/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* e-selection-model-array.c: a Selection Model
*
* Author:
* Christopher James Lahey <clahey@ximian.com>
*
* (C) 2000, 2001 Ximian, Inc.
*/
#include <config.h>
#include <gtk/gtksignal.h>
#include "e-selection-model-array.h"
#include "gal/util/e-util.h"
#include <gdk/gdkkeysyms.h>
#define ESMA_CLASS(e) ((ESelectionModelArrayClass *)((GtkObject *)e)->klass)
#define PARENT_TYPE e_selection_model_get_type ()
#define ONES ((guint32) 0xffffffff)
#define BOX(n) ((n) / 32)
#define OFFSET(n) (31 - ((n) % 32))
#define BITMASK(n) ((guint32)(((guint32) 0x1) << OFFSET((n))))
#define BITMASK_LEFT(n) ((((n) % 32) == 0) ? 0 : (ONES << (32 - ((n) % 32))))
#define BITMASK_RIGHT(n) ((guint32)(((guint32) ONES) >> ((n) % 32)))
static ESelectionModelClass *parent_class;
enum {
ARG_0,
ARG_CURSOR_ROW,
ARG_CURSOR_COL,
};
void
e_selection_model_array_confirm_row_count(ESelectionModelArray *esma)
{
if (esma->row_count < 0) {
esma->row_count = e_selection_model_array_get_row_count(esma);
g_free(esma->selection);
esma->selection = g_new0(gint, (esma->row_count + 31) / 32);
}
}
static void
e_selection_model_array_insert_row_real(ESelectionModelArray *esma, int row)
{
int box;
int i;
if(esma->row_count >= 0) {
/* Add another word if needed. */
if ((esma->row_count & 0x1f) == 0) {
esma->selection = g_renew(gint, esma->selection, (esma->row_count >> 5) + 1);
esma->selection[esma->row_count >> 5] = 0;
}
/* The box is the word that our row is in. */
box = BOX(row);
/* Shift all words to the right of our box right one bit. */
for (i = esma->row_count >> 5; i > box; i--) {
esma->selection[i] = (esma->selection[i] >> 1) | (esma->selection[i - 1] << 31);
}
/* Shift right half of box one bit to the right. */
esma->selection[box] = (esma->selection[box] & BITMASK_LEFT(row)) | ((esma->selection[box] & BITMASK_RIGHT(row)) >> 1);
esma->row_count ++;
}
if (esma->cursor_row >= row)
esma->cursor_row ++;
}
static void
e_selection_model_array_delete_row_real(ESelectionModelArray *esma, int row)
{
int box;
int i;
int last;
int selected = FALSE;
if(esma->row_count >= 0) {
guint32 bitmask;
box = row >> 5;
last = esma->row_count >> 5;
/* Build bitmasks for the left and right half of the box */
bitmask = BITMASK_RIGHT(row) >> 1;
selected = e_selection_model_is_row_selected(E_SELECTION_MODEL(esma), row);
/* Shift right half of box one bit to the left. */
esma->selection[box] = (esma->selection[box] & BITMASK_LEFT(row))| ((esma->selection[box] & bitmask) << 1);
/* Shift all words to the right of our box left one bit. */
if (box < last) {
esma->selection[box] &= esma->selection[box + 1] >> 31;
for (i = box + 1; i < last; i++) {
esma->selection[i] = (esma->selection[i] << 1) | (esma->selection[i + 1] >> 31);
}
/* this over-runs our memory! */
/*esma->selection[i] = esma->selection[i] << 1; */
}
esma->row_count --;
/* Remove the last word if not needed. */
if ((esma->row_count & 0x1f) == 0) {
esma->selection = g_renew(gint, esma->selection, esma->row_count >> 5);
}
if (selected && E_SELECTION_MODEL(esma)->mode == GTK_SELECTION_SINGLE) {
e_selection_model_select_single_row (E_SELECTION_MODEL(esma), row > 0 ? row - 1 : 0);
}
}
if (esma->cursor_row >= row && esma->cursor_row > 0)
esma->cursor_row --;
}
/* FIXME : Improve efficiency here. */
void
e_selection_model_array_delete_rows(ESelectionModelArray *esma, int row, int count)
{
int i;
for (i = 0; i < count; i++)
e_selection_model_array_delete_row_real(esma, row);
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
e_selection_model_cursor_changed(E_SELECTION_MODEL(esma), esma->cursor_row, esma->cursor_col);
}
/* FIXME : Improve efficiency here. */
void
e_selection_model_array_insert_rows(ESelectionModelArray *esma, int row, int count)
{
int i;
for (i = 0; i < count; i++)
e_selection_model_array_insert_row_real(esma, row);
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
e_selection_model_cursor_changed(E_SELECTION_MODEL(esma), esma->cursor_row, esma->cursor_col);
}
/* FIXME: Implement this more efficiently. */
void
e_selection_model_array_move_row(ESelectionModelArray *esma, int old_row, int new_row)
{
ESelectionModel *esm = E_SELECTION_MODEL(esma);
gint selected = e_selection_model_is_row_selected(esm, old_row);
gint cursor = esma->cursor_row == old_row;
e_selection_model_array_delete_row_real(esma, old_row);
e_selection_model_array_insert_row_real(esma, new_row);
if (selected) {
if (esm->mode == GTK_SELECTION_SINGLE)
e_selection_model_select_single_row (esm, new_row);
else
e_selection_model_change_one_row(esm, new_row, TRUE);
}
if (cursor) {
esma->cursor_row = new_row;
}
e_selection_model_selection_changed(esm);
e_selection_model_cursor_changed(esm, esma->cursor_row, esma->cursor_col);
}
static void
esma_destroy (GtkObject *object)
{
ESelectionModelArray *esma;
esma = E_SELECTION_MODEL_ARRAY (object);
g_free(esma->selection);
}
static void
esma_get_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY (o);
switch (arg_id){
case ARG_CURSOR_ROW:
GTK_VALUE_INT(*arg) = esma->cursor_row;
break;
case ARG_CURSOR_COL:
GTK_VALUE_INT(*arg) = esma->cursor_col;
break;
}
}
static void
esma_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
ESelectionModel *esm = E_SELECTION_MODEL (o);
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY (o);
switch (arg_id){
case ARG_CURSOR_ROW:
e_selection_model_do_something(esm, GTK_VALUE_INT(*arg), esma->cursor_col, 0);
break;
case ARG_CURSOR_COL:
e_selection_model_do_something(esm, esma->cursor_row, GTK_VALUE_INT(*arg), 0);
break;
}
}
/**
* e_selection_model_is_row_selected
* @selection: #ESelectionModel to check
* @n: The row to check
*
* This routine calculates whether the given row is selected.
*
* Returns: %TRUE if the given row is selected
*/
static gboolean
esma_is_row_selected (ESelectionModel *selection,
gint n)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
if (esma->row_count < n || esma->row_count == 0)
return 0;
else
return (esma->selection[BOX(n)] >> OFFSET(n)) & 0x1;
}
/**
* e_selection_model_foreach
* @selection: #ESelectionModel to traverse
* @callback: The callback function to call back.
* @closure: The closure
*
* This routine calls the given callback function once for each
* selected row, passing closure as the closure.
*/
static void
esma_foreach (ESelectionModel *selection,
EForeachFunc callback,
gpointer closure)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
int i;
int last = (esma->row_count + 31) / 32;
for (i = 0; i < last; i++) {
if (esma->selection[i]) {
int j;
guint32 value = esma->selection[i];
for (j = 0; j < 32; j++) {
if (value & 0x80000000) {
callback(i * 32 + j, closure);
}
value <<= 1;
}
}
}
}
/**
* e_selection_model_clear
* @selection: #ESelectionModel to clear
*
* This routine clears the selection to no rows selected.
*/
static void
esma_clear(ESelectionModel *selection)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
g_free(esma->selection);
esma->selection = NULL;
esma->row_count = -1;
esma->cursor_row = -1;
esma->cursor_col = -1;
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
e_selection_model_cursor_changed(E_SELECTION_MODEL(esma), -1, -1);
}
#define PART(x,n) (((x) & (0x01010101 << n)) >> n)
#define SECTION(x, n) (((x) >> (n * 8)) & 0xff)
/**
* e_selection_model_selected_count
* @selection: #ESelectionModel to count
*
* This routine calculates the number of rows selected.
*
* Returns: The number of rows selected in the given model.
*/
static gint
esma_selected_count (ESelectionModel *selection)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
gint count;
int i;
int last;
if (!esma->selection)
return 0;
count = 0;
last = BOX(esma->row_count - 1);
for (i = 0; i <= last; i++) {
int j;
guint32 thiscount = 0;
for (j = 0; j < 8; j++)
thiscount += PART(esma->selection[i], j);
for (j = 0; j < 4; j++)
count += SECTION(thiscount, j);
}
return count;
}
/**
* e_selection_model_select_all
* @selection: #ESelectionModel to select all
*
* This routine selects all the rows in the given
* #ESelectionModel.
*/
static void
esma_select_all (ESelectionModel *selection)
{
int i;
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
e_selection_model_array_confirm_row_count(esma);
if (!esma->selection)
esma->selection = g_new0 (gint, (esma->row_count + 31) / 32);
for (i = 0; i < (esma->row_count + 31) / 32; i ++) {
esma->selection[i] = ONES;
}
/* need to zero out the bits corresponding to the rows not
selected in the last full 32 bit mask */
if (esma->row_count % 32) {
int unselected_mask = 0;
int num_unselected_in_last_byte = 32 - esma->row_count % 32;
for (i = 0; i < num_unselected_in_last_byte; i ++)
unselected_mask |= 1 << i;
esma->selection[(esma->row_count + 31) / 32 - 1] &= ~unselected_mask;
}
esma->cursor_col = 0;
esma->cursor_row = 0;
esma->selection_start_row = 0;
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
e_selection_model_cursor_changed(E_SELECTION_MODEL(esma), 0, 0);
}
/**
* e_selection_model_invert_selection
* @selection: #ESelectionModel to invert
*
* This routine inverts all the rows in the given
* #ESelectionModel.
*/
static void
esma_invert_selection (ESelectionModel *selection)
{
int i;
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
e_selection_model_array_confirm_row_count(esma);
if (!esma->selection)
esma->selection = g_new0 (gint, (esma->row_count + 31) / 32);
for (i = 0; i < (esma->row_count + 31) / 32; i ++) {
esma->selection[i] = ~esma->selection[i];
}
esma->cursor_col = -1;
esma->cursor_row = -1;
esma->selection_start_row = 0;
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
e_selection_model_cursor_changed(E_SELECTION_MODEL(esma), -1, -1);
}
static int
esma_row_count (ESelectionModel *selection)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
e_selection_model_array_confirm_row_count(esma);
return esma->row_count;
}
#define OPERATE(object, i,mask,grow) ((grow) ? (((object)->selection[(i)]) |= ((guint32) ~(mask))) : (((object)->selection[(i)]) &= (mask)))
static void
esma_change_one_row(ESelectionModel *selection, int row, gboolean grow)
{
int i;
i = BOX(row);
OPERATE(E_SELECTION_MODEL_ARRAY(selection), i, ~BITMASK(row), grow);
}
static void
esma_change_cursor (ESelectionModel *selection, int row, int col)
{
ESelectionModelArray *esma;
g_return_if_fail(selection != NULL);
g_return_if_fail(E_IS_SELECTION_MODEL(selection));
esma = E_SELECTION_MODEL_ARRAY(selection);
esma->cursor_row = row;
esma->cursor_col = col;
}
static void
esma_change_range(ESelectionModel *selection, int start, int end, gboolean grow)
{
int i, last;
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
if (start != end) {
if (selection->sorter && e_sorter_needs_sorting(selection->sorter)) {
for ( i = start; i < end; i++) {
e_selection_model_change_one_row(selection, e_sorter_sorted_to_model(selection->sorter, i), grow);
}
} else {
i = BOX(start);
last = BOX(end);
if (i == last) {
OPERATE(esma, i, BITMASK_LEFT(start) | BITMASK_RIGHT(end), grow);
} else {
OPERATE(esma, i, BITMASK_LEFT(start), grow);
if (grow)
for (i ++; i < last; i++)
esma->selection[i] = ONES;
else
for (i ++; i < last; i++)
esma->selection[i] = 0;
OPERATE(esma, i, BITMASK_RIGHT(end), grow);
}
}
}
}
static int
esma_cursor_row (ESelectionModel *selection)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
return esma->cursor_row;
}
static int
esma_cursor_col (ESelectionModel *selection)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
return esma->cursor_col;
}
static void
esma_select_single_row (ESelectionModel *selection, int row)
{
int i;
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
for (i = 0; i < ((esma->row_count + 31) / 32); i++) {
if (!((i == BOX(row) && esma->selection[i] == BITMASK(row)) ||
(i != BOX(row) && esma->selection[i] == 0))) {
g_free(esma->selection);
esma->selection = g_new0(gint, (esma->row_count + 31) / 32);
esma->selection[BOX(row)] = BITMASK(row);
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
break;
}
}
esma->selection_start_row = row;
}
static void
esma_toggle_single_row (ESelectionModel *selection, int row)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
if (esma->selection[BOX(row)] & BITMASK(row))
esma->selection[BOX(row)] &= ~BITMASK(row);
else
esma->selection[BOX(row)] |= BITMASK(row);
esma->selection_start_row = row;
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
}
static void
esma_move_selection_end (ESelectionModel *selection, int row)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
int old_start;
int old_end;
int new_start;
int new_end;
if (selection->sorter && e_sorter_needs_sorting(selection->sorter)) {
old_start = MIN (e_sorter_model_to_sorted(selection->sorter, esma->selection_start_row),
e_sorter_model_to_sorted(selection->sorter, esma->cursor_row));
old_end = MAX (e_sorter_model_to_sorted(selection->sorter, esma->selection_start_row),
e_sorter_model_to_sorted(selection->sorter, esma->cursor_row)) + 1;
new_start = MIN (e_sorter_model_to_sorted(selection->sorter, esma->selection_start_row),
e_sorter_model_to_sorted(selection->sorter, row));
new_end = MAX (e_sorter_model_to_sorted(selection->sorter, esma->selection_start_row),
e_sorter_model_to_sorted(selection->sorter, row)) + 1;
} else {
old_start = MIN (esma->selection_start_row, esma->cursor_row);
old_end = MAX (esma->selection_start_row, esma->cursor_row) + 1;
new_start = MIN (esma->selection_start_row, row);
new_end = MAX (esma->selection_start_row, row) + 1;
}
/* This wouldn't work nearly so smoothly if one end of the selection weren't held in place. */
if (old_start < new_start)
esma_change_range(selection, old_start, new_start, FALSE);
if (new_start < old_start)
esma_change_range(selection, new_start, old_start, TRUE);
if (old_end < new_end)
esma_change_range(selection, old_end, new_end, TRUE);
if (new_end < old_end)
esma_change_range(selection, new_end, old_end, FALSE);
e_selection_model_selection_changed(E_SELECTION_MODEL(esma));
}
static void
esma_set_selection_end (ESelectionModel *selection, int row)
{
ESelectionModelArray *esma = E_SELECTION_MODEL_ARRAY(selection);
esma_select_single_row(selection, esma->selection_start_row);
esma->cursor_row = esma->selection_start_row;
e_selection_model_move_selection_end(selection, row);
}
int
e_selection_model_array_get_row_count (ESelectionModelArray *esma)
{
g_return_val_if_fail(esma != NULL, 0);
g_return_val_if_fail(E_IS_SELECTION_MODEL_ARRAY(esma), 0);
if (ESMA_CLASS(esma)->get_row_count)
return ESMA_CLASS(esma)->get_row_count (esma);
else
return 0;
}
static void
e_selection_model_array_init (ESelectionModelArray *esma)
{
esma->selection = NULL;
esma->row_count = -1;
esma->selection_start_row = 0;
esma->cursor_row = -1;
esma->cursor_col = -1;
}
static void
e_selection_model_array_class_init (ESelectionModelArrayClass *klass)
{
GtkObjectClass *object_class;
ESelectionModelClass *esm_class;
parent_class = gtk_type_class (e_selection_model_get_type ());
object_class = GTK_OBJECT_CLASS(klass);
esm_class = E_SELECTION_MODEL_CLASS(klass);
object_class->destroy = esma_destroy;
object_class->get_arg = esma_get_arg;
object_class->set_arg = esma_set_arg;
esm_class->is_row_selected = esma_is_row_selected ;
esm_class->foreach = esma_foreach ;
esm_class->clear = esma_clear ;
esm_class->selected_count = esma_selected_count ;
esm_class->select_all = esma_select_all ;
esm_class->invert_selection = esma_invert_selection ;
esm_class->row_count = esma_row_count ;
esm_class->change_one_row = esma_change_one_row ;
esm_class->change_cursor = esma_change_cursor ;
esm_class->cursor_row = esma_cursor_row ;
esm_class->cursor_col = esma_cursor_col ;
esm_class->select_single_row = esma_select_single_row ;
esm_class->toggle_single_row = esma_toggle_single_row ;
esm_class->move_selection_end = esma_move_selection_end ;
esm_class->set_selection_end = esma_set_selection_end ;
klass->get_row_count = NULL ;
gtk_object_add_arg_type ("ESelectionModelArray::cursor_row", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_CURSOR_ROW);
gtk_object_add_arg_type ("ESelectionModelArray::cursor_col", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_CURSOR_COL);
}
E_MAKE_TYPE(e_selection_model_array, "ESelectionModelArray", ESelectionModelArray,
e_selection_model_array_class_init, e_selection_model_array_init, PARENT_TYPE);