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<html>
<head>
<script type="text/javascript" charset="utf-8">
var tabQueue = [];
var selectionChangedHandlers = [];
var keyQueue = "";
chrome.extension.onConnect.addListener(function(port, name) {
if (port.name == "keyDown")
port.onMessage.addListener(handleKeyDown);
});
chrome.tabs.onSelectionChanged.addListener(function (tabId, selectionInfo) {
if (selectionChangedHandlers.length > 0)
{
selectionChangedHandlers.pop().call();
}
});
function registerSelectionChangedHandler(handler) {
selectionChangedHandlers.push(handler);
}
function repeatFunction(func, totalCount, currentCount) {
if (currentCount < totalCount)
{
func(function () { repeatFunction(func, totalCount, currentCount + 1); });
}
}
// Start action functions
function createTab(callback) {
chrome.tabs.create({}, function (tab) { callback(); });
}
function removeTab(callback) {
chrome.tabs.getSelected(null, function(tab) {
tabQueue.push(tab.url);
chrome.tabs.remove(tab.id);
// We can't just call the callback here because we actually need to wait
// for the selection to change to consider this action done.
registerSelectionChangedHandler(callback);
});
}
function restoreTab(callback) {
if (tabQueue.length > 0) {
chrome.tabs.create({url: tabQueue.pop()}, function (tab) { callback(); });
}
}
// End action functions
var keyToCommandRegistry = {};
keyToCommandRegistry['j'] = 'scrollDown';
keyToCommandRegistry['k'] = 'scrollUp';
keyToCommandRegistry['h'] = 'scrollLeft';
keyToCommandRegistry['l'] = 'scrollRight';
keyToCommandRegistry['gg'] = 'scrollToTop';
keyToCommandRegistry['G'] = 'scrollToBottom';
keyToCommandRegistry['r'] = 'reload';
keyToCommandRegistry['t'] = createTab;
keyToCommandRegistry['d'] = removeTab;
keyToCommandRegistry['u'] = restoreTab;
function handleKeyDown(key) {
keyQueue = keyQueue + key;
console.log("current keyQueue: [", keyQueue, "]");
checkKeyQueue();
}
function checkKeyQueue() {
var match = /([0-9]*)(.*)/.exec(keyQueue);
var count = parseInt(match[1]);
var command = match[2];
if (command.length == 0) { return; }
if (isNaN(count)) { count = 1; }
if (keyToCommandRegistry[command])
{
registryEntry = keyToCommandRegistry[command];
console.log("command found for [", keyQueue, "],", registryEntry);
if (typeof(registryEntry) == "string")
{
chrome.tabs.getSelected(null, function (tab) {
var port = chrome.tabs.connect(tab.id, {name: "executePageCommand"});
port.postMessage({command: registryEntry, count: count});
});
}
else { repeatFunction(registryEntry, count, 0); }
keyQueue = "";
}
else if (command.length > 1)
keyQueue = "";
}
</script>
</head>
<body>
howdy
</body>
</html>
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