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                                                  ContentType     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 USE_GPGME
 568                 menu_set_sensitive(mimeview->popupfactory,
 569                                    "/Check signature",
 570                                    mimeview_is_signed(mimeview));
 571 #endif
 572
 573                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 574                                NULL, NULL, NULL, NULL,
 575                                event->button, event->time);
 576         }
 577 }
 578
 579 #define BREAK_ON_MODIFIER_KEY() \
 580         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 581
 582 static void mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 583                                  MimeView *mimeview)
 584 {
 585         SummaryView *summaryview;
 586         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 587         GtkCTreeNode *node;
 588
 589         if (!event) return;
 590         if (!mimeview->opened) return;
 591
 592         switch (event->keyval) {
 593         case GDK_space:
 594                 if (textview_scroll_page(mimeview->textview, FALSE)) return;
 595
 596                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 597                 if (node) {
 598                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 599                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 600                         return;
 601                 }
 602                 break;
 603         case GDK_BackSpace:
 604         case GDK_Delete:
 605                 textview_scroll_page(mimeview->textview, TRUE);
 606                 return;
 607         case GDK_Return:
 608                 textview_scroll_one_line(mimeview->textview,
 609                                          (event->state & GDK_MOD1_MASK) != 0);
 610                 return;
 611         case GDK_n:
 612         case GDK_N:
 613                 BREAK_ON_MODIFIER_KEY();
 614                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 615
 616                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 617                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 618                 return;
 619         case GDK_p:
 620         case GDK_P:
 621                 BREAK_ON_MODIFIER_KEY();
 622                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 623
 624                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 625                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 626                 return;
 627         case GDK_y:
 628                 BREAK_ON_MODIFIER_KEY();
 629                 mimeview_save_as(mimeview);
 630                 return;
 631         case GDK_t:
 632                 BREAK_ON_MODIFIER_KEY();
 633                 mimeview_display_as_text(mimeview);
 634                 return;
 635         case GDK_l:
 636                 BREAK_ON_MODIFIER_KEY();
 637                 mimeview_launch(mimeview);
 638                 return;
 639         default:
 640         }
 641
 642         if (!mimeview->messageview->mainwin) return;
 643         summaryview = mimeview->messageview->mainwin->summaryview;
 644         summary_pass_key_press_event(summaryview, event);
 645 }
 646
 647 static void mimeview_drag_data_get(GtkWidget        *widget,
 648                                    GdkDragContext   *drag_context,
 649                                    GtkSelectionData *selection_data,
 650                                    guint             info,
 651                                    guint             time,
 652                                    MimeView         *mimeview)
 653 {
 654         gchar *filename, *uriname;
 655         MimeInfo *partinfo;
 656
 657         if (!mimeview->opened) return;
 658         if (!mimeview->file) return;
 659
 660         partinfo = gtk_ctree_node_get_row_data
 661                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 662         if (!partinfo) return;
 663         if (!partinfo->filename && !partinfo->name) return;
 664
 665         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 666         filename = g_basename(filename);
 667         if (*filename == '\0') return;
 668
 669         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 670                                filename, NULL);
 671
 672         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 673                 alertpanel_error
 674                         (_("Can't save the part of multipart message."));
 675
 676         uriname = g_strconcat("file:/", filename, NULL);
 677         gtk_selection_data_set(selection_data, selection_data->target, 8,
 678                                uriname, strlen(uriname));
 679
 680         g_free(uriname);
 681         g_free(filename);
 682 }
 683
 684 static void mimeview_display_as_text(MimeView *mimeview)
 685 {
 686         MimeInfo *partinfo;
 687
 688         if (!mimeview->opened) return;
 689
 690         partinfo = gtk_ctree_node_get_row_data
 691                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 692         mimeview_show_message_part(mimeview, partinfo);
 693 }
 694
 695 static void mimeview_save_as(MimeView *mimeview)
 696 {
 697         gchar *filename;
 698         MimeInfo *partinfo;
 699
 700         if (!mimeview->opened) return;
 701         if (!mimeview->file) return;
 702
 703         partinfo = gtk_ctree_node_get_row_data
 704                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 705         g_return_if_fail(partinfo != NULL);
 706
 707         filename = filesel_select_file
 708                 (_("Save as"),
 709                  partinfo->filename ? partinfo->filename : partinfo->name);
 710         if (!filename) return;
 711         if (is_file_exist(filename)) {
 712                 AlertValue aval;
 713
 714                 aval = alertpanel(_("Overwrite"),
 715                                   _("Overwrite existing file?"),
 716                                   _("OK"), _("Cancel"), NULL);
 717                 if (G_ALERTDEFAULT != aval) return;
 718         }
 719
 720         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 721                 alertpanel_error
 722                         (_("Can't save the part of multipart message."));
 723 }
 724
 725 static void mimeview_launch(MimeView *mimeview)
 726 {
 727         MimeInfo *partinfo;
 728         gchar *filename;
 729
 730         if (!mimeview->opened) return;
 731         if (!mimeview->file) return;
 732
 733         partinfo = gtk_ctree_node_get_row_data
 734                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 735         g_return_if_fail(partinfo != NULL);
 736
 737         filename = procmime_get_tmp_file_name(partinfo);
 738
 739         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 740                 alertpanel_error
 741                         (_("Can't save the part of multipart message."));
 742         else
 743                 mimeview_view_file(filename, partinfo, NULL);
 744
 745         g_free(filename);
 746 }
 747
 748 static void mimeview_open_with(MimeView *mimeview)
 749 {
 750         MimeInfo *partinfo;
 751         gchar *filename;
 752
 753         if (!mimeview->opened) return;
 754         if (!mimeview->file) return;
 755
 756         partinfo = gtk_ctree_node_get_row_data
 757                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 758         g_return_if_fail(partinfo != NULL);
 759
 760         filename = procmime_get_tmp_file_name(partinfo);
 761
 762         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 763                 alertpanel_error
 764                         (_("Can't save the part of multipart message."));
 765         else {
 766                 gchar *cmd;
 767
 768                 cmd = input_dialog
 769                         (_("Open with"),
 770                          _("Enter the command line to open file:\n"
 771                            "(`%s' will be replaced with file name)"),
 772                          "gedit %s");
 773                 if (cmd) {
 774                         mimeview_view_file(filename, partinfo, cmd);
 775                         g_free(cmd);
 776                 }
 777         }
 778
 779         g_free(filename);
 780 }
 781
 782 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
 783                                const gchar *cmdline)
 784 {
 785         static gchar *default_image_cmdline = "display '%s'";
 786         static gchar *default_audio_cmdline = "play '%s'";
 787         static gchar *default_html_cmdline =
 788                 "netscape -remote 'openURL(%s,raise)'";
 789         static gchar *mime_cmdline = "metamail -d -b -c %s '%s'";
 790         gchar buf[1024];
 791         gchar m_buf[1024];
 792         const gchar *cmd;
 793         const gchar *def_cmd;
 794         const gchar *p;
 795
 796         if (cmdline) {
 797                 cmd = cmdline;
 798                 def_cmd = NULL;
 799         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 800                 return;
 801         } else if (MIME_IMAGE == partinfo->mime_type) {
 802                 cmd = prefs_common.mime_image_viewer;
 803                 def_cmd = default_image_cmdline;
 804         } else if (MIME_AUDIO == partinfo->mime_type) {
 805                 cmd = prefs_common.mime_audio_player;
 806                 def_cmd = default_audio_cmdline;
 807         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
 808                 cmd = prefs_common.uri_cmd;
 809                 def_cmd = default_html_cmdline;
 810         } else {
 811                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
 812                            partinfo->content_type, "%s");
 813                 cmd = m_buf;
 814                 def_cmd = NULL;
 815         }
 816
 817         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
 818             !strchr(p + 2, '%'))
 819                 g_snprintf(buf, sizeof(buf), cmd, filename);
 820         else {
 821                 if (cmd)
 822                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
 823                 if (def_cmd)
 824                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
 825                 else
 826                         return;
 827         }
 828
 829         execute_command_line(buf);
 830 }
 831
 832 #if USE_GPGME
 833 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
 834                              gpointer data)
 835 {
 836         MimeInfo *partinfo;
 837         gchar *part_name;
 838
 839         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 840         g_return_if_fail(partinfo != NULL);
 841
 842         part_name = get_part_name(partinfo);
 843         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
 844 }
 845
 846 static void mimeview_update_names(MimeView *mimeview)
 847 {
 848         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 849
 850         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
 851 }
 852
 853 static void mimeview_update_signature_info(MimeView *mimeview)
 854 {
 855         MimeInfo *partinfo;
 856
 857         if (!mimeview) return;
 858         if (!mimeview->opened) return;
 859
 860         partinfo = gtk_ctree_node_get_row_data
 861                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 862         if (!partinfo) return;
 863
 864         if (g_strcasecmp(partinfo->content_type,
 865                          "application/pgp-signature") == 0) {
 866                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 867                 textview_show_signature_part(mimeview->textview, partinfo);
 868         }
 869 }
 870
 871 static void mimeview_check_signature(MimeView *mimeview)
 872 {
 873         MimeInfo *mimeinfo;
 874         gchar buf[BUFFSIZE];
 875         FILE *fp;
 876
 877         g_return_if_fail (mimeview_is_signed(mimeview));
 878
 879         mimeinfo = gtk_ctree_node_get_row_data
 880                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 881         g_return_if_fail(mimeinfo != NULL);
 882         g_return_if_fail(mimeview->file != NULL);
 883
 884         while (mimeinfo->parent)
 885                 mimeinfo = mimeinfo->parent;
 886
 887         if ((fp = fopen(mimeview->file, "r")) == NULL) {
 888                 FILE_OP_ERROR(mimeview->file, "fopen");
 889                 return;
 890         }
 891
 892         /* skip headers */
 893         if (mimeinfo->mime_type == MIME_MULTIPART) {
 894                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 895                 FILE_OP_ERROR(mimeview->file, "fseek");
 896                 while (fgets(buf, sizeof(buf), fp) != NULL)
 897                         if (buf[0] == '\r' || buf[0] == '\n') break;
 898         }
 899
 900         procmime_scan_multipart_message(mimeinfo, fp);
 901         rfc2015_check_signature(mimeinfo, fp);
 902         fclose(fp);
 903
 904         mimeview_update_names(mimeview);
 905         mimeview_update_signature_info(mimeview);
 906 }
 907 #endif /* USE_GPGME */