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/***************************************************************************
*
* Copyright (C) 2005 Elad Lahav ([email protected])
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***************************************************************************/
#ifndef DIRSCANNER_H
#define DIRSCANNER_H
#include <qobject.h>
#include <qevent.h>
#include <qthread.h>
#include <qdir.h>
#include <qstringlist.h>
#include <qdict.h>
#include <qlistview.h>
class DirScanner;
/**
* Defines a new event that can be used to pass progress information from the
* dir scanning thread to the main application thread.
* @author Elad Lahav
*/
class DirScanEvent : public QCustomEvent
{
public:
/** The event's unique ID. */
enum { EventId = 6924 };
DirScanEvent(int, bool);
/** The number of files already scanned. */
int m_nFiles;
/** True if the dir scanning thread has finished, false otherwise. */
bool m_bFinished;
};
/**
* A set of unique strings.
* Qt3 does not have a set class, so this is a simple implementation based on
* a QDict of dummy int pointers.
* @author Elad Lahav
*/
class StringSet : public QDict<int>
{
public:
StringSet() : QDict<int>() {}
void insert(const QString& sItem) {
static int nDummy = 0;
QDict<int>::insert(sItem, &nDummy);
}
bool exists(const QString& sItem) {
return find(sItem) != NULL;
}
};
/**
* Scans a directory for files matching a given pattern, using a separate thread.
* @author Elad Lahav
*/
class DirScanner : public QThread
{
public:
DirScanner(QObject*, QDict<QListViewItem>*);
~DirScanner();
void start(const QString&, const QString&, bool);
/**
* @return The list of files scanned by this thread.
*/
const QStringList& getFiles() { return m_slFiles; }
/**
* Stops a scanning process, by setting the object's cancel flag.
*/
void cancel() { m_bCancel = true; }
/**
* @return true if the user has cancelled the process, false otherwise
*/
bool wasCancelled() { return m_bCancel; }
protected:
virtual void run();
private:
/** Pointer to an object that receives the scanner update events. */
QObject* m_pEventReceiver;
/** Currently scanned directory. */
QDir m_dir;
/**
* A set of already-scanned directories (prevents infinite loops in case
* of cyclic symbolic links in the scanned file system).
*/
StringSet m_setScanned;
/** Pointer to a list of files indexed by the file path (used to identify
files that should not appear in the scan results.) */
QDict<QListViewItem>* m_pDicFiles;
/** Regular expression for scanning source files. */
QString m_sNameFilter;
/** The list of scanned file paths. */
QStringList m_slFiles;
/** A cancellation flag. Stops the scanning process when raised. */
bool m_bCancel;
/** true to descend to child directories, false otherwise. */
bool m_bRecursive;
int scanDir(QDir&);
};
#endif
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