mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-27 02:20:28 +00:00
553 lines
19 KiB
JavaScript
553 lines
19 KiB
JavaScript
/* TiddlyWiki: modifications to the original library are commented like this */
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/*
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Railroad Diagrams
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by Tab Atkins Jr. (and others)
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http://xanthir.com
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http://twitter.com/tabatkins
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http://github.com/tabatkins/railroad-diagrams
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This document and all associated files in the github project are licensed under CC0: http://creativecommons.org/publicdomain/zero/1.0/
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This means you can reuse, remix, or otherwise appropriate this project for your own use WITHOUT RESTRICTION.
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(The actual legal meaning can be found at the above link.)
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Don't ask me for permission to use any part of this project, JUST USE IT.
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I would appreciate attribution, but that is not required by the license.
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*/
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/*
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This file uses a module pattern to avoid leaking names into the global scope.
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The only accidental leakage is the name "temp".
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The exported names can be found at the bottom of this file;
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simply change the names in the array of strings to change what they are called in your application.
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As well, several configuration constants are passed into the module function at the bottom of this file.
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At runtime, these constants can be found on the Diagram class.
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*/
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var temp = (function(options) {
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function subclassOf(baseClass, superClass) {
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baseClass.prototype = Object.create(superClass.prototype);
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baseClass.prototype.$super = superClass.prototype;
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}
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function unnull(/* children */) {
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return [].slice.call(arguments).reduce(function(sofar, x) { return sofar !== undefined ? sofar : x; });
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}
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function determineGaps(outer, inner) {
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var diff = outer - inner;
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switch(Diagram.INTERNAL_ALIGNMENT) {
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case 'left': return [0, diff]; break;
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case 'right': return [diff, 0]; break;
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case 'center':
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default: return [diff/2, diff/2]; break;
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}
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}
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function wrapString(value) {
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return ((typeof value) == 'string') ? new Terminal(value) : value;
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}
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function SVG(name, attrs, text) {
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attrs = attrs || {};
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text = text || '';
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var el = document.createElementNS("http://www.w3.org/2000/svg",name);
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for(var attr in attrs) {
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el.setAttribute(attr, attrs[attr]);
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}
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el.textContent = text;
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return el;
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}
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function FakeSVG(tagName, attrs, text){
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if(!(this instanceof FakeSVG)) return new FakeSVG(tagName, attrs, text);
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if(text) this.children = text;
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else this.children = [];
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this.tagName = tagName;
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this.attrs = unnull(attrs, {});
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return this;
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};
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FakeSVG.prototype.format = function(x, y, width) {
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// Virtual
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};
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FakeSVG.prototype.addTo = function(parent) {
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if(parent instanceof FakeSVG) {
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parent.children.push(this);
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return this;
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} else {
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var svg = this.toSVG();
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parent.appendChild(svg);
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return svg;
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}
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};
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FakeSVG.prototype.toSVG = function() {
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var el = SVG(this.tagName, this.attrs);
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if(typeof this.children == 'string') {
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el.textContent = this.children;
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} else {
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this.children.forEach(function(e) {
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el.appendChild(e.toSVG());
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});
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}
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return el;
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};
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FakeSVG.prototype.toString = function() {
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var str = '<' + this.tagName;
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var group = this.tagName == "g" || this.tagName == "svg";
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for(var attr in this.attrs) {
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str += ' ' + attr + '="' + (this.attrs[attr]+'').replace(/&/g, '&').replace(/"/g, '"') + '"';
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}
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str += '>';
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if(group) str += "\n";
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if(typeof this.children == 'string') {
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str += this.children.replace(/&/g, '&').replace(/</g, '<');
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} else {
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this.children.forEach(function(e) {
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str += e;
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});
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}
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str += '</' + this.tagName + '>\n';
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return str;
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}
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function Path(x,y,attrs) {
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if(!(this instanceof Path)) return new Path(x,y,attrs);
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FakeSVG.call(this, 'path', attrs);
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this.attrs.d = "M"+x+' '+y;
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}
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subclassOf(Path, FakeSVG);
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Path.prototype.m = function(x,y) {
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this.attrs.d += 'm'+x+' '+y;
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return this;
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}
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Path.prototype.h = function(val) {
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this.attrs.d += 'h'+val;
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return this;
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}
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Path.prototype.right = Path.prototype.h;
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Path.prototype.left = function(val) { return this.h(-val); }
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Path.prototype.v = function(val) {
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this.attrs.d += 'v'+val;
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return this;
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}
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Path.prototype.down = Path.prototype.v;
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Path.prototype.up = function(val) { return this.v(-val); }
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Path.prototype.arc = function(sweep){
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var x = Diagram.ARC_RADIUS;
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var y = Diagram.ARC_RADIUS;
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if(sweep[0] == 'e' || sweep[1] == 'w') {
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x *= -1;
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}
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if(sweep[0] == 's' || sweep[1] == 'n') {
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y *= -1;
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}
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if(sweep == 'ne' || sweep == 'es' || sweep == 'sw' || sweep == 'wn') {
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var cw = 1;
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} else {
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var cw = 0;
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}
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this.attrs.d += "a"+Diagram.ARC_RADIUS+" "+Diagram.ARC_RADIUS+" 0 0 "+cw+' '+x+' '+y;
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return this;
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}
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Path.prototype.format = function() {
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// All paths in this library start/end horizontally.
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// The extra .5 ensures a minor overlap, so there's no seams in bad rasterizers.
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this.attrs.d += 'h.5';
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return this;
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}
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/* TiddlyWiki: added support for arbitrary straight lines */
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Path.prototype.line = function(dx,dy) {
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this.attrs.d += "l"+dx+" "+dy;
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return this;
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}
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/* TiddlyWiki: added twOptions parameter, passing it to Start() and End() */
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function Diagram(twOptions, items) {
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if(!(this instanceof Diagram)) return new Diagram(twOptions, [].slice.call(arguments,1));
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FakeSVG.call(this, 'svg', {class: Diagram.DIAGRAM_CLASS});
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this.items = items.map(wrapString);
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this.items.unshift(new Start(twOptions.start));
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this.items.push(new End(twOptions.end));
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this.width = this.items.reduce(function(sofar, el) { return sofar + el.width + (el.needsSpace?20:0)}, 0)+1;
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this.up = Math.max.apply(null, this.items.map(function (x) { return x.up; }));
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this.down = Math.max.apply(null, this.items.map(function (x) { return x.down; }));
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this.formatted = false;
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}
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subclassOf(Diagram, FakeSVG);
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for(var option in options) {
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Diagram[option] = options[option];
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}
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Diagram.prototype.format = function(paddingt, paddingr, paddingb, paddingl) {
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paddingt = unnull(paddingt, 20);
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paddingr = unnull(paddingr, paddingt, 20);
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paddingb = unnull(paddingb, paddingt, 20);
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paddingl = unnull(paddingl, paddingr, 20);
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var x = paddingl;
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var y = paddingt;
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y += this.up;
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var g = FakeSVG('g', Diagram.STROKE_ODD_PIXEL_LENGTH ? {transform:'translate(.5 .5)'} : {});
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for(var i = 0; i < this.items.length; i++) {
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var item = this.items[i];
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if(item.needsSpace) {
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Path(x,y).h(10).addTo(g);
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x += 10;
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}
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item.format(x, y, item.width).addTo(g);
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x += item.width;
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if(item.needsSpace) {
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Path(x,y).h(10).addTo(g);
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x += 10;
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}
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}
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this.attrs.width = this.width + paddingl + paddingr;
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this.attrs.height = this.up + this.down + paddingt + paddingb;
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this.attrs.viewBox = "0 0 " + this.attrs.width + " " + this.attrs.height;
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g.addTo(this);
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this.formatted = true;
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return this;
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}
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Diagram.prototype.addTo = function(parent) {
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var scriptTag = document.getElementsByTagName('script');
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scriptTag = scriptTag[scriptTag.length - 1];
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var parentTag = scriptTag.parentNode;
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parent = parent || parentTag;
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return this.$super.addTo.call(this, parent);
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}
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Diagram.prototype.toSVG = function() {
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if (!this.formatted) {
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this.format();
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}
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return this.$super.toSVG.call(this);
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}
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Diagram.prototype.toString = function() {
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if (!this.formatted) {
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this.format();
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}
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return this.$super.toString.call(this);
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}
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function Sequence(items) {
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if(!(this instanceof Sequence)) return new Sequence([].slice.call(arguments));
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FakeSVG.call(this, 'g');
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this.items = items.map(wrapString);
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this.width = this.items.reduce(function(sofar, el) { return sofar + el.width + (el.needsSpace?20:0)}, 0);
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this.up = this.items.reduce(function(sofar,el) { return Math.max(sofar, el.up)}, 0);
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this.down = this.items.reduce(function(sofar,el) { return Math.max(sofar, el.down)}, 0);
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}
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subclassOf(Sequence, FakeSVG);
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Sequence.prototype.format = function(x,y,width) {
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// Hook up the two sides if this is narrower than its stated width.
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var gaps = determineGaps(width, this.width);
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Path(x,y).h(gaps[0]).addTo(this);
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Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
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x += gaps[0];
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for(var i = 0; i < this.items.length; i++) {
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var item = this.items[i];
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if(item.needsSpace) {
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Path(x,y).h(10).addTo(this);
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x += 10;
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}
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item.format(x, y, item.width).addTo(this);
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x += item.width;
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if(item.needsSpace) {
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Path(x,y).h(10).addTo(this);
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x += 10;
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}
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}
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return this;
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}
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function Choice(normal, items) {
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if(!(this instanceof Choice)) return new Choice(normal, [].slice.call(arguments,1));
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FakeSVG.call(this, 'g');
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if( typeof normal !== "number" || normal !== Math.floor(normal) ) {
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throw new TypeError("The first argument of Choice() must be an integer.");
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} else if(normal < 0 || normal >= items.length) {
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throw new RangeError("The first argument of Choice() must be an index for one of the items.");
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} else {
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this.normal = normal;
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}
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this.items = items.map(wrapString);
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this.width = this.items.reduce(function(sofar, el){return Math.max(sofar, el.width)},0) + Diagram.ARC_RADIUS*4;
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this.up = this.down = 0;
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for(var i = 0; i < this.items.length; i++) {
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var item = this.items[i];
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if(i < normal) { this.up += Math.max(Diagram.ARC_RADIUS,item.up + item.down + Diagram.VERTICAL_SEPARATION); }
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if(i == normal) { this.up += Math.max(Diagram.ARC_RADIUS, item.up); this.down += Math.max(Diagram.ARC_RADIUS, item.down); }
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if(i > normal) { this.down += Math.max(Diagram.ARC_RADIUS,Diagram.VERTICAL_SEPARATION + item.up + item.down); }
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}
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}
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subclassOf(Choice, FakeSVG);
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Choice.prototype.format = function(x,y,width) {
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// Hook up the two sides if this is narrower than its stated width.
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var gaps = determineGaps(width, this.width);
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Path(x,y).h(gaps[0]).addTo(this);
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Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
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x += gaps[0];
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var last = this.items.length -1;
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var innerWidth = this.width - Diagram.ARC_RADIUS*4;
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// Do the elements that curve above
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for(var i = this.normal - 1; i >= 0; i--) {
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var item = this.items[i];
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if( i == this.normal - 1 ) {
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var distanceFromY = Math.max(Diagram.ARC_RADIUS*2, this.items[i+1].up + Diagram.VERTICAL_SEPARATION + item.down);
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}
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Path(x,y).arc('se').up(distanceFromY - Diagram.ARC_RADIUS*2).arc('wn').addTo(this);
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item.format(x+Diagram.ARC_RADIUS*2,y - distanceFromY,innerWidth).addTo(this);
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Path(x+Diagram.ARC_RADIUS*2+innerWidth, y-distanceFromY).arc('ne').down(distanceFromY - Diagram.ARC_RADIUS*2).arc('ws').addTo(this);
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distanceFromY += Math.max(Diagram.ARC_RADIUS, item.up + Diagram.VERTICAL_SEPARATION + (i == 0 ? 0 : this.items[i-1].down));
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}
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// Do the straight-line path.
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Path(x,y).right(Diagram.ARC_RADIUS*2).addTo(this);
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this.items[this.normal].format(x+Diagram.ARC_RADIUS*2, y, innerWidth).addTo(this);
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Path(x+Diagram.ARC_RADIUS*2+innerWidth, y).right(Diagram.ARC_RADIUS*2).addTo(this);
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// Do the elements that curve below
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for(var i = this.normal+1; i <= last; i++) {
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var item = this.items[i];
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if( i == this.normal + 1 ) {
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var distanceFromY = Math.max(Diagram.ARC_RADIUS*2, this.items[i-1].down + Diagram.VERTICAL_SEPARATION + item.up);
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}
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Path(x,y).arc('ne').down(distanceFromY - Diagram.ARC_RADIUS*2).arc('ws').addTo(this);
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item.format(x+Diagram.ARC_RADIUS*2, y+distanceFromY, innerWidth).addTo(this);
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Path(x+Diagram.ARC_RADIUS*2+innerWidth, y+distanceFromY).arc('se').up(distanceFromY - Diagram.ARC_RADIUS*2).arc('wn').addTo(this);
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distanceFromY += Math.max(Diagram.ARC_RADIUS, item.down + Diagram.VERTICAL_SEPARATION + (i == last ? 0 : this.items[i+1].up));
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}
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return this;
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}
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function Optional(item, skip) {
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if( skip === undefined )
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return Choice(1, Skip(), item);
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else if ( skip === "skip" )
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return Choice(0, Skip(), item);
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else
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throw "Unknown value for Optional()'s 'skip' argument.";
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}
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/* TiddlyWiki: added wantArrow */
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function OneOrMore(item, rep, wantArrow) {
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if(!(this instanceof OneOrMore)) return new OneOrMore(item, rep, wantArrow);
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FakeSVG.call(this, 'g');
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/* TiddlyWiki: code added */
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this.wantArrow = wantArrow;
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rep = rep || (new Skip);
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this.item = wrapString(item);
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this.rep = wrapString(rep);
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this.width = Math.max(this.item.width, this.rep.width) + Diagram.ARC_RADIUS*2;
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this.up = this.item.up;
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this.down = Math.max(Diagram.ARC_RADIUS*2, this.item.down + Diagram.VERTICAL_SEPARATION + this.rep.up + this.rep.down);
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/* TiddlyWiki: moved calculation of distanceFromY (of the repeat arc) to here */
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this.distanceFromY = Math.max(Diagram.ARC_RADIUS*2, this.item.down+Diagram.VERTICAL_SEPARATION+this.rep.up);
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}
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subclassOf(OneOrMore, FakeSVG);
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OneOrMore.prototype.needsSpace = true;
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OneOrMore.prototype.format = function(x,y,width) {
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// Hook up the two sides if this is narrower than its stated width.
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var gaps = determineGaps(width, this.width);
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Path(x,y).h(gaps[0]).addTo(this);
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Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
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x += gaps[0];
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// Draw item
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Path(x,y).right(Diagram.ARC_RADIUS).addTo(this);
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this.item.format(x+Diagram.ARC_RADIUS,y,this.width-Diagram.ARC_RADIUS*2).addTo(this);
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Path(x+this.width-Diagram.ARC_RADIUS,y).right(Diagram.ARC_RADIUS).addTo(this);
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// Draw repeat arc
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/* TiddlyWiki: moved calculation of distanceFromY from here to constructor */
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var distanceFromY = this.distanceFromY;
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Path(x+Diagram.ARC_RADIUS,y).arc('nw').down(distanceFromY-Diagram.ARC_RADIUS*2).arc('ws').addTo(this);
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this.rep.format(x+Diagram.ARC_RADIUS, y+distanceFromY, this.width - Diagram.ARC_RADIUS*2).addTo(this);
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Path(x+this.width-Diagram.ARC_RADIUS, y+distanceFromY).arc('se').up(distanceFromY-Diagram.ARC_RADIUS*2).arc('en').addTo(this);
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/* TiddlyWiki: code added */
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if(this.wantArrow) {
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var arrowSize = Diagram.ARC_RADIUS/2;
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// Compensate for the illusion that makes the arrow look unbalanced if it's too close to the curve below it
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var multiplier = (distanceFromY < arrowSize*5) ? 1.2 : 1;
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Path(x-arrowSize, y+distanceFromY/2 + arrowSize/2, {class:"arrow"}).
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line(arrowSize, -arrowSize).line(arrowSize*multiplier, arrowSize).addTo(this);
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}
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return this;
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}
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function ZeroOrMore(item, rep, skip, wantArrow) {
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return Optional(OneOrMore(item, rep, wantArrow), skip);
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}
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/* TiddlyWiki: added type parameter */
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function Start(type) {
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if(!(this instanceof Start)) return new Start(type);
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FakeSVG.call(this, 'path');
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this.type = type || 'single'
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this.width = (this.type === 'double') ? 20 : 10;
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this.up = 10;
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this.down = 10;
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}
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subclassOf(Start, FakeSVG);
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Start.prototype.format = function(x,y) {
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/* TiddlyWiki: added types */
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if(this.type === 'single') {
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this.attrs.d = 'M '+x+' '+(y-10)+' v 20 m 0 -10 h 10.5';
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} else if(this.type === 'double') {
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this.attrs.d = 'M '+x+' '+(y-10)+' v 20 m 10 -20 v 20 m -10 -10 h 20.5';
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} else { // 'none'
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this.attrs.d = 'M '+x+' '+y+' h 10.5';
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}
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return this;
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}
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/* TiddlyWiki: added type parameter */
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function End(type) {
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if(!(this instanceof End)) return new End(type);
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FakeSVG.call(this, 'path');
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this.type = type || 'double';
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this.width = (this.type === 'double') ? 20 : 10;
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this.up = 10;
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this.down = 10;
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}
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subclassOf(End, FakeSVG);
|
|
End.prototype.format = function(x,y) {
|
|
/* TiddlyWiki: added types */
|
|
if(this.type === 'single') {
|
|
this.attrs.d = 'M '+x+' '+y+' h 10 m 0 -10 v 20';
|
|
} else if(this.type === 'double') {
|
|
this.attrs.d = 'M '+x+' '+y+' h 20 m -10 -10 v 20 m 10 -20 v 20';
|
|
} else { // 'none'
|
|
this.attrs.d = 'M '+x+' '+y+' h 10';
|
|
}
|
|
return this;
|
|
}
|
|
|
|
function Terminal(text) {
|
|
if(!(this instanceof Terminal)) return new Terminal(text);
|
|
FakeSVG.call(this, 'g');
|
|
this.text = text;
|
|
this.width = text.length * 8 + 20; /* Assume that each char is .5em, and that the em is 16px */
|
|
this.up = 11;
|
|
this.down = 11;
|
|
}
|
|
subclassOf(Terminal, FakeSVG);
|
|
Terminal.prototype.needsSpace = true;
|
|
Terminal.prototype.format = function(x, y, width) {
|
|
// Hook up the two sides if this is narrower than its stated width.
|
|
var gaps = determineGaps(width, this.width);
|
|
Path(x,y).h(gaps[0]).addTo(this);
|
|
Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
|
|
x += gaps[0];
|
|
|
|
FakeSVG('rect', {x:x, y:y-11, width:this.width, height:this.up+this.down, rx:10, ry:10}).addTo(this);
|
|
FakeSVG('text', {x:x+this.width/2, y:y+4}, this.text).addTo(this);
|
|
return this;
|
|
}
|
|
|
|
function NonTerminal(text) {
|
|
if(!(this instanceof NonTerminal)) return new NonTerminal(text);
|
|
FakeSVG.call(this, 'g');
|
|
this.text = text;
|
|
this.width = text.length * 8 + 20;
|
|
this.up = 11;
|
|
this.down = 11;
|
|
}
|
|
subclassOf(NonTerminal, FakeSVG);
|
|
NonTerminal.prototype.needsSpace = true;
|
|
NonTerminal.prototype.format = function(x, y, width) {
|
|
// Hook up the two sides if this is narrower than its stated width.
|
|
var gaps = determineGaps(width, this.width);
|
|
Path(x,y).h(gaps[0]).addTo(this);
|
|
Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
|
|
x += gaps[0];
|
|
|
|
FakeSVG('rect', {x:x, y:y-11, width:this.width, height:this.up+this.down}).addTo(this);
|
|
FakeSVG('text', {x:x+this.width/2, y:y+4}, this.text).addTo(this);
|
|
return this;
|
|
}
|
|
|
|
function Comment(text) {
|
|
if(!(this instanceof Comment)) return new Comment(text);
|
|
FakeSVG.call(this, 'g');
|
|
this.text = text;
|
|
this.width = text.length * 7 + 10;
|
|
this.up = 11;
|
|
this.down = 11;
|
|
}
|
|
subclassOf(Comment, FakeSVG);
|
|
Comment.prototype.needsSpace = true;
|
|
Comment.prototype.format = function(x, y, width) {
|
|
// Hook up the two sides if this is narrower than its stated width.
|
|
var gaps = determineGaps(width, this.width);
|
|
Path(x,y).h(gaps[0]).addTo(this);
|
|
Path(x+gaps[0]+this.width,y).h(gaps[1]).addTo(this);
|
|
x += gaps[0];
|
|
|
|
FakeSVG('text', {x:x+this.width/2, y:y+5, class:'comment'}, this.text).addTo(this);
|
|
return this;
|
|
}
|
|
|
|
function Skip() {
|
|
if(!(this instanceof Skip)) return new Skip();
|
|
FakeSVG.call(this, 'g');
|
|
this.width = 0;
|
|
this.up = 0;
|
|
this.down = 0;
|
|
}
|
|
subclassOf(Skip, FakeSVG);
|
|
Skip.prototype.format = function(x, y, width) {
|
|
Path(x,y).right(width).addTo(this);
|
|
return this;
|
|
}
|
|
|
|
/* TiddlyWiki: added linking ability */
|
|
function Link(item,options) {
|
|
if(!(this instanceof Link)) return new Link(item,options);
|
|
FakeSVG.call(this,'a',options);
|
|
this.item = item;
|
|
this.width = item.width;
|
|
this.up = item.up;
|
|
this.down = item.down;
|
|
}
|
|
subclassOf(Link, FakeSVG);
|
|
Link.prototype.needsSpace = true;
|
|
Link.prototype.format = function(x, y, width) {
|
|
this.item.format(x,y,width).addTo(this);
|
|
return this;
|
|
}
|
|
|
|
/* TiddlyWiki: this block replaces the export mechanism in the original library */
|
|
if (exports) {
|
|
exports.Diagram = Diagram;
|
|
exports.Sequence = Sequence;
|
|
exports.Choice = Choice;
|
|
exports.Optional = Optional;
|
|
exports.OneOrMore = OneOrMore;
|
|
exports.ZeroOrMore = ZeroOrMore;
|
|
exports.Terminal = Terminal;
|
|
exports.NonTerminal = NonTerminal;
|
|
exports.Comment = Comment;
|
|
exports.Skip = Skip;
|
|
exports.Link = Link;
|
|
};
|
|
})(
|
|
{
|
|
VERTICAL_SEPARATION: 8,
|
|
ARC_RADIUS: 10,
|
|
DIAGRAM_CLASS: 'railroad-diagram',
|
|
STROKE_ODD_PIXEL_LENGTH: true,
|
|
INTERNAL_ALIGNMENT: 'center',
|
|
}
|
|
);
|
|
|
|
/* TiddlyWiki: removed assignments to properties of the window object */
|