filelist.cpp

LINUX下

/*
 * btg Copyright (C) 2005 Michael Wojciechowski.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * $Id: filelist.cpp,v 1.1.4.6 2007/09/17 15:34:50 wojci Exp $
 */

#include "filelist.h"

#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/exception.hpp>

#include <algorithm>
#include <cctype>

#include "helpwindow.h"

namespace btg
{
   namespace UI
   {
      namespace cli
      {
         bool filename_compare(boost::filesystem::path const& _p1,
                               boost::filesystem::path const& _p2);

         namespace fs = boost::filesystem;

         fileList::fileList(keyMapping const& _kmap, 
                            windowSize const& _ws,
                            std::string const& _directory)
            : baseWindow(_kmap),
              size_(_ws),
              currentDirectory_(_directory),
              currentFile_(),
              numberOfLines_(0),
              positionWindowStart_(0),
              positionWindowEnd_(0),
              currentPosition_(0)
         {
            if (currentDirectory_.size() == 0)
               {
                  currentDirectory_ = fs::initial_path().string();
               }
         }

         dialog::RESULT fileList::run()
         {
            init(size_);

            getDirectory();

            refresh();

            // Handle keyboard.

            keyMapping::KEYLABEL label = keyMapping::K_UNDEF;
            t_uint               key   = 0;
            bool                 cont  = true;

            while (cont)
               {
                  key = readAnyKey();
                  if (!handleKeyboard(key, label))
                     {
                        // Got something that is not recognized as one of
                        // the keys that are used.
                        // 
                        // Use this information to move to the position
                        // in the list of files which begins with this
                        // character.

                        moveTo(key);
                        continue;
                     }

                  switch (label)
                     {
                     case keyMapping::K_HELP:
                        {
                           if (showHelp() == dialog::R_RESIZE)
                              {
                                 // Resized window.
                                 return dialog::R_RESIZE;
                              }
                           break;
                        }
                     case keyMapping::K_QUIT:
                        {
                           cont = false;
                           break;
                        }
                     case keyMapping::K_DOWN:
                        {
                           moveDown();
                           refresh();
                           break;
                        }
                     case keyMapping::K_UP:
                        {
                           moveUp();
                           refresh();
                           break;
                        }
                     case keyMapping::K_LIST_START:
                        {
                           toStart();
                           refresh();
                           break;
                        }
                     case keyMapping::K_LIST_END:
                        {
                           toEnd();
                           refresh();
                           break;
                        }
                     case keyMapping::K_SELECT:
                        {
                           fs::path p;
                           if (getSelection(p))
                              {
                                 if (p.string() == "")
                                    {
                                       break;
                                    }

                                 if (fs::is_directory(p))
                                    {
                                       // check here, that the
                                       // selected directory is valid.
                                       //
                                       // It seems that when using
                                       // directories with + in them,
                                       // an exception is thrown.
                                       try
                                          {
                                             fs::path fpath(p.string());
                                          }
                                       catch (...)
                                          {
                                             break;
                                          }

                                       currentDirectory_ = p.string();

                                       getDirectory();

                                       currentPosition_     = 0;
                                       positionWindowEnd_   = 0;
                                       positionWindowStart_ = 0;

                                       refresh();
                                    }
                                 else
                                    {
                                       // A file was selected.
                                       currentFile_ = p.string();
                                       cont         = false;
                                    }
                              }

                           // A file or directory was selected.
                           // Find out which one.
                           break;
                        }
                     case keyMapping::K_RESIZE:
                        {
                           // Close this window, and make the parent
                           // resize its window.
                           return dialog::R_RESIZE;
                           break;
                        }
                     default:
                        {
                           refresh();
                           break;
                        }
                     }
               }

            return dialog::R_QUIT;
         }

         std::string fileList::getLastDirectory() const
         {
            return currentDirectory_;
         }

         bool fileList::getFile(std::string & _file) const
         {
            bool status = false;

            if (currentFile_.size() > 0)
               {
                  _file  = currentFile_;
                  status = true;
               }

            return status;
         }

         bool fileList::init(windowSize const& _ws)
         {
            bool status = baseWindow::init(_ws);

            if (status)
               {
                  numberOfLines_  = _ws.height-1;
               }

            return status;
         }

         void fileList::resize(windowSize const& _ws)
         {

         }

         bool fileList::destroy()
         {
            if (window_ != 0)
               {
                  delwin(window_);
                  window_ = 0;
               }

            return true;
         }

         void fileList::refresh()
         {
            if (window_ == 0)
               {
                  return;
               }

            clear();
            drawList();
            wrefresh(window_);
         }

         void fileList::fillIterator(std::vector<fs::path>::const_iterator & _startIter,
                                     std::vector<fs::path>::const_iterator & _endIter)
         {
            if (positionWindowEnd_ == 0)
               {
                  positionWindowEnd_ = numberOfLines_;
               }
	  
            if (positionWindowEnd_ > static_cast<t_int>(entries_.size()))
               {
                  positionWindowEnd_ = entries_.size();
               }
	  
            // Move the iterator the the start of the window to display.
            for (t_int counter = 0;
                 counter < positionWindowStart_;
                 counter++)
               {
                  _startIter++;
               }
	  
            // Move the iterator the the end of the window to display.
            for (t_int counter = 0;
                 counter < positionWindowEnd_;
                 counter++)
               {
                  _endIter++;
               }
         }

         void fileList::drawList()
         {
            std::vector<fs::path>::const_iterator iterBeg = entries_.begin();
            std::vector<fs::path>::const_iterator iterEnd = entries_.begin();

            fillIterator(iterBeg, iterEnd);

            // Display the window.
            t_int counter = 0;
            std::vector<fs::path>::const_iterator iter;
            for (iter = iterBeg;
                 iter != iterEnd;
                 iter++)
               {
                  fs::path p = *iter;

                  std::string filename = p.leaf();

                  bool isDirectory = false;

                  try
                     {
                        if (fs::is_directory(p))
                           {
                              isDirectory = true;
                           }
                     }
                  catch(...)
                     {
                        isDirectory = false;
                     }

                  if (counter == currentPosition_)
                     {
                        ::wattron(window_, A_REVERSE);

                        std::string spacestr;
                        t_int spaces = width_ - filename.size() - 1 /* extra space is inserted at
                                                                     * the beginning of the line.
                                                                     */;
                        if (spaces > 0)
                           {
                              for (t_int spacecounter = 0;
                                   spacecounter < spaces;