webglimpse
Version:
Webglimpse is a data visualization library for the web.
120 lines • 14.8 kB
JavaScript
/*
* Copyright (c) 2014, Metron, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
class CacheEntry {
constructor(value) {
this.touched = false;
this.value = value;
}
}
export class Cache {
constructor(helper) {
this.helper = helper;
this.map = {};
}
value(key) {
if (!this.map.hasOwnProperty(key)) {
this.map[key] = new CacheEntry(this.helper.create(key));
}
const en = this.map[key];
en.touched = true;
return en.value;
}
clear() {
for (const k in this.map) {
if (this.map.hasOwnProperty(k)) {
this.helper.dispose(this.map[k].value, k);
}
}
this.map = {};
}
remove(key) {
if (this.map.hasOwnProperty(key)) {
this.helper.dispose(this.map[key].value, key);
delete this.map[key];
}
}
removeAll(keys) {
for (let i = 0; i < keys.length; i++) {
this.remove(keys[i]);
}
}
retain(key) {
const newMap = {};
if (this.map.hasOwnProperty(key)) {
newMap[key] = this.map[key];
delete this.map[key];
}
for (const k in this.map) {
if (this.map.hasOwnProperty(k)) {
this.helper.dispose(this.map[k].value, k);
}
}
this.map = newMap;
}
retainAll(keys) {
const newMap = {};
for (let i = 0; i < keys.length; i++) {
const k = keys[i];
if (this.map.hasOwnProperty(k)) {
newMap[k] = this.map[k];
delete this.map[k];
}
}
for (const k2 in this.map) {
if (this.map.hasOwnProperty(k2)) {
this.helper.dispose(this.map[k2].value, k2);
}
}
this.map = newMap;
}
resetTouches() {
for (const k in this.map) {
if (this.map.hasOwnProperty(k)) {
this.map[k].touched = false;
}
}
}
retainTouched() {
const newMap = {};
for (const k in this.map) {
if (this.map.hasOwnProperty(k)) {
const en = this.map[k];
if (en.touched) {
newMap[k] = this.map[k];
}
else {
this.helper.dispose(en.value, k);
}
}
}
this.map = newMap;
}
}
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Redistributions of source code must retain the above copyright notice, this\r\n *    list of conditions and the following disclaimer.\r\n *\r\n * 2. Redistributions in binary form must reproduce the above copyright notice,\r\n *    this list of conditions and the following disclaimer in the documentation\r\n *    and/or other materials provided with the distribution.\r\n *\r\n * 3. Neither the name of the copyright holder nor the names of its contributors\r\n *    may be used to endorse or promote products derived from this software without\r\n *    specific prior written permission.\r\n *\r\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND\r\n * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r\n * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR\r\n * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r\n * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON\r\n * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r\n */\r\n\r\n\r\n\r\nexport interface CacheHelper<V> {\r\n    create(key: string): V;\r\n    dispose(value: V, key: string): void;\r\n}\r\n\r\n\r\nclass CacheEntry<V> {\r\n    value: V;\r\n    touched = false;\r\n\r\n    constructor(value: V) {\r\n        this.value = value;\r\n    }\r\n}\r\n\r\n\r\nexport class Cache<V> {\r\n    private helper: CacheHelper<V>;\r\n    private map: { [k: string]: CacheEntry<V>; };\r\n\r\n    constructor(helper: CacheHelper<V>) {\r\n        this.helper = helper;\r\n        this.map = {};\r\n    }\r\n\r\n    value(key: string): V {\r\n        if (!this.map.hasOwnProperty(key)) {\r\n            this.map[key] = new CacheEntry<V>(this.helper.create(key));\r\n        }\r\n        const en = this.map[key];\r\n\r\n        en.touched = true;\r\n        return en.value;\r\n    }\r\n\r\n    clear() {\r\n        for (const k in this.map) {\r\n            if (this.map.hasOwnProperty(k)) {\r\n                this.helper.dispose(this.map[k].value, k);\r\n            }\r\n        }\r\n        this.map = {};\r\n    }\r\n\r\n    remove(key: string) {\r\n        if (this.map.hasOwnProperty(key)) {\r\n            this.helper.dispose(this.map[key].value, key);\r\n            delete this.map[key];\r\n        }\r\n    }\r\n\r\n    removeAll(keys: string[]) {\r\n        for (let i = 0; i < keys.length; i++) {\r\n            this.remove(keys[i]);\r\n        }\r\n    }\r\n\r\n    retain(key: string) {\r\n        const newMap: { [k: string]: CacheEntry<V>; } = {};\r\n        if (this.map.hasOwnProperty(key)) {\r\n            newMap[key] = this.map[key];\r\n            delete this.map[key];\r\n        }\r\n        for (const k in this.map) {\r\n            if (this.map.hasOwnProperty(k)) {\r\n                this.helper.dispose(this.map[k].value, k);\r\n            }\r\n        }\r\n        this.map = newMap;\r\n    }\r\n\r\n    retainAll(keys: string[]) {\r\n        const newMap: { [key: string]: CacheEntry<V>; } = {};\r\n        for (let i = 0; i < keys.length; i++) {\r\n            const k = keys[i];\r\n            if (this.map.hasOwnProperty(k)) {\r\n                newMap[k] = this.map[k];\r\n                delete this.map[k];\r\n            }\r\n        }\r\n        for (const k2 in this.map) {\r\n            if (this.map.hasOwnProperty(k2)) {\r\n                this.helper.dispose(this.map[k2].value, k2);\r\n            }\r\n        }\r\n        this.map = newMap;\r\n    }\r\n\r\n    resetTouches() {\r\n        for (const k in this.map) {\r\n            if (this.map.hasOwnProperty(k)) {\r\n                this.map[k].touched = false;\r\n            }\r\n        }\r\n    }\r\n\r\n    retainTouched() {\r\n        const newMap: { [k: string]: CacheEntry<V>; } = {};\r\n        for (const k in this.map) {\r\n            if (this.map.hasOwnProperty(k)) {\r\n                const en = this.map[k];\r\n                if (en.touched) {\r\n                    newMap[k] = this.map[k];\r\n                }\r\n                else {\r\n                    this.helper.dispose(en.value, k);\r\n                }\r\n            }\r\n        }\r\n        this.map = newMap;\r\n    }\r\n}\r\n\r\n\r\n"]}