Mark Finkle wrote, On 02.10.2014 22:02:
>
> I finally got around to working on ways for the Java embedding/host
> application to inject JavaScript into the GeckoView context [1].
> Coupled with injecting scripts is a mechanism to communicate between
> the JavaScript in GeckoView and the Java in the host application.
Dang!
For the SWT embedding and a customer of mine, Neil Rashbrook was working
on the exact same thing. Neil, can you please attach and describe your
patch and compare the approaches?
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>
> I have a working prototype that looks like this:
>
> class GeckoView {
> ...
> importScript(String url);
> }
>
> interface GeckoViewChrome {
> ...
> onScriptMessage(GeckoView view, JSONObject data,
> GeckoView.MessageResult result);
> }
>
> The importScript method takes a resource://android/assets/ URL to a
> JavaScript file bundled with the host application. Only scripts in the
> bundled assets folder will be imported. The scripts are imported in
> almost exactly the same way restartless add-on bootstrap.js files are
> loaded in Firefox. If the script has a global "load" function, it is
> called after the import happens. The "load" function is passed a
> "params" object which has some properties, one of which is "window" -
> the main Gecko window used to host the browsers.
>
> So a script might look like this:
>
> function load(params) {
> console.log("Got loaded!");
>
> params.window.BrowserApp.deck.addEventListener("load", function(event) {
> console.log("Loaded a web page in a tab!");
> }, true);
> }
>
> The scripts can send messages and data back to the Java host
> application using a simple GeckoView (name and features subject to
> change) helper:
>
> function load(params) {
> function callback(response) { ... };
> GeckoView.sendRequest({ json data }, callback);
> }
>
> The request is sent to the host and handled via the onScriptMessage
> method. If the optional callback is used in the request, you can
> signal success (and send back a response) or failure using the
> MessageResult object.
>
> Thoughts?
>
> Finkle
>
> [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1035420
>
>
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