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https://github.com/jellyfin/jellyfin-web
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multiple modules resolution
This commit is contained in:
vitorsemeano
parent
efa3ff1730
commit
b293f6e0f9
6 changed files with 9 additions and 18 deletions
551
src/components/focusManager.js
Normal file
551
src/components/focusManager.js
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@ -0,0 +1,551 @@
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define(['dom'], function (dom) {
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'use strict';
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var scopes = [];
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function pushScope(elem) {
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scopes.push(elem);
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}
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function popScope(elem) {
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if (scopes.length) {
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scopes.length -= 1;
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}
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}
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function autoFocus(view, defaultToFirst, findAutoFocusElement) {
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var element;
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if (findAutoFocusElement !== false) {
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element = view.querySelector('*[autofocus]');
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if (element) {
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focus(element);
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return element;
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}
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}
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if (defaultToFirst !== false) {
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element = getFocusableElements(view, 1, 'noautofocus')[0];
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if (element) {
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focus(element);
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return element;
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}
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}
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return null;
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}
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function focus(element) {
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try {
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element.focus({
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preventScroll: true
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});
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} catch (err) {
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console.log('Error in focusManager.autoFocus: ' + err);
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}
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}
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var focusableTagNames = ['INPUT', 'TEXTAREA', 'SELECT', 'BUTTON', 'A'];
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var focusableContainerTagNames = ['BODY', 'DIALOG'];
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var focusableQuery = focusableTagNames.map(function (t) {
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if (t === 'INPUT') {
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t += ':not([type="range"]):not([type="file"])';
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}
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return t + ':not([tabindex="-1"]):not(:disabled)';
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}).join(',') + ',.focusable';
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function isFocusable(elem) {
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if (focusableTagNames.indexOf(elem.tagName) !== -1) {
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return true;
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}
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if (elem.classList && elem.classList.contains('focusable')) {
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return true;
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}
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return false;
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}
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function normalizeFocusable(elem, originalElement) {
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if (elem) {
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var tagName = elem.tagName;
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if (!tagName || tagName === 'HTML' || tagName === 'BODY') {
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elem = originalElement;
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}
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}
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return elem;
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}
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function focusableParent(elem) {
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var originalElement = elem;
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while (!isFocusable(elem)) {
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var parent = elem.parentNode;
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if (!parent) {
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return normalizeFocusable(elem, originalElement);
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}
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elem = parent;
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}
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return normalizeFocusable(elem, originalElement);
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}
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// Determines if a focusable element can be focused at a given point in time
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function isCurrentlyFocusableInternal(elem) {
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// http://stackoverflow.com/questions/19669786/check-if-element-is-visible-in-dom
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if (elem.offsetParent === null) {
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return false;
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}
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return true;
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}
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// Determines if a focusable element can be focused at a given point in time
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function isCurrentlyFocusable(elem) {
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if (elem.disabled) {
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return false;
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}
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if (elem.getAttribute('tabindex') === "-1") {
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return false;
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}
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if (elem.tagName === 'INPUT') {
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var type = elem.type;
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if (type === 'range') {
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return false;
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}
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if (type === 'file') {
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return false;
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}
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}
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return isCurrentlyFocusableInternal(elem);
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}
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function getDefaultScope() {
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return scopes[0] || document.body;
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}
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function getFocusableElements(parent, limit, excludeClass) {
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var elems = (parent || getDefaultScope()).querySelectorAll(focusableQuery);
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var focusableElements = [];
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for (var i = 0, length = elems.length; i < length; i++) {
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var elem = elems[i];
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if (excludeClass && elem.classList.contains(excludeClass)) {
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continue;
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}
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if (isCurrentlyFocusableInternal(elem)) {
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focusableElements.push(elem);
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if (limit && focusableElements.length >= limit) {
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break;
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}
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}
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}
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return focusableElements;
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}
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function isFocusContainer(elem, direction) {
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if (focusableContainerTagNames.indexOf(elem.tagName) !== -1) {
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return true;
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}
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var classList = elem.classList;
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if (classList.contains('focuscontainer')) {
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return true;
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}
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if (direction === 0) {
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if (classList.contains('focuscontainer-x')) {
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return true;
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}
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if (classList.contains('focuscontainer-left')) {
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return true;
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}
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}
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else if (direction === 1) {
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if (classList.contains('focuscontainer-x')) {
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return true;
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}
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if (classList.contains('focuscontainer-right')) {
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return true;
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}
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}
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else if (direction === 2) {
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if (classList.contains('focuscontainer-y')) {
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return true;
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}
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}
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else if (direction === 3) {
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if (classList.contains('focuscontainer-y')) {
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return true;
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}
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if (classList.contains('focuscontainer-down')) {
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return true;
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}
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}
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return false;
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}
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function getFocusContainer(elem, direction) {
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while (!isFocusContainer(elem, direction)) {
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elem = elem.parentNode;
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if (!elem) {
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return getDefaultScope();
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}
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}
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return elem;
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}
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function getOffset(elem) {
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var box;
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// Support: BlackBerry 5, iOS 3 (original iPhone)
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// If we don't have gBCR, just use 0,0 rather than error
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if (elem.getBoundingClientRect) {
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box = elem.getBoundingClientRect();
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} else {
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box = {
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top: 0,
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left: 0,
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width: 0,
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height: 0
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};
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}
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if (box.right === null) {
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// Create a new object because some browsers will throw an error when trying to set data onto the Rect object
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var newBox = {
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top: box.top,
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left: box.left,
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width: box.width,
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height: box.height
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};
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box = newBox;
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box.right = box.left + box.width;
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box.bottom = box.top + box.height;
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}
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return box;
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}
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function nav(activeElement, direction, container, focusableElements) {
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activeElement = activeElement || document.activeElement;
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if (activeElement) {
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activeElement = focusableParent(activeElement);
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}
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container = container || (activeElement ? getFocusContainer(activeElement, direction) : getDefaultScope());
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if (!activeElement) {
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autoFocus(container, true, false);
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return;
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}
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var focusableContainer = dom.parentWithClass(activeElement, 'focusable');
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var rect = getOffset(activeElement);
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// Get elements and work out x/y points
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var cache = [],
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point1x = parseFloat(rect.left) || 0,
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point1y = parseFloat(rect.top) || 0,
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point2x = parseFloat(point1x + rect.width - 1) || point1x,
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point2y = parseFloat(point1y + rect.height - 1) || point1y,
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// Shortcuts to help with compression
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min = Math.min,
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max = Math.max;
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var sourceMidX = rect.left + (rect.width / 2);
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var sourceMidY = rect.top + (rect.height / 2);
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var focusable = focusableElements || container.querySelectorAll(focusableQuery);
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var maxDistance = Infinity;
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var minDistance = maxDistance;
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var nearestElement;
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for (var i = 0, length = focusable.length; i < length; i++) {
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var curr = focusable[i];
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if (curr === activeElement) {
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continue;
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}
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// Don't refocus into the same container
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if (curr === focusableContainer) {
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continue;
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}
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//if (!isCurrentlyFocusableInternal(curr)) {
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// continue;
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//}
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var elementRect = getOffset(curr);
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// not currently visible
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if (!elementRect.width && !elementRect.height) {
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continue;
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}
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switch (direction) {
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case 0:
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// left
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if (elementRect.left >= rect.left) {
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continue;
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}
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if (elementRect.right === rect.right) {
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continue;
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}
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break;
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case 1:
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// right
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if (elementRect.right <= rect.right) {
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continue;
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}
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if (elementRect.left === rect.left) {
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continue;
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}
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break;
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case 2:
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// up
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if (elementRect.top >= rect.top) {
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continue;
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}
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if (elementRect.bottom >= rect.bottom) {
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continue;
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}
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break;
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case 3:
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// down
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if (elementRect.bottom <= rect.bottom) {
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continue;
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}
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if (elementRect.top <= rect.top) {
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continue;
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}
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break;
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default:
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break;
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}
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var x = elementRect.left,
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y = elementRect.top,
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x2 = x + elementRect.width - 1,
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y2 = y + elementRect.height - 1;
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var intersectX = intersects(point1x, point2x, x, x2);
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var intersectY = intersects(point1y, point2y, y, y2);
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var midX = elementRect.left + (elementRect.width / 2);
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var midY = elementRect.top + (elementRect.height / 2);
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var distX;
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var distY;
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switch (direction) {
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case 0:
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// left
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distX = Math.abs(point1x - Math.min(point1x, x2));
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distY = intersectY ? 0 : Math.abs(sourceMidY - midY);
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break;
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case 1:
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// right
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distX = Math.abs(point2x - Math.max(point2x, x));
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distY = intersectY ? 0 : Math.abs(sourceMidY - midY);
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break;
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case 2:
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// up
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distY = Math.abs(point1y - Math.min(point1y, y2));
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distX = intersectX ? 0 : Math.abs(sourceMidX - midX);
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break;
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case 3:
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// down
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distY = Math.abs(point2y - Math.max(point2y, y));
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distX = intersectX ? 0 : Math.abs(sourceMidX - midX);
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break;
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default:
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break;
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}
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var dist = Math.sqrt(distX * distX + distY * distY);
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if (dist < minDistance) {
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nearestElement = curr;
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minDistance = dist;
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}
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}
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if (nearestElement) {
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// See if there's a focusable container, and if so, send the focus command to that
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if (activeElement) {
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var nearestElementFocusableParent = dom.parentWithClass(nearestElement, 'focusable');
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if (nearestElementFocusableParent && nearestElementFocusableParent !== nearestElement) {
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if (focusableContainer !== nearestElementFocusableParent) {
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nearestElement = nearestElementFocusableParent;
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}
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}
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}
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focus(nearestElement);
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}
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}
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function intersectsInternal(a1, a2, b1, b2) {
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return (b1 >= a1 && b1 <= a2) || (b2 >= a1 && b2 <= a2);
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}
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function intersects(a1, a2, b1, b2) {
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return intersectsInternal(a1, a2, b1, b2) || intersectsInternal(b1, b2, a1, a2);
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}
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function sendText(text) {
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var elem = document.activeElement;
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elem.value = text;
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}
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function focusFirst(container, focusableSelector) {
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var elems = container.querySelectorAll(focusableSelector);
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for (var i = 0, length = elems.length; i < length; i++) {
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var elem = elems[i];
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if (isCurrentlyFocusableInternal(elem)) {
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focus(elem);
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break;
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}
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}
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}
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function focusLast(container, focusableSelector) {
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var elems = [].slice.call(container.querySelectorAll(focusableSelector), 0).reverse();
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for (var i = 0, length = elems.length; i < length; i++) {
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var elem = elems[i];
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if (isCurrentlyFocusableInternal(elem)) {
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focus(elem);
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break;
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}
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}
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}
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function moveFocus(sourceElement, container, focusableSelector, offset) {
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var elems = container.querySelectorAll(focusableSelector);
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var list = [];
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var i, length, elem;
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for (i = 0, length = elems.length; i < length; i++) {
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elem = elems[i];
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if (isCurrentlyFocusableInternal(elem)) {
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list.push(elem);
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}
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}
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var currentIndex = -1;
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for (i = 0, length = list.length; i < length; i++) {
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elem = list[i];
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if (sourceElement === elem || elem.contains(sourceElement)) {
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currentIndex = i;
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break;
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}
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}
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if (currentIndex === -1) {
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return;
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}
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var newIndex = currentIndex + offset;
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newIndex = Math.max(0, newIndex);
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newIndex = Math.min(newIndex, list.length - 1);
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var newElem = list[newIndex];
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if (newElem) {
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focus(newElem);
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}
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}
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return {
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autoFocus: autoFocus,
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focus: focus,
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focusableParent: focusableParent,
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getFocusableElements: getFocusableElements,
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moveLeft: function (sourceElement, options) {
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var container = options ? options.container : null;
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var focusableElements = options ? options.focusableElements : null;
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nav(sourceElement, 0, container, focusableElements);
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},
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moveRight: function (sourceElement, options) {
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var container = options ? options.container : null;
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var focusableElements = options ? options.focusableElements : null;
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nav(sourceElement, 1, container, focusableElements);
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},
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moveUp: function (sourceElement, options) {
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var container = options ? options.container : null;
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var focusableElements = options ? options.focusableElements : null;
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nav(sourceElement, 2, container, focusableElements);
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},
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moveDown: function (sourceElement, options) {
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var container = options ? options.container : null;
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var focusableElements = options ? options.focusableElements : null;
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nav(sourceElement, 3, container, focusableElements);
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},
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sendText: sendText,
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isCurrentlyFocusable: isCurrentlyFocusable,
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pushScope: pushScope,
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popScope: popScope,
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focusFirst: focusFirst,
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focusLast: focusLast,
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moveFocus: moveFocus
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};
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});
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