src/mimeview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <gtk/gtkscrolledwindow.h>
  29 #include <gtk/gtkctree.h>
  30 #include <gtk/gtkvbox.h>
  31 #include <gtk/gtkvpaned.h>
  32 #include <gtk/gtktext.h>
  33 #include <gtk/gtksignal.h>
  34 #include <gtk/gtkmenu.h>
  35 #include <gtk/gtkdnd.h>
  36 #include <gtk/gtkselection.h>
  37 #include <stdio.h>
  38 #include <unistd.h>
  39
  40 #include "intl.h"
  41 #include "main.h"
  42 #include "mimeview.h"
  43 #include "textview.h"
  44 #include "procmime.h"
  45 #include "summaryview.h"
  46 #include "menu.h"
  47 #include "filesel.h"
  48 #include "alertpanel.h"
  49 #include "inputdialog.h"
  50 #include "utils.h"
  51 #include "gtkutils.h"
  52 #include "prefs_common.h"
  53 #include "rfc2015.h"
  54 #include "pgptext.h"
  55
  56 typedef enum
  57 {
  58         COL_MIMETYPE = 0,
  59         COL_SIZE     = 1,
  60         COL_NAME     = 2
  61 } MimeViewColumnPos;
  62
  63 #define N_MIMEVIEW_COLS 3
  64
  65 static void mimeview_set_multipart_tree         (MimeView       *mimeview,
  66                                                  MimeInfo       *mimeinfo,
  67                                                  GtkCTreeNode   *parent);
  68 static GtkCTreeNode *mimeview_append_part       (MimeView       *mimeview,
  69                                                  MimeInfo       *partinfo,
  70                                                  GtkCTreeNode   *parent);
  71 static void mimeview_show_message_part          (MimeView       *mimeview,
  72                                                  MimeInfo       *partinfo);
  73 static void mimeview_show_image_part            (MimeView       *mimeview,
  74                                                  MimeInfo       *partinfo);
  75 static void mimeview_change_view_type           (MimeView       *mimeview,
  76                                                  MimeViewType    type);
  77 static void mimeview_clear                      (MimeView       *mimeview);
  78
  79 static void mimeview_selected           (GtkCTree       *ctree,
  80                                          GtkCTreeNode   *node,
  81                                          gint            column,
  82                                          MimeView       *mimeview);
  83 static void mimeview_start_drag         (GtkWidget      *widget,
  84                                          gint            button,
  85                                          GdkEvent       *event,
  86                                          MimeView       *mimeview);
  87 static void mimeview_button_pressed     (GtkWidget      *widget,
  88                                          GdkEventButton *event,
  89                                          MimeView       *mimeview);
  90 static void mimeview_key_pressed        (GtkWidget      *widget,
  91                                          GdkEventKey    *event,
  92                                          MimeView       *mimeview);
  93
  94 static void mimeview_drag_data_get      (GtkWidget        *widget,
  95                                          GdkDragContext   *drag_context,
  96                                          GtkSelectionData *selection_data,
  97                                          guint             info,
  98                                          guint             time,
  99                                          MimeView         *mimeview);
 100
 101 static void mimeview_display_as_text    (MimeView       *mimeview);
 102 static void mimeview_save_as            (MimeView       *mimeview);
 103 static void mimeview_launch             (MimeView       *mimeview);
 104 static void mimeview_open_with          (MimeView       *mimeview);
 105 static void mimeview_view_file          (const gchar    *filename,
 106                                          MimeInfo       *partinfo,
 107                                          const gchar    *cmdline);
 108 #if USE_GPGME
 109 static void mimeview_check_signature    (MimeView       *mimeview);
 110 #endif
 111
 112 static GtkItemFactoryEntry mimeview_popup_entries[] =
 113 {
 114         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 115         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 116         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 117         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL}
 118 #if USE_GPGME
 119         ,
 120         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 121 #endif
 122 };
 123
 124 static GtkTargetEntry mimeview_mime_types[] =
 125 {
 126         {"text/uri-list", 0, 0}
 127 };
 128
 129 MimeView *mimeview_create(void)
 130 {
 131         MimeView *mimeview;
 132
 133         GtkWidget *paned;
 134         GtkWidget *scrolledwin;
 135         GtkWidget *ctree;
 136         GtkWidget *vbox;
 137         GtkWidget *popupmenu;
 138         GtkItemFactory *popupfactory;
 139
 140         gchar *titles[] = {_("MIME Type"), _("Size"), _("Name")};
 141         gint n_entries;
 142         gint i;
 143
 144         debug_print(_("Creating MIME view...\n"));
 145         mimeview = g_new0(MimeView, 1);
 146
 147         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 148         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 149                                        GTK_POLICY_AUTOMATIC,
 150                                        GTK_POLICY_ALWAYS);
 151         gtk_widget_set_usize(scrolledwin, -1, 80);
 152
 153         ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
 154         gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);
 155         gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
 156         gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
 157                                            GTK_JUSTIFY_RIGHT);
 158         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
 159         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
 160         for (i = 0; i < N_MIMEVIEW_COLS; i++)
 161                 GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
 162                                        GTK_CAN_FOCUS);
 163         gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
 164
 165         gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
 166                            GTK_SIGNAL_FUNC(mimeview_selected), mimeview);
 167         gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
 168                            GTK_SIGNAL_FUNC(mimeview_button_pressed), mimeview);
 169         gtk_signal_connect(GTK_OBJECT(ctree), "key_press_event",
 170                            GTK_SIGNAL_FUNC(mimeview_key_pressed), mimeview);
 171         gtk_signal_connect(GTK_OBJECT (ctree),"start_drag",
 172                            GTK_SIGNAL_FUNC (mimeview_start_drag), mimeview);
 173         gtk_signal_connect(GTK_OBJECT(ctree), "drag_data_get",
 174                            GTK_SIGNAL_FUNC(mimeview_drag_data_get), mimeview);
 175
 176         vbox = gtk_vbox_new(FALSE, 0);
 177
 178         paned = gtk_vpaned_new();
 179         gtk_paned_add1(GTK_PANED(paned), scrolledwin);
 180         gtk_paned_add2(GTK_PANED(paned), vbox);
 181         gtk_widget_show_all(paned);
 182
 183         n_entries = sizeof(mimeview_popup_entries) /
 184                 sizeof(mimeview_popup_entries[0]);
 185         popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
 186                                       "<MimeView>", &popupfactory, mimeview);
 187
 188         mimeview->paned       = paned;
 189         mimeview->scrolledwin = scrolledwin;
 190         mimeview->ctree       = ctree;
 191         mimeview->vbox        = vbox;
 192         mimeview->popupmenu   = popupmenu;
 193         mimeview->popupfactory = popupfactory;
 194
 195         return mimeview;
 196 }
 197
 198 void mimeview_init(MimeView *mimeview)
 199 {
 200 }
 201
 202 /*
 203  * Check whether the message is OpenPGP signed
 204  */
 205 #if USE_GPGME
 206 static gboolean mimeview_is_signed(MimeView *mimeview)
 207 {
 208         MimeInfo *partinfo;
 209
 210         debug_print("mimeview_is signed of %p\n", mimeview);
 211
 212         if (!mimeview) return FALSE;
 213         if (!mimeview->opened) return FALSE;
 214
 215         debug_print("mimeview_is_signed: open\n" );
 216
 217         if (!mimeview->file) return FALSE;
 218
 219         debug_print("mimeview_is_signed: file\n" );
 220
 221         partinfo = gtk_ctree_node_get_row_data
 222                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 223         g_return_val_if_fail(partinfo != NULL, FALSE);
 224
 225         /* walk the tree and see whether there is a signature somewhere */
 226         do {
 227                 if (rfc2015_has_signature(partinfo))
 228                         return TRUE;
 229                 if (pgptext_has_signature(partinfo))
 230                         return TRUE;
 231         } while ((partinfo = partinfo->parent) != NULL);
 232
 233         debug_print("mimeview_is_signed: FALSE\n" );
 234
 235         return FALSE;
 236 }
 237
 238 static void set_unchecked_signature(MimeInfo *mimeinfo)
 239 {
 240         MimeInfo *sig_partinfo;
 241
 242         sig_partinfo = rfc2015_find_signature(mimeinfo);
 243         if (sig_partinfo == NULL) return;
 244
 245         g_free(sig_partinfo->sigstatus);
 246         sig_partinfo->sigstatus =
 247                 g_strdup(_("Select \"Check signature\" to check"));
 248
 249         g_free(sig_partinfo->sigstatus_full);
 250         sig_partinfo->sigstatus_full = NULL;
 251 }
 252 #endif /* USE_GPGME */
 253
 254 void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
 255                            const gchar *file)
 256 {
 257         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 258         GtkCTreeNode *node;
 259         gchar buf[BUFFSIZE];
 260         FILE *fp;
 261
 262         mimeview_clear(mimeview);
 263
 264         g_return_if_fail(file != NULL);
 265         g_return_if_fail(mimeinfo != NULL);
 266
 267         mimeview->mimeinfo = mimeinfo;
 268
 269         if ((fp = fopen(file, "r")) == NULL) {
 270                 FILE_OP_ERROR(file, "fopen");
 271                 return;
 272         }
 273         mimeview->file = g_strdup(file);
 274
 275         /* skip MIME part headers */
 276         if (mimeinfo->mime_type == MIME_MULTIPART) {
 277                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 278                 perror("fseek");
 279                 while (fgets(buf, sizeof(buf), fp) != NULL)
 280                         if (buf[0] == '\r' || buf[0] == '\n') break;
 281         }
 282
 283         procmime_scan_multipart_message(mimeinfo, fp);
 284 #if USE_GPGME
 285         if (prefs_common.auto_check_signatures)
 286                 rfc2015_check_signature(mimeinfo, fp);
 287         else
 288                 set_unchecked_signature(mimeinfo);
 289 #endif
 290         fclose(fp);
 291
 292         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 293                                          mimeview);
 294
 295         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 296
 297         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 298                                            mimeview_selected, mimeview);
 299
 300         /* search first text part */
 301         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 302              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 303                 MimeInfo *partinfo;
 304
 305                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 306                 if (partinfo && partinfo->mime_type == MIME_TEXT)
 307                         break;
 308         }
 309         if (!node)
 310                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 311
 312         if (node) {
 313                 gtk_ctree_select(ctree, node);
 314                 gtkut_ctree_set_focus_row(ctree, node);
 315                 gtk_widget_grab_focus(mimeview->ctree);
 316         }
 317 }
 318
 319 void mimeview_destroy(MimeView *mimeview)
 320 {
 321         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 322         g_free(mimeview->file);
 323         g_free(mimeview);
 324 }
 325
 326 static void mimeview_set_multipart_tree(MimeView *mimeview,
 327                                         MimeInfo *mimeinfo,
 328                                         GtkCTreeNode *parent)
 329 {
 330         g_return_if_fail(mimeinfo != NULL);
 331
 332         if (!mimeinfo->main && mimeinfo->parent)
 333                 parent = mimeview_append_part(mimeview, mimeinfo, parent);
 334
 335         if (mimeinfo->sub && mimeinfo->sub->children)
 336                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, parent);
 337
 338         if (mimeinfo->children) {
 339                 MimeInfo *child;
 340
 341                 child = mimeinfo->children;
 342                 while (child) {
 343                         mimeview_set_multipart_tree(mimeview, child, parent);
 344                         child = child->next;
 345                 }
 346         }
 347 }
 348
 349 static gchar *get_part_name(MimeInfo *partinfo)
 350 {
 351 #if USE_GPGME
 352         if (partinfo->sigstatus)
 353                 return partinfo->sigstatus;
 354         else
 355 #endif
 356         if (partinfo->name)
 357                 return partinfo->name;
 358         else if (partinfo->filename)
 359                 return partinfo->filename;
 360         else
 361                 return "";
 362 }
 363
 364 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 365                                           MimeInfo *partinfo,
 366                                           GtkCTreeNode *parent)
 367 {
 368         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 369         GtkCTreeNode *node;
 370         gchar *str[N_MIMEVIEW_COLS];
 371
 372         str[COL_MIMETYPE] =
 373                 partinfo->content_type ? partinfo->content_type : "";
 374         str[COL_SIZE] = to_human_readable(partinfo->size);
 375         str[COL_NAME] = get_part_name(partinfo);
 376
 377         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 378                                      NULL, NULL, NULL, NULL,
 379                                      FALSE, TRUE);
 380         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 381
 382         return node;
 383 }
 384
 385 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 386 {
 387         FILE *fp;
 388         const gchar *fname;
 389 #if USE_GPGME
 390         MimeInfo *pi;
 391 #endif
 392
 393         if (!partinfo) return;
 394
 395 #if USE_GPGME
 396         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 397                 ;
 398         fname = pi ? pi->plaintextfile : mimeview->file;
 399 #else
 400         fname = mimeview->file;
 401 #endif /* USE_GPGME */
 402         if (!fname) return;
 403
 404         if ((fp = fopen(fname, "r")) == NULL) {
 405                 FILE_OP_ERROR(fname, "fopen");
 406                 return;
 407         }
 408
 409         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 410                 FILE_OP_ERROR(mimeview->file, "fseek");
 411                 fclose(fp);
 412                 return;
 413         }
 414
 415         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 416         textview_show_part(mimeview->textview, partinfo, fp);
 417
 418         fclose(fp);
 419 }
 420
 421 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 422 {
 423         gchar *filename;
 424
 425         if (!partinfo) return;
 426
 427         filename = procmime_get_tmp_file_name(partinfo);
 428
 429         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 430                 alertpanel_error
 431                         (_("Can't get the part of multipart message."));
 432         else {
 433                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 434                 imageview_show_image(mimeview->imageview, partinfo, filename);
 435                 unlink(filename);
 436         }
 437
 438         g_free(filename);
 439 }
 440
 441 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 442 {
 443         TextView  *textview  = mimeview->textview;
 444         ImageView *imageview = mimeview->imageview;
 445
 446         if (mimeview->type == type) return;
 447
 448         switch (type) {
 449         case MIMEVIEW_IMAGE:
 450                 gtk_container_remove(GTK_CONTAINER(mimeview->vbox),
 451                                      GTK_WIDGET_PTR(textview));
 452                 gtk_container_add(GTK_CONTAINER(mimeview->vbox),
 453                                   GTK_WIDGET_PTR(imageview));
 454                 break;
 455         case MIMEVIEW_TEXT:
 456                 gtk_container_remove(GTK_CONTAINER(mimeview->vbox),
 457                                      GTK_WIDGET_PTR(imageview));
 458                 gtk_container_add(GTK_CONTAINER(mimeview->vbox),
 459                                   GTK_WIDGET_PTR(textview));
 460                 break;
 461         default:
 462                 return;
 463         }
 464
 465         mimeview->type = type;
 466 }
 467
 468 static void mimeview_clear(MimeView *mimeview)
 469 {
 470         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 471
 472         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 473         mimeview->mimeinfo = NULL;
 474
 475         gtk_clist_clear(clist);
 476         textview_clear(mimeview->textview);
 477
 478         mimeview->opened = NULL;
 479
 480         g_free(mimeview->file);
 481         mimeview->file = NULL;
 482 }
 483
 484 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 485                               MimeView *mimeview)
 486 {
 487         MimeInfo *partinfo;
 488
 489         if (mimeview->opened == node) return;
 490         mimeview->opened = node;
 491         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 492
 493         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 494         if (!partinfo) return;
 495
 496         /* ungrab the mouse event */
 497         if (GTK_WIDGET_HAS_GRAB(ctree)) {
 498                 gtk_grab_remove(GTK_WIDGET(ctree));
 499                 if (gdk_pointer_is_grabbed())
 500                         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 501         }
 502
 503         switch (partinfo->mime_type) {
 504         case MIME_TEXT:
 505         case MIME_TEXT_HTML:
 506         case MIME_TEXT_ENRICHED:
 507         case MIME_MESSAGE_RFC822:
 508         case MIME_MULTIPART:
 509                 mimeview_show_message_part(mimeview, partinfo);
 510                 break;
 511 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 512         case MIME_IMAGE:
 513                 mimeview_show_image_part(mimeview, partinfo);
 514                 break;
 515 #endif
 516         default:
 517                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 518 #if USE_GPGME
 519                 if (g_strcasecmp(partinfo->content_type,
 520                                  "application/pgp-signature") == 0)
 521                         textview_show_signature_part(mimeview->textview,
 522                                                      partinfo);
 523                 else
 524 #endif
 525                         textview_show_mime_part(mimeview->textview, partinfo);
 526                 break;
 527         }
 528 }
 529
 530 static void mimeview_start_drag (GtkWidget *widget, gint button,
 531                                  GdkEvent *event, MimeView *mimeview)
 532 {
 533         GtkTargetList *list;
 534         GdkDragContext *context;
 535         MimeInfo *partinfo;
 536         GtkCTree *ctree;
 537
 538         g_return_if_fail(mimeview != NULL);
 539         ctree = GTK_CTREE(mimeview->ctree);
 540         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 541         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 542
 543         list = gtk_target_list_new(mimeview_mime_types, 1);
 544         context = gtk_drag_begin(widget, list,
 545                                  GDK_ACTION_COPY, button, event);
 546         gtk_drag_set_icon_default(context);
 547 }
 548
 549 static void mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 550                                     MimeView *mimeview)
 551 {
 552         GtkCList *clist = GTK_CLIST(widget);
 553         MimeInfo *partinfo;
 554         gint row, column;
 555
 556         if (!event) return;
 557
 558         if (event->button == 2 || event->button == 3) {
 559                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 560                                                   &row, &column))
 561                         return;
 562                 gtk_clist_unselect_all(clist);
 563                 gtk_clist_select_row(clist, row, column);
 564                 gtkut_clist_set_focus_row(clist, row);
 565         }
 566
 567         if (event->button == 2 ||
 568             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 569                 /* call external program for image, audio or html */
 570                 mimeview_launch(mimeview);
 571         } else if (event->button == 3) {
 572                 partinfo = gtk_ctree_node_get_row_data
 573                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 574                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 575                                  partinfo->mime_type == MIME_TEXT_HTML ||
 576                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 577                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 578                                  partinfo->mime_type == MIME_IMAGE ||
 579                                  partinfo->mime_type == MIME_MULTIPART))
 580                         menu_set_sensitive(mimeview->popupfactory,
 581                                            "/Display as text", FALSE);
 582                 else
 583                         menu_set_sensitive(mimeview->popupfactory,
 584                                            "/Display as text", TRUE);
 585                 if (partinfo &&
 586                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 587                         menu_set_sensitive(mimeview->popupfactory,
 588                                            "/Open", FALSE);
 589                 else
 590                         menu_set_sensitive(mimeview->popupfactory,
 591                                            "/Open", TRUE);
 592 #if USE_GPGME
 593                 menu_set_sensitive(mimeview->popupfactory,
 594                                    "/Check signature",
 595                                    mimeview_is_signed(mimeview));
 596 #endif
 597
 598                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 599                                NULL, NULL, NULL, NULL,
 600                                event->button, event->time);
 601         }
 602 }
 603
 604 #define BREAK_ON_MODIFIER_KEY() \
 605         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 606
 607 static void mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 608                                  MimeView *mimeview)
 609 {
 610         SummaryView *summaryview;
 611         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 612         GtkCTreeNode *node;
 613
 614         if (!event) return;
 615         if (!mimeview->opened) return;
 616
 617         switch (event->keyval) {
 618         case GDK_space:
 619                 if (textview_scroll_page(mimeview->textview, FALSE)) return;
 620
 621                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 622                 if (node) {
 623                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 624                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 625                         return;
 626                 }
 627                 break;
 628         case GDK_BackSpace:
 629                 textview_scroll_page(mimeview->textview, TRUE);
 630                 return;
 631         case GDK_Return:
 632                 textview_scroll_one_line(mimeview->textview,
 633                                          (event->state & GDK_MOD1_MASK) != 0);
 634                 return;
 635         case GDK_n:
 636         case GDK_N:
 637                 BREAK_ON_MODIFIER_KEY();
 638                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 639
 640                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 641                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 642                 return;
 643         case GDK_p:
 644         case GDK_P:
 645                 BREAK_ON_MODIFIER_KEY();
 646                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 647
 648                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 649                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 650                 return;
 651         case GDK_y:
 652                 BREAK_ON_MODIFIER_KEY();
 653                 mimeview_save_as(mimeview);
 654                 return;
 655         case GDK_t:
 656                 BREAK_ON_MODIFIER_KEY();
 657                 mimeview_display_as_text(mimeview);
 658                 return;
 659         case GDK_l:
 660                 BREAK_ON_MODIFIER_KEY();
 661                 mimeview_launch(mimeview);
 662                 return;
 663         default:
 664                 break;
 665         }
 666
 667         if (!mimeview->messageview->mainwin) return;
 668         summaryview = mimeview->messageview->mainwin->summaryview;
 669         summary_pass_key_press_event(summaryview, event);
 670 }
 671
 672 static void mimeview_drag_data_get(GtkWidget        *widget,
 673                                    GdkDragContext   *drag_context,
 674                                    GtkSelectionData *selection_data,
 675                                    guint             info,
 676                                    guint             time,
 677                                    MimeView         *mimeview)
 678 {
 679         gchar *filename, *uriname;
 680         MimeInfo *partinfo;
 681
 682         if (!mimeview->opened) return;
 683         if (!mimeview->file) return;
 684
 685         partinfo = gtk_ctree_node_get_row_data
 686                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 687         if (!partinfo) return;
 688         if (!partinfo->filename && !partinfo->name) return;
 689
 690         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 691         filename = g_basename(filename);
 692         if (*filename == '\0') return;
 693
 694         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 695                                filename, NULL);
 696
 697         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 698                 alertpanel_error
 699                         (_("Can't save the part of multipart message."));
 700
 701         uriname = g_strconcat("file:/", filename, NULL);
 702         gtk_selection_data_set(selection_data, selection_data->target, 8,
 703                                uriname, strlen(uriname));
 704
 705         g_free(uriname);
 706         g_free(filename);
 707 }
 708
 709 static void mimeview_display_as_text(MimeView *mimeview)
 710 {
 711         MimeInfo *partinfo;
 712
 713         if (!mimeview->opened) return;
 714
 715         partinfo = gtk_ctree_node_get_row_data
 716                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 717         mimeview_show_message_part(mimeview, partinfo);
 718 }
 719
 720 static void mimeview_save_as(MimeView *mimeview)
 721 {
 722         gchar *filename;
 723         MimeInfo *partinfo;
 724
 725         if (!mimeview->opened) return;
 726         if (!mimeview->file) return;
 727
 728         partinfo = gtk_ctree_node_get_row_data
 729                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 730         g_return_if_fail(partinfo != NULL);
 731
 732         filename = filesel_select_file
 733                 (_("Save as"),
 734                  partinfo->filename ? partinfo->filename : partinfo->name);
 735         if (!filename) return;
 736         if (is_file_exist(filename)) {
 737                 AlertValue aval;
 738
 739                 aval = alertpanel(_("Overwrite"),
 740                                   _("Overwrite existing file?"),
 741                                   _("OK"), _("Cancel"), NULL);
 742                 if (G_ALERTDEFAULT != aval) return;
 743         }
 744
 745         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 746                 alertpanel_error
 747                         (_("Can't save the part of multipart message."));
 748 }
 749
 750 static void mimeview_launch(MimeView *mimeview)
 751 {
 752         MimeInfo *partinfo;
 753         gchar *filename;
 754
 755         if (!mimeview->opened) return;
 756         if (!mimeview->file) return;
 757
 758         partinfo = gtk_ctree_node_get_row_data
 759                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 760         g_return_if_fail(partinfo != NULL);
 761
 762         filename = procmime_get_tmp_file_name(partinfo);
 763
 764         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 765                 alertpanel_error
 766                         (_("Can't save the part of multipart message."));
 767         else
 768                 mimeview_view_file(filename, partinfo, NULL);
 769
 770         g_free(filename);
 771 }
 772
 773 static void mimeview_open_with(MimeView *mimeview)
 774 {
 775         MimeInfo *partinfo;
 776         gchar *filename;
 777         gchar *cmd;
 778
 779         if (!mimeview->opened) return;
 780         if (!mimeview->file) return;
 781
 782         partinfo = gtk_ctree_node_get_row_data
 783                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 784         g_return_if_fail(partinfo != NULL);
 785
 786         filename = procmime_get_tmp_file_name(partinfo);
 787
 788         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
 789                 alertpanel_error
 790                         (_("Can't save the part of multipart message."));
 791                 g_free(filename);
 792                 return;
 793         }
 794
 795         if (!prefs_common.mime_open_cmd_history)
 796                 prefs_common.mime_open_cmd_history =
 797                         add_history(NULL, prefs_common.mime_open_cmd);
 798
 799         cmd = input_dialog_combo
 800                 (_("Open with"),
 801                  _("Enter the command line to open file:\n"
 802                    "(`%s' will be replaced with file name)"),
 803                  prefs_common.mime_open_cmd,
 804                  prefs_common.mime_open_cmd_history);
 805         if (cmd) {
 806                 mimeview_view_file(filename, partinfo, cmd);
 807                 g_free(prefs_common.mime_open_cmd);
 808                 prefs_common.mime_open_cmd = cmd;
 809                 prefs_common.mime_open_cmd_history =
 810                         add_history(prefs_common.mime_open_cmd_history, cmd);
 811         }
 812
 813         g_free(filename);
 814 }
 815
 816 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
 817                                const gchar *cmdline)
 818 {
 819         static gchar *default_image_cmdline = "display '%s'";
 820         static gchar *default_audio_cmdline = "play '%s'";
 821         static gchar *default_html_cmdline =
 822                 "netscape -remote 'openURL(%s,raise)'";
 823         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
 824         gchar buf[1024];
 825         gchar m_buf[1024];
 826         const gchar *cmd;
 827         const gchar *def_cmd;
 828         const gchar *p;
 829
 830         if (cmdline) {
 831                 cmd = cmdline;
 832                 def_cmd = NULL;
 833         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 834                 return;
 835         } else if (MIME_IMAGE == partinfo->mime_type) {
 836                 cmd = prefs_common.mime_image_viewer;
 837                 def_cmd = default_image_cmdline;
 838         } else if (MIME_AUDIO == partinfo->mime_type) {
 839                 cmd = prefs_common.mime_audio_player;
 840                 def_cmd = default_audio_cmdline;
 841         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
 842                 cmd = prefs_common.uri_cmd;
 843                 def_cmd = default_html_cmdline;
 844         } else {
 845                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
 846                            partinfo->content_type, "%s");
 847                 cmd = m_buf;
 848                 def_cmd = NULL;
 849         }
 850
 851         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
 852             !strchr(p + 2, '%'))
 853                 g_snprintf(buf, sizeof(buf), cmd, filename);
 854         else {
 855                 if (cmd)
 856                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
 857                 if (def_cmd)
 858                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
 859                 else
 860                         return;
 861         }
 862
 863         execute_command_line(buf, TRUE);
 864 }
 865
 866 #if USE_GPGME
 867 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
 868                              gpointer data)
 869 {
 870         MimeInfo *partinfo;
 871         gchar *part_name;
 872
 873         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 874         g_return_if_fail(partinfo != NULL);
 875
 876         part_name = get_part_name(partinfo);
 877         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
 878 }
 879
 880 static void mimeview_update_names(MimeView *mimeview)
 881 {
 882         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 883
 884         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
 885 }
 886
 887 static void mimeview_update_signature_info(MimeView *mimeview)
 888 {
 889         MimeInfo *partinfo;
 890
 891         if (!mimeview) return;
 892         if (!mimeview->opened) return;
 893
 894         partinfo = gtk_ctree_node_get_row_data
 895                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 896         if (!partinfo) return;
 897
 898         if (g_strcasecmp(partinfo->content_type,
 899                          "application/pgp-signature") == 0) {
 900                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 901                 textview_show_signature_part(mimeview->textview, partinfo);
 902         }
 903 }
 904
 905 static void mimeview_check_signature(MimeView *mimeview)
 906 {
 907         MimeInfo *mimeinfo;
 908         gchar buf[BUFFSIZE];
 909         FILE *fp;
 910
 911         g_return_if_fail (mimeview_is_signed(mimeview));
 912
 913         mimeinfo = gtk_ctree_node_get_row_data
 914                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 915         g_return_if_fail(mimeinfo != NULL);
 916         g_return_if_fail(mimeview->file != NULL);
 917
 918         while (mimeinfo->parent)
 919                 mimeinfo = mimeinfo->parent;
 920
 921         if ((fp = fopen(mimeview->file, "r")) == NULL) {
 922                 FILE_OP_ERROR(mimeview->file, "fopen");
 923                 return;
 924         }
 925
 926         /* skip headers */
 927         if (mimeinfo->mime_type == MIME_MULTIPART) {
 928                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 929                 FILE_OP_ERROR(mimeview->file, "fseek");
 930                 while (fgets(buf, sizeof(buf), fp) != NULL)
 931                         if (buf[0] == '\r' || buf[0] == '\n') break;
 932         }
 933
 934         procmime_scan_multipart_message(mimeinfo, fp);
 935         rfc2015_check_signature(mimeinfo, fp);
 936         fclose(fp);
 937
 938         mimeview_update_names(mimeview);
 939         mimeview_update_signature_info(mimeview);
 940 }
 941 #endif /* USE_GPGME */