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Adds peer communication between MessageHandlers.

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This commit is contained in:
Yury Delendik 2015-10-27 10:07:20 -05:00
parent 4b243cdd89
commit acdd49f480
3 changed files with 129 additions and 57 deletions
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81
src/core/worker.js
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@ -51,12 +51,49 @@ var WorkerTask = (function WorkerTaskClosure() {
})();
var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
setup: function wphSetup(handler) {
setup: function wphSetup(handler, port) {
handler.on('test', function wphSetupTest(data) {
// check if Uint8Array can be sent to worker
if (!(data instanceof Uint8Array)) {
handler.send('test', 'main', false);
return;
}
// making sure postMessage transfers are working
var supportTransfers = data[0] === 255;
handler.postMessageTransfers = supportTransfers;
// check if the response property is supported by xhr
var xhr = new XMLHttpRequest();
var responseExists = 'response' in xhr;
// check if the property is actually implemented
try {
var dummy = xhr.responseType;
} catch (e) {
responseExists = false;
}
if (!responseExists) {
handler.send('test', false);
return;
}
handler.send('test', {
supportTypedArray: true,
supportTransfers: supportTransfers
});
});
handler.on('GetDocRequest', function wphSetupDoc(data) {
return WorkerMessageHandler.createDocumentHandler(data, port);
});
},
createDocumentHandler: function wphCreateDocumentHandler(data, port) {
var pdfManager;
var terminated = false;
var cancelXHRs = null;
var WorkerTasks = [];
var mainHandlerName = data.docId;
var workerHandlerName = data.docId + '_worker';
var handler = new MessageHandler(workerHandlerName, mainHandlerName, port);
function ensureNotTerminated() {
if (terminated) {
throw new Error('Worker was terminated');
@ -262,35 +299,7 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
return pdfManagerCapability.promise;
}
handler.on('test', function wphSetupTest(data) {
// check if Uint8Array can be sent to worker
if (!(data instanceof Uint8Array)) {
handler.send('test', false);
return;
}
// making sure postMessage transfers are working
var supportTransfers = data[0] === 255;
handler.postMessageTransfers = supportTransfers;
// check if the response property is supported by xhr
var xhr = new XMLHttpRequest();
var responseExists = 'response' in xhr;
// check if the property is actually implemented
try {
var dummy = xhr.responseType;
} catch (e) {
responseExists = false;
}
if (!responseExists) {
handler.send('test', false);
return;
}
handler.send('test', {
supportTypedArray: true,
supportTransfers: supportTransfers
});
});
handler.on('GetDocRequest', function wphSetupDoc(data) {
var setupDoc = function(data) {
var onSuccess = function(doc) {
ensureNotTerminated();
handler.send('GetDoc', { pdfInfo: doc });
@ -366,7 +375,7 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
});
}, onFailure);
}, onFailure);
});
};
handler.on('GetPage', function wphSetupGetPage(data) {
return pdfManager.getPage(data.pageIndex).then(function(page) {
@ -548,6 +557,9 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
return Promise.all(waitOn).then(function () {});
});
setupDoc(data);
return workerHandlerName;
}
};
@ -557,6 +569,7 @@ var workerConsole = {
log: function log() {
var args = Array.prototype.slice.call(arguments);
globalScope.postMessage({
targetName: 'main',
action: 'console_log',
data: args
});
@ -565,6 +578,7 @@ var workerConsole = {
error: function error() {
var args = Array.prototype.slice.call(arguments);
globalScope.postMessage({
targetName: 'main',
action: 'console_error',
data: args
});
@ -594,11 +608,12 @@ if (typeof window === 'undefined') {
// Listen for unsupported features so we can pass them on to the main thread.
PDFJS.UnsupportedManager.listen(function (msg) {
globalScope.postMessage({
targetName: 'main',
action: '_unsupported_feature',
data: msg
});
});
var handler = new MessageHandler('worker_processor', this);
WorkerMessageHandler.setup(handler);
var handler = new MessageHandler('worker', 'main', this);
WorkerMessageHandler.setup(handler, this);
}