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_show_image         (MimeView       *mimeview);
 104 static void mimeview_save_as            (MimeView       *mimeview);
 105 static void mimeview_launch             (MimeView       *mimeview);
 106 static void mimeview_open_with          (MimeView       *mimeview);
 107 static void mimeview_view_file          (const gchar    *filename,
 108                                          MimeInfo       *partinfo,
 109                                          const gchar    *cmdline);
 110 #if USE_GPGME
 111 static void mimeview_check_signature    (MimeView       *mimeview);
 112 #endif
 113
 114 static GtkItemFactoryEntry mimeview_popup_entries[] =
 115 {
 116         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 117         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 118         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 119         {N_("/_Display image"),   NULL, mimeview_show_image,      0, NULL},
 120         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL}
 121 #if USE_GPGME
 122         ,
 123         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 124 #endif
 125 };
 126
 127 static GtkTargetEntry mimeview_mime_types[] =
 128 {
 129         {"text/uri-list", 0, 0}
 130 };
 131
 132 MimeView *mimeview_create(void)
 133 {
 134         MimeView *mimeview;
 135
 136         GtkWidget *notebook;
 137         GtkWidget *vbox;
 138         GtkWidget *paned;
 139         GtkWidget *scrolledwin;
 140         GtkWidget *ctree;
 141         GtkWidget *mime_vbox;
 142         GtkWidget *popupmenu;
 143         GtkItemFactory *popupfactory;
 144         gchar *titles[N_MIMEVIEW_COLS];
 145         gint n_entries;
 146         gint i;
 147
 148         debug_print(_("Creating MIME view...\n"));
 149         mimeview = g_new0(MimeView, 1);
 150
 151         titles[COL_MIMETYPE] = _("MIME Type");
 152         titles[COL_SIZE]     = _("Size");
 153         titles[COL_NAME]     = _("Name");
 154
 155         notebook = gtk_notebook_new();
 156         gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook), TRUE);
 157
 158         vbox = gtk_vbox_new(FALSE, 0);
 159         gtk_container_add(GTK_CONTAINER(notebook), vbox);
 160         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), vbox,
 161                                         _("Text"));
 162
 163         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 164         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 165                                        GTK_POLICY_AUTOMATIC,
 166                                        GTK_POLICY_ALWAYS);
 167         gtk_widget_set_usize(scrolledwin, -1, 80);
 168
 169         ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
 170         gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);
 171         gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
 172         gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
 173                                            GTK_JUSTIFY_RIGHT);
 174         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
 175         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
 176         for (i = 0; i < N_MIMEVIEW_COLS; i++)
 177                 GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
 178                                        GTK_CAN_FOCUS);
 179         gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
 180
 181         gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
 182                            GTK_SIGNAL_FUNC(mimeview_selected), mimeview);
 183         gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
 184                            GTK_SIGNAL_FUNC(mimeview_button_pressed), mimeview);
 185         gtk_signal_connect(GTK_OBJECT(ctree), "key_press_event",
 186                            GTK_SIGNAL_FUNC(mimeview_key_pressed), mimeview);
 187         gtk_signal_connect(GTK_OBJECT (ctree),"start_drag",
 188                            GTK_SIGNAL_FUNC (mimeview_start_drag), mimeview);
 189         gtk_signal_connect(GTK_OBJECT(ctree), "drag_data_get",
 190                            GTK_SIGNAL_FUNC(mimeview_drag_data_get), mimeview);
 191
 192         mime_vbox = gtk_vbox_new(FALSE, 0);
 193
 194         paned = gtk_vpaned_new();
 195         gtk_paned_add1(GTK_PANED(paned), scrolledwin);
 196         gtk_paned_add2(GTK_PANED(paned), mime_vbox);
 197         gtk_container_add(GTK_CONTAINER(notebook), paned);
 198         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), paned,
 199                                         _("Attachments"));
 200
 201         gtk_widget_show_all(notebook);
 202
 203         gtk_notebook_set_page(GTK_NOTEBOOK(notebook), 0);
 204
 205         n_entries = sizeof(mimeview_popup_entries) /
 206                 sizeof(mimeview_popup_entries[0]);
 207         popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
 208                                       "<MimeView>", &popupfactory, mimeview);
 209
 210         mimeview->notebook     = notebook;
 211         mimeview->vbox         = vbox;
 212         mimeview->paned        = paned;
 213         mimeview->scrolledwin  = scrolledwin;
 214         mimeview->ctree        = ctree;
 215         mimeview->mime_vbox    = mime_vbox;
 216         mimeview->popupmenu    = popupmenu;
 217         mimeview->popupfactory = popupfactory;
 218         mimeview->type         = -1;
 219
 220         return mimeview;
 221 }
 222
 223 void mimeview_init(MimeView *mimeview)
 224 {
 225 }
 226
 227 /*
 228  * Check whether the message is OpenPGP signed
 229  */
 230 #if USE_GPGME
 231 static gboolean mimeview_is_signed(MimeView *mimeview)
 232 {
 233         MimeInfo *partinfo = NULL;
 234
 235         debug_print("mimeview_is signed of %p\n", mimeview);
 236
 237         if (!mimeview) return FALSE;
 238         if (!mimeview->opened) return FALSE;
 239
 240         debug_print("mimeview_is_signed: open\n" );
 241
 242         if (!mimeview->file) return FALSE;
 243
 244         debug_print("mimeview_is_signed: file\n" );
 245
 246         partinfo = gtk_ctree_node_get_row_data
 247                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 248         g_return_val_if_fail(partinfo != NULL, FALSE);
 249
 250         /* walk the tree and see whether there is a signature somewhere */
 251         do {
 252                 if (rfc2015_has_signature(partinfo))
 253                         return TRUE;
 254         } while ((partinfo = partinfo->parent) != NULL);
 255
 256         debug_print("mimeview_is_signed: FALSE\n" );
 257
 258         return FALSE;
 259 }
 260
 261 static void set_unchecked_signature(MimeInfo *mimeinfo)
 262 {
 263         MimeInfo *sig_partinfo;
 264
 265         sig_partinfo = rfc2015_find_signature(mimeinfo);
 266         if (sig_partinfo == NULL) return;
 267
 268         g_free(sig_partinfo->sigstatus);
 269         sig_partinfo->sigstatus =
 270                 g_strdup(_("Select \"Check signature\" to check"));
 271
 272         g_free(sig_partinfo->sigstatus_full);
 273         sig_partinfo->sigstatus_full = NULL;
 274 }
 275 #endif /* USE_GPGME */
 276
 277 void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
 278                            const gchar *file)
 279 {
 280         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 281         GtkCTreeNode *node;
 282         gchar buf[BUFFSIZE];
 283         FILE *fp;
 284
 285         mimeview_clear(mimeview);
 286         textview_clear(mimeview->messageview->textview);
 287
 288         g_return_if_fail(file != NULL);
 289         g_return_if_fail(mimeinfo != NULL);
 290
 291         mimeview->mimeinfo = mimeinfo;
 292
 293         if ((fp = fopen(file, "rb")) == NULL) {
 294                 FILE_OP_ERROR(file, "fopen");
 295                 return;
 296         }
 297         mimeview->file = g_strdup(file);
 298
 299         /* skip MIME part headers */
 300         if (mimeinfo->mime_type == MIME_MULTIPART) {
 301                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 302                         perror("fseek");
 303                 while (fgets(buf, sizeof(buf), fp) != NULL)
 304                         if (buf[0] == '\r' || buf[0] == '\n') break;
 305         }
 306
 307         procmime_scan_multipart_message(mimeinfo, fp);
 308 #if USE_GPGME
 309         if (prefs_common.auto_check_signatures)
 310                 rfc2015_check_signature(mimeinfo, fp);
 311         else
 312                 set_unchecked_signature(mimeinfo);
 313 #endif
 314
 315         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 316                                          mimeview);
 317
 318         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 319
 320         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 321                                            mimeview_selected, mimeview);
 322
 323         /* search first text part */
 324         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 325              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 326                 MimeInfo *partinfo;
 327
 328                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 329                 if (partinfo &&
 330                     (partinfo->mime_type == MIME_TEXT ||
 331                      partinfo->mime_type == MIME_TEXT_HTML))
 332                         break;
 333         }
 334         fclose(fp);
 335         textview_show_message(mimeview->messageview->textview, mimeinfo, file);
 336
 337         if (!node)
 338                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 339
 340         if (node) {
 341                 gtk_ctree_select(ctree, node);
 342                 gtkut_ctree_set_focus_row(ctree, node);
 343                 gtk_widget_grab_focus(mimeview->ctree);
 344         }
 345 }
 346
 347 void mimeview_destroy(MimeView *mimeview)
 348 {
 349         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 350         g_free(mimeview->file);
 351         g_free(mimeview);
 352 }
 353
 354 static void mimeview_set_multipart_tree(MimeView *mimeview,
 355                                         MimeInfo *mimeinfo,
 356                                         GtkCTreeNode *parent)
 357 {
 358         GtkCTreeNode *current = parent;
 359
 360         g_return_if_fail(mimeinfo != NULL);
 361
 362         if (!mimeinfo->sub && mimeinfo->parent)
 363                 current = mimeview_append_part(mimeview, mimeinfo, parent);
 364
 365         if (mimeinfo->sub)
 366                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, current);
 367
 368         if (mimeinfo->children)
 369                 mimeview_set_multipart_tree(mimeview, mimeinfo->children, current);
 370
 371         if (mimeinfo->next)
 372                 mimeview_set_multipart_tree(mimeview, mimeinfo->next, parent);
 373 }
 374
 375 static gchar *get_part_name(MimeInfo *partinfo)
 376 {
 377 #if USE_GPGME
 378         if (partinfo->sigstatus)
 379                 return partinfo->sigstatus;
 380         else
 381 #endif
 382         if (partinfo->name)
 383                 return partinfo->name;
 384         else if (partinfo->filename)
 385                 return partinfo->filename;
 386         else
 387                 return "";
 388 }
 389
 390 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 391                                           MimeInfo *partinfo,
 392                                           GtkCTreeNode *parent)
 393 {
 394         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 395         GtkCTreeNode *node;
 396         gchar *str[N_MIMEVIEW_COLS];
 397
 398         str[COL_MIMETYPE] =
 399                 partinfo->content_type ? partinfo->content_type : "";
 400         str[COL_SIZE] = to_human_readable(partinfo->size);
 401         str[COL_NAME] = get_part_name(partinfo);
 402
 403         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 404                                      NULL, NULL, NULL, NULL,
 405                                      FALSE, TRUE);
 406         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 407
 408         return node;
 409 }
 410
 411 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 412 {
 413         FILE *fp;
 414         const gchar *fname;
 415 #if USE_GPGME
 416         MimeInfo *pi;
 417 #endif
 418
 419         if (!partinfo) return;
 420
 421 #if USE_GPGME
 422         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 423                 ;
 424         fname = pi ? pi->plaintextfile : mimeview->file;
 425 #else
 426         fname = mimeview->file;
 427 #endif /* USE_GPGME */
 428         if (!fname) return;
 429
 430         if ((fp = fopen(fname, "rb")) == NULL) {
 431                 FILE_OP_ERROR(fname, "fopen");
 432                 return;
 433         }
 434
 435         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 436                 FILE_OP_ERROR(mimeview->file, "fseek");
 437                 fclose(fp);
 438                 return;
 439         }
 440
 441         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 442         textview_show_part(mimeview->textview, partinfo, fp);
 443
 444         fclose(fp);
 445 }
 446
 447 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 448 {
 449         gchar *filename;
 450
 451         if (!partinfo) return;
 452
 453         filename = procmime_get_tmp_file_name(partinfo);
 454
 455         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 456                 alertpanel_error
 457                         (_("Can't get the part of multipart message."));
 458         else {
 459                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 460                 /* Workaround for the GTK+ bug with handling scroll adjustments
 461                  * in GtkViewport */
 462                 imageview_clear(mimeview->imageview);
 463                 imageview_show_image(mimeview->imageview, partinfo, filename);
 464                 unlink(filename);
 465         }
 466
 467         g_free(filename);
 468 }
 469
 470 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 471 {
 472         TextView  *textview  = mimeview->textview;
 473         ImageView *imageview = mimeview->imageview;
 474         GList *children;
 475
 476         if (mimeview->type == type) return;
 477
 478         children = gtk_container_children(GTK_CONTAINER(mimeview->mime_vbox));
 479         if (children) {
 480                 gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
 481                                        GTK_WIDGET(children->data));
 482                 g_list_free(children);
 483         }
 484
 485         switch (type) {
 486         case MIMEVIEW_IMAGE:
 487                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 488                                   GTK_WIDGET_PTR(imageview));
 489                 break;
 490         case MIMEVIEW_TEXT:
 491                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 492                                   GTK_WIDGET_PTR(textview));
 493                 break;
 494         default:
 495                 return;
 496         }
 497
 498         mimeview->type = type;
 499 }
 500
 501 static void mimeview_clear(MimeView *mimeview)
 502 {
 503         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 504
 505         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 506         mimeview->mimeinfo = NULL;
 507
 508         gtk_clist_clear(clist);
 509         textview_clear(mimeview->textview);
 510         imageview_clear(mimeview->imageview);
 511
 512         mimeview->opened = NULL;
 513
 514         g_free(mimeview->file);
 515         mimeview->file = NULL;
 516
 517         /* gtk_notebook_set_page(GTK_NOTEBOOK(mimeview->notebook), 0); */
 518 }
 519
 520 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 521                               MimeView *mimeview)
 522 {
 523         MimeInfo *partinfo;
 524
 525         if (mimeview->opened == node) return;
 526         mimeview->opened = node;
 527         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 528
 529         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 530         if (!partinfo) return;
 531
 532         /* ungrab the mouse event */
 533         if (GTK_WIDGET_HAS_GRAB(ctree)) {
 534                 gtk_grab_remove(GTK_WIDGET(ctree));
 535                 if (gdk_pointer_is_grabbed())
 536                         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 537         }
 538
 539         switch (partinfo->mime_type) {
 540         case MIME_TEXT:
 541         case MIME_TEXT_HTML:
 542         case MIME_TEXT_ENRICHED:
 543         case MIME_MESSAGE_RFC822:
 544         case MIME_MULTIPART:
 545                 mimeview_show_message_part(mimeview, partinfo);
 546                 break;
 547 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 548         case MIME_IMAGE:
 549                 if (prefs_common.display_img)
 550                         mimeview_show_image_part(mimeview, partinfo);
 551                 else
 552                         textview_show_mime_part(mimeview->textview, partinfo);
 553                 break;
 554 #endif
 555         default:
 556                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 557 #if USE_GPGME
 558                 if (g_strcasecmp(partinfo->content_type,
 559                                  "application/pgp-signature") == 0)
 560                         textview_show_signature_part(mimeview->textview,
 561                                                      partinfo);
 562                 else
 563 #endif
 564                         textview_show_mime_part(mimeview->textview, partinfo);
 565                 break;
 566         }
 567 }
 568
 569 static void mimeview_start_drag(GtkWidget *widget, gint button,
 570                                 GdkEvent *event, MimeView *mimeview)
 571 {
 572         GtkTargetList *list;
 573         GdkDragContext *context;
 574         MimeInfo *partinfo;
 575         GtkCTree *ctree;
 576
 577         g_return_if_fail(mimeview != NULL);
 578         ctree = GTK_CTREE(mimeview->ctree);
 579         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 580         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 581
 582         list = gtk_target_list_new(mimeview_mime_types, 1);
 583         context = gtk_drag_begin(widget, list,
 584                                  GDK_ACTION_COPY, button, event);
 585         gtk_drag_set_icon_default(context);
 586 }
 587
 588 static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 589                                     MimeView *mimeview)
 590 {
 591         GtkCList *clist = GTK_CLIST(widget);
 592         MimeInfo *partinfo;
 593         gint row, column;
 594
 595         if (!event) return FALSE;
 596
 597         if (event->button == 2 || event->button == 3) {
 598                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 599                                                   &row, &column))
 600                         return FALSE;
 601                 gtk_clist_unselect_all(clist);
 602                 gtk_clist_select_row(clist, row, column);
 603                 gtkut_clist_set_focus_row(clist, row);
 604         }
 605
 606         if (event->button == 2 ||
 607             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 608                 /* call external program for image, audio or html */
 609                 mimeview_launch(mimeview);
 610         } else if (event->button == 3) {
 611                 partinfo = gtk_ctree_node_get_row_data
 612                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 613                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 614                                  partinfo->mime_type == MIME_TEXT_HTML ||
 615                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 616                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 617                                  partinfo->mime_type == MIME_IMAGE ||
 618                                  partinfo->mime_type == MIME_MULTIPART))
 619                         menu_set_sensitive(mimeview->popupfactory,
 620                                            "/Display as text", FALSE);
 621                 else
 622                         menu_set_sensitive(mimeview->popupfactory,
 623                                            "/Display as text", TRUE);
 624                 if (partinfo &&
 625                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 626                         menu_set_sensitive(mimeview->popupfactory,
 627                                            "/Open", FALSE);
 628                 else
 629                         menu_set_sensitive(mimeview->popupfactory,
 630                                            "/Open", TRUE);
 631
 632 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 633                 if (partinfo && (partinfo->mime_type == MIME_IMAGE))
 634                         menu_set_sensitive(mimeview->popupfactory,
 635                                            "/Display image", TRUE);
 636 #endif
 637 #if USE_GPGME
 638                 menu_set_sensitive(mimeview->popupfactory,
 639                                    "/Check signature",
 640                                    mimeview_is_signed(mimeview));
 641 #endif
 642
 643                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 644                                NULL, NULL, NULL, NULL,
 645                                event->button, event->time);
 646         }
 647
 648         return TRUE;
 649 }
 650
 651 void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
 652 {
 653         mimeview_key_pressed(mimeview->ctree, event, mimeview);
 654 }
 655
 656 #define BREAK_ON_MODIFIER_KEY() \
 657         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 658
 659 #define KEY_PRESS_EVENT_STOP() \
 660         if (gtk_signal_n_emissions_by_name \
 661                 (GTK_OBJECT(ctree), "key_press_event") > 0) { \
 662                 gtk_signal_emit_stop_by_name(GTK_OBJECT(ctree), \
 663                                              "key_press_event"); \
 664         }
 665
 666 static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 667                                  MimeView *mimeview)
 668 {
 669         SummaryView *summaryview;
 670         GtkCTree *ctree = GTK_CTREE(widget);
 671         GtkCTreeNode *node;
 672
 673         if (!event) return FALSE;
 674         if (!mimeview->opened) return FALSE;
 675
 676         switch (event->keyval) {
 677         case GDK_space:
 678                 if (textview_scroll_page(mimeview->textview, FALSE))
 679                         return TRUE;
 680
 681                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 682                 if (node) {
 683                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 684                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 685                         return TRUE;
 686                 }
 687                 break;
 688         case GDK_BackSpace:
 689                 textview_scroll_page(mimeview->textview, TRUE);
 690                 return TRUE;
 691         case GDK_Return:
 692                 textview_scroll_one_line(mimeview->textview,
 693                                          (event->state & GDK_MOD1_MASK) != 0);
 694                 return TRUE;
 695         case GDK_n:
 696         case GDK_N:
 697                 BREAK_ON_MODIFIER_KEY();
 698                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 699                 KEY_PRESS_EVENT_STOP();
 700
 701                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 702                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 703                 return TRUE;
 704         case GDK_p:
 705         case GDK_P:
 706                 BREAK_ON_MODIFIER_KEY();
 707                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 708                 KEY_PRESS_EVENT_STOP();
 709
 710                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 711                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 712                 return TRUE;
 713         case GDK_y:
 714                 BREAK_ON_MODIFIER_KEY();
 715                 KEY_PRESS_EVENT_STOP();
 716                 mimeview_save_as(mimeview);
 717                 return TRUE;
 718         case GDK_t:
 719                 BREAK_ON_MODIFIER_KEY();
 720                 KEY_PRESS_EVENT_STOP();
 721                 mimeview_display_as_text(mimeview);
 722                 return TRUE;
 723         case GDK_i:
 724                 BREAK_ON_MODIFIER_KEY();
 725                 KEY_PRESS_EVENT_STOP();
 726                 mimeview_show_image(mimeview);
 727                 return TRUE;
 728         case GDK_l:
 729                 BREAK_ON_MODIFIER_KEY();
 730                 KEY_PRESS_EVENT_STOP();
 731                 mimeview_launch(mimeview);
 732                 return TRUE;
 733         default:
 734                 break;
 735         }
 736
 737         if (!mimeview->messageview->mainwin) return FALSE;
 738         summaryview = mimeview->messageview->mainwin->summaryview;
 739         summary_pass_key_press_event(summaryview, event);
 740         return TRUE;
 741 }
 742
 743 static void mimeview_drag_data_get(GtkWidget        *widget,
 744                                    GdkDragContext   *drag_context,
 745                                    GtkSelectionData *selection_data,
 746                                    guint             info,
 747                                    guint             time,
 748                                    MimeView         *mimeview)
 749 {
 750         gchar *filename, *uriname;
 751         MimeInfo *partinfo;
 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         if (!partinfo) return;
 759         if (!partinfo->filename && !partinfo->name) return;
 760
 761         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 762         filename = g_basename(filename);
 763         if (*filename == '\0') return;
 764
 765         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 766                                filename, NULL);
 767
 768         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 769                 alertpanel_error
 770                         (_("Can't save the part of multipart message."));
 771
 772         uriname = g_strconcat("file:/", filename, NULL);
 773         gtk_selection_data_set(selection_data, selection_data->target, 8,
 774                                uriname, strlen(uriname));
 775
 776         g_free(uriname);
 777         g_free(filename);
 778 }
 779
 780 static void mimeview_display_as_text(MimeView *mimeview)
 781 {
 782         MimeInfo *partinfo;
 783
 784         if (!mimeview->opened) return;
 785
 786         partinfo = gtk_ctree_node_get_row_data
 787                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 788         mimeview_show_message_part(mimeview, partinfo);
 789 }
 790
 791 static void mimeview_show_image(MimeView *mimeview)
 792 {
 793         MimeInfo *partinfo;
 794
 795         if (!mimeview->opened) return;
 796
 797         partinfo = gtk_ctree_node_get_row_data
 798                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 799         mimeview_show_image_part(mimeview, partinfo);
 800 }
 801
 802 static void mimeview_save_as(MimeView *mimeview)
 803 {
 804         gchar *filename;
 805         gchar *defname = NULL;
 806         MimeInfo *partinfo;
 807
 808         if (!mimeview->opened) return;
 809         if (!mimeview->file) return;
 810
 811         partinfo = gtk_ctree_node_get_row_data
 812                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 813         g_return_if_fail(partinfo != NULL);
 814
 815         if (partinfo->filename)
 816                 defname = partinfo->filename;
 817         else if (partinfo->name) {
 818                 Xstrdup_a(defname, partinfo->name, return);
 819                 subst_for_filename(defname);
 820         }
 821
 822         filename = filesel_select_file(_("Save as"), defname);
 823         if (!filename) return;
 824         if (is_file_exist(filename)) {
 825                 AlertValue aval;
 826
 827                 aval = alertpanel(_("Overwrite"),
 828                                   _("Overwrite existing file?"),
 829                                   _("OK"), _("Cancel"), NULL);
 830                 if (G_ALERTDEFAULT != aval) return;
 831         }
 832
 833         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 834                 alertpanel_error
 835                         (_("Can't save the part of multipart message."));
 836 }
 837
 838 static void mimeview_launch(MimeView *mimeview)
 839 {
 840         MimeInfo *partinfo;
 841         gchar *filename;
 842
 843         if (!mimeview->opened) return;
 844         if (!mimeview->file) return;
 845
 846         partinfo = gtk_ctree_node_get_row_data
 847                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 848         g_return_if_fail(partinfo != NULL);
 849
 850         filename = procmime_get_tmp_file_name(partinfo);
 851
 852         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 853                 alertpanel_error
 854                         (_("Can't save the part of multipart message."));
 855         else
 856                 mimeview_view_file(filename, partinfo, NULL);
 857
 858         g_free(filename);
 859 }
 860
 861 static void mimeview_open_with(MimeView *mimeview)
 862 {
 863         MimeInfo *partinfo;
 864         gchar *filename;
 865         gchar *cmd;
 866
 867         if (!mimeview->opened) return;
 868         if (!mimeview->file) return;
 869
 870         partinfo = gtk_ctree_node_get_row_data
 871                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 872         g_return_if_fail(partinfo != NULL);
 873
 874         filename = procmime_get_tmp_file_name(partinfo);
 875
 876         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
 877                 alertpanel_error
 878                         (_("Can't save the part of multipart message."));
 879                 g_free(filename);
 880                 return;
 881         }
 882
 883         if (!prefs_common.mime_open_cmd_history)
 884                 prefs_common.mime_open_cmd_history =
 885                         add_history(NULL, prefs_common.mime_open_cmd);
 886
 887         cmd = input_dialog_combo
 888                 (_("Open with"),
 889                  _("Enter the command line to open file:\n"
 890                    "(`%s' will be replaced with file name)"),
 891                  prefs_common.mime_open_cmd,
 892                  prefs_common.mime_open_cmd_history,
 893                  TRUE);
 894         if (cmd) {
 895                 mimeview_view_file(filename, partinfo, cmd);
 896                 g_free(prefs_common.mime_open_cmd);
 897                 prefs_common.mime_open_cmd = cmd;
 898                 prefs_common.mime_open_cmd_history =
 899                         add_history(prefs_common.mime_open_cmd_history, cmd);
 900         }
 901
 902         g_free(filename);
 903 }
 904
 905 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
 906                                const gchar *cmdline)
 907 {
 908         static gchar *default_image_cmdline = "display '%s'";
 909         static gchar *default_audio_cmdline = "play '%s'";
 910         static gchar *default_html_cmdline =
 911                 "netscape -remote 'openURL(%s,raise)'";
 912         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
 913         gchar buf[1024];
 914         gchar m_buf[1024];
 915         const gchar *cmd;
 916         const gchar *def_cmd;
 917         const gchar *p;
 918
 919         if (cmdline) {
 920                 cmd = cmdline;
 921                 def_cmd = NULL;
 922         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 923                 return;
 924         } else if (MIME_IMAGE == partinfo->mime_type) {
 925                 cmd = prefs_common.mime_image_viewer;
 926                 def_cmd = default_image_cmdline;
 927         } else if (MIME_AUDIO == partinfo->mime_type) {
 928                 cmd = prefs_common.mime_audio_player;
 929                 def_cmd = default_audio_cmdline;
 930         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
 931                 cmd = prefs_common.uri_cmd;
 932                 def_cmd = default_html_cmdline;
 933         } else {
 934                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
 935                            partinfo->content_type, "%s");
 936                 cmd = m_buf;
 937                 def_cmd = NULL;
 938         }
 939
 940         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
 941             !strchr(p + 2, '%'))
 942                 g_snprintf(buf, sizeof(buf), cmd, filename);
 943         else {
 944                 if (cmd)
 945                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
 946                 if (def_cmd)
 947                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
 948                 else
 949                         return;
 950         }
 951
 952         execute_command_line(buf, TRUE);
 953 }
 954
 955 #if USE_GPGME
 956 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
 957                              gpointer data)
 958 {
 959         MimeInfo *partinfo;
 960         gchar *part_name;
 961
 962         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 963         g_return_if_fail(partinfo != NULL);
 964
 965         part_name = get_part_name(partinfo);
 966         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
 967 }
 968
 969 static void mimeview_update_names(MimeView *mimeview)
 970 {
 971         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 972
 973         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
 974 }
 975
 976 static void mimeview_update_signature_info(MimeView *mimeview)
 977 {
 978         MimeInfo *partinfo;
 979
 980         if (!mimeview) return;
 981         if (!mimeview->opened) return;
 982
 983         partinfo = gtk_ctree_node_get_row_data
 984                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 985         if (!partinfo) return;
 986
 987         if (g_strcasecmp(partinfo->content_type,
 988                          "application/pgp-signature") == 0) {
 989                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 990                 textview_show_signature_part(mimeview->textview, partinfo);
 991         }
 992 }
 993
 994 static void mimeview_check_signature(MimeView *mimeview)
 995 {
 996         MimeInfo *mimeinfo;
 997         gchar buf[BUFFSIZE];
 998         FILE *fp;
 999
1000         g_return_if_fail (mimeview_is_signed(mimeview));
1001
1002         mimeinfo = gtk_ctree_node_get_row_data
1003                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1004         g_return_if_fail(mimeinfo != NULL);
1005         g_return_if_fail(mimeview->file != NULL);
1006
1007         while (mimeinfo->parent)
1008                 mimeinfo = mimeinfo->parent;
1009
1010         if ((fp = fopen(mimeview->file, "rb")) == NULL) {
1011                 FILE_OP_ERROR(mimeview->file, "fopen");
1012                 return;
1013         }
1014
1015         /* skip headers */
1016         if (mimeinfo->mime_type == MIME_MULTIPART) {
1017                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
1018                 FILE_OP_ERROR(mimeview->file, "fseek");
1019                 while (fgets(buf, sizeof(buf), fp) != NULL)
1020                         if (buf[0] == '\r' || buf[0] == '\n') break;
1021         }
1022
1023         procmime_scan_multipart_message(mimeinfo, fp);
1024         rfc2015_check_signature(mimeinfo, fp);
1025         fclose(fp);
1026
1027         mimeview_update_names(mimeview);
1028         mimeview_update_signature_info(mimeview);
1029 }
1030 #endif /* USE_GPGME */