krquery.cpp

LINUX 下, 以 QT/KDE 写的档案管理员

/***************************************************************************
                                 krquery.cpp
                             -------------------
    copyright            : (C) 2001 by Shie Erlich & Rafi Yanai
    email                : [e-mail]
    web site             : http://krusader.sourceforge.net
 ---------------------------------------------------------------------------
  Description
 ***************************************************************************

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                                                     S o u r c e    F i l e

 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/



#include "krquery.h"
#include "../krusader.h"
#include "../resources.h"
#include "vfs.h"
#include "krarchandler.h"
#include "krpermhandler.h"

#include <qtextstream.h>
#include <qtextcodec.h>
#include <qregexp.h>
#include <klargefile.h>
#include <klocale.h>
#include <kmimetype.h>
#include <qfile.h>
#include <kurlcompletion.h>
#include <kio/job.h>
#include <kfileitem.h>

#define  STATUS_SEND_DELAY     250
#define  MAX_LINE_LEN          500

// set the defaults
KRQuery::KRQuery(): QObject(), matchesCaseSensitive(true), bNull( true ),
                    contain(QString::null),containCaseSensetive(true),
                    containWholeWord(false),containOnRemote(false),
                    minSize(0),maxSize(0),newerThen(0),olderThen(0),
                    owner(QString::null),group(QString::null),perm(QString::null),
                    type(QString::null),inArchive(false),recurse(true),
                    followLinksP(true), receivedBuffer( 0 ), processEventsConnected(0)  {}

// set the defaults
KRQuery::KRQuery( const QString &name, bool matchCase ) : QObject(),
                    bNull( true ),contain(QString::null),containCaseSensetive(true),
                    containWholeWord(false), containOnRemote(false),
                    minSize(0),maxSize(0),newerThen(0),olderThen(0),
                    owner(QString::null),group(QString::null),perm(QString::null),
                    type(QString::null),inArchive(false),recurse(true),
                    followLinksP(true), receivedBuffer( 0 ), processEventsConnected(0) {
  setNameFilter( name, matchCase );
}

KRQuery::KRQuery( const KRQuery & that ) : QObject(), receivedBuffer( 0 ), processEventsConnected(0) {
  *this = that;
}

KRQuery::~KRQuery() {
  if( receivedBuffer )
    delete []receivedBuffer;
  receivedBuffer = 0;
}

KRQuery& KRQuery::operator=(const KRQuery &old) {
  matches = old.matches;
  excludes = old.excludes;
  includedDirs = old.includedDirs;
  excludedDirs = old.excludedDirs;
  matchesCaseSensitive = old.matchesCaseSensitive;
  bNull = old.bNull;
  contain = old.contain;
  containCaseSensetive = old.containCaseSensetive;
  containWholeWord = old.containWholeWord;
  containOnRemote = old.containOnRemote;
  minSize = old.minSize;
  maxSize = old.maxSize;
  newerThen = old.newerThen;
  olderThen = old.olderThen;
  owner = old.owner;
  group = old.group;
  perm = old.perm;
  type = old.type;
  customType = old.customType;
  inArchive = old.inArchive;
  recurse = old.recurse;
  followLinksP = old.followLinksP;
  whereToSearch = old.whereToSearch;
  whereNotToSearch = old.whereNotToSearch;
  origFilter = old.origFilter;
  
  return *this;
}

void KRQuery::connectNotify ( const char * signal ) {
  QString signalString  = QString( signal ).replace( " ", "" );
  QString processString = QString( SIGNAL( processEvents( bool & ) ) ).replace( " ", "" );
  if( signalString == processString )
    processEventsConnected++;
}

void KRQuery::disconnectNotify ( const char * signal ) {
  QString signalString  = QString( signal ).replace( " ", "" );
  QString processString = QString( SIGNAL( processEvents( bool & ) ) ).replace( " ", "" );
  if( signalString == processString )
    processEventsConnected--;
}

bool KRQuery::checkPerm( QString filePerm ) const
{
  for ( int i = 0; i < 9; ++i )
    if ( perm[ i ] != '?' && perm[ i ] != filePerm[ i + 1 ] ) return false;
  return true;
}

bool KRQuery::checkType( QString mime ) const
{
  if ( type == mime ) return true;
  if ( type == i18n( "Archives" ) ) return KRarcHandler::arcSupported( mime.right( 4 ) );
  if ( type == i18n( "Directories" ) ) return mime.contains( "directory" );
  if ( type == i18n( "Image Files" ) ) return mime.contains( "image/" );
  if ( type == i18n( "Text Files" ) ) return mime.contains( "text/" );
  if ( type == i18n( "Video Files" ) ) return mime.contains( "video/" );
  if ( type == i18n( "Audio Files" ) ) return mime.contains( "audio/" );
  if ( type == i18n( "Custom" ) ) return customType.contains( mime );
  return false;
}

bool KRQuery::match( const QString & name ) const {
  return matchCommon( name, matches, excludes );
}

bool KRQuery::matchDirName( const QString & name ) const {
  return matchCommon( name, includedDirs, excludedDirs );
}

bool KRQuery::matchCommon( const QString &nameIn, const QStringList &matchList, const QStringList &excludeList ) const
{
  if( excludeList.count() == 0 && matchList.count() == 0 ) /* true if there's no match condition */
    return true;

  QString name( nameIn );
  int ndx = nameIn.findRev( '/' ); // virtual filenames may contain '/'
  if( ndx != -1 )                  // but the end of the filename is OK
    name = nameIn.mid( ndx + 1 );

  unsigned int len;
  for ( unsigned int i = 0; i < excludeList.count(); ++i )
  {
    QRegExp( *excludeList.at( i ), matchesCaseSensitive, true ).match( name, 0, ( int* ) & len );
    if ( len == name.length() ) return false;
  }

  if( matchList.count() == 0 )
    return true;

  for ( unsigned int i = 0; i < matchList.count(); ++i )
  {
    QRegExp( *matchList.at( i ), matchesCaseSensitive, true ).match( name, 0, ( int* ) & len );
    if ( len == name.length() ) return true;
  }
  return false;
}

bool KRQuery::match( vfile *vf ) const
{
  if( vf->vfile_isDir() && !matchDirName( vf->vfile_getName() ) ) return false;
  // see if the name matches
  if ( !match( vf->vfile_getName() ) ) return false;
  // checking the mime
  if( !type.isEmpty() && !checkType( vf->vfile_getMime( true ) ) ) return false;
  // check that the size fit
  KIO::filesize_t size = vf->vfile_getSize();
  if ( minSize && size < minSize ) return false;
  if ( maxSize && size > maxSize ) return false;
  // check the time frame
  time_t mtime = vf->vfile_getTime_t();
  if ( olderThen && mtime > olderThen ) return false;
  if ( newerThen && mtime < newerThen ) return false;
  // check owner name
  if ( !owner.isEmpty() && vf->vfile_getOwner() != owner ) return false;
  // check group name
  if ( !group.isEmpty() && vf->vfile_getGroup() != group ) return false;
  //check permission
  if ( !perm.isEmpty() && !checkPerm( vf->vfile_getPerm() ) ) return false;

  if ( !contain.isEmpty() )
  {
    if( (totalBytes = vf->vfile_getSize()) == 0 )
      totalBytes++; // sanity
    receivedBytes = 0;
    if( receivedBuffer ) {
      delete []receivedBuffer;
      receivedBuffer = 0;
    }
    fileName = vf->vfile_getName();
    timer.start();

    if( vf->vfile_getUrl().isLocalFile() )
    {
      if( !containsContent( vf->vfile_getUrl().path() ) ) return false;
    }
    else
    {
      if( containOnRemote ) {
        if( processEventsConnected == 0 ) return false;
        if( !containsContent( vf->vfile_getUrl() ) ) return false;
      }
    }
  }

  return true;
}

bool KRQuery::match( KFileItem *kfi ) const {
  mode_t mode = kfi->mode() | kfi->permissions();
  QString perm = KRpermHandler::mode2QString( mode );
  if ( kfi->isDir() ) 
    perm[ 0 ] = 'd';

  vfile temp( kfi->text(), kfi->size(), perm, kfi->time( KIO::UDS_MODIFICATION_TIME ),
              kfi->isLink(), kfi->user(), kfi->group(), kfi->user(), 
              kfi->mimetype(), kfi->linkDest(), mode );

  return match( &temp );
}

// takes the string and adds BOLD to it, so that when it is displayed,
// the grepped text will be bold
void fixFoundTextForDisplay(QString& haystack, int start, int length) {
  QString before = haystack.left( start );
  QString text = haystack.mid( start, length );
  QString after = haystack.mid( start + length );

  before.replace( '&', "&amp;" );
  before.replace( '<', "&lt;" );
  before.replace( '>', "&gt;" );

  text.replace( '&', "&amp;" );
  text.replace( '<', "&lt;" );
  text.replace( '>', "&gt;" );

  after.replace( '&', "&amp;" );
  after.replace( '<', "&lt;" );
  after.replace( '>', "&gt;" );

  haystack = ("<qt>"+before+"<b>"+text+"</b>"+after+"</qt>" );
}

bool KRQuery::checkBuffer( const char *buf, int len ) const {
  if( len == 0 )  { // last block?
    if( receivedBuffer ) {
      bool result = checkLines( receivedBuffer, receivedBufferLen );
      delete []receivedBuffer;
      receivedBuffer = 0;
      return result;
    }
    return false;
  }

  int after = len;
  while( buf[ after-1 ] != '\n' && buf[ after-1 ] != 0 ) {
    after--;
    if( after <= 0 || after <= len - MAX_LINE_LEN ) {
      after = len;  // if there's no <ENTER> in MAX_LINE_LEN, we break the line
      break;        // breaking the line causes problems at Unicode characters
    }
  }

  if( receivedBuffer ) {
    int previous = 0;
    while( previous < after && previous < MAX_LINE_LEN && buf[previous] != '\n' && buf[previous] != 0 )
      previous++;

    char * str = new char[ receivedBufferLen + previous ];
    memcpy( str, receivedBuffer, receivedBufferLen );
    delete []receivedBuffer;
    receivedBuffer = 0;
    memcpy( str + receivedBufferLen, buf, previous );

    if( checkLines( str, receivedBufferLen+previous ) ) {
      delete []str;
      return true;
    }
    delete []str;

    if( after > previous && checkLines( buf+previous, after-previous ) )
      return true; 

  } else if( checkLines( buf, after ) )
      return true;

  if( after < len ) {
    receivedBufferLen = len-after;
    receivedBuffer = new char [ receivedBufferLen ];
    memcpy( receivedBuffer, buf+after, receivedBufferLen );
  }
  return false;
}

bool KRQuery::checkLines( const char * buf, int len ) const
{
  QStringList list;

  int start = 0;
  int k = 0;
  while( k < len )
  {