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elmthello.html
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<!DOCTYPE HTML>
<html><head><meta charset="UTF-8"><title>Main</title><style>html,head,body { padding:0; margin:0; }
body { font-family: calibri, helvetica, arial, sans-serif; }</style><script type="text/javascript">var Elm = Elm || { Native: {} };Elm.Native.Basics = {};
Elm.Native.Basics.make = function(localRuntime) {
localRuntime.Native = localRuntime.Native || {};
localRuntime.Native.Basics = localRuntime.Native.Basics || {};
if (localRuntime.Native.Basics.values)
{
return localRuntime.Native.Basics.values;
}
var Utils = Elm.Native.Utils.make(localRuntime);
function div(a, b)
{
return (a / b) | 0;
}
function rem(a, b)
{
return a % b;
}
function mod(a, b)
{
if (b === 0)
{
throw new Error('Cannot perform mod 0. Division by zero error.');
}
var r = a % b;
var m = a === 0 ? 0 : (b > 0 ? (a >= 0 ? r : r + b) : -mod(-a, -b));
return m === b ? 0 : m;
}
function logBase(base, n)
{
return Math.log(n) / Math.log(base);
}
function negate(n)
{
return -n;
}
function abs(n)
{
return n < 0 ? -n : n;
}
function min(a, b)
{
return Utils.cmp(a, b) < 0 ? a : b;
}
function max(a, b)
{
return Utils.cmp(a, b) > 0 ? a : b;
}
function clamp(lo, hi, n)
{
return Utils.cmp(n, lo) < 0 ? lo : Utils.cmp(n, hi) > 0 ? hi : n;
}
function xor(a, b)
{
return a !== b;
}
function not(b)
{
return !b;
}
function isInfinite(n)
{
return n === Infinity || n === -Infinity;
}
function truncate(n)
{
return n | 0;
}
function degrees(d)
{
return d * Math.PI / 180;
}
function turns(t)
{
return 2 * Math.PI * t;
}
function fromPolar(point)
{
var r = point._0;
var t = point._1;
return Utils.Tuple2(r * Math.cos(t), r * Math.sin(t));
}
function toPolar(point)
{
var x = point._0;
var y = point._1;
return Utils.Tuple2(Math.sqrt(x * x + y * y), Math.atan2(y, x));
}
return localRuntime.Native.Basics.values = {
div: F2(div),
rem: F2(rem),
mod: F2(mod),
pi: Math.PI,
e: Math.E,
cos: Math.cos,
sin: Math.sin,
tan: Math.tan,
acos: Math.acos,
asin: Math.asin,
atan: Math.atan,
atan2: F2(Math.atan2),
degrees: degrees,
turns: turns,
fromPolar: fromPolar,
toPolar: toPolar,
sqrt: Math.sqrt,
logBase: F2(logBase),
negate: negate,
abs: abs,
min: F2(min),
max: F2(max),
clamp: F3(clamp),
compare: Utils.compare,
xor: F2(xor),
not: not,
truncate: truncate,
ceiling: Math.ceil,
floor: Math.floor,
round: Math.round,
toFloat: function(x) { return x; },
isNaN: isNaN,
isInfinite: isInfinite
};
};
Elm.Native.Port = {};
Elm.Native.Port.make = function(localRuntime) {
localRuntime.Native = localRuntime.Native || {};
localRuntime.Native.Port = localRuntime.Native.Port || {};
if (localRuntime.Native.Port.values)
{
return localRuntime.Native.Port.values;
}
var NS;
// INBOUND
function inbound(name, type, converter)
{
if (!localRuntime.argsTracker[name])
{
throw new Error(
'Port Error:\n' +
'No argument was given for the port named \'' + name + '\' with type:\n\n' +
' ' + type.split('\n').join('\n ') + '\n\n' +
'You need to provide an initial value!\n\n' +
'Find out more about ports here <http://elm-lang.org/learn/Ports.elm>'
);
}
var arg = localRuntime.argsTracker[name];
arg.used = true;
return jsToElm(name, type, converter, arg.value);
}
function inboundSignal(name, type, converter)
{
var initialValue = inbound(name, type, converter);
if (!NS)
{
NS = Elm.Native.Signal.make(localRuntime);
}
var signal = NS.input('inbound-port-' + name, initialValue);
function send(jsValue)
{
var elmValue = jsToElm(name, type, converter, jsValue);
setTimeout(function() {
localRuntime.notify(signal.id, elmValue);
}, 0);
}
localRuntime.ports[name] = { send: send };
return signal;
}
function jsToElm(name, type, converter, value)
{
try
{
return converter(value);
}
catch(e)
{
throw new Error(
'Port Error:\n' +
'Regarding the port named \'' + name + '\' with type:\n\n' +
' ' + type.split('\n').join('\n ') + '\n\n' +
'You just sent the value:\n\n' +
' ' + JSON.stringify(value) + '\n\n' +
'but it cannot be converted to the necessary type.\n' +
e.message
);
}
}
// OUTBOUND
function outbound(name, converter, elmValue)
{
localRuntime.ports[name] = converter(elmValue);
}
function outboundSignal(name, converter, signal)
{
var subscribers = [];
function subscribe(handler)
{
subscribers.push(handler);
}
function unsubscribe(handler)
{
subscribers.pop(subscribers.indexOf(handler));
}
function notify(elmValue)
{
var jsValue = converter(elmValue);
var len = subscribers.length;
for (var i = 0; i < len; ++i)
{
subscribers[i](jsValue);
}
}
if (!NS)
{
NS = Elm.Native.Signal.make(localRuntime);
}
NS.output('outbound-port-' + name, notify, signal);
localRuntime.ports[name] = {
subscribe: subscribe,
unsubscribe: unsubscribe
};
return signal;
}
return localRuntime.Native.Port.values = {
inbound: inbound,
outbound: outbound,
inboundSignal: inboundSignal,
outboundSignal: outboundSignal
};
};
if (!Elm.fullscreen) {
(function() {
'use strict';
var Display = {
FULLSCREEN: 0,
COMPONENT: 1,
NONE: 2
};
Elm.fullscreen = function(module, args)
{
var container = document.createElement('div');
document.body.appendChild(container);
return init(Display.FULLSCREEN, container, module, args || {});
};
Elm.embed = function(module, container, args)
{
var tag = container.tagName;
if (tag !== 'DIV')
{
throw new Error('Elm.node must be given a DIV, not a ' + tag + '.');
}
return init(Display.COMPONENT, container, module, args || {});
};
Elm.worker = function(module, args)
{
return init(Display.NONE, {}, module, args || {});
};
function init(display, container, module, args, moduleToReplace)
{
// defining state needed for an instance of the Elm RTS
var inputs = [];
/* OFFSET
* Elm's time traveling debugger lets you pause time. This means
* "now" may be shifted a bit into the past. By wrapping Date.now()
* we can manage this.
*/
var timer = {
programStart: Date.now(),
now: function()
{
return Date.now();
}
};
var updateInProgress = false;
function notify(id, v)
{
if (updateInProgress)
{
throw new Error(
'The notify function has been called synchronously!\n' +
'This can lead to frames being dropped.\n' +
'Definitely report this to <https://github.com/elm-lang/Elm/issues>\n');
}
updateInProgress = true;
var timestep = timer.now();
for (var i = inputs.length; i--; )
{
inputs[i].notify(timestep, id, v);
}
updateInProgress = false;
}
function setTimeout(func, delay)
{
return window.setTimeout(func, delay);
}
var listeners = [];
function addListener(relevantInputs, domNode, eventName, func)
{
domNode.addEventListener(eventName, func);
var listener = {
relevantInputs: relevantInputs,
domNode: domNode,
eventName: eventName,
func: func
};
listeners.push(listener);
}
var argsTracker = {};
for (var name in args)
{
argsTracker[name] = {
value: args[name],
used: false
};
}
// create the actual RTS. Any impure modules will attach themselves to this
// object. This permits many Elm programs to be embedded per document.
var elm = {
notify: notify,
setTimeout: setTimeout,
node: container,
addListener: addListener,
inputs: inputs,
timer: timer,
argsTracker: argsTracker,
ports: {},
isFullscreen: function() { return display === Display.FULLSCREEN; },
isEmbed: function() { return display === Display.COMPONENT; },
isWorker: function() { return display === Display.NONE; }
};
function swap(newModule)
{
removeListeners(listeners);
var div = document.createElement('div');
var newElm = init(display, div, newModule, args, elm);
inputs = [];
return newElm;
}
function dispose()
{
removeListeners(listeners);
inputs = [];
}
var Module = {};
try
{
Module = module.make(elm);
checkInputs(elm);
}
catch (error)
{
if (typeof container.appendChild === "function")
{
container.appendChild(errorNode(error.message));
}
else
{
console.error(error.message);
}
throw error;
}
if (display !== Display.NONE)
{
var graphicsNode = initGraphics(elm, Module);
}
var rootNode = { kids: inputs };
trimDeadNodes(rootNode);
inputs = rootNode.kids;
filterListeners(inputs, listeners);
addReceivers(elm.ports);
if (typeof moduleToReplace !== 'undefined')
{
hotSwap(moduleToReplace, elm);
// rerender scene if graphics are enabled.
if (typeof graphicsNode !== 'undefined')
{
graphicsNode.notify(0, true, 0);
}
}
return {
swap: swap,
ports: elm.ports,
dispose: dispose
};
}
function checkInputs(elm)
{
var argsTracker = elm.argsTracker;
for (var name in argsTracker)
{
if (!argsTracker[name].used)
{
throw new Error(
"Port Error:\nYou provided an argument named '" + name +
"' but there is no corresponding port!\n\n" +
"Maybe add a port '" + name + "' to your Elm module?\n" +
"Maybe remove the '" + name + "' argument from your initialization code in JS?"
);
}
}
}
function errorNode(message)
{
var code = document.createElement('code');
var lines = message.split('\n');
code.appendChild(document.createTextNode(lines[0]));
code.appendChild(document.createElement('br'));
code.appendChild(document.createElement('br'));
for (var i = 1; i < lines.length; ++i)
{
code.appendChild(document.createTextNode('\u00A0 \u00A0 ' + lines[i].replace(/ /g, '\u00A0 ')));
code.appendChild(document.createElement('br'));
}
code.appendChild(document.createElement('br'));
code.appendChild(document.createTextNode('Open the developer console for more details.'));
return code;
}
//// FILTER SIGNALS ////
// TODO: move this code into the signal module and create a function
// Signal.initializeGraph that actually instantiates everything.
function filterListeners(inputs, listeners)
{
loop:
for (var i = listeners.length; i--; )
{
var listener = listeners[i];
for (var j = inputs.length; j--; )
{
if (listener.relevantInputs.indexOf(inputs[j].id) >= 0)
{
continue loop;
}
}
listener.domNode.removeEventListener(listener.eventName, listener.func);
}
}
function removeListeners(listeners)
{
for (var i = listeners.length; i--; )
{
var listener = listeners[i];
listener.domNode.removeEventListener(listener.eventName, listener.func);
}
}
// add receivers for built-in ports if they are defined
function addReceivers(ports)
{
if ('title' in ports)
{
if (typeof ports.title === 'string')
{
document.title = ports.title;
}
else
{
ports.title.subscribe(function(v) { document.title = v; });
}
}
if ('redirect' in ports)
{
ports.redirect.subscribe(function(v) {
if (v.length > 0)
{
window.location = v;
}
});
}
}
// returns a boolean representing whether the node is alive or not.
function trimDeadNodes(node)
{
if (node.isOutput)
{
return true;
}
var liveKids = [];
for (var i = node.kids.length; i--; )
{
var kid = node.kids[i];
if (trimDeadNodes(kid))
{
liveKids.push(kid);
}
}
node.kids = liveKids;
return liveKids.length > 0;
}
//// RENDERING ////
function initGraphics(elm, Module)
{
if (!('main' in Module))
{
throw new Error("'main' is missing! What do I display?!");
}
var signalGraph = Module.main;
// make sure the signal graph is actually a signal & extract the visual model
if (!('notify' in signalGraph))
{
signalGraph = Elm.Signal.make(elm).constant(signalGraph);
}
var initialScene = signalGraph.value;
// Figure out what the render functions should be
var render;
var update;
if (initialScene.ctor === 'Element_elm_builtin')
{
var Element = Elm.Native.Graphics.Element.make(elm);
render = Element.render;
update = Element.updateAndReplace;
}
else
{
var VirtualDom = Elm.Native.VirtualDom.make(elm);
render = VirtualDom.render;
update = VirtualDom.updateAndReplace;
}
// Add the initialScene to the DOM
var container = elm.node;
var node = render(initialScene);
while (container.firstChild)
{
container.removeChild(container.firstChild);
}
container.appendChild(node);
var _requestAnimationFrame =
typeof requestAnimationFrame !== 'undefined'
? requestAnimationFrame
: function(cb) { setTimeout(cb, 1000 / 60); }
;
// domUpdate is called whenever the main Signal changes.
//
// domUpdate and drawCallback implement a small state machine in order
// to schedule only 1 draw per animation frame. This enforces that
// once draw has been called, it will not be called again until the
// next frame.
//
// drawCallback is scheduled whenever
// 1. The state transitions from PENDING_REQUEST to EXTRA_REQUEST, or
// 2. The state transitions from NO_REQUEST to PENDING_REQUEST
//
// Invariants:
// 1. In the NO_REQUEST state, there is never a scheduled drawCallback.
// 2. In the PENDING_REQUEST and EXTRA_REQUEST states, there is always exactly 1
// scheduled drawCallback.
var NO_REQUEST = 0;
var PENDING_REQUEST = 1;
var EXTRA_REQUEST = 2;
var state = NO_REQUEST;
var savedScene = initialScene;
var scheduledScene = initialScene;
function domUpdate(newScene)
{
scheduledScene = newScene;
switch (state)
{
case NO_REQUEST:
_requestAnimationFrame(drawCallback);
state = PENDING_REQUEST;
return;
case PENDING_REQUEST:
state = PENDING_REQUEST;
return;
case EXTRA_REQUEST:
state = PENDING_REQUEST;
return;
}
}
function drawCallback()
{
switch (state)
{
case NO_REQUEST:
// This state should not be possible. How can there be no
// request, yet somehow we are actively fulfilling a
// request?
throw new Error(
'Unexpected draw callback.\n' +
'Please report this to <https://github.com/elm-lang/core/issues>.'
);
case PENDING_REQUEST:
// At this point, we do not *know* that another frame is
// needed, but we make an extra request to rAF just in
// case. It's possible to drop a frame if rAF is called
// too late, so we just do it preemptively.
_requestAnimationFrame(drawCallback);
state = EXTRA_REQUEST;
// There's also stuff we definitely need to draw.
draw();
return;
case EXTRA_REQUEST:
// Turns out the extra request was not needed, so we will
// stop calling rAF. No reason to call it all the time if
// no one needs it.
state = NO_REQUEST;
return;
}
}
function draw()
{
update(elm.node.firstChild, savedScene, scheduledScene);
if (elm.Native.Window)
{
elm.Native.Window.values.resizeIfNeeded();
}
savedScene = scheduledScene;
}
var renderer = Elm.Native.Signal.make(elm).output('main', domUpdate, signalGraph);
// must check for resize after 'renderer' is created so
// that changes show up.
if (elm.Native.Window)
{
elm.Native.Window.values.resizeIfNeeded();
}
return renderer;
}
//// HOT SWAPPING ////
// Returns boolean indicating if the swap was successful.
// Requires that the two signal graphs have exactly the same
// structure.
function hotSwap(from, to)
{
function similar(nodeOld, nodeNew)
{
if (nodeOld.id !== nodeNew.id)
{
return false;
}
if (nodeOld.isOutput)
{
return nodeNew.isOutput;
}
return nodeOld.kids.length === nodeNew.kids.length;
}
function swap(nodeOld, nodeNew)
{
nodeNew.value = nodeOld.value;
return true;
}
var canSwap = depthFirstTraversals(similar, from.inputs, to.inputs);
if (canSwap)
{
depthFirstTraversals(swap, from.inputs, to.inputs);
}
from.node.parentNode.replaceChild(to.node, from.node);
return canSwap;
}
// Returns false if the node operation f ever fails.
function depthFirstTraversals(f, queueOld, queueNew)
{
if (queueOld.length !== queueNew.length)
{
return false;
}
queueOld = queueOld.slice(0);
queueNew = queueNew.slice(0);
var seen = [];
while (queueOld.length > 0 && queueNew.length > 0)
{
var nodeOld = queueOld.pop();
var nodeNew = queueNew.pop();
if (seen.indexOf(nodeOld.id) < 0)
{
if (!f(nodeOld, nodeNew))
{
return false;
}
queueOld = queueOld.concat(nodeOld.kids || []);
queueNew = queueNew.concat(nodeNew.kids || []);
seen.push(nodeOld.id);
}
}
return true;
}
}());
function F2(fun)
{
function wrapper(a) { return function(b) { return fun(a,b); }; }
wrapper.arity = 2;
wrapper.func = fun;
return wrapper;
}
function F3(fun)
{
function wrapper(a) {
return function(b) { return function(c) { return fun(a, b, c); }; };
}
wrapper.arity = 3;
wrapper.func = fun;
return wrapper;
}
function F4(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return fun(a, b, c, d); }; }; };
}
wrapper.arity = 4;
wrapper.func = fun;
return wrapper;
}
function F5(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return function(e) { return fun(a, b, c, d, e); }; }; }; };
}
wrapper.arity = 5;
wrapper.func = fun;
return wrapper;
}
function F6(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return function(e) { return function(f) {
return fun(a, b, c, d, e, f); }; }; }; }; };
}
wrapper.arity = 6;
wrapper.func = fun;
return wrapper;
}
function F7(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return function(e) { return function(f) {
return function(g) { return fun(a, b, c, d, e, f, g); }; }; }; }; }; };
}
wrapper.arity = 7;
wrapper.func = fun;
return wrapper;
}
function F8(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return function(e) { return function(f) {
return function(g) { return function(h) {
return fun(a, b, c, d, e, f, g, h); }; }; }; }; }; }; };
}
wrapper.arity = 8;
wrapper.func = fun;
return wrapper;
}
function F9(fun)
{
function wrapper(a) { return function(b) { return function(c) {
return function(d) { return function(e) { return function(f) {
return function(g) { return function(h) { return function(i) {
return fun(a, b, c, d, e, f, g, h, i); }; }; }; }; }; }; }; };
}
wrapper.arity = 9;
wrapper.func = fun;
return wrapper;
}
function A2(fun, a, b)
{
return fun.arity === 2
? fun.func(a, b)
: fun(a)(b);
}
function A3(fun, a, b, c)
{
return fun.arity === 3
? fun.func(a, b, c)
: fun(a)(b)(c);
}
function A4(fun, a, b, c, d)
{
return fun.arity === 4
? fun.func(a, b, c, d)
: fun(a)(b)(c)(d);
}
function A5(fun, a, b, c, d, e)
{
return fun.arity === 5
? fun.func(a, b, c, d, e)
: fun(a)(b)(c)(d)(e);
}
function A6(fun, a, b, c, d, e, f)
{
return fun.arity === 6
? fun.func(a, b, c, d, e, f)
: fun(a)(b)(c)(d)(e)(f);
}
function A7(fun, a, b, c, d, e, f, g)
{
return fun.arity === 7
? fun.func(a, b, c, d, e, f, g)
: fun(a)(b)(c)(d)(e)(f)(g);
}
function A8(fun, a, b, c, d, e, f, g, h)
{
return fun.arity === 8
? fun.func(a, b, c, d, e, f, g, h)
: fun(a)(b)(c)(d)(e)(f)(g)(h);
}
function A9(fun, a, b, c, d, e, f, g, h, i)
{
return fun.arity === 9
? fun.func(a, b, c, d, e, f, g, h, i)
: fun(a)(b)(c)(d)(e)(f)(g)(h)(i);
}
}
Elm.Native = Elm.Native || {};
Elm.Native.Utils = {};
Elm.Native.Utils.make = function(localRuntime) {
localRuntime.Native = localRuntime.Native || {};
localRuntime.Native.Utils = localRuntime.Native.Utils || {};
if (localRuntime.Native.Utils.values)
{
return localRuntime.Native.Utils.values;
}
// COMPARISONS
function eq(l, r)
{
var stack = [{'x': l, 'y': r}];
while (stack.length > 0)
{
var front = stack.pop();
var x = front.x;
var y = front.y;
if (x === y)
{
continue;
}
if (typeof x === 'object')
{
var c = 0;
for (var i in x)
{
++c;
if (i in y)
{
if (i !== 'ctor')
{
stack.push({ 'x': x[i], 'y': y[i] });
}
}
else
{
return false;
}
}
if ('ctor' in x)
{
stack.push({'x': x.ctor, 'y': y.ctor});
}
if (c !== Object.keys(y).length)
{
return false;
}
}
else if (typeof x === 'function')
{
throw new Error('Equality error: general function equality is ' +
'undecidable, and therefore, unsupported');
}
else
{
return false;
}
}
return true;
}
// code in Generate/JavaScript.hs depends on the particular
// integer values assigned to LT, EQ, and GT
var LT = -1, EQ = 0, GT = 1, ord = ['LT', 'EQ', 'GT'];
function compare(x, y)
{
return {
ctor: ord[cmp(x, y) + 1]
};
}
function cmp(x, y) {
var ord;
if (typeof x !== 'object')
{
return x === y ? EQ : x < y ? LT : GT;
}
else if (x.isChar)
{
var a = x.toString();
var b = y.toString();
return a === b
? EQ
: a < b
? LT
: GT;
}
else if (x.ctor === '::' || x.ctor === '[]')
{
while (true)