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package org.eclipse.swt.graphics;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved
*/
import org.eclipse.swt.internal.photon.*;
import org.eclipse.swt.*;
public final class Region {
/**
* the OS resource for the region
* (Warning: This field is platform dependent)
*/
public int handle;
static int EMPTY_REGION = -1;
public Region () {
handle = EMPTY_REGION;
}
Region(int handle) {
this.handle = handle;
}
public void add (Rectangle rect) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (handle == 0) return;
int tile_ptr = OS.PhGetTile();
PhTile_t tile = new PhTile_t();
tile.rect_ul_x = (short)rect.x;
tile.rect_ul_y = (short)rect.y;
tile.rect_lr_x = (short)(rect.x + rect.width - 1);
tile.rect_lr_y = (short)(rect.y + rect.height - 1);
OS.memmove(tile_ptr, tile, PhTile_t.sizeof);
if (handle == EMPTY_REGION) handle = tile_ptr;
else handle = OS.PhAddMergeTiles (handle, tile_ptr, null);
}
public void add (Region region) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (region == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (handle == 0) return;
if (region.handle == 0 || region.handle == EMPTY_REGION) return;
int copy = OS.PhCopyTiles(region.handle);
if (handle == EMPTY_REGION) handle = copy;
else handle = OS.PhAddMergeTiles (handle, copy, null);
}
public boolean contains (int x, int y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (handle == 0 || handle == EMPTY_REGION) return false;
int tile_ptr = OS.PhGetTile();
PhTile_t tile = new PhTile_t();
tile.rect_ul_x = tile.rect_lr_x = (short)x;
tile.rect_ul_y = tile.rect_lr_y = (short)y;
OS.memmove(tile_ptr, tile, PhTile_t.sizeof);
int intersection = OS.PhIntersectTilings (tile_ptr, handle, null);
boolean result = intersection != 0;
OS.PhFreeTiles(tile_ptr);
OS.PhFreeTiles(intersection);
return result;
}
public boolean contains (Point pt) {
if (pt == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
return contains(pt.x, pt.y);
}
public void dispose () {
if (handle == 0) return;
if (handle != EMPTY_REGION) OS.PhFreeTiles (handle);
handle = 0;
}
public boolean equals (Object object) {
if (this == object) return true;
if (!(object instanceof Region)) return false;
int rgn = ((Region)object).handle;
return handle == rgn;
}
public Rectangle getBounds() {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (handle == 0 || handle == EMPTY_REGION) return new Rectangle(0, 0, 0, 0);
PhTile_t tile = new PhTile_t();
int temp_tile;
int rect_ptr = OS.malloc(PhRect_t.sizeof);
OS.memmove(rect_ptr, handle, PhRect_t.sizeof);
OS.memmove(tile, handle, PhTile_t.sizeof);
while ((temp_tile = tile.next) != 0) {
OS.PhRectUnion (rect_ptr, temp_tile);
OS.memmove(tile, temp_tile, PhTile_t.sizeof);
}
PhRect_t rect = new PhRect_t();
OS.memmove(rect, rect_ptr, PhRect_t.sizeof);
OS.free(rect_ptr);
int width = rect.lr_x - rect.ul_x + 1;
int height = rect.lr_y - rect.ul_y + 1;
return new Rectangle(rect.ul_x, rect.ul_y, width, height);
}
public int hashCode () {
return handle;
}
public boolean intersects (int x, int y, int width, int height) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (handle == 0 || handle == EMPTY_REGION) return false;
int tile_ptr = OS.PhGetTile();
PhTile_t tile = new PhTile_t();
tile.rect_ul_x = (short)x;
tile.rect_ul_y = (short)y;
tile.rect_lr_x = (short)(x + width - 1);
tile.rect_lr_y = (short)(y + height - 1);
OS.memmove(tile_ptr, tile, PhTile_t.sizeof);
int intersection = OS.PhIntersectTilings (tile_ptr, handle, null);
boolean result = intersection != 0;
OS.PhFreeTiles(tile_ptr);
OS.PhFreeTiles(intersection);
return result;
}
public boolean intersects (Rectangle rect) {
if (rect == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
return intersects(rect.x, rect.y, rect.width, rect.height);
}
public boolean isDisposed() {
return handle == 0;
}
public boolean isEmpty () {
return getBounds().isEmpty();
}
public static Region photon_new(int handle) {
return new Region(handle);
}
public String toString () {
if (isDisposed()) return "Region {*DISPOSED*}";
return "Region {" + handle + "}";
}
}
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