321 lines
10 KiB
JavaScript
321 lines
10 KiB
JavaScript
/*
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* Copyright (C) 2020-2021 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/* global
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* PopupMenu
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* SelectorObserver
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*/
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class SettingsDisplayController {
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constructor(settingsController, modalController) {
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this._settingsController = settingsController;
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this._modalController = modalController;
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this._contentNode = null;
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this._menuContainer = null;
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this._openPopupMenus = new Set();
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this._onMoreToggleClickBind = null;
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this._onMenuButtonClickBind = null;
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}
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prepare() {
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this._contentNode = document.querySelector('.content');
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this._menuContainer = document.querySelector('#popup-menus');
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const onFabButtonClick = this._onFabButtonClick.bind(this);
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for (const fabButton of document.querySelectorAll('.fab-button')) {
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fabButton.addEventListener('click', onFabButtonClick, false);
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}
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const onModalAction = this._onModalAction.bind(this);
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for (const node of document.querySelectorAll('[data-modal-action]')) {
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node.addEventListener('click', onModalAction, false);
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}
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const onSelectOnClickElementClick = this._onSelectOnClickElementClick.bind(this);
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for (const node of document.querySelectorAll('[data-select-on-click]')) {
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node.addEventListener('click', onSelectOnClickElementClick, false);
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}
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const onInputTabActionKeyDown = this._onInputTabActionKeyDown.bind(this);
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for (const node of document.querySelectorAll('[data-tab-action]')) {
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node.addEventListener('keydown', onInputTabActionKeyDown, false);
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}
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this._onMoreToggleClickBind = this._onMoreToggleClick.bind(this);
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const moreSelectorObserver = new SelectorObserver({
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selector: '.more-toggle',
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onAdded: this._onMoreSetup.bind(this),
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onRemoved: this._onMoreCleanup.bind(this)
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});
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moreSelectorObserver.observe(document.documentElement, false);
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this._onMenuButtonClickBind = this._onMenuButtonClick.bind(this);
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const menuSelectorObserver = new SelectorObserver({
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selector: '[data-menu]',
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onAdded: this._onMenuSetup.bind(this),
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onRemoved: this._onMenuCleanup.bind(this)
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});
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menuSelectorObserver.observe(document.documentElement, false);
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window.addEventListener('keydown', this._onKeyDown.bind(this), false);
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window.addEventListener('popstate', this._onPopState.bind(this), false);
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this._updateScrollTarget();
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}
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// Private
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_onMoreSetup(element) {
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element.addEventListener('click', this._onMoreToggleClickBind, false);
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return null;
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}
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_onMoreCleanup(element) {
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element.removeEventListener('click', this._onMoreToggleClickBind, false);
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}
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_onMenuSetup(element) {
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element.addEventListener('click', this._onMenuButtonClickBind, false);
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return null;
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}
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_onMenuCleanup(element) {
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element.removeEventListener('click', this._onMenuButtonClickBind, false);
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}
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_onMenuButtonClick(e) {
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const element = e.currentTarget;
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const {menu} = element.dataset;
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this._showMenu(element, menu);
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}
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_onFabButtonClick(e) {
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const action = e.currentTarget.dataset.action;
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switch (action) {
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case 'toggle-sidebar':
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document.body.classList.toggle('sidebar-visible');
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break;
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case 'toggle-preview-sidebar':
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document.body.classList.toggle('preview-sidebar-visible');
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break;
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}
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}
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_onMoreToggleClick(e) {
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const container = this._getMoreContainer(e.currentTarget);
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if (container === null) { return; }
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const more = container.querySelector('.more');
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if (more === null) { return; }
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const moreVisible = more.hidden;
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more.hidden = !moreVisible;
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for (const moreToggle of container.querySelectorAll('.more-toggle')) {
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const container2 = this._getMoreContainer(moreToggle);
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if (container2 === null) { continue; }
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const more2 = container2.querySelector('.more');
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if (more2 === null || more2 !== more) { continue; }
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moreToggle.dataset.expanded = `${moreVisible}`;
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}
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e.preventDefault();
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return false;
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}
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_onPopState() {
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this._updateScrollTarget();
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}
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_onKeyDown(e) {
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switch (e.code) {
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case 'Escape':
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if (!this._isElementAnInput(document.activeElement)) {
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this._closeTopMenuOrModal();
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e.preventDefault();
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}
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break;
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}
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}
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_onModalAction(e) {
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const node = e.currentTarget;
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const {modalAction} = node.dataset;
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if (typeof modalAction !== 'string') { return; }
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let [action, target] = modalAction.split(',');
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if (typeof target === 'undefined') {
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const currentModal = node.closest('.modal-container');
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if (currentModal === null) { return; }
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target = currentModal.id;
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}
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const modal = this._modalController.getModal(target);
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if (typeof modal === 'undefined') { return; }
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switch (action) {
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case 'show':
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modal.setVisible(true);
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break;
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case 'hide':
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modal.setVisible(false);
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break;
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case 'toggle':
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modal.setVisible(!modal.isVisible());
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break;
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}
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e.preventDefault();
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}
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_onSelectOnClickElementClick(e) {
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if (e.button !== 0) { return; }
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const node = e.currentTarget;
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const range = document.createRange();
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range.selectNode(node);
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const selection = window.getSelection();
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selection.removeAllRanges();
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selection.addRange(range);
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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_onClosePopupMenu({popupMenu, onClose}) {
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this._openPopupMenus.delete(popupMenu);
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popupMenu.off('closed', onClose);
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}
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_onInputTabActionKeyDown(e) {
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if (e.key !== 'Tab' || e.ctrlKey) { return; }
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const node = e.currentTarget;
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const {tabAction} = node.dataset;
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if (typeof tabAction !== 'string') { return; }
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const args = tabAction.split(',');
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switch (args[0]) {
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case 'ignore':
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e.preventDefault();
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break;
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case 'indent':
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e.preventDefault();
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this._indentInput(e, node, args);
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break;
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}
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}
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_updateScrollTarget() {
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const hash = window.location.hash;
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if (!hash.startsWith('#!')) { return; }
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const content = this._contentNode;
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const target = document.getElementById(hash.substring(2));
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if (content === null || target === null) { return; }
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const rect1 = content.getBoundingClientRect();
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const rect2 = target.getBoundingClientRect();
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content.scrollTop += rect2.top - rect1.top;
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}
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_getMoreContainer(link) {
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const v = link.dataset.parentDistance;
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const distance = v ? parseInt(v, 10) : 1;
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if (Number.isNaN(distance)) { return null; }
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for (let i = 0; i < distance; ++i) {
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link = link.parentNode;
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if (link === null) { break; }
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}
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return link;
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}
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_closeTopMenuOrModal() {
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for (const popupMenu of this._openPopupMenus) {
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popupMenu.close();
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return;
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}
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const modal = this._modalController.getTopVisibleModal();
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if (modal !== null) {
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modal.setVisible(false);
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}
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}
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_showMenu(element, menuName) {
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const menu = this._settingsController.instantiateTemplate(menuName);
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if (menu === null) { return; }
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this._menuContainer.appendChild(menu);
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const popupMenu = new PopupMenu(element, menu);
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this._openPopupMenus.add(popupMenu);
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const data = {popupMenu, onClose: null};
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data.onClose = this._onClosePopupMenu.bind(this, data);
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popupMenu.on('closed', data.onClose);
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popupMenu.prepare();
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}
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_indentInput(e, node, args) {
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let indent = '\t';
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if (args.length > 1) {
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const count = parseInt(args[1], 10);
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indent = (Number.isFinite(count) && count >= 0 ? ' '.repeat(count) : args[1]);
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}
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const {selectionStart: start, selectionEnd: end, value} = node;
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const lineStart = value.substring(0, start).lastIndexOf('\n') + 1;
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const lineWhitespace = /^[ \t]*/.exec(value.substring(lineStart))[0];
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if (e.shiftKey) {
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const whitespaceLength = Math.max(0, Math.floor((lineWhitespace.length - 1) / 4) * 4);
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const selectionStartNew = lineStart + whitespaceLength;
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const selectionEndNew = lineStart + lineWhitespace.length;
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const removeCount = selectionEndNew - selectionStartNew;
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if (removeCount > 0) {
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node.selectionStart = selectionStartNew;
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node.selectionEnd = selectionEndNew;
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document.execCommand('delete', false);
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node.selectionStart = Math.max(lineStart, start - removeCount);
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node.selectionEnd = Math.max(lineStart, end - removeCount);
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}
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} else {
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if (indent.length > 0) {
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const indentLength = (Math.ceil((start - lineStart + 1) / indent.length) * indent.length - (start - lineStart));
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document.execCommand('insertText', false, indent.substring(0, indentLength));
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}
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}
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}
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_isElementAnInput(element) {
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const type = element !== null ? element.nodeName.toUpperCase() : null;
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switch (type) {
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case 'INPUT':
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case 'TEXTAREA':
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case 'SELECT':
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return true;
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default:
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return false;
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}
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}
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}
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