在移动应用开发领域,代码编辑器一直是开发者们不可或缺的工具。随着鸿蒙系统(HarmonyOS)的崛起,为其量身打造一款流畅、高效的代码编辑器变得尤为重要。本文将深入探讨如何使用UniApp框架开发一个专业级的代码编辑器,并重点关注鸿蒙系统的适配与优化。
在开始开发之前,我们需要慎重考虑技术栈的选择。经过实践,我们选择了以下核心技术:
首先,让我们配置必要的项目依赖:
// package.json
{
"dependencies": {
"monaco-editor": "^0.45.0",
"prismjs": "^1.29.0",
"@types/prismjs": "^1.26.3",
"prettier": "^3.1.0",
"localforage": "^1.10.0"
}
}
首先,我们需要创建一个编辑器状态管理类来处理编辑器的核心状态:
// utils/EditorState.ts
export class EditorState {
private static instance: EditorState;
private currentFile: string | null = null;
private isModified: boolean = false;
private history: string[] = [];
private historyIndex: number = -1;
private constructor() {
// 单例模式
}
static getInstance(): EditorState {
if (!EditorState.instance) {
EditorState.instance = new EditorState();
}
return EditorState.instance;
}
setCurrentFile(filename: string): void {
this.currentFile = filename;
this.isModified = false;
this.history = [];
this.historyIndex = -1;
}
markAsModified(): void {
this.isModified = true;
}
addToHistory(content: string): void {
this.history = this.history.slice(0, this.historyIndex + 1);
this.history.push(content);
this.historyIndex++;
// 限制历史记录大小
if (this.history.length > 50) {
this.history.shift();
this.historyIndex--;
}
}
undo(): string | null {
if (this.historyIndex > 0) {
this.historyIndex--;
return this.history[this.historyIndex];
}
return null;
}
redo(): string | null {
if (this.historyIndex < this.history.length - 1) {
this.historyIndex++;
return this.history[this.historyIndex];
}
return null;
}
}
创建主编辑器组件,实现核心编辑功能:
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为了提供更好的代码编辑体验,我们需要实现实时语法高亮:
// utils/SyntaxHighlighter.ts
import * as Prism from 'prismjs';
export class SyntaxHighlighter {
private worker: Worker | null = null;
private highlightQueue: Array<{
code: string;
language: string;
resolve: (value: string) => void;
}> = [];
private isProcessing: boolean = false;
constructor() {
this.initializeWorker();
}
private initializeWorker(): void {
// 鸿蒙平台特殊处理
if (uni.getSystemInfoSync().platform === 'harmony') {
const workerModule = uni.requireNativePlugin('worker');
this.worker = workerModule.createWorker('highlighter.js');
} else {
this.worker = new Worker('/workers/highlighter.js');
}
this.worker.onmessage = (event) => {
const { highlightedCode } = event.data;
if (this.highlightQueue.length > 0) {
const current = this.highlightQueue.shift();
current?.resolve(highlightedCode);
}
this.processNextInQueue();
};
}
private processNextInQueue(): void {
if (this.highlightQueue.length === 0) {
this.isProcessing = false;
return;
}
this.isProcessing = true;
const next = this.highlightQueue[0];
this.worker?.postMessage({
code: next.code,
language: next.language
});
}
highlight(code: string, language: string): Promise<string> {
return new Promise((resolve) => {
// 添加到队列
this.highlightQueue.push({ code, language, resolve });
// 如果没有正在处理的任务,开始处理
if (!this.isProcessing) {
this.processNextInQueue();
}
});
}
dispose(): void {
this.worker?.terminate();
this.worker = null;
this.highlightQueue = [];
this.isProcessing = false;
}
}
实现代码格式化功能:
// utils/CodeFormatter.ts
import prettier from 'prettier';
import parserBabel from 'prettier/parser-babel';
import parserTypescript from 'prettier/parser-typescript';
import parserHtml from 'prettier/parser-html';
import parserCss from 'prettier/parser-postcss';
export async function formatCode(code: string, language: string): Promise<string> {
const options = {
parser: getParserForLanguage(language),
plugins: [parserBabel, parserTypescript, parserHtml, parserCss],
semi: true,
singleQuote: true,
tabWidth: 2,
printWidth: 80,
trailingComma: 'es5'
};
try {
return await prettier.format(code, options);
} catch (error) {
console.error('格式化失败:', error);
throw error;
}
}
function getParserForLanguage(language: string): string {
switch (language.toLowerCase()) {
case 'javascript':
case 'js':
return 'babel';
case 'typescript':
case 'ts':
return 'typescript';
case 'html':
case 'vue':
return 'html';
case 'css':
case 'scss':
case 'less':
return 'css';
default:
return 'babel';
}
}
在鸿蒙系统上运行代码编辑器需要特别注意以下几点:
// utils/HarmonyOptimizer.ts
export class HarmonyOptimizer {
static setupPerformanceMonitor(): void {
if (uni.getSystemInfoSync().platform === 'harmony') {
const performance = uni.requireNativePlugin('performance');
// 监控内存使用
performance.startMonitoring({
type: 'memory',
callback: (data: any) => {
if (data.usedMemory > data.totalMemory * 0.8) {
this.performGC();
}
}
});
}
}
static performGC(): void {
// 触发垃圾回收
if (uni.getSystemInfoSync().platform === 'harmony') {
const system = uni.requireNativePlugin('system');
system.gc();
}
}
static optimizeRendering(): void {
if (uni.getSystemInfoSync().platform === 'harmony') {
// 使用鸿蒙原生渲染引擎
const render = uni.requireNativePlugin('render');
render.setRenderMode({
mode: 'hardware' // 启用硬件加速
});
}
}
}
// utils/InputMethodManager.ts
export class InputMethodManager {
static adjustInputMethod(): void {
if (uni.getSystemInfoSync().platform === 'harmony') {
const input = uni.requireNativePlugin('input');
// 设置输入法模式
input.setInputMode({
type: 'text',
returnKeyType: 'done',
options: {
autoCapitalize: false,
autoCorrect: false
}
});
}
}
static handleKeyboardHeight(callback: (height: number) => void): void {
uni.onKeyboardHeightChange((res) => {
callback(res.height);
});
}
}
下面是一个完整的代码编辑器页面示例:
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通过本文的实践,我们实现了一个功能完整的代码编辑器,并针对鸿蒙系统进行了深度优化。主要特点包括:
未来的优化方向:
随着鸿蒙生态的不断发展,相信会有更多优秀的开发工具在这个平台上涌现。我们也将持续关注新特性的支持情况,不断优化和改进我们的代码编辑器。