/********************************************************************\
 * gnc-ledger-display.c -- utilities for dealing with multiple      *
 *                         register/ledger windows in GnuCash       *
 *                                                                  *
 * Copyright (C) 1997 Robin D. Clark                                *
 * Copyright (C) 1997, 1998 Linas Vepstas                           *
 *                                                                  *
 * 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, write to the Free Software      *
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.        *
 *                                                                  *
\********************************************************************/

#include <config.h>

#include <time.h>

#include "Account.h"
#include "Query.h"
#include "qof.h"
#include "SX-book.h"
#include "Transaction.h"
#include "gnc-component-manager.h"
#include "gnc-date.h"
#include "gnc-engine.h"
#include "gnc-event.h"
#include "gnc-ledger-display.h"
#include "gnc-prefs.h"
#include "gnc-ui-util.h"
#include <gnc-glib-utils.h>
#include "split-register-control.h"
#include "split-register-model.h"


#define REGISTER_SINGLE_CM_CLASS     "register-single"
#define REGISTER_SUBACCOUNT_CM_CLASS "register-subaccount"
#define REGISTER_GL_CM_CLASS         "register-gl"
#define REGISTER_TEMPLATE_CM_CLASS   "register-template"

#define GNC_PREF_DOUBLE_LINE_MODE         "double-line-mode"
#define GNC_PREF_MAX_TRANS                "max-transactions"
#define GNC_PREF_DEFAULT_STYLE_LEDGER     "default-style-ledger"
#define GNC_PREF_DEFAULT_STYLE_AUTOLEDGER "default-style-autoledger"
#define GNC_PREF_DEFAULT_STYLE_JOURNAL    "default-style-journal"


struct gnc_ledger_display
{
    GncGUID leader;

    Query* query;

    GNCLedgerDisplayType ld_type;

    SplitRegister* reg;

    gboolean loading;
    gboolean use_double_line_default;
    gboolean visible; /* focus */
    gboolean needs_refresh;

    GNCLedgerDisplayDestroy destroy;
    GNCLedgerDisplayGetParent get_parent;

    GHashTable *excluded_template_acc_hash;

    gpointer user_data;

    gint number_of_subaccounts;

    gint component_id;
};


/** GLOBALS *********************************************************/
static QofLogModule log_module = GNC_MOD_LEDGER;


/** Declarations ****************************************************/
static GNCLedgerDisplay*
gnc_ledger_display_internal (Account* lead_account, Query* q,
                             GNCLedgerDisplayType ld_type,
                             SplitRegisterType reg_type,
                             SplitRegisterStyle style,
                             gboolean use_double_line,
                             gboolean is_template,
                             gboolean mismatched_commodities);

static void
gnc_ledger_display_refresh_internal (GNCLedgerDisplay* ld);

static void gnc_ledger_display_make_query (GNCLedgerDisplay* ld,
                                           gint limit,
                                           SplitRegisterType type);

/** Implementations *************************************************/

Account*
gnc_ledger_display_leader (GNCLedgerDisplay* ld)
{
    if (!ld)
        return NULL;

    return xaccAccountLookup (&ld->leader, gnc_get_current_book());
}

GNCLedgerDisplayType
gnc_ledger_display_type (GNCLedgerDisplay* ld)
{
    if (!ld)
        return -1;

    return ld->ld_type;
}

void
gnc_ledger_display_set_user_data (GNCLedgerDisplay* ld, gpointer user_data)
{
    if (!ld)
        return;

    ld->user_data = user_data;
}

gpointer
gnc_ledger_display_get_user_data (GNCLedgerDisplay* ld)
{
    if (!ld)
        return NULL;

    return ld->user_data;
}

void
gnc_ledger_display_set_handlers (GNCLedgerDisplay* ld,
                                 GNCLedgerDisplayDestroy destroy,
                                 GNCLedgerDisplayGetParent get_parent)
{
    if (!ld)
        return;

    ld->destroy = destroy;
    ld->get_parent = get_parent;
}

SplitRegister*
gnc_ledger_display_get_split_register (GNCLedgerDisplay* ld)
{
    if (!ld)
        return NULL;

    return ld->reg;
}

Query*
gnc_ledger_display_get_query (GNCLedgerDisplay* ld)
{
    if (!ld)
        return NULL;

    return ld->query;
}

static void
exclude_template_accounts (Query* q, GHashTable *excluded_template_acc_hash)
{
    Account* tRoot;
    GList* al;

    tRoot = gnc_book_get_template_root (gnc_get_current_book());
    al = gnc_account_get_descendants (tRoot);

    if (gnc_list_length_cmp (al, 0) && excluded_template_acc_hash)
    {
        GList *node, *next;

        for (node = al; node; node = next)
        {
            Account *acc = node->data;
            next = g_list_next (node);

            if (g_hash_table_lookup (excluded_template_acc_hash, acc) != NULL)
                al = g_list_delete_link (al, node);
            else
                g_hash_table_insert (excluded_template_acc_hash, acc, acc);
        }
    }
    if (gnc_list_length_cmp (al, 0))
        xaccQueryAddAccountMatch (q, al, QOF_GUID_MATCH_NONE, QOF_QUERY_AND);

    g_list_free (al);
    al = NULL;
    tRoot = NULL;
}

static gboolean
find_by_leader (gpointer find_data, gpointer user_data)
{
    Account* account = find_data;
    GNCLedgerDisplay* ld = user_data;

    if (!account || !ld)
        return FALSE;

    return (account == gnc_ledger_display_leader (ld));
}

static gboolean
find_by_query (gpointer find_data, gpointer user_data)
{
    Query* q = find_data;
    GNCLedgerDisplay* ld = user_data;

    if (ld->reg->type != SEARCH_LEDGER)
        return FALSE;

    if (!q || !ld)
        return FALSE;

    return ld->query == q;
}

static gboolean
find_by_reg (gpointer find_data, gpointer user_data)
{
    SplitRegister* reg = find_data;
    GNCLedgerDisplay* ld = user_data;

    if (!reg || !ld)
        return FALSE;

    return ld->reg == reg;
}

static SplitRegisterStyle
gnc_get_default_register_style (GNCAccountType type)
{
    SplitRegisterStyle new_style = REG_STYLE_LEDGER;

    if (gnc_prefs_get_bool (GNC_PREFS_GROUP_GENERAL_REGISTER,
                            GNC_PREF_DEFAULT_STYLE_JOURNAL))
        new_style = REG_STYLE_JOURNAL;
    else if (gnc_prefs_get_bool (GNC_PREFS_GROUP_GENERAL_REGISTER,
                                 GNC_PREF_DEFAULT_STYLE_AUTOLEDGER))
        new_style = REG_STYLE_AUTO_LEDGER;

    return new_style;
}

static gpointer
look_for_portfolio_cb (Account* account, gpointer data)
{
    return xaccAccountIsPriced (account) ? (gpointer) PORTFOLIO_LEDGER : NULL;
}

static SplitRegisterType
gnc_get_reg_type (Account* leader, GNCLedgerDisplayType ld_type)
{
    GNCAccountType account_type;
    SplitRegisterType reg_type;

    if (ld_type == LD_GL)
        return GENERAL_JOURNAL;

    account_type = xaccAccountGetType (leader);

    if (ld_type == LD_SINGLE)
    {
        switch (account_type)
        {
        case ACCT_TYPE_BANK:
            return BANK_REGISTER;

        case ACCT_TYPE_CASH:
            return CASH_REGISTER;

        case ACCT_TYPE_ASSET:
            return ASSET_REGISTER;

        case ACCT_TYPE_CREDIT:
            return CREDIT_REGISTER;

        case ACCT_TYPE_LIABILITY:
            return LIABILITY_REGISTER;

        case ACCT_TYPE_PAYABLE:
            return PAYABLE_REGISTER;

        case ACCT_TYPE_RECEIVABLE:
            return RECEIVABLE_REGISTER;

        case ACCT_TYPE_STOCK:
        case ACCT_TYPE_MUTUAL:
            return STOCK_REGISTER;

        case ACCT_TYPE_INCOME:
            return INCOME_REGISTER;

        case ACCT_TYPE_EXPENSE:
            return EXPENSE_REGISTER;

        case ACCT_TYPE_EQUITY:
            return EQUITY_REGISTER;

        case ACCT_TYPE_CURRENCY:
            return CURRENCY_REGISTER;

        case ACCT_TYPE_TRADING:
            return TRADING_REGISTER;

        default:
            PERR ("unknown account type %d\n", account_type);
            return BANK_REGISTER;
        }
    }

    if (ld_type != LD_SUBACCOUNT)
    {
        PERR ("unknown ledger type %d\n", ld_type);
        return BANK_REGISTER;
    }

    switch (account_type)
    {
    case ACCT_TYPE_BANK:
    case ACCT_TYPE_CASH:
    case ACCT_TYPE_ASSET:
    case ACCT_TYPE_CREDIT:
    case ACCT_TYPE_LIABILITY:
    case ACCT_TYPE_RECEIVABLE:
    case ACCT_TYPE_PAYABLE:
    {
        /* If any of the sub-accounts have ACCT_TYPE_STOCK or
         * ACCT_TYPE_MUTUAL types, then we must use the PORTFOLIO_LEDGER
         * ledger. Otherwise, a plain old GENERAL_JOURNAL will do. */
        gpointer ret;
        reg_type = GENERAL_JOURNAL;

        ret = gnc_account_foreach_descendant_until (leader, look_for_portfolio_cb,
                                                    NULL);
        if (ret) reg_type = PORTFOLIO_LEDGER;
        break;
    }

    case ACCT_TYPE_STOCK:
    case ACCT_TYPE_MUTUAL:
    case ACCT_TYPE_CURRENCY:
        reg_type = PORTFOLIO_LEDGER;
        break;

    case ACCT_TYPE_INCOME:
    case ACCT_TYPE_EXPENSE:
        reg_type = INCOME_LEDGER;
        break;

    case ACCT_TYPE_EQUITY:
    case ACCT_TYPE_TRADING:
        reg_type = GENERAL_JOURNAL;
        break;

    default:
        PERR ("unknown account type:%d", account_type);
        reg_type = GENERAL_JOURNAL;
        break;
    }

    return reg_type;
}

/* Returns a boolean of whether this display should be single or double lined
 * mode by default */
gboolean
gnc_ledger_display_default_double_line (GNCLedgerDisplay* gld)
{
    return (gld->use_double_line_default ||
            gnc_prefs_get_bool (GNC_PREFS_GROUP_GENERAL_REGISTER,
                                GNC_PREF_DOUBLE_LINE_MODE));
}

/* Opens up a register window to display a single account */
GNCLedgerDisplay*
gnc_ledger_display_simple (Account* account)
{
    SplitRegisterType reg_type;
    GNCAccountType acc_type = xaccAccountGetType (account);
    gboolean use_double_line;
    GNCLedgerDisplay* ld;

    ENTER ("account=%p", account);

    switch (acc_type)
    {
    case ACCT_TYPE_PAYABLE:
    case ACCT_TYPE_RECEIVABLE:
        use_double_line = TRUE;
        break;
    default:
        use_double_line = FALSE;
        break;
    }

    reg_type = gnc_get_reg_type (account, LD_SINGLE);

    ld = gnc_ledger_display_internal (account, NULL, LD_SINGLE, reg_type,
                                      gnc_get_default_register_style (acc_type),
                                      use_double_line, FALSE, FALSE);
    LEAVE ("%p", ld);
    return ld;
}

/* Opens up a register window to display an account, and all of its
 *   children, in the same window */
GNCLedgerDisplay*
gnc_ledger_display_subaccounts (Account* account,
                                gboolean mismatched_commodities)
{
    SplitRegisterType reg_type;
    GNCLedgerDisplay* ld;

    ENTER ("account=%p", account);

    reg_type = gnc_get_reg_type (account, LD_SUBACCOUNT);

    ld = gnc_ledger_display_internal (account, NULL, LD_SUBACCOUNT,
                                      reg_type, REG_STYLE_JOURNAL, FALSE,
                                      FALSE, mismatched_commodities);
    LEAVE ("%p", ld);
    return ld;
}

/* Opens up a general journal window. */
GNCLedgerDisplay*
gnc_ledger_display_gl (void)
{
    Query* query;
    time64 start;
    struct tm tm;
    GNCLedgerDisplay* ld;
    GHashTable *exclude_template_accounts_hash;

    ENTER (" ");

    query = qof_query_create_for (GNC_ID_SPLIT);

    qof_query_set_book (query, gnc_get_current_book());

    exclude_template_accounts_hash = g_hash_table_new (g_direct_hash, g_direct_equal);

    /* In lieu of not "mis-using" some portion of the infrastructure by writing
     * a bunch of new code, we just filter out the accounts of the template
     * transactions.  While these are in a separate Account trees just for this
     * reason, the query engine makes no distinction between Account trees.
     * See Gnome Bug 86302.
     *         -- jsled */
    // Exclude any template accounts for search register and gl
     exclude_template_accounts (query, exclude_template_accounts_hash);

    gnc_tm_get_today_start (&tm);
    tm.tm_mon--; /* Default the register to the last month's worth of transactions. */
    start = gnc_mktime (&tm);
    xaccQueryAddDateMatchTT (query,
                             TRUE, start,
                             FALSE, 0,
                             QOF_QUERY_AND);

    ld = gnc_ledger_display_internal (NULL, query, LD_GL, GENERAL_JOURNAL,
                                      REG_STYLE_JOURNAL, FALSE, FALSE, FALSE);

    ld->excluded_template_acc_hash = exclude_template_accounts_hash;
    LEAVE ("%p", ld);

    qof_query_destroy (query);
    return ld;
}

/**
 * @param id: The string version of the GncGUID of the context of template
 * transaction being edited in this template GL.  As used by scheduled
 * transactions, this is the GncGUID of the SX itself which is magically the
 * *name* of the (template) account which contains the transactions for this
 * scheduled transaction.  That's right.  The stringified GncGUID of the SX is
 * the name of the SX'es template account.
 **/
GNCLedgerDisplay*
gnc_ledger_display_template_gl (char* id)
{
    QofBook* book;
    Query* q;
    GNCLedgerDisplay* ld;
    SplitRegister* sr;
    Account* root, *acct;
    gboolean isTemplateModeTrue;

    ENTER ("id=%s", id ? id : "(null)");

    acct = NULL;
    isTemplateModeTrue = TRUE;

    q = qof_query_create_for (GNC_ID_SPLIT);

    book = gnc_get_current_book();
    qof_query_set_book (q, book);

    if (id != NULL)
    {
        root = gnc_book_get_template_root (book);
        acct = gnc_account_lookup_by_name (root, id);
        g_assert (acct);
        xaccQueryAddSingleAccountMatch (q, acct, QOF_QUERY_AND);
    }

    ld = gnc_ledger_display_internal (NULL, q, LD_GL,
                                      SEARCH_LEDGER,
                                      REG_STYLE_JOURNAL,
                                      FALSE,
                                      isTemplateModeTrue,
                                      FALSE);

    sr = gnc_ledger_display_get_split_register (ld);
    if (acct)
    {
        gnc_split_register_set_template_account (sr, acct);
    }

    qof_query_destroy (q);

    LEAVE ("%p", ld);
    return ld;
}

GtkWidget*
gnc_ledger_display_get_parent (GNCLedgerDisplay* ld)
{
    if (ld == NULL)
        return NULL;

    if (ld->get_parent == NULL)
        return NULL;

    return ld->get_parent (ld);
}

static GtkWidget*
gnc_ledger_display_parent (void* user_data)
{
    GNCLedgerDisplay* ld = user_data;
    return gnc_ledger_display_get_parent (ld);
}

static void
gnc_ledger_display_set_watches (GNCLedgerDisplay* ld, GList* splits)
{
    GList* node;

    gnc_gui_component_clear_watches (ld->component_id);

    gnc_gui_component_watch_entity_type (ld->component_id,
                                         GNC_ID_ACCOUNT,
                                         QOF_EVENT_MODIFY | QOF_EVENT_DESTROY
                                         | GNC_EVENT_ITEM_CHANGED);

    for (node = splits; node; node = node->next)
    {
        Split* split = node->data;
        Transaction* trans = xaccSplitGetParent (split);

        gnc_gui_component_watch_entity (ld->component_id,
                                        xaccTransGetGUID (trans),
                                        QOF_EVENT_MODIFY);
    }
}

static void
refresh_handler (GHashTable* changes, gpointer user_data)
{
    GNCLedgerDisplay* ld = user_data;
    const EventInfo* info;
    gboolean has_leader;

    ENTER ("changes=%p, user_data=%p", changes, user_data);

    if (ld->loading)
    {
        LEAVE ("already loading");
        return;
    }

    has_leader = (ld->ld_type == LD_SINGLE || ld->ld_type == LD_SUBACCOUNT);

    if (has_leader)
    {
        Account* leader = gnc_ledger_display_leader (ld);
        if (!leader)
        {
            gnc_close_gui_component (ld->component_id);
            LEAVE ("no leader");
            return;
        }
    }

    if (changes && has_leader)
    {
        info = gnc_gui_get_entity_events (changes, &ld->leader);
        if (info && (info->event_mask & QOF_EVENT_DESTROY))
        {
            gnc_close_gui_component (ld->component_id);
            LEAVE ("destroy");
            return;
        }
    }

    if (ld->visible)
    {
        DEBUG ("immediate refresh because ledger is visible");
        gnc_ledger_display_refresh (ld);
    }
    else
    {
        ld->needs_refresh = TRUE;
    }
    LEAVE (" ");
}

static void
close_handler (gpointer user_data)
{
    GNCLedgerDisplay* ld = user_data;

    if (!ld)
        return;

    gnc_unregister_gui_component (ld->component_id);
    ld->component_id = NO_COMPONENT;

    if (ld->destroy)
        ld->destroy (ld);

    gnc_split_register_destroy (ld->reg);
    ld->reg = NULL;

    // Destroy the excluded template account hash
    if (ld->excluded_template_acc_hash)
        g_hash_table_destroy (ld->excluded_template_acc_hash);

    qof_query_destroy (ld->query);
    ld->query = NULL;

    g_free (ld);
}

static void
gnc_ledger_display_make_query (GNCLedgerDisplay* ld,
                               gint limit,
                               SplitRegisterType type)
{
    Account* leader;
    GList* accounts;

    if (!ld)
        return;

    switch (ld->ld_type)
    {
    case LD_SINGLE:
    case LD_SUBACCOUNT:
        break;

    case LD_GL:
        return;

    default:
        PERR ("unknown ledger type: %d", ld->ld_type);
        return;
    }

    qof_query_destroy (ld->query);
    ld->query = qof_query_create_for (GNC_ID_SPLIT);

    /* This is a bit of a hack. The number of splits should be
     * configurable, or maybe we should go back a time range instead
     * of picking a number, or maybe we should be able to exclude
     * based on reconciled status. Anyway, this works for now. */
    if ((limit != 0) && (type != SEARCH_LEDGER))
        qof_query_set_max_results (ld->query, limit);

    qof_query_set_book (ld->query, gnc_get_current_book());

    leader = gnc_ledger_display_leader (ld);

    /* if this is a subaccount ledger, record the number of
     * subaccounts so we can determine if the query needs
     * recreating on a refresh. */
    if (ld->ld_type == LD_SUBACCOUNT)
    {
        accounts = gnc_account_get_descendants (leader);
        ld->number_of_subaccounts = g_list_length (accounts);
    }
    else
        accounts = NULL;

    accounts = g_list_prepend (accounts, leader);

    xaccQueryAddAccountMatch (ld->query, accounts,
                              QOF_GUID_MATCH_ANY, QOF_QUERY_AND);

    g_list_free (accounts);
}

/* Opens up a ledger window for an arbitrary query. */
GNCLedgerDisplay*
gnc_ledger_display_query (Query* query, SplitRegisterType type,
                          SplitRegisterStyle style)
{
    GNCLedgerDisplay* ld;

    ENTER ("query=%p", query);

    ld = gnc_ledger_display_internal (NULL, query, LD_GL, type, style,
                                      FALSE, FALSE, FALSE);

    ld->excluded_template_acc_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
    LEAVE ("%p", ld);
    return ld;
}

static GNCLedgerDisplay*
gnc_ledger_display_internal (Account* lead_account, Query* q,
                             GNCLedgerDisplayType ld_type,
                             SplitRegisterType reg_type,
                             SplitRegisterStyle style,
                             gboolean use_double_line,
                             gboolean is_template,
                             gboolean mismatched_commodities)
{
    GNCLedgerDisplay* ld;
    gint limit;
    const char* klass;

    switch (ld_type)
    {
    case LD_SINGLE:
        klass = REGISTER_SINGLE_CM_CLASS;

        if (reg_type >= NUM_SINGLE_REGISTER_TYPES)
        {
            PERR ("single-account register with wrong split register type");
            return NULL;
        }

        if (!lead_account)
        {
            PERR ("single-account register with no account specified");
            return NULL;
        }

        if (q)
        {
            PWARN ("single-account register with external query");
            q = NULL;
        }

        ld = gnc_find_first_gui_component (klass, find_by_leader, lead_account);
        if (ld)
            return ld;

        break;

    case LD_SUBACCOUNT:
        klass = REGISTER_SUBACCOUNT_CM_CLASS;

        if (!lead_account)
        {
            PERR ("sub-account register with no lead account");
            return NULL;
        }

        if (q)
        {
            PWARN ("account register with external query");
            q = NULL;
        }

        ld = gnc_find_first_gui_component (klass, find_by_leader, lead_account);
        if (ld)
            return ld;

        break;

    case LD_GL:
        klass = REGISTER_GL_CM_CLASS;

        if (!q)
        {
            PWARN ("general journal with no query");
        }

        break;

    default:
        PERR ("bad ledger type: %d", ld_type);
        return NULL;

    }

    ld = g_new (GNCLedgerDisplay, 1);

    ld->leader = *xaccAccountGetGUID (lead_account);
    ld->query = NULL;
    ld->ld_type = ld_type;
    ld->loading = FALSE;
    ld->visible = FALSE;
    ld->needs_refresh = TRUE;
    ld->destroy = NULL;
    ld->get_parent = NULL;
    ld->user_data = NULL;
    ld->excluded_template_acc_hash = NULL;

    limit = gnc_prefs_get_float (GNC_PREFS_GROUP_GENERAL_REGISTER,
                                 GNC_PREF_MAX_TRANS);

    /* set up the query filter */
    if (q)
        ld->query = qof_query_copy (q);
    else
        gnc_ledger_display_make_query (ld, limit, reg_type);

    ld->component_id = gnc_register_gui_component (klass,
                                                   refresh_handler,
                                                   close_handler, ld);

    /******************************************************************\
     * The main register window itself                                *
    \******************************************************************/

    ld->use_double_line_default = use_double_line;

    ld->reg = gnc_split_register_new (reg_type, style, use_double_line,
                                      is_template, mismatched_commodities);

    gnc_split_register_set_data (ld->reg, ld, gnc_ledger_display_parent);

    /* Must call this before gnc_table_realize_gui() gets called or all the
     * combo boxes will be empty. Use an empty list of splits instad of running
     * the query when we're not in focus yet.
     */
    ld->loading = TRUE;
    gnc_split_register_load (ld->reg, NULL, gnc_ledger_display_leader (ld));
    ld->loading = FALSE;
    return ld;
}

void
gnc_ledger_display_set_query (GNCLedgerDisplay* ledger_display, Query* q)
{
    if (!ledger_display || !q)
        return;

    g_return_if_fail (ledger_display->ld_type == LD_GL);

    qof_query_destroy (ledger_display->query);
    ledger_display->query = qof_query_copy (q);
}

GNCLedgerDisplay*
gnc_ledger_display_find_by_query (Query* q)
{
    if (!q)
        return NULL;

    return gnc_find_first_gui_component (REGISTER_GL_CM_CLASS, find_by_query, q);
}

/********************************************************************\
 * refresh only the indicated register window                       *
\********************************************************************/

static void
gnc_ledger_display_refresh_internal (GNCLedgerDisplay* ld)
{
    GList* splits;

    if (ld->loading)
        return;

    /* It's not clear if we should re-run the query, or if we should
     * just use qof_query_last_run().  It's possible that the dates
     * changed, requiring a full new query.  Similar considerations
     * needed for multi-user mode.
     */
    splits = qof_query_run (ld->query);

    gnc_ledger_display_set_watches (ld, splits);

    if (!gnc_split_register_full_refresh_ok (ld->reg))
        return;

    ld->loading = TRUE;

    gnc_split_register_load (ld->reg, splits,
                             gnc_ledger_display_leader (ld));

    ld->needs_refresh = FALSE;
    ld->loading = FALSE;
}

void
gnc_ledger_display_refresh (GNCLedgerDisplay* ld)
{
    ENTER ("ld=%p", ld);

    if (!ld)
    {
        LEAVE ("no display");
        return;
    }

    if (ld->loading)
    {
        LEAVE ("already loading");
        return;
    }

    /* if subaccount ledger, check to see if still the same number
     * of subaccounts, if not recreate the query. */
    if (ld->ld_type == LD_SUBACCOUNT)
    {
        Account* leader = gnc_ledger_display_leader (ld);
        GList* accounts = gnc_account_get_descendants (leader);

        if (g_list_length (accounts) != ld->number_of_subaccounts)
            gnc_ledger_display_make_query (ld,
                                        gnc_prefs_get_float (GNC_PREFS_GROUP_GENERAL_REGISTER, GNC_PREF_MAX_TRANS),
                                        gnc_get_reg_type (leader, ld->ld_type));

        g_list_free (accounts);
    }

    /* In lieu of not "mis-using" some portion of the infrastructure by writing
     * a bunch of new code, we just filter out the accounts of the template
     * transactions.  While these are in a separate Account trees just for this
     * reason, the query engine makes no distinction between Account trees.
     * See Gnome Bug 86302.
     *         -- jsled */
    // Exclude any template accounts for search register and gl
    if (!ld->reg->is_template && (ld->reg->type == SEARCH_LEDGER || ld->ld_type == LD_GL))
        exclude_template_accounts (ld->query, ld->excluded_template_acc_hash);

    gnc_ledger_display_refresh_internal (ld);
    LEAVE (" ");
}

void gnc_ledger_display_set_focus (GNCLedgerDisplay* ld, gboolean focus)
{
    if (!ld)
        return;

    ld->visible = focus;

    if (ld->visible && ld->needs_refresh)
    {
        DEBUG ("deferred refresh because ledger is now visible");
        gnc_ledger_display_refresh (ld);
    }
}

void
gnc_ledger_display_refresh_by_split_register (SplitRegister* reg)
{
    GNCLedgerDisplay* ld;

    if (!reg)
        return;

    ld = gnc_find_first_gui_component (REGISTER_SINGLE_CM_CLASS,
                                       find_by_reg, reg);
    if (ld)
    {
        gnc_ledger_display_refresh (ld);
        return;
    }

    ld = gnc_find_first_gui_component (REGISTER_SUBACCOUNT_CM_CLASS,
                                       find_by_reg, reg);
    if (ld)
    {
        gnc_ledger_display_refresh (ld);
        return;
    }

    ld = gnc_find_first_gui_component (REGISTER_GL_CM_CLASS,
                                       find_by_reg, reg);
    if (ld)
    {
        gnc_ledger_display_refresh (ld);
        return;
    }

    ld = gnc_find_first_gui_component (REGISTER_TEMPLATE_CM_CLASS,
                                       find_by_reg, reg);
    if (ld)
    {
        gnc_ledger_display_refresh (ld);
    }
}

void
gnc_ledger_display_close (GNCLedgerDisplay* ld)
{
    if (!ld)
        return;

    gnc_close_gui_component (ld->component_id);
}