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 #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 #include "pgptext.h"
  57
  58 typedef enum
  59 {
  60         COL_MIMETYPE = 0,
  61         COL_SIZE     = 1,
  62         COL_NAME     = 2
  63 } MimeViewColumnPos;
  64
  65 #define N_MIMEVIEW_COLS 3
  66
  67 static void mimeview_set_multipart_tree         (MimeView       *mimeview,
  68                                                  MimeInfo       *mimeinfo,
  69                                                  GtkCTreeNode   *parent);
  70 static GtkCTreeNode *mimeview_append_part       (MimeView       *mimeview,
  71                                                  MimeInfo       *partinfo,
  72                                                  GtkCTreeNode   *parent);
  73 static void mimeview_show_message_part          (MimeView       *mimeview,
  74                                                  MimeInfo       *partinfo);
  75 static void mimeview_show_image_part            (MimeView       *mimeview,
  76                                                  MimeInfo       *partinfo);
  77 static void mimeview_change_view_type           (MimeView       *mimeview,
  78                                                  MimeViewType    type);
  79 static void mimeview_clear                      (MimeView       *mimeview);
  80
  81 static void mimeview_selected           (GtkCTree       *ctree,
  82                                          GtkCTreeNode   *node,
  83                                          gint            column,
  84                                          MimeView       *mimeview);
  85 static void mimeview_start_drag         (GtkWidget      *widget,
  86                                          gint            button,
  87                                          GdkEvent       *event,
  88                                          MimeView       *mimeview);
  89 static gint mimeview_button_pressed     (GtkWidget      *widget,
  90                                          GdkEventButton *event,
  91                                          MimeView       *mimeview);
  92 static gint mimeview_key_pressed        (GtkWidget      *widget,
  93                                          GdkEventKey    *event,
  94                                          MimeView       *mimeview);
  95
  96 static void mimeview_drag_data_get      (GtkWidget        *widget,
  97                                          GdkDragContext   *drag_context,
  98                                          GtkSelectionData *selection_data,
  99                                          guint             info,
 100                                          guint             time,
 101                                          MimeView         *mimeview);
 102
 103 static void mimeview_display_as_text    (MimeView       *mimeview);
 104 static void mimeview_show_image         (MimeView       *mimeview);
 105 static void mimeview_save_as            (MimeView       *mimeview);
 106 static void mimeview_save_all           (MimeView       *mimeview);
 107 static void mimeview_launch             (MimeView       *mimeview);
 108 static void mimeview_open_with          (MimeView       *mimeview);
 109 static void mimeview_view_file          (const gchar    *filename,
 110                                          MimeInfo       *partinfo,
 111                                          const gchar    *cmdline);
 112
 113 static GtkItemFactoryEntry mimeview_popup_entries[] =
 114 {
 115         {N_("/_Open"),            NULL, mimeview_launch,          0, NULL},
 116         {N_("/Open _with..."),    NULL, mimeview_open_with,       0, NULL},
 117         {N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
 118         {N_("/_Display image"),   NULL, mimeview_show_image,      0, NULL},
 119         {N_("/_Save as..."),      NULL, mimeview_save_as,         0, NULL},
 120         {N_("/Save _all..."),     NULL, mimeview_save_all,        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 GSList *mimeviewer_factories;
 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             && (gpg_started))
 313                 rfc2015_check_signature(mimeinfo, fp);
 314         else
 315                 set_unchecked_signature(mimeinfo);
 316 #endif
 317
 318         gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), mimeview_selected,
 319                                          mimeview);
 320
 321         mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
 322
 323         gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree),
 324                                            mimeview_selected, mimeview);
 325
 326         /* search first text part */
 327         for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 328              node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
 329                 MimeInfo *partinfo;
 330
 331                 partinfo = gtk_ctree_node_get_row_data(ctree, node);
 332                 if (partinfo &&
 333                     (partinfo->mime_type == MIME_TEXT ||
 334                      partinfo->mime_type == MIME_TEXT_HTML))
 335                         break;
 336         }
 337         fclose(fp);
 338         textview_show_message(mimeview->messageview->textview, mimeinfo, file);
 339
 340         if (!node)
 341                 node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
 342
 343         if (node) {
 344                 gtk_ctree_select(ctree, node);
 345                 gtkut_ctree_set_focus_row(ctree, node);
 346                 gtk_widget_grab_focus(mimeview->ctree);
 347         }
 348 }
 349
 350 void mimeview_destroy(MimeView *mimeview)
 351 {
 352         GSList *cur;
 353
 354         for (cur = mimeview->viewers; cur != NULL; cur = g_slist_next(cur)) {
 355                 MimeViewer *viewer = (MimeViewer *) cur->data;
 356                 viewer->destroy_viewer(viewer);
 357         }
 358         g_slist_free(mimeview->viewers);
 359
 360         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 361         g_free(mimeview->file);
 362         g_free(mimeview);
 363 }
 364
 365 static void mimeview_set_multipart_tree(MimeView *mimeview,
 366                                         MimeInfo *mimeinfo,
 367                                         GtkCTreeNode *parent)
 368 {
 369         GtkCTreeNode *current = parent;
 370
 371         g_return_if_fail(mimeinfo != NULL);
 372
 373         if (!mimeinfo->sub && mimeinfo->parent)
 374                 current = mimeview_append_part(mimeview, mimeinfo, parent);
 375         if (mimeinfo->sub && !mimeinfo->sub->children &&
 376             mimeinfo->sub->mime_type != MIME_TEXT &&
 377             mimeinfo->sub->mime_type != MIME_TEXT_HTML) {
 378                 mimeview_append_part(mimeview, mimeinfo->sub, parent);
 379                 return;
 380         }
 381
 382         if (mimeinfo->sub)
 383                 mimeview_set_multipart_tree(mimeview, mimeinfo->sub, current);
 384
 385         if (mimeinfo->children)
 386                 mimeview_set_multipart_tree(mimeview, mimeinfo->children, current);
 387
 388         if (mimeinfo->next)
 389                 mimeview_set_multipart_tree(mimeview, mimeinfo->next, parent);
 390 }
 391
 392 static gchar *get_part_name(MimeInfo *partinfo)
 393 {
 394 #if USE_GPGME
 395         if (partinfo->sigstatus)
 396                 return partinfo->sigstatus;
 397         else
 398 #endif
 399         if (partinfo->name)
 400                 return partinfo->name;
 401         else if (partinfo->filename)
 402                 return partinfo->filename;
 403         else if (partinfo->description)
 404                 return partinfo->description;
 405         else
 406                 return "";
 407 }
 408
 409 static gchar *get_part_description(MimeInfo *partinfo)
 410 {
 411         if (partinfo->description)
 412                 return partinfo->description;
 413         else if (partinfo->name)
 414                 return partinfo->name;
 415         else if (partinfo->filename)
 416                 return partinfo->filename;
 417         else
 418                 return "";
 419 }
 420
 421 static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
 422                                           MimeInfo *partinfo,
 423                                           GtkCTreeNode *parent)
 424 {
 425         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
 426         GtkCTreeNode *node;
 427         gchar *str[N_MIMEVIEW_COLS];
 428
 429         str[COL_MIMETYPE] =
 430                 partinfo->content_type ? partinfo->content_type : "";
 431         str[COL_SIZE] = to_human_readable(partinfo->size);
 432         if (prefs_common.attach_desc)
 433                 str[COL_NAME] = get_part_description(partinfo);
 434         else
 435                 str[COL_NAME] = get_part_name(partinfo);
 436
 437         node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
 438                                      NULL, NULL, NULL, NULL,
 439                                      FALSE, TRUE);
 440         gtk_ctree_node_set_row_data(ctree, node, partinfo);
 441
 442         return node;
 443 }
 444
 445 static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
 446 {
 447         FILE *fp;
 448         const gchar *fname;
 449 #if USE_GPGME
 450         MimeInfo *pi;
 451 #endif
 452
 453         if (!partinfo) return;
 454
 455 #if USE_GPGME
 456         for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
 457                 ;
 458         fname = pi ? pi->plaintextfile : mimeview->file;
 459 #else
 460         fname = mimeview->file;
 461 #endif /* USE_GPGME */
 462         if (!fname) return;
 463
 464         if ((fp = fopen(fname, "rb")) == NULL) {
 465                 FILE_OP_ERROR(fname, "fopen");
 466                 return;
 467         }
 468
 469         if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
 470                 FILE_OP_ERROR(mimeview->file, "fseek");
 471                 fclose(fp);
 472                 return;
 473         }
 474
 475         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 476         textview_show_part(mimeview->textview, partinfo, fp);
 477
 478         fclose(fp);
 479 }
 480
 481 static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
 482 {
 483         gchar *filename;
 484
 485         if (!partinfo) return;
 486
 487         filename = procmime_get_tmp_file_name(partinfo);
 488
 489         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 490                 alertpanel_error
 491                         (_("Can't get the part of multipart message."));
 492         else {
 493                 mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
 494                 /* Workaround for the GTK+ bug with handling scroll adjustments
 495                  * in GtkViewport */
 496                 imageview_clear(mimeview->imageview);
 497                 imageview_show_image(mimeview->imageview, partinfo, filename,
 498                                      prefs_common.resize_image);
 499                 unlink(filename);
 500         }
 501
 502         g_free(filename);
 503 }
 504
 505 static MimeViewer *get_viewer_for_content_type(MimeView *mimeview, const gchar *content_type)
 506 {
 507         GSList *cur;
 508         MimeViewerFactory *factory = NULL;
 509         MimeViewer *viewer = NULL;
 510
 511         for (cur = mimeviewer_factories; cur != NULL; cur = g_slist_next(cur)) {
 512                 MimeViewerFactory *curfactory = cur->data;
 513
 514                 if(!fnmatch(curfactory->content_type, content_type, 0)) {
 515                         factory = curfactory;
 516                         break;
 517                 }
 518         }
 519         if (factory == NULL)
 520                 return NULL;
 521
 522         for (cur = mimeview->viewers; cur != NULL; cur = g_slist_next(cur)) {
 523                 MimeViewer *curviewer = cur->data;
 524
 525                 if (curviewer->factory == factory)
 526                         return curviewer;
 527         }
 528         viewer = factory->create_viewer();
 529         mimeview->viewers = g_slist_append(mimeview->viewers, viewer);
 530
 531         return viewer;
 532 }
 533
 534 static gboolean mimeview_show_part(MimeView *mimeview, MimeInfo *partinfo)
 535 {
 536         MimeViewer *viewer;
 537
 538         viewer = get_viewer_for_content_type(mimeview, partinfo->content_type);
 539         if (viewer == NULL) {
 540                 if (mimeview->mimeviewer != NULL)
 541                         mimeview->mimeviewer->clear_viewer(mimeview->mimeviewer);
 542                 mimeview->mimeviewer = NULL;
 543                 return FALSE;
 544         }
 545
 546         if (mimeview->mimeviewer != viewer) {
 547                 if (mimeview->mimeviewer != NULL)
 548                         mimeview->mimeviewer->clear_viewer(mimeview->mimeviewer);
 549                 mimeview->mimeviewer = viewer;
 550                 mimeview_change_view_type(mimeview, MIMEVIEW_VIEWER);
 551         }
 552         viewer->show_mimepart(viewer, mimeview->file, partinfo);
 553
 554         return TRUE;
 555 }
 556
 557 static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
 558 {
 559         TextView  *textview  = mimeview->textview;
 560         ImageView *imageview = mimeview->imageview;
 561         GList *children;
 562
 563         if ((mimeview->type != MIMEVIEW_VIEWER) &&
 564             (mimeview->type == type)) return;
 565
 566         children = gtk_container_children(GTK_CONTAINER(mimeview->mime_vbox));
 567         if (children) {
 568                 gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
 569                                        GTK_WIDGET(children->data));
 570                 g_list_free(children);
 571         }
 572
 573         switch (type) {
 574         case MIMEVIEW_IMAGE:
 575                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 576                                   GTK_WIDGET_PTR(imageview));
 577                 break;
 578         case MIMEVIEW_TEXT:
 579                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 580                                   GTK_WIDGET_PTR(textview));
 581                 break;
 582         case MIMEVIEW_VIEWER:
 583                 gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
 584                                   GTK_WIDGET(mimeview->mimeviewer->get_widget(mimeview->mimeviewer)));
 585                 break;
 586         default:
 587                 return;
 588         }
 589
 590         mimeview->type = type;
 591 }
 592
 593 static void mimeview_clear(MimeView *mimeview)
 594 {
 595         GtkCList *clist = GTK_CLIST(mimeview->ctree);
 596
 597         procmime_mimeinfo_free_all(mimeview->mimeinfo);
 598         mimeview->mimeinfo = NULL;
 599
 600         gtk_clist_clear(clist);
 601         textview_clear(mimeview->textview);
 602         imageview_clear(mimeview->imageview);
 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 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 646                 case MIME_IMAGE:
 647                         mimeview->textview->default_text = TRUE;
 648                         if (prefs_common.display_img)
 649                                 mimeview_show_image_part(mimeview, partinfo);
 650                         else {
 651                                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 652                                 textview_show_mime_part(mimeview->textview, partinfo);
 653                         }
 654                         break;
 655 #endif
 656                 default:
 657                         mimeview->textview->default_text = TRUE;
 658                         mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
 659 #if USE_GPGME
 660                         if (g_strcasecmp(partinfo->content_type,
 661                                          "application/pgp-signature") == 0)
 662                                 textview_show_signature_part(mimeview->textview,
 663                                                              partinfo);
 664                         else
 665 #endif
 666                                 textview_show_mime_part(mimeview->textview, partinfo);
 667                         break;
 668                 }
 669         }
 670 }
 671
 672 static void mimeview_start_drag(GtkWidget *widget, gint button,
 673                                 GdkEvent *event, MimeView *mimeview)
 674 {
 675         GtkTargetList *list;
 676         GdkDragContext *context;
 677         MimeInfo *partinfo;
 678         GtkCTree *ctree;
 679
 680         g_return_if_fail(mimeview != NULL);
 681         ctree = GTK_CTREE(mimeview->ctree);
 682         partinfo = gtk_ctree_node_get_row_data(ctree, mimeview->opened);
 683         if (partinfo->filename == NULL && partinfo->name == NULL) return;
 684
 685         list = gtk_target_list_new(mimeview_mime_types, 1);
 686         context = gtk_drag_begin(widget, list,
 687                                  GDK_ACTION_COPY, button, event);
 688         gtk_drag_set_icon_default(context);
 689 }
 690
 691 static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
 692                                     MimeView *mimeview)
 693 {
 694         GtkCList *clist = GTK_CLIST(widget);
 695         MimeInfo *partinfo;
 696         gint row, column;
 697
 698         if (!event) return FALSE;
 699
 700         if (event->button == 2 || event->button == 3) {
 701                 if (!gtk_clist_get_selection_info(clist, event->x, event->y,
 702                                                   &row, &column))
 703                         return FALSE;
 704                 gtk_clist_unselect_all(clist);
 705                 gtk_clist_select_row(clist, row, column);
 706                 gtkut_clist_set_focus_row(clist, row);
 707         }
 708
 709         if (event->button == 2 ||
 710             (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
 711                 /* call external program for image, audio or html */
 712                 mimeview_launch(mimeview);
 713         } else if (event->button == 3) {
 714                 partinfo = gtk_ctree_node_get_row_data
 715                         (GTK_CTREE(mimeview->ctree), mimeview->opened);
 716                 if (partinfo && (partinfo->mime_type == MIME_TEXT ||
 717                                  partinfo->mime_type == MIME_TEXT_HTML ||
 718                                  partinfo->mime_type == MIME_TEXT_ENRICHED ||
 719                                  partinfo->mime_type == MIME_MESSAGE_RFC822 ||
 720                                  partinfo->mime_type == MIME_IMAGE ||
 721                                  partinfo->mime_type == MIME_MULTIPART))
 722                         menu_set_sensitive(mimeview->popupfactory,
 723                                            "/Display as text", FALSE);
 724                 else
 725                         menu_set_sensitive(mimeview->popupfactory,
 726                                            "/Display as text", TRUE);
 727                 if (partinfo &&
 728                     partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
 729                         menu_set_sensitive(mimeview->popupfactory,
 730                                            "/Open", FALSE);
 731                 else
 732                         menu_set_sensitive(mimeview->popupfactory,
 733                                            "/Open", TRUE);
 734
 735 #if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
 736                 if (partinfo && (partinfo->mime_type == MIME_IMAGE))
 737                         menu_set_sensitive(mimeview->popupfactory,
 738                                            "/Display image", TRUE);
 739 #endif
 740 #if USE_GPGME
 741                 menu_set_sensitive(mimeview->popupfactory,
 742                                    "/Check signature",
 743                                    mimeview_is_signed(mimeview));
 744 #endif
 745
 746                 gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
 747                                NULL, NULL, NULL, NULL,
 748                                event->button, event->time);
 749         }
 750
 751         return TRUE;
 752 }
 753
 754 void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
 755 {
 756         mimeview_key_pressed(mimeview->ctree, event, mimeview);
 757 }
 758
 759 #define BREAK_ON_MODIFIER_KEY() \
 760         if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
 761
 762 #define KEY_PRESS_EVENT_STOP() \
 763         if (gtk_signal_n_emissions_by_name \
 764                 (GTK_OBJECT(ctree), "key_press_event") > 0) { \
 765                 gtk_signal_emit_stop_by_name(GTK_OBJECT(ctree), \
 766                                              "key_press_event"); \
 767         }
 768
 769 static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
 770                                  MimeView *mimeview)
 771 {
 772         SummaryView *summaryview;
 773         GtkCTree *ctree = GTK_CTREE(widget);
 774         GtkCTreeNode *node;
 775
 776         if (!event) return FALSE;
 777         if (!mimeview->opened) return FALSE;
 778
 779         switch (event->keyval) {
 780         case GDK_space:
 781                 if (textview_scroll_page(mimeview->textview, FALSE))
 782                         return TRUE;
 783
 784                 node = GTK_CTREE_NODE_NEXT(mimeview->opened);
 785                 if (node) {
 786                         gtk_sctree_unselect_all(GTK_SCTREE(ctree));
 787                         gtk_sctree_select(GTK_SCTREE(ctree), node);
 788                         return TRUE;
 789                 }
 790                 break;
 791         case GDK_BackSpace:
 792                 textview_scroll_page(mimeview->textview, TRUE);
 793                 return TRUE;
 794         case GDK_Return:
 795                 textview_scroll_one_line(mimeview->textview,
 796                                          (event->state & GDK_MOD1_MASK) != 0);
 797                 return TRUE;
 798         case GDK_n:
 799         case GDK_N:
 800                 BREAK_ON_MODIFIER_KEY();
 801                 if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
 802                 KEY_PRESS_EVENT_STOP();
 803
 804                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 805                                         GTK_SCROLL_STEP_FORWARD, 0.0);
 806                 return TRUE;
 807         case GDK_p:
 808         case GDK_P:
 809                 BREAK_ON_MODIFIER_KEY();
 810                 if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
 811                 KEY_PRESS_EVENT_STOP();
 812
 813                 gtk_signal_emit_by_name(GTK_OBJECT(ctree), "scroll_vertical",
 814                                         GTK_SCROLL_STEP_BACKWARD, 0.0);
 815                 return TRUE;
 816         case GDK_y:
 817                 BREAK_ON_MODIFIER_KEY();
 818                 KEY_PRESS_EVENT_STOP();
 819                 mimeview_save_as(mimeview);
 820                 return TRUE;
 821         case GDK_t:
 822                 BREAK_ON_MODIFIER_KEY();
 823                 KEY_PRESS_EVENT_STOP();
 824                 mimeview_display_as_text(mimeview);
 825                 return TRUE;
 826         case GDK_i:
 827                 BREAK_ON_MODIFIER_KEY();
 828                 KEY_PRESS_EVENT_STOP();
 829                 mimeview_show_image(mimeview);
 830                 return TRUE;
 831         case GDK_l:
 832                 BREAK_ON_MODIFIER_KEY();
 833                 KEY_PRESS_EVENT_STOP();
 834                 mimeview_launch(mimeview);
 835                 return TRUE;
 836         default:
 837                 break;
 838         }
 839
 840         if (!mimeview->messageview->mainwin) return FALSE;
 841         summaryview = mimeview->messageview->mainwin->summaryview;
 842         summary_pass_key_press_event(summaryview, event);
 843         return TRUE;
 844 }
 845
 846 static void mimeview_drag_data_get(GtkWidget        *widget,
 847                                    GdkDragContext   *drag_context,
 848                                    GtkSelectionData *selection_data,
 849                                    guint             info,
 850                                    guint             time,
 851                                    MimeView         *mimeview)
 852 {
 853         gchar *filename, *uriname;
 854         MimeInfo *partinfo;
 855
 856         if (!mimeview->opened) return;
 857         if (!mimeview->file) return;
 858
 859         partinfo = gtk_ctree_node_get_row_data
 860                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 861         if (!partinfo) return;
 862         if (!partinfo->filename && !partinfo->name) return;
 863
 864         filename = partinfo->filename ? partinfo->filename : partinfo->name;
 865         filename = g_basename(filename);
 866         if (*filename == '\0') return;
 867
 868         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 869                                filename, NULL);
 870
 871         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 872                 alertpanel_error
 873                         (_("Can't save the part of multipart message."));
 874
 875         uriname = g_strconcat("file:/", filename, NULL);
 876         gtk_selection_data_set(selection_data, selection_data->target, 8,
 877                                uriname, strlen(uriname));
 878
 879         g_free(uriname);
 880         g_free(filename);
 881 }
 882
 883 static void mimeview_save_all(MimeView *mimeview)
 884 {
 885         gchar *dirname;
 886         gchar *defname = NULL;
 887         MimeInfo *partinfo;
 888         MimeInfo *attachment;
 889         gchar buf[1024];
 890
 891         if (!mimeview->opened) return;
 892         if (!mimeview->file) return;
 893
 894         partinfo = gtk_ctree_node_get_row_data
 895                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 896         g_return_if_fail(partinfo != NULL);
 897
 898         dirname = filesel_select_file(_("Save as"), defname);
 899         if (!dirname) return;
 900
 901         /* return to first children */
 902         if (!partinfo->parent->children) return;  /* multipart container? */
 903         attachment = partinfo->parent->children->next;
 904         /* for each attachment, extract it in the selected dir. */
 905         while (attachment != NULL) {
 906                 static guint subst_cnt = 1;
 907                 gchar *attachdir;
 908                 gchar *attachname = g_strdup(get_part_name(attachment));
 909                 AlertValue aval = G_ALERTDEFAULT;
 910                 gchar *res;
 911
 912                 if (!attachname || !strlen(attachname))
 913                         attachname = g_strdup_printf("noname.%d",subst_cnt++);
 914                 subst_chars(attachname, ":?*&|<>\t\r\n", '_');
 915                 g_snprintf(buf, sizeof(buf), "%s%s",
 916                            dirname,
 917                            (attachname[0] == G_DIR_SEPARATOR)
 918                            ? &attachname[1]
 919                            : attachname);
 920                 subst_chars(buf, "/\\", G_DIR_SEPARATOR);
 921                 attachdir = g_dirname(buf);
 922                 make_dir_hier(attachdir);
 923                 g_free(attachdir);
 924
 925                 if (is_file_exist(buf)) {
 926                         res = g_strdup_printf(_("Overwrite existing file '%s'?"),
 927                                               attachname);
 928                         aval = alertpanel(_("Overwrite"), res, _("OK"),
 929                                           _("Cancel"), NULL);
 930                         g_free(res);
 931                 }
 932                 g_free(attachname);
 933
 934                 if ((G_ALERTDEFAULT != aval) || (procmime_get_part(buf, mimeview->file, attachment) < 0))
 935                         alertpanel_error(_("Can't save the part of multipart message."));
 936                 attachment = attachment->next;
 937         }
 938 }
 939
 940 static void mimeview_display_as_text(MimeView *mimeview)
 941 {
 942         MimeInfo *partinfo;
 943
 944         if (!mimeview->opened) return;
 945
 946         partinfo = gtk_ctree_node_get_row_data
 947                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 948         mimeview_show_message_part(mimeview, partinfo);
 949 }
 950
 951 static void mimeview_show_image(MimeView *mimeview)
 952 {
 953         MimeInfo *partinfo;
 954
 955         if (!mimeview->opened) return;
 956
 957         partinfo = gtk_ctree_node_get_row_data
 958                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 959         mimeview_show_image_part(mimeview, partinfo);
 960 }
 961
 962 static void mimeview_save_as(MimeView *mimeview)
 963 {
 964         gchar *filename;
 965         gchar *defname = NULL;
 966         MimeInfo *partinfo;
 967         gchar *res;
 968
 969         if (!mimeview->opened) return;
 970         if (!mimeview->file) return;
 971
 972         partinfo = gtk_ctree_node_get_row_data
 973                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
 974         g_return_if_fail(partinfo != NULL);
 975
 976         if (partinfo->filename)
 977                 defname = partinfo->filename;
 978         else if (partinfo->name) {
 979                 Xstrdup_a(defname, partinfo->name, return);
 980                 subst_for_filename(defname);
 981         }
 982
 983         filename = filesel_select_file(_("Save as"), defname);
 984         if (!filename) return;
 985         if (is_file_exist(filename)) {
 986                 AlertValue aval;
 987                 res = g_strdup_printf(_("Overwrite existing file '%s'?"),
 988                                       filename);
 989                 aval = alertpanel(_("Overwrite"), res, _("OK"),
 990                                   _("Cancel"), NULL);
 991                 g_free(res);
 992                 if (G_ALERTDEFAULT != aval) return;
 993         }
 994
 995         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
 996                 alertpanel_error
 997                         (_("Can't save the part of multipart message."));
 998 }
 999
1000 static void mimeview_launch(MimeView *mimeview)
1001 {
1002         MimeInfo *partinfo;
1003         gchar *filename;
1004
1005         if (!mimeview->opened) return;
1006         if (!mimeview->file) return;
1007
1008         partinfo = gtk_ctree_node_get_row_data
1009                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1010         g_return_if_fail(partinfo != NULL);
1011
1012         filename = procmime_get_tmp_file_name(partinfo);
1013
1014         if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
1015                 alertpanel_error
1016                         (_("Can't save the part of multipart message."));
1017         else
1018                 mimeview_view_file(filename, partinfo, NULL);
1019
1020         g_free(filename);
1021 }
1022
1023 static void mimeview_open_with(MimeView *mimeview)
1024 {
1025         MimeInfo *partinfo;
1026         gchar *filename;
1027         gchar *cmd;
1028
1029         if (!mimeview->opened) return;
1030         if (!mimeview->file) return;
1031
1032         partinfo = gtk_ctree_node_get_row_data
1033                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1034         g_return_if_fail(partinfo != NULL);
1035
1036         filename = procmime_get_tmp_file_name(partinfo);
1037
1038         if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
1039                 alertpanel_error
1040                         (_("Can't save the part of multipart message."));
1041                 g_free(filename);
1042                 return;
1043         }
1044
1045         if (!prefs_common.mime_open_cmd_history)
1046                 prefs_common.mime_open_cmd_history =
1047                         add_history(NULL, prefs_common.mime_open_cmd);
1048
1049         cmd = input_dialog_combo
1050                 (_("Open with"),
1051                  _("Enter the command line to open file:\n"
1052                    "(`%s' will be replaced with file name)"),
1053                  prefs_common.mime_open_cmd,
1054                  prefs_common.mime_open_cmd_history,
1055                  TRUE);
1056         if (cmd) {
1057                 mimeview_view_file(filename, partinfo, cmd);
1058                 g_free(prefs_common.mime_open_cmd);
1059                 prefs_common.mime_open_cmd = cmd;
1060                 prefs_common.mime_open_cmd_history =
1061                         add_history(prefs_common.mime_open_cmd_history, cmd);
1062         }
1063
1064         g_free(filename);
1065 }
1066
1067 static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
1068                                const gchar *cmdline)
1069 {
1070         static gchar *default_image_cmdline = "display '%s'";
1071         static gchar *default_audio_cmdline = "play '%s'";
1072         static gchar *default_html_cmdline = DEFAULT_BROWSER_CMD;
1073         static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
1074         gchar buf[1024];
1075         gchar m_buf[1024];
1076         const gchar *cmd;
1077         const gchar *def_cmd;
1078         const gchar *p;
1079
1080         if (cmdline) {
1081                 cmd = cmdline;
1082                 def_cmd = NULL;
1083         } else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
1084                 return;
1085         } else if (MIME_IMAGE == partinfo->mime_type) {
1086                 cmd = prefs_common.mime_image_viewer;
1087                 def_cmd = default_image_cmdline;
1088         } else if (MIME_AUDIO == partinfo->mime_type) {
1089                 cmd = prefs_common.mime_audio_player;
1090                 def_cmd = default_audio_cmdline;
1091         } else if (MIME_TEXT_HTML == partinfo->mime_type) {
1092                 cmd = prefs_common.uri_cmd;
1093                 def_cmd = default_html_cmdline;
1094         } else {
1095                 g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
1096                            partinfo->content_type, "%s");
1097                 cmd = m_buf;
1098                 def_cmd = NULL;
1099         }
1100
1101         if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
1102             !strchr(p + 2, '%'))
1103                 g_snprintf(buf, sizeof(buf), cmd, filename);
1104         else {
1105                 if (cmd)
1106                         g_warning("MIME viewer command line is invalid: `%s'", cmd);
1107                 if (def_cmd)
1108                         g_snprintf(buf, sizeof(buf), def_cmd, filename);
1109                 else
1110                         return;
1111         }
1112
1113         execute_command_line(buf, TRUE);
1114 }
1115
1116 #if USE_GPGME
1117 static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
1118                              gpointer data)
1119 {
1120         MimeInfo *partinfo;
1121         gchar *part_name;
1122
1123         partinfo = gtk_ctree_node_get_row_data(ctree, node);
1124         g_return_if_fail(partinfo != NULL);
1125
1126         part_name = get_part_name(partinfo);
1127         gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
1128 }
1129
1130 static void mimeview_update_names(MimeView *mimeview)
1131 {
1132         GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
1133
1134         gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
1135 }
1136
1137 static void mimeview_update_signature_info(MimeView *mimeview)
1138 {
1139         MimeInfo *partinfo;
1140
1141         if (!mimeview) return;
1142         if (!mimeview->opened) return;
1143
1144         partinfo = gtk_ctree_node_get_row_data
1145                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1146         if (!partinfo) return;
1147
1148         if (g_strcasecmp(partinfo->content_type,
1149                          "application/pgp-signature") == 0) {
1150                 mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
1151                 textview_show_signature_part(mimeview->textview, partinfo);
1152         }
1153 }
1154
1155 void mimeview_check_signature(MimeView *mimeview)
1156 {
1157         MimeInfo *mimeinfo;
1158         FILE *fp;
1159
1160         g_return_if_fail (mimeview_is_signed(mimeview));
1161         g_return_if_fail (gpg_started);
1162
1163         mimeinfo = gtk_ctree_node_get_row_data
1164                 (GTK_CTREE(mimeview->ctree), mimeview->opened);
1165         g_return_if_fail(mimeinfo != NULL);
1166         g_return_if_fail(mimeview->file != NULL);
1167
1168         while (mimeinfo->parent)
1169                 mimeinfo = mimeinfo->parent;
1170
1171         if ((fp = fopen(mimeview->file, "rb")) == NULL) {
1172                 FILE_OP_ERROR(mimeview->file, "fopen");
1173                 return;
1174         }
1175
1176         rfc2015_check_signature(mimeinfo, fp);
1177         fclose(fp);
1178
1179         mimeview_update_names(mimeview);
1180         mimeview_update_signature_info(mimeview);
1181
1182         textview_show_message(mimeview->messageview->textview, mimeinfo,
1183                               mimeview->file);
1184 }
1185 #endif /* USE_GPGME */
1186
1187 void mimeview_register_viewer_factory(MimeViewerFactory *factory)
1188 {
1189         mimeviewer_factories = g_slist_append(mimeviewer_factories, factory);
1190 }
1191
1192 void mimeview_unregister_viewer_factory(MimeViewerFactory *factory)
1193 {
1194         mimeviewer_factories = g_slist_remove(mimeviewer_factories, factory);
1195 }