mirror of https://github.com/zulip/zulip.git
124 lines
4.0 KiB
JavaScript
124 lines
4.0 KiB
JavaScript
const DropdownListWidget = function (opts) {
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opts = Object.assign({
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null_value: null,
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render_text: (item_name) => item_name,
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on_update: () => {},
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}, opts);
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opts.container_id = `${opts.setting_name}_widget`;
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opts.value_id = `id_${opts.setting_name}`;
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opts.value = opts.value || page_params[opts.setting_name];
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const render_dropdown_list = require("../templates/settings/dropdown_list.hbs");
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const render = (value) => {
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$(`#${opts.container_id} #${opts.value_id}`).data("value", value);
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const elem = $(`#${opts.container_id} #${opts.setting_name}_name`);
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if (!value || value === opts.null_value) {
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elem.text(opts.default_text);
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elem.addClass("text-warning");
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elem.closest('.input-group').find('.dropdown_list_reset_button').hide();
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return;
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}
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// Happy path
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const item = opts.data.find(x => x.value === value.toString());
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const text = opts.render_text(item.name);
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elem.text(text);
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elem.removeClass('text-warning');
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elem.closest('.input-group').find('.dropdown_list_reset_button').show();
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};
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const update = (value) => {
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render(value);
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opts.on_update(value);
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};
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const register_event_handlers = () => {
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$(`#${opts.container_id} .dropdown-list-body`).on("click keypress", ".list_item", function (e) {
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const setting_elem = $(this).closest(`.${opts.setting_name}_setting`);
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if (e.type === "keypress") {
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if (e.which === 13) {
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setting_elem.find(".dropdown-menu").dropdown("toggle");
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} else {
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return;
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}
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}
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const value = $(this).attr('data-value');
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update(value);
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});
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$(`#${opts.container_id} .dropdown_list_reset_button`).click(function () {
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update(opts.null_value);
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});
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};
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const setup = () => {
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// populate the dropdown
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const dropdown_list_body = $(`#${opts.container_id} .dropdown-list-body`).expectOne();
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const search_input = $(`#${opts.container_id} .dropdown-search > input[type=text]`);
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const dropdown_toggle = $(`#${opts.container_id} .dropdown-toggle`);
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list_render.create(dropdown_list_body, opts.data, {
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name: `${opts.setting_name}_list`,
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modifier: function (item) {
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return render_dropdown_list({ item: item });
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},
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filter: {
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element: search_input,
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predicate: function (item, value) {
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return item.name.toLowerCase().includes(value);
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},
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},
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});
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$(`#${opts.container_id} .dropdown-search`).click(function (e) {
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e.stopPropagation();
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});
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dropdown_toggle.click(function () {
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search_input.val("").trigger("input");
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});
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dropdown_toggle.focus(function (e) {
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// On opening a Bootstrap Dropdown, the parent element recieves focus.
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// Here, we want our search input to have focus instead.
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e.preventDefault();
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search_input.focus();
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});
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search_input.keydown(function (e) {
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if (!/(38|40|27)/.test(e.keyCode)) {
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return;
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}
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e.preventDefault();
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const custom_event = jQuery.Event("keydown.dropdown.data-api", {
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keyCode: e.keyCode,
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which: e.keyCode,
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});
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dropdown_toggle.trigger(custom_event);
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});
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render(opts.value);
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register_event_handlers();
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};
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const value = () => {
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let val = $(`#${opts.container_id} #${opts.value_id}`).data('value');
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if (val === null) {
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val = '';
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}
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return val;
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};
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// Run setup() automatically on initialization.
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setup();
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return {
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render,
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value,
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update,
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};
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};
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window.settings_list_widget = DropdownListWidget;
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