netsurf/render/search.h

/*
 * Copyright 2009 Mark Benjamin <netsurf-browser.org.MarkBenjamin@dfgh.net>
 *
 * 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_RENDER_SEARCH_H_
#define _NETSURF_RENDER_SEARCH_H_

#include <ctype.h>
#include <string.h>

#include "desktop/search.h"

struct search_context;

/**
 * create a search_context
 *
 * \param c 	the content the search_context is connected to
 * \param type	the content type of c
 * \param callbacks the callbacks to modify appearance according to results
 * \param p 	the pointer to send to the callbacks
 * \return true for success
 */
struct search_context * search_create_context(struct content *c,
		content_type type, struct gui_search_callbacks *callbacks,
		void *gui_data);

/**
 * Ends the search process, invalidating all state
 * freeing the list of found boxes
 */
void search_destroy_context(struct search_context *context);

/**
 * Begins/continues the search process
 * Note that this may be called many times for a single search.
 *
 * \param bw the browser_window to search in
 * \param flags the flags forward/back etc
 * \param string the string to match
 */
void search_step(struct search_context *context, search_flags_t flags,
		const char * string);

/**
 * Specifies whether all matches or just the current match should
 * be highlighted in the search text.
 */
void search_show_all(bool all, struct search_context *context);

/**
 * Determines whether any portion of the given text box should be
 * selected because it matches the current search string.
 *
 * \param  bw            browser window
 * \param  start_offset  byte offset within text of string to be checked
 * \param  end_offset    byte offset within text
 * \param  start_idx     byte offset within string of highlight start
 * \param  end_idx       byte offset of highlight end
 * \return true iff part of the box should be highlighted
 */
bool search_term_highlighted(struct content *c,
		unsigned start_offset, unsigned end_offset,
		unsigned *start_idx, unsigned *end_idx,
		struct search_context *context);

#endif