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products/Sources/formale Sprachen/C/Firefox/dom/events/test/ (Firefox Browser Version 153.0.1^©) Datei vom 27.6.2026 mit Größe 3 kB

Quelle test_drag_image_file.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/events/test/test_drag_image_file.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Test that dragging an image produces a File</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>

<img id="green-png" src="green.png">
<img id="blob-img" alt="Blob image">

<script>
async function synthesizeDragAndCheck(aImgId, aImageAsFile) {
  const img = document.getElementById(aImgId);
  const dt = await synthesizePlainDragAndCancel({
      srcElement: img,
      finalY: 20,
  }, null);

  info(`DataTransfer number of types: ${dt.types.length}`);
  for (let type of dt.types) {
    info(`  getData(${type}) = ${dt.getData(type)}`)
  }

  // Test common types.
  [
    "text/x-moz-url",
    "text/x-moz-url-data",
    "text/x-moz-url-desc",
    "text/uri-list",
    "text/_moz_htmlcontext",
    "text/_moz_htmlinfo",
    "text/html",
    "text/plain",
    "application/x-moz-file-promise",
    "application/x-moz-file-promise-url",
    "application/x-moz-file-promise-dest-filename",
  ].forEach(type => {
    ok(dt.types.includes(type), `types should contains '${type}'`);
  });

  if (aImageAsFile) {
    ok(dt.types.includes("Files"), "types should contains 'Files'");
    is(dt.files.length, 1, "files contains one File");

    let fileItem = null;
    for (let item of dt.items) {
      if (item.kind === "file") {
        fileItem = item;
        break;
      }
    }

    is(fileItem.kind, "file", "Is a file");
    is(fileItem.type, "image/png", "Is a PNG file");

    let file = fileItem.getAsFile();
    is(file.name, "image.png", "Has generic image name")
    ok(file.size > 100, "Is not empty");
  } else {
    ok(dt.types.includes("application/x-moz-nativeimage"), "types should contains 'application/x-moz-nativeimage'");
  }
}

add_setup(async function init() {
  // Wait for page full loaded.
  await SimpleTest.promiseFocus();
});

[true, false].forEach((pref) => {
  add_task(async function test_drag_standard_image() {
    info(`test with dom.events.dataTransfer.imageAsFile.enabled=${pref}`);
    await SpecialPowers.pushPrefEnv({
      set: [["dom.events.dataTransfer.imageAsFile.enabled", pref]],
    });

    await synthesizeDragAndCheck("green-png", pref);
  });

  add_task(async function test_drag_blob_image() {
    info(`test with dom.events.dataTransfer.imageAsFile.enabled=${pref}`);
    await SpecialPowers.pushPrefEnv({
      set: [["dom.events.dataTransfer.imageAsFile.enabled", pref]],
    });

    // Setup blob image.
    const response = await fetch("green.png");
    ok(response.ok, "Fetched green.png for blob");

    const blob = await response.blob();
    is(blob.type, "image/png", "Fetched blob has correct MIME type");

    const blobURL = URL.createObjectURL(blob);
    const blobImg = document.getElementById("blob-img");
    const loadPromise = new Promise(resolve => {
      blobImg.onload = () => {
        requestAnimationFrame(() => requestAnimationFrame(resolve));
      };
    });
    blobImg.src = blobURL;
    await loadPromise;

    // Start drag test.
    await synthesizeDragAndCheck("blob-img", pref);
  });
});
</script>
</body>
</html>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet am 2026-08-25) ¤

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