/*
 * Copyright 2012 - 2013 Michael Drake <tlsa@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf 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; version 2 of the License.
 *
 * NetSurf 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef _NETSURF_DESKTOP_GLOBAL_HISTORY_H_
#define _NETSURF_DESKTOP_GLOBAL_HISTORY_H_

#include <stdbool.h>
#include <stdint.h>

#include "desktop/core_window.h"
#include "desktop/textinput.h"
#include "utils/errors.h"

struct redraw_context;
struct nsurl;

enum browser_mouse_state;

/**
 * Initialise the global history.
 *
 * This iterates through the URL database, generating the global history data,
 * and creates a treeview.
 *
 * This must be called before any other global_history_* function.
 *
 * \param cw_t Callback table for core_window containing the treeview.
 * \param core_window_handle The core_window in which the treeview is shown.
 * \return NSERROR_OK on success, appropriate error otherwise
 */
nserror global_history_init(struct core_window_callback_table *cw_t,
		void *core_window_handle);

/**
 * Finalise the global history.
 *
 * This destroys the global history treeview and the global history module's
 * internal data.  After calling this if global history is required again,
 * global_history_init must be called.
 *
 * \return NSERROR_OK on success, appropriate error otherwise
 */
nserror global_history_fini(void);

/**
 * Add an entry to the global history.
 *
 * If the URL already exists in the global history, the old node is removed.
 *
 * \param url		URL for node being added
 * \return NSERROR_OK on success, appropriate error otherwise
 */
nserror global_history_add(struct nsurl *url);

/*
 * Save global history to file (html)
 *
 * \param path		The path to save history to
 * \param title		The title to give the document, or NULL for default
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
nserror global_history_export(const char *path, const char *title);

/**
 * Redraw the global history.
 *
 * \param x     X coordinate to render treeview at
 * \param y     Y coordinate to render treeview at
 * \param clip  Current clip rectangle (wrt tree origin)
 * \param ctx   Current redraw context
 */
void global_history_redraw(int x, int y, struct rect *clip,
		const struct redraw_context *ctx);

/**
 * Handles all kinds of mouse action
 *
 * \param mouse		The current mouse state
 * \param x		X coordinate
 * \param y		Y coordinate
 */
void global_history_mouse_action(enum browser_mouse_state mouse, int x, int y);

/**
 * Key press handling.
 *
 * \param key		The ucs4 character codepoint
 * \return true if the keypress is dealt with, false otherwise.
 */
void global_history_keypress(uint32_t key);

/**
 * Determine whether there is a selection
 *
 * \return true iff there is a selection
 */
bool global_history_has_selection(void);

/**
 * Get the first selected node
 *
 * \param url		Updated to the selected entry's address, or NULL
 * \param title		Updated to the selected entry's title, or NULL
 * \return true iff global history has a selection
 */
bool global_history_get_selection(struct nsurl **url, const char **title);

/**
 * Expand the treeview's nodes
 *
 * \param only_folders	Iff true, only folders are expanded.
 * \return NSERROR_OK on success, appropriate error otherwise
 */
nserror global_history_expand(bool only_folders);

/**
 * Contract the treeview's nodes
 *
 * \param all		Iff false, only entries are contracted.
 * \return NSERROR_OK on success, appropriate error otherwise
 */
nserror global_history_contract(bool all);

#endif
