inject.js

// Runs in the PAGE's own JS context (world: "MAIN"), so it can see the
// same `window.monaco` global that LeetCode's editor uses. Content scripts
// normally run in an isolated world and can't see this, so we bridge the
// two worlds with CustomEvents on `window`.

(function () {
  function getMonacoCode() {
    try {
      if (!window.monaco || !window.monaco.editor) return null;
      const models = window.monaco.editor.getModels();
      if (!models || models.length === 0) return null;
      // LeetCode usually keeps a single active model for the code editor.
      const model = models[0];
      return {
        code: model.getValue(),
        language: model.getLanguageId ? model.getLanguageId() : (model._languageId || "unknown"),
      };
    } catch (err) {
      return null;
    }
  }

  window.addEventListener("LC_ANALYZER_REQUEST_CODE", function () {
    const result = getMonacoCode();
    window.dispatchEvent(
      new CustomEvent("LC_ANALYZER_RESPONSE_CODE", { detail: result })
    );
  });
})();