mapcomplete/Utils.ts

287 lines
No EOL
8.9 KiB
TypeScript

import * as $ from "jquery"
export class Utils {
/**
* In the 'deploy'-step, some code needs to be run by ts-node.
* However, ts-node crashes when it sees 'document'. When running from console, we flag this and disable all code where document is needed.
* This is a workaround and yet another hack
*/
public static runningFromConsole = false;
public static readonly assets_path = "./assets/svg/";
private static knownKeys = ["addExtraTags", "and", "calculatedTags", "changesetmessage", "clustering", "color", "condition", "customCss", "dashArray", "defaultBackgroundId", "description", "descriptionTail", "doNotDownload", "enableAddNewPoints", "enableBackgroundLayerSelection", "enableGeolocation", "enableLayers", "enableMoreQuests", "enableSearch", "enableShareScreen", "enableUserBadge", "freeform", "hideFromOverview", "hideInAnswer", "icon", "iconOverlays", "iconSize", "id", "if", "ifnot", "isShown", "key", "language", "layers", "lockLocation", "maintainer", "mappings", "maxzoom", "maxZoom", "minNeededElements", "minzoom", "multiAnswer", "name", "or", "osmTags", "passAllFeatures", "presets", "question", "render", "roaming", "roamingRenderings", "rotation", "shortDescription", "socialImage", "source", "startLat", "startLon", "startZoom", "tagRenderings", "tags", "then", "title", "titleIcons", "type", "version", "wayHandling", "widenFactor", "width"]
private static extraKeys = ["nl", "en", "fr", "de", "pt", "es", "name", "phone", "email", "amenity", "leisure", "highway", "building", "yes", "no", "true", "false"]
static EncodeXmlValue(str) {
return str.replace(/&/g, '&')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
}
/**
* Gives a clean float, or undefined if parsing fails
* @param str
*/
static asFloat(str): number {
if (str) {
const i = parseFloat(str);
if (isNaN(i)) {
return undefined;
}
return i;
}
return undefined;
}
public static Upper(str: string) {
return str.substr(0, 1).toUpperCase() + str.substr(1);
}
public static TwoDigits(i: number) {
if (i < 10) {
return "0" + i;
}
return "" + i;
}
public static Round(i: number) {
if (i < 0) {
return "-" + Utils.Round(-i);
}
const j = "" + Math.floor(i * 10);
if (j.length == 1) {
return "0." + j;
}
return j.substr(0, j.length - 1) + "." + j.substr(j.length - 1, j.length);
}
public static Times(f: ((i: number) => string), count: number): string {
let res = "";
for (let i = 0; i < count; i++) {
res += f(i);
}
return res;
}
static DoEvery(millis: number, f: (() => void)) {
if (Utils.runningFromConsole) {
return;
}
window.setTimeout(
function () {
f();
Utils.DoEvery(millis, f);
}
, millis)
}
public static NoNull<T>(array: T[]): T[] {
const ls: T[] = [];
for (const t of array) {
if (t === undefined || t === null) {
continue;
}
ls.push(t);
}
return ls;
}
public static NoEmpty(array: string[]): string[] {
const ls: string[] = [];
for (const t of array) {
if (t === "") {
continue;
}
ls.push(t);
}
return ls;
}
public static EllipsesAfter(str: string, l: number = 100) {
if (str === undefined) {
return undefined;
}
if (str.length <= l) {
return str;
}
return str.substr(0, l - 3) + "...";
}
public static Dedup(arr: string[]): string[] {
if (arr === undefined) {
return undefined;
}
const newArr = [];
for (const string of arr) {
if (newArr.indexOf(string) < 0) {
newArr.push(string);
}
}
return newArr;
}
public static MergeTags(a: any, b: any) {
const t = {};
for (const k in a) {
t[k] = a[k];
}
for (const k in b) {
t[k] = b[k];
}
return t;
}
public static SplitFirst(a: string, sep: string): string[] {
const index = a.indexOf(sep);
if (index < 0) {
return [a];
}
return [a.substr(0, index), a.substr(index + sep.length)];
}
// Date will be undefined on failure
public static LoadCustomCss(location: string) {
const head = document.getElementsByTagName('head')[0];
const link = document.createElement('link');
link.id = "customCss";
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = location;
link.media = 'all';
head.appendChild(link);
console.log("Added custom layout ", location)
}
static Merge(source: any, target: any) {
for (const key in source) {
const sourceV = source[key];
const targetV = target[key]
if (typeof sourceV === "object") {
if (targetV === undefined) {
target[key] = sourceV;
} else {
Utils.Merge(sourceV, targetV);
}
} else {
target[key] = sourceV;
}
}
return target;
}
static getOrSetDefault<K, V>(dict: Map<K, V>, k: K, v: () => V) {
let found = dict.get(k);
if (found !== undefined) {
return found;
}
dict.set(k, v());
return dict.get(k);
}
/**
* Calculates the tile bounds of the
* @param z
* @param x
* @param y
* @returns [[lat, lon], [lat, lon]]
*/
static tile_bounds(z: number, x: number, y: number): [[number, number], [number, number]] {
return [[Utils.tile2lat(y, z), Utils.tile2long(x, z)], [Utils.tile2lat(y + 1, z), Utils.tile2long(x + 1, z)]]
}
/**
* Return x, y of the tile containing (lat, lon) on the given zoom level
*/
static embedded_tile(lat: number, lon: number, z: number): { x: number, y: number, z: number } {
return {x: Utils.lon2tile(lon, z), y: Utils.lat2tile(lat, z), z: z}
}
static TileRangeBetween(zoomlevel: number, lat0: number, lon0: number, lat1:number, lon1: number) : TileRange{
const t0 = Utils.embedded_tile(lat0, lon0, zoomlevel)
const t1 = Utils.embedded_tile(lat1, lon1, zoomlevel)
const xstart = Math.min(t0.x, t1.x)
const xend = Math.max(t0.x, t1.x)
const ystart = Math.min(t0.y, t1.y)
const yend = Math.max(t0.y, t1.y)
const total = (1 + xend - xstart) * (1 + yend - ystart)
return {
xstart: xstart,
xend: xend,
ystart: ystart,
yend: yend,
total: total,
zoomlevel: zoomlevel
}
}
public static MinifyJSON(stringified: string): string {
stringified = stringified.replace(/\|/g, "||");
const keys = Utils.knownKeys.concat(Utils.extraKeys);
for (let i = 0; i < keys.length; i++) {
const knownKey = keys[i];
let code = i;
if (i >= 124) {
code += 1; // Character 127 is our 'escape' character |
}
let replacement = "|" + String.fromCharCode(code)
stringified = stringified.replace(new RegExp(`\"${knownKey}\":`, "g"), replacement);
}
return stringified;
}
public static UnMinify(minified: string): string {
const parts = minified.split("|");
let result = parts.shift();
const keys = Utils.knownKeys.concat(Utils.extraKeys);
for (const part of parts) {
if (part == "") {
// Empty string => this was a || originally
result += "|"
continue
}
const i = part.charCodeAt(0);
result += "\"" + keys[i] + "\":" + part.substring(1)
}
return result;
}
private static tile2long(x, z) {
return (x / Math.pow(2, z) * 360 - 180);
}
private static tile2lat(y, z) {
const n = Math.PI - 2 * Math.PI * y / Math.pow(2, z);
return (180 / Math.PI * Math.atan(0.5 * (Math.exp(n) - Math.exp(-n))));
}
private static lon2tile(lon, zoom) {
return (Math.floor((lon + 180) / 360 * Math.pow(2, zoom)));
}
private static lat2tile(lat, zoom) {
return (Math.floor((1 - Math.log(Math.tan(lat * Math.PI / 180) + 1 / Math.cos(lat * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, zoom)));
}
}
export interface TileRange{
xstart: number,
ystart: number,
xend: number,
yend: number,
total: number,
zoomlevel: number
}