app/autosave.c

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 /* Autosave */
  20
  21 /* Automatically save a copy with the .autosave extension after idle time.
  22  * Don't autosave unmodified diagrams, and remove the autosave file when
  23  * the diagram is saved successfully.  Also remove autosave file when the
  24  * diagram is closed, even if it was modified.
  25  * If (auto)saving crashes you, this will really fuck you over!
  26  *
  27  */
  28
  29 #ifdef HAVE_CONFIG_H
  30 #include <config.h>
  31 #endif
  32
  33 #include <stdio.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #ifdef HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 #include "intl.h"
  41 #include "dia_dirs.h"
  42 #include "diagram.h"
  43 #include "load_save.h"
  44 #include "dialogs.h"
  45 #include <gtk/gtk.h>
  46
  47 gboolean autosave_check_autosave(gpointer data);
  48
  49 static void autosave_make_restore_dialog(GList *files);
  50 static void autosave_restore_documents(void);
  51
  52 static void
  53 autosave_save_diagram(gpointer data)
  54 {
  55   Diagram *dia = (Diagram *)data;
  56
  57   gtk_idle_remove_by_data(data);
  58
  59   diagram_autosave(dia);
  60 }
  61
  62 /** Makes autosave copies of the diagrams in the appropriate directory
  63  * This function will be called after a diagram is modified, and will
  64  * only save documents that are modified and not already autosaved,
  65  * and only at the next idle period.
  66  */
  67 gboolean
  68 autosave_check_autosave(gpointer data)
  69 {
  70   GList *diagrams = dia_open_diagrams();
  71   Diagram *diagram;
  72
  73   while (diagrams != NULL) {
  74     diagram = (Diagram *)diagrams->data;
  75     if (diagram_is_modified(diagram) &&
  76         !diagram->autosaved) {
  77       /* Diagram has been modified.  At next idleness, save it */
  78       gtk_idle_add((GtkFunction)autosave_save_diagram, diagram);
  79     }
  80     diagrams = g_list_next(diagrams);
  81   }
  82   return TRUE;
  83 }
  84
  85 /* This is old stuff for a restore dialog */
  86 /* Doesn't work with autosave files stored in the files dir */
  87
  88 /** Create a dialog that asks for files to be restore */
  89 static void
  90 autosave_make_restore_dialog(GList *files)
  91 {
  92   GtkWidget *ok, *cancel;
  93   GtkWidget *dialog = dialog_make(_("Recovering autosaved diagrams"),
  94                                   NULL, NULL, &ok, &cancel);
  95   GtkWidget *vbox = GTK_DIALOG(dialog)->vbox;
  96   GtkWidget *selectarea = gtk_clist_new(1);
  97   GList *iter;
  98   gchar **filearray = (gchar**)g_new(gchar *, g_list_length(files)+1);
  99   int i;
 100
 101   gtk_box_pack_start_defaults(GTK_BOX(vbox), gtk_label_new(_("Autosaved files exist.\nPlease select those you wish to recover.")));
 102
 103   for (i = 0, iter = files; iter != NULL; i++, iter = g_list_next(iter)) {
 104     filearray[i] = (gchar *)iter->data;
 105   }
 106   filearray[i] = 0;
 107   gtk_clist_append(GTK_CLIST(selectarea), filearray);
 108
 109   gtk_box_pack_start_defaults(GTK_BOX(vbox), selectarea);
 110   gtk_widget_show_all(dialog);
 111 }
 112
 113 /** If autosave files exist, ask the user if they should be restored
 114  */
 115 void
 116 autosave_restore_documents(void)
 117 {
 118   gchar *savedir = dia_config_filename("autosave" G_DIR_SEPARATOR_S);
 119   GDir *dir = g_dir_open(savedir, 0, NULL);
 120   const char *ent;
 121   GList *files = NULL;
 122
 123   if (dir == NULL) return;
 124   while ((ent = g_dir_read_name(dir)) != NULL) {
 125     printf("Found autosave file %s\n", ent);
 126     files = g_list_prepend(files, g_strdup(ent));
 127   }
 128
 129   if (files != NULL) {
 130     autosave_make_restore_dialog(files);
 131   }
 132   g_dir_close(dir);
 133   g_free(savedir);
 134   g_list_free(files);
 135 }