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(function() {
//Communication functions for
var messageId = 1;
var callbacks = {};
function send(type, message, callback) {
var id = messageId++;
window.postMessage({sender:'page', url:location.href, messageId:id, messageType:type, payload:message}, '*');
callbacks[id] = callback;
}
window.addEventListener('message', function(message) {
if (message.data.sender == 'page') {
return; //Ignore messages we sent ourselves
}
console.info('page got message: ' + JSON.stringify(message.data));
var callback = callbacks[message.data.messageId];
if (callback) {
callback(message.data.payload);
delete callbacks[message.data.messageId];
}
});
var req = new XMLHttpRequest();
req.overrideMimeType('application/json');
req.open("GET", 'package.json', false);
req.send();
var manifest = JSON.parse(req.responseText);
window.chrome = {
storage : {
local : {
get : function(query, callback) {
send('storage.get', query, callback);
},
set : function(data, callback) {
send('storage.set', data, callback);
}
}
},
extension : {
getURL : function(file) {
return document.location.protocol + '//' + document.location.host + '/' + file;
}
},
tabs : {
query : function(data, callback) {
},
update : function(tabId, options, callback) {
}
},
runtime : {
getManifest : function() {
return manifest;
}
}
};
})();
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