BookStack/resources/js/components/pointer.js
2022-11-15 11:24:31 +00:00

128 lines
4.5 KiB
JavaScript

import * as DOM from "../services/dom";
import Clipboard from "clipboard/dist/clipboard.min";
import {Component} from "./component";
export class Pointer extends Component {
setup() {
this.container = this.$el;
this.pageId = this.$opts.pageId;
// Instance variables
this.showing = false;
this.isSelection = false;
this.pointerModeLink = true;
this.pointerSectionId = '';
this.setupListeners();
// Set up clipboard
new Clipboard(this.container.querySelector('button'));
}
setupListeners() {
// Select all contents on input click
DOM.onChildEvent(this.container, 'input', 'click', (event, input) => {
input.select();
event.stopPropagation();
});
// Prevent closing pointer when clicked or focused
DOM.onEvents(this.container, ['click', 'focus'], event => {
event.stopPropagation();
});
// Pointer mode toggle
DOM.onChildEvent(this.container, 'span.icon', 'click', (event, icon) => {
event.stopPropagation();
this.pointerModeLink = !this.pointerModeLink;
icon.querySelector('[data-icon="include"]').style.display = (!this.pointerModeLink) ? 'inline' : 'none';
icon.querySelector('[data-icon="link"]').style.display = (this.pointerModeLink) ? 'inline' : 'none';
this.updateForTarget();
});
// Hide pointer when clicking away
DOM.onEvents(document.body, ['click', 'focus'], event => {
if (!this.showing || this.isSelection) return;
this.hidePointer();
});
// Show pointer when selecting a single block of tagged content
const pageContent = document.querySelector('.page-content');
DOM.onEvents(pageContent, ['mouseup', 'keyup'], event => {
event.stopPropagation();
const targetEl = event.target.closest('[id^="bkmrk"]');
if (targetEl) {
this.showPointerAtTarget(targetEl, event.pageX);
}
});
}
hidePointer() {
this.container.style.display = null;
this.showing = false;
}
/**
* Move and display the pointer at the given element, targeting the given screen x-position if possible.
* @param {Element} element
* @param {Number} xPosition
*/
showPointerAtTarget(element, xPosition) {
const selection = window.getSelection();
if (selection.toString().length === 0) return;
// Show pointer and set link
this.pointerSectionId = element.id;
this.updateForTarget(element);
this.container.style.display = 'block';
const targetBounds = element.getBoundingClientRect();
const pointerBounds = this.container.getBoundingClientRect();
const xTarget = Math.min(Math.max(xPosition, targetBounds.left), targetBounds.right);
const xOffset = xTarget - (pointerBounds.width / 2);
const yOffset = (targetBounds.top - pointerBounds.height) - 16;
this.container.style.left = `${xOffset}px`;
this.container.style.top = `${yOffset}px`;
this.showing = true;
this.isSelection = true;
setTimeout(() => {
this.isSelection = false;
}, 100);
const scrollListener = () => {
this.hidePointer();
window.removeEventListener('scroll', scrollListener, {passive: true});
};
window.addEventListener('scroll', scrollListener, {passive: true});
}
/**
* Update the pointer inputs/content for the given target element.
* @param {?Element} element
*/
updateForTarget(element) {
let inputText = this.pointerModeLink ? window.baseUrl(`/link/${this.pageId}#${this.pointerSectionId}`) : `{{@${this.pageId}#${this.pointerSectionId}}}`;
if (this.pointerModeLink && !inputText.startsWith('http')) {
inputText = window.location.protocol + "//" + window.location.host + inputText;
}
this.container.querySelector('input').value = inputText;
// Update anchor if present
const editAnchor = this.container.querySelector('#pointer-edit');
if (editAnchor && element) {
const editHref = editAnchor.dataset.editHref;
const elementId = element.id;
// get the first 50 characters.
const queryContent = element.textContent && element.textContent.substring(0, 50);
editAnchor.href = `${editHref}?content-id=${elementId}&content-text=${encodeURIComponent(queryContent)}`;
}
}
}