diff options
Diffstat (limited to 'assets/javascripts/vendor')
| -rw-r--r-- | assets/javascripts/vendor/canvasutilities.js | 145 | ||||
| -rw-r--r-- | assets/javascripts/vendor/tube.js | 323 |
2 files changed, 468 insertions, 0 deletions
diff --git a/assets/javascripts/vendor/canvasutilities.js b/assets/javascripts/vendor/canvasutilities.js new file mode 100644 index 0000000..011ebb0 --- /dev/null +++ b/assets/javascripts/vendor/canvasutilities.js @@ -0,0 +1,145 @@ +var drawArrow = function(ctx, x1, y1, x2, y2, style, which, angle, d) { + 'use strict'; + // Ceason pointed to a problem when x1 or y1 were a string, and concatenation + // would happen instead of addition + if (typeof(x1) == 'string') x1 = parseInt(x1); + if (typeof(y1) == 'string') y1 = parseInt(y1); + if (typeof(x2) == 'string') x2 = parseInt(x2); + if (typeof(y2) == 'string') y2 = parseInt(y2); + style = typeof(style) != 'undefined' ? style : 3; + which = typeof(which) != 'undefined' ? which : 1; // end point gets arrow + angle = typeof(angle) != 'undefined' ? angle : Math.PI / 8; + d = typeof(d) != 'undefined' ? d : 10; + // default to using drawHead to draw the head, but if the style + // argument is a function, use it instead + var toDrawHead = typeof(style) != 'function' ? drawHead : style; + + // For ends with arrow we actually want to stop before we get to the arrow + // so that wide lines won't put a flat end on the arrow. + // + var dist = Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1)); + var ratio = (dist - d / 3) / dist; + var tox, toy, fromx, fromy; + if (which & 1) { + tox = Math.round(x1 + (x2 - x1) * ratio); + toy = Math.round(y1 + (y2 - y1) * ratio); + } else { + tox = x2; + toy = y2; + } + if (which & 2) { + fromx = x1 + (x2 - x1) * (1 - ratio); + fromy = y1 + (y2 - y1) * (1 - ratio); + } else { + fromx = x1; + fromy = y1; + } + + // Draw the shaft of the arrow + ctx.beginPath(); + ctx.moveTo(fromx, fromy); + ctx.lineTo(tox, toy); + ctx.stroke(); + + // calculate the angle of the line + var lineangle = Math.atan2(y2 - y1, x2 - x1); + // h is the line length of a side of the arrow head + var h = Math.abs(d / Math.cos(angle)); + + if (which & 1) { // handle far end arrow head + var angle1 = lineangle + Math.PI + angle; + var topx = x2 + Math.cos(angle1) * h; + var topy = y2 + Math.sin(angle1) * h; + var angle2 = lineangle + Math.PI - angle; + var botx = x2 + Math.cos(angle2) * h; + var boty = y2 + Math.sin(angle2) * h; + toDrawHead(ctx, topx, topy, x2, y2, botx, boty, style); + } + if (which & 2) { // handle near end arrow head + var angle1 = lineangle + angle; + var topx = x1 + Math.cos(angle1) * h; + var topy = y1 + Math.sin(angle1) * h; + var angle2 = lineangle - angle; + var botx = x1 + Math.cos(angle2) * h; + var boty = y1 + Math.sin(angle2) * h; + toDrawHead(ctx, topx, topy, x1, y1, botx, boty, style); + } +} + +var drawHead = function(ctx, x0, y0, x1, y1, x2, y2, style) { + 'use strict'; + if (typeof(x0) == 'string') x0 = parseInt(x0); + if (typeof(y0) == 'string') y0 = parseInt(y0); + if (typeof(x1) == 'string') x1 = parseInt(x1); + if (typeof(y1) == 'string') y1 = parseInt(y1); + if (typeof(x2) == 'string') x2 = parseInt(x2); + if (typeof(y2) == 'string') y2 = parseInt(y2); + var radius = 3; + var twoPI = 2 * Math.PI; + + // all cases do this. + ctx.save(); + ctx.beginPath(); + ctx.moveTo(x0, y0); + ctx.lineTo(x1, y1); + ctx.lineTo(x2, y2); + switch (style) { + case 0: + // curved filled, add the bottom as an arcTo curve and fill + var backdist = Math.sqrt(((x2 - x0) * (x2 - x0)) + ((y2 - y0) * (y2 - y0))); + ctx.arcTo(x1, y1, x0, y0, .55 * backdist); + ctx.fill(); + break; + case 1: + // straight filled, add the bottom as a line and fill. + ctx.beginPath(); + ctx.moveTo(x0, y0); + ctx.lineTo(x1, y1); + ctx.lineTo(x2, y2); + ctx.lineTo(x0, y0); + ctx.fill(); + break; + case 2: + // unfilled head, just stroke. + ctx.stroke(); + break; + case 3: + //filled head, add the bottom as a quadraticCurveTo curve and fill + var cpx = (x0 + x1 + x2) / 3; + var cpy = (y0 + y1 + y2) / 3; + ctx.quadraticCurveTo(cpx, cpy, x0, y0); + ctx.fill(); + break; + case 4: + //filled head, add the bottom as a bezierCurveTo curve and fill + var cp1x, cp1y, cp2x, cp2y, backdist; + var shiftamt = 5; + if (x2 == x0) { + // Avoid a divide by zero if x2==x0 + backdist = y2 - y0; + cp1x = (x1 + x0) / 2; + cp2x = (x1 + x0) / 2; + cp1y = y1 + backdist / shiftamt; + cp2y = y1 - backdist / shiftamt; + } else { + backdist = Math.sqrt(((x2 - x0) * (x2 - x0)) + ((y2 - y0) * (y2 - y0))); + var xback = (x0 + x2) / 2; + var yback = (y0 + y2) / 2; + var xmid = (xback + x1) / 2; + var ymid = (yback + y1) / 2; + + var m = (y2 - y0) / (x2 - x0); + var dx = (backdist / (2 * Math.sqrt(m * m + 1))) / shiftamt; + var dy = m * dx; + cp1x = xmid - dx; + cp1y = ymid - dy; + cp2x = xmid + dx; + cp2y = ymid + dy; + } + + ctx.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x0, y0); + ctx.fill(); + break; + } + ctx.restore(); +} diff --git a/assets/javascripts/vendor/tube.js b/assets/javascripts/vendor/tube.js new file mode 100644 index 0000000..17d3bfd --- /dev/null +++ b/assets/javascripts/vendor/tube.js @@ -0,0 +1,323 @@ +var nextTick = (function(){ + // postMessage behaves badly on IE8 + if (window.ActiveXObject || !window.postMessage) { + var nextTick = function(fn) { + setTimeout(fn, 0); + } + } else { + // based on setZeroTimeout by David Baron + // - http://dbaron.org/log/20100309-faster-timeouts + var timeouts = [] + , name = 'next-tick-zero-timeout' + + window.addEventListener('message', function(e){ + if (e.source == window && e.data == name) { + if (e.stopPropagation) e.stopPropagation(); + if (timeouts.length) timeouts.shift()(); + } + }, true); + + var nextTick = function(fn){ + timeouts.push(fn); + window.postMessage(name, '*'); + } + } + + return nextTick; +})() + +var Uid = (function(){ + var id = 0 + return function(){ return id++ + "" } +})() + + +var tokenize = (function(){ + var tokenize = function(str, splitOn){ + return str + .trim() + .split(splitOn || tokenize.default); + }; + + tokenize.default = /\s+/g; + + return tokenize; +})() + +// globber("*".split(":"), "a:b:c".split(":")) => true +// globber("*:c".split(":"), "a:b:c".split(":")) => true +// globber("a:*".split(":"), "a:b:c".split(":")) => true +// globber("a:*:c".split(":"), "a:b:c".split(":")) => true + +// based on codegolf.stackexchange.com/questions/467/implement-glob-matcher +var globber = function(patterns, strings) { + // console.log("globber called with: " + patterns.join(":"), strings.join(":")) + var first = patterns[0], + rest = patterns.slice(1), + len = strings.length, + matchFound; + + if(first === '*') { + for(var i = 0; i <= len; ++i) { + // console.log("* " + i + " trying " + rest.join(":") + " with " + strings.slice(i).join(":")) + if(globber(rest, strings.slice(i))) return true; + } + return false; + } else { + matchFound = (first === strings[0]); + // console.log ("literal matching " + first + " " + strings[0] + " " + !!matched) + } + + return matchFound && ((!rest.length && !len) || globber(rest, strings.slice(1))); +}; + +var setproto = function(obj, proto){ + if (obj.__proto__) + obj.__proto__ = proto; + else + for (var key in proto) + obj[key] = proto[key]; +}; + + +var Tube = (function(){ + var globcache = {}; + var Tube = function(opts){ + opts = opts || {}; + if (opts.queue){ + var c = function(){ + var args = arguments; + // queueOrNextTick (function(){ c.send.apply(c, args) }); + nextTick (function(){ c.send.apply(c, args) }); + return c; + }; + } else { + var c = function(){ + c.send.apply(c, arguments); + return c; + }; + } + + setproto(c, Tube.proto); + c.listeners = {}; + c.globListeners = {}; + + return c; + }; + + Tube.total = {}; + Tube.proto = {}; + + /* + adds fns as listeners to a channel + + on("msg", fn, {opts}) + on("msg", [fn, fn2], {opts}) + on("msg msg2 msg3", fn, {opts}) + on({"msg": fn, "msg2": fn2}, {opts}) + */ + + Tube.proto.on = function(){ + var chan = this; + if (typeof arguments[0] === "string") { + //if (arguments.length > 1) { // on("msg", f) + var msgMap = {}; + msgMap[arguments[0]] = arguments[1]; + var opts = arguments[2] || {}; + } else { // on({"msg": f, ...}) + var msgMap = arguments[0]; + var opts = arguments[1] || {}; + } + + for (var string in msgMap){ + var msgs = string.split(" "); + var fs = msgMap[string]; + if (!Array.isArray(fs)) fs = [fs]; + + for(var i=0, f; f=fs[i]; i++){ + if (!f.uid) f.uid = Uid(); + } + + for(var i=0, msg; msg=msgs[i]; i++){ + var listeners = (msg.indexOf("*") === -1) ? + chan.listeners : + chan.globListeners; + + // todo: this probably wastes a lot of memory? + // make a copy of the listener, add to it, and replace the listener + // why not just push directly? + // send might be iterating over it... and that will fuck up the iteration + + listeners[msg] = (msg in listeners) ? + listeners[msg].concat(fs) : + fs.concat(); + } + } + + return chan; + }; + + /* + off() + off("a:b:c") + off(f) + off("a:b:c", f) + off("a:b:c d:e:f") + off([f, f2]) + off({"a": f, "b": f2}) + */ + + Tube.proto.off = function(){ var chan = this; + + var listeners, i, msgs, msg; + + // off() : delete all listeners. but replace, instead of delete + if (arguments.length === 0) { + chan.listeners = {}; + chan.globListeners = {}; + return chan; + } + + // off("a:b:c d:e:f") + // remove all matching listeners + if (arguments.length === 1 && typeof arguments[0] === "string"){ + // question... will this fuck up send if we delete in the middle of it dispatching? + msgs = arguments[0].split(" "); + + for (i=0; msg=msgs[i]; i++){ + delete chan.listeners[msg]; + delete chan.globListeners[msg]; + } + return chan; + } + + // off(f) or off([f, f2]) + // remove all matching functions + if (typeof arguments[0] === "function" || Array.isArray(arguments[0])) { + var fs = (typeof arguments[0] === "function") ? + [arguments[0]] : + arguments[0]; + // TODO + return chan; + } + + // off("a:b:c", f) or off({"a": f, "b": f2}) + if (arguments.length > 1) { // off("msg", f) + var msgMap = {}; + msgMap[arguments[0]] = arguments[1]; + } else { // off({"msg": f, ...}) + var msgMap = arguments[0]; + } + + for (var string in msgMap){ + msgs = string.split(" "); + + var fs = msgMap[string]; + if (typeof fs === "function") fs = [fs]; + + for(var i=0; msg=msgs[i]; i++){ + if (msg in chan.listeners) + listeners = chan.listeners; + else if (msg in chan.globListeners) + listeners = chan.globListeners; + else + continue; + + // gotta do this carefully in case we are still iterating through the listener in send + // build a new array and assign it to the property, instead of mutating it. + + // console.log(" length of listeners[" + msg + "]: " + listeners[msg].length) + // console.log(listeners[msg].join(",")); + // console.log(fs.join(",")); + + listeners[msg] = listeners[msg].filter( + function(f){ return fs.indexOf(f) === -1 } + ); + + // console.log(" length of listeners[" + msg + "]: " + listeners[msg].length) + + } + } + + return chan; + + }; + + /* + c = Tube() + c.on("foo", fn) + c("foo", "bar", []) + + will call fn("bar", [], "foo") + */ + + Tube.proto.send = function(msgString /*, data... */){ + // todo: don't do this? + if (!Tube.total[msgString]) Tube.total[msgString] = 0 + Tube.total[msgString]+=1; + + var listener, + listeners = this.listeners, + globListeners = this.globListeners, + //args = Array.prototype.splice.call(arguments, 1), + msgs = tokenize(msgString), + msg, f; + + if (arguments.length) { + var args = Array.prototype.splice.call(arguments, 1); + args.push(msgString); + + } else { + var args = []; + } + + for (var m=0; msg=msgs[m]; m++){ + + var fsToRun = []; + var uidKeyFnValue = {}; + var uidKeyMsgStringValue = {}; + + // note this will die on errors + // todo: implement http://dean.edwards.name/weblog/2009/03/callbacks-vs-events/ + // exact matches + if (listener = listeners[msg]) { + for (var i=0; f=listener[i]; i++){ + // fsToRun.push([f, msg]); + uidKeyFnValue[f.uid] = f; + uidKeyMsgStringValue[f.uid] = msg; + } + } + + // glob matches + var msgSplit = msg.split(":"); + + for (var pattern in globListeners){ + + if (pattern !== "*") { // * always matches + var patternSplit = globcache[pattern] || (globcache[pattern] = pattern.split(":")); + if (!globber(patternSplit, msgSplit)) continue; + } + + listener = globListeners[pattern]; + + for (var i=0; f=listener[i]; i++){ + //f.apply(window, args); // hm possibly pass the actual message to the func + // fsToRun.push([f, msg]); + uidKeyFnValue[f.uid] = f; + uidKeyMsgStringValue[f.uid] = msg; + } + } + + var fns = []; + for (var f in uidKeyFnValue) fns.push(uidKeyFnValue[f]); + + for (var i=0, f; f=fns[i]; i++) + f.apply(f, args); + + } + return this; + }; + + return Tube; +})() + |