ggdrive_downloadDoc.js

import { UfsGlobal } from "./content-scripts/ufs_global.js";

export default {
  icon: "https://drive-thirdparty.googleusercontent.com/32/type/application/vnd.google-apps.document",
  name: {
    en: "GG Drive - Download Document (to PDF)",
    vi: "GG Drive - Tải Document (sang PDF)",
  },
  description: {
    en: "Download google drive Document file that dont have download button. Pages will be convert to PDF, cannot edit.",
    vi: "Tải file Doc không có nút download trên google drive. Tải về định dạng PDF, không thể sửa nội dung.",
  },

  whiteList: ["https://docs.google.com/document/*"],

  pageScript: {
    onClick: () => {
      UfsGlobal.DOM.injectScriptSrc(
        "https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js",
        async (success, error) => {
          if (!success) {
            alert("Inject FAILED: " + error);
            return;
          }

          const { jsPDF } = window.jspdf || {};
          if (!jsPDF) {
            alert("jspdf not found");
            return;
          }

          const [currentPage, totalPage] =
            document
              .querySelector(".jfk-tooltip-contentId")
              ?.textContent?.split(" / ") ?? [];

          const sleep = (ms = 0) =>
            new Promise((resolve) => setTimeout(resolve, ms));

          // scroll to first page
          const contanier = document.querySelector(
            ".kix-rotatingtilemanager.docs-ui-hit-region-surface"
          );
          contanier?.scrollIntoView?.({ block: "start", behavior: "instant" });

          await sleep(500);

          // get first page
          let canvas = document.querySelector("canvas");
          if (!canvas) {
            alert("Docs page not found");
            return;
          }

          let pdf;
          while (canvas) {
            // scroll current page into view => to load next page
            canvas.scrollIntoView({ block: "start", behavior: "instant" });
            await sleep(500);

            // capture canvas page to pdf
            if (canvas.width && canvas.height) {
              let imgData = canvas.toDataURL("image/jpeg", 1.0);
              if (!pdf) {
                let ori = canvas.width > canvas.height ? "l" : "p";
                pdf = new jsPDF({
                  orientation: ori,
                  unit: "px",
                  format: [canvas.width, canvas.height],
                  hotfixes: ["px_scaling"],
                });
              }
              pdf.addImage(imgData, "JPEG", 0, 0);
            }

            // query next canvas
            let listCanvas = Array.from(document.querySelectorAll("canvas"));
            let nextCanvas = null;
            for (let c of listCanvas) {
              if (
                c != canvas &&
                c.getBoundingClientRect().top >
                  canvas.getBoundingClientRect().top
              ) {
                nextCanvas = c;
                break;
              }
            }
            canvas = nextCanvas;

            // prepare next pdf page
            if (canvas) {
              pdf.addPage([canvas.width, canvas.height]);
            }
          }
          pdf.save((document.title || "download") + ".pdf");
        }
      );
    },
  },
};