File: draggable_contenteditable.html

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<!doctype html>
<html>
  <head>
    <title>Draggable contenteditable element</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="/resources/testdriver.js"></script>
    <script src="/resources/testdriver-vendor.js"></script>
    <script src="/resources/testdriver-actions.js"></script>
    <style type="text/css">
#inner { border: 1px solid orange; border-top-width: 20px; }
    </style>
  </head>
  <body>

    <p>Press your mouse button down on the orange block and drag downwards. It should <strong>not</strong> drag the text or the orange block. Use your mouse to select the dummy text. It should <strong>not</strong> drag the text or the orange block.</p>
    <div id="element">
      <div draggable="true" contenteditable="true" id="inner">Dummy text</div>
    </div>

    <script>
    const element = document.getElementById("element");
    const inner = document.getElementById("inner");

    promise_test(t => {
      return new Promise((resolve, reject) => {
        let didReceiveDragStart = false;

        const dragStartListener = ev => {
          ev.preventDefault();
          didReceiveDragStart = true;
        };
        element.addEventListener("dragstart", dragStartListener, { once: true });
        t.add_cleanup(() => element.removeEventListener("dragstart", dragStartListener));

        element.addEventListener("mouseup", () => {
          resolve(didReceiveDragStart);
        }, { once: true });

        const centerH = inner.getBoundingClientRect().height / 2;
        new test_driver.Actions()
          // Move pointer to the center of the top-border.
          .pointerMove(0, 10 - centerH, { origin: inner })
          .pointerDown()
          // Move pointer to the center of the contenteditable element.
          .pointerMove(0, 0, { origin: inner })
          .pointerUp()
          .send();
      }).then(didReceiveDragStart => {
        assert_false(didReceiveDragStart, "dragstart should not fire");
      });
    }, "Draggable contenteditable element should not be draggable from border");

    promise_test(t => {
      return new Promise((resolve, reject) => {
        let didReceiveDragStart = false;

        const dragStartListener = ev => {
          ev.preventDefault();
          didReceiveDragStart = true;
        };
        element.addEventListener("dragstart", dragStartListener, { once: true });
        t.add_cleanup(() => element.removeEventListener("dragstart", dragStartListener));

        element.addEventListener("mouseup", () => {
          resolve(didReceiveDragStart);
        }, { once: true });

        const centerW = inner.getBoundingClientRect().width / 2;
        new test_driver.Actions()
          // Move pointer to the start of the text.
          .pointerMove(5 - centerW, 10, { origin: inner })
          .pointerDown()
          // Move pointer to the center of the contenteditable body.
          .pointerMove(0, 10, { origin: inner })
          .pointerUp()
          .send();
      }).then(didReceiveDragStart => {
        assert_false(didReceiveDragStart, "dragstart should not fire");
      });
    }, "Draggable contenteditable element should not be draggable while selecting text");
    </script>

  </body>
</html>