expander.cpp

来自「LINUX 下, 以 QT/KDE 写的档案管理员」· C++ 代码 · 共 1,225 行 · 第 1/3 页

   /* from Panel/krview.h:
      enum SortSpec { Name=0x1, 
                              Ext=0x2,
                              Size=0x4,
                              Type=0x8,
                              Modified=0x10,
                              Permissions=0x20,
                              KrPermissions=0x40,
                              Owner=0x80,
                              Group=0x100,
                              Descending=0x200,
                              DirsFirst=0x400,
                              IgnoreCase=0x800 };
   */
   
//   krOut << "start: exp_ColSort::expFunc" << endl;
   #define MODE_OUT krOut << QString( "mode: %1" ).arg( mode, 0, 2 ) << endl; // displays mode in base-2
   //MODE_OUT
      
   if ( parameter.count() <= 1 || ( parameter[1].lower() != "asc" && parameter[1].lower() != "desc" ) ) {  //default == toggle
      if ( mode & KrViewProperties::Descending )
         mode &= ~KrViewProperties::Descending; // == asc
      else
         mode |= KrViewProperties::Descending; // == desc
   } else
   if ( parameter[1].lower() == "asc" ) {
      mode &= ~KrViewProperties::Descending;
   }
   else { // == desc
      mode |= KrViewProperties::Descending;
   }
   
   //MODE_OUT
   
   // clear all column-infromation:
   mode &= ~( KrViewProperties::Name | KrViewProperties::Ext | KrViewProperties::Size | KrViewProperties::Type | KrViewProperties::Modified | KrViewProperties::Permissions | KrViewProperties::KrPermissions | KrViewProperties::Owner | KrViewProperties::Group );
   
   MODE_OUT
   
   if ( parameter[0].lower() == "name" ) {
      mode |= KrViewProperties::Name;
   } else
   if ( parameter[0].lower() == "ext" ) {
      mode |= KrViewProperties::Ext;
   } else
   if ( parameter[0].lower() == "type" ) {
      mode |= KrViewProperties::Type;
   } else
   if ( parameter[0].lower() == "size" ) {
      mode |= KrViewProperties::Size;
   } else
   if ( parameter[0].lower() == "modified" ) {
      mode |= KrViewProperties::Modified;
   } else
   if ( parameter[0].lower() == "perms" ) {
      mode |= KrViewProperties::Permissions;
   } else
   if ( parameter[0].lower() == "rwx" ) {
      mode |= KrViewProperties::KrPermissions;
   } else
   if ( parameter[0].lower() == "owner" ) {
      mode |= KrViewProperties::Owner;
   } else
   if ( parameter[0].lower() == "group" ) {
      mode |= KrViewProperties::Group;
   } else {
      setError(exp, Error(Error::S_WARNING,Error::C_ARGUMENT,i18n("Expander: unknown column specified for %_ColSort(%1)%").arg(parameter[0]) ));
      return QString::null;
   }
   
   //MODE_OUT
   panel->view->setSortMode( (KrViewProperties::SortSpec)mode );
//   krOut << "end: exp_ColSort::expFunc" << endl;
   return QString::null;  // this doesn't return anything, that's normal!
}

exp_PanelSize::exp_PanelSize() {
   _expression = "PanelSize";
   _description = i18n("Set Relation Between the Panels...");
   _needPanel = true;
   
   addParameter( exp_parameter( i18n("Set the new size in percent:"), "__int:0;100;5;50", true ) );
}
TagString exp_PanelSize::expFunc( const ListPanel* panel, const QStringList& parameter, const bool&, Expander& exp ) const {
   NEED_PANEL
   int newSize;
   
   if ( parameter[0].isEmpty() )
      newSize = 50;	//default is 50%
   else
      newSize = parameter[0].toInt();
   
   if ( newSize < 0 || newSize > 100 ) {
      setError(exp, Error(Error::S_FATAL,Error::C_ARGUMENT,i18n("Expander: Value %1 out of range for %_PanelSize(percent)%. The first parameter has to be >0 and <100").arg(newSize)) );
      return QString::null;
   }

    QValueList<int> panelSizes = MAIN_VIEW->horiz_splitter->sizes();
    int totalSize = panelSizes[0] + panelSizes[1];
    
    if ( panel == LEFT_PANEL ) {
       panelSizes[0] = totalSize * newSize / 100;
       panelSizes[1] = totalSize * (100 - newSize) / 100;
    }
    else { // == RIGHT_PANEL
       panelSizes[0] = totalSize * (100 - newSize) / 100;
       panelSizes[1] = totalSize * newSize / 100;
    }
    
    MAIN_VIEW->horiz_splitter->setSizes( panelSizes );

   return QString::null;  // this doesn't return everything, that's normal!
}

#ifdef __KJSEMBED__
exp_Script::exp_Script() {
   _expression = "Script";
   _description = i18n("Execute a JavaScript Extension...");
   _needPanel = false;

   addParameter( exp_parameter( i18n("Location of the script"), "", true ) );
   addParameter( exp_parameter( i18n("Set some variables for the execution (optional).\ni.e. \"return=return_var;foo=bar\", consult the handbook for more information"), "", false ) );
}
TagString exp_Script::expFunc( const ListPanel*, const QStringList& parameter, const bool&, Expander& exp ) const {
   if ( parameter[0].isEmpty() ) {
      setError(exp, Error(Error::S_FATAL,Error::C_ARGUMENT,i18n("Expander: no script specified for %_Script(script)%")) );
      return QString::null;
   }

   QString filename = parameter[0];
   if ( filename.find('/') && KURL::isRelativeURL(filename) ) {
      // this return the local version of the file if this exists. else the global one is returnd
      filename = locate( "data", "krusader/js/"+filename );
   }

  if ( ! krJS )
      krJS = new KrJS();

   KJS::ExecState *exec = krJS->globalExec();

   QString jsReturn = QString::null;
   if ( parameter[1].lower() == "yes" )	// to stay compatible with the old-style parameter
      jsReturn = "cmd";
   else {
      QStringList jsVariables = QStringList::split( ';', parameter[1] );
      QString jsVariable, jsValue;
      for ( QStringList::Iterator it = jsVariables.begin(); it != jsVariables.end(); ++it ) {
         jsVariable = (*it).section('=', 0, 0).stripWhiteSpace();
         jsValue = (*it).section('=', 1);
         if ( jsVariable == "return" )
            jsReturn = jsValue.stripWhiteSpace();
         else
            krJS->putValue( jsVariable, KJSEmbed::convertToValue(exec, jsValue ) );
      }
   }

   krJS->runFile( filename );

   if ( ! jsReturn.isEmpty() )
      return krJS->getValue( jsReturn ).toString( krJS->globalExec() ).qstring();
   else
      return QString::null;
}
#endif

exp_View::exp_View() {
   _expression = "View";
   _description = i18n("View File with Krusader's Internal Viewer...");
   _needPanel = false;

   addParameter( exp_parameter( i18n("Which file to view (normally '%aCurrent%'):"), "__placeholder", true ) );
   addParameter( exp_parameter( i18n("Choose a view mode:"), "__choose:generic;text;hex", false ) );
   //addParameter( exp_parameter( i18n("Choose a window-mode"), "__choose:tab;window;panel", false ) );
   //TODO: window-mode 'panel' should open the file in the third-hand viewer
   addParameter( exp_parameter( i18n("Choose a window mode:"), "__choose:tab;window", false ) );
}
TagString exp_View::expFunc( const ListPanel*, const QStringList& parameter, const bool&, Expander& exp ) const {
   if ( parameter[0].isEmpty() ) {
			setError(exp, Error(Error::S_FATAL,Error::C_ARGUMENT,i18n("Expander: no file to view in %_View(filename)%")) );
      return QString::null;
   }

   QString viewMode, windowMode;
   if ( parameter.count() <= 1 || parameter[1].isEmpty() )
      viewMode = "generic";
   else
      viewMode = parameter[1];

   if ( parameter.count() <= 2 || parameter[2].isEmpty() )
      windowMode = "tab";
   else
      windowMode = parameter[2];

   KrViewer::Mode mode = KrViewer::Generic;
   if( viewMode == "text" ) mode = KrViewer::Text;
   else if( viewMode == "hex" ) mode = KrViewer::Hex;

	KrViewer::view(parameter[0],mode,(windowMode == "window"));
   //TODO: Call the viewer with viewMode and windowMode. Filename is in parameter[0].
   // It would be nice if parameter[0] could also be a space-separated filename-list (provided if the first parameter is %aList(selected)%)

   return QString::null;  // this doesn't return everything, that's normal!
}

/////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////// end of expander classes ////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////

TagString exp_simpleplaceholder::expFunc( const ListPanel* p, const TagStringList& parameter, const bool& useUrl, Expander& exp) const 
{
	QStringList lst;
	for(TagStringList::const_iterator it=parameter.begin(),end=parameter.end();it!=end;++it)
		if((*it).isSimple())
			lst.push_back((*it).string());
		else {
			setError(exp,Error(Error::S_FATAL,Error::C_SYNTAX,i18n("%Each% is not allowed in parameter to %1").arg(description())));
			return QString::null;
		}
	return expFunc(p,lst,useUrl,exp);
}

}

ListPanel* Expander::getPanel( const char panelIndicator, const exp_placeholder* pl, Expander& exp ) {
   switch ( panelIndicator ) {
   case 'a':
      return ACTIVE_PANEL;
   case 'o':
      return OTHER_PANEL;
   case 'l':
      return LEFT_PANEL;
   case 'r':
      return RIGHT_PANEL;
   case '_':
      return 0;
   default:
		 exp.setError(Error(Error::S_FATAL,Error::C_SYNTAX,i18n("Expander: Bad panel specifier %1 in placeholder %2").arg(panelIndicator).arg(pl->description())));
      return 0;
   }
}

void Expander::expand( const QString& stringToExpand, bool useUrl ) {
   TagString result = expandCurrent( stringToExpand, useUrl );
   if ( error() )
      return;
   
   if ( !result.isSimple() )
      resultList = splitEach( result );
   else
      resultList.append( result.string() );

//    krOut << resultList[0] << endl;
}

TagString Expander::expandCurrent( const QString& stringToExpand, bool useUrl ) {
   TagString result;
	 QString exp = QString::null;
   TagString tmpResult;
   int begin, end, i;
//    int brackets = 0;
//    bool inQuotes = false;
   unsigned int idx = 0;
   while ( idx < stringToExpand.length() ) {
      if ( ( begin = stringToExpand.find( '%', idx ) ) == -1 ) break;
      if ( ( end = findEnd( stringToExpand, begin ) ) == -1 ) {
         setError(Error(Error::S_FATAL,Error::C_SYNTAX,i18n("Error: unterminated % in Expander::expandCurrent")) );
         return QString::null;
      }

      result += stringToExpand.mid( idx, begin - idx ); // copy until the start of %exp%

      // get the expression, and expand it using the correct expander function
      exp = stringToExpand.mid( begin + 1, end - begin - 1 );
//       kdDebug() << "------------- exp: '" << exp << "'" << endl;
      if ( exp == "" )
        result += QString(QChar('%'));
      else {
        TagStringList parameter = separateParameter( &exp, useUrl );
        if ( error() )
           return QString::null;
        char panelIndicator = exp.lower()[0].latin1();
        exp.replace( 0, 1, "" );
        for ( i = 0; i < placeholderCount(); ++i )
           if ( exp == placeholder( i )->expression() ) {
//               kdDebug() << "---------------------------------------" << endl;
              tmpResult = placeholder( i )->expFunc( getPanel( panelIndicator,placeholder(i),*this ), parameter, useUrl, *this );
              if ( error() ) {
                 return QString::null;
              }
              else
                 result += tmpResult;
//               kdDebug() << "---------------------------------------" << endl;
              break;
           }
         if ( i == placeholderCount() ) { // didn't find an expander
            setError(Error(Error::S_FATAL,Error::C_SYNTAX,i18n("Error: unrecognized %%%1%2%% in Expander::expand").arg(panelIndicator).arg(exp)) );
           return QString::null;
         }
      } //else
      idx = end + 1;
   }
   // copy the rest of the string
   result += stringToExpand.mid( idx );
//    kdDebug() << "============== result '" << result << "'" << endl;
   return result;
}

QStringList Expander::splitEach( TagString stringToSplit ) {
	if(stringToSplit.isSimple()) {
// 		krOut << stringToSplit.string() << endl;
		return stringToSplit.string();
	}
	pair<uint,QStringList> pl=*stringToSplit.tagsBegin();
	stringToSplit.eraseTag(stringToSplit.tagsBegin());
	QStringList ret;
	for(QStringList::const_iterator it=pl.second.begin(),end=pl.second.end();it!=end;++it) {
		TagString s=stringToSplit;
		s.insert(pl.first,*it);
		ret+=splitEach(s);
         }
	return ret;
//    kdDebug() << "stringToSplit: " << stringToSplit << endl;
}

TagStringList Expander::separateParameter( QString* const exp, bool useUrl ) {
   TagStringList parameter;
   QStringList parameter1;
   QString result;
   int begin, end;
   if ( ( begin = exp->find( '(' ) ) != -1 ) {
      if ( ( end = exp->findRev( ')' ) ) == -1 ) {
         setError(Error(Error::S_FATAL,Error::C_SYNTAX,i18n("Error: missing ')' in Expander::separateParameter") ));
         return TagStringList();
      }
      result = exp->mid( begin + 1, end - begin - 1 );
      *exp = exp->left( begin );
   
      bool inQuotes = false;
      unsigned int idx = 0;
      begin = 0;
      while ( idx < result.length() ) {
         if ( result[ idx ].latin1() == '\\' ) {
            if ( result[ idx+1 ].latin1() == '"')
               result.replace( idx, 1, "" );
         }
         if ( result[ idx ].latin1() == '"' )
            inQuotes = !inQuotes;
         if ( result[ idx ].latin1() == ',' && !inQuotes ) {
            parameter1.append( result.mid( begin, idx - begin) );
            begin = idx + 1;
//             krOut << " ---- parameter: " << parameter.join(";") << endl;
         }
         idx++;
      }
      parameter1.append( result.mid( begin, idx - begin) );  //don't forget the last one
      
      for (QStringList::Iterator it = parameter1.begin(); it != parameter1.end(); ++it) {
         *it = (*it).stripWhiteSpace();
         if ( (*it).left(1) == "\"" )
            *it = (*it).mid(1, (*it).length() - 2 );
         parameter.push_back(expandCurrent( *it, useUrl ));
         if ( error() )
            return TagStringList();
      }
   }
      
//    krOut << "------- exp: " << *exp << " ---- parameter: " << parameter.join(";") << endl;
   return parameter;
}

int Expander::findEnd( const QString& str, int start ) {
   int end = str.find( '%', start + 1 );
   if ( end == -1 )
      return end;
   int bracket = str.find( '(', start + 1 );
   if ( end < bracket || bracket == -1 )
      return end;
      
   unsigned int idx = bracket+1;
   bool inQuotes = false;
   int depth=1;
   while ( idx < str.length() ) {
      switch (str[ idx ].latin1()) {
      case '\\':
         idx ++;
         break;
      case '"':
         inQuotes = !inQuotes;
         break;
      case '(':
         if(!inQuotes)
            depth++;
         break;
      case ')':
         if(!inQuotes)
            --depth;
         break;
      case '%':
         if(depth==0)
            return idx;
      } //switch
      idx++;
   } //while
   // failsafe
   return -1;
}