tools/RemoteFileBrowser/QMachineBrowser.cxx

   1 // Copyright (C) 2017-2022  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19 // Author : Anthony GEAY (EDF R&D)
  20
  21 #include "QMachineBrowser.h"
  22 #include "QRemoteFileBrowser.h"
  23
  24 #include "QDir"
  25 #include "QFileInfo"
  26 #include "QVBoxLayout"
  27 #include "QPushButton"
  28 #include "QMessageBox"
  29 #include "QInputDialog"
  30 #include "QXmlStreamReader"
  31 #include "QProcessEnvironment"
  32
  33 #include <iostream>
  34
  35 constexpr const char localhost[]="localhost";
  36
  37 QMachineSelector::QMachineSelector(QWidget *parent):QComboBox(parent)
  38 {
  39   this->fillMachines();
  40 }
  41
  42 void QMachineSelector::initLocation()
  43 {
  44   this->assignToLocalhost();
  45 }
  46
  47 void QMachineSelector::fillMachines()
  48 {
  49   this->fillMachinesFromCatalog();
  50   this->fillMachinesFromSettings();
  51 }
  52
  53 void QMachineSelector::appendEntry(const QString& entry)
  54 {
  55   for(int i=0;i<this->count();i++)
  56     {
  57       if(this->itemText(i)==entry)
  58         return ;
  59     }
  60   this->insertItem(this->count(),entry);
  61   this->setCurrentIndex(this->count()-1);
  62 }
  63
  64 void QMachineSelector::fillMachinesFromCatalog()
  65 {
  66   constexpr const char APPLI[]="APPLI";
  67   constexpr const char RESOURCES[]="CatalogResources.xml";
  68   if(!QProcessEnvironment::systemEnvironment().contains(APPLI))
  69     return ;
  70   QString appli(QProcessEnvironment::systemEnvironment().value(APPLI));
  71   QFileInfo fi(QDir::homePath(),appli);
  72   if(!(fi.exists() && fi.isDir()))
  73     return ;
  74   QFileInfo fi2(QDir(fi.canonicalFilePath()),QString(RESOURCES));
  75   if(!(fi2.exists() && fi2.isFile()))
  76     return ;
  77   QFile file(fi2.canonicalFilePath());
  78   if(!file.open(QFile::ReadOnly | QFile::Text))
  79     {
  80       return ;
  81     }
  82   QXmlStreamReader reader;
  83   reader.setDevice(&file);
  84   reader.readNext();
  85   while(!reader.atEnd())
  86     {
  87       if(reader.isStartElement())
  88         {
  89           if(reader.name()=="machine")
  90             {
  91               foreach(const QXmlStreamAttribute &attr, reader.attributes())
  92                 {
  93                   if(attr.name().toString()==QLatin1String("name"))
  94                     {
  95                       this->insertItem(this->count(),attr.value().toString());
  96                     }
  97                 }
  98             }
  99           reader.readNext();
 100         }
 101       else
 102         reader.readNext();
 103     }
 104 }
 105
 106 void QMachineSelector::assignToLocalhost()
 107 {
 108   int i(0);
 109   for(;i<this->count();i++)
 110     if(this->itemText(i)==localhost)
 111       break ;
 112   if(i==this->count())
 113     {
 114       this->insertItem(this->count(),QString(localhost));
 115       this->setCurrentIndex(this->count()-1);
 116     }
 117   else
 118     this->setCurrentIndex(i);
 119 }
 120
 121 void QMachineSelector::fillMachinesFromSettings()
 122 {
 123 }
 124
 125 QMachineManager::QMachineManager(QWidget *parent):QWidget(parent),_pb(nullptr),_ms(nullptr)
 126 {
 127   QHBoxLayout *lay(new QHBoxLayout(this));
 128   _pb=new QPushButton(this);
 129   _pb->setText("Add");
 130   _pb->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed);
 131   lay->addWidget(_pb);
 132   _ms=new QMachineSelector(this);
 133   lay->addWidget(_ms);
 134   connect(_pb,SIGNAL(clicked()),this,SLOT(newEntryRequested()));
 135 }
 136
 137 void QMachineManager::initLocation()
 138 {
 139   _ms->initLocation();
 140 }
 141
 142 QString QMachineManager::getSelectedHost() const
 143 {
 144   return _ms->currentText();
 145 }
 146
 147 void QMachineManager::newEntryRequested()
 148 {
 149   constexpr int timeEllapse=3000;
 150   bool isOK(false);
 151   QString newEntry(QInputDialog::getItem(this,"Append new host","Hostname",QStringList(),/*current*/0,/*editable*/true,&isOK,Qt::Tool));
 152   if(!isOK)
 153     return ;
 154   {
 155     QProcess proc;
 156     {
 157       QStringList st(newEntry);
 158       st << "-c" << "1" << "-w" << QString::number(timeEllapse/1000);//attempt to send one packet within timeEllapse ms
 159       proc.start("ping",st);
 160     }
 161     if(proc.waitForFinished(-1))
 162       {
 163         if(proc.exitCode()!=0)
 164           {
 165             QMessageBox::information(this,"Information",QString("host %1 ping failed !").arg(newEntry));
 166             return ;
 167           }
 168       }
 169     else
 170       {
 171         QMessageBox::information(this,"Information",QString("host %1 ping failed !").arg(newEntry));
 172         return ;
 173       }
 174   }
 175   _ms->appendEntry(newEntry);
 176 }
 177
 178 QMachineBrowser::QMachineBrowser(QWidget *parent):QWidget(parent),_msel(nullptr),_le(nullptr)
 179 {
 180   QVBoxLayout *lay(new QVBoxLayout(this));
 181   _msel=new QMachineManager(this);
 182   _le=new QLineEdit(this);
 183   lay->addWidget(_msel);
 184   lay->addWidget(_le);
 185   connect(_le,SIGNAL(returnPressed()),this,SIGNAL(locationChanged()));
 186 }
 187
 188 void QMachineBrowser::initLocation()
 189 {
 190   _msel->initLocation();
 191   _le->setText(QDir::currentPath());
 192   emit this->locationChanged();
 193 }
 194
 195 QRemoteFileSystemModel *QMachineBrowser::generateModel()
 196 {
 197   FileLoader *fl(this->generateFileLoader());
 198   return new QRemoteFileSystemModel(this,fl);
 199 }
 200
 201 FileLoader *QMachineBrowser::generateFileLoader()
 202 {
 203   FileLoader *fl(nullptr);
 204   QString host(_msel->getSelectedHost());
 205   if(host==localhost)
 206     fl=new LocalFileLoader(_le->text());
 207   else
 208     fl=new RemoteFileLoader(host,_le->text());
 209   return fl;
 210 }