claws-mail/src/summary_search.c

/*
 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
 * Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Claws Mail team
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include "defs.h"

#include <glib.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtktable.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkentry.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkcheckbutton.h>
#include <gtk/gtkhbbox.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkctree.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "main.h"
#include "summary_search.h"
#include "summaryview.h"
#include "messageview.h"
#include "mainwindow.h"
#include "menu.h"
#include "utils.h"
#include "gtkutils.h"
#include "prefs_gtk.h"
#include "manage_window.h"
#include "alertpanel.h"
#include "matcher.h"
#include "matcher_parser.h"
#include "prefs_matcher.h"
#include "manual.h"

static struct SummarySearchWindow {
	GtkWidget *window;

	GtkWidget *bool_optmenu;

	GtkWidget *from_entry;
	GtkWidget *to_entry;
	GtkWidget *subject_entry;
	GtkWidget *body_entry;

	GtkWidget *adv_condition_entry;
	GtkWidget *adv_condition_btn;
	GtkWidget *adv_search_checkbtn;

	GtkWidget *case_checkbtn;

	GtkWidget *clear_btn;
	GtkWidget *help_btn;
	GtkWidget *all_btn;
	GtkWidget *prev_btn;
	GtkWidget *next_btn;
	GtkWidget *close_btn;
	GtkWidget *stop_btn;

	SummaryView *summaryview;

	MatcherList			*matcher_list;

	gboolean is_searching;
} search_window;

static void summary_search_create	(void);

static void summary_search_execute	(gboolean	 backward,
					 gboolean	 search_all);

static void summary_search_clear	(GtkButton	*button,
					 gpointer	 data);
static void summary_search_prev_clicked	(GtkButton	*button,
					 gpointer	 data);
static void summary_search_next_clicked	(GtkButton	*button,
					 gpointer	 data);
static void summary_search_all_clicked	(GtkButton	*button,
					 gpointer	 data);
static void summary_search_stop_clicked	(GtkButton	*button,
					 gpointer	 data);
static void adv_condition_btn_clicked	(GtkButton	*button,
					 gpointer	 data);

static void from_activated		(void);
static void to_activated		(void);
static void subject_activated		(void);
static void body_activated		(void);
static void adv_condition_activated	(void);

static gboolean key_pressed		(GtkWidget	*widget,
					 GdkEventKey	*event,
					 gpointer	 data);


#define GTK_BUTTON_SET_SENSITIVE(widget,sensitive) {	\
	gboolean in_btn = FALSE;							\
	if (GTK_IS_BUTTON(widget))							\
		in_btn = GTK_BUTTON(widget)->in_button;			\
	gtk_widget_set_sensitive(widget, sensitive);		\
	if (GTK_IS_BUTTON(widget))							\
		GTK_BUTTON(widget)->in_button = in_btn;			\
}

void summary_search(SummaryView *summaryview)
{
	if (!search_window.window) {
		summary_search_create();
	} else {
		gtk_widget_hide(search_window.window);
	}

	search_window.summaryview = summaryview;

	gtk_widget_grab_focus(search_window.next_btn);
	gtk_widget_grab_focus(search_window.subject_entry);
	gtk_widget_show(search_window.window);
}

static void summary_show_stop_button(void)
{
	gtk_widget_hide(search_window.close_btn);
	gtk_widget_show(search_window.stop_btn);
	GTK_BUTTON_SET_SENSITIVE(search_window.all_btn, FALSE)
	GTK_BUTTON_SET_SENSITIVE(search_window.prev_btn, FALSE)
	GTK_BUTTON_SET_SENSITIVE(search_window.next_btn, FALSE)
}

static void summary_hide_stop_button(void)
{
	gtk_widget_hide(search_window.stop_btn);
	gtk_widget_show(search_window.close_btn);
	gtk_widget_set_sensitive(search_window.all_btn, TRUE);
	gtk_widget_set_sensitive(search_window.prev_btn, TRUE);
	gtk_widget_set_sensitive(search_window.next_btn, TRUE);
}

static void summary_search_create(void)
{
	GtkWidget *window;
	GtkWidget *vbox1;
	GtkWidget *bool_hbox;
	GtkWidget *bool_optmenu;
	GtkWidget *bool_menu;
	GtkWidget *menuitem;
	GtkWidget *clear_btn;

	GtkWidget *table1;
	GtkWidget *from_label;
	GtkWidget *from_entry;
	GtkWidget *to_label;
	GtkWidget *to_entry;
	GtkWidget *subject_label;
	GtkWidget *subject_entry;
	GtkWidget *body_label;
	GtkWidget *body_entry;
	GtkWidget *adv_condition_label;
	GtkWidget *adv_condition_entry;
	GtkWidget *adv_condition_btn;

	GtkWidget *checkbtn_hbox;
	GtkWidget *adv_search_checkbtn;
	GtkWidget *case_checkbtn;

	GtkWidget *confirm_area;
	GtkWidget *help_btn;
	GtkWidget *all_btn;
	GtkWidget *prev_btn;
	GtkWidget *next_btn;
	GtkWidget *close_btn;
	GtkWidget *stop_btn;
	GtkTooltips *tooltip;

	gboolean is_searching = FALSE;

	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_title(GTK_WINDOW (window), _("Search messages"));
	gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
	gtk_container_set_border_width(GTK_CONTAINER (window), 8);
	g_signal_connect(G_OBJECT(window), "delete_event",
			 G_CALLBACK(gtk_widget_hide_on_delete), NULL);
	g_signal_connect(G_OBJECT(window), "key_press_event",
			 G_CALLBACK(key_pressed), NULL);
	MANAGE_WINDOW_SIGNALS_CONNECT(window);

	vbox1 = gtk_vbox_new (FALSE, 0);
	gtk_widget_show (vbox1);
	gtk_container_add (GTK_CONTAINER (window), vbox1);

	bool_hbox = gtk_hbox_new(FALSE, 4);
	gtk_widget_show(bool_hbox);
	gtk_box_pack_start(GTK_BOX(vbox1), bool_hbox, FALSE, FALSE, 0);

	bool_optmenu = gtk_option_menu_new();
	gtk_widget_show(bool_optmenu);
	gtk_box_pack_start(GTK_BOX(bool_hbox), bool_optmenu, FALSE, FALSE, 0);

	bool_menu = gtk_menu_new();
	MENUITEM_ADD(bool_menu, menuitem, _("Match any of the following"), 0);
	MENUITEM_ADD(bool_menu, menuitem, _("Match all of the following"), 1);
	gtk_option_menu_set_menu(GTK_OPTION_MENU(bool_optmenu), bool_menu);

	clear_btn = gtk_button_new_from_stock(GTK_STOCK_CLEAR);
	gtk_widget_show(clear_btn);
	gtk_box_pack_end(GTK_BOX(bool_hbox), clear_btn, FALSE, FALSE, 0);

	table1 = gtk_table_new (5, 3, FALSE);
	gtk_widget_show (table1);
	gtk_box_pack_start (GTK_BOX (vbox1), table1, TRUE, TRUE, 0);
	gtk_container_set_border_width (GTK_CONTAINER (table1), 4);
	gtk_table_set_row_spacings (GTK_TABLE (table1), 8);
	gtk_table_set_col_spacings (GTK_TABLE (table1), 8);

	from_entry = gtk_entry_new ();
	gtk_widget_show (from_entry);
	gtk_table_attach (GTK_TABLE (table1), from_entry, 1, 3, 0, 1,
			  GTK_EXPAND|GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT(from_entry), "activate",
			 G_CALLBACK(from_activated), NULL);

	to_entry = gtk_entry_new ();
	gtk_widget_show (to_entry);
	gtk_table_attach (GTK_TABLE (table1), to_entry, 1, 3, 1, 2,
			  GTK_EXPAND|GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT(to_entry), "activate",
			 G_CALLBACK(to_activated), NULL);

	subject_entry = gtk_entry_new ();
	gtk_widget_show (subject_entry);
	gtk_table_attach (GTK_TABLE (table1), subject_entry, 1, 3, 2, 3,
			  GTK_EXPAND|GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT(subject_entry), "activate",
			 G_CALLBACK(subject_activated), NULL);

	body_entry = gtk_entry_new ();
	gtk_widget_show (body_entry);
	gtk_table_attach (GTK_TABLE (table1), body_entry, 1, 3, 3, 4,
			  GTK_EXPAND|GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT(body_entry), "activate",
			 G_CALLBACK(body_activated), NULL);

	adv_condition_entry = gtk_entry_new ();
	gtk_widget_show (adv_condition_entry);
	gtk_table_attach (GTK_TABLE (table1), adv_condition_entry, 1, 2, 4, 5,
			  GTK_EXPAND|GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT(adv_condition_entry), "activate",
			 G_CALLBACK(adv_condition_activated), NULL);

	adv_condition_btn = gtk_button_new_with_label(" ... ");
	gtk_widget_show (adv_condition_btn);
	gtk_table_attach (GTK_TABLE (table1), adv_condition_btn, 2, 3, 4, 5,
			  GTK_FILL, 0, 0, 0);
	g_signal_connect(G_OBJECT (adv_condition_btn), "clicked",
			 G_CALLBACK(adv_condition_btn_clicked), search_window.window);
	tooltip = gtk_tooltips_new();
	gtk_tooltips_set_tip(GTK_TOOLTIPS(tooltip), adv_condition_btn,
			     _("Edit search criteria"), NULL);

	from_label = gtk_label_new (_("From:"));
	gtk_widget_show (from_label);
	gtk_table_attach (GTK_TABLE (table1), from_label, 0, 1, 0, 1,
			  GTK_FILL, 0, 0, 0);
	gtk_label_set_justify (GTK_LABEL (from_label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment (GTK_MISC (from_label), 1, 0.5);

	to_label = gtk_label_new (_("To:"));
	gtk_widget_show (to_label);
	gtk_table_attach (GTK_TABLE (table1), to_label, 0, 1, 1, 2,
			  GTK_FILL, 0, 0, 0);
	gtk_label_set_justify (GTK_LABEL (to_label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment (GTK_MISC (to_label), 1, 0.5);

	subject_label = gtk_label_new (_("Subject:"));
	gtk_widget_show (subject_label);
	gtk_table_attach (GTK_TABLE (table1), subject_label, 0, 1, 2, 3,
			  GTK_FILL, 0, 0, 0);
	gtk_label_set_justify (GTK_LABEL (subject_label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment (GTK_MISC (subject_label), 1, 0.5);

	body_label = gtk_label_new (_("Body:"));
	gtk_widget_show (body_label);
	gtk_table_attach (GTK_TABLE (table1), body_label, 0, 1, 3, 4,
			  GTK_FILL, 0, 0, 0);
	gtk_label_set_justify (GTK_LABEL (body_label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment (GTK_MISC (body_label), 1, 0.5);

	adv_condition_label = gtk_label_new (_("Condition:"));
	gtk_widget_show (adv_condition_label);
	gtk_table_attach (GTK_TABLE (table1), adv_condition_label, 0, 1, 4, 5,
			  GTK_FILL, 0, 0, 0);
	gtk_label_set_justify (GTK_LABEL (adv_condition_label), GTK_JUSTIFY_RIGHT);
	gtk_misc_set_alignment (GTK_MISC (adv_condition_label), 1, 0.5);

	checkbtn_hbox = gtk_hbox_new (FALSE, 8);
	gtk_widget_show (checkbtn_hbox);
	gtk_box_pack_start (GTK_BOX (vbox1), checkbtn_hbox, TRUE, TRUE, 0);
	gtk_container_set_border_width (GTK_CONTAINER (checkbtn_hbox), 8);

	case_checkbtn = gtk_check_button_new_with_label (_("Case sensitive"));
	gtk_widget_show (case_checkbtn);
	gtk_box_pack_start (GTK_BOX (checkbtn_hbox), case_checkbtn,
			    FALSE, FALSE, 0);

	adv_search_checkbtn = gtk_check_button_new_with_label (_("Extended Search"));
	gtk_widget_show (adv_search_checkbtn);
	gtk_box_pack_start (GTK_BOX (checkbtn_hbox), adv_search_checkbtn,
			    FALSE, FALSE, 0);

	confirm_area = gtk_hbutton_box_new();
	gtk_widget_show (confirm_area);
	gtk_button_box_set_layout(GTK_BUTTON_BOX(confirm_area),
				  GTK_BUTTONBOX_END);
	gtk_box_set_spacing(GTK_BOX(confirm_area), 5);

	gtkut_stock_button_add_help(confirm_area, &help_btn);

	all_btn = gtk_button_new_with_mnemonic(_("Find _all"));
	GTK_WIDGET_SET_FLAGS(all_btn, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(confirm_area), all_btn, TRUE, TRUE, 0);
	gtk_widget_show(all_btn);

	prev_btn = gtk_button_new_from_stock(GTK_STOCK_GO_BACK);
	GTK_WIDGET_SET_FLAGS(prev_btn, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(confirm_area), prev_btn, TRUE, TRUE, 0);
	gtk_widget_show(prev_btn);

	next_btn = gtk_button_new_from_stock(GTK_STOCK_GO_FORWARD);
	GTK_WIDGET_SET_FLAGS(next_btn, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(confirm_area), next_btn, TRUE, TRUE, 0);
	gtk_widget_show(next_btn);

	close_btn = gtk_button_new_from_stock(GTK_STOCK_CLOSE);
	GTK_WIDGET_SET_FLAGS(close_btn, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(confirm_area), close_btn, TRUE, TRUE, 0);
	gtk_widget_show(close_btn);

	/* stop button hidden */
	stop_btn = gtk_button_new_from_stock(GTK_STOCK_STOP);
	GTK_WIDGET_SET_FLAGS(stop_btn, GTK_CAN_DEFAULT);
	gtk_box_pack_start(GTK_BOX(confirm_area), stop_btn, TRUE, TRUE, 0);

	gtk_box_pack_start (GTK_BOX (vbox1), confirm_area, FALSE, FALSE, 0);
	gtk_widget_grab_default(next_btn);

	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, bool_menu)
	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, from_entry)
	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, to_entry)
	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, subject_entry)
	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, body_entry)
	SET_TOGGLE_SENSITIVITY(adv_search_checkbtn, adv_condition_label)
	SET_TOGGLE_SENSITIVITY(adv_search_checkbtn, adv_condition_entry)
	SET_TOGGLE_SENSITIVITY(adv_search_checkbtn, adv_condition_btn)
	SET_TOGGLE_SENSITIVITY_REVERSE(adv_search_checkbtn, case_checkbtn)

	g_signal_connect(G_OBJECT(help_btn), "clicked",
			 G_CALLBACK(manual_open_with_anchor_cb),
			 MANUAL_ANCHOR_SEARCHING);
	g_signal_connect(G_OBJECT(clear_btn), "clicked",
			 G_CALLBACK(summary_search_clear), NULL);
	g_signal_connect(G_OBJECT(all_btn), "clicked",
			 G_CALLBACK(summary_search_all_clicked), NULL);
	g_signal_connect(G_OBJECT(prev_btn), "clicked",
			 G_CALLBACK(summary_search_prev_clicked), NULL);
	g_signal_connect(G_OBJECT(next_btn), "clicked",
			 G_CALLBACK(summary_search_next_clicked), NULL);
	g_signal_connect_closure
		(G_OBJECT(close_btn), "clicked",
		 g_cclosure_new_swap(G_CALLBACK(gtk_widget_hide),
	     window, NULL), FALSE);
	g_signal_connect(G_OBJECT(stop_btn), "clicked",
			 G_CALLBACK(summary_search_stop_clicked), NULL);

	search_window.window = window;
	search_window.bool_optmenu = bool_optmenu;
	search_window.from_entry = from_entry;
	search_window.to_entry = to_entry;
	search_window.subject_entry = subject_entry;
	search_window.body_entry = body_entry;
	search_window.adv_condition_entry = adv_condition_entry;
	search_window.adv_condition_btn = adv_condition_btn;
	search_window.case_checkbtn = case_checkbtn;
	search_window.adv_search_checkbtn = adv_search_checkbtn;
	search_window.clear_btn = clear_btn;
	search_window.help_btn = help_btn;
	search_window.all_btn = all_btn;
	search_window.prev_btn = prev_btn;
	search_window.next_btn = next_btn;
	search_window.close_btn = close_btn;
	search_window.stop_btn = stop_btn;
	search_window.matcher_list = NULL;
	search_window.is_searching = is_searching;
}

static void summary_search_execute(gboolean backward, gboolean search_all)
{
	SummaryView *summaryview = search_window.summaryview;
	GtkCTree *ctree = GTK_CTREE(summaryview->ctree);
	GtkCTreeNode *node;
	MsgInfo *msginfo;
	gboolean adv_search;
	gboolean bool_and = FALSE;
	gboolean case_sens = FALSE;
	gboolean all_searched = FALSE;
	gboolean matched = FALSE;
	gboolean body_matched = FALSE;
	const gchar *from_str = NULL, *to_str = NULL, *subject_str = NULL;
	const gchar *body_str = NULL, *adv_condition = NULL;
	StrFindFunc str_find_func = NULL;
	gboolean is_fast = TRUE;
	gint interval = 1000;
	gint i = 0;

	if (summary_is_locked(summaryview)) {
		return;
	}
	summary_lock(summaryview);

	adv_search = gtk_toggle_button_get_active
		(GTK_TOGGLE_BUTTON(search_window.adv_search_checkbtn));

	if (adv_search) {
		if (search_window.matcher_list != NULL) {
			matcherlist_free(search_window.matcher_list);
			search_window.matcher_list = NULL;
		}
		adv_condition = gtk_entry_get_text(GTK_ENTRY(search_window.adv_condition_entry));
		if (adv_condition[0] != '\0') {
			search_window.matcher_list = matcher_parser_get_cond((gchar*)adv_condition, &is_fast);
			if (!is_fast)
				interval = 100;
			/* TODO: check for condition parsing error and show an error dialog */
		} else {
			/* TODO: warn if no search condition? (or make buttons enabled only when
				at least one search condition has been set */
			summary_unlock(summaryview);
			return;
		}
	} else {
		bool_and = GPOINTER_TO_INT
			(menu_get_option_menu_active_user_data
				(GTK_OPTION_MENU(search_window.bool_optmenu)));
		case_sens = gtk_toggle_button_get_active
			(GTK_TOGGLE_BUTTON(search_window.case_checkbtn));

		if (case_sens) {
			str_find_func = str_find;
		} else {
			str_find_func = str_case_find;
		}

		from_str    = gtk_entry_get_text(GTK_ENTRY(search_window.from_entry));
		to_str      = gtk_entry_get_text(GTK_ENTRY(search_window.to_entry));
		subject_str = gtk_entry_get_text(GTK_ENTRY(search_window.subject_entry));
		body_str    = gtk_entry_get_text(GTK_ENTRY(search_window.body_entry));

		if (	(from_str[0] == '\0') &&
				(to_str[0] == '\0') &&
				(subject_str[0] == '\0') &&
				(body_str[0] == '\0')) {
			/* TODO: warn if no search criteria? (or make buttons enabled only when
				at least one search criteria has been set */
			summary_unlock(summaryview);
			return;
		}
	}

	search_window.is_searching = TRUE;
	main_window_cursor_wait(summaryview->mainwin);
	summary_show_stop_button();

	if (search_all) {
		summary_freeze(summaryview);
		summary_unselect_all(summaryview);
		node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
		backward = FALSE;
	} else if (!summaryview->selected) {
		if (backward) {
			node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list_end);
		} else {
			node = GTK_CTREE_NODE(GTK_CLIST(ctree)->row_list);
		}

		if (!node) {
			search_window.is_searching = FALSE;
			summary_hide_stop_button();
			main_window_cursor_normal(summaryview->mainwin);
			summary_unlock(summaryview);
			return;
		}
	} else {
		if (backward) {
			node = gtkut_ctree_node_prev
				(ctree, summaryview->selected);
		} else {
			node = gtkut_ctree_node_next
				(ctree, summaryview->selected);
		}
	}

	for (; search_window.is_searching; i++) {
		if (!node) {
			gchar *str;
			AlertValue val;

			if (search_all) {
				break;
			}

			if (all_searched) {
				alertpanel_full(_("Search failed"),
						_("Search string not found."),
				 		GTK_STOCK_CLOSE, NULL, NULL, FALSE,
				 		NULL, ALERT_WARNING, G_ALERTDEFAULT);
				break;
			}

			if (backward)
				str = _("Beginning of list reached; continue from end?");
			else
				str = _("End of list reached; continue from beginning?");

			val = alertpanel(_("Search finished"), str,
					 GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
			if (G_ALERTALTERNATE == val) {
				if (backward) {
					node = GTK_CTREE_NODE
						(GTK_CLIST(ctree)->row_list_end);
				} else {
					node = GTK_CTREE_NODE
						(GTK_CLIST(ctree)->row_list);
				}

				all_searched = TRUE;

				manage_window_focus_in(search_window.window, NULL, NULL);
			} else {
				break;
			}
		}

		msginfo = gtk_ctree_node_get_row_data(ctree, node);
		body_matched = FALSE;

		if (adv_search) {
			matched = matcherlist_match(search_window.matcher_list, msginfo);
		} else {
			if (bool_and) {
				matched = TRUE;
				if (*from_str) {
					if (!msginfo->from ||
				    	!str_find_func(msginfo->from, from_str)) {
						matched = FALSE;
					}
				}
				if (matched && *to_str) {
					if (!msginfo->to ||
				    	!str_find_func(msginfo->to, to_str)) {
						matched = FALSE;
					}
				}
				if (matched && *subject_str) {
					if (!msginfo->subject ||
				    	!str_find_func(msginfo->subject, subject_str)) {
						matched = FALSE;
					}
				}
				if (matched && *body_str) {
					if (procmime_find_string(msginfo, body_str,
								 str_find_func)) {
						body_matched = TRUE;
					} else {
						matched = FALSE;
					}
				}
				if (matched && !*from_str && !*to_str &&
			    	!*subject_str && !*body_str) {
					matched = FALSE;
				}
			} else {
				matched = FALSE;
				if (*from_str && msginfo->from) {
					if (str_find_func(msginfo->from, from_str)) {
						matched = TRUE;
					}
				}
				if (!matched && *to_str && msginfo->to) {
					if (str_find_func(msginfo->to, to_str)) {
						matched = TRUE;
					}
				}
				if (!matched && *subject_str && msginfo->subject) {
					if (str_find_func(msginfo->subject, subject_str)) {
						matched = TRUE;
					}
				}
				if (!matched && *body_str) {
					if (procmime_find_string(msginfo, body_str,
								 str_find_func)) {
						matched = TRUE;
						body_matched = TRUE;
					}
				}
			}
		}

		if (matched) {
			if (search_all) {
				gtk_ctree_select(ctree, node);
			} else {
				if (messageview_is_visible
					(summaryview->messageview)) {
					summary_unlock(summaryview);
					summary_select_node
						(summaryview, node, TRUE, TRUE);
					summary_lock(summaryview);
					if (body_matched) {
						messageview_search_string
							(summaryview->messageview,
							 body_str, case_sens);
					}
				} else {
					summary_select_node
						(summaryview, node, FALSE, TRUE);
				}
				break;
			}
		}

		node = backward ? gtkut_ctree_node_prev(ctree, node)
				: gtkut_ctree_node_next(ctree, node);
		if (i % interval == 0)
			GTK_EVENTS_FLUSH();
	}

	search_window.is_searching = FALSE;
	summary_hide_stop_button();
	main_window_cursor_normal(summaryview->mainwin);
	if (search_all) {
		summary_thaw(summaryview);
	}
	summary_unlock(summaryview);
}

static void summary_search_clear(GtkButton *button, gpointer data)
{
	if (gtk_toggle_button_get_active
		(GTK_TOGGLE_BUTTON(search_window.adv_search_checkbtn))) {
		gtk_editable_delete_text(GTK_EDITABLE(search_window.adv_condition_entry),
					 0, -1);
	} else {
		gtk_editable_delete_text(GTK_EDITABLE(search_window.from_entry),
					 0, -1);
		gtk_editable_delete_text(GTK_EDITABLE(search_window.to_entry),
					 0, -1);
		gtk_editable_delete_text(GTK_EDITABLE(search_window.subject_entry),
					 0, -1);
		gtk_editable_delete_text(GTK_EDITABLE(search_window.body_entry),
					 0, -1);
	}
	/* stop searching */
	if (search_window.is_searching) {
		search_window.is_searching = FALSE;
	}
}

static void summary_search_prev_clicked(GtkButton *button, gpointer data)
{
	summary_search_execute(TRUE, FALSE);
}

static void summary_search_next_clicked(GtkButton *button, gpointer data)
{
	summary_search_execute(FALSE, FALSE);
}

static void summary_search_all_clicked(GtkButton *button, gpointer data)
{
	summary_search_execute(FALSE, TRUE);
}

static void adv_condition_btn_done(MatcherList * matchers)
{
	gchar *str;

	g_return_if_fail(
			mainwindow_get_mainwindow()->summaryview->quicksearch != NULL);

	if (matchers == NULL) {
		return;
	}

	str = matcherlist_to_string(matchers);

	if (str != NULL) {
		gtk_entry_set_text(
			GTK_ENTRY(search_window.adv_condition_entry), str);
		g_free(str);
	}
}

static void summary_search_stop_clicked(GtkButton *button, gpointer data)
{
	search_window.is_searching = FALSE;
}

static void adv_condition_btn_clicked(GtkButton *button, gpointer data)
{
	const gchar * cond_str;
	MatcherList * matchers = NULL;

	g_return_if_fail( search_window.window != NULL );

	/* re-use it the current quicksearch value if it's a condition expression,
	   otherwise ignore it silently */
	cond_str = gtk_entry_get_text(
			GTK_ENTRY(search_window.adv_condition_entry));
	if (*cond_str != '\0') {
		matchers = matcher_parser_get_cond((gchar*)cond_str, NULL);
	}

	prefs_matcher_open(matchers, adv_condition_btn_done);

	if (matchers != NULL) {
		matcherlist_free(matchers);
	}
};

static void from_activated(void)
{
	gtk_widget_grab_focus(search_window.to_entry);
}

static void to_activated(void)
{
	gtk_widget_grab_focus(search_window.subject_entry);
}

static void subject_activated(void)
{
	gtk_button_clicked(GTK_BUTTON(search_window.next_btn));
}

static void body_activated(void)
{
	gtk_button_clicked(GTK_BUTTON(search_window.next_btn));
}

static void adv_condition_activated(void)
{
	gtk_button_clicked(GTK_BUTTON(search_window.next_btn));
}

static gboolean key_pressed(GtkWidget *widget, GdkEventKey *event,
			    gpointer data)
{
	if (event && event->keyval == GDK_Escape) {
		/* ESC key will:
			- stop a running search
			- close the search window if no search is running
		*/
		if (!search_window.is_searching) {
			gtk_widget_hide(search_window.window);
		} else {
			search_window.is_searching = FALSE;
		}
	}
	return FALSE;
}