src/mimeview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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 "utils.h"
  50 #include "gtkutils.h"
  51 #include "prefs_common.h"
  52 #include "rfc2015.h"
  53
  54 typedef enum
  55 {
  56         COL_MIMETYPE = 0,
  57         COL_SIZE     = 1,
  58         COL_NAME     = 2
  59 } MimeViewColumnPos;
  60
  61 #define N_MIMEVIEW_COLS 3
  62
  63 static void mimeview_set_multipart_tree         (MimeView       *mimeview,
  64                                                  MimeInfo       *mimeinfo,
  65                                                  GtkCTreeNode   *parent);
  66 static GtkCTreeNode *mimeview_append_part       (MimeView       *mimeview,
  67                                                  MimeInfo       *partinfo,
  68                                                  GtkCTreeNode   *parent);
  69 static void mimeview_show_message_part          (MimeView       *mimeview,
  70                                                  MimeInfo       *partinfo);
  71 static void mimeview_show_image_part            (MimeView       *mimeview,
  72                                                  MimeInfo       *partinfo);
  73 static void mimeview_change_view_type           (MimeView       *mimeview,
  74                                                  ContentType     type);
  75 static void mimeview_clear                      (MimeView       *mimeview);
  76
  77 static void mimeview_selected           (GtkCTree       *ctree,
  78                                          GtkCTreeNode   *node,
  79                                          gint            column,
  80                                          MimeView       *mimeview);
  81 static void mimeview_start_drag         (GtkWidget      *widget,
  82                                          gint            button,
  83                                          GdkEvent       *event,
  84                                          MimeView       *mimeview);
  85 static void mimeview_button_pressed     (GtkWidget      *widget,
  86                                          GdkEventButton *event,
  87                                          MimeView       *mimeview);
  88 static void mimeview_key_pressed        (GtkWidget      *widget,
  89                                          GdkEventKey    *event,
  90                                          MimeView       *mimeview);
  91
  92 static void mimeview_drag_data_get      (GtkWidget        *widget,
  93                                          GdkDragContext   *drag_context,
  94                                          GtkSelectionData *selection_data,
  95                                          guint             info,
  96                                          guint             time,
  97                                          MimeView         *mimeview);
  98
  99 static void mimeview_display_as_text    (MimeView       *mimeview);
 100 static void mimeview_save_as            (MimeView       *mimeview);
 101 static void mimeview_launch             (MimeView       *mimeview);
 102 static void mimeview_view_file          (const gchar    *filename,
 103                                          MimeInfo       *partinfo);
 104 #if USE_GPGME
 105 static void mimeview_check_signature    (MimeView       *mimeview);
 106 #endif
 107
 108 static GtkItemFactoryEntry mimeview_popup_entries[] =
 109 {
 110         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 111         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 112         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL}
 113 #if USE_GPGME
 114         ,
 115         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 116 #endif
 117 };
 118
 119 static GtkTargetEntry mimeview_mime_types[] =
 120 {
 121         {"text/uri-list", 0, 0}
 122 };
 123
 124 MimeView *mimeview_create(void)
 125 {
 126         MimeView *mimeview;
 127
 128         GtkWidget *paned;
 129         GtkWidget *scrolledwin;
 130         GtkWidget *ctree;
 131         GtkWidget *vbox;
 132         GtkWidget *popupmenu;
 133         GtkItemFactory *popupfactory;
 134
 135         gchar *titles[] = {_("MIME Type"), _("Size"), _("Name")};
 136         gint n_entries;
 137         gint i;
 138
 139         debug_print(_("Creating MIME view...\n"));
 140         mimeview = g_new0(MimeView, 1);
 141
 142         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 143         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 144                                        GTK_POLICY_AUTOMATIC,
 145                                        GTK_POLICY_ALWAYS);
 146         gtk_widget_set_usize(scrolledwin, -1, 80);
 147
 148         ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
 149         gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);//SINGLE);
 150         gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
 151         gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
 152                                            GTK_JUSTIFY_RIGHT);
 153         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
 154         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
 155         for (i = 0; i < N_MIMEVIEW_COLS; i++)
 156                 GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
 157                                        GTK_CAN_FOCUS);
 158         gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
 159
 160         gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
 161                            GTK_SIGNAL_FUNC(mimeview_selected), mimeview);
 162         gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
 163                            GTK_SIGNAL_FUNC(mimeview_button_pressed), mimeview);
 164         gtk_signal_connect(GTK_OBJECT(ctree), "key_press_event",
 165                            GTK_SIGNAL_FUNC(mimeview_key_pressed), mimeview);
 166         gtk_signal_connect(GTK_OBJECT (ctree),"start_drag",
 167                            GTK_SIGNAL_FUNC (mimeview_start_drag), mimeview);
 168         gtk_signal_connect(GTK_OBJECT(ctree), "drag_data_get",
 169                            GTK_SIGNAL_FUNC(mimeview_drag_data_get), mimeview);
 170
 171         vbox = gtk_vbox_new(FALSE, 0);
 172
 173         paned = gtk_vpaned_new();
 174         gtk_paned_add1(GTK_PANED(paned), scrolledwin);
 175         gtk_paned_add2(GTK_PANED(paned), vbox);
 176         gtk_widget_show_all(paned);
 177
 178         n_entries = sizeof(mimeview_popup_entries) /
 179                 sizeof(mimeview_popup_entries[0]);
 180         popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
 181                                       "<MimeView>", &popupfactory, mimeview);
 182
 183         mimeview->paned       = paned;
 184         mimeview->scrolledwin = scrolledwin;
 185         mimeview->ctree       = ctree;
 186         mimeview->vbox        = vbox;
 187         mimeview->popupmenu   = popupmenu;
 188         mimeview->popupfactory = popupfactory;
 189
 190         return mimeview;
 191 }
 192
 193 void mimeview_init(MimeView *mimeview)
 194 {
 195 }
 196
 197 /*
 198  * Check whether the message is OpenPGP signed
 199  */
 200 #if USE_GPGME
 201 static gboolean mimeview_is_signed(MimeView *mimeview)
 202 {
 203         MimeInfo *partinfo;
 204
 205         debug_print("mimeview_is signed of %p\n", mimeview);
 206
 207         if (!mimeview) return FALSE;
 208         if (!mimeview->opened) return FALSE;
 209
 210         debug_print("mimeview_is_signed: open\n" );
 211
 212         if (!mimeview->file) return FALSE;
 213
 214         debug_print("mimeview_is_signed: file\n" );
 215
 216         partinfo = gtk_ctree_node_get_row_data
 217                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 218         g_return_val_if_fail(partinfo != NULL, FALSE);
 219
 220         /* walk the tree and see whether there is a signature somewhere */
 221         do {
 222                 if (rfc2015_has_signature(partinfo))
 223                         return TRUE;
 224         } while ((partinfo = partinfo->parent) != NULL);
 225
 226         debug_print("mimeview_is_signed: FALSE\n" );
 227
 228         return FALSE;
 229 }
 230
 231 static void set_unchecked_signature(MimeInfo *mimeinfo)
 232 {
 233         MimeInfo *sig_partinfo;
 234
 235         sig_partinfo = rfc2015_find_signature(mimeinfo);
 236         if (sig_partinfo == NULL) return;
 237
 238         g_free(sig_partinfo->sigstatus);
 239         sig_partinfo->sigstatus =
 240                 g_strdup(_("Select \"Check signature\" to check"));
 241
 242         g_free(sig_partinfo->sigstatus_full);
 243         sig_partinfo->sigstatus_full = NULL;
 244 }
 245 #endif /* USE_GPGME */
 246
 247 void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
 248                            const gchar *file)
 249 {
 250         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 251         GtkCTreeNode *node;
 252         gchar buf[BUFFSIZE];
 253         FILE *fp;
 254
 255         mimeview_clear(mimeview);
 256
 257         g_return_if_fail(file != NULL);
 258         g_return_if_fail(mimeinfo != NULL);
 259
 260         mimeview->mimeinfo = mimeinfo;
 261
 262         if ((fp = fopen(file, "r")) == NULL) {
 263                 FILE_OP_ERROR(file, "fopen");
 264                 return;
 265         }
 266         mimeview->file = g_strdup(file);
 267
 268         /* skip headers */
 269         if (mimeinfo->mime_type == MIME_MULTIPART) {
 270                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 271                 perror("fseek");
 272                 while (fgets(buf, sizeof(buf), fp) != NULL)
 273                         if (buf[0] == '\r' || buf[0] == '\n') break;
 274         }
 275
 276         procmime_scan_multipart_message(mimeinfo, fp);
 277 #if USE_GPGME
 278         if (prefs_common.auto_check_signatures)
 279                 rfc2015_check_signature(mimeinfo, fp);
 280         else
 281                 set_unchecked_signature(mimeinfo);
 282 #endif
 283         fclose(fp);
 284
 285         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 286                                          mimeview);
 287
 288         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 289
 290         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 291                                            mimeview_selected, mimeview);
 292
 293         if ((node = gtk_ctree_node_nth(ctree, 0))) {
 294                 gtk_ctree_select(ctree, node);
 295                 gtk_widget_grab_focus(mimeview->ctree);
 296         }
 297 }
 298
 299 void mimeview_destroy(MimeView *mimeview)
 300 {
 301         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 302         g_free(mimeview->file);
 303         g_free(mimeview);
 304 }
 305
 306 static void mimeview_set_multipart_tree(MimeView *mimeview,
 307                                         MimeInfo *mimeinfo,
 308                                         GtkCTreeNode *parent)
 309 {
 310         g_return_if_fail(mimeinfo != NULL);
 311
 312         if (!mimeinfo->main && mimeinfo->parent)
 313                 parent = mimeview_append_part(mimeview, mimeinfo, parent);
 314
 315         if (mimeinfo->sub && mimeinfo->sub->children)
 316                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, parent);
 317
 318         if (mimeinfo->children) {
 319                 MimeInfo *child;
 320
 321                 child = mimeinfo->children;
 322                 while (child) {
 323                         mimeview_set_multipart_tree(mimeview, child, parent);
 324                         child = child->next;
 325                 }
 326         }
 327 }
 328
 329 static gchar *get_part_name(MimeInfo *partinfo)
 330 {
 331 #if USE_GPGME
 332         if (partinfo->sigstatus)
 333                 return partinfo->sigstatus;
 334         else
 335 #endif
 336         if (partinfo->name)
 337                 return partinfo->name;
 338         else if (partinfo->filename)
 339                 return partinfo->filename;
 340         else
 341                 return "";
 342 }
 343
 344 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 345                                           MimeInfo *partinfo,
 346                                           GtkCTreeNode *parent)
 347 {
 348         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 349         GtkCTreeNode *node;
 350         gchar *str[N_MIMEVIEW_COLS];
 351
 352         str[COL_MIMETYPE] =
 353                 partinfo->content_type ? partinfo->content_type : "";
 354         str[COL_SIZE] = to_human_readable(partinfo->size);
 355         str[COL_NAME] = get_part_name(partinfo);
 356
 357         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 358                                      NULL, NULL, NULL, NULL,
 359                                      FALSE, TRUE);
 360         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 361
 362         return node;
 363 }
 364
 365 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 366 {
 367         FILE *fp;
 368         const gchar *fname;
 369 #if USE_GPGME
 370         MimeInfo *pi;
 371 #endif
 372
 373         if (!partinfo) return;
 374
 375 #if USE_GPGME
 376         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 377                 ;
 378         fname = pi ? pi->plaintextfile : mimeview->file;
 379 #else
 380         fname = mimeview->file;
 381 #endif /* USE_GPGME */
 382         if (!fname) return;
 383
 384         if ((fp = fopen(fname, "r")) == NULL) {
 385                 FILE_OP_ERROR(fname, "fopen");
 386                 return;
 387         }
 388
 389         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 390                 FILE_OP_ERROR(mimeview->file, "fseek");
 391                 fclose(fp);
 392                 return;
 393         }
 394
 395         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 396         textview_show_part(mimeview->textview, partinfo, fp);
 397
 398         fclose(fp);
 399 }
 400
 401 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 402 {
 403         gchar *filename;
 404
 405         if (!partinfo) return;
 406
 407         filename = procmime_get_tmp_file_name(partinfo);
 408
 409         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 410                 alertpanel_error
 411                         (_("Can't get the part of multipart message."));
 412         else {
 413                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 414                 imageview_show_image(mimeview->imageview, partinfo, filename);
 415                 unlink(filename);
 416         }
 417
 418         g_free(filename);
 419 }
 420
 421 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 422 {
 423         TextView  *textview  = mimeview->textview;
 424         ImageView *imageview = mimeview->imageview;
 425
 426         if (mimeview->type == type) return;
 427
 428         switch (type) {
 429         case MIMEVIEW_IMAGE:
 430                 gtk_container_remove(GTK_CONTAINER(mimeview->vbox),
 431                                      GTK_WIDGET_PTR(textview));
 432                 gtk_container_add(GTK_CONTAINER(mimeview->vbox),
 433                                   GTK_WIDGET_PTR(imageview));
 434                 break;
 435         case MIMEVIEW_TEXT:
 436                 gtk_container_remove(GTK_CONTAINER(mimeview->vbox),
 437                                      GTK_WIDGET_PTR(imageview));
 438                 gtk_container_add(GTK_CONTAINER(mimeview->vbox),
 439                                   GTK_WIDGET_PTR(textview));
 440                 break;
 441         default:
 442                 return;
 443         }
 444
 445         mimeview->type = type;
 446 }
 447
 448 static void mimeview_clear(MimeView *mimeview)
 449 {
 450         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 451
 452         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 453         mimeview->mimeinfo = NULL;
 454
 455         gtk_clist_clear(clist);
 456         textview_clear(mimeview->textview);
 457
 458         mimeview->opened = NULL;
 459
 460         g_free(mimeview->file);
 461         mimeview->file = NULL;
 462 }
 463
 464 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 465                               MimeView *mimeview)
 466 {
 467         MimeInfo *partinfo;
 468
 469         if (mimeview->opened == node) return;
 470         mimeview->opened = node;
 471         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 472
 473         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 474         if (!partinfo) return;
 475
 476         switch (partinfo->mime_type) {
 477         case MIME_TEXT:
 478         case MIME_TEXT_HTML:
 479         case MIME_MESSAGE_RFC822:
 480         case MIME_MULTIPART:
 481                 mimeview_show_message_part(mimeview, partinfo);
 482                 break;
 483 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 484         case MIME_IMAGE:
 485                 mimeview_show_image_part(mimeview, partinfo);
 486                 break;
 487 #endif
 488         default:
 489                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 490 #if USE_GPGME
 491                 if (g_strcasecmp(partinfo->content_type,
 492                                  "application/pgp-signature") == 0)
 493                         textview_show_signature_part(mimeview->textview,
 494                                                      partinfo);
 495                 else
 496 #endif
 497                         textview_show_mime_part(mimeview->textview, partinfo);
 498                 break;
 499         }
 500 }
 501
 502 static void mimeview_start_drag (GtkWidget *widget, gint button,
 503                                  GdkEvent *event, MimeView *mimeview)
 504 {
 505         GtkTargetList *list;
 506         GdkDragContext *context;
 507         MimeInfo *partinfo;
 508         GtkCTree *ctree;
 509
 510         g_return_if_fail(mimeview != NULL);
 511         ctree = GTK_CTREE(mimeview->ctree);
 512         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 513         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 514
 515         list = gtk_target_list_new(mimeview_mime_types, 1);
 516         context = gtk_drag_begin(widget, list,
 517                                  GDK_ACTION_COPY, button, event);
 518         gtk_drag_set_icon_default(context);
 519 }
 520
 521 static void mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 522                                     MimeView *mimeview)
 523 {
 524         GtkCList *clist = GTK_CLIST(widget);
 525         MimeInfo *partinfo;
 526         gint row, column;
 527
 528         if (!event) return;
 529
 530         if (event->button == 2 || event->button == 3) {
 531                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 532                                                   &row, &column))
 533                         return;
 534                 gtk_clist_unselect_all(clist);
 535                 gtk_clist_select_row(clist, row, column);
 536                 gtkut_clist_set_focus_row(clist, row);
 537         }
 538
 539         if (event->button == 2 ||
 540             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 541                 /* call external program for image, audio or html */
 542                 mimeview_launch(mimeview);
 543         } else if (event->button == 3) {
 544                 partinfo = gtk_ctree_node_get_row_data
 545                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 546                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 547                                  partinfo->mime_type == MIME_TEXT_HTML ||
 548                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 549                                  partinfo->mime_type == MIME_IMAGE ||
 550                                  partinfo->mime_type == MIME_MULTIPART))
 551                         menu_set_sensitive(mimeview->popupfactory,
 552                                            "/Display as text", FALSE);
 553                 else
 554                         menu_set_sensitive(mimeview->popupfactory,
 555                                            "/Display as text", TRUE);
 556 #if USE_GPGME
 557                 menu_set_sensitive(mimeview->popupfactory,
 558                                    "/Check signature",
 559                                    mimeview_is_signed(mimeview));
 560 #endif
 561
 562                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 563                                NULL, NULL, NULL, NULL,
 564                                event->button, event->time);
 565         }
 566 }
 567
 568 #define BREAK_ON_MODIFIER_KEY() \
 569         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 570
 571 static void mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 572                                  MimeView *mimeview)
 573 {
 574         SummaryView *summaryview;
 575         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 576         GtkCTreeNode *node;
 577
 578         if (!event) return;
 579         if (!mimeview->opened) return;
 580
 581         switch (event->keyval) {
 582         case GDK_space:
 583                 if (textview_scroll_page(mimeview->textview, FALSE)) return;
 584
 585                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 586                 if (node) {
 587                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 588                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 589                         return;
 590                 }
 591                 break;
 592         case GDK_BackSpace:
 593         case GDK_Delete:
 594                 textview_scroll_page(mimeview->textview, TRUE);
 595                 return;
 596         case GDK_Return:
 597                 textview_scroll_one_line(mimeview->textview,
 598                                          (event->state & GDK_MOD1_MASK) != 0);
 599                 return;
 600         case GDK_n:
 601         case GDK_N:
 602                 BREAK_ON_MODIFIER_KEY();
 603                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 604
 605                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 606                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 607                 return;
 608         case GDK_p:
 609         case GDK_P:
 610                 BREAK_ON_MODIFIER_KEY();
 611                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 612
 613                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 614                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 615                 return;
 616         case GDK_y:
 617                 BREAK_ON_MODIFIER_KEY();
 618                 mimeview_save_as(mimeview);
 619                 return;
 620         case GDK_t:
 621                 BREAK_ON_MODIFIER_KEY();
 622                 mimeview_display_as_text(mimeview);
 623                 return;
 624         case GDK_l:
 625                 BREAK_ON_MODIFIER_KEY();
 626                 mimeview_launch(mimeview);
 627                 return;
 628         default:
 629         }
 630
 631         if (!mimeview->messageview->mainwin) return;
 632         summaryview = mimeview->messageview->mainwin->summaryview;
 633         summary_pass_key_press_event(summaryview, event);
 634 }
 635
 636 static void mimeview_drag_data_get(GtkWidget        *widget,
 637                                    GdkDragContext   *drag_context,
 638                                    GtkSelectionData *selection_data,
 639                                    guint             info,
 640                                    guint             time,
 641                                    MimeView         *mimeview)
 642 {
 643         gchar *filename, *uriname;
 644         MimeInfo *partinfo;
 645
 646         if (!mimeview->opened) return;
 647         if (!mimeview->file) return;
 648
 649         partinfo = gtk_ctree_node_get_row_data
 650                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 651         if (!partinfo) return;
 652         if (!partinfo->filename && !partinfo->name) return;
 653
 654         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 655         filename = g_basename(filename);
 656         if (*filename == '\0') return;
 657
 658         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 659                                filename, NULL);
 660
 661         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 662                 alertpanel_error
 663                         (_("Can't save the part of multipart message."));
 664
 665         uriname = g_strconcat("file:/", filename, NULL);
 666         gtk_selection_data_set(selection_data, selection_data->target, 8,
 667                                uriname, strlen(uriname));
 668
 669         g_free(uriname);
 670         g_free(filename);
 671 }
 672
 673 static void mimeview_display_as_text(MimeView *mimeview)
 674 {
 675         MimeInfo *partinfo;
 676
 677         if (!mimeview->opened) return;
 678
 679         partinfo = gtk_ctree_node_get_row_data
 680                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 681         mimeview_show_message_part(mimeview, partinfo);
 682 }
 683
 684 static void mimeview_save_as(MimeView *mimeview)
 685 {
 686         gchar *filename;
 687         MimeInfo *partinfo;
 688
 689         if (!mimeview->opened) return;
 690         if (!mimeview->file) return;
 691
 692         partinfo = gtk_ctree_node_get_row_data
 693                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 694         g_return_if_fail(partinfo != NULL);
 695
 696         filename = filesel_select_file
 697                 (_("Save as"),
 698                  partinfo->filename ? partinfo->filename : partinfo->name);
 699         if (!filename) return;
 700         if (is_file_exist(filename)) {
 701                 AlertValue aval;
 702
 703                 aval = alertpanel(_("Overwrite"),
 704                                   _("Overwrite existing file?"),
 705                                   _("OK"), _("Cancel"), NULL);
 706                 if (G_ALERTDEFAULT != aval) return;
 707         }
 708
 709         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 710                 alertpanel_error
 711                         (_("Can't save the part of multipart message."));
 712 }
 713
 714 static void mimeview_launch(MimeView *mimeview)
 715 {
 716         MimeInfo *partinfo;
 717         gchar *filename;
 718
 719         if (!mimeview->opened) return;
 720         if (!mimeview->file) return;
 721
 722         partinfo = gtk_ctree_node_get_row_data
 723                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 724         g_return_if_fail(partinfo != NULL);
 725
 726         filename = procmime_get_tmp_file_name(partinfo);
 727
 728         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 729                 alertpanel_error
 730                         (_("Can't save the part of multipart message."));
 731         else
 732                 mimeview_view_file(filename, partinfo);
 733
 734         g_free(filename);
 735 }
 736
 737 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo)
 738 {
 739         static gchar *default_image_cmdline = "display '%s'";
 740         static gchar *default_audio_cmdline = "play '%s'";
 741         static gchar *default_html_cmdline =
 742                 "netscape -remote 'openURL(%s,raise)'";
 743         static gchar *mime_cmdline = "metamail -d -b -c %s '%s'";
 744         gchar buf[1024];
 745         gchar m_buf[1024];
 746         gchar *cmd;
 747         gchar *def_cmd;
 748         gchar *p;
 749
 750         if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 751                 return;
 752         } else if (MIME_IMAGE == partinfo->mime_type) {
 753                 cmd = prefs_common.mime_image_viewer;
 754                 def_cmd = default_image_cmdline;
 755         } else if (MIME_AUDIO == partinfo->mime_type) {
 756                 cmd = prefs_common.mime_audio_player;
 757                 def_cmd = default_audio_cmdline;
 758         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
 759                 cmd = prefs_common.uri_cmd;
 760                 def_cmd = default_html_cmdline;
 761         } else {
 762                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
 763                            partinfo->content_type, "%s");
 764                 cmd = m_buf;
 765                 def_cmd = NULL;
 766         }
 767
 768         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
 769             !strchr(p + 2, '%'))
 770                 g_snprintf(buf, sizeof(buf), cmd, filename);
 771         else {
 772                 if (cmd)
 773                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
 774                 if (def_cmd)
 775                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
 776                 else
 777                         return;
 778         }
 779
 780         execute_command_line(buf);
 781 }
 782
 783 #if USE_GPGME
 784 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
 785                              gpointer data)
 786 {
 787         MimeInfo *partinfo;
 788         gchar *part_name;
 789
 790         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 791         g_return_if_fail(partinfo != NULL);
 792
 793         part_name = get_part_name(partinfo);
 794         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
 795 }
 796
 797 static void mimeview_update_names(MimeView *mimeview)
 798 {
 799         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 800
 801         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
 802 }
 803
 804 static void mimeview_update_signature_info(MimeView *mimeview)
 805 {
 806         MimeInfo *partinfo;
 807
 808         if (!mimeview) return;
 809         if (!mimeview->opened) return;
 810
 811         partinfo = gtk_ctree_node_get_row_data
 812                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 813         if (!partinfo) return;
 814
 815         if (g_strcasecmp(partinfo->content_type,
 816                          "application/pgp-signature") == 0) {
 817                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 818                 textview_show_signature_part(mimeview->textview, partinfo);
 819         }
 820 }
 821
 822 static void mimeview_check_signature(MimeView *mimeview)
 823 {
 824         MimeInfo *mimeinfo;
 825         gchar buf[BUFFSIZE];
 826         FILE *fp;
 827
 828         g_return_if_fail (mimeview_is_signed(mimeview));
 829
 830         mimeinfo = gtk_ctree_node_get_row_data
 831                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 832         g_return_if_fail(mimeinfo != NULL);
 833         g_return_if_fail(mimeview->file != NULL);
 834
 835         while (mimeinfo->parent)
 836                 mimeinfo = mimeinfo->parent;
 837
 838         if ((fp = fopen(mimeview->file, "r")) == NULL) {
 839                 FILE_OP_ERROR(mimeview->file, "fopen");
 840                 return;
 841         }
 842
 843         /* skip headers */
 844         if (mimeinfo->mime_type == MIME_MULTIPART) {
 845                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 846                 FILE_OP_ERROR(mimeview->file, "fseek");
 847                 while (fgets(buf, sizeof(buf), fp) != NULL)
 848                         if (buf[0] == '\r' || buf[0] == '\n') break;
 849         }
 850
 851         procmime_scan_multipart_message(mimeinfo, fp);
 852         rfc2015_check_signature(mimeinfo, fp);
 853         fclose(fp);
 854
 855         mimeview_update_names(mimeview);
 856         mimeview_update_signature_info(mimeview);
 857 }
 858 #endif /* USE_GPGME */