Initial import of Sylpheed (GTK2 version).

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@1 ee746299-78ed-0310-b773-934348b2243d

1 files changed, 998 insertions, 0 deletions

diff --git a/src/mimeview.c b/src/mimeview.c
new file mode 100644
index 00000000..3d36c4f8
--- /dev/null
+++ b/src/mimeview.c
@@ -0,0 +1,998 @@
+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2004 Hiroyuki Yamamoto
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "defs.h"
+
+#include <glib.h>
+#include <gdk/gdkkeysyms.h>
+#include <gtk/gtknotebook.h>
+#include <gtk/gtkscrolledwindow.h>
+#include <gtk/gtkctree.h>
+#include <gtk/gtkvbox.h>
+#include <gtk/gtkvpaned.h>
+#include <gtk/gtksignal.h>
+#include <gtk/gtkmenu.h>
+#include <gtk/gtkdnd.h>
+#include <gtk/gtkselection.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "intl.h"
+#include "main.h"
+#include "mimeview.h"
+#include "textview.h"
+#include "imageview.h"
+#include "procmime.h"
+#include "summaryview.h"
+#include "menu.h"
+#include "filesel.h"
+#include "alertpanel.h"
+#include "inputdialog.h"
+#include "utils.h"
+#include "gtkutils.h"
+#include "prefs_common.h"
+#include "rfc2015.h"
+
+typedef enum
+{
+	COL_MIMETYPE = 0,
+	COL_SIZE     = 1,
+	COL_NAME     = 2
+} MimeViewColumnPos;
+
+#define N_MIMEVIEW_COLS	3
+
+static void mimeview_set_multipart_tree		(MimeView	*mimeview,
+						 MimeInfo	*mimeinfo,
+						 GtkCTreeNode	*parent);
+static GtkCTreeNode *mimeview_append_part	(MimeView	*mimeview,
+						 MimeInfo	*partinfo,
+						 GtkCTreeNode	*parent);
+static void mimeview_show_message_part		(MimeView	*mimeview,
+						 MimeInfo	*partinfo);
+static void mimeview_show_image_part		(MimeView	*mimeview,
+						 MimeInfo	*partinfo);
+static void mimeview_change_view_type		(MimeView	*mimeview,
+						 MimeViewType	 type);
+
+static void mimeview_selected		(GtkCTree	*ctree,
+					 GtkCTreeNode	*node,
+					 gint		 column,
+					 MimeView	*mimeview);
+static void mimeview_start_drag 	(GtkWidget	*widget,
+					 gint		 button,
+					 GdkEvent	*event,
+					 MimeView	*mimeview);
+static gint mimeview_button_pressed	(GtkWidget	*widget,
+					 GdkEventButton	*event,
+					 MimeView	*mimeview);
+static gint mimeview_key_pressed	(GtkWidget	*widget,
+					 GdkEventKey	*event,
+					 MimeView	*mimeview);
+
+static void mimeview_drag_data_get      (GtkWidget	  *widget,
+					 GdkDragContext   *drag_context,
+					 GtkSelectionData *selection_data,
+					 guint		   info,
+					 guint		   time,
+					 MimeView	  *mimeview);
+
+static void mimeview_display_as_text	(MimeView	*mimeview);
+static void mimeview_save_as		(MimeView	*mimeview);
+static void mimeview_launch		(MimeView	*mimeview);
+static void mimeview_open_with		(MimeView	*mimeview);
+static void mimeview_view_file		(const gchar	*filename,
+					 MimeInfo	*partinfo,
+					 const gchar	*cmdline);
+#if USE_GPGME
+static void mimeview_check_signature	(MimeView	*mimeview);
+#endif
+
+static GtkItemFactoryEntry mimeview_popup_entries[] =
+{
+	{N_("/_Open"),		  NULL, mimeview_launch,	  0, NULL},
+	{N_("/Open _with..."),	  NULL, mimeview_open_with,	  0, NULL},
+	{N_("/_Display as text"), NULL, mimeview_display_as_text, 0, NULL},
+	{N_("/_Save as..."),	  NULL, mimeview_save_as,	  0, NULL}
+#if USE_GPGME
+        ,
+        {N_("/_Check signature"), NULL, mimeview_check_signature, 0, NULL}
+#endif
+};
+
+static GtkTargetEntry mimeview_mime_types[] =
+{
+	{"text/uri-list", 0, 0}
+};
+
+MimeView *mimeview_create(void)
+{
+	MimeView *mimeview;
+
+	GtkWidget *notebook;
+	GtkWidget *vbox;
+	GtkWidget *paned;
+	GtkWidget *scrolledwin;
+	GtkWidget *ctree;
+	GtkWidget *mime_vbox;
+	GtkWidget *popupmenu;
+	GtkItemFactory *popupfactory;
+	gchar *titles[N_MIMEVIEW_COLS];
+	gint n_entries;
+	gint i;
+
+	debug_print(_("Creating MIME view...\n"));
+	mimeview = g_new0(MimeView, 1);
+
+	titles[COL_MIMETYPE] = _("MIME Type");
+	titles[COL_SIZE]     = _("Size");
+	titles[COL_NAME]     = _("Name");
+
+	notebook = gtk_notebook_new();
+	gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook), TRUE);
+
+	vbox = gtk_vbox_new(FALSE, 0);
+	gtk_container_add(GTK_CONTAINER(notebook), vbox);
+	gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), vbox,
+					_("Text"));
+
+	scrolledwin = gtk_scrolled_window_new(NULL, NULL);
+	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwin),
+				       GTK_POLICY_AUTOMATIC,
+				       GTK_POLICY_ALWAYS);
+	gtk_widget_set_size_request(scrolledwin, -1, 80);
+
+	ctree = gtk_sctree_new_with_titles(N_MIMEVIEW_COLS, 0, titles);
+	gtk_clist_set_selection_mode(GTK_CLIST(ctree), GTK_SELECTION_BROWSE);
+	gtk_ctree_set_line_style(GTK_CTREE(ctree), GTK_CTREE_LINES_NONE);
+	gtk_clist_set_column_justification(GTK_CLIST(ctree), COL_SIZE,
+					   GTK_JUSTIFY_RIGHT);
+	gtk_clist_set_column_width(GTK_CLIST(ctree), COL_MIMETYPE, 240);
+	gtk_clist_set_column_width(GTK_CLIST(ctree), COL_SIZE, 64);
+	for (i = 0; i < N_MIMEVIEW_COLS; i++)
+		GTK_WIDGET_UNSET_FLAGS(GTK_CLIST(ctree)->column[i].button,
+				       GTK_CAN_FOCUS);
+	gtk_container_add(GTK_CONTAINER(scrolledwin), ctree);
+
+	g_signal_connect(G_OBJECT(ctree), "tree_select_row",
+			 G_CALLBACK(mimeview_selected), mimeview);
+	g_signal_connect(G_OBJECT(ctree), "button_press_event",
+			 G_CALLBACK(mimeview_button_pressed), mimeview);
+	g_signal_connect(G_OBJECT(ctree), "key_press_event",
+			 G_CALLBACK(mimeview_key_pressed), mimeview);
+	g_signal_connect(G_OBJECT (ctree),"start_drag",
+			 G_CALLBACK (mimeview_start_drag), mimeview);
+	g_signal_connect(G_OBJECT(ctree), "drag_data_get",
+			 G_CALLBACK(mimeview_drag_data_get), mimeview);
+    
+	mime_vbox = gtk_vbox_new(FALSE, 0);
+
+	paned = gtk_vpaned_new();
+	gtk_paned_add1(GTK_PANED(paned), scrolledwin);
+	gtk_paned_add2(GTK_PANED(paned), mime_vbox);
+	gtk_container_add(GTK_CONTAINER(notebook), paned);
+	gtk_notebook_set_tab_label_text(GTK_NOTEBOOK(notebook), paned,
+					_("Attachments"));
+
+	gtk_widget_show_all(notebook);
+
+	gtk_notebook_set_current_page(GTK_NOTEBOOK(notebook), 0);
+
+	n_entries = sizeof(mimeview_popup_entries) /
+		sizeof(mimeview_popup_entries[0]);
+	popupmenu = menu_create_items(mimeview_popup_entries, n_entries,
+				      "<MimeView>", &popupfactory, mimeview);
+
+	mimeview->notebook     = notebook;
+	mimeview->vbox         = vbox;
+	mimeview->paned        = paned;
+	mimeview->scrolledwin  = scrolledwin;
+	mimeview->ctree        = ctree;
+	mimeview->mime_vbox    = mime_vbox;
+	mimeview->popupmenu    = popupmenu;
+	mimeview->popupfactory = popupfactory;
+	mimeview->type         = -1;
+
+	return mimeview;
+}
+
+void mimeview_init(MimeView *mimeview)
+{
+	textview_init(mimeview->textview);
+	imageview_init(mimeview->imageview);
+}
+
+/* 
+ * Check whether the message is OpenPGP signed
+ */
+#if USE_GPGME
+static gboolean mimeview_is_signed(MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+
+        debug_print("mimeview_is signed of %p\n", mimeview);
+
+        if (!mimeview) return FALSE;
+	if (!mimeview->opened) return FALSE;
+
+        debug_print("mimeview_is_signed: open\n" );
+
+	if (!mimeview->file) return FALSE;
+
+        debug_print("mimeview_is_signed: file\n" );
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	g_return_val_if_fail(partinfo != NULL, FALSE);
+
+	/* walk the tree and see whether there is a signature somewhere */
+	do {
+		if (rfc2015_has_signature(partinfo))
+			return TRUE;
+        } while ((partinfo = partinfo->parent) != NULL);
+
+	debug_print("mimeview_is_signed: FALSE\n" );
+
+	return FALSE;
+}
+
+static void set_unchecked_signature(MimeInfo *mimeinfo)
+{
+	MimeInfo *sig_partinfo;
+
+	sig_partinfo = rfc2015_find_signature(mimeinfo);
+	if (sig_partinfo == NULL) return;
+
+	g_free(sig_partinfo->sigstatus);
+	sig_partinfo->sigstatus =
+		g_strdup(_("Select \"Check signature\" to check"));
+
+	g_free(sig_partinfo->sigstatus_full);
+	sig_partinfo->sigstatus_full = NULL;
+}
+#endif /* USE_GPGME */
+
+void mimeview_show_message(MimeView *mimeview, MimeInfo *mimeinfo,
+			   const gchar *file)
+{
+	GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
+	GtkCTreeNode *node;
+
+	mimeview_clear(mimeview);
+	textview_clear(mimeview->messageview->textview);
+
+	g_return_if_fail(file != NULL);
+	g_return_if_fail(mimeinfo != NULL);
+
+	mimeview->mimeinfo = mimeinfo;
+
+	mimeview->file = g_strdup(file);
+
+#if USE_GPGME
+	if (prefs_common.auto_check_signatures) {
+		FILE *fp;
+
+		if ((fp = fopen(file, "rb")) == NULL) {
+			FILE_OP_ERROR(file, "fopen");
+			return;
+		}
+		rfc2015_check_signature(mimeinfo, fp);
+		fclose(fp);
+	} else
+		set_unchecked_signature(mimeinfo);
+#endif
+
+	g_signal_handlers_block_by_func
+		(G_OBJECT(ctree), G_CALLBACK(mimeview_selected), mimeview);
+
+	mimeview_set_multipart_tree(mimeview, mimeinfo, NULL);
+
+	g_signal_handlers_unblock_by_func
+		(G_OBJECT(ctree), G_CALLBACK(mimeview_selected), mimeview);
+
+	/* search first text part */
+	for (node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
+	     node != NULL; node = GTK_CTREE_NODE_NEXT(node)) {
+		MimeInfo *partinfo;
+
+		partinfo = gtk_ctree_node_get_row_data(ctree, node);
+		if (partinfo &&
+		    (partinfo->mime_type == MIME_TEXT ||
+		     partinfo->mime_type == MIME_TEXT_HTML))
+			break;
+	}
+	textview_show_message(mimeview->messageview->textview, mimeinfo, file);
+
+	if (!node)
+		node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
+
+	if (node) {
+		gtk_ctree_select(ctree, node);
+		gtkut_ctree_set_focus_row(ctree, node);
+		gtk_widget_grab_focus(mimeview->ctree);
+	}
+}
+
+void mimeview_clear(MimeView *mimeview)
+{
+	GtkCList *clist = GTK_CLIST(mimeview->ctree);
+
+	procmime_mimeinfo_free_all(mimeview->mimeinfo);
+	mimeview->mimeinfo = NULL;
+
+	gtk_clist_clear(clist);
+	textview_clear(mimeview->textview);
+	imageview_clear(mimeview->imageview);
+
+	mimeview->opened = NULL;
+
+	g_free(mimeview->file);
+	mimeview->file = NULL;
+
+	/* gtk_notebook_set_page(GTK_NOTEBOOK(mimeview->notebook), 0); */
+}
+
+void mimeview_destroy(MimeView *mimeview)
+{
+	textview_destroy(mimeview->textview);
+	imageview_destroy(mimeview->imageview);
+	procmime_mimeinfo_free_all(mimeview->mimeinfo);
+	g_free(mimeview->file);
+	g_free(mimeview);
+}
+
+MimeInfo *mimeview_get_selected_part(MimeView *mimeview)
+{
+	if (gtk_notebook_get_current_page
+		(GTK_NOTEBOOK(mimeview->notebook)) == 0)
+		return NULL;
+
+	return gtk_ctree_node_get_row_data
+		(GTK_CTREE(mimeview->ctree), mimeview->opened);
+}
+
+static void mimeview_set_multipart_tree(MimeView *mimeview,
+					MimeInfo *mimeinfo,
+					GtkCTreeNode *parent)
+{
+	GtkCTreeNode *node;
+
+	g_return_if_fail(mimeinfo != NULL);
+
+	if (mimeinfo->children)
+		mimeinfo = mimeinfo->children;
+
+	while (mimeinfo != NULL) {
+		node = mimeview_append_part(mimeview, mimeinfo, parent);
+
+		if (mimeinfo->children)
+			mimeview_set_multipart_tree(mimeview, mimeinfo, node);
+		else if (mimeinfo->sub &&
+			 mimeinfo->sub->mime_type != MIME_TEXT &&
+			 mimeinfo->sub->mime_type != MIME_TEXT_HTML)
+			mimeview_set_multipart_tree(mimeview, mimeinfo->sub,
+						    node);
+		mimeinfo = mimeinfo->next;
+	}
+}
+
+static gchar *get_part_name(MimeInfo *partinfo)
+{
+#if USE_GPGME
+	if (partinfo->sigstatus)
+		return partinfo->sigstatus;
+	else
+#endif
+	if (partinfo->name)
+		return partinfo->name;
+	else if (partinfo->filename)
+		return partinfo->filename;
+	else
+		return "";
+}
+
+static GtkCTreeNode *mimeview_append_part(MimeView *mimeview,
+					  MimeInfo *partinfo,
+					  GtkCTreeNode *parent)
+{
+	GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
+	GtkCTreeNode *node;
+	gchar *str[N_MIMEVIEW_COLS];
+
+	str[COL_MIMETYPE] =
+		partinfo->content_type ? partinfo->content_type : "";
+	str[COL_SIZE] = to_human_readable(partinfo->size);
+	str[COL_NAME] = get_part_name(partinfo);
+
+	node = gtk_ctree_insert_node(ctree, parent, NULL, str, 0,
+				     NULL, NULL, NULL, NULL,
+				     FALSE, TRUE);
+	gtk_ctree_node_set_row_data(ctree, node, partinfo);
+
+	return node;
+}
+
+static void mimeview_show_message_part(MimeView *mimeview, MimeInfo *partinfo)
+{
+	FILE *fp;
+	const gchar *fname;
+#if USE_GPGME
+	MimeInfo *pi;
+#endif
+
+	if (!partinfo) return;
+
+#if USE_GPGME
+	for (pi = partinfo; pi && !pi->plaintextfile ; pi = pi->parent)
+		;
+	fname = pi ? pi->plaintextfile : mimeview->file;
+#else
+	fname = mimeview->file;
+#endif /* USE_GPGME */
+	if (!fname) return;
+
+	if ((fp = fopen(fname, "rb")) == NULL) {
+		FILE_OP_ERROR(fname, "fopen");
+		return;
+	}
+
+	if (fseek(fp, partinfo->fpos, SEEK_SET) < 0) {
+		FILE_OP_ERROR(mimeview->file, "fseek");
+		fclose(fp);
+		return;
+	}
+
+	mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
+	textview_show_part(mimeview->textview, partinfo, fp);
+
+	fclose(fp);
+}
+
+static void mimeview_show_image_part(MimeView *mimeview, MimeInfo *partinfo)
+{
+	gchar *filename;
+
+	if (!partinfo) return;
+
+	filename = procmime_get_tmp_file_name(partinfo);
+
+	if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
+		alertpanel_error
+			(_("Can't get the part of multipart message."));
+	else {
+		mimeview_change_view_type(mimeview, MIMEVIEW_IMAGE);
+		imageview_show_image(mimeview->imageview, partinfo, filename,
+				     prefs_common.resize_image);
+		unlink(filename);
+	}
+
+	g_free(filename);
+}
+
+static void mimeview_change_view_type(MimeView *mimeview, MimeViewType type)
+{
+	TextView  *textview  = mimeview->textview;
+	ImageView *imageview = mimeview->imageview;
+	GList *children;
+
+	if (mimeview->type == type) return;
+
+	children = gtk_container_get_children
+		(GTK_CONTAINER(mimeview->mime_vbox));
+	if (children) {
+		gtkut_container_remove(GTK_CONTAINER(mimeview->mime_vbox),
+				       GTK_WIDGET(children->data));
+		g_list_free(children);
+	}
+
+	switch (type) {
+	case MIMEVIEW_IMAGE:
+		gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
+				  GTK_WIDGET_PTR(imageview));
+		break;
+	case MIMEVIEW_TEXT:
+		gtk_container_add(GTK_CONTAINER(mimeview->mime_vbox),
+				  GTK_WIDGET_PTR(textview));
+		break;
+	default:
+		return;
+	}
+
+	mimeview->type = type;
+}
+
+static void mimeview_selected(GtkCTree *ctree, GtkCTreeNode *node, gint column,
+			      MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+
+	if (mimeview->opened == node) return;
+	mimeview->opened = node;
+	gtk_ctree_node_moveto(ctree, node, -1, 0.5, 0);
+
+	partinfo = gtk_ctree_node_get_row_data(ctree, node);
+	if (!partinfo) return;
+
+	/* ungrab the mouse event */
+	if (GTK_WIDGET_HAS_GRAB(ctree)) {
+		gtk_grab_remove(GTK_WIDGET(ctree));
+		if (gdk_pointer_is_grabbed())
+			gdk_pointer_ungrab(GDK_CURRENT_TIME);
+	}
+
+	switch (partinfo->mime_type) {
+	case MIME_TEXT:
+	case MIME_TEXT_HTML:
+	case MIME_MESSAGE_RFC822:
+	case MIME_MULTIPART:
+		mimeview_show_message_part(mimeview, partinfo);
+		break;
+#if (HAVE_GDK_PIXBUF || HAVE_GDK_IMLIB)
+	case MIME_IMAGE:
+		mimeview_show_image_part(mimeview, partinfo);
+		break;
+#endif
+	default:
+		mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
+#if USE_GPGME
+		if (g_strcasecmp(partinfo->content_type,
+				 "application/pgp-signature") == 0)
+			textview_show_signature_part(mimeview->textview,
+						     partinfo);
+		else
+#endif
+			textview_show_mime_part(mimeview->textview, partinfo);
+		break;
+	}
+}
+
+static void mimeview_start_drag(GtkWidget *widget, gint button,
+				GdkEvent *event, MimeView *mimeview)
+{
+	GtkTargetList *list;
+	GdkDragContext *context;
+	MimeInfo *partinfo;
+
+	g_return_if_fail(mimeview != NULL);
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	if (partinfo->filename == NULL && partinfo->name == NULL) return;
+
+	list = gtk_target_list_new(mimeview_mime_types, 1);
+	context = gtk_drag_begin(widget, list,
+				 GDK_ACTION_COPY, button, event);
+	gtk_drag_set_icon_default(context);
+}
+
+static gint mimeview_button_pressed(GtkWidget *widget, GdkEventButton *event,
+				    MimeView *mimeview)
+{
+	GtkCList *clist = GTK_CLIST(widget);
+	MimeInfo *partinfo;
+	gint row, column;
+
+	if (!event) return FALSE;
+
+	if (event->button == 2 || event->button == 3) {
+		if (!gtk_clist_get_selection_info(clist, event->x, event->y,
+						  &row, &column))
+			return FALSE;
+		gtk_clist_unselect_all(clist);
+		gtk_clist_select_row(clist, row, column);
+		gtkut_clist_set_focus_row(clist, row);
+	}
+
+	if (event->button == 2 ||
+	    (event->button == 1 && event->type == GDK_2BUTTON_PRESS)) {
+		/* call external program for image, audio or html */
+		mimeview_launch(mimeview);
+	} else if (event->button == 3) {
+		partinfo = mimeview_get_selected_part(mimeview);
+		if (partinfo && (partinfo->mime_type == MIME_TEXT ||
+				 partinfo->mime_type == MIME_TEXT_HTML ||
+				 partinfo->mime_type == MIME_MESSAGE_RFC822 ||
+				 partinfo->mime_type == MIME_IMAGE ||
+				 partinfo->mime_type == MIME_MULTIPART))
+			menu_set_sensitive(mimeview->popupfactory,
+					   "/Display as text", FALSE);
+		else
+			menu_set_sensitive(mimeview->popupfactory,
+					   "/Display as text", TRUE);
+		if (partinfo &&
+		    partinfo->mime_type == MIME_APPLICATION_OCTET_STREAM)
+			menu_set_sensitive(mimeview->popupfactory,
+					   "/Open", FALSE);
+		else
+			menu_set_sensitive(mimeview->popupfactory,
+					   "/Open", TRUE);
+#if USE_GPGME
+		menu_set_sensitive(mimeview->popupfactory,
+				   "/Check signature",
+				   mimeview_is_signed(mimeview));
+#endif
+
+		gtk_menu_popup(GTK_MENU(mimeview->popupmenu),
+			       NULL, NULL, NULL, NULL,
+			       event->button, event->time);
+	}
+
+#warning FIXME_GTK2 Is it correct?
+	return FALSE;
+}
+
+void mimeview_pass_key_press_event(MimeView *mimeview, GdkEventKey *event)
+{
+	mimeview_key_pressed(mimeview->ctree, event, mimeview);
+}
+
+#define BREAK_ON_MODIFIER_KEY() \
+	if ((event->state & (GDK_MOD1_MASK|GDK_CONTROL_MASK)) != 0) break
+
+#warning FIXME_GTK2
+#if 0
+#define KEY_PRESS_EVENT_STOP() \
+	if (gtk_signal_n_emissions_by_name \
+		(G_OBJECT(ctree), "key_press_event") > 0) { \
+		gtk_signal_emit_stop_by_name(G_OBJECT(ctree), \
+					     "key_press_event"); \
+	}
+#else
+#define KEY_PRESS_EVENT_STOP() \
+	g_signal_stop_emission_by_name(G_OBJECT(ctree), "key_press_event");
+#endif
+
+static gint mimeview_key_pressed(GtkWidget *widget, GdkEventKey *event,
+				 MimeView *mimeview)
+{
+	SummaryView *summaryview;
+	GtkCTree *ctree = GTK_CTREE(widget);
+	GtkCTreeNode *node;
+
+	if (!event) return FALSE;
+	if (!mimeview->opened) return FALSE;
+
+	switch (event->keyval) {
+	case GDK_space:
+		if (textview_scroll_page(mimeview->textview, FALSE))
+			return TRUE;
+
+		node = GTK_CTREE_NODE_NEXT(mimeview->opened);
+		if (node) {
+			gtk_sctree_unselect_all(GTK_SCTREE(ctree));
+			gtk_sctree_select(GTK_SCTREE(ctree), node);
+			return TRUE;
+		}
+		break;
+	case GDK_BackSpace:
+		textview_scroll_page(mimeview->textview, TRUE);
+		return TRUE;
+	case GDK_Return:
+		textview_scroll_one_line(mimeview->textview,
+					 (event->state & GDK_MOD1_MASK) != 0);
+		return TRUE;
+	case GDK_n:
+	case GDK_N:
+		BREAK_ON_MODIFIER_KEY();
+		if (!GTK_CTREE_NODE_NEXT(mimeview->opened)) break;
+		KEY_PRESS_EVENT_STOP();
+
+		g_signal_emit_by_name(G_OBJECT(ctree), "scroll_vertical",
+				      GTK_SCROLL_STEP_FORWARD, 0.0);
+		return TRUE;
+	case GDK_p:
+	case GDK_P:
+		BREAK_ON_MODIFIER_KEY();
+		if (!GTK_CTREE_NODE_PREV(mimeview->opened)) break;
+		KEY_PRESS_EVENT_STOP();
+
+		g_signal_emit_by_name(G_OBJECT(ctree), "scroll_vertical",
+				      GTK_SCROLL_STEP_BACKWARD, 0.0);
+		return TRUE;
+	case GDK_y:
+		BREAK_ON_MODIFIER_KEY();
+		KEY_PRESS_EVENT_STOP();
+		mimeview_save_as(mimeview);
+		return TRUE;
+	case GDK_t:
+		BREAK_ON_MODIFIER_KEY();
+		KEY_PRESS_EVENT_STOP();
+		mimeview_display_as_text(mimeview);
+		return TRUE;
+	case GDK_l:
+		BREAK_ON_MODIFIER_KEY();
+		KEY_PRESS_EVENT_STOP();
+		mimeview_launch(mimeview);
+		return TRUE;
+	default:
+		break;
+	}
+
+	if (!mimeview->messageview->mainwin) return FALSE;
+	summaryview = mimeview->messageview->mainwin->summaryview;
+	summary_pass_key_press_event(summaryview, event);
+	return TRUE;
+}
+
+static void mimeview_drag_data_get(GtkWidget	    *widget,
+				   GdkDragContext   *drag_context,
+				   GtkSelectionData *selection_data,
+				   guint	     info,
+				   guint	     time,
+				   MimeView	    *mimeview)
+{
+	gchar *filename, *uriname;
+	const gchar *bname;
+	MimeInfo *partinfo;
+
+	if (!mimeview->opened) return;
+	if (!mimeview->file) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	if (!partinfo) return;
+	if (!partinfo->filename && !partinfo->name) return;
+
+	filename = partinfo->filename ? partinfo->filename : partinfo->name;
+	bname = g_basename(filename);
+	if (*bname == '\0') return;
+
+	filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
+			       bname, NULL);
+
+	if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
+		alertpanel_error
+			(_("Can't save the part of multipart message."));
+
+	uriname = g_strconcat("file://", filename, NULL);
+	gtk_selection_data_set(selection_data, selection_data->target, 8,
+			       uriname, strlen(uriname));
+
+	g_free(uriname);
+	g_free(filename);
+}
+
+static void mimeview_display_as_text(MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+
+	if (!mimeview->opened) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	g_return_if_fail(partinfo != NULL);
+	mimeview_show_message_part(mimeview, partinfo);
+}
+
+static void mimeview_save_as(MimeView *mimeview)
+{
+	gchar *filename;
+	gchar *defname = NULL;
+	MimeInfo *partinfo;
+
+	if (!mimeview->opened) return;
+	if (!mimeview->file) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	g_return_if_fail(partinfo != NULL);
+
+	if (partinfo->filename)
+		defname = partinfo->filename;
+	else if (partinfo->name) {
+		Xstrdup_a(defname, partinfo->name, return);
+		subst_for_filename(defname);
+	}
+
+	filename = filesel_select_file(_("Save as"), defname);
+	if (!filename) return;
+	if (is_file_exist(filename)) {
+		AlertValue aval;
+
+		aval = alertpanel(_("Overwrite"),
+				  _("Overwrite existing file?"),
+				  _("OK"), _("Cancel"), NULL);
+		if (G_ALERTDEFAULT != aval) return;
+	}
+
+	if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
+		alertpanel_error
+			(_("Can't save the part of multipart message."));
+}
+
+static void mimeview_launch(MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+	gchar *filename;
+
+	if (!mimeview->opened) return;
+	if (!mimeview->file) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	g_return_if_fail(partinfo != NULL);
+
+	filename = procmime_get_tmp_file_name(partinfo);
+
+	if (procmime_get_part(filename, mimeview->file, partinfo) < 0)
+		alertpanel_error
+			(_("Can't save the part of multipart message."));
+	else
+		mimeview_view_file(filename, partinfo, NULL);
+
+	g_free(filename);
+}
+
+static void mimeview_open_with(MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+	gchar *filename;
+	gchar *cmd;
+
+	if (!mimeview->opened) return;
+	if (!mimeview->file) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	g_return_if_fail(partinfo != NULL);
+
+	filename = procmime_get_tmp_file_name(partinfo);
+
+	if (procmime_get_part(filename, mimeview->file, partinfo) < 0) {
+		alertpanel_error
+			(_("Can't save the part of multipart message."));
+		g_free(filename);
+		return;
+	}
+
+	if (!prefs_common.mime_open_cmd_history)
+		prefs_common.mime_open_cmd_history =
+			add_history(NULL, prefs_common.mime_open_cmd);
+
+	cmd = input_dialog_combo
+		(_("Open with"),
+		 _("Enter the command line to open file:\n"
+		   "(`%s' will be replaced with file name)"),
+		 prefs_common.mime_open_cmd,
+		 prefs_common.mime_open_cmd_history,
+		 TRUE);
+	if (cmd) {
+		mimeview_view_file(filename, partinfo, cmd);
+		g_free(prefs_common.mime_open_cmd);
+		prefs_common.mime_open_cmd = cmd;
+		prefs_common.mime_open_cmd_history =
+			add_history(prefs_common.mime_open_cmd_history, cmd);
+	}
+
+	g_free(filename);
+}
+
+static void mimeview_view_file(const gchar *filename, MimeInfo *partinfo,
+			       const gchar *cmdline)
+{
+	static gchar *default_image_cmdline = "display '%s'";
+	static gchar *default_audio_cmdline = "play '%s'";
+	static gchar *default_html_cmdline = DEFAULT_BROWSER_CMD;
+	static gchar *mime_cmdline = "metamail -d -b -x -c %s '%s'";
+	gchar buf[1024];
+	gchar m_buf[1024];
+	const gchar *cmd;
+	const gchar *def_cmd;
+	const gchar *p;
+
+	if (cmdline) {
+		cmd = cmdline;
+		def_cmd = NULL;
+	} else if (MIME_APPLICATION_OCTET_STREAM == partinfo->mime_type) {
+		return;
+	} else if (MIME_IMAGE == partinfo->mime_type) {
+		cmd = prefs_common.mime_image_viewer;
+		def_cmd = default_image_cmdline;
+	} else if (MIME_AUDIO == partinfo->mime_type) {
+		cmd = prefs_common.mime_audio_player;
+		def_cmd = default_audio_cmdline;
+	} else if (MIME_TEXT_HTML == partinfo->mime_type) {
+		cmd = prefs_common.uri_cmd;
+		def_cmd = default_html_cmdline;
+	} else {
+		g_snprintf(m_buf, sizeof(m_buf), mime_cmdline,
+			   partinfo->content_type, "%s");
+		cmd = m_buf;
+		def_cmd = NULL;
+	}
+
+	if (cmd && (p = strchr(cmd, '%')) && *(p + 1) == 's' &&
+	    !strchr(p + 2, '%'))
+		g_snprintf(buf, sizeof(buf), cmd, filename);
+	else {
+		if (cmd)
+			g_warning(_("MIME viewer command line is invalid: `%s'"), cmd);
+		if (def_cmd)
+			g_snprintf(buf, sizeof(buf), def_cmd, filename);
+		else
+			return;
+	}
+
+	execute_command_line(buf, TRUE);
+}
+
+#if USE_GPGME
+static void update_node_name(GtkCTree *ctree, GtkCTreeNode *node,
+			     gpointer data)
+{
+	MimeInfo *partinfo;
+	gchar *part_name;
+
+	partinfo = gtk_ctree_node_get_row_data(ctree, node);
+	g_return_if_fail(partinfo != NULL);
+
+	part_name = get_part_name(partinfo);
+	gtk_ctree_node_set_text(ctree, node, COL_NAME, part_name);
+}
+
+static void mimeview_update_names(MimeView *mimeview)
+{
+	GtkCTree *ctree = GTK_CTREE(mimeview->ctree);
+
+	gtk_ctree_pre_recursive(ctree, NULL, update_node_name, NULL);
+}
+
+static void mimeview_update_signature_info(MimeView *mimeview)
+{
+	MimeInfo *partinfo;
+
+	if (!mimeview) return;
+	if (!mimeview->opened) return;
+
+	partinfo = mimeview_get_selected_part(mimeview);
+	if (!partinfo) return;
+
+	if (g_strcasecmp(partinfo->content_type,
+			 "application/pgp-signature") == 0) {
+		mimeview_change_view_type(mimeview, MIMEVIEW_TEXT);
+		textview_show_signature_part(mimeview->textview, partinfo);
+	}
+}
+
+static void mimeview_check_signature(MimeView *mimeview)
+{
+	MimeInfo *mimeinfo;
+	FILE *fp;
+
+	g_return_if_fail (mimeview_is_signed(mimeview));
+
+	mimeinfo = mimeview_get_selected_part(mimeview);
+	g_return_if_fail(mimeinfo != NULL);
+	g_return_if_fail(mimeview->file != NULL);
+
+	while (mimeinfo->parent)
+		mimeinfo = mimeinfo->parent;
+
+	if ((fp = fopen(mimeview->file, "rb")) == NULL) {
+		FILE_OP_ERROR(mimeview->file, "fopen");
+		return;
+	}
+
+	rfc2015_check_signature(mimeinfo, fp);
+	fclose(fp);
+
+	mimeview_update_names(mimeview);
+	mimeview_update_signature_info(mimeview);
+
+	textview_show_message(mimeview->messageview->textview, mimeinfo,
+			      mimeview->file);
+}
+#endif /* USE_GPGME */