/*
 * Copyright (C) 2002-2006 Sergey V. Udaltsov <svu@gnome.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __XKLAVIER_PRIVATE_H__
#define __XKLAVIER_PRIVATE_H__

#include <stdio.h>

#include <libxml/xpath.h>

#include <libxklavier/xklavier.h>

enum { WM_NAME,
	WM_STATE,
	XKLAVIER_STATE,
	XKLAVIER_TRANSPARENT,
	XKLAVIER_ALLOW_SECONDARY,
	TOTAL_ATOMS
};

#define XKL_NUMBER_OF_REGISTRY_DOCS 2

/* We have 3 values in XklEngineListenModes */
enum {
	XKLL_MANAGE_WINDOW_STATES_OFFSET = 0,
	XKLL_TRACK_KEYBOARD_STATE_OFFSET,
	XKLL_MANAGE_LAYOUTS_OFFSET,
	XKLL_NUMBER_OF_LISTEN_MODES
};


struct _XklEnginePrivate {

	gboolean group_per_toplevel_window;

	gboolean handle_indicators;

	gboolean skip_one_restore;

	gint default_group;

	/*
	 * Separate counter for each of XklEngineListenModes!
	 */
	guchar listener_type_counters[XKLL_NUMBER_OF_LISTEN_MODES];
#define xkl_engine_is_listening_for(engine, type) (xkl_engine_priv((engine), listener_type_counters)[type##_OFFSET] > 0)

	guint secondary_groups_mask;

	Window root_window;

	Window prev_toplvl_win;

	Window curr_toplvl_win;

	XErrorHandler default_error_handler;

	Status last_error_code;

	XklState curr_state;

	gboolean criticalSection;

	Atom atoms[TOTAL_ATOMS];

	Display *display;

	/*
	 * Backend name
	 */
	const gchar *backend_id;

	/*
	 * Functions supported by the backend, combination of XKLF_* constants
	 */
	guint8 features;

	/*
	 * Activates the configuration.
	 * xkb: create proper the XkbDescRec and send it to the server
	 * xmodmap: save the property, init layout #1
	 */
	 gboolean(*activate_config_rec) (XklEngine * engine,
					 const XklConfigRec * data);

	/*
	 * Background-specific initialization.
	 * xkb: XkbInitAtoms - init internal xkb atoms table
	 * xmodmap: void.
	 */
	void (*init_config_registry) (XklConfigRegistry * config);

	/*
	 * Loads the registry tree into DOM (using whatever path(s))
	 * The XklVTConfigFreeRegistry is static - no virtualization necessary.
	 * xkb: loads xml from XKB_BASE+"/rules/"+ruleset+".xml"
	 * xmodmap: loads xml from XMODMAP_BASE+"/"+ruleset+".xml"
	 */
	 gboolean(*load_config_registry) (XklConfigRegistry * config,
					  gboolean if_extras_needed);

	/*
	 * Write the configuration into the file (binary/textual)
	 * xkb: write xkb or xkm file
	 * xmodmap: if text requested, just dump XklConfigRec to the 
	 * file - not really useful. If binary - fail (not supported)
	 */
	 gboolean(*write_config_rec_to_file) (XklEngine * engine,
					      const gchar * file_name,
					      const XklConfigRec * data,
					      const gboolean binary);

	/*
	 * Get the list of the group names
	 * xkb: return cached list of the group names
	 * xmodmap: return the list of layouts from the internal XklConfigRec
	 */
	const gchar **(*get_groups_names) (XklEngine * engine);

	/*
	 * Get the list of the indicators names
	 * xkb: return cached list of the indicators names
	 * xmodmap: return NULL
	 */
	const gchar **(*get_indicators_names) (XklEngine * engine);

	/*
	 * Get the maximum number of loaded groups
	 * xkb: returns 1 or XkbNumKbdGroups
	 * xmodmap: return 0
	 */
	 guint(*get_max_num_groups) (XklEngine * engine);

	/*
	 * Get the number of loaded groups
	 * xkb: return from the cached XkbDesc
	 * xmodmap: return number of layouts from internal XklConfigRec
	 */
	 guint(*get_num_groups) (XklEngine * engine);

	/*
	 * Switches the keyboard to the group N
	 * xkb: simple one-liner to call the XKB function
	 * xmodmap: changes the root window property 
	 * (listener invokes xmodmap with appropriate config file).
	 */
	void (*lock_group) (XklEngine * engine, gint group);

	/*
	 * Handles X events.
	 * xkb: XkbEvent handling
	 * xmodmap: keep track on the root window properties. What else can we do?
	 */
	 gint(*process_x_event) (XklEngine * engine, XEvent * xev);

	/*
	 * Handles X errors.
	 * return 0 if further processing is needed
	 *        1 if error was handled
	 */
	 gint(*process_x_error) (XklEngine * engine, XErrorEvent * xerev);

	/*
	 * Flushes the cached server config info.
	 * xkb: frees XkbDesc
	 * xmodmap: frees internal XklConfigRec
	 */
	void (*free_all_info) (XklEngine * engine);

	/*
	 * Compares the cached info with the actual one, from the server
	 * xkb: Compares some parts of XkbDescPtr
	 * xmodmap: returns False
	 */
	 gboolean(*if_cached_info_equals_actual) (XklEngine * engine);

	/*
	 * Loads the configuration info from the server
	 * xkb: loads XkbDesc, names, indicators
	 * xmodmap: loads internal XklConfigRec from server
	 */
	 gboolean(*load_all_info) (XklEngine * engine);

	/*
	 * Gets the current state
	 * xkb: XkbGetState and XkbGetIndicatorState
	 * xmodmap: check the root window property (regarding the group)
	 */
	void (*get_server_state) (XklEngine * engine,
				  XklState * current_state_out);

	/*
	 * Stop tracking the keyboard-related events
	 * xkb: XkbSelectEvents(..., 0)
	 * xmodmap: Ungrab the switching shortcut.
	 */
	 gint(*pause_listen) (XklEngine * engine);

	/*
	 * Start tracking the keyboard-related events
	 * xkb: XkbSelectEvents + XkbSelectEventDetails
	 * xmodmap: Grab the switching shortcut.
	 */
	 gint(*resume_listen) (XklEngine * engine);

	/*
	 * Set the indicators state from the XklState
	 * xkb: XklSetIndicator for all indicators
	 * xmodmap: NULL. Not supported
	 */
	void (*set_indicators) (XklEngine * engine,
				const XklState * window_state);

	/*
	 * Perform the cleanup
	 */
	void (*finalize) (XklEngine * engine);

	/* all data is private - no direct access */
	/*
	 * The base configuration atom.
	 * xkb: _XKB_RF_NAMES_PROP_ATOM
	 * xmodmap:  "_XMM_NAMES"
	 */
	Atom base_config_atom;

	/*
	 * The configuration backup atom
	 * xkb: "_XKB_RULES_NAMES_BACKUP"
	 * xmodmap: "_XMM_NAMES_BACKUP"
	 */
	Atom backup_config_atom;

	/*
	 * Fallback for missing model
	 */
	const gchar *default_model;

	/*
	 * Fallback for missing layout
	 */
	const gchar *default_layout;

	/*
	 * Any stuff backend might need to put in here
	 */
	gpointer backend;
};

extern XklEngine *xkl_get_the_engine(void);

struct _XklConfigRegistryPrivate {
	XklEngine *engine;

	xmlDocPtr docs[XKL_NUMBER_OF_REGISTRY_DOCS];
	xmlXPathContextPtr xpath_contexts[XKL_NUMBER_OF_REGISTRY_DOCS];
};

extern void xkl_engine_ensure_vtable_inited(XklEngine * engine);

extern void xkl_engine_process_focus_in_evt(XklEngine * engine,
					    XFocusChangeEvent * fev);
extern void xkl_engine_process_focus_out_evt(XklEngine * engine,
					     XFocusChangeEvent * fev);
extern void xkl_engine_process_property_evt(XklEngine * engine,
					    XPropertyEvent * rev);
extern void xkl_engine_process_create_window_evt(XklEngine * engine,
						 XCreateWindowEvent * cev);

extern int xkl_process_error(Display * dpy, XErrorEvent * evt);

extern void xkl_engine_process_state_modification(XklEngine * engine,
						  XklEngineStateChange
						  change_type, gint group,
						  unsigned inds,
						  gboolean set_indicators);

extern Window xkl_engine_get_registered_parent(XklEngine * engine,
					       Window win);
extern void xkl_engine_reset_all_info(XklEngine * engine, gboolean force,
				      const gchar reason[]);
extern gboolean xkl_engine_load_window_tree(XklEngine * engine);
extern gboolean xkl_engine_load_subtree(XklEngine * engine, Window window,
					gint level, XklState * init_state);

extern gboolean xkl_engine_if_window_has_wm_state(XklEngine * engine,
						  Window win);


/**
 * Toplevel window stuff
 */
extern void xkl_engine_add_toplevel_window(XklEngine * engine, Window win,
					   Window parent, gboolean force,
					   XklState * init_state);

extern gboolean xkl_engine_find_toplevel_window_bottom_to_top(XklEngine *
							      engine,
							      Window win,
							      Window *
							      toplevel_win_out);

extern gboolean xkl_engine_find_toplevel_window(XklEngine * engine,
						Window win,
						Window * toplevel_win_out);

extern gboolean xkl_engine_is_toplevel_window_transparent(XklEngine *
							  engine,
							  Window
							  toplevel_win);

extern void xkl_engine_set_toplevel_window_transparent(XklEngine * engine,
						       Window toplevel_win,
						       gboolean
						       transparent);

extern gboolean xkl_engine_get_toplevel_window_state(XklEngine * engine,
						     Window toplevel_win,
						     XklState * state_out);

extern void xkl_engine_remove_toplevel_window_state(XklEngine * engine,
						    Window toplevel_win);
extern void xkl_engine_save_toplevel_window_state(XklEngine * engine,
						  Window toplevel_win,
						  XklState * state);
/***/

extern void xkl_engine_select_input_merging(XklEngine * engine, Window win,
					    gulong mask);

extern gchar *xkl_get_debug_window_title(XklEngine * engine, Window win);

extern Status xkl_engine_query_tree(XklEngine * engine,
				    Window w,
				    Window * root_out,
				    Window * parent_out,
				    Window ** children_out,
				    guint * nchildren_out);

extern void xkl_engine_try_call_state_func(XklEngine * engine,
					   XklEngineStateChange
					   change_type,
					   XklState * old_state);

extern gchar *xkl_engine_get_ruleset_name(XklEngine * engine,
					  const gchar default_ruleset[]);

extern gboolean xkl_config_rec_get_full_from_server(gchar **
						    rules_file_out,
						    XklConfigRec * data,
						    XklEngine * engine);

extern gchar *xkl_strings_concat_comma_separated(gchar ** array);

extern void xkl_strings_split_comma_separated(gchar *** array,
					      const gchar * merged);

/**
 * XConfigRec
 */
extern gchar *xkl_config_rec_merge_layouts(const XklConfigRec * data);

extern gchar *xkl_config_rec_merge_variants(const XklConfigRec * data);

extern gchar *xkl_config_rec_merge_options(const XklConfigRec * data);

extern void xkl_config_rec_split_layouts(XklConfigRec * data,
					 const gchar * merged);

extern void xkl_config_rec_split_variants(XklConfigRec * data,
					  const gchar * merged);

extern void xkl_config_rec_split_options(XklConfigRec * data,
					 const gchar * merged);
/***/

extern void xkl_config_rec_dump(FILE * file, XklConfigRec * data);

extern const gchar *xkl_event_get_name(gint type);

extern void xkl_engine_update_current_state(XklEngine * engine, gint group,
					    unsigned indicators,
					    const gchar reason[]);

extern gint xkl_xkb_init(XklEngine * engine);

extern gint xkl_xmm_init(XklEngine * engine);

extern gboolean
xkl_engine_is_one_switch_to_secondary_group_allowed(XklEngine * engine);

extern void xkl_engine_one_switch_to_secondary_group_performed(XklEngine *
							       engine);

extern gboolean xkl_config_registry_load_from_file(XklConfigRegistry *
						   config,
						   const gchar * file_name,
						   gint docidx);

extern void xkl_config_registry_free(XklConfigRegistry * config);

extern gchar *xkl_locale_from_utf8(XklConfigRegistry * config,
				   const gchar * utf8string);

extern gboolean xkl_config_registry_load_helper(XklConfigRegistry * config, const char
						default_ruleset[],
						const char base_dir[],
						gboolean if_extras_needed);

#define XKLAVIER_STATE_PROP_LENGTH 2

/* taken from XFree86 maprules.c */
#define XKB_RF_NAMES_PROP_MAXLEN 1024

#define WINID_FORMAT "%lx"

#define xkl_engine_priv(engine,member)  (engine)->priv->member
#define xkl_engine_backend(engine,type,member)  ((type*)((engine)->priv->backend))->member
#define xkl_engine_get_display(engine) (xkl_engine_priv(engine,display))
#define xkl_engine_vcall(engine,func)  (*(engine)->priv->func)

#define xkl_config_registry_is_initialized(config) \
  ( xkl_config_registry_priv(config,xpath_contexts[0]) != NULL )

#define xkl_config_registry_priv(config,member)  (config)->priv->member
#define xkl_config_registry_get_engine(config) ((config)->priv->engine)

#define XKBCR_MODEL_PATH "/xkbConfigRegistry/modelList/model"
#define XKBCR_LAYOUT_PATH "/xkbConfigRegistry/layoutList/layout"
#define XKBCR_VARIANT_PATH XKBCR_LAYOUT_PATH "/variantList/variant"
#define XKBCR_GROUP_PATH "/xkbConfigRegistry/optionList/group"
#define XKBCR_OPTION_PATH XKBCR_GROUP_PATH "/option"

#define XML_TAG_DESCR "description"
#define XML_TAG_SHORT_DESCR "shortDescription"
#define XML_TAG_VENDOR "vendor"
#define XML_TAG_COUNTRY_LIST "countryList"
#define XML_TAG_LANGUAGE_LIST "languageList"
#define XML_TAG_ISO3166ID "iso3166Id"
#define XML_TAG_ISO639ID "iso639Id"

extern void





xkl_config_registry_foreach_in_xpath_with_param(XklConfigRegistry * config,
						const gchar * format,
						const gchar * value,
						ConfigItemProcessFunc func,
						gpointer data);

extern void xkl_config_registry_foreach_in_xpath(XklConfigRegistry *
						 config,
						 xmlXPathCompExprPtr
						 xpath_comp_expr,
						 ConfigItemProcessFunc
						 func, gpointer data);

extern gboolean xkl_read_config_item(XklConfigRegistry * config,
				     gint doc_index, xmlNodePtr iptr,
				     XklConfigItem * item);

extern gint xkl_debug_level;

extern const gchar *xkl_last_error_message;

#endif
