browser.c

mutt-1.5.12 源代码。linux 下邮件接受的工具。

/*
 * Copyright (C) 1996-2000 Michael R. Elkins <[e-mail]>
 * 
 *     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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */ 

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include "mutt.h"
#include "mutt_curses.h"
#include "mutt_menu.h"
#include "attach.h"
#include "buffy.h"
#include "mapping.h"
#include "sort.h"
#include "mailbox.h"
#include "browser.h"
#ifdef USE_IMAP
#include "imap.h"
#endif

#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/stat.h>
#include <errno.h>

static struct mapping_t FolderHelp[] = {
  { N_("Exit"),  OP_EXIT },
  { N_("Chdir"), OP_CHANGE_DIRECTORY },
  { N_("Mask"),  OP_ENTER_MASK },
  { N_("Help"),  OP_HELP },
  { NULL }
};

typedef struct folder_t
{
  struct folder_file *ff;
  int num;
} FOLDER;

static char LastDir[_POSIX_PATH_MAX] = "";
static char LastDirBackup[_POSIX_PATH_MAX] = "";

/* Frees up the memory allocated for the local-global variables.  */
static void destroy_state (struct browser_state *state)
{
  int c;

  for (c = 0; c < state->entrylen; c++)
  {
    FREE (&((state->entry)[c].name));
    FREE (&((state->entry)[c].desc));
    FREE (&((state->entry)[c].st));
  }
#ifdef USE_IMAP
  FREE (&state->folder);
#endif
  FREE (&state->entry);
}

static int browser_compare_subject (const void *a, const void *b)
{
  struct folder_file *pa = (struct folder_file *) a;
  struct folder_file *pb = (struct folder_file *) b;

  int r = mutt_strcoll (pa->name, pb->name);

  return ((BrowserSort & SORT_REVERSE) ? -r : r);
}

static int browser_compare_date (const void *a, const void *b)
{
  struct folder_file *pa = (struct folder_file *) a;
  struct folder_file *pb = (struct folder_file *) b;

  int r = pa->mtime - pb->mtime;

  return ((BrowserSort & SORT_REVERSE) ? -r : r);
}

static int browser_compare_size (const void *a, const void *b)
{
  struct folder_file *pa = (struct folder_file *) a;
  struct folder_file *pb = (struct folder_file *) b;

  int r = pa->size - pb->size;

  return ((BrowserSort & SORT_REVERSE) ? -r : r);
}

static void browser_sort (struct browser_state *state)
{
  int (*f) (const void *, const void *);

  switch (BrowserSort & SORT_MASK)
  {
    case SORT_ORDER:
      return;
    case SORT_DATE:
      f = browser_compare_date;
      break;
    case SORT_SIZE:
      f = browser_compare_size;
      break;
    case SORT_SUBJECT:
    default:
      f = browser_compare_subject;
      break;
  }
  qsort (state->entry, state->entrylen, sizeof (struct folder_file), f);
}

static int link_is_dir (const char *folder, const char *path)
{
  struct stat st;
  char fullpath[_POSIX_PATH_MAX];
  
  mutt_concat_path (fullpath, folder, path, sizeof (fullpath));
  
  if (stat (fullpath, &st) == 0)
    return (S_ISDIR (st.st_mode));
  else
    return 0;
}

static const char *
folder_format_str (char *dest, size_t destlen, char op, const char *src,
		   const char *fmt, const char *ifstring, const char *elsestring,
		   unsigned long data, format_flag flags)
{
  char fn[SHORT_STRING], tmp[SHORT_STRING], permission[11];
  char date[16], *t_fmt;
  time_t tnow;
  FOLDER *folder = (FOLDER *) data;
  struct passwd *pw;
  struct group *gr;
  int optional = (flags & M_FORMAT_OPTIONAL);

  switch (op)
  {
    case 'C':
      snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
      snprintf (dest, destlen, tmp, folder->num + 1);
      break;
      
    case 'd':
      if (folder->ff->st != NULL)
      {
	tnow = time (NULL);
	t_fmt = tnow - folder->ff->st->st_mtime < 31536000 ? "%b %d %H:%M" : "%b %d  %Y";
	strftime (date, sizeof (date), t_fmt, localtime (&folder->ff->st->st_mtime));
	mutt_format_s (dest, destlen, fmt, date);
      }
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    case 'f':
    {
      char *s;
#ifdef USE_IMAP
      if (folder->ff->imap)
	s = NONULL (folder->ff->desc);
      else
#endif
	s = NONULL (folder->ff->name);

      snprintf (fn, sizeof (fn), "%s%s", s,
		folder->ff->st ? (S_ISLNK (folder->ff->st->st_mode) ? "@" :		
				  (S_ISDIR (folder->ff->st->st_mode) ? "/" : 
				   ((folder->ff->st->st_mode & S_IXUSR) != 0 ? "*" : ""))) : "");
      
      mutt_format_s (dest, destlen, fmt, fn);
      break;
    }
    case 'F':
      if (folder->ff->st != NULL)
      {
	snprintf (permission, sizeof (permission), "%c%c%c%c%c%c%c%c%c%c",
		  S_ISDIR(folder->ff->st->st_mode) ? 'd' : (S_ISLNK(folder->ff->st->st_mode) ? 'l' : '-'),
		  (folder->ff->st->st_mode & S_IRUSR) != 0 ? 'r': '-',
		  (folder->ff->st->st_mode & S_IWUSR) != 0 ? 'w' : '-',
		  (folder->ff->st->st_mode & S_ISUID) != 0 ? 's' : (folder->ff->st->st_mode & S_IXUSR) != 0 ? 'x': '-',
		  (folder->ff->st->st_mode & S_IRGRP) != 0 ? 'r' : '-',
		  (folder->ff->st->st_mode & S_IWGRP) != 0 ? 'w' : '-',
		  (folder->ff->st->st_mode & S_ISGID) != 0 ? 's' : (folder->ff->st->st_mode & S_IXGRP) != 0 ? 'x': '-',
		  (folder->ff->st->st_mode & S_IROTH) != 0 ? 'r' : '-',
		  (folder->ff->st->st_mode & S_IWOTH) != 0 ? 'w' : '-',
		  (folder->ff->st->st_mode & S_ISVTX) != 0 ? 't' : (folder->ff->st->st_mode & S_IXOTH) != 0 ? 'x': '-');
	mutt_format_s (dest, destlen, fmt, permission);
      }
#ifdef USE_IMAP
      else if (folder->ff->imap)
      {
	/* mark folders with subfolders AND mail */
	snprintf (permission, sizeof (permission), "IMAP %c",
		  (folder->ff->inferiors && folder->ff->selectable) ? '+' : ' ');
	mutt_format_s (dest, destlen, fmt, permission);
      }                                        
#endif
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    case 'g':
      if (folder->ff->st != NULL)
      {
	if ((gr = getgrgid (folder->ff->st->st_gid)))
	  mutt_format_s (dest, destlen, fmt, gr->gr_name);
	else
	{
	  snprintf (tmp, sizeof (tmp), "%%%sld", fmt);
	  snprintf (dest, destlen, tmp, folder->ff->st->st_gid);
	}
      }
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    case 'l':
      if (folder->ff->st != NULL)
      {
	snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
	snprintf (dest, destlen, tmp, folder->ff->st->st_nlink);
      }
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    case 'N':
#ifdef USE_IMAP
      if (mx_is_imap (folder->ff->desc))
      {
	if (!optional)
	{
	  snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
	  snprintf (dest, destlen, tmp, folder->ff->new);
	}
	else if (!folder->ff->new)
	  optional = 0;
	break;
      }
#endif
      snprintf (tmp, sizeof (tmp), "%%%sc", fmt);
      snprintf (dest, destlen, tmp, folder->ff->new ? 'N' : ' ');
      break;
      
    case 's':
      if (folder->ff->st != NULL)
      {
	snprintf (tmp, sizeof (tmp), "%%%sld", fmt);
	snprintf (dest, destlen, tmp, (long) folder->ff->st->st_size);
      }
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    case 't':
      snprintf (tmp, sizeof (tmp), "%%%sc", fmt);
      snprintf (dest, destlen, tmp, folder->ff->tagged ? '*' : ' ');
      break;
      
    case 'u':
      if (folder->ff->st != NULL)
      {
	if ((pw = getpwuid (folder->ff->st->st_uid)))
	  mutt_format_s (dest, destlen, fmt, pw->pw_name);
	else
	{
	  snprintf (tmp, sizeof (tmp), "%%%sld", fmt);
	  snprintf (dest, destlen, tmp, folder->ff->st->st_uid);
	}
      }
      else
	mutt_format_s (dest, destlen, fmt, "");
      break;
      
    default:
      snprintf (tmp, sizeof (tmp), "%%%sc", fmt);
      snprintf (dest, destlen, tmp, op);
      break;
  }

  if (optional)
    mutt_FormatString (dest, destlen, ifstring, folder_format_str, data, 0);
  else if (flags & M_FORMAT_OPTIONAL)
    mutt_FormatString (dest, destlen, elsestring, folder_format_str, data, 0);

  return (src);
}

static void add_folder (MUTTMENU *m, struct browser_state *state,
			const char *name, const struct stat *s, int new)
{
  if (state->entrylen == state->entrymax)
  {
    /* need to allocate more space */
    safe_realloc (&state->entry,
		  sizeof (struct folder_file) * (state->entrymax += 256));
    memset (&state->entry[state->entrylen], 0,
	    sizeof (struct folder_file) * 256);
    if (m)
      m->data = state->entry;
  }

  if (s != NULL)
  {
    (state->entry)[state->entrylen].mode = s->st_mode;
    (state->entry)[state->entrylen].mtime = s->st_mtime;
    (state->entry)[state->entrylen].size = s->st_size;
    
    (state->entry)[state->entrylen].st = safe_malloc (sizeof (struct stat));
    memcpy ((state->entry)[state->entrylen].st, s, sizeof (struct stat));
  }

  (state->entry)[state->entrylen].new = new;
  (state->entry)[state->entrylen].name = safe_strdup (name);
  (state->entry)[state->entrylen].desc = safe_strdup (name);
#ifdef USE_IMAP
  (state->entry)[state->entrylen].imap = 0;
#endif
  (state->entrylen)++;
}

static void init_state (struct browser_state *state, MUTTMENU *menu)
{
  state->entrylen = 0;
  state->entrymax = 256;
  state->entry = (struct folder_file *) safe_calloc (state->entrymax, sizeof (struct folder_file));
#ifdef USE_IMAP
  state->imap_browse = 0;
#endif
  if (menu)
    menu->data = state->entry;
}

static int examine_directory (MUTTMENU *menu, struct browser_state *state,
			      char *d, const char *prefix)
{
  struct stat s;
  DIR *dp;
  struct dirent *de;
  char buffer[_POSIX_PATH_MAX + SHORT_STRING];
  BUFFY *tmp;

  while (stat (d, &s) == -1)
  {
    if (errno == ENOENT)
    {
      /* The last used directory is deleted, try to use the parent dir. */
      char *c = strrchr (d, '/');

      if (c && (c > d))
      {
	*c = 0;
	continue;
      }
    }
    mutt_perror (d);
    return (-1);
  }

  if (!S_ISDIR (s.st_mode))
  {
    mutt_error (_("%s is not a directory."), d);
    return (-1);
  }

  mutt_buffy_check (0);

  if ((dp = opendir (d)) == NULL)
  {
    mutt_perror (d);
    return (-1);
  }

  init_state (state, menu);

  while ((de = readdir (dp)) != NULL)
  {
    if (mutt_strcmp (de->d_name, ".") == 0)
      continue;    /* we don't need . */
    
    if (prefix && *prefix && mutt_strncmp (prefix, de->d_name, mutt_strlen (prefix)) != 0)
      continue;
    if (!((regexec (Mask.rx, de->d_name, 0, NULL, 0) == 0) ^ Mask.not))
      continue;

    mutt_concat_path (buffer, d, de->d_name, sizeof (buffer));
    if (lstat (buffer, &s) == -1)
      continue;
    
    if ((! S_ISREG (s.st_mode)) && (! S_ISDIR (s.st_mode)) &&
	(! S_ISLNK (s.st_mode)))
      continue;
    
    tmp = Incoming;
    while (tmp && mutt_strcmp (buffer, tmp->path))
      tmp = tmp->next;
    add_folder (menu, state, de->d_name, &s, (tmp) ? tmp->new : 0);
  }
  closedir (dp);  
  browser_sort (state);
  return 0;
}

static int examine_mailboxes (MUTTMENU *menu, struct browser_state *state)
{
  struct stat s;
  char buffer[LONG_STRING];
  BUFFY *tmp = Incoming;

  if (!Incoming)
    return (-1);
  mutt_buffy_check (0);

  init_state (state, menu);

  do
  {
#ifdef USE_IMAP
    if (mx_is_imap (tmp->path))
    {
      add_folder (menu, state, tmp->path, NULL, tmp->new);
      continue;
    }
#endif
#ifdef USE_POP
    if (mx_is_pop (tmp->path))
    {
      add_folder (menu, state, tmp->path, NULL, tmp->new);
      continue;
    }
#endif
    if (lstat (tmp->path, &s) == -1)
      continue;

    if ((! S_ISREG (s.st_mode)) && (! S_ISDIR (s.st_mode)) &&
	(! S_ISLNK (s.st_mode)))
      continue;
    
    strfcpy (buffer, NONULL(tmp->path), sizeof (buffer));
    mutt_pretty_mailbox (buffer);

    add_folder (menu, state, buffer, &s, tmp->new);
  }
  while ((tmp = tmp->next));
  browser_sort (state);
  return 0;
}

static int select_file_search (MUTTMENU *menu, regex_t *re, int n)
{
  return (regexec (re, ((struct folder_file *) menu->data)[n].name, 0, NULL, 0));
}

static void folder_entry (char *s, size_t slen, MUTTMENU *menu, int num)
{
  FOLDER folder;

  folder.ff = &((struct folder_file *) menu->data)[num];
  folder.num = num;
  
  mutt_FormatString (s, slen, NONULL(FolderFormat), folder_format_str, 
      (unsigned long) &folder, M_FORMAT_ARROWCURSOR);
}

static void init_menu (struct browser_state *state, MUTTMENU *menu, char *title,
		       size_t titlelen, int buffy)
{
  char path[_POSIX_PATH_MAX];

  menu->max = state->entrylen;

  if(menu->current >= menu->max)
    menu->current = menu->max - 1;
  if (menu->current < 0)
    menu->current = 0;
  if (menu->top > menu->current)
    menu->top = 0;

  menu->tagged = 0;
  
  if (buffy)
    snprintf (title, titlelen, _("Mailboxes [%d]"), mutt_buffy_check (0));
  else
  {
    strfcpy (path, LastDir, sizeof (path));
    mutt_pretty_mailbox (path);
#ifdef USE_IMAP
  if (state->imap_browse && option (OPTIMAPLSUB))
    snprintf (title, titlelen, _("Subscribed [%s], File mask: %s"),
	      path, NONULL (Mask.pattern));
  else
#endif
    snprintf (title, titlelen, _("Directory [%s], File mask: %s"),
	      path, NONULL(Mask.pattern));
  }
  menu->redraw = REDRAW_FULL;
}

static int file_tag (MUTTMENU *menu, int n, int m)
{
  struct folder_file *ff = &(((struct folder_file *)menu->data)[n]);
  int ot;
  if (S_ISDIR (ff->mode) || (S_ISLNK (ff->mode) && link_is_dir (LastDir, ff->name)))
  {
    mutt_error _("Can't attach a directory!");
    return 0;
  }
  
  ot = ff->tagged;
  ff->tagged = (m >= 0 ? m : !ff->tagged);
  
  return ff->tagged - ot;
}

void _mutt_select_file (char *f, size_t flen, int flags, char ***files, int *numfiles)
{
  char buf[_POSIX_PATH_MAX];
  char prefix[_POSIX_PATH_MAX] = "";
  char helpstr[SHORT_STRING];
  char title[STRING];
  struct browser_state state;
  MUTTMENU *menu;
  struct stat st;
  int i, killPrefix = 0;
  int multiple = (flags & M_SEL_MULTI)  ? 1 : 0;
  int folder   = (flags & M_SEL_FOLDER) ? 1 : 0;
  int buffy    = (flags & M_SEL_BUFFY)  ? 1 : 0;

  buffy = buffy && folder;
  
  memset (&state, 0, sizeof (struct browser_state));

  if (!folder)
    strfcpy (LastDirBackup, LastDir, sizeof (LastDirBackup));

  if (*f)
  {
    mutt_expand_path (f, flen);
#ifdef USE_IMAP
    if (mx_is_imap (f))
    {
      init_state (&state, NULL);
      state.imap_browse = 1;
      if (!imap_browse (f, &state))
        strfcpy (LastDir, state.folder, sizeof (LastDir));
    }
    else
    {
#endif
    for (i = mutt_strlen (f) - 1; i > 0 && f[i] != '/' ; i--);
    if (i > 0)
    {
      if (f[0] == '/')
      {
	if (i > sizeof (LastDir) - 1) i = sizeof (LastDir) - 1;
	strncpy (LastDir, f, i);
	LastDir[i] = 0;
      }
      else
      {
	getcwd (LastDir, sizeof (LastDir));
	safe_strcat (LastDir, sizeof (LastDir), "/");
	safe_strncat (LastDir, sizeof (LastDir), f, i);
      }
    }
    else
    {
      if (f[0] == '/')
	strcpy (LastDir, "/");		/* __STRCPY_CHECKED__ */
      else
	getcwd (LastDir, sizeof (LastDir));
    }

    if (i <= 0 && f[0] != '/')
      strfcpy (prefix, f, sizeof (prefix));
    else
      strfcpy (prefix, f + i + 1, sizeof (prefix));
    killPrefix = 1;
#ifdef USE_IMAP
    }
#endif
  }
  else 
  {