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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-table-sorted.c: Implements a table that sorts 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-sorted-variable.h"

#define PARENT_TYPE E_TABLE_SUBSET_VARIABLE_TYPE

#define INCREMENT_AMOUNT 100

static ETableSubsetVariableClass *etsv_parent_class;

static void etsv_proxy_model_changed      (ETableModel *etm, ETableSortedVariable *etsv);
static void etsv_proxy_model_row_changed  (ETableModel *etm, int row, ETableSortedVariable *etsv);
static void etsv_proxy_model_cell_changed (ETableModel *etm, int col, int row, ETableSortedVariable *etsv);
static void etsv_sort_info_changed        (ETableSortInfo *info, ETableSortedVariable *etsv);
static void etsv_sort                     (ETableSortedVariable *etsv);
static void etsv_add                      (ETableSubsetVariable *etssv, gint                  row);
static void etsv_add_all                  (ETableSubsetVariable *etssv);

static void
etsv_destroy (GtkObject *object)
{
    ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE (object);
    ETableSubset *etss = E_TABLE_SUBSET (object);

    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_changed_id);
    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_row_changed_id);
    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_cell_changed_id);
    gtk_signal_disconnect (GTK_OBJECT (etsv->sort_info),
                   etsv->sort_info_changed_id);

    if (etsv->sort_idle_id) {
        g_source_remove(etsv->sort_idle_id);
    }

    etsv->table_model_changed_id = 0;
    etsv->table_model_row_changed_id = 0;
    etsv->table_model_cell_changed_id = 0;
    
    if (etsv->sort_info)
        gtk_object_unref(GTK_OBJECT(etsv->sort_info));
    if (etsv->full_header)
        gtk_object_unref(GTK_OBJECT(etsv->full_header));

    GTK_OBJECT_CLASS (etsv_parent_class)->destroy (object);
}

static void
etsv_class_init (GtkObjectClass *object_class)
{
    ETableSubsetVariableClass *etssv_class = E_TABLE_SUBSET_VARIABLE_CLASS(object_class);

    etsv_parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = etsv_destroy;

    etssv_class->add = etsv_add;
    etssv_class->add_all = etsv_add_all;
}

static void
etsv_init (ETableSortedVariable *etsv)
{
    etsv->full_header = NULL;
    etsv->sort_info = NULL;

    etsv->table_model_changed_id = 0;
    etsv->table_model_row_changed_id = 0;
    etsv->table_model_cell_changed_id = 0;
    etsv->sort_info_changed_id = 0;

    etsv->sort_idle_id = 0;
}

E_MAKE_TYPE(e_table_sorted_variable, "ETableSortedVariable", ETableSortedVariable, etsv_class_init, etsv_init, PARENT_TYPE);

static gboolean
etsv_sort_idle(ETableSortedVariable *etsv)
{
    gtk_object_ref(GTK_OBJECT(etsv));
    etsv_sort(etsv);
    etsv->sort_idle_id = 0;
    gtk_object_unref(GTK_OBJECT(etsv));
    return FALSE;
}

/* This takes source rows. */
static int
etsv_compare(ETableSortedVariable *etsv, int row1, int row2)
{
    int j;
    int sort_count = e_table_sort_info_sorting_get_count(etsv->sort_info);
    int comp_val = 0;
    int ascending = 1;
    ETableSubset *etss = E_TABLE_SUBSET(etsv);

    for (j = 0; j < sort_count; j++) {
        ETableSortColumn column = e_table_sort_info_sorting_get_nth(etsv->sort_info, j);
        ETableCol *col;
        if (column.column > e_table_header_count (etsv->full_header))
            col = e_table_header_get_column (etsv->full_header, e_table_header_count (etsv->full_header) - 1);
        else
            col = e_table_header_get_column (etsv->full_header, column.column);
        comp_val = (*col->compare)(e_table_model_value_at (etss->source, col->col_idx, row1),
                       e_table_model_value_at (etss->source, col->col_idx, row2));
        ascending = column.ascending;
        if (comp_val != 0)
            break;
    }
    if (comp_val == 0) {
        if (row1 < row2)
            comp_val = -1;
        if (row1 > row2)
            comp_val = 1;
    }
    if (!ascending)
        comp_val = -comp_val;
    return comp_val;
}


static void
etsv_add       (ETableSubsetVariable *etssv,
        gint                  row)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE (etssv);
    int i;
    
    if (etss->n_map + 1 > etssv->n_vals_allocated) {
        etssv->n_vals_allocated += INCREMENT_AMOUNT;
        etss->map_table = g_realloc (etss->map_table, (etssv->n_vals_allocated) * sizeof(int));
    }
    if (row < e_table_model_row_count(etss->source) - 1)
        for ( i = 0; i < etss->n_map; i++ )
            if (etss->map_table[i] >= row)
                etss->map_table[i] ++;
    i = etss->n_map;
    if (etsv->sort_idle_id == 0) {
        i = 0;
        while (i < etss->n_map && etsv_compare(etsv, etss->map_table[i], row) < 0)
            i++;
        memmove(etss->map_table + i + 1, etss->map_table + i, (etss->n_map - i) * sizeof(int));
    }
    etss->map_table[i] = row;
    etss->n_map++;

    e_table_model_row_inserted (etm, i);
}

static void
etsv_add_all   (ETableSubsetVariable *etssv)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE (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;

    if (etsv->sort_idle_id == 0) {
        etsv->sort_idle_id = g_idle_add_full(50, (GSourceFunc) etsv_sort_idle, etsv, NULL);
    }

    e_table_model_changed (etm);
}

ETableModel *
e_table_sorted_variable_new (ETableModel *source, ETableHeader *full_header, ETableSortInfo *sort_info)
{
    ETableSortedVariable *etsv = gtk_type_new (E_TABLE_SORTED_VARIABLE_TYPE);
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE (etsv);

    if (e_table_subset_variable_construct (etssv, source) == NULL){
        gtk_object_destroy (GTK_OBJECT (etsv));
        return NULL;
    }
    
    etsv->sort_info = sort_info;
    gtk_object_ref(GTK_OBJECT(etsv->sort_info));
    etsv->full_header = full_header;
    gtk_object_ref(GTK_OBJECT(etsv->full_header));

    etsv->table_model_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_changed",
                               GTK_SIGNAL_FUNC (etsv_proxy_model_changed), etsv);
    etsv->table_model_row_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_row_changed",
                                   GTK_SIGNAL_FUNC (etsv_proxy_model_row_changed), etsv);
    etsv->table_model_cell_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_cell_changed",
                                GTK_SIGNAL_FUNC (etsv_proxy_model_cell_changed), etsv);
    etsv->sort_info_changed_id = gtk_signal_connect (GTK_OBJECT (sort_info), "sort_info_changed",
                             GTK_SIGNAL_FUNC (etsv_sort_info_changed), etsv);
    
    return E_TABLE_MODEL(etsv);
}

static void
etsv_proxy_model_changed (ETableModel *etm, ETableSortedVariable *etsv)
{
    /* FIXME: do_resort (); */
}

static void
etsv_proxy_model_row_changed (ETableModel *etm, int row, ETableSortedVariable *etsv)
{
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE(etsv);

    if (e_table_subset_variable_remove(etssv, row))
        e_table_subset_variable_add (etssv, row);
}

static void
etsv_proxy_model_cell_changed (ETableModel *etm, int col, int row, ETableSortedVariable *etsv)
{
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE(etsv);

    if (e_table_subset_variable_remove(etssv, row))
        e_table_subset_variable_add (etssv, row);
}

static void
etsv_sort_info_changed (ETableSortInfo *info, ETableSortedVariable *etsv)
{
    etsv_sort(etsv);
}

static ETableSortedVariable *etsv_closure;
void **vals_closure;
int cols_closure;
int *ascending_closure;
GCompareFunc *compare_closure;

/* FIXME: Make it not cache the second and later columns (as if anyone cares.) */

static int
qsort_callback(const void *data1, const void *data2)
{
    gint row1 = *(int *)data1;
    gint row2 = *(int *)data2;
    int j;
    int sort_count = e_table_sort_info_sorting_get_count(etsv_closure->sort_info);
    int comp_val = 0;
    int ascending = 1;
    for (j = 0; j < sort_count; j++) {
        comp_val = (*(compare_closure[j]))(vals_closure[cols_closure * row1 + j], vals_closure[cols_closure * row2 + j]);
        ascending = ascending_closure[j];
        if (comp_val != 0)
            break;
    }
    if (comp_val == 0) {
        if (row1 < row2)
            comp_val = -1;
        if (row1 > row2)
            comp_val = 1;
    }
    if (!ascending)
        comp_val = -comp_val;
    return comp_val;
}


static void
etsv_sort(ETableSortedVariable *etsv)
{
    ETableSubset *etss = E_TABLE_SUBSET(etsv);
    static int reentering = 0;
    int rows = E_TABLE_SUBSET(etsv)->n_map;
    int total_rows;
    int i;
    int j;
    int cols;
    if (reentering)
        return;
    reentering = 1;

    e_table_model_pre_change(E_TABLE_MODEL(etsv));

    total_rows = e_table_model_row_count(E_TABLE_SUBSET(etsv)->source);
    cols = e_table_sort_info_sorting_get_count(etsv->sort_info);
    cols_closure = cols;
    etsv_closure = etsv;
    vals_closure = g_new(void *, total_rows * cols);
    ascending_closure = g_new(int, cols);
    compare_closure = g_new(GCompareFunc, cols);
    for (j = 0; j < cols; j++) {
        ETableSortColumn column = e_table_sort_info_sorting_get_nth(etsv->sort_info, j);
        ETableCol *col;
        if (column.column > e_table_header_count (etsv->full_header))
            col = e_table_header_get_column (etsv->full_header, e_table_header_count (etsv->full_header) - 1);
        else
            col = e_table_header_get_column (etsv->full_header, column.column);
        for (i = 0; i < rows; i++) {
#if 0
            if( !(i & 0xff) ) {
                while(gtk_events_pending())
                    gtk_main_iteration();
            }
#endif
            vals_closure[E_TABLE_SUBSET(etsv)->map_table[i] * cols + j] = e_table_model_value_at (etss->source, col->col_idx, E_TABLE_SUBSET(etsv)->map_table[i]);
        }
        compare_closure[j] = col->compare;
        ascending_closure[j] = column.ascending;
    }
    qsort(E_TABLE_SUBSET(etsv)->map_table, rows, sizeof(int), qsort_callback);
    g_free(vals_closure);
    g_free(ascending_closure);
    g_free(compare_closure);
    e_table_model_changed (E_TABLE_MODEL(etsv));
    reentering = 0;
}