sdk files reorganization to make dart2js a proper package

sdk/lib/_internal/compiler/js_lib/preambles/d8.js

-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// Javascript preamble, that lets the output of dart2js run on V8's d8 shell.
-
-// Node wraps files and provides them with a different `this`. The global
-// `this` can be accessed through `global`.
-
-var self = this;
-if (typeof global != "undefined") self = global;  // Node.js.
-
-(function(self) {
-  // Using strict mode to avoid accidentally defining global variables.
-  "use strict"; // Should be first statement of this function.
-
-  // Location (Uri.base)
-
-  var workingDirectory;
-  // TODO(sgjesse): This does not work on Windows.
-  if (typeof os == "object" && "system" in os) {
-    // V8.
-    workingDirectory = os.system("pwd");
-    var length = workingDirectory.length;
-    if (workingDirectory[length - 1] == '\n') {
-      workingDirectory = workingDirectory.substring(0, length - 1);
-    }
-  } else if (typeof process != "undefined" &&
-             typeof process.cwd == "function") {
-    // Node.js.
-    workingDirectory = process.cwd();
-  }
-  self.location = { href: "file://" + workingDirectory + "/" };
-
-  // Event loop.
-
-  // Task queue as cyclic list queue.
-  var taskQueue = new Array(8);  // Length is power of 2.
-  var head = 0;
-  var tail = 0;
-  var mask = taskQueue.length - 1;
-  function addTask(elem) {
-    taskQueue[head] = elem;
-    head = (head + 1) & mask;
-    if (head == tail) _growTaskQueue();
-  }
-  function removeTask() {
-    if (head == tail) return;
-    var result = taskQueue[tail];
-    taskQueue[tail] = undefined;
-    tail = (tail + 1) & mask;
-    return result;
-  }
-  function _growTaskQueue() {
-    // head == tail.
-    var length = taskQueue.length;
-    var split = head;
-    taskQueue.length = length * 2;
-    if (split * 2 < length) {  // split < length / 2
-      for (var i = 0; i < split; i++) {
-        taskQueue[length + i] = taskQueue[i];
-        taskQueue[i] = undefined;
-      }
-      head += length;
-    } else {
-      for (var i = split; i < length; i++) {
-        taskQueue[length + i] = taskQueue[i];
-        taskQueue[i] = undefined;
-      }
-      tail += length;
-    }
-    mask = taskQueue.length - 1;
-  }
-
-  // Mapping from timer id to timer function.
-  // The timer id is written on the function as .$timerId.
-  // That field is cleared when the timer is cancelled, but it is not returned
-  // from the queue until its time comes.
-  var timerIds = {};
-  var timerIdCounter = 1;  // Counter used to assing ids.
-
-  // Zero-timer queue as simple array queue using push/shift.
-  var zeroTimerQueue = [];
-
-  function addTimer(f, ms) {
-    var id = timerIdCounter++;
-    f.$timerId = id;
-    timerIds[id] = f;
-    if (ms == 0) {
-      zeroTimerQueue.push(f);
-    } else {
-      addDelayedTimer(f, ms);
-    }
-    return id;
-  }
-
-  function nextZeroTimer() {
-    while (zeroTimerQueue.length > 0) {
-      var action = zeroTimerQueue.shift();
-      if (action.$timerId !== undefined) return action;
-    }
-  }
-
-  function nextEvent() {
-    var action = removeTask();
-    if (action) {
-      return action;
-    }
-    do {
-      action = nextZeroTimer();
-      if (action) break;
-      var nextList = nextDelayedTimerQueue();
-      if (!nextList) {
-        return;
-      }
-      var newTime = nextList.shift();
-      advanceTimeTo(newTime);
-      zeroTimerQueue = nextList;
-    } while (true)
-    var id = action.$timerId;
-    clearTimerId(action, id);
-    return action;
-  }
-
-  // Mocking time.
-  var timeOffset = 0;
-  var now = function() {
-    // Install the mock Date object only once.
-    // Following calls to "now" will just use the new (mocked) Date.now
-    // method directly.
-    installMockDate();
-    now = Date.now;
-    return Date.now();
-  };
-  var originalDate = Date;
-  var originalNow = originalDate.now;
-  function advanceTimeTo(time) {
-    timeOffset = time - originalNow();
-  }
-  function installMockDate() {
-    var NewDate = function Date(Y, M, D, h, m, s, ms) {
-      if (this instanceof Date) {
-        // Assume a construct call.
-        switch (arguments.length) {
-          case 0:  return new originalDate(originalNow() + timeOffset);
-          case 1:  return new originalDate(Y);
-          case 2:  return new originalDate(Y, M);
-          case 3:  return new originalDate(Y, M, D);
-          case 4:  return new originalDate(Y, M, D, h);
-          case 5:  return new originalDate(Y, M, D, h, m);
-          case 6:  return new originalDate(Y, M, D, h, m, s);
-          default: return new originalDate(Y, M, D, h, m, s, ms);
-        }
-      }
-      return new originalDate(originalNow() + timeOffset).toString();
-    };
-    NewDate.UTC = originalDate.UTC;
-    NewDate.parse = originalDate.parse;
-    NewDate.now = function now() { return originalNow() + timeOffset; };
-    NewDate.prototype = originalDate.prototype;
-    originalDate.prototype.constructor = NewDate;
-    Date = NewDate;
-  }
-
-  // Heap priority queue with key index.
-  // Each entry is list of [timeout, callback1 ... callbackn].
-  var timerHeap = [];
-  var timerIndex = {};
-  function addDelayedTimer(f, ms) {
-    var timeout = now() + ms;
-    var timerList = timerIndex[timeout];
-    if (timerList == null) {
-      timerList = [timeout, f];
-      timerIndex[timeout] = timerList;
-      var index = timerHeap.length;
-      timerHeap.length += 1;
-      bubbleUp(index, timeout, timerList);
-    } else {
-      timerList.push(f);
-    }
-  }
-
-  function nextDelayedTimerQueue() {
-    if (timerHeap.length == 0) return null;
-    var result = timerHeap[0];
-    var last = timerHeap.pop();
-    if (timerHeap.length > 0) {
-      bubbleDown(0, last[0], last);
-    }
-    return result;
-  }
-
-  function bubbleUp(index, key, value) {
-    while (index != 0) {
-      var parentIndex = (index - 1) >> 1;
-      var parent = timerHeap[parentIndex];
-      var parentKey = parent[0];
-      if (key > parentKey) break;
-      timerHeap[index] = parent;
-      index = parentIndex;
-    }
-    timerHeap[index] = value;
-  }
-
-  function bubbleDown(index, key, value) {
-    while (true) {
-      var leftChildIndex = index * 2 + 1;
-      if (leftChildIndex >= timerHeap.length) break;
-      var minChildIndex = leftChildIndex;
-      var minChild = timerHeap[leftChildIndex];
-      var minChildKey = minChild[0];
-      var rightChildIndex = leftChildIndex + 1;
-      if (rightChildIndex < timerHeap.length) {
-        var rightChild = timerHeap[rightChildIndex];
-        var rightKey = rightChild[0];
-        if (rightKey < minChildKey) {
-          minChildIndex = rightChildIndex;
-          minChild = rightChild;
-          minChildKey = rightKey;
-        }
-      }
-      if (minChildKey > key) break;
-      timerHeap[index] = minChild;
-      index = minChildIndex;
-    }
-    timerHeap[index] = value;
-  }
-
-  function addInterval(f, ms) {
-    var id = timerIdCounter++;
-    function repeat() {
-      // Reactivate with the same id.
-      repeat.$timerId = id;
-      timerIds[id] = repeat;
-      addDelayedTimer(repeat, ms);
-      f();
-    }
-    repeat.$timerId = id;
-    timerIds[id] = repeat;
-    addDelayedTimer(repeat, ms);
-    return id;
-  }
-
-  function cancelTimer(id) {
-    var f = timerIds[id];
-    if (f == null) return;
-    clearTimerId(f, id);
-  }
-
-  function clearTimerId(f, id) {
-    f.$timerId = undefined;
-    delete timerIds[id];
-  }
-
-  function eventLoop(action) {
-    while (action) {
-      try {
-        action();
-      } catch (e) {
-        if (typeof onerror == "function") {
-          onerror(e, null, -1);
-        } else {
-          throw e;
-        }
-      }
-      action = nextEvent();
-    }
-  }
-
-  // Global properties. "self" refers to the global object, so adding a
-  // property to "self" defines a global variable.
-  self.self = self
-  self.dartMainRunner = function(main, args) {
-    // Initialize.
-    var action = function() { main(args); }
-    eventLoop(action);
-  };
-  self.setTimeout = addTimer;
-  self.clearTimeout = cancelTimer;
-  self.setInterval = addInterval;
-  self.clearInterval = cancelTimer;
-  self.scheduleImmediate = addTask;
-
-  function computeCurrentScript() {
-    try {
-      throw new Error();
-    } catch(e) {
-      var stack = e.stack;
-      // The V8 stack looks like:
-      //    at computeCurrentScript (preambles/d8.js:286:13)
-      //    at Object.currentScript (preambles/d8.js:308:31)
-      //    at init.currentScript (/tmp/foo.js:308:19)
-      //    at /tmp/foo.js:320:7
-      //    at /tmp/foo.js:331:4
-      var re = new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$", "mg");
-      var lastMatch = null;
-      do {
-        var match = re.exec(stack);
-        if (match != null) lastMatch = match;
-      } while (match != null);
-      return lastMatch[1];
-    }
-  }
-
-  // Adding a 'document' is dangerous since it invalidates the 'typeof document'
-  // test to see if we are running in the browser. It means that the runtime
-  // needs to do more precise checks.
-  // Note that we can't run "currentScript" right away, since that would give
-  // us the location of the preamble file. Instead we wait for the first access
-  // which should happen just before invoking main. At this point we are in
-  // the main file and setting the currentScript property is correct.
-  var cachedCurrentScript = null;
-  self.document = { get currentScript() {
-      if (cachedCurrentScript == null) {
-        cachedCurrentScript = {src: computeCurrentScript()};
-      }
-      return cachedCurrentScript;
-    }
-  };
-
-  // Support for deferred loading.
-  self.dartDeferredLibraryLoader = function(uri, successCallback, errorCallback) {
-    try {
-      load(uri);
-      successCallback();
-    } catch (error) {
-      errorCallback(error);
-    }
-  };
-})(self);