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var vomnibar = (function() {
var vomnibarUI = null; // the dialog instance for this window
var completers = { };
function getCompleter(name) {
if (!(name in completers))
completers[name] = new BackgroundCompleter(name);
return completers[name];
}
/*
* Activate the Vomnibox.
*/
function activate(completerName, refreshInterval, initialQueryValue) {
var completer = getCompleter(completerName);
if (!vomnibarUI)
vomnibarUI = new VomnibarUI();
completer.refresh();
vomnibarUI.setCompleter(completer);
vomnibarUI.setRefreshInterval(refreshInterval);
vomnibarUI.show();
if (initialQueryValue) {
vomnibarUI.setQuery(initialQueryValue);
vomnibarUI.update();
}
}
/** User interface for fuzzy completion */
var VomnibarUI = Class.extend({
init: function() {
this.prompt = '>';
this.refreshInterval = 0;
this.initDom();
},
setQuery: function(query) { this.input.value = query; },
setCompleter: function(completer) {
this.completer = completer;
this.reset();
},
setRefreshInterval: function(refreshInterval) { this.refreshInterval = refreshInterval; },
show: function() {
this.box.style.display = "block";
this.input.focus();
handlerStack.push({ keydown: this.onKeydown.bind(this) });
},
hide: function() {
this.box.style.display = "none";
this.completionList.style.display = "none";
this.input.blur();
handlerStack.pop();
},
reset: function() {
this.input.value = "";
this.updateTimer = null;
this.completions = [];
this.selection = 0;
this.update(true);
},
updateSelection: function() {
if (this.completions.length > 0)
this.selection = Math.min(this.selection, this.completions.length - 1);
for (var i = 0; i < this.completionList.children.length; ++i)
this.completionList.children[i].className = (i == this.selection) ? "selected" : "";
},
/*
* Returns the user's action ("up", "down", "enter", "dismiss" or null) based on their keypress.
* We support the arrow keys and other shortcuts for moving, so this method hides that complexity.
*/
actionFromKeyEvent: function(event) {
var key = getKeyChar(event);
if (isEscape(event))
return "dismiss";
else if (key == "up" ||
(event.shiftKey && event.keyCode == keyCodes.tab) ||
(event.ctrlKey && (key == "k" || key == "p")))
return "up";
else if (key == "down" ||
(event.keyCode == keyCodes.tab && !event.shiftKey) ||
(event.ctrlKey && (key == "j" || key == "n")))
return "down";
else if (event.keyCode == keyCodes.enter)
return "enter";
},
onKeydown: function(event) {
var action = this.actionFromKeyEvent(event);
if (!action) return true; // pass through
if (action == "dismiss") {
this.hide();
}
else if (action == "up") {
if (this.selection > 0)
this.selection -= 1;
this.updateSelection();
}
else if (action == "down") {
if (this.selection < this.completions.length - 1)
this.selection += 1;
this.updateSelection();
}
else if (action == "enter") {
this.update(true, function() {
// Shift+Enter will open the result in a new tab instead of the current tab.
var openInNewTab = (event.shiftKey || isPrimaryModifierKey(event));
this.completions[this.selection].performAction(openInNewTab);
this.hide();
}.proxy(this));
}
// It seems like we have to manually supress the event here and still return true.
event.stopPropagation();
event.preventDefault();
return true;
},
updateCompletions: function(callback) {
query = this.input.value.replace(/^\s*/, "").trim();
this.completer.filter(query, function(completions) {
this.completions = completions;
this.populateUiWithCompletions(completions);
if (callback) callback();
}.proxy(this));
},
populateUiWithCompletions: function(completions) {
// update completion list with the new data
this.completionList.innerHTML = completions.map(function(completion) {
return "<li>" + completion.html + "</li>";
}).join('');
this.completionList.style.display = (completions.length > 0) ? "block" : "none";
this.updateSelection();
},
update: function(updateSynchronously, callback) {
if (updateSynchronously) {
// cancel scheduled update
if (this.updateTimer !== null)
window.clearTimeout(this.updateTimer);
this.updateCompletions(callback);
} else if (this.updateTimer !== null) {
// an update is already scheduled, don't do anything
return;
} else {
// always update asynchronously for better user experience and to take some load off the CPU
// (not every keystroke will cause a dedicated update)
this.updateTimer = setTimeout(function() {
this.updateCompletions(callback);
this.updateTimer = null;
}.proxy(this), this.refreshInterval);
}
},
initDom: function() {
this.box = utils.createElementFromHtml(
'<div id="vomnibar" class="vimiumReset">' +
'<div class="searchArea">' +
'<input type="text" />' +
'</div>' +
'<ul></ul>' +
'</div>');
this.box.style.display = 'none';
document.body.appendChild(this.box);
this.input = document.querySelector("#vomnibar input");
this.input.addEventListener("input", function() { this.update(); }.bind(this));
this.completionList = document.querySelector("#vomnibar ul");
this.completionList.style.display = "none";
}
});
/*
* Sends filter and refresh requests to a Vomnibox completer on the background page.
*/
var BackgroundCompleter = Class.extend({
/* - name: The background page completer that you want to interface with. Either "omni" or "tabs". */
init: function(name) {
this.name = name;
this.filterPort = chrome.extension.connect({ name: "filterCompleter" });
},
refresh: function() { chrome.extension.sendRequest({ handler: "refreshCompleter", name: this.name }); },
filter: function(query, callback) {
var id = utils.createUniqueId();
this.filterPort.onMessage.addListener(function(msg) {
if (msg.id != id) return;
// The result objects coming from the background page will be of the form:
// { html: "", type: "", url: "" }
// type will be one of [tab, bookmark, history, domain].
var results = msg.results.map(function(result) {
var functionToCall;
if (result.type == "tab")
functionToCall = completionActions.switchToTab.curry(result.tabId);
else
functionToCall = completionActions.navigateToUrl.curry(result.url);
result.performAction = functionToCall;
return result;
});
callback(results);
});
this.filterPort.postMessage({ id: id, name: this.name, query: query });
}
});
/*
* These are the actions we can perform when the user selects a result in the Vomnibox.
*/
var completionActions = {
navigateToUrl: function(url, openInNewTab) {
// If the URL is a bookmarklet prefixed with javascript:, we shouldn't open that in a new tab.
if (url.indexOf("javascript:") == 0)
openInNewTab = false;
chrome.extension.sendRequest({
handler: openInNewTab ? "openUrlInNewTab" : "openUrlInCurrentTab",
url: url,
selected: openInNewTab
});
},
switchToTab: function(tabId) {
chrome.extension.sendRequest({ handler: "selectSpecificTab", id: tabId });
}
};
// public interface
return {
activate: function() { activate("omni", 100); },
activateWithCurrentUrl: function() { activate("omni", 100, window.location.toString()); },
activateTabSelection: function() { activate("tabs", 0); },
/* Used by our vomnibar dev harness. */
getUI: function() { return vomnibarUI; }
}
})();
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