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Last active November 9, 2016 12:02
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pull stream drag mouse test
const pull = require('pull-stream')
const log = require('pull-stream/sinks/log')
const filter = require('pull-stream/throughs/filter')
const take = require('pull-stream/throughs/take')
const containsPoint = require('pex-geom/Rect').containsPoint
const pushableStream = require('pull-pushable')
// Draw a red canvas with yellow "button" on the left
const btnRect = [[10, 10], [100, 100]]
const smallBtnRect = [[20, 20], [50, 50]]
function inRect (rect) {
return function (e) {
// TODO: curry this!
return containsPoint(rect, [e.clientX, e.clientY])
}
}
const canvas = document.createElement('canvas')
canvas.style.background = 'red'
document.body.appendChild(canvas)
const ctx = canvas.getContext('2d')
ctx.fillStyle = '#FFFF00'
ctx.fillRect(btnRect[0][0], btnRect[0][1], btnRect[1][0] - btnRect[0][0], btnRect[1][1] - btnRect[0][1])
ctx.fillStyle = '#00FF00'
ctx.fillRect(smallBtnRect[0][0], smallBtnRect[0][1], smallBtnRect[1][0] - smallBtnRect[0][0], smallBtnRect[1][1] - smallBtnRect[0][1])
function createEventStream(element, event) {
const events = pushableStream()
element.addEventListener(event, (e) => {
events.push(e)
})
return events
}
//read source and log it.
function logger (msg) {
return function (read) {
read(null, function next(end, data) {
if(end === true) return
if(end) throw end
console.log(msg, data)
read(null, next)
})
}
}
var mousedown = createEventStream(canvas, 'mousedown')
var mousemove = createEventStream(canvas, 'mousemove')
var mouseup = createEventStream(canvas, 'mouseup')
function makeDragStream(mousedown) {
const events = pushableStream()
pull(mousedown, pull.take(() => {}), pull.drain((e) => {
events.push(e)
}))
return events
}
//pull(mousedown, filter(inRect(btnRect)), logger('stream down'))
setTimeout(function(){
;require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
'use strict'
module.exports = function pull (a) {
var length = arguments.length
if (typeof a === 'function' && a.length === 1) {
var args = new Array(length)
for(var i = 0; i < length; i++)
args[i] = arguments[i]
return function (read) {
if (args == null) {
throw new TypeError("partial sink should only be called once!")
}
// Grab the reference after the check, because it's always an array now
// (engines like that kind of consistency).
var ref = args
args = null
// Prioritize common case of small number of pulls.
switch (length) {
case 1: return pull(read, ref[0])
case 2: return pull(read, ref[0], ref[1])
case 3: return pull(read, ref[0], ref[1], ref[2])
case 4: return pull(read, ref[0], ref[1], ref[2], ref[3])
default:
ref.unshift(read)
return pull.apply(null, ref)
}
}
}
var read = a
if (read && typeof read.source === 'function') {
read = read.source
}
for (var i = 1; i < length; i++) {
var s = arguments[i]
if (typeof s === 'function') {
read = s(read)
} else if (s && typeof s === 'object') {
s.sink(read)
read = s.source
}
}
return read
}
},{}],2:[function(require,module,exports){
'use strict'
var reduce = require('./reduce')
module.exports = function collect (cb) {
return reduce(function (arr, item) {
arr.push(item)
return arr
}, [], cb)
}
},{"./reduce":9}],3:[function(require,module,exports){
'use strict'
var reduce = require('./reduce')
module.exports = function concat (cb) {
return reduce(function (a, b) {
return a + b
}, '', cb)
}
},{"./reduce":9}],4:[function(require,module,exports){
'use strict'
module.exports = function drain (op, done) {
var read, abort
function sink (_read) {
read = _read
if(abort) return sink.abort()
//this function is much simpler to write if you
//just use recursion, but by using a while loop
//we do not blow the stack if the stream happens to be sync.
;(function next() {
var loop = true, cbed = false
while(loop) {
cbed = false
read(null, function (end, data) {
cbed = true
if(end = end || abort) {
loop = false
if(done) done(end === true ? null : end)
else if(end && end !== true)
throw end
}
else if(op && false === op(data) || abort) {
loop = false
read(abort || true, done || function () {})
}
else if(!loop){
next()
}
})
if(!cbed) {
loop = false
return
}
}
})()
}
sink.abort = function (err, cb) {
if('function' == typeof err)
cb = err, err = true
abort = err || true
if(read) return read(abort, cb || function () {})
}
return sink
}
},{}],5:[function(require,module,exports){
'use strict'
function id (e) { return e }
var prop = require('../util/prop')
var drain = require('./drain')
module.exports = function find (test, cb) {
var ended = false
if(!cb)
cb = test, test = id
else
test = prop(test) || id
return drain(function (data) {
if(test(data)) {
ended = true
cb(null, data)
return false
}
}, function (err) {
if(ended) return //already called back
cb(err === true ? null : err, null)
})
}
},{"../util/prop":29,"./drain":4}],6:[function(require,module,exports){
'use strict'
module.exports = {
drain: require('./drain'),
onEnd: require('./on-end'),
log: require('./log'),
find: require('./find'),
reduce: require('./reduce'),
collect: require('./collect'),
concat: require('./concat')
}
},{"./collect":2,"./concat":3,"./drain":4,"./find":5,"./log":7,"./on-end":8,"./reduce":9}],7:[function(require,module,exports){
'use strict'
var drain = require('./drain')
module.exports = function log (done) {
return drain(function (data) {
console.log(data)
}, done)
}
},{"./drain":4}],8:[function(require,module,exports){
'use strict'
var drain = require('./drain')
module.exports = function onEnd (done) {
return drain(null, done)
}
},{"./drain":4}],9:[function(require,module,exports){
'use strict'
var drain = require('./drain')
module.exports = function reduce (reducer, acc, cb ) {
if(!cb) cb = acc, acc = null
var sink = drain(function (data) {
acc = reducer(acc, data)
}, function (err) {
cb(err, acc)
})
if (arguments.length === 2)
return function (source) {
source(null, function (end, data) {
//if ended immediately, and no initial...
if(end) return cb(end === true ? null : end)
acc = data; sink(source)
})
}
else
return sink
}
},{"./drain":4}],10:[function(require,module,exports){
'use strict'
module.exports = function count (max) {
var i = 0; max = max || Infinity
return function (end, cb) {
if(end) return cb && cb(end)
if(i > max)
return cb(true)
cb(null, i++)
}
}
},{}],11:[function(require,module,exports){
'use strict'
//a stream that ends immediately.
module.exports = function empty () {
return function (abort, cb) {
cb(true)
}
}
},{}],12:[function(require,module,exports){
'use strict'
//a stream that errors immediately.
module.exports = function error (err) {
return function (abort, cb) {
cb(err)
}
}
},{}],13:[function(require,module,exports){
'use strict'
module.exports = {
keys: require('./keys'),
once: require('./once'),
values: require('./values'),
count: require('./count'),
infinite: require('./infinite'),
empty: require('./empty'),
error: require('./error')
}
},{"./count":10,"./empty":11,"./error":12,"./infinite":14,"./keys":15,"./once":16,"./values":17}],14:[function(require,module,exports){
'use strict'
module.exports = function infinite (generate) {
generate = generate || Math.random
return function (end, cb) {
if(end) return cb && cb(end)
return cb(null, generate())
}
}
},{}],15:[function(require,module,exports){
'use strict'
var values = require('./values')
module.exports = function (object) {
return values(Object.keys(object))
}
},{"./values":17}],16:[function(require,module,exports){
'use strict'
var abortCb = require('../util/abort-cb')
module.exports = function once (value, onAbort) {
return function (abort, cb) {
if(abort)
return abortCb(cb, abort, onAbort)
if(value != null) {
var _value = value; value = null
cb(null, _value)
} else
cb(true)
}
}
},{"../util/abort-cb":28}],17:[function(require,module,exports){
'use strict'
var abortCb = require('../util/abort-cb')
module.exports = function values (array, onAbort) {
if(!array)
return function (abort, cb) {
if(abort) return abortCb(cb, abort, onAbort)
return cb(true)
}
if(!Array.isArray(array))
array = Object.keys(array).map(function (k) {
return array[k]
})
var i = 0
return function (abort, cb) {
if(abort)
return abortCb(cb, abort, onAbort)
if(i >= array.length)
cb(true)
else
cb(null, array[i++])
}
}
},{"../util/abort-cb":28}],18:[function(require,module,exports){
'use strict'
function id (e) { return e }
var prop = require('../util/prop')
module.exports = function asyncMap (map) {
if(!map) return id
map = prop(map)
var busy = false, abortCb, aborted
return function (read) {
return function next (abort, cb) {
if(aborted) return cb(aborted)
if(abort) {
aborted = abort
if(!busy) read(abort, cb)
else read(abort, function () {
//if we are still busy, wait for the mapper to complete.
if(busy) abortCb = cb
else cb(abort)
})
}
else
read(null, function (end, data) {
if(end) cb(end)
else if(aborted) cb(aborted)
else {
busy = true
map(data, function (err, data) {
busy = false
if(aborted) {
cb(aborted)
abortCb(aborted)
}
else if(err) next (err, cb)
else cb(null, data)
})
}
})
}
}
}
},{"../util/prop":29}],19:[function(require,module,exports){
'use strict'
var tester = require('../util/tester')
var filter = require('./filter')
module.exports = function filterNot (test) {
test = tester(test)
return filter(function (data) { return !test(data) })
}
},{"../util/tester":30,"./filter":20}],20:[function(require,module,exports){
'use strict'
var tester = require('../util/tester')
module.exports = function filter (test) {
//regexp
test = tester(test)
return function (read) {
return function next (end, cb) {
var sync, loop = true
while(loop) {
loop = false
sync = true
read(end, function (end, data) {
if(!end && !test(data))
return sync ? loop = true : next(end, cb)
cb(end, data)
})
sync = false
}
}
}
}
},{"../util/tester":30}],21:[function(require,module,exports){
'use strict'
var values = require('../sources/values')
var once = require('../sources/once')
//convert a stream of arrays or streams into just a stream.
module.exports = function flatten () {
return function (read) {
var _read
return function (abort, cb) {
if (abort) { //abort the current stream, and then stream of streams.
_read ? _read(abort, function(err) {
read(err || abort, cb)
}) : read(abort, cb)
}
else if(_read) nextChunk()
else nextStream()
function nextChunk () {
_read(null, function (err, data) {
if (err === true) nextStream()
else if (err) {
read(true, function(abortErr) {
// TODO: what do we do with the abortErr?
cb(err)
})
}
else cb(null, data)
})
}
function nextStream () {
_read = null
read(null, function (end, stream) {
if(end)
return cb(end)
if(Array.isArray(stream) || stream && 'object' === typeof stream)
stream = values(stream)
else if('function' != typeof stream)
stream = once(stream)
_read = stream
nextChunk()
})
}
}
}
}
},{"../sources/once":16,"../sources/values":17}],22:[function(require,module,exports){
'use strict'
module.exports = {
map: require('./map'),
asyncMap: require('./async-map'),
filter: require('./filter'),
filterNot: require('./filter-not'),
through: require('./through'),
take: require('./take'),
unique: require('./unique'),
nonUnique: require('./non-unique'),
flatten: require('./flatten')
}
},{"./async-map":18,"./filter":20,"./filter-not":19,"./flatten":21,"./map":23,"./non-unique":24,"./take":25,"./through":26,"./unique":27}],23:[function(require,module,exports){
'use strict'
function id (e) { return e }
var prop = require('../util/prop')
module.exports = function map (mapper) {
if(!mapper) return id
mapper = prop(mapper)
return function (read) {
return function (abort, cb) {
read(abort, function (end, data) {
try {
data = !end ? mapper(data) : null
} catch (err) {
return read(err, function () {
return cb(err)
})
}
cb(end, data)
})
}
}
}
},{"../util/prop":29}],24:[function(require,module,exports){
'use strict'
var unique = require('./unique')
//passes an item through when you see it for the second time.
module.exports = function nonUnique (field) {
return unique(field, true)
}
},{"./unique":27}],25:[function(require,module,exports){
'use strict'
//read a number of items and then stop.
module.exports = function take (test, opts) {
opts = opts || {}
var last = opts.last || false // whether the first item for which !test(item) should still pass
var ended = false
if('number' === typeof test) {
last = true
var n = test; test = function () {
return --n
}
}
return function (read) {
function terminate (cb) {
read(true, function (err) {
last = false; cb(err || true)
})
}
return function (end, cb) {
if(ended) last ? terminate(cb) : cb(ended)
else if(ended = end) read(ended, cb)
else
read(null, function (end, data) {
if(ended = ended || end) {
//last ? terminate(cb) :
cb(ended)
}
else if(!test(data)) {
ended = true
last ? cb(null, data) : terminate(cb)
}
else
cb(null, data)
})
}
}
}
},{}],26:[function(require,module,exports){
'use strict'
//a pass through stream that doesn't change the value.
module.exports = function through (op, onEnd) {
var a = false
function once (abort) {
if(a || !onEnd) return
a = true
onEnd(abort === true ? null : abort)
}
return function (read) {
return function (end, cb) {
if(end) once(end)
return read(end, function (end, data) {
if(!end) op && op(data)
else once(end)
cb(end, data)
})
}
}
}
},{}],27:[function(require,module,exports){
'use strict'
function id (e) { return e }
var prop = require('../util/prop')
var filter = require('./filter')
//drop items you have already seen.
module.exports = function unique (field, invert) {
field = prop(field) || id
var seen = {}
return filter(function (data) {
var key = field(data)
if(seen[key]) return !!invert //false, by default
else seen[key] = true
return !invert //true by default
})
}
},{"../util/prop":29,"./filter":20}],28:[function(require,module,exports){
module.exports = function abortCb(cb, abort, onAbort) {
cb(abort)
onAbort && onAbort(abort === true ? null: abort)
return
}
},{}],29:[function(require,module,exports){
module.exports = function prop (key) {
return key && (
'string' == typeof key
? function (data) { return data[key] }
: 'object' === typeof key && 'function' === typeof key.exec //regexp
? function (data) { var v = key.exec(data); return v && v[0] }
: key
)
}
},{}],30:[function(require,module,exports){
var prop = require('./prop')
function id (e) { return e }
module.exports = function tester (test) {
return (
'object' === typeof test && 'function' === typeof test.test //regexp
? function (data) { return test.test(data) }
: prop (test) || id
)
}
},{"./prop":29}],"pull-stream":[function(require,module,exports){
'use strict'
var sources = require('./sources')
var sinks = require('./sinks')
var throughs = require('./throughs')
exports = module.exports = require('./pull')
for(var k in sources)
exports[k] = sources[k]
for(var k in throughs)
exports[k] = throughs[k]
for(var k in sinks)
exports[k] = sinks[k]
},{"./pull":1,"./sinks":6,"./sources":13,"./throughs":22}]},{},[])
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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","'use strict'\n\nmodule.exports = function pull (a) {\n  var length = arguments.length\n  if (typeof a === 'function' && a.length === 1) {\n    var args = new Array(length)\n    for(var i = 0; i < length; i++)\n      args[i] = arguments[i]\n    return function (read) {\n      if (args == null) {\n        throw new TypeError(\"partial sink should only be called once!\")\n      }\n\n      // Grab the reference after the check, because it's always an array now\n      // (engines like that kind of consistency).\n      var ref = args\n      args = null\n\n      // Prioritize common case of small number of pulls.\n      switch (length) {\n      case 1: return pull(read, ref[0])\n      case 2: return pull(read, ref[0], ref[1])\n      case 3: return pull(read, ref[0], ref[1], ref[2])\n      case 4: return pull(read, ref[0], ref[1], ref[2], ref[3])\n      default:\n        ref.unshift(read)\n        return pull.apply(null, ref)\n      }\n    }\n  }\n\n  var read = a\n\n  if (read && typeof read.source === 'function') {\n    read = read.source\n  }\n\n  for (var i = 1; i < length; i++) {\n    var s = arguments[i]\n    if (typeof s === 'function') {\n      read = s(read)\n    } else if (s && typeof s === 'object') {\n      s.sink(read)\n      read = s.source\n    }\n  }\n\n  return read\n}\n","'use strict'\n\nvar reduce = require('./reduce')\n\nmodule.exports = function collect (cb) {\n  return reduce(function (arr, item) {\n    arr.push(item)\n    return arr\n  }, [], cb)\n}\n","'use strict'\n\nvar reduce = require('./reduce')\n\nmodule.exports = function concat (cb) {\n  return reduce(function (a, b) {\n    return a + b\n  }, '', cb)\n}\n","'use strict'\n\nmodule.exports = function drain (op, done) {\n  var read, abort\n\n  function sink (_read) {\n    read = _read\n    if(abort) return sink.abort()\n    //this function is much simpler to write if you\n    //just use recursion, but by using a while loop\n    //we do not blow the stack if the stream happens to be sync.\n    ;(function next() {\n        var loop = true, cbed = false\n        while(loop) {\n          cbed = false\n          read(null, function (end, data) {\n            cbed = true\n            if(end = end || abort) {\n              loop = false\n              if(done) done(end === true ? null : end)\n              else if(end && end !== true)\n                throw end\n            }\n            else if(op && false === op(data) || abort) {\n              loop = false\n              read(abort || true, done || function () {})\n            }\n            else if(!loop){\n              next()\n            }\n          })\n          if(!cbed) {\n            loop = false\n            return\n          }\n        }\n      })()\n  }\n\n  sink.abort = function (err, cb) {\n    if('function' == typeof err)\n      cb = err, err = true\n    abort = err || true\n    if(read) return read(abort, cb || function () {})\n  }\n\n  return sink\n}\n","'use strict'\n\nfunction id (e) { return e }\nvar prop = require('../util/prop')\nvar drain = require('./drain')\n\nmodule.exports = function find (test, cb) {\n  var ended = false\n  if(!cb)\n    cb = test, test = id\n  else\n    test = prop(test) || id\n\n  return drain(function (data) {\n    if(test(data)) {\n      ended = true\n      cb(null, data)\n    return false\n    }\n  }, function (err) {\n    if(ended) return //already called back\n    cb(err === true ? null : err, null)\n  })\n}\n\n\n\n\n","'use strict'\n\nmodule.exports = {\n  drain: require('./drain'),\n  onEnd: require('./on-end'),\n  log: require('./log'),\n  find: require('./find'),\n  reduce: require('./reduce'),\n  collect: require('./collect'),\n  concat: require('./concat')\n}\n\n","'use strict'\n\nvar drain = require('./drain')\n\nmodule.exports = function log (done) {\n  return drain(function (data) {\n    console.log(data)\n  }, done)\n}\n","'use strict'\n\nvar drain = require('./drain')\n\nmodule.exports = function onEnd (done) {\n  return drain(null, done)\n}\n","'use strict'\n\nvar drain = require('./drain')\n\nmodule.exports = function reduce (reducer, acc, cb ) {\n  if(!cb) cb = acc, acc = null\n  var sink = drain(function (data) {\n    acc = reducer(acc, data)\n  }, function (err) {\n    cb(err, acc)\n  })\n  if (arguments.length === 2)\n    return function (source) {\n      source(null, function (end, data) {\n        //if ended immediately, and no initial...\n        if(end) return cb(end === true ? null : end)\n        acc = data; sink(source)\n      })\n    }\n  else\n    return sink\n}\n","'use strict'\n\nmodule.exports = function count (max) {\n  var i = 0; max = max || Infinity\n  return function (end, cb) {\n    if(end) return cb && cb(end)\n    if(i > max)\n      return cb(true)\n    cb(null, i++)\n  }\n}\n\n\n","'use strict'\n//a stream that ends immediately.\nmodule.exports = function empty () {\n  return function (abort, cb) {\n    cb(true)\n  }\n}\n","'use strict'\n//a stream that errors immediately.\nmodule.exports = function error (err) {\n  return function (abort, cb) {\n    cb(err)\n  }\n}\n\n","'use strict'\nmodule.exports = {\n  keys: require('./keys'),\n  once: require('./once'),\n  values: require('./values'),\n  count: require('./count'),\n  infinite: require('./infinite'),\n  empty: require('./empty'),\n  error: require('./error')\n}\n","'use strict'\nmodule.exports = function infinite (generate) {\n  generate = generate || Math.random\n  return function (end, cb) {\n    if(end) return cb && cb(end)\n    return cb(null, generate())\n  }\n}\n\n\n","'use strict'\nvar values = require('./values')\nmodule.exports = function (object) {\n  return values(Object.keys(object))\n}\n\n\n","'use strict'\nvar abortCb = require('../util/abort-cb')\n\nmodule.exports = function once (value, onAbort) {\n  return function (abort, cb) {\n    if(abort)\n      return abortCb(cb, abort, onAbort)\n    if(value != null) {\n      var _value = value; value = null\n      cb(null, _value)\n    } else\n      cb(true)\n  }\n}\n\n\n","'use strict'\nvar abortCb = require('../util/abort-cb')\n\nmodule.exports = function values (array, onAbort) {\n  if(!array)\n    return function (abort, cb) {\n      if(abort) return abortCb(cb, abort, onAbort)\n      return cb(true)\n    }\n  if(!Array.isArray(array))\n    array = Object.keys(array).map(function (k) {\n      return array[k]\n    })\n  var i = 0\n  return function (abort, cb) {\n    if(abort)\n      return abortCb(cb, abort, onAbort)\n    if(i >= array.length)\n      cb(true)\n    else\n      cb(null, array[i++])\n  }\n}\n","'use strict'\n\nfunction id (e) { return e }\nvar prop = require('../util/prop')\n\nmodule.exports = function asyncMap (map) {\n  if(!map) return id\n  map = prop(map)\n  var busy = false, abortCb, aborted\n  return function (read) {\n    return function next (abort, cb) {\n      if(aborted) return cb(aborted)\n      if(abort) {\n        aborted = abort\n        if(!busy) read(abort, cb)\n        else read(abort, function () {\n          //if we are still busy, wait for the mapper to complete.\n          if(busy) abortCb = cb\n          else cb(abort)\n        })\n      }\n      else\n        read(null, function (end, data) {\n          if(end) cb(end)\n          else if(aborted) cb(aborted)\n          else {\n            busy = true\n            map(data, function (err, data) {\n              busy = false\n              if(aborted) {\n                cb(aborted)\n                abortCb(aborted)\n              }\n              else if(err) next (err, cb)\n              else cb(null, data)\n            })\n          }\n        })\n    }\n  }\n}\n\n\n","'use strict'\n\nvar tester = require('../util/tester')\nvar filter = require('./filter')\n\nmodule.exports = function filterNot (test) {\n  test = tester(test)\n  return filter(function (data) { return !test(data) })\n}\n","'use strict'\n\nvar tester = require('../util/tester')\n\nmodule.exports = function filter (test) {\n  //regexp\n  test = tester(test)\n  return function (read) {\n    return function next (end, cb) {\n      var sync, loop = true\n      while(loop) {\n        loop = false\n        sync = true\n        read(end, function (end, data) {\n          if(!end && !test(data))\n            return sync ? loop = true : next(end, cb)\n          cb(end, data)\n        })\n        sync = false\n      }\n    }\n  }\n}\n\n","'use strict'\n\nvar values = require('../sources/values')\nvar once = require('../sources/once')\n\n//convert a stream of arrays or streams into just a stream.\nmodule.exports = function flatten () {\n  return function (read) {\n    var _read\n    return function (abort, cb) {\n      if (abort) { //abort the current stream, and then stream of streams.\n        _read ? _read(abort, function(err) {\n          read(err || abort, cb)\n        }) : read(abort, cb)\n      }\n      else if(_read) nextChunk()\n      else nextStream()\n\n      function nextChunk () {\n        _read(null, function (err, data) {\n          if (err === true) nextStream()\n          else if (err) {\n            read(true, function(abortErr) {\n              // TODO: what do we do with the abortErr?\n              cb(err)\n            })\n          }\n          else cb(null, data)\n        })\n      }\n      function nextStream () {\n        _read = null\n        read(null, function (end, stream) {\n          if(end)\n            return cb(end)\n          if(Array.isArray(stream) || stream && 'object' === typeof stream)\n            stream = values(stream)\n          else if('function' != typeof stream)\n            stream = once(stream)\n          _read = stream\n          nextChunk()\n        })\n      }\n    }\n  }\n}\n\n","'use strict'\n\nmodule.exports = {\n  map: require('./map'),\n  asyncMap: require('./async-map'),\n  filter: require('./filter'),\n  filterNot: require('./filter-not'),\n  through: require('./through'),\n  take: require('./take'),\n  unique: require('./unique'),\n  nonUnique: require('./non-unique'),\n  flatten: require('./flatten')\n}\n\n\n\n","'use strict'\n\nfunction id (e) { return e }\nvar prop = require('../util/prop')\n\nmodule.exports = function map (mapper) {\n  if(!mapper) return id\n  mapper = prop(mapper)\n  return function (read) {\n    return function (abort, cb) {\n      read(abort, function (end, data) {\n        try {\n        data = !end ? mapper(data) : null\n        } catch (err) {\n          return read(err, function () {\n            return cb(err)\n          })\n        }\n        cb(end, data)\n      })\n    }\n  }\n}\n","'use strict'\n\nvar unique = require('./unique')\n\n//passes an item through when you see it for the second time.\nmodule.exports = function nonUnique (field) {\n  return unique(field, true)\n}\n","'use strict'\n\n//read a number of items and then stop.\nmodule.exports = function take (test, opts) {\n  opts = opts || {}\n  var last = opts.last || false // whether the first item for which !test(item) should still pass\n  var ended = false\n  if('number' === typeof test) {\n    last = true\n    var n = test; test = function () {\n      return --n\n    }\n  }\n\n  return function (read) {\n\n    function terminate (cb) {\n      read(true, function (err) {\n        last = false; cb(err || true)\n      })\n    }\n\n    return function (end, cb) {\n      if(ended)            last ? terminate(cb) : cb(ended)\n      else if(ended = end) read(ended, cb)\n      else\n        read(null, function (end, data) {\n          if(ended = ended || end) {\n            //last ? terminate(cb) :\n            cb(ended)\n          }\n          else if(!test(data)) {\n            ended = true\n            last ? cb(null, data) : terminate(cb)\n          }\n          else\n            cb(null, data)\n        })\n    }\n  }\n}\n","'use strict'\n\n//a pass through stream that doesn't change the value.\nmodule.exports = function through (op, onEnd) {\n  var a = false\n\n  function once (abort) {\n    if(a || !onEnd) return\n    a = true\n    onEnd(abort === true ? null : abort)\n  }\n\n  return function (read) {\n    return function (end, cb) {\n      if(end) once(end)\n      return read(end, function (end, data) {\n        if(!end) op && op(data)\n        else once(end)\n        cb(end, data)\n      })\n    }\n  }\n}\n","'use strict'\n\nfunction id (e) { return e }\nvar prop = require('../util/prop')\nvar filter = require('./filter')\n\n//drop items you have already seen.\nmodule.exports = function unique (field, invert) {\n  field = prop(field) || id\n  var seen = {}\n  return filter(function (data) {\n    var key = field(data)\n    if(seen[key]) return !!invert //false, by default\n    else seen[key] = true\n    return !invert //true by default\n  })\n}\n\n","module.exports = function abortCb(cb, abort, onAbort) {\n  cb(abort)\n  onAbort && onAbort(abort === true ? null: abort)\n  return\n}\n\n","module.exports = function prop (key) {\n  return key && (\n    'string' == typeof key\n    ? function (data) { return data[key] }\n    : 'object' === typeof key && 'function' === typeof key.exec //regexp\n    ? function (data) { var v = key.exec(data); return v && v[0] }\n    : key\n  )\n}\n","var prop = require('./prop')\n\nfunction id (e) { return e }\n\nmodule.exports = function tester (test) {\n  return (\n    'object' === typeof test && 'function' === typeof test.test //regexp\n    ? function (data) { return test.test(data) }\n    : prop (test) || id\n  )\n}\n","'use strict'\n\nvar sources  = require('./sources')\nvar sinks    = require('./sinks')\nvar throughs = require('./throughs')\n\nexports = module.exports = require('./pull')\n\nfor(var k in sources)\n  exports[k] = sources[k]\n\nfor(var k in throughs)\n  exports[k] = throughs[k]\n\nfor(var k in sinks)\n  exports[k] = sinks[k]\n\n"]}
require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"pull-pushable":[function(require,module,exports){
module.exports = pullPushable
function pullPushable (onClose) {
// create a buffer for data
// that have been pushed
// but not yet pulled.
var buffer = []
// a pushable is a source stream
// (abort, cb) => cb(end, data)
//
// when pushable is pulled,
// keep references to abort and cb
// so we can call back after
// .end(end) or .push(data)
var abort, cb
function read (_abort, _cb) {
if (_abort) {
abort = _abort
// if there is already a cb waiting, abort it.
if (cb) callback(abort)
}
cb = _cb
drain()
}
var ended
read.end = function (end) {
ended = ended || end || true
// attempt to drain
drain()
}
read.push = function (data) {
if (ended) return
// if sink already waiting,
// we can call back directly.
if (cb) {
callback(abort, data)
return
}
// otherwise push data and
// attempt to drain
buffer.push(data)
drain()
}
return read
// `drain` calls back to (if any) waiting
// sink with abort, end, or next data.
function drain () {
if (!cb) return
if (abort) callback(abort)
else if (!buffer.length && ended) callback(ended)
else if (buffer.length) callback(null, buffer.shift())
}
// `callback` calls back to waiting sink,
// and removes references to sink cb.
function callback (err, val) {
var _cb = cb
// if error and pushable passed onClose, call it
// the first time this stream ends or errors.
if (err && onClose) {
var c = onClose
onClose = null
c(err === true ? null : err)
}
cb = null
_cb(err, val)
}
}
},{}]},{},[])
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require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
'use strict'
module.exports = function drain (op, done) {
var read, abort
function sink (_read) {
read = _read
if(abort) return sink.abort()
//this function is much simpler to write if you
//just use recursion, but by using a while loop
//we do not blow the stack if the stream happens to be sync.
;(function next() {
var loop = true, cbed = false
while(loop) {
cbed = false
read(null, function (end, data) {
cbed = true
if(end = end || abort) {
loop = false
if(done) done(end === true ? null : end)
else if(end && end !== true)
throw end
}
else if(op && false === op(data) || abort) {
loop = false
read(abort || true, done || function () {})
}
else if(!loop){
next()
}
})
if(!cbed) {
loop = false
return
}
}
})()
}
sink.abort = function (err, cb) {
if('function' == typeof err)
cb = err, err = true
abort = err || true
if(read) return read(abort, cb || function () {})
}
return sink
}
},{}],"pull-stream/sinks/log":[function(require,module,exports){
'use strict'
var drain = require('./drain')
module.exports = function log (done) {
return drain(function (data) {
console.log(data)
}, done)
}
},{"./drain":1}]},{},[])
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require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
module.exports = function prop (key) {
return key && (
'string' == typeof key
? function (data) { return data[key] }
: 'object' === typeof key && 'function' === typeof key.exec //regexp
? function (data) { var v = key.exec(data); return v && v[0] }
: key
)
}
},{}],2:[function(require,module,exports){
var prop = require('./prop')
function id (e) { return e }
module.exports = function tester (test) {
return (
'object' === typeof test && 'function' === typeof test.test //regexp
? function (data) { return test.test(data) }
: prop (test) || id
)
}
},{"./prop":1}],"pull-stream/throughs/filter":[function(require,module,exports){
'use strict'
var tester = require('../util/tester')
module.exports = function filter (test) {
//regexp
test = tester(test)
return function (read) {
return function next (end, cb) {
var sync, loop = true
while(loop) {
loop = false
sync = true
read(end, function (end, data) {
if(!end && !test(data))
return sync ? loop = true : next(end, cb)
cb(end, data)
})
sync = false
}
}
}
}
},{"../util/tester":2}]},{},[])
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require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"pull-stream/throughs/take":[function(require,module,exports){
'use strict'
//read a number of items and then stop.
module.exports = function take (test, opts) {
opts = opts || {}
var last = opts.last || false // whether the first item for which !test(item) should still pass
var ended = false
if('number' === typeof test) {
last = true
var n = test; test = function () {
return --n
}
}
return function (read) {
function terminate (cb) {
read(true, function (err) {
last = false; cb(err || true)
})
}
return function (end, cb) {
if(ended) last ? terminate(cb) : cb(ended)
else if(ended = end) read(ended, cb)
else
read(null, function (end, data) {
if(ended = ended || end) {
//last ? terminate(cb) :
cb(ended)
}
else if(!test(data)) {
ended = true
last ? cb(null, data) : terminate(cb)
}
else
cb(null, data)
})
}
}
}
},{}]},{},[])
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require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"pex-geom/Rect":[function(require,module,exports){
function create(){
return [[Infinity,Infinity],[-Infinity,-Infinity]];
}
function zero(){
return [[0,0],[0,0]];
}
function copy(a){
return [a[0].slice(0),a[1].slice()];
}
function set(a,b){
a[0][0] = b[0][0];
a[0][1] = b[0][1];
a[1][0] = b[1][0];
a[1][1] = b[1][1];
return a;
}
function set4(a,x,y,w,h){
a[0][0] = x;
a[0][1] = y;
a[1][0] = x + w;
a[1][1] = y + h;
return a;
}
function scale(a,n){
a[0][0] *= n;
a[0][1] *= n;
a[1][0] *= n;
a[1][1] *= n;
return a;
}
function setMinMax(a,min,max){
a[0][0] = min[0];
a[0][1] = min[1];
a[1][0] = max[0];
a[1][1] = max[1];
return a;
}
function setMinMax4(a,minx,miny,maxx,maxy){
a[0][0] = minx;
a[0][1] = miny;
a[1][0] = maxx;
a[1][1] = maxy;
return a;
}
function getMin(a,out){
if(out === undefined){
return [a[0][0],a[0][1]];
}
out[0] = a[0][0];
out[1] = a[0][1];
return out;
}
function getMax(a,out){
if(out === undefined){
return [a[1][0],a[1][1]];
}
out[0] = a[1][0];
out[1] = a[1][1];
return out;
}
function setSize2(a,width,height){
a[1][0] = a[0][0] + width;
a[1][1] = a[0][1] + height;
return a;
}
function setSize(a,size){
a[1][0] = a[0][0] + size[0];
a[1][1] = a[0][1] + size[1];
return a;
}
function getSize(a,out){
var width = getWidth(a);
var height = getHeight(a);
if(out === undefined){
return [width,height];
}
out[0] = width;
out[1] = height;
return out;
}
function setWidth(a,width){
a[1][0] = a[0][0] + width;
return a;
}
function setHeight(a,height){
a[1][1] = a[0][1] + height;
return a;
}
function getWidth(a){
return a[1][0] - a[0][0];
}
function getHeight(a){
return a[1][1] - a[0][1];
}
function getAspectRatio(a){
return getWidth(a) / getHeight(a);
}
function setPosition(a,position){
return setPosition2(a,position[0],position[1]);
}
function setPosition2(a,x,y){
a[0][0] = x;
a[0][1] = y;
a[1][0] = x + getWidth(a);
a[1][1] = y + getHeight(a);
return a;
}
function getTR(a,out){
if(out === undefined){
return [a[1][0],a[1]];
}
out[0] = a[1][0];
out[1] = a[0][1];
return out;
}
function getBL(a,out){
if(out === undefined){
return [a[0][0],a[1][1]];
}
out[0] = a[0][0];
out[1] = a[1][1];
return out;
}
function getCenter(a,out){
var x = getWidth(a) * 0.5;
var y = getHeight(a) * 0.5;
if(out === undefined){
return [x,y];
}
out[0] = x;
out[1] = y;
return out;
}
function containsPoint(a,point){
return containsPoint2(a,point[0],point[1]);
}
function containsPoint2(a,x,y){
return x >= a[0][0] && x <= a[1][0] && y >= a[0][1] && y <= a[1][1];
}
function containsRect(a,b){
return containsPoint2(a,b[0][0],b[0][1]) && containsPoint2(a,b[1][0],b[1][1]);
}
function includePoint(a,point){
return includePoint2(a,point[0],point[1]);
}
function includePoint2(a,x,y){
var minx = a[0][0];
var miny = a[0][1];
var maxx = a[1][0];
var maxy = a[1][1];
a[0][0] = minx > x ? x : minx;
a[0][1] = miny > y ? y : miny;
a[1][0] = maxx < x ? x : maxx;
a[1][1] = maxy < y ? y : maxy;
return a;
}
function includePoints(a,points){
var minx = a[0][0];
var miny = a[0][1];
var maxx = a[1][0];
var maxy = a[1][1];
for(var i = 0, l = points.length, x, y; i < l; ++i){
x = points[i][0];
y = points[i][1];
minx = minx > x ? x : minx;
miny = miny > y ? y : miny;
maxx = maxx < x ? x : maxx;
maxy = maxy < y ? y : maxy;
}
a[0][0] = minx;
a[0][1] = miny;
a[1][0] = maxx;
a[1][1] = maxy;
return a;
}
function includePointsFlat(a,points){
var minx = a[0][0];
var miny = a[0][1];
var maxx = a[1][0];
var maxy = a[1][1];
for(var i = 0, l = points.length, x, y; i < l; i+=2){
x = points[i ];
y = points[i+1];
minx = minx > x ? x : minx;
miny = miny > y ? y : miny;
maxx = maxx < x ? x : maxx;
maxy = maxy < y ? y : maxy;
}
a[0][0] = minx;
a[0][1] = miny;
a[1][0] = maxx;
a[1][1] = maxy;
return a;
}
function includeRect(a,rect){
includePoint(a,rect[0]);
includePoint(a,rect[1]);
return a;
}
function includeRects(a,rects){
for(var i = 0, l = rects.length; i < l; ++i){
includeRect(a,rects[i]);
}
return a;
}
function mapPoint(a,point){
var minx = a[0][0];
var miny = a[0][1];
var maxx = a[1][0];
var maxy = a[1][1];
var x = point[0];
var y = point[1];
point[0] = Math.max(minx,Math.min(x,maxx)) - minx;
point[1] = Math.max(miny,Math.min(y,maxy)) - miny;
return point;
}
function clampPoint(a,point){
var minx = a[0][0];
var miny = a[0][1];
var maxx = a[1][0];
var maxy = a[1][1];
point[0] = Math.max(minx,Math.min(point[0],maxx));
point[1] = Math.max(miny,Math.min(point[1],maxy));
return point;
}
function toMax(a){
a[0][0] = a[1][0] = -Number.MAX_VALUE;
a[0][1] = a[1][1] = Number.MAX_VALUE;
}
function setEmpty(a){
a[0][0] = a[0][1] = Infinity;
a[1][0] = a[1][1] = -Infinity;
return a;
}
function isEmpty(a){
return (a[0][0] > a[1][0]) || (a[0][1] > a[1][1]);
}
function isZero(a){
return a[0][0] == 0 && a[0][1] == 0 && a[1][0] == 0 && a[1][1] == 0;
}
function setZero(a){
a[0][0] = a[0][1] = a[1][0] = a[1][1] = 0;
return a;
}
function createFromPoints(points){
return includePoints(create(),points);
}
function createFromPointsFlat(points){
return includePointsFlat(create(),points);
}
function createFromRects(rects){
return includeRects(create(),rects);
}
/**
* [Rect description]
* @type {Object}
*/
var Rect = {
/**
* [create description]
* @type {[type]}
*/
create : create,
/**
* [zero description]
* @type {[type]}
*/
zero : zero,
/**
* [copy description]
* @type {[type]}
*/
copy : copy,
/**
* [set description]
* @type {[type]}
*/
set : set,
/**
* [set4 description]
* @type {[type]}
*/
set4 : set4,
/**
* [scale description]
* @type {[type]}
*/
scale : scale,
/**
* [setMinMax description]
* @type {[type]}
*/
setMinMax : setMinMax,
/**
* [setMinMax4 description]
* @type {[type]}
*/
setMinMax4 : setMinMax4,
/**
* [getMin description]
* @type {[type]}
*/
getMin : getMin,
/**
* [getMax description]
* @type {[type]}
*/
getMax : getMax,
/**
* [setSize2 description]
* @type {[type]}
*/
setSize2 : setSize2,
/**
* [setSize description]
* @type {[type]}
*/
setSize : setSize,
/**
* [getSize description]
* @type {[type]}
*/
getSize : getSize,
/**
* [setWidth description]
* @type {[type]}
*/
setWidth : setWidth,
/**
* [getWidth description]
* @type {[type]}
*/
getWidth : getWidth,
/**
* [setHeight description]
* @type {[type]}
*/
setHeight : setHeight,
/**
* [getHeight description]
* @type {[type]}
*/
getHeight : getHeight,
/**
* [getAspectRatio description]
* @type {[type]}
*/
getAspectRatio : getAspectRatio,
/**
* [setPosition description]
* @type {[type]}
*/
setPosition : setPosition,
/**
* [setPosition2 description]
* @type {[type]}
*/
setPosition2 : setPosition2,
/**
* [getPosition description]
* @type {[type]}
*/
getPosition : getMin,
/**
* [getTL description]
* @type {[type]}
*/
getTL : getMin,
/**
* [getTR description]
* @type {[type]}
*/
getTR : getTR,
/**
* [getBL description]
* @type {[type]}
*/
getBL : getBL,
/**
* [getBR description]
* @type {[type]}
*/
getBR : getMax,
/**
* [getCenter description]
* @type {[type]}
*/
getCenter : getCenter,
/**
* [containsPoint description]
* @type {[type]}
*/
containsPoint : containsPoint,
/**
* [containsPoint2 description]
* @type {[type]}
*/
containsPoint2 : containsPoint2,
/**
* [containsRect description]
* @type {[type]}
*/
containsRect : containsRect,
/**
* [includePoint description]
* @type {[type]}
*/
includePoint : includePoint,
/**
* [includePoint2 description]
* @type {[type]}
*/
includePoint2 : includePoint2,
/**
* [includePoints description]
* @type {[type]}
*/
includePoints : includePoints,
/**
* [includePointsFlat description]
* @type {[type]}
*/
includePointsFlat : includePointsFlat,
/**
* [includeRect description]
* @type {[type]}
*/
includeRect : includeRect,
/**
* [includeRects description]
* @type {[type]}
*/
includeRects : includeRects,
/**
* [mapPoint description]
* @type {[type]}
*/
mapPoint : mapPoint,
/**
* [clampPoint description]
* @type {[type]}
*/
clampPoint : clampPoint,
/**
* [isZero description]
* @type {Boolean}
*/
isZero : isZero,
/**
* [isEmpty description]
* @type {Boolean}
*/
isEmpty : isEmpty,
/**
* [setEmpty description]
* @type {[type]}
*/
setEmpty : setEmpty,
/**
* [toMax description]
* @type {[type]}
*/
toMax : toMax,
/**
* [setZero description]
* @type {[type]}
*/
setZero : setZero,
/**
* [createFromPoints description]
* @type {[type]}
*/
createFromPoints : createFromPoints,
/**
* [createFromPointsFlat description]
* @type {[type]}
*/
createFromPointsFlat : createFromPointsFlat,
/**
* [createFromRects description]
* @type {[type]}
*/
createFromRects : createFromRects
};
module.exports = Rect;
},{}]},{},[])
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e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","function create(){\n    return [[Infinity,Infinity],[-Infinity,-Infinity]];\n}\n\nfunction zero(){\n    return [[0,0],[0,0]];\n}\n\nfunction copy(a){\n    return [a[0].slice(0),a[1].slice()];\n}\n\nfunction set(a,b){\n    a[0][0] = b[0][0];\n    a[0][1] = b[0][1];\n    a[1][0] = b[1][0];\n    a[1][1] = b[1][1];\n    return a;\n}\n\nfunction set4(a,x,y,w,h){\n    a[0][0] = x;\n    a[0][1] = y;\n    a[1][0] = x + w;\n    a[1][1] = y + h;\n    return a;\n}\n\nfunction scale(a,n){\n    a[0][0] *= n;\n    a[0][1] *= n;\n    a[1][0] *= n;\n    a[1][1] *= n;\n    return a;\n}\n\nfunction setMinMax(a,min,max){\n    a[0][0] = min[0];\n    a[0][1] = min[1];\n    a[1][0] = max[0];\n    a[1][1] = max[1];\n    return a;\n}\n\nfunction setMinMax4(a,minx,miny,maxx,maxy){\n    a[0][0] = minx;\n    a[0][1] = miny;\n    a[1][0] = maxx;\n    a[1][1] = maxy;\n    return a;\n}\n\nfunction getMin(a,out){\n    if(out === undefined){\n        return [a[0][0],a[0][1]];\n    }\n    out[0] = a[0][0];\n    out[1] = a[0][1];\n    return out;\n}\n\nfunction getMax(a,out){\n    if(out === undefined){\n        return [a[1][0],a[1][1]];\n    }\n    out[0] = a[1][0];\n    out[1] = a[1][1];\n    return out;\n}\n\nfunction setSize2(a,width,height){\n    a[1][0] = a[0][0] + width;\n    a[1][1] = a[0][1] + height;\n    return a;\n}\n\nfunction setSize(a,size){\n    a[1][0] = a[0][0] + size[0];\n    a[1][1] = a[0][1] + size[1];\n    return a;\n}\n\nfunction getSize(a,out){\n    var width  = getWidth(a);\n    var height = getHeight(a);\n    if(out === undefined){\n        return [width,height];\n    }\n    out[0] = width;\n    out[1] = height;\n    return out;\n}\n\nfunction setWidth(a,width){\n    a[1][0] = a[0][0] + width;\n    return a;\n}\n\nfunction setHeight(a,height){\n    a[1][1] = a[0][1] + height;\n    return a;\n}\n\nfunction getWidth(a){\n    return a[1][0] - a[0][0];\n}\n\nfunction getHeight(a){\n    return a[1][1] - a[0][1];\n}\n\nfunction getAspectRatio(a){\n    return getWidth(a) / getHeight(a);\n}\n\nfunction setPosition(a,position){\n    return setPosition2(a,position[0],position[1]);\n}\n\nfunction setPosition2(a,x,y){\n    a[0][0] = x;\n    a[0][1] = y;\n    a[1][0] = x + getWidth(a);\n    a[1][1] = y + getHeight(a);\n    return a;\n}\n\nfunction getTR(a,out){\n    if(out === undefined){\n        return [a[1][0],a[1]];\n    }\n    out[0] = a[1][0];\n    out[1] = a[0][1];\n    return out;\n}\n\nfunction getBL(a,out){\n    if(out === undefined){\n        return [a[0][0],a[1][1]];\n    }\n    out[0] = a[0][0];\n    out[1] = a[1][1];\n    return out;\n}\n\nfunction getCenter(a,out){\n    var x = getWidth(a) * 0.5;\n    var y = getHeight(a) * 0.5;\n    if(out === undefined){\n        return [x,y];\n    }\n    out[0] = x;\n    out[1] = y;\n    return out;\n}\n\nfunction containsPoint(a,point){\n    return containsPoint2(a,point[0],point[1]);\n}\n\nfunction containsPoint2(a,x,y){\n    return x >= a[0][0] && x <= a[1][0] && y >= a[0][1] && y <= a[1][1];\n}\n\nfunction containsRect(a,b){\n    return containsPoint2(a,b[0][0],b[0][1]) && containsPoint2(a,b[1][0],b[1][1]);\n}\n\nfunction includePoint(a,point){\n    return includePoint2(a,point[0],point[1]);\n}\n\nfunction includePoint2(a,x,y){\n    var minx = a[0][0];\n    var miny = a[0][1];\n    var maxx = a[1][0];\n    var maxy = a[1][1];\n\n    a[0][0] = minx > x ? x : minx;\n    a[0][1] = miny > y ? y : miny;\n    a[1][0] = maxx < x ? x : maxx;\n    a[1][1] = maxy < y ? y : maxy;\n\n    return a;\n}\n\nfunction includePoints(a,points){\n    var minx = a[0][0];\n    var miny = a[0][1];\n    var maxx = a[1][0];\n    var maxy = a[1][1];\n\n    for(var i = 0, l = points.length, x, y; i < l; ++i){\n        x = points[i][0];\n        y = points[i][1];\n\n        minx = minx > x ? x : minx;\n        miny = miny > y ? y : miny;\n        maxx = maxx < x ? x : maxx;\n        maxy = maxy < y ? y : maxy;\n    }\n\n    a[0][0] = minx;\n    a[0][1] = miny;\n    a[1][0] = maxx;\n    a[1][1] = maxy;\n\n    return a;\n}\n\nfunction includePointsFlat(a,points){\n    var minx = a[0][0];\n    var miny = a[0][1];\n    var maxx = a[1][0];\n    var maxy = a[1][1];\n\n    for(var i = 0, l = points.length, x, y; i < l; i+=2){\n        x = points[i  ];\n        y = points[i+1];\n\n        minx = minx > x ? x : minx;\n        miny = miny > y ? y : miny;\n        maxx = maxx < x ? x : maxx;\n        maxy = maxy < y ? y : maxy;\n    }\n\n    a[0][0] = minx;\n    a[0][1] = miny;\n    a[1][0] = maxx;\n    a[1][1] = maxy;\n\n    return a;\n}\n\nfunction includeRect(a,rect){\n    includePoint(a,rect[0]);\n    includePoint(a,rect[1]);\n    return a;\n}\n\nfunction includeRects(a,rects){\n    for(var i = 0, l = rects.length; i < l; ++i){\n        includeRect(a,rects[i]);\n    }\n    return a;\n}\n\nfunction mapPoint(a,point){\n    var minx = a[0][0];\n    var miny = a[0][1];\n    var maxx = a[1][0];\n    var maxy = a[1][1];\n    var x = point[0];\n    var y = point[1];\n\n    point[0] = Math.max(minx,Math.min(x,maxx)) - minx;\n    point[1] = Math.max(miny,Math.min(y,maxy)) - miny;\n    return point;\n}\n\nfunction clampPoint(a,point){\n\n    var minx = a[0][0];\n    var miny = a[0][1];\n    var maxx = a[1][0];\n    var maxy = a[1][1];\n\n    point[0] = Math.max(minx,Math.min(point[0],maxx));\n    point[1] = Math.max(miny,Math.min(point[1],maxy));\n    return point;\n}\n\nfunction toMax(a){\n    a[0][0] = a[1][0] = -Number.MAX_VALUE;\n    a[0][1] = a[1][1] =  Number.MAX_VALUE;\n}\n\nfunction setEmpty(a){\n    a[0][0] = a[0][1] =  Infinity;\n    a[1][0] = a[1][1] = -Infinity;\n    return a;\n}\n\nfunction isEmpty(a){\n    return (a[0][0] > a[1][0]) || (a[0][1] > a[1][1]);\n}\n\nfunction isZero(a){\n    return a[0][0] == 0 && a[0][1] == 0 && a[1][0] == 0 && a[1][1] == 0;\n}\n\nfunction setZero(a){\n    a[0][0] = a[0][1] = a[1][0] = a[1][1] = 0;\n    return a;\n}\n\nfunction createFromPoints(points){\n    return includePoints(create(),points);\n}\n\nfunction createFromPointsFlat(points){\n    return includePointsFlat(create(),points);\n}\n\nfunction createFromRects(rects){\n    return includeRects(create(),rects);\n}\n\n/**\n * [Rect description]\n * @type {Object}\n */\nvar Rect = {\n    /**\n     * [create description]\n     * @type {[type]}\n     */\n    create : create,\n    /**\n     * [zero description]\n     * @type {[type]}\n     */\n    zero   : zero,\n    /**\n     * [copy description]\n     * @type {[type]}\n     */\n    copy   : copy,\n    /**\n     * [set description]\n     * @type {[type]}\n     */\n    set  : set,\n    /**\n     * [set4 description]\n     * @type {[type]}\n     */\n    set4 : set4,\n    /**\n     * [scale description]\n     * @type {[type]}\n     */\n    scale : scale,\n    /**\n     * [setMinMax description]\n     * @type {[type]}\n     */\n    setMinMax : setMinMax,\n    /**\n     * [setMinMax4 description]\n     * @type {[type]}\n     */\n    setMinMax4 : setMinMax4,\n    /**\n     * [getMin description]\n     * @type {[type]}\n     */\n    getMin : getMin,\n    /**\n     * [getMax description]\n     * @type {[type]}\n     */\n    getMax : getMax,\n    /**\n     * [setSize2 description]\n     * @type {[type]}\n     */\n    setSize2  : setSize2,\n    /**\n     * [setSize description]\n     * @type {[type]}\n     */\n    setSize   : setSize,\n    /**\n     * [getSize description]\n     * @type {[type]}\n     */\n    getSize   : getSize,\n    /**\n     * [setWidth description]\n     * @type {[type]}\n     */\n    setWidth  : setWidth,\n    /**\n     * [getWidth description]\n     * @type {[type]}\n     */\n    getWidth  : getWidth,\n    /**\n     * [setHeight description]\n     * @type {[type]}\n     */\n    setHeight : setHeight,\n    /**\n     * [getHeight description]\n     * @type {[type]}\n     */\n    getHeight : getHeight,\n    /**\n     * [getAspectRatio description]\n     * @type {[type]}\n     */\n    getAspectRatio : getAspectRatio,\n    /**\n     * [setPosition description]\n     * @type {[type]}\n     */\n    setPosition  : setPosition,\n    /**\n     * [setPosition2 description]\n     * @type {[type]}\n     */\n    setPosition2 : setPosition2,\n    /**\n     * [getPosition description]\n     * @type {[type]}\n     */\n    getPosition  : getMin,\n    /**\n     * [getTL description]\n     * @type {[type]}\n     */\n    getTL : getMin,\n    /**\n     * [getTR description]\n     * @type {[type]}\n     */\n    getTR : getTR,\n    /**\n     * [getBL description]\n     * @type {[type]}\n     */\n    getBL : getBL,\n    /**\n     * [getBR description]\n     * @type {[type]}\n     */\n    getBR : getMax,\n    /**\n     * [getCenter description]\n     * @type {[type]}\n     */\n    getCenter : getCenter,\n    /**\n     * [containsPoint description]\n     * @type {[type]}\n     */\n    containsPoint : containsPoint,\n    /**\n     * [containsPoint2 description]\n     * @type {[type]}\n     */\n    containsPoint2 : containsPoint2,\n    /**\n     * [containsRect description]\n     * @type {[type]}\n     */\n    containsRect   : containsRect,\n    /**\n     * [includePoint description]\n     * @type {[type]}\n     */\n    includePoint      : includePoint,\n    /**\n     * [includePoint2 description]\n     * @type {[type]}\n     */\n    includePoint2     : includePoint2,\n    /**\n     * [includePoints description]\n     * @type {[type]}\n     */\n    includePoints     : includePoints,\n    /**\n     * [includePointsFlat description]\n     * @type {[type]}\n     */\n    includePointsFlat : includePointsFlat,\n    /**\n     * [includeRect description]\n     * @type {[type]}\n     */\n    includeRect   : includeRect,\n    /**\n     * [includeRects description]\n     * @type {[type]}\n     */\n    includeRects  : includeRects,\n    /**\n     * [mapPoint description]\n     * @type {[type]}\n     */\n    mapPoint   : mapPoint,\n    /**\n     * [clampPoint description]\n     * @type {[type]}\n     */\n    clampPoint : clampPoint,\n    /**\n     * [isZero description]\n     * @type {Boolean}\n     */\n    isZero   : isZero,\n    /**\n     * [isEmpty description]\n     * @type {Boolean}\n     */\n    isEmpty  : isEmpty,\n    /**\n     * [setEmpty description]\n     * @type {[type]}\n     */\n    setEmpty : setEmpty,\n    /**\n     * [toMax description]\n     * @type {[type]}\n     */\n    toMax  : toMax,\n    /**\n     * [setZero description]\n     * @type {[type]}\n     */\n    setZero : setZero,\n    /**\n     * [createFromPoints description]\n     * @type {[type]}\n     */\n    createFromPoints     : createFromPoints,\n    /**\n     * [createFromPointsFlat description]\n     * @type {[type]}\n     */\n    createFromPointsFlat : createFromPointsFlat,\n    /**\n     * [createFromRects description]\n     * @type {[type]}\n     */\n    createFromRects      : createFromRects\n};\n\nmodule.exports = Rect;\n"]}
const pull = require('pull-stream')
const log = require('pull-stream/sinks/log')
const filter = require('pull-stream/throughs/filter')
const take = require('pull-stream/throughs/take')
const containsPoint = require('pex-geom/Rect').containsPoint
const pushableStream = require('pull-pushable')
// Draw a red canvas with yellow "button" on the left
const btnRect = [[10, 10], [100, 100]]
const smallBtnRect = [[20, 20], [50, 50]]
function inRect (rect) {
return function (e) {
// TODO: curry this!
return containsPoint(rect, [e.clientX, e.clientY])
}
}
const canvas = document.createElement('canvas')
canvas.style.background = 'red'
document.body.appendChild(canvas)
const ctx = canvas.getContext('2d')
ctx.fillStyle = '#FFFF00'
ctx.fillRect(btnRect[0][0], btnRect[0][1], btnRect[1][0] - btnRect[0][0], btnRect[1][1] - btnRect[0][1])
ctx.fillStyle = '#00FF00'
ctx.fillRect(smallBtnRect[0][0], smallBtnRect[0][1], smallBtnRect[1][0] - smallBtnRect[0][0], smallBtnRect[1][1] - smallBtnRect[0][1])
function createEventStream(element, event) {
const events = pushableStream()
element.addEventListener(event, (e) => {
events.push(e)
})
return events
}
//read source and log it.
function logger (msg) {
return function (read) {
read(null, function next(end, data) {
if(end === true) return
if(end) throw end
console.log(msg, data)
read(null, next)
})
}
}
var mousedown = createEventStream(canvas, 'mousedown')
var mousemove = createEventStream(canvas, 'mousemove')
var mouseup = createEventStream(canvas, 'mouseup')
function makeDragStream(mousedown) {
const events = pushableStream()
pull(mousedown, pull.take(() => {}), pull.drain((e) => {
events.push(e)
}))
return events
}
//pull(mousedown, filter(inRect(btnRect)), logger('stream down'))
;}, 0)
{
"name": "requirebin-sketch",
"version": "1.0.0",
"dependencies": {
"pull-stream": "3.5.0",
"pull-pushable": "2.0.1",
"pex-geom": "1.0.0-beta.2"
}
}
<!-- contents of this file will be placed inside the <body> -->
<!-- contents of this file will be placed inside the <head> -->
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