mirror of
https://github.com/BookStackApp/BookStack.git
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162 lines
4.5 KiB
JavaScript
162 lines
4.5 KiB
JavaScript
import {Component} from "./component";
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function reverseMap(map) {
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const reversed = {};
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for (const [key, value] of Object.entries(map)) {
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reversed[value] = key;
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}
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return reversed;
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}
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export class Shortcuts extends Component {
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setup() {
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this.container = this.$el;
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this.mapById = JSON.parse(this.$opts.keyMap);
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this.mapByShortcut = reverseMap(this.mapById);
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this.hintsShowing = false;
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this.hideHints = this.hideHints.bind(this);
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this.setupListeners();
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}
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setupListeners() {
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window.addEventListener('keydown', event => {
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if (event.target.closest('input, select, textarea')) {
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return;
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}
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this.handleShortcutPress(event);
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});
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window.addEventListener('keydown', event => {
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if (event.key === '?') {
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this.hintsShowing ? this.hideHints() : this.showHints();
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}
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});
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}
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/**
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* @param {KeyboardEvent} event
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*/
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handleShortcutPress(event) {
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const keys = [
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event.ctrlKey ? 'Ctrl' : '',
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event.metaKey ? 'Cmd' : '',
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event.key,
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];
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const combo = keys.filter(s => Boolean(s)).join(' + ');
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const shortcutId = this.mapByShortcut[combo];
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if (shortcutId) {
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const wasHandled = this.runShortcut(shortcutId);
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if (wasHandled) {
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event.preventDefault();
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}
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}
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}
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/**
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* Run the given shortcut, and return a boolean to indicate if the event
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* was successfully handled by a shortcut action.
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* @param {String} id
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* @return {boolean}
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*/
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runShortcut(id) {
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const el = this.container.querySelector(`[data-shortcut="${id}"]`);
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if (!el) {
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return false;
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}
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if (el.matches('input, textarea, select')) {
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el.focus();
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return true;
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}
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if (el.matches('a, button')) {
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el.click();
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return true;
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}
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if (el.matches('div[tabindex]')) {
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el.click();
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el.focus();
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return true;
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}
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console.error(`Shortcut attempted to be ran for element type that does not have handling setup`, el);
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return false;
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}
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showHints() {
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const wrapper = document.createElement('div');
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wrapper.classList.add('shortcut-container');
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this.container.append(wrapper);
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const shortcutEls = this.container.querySelectorAll('[data-shortcut]');
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const displayedIds = new Set();
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for (const shortcutEl of shortcutEls) {
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const id = shortcutEl.getAttribute('data-shortcut');
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if (displayedIds.has(id)) {
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continue;
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}
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const key = this.mapById[id];
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this.showHintLabel(shortcutEl, key, wrapper);
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displayedIds.add(id);
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}
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window.addEventListener('scroll', this.hideHints);
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window.addEventListener('focus', this.hideHints);
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window.addEventListener('blur', this.hideHints);
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window.addEventListener('click', this.hideHints);
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this.hintsShowing = true;
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}
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/**
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* @param {Element} targetEl
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* @param {String} key
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* @param {Element} wrapper
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*/
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showHintLabel(targetEl, key, wrapper) {
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const targetBounds = targetEl.getBoundingClientRect();
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const label = document.createElement('div');
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label.classList.add('shortcut-hint');
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label.textContent = key;
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const linkage = document.createElement('div');
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linkage.classList.add('shortcut-linkage');
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linkage.style.left = targetBounds.x + 'px';
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linkage.style.top = targetBounds.y + 'px';
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linkage.style.width = targetBounds.width + 'px';
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linkage.style.height = targetBounds.height + 'px';
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wrapper.append(label, linkage);
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const labelBounds = label.getBoundingClientRect();
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label.style.insetInlineStart = `${((targetBounds.x + targetBounds.width) - (labelBounds.width + 6))}px`;
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label.style.insetBlockStart = `${(targetBounds.y + (targetBounds.height - labelBounds.height) / 2)}px`;
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}
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hideHints() {
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const wrapper = this.container.querySelector('.shortcut-container');
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wrapper.remove();
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window.removeEventListener('scroll', this.hideHints);
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window.removeEventListener('focus', this.hideHints);
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window.removeEventListener('blur', this.hideHints);
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window.removeEventListener('click', this.hideHints);
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this.hintsShowing = false;
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}
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} |