mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-30 20:10:28 +00:00
440 lines
12 KiB
JavaScript
440 lines
12 KiB
JavaScript
/*\
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title: $:/core/modules/utils/utils.js
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type: application/javascript
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module-type: utils
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Various static utility functions.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Trim whitespace from the start and end of a string
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Thanks to Steven Levithan, http://blog.stevenlevithan.com/archives/faster-trim-javascript
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*/
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exports.trim = function(str) {
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if(typeof str === "string") {
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return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
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} else {
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return str;
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}
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};
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/*
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Return the number of keys in an object
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*/
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exports.count = function(object) {
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var s = 0;
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$tw.utils.each(object,function() {s++;});
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return s;
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};
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/*
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Push entries onto an array, removing them first if they already exist in the array
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array: array to modify
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value: a single value to push or an array of values to push
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*/
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exports.pushTop = function(array,value) {
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var t,p;
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if($tw.utils.isArray(value)) {
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// Remove any array entries that are duplicated in the new values
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for(t=0; t<value.length; t++) {
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p = array.indexOf(value[t]);
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if(p !== -1) {
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array.splice(p,1);
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}
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}
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// Push the values on top of the main array
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array.push.apply(array,value);
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} else {
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p = array.indexOf(value);
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if(p !== -1) {
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array.splice(p,1);
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}
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array.push(value);
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}
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};
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/*
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Remove entries from an array
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array: array to modify
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value: a single value to remove, or an array of values to remove
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*/
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exports.removeArrayEntries = function(array,value) {
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var t,p;
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if($tw.utils.isArray(value)) {
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for(t=0; t<value.length; t++) {
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p = array.indexOf(value[t]);
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if(p !== -1) {
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array.splice(p,1);
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}
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}
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} else {
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p = array.indexOf(value);
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if(p !== -1) {
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array.splice(p,1);
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}
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}
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};
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/*
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Check whether any members of a hashmap are present in another hashmap
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*/
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exports.checkDependencies = function(dependencies,changes) {
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var hit = false;
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$tw.utils.each(changes,function(change,title) {
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if($tw.utils.hop(dependencies,title)) {
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hit = true;
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}
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});
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return hit;
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};
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exports.extend = function(object /* [, src] */) {
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$tw.utils.each(Array.prototype.slice.call(arguments, 1), function(source) {
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if(source) {
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for(var property in source) {
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object[property] = source[property];
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}
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}
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});
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return object;
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};
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exports.deepCopy = function(object) {
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var result,t;
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if($tw.utils.isArray(object)) {
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// Copy arrays
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result = object.slice(0);
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} else if(typeof object === "object") {
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result = {};
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for(t in object) {
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if(object[t] !== undefined) {
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result[t] = $tw.utils.deepCopy(object[t]);
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}
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}
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} else {
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result = object;
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}
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return result;
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};
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exports.extendDeepCopy = function(object,extendedProperties) {
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var result = $tw.utils.deepCopy(object),t;
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for(t in extendedProperties) {
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if(extendedProperties[t] !== undefined) {
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result[t] = $tw.utils.deepCopy(extendedProperties[t]);
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}
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}
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return result;
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};
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exports.slowInSlowOut = function(t) {
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return (1 - ((Math.cos(t * Math.PI) + 1) / 2));
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};
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exports.formatDateString = function (date,template) {
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var t = template.replace(/0hh12/g,$tw.utils.pad($tw.utils.getHours12(date)));
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t = t.replace(/hh12/g,$tw.utils.getHours12(date));
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t = t.replace(/0hh/g,$tw.utils.pad(date.getHours()));
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t = t.replace(/hh/g,date.getHours());
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t = t.replace(/mmm/g,$tw.config.dateFormats.shortMonths[date.getMonth()]);
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t = t.replace(/0mm/g,$tw.utils.pad(date.getMinutes()));
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t = t.replace(/mm/g,date.getMinutes());
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t = t.replace(/0ss/g,$tw.utils.pad(date.getSeconds()));
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t = t.replace(/ss/g,date.getSeconds());
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t = t.replace(/[ap]m/g,$tw.utils.getAmPm(date).toLowerCase());
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t = t.replace(/[AP]M/g,$tw.utils.getAmPm(date).toUpperCase());
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t = t.replace(/wYYYY/g,$tw.utils.getYearForWeekNo(date));
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t = t.replace(/wYY/g,$tw.utils.pad($tw.utils.getYearForWeekNo(date)-2000));
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t = t.replace(/YYYY/g,date.getFullYear());
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t = t.replace(/YY/g,$tw.utils.pad(date.getFullYear()-2000));
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t = t.replace(/MMM/g,$tw.config.dateFormats.months[date.getMonth()]);
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t = t.replace(/0MM/g,$tw.utils.pad(date.getMonth()+1));
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t = t.replace(/MM/g,date.getMonth()+1);
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t = t.replace(/0WW/g,$tw.utils.pad($tw.utils.getWeek(date)));
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t = t.replace(/WW/g,$tw.utils.getWeek(date));
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t = t.replace(/DDD/g,$tw.config.dateFormats.days[date.getDay()]);
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t = t.replace(/ddd/g,$tw.config.dateFormats.shortDays[date.getDay()]);
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t = t.replace(/0DD/g,$tw.utils.pad(date.getDate()));
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t = t.replace(/DDth/g,date.getDate()+$tw.utils.getDaySuffix(date));
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t = t.replace(/DD/g,date.getDate());
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var tz = date.getTimezoneOffset();
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var atz = Math.abs(tz);
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t = t.replace(/TZD/g,(tz < 0 ? '+' : '-') + $tw.utils.pad(Math.floor(atz / 60)) + ':' + $tw.utils.pad(atz % 60));
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t = t.replace(/\\(.)/g,"$1");
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return t;
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};
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exports.getAmPm = function(date) {
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return date.getHours() >= 12 ? $tw.config.dateFormats.pm : $tw.config.dateFormats.am;
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};
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exports.getDaySuffix = function(date) {
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return $tw.config.dateFormats.daySuffixes[date.getDate()-1];
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};
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exports.getWeek = function(date) {
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var dt = new Date(date.getTime());
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var d = dt.getDay();
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if(d === 0) d=7;// JavaScript Sun=0, ISO Sun=7
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dt.setTime(dt.getTime()+(4-d)*86400000);// shift day to Thurs of same week to calculate weekNo
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var n = Math.floor((dt.getTime()-new Date(dt.getFullYear(),0,1)+3600000)/86400000);
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return Math.floor(n/7)+1;
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};
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exports.getYearForWeekNo = function(date) {
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var dt = new Date(date.getTime());
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var d = dt.getDay();
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if(d === 0) d=7;// JavaScript Sun=0, ISO Sun=7
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dt.setTime(dt.getTime()+(4-d)*86400000);// shift day to Thurs of same week
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return dt.getFullYear();
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};
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exports.getHours12 = function(date) {
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var h = date.getHours();
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return h > 12 ? h-12 : ( h > 0 ? h : 12 );
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};
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/*
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Convert a date delta in milliseconds into a string representation of "23 seconds ago", "27 minutes ago" etc.
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delta: delta in milliseconds
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Returns an object with these members:
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description: string describing the delta period
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updatePeriod: time in millisecond until the string will be inaccurate
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*/
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exports.getRelativeDate = function(delta) {
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var futurep = false;
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if(delta < 0) {
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delta = -1 * delta;
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futurep = true;
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}
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var units = [
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{name: "years", duration: 365 * 24 * 60 * 60 * 1000},
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{name: "months", duration: (365/12) * 24 * 60 * 60 * 1000},
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{name: "days", duration: 24 * 60 * 60 * 1000},
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{name: "hours", duration: 60 * 60 * 1000},
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{name: "minutes", duration: 60 * 1000},
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{name: "seconds", duration: 1000}
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];
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for(var t=0; t<units.length; t++) {
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var result = Math.floor(delta / units[t].duration);
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if(result >= 2) {
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var desc = result + " " + units[t].name;
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if(futurep) {
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desc = desc + " from now";
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} else {
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desc = desc + " ago";
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}
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return {
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delta: delta,
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description: desc,
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updatePeriod: units[t].duration
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};
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}
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}
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return {
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delta: delta,
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description: "1 second ago",
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updatePeriod: 1000
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};
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};
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// Convert & to "&", < to "<", > to ">" and " to """
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exports.htmlEncode = function(s) {
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if(s) {
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return s.toString().replace(/&/mg,"&").replace(/</mg,"<").replace(/>/mg,">").replace(/\"/mg,""");
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} else {
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return "";
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}
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};
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// Converts all HTML entities to their character equivalents
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exports.entityDecode = function(s) {
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var e = s.substr(1,s.length-2); // Strip the & and the ;
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if(e.charAt(0) === "#") {
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if(e.charAt(1) === "x" || e.charAt(1) === "X") {
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return String.fromCharCode(parseInt(e.substr(2),16));
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} else {
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return String.fromCharCode(parseInt(e.substr(1),10));
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}
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} else {
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var c = $tw.config.htmlEntities[e];
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if(c) {
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return String.fromCharCode(c);
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} else {
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return s; // Couldn't convert it as an entity, just return it raw
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}
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}
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};
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exports.unescapeLineBreaks = function(s) {
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return s.replace(/\\n/mg,"\n").replace(/\\b/mg," ").replace(/\\s/mg,"\\").replace(/\r/mg,"");
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};
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/*
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* Returns an escape sequence for given character. Uses \x for characters <=
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* 0xFF to save space, \u for the rest.
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*
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* The code needs to be in sync with th code template in the compilation
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* function for "action" nodes.
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*/
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// Copied from peg.js, thanks to David Majda
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exports.escape = function(ch) {
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var charCode = ch.charCodeAt(0);
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if(charCode <= 0xFF) {
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return '\\x' + $tw.utils.pad(charCode.toString(16).toUpperCase());
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} else {
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return '\\u' + $tw.utils.pad(charCode.toString(16).toUpperCase(),4);
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}
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};
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// Turns a string into a legal JavaScript string
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// Copied from peg.js, thanks to David Majda
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exports.stringify = function(s) {
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/*
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* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
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* literal except for the closing quote character, backslash, carriage return,
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* line separator, paragraph separator, and line feed. Any character may
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* appear in the form of an escape sequence.
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*
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* For portability, we also escape escape all non-ASCII characters.
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*/
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return s
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.replace(/\\/g, '\\\\') // backslash
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.replace(/"/g, '\\"') // double quote character
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.replace(/'/g, "\\'") // single quote character
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.replace(/\r/g, '\\r') // carriage return
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.replace(/\n/g, '\\n') // line feed
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.replace(/[\x80-\uFFFF]/g, exports.escape); // non-ASCII characters
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};
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/*
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Escape the RegExp special characters with a preceding backslash
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*/
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exports.escapeRegExp = function(s) {
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return s.replace(/[\-\/\\\^\$\*\+\?\.\(\)\|\[\]\{\}]/g, '\\$&');
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};
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exports.nextTick = function(fn) {
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/*global window: false */
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if(typeof window !== "undefined") {
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// Apparently it would be faster to use postMessage - http://dbaron.org/log/20100309-faster-timeouts
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window.setTimeout(fn,4);
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} else {
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process.nextTick(fn);
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}
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};
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/*
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Convert a hyphenated CSS property name into a camel case one
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*/
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exports.unHyphenateCss = function(propName) {
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return propName.replace(/-([a-z])/gi, function(match0,match1) {
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return match1.toUpperCase();
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});
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};
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/*
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Convert a camelcase CSS property name into a dashed one ("backgroundColor" --> "background-color")
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*/
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exports.hyphenateCss = function(propName) {
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return propName.replace(/([A-Z])/g, function(match0,match1) {
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return "-" + match1.toLowerCase();
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});
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};
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/*
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Parse a text reference of one of these forms:
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* title
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* !!field
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* title!!field
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* title##index
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* etc
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Returns an object with the following fields, all optional:
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* title: tiddler title
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* field: tiddler field name
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* index: JSON property index
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*/
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exports.parseTextReference = function(textRef) {
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// Separate out the title, field name and/or JSON indices
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var reTextRef = /^\s*([^!#]+)?(?:(?:!!([^\s]+))|(?:##([^\s]+)))?\s*/mg,
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match = reTextRef.exec(textRef);
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if(match && reTextRef.lastIndex === textRef.length) {
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// Return the parts
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return {
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title: match[1],
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field: match[2],
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index: match[3]
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};
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} else {
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// If we couldn't parse it (eg it started with a)
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return {
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title: textRef
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};
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}
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};
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/*
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Extract the version number from the meta tag or from the boot file
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*/
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if($tw.browser) {
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// Browser version
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exports.extractVersionInfo = function() {
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var metatags = document.getElementsByTagName("meta");
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for(var t=0; t<metatags.length; t++) {
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var m = metatags[t];
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if(m.name === "tiddlywiki-version") {
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return m.content;
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}
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}
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return null;
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};
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} else {
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// Server version
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exports.extractVersionInfo = function() {
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return $tw.packageInfo.version;
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};
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}
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/*
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Get the animation duration in ms
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*/
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exports.getAnimationDuration = function() {
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return parseInt($tw.wiki.getTiddlerText("$:/config/AnimationDuration","400"),10);
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};
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/*
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Hash a string to a number
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Derived from http://stackoverflow.com/a/15710692
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*/
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exports.hashString = function(str) {
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return str.split("").reduce(function(a,b) {
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a = ((a << 5) - a) + b.charCodeAt(0);
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return a & a;
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},0);
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};
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/*
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Decode a base64 string
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*/
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exports.base64Decode = function(string64) {
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if($tw.browser) {
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// TODO
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throw "$tw.utils.base64Decode() doesn't work in the browser";
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} else {
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return (new Buffer(string64,"base64")).toString();
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}
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};
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})();
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