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