanged ()));
connect (_undo, SIGNAL (redoTextChanged (const QString &)),
this, SIGNAL (undoChanged ()));
connect (_undo, SIGNAL (canUndoChanged (bool)),
this, SIGNAL (undoChanged ()));
connect (_undo, SIGNAL (canRedoChanged (bool)),
this, SIGNAL (undoChanged ()));
connect (_updateTimer, SIGNAL (timeout()), this, SLOT (nextUpdate ()));
connect (qApp, SIGNAL (aboutToQuit ()),
this, SLOT (aboutToQuit ()));
if (!_unknown)
{
_no_access = QPixmap (":images/images/no_access.xpm");
_unknown = QPixmap (":images/images/unknown.xpm");
Q_ASSERT (!_no_access.isNull ());
Q_ASSERT (!_unknown.isNull ());
}
}
Desktopmodel::~Desktopmodel()
{
delete _fm;
if (!_cloned)
while (!_desks.isEmpty ())
delete _desks.takeFirst ();
// ensure the maxdesk is correctly closed (writes the maxdesk.ini file)
// if (_desk)
// delete _desk;
}
#define MAX_ID 10240 // maximum ID we can assign to a 'desk' node
/** index points to a Desk */
#define IS_DESK(ind) ((unsigned)(ind).internalId () < MAX_ID)
/** index points to a File */
#define IS_FILE(ind) ((unsigned)(ind).internalId () >= MAX_ID)
#define DESK_INDEX(row) createIndex (row, 0, row + 10)
#define FILE_INDEX(row,f) createIndex (row, 0, (void *)f)
QVariant Desktopmodel::data(const QModelIndex &index, int role) const
{
// qDebug () << "data" << index << role;
if (!index.isValid() || _model_invalid)
return QVariant();
if (!IS_FILE (index))
return QVariant ();
Q_ASSERT (IS_FILE (index));
File *f = (File *)index.internalPointer ();
// if we don't have valid information for this stack, make a note to get it
if (!f->valid () && role == Role_pixmap)
{
Desktopmodel *model = (Desktopmodel *)this;
// don't add if already there (can happen with multiple redraws of an item)
if (!model->_pending_scan_list.contains (index))
{
// restart the timer if not running
if (_pending_scan_list.isEmpty ())
_updateTimer->start (DELAY_TIME);
model->_pending_scan_list << index;
}
}
switch (role)
{
case Qt::DecorationRole :
return QIcon (f->pixmap ());
case Qt::DisplayRole :
case Qt::EditRole :
return f->basename ();
case Role_position :
return f->pos ();
case Role_preview_maxsize :
return f->previewMaxsize ();
case Role_pixmap :
return f->pixmap ();
case Role_pagenum :
return f->pagenum ();
case Role_pagename :
return f->pageTitle (-1);
case Role_pagecount :
return f->pagecount ();
case Role_title_maxsize :
return f->titleMaxsize ();
case Role_pagename_maxsize :
return f->pagenameMaxsize ();
// this is only a guess, since we don't know what font will be used
case Role_maxsize :
{
QSize size;
// use the maximum width
// for height, use the pixmap preview plus 3 lines of text
size = f->previewMaxsize ();
size = size.expandedTo (f->titleMaxsize ());
size = size.expandedTo (f->pagenameMaxsize ());
size.setHeight (f->previewMaxsize ().height ()
+ 3 * _fm->height ());
return size;
}
// returns a string list of all the page names
case Role_pagename_list :
{
QStringList name;
int i;
for (i = 0; i < f->pagecount (); i++)
name << f->pageTitle (i);
return name;
}
case Role_valid :
return f->valid ();
case Role_droptarget :
return _drop_target && index == *_drop_target;
case Role_message :
if (f->err ())
return f->err ()->errstr;
else
{
QString str;
str = imageInfo (index, f->pagenum (), true);
/*
util_bytes_to_user (numstr, f->size);
str = QString ("%1 page%2, %3").arg (f->pagecount).arg (f->pagecount > 1 ? "s" : "").arg (numstr);
*/
if (_subdirs)
str += ", at " + f->pathname ();
return str;
}
case Role_pathname :
return f->pathname ();
case Role_filename :
return f->filename ();
case Role_author :
return getAnnot (index, File::Annot_author);
case Role_title :
return getAnnot (index, File::Annot_title);
case Role_keywords :
return getAnnot (index, File::Annot_keywords);
case Role_notes :
return getAnnot (index, File::Annot_notes);
case Role_error :
if (f->err ())
return f->err ()->errstr;
break;
}
return QVariant();
}
bool Desktopmodel::setData(const QModelIndex &index, const QVariant &value, int role)
{
bool changed = false;
if (!index.isValid() || !IS_FILE (index))
return false;
Q_ASSERT (IS_FILE (index));
File *f = (File *)index.internalPointer ();
switch (role)
{
case Qt::EditRole :
renameStack (index, value.toString ());
break;
case Qt::DecorationRole :
case Qt::DisplayRole :
case Role_pixmap :
case Role_pagecount :
break;
case Role_pagename :
renamePage (index, value.toString ());
break;
case Role_preview_maxsize :
f->setPreviewMaxsize (value.toSize ());
break;
case Role_title_maxsize :
f->setTitleMaxsize (value.toSize ());
break;
case Role_pagename_maxsize :
f->setPagenameMaxsize (value.toSize ());
break;
case Role_position :
f->setPos (value.toPoint ());
changed = true;
break;
case Role_pagenum :
{
int newpage = value.toInt ();
if (newpage < 0)
newpage = 0;
if (newpage >= f->pagecount ())
newpage = f->pagecount () - 1;
if (newpage != f->pagenum ())
{
f->setPagenum (newpage);
changed = true;
}
break;
}
}
if (changed)
{
QString pagename;
f->pixmap (true);
//FIXME: better to emit our own signal which tells Desktopdelegate to just update the pixmap
_minor_change = true;
emit dataChanged (index, index);
_minor_change = false;
}
return true;
}
Qt::ItemFlags Desktopmodel::flags(const QModelIndex &index) const
{
if (index.isValid())
return (Qt::ItemIsEnabled | Qt::ItemIsSelectable
| Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | Qt::ItemIsEditable);
return Qt::ItemIsDropEnabled;
}
int Desktopmodel::rowCount(const QModelIndex &parent) const
{
int count;
if (!parent.isValid())
count = _desks.size ();
else if (IS_DESK (parent))
count = getDesk (parent)->rowCount (); //fileCount ();
else
count = 0;
// qDebug () << "rowCount" << parent << count;
return count;
}
int Desktopmodel::columnCount(const QModelIndex &parent) const
{
if (IS_DESK (parent))
return 1;
return 0;
}
Qt::DropActions Desktopmodel::supportedDropActions() const
{
return Qt::CopyAction | Qt::MoveAction;
}
QModelIndex Desktopmodel::index (int row, int column, const QModelIndex &parent) const
{
QModelIndex ind;
// debug () << "index row =" << row;
// if (row == -1)
// {
// debug () << "bad row =" << row;
// }
if (parent == QModelIndex ())
{
if (column == 0 && row >= 0 && row < _desks.size ())
// printf ("%d, pixmap = %p\n", row, di->pixmap);
ind = DESK_INDEX (row);
}
else if (IS_DESK (parent))
{
// the parent is a desk node
Desk *desk = _desks [parent.internalId () - 10];
if (column == 0 && row >= 0 && row < desk->fileCount ())
ind = FILE_INDEX (row, desk->getFile (row));
}
// qDebug () << "index" << parent << "row" << row << "ind" << ind;
return ind;
}
QModelIndex Desktopmodel::index (const QString &fname, QModelIndex parent) const
{
if (parent == QModelIndex ())
{
for (int row = 0; row < _desks.size (); row++)
{
Desk *desk = _desks [row];
if (desk->dir () == fname)
return DESK_INDEX (row);
}
}
else // must be a desk
{
Desk *desk = getDesk (parent);
int row;
File *f = desk->findFile (fname, row);
if (f)
return FILE_INDEX (row, f);
}
return QModelIndex ();
}
QModelIndex Desktopmodel::parent(const QModelIndex &item) const
{
if (IS_FILE (item))
{
// this is a file node, so the parent will be a desk
File *file = (File *)item.internalPointer ();
Desk *desk = file->desk ();
int row = _desks.indexOf (desk);
Q_ASSERT (row != -1);
// qDebug () << "parent" << item;
return DESK_INDEX (row);
}
// otherwise parent is the root index
return QModelIndex ();
}
bool Desktopmodel::removeDesk (const QString &pathname)
{
QModelIndex ind = index (pathname + "/", QModelIndex ());
if (ind == QModelIndex ())
{
qDebug () << "Cannot find desk for" << pathname;
return false;
}
// TODO: check that when re-adding it reuses the same Desk
if (!IS_DESK (ind))
{
qDebug() << "Cannot removeDesk() on a non-Desk";
return false;
}
Desk *desk = getDesk (ind);
Q_ASSERT (desk);
int item = ind.row ();
beginRemoveRows (ind.parent (), ind.row (), ind.row ());
delete desk;
_desks.removeAt(item);
endRemoveRows ();
return true;
}
void Desktopmodel::setModelConv (Desktopmodelconv *modelconv)
{
_modelconv = modelconv;
}
QDebug Desktopmodel::debug (void) const
{
return qDebug () << "Desktopmodel";
}
Desktopundostack *Desktopmodel::getUndoStack (void)
{
return _undo;
}
File *Desktopmodel::getFile (const QModelIndex &index) const
{
_modelconv->assertIsSource (0, &index, 0);
if (!index.isValid ())
return NULL;
if (!IS_FILE (index))
{
qDebug () << "bad getFile" << index << index.internalId ();
}
Q_ASSERT (IS_FILE (index));
File *f = (File *)index.internalPointer ();
// if (!f->max && di->valid)
// qDebug () << "max is null, di->valid=" << di->valid;
// Q_ASSERT (!di->valid || f->max);
return f;
}
Desk *Desktopmodel::getDesk (const QModelIndex &index) const
{
_modelconv->assertIsSource (0, &index, 0);
if (!index.isValid ())
return NULL;
Q_ASSERT (IS_DESK (index));
// debug () << "rowCount" << _items.size ();
Desk *desk = _desks [index.internalId () - 10];
// if (!f->max && di->valid)
// qDebug () << "max is null, di->valid=" << di->valid;
// Q_ASSERT (!di->valid || f->max);
return desk;
}
QString &Desktopmodel::deskRootDir (QModelIndex ind)
{
return _desks [ind.row ()]->rootDir ();
}
pagepos_info Desktopmodel::getPosData (const QModelIndex &index) const
{
pagepos_info pos;
pos.pos = QPoint (-1, -1);
pos.pagenum = -1;
if (index.isValid ())
{
File *f = getFile (index);
pos.pos = f->pos ();
pos.pagenum = f->pagenum ();
pos.pagecount = f->pagecount ();
}
return pos;
}
#if 0// these functions not needed?
void Desktopmodel::savePersistentIndexes (void)
{
QModelIndexList list = persistentIndexList ();
_persistent_filenames = listToFilenames (list);
qDebug () << "savePersistentIndexes" << _persistent_filenames.size ();
foreach (QString str, _persistent_filenames)
qDebug () << " " << str;
}
void Desktopmodel::restorePersistentIndexes (void)
{
qDebug () << "restorePersistentIndexes" << _persistent_filenames.size ();
foreach (QString str, _persistent_filenames)
qDebug () << " " << str;
QModelIndexList list = listFromFilenames (_persistent_filenames);
changePersistentIndexList (persistentIndexList (), list);
}
#endif
QString Desktopmodel::deskToDirname (QModelIndex parent)
{
Desk *desk = getDesk (parent);
return desk->dir ();
}
QModelIndex Desktopmodel::deskFromDirname (QString &dir)
{
return index (dir, QModelIndex ());
}
QStringList Desktopmodel::listToFilenames (const QModelIndexList &list)
{
QModelIndex ind;
QStringList slist;
// add the filename for each index to the list
foreach (ind, list)
if (ind.isValid ())
slist << getFile (ind)->filename ();
return slist;
}
QModelIndexList Desktopmodel::listFromFilenames (const QStringList &slist,
QModelIndex parent)
{
QString fname;
QModelIndex ind;
QModelIndexList list;
// work through each filename in turn
foreach (fname, slist)
{
// search through all files looking for a match
ind = index (fname, parent);
// did the file disappear since we added it to the undo list?
if (ind == QModelIndex ())
printf ("Warning: filename '%s' is not present, but should be\n", qPrintable (fname));
// add the model index (found or not) to the list
list << ind;
}
return list;
}
void Desktopmodel::sortForDelete (QModelIndexList &list)
{
if (list.size () < 2)
return;
// get a list of the rows
QList<int> ilist;
QModelIndex ind, parent = list [0].parent ();
foreach (ind, list)
ilist << ind.row ();
// sort the list
std::sort (ilist.begin (), ilist.end (), std::greater<int> ());
// and create a sorted index list
list.clear ();
int i;
foreach (i, ilist)
{
list << index (i, 0, parent);
// printf (" %d\n", i);
}
}
typedef struct sort_info
{
QModelIndex ind;
QPoint pos;
} sort_info;
static bool positionLessThan (const sort_info &s1, const sort_info &s2)
{
int diff;
diff = s2.pos.y () - s1.pos.y ();
if (diff > 80)
return true;
else if (diff < -80)
return false;
return s1.pos.x () < s2.pos.x ();
}
void Desktopmodel::sortByPosition (QModelIndexList &list)
{
if (list.size () < 2)
return;
// get a list of the positions
QList<sort_info> ilist;
QModelIndex ind, parent = list [0].parent ();
foreach (ind, list)
{
sort_info s;
s.ind = ind;
s.pos = getFile (ind)->pos ();
ilist << s;
}
// sort the list
std::stable_sort (ilist.begin (), ilist.end (), positionLessThan);
// and create a sorted index list
list.clear ();
sort_info s;
foreach (s, ilist)
list << index (s.ind.row (), 0, parent);
}
void Desktopmodel::buildItem (QModelIndex index)
{
// qDebug () << "buildItem" << index;
File *f = getFile (index);
// if we can't load it, still mark it as valid otherwise we will keep loading it
if (f->load ())
f->setValid (true);
/* if we are asking for a page that has not been added yet, do nothing.
This happens during scanning */
if (f->pagenum () < f->pagecount ())
f->pixmap (true); // regenerate the pixmap
/* tell the view that the data has changed. The view will request the
new data. Note that if we don't have information about the item
size or titlesize yet, this will be calculated by the view (actually
delegate) and then stored back in the model */
emit dataChanged (index, index);
}
void Desktopmodel::aboutToQuit (void)
{
// we need to make sure that the maxdesk.ini file is saved
/*FIXME: port this
if (_desk)
{
delete _desk;
_desk = 0;
}
*/
}
QString Desktopmodel::getAnnot (QModelIndex ind, File::e_annot type) const
{
File *f = getFile (ind);
QString text;
text.clear ();
if (!f->valid()) {
f->setErr(err_make(ERRFN, ERR_file_not_loaded_yet1,
qPrintable(f->filename())));
return text;
}
if (f)
f->setErr (f->getAnnot (type, text));
return text;
}
/*************************** scanning support functions *****************************/
err_info *Desktopmodel::beginScan (QModelIndex parent, const QString &stack_name)
{
Desk *desk;
QModelIndexList list;
int row;
err_info *err = NULL;
// work out which desk to scan into
desk = getDesk (parent);
if (!desk)
err = err_make (ERRFN, ERR_do_not_have_a_valid_directory_to_scan_into);
qDebug () << "scan parent" << parent << desk;
if (!err)
// create the new stack
err = desk->addPaperstack (stack_name, _scan_file, row);
if (err)
{
// give up, and make a note to ignore future signals
_scan_err = true;
return err;
}
// stop this maxdesk from being disposed while we are scanning into it
desk->setAllowDispose (false);
// add to the model
qDebug () << "scan_file" << _scan_file;
newItem (row, parent, list);
emit beginningScan (list [0]);
/** set this last, since emitting beginningScan() may call checkScanStack()
which will get confused if we have already switch to the new stack */
_scan_desk = desk;
_scan_parent = parent;
_scan_err = false;
return NULL;
}
err_info *Desktopmodel::cancelScan (void)
{
if (_scan_err)
return NULL;
Q_ASSERT (_scan_desk && _scan_file);
QModelIndex ind = index (_scan_file->filename (), _scan_parent);
// emit a signal for the benefit of pagewidget - it will remove its pages
emit endingScan (true);
// allow the scanning maxdesk to be disposed (we have finished scanning into it)
_scan_desk->setAllowDispose (true);
// QModelIndex parent = _scan_parent;
_scan_parent = QModelIndex ();
_scan_desk = 0;
_scan_file = 0;
// remove the stack in the maxdesk if it is there
return opDeleteStack (ind);
}
err_info *Desktopmodel::confirmScan (void)
{
// qDebug () << "Desktopmodel::confirmScan";
Q_ASSERT (_scan_desk && _scan_file);
QModelIndex ind = index (_scan_file->filename (), _scan_parent);
// flush the item
CALL (_scan_file->flush ());
// this comment might not be relevant since Desktopmodel was enhanced to have multiple maxdesks:
/* at this point, although we have just flushed the item, it is possible
that the model does not have a valid max pointer (getFile(ind)->max).
This can happen when the user starts a scan, then clicks to another
folder then clicks back. Since the scan has not been flushed to the
filesystem yet, its stack might be blank and will have given an error
when loaded.
We are about to commit the scan, which will rely on the max pointer
being correct. The fix for this is in scanCommitPages() where we
re-read the stack */
// emit a signal for the benefit of pagewidget
// this may call scanCommitPages()
emit endingScan (false);
_scan_desk = 0;
_scan_file = 0;
if (ind != QModelIndex ())
{
//desk->rescanFile (getFile (ind)); // shouldn't need to do this now
buildItem (ind);
}
return NULL;
}
err_info *Desktopmodel::addPageToScan (const Filepage *mp, const QString &coverageStr)
{
if (_scan_err)
return NULL;
CALL (_scan_file->addPage (mp, false));
// qDebug () << "Desktopmodel::addPageToScan, page count" << _scan_file->pagecount;
emit newScannedPage (coverageStr, mp->markBlank ());
return NULL;
}
void Desktopmodel::pageStarting (Paperscan &scan, const PPage *page)
{
UNUSED (scan);
UNUSED (page);
if (_scan_err)
return;
// qDebug () << "pageStarting" << scan.getPagenum (page);
// no scaled image size registered as yet
_need_scaled_image = false;
_scaled_image_size = QSize ();
_scaled_linenum = 0;
emit beginningPage ();
}
void Desktopmodel::pageProgress (Paperscan &scan, const PPage *page)
{
QImage image;
const char *data = 0;
int scaled_linenum;
int size = 0;
bool ok;
if (_scan_err)
return;
ok = scan.getData (page, data, size);
// qDebug () << "pageProgress" << scan.getPagenum (page) << ok << size;
// emit dataAddedToPage (page, data, size);
if (ok && getNewScaledImage (scan, page, data, size, image, scaled_linenum))
{
// qDebug () << " newScaledImage";
emit newScaledImage (image, scaled_linenum);
}
}
#if QT_VERSION >= 0x040400
#define USE_24BPP
#endif
bool Desktopmodel::getNewScaledImage (Paperscan &scan, const PPage *page,
const char *data, int nbytes, QImage &image, int &scaled_linenum)
{
int width, height;
int depth, stride;
if (_need_scaled_image && scan.getPageDetails (page, width, height, depth, stride) && stride)
{
int linenum, lines;
// how many scan lines worth of data do we have?
lines = nbytes / stride;
// what scaled line number are we up to now?
linenum = lines * _scaled_image_size.height () / height;
// if no new lines, exit
// if (linenum == _scaled_linenum)
/** we must have at least 2 lines to work with to be sure of getting a
single line result */
if (linenum - _scaled_linenum < 2)
return false;
// start from the previous scaled line, to give us a a of margin
// otherwise we might get gaps in the final image
int scaled_from = _scaled_linenum;
if (scaled_from > 0)
scaled_from--;
/* we now need to generate an image from scaled lines _scaled_linenum
to linenum. First work out the input (unscaled) line numbers */
int from_linenum = scaled_from * height / _scaled_image_size.height ();
int to_linenum = linenum * height / _scaled_image_size.height ();
// qDebug () << "getNewScaledImage bytes " << nbytes << " lines from" << from_linenum << to_linenum;
Filepage::getImageFromLines (data + stride * from_linenum, width,
to_linenum - from_linenum, depth, stride, image);
if (image.format () == QImage::Format_Indexed8)
#ifdef USE_24BPP
image = image.convertToFormat (QImage::Format_RGB888);
#else
image = image.convertToFormat (QImage::Format_RGB32);
#endif
image = image.scaled (_scaled_image_size, Qt::KeepAspectRatio);
if (!image.height ())
return false;
// qDebug () << "desktopmodel image" << image.width () << image.height ()<< image.format ();
scaled_linenum = scaled_from;
_scaled_linenum = linenum;
return true;
}
return false;
}
void Desktopmodel::registerScaledImageSize (const QSize &size)
{
/* note that we need to generate scaled images (via emit newScaledImage()
whenever we receive new data for this page */
_need_scaled_image = true;
if (_scaled_image_size != size)
{
// if the size has changed, start the image again
_scaled_image_size = size;
_scaled_linenum = 0;
}
}
int Desktopmodel::getScanSize (void)
{