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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* Copyright (C) 1999, 2000 Free Software Foundation
Copyright (C) 2000 Eazel, Inc.
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Suite 500,
Boston, MA 02110-1335, USA.
Author: Ettore Perazzoli <ettore@gnu.org>
*/
#include "math.h"
#include <eel/eel-art-extensions.h>
#include "nemo-icon-private.h"
NemoPlacementGrid *
nemo_placement_grid_new (NemoIconContainer *container, gboolean tight)
{
NemoPlacementGrid *grid;
int width, height;
int num_columns;
int num_rows;
int i;
GtkAllocation allocation;
/* Get container dimensions */
gtk_widget_get_allocation (GTK_WIDGET (container), &allocation);
width = nemo_icon_container_get_canvas_width (container, allocation);
height = nemo_icon_container_get_canvas_height (container, allocation);
num_columns = width / GET_VIEW_CONSTANT (container, snap_size_x);
num_rows = height / GET_VIEW_CONSTANT (container, snap_size_y);
if (num_columns == 0 || num_rows == 0) {
return NULL;
}
grid = g_new0 (NemoPlacementGrid, 1);
grid->container = container;
grid->tight = tight;
grid->num_columns = num_columns;
grid->num_rows = num_rows;
grid->grid_memory = g_new0 (int, (num_rows * num_columns));
grid->icon_grid = g_new0 (int *, num_columns);
for (i = 0; i < num_columns; i++) {
grid->icon_grid[i] = grid->grid_memory + (i * num_rows);
}
return grid;
}
void
nemo_placement_grid_free (NemoPlacementGrid *grid)
{
g_free (grid->icon_grid);
g_free (grid->grid_memory);
g_free (grid);
}
gboolean
nemo_placement_grid_position_is_free (NemoPlacementGrid *grid, EelIRect pos)
{
int x, y;
g_assert (pos.x0 >= 0 && pos.x0 < grid->num_columns);
g_assert (pos.y0 >= 0 && pos.y0 < grid->num_rows);
g_assert (pos.x1 >= 0 && pos.x1 < grid->num_columns);
g_assert (pos.y1 >= 0 && pos.y1 < grid->num_rows);
for (x = pos.x0; x <= pos.x1; x++) {
for (y = pos.y0; y <= pos.y1; y++) {
if (grid->icon_grid[x][y] != 0) {
return FALSE;
}
}
}
return TRUE;
}
void
nemo_placement_grid_mark (NemoPlacementGrid *grid, EelIRect pos)
{
int x, y;
g_assert (pos.x0 >= 0 && pos.x0 < grid->num_columns);
g_assert (pos.y0 >= 0 && pos.y0 < grid->num_rows);
g_assert (pos.x1 >= 0 && pos.x1 < grid->num_columns);
g_assert (pos.y1 >= 0 && pos.y1 < grid->num_rows);
for (x = pos.x0; x <= pos.x1; x++) {
for (y = pos.y0; y <= pos.y1; y++) {
grid->icon_grid[x][y] = 1;
}
}
}
void
nemo_placement_grid_canvas_position_to_grid_position (NemoPlacementGrid *grid,
EelIRect canvas_position,
EelIRect *grid_position)
{
/* The first causes minimal moving around during a snap, but
* can end up with partially overlapping icons. The second one won't
* allow any overlapping, but can cause more movement to happen
* during a snap. */
NemoIconContainer *container = grid->container;
if (grid->tight) {
grid_position->x0 = ceil ((double)(canvas_position.x0 - GET_VIEW_CONSTANT (container, desktop_pad_horizontal)) / GET_VIEW_CONSTANT (container, snap_size_x));
grid_position->y0 = ceil ((double)(canvas_position.y0 - GET_VIEW_CONSTANT (container, desktop_pad_vertical)) / GET_VIEW_CONSTANT (container, snap_size_y));
grid_position->x1 = floor ((double)(canvas_position.x1 - GET_VIEW_CONSTANT (container, desktop_pad_horizontal)) / GET_VIEW_CONSTANT (container, snap_size_x));
grid_position->y1 = floor ((double)(canvas_position.y1 - GET_VIEW_CONSTANT (container, desktop_pad_vertical)) / GET_VIEW_CONSTANT (container, snap_size_y));
} else {
grid_position->x0 = floor ((double)(canvas_position.x0 - GET_VIEW_CONSTANT (container, desktop_pad_horizontal)) / GET_VIEW_CONSTANT (container, snap_size_x));
grid_position->y0 = floor ((double)(canvas_position.y0 - GET_VIEW_CONSTANT (container, desktop_pad_vertical)) / GET_VIEW_CONSTANT (container, snap_size_y));
grid_position->x1 = floor ((double)(canvas_position.x1 - GET_VIEW_CONSTANT (container, desktop_pad_horizontal)) / GET_VIEW_CONSTANT (container, snap_size_x));
grid_position->y1 = floor ((double)(canvas_position.y1 - GET_VIEW_CONSTANT (container, desktop_pad_vertical)) / GET_VIEW_CONSTANT (container, snap_size_y));
}
grid_position->x0 = CLAMP (grid_position->x0, 0, grid->num_columns - 1);
grid_position->y0 = CLAMP (grid_position->y0, 0, grid->num_rows - 1);
grid_position->x1 = CLAMP (grid_position->x1, grid_position->x0, grid->num_columns - 1);
grid_position->y1 = CLAMP (grid_position->y1, grid_position->y0, grid->num_rows - 1);
}
void
nemo_placement_grid_mark_icon (NemoPlacementGrid *grid, NemoIcon *icon)
{
EelIRect icon_pos;
EelIRect grid_pos;
nemo_icon_container_icon_get_bounding_box (grid->container, icon,
&icon_pos.x0, &icon_pos.y0,
&icon_pos.x1, &icon_pos.y1,
BOUNDS_USAGE_FOR_LAYOUT);
nemo_placement_grid_canvas_position_to_grid_position (grid,
icon_pos,
&grid_pos);
nemo_placement_grid_mark (grid, grid_pos);
}
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