Method handleSourceTextInput

src/core/nodeviews/code-block.ts:866–1018

* 处理源码文本输入

()

   * 处理源码文本输入
   */
  private handleSourceTextInput(): void {
    if (!this.sourceTextElement || this.updating) return;

    // 从所有子 div 中收集文本内容
    const lines: string[] = [];
    const childDivs = this.sourceTextElement.querySelectorAll("div.milkup-with-line-number");
    childDivs.forEach((div) => {
      lines.push(div.textContent || "");
    });
    const text = lines.join("\n");

    const pos = this.getPos();
    if (pos === undefined) return;

    // 保存光标位置
    const selection = window.getSelection();
    let cursorOffset = 0;
    if (selection && selection.rangeCount > 0) {
      const range = selection.getRangeAt(0);
      if (range.startContainer.nodeType === Node.TEXT_NODE) {
        cursorOffset = range.startOffset;
        // 计算相对于整个文本的偏移量
        let node: Node | null = range.startContainer;
        while (node && node !== this.sourceTextElement && node.previousSibling) {
          node = node.previousSibling;
          cursorOffset += node.textContent?.length || 0;
        }
      }
    }

    this.updating = true;

    // 检查是否是完整的代码块格式（必须有开头和结尾的 ```）
    const fenceMatch = text.match(/^```([^\n]*?)\n([\s\S]*?)\n```$/);

    if (fenceMatch) {
      // 仍然是完整的代码块格式，更新内容
      const [, language, content] = fenceMatch;
      const tr = this.view.state.tr;
      let needsUpdate = false;

      // 更新语言属性
      const normalizedLang = language || "";
      if (normalizedLang !== this.node.attrs.language) {
        tr.setNodeMarkup(pos, null, {
          ...this.node.attrs,
          language: normalizedLang,
        });
        needsUpdate = true;
      }

      // 更新内容
      if (content !== this.node.textContent) {
        const start = pos + 1;
        const end = pos + 1 + this.node.content.size;
        tr.replaceWith(start, end, content ? this.view.state.schema.text(content) : []);
        needsUpdate = true;
      }