112 lines
No EOL
3.4 KiB
Vue
112 lines
No EOL
3.4 KiB
Vue
<template>
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<div contenteditable @input="onchange" ref="text">
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</div>
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</template>
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<script>
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export default {
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name: 'FormatedText',
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props: {
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value: {
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type: String,
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required: true
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},
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format: {
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type: Function,
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default: null
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}
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},
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data() {
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return {
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selection: {start: 0, end: 0, direction: 'forward', type: 'Caret'}
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};
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},
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emits: ['input'],
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methods: {
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rawhtml(value) {
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if (typeof this.format === 'function') {
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return this.format(value.replace(/ /g, ' '));
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} else {
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return value;
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}
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},
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onchange(event) {
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const div = this.$refs.text;
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const sel = window.getSelection();
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if (sel.rangeCount > 0) {
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this.selection.start = this.calculateOffset(div, sel.anchorNode, sel.anchorOffset);
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this.selection.end = this.calculateOffset(div, sel.focusNode, sel.focusOffset);
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this.selection.direction = sel.direction;
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this.selection.type = sel.type;
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}
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this.$emit('input', event.target.innerText.replace(/ /g, ' ').replace(/\xA0/g, ' '));
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},
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calculateOffset(container, node, offset) {
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let position = 0;
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let found = false;
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const walk = (elem) => {
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if (elem === node) {
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found = true;
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return;
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}
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if (elem.nodeType === 3) {
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position += elem.length;
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} else {
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for (let i = 0; i < elem.childNodes.length; i++) {
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walk(elem.childNodes[i]);
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if (found) {
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return;
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}
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}
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}
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};
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walk(container);
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return position + offset;
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},
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findNode(container, offset) {
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let position = 0;
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let found = false;
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let node = null;
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const walk = (elem) => {
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if (position + elem.length >= offset) {
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found = true;
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node = elem;
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return;
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}
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if (elem.nodeType === 3) {
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position += elem.length;
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} else {
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for (let i = 0; i < elem.childNodes.length; i++) {
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walk(elem.childNodes[i]);
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if (found) {
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return;
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}
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}
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}
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};
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walk(container);
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return [node, offset - position]
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},
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},
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watch: {
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value() {
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if (this.selection) {
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const div = this.$refs.text;
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div.innerHTML = this.rawhtml(this.value);
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const range = document.createRange();
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const sel = window.getSelection();
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range.setStart(...this.findNode(div, this.selection.start));
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range.setEnd(...this.findNode(div, this.selection.end));
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sel.removeAllRanges();
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sel.addRange(range);
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}
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}
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},
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mounted() {
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const div = this.$refs.text;
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div.innerHTML = this.rawhtml(this.value);
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}
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};
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</script> |