yomichan/ext/bg/js/settings2/settings-display-controller.js
toasted-nutbread a02891e52c
Update copyright year (#1194)
* Update copyright year

* Remove redundant Author info
2021-01-01 14:50:41 -05:00

321 lines
10 KiB
JavaScript

/*
* Copyright (C) 2020-2021 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._menuContainer = null;
this._openPopupMenus = new Set();
this._onMoreToggleClickBind = null;
this._onMenuButtonClickBind = null;
}
prepare() {
this._contentNode = document.querySelector('.content');
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);
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);
}
_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;
}
_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;
}
_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;
}
}
}