TLDR: Added a new method for plugins to use to send plugin results to JS.
I've done some work to try and optimize the exec() bridge on iOS:
https://issues.apache.org/jira/browse/CB-1579
The main goal of the change: whenever stringByEvaluatingJavascriptString is
used to call a JS callback, poll for exec() messages using the return value.
The two ways plugins sent results in before my change:
Before my change, plugins would send results using either:
[self success:pluginResult callbackId:callbackId]
or (more commonly)
[self writeJavascript:[pluginResult toSuccessCallback:callbackId]]
Both of these returned a string, which means I had to create a new method
that could take advantage of the optimization.
So, the new fancy:
[self.commandDelegate sendPluginResult:pluginResult callbackId:callbackId];
And for custom JS callbacks:
[self.commandDelegate evalJs:js]; // has a void return value.
sendPluginResult: and evalJs:js have the extra bonus that they are
thread-safe and they work around cases where an alert() in the JS callback
would result in dead-lock.
I've left both of the old signatures so as to not break third-party
plugins, but did go and update all of the core plugins. I'd like to
deprecate them. I'll go ahead and do that tomorrow probably.
I plan on updating the plugin guide to use this new method.
