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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-table-selection-model.c: a Table Selection Model
*
* Author:
* Miguel de Icaza (miguel@gnu.org)
*
* (C) 1999 Helix Code, Inc.
*/
#include <config.h>
#include <gtk/gtksignal.h>
#include "e-table-selection-model.h"
#include "e-util/e-util.h"
#define ETSM_CLASS(e) ((ETableSelectionModelClass *)((GtkObject *)e)->klass)
#define PARENT_TYPE gtk_object_get_type ()
static GtkObjectClass *e_table_selection_model_parent_class;
enum {
SELECTION_MODEL_CHANGED,
GROUP_SELECTION_CHANGED,
LAST_SIGNAL
};
static guint e_table_selection_model_signals [LAST_SIGNAL] = { 0, };
static void
model_changed(ETableModel *etm, ETableSelectionModel *etsm)
{
g_free(etsm->selection);
etsm->selection = NULL;
etsm->row_count = -1;
}
static void
model_row_inserted(ETableModel *etm, int row, ETableSelectionModel *etsm)
{
int box;
int i;
int offset;
if(etsm->row_count >= 0) {
guint32 bitmask1 = 0xffff;
guint32 bitmask2;
/* Add another word if needed. */
if ((etsm->row_count & 0x1f) == 0) {
etsm->selection = g_realloc(etsm->selection, (etsm->row_count >> 5) + 1);
etsm->selection[etsm->row_count >> 5] = 0;
}
/* The box is the word that our row is in. */
box = row >> 5;
/* Shift all words to the right of our box right one bit. */
for (i = etsm->row_count >> 5; i > box; i--) {
etsm->selection[i] = (etsm->selection[i] >> 1) | (etsm->selection[i - 1] << 31);
}
/* Build bitmasks for the left and right half of the box */
offset = row & 0x1f;
bitmask1 = bitmask1 << (32 - offset);
bitmask2 = ~bitmask1;
/* Shift right half of box one bit to the right. */
etsm->selection[box] = (etsm->selection[box] & bitmask1) | ((etsm->selection[box] & bitmask2) >> 1);
etsm->row_count ++;
}
}
static void
model_row_deleted(ETableModel *etm, int row, ETableSelectionModel *etsm)
{
int box;
int i;
int last;
int offset;
if(etsm->row_count >= 0) {
guint32 bitmask1 = 0xffff;
guint32 bitmask2;
box = row >> 5;
last = etsm->row_count >> 5;
/* Build bitmasks for the left and right half of the box */
offset = row & 0x1f;
bitmask1 = bitmask1 << (32 - offset);
bitmask2 = (~bitmask1) >> 1;
/* Shift right half of box one bit to the left. */
etsm->selection[box] = (etsm->selection[box] & bitmask1) | ((etsm->selection[box] & bitmask2) << 1);
/* Shift all words to the right of our box left one bit. */
if (box < last) {
etsm->selection[box] &= etsm->selection[box + 1] >> 31;
for (i = box + 1; i < last; i++) {
etsm->selection[i] = (etsm->selection[i] << 1) | (etsm->selection[i + 1] >> 31);
}
etsm->selection[i] = etsm->selection[i] << 1;
}
etsm->row_count --;
/* Remove the last word if not needed. */
if ((etsm->row_count & 0x1f) == 0) {
etsm->selection = g_realloc(etsm->selection, etsm->row_count >> 5);
}
}
}
inline static void
add_model(ETableSelectionModel *etsm, ETableModel *model)
{
etsm->model = model;
if (model) {
gtk_object_ref(GTK_OBJECT(model));
etsm->model_changed_id = gtk_signal_connect(GTK_OBJECT(model), "model_changed",
GTK_SIGNAL_FUNC(model_changed), etsm);
etsm->model_row_inserted_id = gtk_signal_connect(GTK_OBJECT(model), "model_row_inserted",
GTK_SIGNAL_FUNC(model_row_inserted), etsm);
etsm->model_row_deleted_id = gtk_signal_connect(GTK_OBJECT(model), "model_row_deleted",
GTK_SIGNAL_FUNC(model_row_deleted), etsm);
}
}
inline static void
drop_model(ETableSelectionModel *etsm)
{
if (etsm->model) {
gtk_signal_disconnect(GTK_OBJECT(etsm->model),
etsm->model_changed_id);
gtk_signal_disconnect(GTK_OBJECT(etsm->model),
etsm->model_row_inserted_id);
gtk_signal_disconnect(GTK_OBJECT(etsm->model),
etsm->model_row_deleted_id);
gtk_object_unref(GTK_OBJECT(etsm->model));
}
etsm->model = NULL;
}
static void
etsm_destroy (GtkObject *object)
{
ETableSelectionModel *etsm;
etsm = E_TABLE_SELECTION_MODEL (object);
g_free(etsm->selection);
}
static void
e_table_selection_model_init (ETableSelectionModel *selection)
{
selection->selection = NULL;
selection->row_count = -1;
}
static void
e_table_selection_model_class_init (ETableSelectionModelClass *klass)
{
GtkObjectClass *object_class;
e_table_selection_model_parent_class = gtk_type_class (gtk_object_get_type ());
object_class = GTK_OBJECT_CLASS(klass);
object_class->destroy = etsm_destroy;
#if 0
e_table_selection_model_signals [SELECTION_MODEL_CHANGED] =
gtk_signal_new ("selection_model_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ETableSelectionModelClass, selection_model_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
e_table_selection_model_signals [GROUP_SELECTION_CHANGED] =
gtk_signal_new ("group_selection_changed",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (ETableSelectionModelClass, group_selection_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
klass->selection_model_changed = NULL;
klass->group_selection_changed = NULL;
#endif
gtk_object_class_add_signals (object_class, e_table_selection_model_signals, LAST_SIGNAL);
}
E_MAKE_TYPE(e_table_selection_model, "ETableSelectionModel", ETableSelectionModel,
e_table_selection_model_class_init, e_table_selection_model_init, PARENT_TYPE);
ETableSelectionModel *
e_table_selection_model_new (void)
{
return gtk_type_new (e_table_selection_model_get_type ());
}
gboolean
e_table_selection_model_is_row_selected (ETableSelectionModel *selection,
int n)
{
if (selection->row_count < n)
return 0;
else
return ((selection->selection[n / 32]) >> (31 - (n % 32))) & 0x1;
}
GList *
e_table_selection_model_get_selection_list (ETableSelectionModel *selection)
{
int i;
GList *list = NULL;
if (selection->row_count < 0)
return NULL;
for (i = selection->row_count / 32; i >= 0; i--) {
if (selection->selection[i]) {
int j;
guint32 value = selection->selection[i];
for (j = 31; j >= 0; j--) {
if (value & 0x1) {
list = g_list_prepend(list, (void *) (i * 32 + j));
}
value >>= 1;
}
}
}
return NULL;
}
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