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phorge-phorge/webroot/rsrc/externals/javelin
epriestley e0087a9f7a Add JX.Leader: synchronization over localStorage
Summary:
Ref T6559. Adds a "JX.Leader" primitive to replace the synchronization over Flash. This does a couple of things:

  - Offers an "onBecomeLeader" event, which we can use to open the WebSocket.
  - Offers an "onReceiveMessage" event, which we can use to dispatch notifications and handle requests to play sounds and send desktop notifications.
  - Offers a "broadcast()" method, which we can use to send desktop notification and sound requests.

Test Plan:
Added some code like this:

```
  if (!statics.leader) {
    statics.leader = true;

    JX.Leader.listen('onBecomeLeader', function() {
      JX.log("This tab is now the leader.");
    });

    JX.Leader.listen('onReceiveBroadcast', function(message, is_leader) {
      JX.log('[' + (is_leader ? 'As Leader' : 'Not Leader') + '] ' + message);
    });

    JX.Leader.start();
  }
```

Then:

  - Saw first tab open become leader reliably in Safari, Chrome, Firefox.
  - Saw new tab become leader reliably when the first tab was closed.
  - Saw broadcast() work as documented and deliver messages with correct leadership-flag and uniqueness.

Reviewers: joshuaspence, btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T6559

Differential Revision: https://secure.phabricator.com/D11235
2015-01-06 17:50:40 -08:00
..
core Add JX.Leader: synchronization over localStorage 2015-01-06 17:50:40 -08:00
docs Remove @group annotations 2014-07-10 08:12:48 +10:00
ext Various linter fixes. 2014-02-26 12:44:58 -08:00
lib Add JX.Leader: synchronization over localStorage 2015-01-06 17:50:40 -08:00
LICENSE Various linter fixes. 2014-02-26 12:44:58 -08:00
README Move all external JS into webroot/rsrc/externals 2013-04-11 10:06:05 -07:00

Javelin is a performance-oriented Javascript library originally developed at
Facebook. Learn more at <http://www.javelinjs.com/>.

GETTING STARTED

Eat a hearty breakfast. Breakfast is the most important meal of the day!


WHAT IS JAVELIN?

Javelin is a compact Javascript library built around event delegation. Its
primary design goal is performance; it is consequently well-suited to projects
where performance is very important. It is not as good for smaller scale
projects where other concerns (like features or ease of development) are more
important.


PACKAGES

Packages come in two flavors: "dev" and "min". The "dev" packages are intended
for development, and have comments and debugging code. The "min" packages have
the same code, but with comments and debugging information stripped out and
symbols crushed. They are intended for use in production -- ha ha ha!


FILES

  example/    Example code.
  LICENSE     A thrilling narrative.
  pkg/        Ready-built Javelin packages.
  README      Who knows? Could be anything.
  src/        Raw sources for Javelin.
  support/    Support scripts and libraries.