blob: 43a6497e336e71ca408fa64db53a3fec48e218b8 [file] [log] [blame]
// Copyright (c) 2012, 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.
var warning = [
'WARNING: This page is using a deprecated dart.js file. ',
'Please update this page as described here: ',
'http://news.dartlang.org/2013/01/big-breaking-change-dartjs-bootstrap-file-moving-to-pub.html'
].join('');
console.error(warning);
// Bootstrap support for Dart scripts on the page as this script.
if (navigator.userAgent.indexOf('(Dart)') === -1) {
// TODO:
// - Support in-browser compilation.
// - Handle inline Dart scripts.
window.addEventListener("DOMContentLoaded", function (e) {
// Fall back to compiled JS. Run through all the scripts and
// replace them if they have a type that indicate that they source
// in Dart code.
//
// <script type="application/dart" src="..."></script>
//
var scripts = document.getElementsByTagName("script");
var length = scripts.length;
for (var i = 0; i < length; ++i) {
if (scripts[i].type == "application/dart") {
// Remap foo.dart to foo.dart.js.
if (scripts[i].src && scripts[i].src != '') {
var script = document.createElement('script');
script.src = scripts[i].src + '.js';
var parent = scripts[i].parentNode;
parent.replaceChild(script, scripts[i]);
}
}
}
}, false);
}
// ---------------------------------------------------------------------------
// Experimental support for JS interoperability
// ---------------------------------------------------------------------------
function SendPortSync() {
}
function ReceivePortSync() {
this.id = ReceivePortSync.id++;
ReceivePortSync.map[this.id] = this;
}
(function() {
// Serialize the following types as follows:
// - primitives / null: unchanged
// - lists: [ 'list', internal id, list of recursively serialized elements ]
// - maps: [ 'map', internal id, map of keys and recursively serialized values ]
// - send ports: [ 'sendport', type, isolate id, port id ]
//
// Note, internal id's are for cycle detection.
function serialize(message) {
var visited = [];
function checkedSerialization(obj, serializer) {
// Implementation detail: for now use linear search.
// Another option is expando, but it may prohibit
// VM optimizations (like putting object into slow mode
// on property deletion.)
var id = visited.indexOf(obj);
if (id != -1) return [ 'ref', id ];
var id = visited.length;
visited.push(obj);
return serializer(id);
}
function doSerialize(message) {
if (message == null) {
return null; // Convert undefined to null.
} else if (typeof(message) == 'string' ||
typeof(message) == 'number' ||
typeof(message) == 'boolean') {
return message;
} else if (message instanceof Array) {
return checkedSerialization(message, function(id) {
var values = new Array(message.length);
for (var i = 0; i < message.length; i++) {
values[i] = doSerialize(message[i]);
}
return [ 'list', id, values ];
});
} else if (message instanceof LocalSendPortSync) {
return [ 'sendport', 'nativejs', message.receivePort.id ];
} else if (message instanceof DartSendPortSync) {
return [ 'sendport', 'dart', message.isolateId, message.portId ];
} else {
return checkedSerialization(message, function(id) {
var keys = Object.getOwnPropertyNames(message);
var values = new Array(keys.length);
for (var i = 0; i < keys.length; i++) {
values[i] = doSerialize(message[keys[i]]);
}
return [ 'map', id, keys, values ];
});
}
}
return doSerialize(message);
}
function deserialize(message) {
return deserializeHelper(message);
}
function deserializeHelper(message) {
if (message == null ||
typeof(message) == 'string' ||
typeof(message) == 'number' ||
typeof(message) == 'boolean') {
return message;
}
switch (message[0]) {
case 'map': return deserializeMap(message);
case 'sendport': return deserializeSendPort(message);
case 'list': return deserializeList(message);
default: throw 'unimplemented';
}
}
function deserializeMap(message) {
var result = { };
var id = message[1];
var keys = message[2];
var values = message[3];
for (var i = 0, length = keys.length; i < length; i++) {
var key = deserializeHelper(keys[i]);
var value = deserializeHelper(values[i]);
result[key] = value;
}
return result;
}
function deserializeSendPort(message) {
var tag = message[1];
switch (tag) {
case 'nativejs':
var id = message[2];
return new LocalSendPortSync(ReceivePortSync.map[id]);
case 'dart':
var isolateId = message[2];
var portId = message[3];
return new DartSendPortSync(isolateId, portId);
default:
throw 'Illegal SendPortSync type: $tag';
}
}
function deserializeList(message) {
var values = message[2];
var length = values.length;
var result = new Array(length);
for (var i = 0; i < length; i++) {
result[i] = deserializeHelper(values[i]);
}
return result;
}
window.registerPort = function(name, port) {
var stringified = JSON.stringify(serialize(port));
var attrName = 'dart-port:' + name;
document.documentElement.setAttribute(attrName, stringified);
// TODO(vsm): Phase out usage of localStorage and delete the
// below. We're leaving it in temporarily for backwards
// compatibility.
try {
window.localStorage[attrName] = stringified;
} catch (e) {
// Swallow errors (e.g., Chrome apps disallow this access).
}
};
window.lookupPort = function(name) {
var attrName = 'dart-port:' + name;
var stringified = document.documentElement.getAttribute(attrName);
// TODO(vsm): Phase out usage of localStorage. We're leaving it in
// temporarily for backwards compatibility.
if (!stringified) {
stringified = window.localStorage[attrName];
}
return deserialize(JSON.parse(stringified));
};
ReceivePortSync.id = 0;
ReceivePortSync.map = {};
ReceivePortSync.dispatchCall = function(id, message) {
// TODO(vsm): Handle and propagate exceptions.
var deserialized = deserialize(message);
var result = ReceivePortSync.map[id].callback(deserialized);
return serialize(result);
};
ReceivePortSync.prototype.receive = function(callback) {
this.callback = callback;
};
ReceivePortSync.prototype.toSendPort = function() {
return new LocalSendPortSync(this);
};
ReceivePortSync.prototype.close = function() {
delete ReceivePortSync.map[this.id];
};
if (navigator.userAgent.indexOf('(Dart)') !== -1) {
window.addEventListener('js-sync-message', function(event) {
var data = JSON.parse(getPortSyncEventData(event));
var deserialized = deserialize(data.message);
var result = ReceivePortSync.map[data.id].callback(deserialized);
// TODO(vsm): Handle and propagate exceptions.
dispatchEvent('js-result', serialize(result));
}, false);
}
function LocalSendPortSync(receivePort) {
this.receivePort = receivePort;
}
LocalSendPortSync.prototype = new SendPortSync();
LocalSendPortSync.prototype.callSync = function(message) {
// TODO(vsm): Do a direct deepcopy.
message = deserialize(serialize(message));
return this.receivePort.callback(message);
}
function DartSendPortSync(isolateId, portId) {
this.isolateId = isolateId;
this.portId = portId;
}
DartSendPortSync.prototype = new SendPortSync();
function dispatchEvent(receiver, message) {
var string = JSON.stringify(message);
var event = document.createEvent('CustomEvent');
event.initCustomEvent(receiver, false, false, string);
window.dispatchEvent(event);
}
function getPortSyncEventData(event) {
return event.detail;
}
DartSendPortSync.prototype.callSync = function(message) {
var serialized = serialize(message);
var target = 'dart-port-' + this.isolateId + '-' + this.portId;
// TODO(vsm): Make this re-entrant.
// TODO(vsm): Set this up set once, on the first call.
var source = target + '-result';
var result = null;
var listener = function (e) {
result = JSON.parse(getPortSyncEventData(e));
};
window.addEventListener(source, listener, false);
dispatchEvent(target, [source, serialized]);
window.removeEventListener(source, listener, false);
return deserialize(result);
}
})();