src/addons/addons/bitmap-copy/userscript.js

export default async ({ addon, console }) => {
  if (!addon.tab.redux.state) return console.warn("Redux is not available!");
  addon.tab.redux.initialize();
  addon.tab.redux.addEventListener("statechanged", ({ detail }) => {
    if (addon.self.disabled) return;
    const e = detail;
    if (!e.action || e.action.type !== "scratch-paint/clipboard/SET") return;
    const items = e.next.scratchPaint.clipboard.items;
    if (items.length !== 1) return;
    const firstItem = items[0];
    // TODO vector support
    if (!Array.isArray(firstItem) || firstItem[0] !== "Raster") return console.log("copied element is vector");
    const dataURL = firstItem[1].source;
    addon.tab
      .copyImage(dataURL)
      .then(() => console.log("Image successfully copied"))
      .catch((e) => console.error(`Image could not be copied: ${e}`));
  });
};