Create a content script and use the following piece of code:
//Create a request listener
chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
//Check if the requested method equals getSelection
if (request.method == "getSelection")
//Send back the selected text.
sendResponse({data: window.getSelection().toString()});
else
//Snub them.
sendResponse({});
});
This will start a request listener. With this you can send a request named getSelect from your browser_action to the content_script.
To send the getSelect request you can use the following piece of code in your browser_action.
function selectedTextPaste() {
//Get the current selected tab
chrome.tabs.getSelected(null, function(tab) {
//Send a request to the content script of the tab with as method getSelection
chrome.tabs.sendRequest(tab.id, {method: "getSelection"}, function(response) {
//do something with response.data
});
});
}
And thats all you have to do! Now you can do whatever you want with the data the browser_action has received.