path: root/e-util/e-table-memory-store.c

/*
 * This program 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) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <string.h>

#include "e-table-memory-store.h"

#define E_TABLE_MEMORY_STORE_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_TABLE_MEMORY_STORE, ETableMemoryStorePrivate))

#define STORE_LOCATOR(etms, col, row) (*((etms)->priv->store + (row) * (etms)->priv->col_count + (col)))

struct _ETableMemoryStorePrivate {
    gint col_count;
    ETableMemoryStoreColumnInfo *columns;
    gpointer *store;
};

/* Forward Declarations */
static void e_table_memory_store_table_model_init
                    (ETableModelInterface *interface);

G_DEFINE_TYPE_WITH_CODE (
    ETableMemoryStore,
    e_table_memory_store,
    E_TYPE_TABLE_MEMORY,
    G_IMPLEMENT_INTERFACE (
        E_TYPE_TABLE_MODEL,
        e_table_memory_store_table_model_init))

static gpointer
duplicate_value (ETableMemoryStore *etms,
                 gint col,
                 gconstpointer val)
{
    switch (etms->priv->columns[col].type) {
    case E_TABLE_MEMORY_STORE_COLUMN_TYPE_STRING:
        return g_strdup (val);
    case E_TABLE_MEMORY_STORE_COLUMN_TYPE_PIXBUF:
        if (val)
            g_object_ref ((gpointer) val);
        return (gpointer) val;
    default:
        break;
    }
    return (gpointer) val;
}

static void
free_value (ETableMemoryStore *etms,
            gint col,
            gpointer value)
{
    switch (etms->priv->columns[col].type) {
    case E_TABLE_MEMORY_STORE_COLUMN_TYPE_STRING:
        g_free (value);
        break;
    case E_TABLE_MEMORY_STORE_COLUMN_TYPE_PIXBUF:
        if (value)
            g_object_unref (value);
        break;
    default:
        break;
    }
}

static void
table_memory_store_finalize (GObject *object)
{
    ETableMemoryStorePrivate *priv;

    priv = E_TABLE_MEMORY_STORE_GET_PRIVATE (object);

    e_table_memory_store_clear (E_TABLE_MEMORY_STORE (object));

    g_free (priv->columns);
    g_free (priv->store);

    /* Chain up to parent's finalize() method. */
    G_OBJECT_CLASS (e_table_memory_store_parent_class)->finalize (object);
}

static gint
table_memory_store_column_count (ETableModel *etm)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    return etms->priv->col_count;
}

static void
table_memory_store_append_row (ETableModel *etm,
                               ETableModel *source,
                               gint row)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);
    gpointer *new_data;
    gint i;
    gint row_count;

    new_data = g_new (gpointer , etms->priv->col_count);

    for (i = 0; i < etms->priv->col_count; i++) {
        new_data[i] = e_table_model_value_at (source, i, row);
    }

    row_count = e_table_model_row_count (E_TABLE_MODEL (etms));

    e_table_memory_store_insert_array (etms, row_count, new_data, NULL);
}

static gpointer
table_memory_store_value_at (ETableModel *etm,
                             gint col,
                             gint row)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    return STORE_LOCATOR (etms, col, row);
}

static void
table_memory_store_set_value_at (ETableModel *etm,
                                 gint col,
                                 gint row,
                                 gconstpointer val)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    e_table_model_pre_change (etm);

    STORE_LOCATOR (etms, col, row) = duplicate_value (etms, col, val);

    e_table_model_cell_changed (etm, col, row);
}

static gboolean
table_memory_store_is_cell_editable (ETableModel *etm,
                                     gint col,
                                     gint row)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    return etms->priv->columns[col].editable;
}

/* The default for duplicate_value() is to return the raw value. */
static gpointer
table_memory_store_duplicate_value (ETableModel *etm,
                                    gint col,
                                    gconstpointer value)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    return duplicate_value (etms, col, value);
}

static void
table_memory_store_free_value (ETableModel *etm,
                               gint col,
                               gpointer value)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    free_value (etms, col, value);
}

static gpointer
table_memory_store_initialize_value (ETableModel *etm,
                                     gint col)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    switch (etms->priv->columns[col].type) {
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_STRING:
            return g_strdup ("");
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_PIXBUF:
            return NULL;
        default:
            break;
    }
    return NULL;
}

static gboolean
table_memory_store_value_is_empty (ETableModel *etm,
                                   gint col,
                                   gconstpointer value)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    switch (etms->priv->columns[col].type) {
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_STRING:
            return !(value && *(gchar *) value);
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_PIXBUF:
            return value == NULL;
        default:
            break;
    }
    return value == NULL;
}

static gchar *
table_memory_store_value_to_string (ETableModel *etm,
                                    gint col,
                                    gconstpointer value)
{
    ETableMemoryStore *etms = E_TABLE_MEMORY_STORE (etm);

    switch (etms->priv->columns[col].type) {
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_STRING:
            return g_strdup (value);
        case E_TABLE_MEMORY_STORE_COLUMN_TYPE_PIXBUF:
            return g_strdup ("");
        default:
            break;
    }
    return g_strdup_printf ("%d", GPOINTER_TO_INT (value));
}

static void
e_table_memory_store_class_init (ETableMemoryStoreClass *class)
{
    GObjectClass *object_class;

    g_type_class_add_private (class, sizeof (ETableMemoryStorePrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = table_memory_store_finalize;
}

static void
e_table_memory_store_table_model_init (ETableModelInterface *interface)
{
    interface->column_count = table_memory_store_column_count;
    interface->append_row = table_memory_store_append_row;

    interface->value_at = table_memory_store_value_at;
    interface->set_value_at = table_memory_store_set_value_at;
    interface->is_cell_editable = table_memory_store_is_cell_editable;

    interface->duplicate_value = table_memory_store_duplicate_value;
    interface->free_value = table_memory_store_free_value;
    interface->initialize_value = table_memory_store_initialize_value;
    interface->value_is_empty = table_memory_store_value_is_empty;
    interface->value_to_string = table_memory_store_value_to_string;
}

static void
e_table_memory_store_init (ETableMemoryStore *etms)
{
    etms->priv = E_TABLE_MEMORY_STORE_GET_PRIVATE (etms);
}

/**
 * e_table_memory_store_new:
 * @columns:
 *
 * This initializes a new ETableMemoryStoreModel object.  ETableMemoryStoreModel is
 * an implementaiton of the abstract class ETableModel.  The ETableMemoryStoreModel
 * is designed to allow people to easily create ETableModels without having
 * to create a new GType derived from ETableModel every time they need one.
 *
 * Instead, ETableMemoryStoreModel uses a setup based in callback functions, every
 * callback function signature mimics the signature of each ETableModel method
 * and passes the extra @data pointer to each one of the method to provide them
 * with any context they might want to use.
 *
 * Returns: An ETableMemoryStoreModel object (which is also an ETableModel
 * object).
 */
ETableModel *
e_table_memory_store_new (ETableMemoryStoreColumnInfo *columns)
{
    ETableMemoryStore *et = g_object_new (E_TYPE_TABLE_MEMORY_STORE, NULL);

    if (e_table_memory_store_construct (et, columns)) {
        return (ETableModel *) et;
    } else {
        g_object_unref (et);
        return NULL;
    }
}

ETableModel *
e_table_memory_store_construct (ETableMemoryStore *etms,
                                ETableMemoryStoreColumnInfo *columns)
{
    gint i;
    for (i = 0; columns[i].type != E_TABLE_MEMORY_STORE_COLUMN_TYPE_TERMINATOR; i++)
        /* Intentionally blank */;
    etms->priv->col_count = i;

    etms->priv->columns = g_new (ETableMemoryStoreColumnInfo, etms->priv->col_count + 1);

    memcpy (etms->priv->columns, columns, (etms->priv->col_count + 1) * sizeof (ETableMemoryStoreColumnInfo));

    return E_TABLE_MODEL (etms);
}

void
e_table_memory_store_adopt_value_at (ETableMemoryStore *etms,
                                     gint col,
                                     gint row,
                                     gpointer value)
{
    e_table_model_pre_change (E_TABLE_MODEL (etms));

    STORE_LOCATOR (etms, col, row) = value;

    e_table_model_cell_changed (E_TABLE_MODEL (etms), col, row);
}

/* The size of these arrays is the number of columns. */
void
e_table_memory_store_insert_array (ETableMemoryStore *etms,
                                   gint row,
                                   gpointer *store,
                                   gpointer data)
{
    gint row_count;
    gint i;

    row_count = e_table_model_row_count (E_TABLE_MODEL (etms)) + 1;
    if (row == -1)
        row = row_count - 1;
    etms->priv->store = g_realloc (etms->priv->store, etms->priv->col_count * row_count * sizeof (gpointer));
    memmove (
        etms->priv->store + etms->priv->col_count * (row + 1),
        etms->priv->store + etms->priv->col_count * row,
        etms->priv->col_count * (row_count - row - 1) * sizeof (gpointer));

    for (i = 0; i < etms->priv->col_count; i++) {
        STORE_LOCATOR (etms, i, row) = duplicate_value (etms, i, store[i]);
    }

    e_table_memory_insert (E_TABLE_MEMORY (etms), row, data);
}

void
e_table_memory_store_insert (ETableMemoryStore *etms,
                             gint row,
                             gpointer data,
                             ...)
{
    gpointer *store;
    va_list args;
    gint i;

    store = g_new (gpointer , etms->priv->col_count + 1);

    va_start (args, data);
    for (i = 0; i < etms->priv->col_count; i++) {
        store[i] = va_arg (args, gpointer);
    }
    va_end (args);

    e_table_memory_store_insert_array (etms, row, store, data);

    g_free (store);
}

void
e_table_memory_store_insert_adopt_array (ETableMemoryStore *etms,
                                         gint row,
                                         gpointer *store,
                                         gpointer data)
{
    gint row_count;
    gint i;

    row_count = e_table_model_row_count (E_TABLE_MODEL (etms)) + 1;
    if (row == -1)
        row = row_count - 1;
    etms->priv->store = g_realloc (etms->priv->store, etms->priv->col_count * row_count * sizeof (gpointer));
    memmove (
        etms->priv->store + etms->priv->col_count * (row + 1),
        etms->priv->store + etms->priv->col_count * row,
        etms->priv->col_count * (row_count - row - 1) * sizeof (gpointer));

    for (i = 0; i < etms->priv->col_count; i++) {
        STORE_LOCATOR (etms, i, row) = store[i];
    }

    e_table_memory_insert (E_TABLE_MEMORY (etms), row, data);
}

void
e_table_memory_store_insert_adopt (ETableMemoryStore *etms,
                                   gint row,
                                   gpointer data,
                                   ...)
{
    gpointer *store;
    va_list args;
    gint i;

    store = g_new (gpointer , etms->priv->col_count + 1);

    va_start (args, data);
    for (i = 0; i < etms->priv->col_count; i++) {
        store[i] = va_arg (args, gpointer);
    }
    va_end (args);

    e_table_memory_store_insert_adopt_array (etms, row, store, data);

    g_free (store);
}

/**
 * e_table_memory_store_change_array:
 * @etms: the ETabelMemoryStore.
 * @row:  the row we're changing.
 * @store: an array of new values to fill the row
 * @data: the new closure to associate with this row.
 *
 * frees existing values associated with a row and replaces them with
 * duplicates of the values in store.
 *
 */
void
e_table_memory_store_change_array (ETableMemoryStore *etms,
                                   gint row,
                                   gpointer *store,
                                   gpointer data)
{
    gint i;

    g_return_if_fail (row >= 0 && row < e_table_model_row_count (E_TABLE_MODEL (etms)));

    e_table_model_pre_change (E_TABLE_MODEL (etms));

    for (i = 0; i < etms->priv->col_count; i++) {
        free_value (etms, i, STORE_LOCATOR (etms, i, row));
        STORE_LOCATOR (etms, i, row) = duplicate_value (etms, i, store[i]);
    }

    e_table_memory_set_data (E_TABLE_MEMORY (etms), row, data);
    e_table_model_row_changed (E_TABLE_MODEL (etms), row);
}

/**
 * e_table_memory_store_change:
 * @etms: the ETabelMemoryStore.
 * @row:  the row we're changing.
 * @data: the new closure to associate with this row.
 *
 * a varargs version of e_table_memory_store_change_array.  you must
 * pass in etms->col_count args.
 */
void
e_table_memory_store_change (ETableMemoryStore *etms,
                             gint row,
                             gpointer data,
                             ...)
{
    gpointer *store;
    va_list args;
    gint i;

    g_return_if_fail (row >= 0 && row < e_table_model_row_count (E_TABLE_MODEL (etms)));

    store = g_new0 (gpointer , etms->priv->col_count + 1);

    va_start (args, data);
    for (i = 0; i < etms->priv->col_count; i++) {
        store[i] = va_arg (args, gpointer);
    }
    va_end (args);

    e_table_memory_store_change_array (etms, row, store, data);

    g_free (store);
}

/**
 * e_table_memory_store_change_adopt_array:
 * @etms: the ETableMemoryStore
 * @row: the row we're changing.
 * @store: an array of new values to fill the row
 * @data: the new closure to associate with this row.
 *
 * frees existing values for the row and stores the values from store
 * into it.  This function differs from
 * e_table_memory_storage_change_adopt_array in that it does not
 * duplicate the data.
 */
void
e_table_memory_store_change_adopt_array (ETableMemoryStore *etms,
                                         gint row,
                                         gpointer *store,
                                         gpointer data)
{
    gint i;

    g_return_if_fail (row >= 0 && row < e_table_model_row_count (E_TABLE_MODEL (etms)));

    for (i = 0; i < etms->priv->col_count; i++) {
        free_value (etms, i, STORE_LOCATOR (etms, i, row));
        STORE_LOCATOR (etms, i, row) = store[i];
    }

    e_table_memory_set_data (E_TABLE_MEMORY (etms), row, data);
    e_table_model_row_changed (E_TABLE_MODEL (etms), row);
}

/**
 * e_table_memory_store_change_adopt
 * @etms: the ETabelMemoryStore.
 * @row:  the row we're changing.
 * @data: the new closure to associate with this row.
 *
 * a varargs version of e_table_memory_store_change_adopt_array.  you
 * must pass in etms->col_count args.
 */
void
e_table_memory_store_change_adopt (ETableMemoryStore *etms,
                                   gint row,
                                   gpointer data,
                                   ...)
{
    gpointer *store;
    va_list args;
    gint i;

    g_return_if_fail (row >= 0 && row < e_table_model_row_count (E_TABLE_MODEL (etms)));

    store = g_new0 (gpointer , etms->priv->col_count + 1);

    va_start (args, data);
    for (i = 0; i < etms->priv->col_count; i++) {
        store[i] = va_arg (args, gpointer);
    }
    va_end (args);

    e_table_memory_store_change_adopt_array (etms, row, store, data);

    g_free (store);
}

void
e_table_memory_store_remove (ETableMemoryStore *etms,
                             gint row)
{
    ETableModel *model;
    gint column_count, row_count;
    gint i;

    model = E_TABLE_MODEL (etms);
    column_count = e_table_model_column_count (model);

    for (i = 0; i < column_count; i++)
        e_table_model_free_value (model, i, e_table_model_value_at (model, i, row));

    row_count = e_table_model_row_count (E_TABLE_MODEL (etms)) - 1;
    memmove (
        etms->priv->store + etms->priv->col_count * row,
        etms->priv->store + etms->priv->col_count * (row + 1),
        etms->priv->col_count * (row_count - row) * sizeof (gpointer));
    etms->priv->store = g_realloc (etms->priv->store, etms->priv->col_count * row_count * sizeof (gpointer));

    e_table_memory_remove (E_TABLE_MEMORY (etms), row);
}

void
e_table_memory_store_clear (ETableMemoryStore *etms)
{
    ETableModel *model;
    gint row_count, column_count;
    gint i, j;

    model = E_TABLE_MODEL (etms);
    row_count = e_table_model_row_count (model);
    column_count = e_table_model_column_count (model);

    for (i = 0; i < row_count; i++) {
        for (j = 0; j < column_count; j++) {
            e_table_model_free_value (model, j, e_table_model_value_at (model, j, i));
        }
    }

    e_table_memory_clear (E_TABLE_MEMORY (etms));

    g_free (etms->priv->store);
    etms->priv->store = NULL;
}