+++ /dev/null
-/*
- * Copyright © 2010 Anthony Towns <aj@erisian.com.au>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program 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
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-package org.altusmetrum.altosuilib_3;
-
-import javax.swing.*;
-import javax.imageio.ImageIO;
-import java.awt.image.*;
-import java.awt.*;
-import java.io.*;
-import java.net.*;
-
-public class AltosUIMapCache implements AltosUIMapCacheListener {
- static final int success = 0;
- static final int loading = 1;
- static final int failed = 2;
- static final int bad_request = 3;
- static final int forbidden = 4;
-
- int min_cache_size; /* configured minimum cache size */
- int cache_size; /* current cache size */
- int requested_cache_size; /* cache size computed by application */
-
- private Object fetch_lock = new Object();
- private Object cache_lock = new Object();
-
- AltosUIMapImage[] images = new AltosUIMapImage[cache_size];
-
- long used;
-
- public void set_cache_size(int new_size) {
-
- requested_cache_size = new_size;
-
- if (new_size < min_cache_size)
- new_size = min_cache_size;
-
- if (new_size == cache_size)
- return;
-
- synchronized(cache_lock) {
- AltosUIMapImage[] new_images = new AltosUIMapImage[new_size];
-
- for (int i = 0; i < cache_size; i++) {
- if (i < new_size)
- new_images[i] = images[i];
- else if (images[i] != null)
- images[i].flush();
- }
- images = new_images;
- cache_size = new_size;
- }
- }
-
- public Image get(AltosUIMapTile tile, AltosUIMapStore store, int width, int height) {
- int oldest = -1;
- long age = used;
-
- synchronized(cache_lock) {
- AltosUIMapImage image = null;
- for (int i = 0; i < cache_size; i++) {
- image = images[i];
-
- if (image == null) {
- oldest = i;
- break;
- }
- if (store.equals(image.store)) {
- image.used = used++;
- return image.image;
- }
- if (image.used < age) {
- oldest = i;
- age = image.used;
- }
- }
-
- try {
- image = new AltosUIMapImage(tile, store);
- image.used = used++;
- if (images[oldest] != null)
- images[oldest].flush();
-
- images[oldest] = image;
-
- if (image.image == null)
- tile.set_status(loading);
- else
- tile.set_status(success);
-
- return image.image;
- } catch (IOException e) {
- tile.set_status(failed);
- return null;
- }
- }
- }
-
- public void map_cache_changed(int map_cache) {
- min_cache_size = map_cache;
-
- set_cache_size(requested_cache_size);
- }
-
- public void dispose() {
- AltosUIPreferences.unregister_map_cache_listener(this);
-
- for (int i = 0; i < cache_size; i++) {
- AltosUIMapImage image = images[i];
-
- if (image != null)
- image.flush();
- }
- }
-
- public AltosUIMapCache() {
- min_cache_size = AltosUIPreferences.map_cache();
-
- set_cache_size(0);
-
- AltosUIPreferences.register_map_cache_listener(this);
- }
-}