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+/*
+ * Copyright (C) 2020 Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * PopupMenu
+ * SelectorObserver
+ */
+
+class SettingsDisplayController {
+ constructor(settingsController, modalController) {
+ this._settingsController = settingsController;
+ this._modalController = modalController;
+ this._contentNode = null;
+ this._topLink = null;
+ this._menuContainer = null;
+ this._openPopupMenus = new Set();
+ this._onMoreToggleClickBind = null;
+ this._onMenuButtonClickBind = null;
+ }
+
+ prepare() {
+ this._contentNode = document.querySelector('.content');
+ this._topLink = document.querySelector('.sidebar-top-link');
+ this._menuContainer = document.querySelector('#popup-menus');
+
+ const onFabButtonClick = this._onFabButtonClick.bind(this);
+ for (const fabButton of document.querySelectorAll('.fab-button')) {
+ fabButton.addEventListener('click', onFabButtonClick, false);
+ }
+
+ const onModalAction = this._onModalAction.bind(this);
+ for (const node of document.querySelectorAll('[data-modal-action]')) {
+ node.addEventListener('click', onModalAction, false);
+ }
+
+ const onSelectOnClickElementClick = this._onSelectOnClickElementClick.bind(this);
+ for (const node of document.querySelectorAll('[data-select-on-click]')) {
+ node.addEventListener('click', onSelectOnClickElementClick, false);
+ }
+
+ const onInputTabActionKeyDown = this._onInputTabActionKeyDown.bind(this);
+ for (const node of document.querySelectorAll('[data-tab-action]')) {
+ node.addEventListener('keydown', onInputTabActionKeyDown, false);
+ }
+
+ this._onMoreToggleClickBind = this._onMoreToggleClick.bind(this);
+ const moreSelectorObserver = new SelectorObserver({
+ selector: '.more-toggle',
+ onAdded: this._onMoreSetup.bind(this),
+ onRemoved: this._onMoreCleanup.bind(this)
+ });
+ moreSelectorObserver.observe(document.documentElement, false);
+
+ this._onMenuButtonClickBind = this._onMenuButtonClick.bind(this);
+ const menuSelectorObserver = new SelectorObserver({
+ selector: '[data-menu]',
+ onAdded: this._onMenuSetup.bind(this),
+ onRemoved: this._onMenuCleanup.bind(this)
+ });
+ menuSelectorObserver.observe(document.documentElement, false);
+
+ this._contentNode.addEventListener('scroll', this._onScroll.bind(this), {passive: true});
+ this._topLink.addEventListener('click', this._onTopLinkClick.bind(this), false);
+
+ window.addEventListener('keydown', this._onKeyDown.bind(this), false);
+ window.addEventListener('popstate', this._onPopState.bind(this), false);
+ this._updateScrollTarget();
+ }
+
+ // Private
+
+ _onMoreSetup(element) {
+ element.addEventListener('click', this._onMoreToggleClickBind, false);
+ return null;
+ }
+
+ _onMoreCleanup(element) {
+ element.removeEventListener('click', this._onMoreToggleClickBind, false);
+ }
+
+ _onMenuSetup(element) {
+ element.addEventListener('click', this._onMenuButtonClickBind, false);
+ return null;
+ }
+
+ _onMenuCleanup(element) {
+ element.removeEventListener('click', this._onMenuButtonClickBind, false);
+ }
+
+ _onMenuButtonClick(e) {
+ const element = e.currentTarget;
+ const {menu} = element.dataset;
+ this._showMenu(element, menu);
+ }
+
+ _onScroll(e) {
+ const content = e.currentTarget;
+ const topLink = this._topLink;
+ const scrollTop = content.scrollTop;
+ topLink.hidden = (scrollTop < 100);
+ }
+
+ _onFabButtonClick(e) {
+ const action = e.currentTarget.dataset.action;
+ switch (action) {
+ case 'toggle-sidebar':
+ document.body.classList.toggle('sidebar-visible');
+ break;
+ case 'toggle-preview-sidebar':
+ document.body.classList.toggle('preview-sidebar-visible');
+ break;
+ }
+ }
+
+ _onMoreToggleClick(e) {
+ const container = this._getMoreContainer(e.currentTarget);
+ if (container === null) { return; }
+
+ const more = container.querySelector('.more');
+ if (more === null) { return; }
+
+ const moreVisible = more.hidden;
+ more.hidden = !moreVisible;
+ for (const moreToggle of container.querySelectorAll('.more-toggle')) {
+ const container2 = this._getMoreContainer(moreToggle);
+ if (container2 === null) { continue; }
+
+ const more2 = container2.querySelector('.more');
+ if (more2 === null || more2 !== more) { continue; }
+
+ moreToggle.dataset.expanded = `${moreVisible}`;
+ }
+
+ e.preventDefault();
+ return false;
+ }
+
+ _onPopState() {
+ this._updateScrollTarget();
+ }
+
+ _onKeyDown(e) {
+ switch (e.code) {
+ case 'Escape':
+ if (!this._isElementAnInput(document.activeElement)) {
+ this._closeTopMenuOrModal();
+ e.preventDefault();
+ }
+ break;
+ }
+ }
+
+ _onModalAction(e) {
+ const node = e.currentTarget;
+ const {modalAction} = node.dataset;
+ if (typeof modalAction !== 'string') { return; }
+
+ let [action, target] = modalAction.split(',');
+ if (typeof target === 'undefined') {
+ const currentModal = node.closest('.modal-container');
+ if (currentModal === null) { return; }
+ target = currentModal.id;
+ }
+
+ const modal = this._modalController.getModal(target);
+ if (typeof modal === 'undefined') { return; }
+
+ switch (action) {
+ case 'show':
+ modal.setVisible(true);
+ break;
+ case 'hide':
+ modal.setVisible(false);
+ break;
+ case 'toggle':
+ modal.setVisible(!modal.isVisible());
+ break;
+ }
+
+ e.preventDefault();
+ }
+
+ _onSelectOnClickElementClick(e) {
+ if (e.button !== 0) { return; }
+
+ const node = e.currentTarget;
+ const range = document.createRange();
+ range.selectNode(node);
+
+ const selection = window.getSelection();
+ selection.removeAllRanges();
+ selection.addRange(range);
+
+ e.preventDefault();
+ e.stopPropagation();
+ return false;
+ }
+
+ _onTopLinkClick(e) {
+ if (window.location.hash.length > 0) {
+ const {pathname, search} = window.location;
+ const url = `${pathname}${search}`;
+ history.pushState(null, '', url);
+ }
+
+ const content = this._contentNode;
+ content.scrollTop = 0;
+
+ e.preventDefault();
+ e.stopPropagation();
+ return false;
+ }
+
+ _onClosePopupMenu({popupMenu, onClose}) {
+ this._openPopupMenus.delete(popupMenu);
+ popupMenu.off('closed', onClose);
+ }
+
+ _onInputTabActionKeyDown(e) {
+ if (e.key !== 'Tab' || e.ctrlKey) { return; }
+
+ const node = e.currentTarget;
+ const {tabAction} = node.dataset;
+ if (typeof tabAction !== 'string') { return; }
+
+ const args = tabAction.split(',');
+ switch (args[0]) {
+ case 'ignore':
+ e.preventDefault();
+ break;
+ case 'indent':
+ e.preventDefault();
+ this._indentInput(e, node, args);
+ break;
+ }
+ }
+
+ _updateScrollTarget() {
+ const hash = window.location.hash;
+ if (!hash.startsWith('#!')) { return; }
+
+ const content = this._contentNode;
+ const target = document.getElementById(hash.substring(2));
+ if (content === null || target === null) { return; }
+
+ const rect1 = content.getBoundingClientRect();
+ const rect2 = target.getBoundingClientRect();
+ content.scrollTop += rect2.top - rect1.top;
+ this._onScroll({currentTarget: content});
+ }
+
+ _getMoreContainer(link) {
+ const v = link.dataset.parentDistance;
+ const distance = v ? parseInt(v, 10) : 1;
+ if (Number.isNaN(distance)) { return null; }
+
+ for (let i = 0; i < distance; ++i) {
+ link = link.parentNode;
+ if (link === null) { break; }
+ }
+ return link;
+ }
+
+ _closeTopMenuOrModal() {
+ for (const popupMenu of this._openPopupMenus) {
+ popupMenu.close();
+ return;
+ }
+
+ const modal = this._modalController.getTopVisibleModal();
+ if (modal !== null) {
+ modal.setVisible(false);
+ }
+ }
+
+ _showMenu(element, menuName) {
+ const menu = this._settingsController.instantiateTemplate(menuName);
+ if (menu === null) { return; }
+
+ this._menuContainer.appendChild(menu);
+
+ const popupMenu = new PopupMenu(element, menu);
+ this._openPopupMenus.add(popupMenu);
+
+ const data = {popupMenu, onClose: null};
+ data.onClose = this._onClosePopupMenu.bind(this, data);
+
+ popupMenu.on('closed', data.onClose);
+ popupMenu.prepare();
+ }
+
+ _indentInput(e, node, args) {
+ let indent = '\t';
+ if (args.length > 1) {
+ const count = parseInt(args[1], 10);
+ indent = (Number.isFinite(count) && count >= 0 ? ' '.repeat(count) : args[1]);
+ }
+
+ const {selectionStart: start, selectionEnd: end, value} = node;
+ const lineStart = value.substring(0, start).lastIndexOf('\n') + 1;
+ const lineWhitespace = /^[ \t]*/.exec(value.substring(lineStart))[0];
+
+ if (e.shiftKey) {
+ const whitespaceLength = Math.max(0, Math.floor((lineWhitespace.length - 1) / 4) * 4);
+ const selectionStartNew = lineStart + whitespaceLength;
+ const selectionEndNew = lineStart + lineWhitespace.length;
+ const removeCount = selectionEndNew - selectionStartNew;
+ if (removeCount > 0) {
+ node.selectionStart = selectionStartNew;
+ node.selectionEnd = selectionEndNew;
+ document.execCommand('delete', false);
+ node.selectionStart = Math.max(lineStart, start - removeCount);
+ node.selectionEnd = Math.max(lineStart, end - removeCount);
+ }
+ } else {
+ if (indent.length > 0) {
+ const indentLength = (Math.ceil((start - lineStart + 1) / indent.length) * indent.length - (start - lineStart));
+ document.execCommand('insertText', false, indent.substring(0, indentLength));
+ }
+ }
+ }
+
+ _isElementAnInput(element) {
+ const type = element !== null ? element.nodeName.toUpperCase() : null;
+ switch (type) {
+ case 'INPUT':
+ case 'TEXTAREA':
+ case 'SELECT':
+ return true;
+ default:
+ return false;
+ }
+ }
+}