path: root/widgets/table/e-table-subset-variable.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-table-subset.c: Implements a table that contains a subset of another table.
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * (C) 1999 Helix Code, Inc.
 */
#include <config.h>
#include <stdlib.h>
#include <gtk/gtksignal.h>
#include <string.h>
#include "e-util/e-util.h"
#include "e-table-subset-variable.h"

#define ETSSV_CLASS(e) ((ETableSubsetVariableClass *)((GtkObject *)e)->klass)

#define PARENT_TYPE E_TABLE_SUBSET_TYPE

#define INCREMENT_AMOUNT 10

static ETableSubsetClass *etssv_parent_class;

static void
etssv_add       (ETableSubsetVariable *etssv,
         gint                  row)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    
    e_table_model_pre_change(etm);

    if (etss->n_map + 1 > etssv->n_vals_allocated){
        etss->map_table = g_realloc (etss->map_table, (etssv->n_vals_allocated + INCREMENT_AMOUNT) * sizeof(int));
        etssv->n_vals_allocated += INCREMENT_AMOUNT;
    }

    etss->map_table[etss->n_map++] = row;

    e_table_model_row_inserted (etm, etss->n_map - 1);
}

static void
etssv_add_all   (ETableSubsetVariable *etssv)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    int rows;
    int i;

    e_table_model_pre_change(etm);
    
    rows = e_table_model_row_count(etss->source);
    if (etss->n_map + rows > etssv->n_vals_allocated){
        etssv->n_vals_allocated += MAX(INCREMENT_AMOUNT, rows);
        etss->map_table = g_realloc (etss->map_table, etssv->n_vals_allocated * sizeof(int));
    }
    for (i = 0; i < rows; i++)
        etss->map_table[etss->n_map++] = i;

    e_table_model_changed (etm);
}

static gboolean
etssv_remove    (ETableSubsetVariable *etssv,
         gint                  row)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    int i;
    
    for (i = 0; i < etss->n_map; i++){
        if (etss->map_table[i] == row) {
            e_table_model_pre_change (etm);
            memmove (etss->map_table + i, etss->map_table + i + 1, (etss->n_map - i - 1) * sizeof(int));
            etss->n_map --;
            
            e_table_model_row_deleted (etm, i);
            return TRUE;
        }
    }
    return FALSE;
}

static void
etssv_class_init (GtkObjectClass *object_class)
{
    ETableSubsetVariableClass *klass = E_TABLE_SUBSET_VARIABLE_CLASS(object_class);
    etssv_parent_class = gtk_type_class (PARENT_TYPE);

    klass->add     = etssv_add;
    klass->add_all = etssv_add_all;
    klass->remove  = etssv_remove;
}

E_MAKE_TYPE(e_table_subset_variable, "ETableSubsetVariable", ETableSubsetVariable, etssv_class_init, NULL, PARENT_TYPE);

ETableModel *
e_table_subset_variable_construct (ETableSubsetVariable *etssv,
                   ETableModel          *source)
{
    if (e_table_subset_construct (E_TABLE_SUBSET(etssv), source, 1) == NULL)
        return NULL;
    E_TABLE_SUBSET(etssv)->n_map = 0;

    return E_TABLE_MODEL (etssv);
}

ETableModel *
e_table_subset_variable_new (ETableModel *source)
{
    ETableSubsetVariable *etssv = gtk_type_new (E_TABLE_SUBSET_VARIABLE_TYPE);

    if (e_table_subset_variable_construct (etssv, source) == NULL){
        gtk_object_destroy (GTK_OBJECT (etssv));
        return NULL;
    }

    return (ETableModel *) etssv;
}

void
e_table_subset_variable_add       (ETableSubsetVariable *etssv,
                   gint                  row)
{
    g_return_if_fail (etssv != NULL);
    g_return_if_fail (E_IS_TABLE_SUBSET_VARIABLE(etssv));

    if (ETSSV_CLASS(etssv)->add)
        ETSSV_CLASS (etssv)->add (etssv, row);
}

void
e_table_subset_variable_add_all   (ETableSubsetVariable *etssv)
{
    g_return_if_fail (etssv != NULL);
    g_return_if_fail (E_IS_TABLE_SUBSET_VARIABLE(etssv));

    if (ETSSV_CLASS(etssv)->add_all)
        ETSSV_CLASS (etssv)->add_all (etssv);
}

gboolean
e_table_subset_variable_remove    (ETableSubsetVariable *etssv,
                   gint                  row)
{
    g_return_val_if_fail (etssv != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_SUBSET_VARIABLE(etssv), FALSE);

    if (ETSSV_CLASS(etssv)->remove)
        return ETSSV_CLASS (etssv)->remove (etssv, row);
    else
        return FALSE;
}

void
e_table_subset_variable_increment (ETableSubsetVariable *etssv,
                   gint                  position,
                   gint                  amount)
{
    int i;
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    for (i = 0; i < etss->n_map; i++) {
        if (etss->map_table[i] > position)
            etss->map_table[i] += amount;
    }
}

void
e_table_subset_variable_decrement (ETableSubsetVariable *etssv,
                   gint                  position,
                   gint                  amount)
{
    int i;
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    for (i = 0; i < etss->n_map; i++) {
        if (etss->map_table[i] > position)
            etss->map_table[i] -= amount;
    }
}

void
e_table_subset_variable_set_allocation (ETableSubsetVariable *etssv,
                    gint total)
{
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    if (total <= 0)
        total = 1;
    if (total > etss->n_map){
        etss->map_table = g_realloc (etss->map_table, total * sizeof(int));
    }
}