/********************************************************************\
 * gnc-ui-util.h -- utility functions for the GnuCash UI            *
 * Copyright (C) 2000 Dave Peticolas <dave@krondo.com>              *
 *                                                                  *
 * 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, contact:                        *
 *                                                                  *
 * Free Software Foundation           Voice:  +1-617-542-5942       *
 * 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652       *
 * Boston, MA  02110-1301,  USA       gnu@gnu.org                   *
\********************************************************************/

/** @addtogroup GUI
    @{ */
/** @addtogroup GuiUtility Utility functions for the GnuCash GUI
 * @{ */
/** @file gnc-ui-util.h
    @brief  utility functions for the GnuCash UI
    @author Copyright (C) 2000 Dave Peticolas <dave@krondo.com>
*/

#ifndef GNC_UI_UTIL_H
#define GNC_UI_UTIL_H

#include <glib.h>
#include <locale.h>

#include "Account.h"
#include "gncOwner.h"
#include "qof.h"

#ifdef __cplusplus
extern "C" {
#endif


typedef QofSession* (*QofSessionCB) (void);


char* gnc_normalize_account_separator (const char* separator);
gboolean gnc_reverse_balance(const Account* account);

/* Backward compatibility *******************************************
 * Return that book's support opening balance accounts by equity type slot */
void gnc_set_use_equity_type_opening_balance_account (QofBook* book);
gboolean gnc_using_equity_type_opening_balance_account (QofBook* book);

/* Default directory sections ***************************************/
#define GNC_PREFS_GROUP_OPEN_SAVE    "dialogs.open-save"
#define GNC_PREFS_GROUP_EXPORT       "dialogs.export-accounts"
#define GNC_PREFS_GROUP_REPORT       "dialogs.report"
#define GNC_PREF_AUTO_DECIMAL_POINT  "auto-decimal-point"
#define GNC_PREF_AUTO_DECIMAL_PLACES "auto-decimal-places"

/* Default directories **********************************************/

char* gnc_get_default_directory (const char* section);
void gnc_set_default_directory (const char* section,
                                const char* directory);

/* Engine enhancements & i18n ***************************************/
QofBook* gnc_get_current_book (void);

/* If there is no current session, there is no book and we must be dealing
 * with a new book. When gnucash is started with --nofile, there is
 * initially no session (and no book), but by the time we check, one
 * could have been created (for example, if an empty account tree tab is
 * opened, a session is created which creates a new, but empty, book).
 * A session is created and a book is loaded from a backend when gnucash is
 * started with a file, but selecting 'new file' keeps a session open. So we
 * need to check as well for a book with no accounts (root with no children). */
gboolean gnc_is_new_book (void);

void gnc_set_current_book_tax_name_type (gboolean name_changed,
                                            const char* tax_name,
                                            gboolean type_changed,
                                            const char* tax_type);
const char*  gnc_get_current_book_tax_name (void);
const char*  gnc_get_current_book_tax_type (void);
/** Calls gnc_book_option_num_field_source_change to initiate registered
  * callbacks when num_field_source book option changes so that
  * registers/reports can update themselves; sets feature flag */
void gnc_book_option_num_field_source_change_cb (gboolean num_action);
Account* gnc_get_current_root_account (void);
gnc_commodity_table* gnc_get_current_commodities (void);

/**
 * Get either the full name of the account or the simple name, depending on the
 * configuration parameter general/register/show_leaf_account_names.
 *
 * @param account The account to retrieve the name for.
 * @return A newly allocated string.
*/
char* gnc_get_account_name_for_register(const Account* account);

/**
 * Retrieve the account matching the given name starting from the descendants of
 * base_account.
 * @a name is either considered to be the name of the leaf in the account tree
 * or to be the full account path, depending on the configuration parameter
 * general.register/show_leaf_account_names.
 *
 * @param base_account The account to start the search at.
 * @param name The name to search for.
 * @return A pointer to the account, or NULL if the account was not found.
*/
Account* gnc_account_lookup_for_register(const Account* base_account, const
        char* name);

/**
 * Get either the full name of the account or the simple name, depending on the
 * show_leaf_accounts.
 *
 * @param account The account to retrieve the name for.
 * @param show_leaf_accounts Whether the full name will be returned.
 * @return A newly allocated string.
*/
char* gnc_get_account_name_for_split_register(const Account* account,
        gboolean show_leaf_accounts);

/*
 * This is a wrapper routine around an xaccGetBalanceInCurrency
 * function that handles additional needs of the gui.
 *
 * @param fn        The underlying function in Account.c to call to retrieve
 *                  a specific balance from the account.
 * @param account   The account to retrieve data about.
 * @param recurse   Include all sub-accounts of this account.
 * @param negative  An indication of whether or not the returned value
 *                  is negative.  This can be used by the caller to
 *                  easily decode whether or not to color the output.
 * @param commodity The commodity in which the account balance should
 *                  be returned. If NULL, the value will be returned in
 *                  the commodity of the account. This is normally used
 *                  to specify a currency, which forces the conversion
 *                  of things like stock account values from share
 *                  values to an amount the requested currency.
 */

const char*  gnc_get_reconcile_str (char reconciled_flag);
const char*  gnc_get_reconcile_valid_flags (void);
const char*  gnc_get_reconcile_flag_order (void);

#define WLINK 'w'
#define FLINK 'f'

/** Get a string containing documentation link valid flags
 *
 *  @return a string containing the list of valid link_flags
 */
const char* gnc_get_doclink_valid_flags (void);

/** Get a string containing document link flag order
 *
 * @return a string containing the document link flag change order
 */
const char* gnc_get_doclink_flag_order (void);

/** Get a string representing the document link type
 *
 * @param  link_flag The flag to convert into a string
 *
 * @return the i18n'd doclink string
 */
const char* gnc_get_doclink_str (char link_flag);

typedef enum
{
    EQUITY_OPENING_BALANCE,
    EQUITY_RETAINED_EARNINGS,
    NUM_EQUITY_TYPES
} GNCEquityType;

Account * gnc_find_or_create_equity_account (Account* root,
        GNCEquityType equity_type,
        gnc_commodity* currency);
gboolean gnc_account_create_opening_balance (Account* account,
        gnc_numeric balance,
        time64 date,
        QofBook* book);

/* Locale functions *************************************************/


/**
 * Returns the default currency of the current locale, or NULL if no
 * sensible currency could be identified from the locale. */
gnc_commodity* gnc_locale_default_currency_nodefault (void);

/**
 * Returns the default currency of the current locale. WATCH OUT: If
 * no currency could be identified from the locale, this one returns
 * "USD", but this will have nothing to do with the actual locale. */
gnc_commodity* gnc_locale_default_currency (void);


/** Return the default currency set by the user.  If the user's
 *  preference is invalid, then this routine will return the default
 *  currency for the user's locale.
 *
 *  @return A pointer to a currency.
 */
gnc_commodity* gnc_default_currency (void);

/** Returns a gnc_commodity that is a currency, suitable for being a
Transaction's currency. The gnc_commodity is taken either from the current
account, or from the next parent account that has a gnc_commodity that is a
currency, or from gnc_default_currency().

If the given account or any of its parent account have a commodity that is a
currency, it is returned and the gboolean currency_from_account_found is set to
TRUE (if non-NULL). If neither this account nor any of its parent accounts have
such a commodity, gnc_default_currency() is returned and the gboolean
currency_from_account_found is set to FALSE (if non-NULL). This can be used to
show an appropriate warning message.

If account is NULL, gnc_default_currency() is returned and
currency_from_account_found is set to FALSE.

@param account The account where the currency should be looked up. May be NULL.

@param currency_from_account_found A gboolean pointer that takes the output
argument of whether the returned currency was found in the account. May be
NULL.

@return A currency pointer (and never NULL).
*/
gnc_commodity* gnc_account_or_default_currency(const Account* account,
                                               gboolean* currency_from_account_found);

/** Return the default currency for use in reports, as set by the
 *  user.  If the user's preference is invalid, then this routine will
 *  return the default currency for the user's locale.
 *
 *  @return A pointer to a currency.
 */
gnc_commodity* gnc_default_report_currency (void);

/* Amount printing and parsing **************************************/


typedef struct _GNCPrintAmountInfo
{
    const gnc_commodity *commodity;  /* may be NULL */

    guint8 max_decimal_places;
    guint8 min_decimal_places;

    unsigned int use_separators : 1; /* Print thousands separators */
    unsigned int use_symbol : 1;     /* Print currency symbol */
    unsigned int use_locale : 1;     /* Use locale for some positioning */
    unsigned int monetary : 1;       /* Is a monetary quantity */
    unsigned int force_fit : 1;      /* Don't print more than max_dp places */
    unsigned int round : 1;          /* Round at max_dp instead of truncating */
} GNCPrintAmountInfo;


GNCPrintAmountInfo gnc_default_print_info (gboolean use_symbol);

GNCPrintAmountInfo gnc_commodity_print_info (const gnc_commodity *commodity,
        gboolean use_symbol);

GNCPrintAmountInfo gnc_account_print_info (const Account *account,
        gboolean use_symbol);

GNCPrintAmountInfo gnc_split_amount_print_info (Split *split,
        gboolean use_symbol);

GNCPrintAmountInfo gnc_price_print_info (const gnc_commodity *curr,
        gboolean use_symbol);

GNCPrintAmountInfo gnc_share_print_info_places (int decplaces);
GNCPrintAmountInfo gnc_default_share_print_info (void);
GNCPrintAmountInfo gnc_default_price_print_info (const gnc_commodity *curr);

GNCPrintAmountInfo gnc_integral_print_info (void);

/* WARNING: Garbage in, garbage out.  You must check the validity of
   the supplied gnc_numeric.  If it's invalid, the returned string
   could point to ANYTHING. */
/*
 * The xaccPrintAmount() and xaccSPrintAmount() routines provide
 *    i18n'ed convenience routines for printing gnc_numerics.
 *    amounts. Both routines take a gnc_numeric argument and
 *    a printing information object.
 *
 * The xaccPrintAmount() routine returns a pointer to a statically
 *    allocated buffer, and is therefore not thread-safe.
 *
 * The xaccSPrintAmount() routine accepts a pointer to the buffer to be
 *    printed to.  It returns the length of the printed string.
 */
/**
 * Make a string representation of a gnc_numeric.  Warning, the
 * gnc_numeric is not checked for validity and the returned char* may
 * point to random garbage.
 */
const char*  xaccPrintAmount (gnc_numeric val, GNCPrintAmountInfo info);
/**
 * Make a string representation of a gnc_numeric.  Warning, the
 * gnc_numeric is not checked for validity and the contents of the
 * buffer will be unchanged. It is up to the calling function to
 * ensure that buf is large enough for the results.
 */
int xaccSPrintAmount (char* buf, gnc_numeric val, GNCPrintAmountInfo info);

const char* printable_value(gdouble val, gint denom);
char* number_to_words(gdouble val, gint64 denom);
char* numeric_to_words(gnc_numeric val);

/**  Parses in_str to obtain a numeric result. The
 *   routine will parse as much of in_str as it can to obtain a single
 *   number. The number is parsed using the current locale information
 *   and the 'monetary' flag. The routine will return TRUE if it
 *   successfully parsed a number and FALSE otherwise. If TRUE is
 *   returned and result is non-NULL, the value of the parsed number
 *   is stored in *result. If FALSE is returned, *result is
 *   unchanged. If TRUE is returned and endstr is non-NULL, the
 *   location of the first character in in_str not used by the parser
 *   will be returned in *endstr. If FALSE is returned and endstr is
 *   non-NULL, *endstr will point to in_str. */
gboolean xaccParseAmount (const char*  in_str, gboolean monetary,
                          gnc_numeric* result, char** endstr);

/**
 * Converts a string to a gnc_numeric. The caller must provide all the
 * locale-specific information.
 *
 * ignore_list is a list of characters that are completely ignored
 * while processing the input string.  If ignore_list is NULL, nothing
 * is ignored.
 */
gboolean
xaccParseAmountExtended (const char*  in_str, gboolean monetary,
                         gunichar negative_sign, gunichar decimal_point,
                         gunichar group_separator, const char* ignore_list,
                         gnc_numeric* result, char** endstr);

/**
 * Similar to xaccParseAmount, but with two differences
 * - it exposes a flag to indicate whether the
 * locale's positive sign (or in absence the '+') character is
 * ignored. Setting skip to TRUE will cause the function to ignore any
 * positive sign. Setting it to FALSE, and positive signs will be
 * treated as unrecognized characters.  xaccParseAmount will run as if
 * skip is FALSE for compatibility reasons (gnc-expression-parser
 * depends on this behaviour).
 * - The other important difference with xaccParseAmount is that this
 * function will never apply automatic decimal point logc, whereas
 * xaccParseAmount will follow the automatic decimal point preference
 * as set by the user.
 */
gboolean
xaccParseAmountImport (const char*  in_str, gboolean monetary,
                       gnc_numeric* result,
                       char** endstr, gboolean skip);

/**
 * Similar to xaccParseAmountExtended, but will not automatically
 * set a decimal point, regardless of what the user has set for this
 * option. Primarily meant for cases where numbers are coming into
 * gnucash that are not typed in by the user (like via csv import).
 */
gboolean
xaccParseAmountExtImport (const char*  in_str, gboolean monetary,
                             gunichar negative_sign, gunichar decimal_point,
                             gunichar group_separator, const char* ignore_list,
                             gnc_numeric* result, char** endstr);

/**
 * Make a string representation of a gnc_numeric.  Warning, the
 * gnc_numeric is not checked for validity and the returned char* may
 * point to random garbage.
 *
 * This is the same as xaccPrintAmount but wraps the output with BiDi
 * left to right isolate if a symbol is displayed.
 */
const char*
gnc_print_amount_with_bidi_ltr_isolate (gnc_numeric val,
                                        GNCPrintAmountInfo info);

/**
 * This function helps with GTK's use of 'Unicode Bidirectional
 * Text Algorithm'. To keep the format of the text, this function wraps
 * the text with a BiDi isolate charatcter and a BiDi closing character.
 *
 * This helps with monetary values in RTL languages that display the
 * currency symbol.
 */
char*
gnc_wrap_text_with_bidi_ltr_isolate (const char* text);

/* Initialization ***************************************************/

void gnc_ui_util_init (void);

/* Remove callback preferences **************************************/

void gnc_ui_util_remove_registered_prefs (void);

/** Returns the incoming text removed of control characters
 *
 * @param incoming_text The text to filter
 *
 * @return The incoming text filtered of control characters to be
 *         freed by the caller.
 */
char*  gnc_filter_text_for_control_chars (const char* incoming_text);

/** Updates cursor_position after removal of currency symbols
 *
 * @param incoming_text The text to filter
 *
 * @param symbol to remove
 *
 * @param cursor_position the position of cursor in the incoming text
 *
 * @return nothing
 */
void gnc_filter_text_set_cursor_position (const char* incoming_text,
                                          const char* symbol,
                                          int* zcursor_position);

/** Returns the incoming text removed of a currency symbol
 *
 * @param incoming_text The text to filter
 *
 * @param symbol to remove
 *
 * @param cursor_position the position of cursor in the incoming text
 *
 * @return The incoming text with symbol removed to be freed by the caller
 */
char* gnc_filter_text_for_currency_symbol (const char* incoming_text,
                                           const char* symbol);

/** Returns the incoming text removed of currency symbol
 *
 * @param comm commodity of entry if known
 *
 * @param incoming_text The text to filter
 *
 * @param symbol return the symbol used
 *
 * @return The incoming text with symbol removed to be freed by the caller
 */
char* gnc_filter_text_for_currency_commodity (const gnc_commodity *comm,
                                              const char* incoming_text,
                                              const char** symbol);

/** This function takes a GList of char*, and uses locale-sensitive
 *  list formatter.
 *
 *  @param strings The GList* of char*.
 *
 * @returns a newly allocated char*
 */
gchar* gnc_list_formatter (GList* strings);

#ifdef __cplusplus
}
#endif

#endif
/** @} */
/** @} */
