src/mimeview.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 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 #include <fnmatch.h>
  41
  42 #include "intl.h"
  43 #include "main.h"
  44 #include "mimeview.h"
  45 #include "textview.h"
  46 #include "procmime.h"
  47 #include "summaryview.h"
  48 #include "menu.h"
  49 #include "filesel.h"
  50 #include "alertpanel.h"
  51 #include "inputdialog.h"
  52 #include "utils.h"
  53 #include "gtkutils.h"
  54 #include "prefs_common.h"
  55 #include "rfc2015.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_change_view_type           (MimeView       *mimeview,
  75                                                  MimeViewType    type);
  76 static void mimeview_clear                      (MimeView       *mimeview);
  77
  78 static void mimeview_selected           (GtkCTree       *ctree,
  79                                          GtkCTreeNode   *node,
  80                                          gint            column,
  81                                          MimeView       *mimeview);
  82 static void mimeview_start_drag         (GtkWidget      *widget,
  83                                          gint            button,
  84                                          GdkEvent       *event,
  85                                          MimeView       *mimeview);
  86 static gint mimeview_button_pressed     (GtkWidget      *widget,
  87                                          GdkEventButton *event,
  88                                          MimeView       *mimeview);
  89 static gint mimeview_key_pressed        (GtkWidget      *widget,
  90                                          GdkEventKey    *event,
  91                                          MimeView       *mimeview);
  92
  93 static void mimeview_drag_data_get      (GtkWidget        *widget,
  94                                          GdkDragContext   *drag_context,
  95                                          GtkSelectionData *selection_data,
  96                                          guint             info,
  97                                          guint             time,
  98                                          MimeView         *mimeview);
  99
 100 static void mimeview_display_as_text    (MimeView       *mimeview);
 101 static void mimeview_save_as            (MimeView       *mimeview);
 102 static void mimeview_save_all           (MimeView       *mimeview);
 103 static void mimeview_launch             (MimeView       *mimeview);
 104 static void mimeview_open_with          (MimeView       *mimeview);
 105 static void mimeview_view_file          (const gchar    *filename,
 106                                          MimeInfo       *partinfo,
 107                                          const gchar    *cmdline);
 108
 109 static GtkItemFactoryEntry mimeview_popup_entries[] =
 110 {
 111         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 112         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 113         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 114         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL},
 115         {N_("/Save _all..."),     NULL, mimeview_save_all,        0, NULL}
 116 #if USE_GPGME
 117         ,
 118         {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
 119 #endif
 120 };
 121
 122 static GtkTargetEntry mimeview_mime_types[] =
 123 {
 124         {"text/uri-list", 0, 0}
 125 };
 126
 127 GSList *mimeviewer_factories;
 128 GSList *mimeviews;
 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         mimeviews = g_slist_prepend(mimeviews, mimeview);
 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             && (gpg_started))
 311                 rfc2015_check_signature(mimeinfo, fp);
 312         else
 313                 set_unchecked_signature(mimeinfo);
 314 #endif
 315
 316         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 317                                          mimeview);
 318
 319         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 320
 321         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 322                                            mimeview_selected, mimeview);
 323
 324         /* search first text part */
 325         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 326              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 327                 MimeInfo *partinfo;
 328
 329                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 330                 if (partinfo &&
 331                     (partinfo->mime_type == MIME_TEXT ||
 332                      partinfo->mime_type == MIME_TEXT_HTML))
 333                         break;
 334         }
 335         fclose(fp);
 336         textview_show_message(mimeview->messageview->textview, mimeinfo, file);
 337
 338         if (!node)
 339                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 340
 341         if (node) {
 342                 gtk_ctree_select(ctree, node);
 343                 gtkut_ctree_set_focus_row(ctree, node);
 344                 gtk_widget_grab_focus(mimeview->ctree);
 345         }
 346 }
 347
 348 void mimeview_destroy(MimeView *mimeview)
 349 {
 350         GSList *cur;
 351
 352         for (cur = mimeview->viewers; cur != NULL; cur = g_slist_next(cur)) {
 353                 MimeViewer *viewer = (MimeViewer *) cur->data;
 354                 viewer->destroy_viewer(viewer);
 355         }
 356         g_slist_free(mimeview->viewers);
 357
 358         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 359         g_free(mimeview->file);
 360         g_free(mimeview);
 361
 362         mimeviews = g_slist_remove(mimeviews, mimeview);
 363 }
 364
 365 MimeInfo *mimeview_get_selected_part(MimeView *mimeview)
 366 {
 367         if (gtk_notebook_get_current_page
 368                 (GTK_NOTEBOOK(mimeview->notebook)) == 0)
 369                 return NULL;
 370
 371         return gtk_ctree_node_get_row_data
 372                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 373 }
 374
 375 static void mimeview_set_multipart_tree(MimeView *mimeview,
 376                                         MimeInfo *mimeinfo,
 377                                         GtkCTreeNode *parent)
 378 {
 379         GtkCTreeNode *current = parent;
 380
 381         g_return_if_fail(mimeinfo != NULL);
 382
 383         if (!mimeinfo->sub && mimeinfo->parent)
 384                 current = mimeview_append_part(mimeview, mimeinfo, parent);
 385         if (mimeinfo->sub && !mimeinfo->sub->children &&
 386             mimeinfo->sub->mime_type != MIME_TEXT &&
 387             mimeinfo->sub->mime_type != MIME_TEXT_HTML) {
 388                 mimeview_append_part(mimeview, mimeinfo->sub, parent);
 389                 return;
 390         }
 391
 392         if (mimeinfo->sub)
 393                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, current);
 394
 395         if (mimeinfo->children)
 396                 mimeview_set_multipart_tree(mimeview, mimeinfo->children, current);
 397
 398         if (mimeinfo->next)
 399                 mimeview_set_multipart_tree(mimeview, mimeinfo->next, parent);
 400 }
 401
 402 static gchar *get_part_name(MimeInfo *partinfo)
 403 {
 404 #if USE_GPGME
 405         if (partinfo->sigstatus)
 406                 return partinfo->sigstatus;
 407         else
 408 #endif
 409         if (partinfo->name)
 410                 return partinfo->name;
 411         else if (partinfo->filename)
 412                 return partinfo->filename;
 413         else if (partinfo->description)
 414                 return partinfo->description;
 415         else
 416                 return "";
 417 }
 418
 419 static gchar *get_part_description(MimeInfo *partinfo)
 420 {
 421         if (partinfo->description)
 422                 return partinfo->description;
 423         else if (partinfo->name)
 424                 return partinfo->name;
 425         else if (partinfo->filename)
 426                 return partinfo->filename;
 427         else
 428                 return "";
 429 }
 430
 431 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 432                                           MimeInfo *partinfo,
 433                                           GtkCTreeNode *parent)
 434 {
 435         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 436         GtkCTreeNode *node;
 437         gchar *str[N_MIMEVIEW_COLS];
 438
 439         str[COL_MIMETYPE] =
 440                 partinfo->content_type ? partinfo->content_type : "";
 441         str[COL_SIZE] = to_human_readable(partinfo->size);
 442         if (prefs_common.attach_desc)
 443                 str[COL_NAME] = get_part_description(partinfo);
 444         else
 445                 str[COL_NAME] = get_part_name(partinfo);
 446
 447         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 448                                      NULL, NULL, NULL, NULL,
 449                                      FALSE, TRUE);
 450         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 451
 452         return node;
 453 }
 454
 455 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 456 {
 457         FILE *fp;
 458         const gchar *fname;
 459 #if USE_GPGME
 460         MimeInfo *pi;
 461 #endif
 462
 463         if (!partinfo) return;
 464
 465 #if USE_GPGME
 466         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 467                 ;
 468         fname = pi ? pi->plaintextfile : mimeview->file;
 469 #else
 470         fname = mimeview->file;
 471 #endif /* USE_GPGME */
 472         if (!fname) return;
 473
 474         if ((fp = fopen(fname, "rb")) == NULL) {
 475                 FILE_OP_ERROR(fname, "fopen");
 476                 return;
 477         }
 478
 479         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 480                 FILE_OP_ERROR(mimeview->file, "fseek");
 481                 fclose(fp);
 482                 return;
 483         }
 484
 485         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 486         textview_show_part(mimeview->textview, partinfo, fp);
 487
 488         fclose(fp);
 489 }
 490
 491 static MimeViewer *get_viewer_for_content_type(MimeView *mimeview, const gchar *content_type)
 492 {
 493         GSList *cur;
 494         MimeViewerFactory *factory = NULL;
 495         MimeViewer *viewer = NULL;
 496
 497         for (cur = mimeviewer_factories; cur != NULL; cur = g_slist_next(cur)) {
 498                 MimeViewerFactory *curfactory = cur->data;
 499
 500                 if(!fnmatch(curfactory->content_type, content_type, 0)) {
 501                         factory = curfactory;
 502                         break;
 503                 }
 504         }
 505         if (factory == NULL)
 506                 return NULL;
 507
 508         for (cur = mimeview->viewers; cur != NULL; cur = g_slist_next(cur)) {
 509                 MimeViewer *curviewer = cur->data;
 510
 511                 if (curviewer->factory == factory)
 512                         return curviewer;
 513         }
 514         viewer = factory->create_viewer();
 515         mimeview->viewers = g_slist_append(mimeview->viewers, viewer);
 516
 517         return viewer;
 518 }
 519
 520 static MimeViewer *get_viewer_for_mimeinfo(MimeView *mimeview, MimeInfo *partinfo)
 521 {
 522         gchar *content_type = NULL;
 523         MimeViewer *viewer = NULL;
 524
 525         if ((partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM) &&
 526             (partinfo->name != NULL)) {
 527                 content_type = procmime_get_mime_type(partinfo->name);
 528         } else {
 529                 content_type = g_strdup(partinfo->content_type);
 530         }
 531
 532         if (content_type != NULL) {
 533                 viewer = get_viewer_for_content_type(mimeview, content_type);
 534                 g_free(content_type);
 535         }
 536
 537         return viewer;
 538 }
 539
 540 static gboolean mimeview_show_part(MimeView *mimeview, MimeInfo *partinfo)
 541 {
 542         MimeViewer *viewer;
 543
 544         viewer = get_viewer_for_mimeinfo(mimeview, partinfo);
 545         if (viewer == NULL) {
 546                 if (mimeview->mimeviewer != NULL)
 547                         mimeview->mimeviewer->clear_viewer(mimeview->mimeviewer);
 548                 mimeview->mimeviewer = NULL;
 549                 return FALSE;
 550         }
 551
 552         if (mimeview->mimeviewer != viewer) {
 553                 if (mimeview->mimeviewer != NULL)
 554                         mimeview->mimeviewer->clear_viewer(mimeview->mimeviewer);
 555                 mimeview->mimeviewer = viewer;
 556                 mimeview_change_view_type(mimeview, MIMEVIEW_VIEWER);
 557         }
 558         viewer->show_mimepart(viewer, mimeview->file, partinfo);
 559
 560         return TRUE;
 561 }
 562
 563 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 564 {
 565         TextView  *textview  = mimeview->textview;
 566         GList *children;
 567
 568         if ((mimeview->type != MIMEVIEW_VIEWER) &&
 569             (mimeview->type == type)) return;
 570
 571         children = gtk_container_children(GTK_CONTAINER(mimeview->mime_vbox));
 572         if (children) {
 573                 gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
 574                                        GTK_WIDGET(children->data));
 575                 g_list_free(children);
 576         }
 577
 578         switch (type) {
 579         case MIMEVIEW_TEXT:
 580                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 581                                   GTK_WIDGET_PTR(textview));
 582                 break;
 583         case MIMEVIEW_VIEWER:
 584                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 585                                   GTK_WIDGET(mimeview->mimeviewer->get_widget(mimeview->mimeviewer)));
 586                 break;
 587         default:
 588                 return;
 589         }
 590
 591         mimeview->type = type;
 592 }
 593
 594 static void mimeview_clear(MimeView *mimeview)
 595 {
 596         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 597
 598         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 599         mimeview->mimeinfo = NULL;
 600
 601         gtk_clist_clear(clist);
 602         textview_clear(mimeview->textview);
 603         if (mimeview->mimeviewer != NULL)
 604                 mimeview->mimeviewer->clear_viewer(mimeview->mimeviewer);
 605
 606         mimeview->opened = NULL;
 607
 608         g_free(mimeview->file);
 609         mimeview->file = NULL;
 610
 611         /* gtk_notebook_set_page(GTK_NOTEBOOK(mimeview->notebook), 0); */
 612 }
 613
 614 static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
 615                               MimeView *mimeview)
 616 {
 617         MimeInfo *partinfo;
 618
 619         if (mimeview->opened == node) return;
 620         mimeview->opened = node;
 621         gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
 622
 623         partinfo = gtk_ctree_node_get_row_data(ctree, node);
 624         if (!partinfo) return;
 625
 626         /* ungrab the mouse event */
 627         if (GTK_WIDGET_HAS_GRAB(ctree)) {
 628                 gtk_grab_remove(GTK_WIDGET(ctree));
 629                 if (gdk_pointer_is_grabbed())
 630                         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 631         }
 632
 633         mimeview->textview->default_text = FALSE;
 634
 635         if (!mimeview_show_part(mimeview, partinfo)) {
 636                 switch (partinfo->mime_type) {
 637                 case MIME_TEXT:
 638                 case MIME_TEXT_HTML:
 639                 case MIME_TEXT_ENRICHED:
 640                 case MIME_MESSAGE_RFC822:
 641                 case MIME_MULTIPART:
 642                         mimeview_show_message_part(mimeview, partinfo);
 643
 644                         break;
 645                 default:
 646                         mimeview->textview->default_text = TRUE;
 647                         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 648 #if USE_GPGME
 649                         if (g_strcasecmp(partinfo->content_type,
 650                                          "application/pgp-signature") == 0)
 651                                 textview_show_signature_part(mimeview->textview,
 652                                                              partinfo);
 653                         else
 654 #endif
 655                                 textview_show_mime_part(mimeview->textview, partinfo);
 656                         break;
 657                 }
 658         }
 659 }
 660
 661 static void mimeview_start_drag(GtkWidget *widget, gint button,
 662                                 GdkEvent *event, MimeView *mimeview)
 663 {
 664         GtkTargetList *list;
 665         GdkDragContext *context;
 666         MimeInfo *partinfo;
 667
 668         g_return_if_fail(mimeview != NULL);
 669
 670         partinfo = mimeview_get_selected_part(mimeview);
 671         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 672
 673         list = gtk_target_list_new(mimeview_mime_types, 1);
 674         context = gtk_drag_begin(widget, list,
 675                                  GDK_ACTION_COPY, button, event);
 676         gtk_drag_set_icon_default(context);
 677 }
 678
 679 static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 680                                     MimeView *mimeview)
 681 {
 682         GtkCList *clist = GTK_CLIST(widget);
 683         MimeInfo *partinfo;
 684         gint row, column;
 685
 686         if (!event) return FALSE;
 687
 688         if (event->button == 2 || event->button == 3) {
 689                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 690                                                   &row, &column))
 691                         return FALSE;
 692                 gtk_clist_unselect_all(clist);
 693                 gtk_clist_select_row(clist, row, column);
 694                 gtkut_clist_set_focus_row(clist, row);
 695         }
 696
 697         if (event->button == 2 ||
 698             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 699                 /* call external program for image, audio or html */
 700                 mimeview_launch(mimeview);
 701         } else if (event->button == 3) {
 702                 partinfo = mimeview_get_selected_part(mimeview);
 703                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 704                                  partinfo->mime_type == MIME_TEXT_HTML ||
 705                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 706                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 707                                  partinfo->mime_type == MIME_IMAGE ||
 708                                  partinfo->mime_type == MIME_MULTIPART))
 709                         menu_set_sensitive(mimeview->popupfactory,
 710                                            "/Display as text", FALSE);
 711                 else
 712                         menu_set_sensitive(mimeview->popupfactory,
 713                                            "/Display as text", TRUE);
 714                 if (partinfo &&
 715                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 716                         menu_set_sensitive(mimeview->popupfactory,
 717                                            "/Open", FALSE);
 718                 else
 719                         menu_set_sensitive(mimeview->popupfactory,
 720                                            "/Open", TRUE);
 721
 722 #if USE_GPGME
 723                 menu_set_sensitive(mimeview->popupfactory,
 724                                    "/Check signature",
 725                                    mimeview_is_signed(mimeview));
 726 #endif
 727
 728                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 729                                NULL, NULL, NULL, NULL,
 730                                event->button, event->time);
 731         }
 732
 733         return TRUE;
 734 }
 735
 736 void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
 737 {
 738         mimeview_key_pressed(mimeview->ctree, event, mimeview);
 739 }
 740
 741 #define BREAK_ON_MODIFIER_KEY() \
 742         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 743
 744 #define KEY_PRESS_EVENT_STOP() \
 745         if (gtk_signal_n_emissions_by_name \
 746                 (GTK_OBJECT(ctree), "key_press_event") > 0) { \
 747                 gtk_signal_emit_stop_by_name(GTK_OBJECT(ctree), \
 748                                              "key_press_event"); \
 749         }
 750
 751 static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 752                                  MimeView *mimeview)
 753 {
 754         SummaryView *summaryview;
 755         GtkCTree *ctree = GTK_CTREE(widget);
 756         GtkCTreeNode *node;
 757
 758         if (!event) return FALSE;
 759         if (!mimeview->opened) return FALSE;
 760
 761         switch (event->keyval) {
 762         case GDK_space:
 763                 if (textview_scroll_page(mimeview->textview, FALSE))
 764                         return TRUE;
 765
 766                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 767                 if (node) {
 768                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 769                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 770                         return TRUE;
 771                 }
 772                 break;
 773         case GDK_BackSpace:
 774                 textview_scroll_page(mimeview->textview, TRUE);
 775                 return TRUE;
 776         case GDK_Return:
 777                 textview_scroll_one_line(mimeview->textview,
 778                                          (event->state & GDK_MOD1_MASK) != 0);
 779                 return TRUE;
 780         case GDK_n:
 781         case GDK_N:
 782                 BREAK_ON_MODIFIER_KEY();
 783                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 784                 KEY_PRESS_EVENT_STOP();
 785
 786                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 787                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 788                 return TRUE;
 789         case GDK_p:
 790         case GDK_P:
 791                 BREAK_ON_MODIFIER_KEY();
 792                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 793                 KEY_PRESS_EVENT_STOP();
 794
 795                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 796                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 797                 return TRUE;
 798         case GDK_y:
 799                 BREAK_ON_MODIFIER_KEY();
 800                 KEY_PRESS_EVENT_STOP();
 801                 mimeview_save_as(mimeview);
 802                 return TRUE;
 803         case GDK_t:
 804                 BREAK_ON_MODIFIER_KEY();
 805                 KEY_PRESS_EVENT_STOP();
 806                 mimeview_display_as_text(mimeview);
 807                 return TRUE;
 808         case GDK_l:
 809                 BREAK_ON_MODIFIER_KEY();
 810                 KEY_PRESS_EVENT_STOP();
 811                 mimeview_launch(mimeview);
 812                 return TRUE;
 813         default:
 814                 break;
 815         }
 816
 817         if (!mimeview->messageview->mainwin) return FALSE;
 818         summaryview = mimeview->messageview->mainwin->summaryview;
 819         summary_pass_key_press_event(summaryview, event);
 820         return TRUE;
 821 }
 822
 823 static void mimeview_drag_data_get(GtkWidget        *widget,
 824                                    GdkDragContext   *drag_context,
 825                                    GtkSelectionData *selection_data,
 826                                    guint             info,
 827                                    guint             time,
 828                                    MimeView         *mimeview)
 829 {
 830         gchar *filename, *uriname;
 831         MimeInfo *partinfo;
 832
 833         if (!mimeview->opened) return;
 834         if (!mimeview->file) return;
 835
 836         partinfo = mimeview_get_selected_part(mimeview);
 837         if (!partinfo) return;
 838         if (!partinfo->filename && !partinfo->name) return;
 839
 840         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 841         filename = g_basename(filename);
 842         if (*filename == '\0') return;
 843
 844         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 845                                filename, NULL);
 846
 847         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 848                 alertpanel_error
 849                         (_("Can't save the part of multipart message."));
 850
 851         uriname = g_strconcat("file:/", filename, NULL);
 852         gtk_selection_data_set(selection_data, selection_data->target, 8,
 853                                uriname, strlen(uriname));
 854
 855         g_free(uriname);
 856         g_free(filename);
 857 }
 858
 859 static void mimeview_save_all(MimeView *mimeview)
 860 {
 861         gchar *dirname;
 862         gchar *defname = NULL;
 863         MimeInfo *partinfo;
 864         MimeInfo *attachment;
 865         gchar buf[1024];
 866
 867         if (!mimeview->opened) return;
 868         if (!mimeview->file) return;
 869
 870         partinfo = mimeview_get_selected_part(mimeview);
 871         g_return_if_fail(partinfo != NULL);
 872
 873         dirname = filesel_select_file(_("Save as"), defname);
 874         if (!dirname) return;
 875
 876         /* return to first children */
 877         if (!partinfo->parent->children) return;  /* multipart container? */
 878         attachment = partinfo->parent->children->next;
 879         /* for each attachment, extract it in the selected dir. */
 880         while (attachment != NULL) {
 881                 static guint subst_cnt = 1;
 882                 gchar *attachdir;
 883                 gchar *attachname = g_strdup(get_part_name(attachment));
 884                 AlertValue aval = G_ALERTDEFAULT;
 885                 gchar *res;
 886
 887                 if (!attachname || !strlen(attachname))
 888                         attachname = g_strdup_printf("noname.%d",subst_cnt++);
 889                 subst_chars(attachname, ":?*&|<>\t\r\n", '_');
 890                 g_snprintf(buf, sizeof(buf), "%s%s",
 891                            dirname,
 892                            (attachname[0] == G_DIR_SEPARATOR)
 893                            ? &attachname[1]
 894                            : attachname);
 895                 subst_chars(buf, "/\\", G_DIR_SEPARATOR);
 896                 attachdir = g_dirname(buf);
 897                 make_dir_hier(attachdir);
 898                 g_free(attachdir);
 899
 900                 if (is_file_exist(buf)) {
 901                         res = g_strdup_printf(_("Overwrite existing file '%s'?"),
 902                                               attachname);
 903                         aval = alertpanel(_("Overwrite"), res, _("OK"),
 904                                           _("Cancel"), NULL);
 905                         g_free(res);
 906                 }
 907                 g_free(attachname);
 908
 909                 if ((G_ALERTDEFAULT != aval) || (procmime_get_part(buf, mimeview->file, attachment) < 0))
 910                         alertpanel_error(_("Can't save the part of multipart message."));
 911                 attachment = attachment->next;
 912         }
 913 }
 914
 915 static void mimeview_display_as_text(MimeView *mimeview)
 916 {
 917         MimeInfo *partinfo;
 918
 919         if (!mimeview->opened) return;
 920
 921         partinfo = mimeview_get_selected_part(mimeview);
 922         g_return_if_fail(partinfo != NULL);
 923         mimeview_show_message_part(mimeview, partinfo);
 924 }
 925
 926 static void mimeview_save_as(MimeView *mimeview)
 927 {
 928         gchar *filename;
 929         gchar *defname = NULL;
 930         MimeInfo *partinfo;
 931         gchar *res;
 932
 933         if (!mimeview->opened) return;
 934         if (!mimeview->file) return;
 935
 936         partinfo = mimeview_get_selected_part(mimeview);
 937         g_return_if_fail(partinfo != NULL);
 938
 939         if (partinfo->filename)
 940                 defname = partinfo->filename;
 941         else if (partinfo->name) {
 942                 Xstrdup_a(defname, partinfo->name, return);
 943                 subst_for_filename(defname);
 944         }
 945
 946         filename = filesel_select_file(_("Save as"), defname);
 947         if (!filename) return;
 948         if (is_file_exist(filename)) {
 949                 AlertValue aval;
 950                 res = g_strdup_printf(_("Overwrite existing file '%s'?"),
 951                                       filename);
 952                 aval = alertpanel(_("Overwrite"), res, _("OK"),
 953                                   _("Cancel"), NULL);
 954                 g_free(res);
 955                 if (G_ALERTDEFAULT != aval) return;
 956         }
 957
 958         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 959                 alertpanel_error
 960                         (_("Can't save the part of multipart message."));
 961 }
 962
 963 static void mimeview_launch(MimeView *mimeview)
 964 {
 965         MimeInfo *partinfo;
 966         gchar *filename;
 967
 968         if (!mimeview->opened) return;
 969         if (!mimeview->file) return;
 970
 971         partinfo = mimeview_get_selected_part(mimeview);
 972         g_return_if_fail(partinfo != NULL);
 973
 974         filename = procmime_get_tmp_file_name(partinfo);
 975
 976         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 977                 alertpanel_error
 978                         (_("Can't save the part of multipart message."));
 979         else
 980                 mimeview_view_file(filename, partinfo, NULL);
 981
 982         g_free(filename);
 983 }
 984
 985 static void mimeview_open_with(MimeView *mimeview)
 986 {
 987         MimeInfo *partinfo;
 988         gchar *filename;
 989         gchar *cmd;
 990
 991         if (!mimeview->opened) return;
 992         if (!mimeview->file) return;
 993
 994         partinfo = mimeview_get_selected_part(mimeview);
 995         g_return_if_fail(partinfo != NULL);
 996
 997         filename = procmime_get_tmp_file_name(partinfo);
 998
 999         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
1000                 alertpanel_error
1001                         (_("Can't save the part of multipart message."));
1002                 g_free(filename);
1003                 return;
1004         }
1005
1006         if (!prefs_common.mime_open_cmd_history)
1007                 prefs_common.mime_open_cmd_history =
1008                         add_history(NULL, prefs_common.mime_open_cmd);
1009
1010         cmd = input_dialog_combo
1011                 (_("Open with"),
1012                  _("Enter the command line to open file:\n"
1013                    "(`%s' will be replaced with file name)"),
1014                  prefs_common.mime_open_cmd,
1015                  prefs_common.mime_open_cmd_history,
1016                  TRUE);
1017         if (cmd) {
1018                 mimeview_view_file(filename, partinfo, cmd);
1019                 g_free(prefs_common.mime_open_cmd);
1020                 prefs_common.mime_open_cmd = cmd;
1021                 prefs_common.mime_open_cmd_history =
1022                         add_history(prefs_common.mime_open_cmd_history, cmd);
1023         }
1024
1025         g_free(filename);
1026 }
1027
1028 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
1029                                const gchar *cmdline)
1030 {
1031         static gchar *default_image_cmdline = "display '%s'";
1032         static gchar *default_audio_cmdline = "play '%s'";
1033         static gchar *default_html_cmdline = DEFAULT_BROWSER_CMD;
1034         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
1035         gchar buf[1024];
1036         gchar m_buf[1024];
1037         const gchar *cmd;
1038         const gchar *def_cmd;
1039         const gchar *p;
1040
1041         if (cmdline) {
1042                 cmd = cmdline;
1043                 def_cmd = NULL;
1044         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
1045                 return;
1046         } else if (MIME_IMAGE == partinfo->mime_type) {
1047                 cmd = prefs_common.mime_image_viewer;
1048                 def_cmd = default_image_cmdline;
1049         } else if (MIME_AUDIO == partinfo->mime_type) {
1050                 cmd = prefs_common.mime_audio_player;
1051                 def_cmd = default_audio_cmdline;
1052         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
1053                 cmd = prefs_common.uri_cmd;
1054                 def_cmd = default_html_cmdline;
1055         } else {
1056                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
1057                            partinfo->content_type, "%s");
1058                 cmd = m_buf;
1059                 def_cmd = NULL;
1060         }
1061
1062         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
1063             !strchr(p + 2, '%'))
1064                 g_snprintf(buf, sizeof(buf), cmd, filename);
1065         else {
1066                 if (cmd)
1067                         g_warning("MIME viewer command line is invalid: `%s'", cmd);
1068                 if (def_cmd)
1069                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
1070                 else
1071                         return;
1072         }
1073
1074         execute_command_line(buf, TRUE);
1075 }
1076
1077 #if USE_GPGME
1078 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
1079                              gpointer data)
1080 {
1081         MimeInfo *partinfo;
1082         gchar *part_name;
1083
1084         partinfo = gtk_ctree_node_get_row_data(ctree, node);
1085         g_return_if_fail(partinfo != NULL);
1086
1087         part_name = get_part_name(partinfo);
1088         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
1089 }
1090
1091 static void mimeview_update_names(MimeView *mimeview)
1092 {
1093         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
1094
1095         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
1096 }
1097
1098 static void mimeview_update_signature_info(MimeView *mimeview)
1099 {
1100         MimeInfo *partinfo;
1101
1102         if (!mimeview) return;
1103         if (!mimeview->opened) return;
1104
1105         partinfo = mimeview_get_selected_part(mimeview);
1106         if (!partinfo) return;
1107
1108         if (g_strcasecmp(partinfo->content_type,
1109                          "application/pgp-signature") == 0) {
1110                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
1111                 textview_show_signature_part(mimeview->textview, partinfo);
1112         }
1113 }
1114
1115 void mimeview_check_signature(MimeView *mimeview)
1116 {
1117         MimeInfo *mimeinfo;
1118         FILE *fp;
1119
1120         g_return_if_fail (mimeview_is_signed(mimeview));
1121         g_return_if_fail (gpg_started);
1122
1123         mimeinfo = gtk_ctree_node_get_row_data
1124                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1125         g_return_if_fail(mimeinfo != NULL);
1126         g_return_if_fail(mimeview->file != NULL);
1127
1128         while (mimeinfo->parent)
1129                 mimeinfo = mimeinfo->parent;
1130
1131         if ((fp = fopen(mimeview->file, "rb")) == NULL) {
1132                 FILE_OP_ERROR(mimeview->file, "fopen");
1133                 return;
1134         }
1135
1136         rfc2015_check_signature(mimeinfo, fp);
1137         fclose(fp);
1138
1139         mimeview_update_names(mimeview);
1140         mimeview_update_signature_info(mimeview);
1141
1142         textview_show_message(mimeview->messageview->textview, mimeinfo,
1143                               mimeview->file);
1144 }
1145 #endif /* USE_GPGME */
1146
1147 void mimeview_register_viewer_factory(MimeViewerFactory *factory)
1148 {
1149         mimeviewer_factories = g_slist_append(mimeviewer_factories, factory);
1150 }
1151
1152 static gint cmp_viewer_by_factroy(gconstpointer a, gconstpointer b)
1153 {
1154         return ((MimeViewer *) a)->factory == (MimeViewerFactory *) b ? 0 : -1;
1155 }
1156
1157 void mimeview_unregister_viewer_factory(MimeViewerFactory *factory)
1158 {
1159         GSList *mimeview_list, *viewer_list;
1160
1161         for (mimeview_list = mimeviews; mimeview_list != NULL; mimeview_list = g_slist_next(mimeview_list)) {
1162                 MimeView *mimeview = (MimeView *) mimeview_list->data;
1163
1164                 if (mimeview->mimeviewer && mimeview->mimeviewer->factory == factory) {
1165                         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
1166                         mimeview->mimeviewer = NULL;
1167                 }
1168
1169                 while ((viewer_list = g_slist_find_custom(mimeview->viewers, factory, cmp_viewer_by_factroy)) != NULL) {
1170                         MimeViewer *mimeviewer = (MimeViewer *) viewer_list->data;
1171
1172                         mimeviewer->destroy_viewer(mimeviewer);
1173                         mimeview->viewers = g_slist_remove(mimeview->viewers, mimeviewer);
1174                 }
1175         }
1176
1177         mimeviewer_factories = g_slist_remove(mimeviewer_factories, factory);
1178 }