mirror of https://github.com/zulip/zulip.git
137 lines
3.7 KiB
JavaScript
137 lines
3.7 KiB
JavaScript
/* USAGE:
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Toggle x = components.toggle({
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selected: Integer selected_index,
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values: Array<Object> [
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{ label: i18n.t(String title) }
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],
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callback: function () {
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// .. on value change.
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},
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}).get();
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*/
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exports.toggle = function (opts) {
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const component = (function render_component(opts) {
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const _component = $("<div class='tab-switcher'></div>");
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opts.values.forEach(function (value, i) {
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// create a tab with a tab-id so they don't have to be referenced
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// by text value which can be inconsistent.
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const tab = $("<div class='ind-tab' data-tab-key='" + value.key + "' data-tab-id='" + i + "' tabindex='0'>" + value.label + "</div>");
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// add proper classes for styling in CSS.
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if (i === 0) {
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// this should be default selected unless otherwise specified.
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tab.addClass("first selected");
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} else if (i === opts.values.length - 1) {
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tab.addClass("last");
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} else {
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tab.addClass("middle");
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}
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_component.append(tab);
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});
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return _component;
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}(opts));
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const meta = {
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$ind_tab: component.find(".ind-tab"),
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idx: -1,
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};
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function select_tab(idx) {
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const elem = meta.$ind_tab.eq(idx);
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if (elem.hasClass('disabled')) {
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return;
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}
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meta.$ind_tab.removeClass("selected");
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elem.addClass("selected");
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meta.idx = idx;
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if (opts.callback) {
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opts.callback(
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opts.values[idx].label,
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opts.values[idx].key
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);
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}
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if (!opts.child_wants_focus) {
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elem.focus();
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}
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}
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function maybe_go_left() {
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if (meta.idx > 0) {
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select_tab(meta.idx - 1);
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return true;
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}
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}
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function maybe_go_right() {
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if (meta.idx < opts.values.length - 1) {
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select_tab(meta.idx + 1);
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return true;
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}
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}
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(function () {
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meta.$ind_tab.click(function () {
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const idx = $(this).data("tab-id");
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select_tab(idx);
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});
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keydown_util.handle({
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elem: meta.$ind_tab,
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handlers: {
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left_arrow: maybe_go_left,
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right_arrow: maybe_go_right,
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},
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});
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// We should arguably default opts.selected to 0.
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if (typeof opts.selected === "number") {
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select_tab(opts.selected);
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}
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}());
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const prototype = {
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maybe_go_left: maybe_go_left,
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maybe_go_right: maybe_go_right,
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disable_tab: function (name) {
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const value = _.find(opts.values, function (o) {
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return o.key === name;
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});
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const idx = opts.values.indexOf(value);
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meta.$ind_tab.eq(idx).addClass('disabled');
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},
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value: function () {
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if (meta.idx >= 0) {
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return opts.values[meta.idx].label;
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}
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},
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get: function () {
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return component;
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},
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// go through the process of finding the correct tab for a given name,
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// and when found, select that one and provide the proper callback.
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goto: function (name) {
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const value = _.find(opts.values, function (o) {
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return o.label === name || o.key === name;
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});
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const idx = opts.values.indexOf(value);
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if (idx >= 0) {
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select_tab(idx);
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}
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},
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};
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return prototype;
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};
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window.components = exports;
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