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_save_all           (MimeView       *mimeview);
 106 static void mimeview_launch             (MimeView       *mimeview);
 107 static void mimeview_open_with          (MimeView       *mimeview);
 108 static void mimeview_view_file          (const gchar    *filename,
 109                                          MimeInfo       *partinfo,
 110                                          const gchar    *cmdline);
 111 #if USE_GPGME
 112 static void mimeview_check_signature    (MimeView       *mimeview);
 113 #endif
 114
 115 static GtkItemFactoryEntry mimeview_popup_entries[] =
 116 {
 117         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 118         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 119         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 120         {N_("/_Display image"),   NULL, mimeview_show_image,      0, NULL},
 121         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL},
 122         {N_("/Save _all..."),     NULL, mimeview_save_all,        0, NULL}
 123 #if USE_GPGME
 124         ,
 125         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 126 #endif
 127 };
 128
 129 static GtkTargetEntry mimeview_mime_types[] =
 130 {
 131         {"text/uri-list", 0, 0}
 132 };
 133
 134 MimeView *mimeview_create(void)
 135 {
 136         MimeView *mimeview;
 137
 138         GtkWidget *notebook;
 139         GtkWidget *vbox;
 140         GtkWidget *paned;
 141         GtkWidget *scrolledwin;
 142         GtkWidget *ctree;
 143         GtkWidget *mime_vbox;
 144         GtkWidget *popupmenu;
 145         GtkItemFactory *popupfactory;
 146         gchar *titles[N_MIMEVIEW_COLS];
 147         gint n_entries;
 148         gint i;
 149
 150         debug_print("Creating MIME view...\n");
 151         mimeview = g_new0(MimeView, 1);
 152
 153         titles[COL_MIMETYPE] = _("MIME Type");
 154         titles[COL_SIZE]     = _("Size");
 155         titles[COL_NAME]     = _("Name");
 156
 157         notebook = gtk_notebook_new();
 158         gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook), TRUE);
 159
 160         vbox = gtk_vbox_new(FALSE, 0);
 161         gtk_container_add(GTK_CONTAINER(notebook), vbox);
 162         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), vbox,
 163                                         _("Text"));
 164
 165         scrolledwin = gtk_scrolled_window_new(NULL, NULL);
 166         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
 167                                        GTK_POLICY_AUTOMATIC,
 168                                        GTK_POLICY_ALWAYS);
 169         gtk_widget_set_usize(scrolledwin, -1, 80);
 170
 171         ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
 172         gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);
 173         gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
 174         gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
 175                                            GTK_JUSTIFY_RIGHT);
 176         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
 177         gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
 178         for (i = 0; i < N_MIMEVIEW_COLS; i++)
 179                 GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
 180                                        GTK_CAN_FOCUS);
 181         gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
 182
 183         gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
 184                            GTK_SIGNAL_FUNC(mimeview_selected), mimeview);
 185         gtk_signal_connect(GTK_OBJECT(ctree), "button_press_event",
 186                            GTK_SIGNAL_FUNC(mimeview_button_pressed), mimeview);
 187         gtk_signal_connect(GTK_OBJECT(ctree), "key_press_event",
 188                            GTK_SIGNAL_FUNC(mimeview_key_pressed), mimeview);
 189         gtk_signal_connect(GTK_OBJECT (ctree),"start_drag",
 190                            GTK_SIGNAL_FUNC (mimeview_start_drag), mimeview);
 191         gtk_signal_connect(GTK_OBJECT(ctree), "drag_data_get",
 192                            GTK_SIGNAL_FUNC(mimeview_drag_data_get), mimeview);
 193
 194         mime_vbox = gtk_vbox_new(FALSE, 0);
 195
 196         paned = gtk_vpaned_new();
 197         gtk_paned_add1(GTK_PANED(paned), scrolledwin);
 198         gtk_paned_add2(GTK_PANED(paned), mime_vbox);
 199         gtk_container_add(GTK_CONTAINER(notebook), paned);
 200         gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), paned,
 201                                         _("Attachments"));
 202
 203         gtk_widget_show_all(notebook);
 204
 205         gtk_notebook_set_page(GTK_NOTEBOOK(notebook), 0);
 206
 207         n_entries = sizeof(mimeview_popup_entries) /
 208                 sizeof(mimeview_popup_entries[0]);
 209         popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
 210                                       "<MimeView>", &popupfactory, mimeview);
 211
 212         mimeview->notebook     = notebook;
 213         mimeview->vbox         = vbox;
 214         mimeview->paned        = paned;
 215         mimeview->scrolledwin  = scrolledwin;
 216         mimeview->ctree        = ctree;
 217         mimeview->mime_vbox    = mime_vbox;
 218         mimeview->popupmenu    = popupmenu;
 219         mimeview->popupfactory = popupfactory;
 220         mimeview->type         = -1;
 221
 222         return mimeview;
 223 }
 224
 225 void mimeview_init(MimeView *mimeview)
 226 {
 227 }
 228
 229 /*
 230  * Check whether the message is OpenPGP signed
 231  */
 232 #if USE_GPGME
 233 static gboolean mimeview_is_signed(MimeView *mimeview)
 234 {
 235         MimeInfo *partinfo = NULL;
 236
 237         debug_print("mimeview_is signed of %p\n", mimeview);
 238
 239         if (!mimeview) return FALSE;
 240         if (!mimeview->opened) return FALSE;
 241
 242         debug_print("mimeview_is_signed: open\n" );
 243
 244         if (!mimeview->file) return FALSE;
 245
 246         debug_print("mimeview_is_signed: file\n" );
 247
 248         partinfo = gtk_ctree_node_get_row_data
 249                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 250         g_return_val_if_fail(partinfo != NULL, FALSE);
 251
 252         /* walk the tree and see whether there is a signature somewhere */
 253         do {
 254                 if (rfc2015_has_signature(partinfo))
 255                         return TRUE;
 256         } while ((partinfo = partinfo->parent) != NULL);
 257
 258         debug_print("mimeview_is_signed: FALSE\n" );
 259
 260         return FALSE;
 261 }
 262
 263 static void set_unchecked_signature(MimeInfo *mimeinfo)
 264 {
 265         MimeInfo *sig_partinfo;
 266
 267         sig_partinfo = rfc2015_find_signature(mimeinfo);
 268         if (sig_partinfo == NULL) return;
 269
 270         g_free(sig_partinfo->sigstatus);
 271         sig_partinfo->sigstatus =
 272                 g_strdup(_("Select \"Check signature\" to check"));
 273
 274         g_free(sig_partinfo->sigstatus_full);
 275         sig_partinfo->sigstatus_full = NULL;
 276 }
 277 #endif /* USE_GPGME */
 278
 279 void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
 280                            const gchar *file)
 281 {
 282         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 283         GtkCTreeNode *node;
 284         gchar buf[BUFFSIZE];
 285         FILE *fp;
 286
 287         mimeview_clear(mimeview);
 288         textview_clear(mimeview->messageview->textview);
 289
 290         g_return_if_fail(file != NULL);
 291         g_return_if_fail(mimeinfo != NULL);
 292
 293         mimeview->mimeinfo = mimeinfo;
 294
 295         if ((fp = fopen(file, "rb")) == NULL) {
 296                 FILE_OP_ERROR(file, "fopen");
 297                 return;
 298         }
 299         mimeview->file = g_strdup(file);
 300
 301         /* skip MIME part headers */
 302         if (mimeinfo->mime_type == MIME_MULTIPART) {
 303                 if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 304                         perror("fseek");
 305                 while (fgets(buf, sizeof(buf), fp) != NULL)
 306                         if (buf[0] == '\r' || buf[0] == '\n') break;
 307         }
 308
 309         procmime_scan_multipart_message(mimeinfo, fp);
 310 #if USE_GPGME
 311         if (prefs_common.auto_check_signatures)
 312                 rfc2015_check_signature(mimeinfo, fp);
 313         else
 314                 set_unchecked_signature(mimeinfo);
 315 #endif
 316
 317         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 318                                          mimeview);
 319
 320         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 321
 322         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 323                                            mimeview_selected, mimeview);
 324
 325         /* search first text part */
 326         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 327              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 328                 MimeInfo *partinfo;
 329
 330                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 331                 if (partinfo &&
 332                     (partinfo->mime_type == MIME_TEXT ||
 333                      partinfo->mime_type == MIME_TEXT_HTML))
 334                         break;
 335         }
 336         fclose(fp);
 337         textview_show_message(mimeview->messageview->textview, mimeinfo, file);
 338
 339         if (!node)
 340                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 341
 342         if (node) {
 343                 gtk_ctree_select(ctree, node);
 344                 gtkut_ctree_set_focus_row(ctree, node);
 345                 gtk_widget_grab_focus(mimeview->ctree);
 346         }
 347 }
 348
 349 void mimeview_destroy(MimeView *mimeview)
 350 {
 351         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 352         g_free(mimeview->file);
 353         g_free(mimeview);
 354 }
 355
 356 static void mimeview_set_multipart_tree(MimeView *mimeview,
 357                                         MimeInfo *mimeinfo,
 358                                         GtkCTreeNode *parent)
 359 {
 360         GtkCTreeNode *current = parent;
 361
 362         g_return_if_fail(mimeinfo != NULL);
 363
 364         if (!mimeinfo->sub && mimeinfo->parent)
 365                 current = mimeview_append_part(mimeview, mimeinfo, parent);
 366         if (mimeinfo->sub && !mimeinfo->sub->children &&
 367             mimeinfo->sub->mime_type != MIME_TEXT &&
 368             mimeinfo->sub->mime_type != MIME_TEXT_HTML) {
 369                 mimeview_append_part(mimeview, mimeinfo->sub, parent);
 370                 return;
 371         }
 372
 373         if (mimeinfo->sub)
 374                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, current);
 375
 376         if (mimeinfo->children)
 377                 mimeview_set_multipart_tree(mimeview, mimeinfo->children, current);
 378
 379         if (mimeinfo->next)
 380                 mimeview_set_multipart_tree(mimeview, mimeinfo->next, parent);
 381 }
 382
 383 static gchar *get_part_name(MimeInfo *partinfo)
 384 {
 385 #if USE_GPGME
 386         if (partinfo->sigstatus)
 387                 return partinfo->sigstatus;
 388         else
 389 #endif
 390         if (partinfo->name)
 391                 return partinfo->name;
 392         else if (partinfo->filename)
 393                 return partinfo->filename;
 394         else
 395                 return "";
 396 }
 397
 398 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 399                                           MimeInfo *partinfo,
 400                                           GtkCTreeNode *parent)
 401 {
 402         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 403         GtkCTreeNode *node;
 404         gchar *str[N_MIMEVIEW_COLS];
 405
 406         str[COL_MIMETYPE] =
 407                 partinfo->content_type ? partinfo->content_type : "";
 408         str[COL_SIZE] = to_human_readable(partinfo->size);
 409         str[COL_NAME] = get_part_name(partinfo);
 410
 411         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 412                                      NULL, NULL, NULL, NULL,
 413                                      FALSE, TRUE);
 414         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 415
 416         return node;
 417 }
 418
 419 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 420 {
 421         FILE *fp;
 422         const gchar *fname;
 423 #if USE_GPGME
 424         MimeInfo *pi;
 425 #endif
 426
 427         if (!partinfo) return;
 428
 429 #if USE_GPGME
 430         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 431                 ;
 432         fname = pi ? pi->plaintextfile : mimeview->file;
 433 #else
 434         fname = mimeview->file;
 435 #endif /* USE_GPGME */
 436         if (!fname) return;
 437
 438         if ((fp = fopen(fname, "rb")) == NULL) {
 439                 FILE_OP_ERROR(fname, "fopen");
 440                 return;
 441         }
 442
 443         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 444                 FILE_OP_ERROR(mimeview->file, "fseek");
 445                 fclose(fp);
 446                 return;
 447         }
 448
 449         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 450         textview_show_part(mimeview->textview, partinfo, fp);
 451
 452         fclose(fp);
 453 }
 454
 455 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 456 {
 457         gchar *filename;
 458
 459         if (!partinfo) return;
 460
 461         filename = procmime_get_tmp_file_name(partinfo);
 462
 463         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 464                 alertpanel_error
 465                         (_("Can't get the part of multipart message."));
 466         else {
 467                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 468                 /* Workaround for the GTK+ bug with handling scroll adjustments
 469                  * in GtkViewport */
 470                 imageview_clear(mimeview->imageview);
 471                 imageview_show_image(mimeview->imageview, partinfo, filename);
 472                 unlink(filename);
 473         }
 474
 475         g_free(filename);
 476 }
 477
 478 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 479 {
 480         TextView  *textview  = mimeview->textview;
 481         ImageView *imageview = mimeview->imageview;
 482         GList *children;
 483
 484         if (mimeview->type == type) return;
 485
 486         children = gtk_container_children(GTK_CONTAINER(mimeview->mime_vbox));
 487         if (children) {
 488                 gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
 489                                        GTK_WIDGET(children->data));
 490                 g_list_free(children);
 491         }
 492
 493         switch (type) {
 494         case MIMEVIEW_IMAGE:
 495                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 496                                   GTK_WIDGET_PTR(imageview));
 497                 break;
 498         case MIMEVIEW_TEXT:
 499                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 500                                   GTK_WIDGET_PTR(textview));
 501                 break;
 502         default:
 503                 return;
 504         }
 505
 506         mimeview->type = type;
 507 }
 508
 509 static void mimeview_clear(MimeView *mimeview)
 510 {
 511         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 512
 513         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 514         mimeview->mimeinfo = NULL;
 515
 516         gtk_clist_clear(clist);
 517         textview_clear(mimeview->textview);
 518         imageview_clear(mimeview->imageview);
 519
 520         mimeview->opened = NULL;
 521
 522         g_free(mimeview->file);
 523         mimeview->file = NULL;
 524
 525         /* gtk_notebook_set_page(GTK_NOTEBOOK(mimeview->notebook), 0); */
 526 }
 527
 528 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 529                               MimeView *mimeview)
 530 {
 531         MimeInfo *partinfo;
 532
 533         if (mimeview->opened == node) return;
 534         mimeview->opened = node;
 535         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 536
 537         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 538         if (!partinfo) return;
 539
 540         /* ungrab the mouse event */
 541         if (GTK_WIDGET_HAS_GRAB(ctree)) {
 542                 gtk_grab_remove(GTK_WIDGET(ctree));
 543                 if (gdk_pointer_is_grabbed())
 544                         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 545         }
 546
 547         mimeview->textview->default_text = FALSE;
 548
 549         switch (partinfo->mime_type) {
 550         case MIME_TEXT:
 551         case MIME_TEXT_HTML:
 552         case MIME_TEXT_ENRICHED:
 553         case MIME_MESSAGE_RFC822:
 554         case MIME_MULTIPART:
 555                 mimeview_show_message_part(mimeview, partinfo);
 556
 557                 break;
 558 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 559         case MIME_IMAGE:
 560                 mimeview->textview->default_text = TRUE;
 561                 if (prefs_common.display_img)
 562                         mimeview_show_image_part(mimeview, partinfo);
 563                 else {
 564                         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 565                         textview_show_mime_part(mimeview->textview, partinfo);
 566                 }
 567                 break;
 568 #endif
 569         default:
 570                 mimeview->textview->default_text = TRUE;
 571                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 572 #if USE_GPGME
 573                 if (g_strcasecmp(partinfo->content_type,
 574                                  "application/pgp-signature") == 0)
 575                         textview_show_signature_part(mimeview->textview,
 576                                                      partinfo);
 577                 else
 578 #endif
 579                         textview_show_mime_part(mimeview->textview, partinfo);
 580                 break;
 581         }
 582 }
 583
 584 static void mimeview_start_drag(GtkWidget *widget, gint button,
 585                                 GdkEvent *event, MimeView *mimeview)
 586 {
 587         GtkTargetList *list;
 588         GdkDragContext *context;
 589         MimeInfo *partinfo;
 590         GtkCTree *ctree;
 591
 592         g_return_if_fail(mimeview != NULL);
 593         ctree = GTK_CTREE(mimeview->ctree);
 594         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 595         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 596
 597         list = gtk_target_list_new(mimeview_mime_types, 1);
 598         context = gtk_drag_begin(widget, list,
 599                                  GDK_ACTION_COPY, button, event);
 600         gtk_drag_set_icon_default(context);
 601 }
 602
 603 static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 604                                     MimeView *mimeview)
 605 {
 606         GtkCList *clist = GTK_CLIST(widget);
 607         MimeInfo *partinfo;
 608         gint row, column;
 609
 610         if (!event) return FALSE;
 611
 612         if (event->button == 2 || event->button == 3) {
 613                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 614                                                   &row, &column))
 615                         return FALSE;
 616                 gtk_clist_unselect_all(clist);
 617                 gtk_clist_select_row(clist, row, column);
 618                 gtkut_clist_set_focus_row(clist, row);
 619         }
 620
 621         if (event->button == 2 ||
 622             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 623                 /* call external program for image, audio or html */
 624                 mimeview_launch(mimeview);
 625         } else if (event->button == 3) {
 626                 partinfo = gtk_ctree_node_get_row_data
 627                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 628                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 629                                  partinfo->mime_type == MIME_TEXT_HTML ||
 630                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 631                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 632                                  partinfo->mime_type == MIME_IMAGE ||
 633                                  partinfo->mime_type == MIME_MULTIPART))
 634                         menu_set_sensitive(mimeview->popupfactory,
 635                                            "/Display as text", FALSE);
 636                 else
 637                         menu_set_sensitive(mimeview->popupfactory,
 638                                            "/Display as text", TRUE);
 639                 if (partinfo &&
 640                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 641                         menu_set_sensitive(mimeview->popupfactory,
 642                                            "/Open", FALSE);
 643                 else
 644                         menu_set_sensitive(mimeview->popupfactory,
 645                                            "/Open", TRUE);
 646
 647 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 648                 if (partinfo && (partinfo->mime_type == MIME_IMAGE))
 649                         menu_set_sensitive(mimeview->popupfactory,
 650                                            "/Display image", TRUE);
 651 #endif
 652 #if USE_GPGME
 653                 menu_set_sensitive(mimeview->popupfactory,
 654                                    "/Check signature",
 655                                    mimeview_is_signed(mimeview));
 656 #endif
 657
 658                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 659                                NULL, NULL, NULL, NULL,
 660                                event->button, event->time);
 661         }
 662
 663         return TRUE;
 664 }
 665
 666 void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
 667 {
 668         mimeview_key_pressed(mimeview->ctree, event, mimeview);
 669 }
 670
 671 #define BREAK_ON_MODIFIER_KEY() \
 672         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 673
 674 #define KEY_PRESS_EVENT_STOP() \
 675         if (gtk_signal_n_emissions_by_name \
 676                 (GTK_OBJECT(ctree), "key_press_event") > 0) { \
 677                 gtk_signal_emit_stop_by_name(GTK_OBJECT(ctree), \
 678                                              "key_press_event"); \
 679         }
 680
 681 static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 682                                  MimeView *mimeview)
 683 {
 684         SummaryView *summaryview;
 685         GtkCTree *ctree = GTK_CTREE(widget);
 686         GtkCTreeNode *node;
 687
 688         if (!event) return FALSE;
 689         if (!mimeview->opened) return FALSE;
 690
 691         switch (event->keyval) {
 692         case GDK_space:
 693                 if (textview_scroll_page(mimeview->textview, FALSE))
 694                         return TRUE;
 695
 696                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 697                 if (node) {
 698                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 699                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 700                         return TRUE;
 701                 }
 702                 break;
 703         case GDK_BackSpace:
 704                 textview_scroll_page(mimeview->textview, TRUE);
 705                 return TRUE;
 706         case GDK_Return:
 707                 textview_scroll_one_line(mimeview->textview,
 708                                          (event->state & GDK_MOD1_MASK) != 0);
 709                 return TRUE;
 710         case GDK_n:
 711         case GDK_N:
 712                 BREAK_ON_MODIFIER_KEY();
 713                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 714                 KEY_PRESS_EVENT_STOP();
 715
 716                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 717                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 718                 return TRUE;
 719         case GDK_p:
 720         case GDK_P:
 721                 BREAK_ON_MODIFIER_KEY();
 722                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 723                 KEY_PRESS_EVENT_STOP();
 724
 725                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 726                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 727                 return TRUE;
 728         case GDK_y:
 729                 BREAK_ON_MODIFIER_KEY();
 730                 KEY_PRESS_EVENT_STOP();
 731                 mimeview_save_as(mimeview);
 732                 return TRUE;
 733         case GDK_t:
 734                 BREAK_ON_MODIFIER_KEY();
 735                 KEY_PRESS_EVENT_STOP();
 736                 mimeview_display_as_text(mimeview);
 737                 return TRUE;
 738         case GDK_i:
 739                 BREAK_ON_MODIFIER_KEY();
 740                 KEY_PRESS_EVENT_STOP();
 741                 mimeview_show_image(mimeview);
 742                 return TRUE;
 743         case GDK_l:
 744                 BREAK_ON_MODIFIER_KEY();
 745                 KEY_PRESS_EVENT_STOP();
 746                 mimeview_launch(mimeview);
 747                 return TRUE;
 748         default:
 749                 break;
 750         }
 751
 752         if (!mimeview->messageview->mainwin) return FALSE;
 753         summaryview = mimeview->messageview->mainwin->summaryview;
 754         summary_pass_key_press_event(summaryview, event);
 755         return TRUE;
 756 }
 757
 758 static void mimeview_drag_data_get(GtkWidget        *widget,
 759                                    GdkDragContext   *drag_context,
 760                                    GtkSelectionData *selection_data,
 761                                    guint             info,
 762                                    guint             time,
 763                                    MimeView         *mimeview)
 764 {
 765         gchar *filename, *uriname;
 766         MimeInfo *partinfo;
 767
 768         if (!mimeview->opened) return;
 769         if (!mimeview->file) return;
 770
 771         partinfo = gtk_ctree_node_get_row_data
 772                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 773         if (!partinfo) return;
 774         if (!partinfo->filename && !partinfo->name) return;
 775
 776         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 777         filename = g_basename(filename);
 778         if (*filename == '\0') return;
 779
 780         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 781                                filename, NULL);
 782
 783         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 784                 alertpanel_error
 785                         (_("Can't save the part of multipart message."));
 786
 787         uriname = g_strconcat("file:/", filename, NULL);
 788         gtk_selection_data_set(selection_data, selection_data->target, 8,
 789                                uriname, strlen(uriname));
 790
 791         g_free(uriname);
 792         g_free(filename);
 793 }
 794
 795 static void mimeview_save_all(MimeView *mimeview)
 796 {
 797         gchar *dirname;
 798         gchar *defname = NULL;
 799         MimeInfo *partinfo;
 800         MimeInfo *attachment;
 801         gchar buf[1024];
 802
 803         if (!mimeview->opened) return;
 804         if (!mimeview->file) return;
 805
 806         partinfo = gtk_ctree_node_get_row_data
 807                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 808         g_return_if_fail(partinfo != NULL);
 809
 810         dirname = filesel_select_file(_("Save as"), defname);
 811         if (!dirname) return;
 812
 813         /* return to first children */
 814         attachment = partinfo->parent->children->next;
 815         /* for each attachment, extract it in the selected dir. */
 816         while(attachment != NULL)
 817         {
 818                 static guint subst_cnt = 1;
 819                 gchar *attachdir;
 820                 gchar *attachname = (attachment->filename)
 821                         ? g_strdup(attachment->filename)
 822                         : g_strdup_printf("noname.%d",subst_cnt++);
 823
 824                 subst_chars(attachname, "/\\", G_DIR_SEPARATOR);
 825                 subst_chars(attachname, ":?*&|<>\t\r\n", '_');
 826                 g_snprintf(buf, sizeof(buf), "%s%s",
 827                            dirname,
 828                            (attachname[0] == G_DIR_SEPARATOR)
 829                            ? &attachname[1]
 830                            : attachname);
 831                 attachdir = g_dirname(buf);
 832                 make_dir_hier(attachdir);
 833                 g_free(attachdir);
 834                 g_free(attachname);
 835
 836                 if (is_file_exist(buf)) {
 837                         AlertValue aval;
 838
 839                         aval = alertpanel(_("Overwrite"),
 840                                           _("Overwrite existing file?"),
 841                                           _("OK"), _("Cancel"), NULL);
 842                         if (G_ALERTDEFAULT != aval) return;
 843                 }
 844                 if (procmime_get_part(buf, mimeview->file, attachment) < 0)
 845                         alertpanel_error(_("Can't save the part of multipart message."));
 846                 attachment = attachment->next;
 847         }
 848 }
 849
 850 static void mimeview_display_as_text(MimeView *mimeview)
 851 {
 852         MimeInfo *partinfo;
 853
 854         if (!mimeview->opened) return;
 855
 856         partinfo = gtk_ctree_node_get_row_data
 857                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 858         mimeview_show_message_part(mimeview, partinfo);
 859 }
 860
 861 static void mimeview_show_image(MimeView *mimeview)
 862 {
 863         MimeInfo *partinfo;
 864
 865         if (!mimeview->opened) return;
 866
 867         partinfo = gtk_ctree_node_get_row_data
 868                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 869         mimeview_show_image_part(mimeview, partinfo);
 870 }
 871
 872 static void mimeview_save_as(MimeView *mimeview)
 873 {
 874         gchar *filename;
 875         gchar *defname = NULL;
 876         MimeInfo *partinfo;
 877
 878         if (!mimeview->opened) return;
 879         if (!mimeview->file) return;
 880
 881         partinfo = gtk_ctree_node_get_row_data
 882                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 883         g_return_if_fail(partinfo != NULL);
 884
 885         if (partinfo->filename)
 886                 defname = partinfo->filename;
 887         else if (partinfo->name) {
 888                 Xstrdup_a(defname, partinfo->name, return);
 889                 subst_for_filename(defname);
 890         }
 891
 892         filename = filesel_select_file(_("Save as"), defname);
 893         if (!filename) return;
 894         if (is_file_exist(filename)) {
 895                 AlertValue aval;
 896
 897                 aval = alertpanel(_("Overwrite"),
 898                                   _("Overwrite existing file?"),
 899                                   _("OK"), _("Cancel"), NULL);
 900                 if (G_ALERTDEFAULT != aval) return;
 901         }
 902
 903         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 904                 alertpanel_error
 905                         (_("Can't save the part of multipart message."));
 906 }
 907
 908 static void mimeview_launch(MimeView *mimeview)
 909 {
 910         MimeInfo *partinfo;
 911         gchar *filename;
 912
 913         if (!mimeview->opened) return;
 914         if (!mimeview->file) return;
 915
 916         partinfo = gtk_ctree_node_get_row_data
 917                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 918         g_return_if_fail(partinfo != NULL);
 919
 920         filename = procmime_get_tmp_file_name(partinfo);
 921
 922         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 923                 alertpanel_error
 924                         (_("Can't save the part of multipart message."));
 925         else
 926                 mimeview_view_file(filename, partinfo, NULL);
 927
 928         g_free(filename);
 929 }
 930
 931 static void mimeview_open_with(MimeView *mimeview)
 932 {
 933         MimeInfo *partinfo;
 934         gchar *filename;
 935         gchar *cmd;
 936
 937         if (!mimeview->opened) return;
 938         if (!mimeview->file) return;
 939
 940         partinfo = gtk_ctree_node_get_row_data
 941                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 942         g_return_if_fail(partinfo != NULL);
 943
 944         filename = procmime_get_tmp_file_name(partinfo);
 945
 946         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
 947                 alertpanel_error
 948                         (_("Can't save the part of multipart message."));
 949                 g_free(filename);
 950                 return;
 951         }
 952
 953         if (!prefs_common.mime_open_cmd_history)
 954                 prefs_common.mime_open_cmd_history =
 955                         add_history(NULL, prefs_common.mime_open_cmd);
 956
 957         cmd = input_dialog_combo
 958                 (_("Open with"),
 959                  _("Enter the command line to open file:\n"
 960                    "(`%s' will be replaced with file name)"),
 961                  prefs_common.mime_open_cmd,
 962                  prefs_common.mime_open_cmd_history,
 963                  TRUE);
 964         if (cmd) {
 965                 mimeview_view_file(filename, partinfo, cmd);
 966                 g_free(prefs_common.mime_open_cmd);
 967                 prefs_common.mime_open_cmd = cmd;
 968                 prefs_common.mime_open_cmd_history =
 969                         add_history(prefs_common.mime_open_cmd_history, cmd);
 970         }
 971
 972         g_free(filename);
 973 }
 974
 975 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
 976                                const gchar *cmdline)
 977 {
 978         static gchar *default_image_cmdline = "display '%s'";
 979         static gchar *default_audio_cmdline = "play '%s'";
 980         static gchar *default_html_cmdline =
 981                 "netscape -remote 'openURL(%s,raise)'";
 982         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
 983         gchar buf[1024];
 984         gchar m_buf[1024];
 985         const gchar *cmd;
 986         const gchar *def_cmd;
 987         const gchar *p;
 988
 989         if (cmdline) {
 990                 cmd = cmdline;
 991                 def_cmd = NULL;
 992         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
 993                 return;
 994         } else if (MIME_IMAGE == partinfo->mime_type) {
 995                 cmd = prefs_common.mime_image_viewer;
 996                 def_cmd = default_image_cmdline;
 997         } else if (MIME_AUDIO == partinfo->mime_type) {
 998                 cmd = prefs_common.mime_audio_player;
 999                 def_cmd = default_audio_cmdline;
1000         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
1001                 cmd = prefs_common.uri_cmd;
1002                 def_cmd = default_html_cmdline;
1003         } else {
1004                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
1005                            partinfo->content_type, "%s");
1006                 cmd = m_buf;
1007                 def_cmd = NULL;
1008         }
1009
1010         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
1011             !strchr(p + 2, '%'))
1012                 g_snprintf(buf, sizeof(buf), cmd, filename);
1013         else {
1014                 if (cmd)
1015                         g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
1016                 if (def_cmd)
1017                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
1018                 else
1019                         return;
1020         }
1021
1022         execute_command_line(buf, TRUE);
1023 }
1024
1025 #if USE_GPGME
1026 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
1027                              gpointer data)
1028 {
1029         MimeInfo *partinfo;
1030         gchar *part_name;
1031
1032         partinfo = gtk_ctree_node_get_row_data(ctree, node);
1033         g_return_if_fail(partinfo != NULL);
1034
1035         part_name = get_part_name(partinfo);
1036         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
1037 }
1038
1039 static void mimeview_update_names(MimeView *mimeview)
1040 {
1041         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
1042
1043         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
1044 }
1045
1046 static void mimeview_update_signature_info(MimeView *mimeview)
1047 {
1048         MimeInfo *partinfo;
1049
1050         if (!mimeview) return;
1051         if (!mimeview->opened) return;
1052
1053         partinfo = gtk_ctree_node_get_row_data
1054                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1055         if (!partinfo) return;
1056
1057         if (g_strcasecmp(partinfo->content_type,
1058                          "application/pgp-signature") == 0) {
1059                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
1060                 textview_show_signature_part(mimeview->textview, partinfo);
1061         }
1062 }
1063
1064 static void mimeview_check_signature(MimeView *mimeview)
1065 {
1066         MimeInfo *mimeinfo;
1067         FILE *fp;
1068
1069         g_return_if_fail (mimeview_is_signed(mimeview));
1070
1071         mimeinfo = gtk_ctree_node_get_row_data
1072                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1073         g_return_if_fail(mimeinfo != NULL);
1074         g_return_if_fail(mimeview->file != NULL);
1075
1076         while (mimeinfo->parent)
1077                 mimeinfo = mimeinfo->parent;
1078
1079         if ((fp = fopen(mimeview->file, "rb")) == NULL) {
1080                 FILE_OP_ERROR(mimeview->file, "fopen");
1081                 return;
1082         }
1083
1084         rfc2015_check_signature(mimeinfo, fp);
1085         fclose(fp);
1086
1087         mimeview_update_names(mimeview);
1088         mimeview_update_signature_info(mimeview);
1089
1090         textview_show_message(mimeview->messageview->textview, mimeinfo,
1091                               mimeview->file);
1092 }
1093 #endif /* USE_GPGME */