todo.cc

   1 // This file is part of a terminal todo application.
   2 //
   3 // Copyright (C) 2006 by Mike Sharov <msharov@users.sourceforge.net>
   4 // This file is free software, distributed under the MIT License.
   5 //
   6 // todo.cc
   7 //
   8
   9 #include "todo.h"
  10 #include "frame.h"
  11 #include <unistd.h>
  12
  13 //----------------------------------------------------------------------
  14
  15 /// Default constructor.
  16 CTodoApp::CTodoApp (void)
  17 : CApplication (),
  18   m_Doc (),
  19   m_Curlist ()
  20 {
  21 }
  22
  23 /// Singleton interface.
  24 /*static*/ CTodoApp& CTodoApp::Instance (void)
  25 {
  26     static CTodoApp s_App;
  27     return (s_App);
  28 }
  29
  30 /// Set \p filename to a default value to be used when none is given on the cmdline.
  31 void CTodoApp::GetDefaultFilename (string& filename) const
  32 {
  33     filename.clear();
  34     //
  35     // This code gets the first available .todo in the current path.
  36     //  That is, it will use ./.todo, or ../.todo, etc.
  37     //
  38     // Get the nesting level to know how far back to check.
  39     char cwd [PATH_MAX];
  40     if (!getcwd (VectorBlock (cwd)))
  41         throw libc_exception ("getcwd");
  42     const size_t nDirs = count (cwd, cwd + strlen(cwd), '/');
  43     assert (nDirs && "A path without root in it?");
  44
  45     // Check for existing .todo in each directory.
  46     filename.reserve (strlen("../") * nDirs + strlen(".todo"));
  47     int i;
  48     for (i = 0; i < int(nDirs); ++i)
  49         filename += "../";
  50     filename += ".todo";
  51     for (; i >= 0; --i)
  52         if (access (filename.iat (i * strlen("../")), F_OK) == 0)
  53             break;
  54
  55     // If there are no .todo files, create ./.todo
  56     if (i < 0) {
  57         i = nDirs - 1;
  58         if (access (".", W_OK) != 0) {
  59             MessageBox ("You are not allowed to write to this directory");
  60             CRootWindow::Instance().Close();
  61         }
  62     }
  63     filename.erase (filename.begin(), i * strlen("../"));
  64 }
  65
  66 /// Initializes the output device.
  67 void CTodoApp::OnCreate (argc_t argc, argv_t argv)
  68 {
  69     CApplication::OnCreate (argc, argv);
  70     if (argc > 2) {
  71         cerr << "Usage: todo [filename]\n";
  72         return (CRootWindow::Instance().Close());
  73     }
  74
  75     // Determine database name.
  76     string fullname;
  77     if (argc == 2)
  78         fullname = argv[1];
  79     else
  80         GetDefaultFilename (fullname);
  81
  82     // Create the frame and register the document with it.
  83     CTodoFrame* pFrame = new CTodoFrame;
  84     CRootWindow::Instance().AddChild (pFrame);
  85     m_Doc.RegisterView (&m_Curlist);
  86     m_Curlist.RegisterView (pFrame);
  87
  88     // Open the document.
  89     try {
  90         m_Doc.Open (fullname);
  91     } catch (...) {
  92         string msg (fullname);
  93         msg += " is corrupt or in an incompatible format.";
  94         MessageBox (msg);
  95         CRootWindow::Instance().Close();
  96         #ifndef NDEBUG
  97             throw; // to see the real error for debugging.
  98         #endif
  99     }
 100 }
 101
 102 //----------------------------------------------------------------------
 103
 104 WinMain (CTodoApp)
 105
 106 //----------------------------------------------------------------------
 107