/*
 *  Copyright (C) 2002 Jorn Baayen
 *
 *  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, 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.
 *
 *  $Id$
 */

#include "find-dialog.h"
#include "ephy-prefs.h"
#include "ephy-embed.h"
#include "ephy-debug.h"

#include <gtk/gtk.h>

#define CONF_FIND_MATCH_CASE "/apps/epiphany/dialogs/find_match_case"
#define CONF_FIND_AUTOWRAP "/apps/epiphany/dialogs/find_autowrap"
#define CONF_FIND_WORD "/apps/epiphany/dialogs/find_word"

static void find_dialog_class_init (FindDialogClass *klass);
static void find_dialog_init (FindDialog *dialog);
static void find_dialog_finalize (GObject *object);

static void
impl_construct (EphyDialog *dialog,
                const EphyDialogProperty *properties,
                const char *file,
                const char *name);
static void
impl_destruct (EphyDialog *dialog);
static void
impl_show (EphyDialog *dialog);
static void
find_get_info (EphyDialog *dialog);

/* Glade callbacks */
void find_close_button_clicked_cb (GtkWidget *button, EphyDialog *dialog);
void find_next_button_clicked_cb (GtkWidget *button, EphyDialog *dialog);
void find_prev_button_clicked_cb (GtkWidget *button, EphyDialog *dialog);
void find_entry_changed_cb  (GtkWidget *editable, EphyDialog *dialog);
void find_check_toggled_cb (GtkWidget *toggle, EphyDialog *dialog);

static GObjectClass *parent_class = NULL;

struct FindDialogPrivate
{
	EmbedFindInfo *properties;
	GtkWidget *window;
	gboolean constructed;
	FindNavigationFlags nav_flags;
	EphyEmbed *old_embed;
};

enum
{
	WINDOW_PROP,
	MATCH_CASE_PROP,
	AUTOWRAP_PROP,
	WORD_PROP,
	BACK_BUTTON,
	FORWARD_BUTTON
};

static const
EphyDialogProperty properties [] =
{
	{ WINDOW_PROP, "find_dialog", NULL, PT_NORMAL, NULL },
	{ MATCH_CASE_PROP, "case_check", CONF_FIND_MATCH_CASE, PT_NORMAL, NULL },
	{ AUTOWRAP_PROP, "wrap_check", CONF_FIND_AUTOWRAP, PT_NORMAL, NULL },
	{ WORD_PROP, "find_entry", CONF_FIND_WORD, PT_NORMAL, NULL },
	{ BACK_BUTTON, "back_button", NULL, PT_NORMAL, NULL },
	{ FORWARD_BUTTON, "forward_button", NULL, PT_NORMAL, NULL },
	{ -1, NULL, NULL }
};

enum
{
	PROP_0,
	PROP_NAVIGATION
};

GType
find_dialog_get_type (void)
{
        static GType find_dialog_type = 0;

        if (find_dialog_type == 0)
        {
                static const GTypeInfo our_info =
                {
                        sizeof (FindDialogClass),
                        NULL, /* base_init */
                        NULL, /* base_finalize */
                        (GClassInitFunc) find_dialog_class_init,
                        NULL,
                        NULL, /* class_data */
                        sizeof (FindDialog),
                        0, /* n_preallocs */
                        (GInstanceInitFunc) find_dialog_init
                };

                find_dialog_type = g_type_register_static (EPHY_EMBED_DIALOG_TYPE,
						           "FindDialog",
						           &our_info, 0);
        }

        return find_dialog_type;

}

static void
set_navigation_flags (FindDialog *dialog, FindNavigationFlags flags)
{
	GtkWidget *forward_button;
	GtkWidget *back_button;
	gboolean can_go_prev = FALSE, can_go_next = FALSE;

	if (!dialog->priv->constructed) return;

	dialog->priv->nav_flags = flags;

	if (flags & FIND_CAN_GO_PREV)
	{
		can_go_prev = TRUE;
	}
	if (flags & FIND_CAN_GO_NEXT)
	{
		can_go_next = TRUE;
	}

	back_button = ephy_dialog_get_control (EPHY_DIALOG (dialog), BACK_BUTTON);
	gtk_widget_set_sensitive (back_button, can_go_prev);

	forward_button = ephy_dialog_get_control (EPHY_DIALOG (dialog), FORWARD_BUTTON);
	gtk_widget_set_sensitive (forward_button, can_go_next);

	g_object_notify (G_OBJECT (dialog), "navigation");
}

static void
ephy_find_dialog_get_property (GObject *object,
			       guint prop_id,
			       GValue *value,
			       GParamSpec *pspec)
{
	FindDialog *dialog = FIND_DIALOG (object);

	switch (prop_id)
	{
		case PROP_NAVIGATION:
			g_value_set_int (value, dialog->priv->nav_flags);
			break;
	}
}

static void
find_dialog_class_init (FindDialogClass *klass)
{
        GObjectClass *object_class = G_OBJECT_CLASS (klass);
	EphyDialogClass *ephy_dialog_class;

        parent_class = g_type_class_peek_parent (klass);
	ephy_dialog_class = EPHY_DIALOG_CLASS (klass);

        object_class->finalize = find_dialog_finalize;
	object_class->get_property = ephy_find_dialog_get_property;

	ephy_dialog_class->construct = impl_construct;
	ephy_dialog_class->destruct = impl_destruct;
	ephy_dialog_class->show = impl_show;

	g_object_class_install_property (object_class,
					 PROP_NAVIGATION,
					 g_param_spec_int ("navigation",
							   "Navigation flags",
							   "The find dialog's navigation flags",
							    0,
							    FIND_CAN_GO_PREV |
							    FIND_CAN_GO_NEXT,
							    0,
							    G_PARAM_READABLE));
}

static void
ensure_constructed (FindDialog *dialog)
{
	if (!dialog->priv->constructed)
	{
		ephy_dialog_construct (EPHY_DIALOG(dialog),
				       properties,
				       "epiphany.glade",
				       "find_dialog");
	}
}

static void
sync_page_change (EphyEmbed *embed, FindDialog *dialog)
{
	g_return_if_fail (IS_EPHY_EMBED (embed));

	if (dialog->priv->constructed == FALSE) return;

	set_navigation_flags (dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);

	find_get_info (EPHY_DIALOG (dialog));
}

static void
unset_old_embed (FindDialog *dialog)
{
	if (dialog->priv->old_embed != NULL)
	{
		g_signal_handlers_disconnect_by_func (dialog->priv->old_embed,
						      G_CALLBACK (sync_page_change),
						      dialog);
		g_object_remove_weak_pointer (G_OBJECT (dialog->priv->old_embed),
					      (gpointer *)&dialog->priv->old_embed);

		dialog->priv->old_embed = NULL;
	}
}

static void
sync_embed (FindDialog *dialog, GParamSpec *pspec, gpointer data)
{
	EphyEmbed *embed;

	unset_old_embed (dialog);

	embed = ephy_embed_dialog_get_embed (EPHY_EMBED_DIALOG (dialog));
	g_return_if_fail (IS_EPHY_EMBED (embed));
	dialog->priv->old_embed = embed;

	g_signal_connect (G_OBJECT (embed), "ge_location",
			  G_CALLBACK (sync_page_change), dialog);

	g_object_add_weak_pointer (G_OBJECT (embed),
				   (gpointer *)&dialog->priv->old_embed);

	if (dialog->priv->constructed)
	{
		set_navigation_flags (dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);
	
		find_get_info (EPHY_DIALOG (dialog));
	}
	else
	{
		set_navigation_flags (dialog, 0);
	}
}

static void
find_dialog_init (FindDialog *dialog)
{
	dialog->priv = g_new0 (FindDialogPrivate, 1);

	dialog->priv->properties = NULL;
	dialog->priv->nav_flags = 0;
	dialog->priv->constructed = FALSE;
	dialog->priv->old_embed = NULL;

	g_signal_connect_object (dialog, "notify::embed",
				 G_CALLBACK (sync_embed), NULL, 0);

	ensure_constructed (dialog);
}

static void
impl_construct (EphyDialog *dialog,
                const EphyDialogProperty *properties,
                const char *file,
                const char *name)
{
	FIND_DIALOG(dialog)->priv->constructed = TRUE;

	EPHY_DIALOG_CLASS (parent_class)->construct (dialog, properties, file, name);
}

static void
impl_destruct (EphyDialog *dialog)
{
	FIND_DIALOG(dialog)->priv->constructed = FALSE;

	EPHY_DIALOG_CLASS (parent_class)->destruct (dialog);
}

static void
find_get_info (EphyDialog *dialog)
{
        EmbedFindInfo *properties;
        char *search_string;
	GValue word = {0, };
	GValue match_case = {0, };
	GValue wrap = {0, };
	FindDialog *find_dialog = FIND_DIALOG(dialog);

	if (find_dialog->priv->constructed == FALSE) return;

        /* get the search string from the entry field */
	ephy_dialog_get_value (dialog, WORD_PROP, &word);
        search_string = g_strdup(g_value_get_string (&word));
	g_value_unset (&word);

        /* don't do null searches */
        if (search_string && search_string[0] == '\0')
        {
		set_navigation_flags (find_dialog, 0);
                return;
        }

	if (find_dialog->priv->properties != NULL)
	{
		g_free (find_dialog->priv->properties->search_string);
		g_free (find_dialog->priv->properties);
	}

        /* build search structure */
        properties = g_new0 (EmbedFindInfo,1);
        properties->search_string = search_string;

	ephy_dialog_get_value (dialog, MATCH_CASE_PROP, &match_case);
        properties->match_case = g_value_get_boolean (&match_case);

	ephy_dialog_get_value (dialog, AUTOWRAP_PROP, &wrap);
        properties->wrap = g_value_get_boolean (&wrap);

        properties->entire_word = FALSE;
	properties->search_frames = TRUE;

	find_dialog->priv->properties = properties;
}

static void
impl_show (EphyDialog *dialog)
{
	GdkPixbuf *icon;
	FindDialog *find_dialog = FIND_DIALOG(dialog);
	ensure_constructed (find_dialog);

	set_navigation_flags (find_dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);
	find_dialog->priv->window = ephy_dialog_get_control (dialog, WINDOW_PROP);
	find_get_info (dialog);

	/* Focus the text entry.  This will correctly select or leave
	 * unselected the existing text in the entry depending on the
	 * 'gtk-entry-select-on-focus = 0 / 1' setting in user's gtkrc.
	 */
	gtk_widget_grab_focus (ephy_dialog_get_control (dialog, WORD_PROP));

	icon = gtk_widget_render_icon (find_dialog->priv->window, 
						      GTK_STOCK_FIND,
						      GTK_ICON_SIZE_MENU,
						      "find_dialog");
	gtk_window_set_icon (GTK_WINDOW(find_dialog->priv->window), icon);
	g_object_unref (icon);

	EPHY_DIALOG_CLASS (parent_class)->show (dialog);
}

static void
find_dialog_finalize (GObject *object)
{
	FindDialog *dialog;

        g_return_if_fail (object != NULL);
        g_return_if_fail (IS_FIND_DIALOG (object));

	dialog = FIND_DIALOG (object);

	g_signal_handlers_disconnect_by_func (dialog, G_CALLBACK (sync_embed), NULL);

        g_return_if_fail (dialog->priv != NULL);

	unset_old_embed (dialog);

        g_free (dialog->priv);

        G_OBJECT_CLASS (parent_class)->finalize (object);
}

EphyDialog *
find_dialog_new (EphyEmbed *embed)
{
	FindDialog *dialog;

	dialog = FIND_DIALOG (g_object_new (FIND_DIALOG_TYPE,
				     "embed", embed,
				     NULL));

	return EPHY_DIALOG(dialog);
}

EphyDialog *
find_dialog_new_with_parent (GtkWidget *window,
			     EphyEmbed *embed)
{
	FindDialog *dialog;

	dialog = FIND_DIALOG (g_object_new (FIND_DIALOG_TYPE,
				     "embed", embed,
				     "ParentWindow", window,
				     NULL));

	return EPHY_DIALOG(dialog);
}

void
find_dialog_go_next (FindDialog *dialog,
		     gboolean interactive)
{
	gresult result;
	EphyEmbed *embed;

	g_return_if_fail (IS_FIND_DIALOG (dialog));
	if ((dialog->priv->nav_flags & FIND_CAN_GO_NEXT) == 0) return;

	dialog->priv->properties->backwards = FALSE;
	dialog->priv->properties->interactive = interactive;

	embed = ephy_embed_dialog_get_embed (EPHY_EMBED_DIALOG(dialog));
	g_return_if_fail (embed != NULL);

        result = ephy_embed_find (embed, dialog->priv->properties);

	if (result == G_OK)
	{
		set_navigation_flags (dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);
	}
	else
	{
		set_navigation_flags (dialog, FIND_CAN_GO_PREV);
	}
}

void
find_dialog_go_prev (FindDialog *dialog,
		     gboolean interactive)
{
	gresult result;
	EphyEmbed *embed;

	g_return_if_fail (IS_FIND_DIALOG (dialog));
	if ((dialog->priv->nav_flags & FIND_CAN_GO_PREV) == 0) return;

	dialog->priv->properties->backwards = TRUE;
	dialog->priv->properties->interactive = interactive;

	embed = ephy_embed_dialog_get_embed (EPHY_EMBED_DIALOG(dialog));
	g_return_if_fail (embed != NULL);

	result = ephy_embed_find (embed, dialog->priv->properties);

	if (result == G_OK)
	{
		set_navigation_flags (dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);
	}
	else
	{
		set_navigation_flags (dialog, FIND_CAN_GO_NEXT);
	}
}

void
find_close_button_clicked_cb (GtkWidget *button,
			      EphyDialog *dialog)
{
	ephy_dialog_destruct (dialog);
	g_object_unref (dialog);
}

void find_next_button_clicked_cb (GtkWidget *button,
				  EphyDialog *dialog)
{
	find_dialog_go_next (FIND_DIALOG(dialog), TRUE);
}

void
find_prev_button_clicked_cb (GtkWidget *button,
			     EphyDialog *dialog)
{
	find_dialog_go_prev (FIND_DIALOG(dialog), TRUE);
}

void
find_entry_changed_cb  (GtkWidget *editable,
			EphyDialog *dialog)
{
	FindDialog *find_dialog = FIND_DIALOG(dialog);

	set_navigation_flags (find_dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);

	find_get_info (dialog);
}

void
find_check_toggled_cb (GtkWidget *toggle,
                       EphyDialog *dialog)
{
	FindDialog *find_dialog = FIND_DIALOG(dialog);

	set_navigation_flags (find_dialog, FIND_CAN_GO_PREV | FIND_CAN_GO_NEXT);

	find_get_info (dialog);
}

FindNavigationFlags
find_dialog_get_navigation_flags (FindDialog *dialog)
{
	g_return_val_if_fail (IS_FIND_DIALOG (dialog), 0);

	return dialog->priv->nav_flags;
}