sheet.c 21.6 KB
Newer Older
Arturo Espinosa's avatar
Arturo Espinosa committed
1 2 3 4 5 6 7 8
/*
 * Sheet.c:  Implements the sheet management and per-sheet storage
 * (C) 1998 The Free Software Foundation
 *
 * Author:
 *  Miguel de Icaza (miguel@gnu.org)
 *
 */
Arturo Espinosa's avatar
Arturo Espinosa committed
9 10 11 12
#include <gnome.h>
#include "gnumeric.h"
#include "gnumeric-sheet.h"

Arturo Espinosa's avatar
Arturo Espinosa committed
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
static void
sheet_redraw_all (Sheet *sheet)
{
	gnome_canvas_request_redraw (
		GNOME_CANVAS (sheet->sheet_view),
		0, 0, INT_MAX, INT_MAX);
}

static void
sheet_init_default_styles (Sheet *sheet)
{
	/* The default column style */
	sheet->default_col_style.pos        = -1;
	sheet->default_col_style.style      = style_new ();
	sheet->default_col_style.units      = 40;
	sheet->default_col_style.pixels     = 0;
	sheet->default_col_style.margin_a   = 0;
	sheet->default_col_style.margin_b   = 0;
	sheet->default_col_style.selected   = 0;
Arturo Espinosa's avatar
Arturo Espinosa committed
32
	sheet->default_col_style.data       = NULL;
Arturo Espinosa's avatar
Arturo Espinosa committed
33 34 35 36 37 38 39 40 41

	/* The default row style */
	sheet->default_row_style.pos      = -1;
	sheet->default_row_style.style    = style_new ();
	sheet->default_row_style.units    = 20;
	sheet->default_row_style.pixels   = 0;
	sheet->default_row_style.margin_a = 0;
	sheet->default_row_style.margin_b = 0;
	sheet->default_row_style.selected = 0;
Arturo Espinosa's avatar
Arturo Espinosa committed
42
	sheet->default_row_style.data     = NULL;
Arturo Espinosa's avatar
Arturo Espinosa committed
43 44 45
}

/* Initialize some of the columns and rows, to test the display engine */
46 47 48
static void
sheet_init_dummy_stuff (Sheet *sheet)
{
Arturo Espinosa's avatar
Arturo Espinosa committed
49
	ColRowInfo *cp, *rp;
50 51 52
	int x, y;

	for (x = 0; x < 40; x += 2){
Arturo Espinosa's avatar
Arturo Espinosa committed
53
		cp = sheet_row_new (sheet);
54 55
		cp->pos = x;
		cp->units = (x+1) * 30;
Arturo Espinosa's avatar
Arturo Espinosa committed
56
		sheet_col_add (sheet, cp);
57 58 59
	}

	for (y = 0; y < 6; y += 2){
Arturo Espinosa's avatar
Arturo Espinosa committed
60
		rp = sheet_row_new (sheet);
61 62
		rp->pos = y;
		rp->units = (20 * (y + 1));
63
		rp->selected = 0;
Arturo Espinosa's avatar
Arturo Espinosa committed
64
		sheet_row_add (sheet, rp);
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
	}
}

static GtkWidget *
new_canvas_bar (Sheet *sheet, GtkOrientation o, GnomeCanvasItem **itemp)
{
	GnomeCanvasGroup *group;
	GnomeCanvasItem *item;
	GtkWidget *canvas;
	int w, h;
	
	canvas = gnome_canvas_new (
		gtk_widget_get_default_visual (),
		gtk_widget_get_default_colormap ());

	if (o == GTK_ORIENTATION_VERTICAL){
		w = 60;
		h = 1;
	} else {
		w = 1;
		h = 20;
	}
	gnome_canvas_set_size (GNOME_CANVAS (canvas), w, h);
	group = GNOME_CANVAS_GROUP (GNOME_CANVAS (canvas)->root);
89
	item = gnome_canvas_item_new (group,
90 91 92 93 94
				      item_bar_get_type (),
				      "ItemBar::Sheet", sheet,
				      "ItemBar::Orientation", o,
				      "ItemBar::First", 0,
				      NULL);
Arturo Espinosa's avatar
Arturo Espinosa committed
95

96 97 98 99 100
	*itemp = GNOME_CANVAS_ITEM (item);
	gtk_widget_show (canvas);
	return canvas;
}

Arturo Espinosa's avatar
Arturo Espinosa committed
101 102 103 104 105 106 107 108 109 110
static void
sheet_col_selection_changed (ItemBar *item_bar, int column, Sheet *sheet)
{
	printf ("Sheet signal: Column %d selection changed\n", column);
}

static void
sheet_col_size_changed (ItemBar *item_bar, int col, int width, Sheet *sheet)
{
	sheet_col_set_width (sheet, col, width);
111
	gnumeric_sheet_compute_visible_ranges (GNUMERIC_SHEET (sheet->sheet_view));
Arturo Espinosa's avatar
Arturo Espinosa committed
112 113 114 115 116 117 118 119 120 121 122 123
}

static void
sheet_row_selection_changed (ItemBar *item_bar, int row, Sheet *sheet)
{
	printf ("Sheet signal: Row %d selection changed\n", row);
}

static void
sheet_row_size_changed (ItemBar *item_bar, int row, int height, Sheet *sheet)
{
	sheet_row_set_height (sheet, row, height);
124
	gnumeric_sheet_compute_visible_ranges (GNUMERIC_SHEET (sheet->sheet_view));
Arturo Espinosa's avatar
Arturo Espinosa committed
125 126
}

Arturo Espinosa's avatar
Arturo Espinosa committed
127 128 129 130
Sheet *
sheet_new (Workbook *wb, char *name)
{
	Sheet *sheet;
131
	int rows_shown, cols_shown;
Arturo Espinosa's avatar
Arturo Espinosa committed
132

133 134
	rows_shown = cols_shown = 40;
	
Arturo Espinosa's avatar
Arturo Espinosa committed
135 136 137
	sheet = g_new0 (Sheet, 1);
	sheet->parent_workbook = wb;
	sheet->name = g_strdup (name);
138 139
	sheet->last_zoom_factor_used = -1.0;
	sheet->toplevel = gtk_table_new (0, 0, 0);
140 141 142
	sheet->max_col_used = cols_shown;
	sheet->max_row_used = rows_shown;
	
Arturo Espinosa's avatar
Arturo Espinosa committed
143 144
	sheet_init_default_styles (sheet);
	
145 146
	/* Dummy initialization */
	sheet_init_dummy_stuff (sheet);
147 148

	/* Create the gnumeric sheet and set the initial selection */
Arturo Espinosa's avatar
Arturo Espinosa committed
149
	sheet->sheet_view = gnumeric_sheet_new (sheet);
150 151
	sheet_selection_append (sheet, 0, 0);
	
Arturo Espinosa's avatar
Arturo Espinosa committed
152
	gtk_widget_show (sheet->sheet_view);
153 154 155 156 157 158 159 160 161 162 163
	gtk_widget_show (sheet->toplevel);
	
	gtk_table_attach (GTK_TABLE (sheet->toplevel), sheet->sheet_view,
			  1, 2, 1, 2,
			  GTK_FILL | GTK_EXPAND, GTK_FILL | GTK_EXPAND, 0, 0);

	/* Column canvas */
	sheet->col_canvas = new_canvas_bar (sheet, GTK_ORIENTATION_HORIZONTAL, &sheet->col_item);
	gtk_table_attach (GTK_TABLE (sheet->toplevel), sheet->col_canvas,
			  1, 2, 0, 1,
			  GTK_FILL | GTK_EXPAND, 0, 0, 0);
Arturo Espinosa's avatar
Arturo Espinosa committed
164 165 166 167 168 169
	gtk_signal_connect (GTK_OBJECT (sheet->col_item), "selection_changed",
			    GTK_SIGNAL_FUNC (sheet_col_selection_changed),
			    sheet);
	gtk_signal_connect (GTK_OBJECT (sheet->col_item), "size_changed",
			    GTK_SIGNAL_FUNC (sheet_col_size_changed),
			    sheet);
170 171 172 173 174
	/* Row canvas */
	sheet->row_canvas = new_canvas_bar (sheet, GTK_ORIENTATION_VERTICAL, &sheet->row_item);
	gtk_table_attach (GTK_TABLE (sheet->toplevel), sheet->row_canvas,
			  0, 1, 1, 2,
			  0, GTK_FILL | GTK_EXPAND, 0, 0);
Arturo Espinosa's avatar
Arturo Espinosa committed
175 176 177 178 179 180
	gtk_signal_connect (GTK_OBJECT (sheet->row_item), "selection_changed",
			    GTK_SIGNAL_FUNC (sheet_row_selection_changed),
			    sheet);
	gtk_signal_connect (GTK_OBJECT (sheet->row_item), "size_changed",
			    GTK_SIGNAL_FUNC (sheet_row_size_changed),
			    sheet);
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197

	/* Scroll bars and their adjustments */
	sheet->va = gtk_adjustment_new (0.0, 0.0, sheet->max_row_used, 1.0, rows_shown, 1.0);
	sheet->ha = gtk_adjustment_new (0.0, 0.0, sheet->max_col_used, 1.0, cols_shown, 1.0);
	
	sheet->hs = gtk_hscrollbar_new (GTK_ADJUSTMENT (sheet->ha));
	sheet->vs = gtk_vscrollbar_new (GTK_ADJUSTMENT (sheet->va));

	/* Attach the horizontal scroll */
	gtk_table_attach (GTK_TABLE (sheet->toplevel), sheet->hs,
			  1, 2, 2, 3,
			  GTK_FILL | GTK_EXPAND, 0, 0, 0);

	/* Attach the vertical scroll */
	gtk_table_attach (GTK_TABLE (sheet->toplevel), sheet->vs,
			  2, 3, 1, 2,
			  0, GTK_FILL | GTK_EXPAND, 0, 0);
Arturo Espinosa's avatar
Arturo Espinosa committed
198
	
199
	sheet_set_zoom_factor (sheet, 1.0);
Arturo Espinosa's avatar
Arturo Espinosa committed
200 201 202
	return sheet;
}

203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
void
sheet_destroy (Sheet *sheet)
{
	g_assert (sheet != NULL);
	
	sheet_selection_clear (sheet);
	g_free (sheet->name);
	
	style_destroy (sheet->default_row_style.style);
	style_destroy (sheet->default_col_style.style);
	
	gtk_widget_destroy (sheet->toplevel);
	
	g_free (sheet);
}

219
void
220
sheet_foreach_col (Sheet *sheet, sheet_col_row_callback callback, void *user_data)
221 222 223 224 225 226 227 228 229 230 231 232 233 234
{
	GList *l = sheet->cols_info;

	/* Invoke the callback for the default style */
	(*callback)(sheet, &sheet->default_col_style, user_data);

	/* And then for the rest */
	while (l){
		(*callback)(sheet, l->data, user_data);
		l = l->next;
	}
}

void
235
sheet_foreach_row (Sheet *sheet, sheet_col_row_callback callback, void *user_data)
236 237 238 239 240 241 242 243 244 245 246 247 248 249
{
	GList *l = sheet->rows_info;

	/* Invoke the callback for the default style */
	(callback)(sheet, &sheet->default_row_style, user_data);

	/* And then for the rest */
	while (l){
		(*callback)(sheet, l->data, user_data);
		l = l->next;
	}
}

static void
250
sheet_compute_col_row_new_size (Sheet *sheet, ColRowInfo *ci, void *data)
251 252 253
{
	double pix_per_unit = sheet->last_zoom_factor_used;

254 255
	ci->pixels = (ci->units * pix_per_unit) +
		ci->margin_a + ci->margin_b + 1;
256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
}

/*
 * Updates the values used for display after a zoom change
 */
static void
sheet_reconfigure_zoom (Sheet *sheet)
{
	GnomeCanvas *gnumeric_canvas = GNOME_CANVAS (sheet->sheet_view);
	double pixels_per_unit = gnumeric_canvas->pixels_per_unit;
	
	if (pixels_per_unit == sheet->last_zoom_factor_used)
		return;

	sheet->last_zoom_factor_used = pixels_per_unit;
271 272
	sheet_foreach_col (sheet, sheet_compute_col_row_new_size, NULL);
	sheet_foreach_row (sheet, sheet_compute_col_row_new_size, NULL);
273 274 275 276 277 278 279 280 281 282 283 284 285 286
}

void
sheet_set_zoom_factor (Sheet *sheet, double factor)
{
	gnome_canvas_set_pixels_per_unit (GNOME_CANVAS (sheet->sheet_view), factor);
	gnome_canvas_set_pixels_per_unit (GNOME_CANVAS (sheet->col_canvas), factor);
	gnome_canvas_set_pixels_per_unit (GNOME_CANVAS (sheet->row_canvas), factor);
	sheet_reconfigure_zoom (sheet);
	gnome_canvas_scroll_to (GNOME_CANVAS (sheet->sheet_view), 0, 0);
	gnome_canvas_scroll_to (GNOME_CANVAS (sheet->col_canvas), 0, 0);
	gnome_canvas_scroll_to (GNOME_CANVAS (sheet->row_canvas), 0, 0);
}

287
ColRowInfo *
Arturo Espinosa's avatar
Arturo Espinosa committed
288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
sheet_duplicate_colrow (ColRowInfo *original)
{
	ColRowInfo *info = g_new (ColRowInfo, 1);

	*info = *original;
	
	info->style = style_duplicate (original->style);
	
	return info;
}

ColRowInfo *
sheet_row_new (Sheet *sheet)
{
	return sheet_duplicate_colrow (&sheet->default_row_style);
}

ColRowInfo *
sheet_col_new (Sheet *sheet)
{
	return sheet_duplicate_colrow (&sheet->default_col_style);
}


Arturo Espinosa's avatar
Arturo Espinosa committed
312 313 314 315 316 317 318 319 320
static gint
CRsort (gconstpointer a, gconstpointer b)
{
	ColRowInfo *ia = (ColRowInfo *) a;
	ColRowInfo *ib = (ColRowInfo *) b;

	return (ia->pos - ib->pos);
}

Arturo Espinosa's avatar
Arturo Espinosa committed
321 322 323
void
sheet_col_add (Sheet *sheet, ColRowInfo *cp)
{
Arturo Espinosa's avatar
Arturo Espinosa committed
324
	sheet->cols_info = g_list_insert_sorted (sheet->cols_info, cp, CRsort);
Arturo Espinosa's avatar
Arturo Espinosa committed
325 326 327 328 329
}

void
sheet_row_add (Sheet *sheet, ColRowInfo *rp)
{
Arturo Espinosa's avatar
Arturo Espinosa committed
330
	sheet->rows_info = g_list_insert_sorted (sheet->rows_info, rp, CRsort);
Arturo Espinosa's avatar
Arturo Espinosa committed
331 332 333 334
}

ColRowInfo *
sheet_col_get_info (Sheet *sheet, int col)
335
{
336
	GList *l = sheet->cols_info;
337

338
	for (; l; l = l->next){
339
		ColRowInfo *ci = l->data;
340

341
		if (ci->pos == col)
342 343 344 345
			return ci;
	}

	return &sheet->default_col_style;
346 347
}

348
ColRowInfo *
Arturo Espinosa's avatar
Arturo Espinosa committed
349
sheet_row_get_info (Sheet *sheet, int row)
350
{
351
	GList *l = sheet->rows_info;
352

353
	for (; l; l = l->next){
354
		ColRowInfo *ri = l->data;
355

356
		if (ri->pos == row)
357 358
			return ri;
	}
359

360
	return &sheet->default_row_style;
361 362
}

Arturo Espinosa's avatar
Arturo Espinosa committed
363 364 365 366 367 368
static void
colrow_set_units (Sheet *sheet,ColRowInfo *info)
{
	double pix = sheet->last_zoom_factor_used;
	
	info->units  = (info->pixels -
369
			(info->margin_a + info->margin_b + 1)) / pix;
Arturo Espinosa's avatar
Arturo Espinosa committed
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
}

void
sheet_row_set_height (Sheet *sheet, int row, int height)
{
	ColRowInfo *ri;
	int add = 0;
	
	ri = sheet_row_get_info (sheet, row);
	if (ri == &sheet->default_row_style){
		ri = sheet_duplicate_colrow (ri);
		add = 1;
	}

	ri->pos = row;
	ri->pixels = height;
	colrow_set_units (sheet, ri);
	if (add)
388
		sheet_row_add (sheet, ri);
Arturo Espinosa's avatar
Arturo Espinosa committed
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
	sheet_redraw_all (sheet);
}

void
sheet_col_set_width (Sheet *sheet, int col, int width)
{
	ColRowInfo *ci;
	int add = 0;
	
	ci = sheet_col_get_info (sheet, col);
	if (ci == &sheet->default_col_style){
		ci = sheet_duplicate_colrow (ci);
		add = 1;
	}

	ci->pixels = width;
	ci->pos = col;
	colrow_set_units (sheet, ci);
	if (add)
		sheet_col_add (sheet, ci);

	sheet_redraw_all (sheet);
}

413 414 415 416 417 418
/*
 * Return the number of pixels between from_col to to_col
 */
int
sheet_col_get_distance (Sheet *sheet, int from_col, int to_col)
{
419
	ColRowInfo *ci;
420 421
	int pixels = 0, i;

422
	g_assert (sheet);
423
	g_assert (from_col <= to_col);
424 425

	/* This can be optimized, yes, but the implementation
426
	 * of the ColRowInfo sets is going to change anyways
427
	 */
428
	for (i = from_col; i < to_col; i++){
Arturo Espinosa's avatar
Arturo Espinosa committed
429
		ci = sheet_col_get_info (sheet, i);
430
		pixels += ci->pixels;
431 432 433 434 435 436 437 438 439 440
	}
	return pixels;
}

/*
 * Return the number of pixels between from_row to to_row
 */
int
sheet_row_get_distance (Sheet *sheet, int from_row, int to_row)
{
441
	ColRowInfo *ri;
442 443 444 445
	int pixels = 0, i;

	g_assert (from_row <= to_row);
	
446 447 448
	/* This can be optimized, yes, but the implementation
	 * of the RowInfo, ColInfo sets is going to change anyways
	 */
449
	for (i = from_row; i < to_row; i++){
Arturo Espinosa's avatar
Arturo Espinosa committed
450
		ri = sheet_row_get_info (sheet, i);
451
		pixels += ri->pixels;
452 453 454
	}
	return pixels;
}
455 456 457 458

void
sheet_get_cell_bounds (Sheet *sheet, ColType col, RowType row, int *x, int *y, int *w, int *h)
{
459 460 461 462
	GnumericSheet *gsheet;

	g_return_if_fail (sheet != NULL);
	g_return_if_fail (GNUMERIC_IS_SHEET (sheet->sheet_view));
463
	
464
	gsheet = GNUMERIC_SHEET (sheet->sheet_view);
465 466 467 468 469 470
	*x = sheet_col_get_distance (sheet, gsheet->top_col, col);
	*y = sheet_row_get_distance (sheet, gsheet->top_row, row);

	*w = sheet_col_get_distance (sheet, col, col + 1);
	*h = sheet_row_get_distance (sheet, row, row + 1);
}
471

472 473 474 475 476 477 478 479 480 481 482 483 484 485 486
int
sheet_selection_equal (SheetSelection *a, SheetSelection *b)
{
	if (a->start_col != b->start_col)
		return 0;
	if (a->start_row != b->start_row)
		return 0;
	
	if (a->end_col != b->end_col)
		return 0;
	if (a->end_row != b->end_row)
		return 0;
	return 1;
}

487 488 489 490 491
void
sheet_selection_append (Sheet *sheet, int col, int row)
{
	SheetSelection *ss;

492 493
	g_return_if_fail (sheet != NULL);
	
494 495 496 497 498 499 500 501 502 503 504 505
	ss = g_new0 (SheetSelection, 1);

	ss->base_col  = col;
	ss->base_row  = row;

	ss->start_col = col;
	ss->end_col   = col;
	ss->start_row = row;
	ss->end_row   = row;
	
	sheet->selections = g_list_prepend (sheet->selections, ss);

Arturo Espinosa's avatar
Arturo Espinosa committed
506 507 508
	gnumeric_sheet_accept_pending_output (GNUMERIC_SHEET (sheet->sheet_view));
	gnumeric_sheet_load_cell_val (GNUMERIC_SHEET (sheet->sheet_view));
	
509 510
	gnumeric_sheet_set_selection (GNUMERIC_SHEET (sheet->sheet_view), ss);
	sheet_redraw_selection (sheet, ss);
511 512
}

513 514 515 516 517 518 519 520
/*
 * sheet_selection_extend_to
 * @sheet: the sheet
 * @col:   column that gets covered
 * @row:   row that gets covered
 *
 * This extends the selection to cover col, row
 */
521 522 523
void
sheet_selection_extend_to (Sheet *sheet, int col, int row)
{
524 525 526
	SheetSelection *ss, old_selection;

	g_return_if_fail (sheet != NULL);
527
	g_assert (sheet->selections);
528

529 530
	ss = (SheetSelection *) sheet->selections->data;

531 532
	old_selection = *ss;
	
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548
	if (col < ss->base_col){
		ss->start_col = col;
		ss->end_col   = ss->base_col;
	} else {
		ss->start_col = ss->base_col;
		ss->end_col   = col;
	}

	if (row < ss->base_row){
		ss->end_row   = ss->base_row;
		ss->start_row = row;
	} else {
		ss->end_row   = row;
		ss->start_row = ss->base_row;
	}

549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662
	gnumeric_sheet_set_selection (GNUMERIC_SHEET (sheet->sheet_view), ss);

	sheet_redraw_selection (sheet, &old_selection);
	sheet_redraw_selection (sheet, ss);
}

void
sheet_redraw_cell_region (Sheet *sheet, int start_col, int start_row,
			  int end_col, int end_row)
{
	GnumericSheet *gsheet;
	int x, y, w, h;
	
	g_return_if_fail (sheet != NULL);

	gsheet = GNUMERIC_SHEET (sheet->sheet_view);
	g_return_if_fail (GNUMERIC_IS_SHEET (gsheet));
	
	x = sheet_col_get_distance (sheet, gsheet->top_col, start_col);
	y = sheet_row_get_distance (sheet, gsheet->top_row, start_row);
	w = sheet_col_get_distance (sheet, start_col, end_col+1);
	h = sheet_col_get_distance (sheet, start_col, end_col+1);

	gnome_canvas_request_redraw (GNOME_CANVAS (gsheet), x, y, x+w, y+h);
}

void
sheet_redraw_selection (Sheet *sheet, SheetSelection *ss)
{
	g_return_if_fail (sheet != NULL);
	g_return_if_fail (ss != NULL);
	
	sheet_redraw_cell_region (sheet,
				  ss->start_col, ss->start_row,
				  ss->end_col, ss->end_row);
}

int
sheet_row_check_bound (int row, int diff)
{
	int new_val = row + diff;

	if (new_val < 0)
		return 0;
	if (new_val >= SHEET_MAX_ROWS)
		return SHEET_MAX_ROWS - 1;

	return new_val;
}

int
sheet_col_check_bound (int col, int diff)
{
	int new_val = col + diff;

	if (new_val < 0)
		return 0;
	if (new_val >= SHEET_MAX_COLS)
		return SHEET_MAX_COLS - 1;

	return new_val;
}

static void
sheet_selection_change (Sheet *sheet, SheetSelection *old, SheetSelection *new)
{
	GnumericSheet *gsheet = GNUMERIC_SHEET (sheet->sheet_view);
	
	if (sheet_selection_equal (old, new))
		return;
	
		
	gnumeric_sheet_accept_pending_output (gsheet);
	sheet_redraw_selection (sheet, old);
	sheet_redraw_selection (sheet, new);
	
	gnumeric_sheet_set_selection (gsheet, new);
}

/*
 * sheet_selection_extend_horizontal
 * @sheet:  The Sheet *
 * @count:  units to extend the selection horizontally
 */
void
sheet_selection_extend_horizontal (Sheet *sheet, int n)
{
	SheetSelection *ss;
	SheetSelection old_selection;

	/* FIXME: right now we only support units (1 or -1)
	 * to fix this we need to account for the fact that
	 * the selection boundary might change and adjust
	 * appropiately
	 */
	 
	g_return_if_fail (sheet != NULL);
	g_return_if_fail ((n == 1 || n == -1));
	
	ss = (SheetSelection *)sheet->selections->data;
	old_selection = *ss;
	
	if (ss->base_col < ss->end_col)
		ss->end_col = sheet_col_check_bound (ss->end_col, n);
	else if (ss->base_col > ss->start_col)
		ss->start_col = sheet_col_check_bound (ss->start_col, n);
	else {
		if (n > 0)
			ss->end_col = sheet_col_check_bound (ss->end_col, 1);
		else
			ss->start_col = sheet_col_check_bound (ss->start_col, -1);
	}

	sheet_selection_change (sheet, &old_selection, ss);
663 664
}

665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702
/*
 * sheet_selection_extend_vertical
 * @sheet:  The Sheet *
 * @n:      units to extend the selection vertically
 */
void
sheet_selection_extend_vertical (Sheet *sheet, int n)
{
	SheetSelection *ss;
	SheetSelection old_selection;
	
	g_return_if_fail (sheet != NULL);
	g_return_if_fail ((n == 1 || n == -1));
	
	ss = (SheetSelection *)sheet->selections->data;
	old_selection = *ss;
	
	if (ss->base_row < ss->end_row)
		ss->end_row = sheet_row_check_bound (ss->end_row, n);
	else if (ss->base_row > ss->start_row)
		ss->start_row = sheet_row_check_bound (ss->start_row, n);
	else {
		if (n > 0)
			ss->end_row = sheet_row_check_bound (ss->end_row, 1);
		else
			ss->start_row = sheet_row_check_bound (ss->start_row, -1);
	}

	sheet_selection_change (sheet, &old_selection, ss);
}

/*
 * sheet_selection_clear
 * sheet:  The sheet
 *
 * Clears all of the selection ranges and resets it to a
 * selection that only covers the cursor
 */
703 704 705
void
sheet_selection_clear (Sheet *sheet)
{
706
	GnumericSheet *gsheet;
707 708
	GList *list = sheet->selections;

709 710 711 712
	g_return_if_fail (sheet != NULL);

	gsheet = GNUMERIC_SHEET (sheet->sheet_view);
	
713 714 715
	for (list = sheet->selections; list; list = list->next){
		SheetSelection *ss = list->data;

716
		sheet_redraw_selection (sheet, ss);
717 718 719 720
		g_free (ss);
	}
	g_list_free (sheet->selections);
	sheet->selections = NULL;
721
	sheet_selection_append (sheet, gsheet->cursor_col, gsheet->cursor_row);
722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737
}

int
sheet_selection_is_cell_selected (Sheet *sheet, int col, int row)
{
	GList *list = sheet->selections;

	for (list = sheet->selections; list; list = list->next){
		SheetSelection *ss = list->data;

		if ((ss->start_col <= col) && (col <= ss->end_col) &&
		    (ss->start_row <= row) && (row <= ss->end_row))
			return 1;
	}
	return 0;
}
Arturo Espinosa's avatar
Arturo Espinosa committed
738 739 740 741 742 743 744

/*
 * Returns an allocated column:  either an existing one, or a fresh copy
 */
ColRowInfo *
sheet_col_get (Sheet *sheet, int pos)
{
745
	GList *clist;
Arturo Espinosa's avatar
Arturo Espinosa committed
746
	ColRowInfo *col;
747 748

	g_return_if_fail (sheet != NULL);
Arturo Espinosa's avatar
Arturo Espinosa committed
749
	
750
	for (clist = sheet->cols_info; clist; clist = clist->next){
Arturo Espinosa's avatar
Arturo Espinosa committed
751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767
		col = (ColRowInfo *) clist->data;

		if (col->pos == pos)
			return col;
	}
	col = sheet_col_new (sheet);
	sheet_col_add (sheet, col);
	
	return col;
}

/*
 * Returns an allocated column:  either an existing one, or a fresh copy
 */
ColRowInfo *
sheet_row_get (Sheet *sheet, int pos)
{
768
	GList *rlist;
Arturo Espinosa's avatar
Arturo Espinosa committed
769
	ColRowInfo *row;
770 771

	g_return_if_fail (sheet != NULL);
Arturo Espinosa's avatar
Arturo Espinosa committed
772
	
773
	for (rlist = sheet->rows_info; rlist; rlist = rlist->next){
Arturo Espinosa's avatar
Arturo Espinosa committed
774 775 776 777 778 779 780 781 782 783 784
		row = (ColRowInfo *) rlist->data;

		if (row->pos == pos)
			return row;
	}
	row = sheet_col_new (sheet);
	sheet_col_add (sheet, row);
	
	return row;
}

785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830
static void
gen_row_blanks (Sheet *sheet, int col, int start_row, int end_row,
		sheet_cell_foreach_callback callback, void *closure)
{
	int row;

	for (row = 0; row < end_row; row++)
		(*callback)(sheet, col, row, NULL, closure);
}

static void
gen_col_blanks (Sheet *sheet, int start_col, int end_col,
		int start_row, int end_row,
		sheet_cell_foreach_callback callback, void *closure)
{
	int col;
       
	for (col = 0; col < end_col; col++)
		gen_row_blanks (sheet, col, start_row, end_row, callback, closure);
}

Cell *
sheet_cell_get (Sheet *sheet, int col, int row)
{
	GList *cols;
	GList *rows;

	g_return_if_fail (sheet != NULL);

	for (cols = sheet->cols_info; cols; cols = cols->next){
		ColRowInfo *ci = cols->data;

		if (ci->pos == cols){
			row = (GList *) ci->data;
			
			for (; rows; rows = rows->next){
				ColRowInfo *ri = (ColRowInfo *) rows->data;
				
				if (ri->pos == row)
					return (Cell *) ri->data;
			}
		}
	}
	return NULL;
}

Arturo Espinosa's avatar
Arturo Espinosa committed
831 832
/*
 * For each existing cell in the range specified, invoke the
833 834
 * callback routine.  If the only_existing flag is passed, then
 * callbacks are only invoked for existing cells.
Arturo Espinosa's avatar
Arturo Espinosa committed
835 836
 */
void
837
sheet_cell_foreach_range (Sheet *sheet, int only_existing,
Arturo Espinosa's avatar
Arturo Espinosa committed
838 839 840 841 842
			  int start_col, int start_row,
			  int end_col, int end_row,
			  sheet_cell_foreach_callback callback,
			  void *closure)
{
843
	GList *col;
Arturo Espinosa's avatar
Arturo Espinosa committed
844
	GList *row;
845
	int   last_col_gen = -1, last_row_gen = -1;
Arturo Espinosa's avatar
Arturo Espinosa committed
846

847 848 849 850
	g_return_if_fail (sheet != NULL);
	g_return_if_fail (callback != NULL);
	
	col = sheet->cols_info;
Arturo Espinosa's avatar
Arturo Espinosa committed
851 852 853 854 855 856 857 858
	for (; col; col = col->next){
		ColRowInfo *ci = col->data;

		if (ci->pos < start_col)
			continue;
		if (ci->pos > end_col)
			break;

859 860 861 862 863 864 865 866 867 868 869 870 871 872
		if (!only_existing){
			if ((last_col_gen > 0) && (ci->pos != last_col_gen+1))
				gen_col_blanks (sheet, last_col_gen, ci->pos,
						start_row, end_row, callback,
						closure);
					
			if (ci->pos > start_col)
				gen_col_blanks (sheet, start_col, ci->pos,
						start_row, end_row, callback,
						closure);
		}
		last_col_gen = ci->pos;

		last_row_gen = -1;
Arturo Espinosa's avatar
Arturo Espinosa committed
873 874 875 876 877 878 879 880 881
		for (row = (GList *) ci->data; row; row = row->data){
			ColRowInfo *ri = row->data;

			if (ri->pos < start_row)
				continue;

			if (ri->pos > end_row)
				break;

882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
			if (!only_existing){
				if (last_row_gen > 0){
					if (ri->pos != last_row_gen+1)
						gen_row_blanks (sheet, ci->pos,
								last_row_gen,
								ri->pos,
								callback,
								closure);
				}
				if (ri->pos > start_row)
					gen_row_blanks (sheet, ci->pos,
							ri->pos, start_row,
							callback, closure);
			}
			(*callback)(sheet, ci->pos, ri->pos, (Cell *) ri->data, closure);
Arturo Espinosa's avatar
Arturo Espinosa committed
897 898 899 900 901 902 903
		}
	}
}

Style *
sheet_style_compute (Sheet *sheet, int col, int row)
{
904 905
	g_return_if_fail (sheet != NULL);
	
Arturo Espinosa's avatar
Arturo Espinosa committed
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931
	/* FIXME: This should compute the style based on the
	 * story of the styles applied to the worksheet, the
	 * sheet, the column and the row and return that.
	 *
	 * for now, we just return the col style
	 */
	return style_duplicate (sheet_col_get_info (sheet, col)->style);
}

Cell *
sheet_cell_new (Sheet *sheet, int col, int row)
{
	Cell *cell = g_new0 (Cell, 1);

	cell->col = sheet_col_get (sheet, col);
	cell->row = sheet_row_get (sheet, row);

	cell->style = sheet_style_compute (sheet, col, row);
	return cell;
}

Cell *
sheet_cell_new_with_text (Sheet *sheet, int col, int row, char *text)
{
	Cell *cell;
	GdkFont *font;
932 933 934

	g_return_if_fail (sheet != NULL);
	g_return_if_fail (text != NULL);
Arturo Espinosa's avatar
Arturo Espinosa committed
935 936 937 938 939 940 941 942 943
	
	cell = sheet_cell_new (sheet, col, row);
	cell->text = g_strdup (text);
	font = cell->style->font->font;
	cell->width = gdk_text_width (font, text, strlen (text));
	cell->height = font->ascent + font->descent;
	
	return cell;
}
944 945 946 947 948 949 950

void
sheet_cell_add (Sheet *sheet, Cell *cell)
{
	g_return_if_fail (sheet != NULL);
	g_return_if_fail (cell != NULL);
}