132 lines
2.9 KiB
Vue
132 lines
2.9 KiB
Vue
<script lang="ts" setup>
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import { javascript } from '@codemirror/lang-javascript';
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import { yaml } from '@codemirror/lang-yaml';
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import { oneDark } from '@codemirror/theme-one-dark';
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import { MergeView } from '@codemirror/merge';
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import { EditorView, basicSetup } from 'codemirror';
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import { EditorState } from '@codemirror/state';
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import { ref, onMounted, onBeforeUnmount, watch } from 'vue';
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const emit = defineEmits(['update:newArea', 'change']);
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const props = defineProps({
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oldArea: {
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type: String,
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default: '原始内容',
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},
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/**当前变更内容 */
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newArea: {
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type: String,
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default: '当前内容',
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},
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/**编辑框高度 */
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height: {
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type: String,
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default: '400px',
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},
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/**缩进2空格 */
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tabSize: {
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type: Number,
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default: 2,
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},
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/**是否禁止输入 */
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disabled: {
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type: Boolean,
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default: true,
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},
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/**高亮语言 */
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lang: {
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type: String,
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default: 'javascript',
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},
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});
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/**视图容器 */
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const viewContainerDom = ref<HTMLElement | undefined>(undefined);
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let viewContainer: MergeView | null = null;
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/**高亮语言拓展 */
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function fnLangExtension() {
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if (props.lang === 'yaml') {
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return yaml();
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}
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return javascript();
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}
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/**初始化渲染视图 */
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function handleRanderView(container: HTMLElement | undefined) {
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if (!container) return;
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viewContainer = new MergeView({
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a: {
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doc: props.oldArea,
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extensions: [
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fnLangExtension(),
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oneDark,
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basicSetup,
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EditorView.editable.of(false),
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EditorState.readOnly.of(true),
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],
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},
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b: {
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doc: props.newArea,
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extensions: [
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fnLangExtension(),
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oneDark,
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basicSetup,
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EditorView.editable.of(!props.disabled),
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EditorState.readOnly.of(props.disabled),
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EditorState.tabSize.of(props.tabSize),
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EditorView.updateListener.of(v => {
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if (v.docChanged) {
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const docStr = v.state.doc.toString();
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emit('change', docStr, v.state.doc);
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// 禁用时不双向绑定，防止监听重复变化数值
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if (!props.disabled) {
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emit('update:newArea', docStr);
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}
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}
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}),
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],
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},
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parent: container,
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});
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}
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/**监听是否value改变 */
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watch(
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() => props.newArea,
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val => {
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// 禁用时无输入靠外部值变化改变数值
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if (props.disabled && viewContainer) {
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const docLine = viewContainer.b.state.doc.length;
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viewContainer.b.dispatch({
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changes: { from: 0, to: docLine, insert: val },
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});
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}
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}
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);
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onMounted(() => {
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handleRanderView(viewContainerDom.value);
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});
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onBeforeUnmount(() => {
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viewContainer?.destroy();
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});
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</script>
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<template>
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<div
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ref="viewContainerDom"
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class="container"
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:style="{ '--editor-height': height }"
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></div>
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</template>
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<style lang="less" scoped>
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.container {
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--editor-height: 400px;
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}
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.container :deep(.cm-editor) {
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height: var(--editor-height);
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}
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</style>
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