comunic/tools/svgedit/extensions/ext-xdomain-messaging.js
2016-11-19 12:08:12 +01:00

43 lines
1.4 KiB
JavaScript
Executable File

/**
* Should not be needed for same domain control (just call via child frame),
* but an API common for cross-domain and same domain use can be found
* in embedapi.js with a demo at embedapi.html
*/
/*globals svgEditor, svgCanvas*/
svgEditor.addExtension('xdomain-messaging', function() {'use strict';
try {
window.addEventListener('message', function(e) {
// We accept and post strings for the sake of IE9 support
if (typeof e.data !== 'string' || e.data.charAt() === '|') {
return;
}
var cbid, name, args, message, allowedOrigins, data = JSON.parse(e.data);
if (!data || typeof data !== 'object' || data.namespace !== 'svgCanvas') {
return;
}
// The default is not to allow any origins, including even the same domain or if run on a file:// URL
// See config-sample.js for an example of how to configure
allowedOrigins = svgEditor.curConfig.allowedOrigins;
if (allowedOrigins.indexOf('*') === -1 && allowedOrigins.indexOf(e.origin) === -1) {
return;
}
cbid = data.id;
name = data.name;
args = data.args;
message = {
namespace: 'svg-edit',
id: cbid
};
try {
message.result = svgCanvas[name].apply(svgCanvas, args);
} catch (err) {
message.error = err.message;
}
e.source.postMessage(JSON.stringify(message), '*');
}, false);
}
catch (err) {
console.log('Error with xdomain message listener: ' + err);
}
});