79 lines
No EOL
2.3 KiB
Vue
79 lines
No EOL
2.3 KiB
Vue
<template>
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<div contenteditable @input="onchange" ref="text" v-html="rawhtml(value)">
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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}
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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);
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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.$refs.text;
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const sel = window.getSelection();
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if (sel.rangeCount > 0) {
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this.selection.start = this.calculateOffset(div, sel.anchorNode, sel.anchorOffset);
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this.selection.end = this.calculateOffset(div, sel.focusNode, sel.focusOffset);
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}
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this.$emit('input', event.target.innerText);
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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 = (node) => {
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if (node === container) {
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found = true;
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return;
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}
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if (node.nodeType === 3) {
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position += node.length;
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} else {
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for (let i = 0; i < node.childNodes.length; i++) {
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walk(node.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(node);
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return position + offset;
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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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const range = document.createRange();
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console.log(this.selection);
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range.setStart(div, Math.min(this.selection.anchorOffset, this.value.length));
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range.setEnd(div, Math.min(this.selection.focusOffset, this.value.length));
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this.selection.removeAllRanges();
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this.selection.addRange(range);
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}
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}
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}
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};
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</script> |