mirror of https://github.com/zulip/zulip.git
472 lines
14 KiB
JavaScript
472 lines
14 KiB
JavaScript
var noop = function () {};
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var exports = {};
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exports.make_event_store = (selector) => {
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/*
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This function returns an event_store object that
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simulates the behavior of .on and .off from jQuery.
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It also has methods to retrieve handlers that have
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been set via .on (or similar methods), which can
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be useful for tests that want to test the actual
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handlers.
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*/
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var on_functions = new Dict();
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var child_on_functions = new Dict();
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function generic_event(event_name, arg) {
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if (typeof arg === 'function') {
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on_functions.set(event_name, arg);
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} else {
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var handler = on_functions.get(event_name);
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if (!handler) {
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var error = 'Cannot find ' + event_name + ' handler for ' + selector;
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throw Error(error);
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}
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handler(arg);
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}
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}
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var self = {
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generic_event: generic_event,
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get_on_handler: function (name, child_selector) {
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var funcs = self.get_on_handlers(name, child_selector);
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if (funcs.length === 0) {
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throw Error('Could not find handler for ' + name);
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}
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if (funcs.length > 1) {
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throw Error('Found too many handlers for ' + name);
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}
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return funcs[0];
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},
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get_on_handlers: function (name, child_selector) {
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if (child_selector === undefined) {
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return on_functions.get(name) || [];
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}
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var child_on = child_on_functions.get(child_selector) || {};
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if (!child_on) {
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return [];
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}
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return child_on.get(name) || [];
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},
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off: function () {
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var event_name;
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if (arguments.length === 2) {
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event_name = arguments[0];
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on_functions[event_name] = [];
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} else if (arguments.length === 3) {
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event_name = arguments[0];
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var sel = arguments[1];
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var child_on = child_on_functions.setdefault(sel, new Dict());
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child_on[event_name] = [];
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}
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},
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on: function () {
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// parameters will either be
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// (event_name, handler) or
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// (event_name, sel, handler)
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var event_name;
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var sel;
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var handler;
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// For each event_name (or event_name/sel combo), we will store an
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// array of functions that are mapped to the event (or event/selector).
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//
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// Usually funcs is an array of just one element, but not always.
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var funcs;
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if (arguments.length === 2) {
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event_name = arguments[0];
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handler = arguments[1];
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funcs = on_functions.setdefault(event_name, []);
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funcs.push(handler);
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} else if (arguments.length === 3) {
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event_name = arguments[0];
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sel = arguments[1];
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handler = arguments[2];
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assert.equal(typeof sel, 'string', 'String selectors expected here.');
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assert.equal(typeof handler, 'function', 'An handler function expected here.');
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var child_on = child_on_functions.setdefault(sel, new Dict());
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funcs = child_on.setdefault(event_name, []);
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funcs.push(handler);
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}
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},
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trigger: function (ev) {
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var ev_name = typeof ev === 'string' ? ev : ev.name;
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var funcs = on_functions.get(ev_name) || [];
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// The following assertion is temporary. It can be
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// legitimate for code to trigger multiple handlers.
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// But up until now, we haven't needed this, and if
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// you come across this assertion, it's possible that
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// you can simplify your tests by just doing your own
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// mocking of trigger(). If you really know what you
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// are doing, you can remove this limitation.
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assert(funcs.length <= 1, 'multiple functions set up');
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_.each(funcs, function (f) {
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f(ev.data);
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});
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},
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};
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return self;
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};
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exports.make_new_elem = function (selector, opts) {
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var html = 'never-been-set';
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var text = 'never-been-set';
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var value;
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var shown = false;
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var focused = false;
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var find_results = new Dict();
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var my_parent;
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var parents_result = new Dict();
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var properties = new Dict();
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var attrs = new Dict();
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var classes = new Dict();
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var event_store = exports.make_event_store(selector);
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var self = {
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add_child: function () {
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// TODO: Remove this once some in-flight PRs
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// get merged.
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assert(false, 'Use set_find_results instead.');
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},
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addClass: function (class_name) {
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classes.set(class_name, true);
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return self;
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},
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attr: function (name, val) {
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if (val === undefined) {
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return attrs.get(name);
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}
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attrs.set(name, val);
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return self;
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},
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blur: function () {
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focused = false;
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return self;
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},
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click: function (arg) {
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event_store.generic_event('click', arg);
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return self;
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},
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css: noop,
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data: noop,
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debug: function () {
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return {
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value: value,
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shown: shown,
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selector: selector,
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};
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},
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empty: noop,
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eq: function () {
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return self;
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},
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expectOne: function () {
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// silently do nothing
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return self;
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},
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fadeTo: noop,
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find: function (child_selector) {
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var child = find_results.get(child_selector);
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if (child) {
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return child;
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}
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if (opts.silent) {
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return self;
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}
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throw Error("Cannot find " + child_selector + " in " + selector);
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},
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focus: function () {
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focused = true;
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return self;
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},
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get: function (idx) {
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// We have some legacy code that does $('foo').get(0).
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assert.equal(idx, 0);
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return selector;
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},
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get_on_handler: function (name, child_selector) {
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return event_store.get_on_handler(name, child_selector);
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},
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get_on_handlers: function (name, child_selector) {
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return event_store.get_on_handlers(name, child_selector);
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},
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hasClass: function (class_name) {
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return classes.has(class_name);
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},
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height: noop,
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hide: function () {
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shown = false;
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return self;
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},
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html: function (arg) {
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if (arg !== undefined) {
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html = arg;
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return self;
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}
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return html;
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},
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is: function (arg) {
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if (arg === ':visible') {
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return shown;
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}
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if (arg === ':focus') {
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return focused;
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}
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return self;
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},
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is_focused: function () {
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// is_focused is not a jQuery thing; this is
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// for our testing
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return focused;
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},
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keydown: function (arg) {
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event_store.generic_event('keydown', arg);
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return self;
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},
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keyup: function (arg) {
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event_store.generic_event('keyup', arg);
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return self;
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},
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off: function () {
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event_store.off.apply(undefined, arguments);
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return self;
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},
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on: function () {
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event_store.on.apply(undefined, arguments);
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return self;
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},
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parent: function () {
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return my_parent;
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},
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parents: function (parents_selector) {
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var result = parents_result.get(parents_selector);
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assert(result, 'You need to call set_parents_result for ' +
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parents_selector + ' in ' + selector);
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return result;
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},
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prop: function (name, val) {
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if (val === undefined) {
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return properties.get(name);
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}
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properties.set(name, val);
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return self;
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},
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removeAttr: function (name) {
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attrs.del(name);
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return self;
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},
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removeClass: function (class_names) {
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class_names = class_names.split(' ');
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class_names.forEach(function (class_name) {
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classes.del(class_name);
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});
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return self;
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},
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remove: function () {
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return self;
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},
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removeData: noop,
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replaceWith: function () {
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return self;
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},
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select: function (arg) {
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event_store.generic_event('select', arg);
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return self;
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},
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set_find_results: function (find_selector, jquery_object) {
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find_results.set(find_selector, jquery_object);
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},
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show: function () {
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shown = true;
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return self;
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},
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set_parent: function (parent_elem) {
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my_parent = parent_elem;
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},
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set_parents_result: function (selector, result) {
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parents_result.set(selector, result);
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},
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stop: function () {
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return self;
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},
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text: function (arg) {
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if (arg !== undefined) {
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text = arg;
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return self;
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}
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return text;
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},
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trigger: function (ev) {
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event_store.trigger(ev);
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return self;
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},
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val: function () {
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if (arguments.length === 0) {
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return value || '';
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}
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value = arguments[0];
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return self;
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},
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visible: function () {
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return shown;
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},
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};
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if (selector[0] === '<') {
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self.html(selector);
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}
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self[0] = 'you-must-set-the-child-yourself';
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self.selector = selector;
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return self;
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};
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exports.make_zjquery = function (opts) {
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opts = opts || {};
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var elems = {};
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// Our fn structure helps us simulate extending jQuery.
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var fn = {};
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function add_extensions(obj) {
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_.each(fn, (v, k) => {
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obj[k] = v;
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});
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}
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function new_elem(selector) {
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var elem = exports.make_new_elem(selector, {
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silent: opts.silent,
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});
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add_extensions(elem);
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return elem;
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}
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var zjquery = function (arg, arg2) {
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if (typeof arg === "function") {
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// If somebody is passing us a function, we emulate
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// jQuery's behavior of running this function after
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// page load time. But there are no pages to load,
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// so we just call it right away.
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arg();
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return;
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}
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// If somebody is passing us an element, we return
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// the element itself if it's been created with
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// zjquery.
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// This may happen in cases like $(this).
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if (arg.selector) {
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if (elems[arg.selector]) {
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return arg;
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}
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}
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// We occasionally create stub objects that know
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// they want to be wrapped by jQuery (so they can
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// in turn return stubs). The convention is that
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// they provide a to_$ attribute.
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if (arg.to_$) {
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assert(typeof arg.to_$ === "function");
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return arg.to_$();
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}
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if (arg2 !== undefined) {
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throw Error("We only use one-argument variations of $(...) in Zulip code.");
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}
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var selector = arg;
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if (typeof selector !== "string") {
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console.info(arg);
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throw Error("zjquery does not know how to wrap this object yet");
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}
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var valid_selector =
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'<#.'.indexOf(selector[0]) >= 0 ||
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selector === 'window-stub' ||
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selector === 'document-stub' ||
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selector === 'body' ||
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selector === 'html' ||
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selector.location ||
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selector.indexOf('#') >= 0 ||
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selector.indexOf('.') >= 0 ||
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selector.indexOf('[') >= 0 && selector.indexOf(']') >= selector.indexOf('[');
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assert(valid_selector,
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'Invalid selector: ' + selector +
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' Use $.create() maybe?');
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if (elems[selector] === undefined) {
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var elem = new_elem(selector);
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elems[selector] = elem;
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}
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return elems[selector];
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};
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zjquery.create = function (name) {
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assert(!elems[name],
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'You already created an object with this name!!');
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var elem = new_elem(name);
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elems[name] = elem;
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return elems[name];
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};
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zjquery.stub_selector = function (selector, stub) {
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elems[selector] = stub;
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};
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zjquery.trim = function (s) { return s; };
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zjquery.state = function () {
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// useful for debugging
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var res = _.map(elems, function (v) {
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return v.debug();
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});
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res = _.map(res, function (v) {
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return [v.selector, v.value, v.shown];
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});
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res.sort();
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return res;
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};
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zjquery.Event = function (name, data) {
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return {
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name: name,
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data: data,
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};
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};
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zjquery.extend = function (content, container) {
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return _.extend(content, container);
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};
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zjquery.fn = fn;
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return zjquery;
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};
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module.exports = exports;
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