src/mimeview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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/gtknotebook.h>
  29 #include <gtk/gtkscrolledwindow.h>
  30 #include <gtk/gtkctree.h>
  31 #include <gtk/gtkvbox.h>
  32 #include <gtk/gtkvpaned.h>
  33 #include <gtk/gtktext.h>
  34 #include <gtk/gtksignal.h>
  35 #include <gtk/gtkmenu.h>
  36 #include <gtk/gtkdnd.h>
  37 #include <gtk/gtkselection.h>
  38 #include <stdio.h>
  39 #include <unistd.h>
  40
  41 #include "intl.h"
  42 #include "main.h"
  43 #include "mimeview.h"
  44 #include "textview.h"
  45 #include "procmime.h"
  46 #include "summaryview.h"
  47 #include "menu.h"
  48 #include "filesel.h"
  49 #include "alertpanel.h"
  50 #include "inputdialog.h"
  51 #include "utils.h"
  52 #include "gtkutils.h"
  53 #include "prefs_common.h"
  54 #include "rfc2015.h"
  55 #include "pgptext.h"
  56
  57 typedef enum
  58 {
  59         COL_MIMETYPE = 0,
  60         COL_SIZE     = 1,
  61         COL_NAME     = 2
  62 } MimeViewColumnPos;
  63
  64 #define N_MIMEVIEW_COLS 3
  65
  66 static void mimeview_set_multipart_tree         (MimeView       *mimeview,
  67                                                  MimeInfo       *mimeinfo,
  68                                                  GtkCTreeNode   *parent);
  69 static GtkCTreeNode *mimeview_append_part       (MimeView       *mimeview,
  70                                                  MimeInfo       *partinfo,
  71                                                  GtkCTreeNode   *parent);
  72 static void mimeview_show_message_part          (MimeView       *mimeview,
  73                                                  MimeInfo       *partinfo);
  74 static void mimeview_show_image_part            (MimeView       *mimeview,
  75                                                  MimeInfo       *partinfo);
  76 static void mimeview_change_view_type           (MimeView       *mimeview,
  77                                                  MimeViewType    type);
  78 static void mimeview_clear                      (MimeView       *mimeview);
  79
  80 static void mimeview_selected           (GtkCTree       *ctree,
  81                                          GtkCTreeNode   *node,
  82                                          gint            column,
  83                                          MimeView       *mimeview);
  84 static void mimeview_start_drag         (GtkWidget      *widget,
  85                                          gint            button,
  86                                          GdkEvent       *event,
  87                                          MimeView       *mimeview);
  88 static gint mimeview_button_pressed     (GtkWidget      *widget,
  89                                          GdkEventButton *event,
  90                                          MimeView       *mimeview);
  91 static gint mimeview_key_pressed        (GtkWidget      *widget,
  92                                          GdkEventKey    *event,
  93                                          MimeView       *mimeview);
  94
  95 static void mimeview_drag_data_get      (GtkWidget        *widget,
  96                                          GdkDragContext   *drag_context,
  97                                          GtkSelectionData *selection_data,
  98                                          guint             info,
  99                                          guint             time,
 100                                          MimeView         *mimeview);
 101
 102 static void mimeview_display_as_text    (MimeView       *mimeview);
 103 static void mimeview_save_as            (MimeView       *mimeview);
 104 static void mimeview_launch             (MimeView       *mimeview);
 105 static void mimeview_open_with          (MimeView       *mimeview);
 106 static void mimeview_view_file          (const gchar    *filename,
 107                                          MimeInfo       *partinfo,
 108                                          const gchar    *cmdline);
 109 #if USE_GPGME
 110 static void mimeview_check_signature    (MimeView       *mimeview);
 111 #endif
 112
 113 static GtkItemFactoryEntry mimeview_popup_entries[] =
 114 {
 115         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 116         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 117         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 118         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL}
 119 #if USE_GPGME
 120         ,
 121         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 122 #endif
 123 };
 124
 125 static GtkTargetEntry mimeview_mime_types[] =
 126 {
 127         {"text/uri-list", 0, 0}
 128 };
 129
 130 MimeView *mimeview_create(void)
 131 {
 132         MimeView *mimeview;
 133
 134         GtkWidget *notebook;
 135         GtkWidget *vbox;
 136         GtkWidget *paned;
 137         GtkWidget *scrolledwin;
 138         GtkWidget *ctree;
 139         GtkWidget *mime_vbox;
 140         GtkWidget *popupmenu;
 141         GtkItemFactory *popupfactory;
 142         gchar *titles[N_MIMEVIEW_COLS];
 143         gint n_entries;
 144         gint i;
 145
 146         debug_print(_("Creating MIME view...\n"));
 147         mimeview = g_new0(MimeView, 1);
 148
 149         titles[COL_MIMETYPE] = _("MIME Type");
 150         titles[COL_SIZE]     = _("Size");
 151         titles[COL_NAME]     = _("Name");
 152
 153         notebook = gtk_notebook_new();
 154         gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook), TRUE);
 155
 156         vbox = gtk_vbox_new(FALSE, 0);
 157         gtk_container_add(GTK_CONTAINER(notebook), vbox);
 158         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), vbox,
 159                                         _("Text"));
 160
 161         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 162         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 163                                        GTK_POLICY_AUTOMATIC,
 164                                        GTK_POLICY_ALWAYS);
 165         gtk_widget_set_usize(scrolledwin, -1, 80);
 166
 167         ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
 168         gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);
 169         gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
 170         gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
 171                                            GTK_JUSTIFY_RIGHT);
 172         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
 173         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
 174         for (i = 0; i < N_MIMEVIEW_COLS; i++)
 175                 GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
 176                                        GTK_CAN_FOCUS);
 177         gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
 178
 179         gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
 180                            GTK_SIGNAL_FUNC(mimeview_selected), mimeview);
 181         gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
 182                            GTK_SIGNAL_FUNC(mimeview_button_pressed), mimeview);
 183         gtk_signal_connect(GTK_OBJECT(ctree), "key_press_event",
 184                            GTK_SIGNAL_FUNC(mimeview_key_pressed), mimeview);
 185         gtk_signal_connect(GTK_OBJECT (ctree),"start_drag",
 186                            GTK_SIGNAL_FUNC (mimeview_start_drag), mimeview);
 187         gtk_signal_connect(GTK_OBJECT(ctree), "drag_data_get",
 188                            GTK_SIGNAL_FUNC(mimeview_drag_data_get), mimeview);
 189
 190         mime_vbox = gtk_vbox_new(FALSE, 0);
 191
 192         paned = gtk_vpaned_new();
 193         gtk_paned_add1(GTK_PANED(paned), scrolledwin);
 194         gtk_paned_add2(GTK_PANED(paned), mime_vbox);
 195         gtk_container_add(GTK_CONTAINER(notebook), paned);
 196         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), paned,
 197                                         _("Attachments"));
 198
 199         gtk_widget_show_all(notebook);
 200
 201         gtk_notebook_set_page(GTK_NOTEBOOK(notebook), 0);
 202
 203         n_entries = sizeof(mimeview_popup_entries) /
 204                 sizeof(mimeview_popup_entries[0]);
 205         popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
 206                                       "<MimeView>", &popupfactory, mimeview);
 207
 208         mimeview->notebook     = notebook;
 209         mimeview->vbox         = vbox;
 210         mimeview->paned        = paned;
 211         mimeview->scrolledwin  = scrolledwin;
 212         mimeview->ctree        = ctree;
 213         mimeview->mime_vbox    = mime_vbox;
 214         mimeview->popupmenu    = popupmenu;
 215         mimeview->popupfactory = popupfactory;
 216         mimeview->type         = -1;
 217
 218         return mimeview;
 219 }
 220
 221 void mimeview_init(MimeView *mimeview)
 222 {
 223 }
 224
 225 /*
 226  * Check whether the message is OpenPGP signed
 227  */
 228 #if USE_GPGME
 229 static gboolean mimeview_is_signed(MimeView *mimeview)
 230 {
 231         MimeInfo *partinfo = NULL;
 232
 233         debug_print("mimeview_is signed of %p\n", mimeview);
 234
 235         if (!mimeview) return FALSE;
 236         if (!mimeview->opened) return FALSE;
 237
 238         debug_print("mimeview_is_signed: open\n" );
 239
 240         if (!mimeview->file) return FALSE;
 241
 242         debug_print("mimeview_is_signed: file\n" );
 243
 244         partinfo = gtk_ctree_node_get_row_data
 245                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 246         g_return_val_if_fail(partinfo != NULL, FALSE);
 247
 248         /* walk the tree and see whether there is a signature somewhere */
 249         do {
 250                 if (rfc2015_has_signature(partinfo))
 251                         return TRUE;
 252         } while ((partinfo = partinfo->parent) != NULL);
 253
 254         debug_print("mimeview_is_signed: FALSE\n" );
 255
 256         return FALSE;
 257 }
 258
 259 static void set_unchecked_signature(MimeInfo *mimeinfo)
 260 {
 261         MimeInfo *sig_partinfo;
 262
 263         sig_partinfo = rfc2015_find_signature(mimeinfo);
 264         if (sig_partinfo == NULL) return;
 265
 266         g_free(sig_partinfo->sigstatus);
 267         sig_partinfo->sigstatus =
 268                 g_strdup(_("Select \"Check signature\" to check"));
 269
 270         g_free(sig_partinfo->sigstatus_full);
 271         sig_partinfo->sigstatus_full = NULL;
 272 }
 273 #endif /* USE_GPGME */
 274
 275 void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
 276                            const gchar *file)
 277 {
 278         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 279         GtkCTreeNode *node;
 280         gchar buf[BUFFSIZE];
 281         FILE *fp;
 282
 283         mimeview_clear(mimeview);
 284         textview_clear(mimeview->messageview->textview);
 285
 286         g_return_if_fail(file != NULL);
 287         g_return_if_fail(mimeinfo != NULL);
 288
 289         mimeview->mimeinfo = mimeinfo;
 290
 291         if ((fp = fopen(file, "rb")) == NULL) {
 292                 FILE_OP_ERROR(file, "fopen");
 293                 return;
 294         }
 295         mimeview->file = g_strdup(file);
 296
 297         /* skip MIME part headers */
 298         if (mimeinfo->mime_type == MIME_MULTIPART) {
 299                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 300                         perror("fseek");
 301                 while (fgets(buf, sizeof(buf), fp) != NULL)
 302                         if (buf[0] == '\r' || buf[0] == '\n') break;
 303         }
 304
 305         procmime_scan_multipart_message(mimeinfo, fp);
 306 #if USE_GPGME
 307         if (prefs_common.auto_check_signatures)
 308                 rfc2015_check_signature(mimeinfo, fp);
 309         else
 310                 set_unchecked_signature(mimeinfo);
 311 #endif
 312
 313         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 314                                          mimeview);
 315
 316         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 317
 318         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 319                                            mimeview_selected, mimeview);
 320
 321         /* search first text part */
 322         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 323              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 324                 MimeInfo *partinfo;
 325
 326                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 327                 if (partinfo &&
 328                     (partinfo->mime_type == MIME_TEXT ||
 329                      partinfo->mime_type == MIME_TEXT_HTML))
 330                         break;
 331         }
 332         fclose(fp);
 333         textview_show_message(mimeview->messageview->textview, mimeinfo, file);
 334
 335         if (!node)
 336                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 337
 338         if (node) {
 339                 gtk_ctree_select(ctree, node);
 340                 gtkut_ctree_set_focus_row(ctree, node);
 341                 gtk_widget_grab_focus(mimeview->ctree);
 342         }
 343 }
 344
 345 void mimeview_destroy(MimeView *mimeview)
 346 {
 347         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 348         g_free(mimeview->file);
 349         g_free(mimeview);
 350 }
 351
 352 static void mimeview_set_multipart_tree(MimeView *mimeview,
 353                                         MimeInfo *mimeinfo,
 354                                         GtkCTreeNode *parent)
 355 {
 356         GtkCTreeNode *current = parent;
 357
 358         g_return_if_fail(mimeinfo != NULL);
 359
 360         if (!mimeinfo->sub && mimeinfo->parent)
 361                 current = mimeview_append_part(mimeview, mimeinfo, parent);
 362
 363         if (mimeinfo->sub)
 364                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, current);
 365
 366         if (mimeinfo->children)
 367                 mimeview_set_multipart_tree(mimeview, mimeinfo->children, current);
 368
 369         if (mimeinfo->next)
 370                 mimeview_set_multipart_tree(mimeview, mimeinfo->next, parent);
 371 }
 372
 373 static gchar *get_part_name(MimeInfo *partinfo)
 374 {
 375 #if USE_GPGME
 376         if (partinfo->sigstatus)
 377                 return partinfo->sigstatus;
 378         else
 379 #endif
 380         if (partinfo->name)
 381                 return partinfo->name;
 382         else if (partinfo->filename)
 383                 return partinfo->filename;
 384         else
 385                 return "";
 386 }
 387
 388 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 389                                           MimeInfo *partinfo,
 390                                           GtkCTreeNode *parent)
 391 {
 392         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 393         GtkCTreeNode *node;
 394         gchar *str[N_MIMEVIEW_COLS];
 395
 396         str[COL_MIMETYPE] =
 397                 partinfo->content_type ? partinfo->content_type : "";
 398         str[COL_SIZE] = to_human_readable(partinfo->size);
 399         str[COL_NAME] = get_part_name(partinfo);
 400
 401         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 402                                      NULL, NULL, NULL, NULL,
 403                                      FALSE, TRUE);
 404         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 405
 406         return node;
 407 }
 408
 409 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 410 {
 411         FILE *fp;
 412         const gchar *fname;
 413 #if USE_GPGME
 414         MimeInfo *pi;
 415 #endif
 416
 417         if (!partinfo) return;
 418
 419 #if USE_GPGME
 420         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 421                 ;
 422         fname = pi ? pi->plaintextfile : mimeview->file;
 423 #else
 424         fname = mimeview->file;
 425 #endif /* USE_GPGME */
 426         if (!fname) return;
 427
 428         if ((fp = fopen(fname, "rb")) == NULL) {
 429                 FILE_OP_ERROR(fname, "fopen");
 430                 return;
 431         }
 432
 433         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 434                 FILE_OP_ERROR(mimeview->file, "fseek");
 435                 fclose(fp);
 436                 return;
 437         }
 438
 439         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 440         textview_show_part(mimeview->textview, partinfo, fp);
 441
 442         fclose(fp);
 443 }
 444
 445 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 446 {
 447         gchar *filename;
 448
 449         if (!partinfo) return;
 450
 451         filename = procmime_get_tmp_file_name(partinfo);
 452
 453         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 454                 alertpanel_error
 455                         (_("Can't get the part of multipart message."));
 456         else {
 457                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 458                 /* Workaround for the GTK+ bug with handling scroll adjustments
 459                  * in GtkViewport */
 460                 imageview_clear(mimeview->imageview);
 461                 imageview_show_image(mimeview->imageview, partinfo, filename);
 462                 unlink(filename);
 463         }
 464
 465         g_free(filename);
 466 }
 467
 468 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 469 {
 470         TextView  *textview  = mimeview->textview;
 471         ImageView *imageview = mimeview->imageview;
 472         GList *children;
 473
 474         if (mimeview->type == type) return;
 475
 476         children = gtk_container_children(GTK_CONTAINER(mimeview->mime_vbox));
 477         if (children) {
 478                 gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
 479                                        GTK_WIDGET(children->data));
 480                 g_list_free(children);
 481         }
 482
 483         switch (type) {
 484         case MIMEVIEW_IMAGE:
 485                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 486                                   GTK_WIDGET_PTR(imageview));
 487                 break;
 488         case MIMEVIEW_TEXT:
 489                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 490                                   GTK_WIDGET_PTR(textview));
 491                 break;
 492         default:
 493                 return;
 494         }
 495
 496         mimeview->type = type;
 497 }
 498
 499 static void mimeview_clear(MimeView *mimeview)
 500 {
 501         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 502
 503         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 504         mimeview->mimeinfo = NULL;
 505
 506         gtk_clist_clear(clist);
 507         textview_clear(mimeview->textview);
 508         imageview_clear(mimeview->imageview);
 509
 510         mimeview->opened = NULL;
 511
 512         g_free(mimeview->file);
 513         mimeview->file = NULL;
 514
 515         /* gtk_notebook_set_page(GTK_NOTEBOOK(mimeview->notebook), 0); */
 516 }
 517
 518 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 519                               MimeView *mimeview)
 520 {
 521         MimeInfo *partinfo;
 522
 523         if (mimeview->opened == node) return;
 524         mimeview->opened = node;
 525         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 526
 527         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 528         if (!partinfo) return;
 529
 530         /* ungrab the mouse event */
 531         if (GTK_WIDGET_HAS_GRAB(ctree)) {
 532                 gtk_grab_remove(GTK_WIDGET(ctree));
 533                 if (gdk_pointer_is_grabbed())
 534                         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 535         }
 536
 537         switch (partinfo->mime_type) {
 538         case MIME_TEXT:
 539         case MIME_TEXT_HTML:
 540         case MIME_TEXT_ENRICHED:
 541         case MIME_MESSAGE_RFC822:
 542         case MIME_MULTIPART:
 543                 mimeview_show_message_part(mimeview, partinfo);
 544                 break;
 545 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 546         case MIME_IMAGE:
 547                 mimeview_show_image_part(mimeview, partinfo);
 548                 break;
 549 #endif
 550         default:
 551                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 552 #if USE_GPGME
 553                 if (g_strcasecmp(partinfo->content_type,
 554                                  "application/pgp-signature") == 0)
 555                         textview_show_signature_part(mimeview->textview,
 556                                                      partinfo);
 557                 else
 558 #endif
 559                         textview_show_mime_part(mimeview->textview, partinfo);
 560                 break;
 561         }
 562 }
 563
 564 static void mimeview_start_drag(GtkWidget *widget, gint button,
 565                                 GdkEvent *event, MimeView *mimeview)
 566 {
 567         GtkTargetList *list;
 568         GdkDragContext *context;
 569         MimeInfo *partinfo;
 570         GtkCTree *ctree;
 571
 572         g_return_if_fail(mimeview != NULL);
 573         ctree = GTK_CTREE(mimeview->ctree);
 574         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 575         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 576
 577         list = gtk_target_list_new(mimeview_mime_types, 1);
 578         context = gtk_drag_begin(widget, list,
 579                                  GDK_ACTION_COPY, button, event);
 580         gtk_drag_set_icon_default(context);
 581 }
 582
 583 static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 584                                     MimeView *mimeview)
 585 {
 586         GtkCList *clist = GTK_CLIST(widget);
 587         MimeInfo *partinfo;
 588         gint row, column;
 589
 590         if (!event) return FALSE;
 591
 592         if (event->button == 2 || event->button == 3) {
 593                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 594                                                   &row, &column))
 595                         return FALSE;
 596                 gtk_clist_unselect_all(clist);
 597                 gtk_clist_select_row(clist, row, column);
 598                 gtkut_clist_set_focus_row(clist, row);
 599         }
 600
 601         if (event->button == 2 ||
 602             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 603                 /* call external program for image, audio or html */
 604                 mimeview_launch(mimeview);
 605         } else if (event->button == 3) {
 606                 partinfo = gtk_ctree_node_get_row_data
 607                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 608                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 609                                  partinfo->mime_type == MIME_TEXT_HTML ||
 610                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 611                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 612                                  partinfo->mime_type == MIME_IMAGE ||
 613                                  partinfo->mime_type == MIME_MULTIPART))
 614                         menu_set_sensitive(mimeview->popupfactory,
 615                                            "/Display as text", FALSE);
 616                 else
 617                         menu_set_sensitive(mimeview->popupfactory,
 618                                            "/Display as text", TRUE);
 619                 if (partinfo &&
 620                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 621                         menu_set_sensitive(mimeview->popupfactory,
 622                                            "/Open", FALSE);
 623                 else
 624                         menu_set_sensitive(mimeview->popupfactory,
 625                                            "/Open", TRUE);
 626 #if USE_GPGME
 627                 menu_set_sensitive(mimeview->popupfactory,
 628                                    "/Check signature",
 629                                    mimeview_is_signed(mimeview));
 630 #endif
 631
 632                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 633                                NULL, NULL, NULL, NULL,
 634                                event->button, event->time);
 635         }
 636
 637         return TRUE;
 638 }
 639
 640 void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
 641 {
 642         mimeview_key_pressed(mimeview->ctree, event, mimeview);
 643 }
 644
 645 #define BREAK_ON_MODIFIER_KEY() \
 646         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 647
 648 #define KEY_PRESS_EVENT_STOP() \
 649         if (gtk_signal_n_emissions_by_name \
 650                 (GTK_OBJECT(ctree), "key_press_event") > 0) { \
 651                 gtk_signal_emit_stop_by_name(GTK_OBJECT(ctree), \
 652                                              "key_press_event"); \
 653         }
 654
 655 static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 656                                  MimeView *mimeview)
 657 {
 658         SummaryView *summaryview;
 659         GtkCTree *ctree = GTK_CTREE(widget);
 660         GtkCTreeNode *node;
 661
 662         if (!event) return FALSE;
 663         if (!mimeview->opened) return FALSE;
 664
 665         switch (event->keyval) {
 666         case GDK_space:
 667                 if (textview_scroll_page(mimeview->textview, FALSE))
 668                         return TRUE;
 669
 670                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 671                 if (node) {
 672                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 673                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 674                         return TRUE;
 675                 }
 676                 break;
 677         case GDK_BackSpace:
 678                 textview_scroll_page(mimeview->textview, TRUE);
 679                 return TRUE;
 680         case GDK_Return:
 681                 textview_scroll_one_line(mimeview->textview,
 682                                          (event->state & GDK_MOD1_MASK) != 0);
 683                 return TRUE;
 684         case GDK_n:
 685         case GDK_N:
 686                 BREAK_ON_MODIFIER_KEY();
 687                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 688                 KEY_PRESS_EVENT_STOP();
 689
 690                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 691                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 692                 return TRUE;
 693         case GDK_p:
 694         case GDK_P:
 695                 BREAK_ON_MODIFIER_KEY();
 696                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 697                 KEY_PRESS_EVENT_STOP();
 698
 699                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 700                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 701                 return TRUE;
 702         case GDK_y:
 703                 BREAK_ON_MODIFIER_KEY();
 704                 KEY_PRESS_EVENT_STOP();
 705                 mimeview_save_as(mimeview);
 706                 return TRUE;
 707         case GDK_t:
 708                 BREAK_ON_MODIFIER_KEY();
 709                 KEY_PRESS_EVENT_STOP();
 710                 mimeview_display_as_text(mimeview);
 711                 return TRUE;
 712         case GDK_l:
 713                 BREAK_ON_MODIFIER_KEY();
 714                 KEY_PRESS_EVENT_STOP();
 715                 mimeview_launch(mimeview);
 716                 return TRUE;
 717         default:
 718                 break;
 719         }
 720
 721         if (!mimeview->messageview->mainwin) return FALSE;
 722         summaryview = mimeview->messageview->mainwin->summaryview;
 723         summary_pass_key_press_event(summaryview, event);
 724         return TRUE;
 725 }
 726
 727 static void mimeview_drag_data_get(GtkWidget        *widget,
 728                                    GdkDragContext   *drag_context,
 729                                    GtkSelectionData *selection_data,
 730                                    guint             info,
 731                                    guint             time,
 732                                    MimeView         *mimeview)
 733 {
 734         gchar *filename, *uriname;
 735         MimeInfo *partinfo;
 736
 737         if (!mimeview->opened) return;
 738         if (!mimeview->file) return;
 739
 740         partinfo = gtk_ctree_node_get_row_data
 741                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 742         if (!partinfo) return;
 743         if (!partinfo->filename && !partinfo->name) return;
 744
 745         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 746         filename = g_basename(filename);
 747         if (*filename == '\0') return;
 748
 749         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 750                                filename, NULL);
 751
 752         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 753                 alertpanel_error
 754                         (_("Can't save the part of multipart message."));
 755
 756         uriname = g_strconcat("file:/", filename, NULL);
 757         gtk_selection_data_set(selection_data, selection_data->target, 8,
 758                                uriname, strlen(uriname));
 759
 760         g_free(uriname);
 761         g_free(filename);
 762 }
 763
 764 static void mimeview_display_as_text(MimeView *mimeview)
 765 {
 766         MimeInfo *partinfo;
 767
 768         if (!mimeview->opened) return;
 769
 770         partinfo = gtk_ctree_node_get_row_data
 771                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 772         mimeview_show_message_part(mimeview, partinfo);
 773 }
 774
 775 static void mimeview_save_as(MimeView *mimeview)
 776 {
 777         gchar *filename;
 778         gchar *defname = NULL;
 779         MimeInfo *partinfo;
 780
 781         if (!mimeview->opened) return;
 782         if (!mimeview->file) return;
 783
 784         partinfo = gtk_ctree_node_get_row_data
 785                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 786         g_return_if_fail(partinfo != NULL);
 787
 788         if (partinfo->filename)
 789                 defname = partinfo->filename;
 790         else if (partinfo->name) {
 791                 Xstrdup_a(defname, partinfo->name, return);
 792                 subst_for_filename(defname);
 793         }
 794
 795         filename = filesel_select_file(_("Save as"), defname);
 796         if (!filename) return;
 797         if (is_file_exist(filename)) {
 798                 AlertValue aval;
 799
 800                 aval = alertpanel(_("Overwrite"),
 801                                   _("Overwrite existing file?"),
 802                                   _("OK"), _("Cancel"), NULL);
 803                 if (G_ALERTDEFAULT != aval) return;
 804         }
 805
 806         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 807                 alertpanel_error
 808                         (_("Can't save the part of multipart message."));
 809 }
 810
 811 static void mimeview_launch(MimeView *mimeview)
 812 {
 813         MimeInfo *partinfo;
 814         gchar *filename;
 815
 816         if (!mimeview->opened) return;
 817         if (!mimeview->file) return;
 818
 819         partinfo = gtk_ctree_node_get_row_data
 820                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 821         g_return_if_fail(partinfo != NULL);
 822
 823         filename = procmime_get_tmp_file_name(partinfo);
 824
 825         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 826                 alertpanel_error
 827                         (_("Can't save the part of multipart message."));
 828         else
 829                 mimeview_view_file(filename, partinfo, NULL);
 830
 831         g_free(filename);
 832 }
 833
 834 static void mimeview_open_with(MimeView *mimeview)
 835 {
 836         MimeInfo *partinfo;
 837         gchar *filename;
 838         gchar *cmd;
 839
 840         if (!mimeview->opened) return;
 841         if (!mimeview->file) return;
 842
 843         partinfo = gtk_ctree_node_get_row_data
 844                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 845         g_return_if_fail(partinfo != NULL);
 846
 847         filename = procmime_get_tmp_file_name(partinfo);
 848
 849         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
 850                 alertpanel_error
 851                         (_("Can't save the part of multipart message."));
 852                 g_free(filename);
 853                 return;
 854         }
 855
 856         if (!prefs_common.mime_open_cmd_history)
 857                 prefs_common.mime_open_cmd_history =
 858                         add_history(NULL, prefs_common.mime_open_cmd);
 859
 860         cmd = input_dialog_combo
 861                 (_("Open with"),
 862                  _("Enter the command line to open file:\n"
 863                    "(`%s' will be replaced with file name)"),
 864                  prefs_common.mime_open_cmd,
 865                  prefs_common.mime_open_cmd_history);
 866         if (cmd) {
 867                 mimeview_view_file(filename, partinfo, cmd);
 868                 g_free(prefs_common.mime_open_cmd);
 869                 prefs_common.mime_open_cmd = cmd;
 870                 prefs_common.mime_open_cmd_history =
 871                         add_history(prefs_common.mime_open_cmd_history, cmd);
 872         }
 873
 874         g_free(filename);
 875 }
 876
 877 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
 878                                const gchar *cmdline)
 879 {
 880         static gchar *default_image_cmdline = "display '%s'";
 881         static gchar *default_audio_cmdline = "play '%s'";
 882         static gchar *default_html_cmdline =
 883                 "netscape -remote 'openURL(%s,raise)'";
 884         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
 885         gchar buf[1024];
 886         gchar m_buf[1024];
 887         const gchar *cmd;
 888         const gchar *def_cmd;
 889         const gchar *p;
 890
 891         if (cmdline) {
 892                 cmd = cmdline;
 893                 def_cmd = NULL;
 894         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 895                 return;
 896         } else if (MIME_IMAGE == partinfo->mime_type) {
 897                 cmd = prefs_common.mime_image_viewer;
 898                 def_cmd = default_image_cmdline;
 899         } else if (MIME_AUDIO == partinfo->mime_type) {
 900                 cmd = prefs_common.mime_audio_player;
 901                 def_cmd = default_audio_cmdline;
 902         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
 903                 cmd = prefs_common.uri_cmd;
 904                 def_cmd = default_html_cmdline;
 905         } else {
 906                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
 907                            partinfo->content_type, "%s");
 908                 cmd = m_buf;
 909                 def_cmd = NULL;
 910         }
 911
 912         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
 913             !strchr(p + 2, '%'))
 914                 g_snprintf(buf, sizeof(buf), cmd, filename);
 915         else {
 916                 if (cmd)
 917                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
 918                 if (def_cmd)
 919                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
 920                 else
 921                         return;
 922         }
 923
 924         execute_command_line(buf, TRUE);
 925 }
 926
 927 #if USE_GPGME
 928 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
 929                              gpointer data)
 930 {
 931         MimeInfo *partinfo;
 932         gchar *part_name;
 933
 934         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 935         g_return_if_fail(partinfo != NULL);
 936
 937         part_name = get_part_name(partinfo);
 938         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
 939 }
 940
 941 static void mimeview_update_names(MimeView *mimeview)
 942 {
 943         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 944
 945         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
 946 }
 947
 948 static void mimeview_update_signature_info(MimeView *mimeview)
 949 {
 950         MimeInfo *partinfo;
 951
 952         if (!mimeview) return;
 953         if (!mimeview->opened) return;
 954
 955         partinfo = gtk_ctree_node_get_row_data
 956                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 957         if (!partinfo) return;
 958
 959         if (g_strcasecmp(partinfo->content_type,
 960                          "application/pgp-signature") == 0) {
 961                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 962                 textview_show_signature_part(mimeview->textview, partinfo);
 963         }
 964 }
 965
 966 static void mimeview_check_signature(MimeView *mimeview)
 967 {
 968         MimeInfo *mimeinfo;
 969         gchar buf[BUFFSIZE];
 970         FILE *fp;
 971
 972         g_return_if_fail (mimeview_is_signed(mimeview));
 973
 974         mimeinfo = gtk_ctree_node_get_row_data
 975                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 976         g_return_if_fail(mimeinfo != NULL);
 977         g_return_if_fail(mimeview->file != NULL);
 978
 979         while (mimeinfo->parent)
 980                 mimeinfo = mimeinfo->parent;
 981
 982         if ((fp = fopen(mimeview->file, "rb")) == NULL) {
 983                 FILE_OP_ERROR(mimeview->file, "fopen");
 984                 return;
 985         }
 986
 987         /* skip headers */
 988         if (mimeinfo->mime_type == MIME_MULTIPART) {
 989                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 990                 FILE_OP_ERROR(mimeview->file, "fseek");
 991                 while (fgets(buf, sizeof(buf), fp) != NULL)
 992                         if (buf[0] == '\r' || buf[0] == '\n') break;
 993         }
 994
 995         procmime_scan_multipart_message(mimeinfo, fp);
 996         rfc2015_check_signature(mimeinfo, fp);
 997         fclose(fp);
 998
 999         mimeview_update_names(mimeview);
1000         mimeview_update_signature_info(mimeview);
1001 }
1002 #endif /* USE_GPGME */