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musenalm/views/transform/multi-select-simple.js
Simon Martens 99c8996398 select element completion
2025-05-29 23:47:55 +02:00

532 lines
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JavaScript
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// --- Class Name Constants for MultiSelectSimple ---
const MSS_COMPONENT_WRAPPER_CLASS = "mss-component-wrapper";
const MSS_SELECTED_ITEMS_CONTAINER_CLASS = "mss-selected-items-container";
const MSS_SELECTED_ITEM_PILL_CLASS = "mss-selected-item-pill";
const MSS_SELECTED_ITEM_TEXT_CLASS = "mss-selected-item-text";
const MSS_SELECTED_ITEM_PILL_DETAIL_CLASS = "mss-selected-item-pill-detail"; // New class for pill detail
const MSS_SELECTED_ITEM_DELETE_BTN_CLASS = "mss-selected-item-delete-btn";
const MSS_INPUT_CONTROLS_CONTAINER_CLASS = "mss-input-controls-container";
const MSS_INPUT_WRAPPER_CLASS = "mss-input-wrapper";
const MSS_INPUT_WRAPPER_FOCUSED_CLASS = "mss-input-wrapper-focused";
const MSS_TEXT_INPUT_CLASS = "mss-text-input";
const MSS_CREATE_NEW_BUTTON_CLASS = "mss-create-new-button";
const MSS_OPTIONS_LIST_CLASS = "mss-options-list";
const MSS_OPTION_ITEM_CLASS = "mss-option-item";
const MSS_OPTION_ITEM_NAME_CLASS = "mss-option-item-name";
const MSS_OPTION_ITEM_DETAIL_CLASS = "mss-option-item-detail";
const MSS_HIGHLIGHTED_OPTION_CLASS = "mss-option-item-highlighted";
const MSS_HIDDEN_SELECT_CLASS = "mss-hidden-select";
const MSS_NO_ITEMS_TEXT_CLASS = "mss-no-items-text";
// State classes for MultiSelectSimple
const MSS_STATE_NO_SELECTION = "mss-state-no-selection";
const MSS_STATE_HAS_SELECTION = "mss-state-has-selection";
const MSS_STATE_LIST_OPEN = "mss-state-list-open";
// --- MultiSelectSimple Element ---
export class MultiSelectSimple extends HTMLElement {
static formAssociated = true;
constructor() {
super();
this.internals_ = this.attachInternals();
this._value = [];
this._options = [
{ id: "marie_curie", name: "Marie Curie", additional_data: "Physicist and Chemist" },
{ id: "leonardo_da_vinci", name: "Leonardo da Vinci", additional_data: "Polymath" },
{ id: "albert_einstein", name: "Albert Einstein", additional_data: "Theoretical Physicist" },
{ id: "ada_lovelace", name: "Ada Lovelace", additional_data: "Mathematician and Writer" },
{ id: "isaac_newton", name: "Isaac Newton", additional_data: "Mathematician and Physicist" },
{
id: "galileo_galilei",
name: "Galileo Galilei",
additional_data: "Astronomer and Physicist",
},
{ id: "charles_darwin", name: "Charles Darwin", additional_data: "Naturalist" },
{ id: "nikola_tesla", name: "Nikola Tesla", additional_data: "Inventor and Engineer" },
{ id: "jane_austen", name: "Jane Austen", additional_data: "Novelist" },
{
id: "william_shakespeare",
name: "William Shakespeare",
additional_data: "Playwright and Poet",
},
];
this._filteredOptions = [];
this._highlightedIndex = -1;
this._isOptionsListVisible = false;
this._placeholder = this.getAttribute("placeholder") || "Search items...";
this._showCreateButton = this.getAttribute("show-create-button") !== "false";
this._setupTemplates();
this._bindEventHandlers();
}
_setupTemplates() {
this.optionTemplate = document.createElement("template");
this.optionTemplate.innerHTML = `
<li role="option" class="${MSS_OPTION_ITEM_CLASS}">
<span data-ref="nameEl" class="${MSS_OPTION_ITEM_NAME_CLASS}"></span>
<span data-ref="detailEl" class="${MSS_OPTION_ITEM_DETAIL_CLASS}"></span>
</li>
`;
this.selectedItemTemplate = document.createElement("template");
// Apply new MSS_SELECTED_ITEM_PILL_DETAIL_CLASS to the detail span
this.selectedItemTemplate.innerHTML = `
<span class="${MSS_SELECTED_ITEM_PILL_CLASS} flex items-center">
<span data-ref="textEl" class="${MSS_SELECTED_ITEM_TEXT_CLASS}"></span>
<span data-ref="detailEl" class="${MSS_SELECTED_ITEM_PILL_DETAIL_CLASS} hidden"></span>
<button type="button" data-ref="deleteBtn" class="${MSS_SELECTED_ITEM_DELETE_BTN_CLASS}">&times;</button>
</span>
`;
}
_bindEventHandlers() {
this._handleInput = this._handleInput.bind(this);
this._handleKeyDown = this._handleKeyDown.bind(this);
this._handleFocus = this._handleFocus.bind(this);
this._handleBlur = this._handleBlur.bind(this);
this._handleOptionMouseDown = this._handleOptionMouseDown.bind(this);
this._handleOptionClick = this._handleOptionClick.bind(this);
this._handleCreateNewButtonClick = this._handleCreateNewButtonClick.bind(this);
this._handleSelectedItemsContainerClick = this._handleSelectedItemsContainerClick.bind(this);
}
_getItemById(id) {
return this._options.find((opt) => opt.id === id);
}
get placeholder() {
return this._placeholder;
}
set placeholder(value) {
this._placeholder = value;
if (this.inputElement) this.inputElement.placeholder = this._placeholder;
this.setAttribute("placeholder", value);
}
get showCreateButton() {
return this._showCreateButton;
}
set showCreateButton(value) {
const boolValue = String(value).toLowerCase() !== "false" && value !== false;
if (this._showCreateButton === boolValue) return;
this._showCreateButton = boolValue;
if (this.createNewButton)
this.createNewButton.classList.toggle("hidden", !this._showCreateButton);
this.setAttribute("show-create-button", this._showCreateButton ? "true" : "false");
}
setOptions(newOptions) {
if (
Array.isArray(newOptions) &&
newOptions.every((o) => o && typeof o.id === "string" && typeof o.name === "string")
) {
this._options = [...newOptions];
const validValues = this._value.filter((id) => this._getItemById(id));
if (validValues.length !== this._value.length) this.value = validValues;
else if (this.selectedItemsContainer) this._renderSelectedItems();
this._filteredOptions = [];
this._highlightedIndex = -1;
if (this.inputElement && this.inputElement.value)
this._handleInput({ target: this.inputElement });
else this._hideOptionsList();
} else console.error("setOptions expects an array of objects with id and name properties.");
}
get value() {
return this._value;
}
set value(newVal) {
const oldValString = JSON.stringify(this._value.sort());
if (Array.isArray(newVal)) {
this._value = [
...new Set(newVal.filter((id) => typeof id === "string" && this._getItemById(id))),
];
} else if (typeof newVal === "string" && newVal.trim() !== "") {
const singleId = newVal.trim();
if (this._getItemById(singleId) && !this._value.includes(singleId)) this._value = [singleId];
else if (!this._getItemById(singleId))
this._value = this._value.filter((id) => id !== singleId);
} else this._value = [];
const newValString = JSON.stringify(this._value.sort());
if (oldValString !== newValString) {
this._updateFormValue();
if (this.selectedItemsContainer) this._renderSelectedItems();
this._updateRootElementStateClasses();
this.dispatchEvent(new Event("change", { bubbles: true }));
}
}
get name() {
return this.getAttribute("name");
}
set name(value) {
this.setAttribute("name", value);
if (this.hiddenSelect) this.hiddenSelect.name = value;
}
connectedCallback() {
this._render();
this.inputControlsContainer = this.querySelector(`.${MSS_INPUT_CONTROLS_CONTAINER_CLASS}`);
this.inputWrapper = this.querySelector(`.${MSS_INPUT_WRAPPER_CLASS}`);
this.inputElement = this.querySelector(`.${MSS_TEXT_INPUT_CLASS}`);
this.createNewButton = this.querySelector(`.${MSS_CREATE_NEW_BUTTON_CLASS}`);
this.optionsListElement = this.querySelector(`.${MSS_OPTIONS_LIST_CLASS}`);
this.selectedItemsContainer = this.querySelector(`.${MSS_SELECTED_ITEMS_CONTAINER_CLASS}`);
this.hiddenSelect = this.querySelector(`.${MSS_HIDDEN_SELECT_CLASS}`);
this.placeholder = this.getAttribute("placeholder") || "Search items...";
this.showCreateButton = this.getAttribute("show-create-button") !== "false";
if (this.name && this.hiddenSelect) this.hiddenSelect.name = this.name;
this.inputElement.addEventListener("input", this._handleInput);
this.inputElement.addEventListener("keydown", this._handleKeyDown);
this.inputElement.addEventListener("focus", this._handleFocus);
this.inputElement.addEventListener("blur", this._handleBlur);
this.optionsListElement.addEventListener("mousedown", this._handleOptionMouseDown);
this.optionsListElement.addEventListener("click", this._handleOptionClick);
this.createNewButton.addEventListener("click", this._handleCreateNewButtonClick);
this.selectedItemsContainer.addEventListener("click", this._handleSelectedItemsContainerClick);
this._updateRootElementStateClasses();
if (this.hasAttribute("value")) {
const attrValue = this.getAttribute("value");
try {
this.value = JSON.parse(attrValue);
} catch (e) {
this.value = attrValue
.split(",")
.map((s) => s.trim())
.filter(Boolean);
}
} else {
this._renderSelectedItems();
this._synchronizeHiddenSelect();
}
if (this.hasAttribute("disabled")) this.disabledCallback(true);
}
disconnectedCallback() {
if (this.inputElement) {
this.inputElement.removeEventListener("input", this._handleInput);
this.inputElement.removeEventListener("keydown", this._handleKeyDown);
this.inputElement.removeEventListener("focus", this._handleFocus);
this.inputElement.removeEventListener("blur", this._handleBlur);
}
if (this.optionsListElement) {
this.optionsListElement.removeEventListener("mousedown", this._handleOptionMouseDown);
this.optionsListElement.removeEventListener("click", this._handleOptionClick);
}
if (this.createNewButton)
this.createNewButton.removeEventListener("click", this._handleCreateNewButtonClick);
if (this.selectedItemsContainer)
this.selectedItemsContainer.removeEventListener(
"click",
this._handleSelectedItemsContainerClick,
);
clearTimeout(this._blurTimeout);
}
static get observedAttributes() {
return ["disabled", "name", "value", "placeholder", "show-create-button"];
}
attributeChangedCallback(name, oldValue, newValue) {
if (oldValue === newValue) return;
if (name === "disabled") this.disabledCallback(this.hasAttribute("disabled"));
else if (name === "name" && this.hiddenSelect) this.hiddenSelect.name = newValue;
else if (name === "value" && this.inputElement) {
try {
this.value = JSON.parse(newValue);
} catch (e) {
this.value = newValue
.split(",")
.map((s) => s.trim())
.filter(Boolean);
}
} else if (name === "placeholder") this.placeholder = newValue;
else if (name === "show-create-button") this.showCreateButton = newValue;
}
formAssociatedCallback(form) {}
formDisabledCallback(disabled) {
this.disabledCallback(disabled);
}
formResetCallback() {
this.value = [];
this._hideOptionsList();
if (this.inputElement) this.inputElement.value = "";
this.placeholder = this.getAttribute("placeholder") || "Search items...";
this.showCreateButton = this.getAttribute("show-create-button") !== "false";
this._updateRootElementStateClasses();
this._renderSelectedItems();
}
formStateRestoreCallback(state, mode) {
this.value = Array.isArray(state) ? state : [];
this._updateRootElementStateClasses();
}
_synchronizeHiddenSelect() {
if (!this.hiddenSelect) return;
this.hiddenSelect.innerHTML = "";
this._value.forEach((id) => {
const option = document.createElement("option");
option.value = id;
const itemData = this._getItemById(id);
option.textContent = itemData ? itemData.name : id;
option.selected = true;
this.hiddenSelect.appendChild(option);
});
}
_updateFormValue() {
this.internals_.setFormValue(null);
this._synchronizeHiddenSelect();
}
disabledCallback(disabled) {
if (this.inputElement) this.inputElement.disabled = disabled;
if (this.createNewButton) this.createNewButton.disabled = disabled;
this.toggleAttribute("disabled", disabled);
this.querySelectorAll(`.${MSS_SELECTED_ITEM_DELETE_BTN_CLASS}`).forEach(
(btn) => (btn.disabled = disabled),
);
if (this.hiddenSelect) this.hiddenSelect.disabled = disabled;
if (disabled) this._hideOptionsList();
}
_updateRootElementStateClasses() {
this.classList.toggle(MSS_STATE_NO_SELECTION, this._value.length === 0);
this.classList.toggle(MSS_STATE_HAS_SELECTION, this._value.length > 0);
this.classList.toggle(MSS_STATE_LIST_OPEN, this._isOptionsListVisible);
}
_render() {
const componentId = this.id || `mss-${crypto.randomUUID().slice(0, 8)}`;
if (!this.id) this.setAttribute("id", componentId);
this.innerHTML = `
<style>
.${MSS_HIDDEN_SELECT_CLASS} { display: block !important; visibility: hidden !important; position: absolute !important; width: 0px !important; height: 0px !important; opacity: 0 !important; pointer-events: none !important; margin: -1px !important; padding: 0 !important; border: 0 !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; }
</style>
<div class="${MSS_COMPONENT_WRAPPER_CLASS} relative">
<div class="${MSS_SELECTED_ITEMS_CONTAINER_CLASS} flex flex-wrap gap-1 mb-1 min-h-[38px]" aria-live="polite" tabindex="-1"></div>
<div class="${MSS_INPUT_CONTROLS_CONTAINER_CLASS} flex items-center space-x-2">
<div class="${MSS_INPUT_WRAPPER_CLASS} relative rounded-md flex items-center flex-grow">
<input type="text"
class="${MSS_TEXT_INPUT_CLASS} w-full outline-none bg-transparent text-sm"
placeholder="${this.placeholder}"
aria-autocomplete="list"
aria-expanded="${this._isOptionsListVisible}"
aria-controls="options-list-${componentId}"
autocomplete="off" autocorrect="off" autocapitalize="none" spellcheck="false" role="combobox" />
</div>
<button type="button" class="${MSS_CREATE_NEW_BUTTON_CLASS} ${!this.showCreateButton ? "hidden" : ""}" title="Create new item from input">+</button>
</div>
<ul id="options-list-${componentId}" role="listbox" class="${MSS_OPTIONS_LIST_CLASS} absolute z-20 w-full max-h-60 overflow-y-auto mt-1 hidden"></ul>
<select multiple name="${this.getAttribute("name") || "mss_default_name"}" id="hidden-select-${componentId}" class="${MSS_HIDDEN_SELECT_CLASS}" aria-hidden="true"></select>
</div>
`;
}
_createSelectedItemElement(itemId) {
const itemData = this._getItemById(itemId);
if (!itemData) return null;
const fragment = this.selectedItemTemplate.content.cloneNode(true);
const pillEl = fragment.firstElementChild;
const textEl = pillEl.querySelector('[data-ref="textEl"]');
const detailEl = pillEl.querySelector('[data-ref="detailEl"]'); // This now uses MSS_SELECTED_ITEM_PILL_DETAIL_CLASS
const deleteBtn = pillEl.querySelector('[data-ref="deleteBtn"]');
textEl.textContent = itemData.name;
if (itemData.additional_data) {
detailEl.textContent = `(${itemData.additional_data})`;
detailEl.classList.remove("hidden"); // Toggle visibility via JS
} else {
detailEl.classList.add("hidden"); // Toggle visibility via JS
}
deleteBtn.setAttribute("aria-label", `Remove ${itemData.name}`);
deleteBtn.dataset.id = itemId;
deleteBtn.disabled = this.hasAttribute("disabled");
deleteBtn.addEventListener("click", (e) => {
e.stopPropagation();
this._handleDeleteSelectedItem(itemId);
});
return pillEl;
}
_renderSelectedItems() {
if (!this.selectedItemsContainer) return;
this.selectedItemsContainer.innerHTML = "";
if (this._value.length === 0) {
this.selectedItemsContainer.innerHTML = `<span class="${MSS_NO_ITEMS_TEXT_CLASS}">No items selected</span>`;
} else {
this._value.forEach((id) => {
const pillEl = this._createSelectedItemElement(id);
if (pillEl) this.selectedItemsContainer.appendChild(pillEl);
});
}
this._updateRootElementStateClasses();
}
_createOptionElement(itemData, index) {
const fragment = this.optionTemplate.content.cloneNode(true);
const li = fragment.firstElementChild;
const nameEl = li.querySelector('[data-ref="nameEl"]');
const detailEl = li.querySelector('[data-ref="detailEl"]');
nameEl.textContent = itemData.name;
detailEl.textContent = itemData.additional_data ? `(${itemData.additional_data})` : "";
li.dataset.id = itemData.id;
li.setAttribute("aria-selected", String(index === this._highlightedIndex));
const optionElementId = `option-${this.id || "mss"}-${itemData.id}`;
li.id = optionElementId;
if (index === this._highlightedIndex) {
li.classList.add(MSS_HIGHLIGHTED_OPTION_CLASS);
if (this.inputElement)
this.inputElement.setAttribute("aria-activedescendant", optionElementId);
}
return li;
}
_renderOptionsList() {
if (!this.optionsListElement || !this.inputElement) return;
this.optionsListElement.innerHTML = "";
this.inputElement.removeAttribute("aria-activedescendant");
if (this._filteredOptions.length === 0 || !this._isOptionsListVisible) {
this.optionsListElement.classList.add("hidden");
this.inputElement.setAttribute("aria-expanded", "false");
} else {
this.optionsListElement.classList.remove("hidden");
this.inputElement.setAttribute("aria-expanded", "true");
this._filteredOptions.forEach((item, index) => {
const optionEl = this._createOptionElement(item, index);
this.optionsListElement.appendChild(optionEl);
});
const highlightedElement = this.optionsListElement.querySelector(
`.${MSS_HIGHLIGHTED_OPTION_CLASS}`,
);
if (highlightedElement) {
highlightedElement.scrollIntoView({ block: "nearest" });
this.inputElement.setAttribute("aria-activedescendant", highlightedElement.id);
}
}
this._updateRootElementStateClasses();
}
_handleSelectedItemsContainerClick(event) {
if (
event.target === this.selectedItemsContainer &&
this.inputElement &&
!this.inputElement.disabled
) {
this.inputElement.focus();
}
}
_handleCreateNewButtonClick() {
if (this.hasAttribute("disabled") || !this.showCreateButton) return;
const inputValue = this.inputElement ? this.inputElement.value.trim() : "";
this.dispatchEvent(
new CustomEvent("createnew", {
detail: { value: inputValue },
bubbles: true,
composed: true,
}),
);
}
_handleInput(event) {
const searchTerm = event.target.value;
if (searchTerm.length === 0) {
this._filteredOptions = [];
this._isOptionsListVisible = false;
} else {
const searchTermLower = searchTerm.toLowerCase();
this._filteredOptions = this._options.filter((item) => {
if (this._value.includes(item.id)) return false;
const nameMatch = item.name.toLowerCase().includes(searchTermLower);
const additionalDataMatch =
item.additional_data && item.additional_data.toLowerCase().includes(searchTermLower);
return nameMatch || additionalDataMatch;
});
this._isOptionsListVisible = this._filteredOptions.length > 0;
}
this._highlightedIndex = this._filteredOptions.length > 0 ? 0 : -1;
this._renderOptionsList();
}
_handleKeyDown(event) {
if (this.inputElement.disabled) return;
// Removed: Backspace on empty input to delete last item
// if (event.key === "Backspace" && this.inputElement.value === "" && this._value.length > 0) {
// event.preventDefault();
// const lastItemId = this._value[this._value.length - 1];
// this._handleDeleteSelectedItem(lastItemId);
// return;
// }
if (!this._isOptionsListVisible || this._filteredOptions.length === 0) {
if (event.key === "Escape") this._hideOptionsList();
if (
(event.key === "ArrowDown" || event.key === "ArrowUp") &&
this.inputElement.value.length > 0
) {
this._handleInput({ target: this.inputElement });
}
return;
}
switch (event.key) {
case "ArrowDown":
event.preventDefault();
this._highlightedIndex = (this._highlightedIndex + 1) % this._filteredOptions.length;
this._renderOptionsList();
break;
case "ArrowUp":
event.preventDefault();
this._highlightedIndex =
(this._highlightedIndex - 1 + this._filteredOptions.length) %
this._filteredOptions.length;
this._renderOptionsList();
break;
case "Enter":
event.preventDefault();
if (this._highlightedIndex > -1 && this._filteredOptions[this._highlightedIndex]) {
this._selectItem(this._filteredOptions[this._highlightedIndex].id);
}
break;
case "Escape":
event.preventDefault();
this._hideOptionsList();
break;
case "Tab":
this._hideOptionsList();
break;
}
}
_hideOptionsList() {
this._isOptionsListVisible = false;
this._highlightedIndex = -1;
if (this.optionsListElement) this._renderOptionsList();
}
_handleFocus() {
if (this.inputElement.disabled) return;
if (this.inputWrapper) this.inputWrapper.classList.add(MSS_INPUT_WRAPPER_FOCUSED_CLASS);
if (this.inputElement.value.length > 0) this._handleInput({ target: this.inputElement });
this._updateRootElementStateClasses();
}
_blurTimeout = null;
_handleBlur() {
if (this.inputWrapper) this.inputWrapper.classList.remove(MSS_INPUT_WRAPPER_FOCUSED_CLASS);
this._blurTimeout = setTimeout(() => {
if (!this.contains(document.activeElement)) this._hideOptionsList();
}, 150);
}
_handleOptionMouseDown(event) {
event.preventDefault();
}
_handleOptionClick(event) {
const li = event.target.closest("li[data-id]");
if (li && li.dataset.id) this._selectItem(li.dataset.id);
}
_selectItem(itemId) {
if (itemId && !this._value.includes(itemId)) this.value = [...this._value, itemId];
if (this.inputElement) this.inputElement.value = "";
this._filteredOptions = [];
this._hideOptionsList();
if (this.inputElement && !this.hasAttribute("disabled")) this.inputElement.focus();
}
_handleDeleteSelectedItem(itemId) {
this.value = this._value.filter((id) => id !== itemId);
if (this.inputElement && this.inputElement.value)
this._handleInput({ target: this.inputElement });
if (this.inputElement && !this.hasAttribute("disabled")) this.inputElement.focus();
}
}
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