test_dragstart.html

mozilla-central/dom/events/test/test_dragstart.html (file symbol)

Enable keyboard shortcuts

Source code

File a bug in Core :: DOM: UI Events & Focus Handling

Revision control

Copy as Markdown

Other Tools

Test Info: Errors

This test failed 22 times in the preceding 30 days. quicksearch this test
Manifest: dom/events/test/mochitest.toml

<html>

<head>

  <title>Tests for the dragstart event</title>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script src="/tests/SimpleTest/EventUtils.js"></script>

<!--

 This test checks the dragstart event and the DataTransfer object

-->

<script>

SimpleTest.waitForExplicitFinish();

var gDragInfo;

var gDataTransfer = null;

var gExtraDragTests = 0;

function runTests()

  // first, create a selection and try dragging it

  var draggable = $("draggable");

  window.getSelection().selectAllChildren(draggable);

  synthesizeMouse(draggable, 6, 6, { type: "mousedown" });

  synthesizeMouse(draggable, 14, 14, { type: "mousemove" });

  // drags are asynchronous on Linux, so this extra event is needed to make

  // sure the drag gets processed

  synthesizeMouse(draggable, 15, 15, { type: "mousemove" });

function afterDragTests()

  // the dragstart should have occurred due to moving the mouse. gDataTransfer

  // caches the dataTransfer that was used, however it should now be empty and

  // be read only.

  ok(gDataTransfer instanceof DataTransfer, "DataTransfer after dragstart event");

  checkTypes(gDataTransfer, [], 0, "after dragstart event");

  expectError(() => gDataTransfer.setData("text/plain", "Some Text"),

              "NoModificationAllowedError", "setData when read only");

  expectError(() => gDataTransfer.clearData("text/plain"),

              "NoModificationAllowedError", "clearData when read only");

  expectError(() => gDataTransfer.addElement(draggable),

              "NoModificationAllowedError", "addElement when read only");

  var evt = document.createEvent("dragevent");

  ok(evt instanceof DragEvent, "synthetic dragevent class")

  ok(evt instanceof MouseEvent, "synthetic event inherits from MouseEvent")

  evt.initDragEvent("dragstart", true, true, window, 1, 40, 35, 20, 15,

                    false, true, false, false, 0, null, null);

  $("synthetic").dispatchEvent(evt);

  var evt = document.createEvent("dragevent");

  ok(evt instanceof DragEvent, "synthetic dragevent class")

  evt.initDragEvent("dragover", true, true, window, 0, 40, 35, 20, 15,

                    true, false, true, true, 2, document.documentElement, null);

  $("synthetic2").dispatchEvent(evt);

  // next, dragging links and images

  sendMouseEventsForDrag("link");

  sendMouseEventsForDrag("image");

//  disable testing input dragging for now, as it doesn't seem to be testable

//  draggable = $("input");

//  draggable.setSelectionRange(0, 4);

//  synthesizeMouse(draggable, 8, 8, { type: "mousedown" });

//  synthesizeMouse(draggable, 15, 15, { type: "mousemove" });

//  sendMouseEventsForDrag("input");

  // draggable elements inside a shadow root

  sendMouseEventsForShadowRootDrag("shadow_host_containing_draggable");

  sendMouseEventsForShadowRootDrag("shadow_host_containing_image");

  // next, check if the draggable attribute can be used to adjust the drag target

  gDragInfo = { target: $("dragtrue"), testid: "draggable true node" };

  sendMouseEventsForDrag("dragtrue");

  gDragInfo = { target: $("dragtrue"), testid: "draggable true child" };

  sendMouseEventsForDrag("spantrue");

  gDragInfo = { target: $("dragfalse").firstChild, testid: "draggable false node" };

  sendMouseEventsForDrag("dragfalse");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  gDragInfo = { target: $("spanfalse").firstChild, testid: "draggable false child" };

  sendMouseEventsForDrag("spanfalse");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  gDragInfo = { target: $("userselectnone").firstChild, testid: "user select none inside draggable false node" };

  sendMouseEventsForDrag("userselectnone");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  gDragInfo = { target: $("draggable_with_undraggable_descendant"), testid: "undraggable inside draggable" };

  sendMouseEventsForDrag("undraggable_inside_draggable");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  sendMouseEventsForDrag("link_to_file");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  sendMouseEventsForDrag("broken_file_image");

  synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  if (navigator.platform.startsWith("Win")) {

    sendMouseEventsForDrag("link_to_windows_file");

    synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

    sendMouseEventsForDrag("broken_windows_file_image");

    synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

    sendMouseEventsForDrag("link_to_backslash_windows_file");

    synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

    sendMouseEventsForDrag("broken_backslash_windows_file_image");

    synthesizeMouse(draggable, 12, 12, { type: "mouseup" });

  if (gExtraDragTests == 7)

    SimpleTest.finish();

function sendMouseEventsForDrag(nodeid)

  info("Sending events for " + nodeid);

  var draggable = $(nodeid);

  synthesizeMouse(draggable, 3, 3, { type: "mousedown" });

  synthesizeMouse(draggable, 10, 10, { type: "mousemove" });

  synthesizeMouse(draggable, 12, 12, { type: "mousemove" });

function sendMouseEventsForShadowRootDrag(host)

  var draggable = $(host).shadowRoot.firstElementChild;

  synthesizeMouse(draggable, 3, 3, { type: "mousedown" });

  synthesizeMouse(draggable, 10, 10, { type: "mousemove" });

  synthesizeMouse(draggable, 12, 12, { type: "mousemove" });

function doDragStartSelection(event)

  is(event.type, "dragstart", "dragstart event type");

  is(event.target, $("draggable").firstChild, "dragstart event target");

  is(event.bubbles, true, "dragstart event bubbles");

  is(event.cancelable, true, "dragstart event cancelable");

  is(event.clientX, 14, "dragstart clientX");

  is(event.clientY, 14, "dragstart clientY");

  ok(event.screenX > 0, "dragstart screenX");

  ok(event.screenY > 0, "dragstart screenY");

  is(event.layerX, 14, "dragstart layerX");

  is(event.layerY, 14, "dragstart layerY");

  is(event.pageX, 14, "dragstart pageX");

  is(event.pageY, 14, "dragstart pageY");

  var dt = event.dataTransfer;

  ok(dt instanceof DataTransfer, "dataTransfer is DataTransfer");

  gDataTransfer = dt;

  var types = dt.types;

  ok(Array.isArray(types), "initial types is an Array");

  checkTypes(dt, ["text/_moz_htmlcontext", "text/_moz_htmlinfo", "text/html", "text/plain"], 0, "initial selection");

  is(dt.getData("text/plain"), "This is a draggable bit of text.", "initial selection text/plain");

  is(dt.getData("text/html"), "<div id=\"draggable\" ondragstart=\"doDragStartSelection(event)\">This is a <em>draggable</em> bit of text.</div>",

     "initial selection text/html");

  // text/plain and Text are available for compatibility. They retrieve the

  // text/plain data. text/unicode is also for compatibility and retreives the plain text.

  is(dt.getData("text/plain"), "This is a draggable bit of text.", "initial selection text/plain");

  is(dt.getData("Text"), "This is a draggable bit of text.", "initial selection Text");

  is(dt.getData("TEXT"), "This is a draggable bit of text.", "initial selection TEXT");

  is(dt.getData("text/PLAIN"), "This is a draggable bit of text.", "initial selection text/PLAIN");

  is(dt.getData("text/unicode"), "This is a draggable bit of text.", "initial selection text/unicode");

  is(SpecialPowers.wrap(dt).mozItemCount, 1, "initial selection item count");

  dt.clearData("text/plain");

  dt.clearData("text/html");

  dt.clearData("text/_moz_htmlinfo");

  dt.clearData("text/_moz_htmlcontext");

  test_DataTransfer(dt);

  setTimeout(afterDragTests, 0);

function test_DataTransfer(dt)

  is(SpecialPowers.wrap(dt).mozItemCount, 0, "empty itemCount");

  var types = dt.types;

  ok(Array.isArray(types), "empty types is an Array");

  // The above test fails if we have SpecialPowers.wrap(dt).types instead of dt.types

  // because dt.types will be wrapped and become a proxy.

  // So wrap with special powers after the test

  dt = SpecialPowers.wrap(dt);

  checkTypes(dt, [], 0, "empty");

  is(dt.getData("text/plain"), "", "empty data is empty");

  // calling setDataAt requires an index that is 0 <= index <= dt.itemCount

  expectError(() => dt.mozSetDataAt("text/plain", "Some Text", 1),

              "IndexSizeError", "setDataAt index too high");

  is(dt.mozUserCancelled, false, "userCancelled");

  // because an exception occurred, the data should not have been added

  is(dt.mozItemCount, 0, "empty setDataAt index too high itemCount");

  dt.getData("text/plain", "", "empty setDataAt index too high getData");

  // if the type is '', do nothing, or return ''

  dt.setData("", "Invalid Type");

  is(dt.types.length, 0, "invalid type setData");

  is(dt.getData(""), "", "invalid type getData");

  dt.mozSetDataAt("", "Invalid Type", 0);

  is(dt.types.length, 0, "invalid type setDataAt");

  is(dt.mozGetDataAt("", 0), null, "invalid type getDataAt");

  // similar with clearDataAt and getDataAt

  expectError(() => dt.mozGetDataAt("text/plain", 1),

              "IndexSizeError", "getDataAt index too high");

  expectError(() => dt.mozClearDataAt("text/plain", 1),

              "IndexSizeError", "clearDataAt index too high");

  dt.setData("text/plain", "Sample Text");

  is(dt.mozItemCount, 1, "added plaintext itemCount");

  checkOneDataItem(dt, ["text/plain"], ["Sample Text"], 0, "added plaintext");

   // after all those exceptions, the data should still be the same

  checkOneDataItem(dt, ["text/plain"], ["Sample Text"], 0, "added plaintext after exception");

  // modifying the data associated with the format should give it the new value

  dt.setData("text/plain", "Modified Text");

  is(dt.mozItemCount, 1, "modified plaintext itemCount");

  checkOneDataItem(dt, ["text/plain"], ["Modified Text"], 0, "modified plaintext");

  dt.setData("text/html", "<strong>Modified Text</strong>");

  is(dt.mozItemCount, 1, "modified html itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                       ["Modified Text", "<strong>Modified Text</strong>"],

                       0, "modified html");

  // modifying data for a type that already exists should adjust it in place,

  // not reinsert it at the beginning

  dt.setData("text/plain", "New Text");

  is(dt.mozItemCount, 1, "modified text again itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                       ["New Text", "<strong>Modified Text</strong>"],

                       0, "modified text again");

  var draggable = $("draggable");

  dt.setData("application/-moz-node", draggable);

  checkOneDataItem(dt, ["text/plain", "text/html", "application/-moz-node"],

                       ["New Text", "<strong>Modified Text</strong>", draggable.toString()],

                       0, "added node");

  dt.clearData(""); // null means clear all

  is(dt.mozItemCount, 0, "itemCount after clearData empty string");

  checkTypes(dt, [], 0, "empty after clearData empty string");

  dt.setData("text/plain", 22);

  dt.setData("text/html", 5.6);

  dt.setData("text/xml", 5.6);

  checkTypes(dt, ["text/plain", "text/html", "text/xml"], ["22", "5.6", ""], 0, "add numeric and empty data");

  dt.clearData(); // no argument means clear all

  is(dt.mozItemCount, 0, "itemCount after clearData no argument");

  checkTypes(dt, [], 0, "empty after clearData no argument");

  // check 'Text' type which should convert into text/plain

  dt.setData("Text", "Sample Text");

  checkOneDataItem(dt, ["text/plain"], ["Sample Text"], 0, "set Text");

  is(dt.getData("Text"), "Sample Text", "getData Text");

  is(dt.mozGetDataAt("Text", 0), "Sample Text", "getDataAt Text");

  dt.setData("text/plain", "More Text");

  checkOneDataItem(dt, ["text/plain"], ["More Text"], 0, "set text/plain after set Text");

  dt.mozClearDataAt("", 0); // null means clear all

  is(dt.mozItemCount, 0, "itemCount after clearDataAt empty string");

  checkTypes(dt, [], 0, "empty after clearDataAt empty string");

  // check text/uri-list type

  dt.setData("text/uri-list", "http://www.mozilla.org");

  checkURL(dt, "http://www.mozilla.org", "http://www.mozilla.org", 0, "set text/uri-list");

  // check URL type which should add text/uri-list data

  dt.setData("URL", "ftp://ftp.example.com");

  checkURL(dt, "ftp://ftp.example.com", "ftp://ftp.example.com", 0, "set URL");

  checkTypes(dt, ["text/uri-list"], ["ftp://ftp.example.com"], "url types");

  // clearing text/uri-list data

  dt.clearData("text/uri-list");

  is(dt.mozItemCount, 0, "itemCount after clear url-list");

  is(dt.getData("text/uri-list"), "", "text/uri-list after clear url-list");

  is(dt.getData("URL"), "", "URL after clear url-list");

  // check text/uri-list parsing

  dt.setData("text/uri-list", "#http://www.mozilla.org\nhttp://www.xulplanet.com\nhttp://www.example.com");

  checkURL(dt, "http://www.xulplanet.com",

           "#http://www.mozilla.org\nhttp://www.xulplanet.com\nhttp://www.example.com",

           0, "uri-list 3 lines");

  dt.setData("text/uri-list", "#http://www.mozilla.org");

  is(dt.getData("URL"), "", "uri-list commented");

  dt.setData("text/uri-list", "#http://www.mozilla.org\n");

  is(dt.getData("URL"), "", "uri-list commented with newline");

  // check that clearing the URL type also clears the text/uri-list type

  dt.clearData("URL");

  is(dt.getData("text/uri-list"), "", "clear URL");

  dt.setData("text/uri-list", "#http://www.mozilla.org\n\n\n\n\n");

  is(dt.getData("URL"), "", "uri-list with blank lines");

  dt.setData("text/uri-list", "");

  is(dt.getData("URL"), "", "empty uri-list");

  dt.setData("text/uri-list", "#http://www.mozilla.org\n#Sample\nhttp://www.xulplanet.com  \r\n");

  is(dt.getData("URL"), "http://www.xulplanet.com", "uri-list mix");

  dt.setData("text/uri-list", "\nhttp://www.mozilla.org");

  is(dt.getData("URL"), "", "empty line to start uri-list");

  dt.setData("text/uri-list", "  http://www.mozilla.org#anchor  ");

  is(dt.getData("URL"), "http://www.mozilla.org#anchor", "uri-list with spaces and hash");

  // ensure that setDataAt works the same way

  dt.mozSetDataAt("text/uri-list", "#http://www.mozilla.org\n#Sample\nhttp://www.xulplanet.com  \r\n", 0);

  checkURL(dt, "http://www.xulplanet.com",

           "#http://www.mozilla.org\n#Sample\nhttp://www.xulplanet.com  \r\n",

           0, "uri-list mix setDataAt");

  // now test adding multiple items to be dragged using the setDataAt method

  dt.clearData();

  dt.mozSetDataAt("text/plain", "First Item", 0);

  dt.mozSetDataAt("text/plain", "Second Item", 1);

  expectError(() => dt.mozSetDataAt("text/plain", "Some Text", 3),

              "IndexSizeError", "setDataAt index too high with two items");

  is(dt.mozItemCount, 2, "setDataAt item itemCount");

  checkOneDataItem(dt, ["text/plain"], ["First Item"], 0, "setDataAt item at index 0");

  checkOneDataItem(dt, ["text/plain"], ["Second Item"], 1, "setDataAt item at index 1");

  dt.mozSetDataAt("text/html", "<em>First Item</em>", 0);

  dt.mozSetDataAt("text/html", "<em>Second Item</em>", 1);

  is(dt.mozItemCount, 2, "setDataAt two types item itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "<em>First Item</em>"], 0, "setDataAt two types item at index 0");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["Second Item", "<em>Second Item</em>"], 1, "setDataAt two types item at index 1");

  dt.mozSetDataAt("text/html", "<em>Changed First Item</em>", 0);

  dt.mozSetDataAt("text/plain", "Changed Second Item", 1);

  is(dt.mozItemCount, 2, "changed with setDataAt item itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "<em>Changed First Item</em>"], 0, "changed with setDataAt item at index 0");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["Changed Second Item", "<em>Second Item</em>"], 1, "changed with setDataAt item at index 1");

  dt.setData("text/html", "Changed with setData");

  is(dt.mozItemCount, 2, "changed with setData");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "Changed with setData"], 0, "changed with setData item at index 0");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["Changed Second Item", "<em>Second Item</em>"], 1, "changed with setData item at index 1");

  dt.mozSetDataAt("application/-moz-node", "draggable", 2);

  is(dt.mozItemCount, 3, "setDataAt node itemCount");

  checkOneDataItem(dt, ["application/-moz-node"], ["draggable"], 2, "setDataAt node item at index 2");

  // Try to add and then remove a non-string type to the DataTransfer and ensure

  // that the type appears in DataTransfer.types.

    dt.mozSetDataAt("application/-x-body", document.body, 0);

    let found = false;

    for (let i = 0; i < dt.types.length; ++i) {

      if (dt.types[i] == "application/-x-body") {

        found = true;

        break;

    ok(found, "Data should appear in datatransfer.types despite having a non-string type");

    dt.mozClearDataAt("application/-x-body", 0);

  dt.mozClearDataAt("text/html", 1);

  is(dt.mozItemCount, 3, "clearDataAt itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "Changed with setData"], 0, "clearDataAt item at index 0");

  checkOneDataItem(dt, ["text/plain"], ["Changed Second Item"], 1, "clearDataAt item at index 1");

  dt.mozClearDataAt("text/plain", 1);

  is(dt.mozItemCount, 2, "clearDataAt last type itemCount");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "Changed with setData"], 0, "clearDataAt last type at index 0");

  checkOneDataItem(dt, ["application/-moz-node"], ["draggable"], 1, "clearDataAt last type item at index 2");

  expectError(() => dt.mozGetDataAt("text/plain", 2),

              "IndexSizeError", "getDataAt after item removed index too high");

  dt.mozSetDataAt("text/unknown", "Unknown type", 2);

  dt.mozSetDataAt("text/unknown", "Unknown type", 1);

  is(dt.mozItemCount, 3, "add unknown type");

  checkOneDataItem(dt, ["application/-moz-node", "text/unknown"],

                   ["draggable", "Unknown type"], 1, "add unknown type item at index 1");

  checkOneDataItem(dt, ["text/unknown"], ["Unknown type"], 2, "add unknown type item at index 2");

  dt.mozClearDataAt("", 1);

  is(dt.mozItemCount, 2, "clearDataAt empty string");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "Changed with setData"], 0, "clearDataAt empty string item at index 0");

  checkOneDataItem(dt, ["text/unknown"],

                   ["Unknown type"], 1, "clearDataAt empty string item at index 1");

  // passing a format that doesn't exist to clearData or clearDataAt should just

  // do nothing

  dt.clearData("text/something");

  dt.mozClearDataAt("text/something", 1);

  is(dt.mozItemCount, 2, "clearData type that does not exist");

  checkOneDataItem(dt, ["text/plain", "text/html"],

                   ["First Item", "Changed with setData"], 0, "clearData type that does not exist item at index 0");

  checkOneDataItem(dt, ["text/unknown"],

                   ["Unknown type"], 1, "clearData type that does not exist item at index 1");

  expectError(() => dt.mozClearDataAt("text/plain", 3),

              "IndexSizeError", "clearData index too high with two items");

  // ensure that clearData() removes all data associated with the first item, but doesn't

  // shift the second item down into the first item's slot.

  dt.clearData();

  is(dt.mozItemCount, 2, "clearData no argument with multiple items itemCount");

  checkOneDataItem(dt, [], [], 0,

                   "clearData no argument with multiple items item at index 0");

  checkOneDataItem(dt, ["text/unknown"],

                   ["Unknown type"], 1, "clearData no argument with multiple items item at index 1");

  // remove tha remaining data in index 1. As index 0 is empty at this point, this will actually

  // drop mozItemCount to 0. (XXX: This is because of spec-compliance reasons related

  // to the more-recent dt.item API. It's an unfortunate, but hopefully rare edge case)

  dt.mozClearDataAt("", 1);

  is(dt.mozItemCount, 0, "all data cleared");

  // now check the effectAllowed and dropEffect properties

  is(dt.dropEffect, "none", "initial dropEffect");

  is(dt.effectAllowed, "uninitialized", "initial effectAllowed");

  ["copy", "none", "link", "", "other", "copyMove", "all", "uninitialized", "move"].forEach(

    function (i) {

      dt.dropEffect = i;

      is(dt.dropEffect, i == "" || i == "other" || i == "copyMove" ||

                        i == "all" || i == "uninitialized" ? "link" : i,

         "dropEffect set to " + i);

      is(dt.effectAllowed, "uninitialized", "effectAllowed not modified by dropEffect set to " + i);

);

  ["move", "copy", "link", "", "other", "moveCopy", "copyMove",

   "linkMove", "copyLink", "all", "uninitialized", "none"].forEach(

    function (i) {

      dt.effectAllowed = i;

      is(dt.dropEffect, "move", "dropEffect not modified by effectAllowed set to " + i);

      is(dt.effectAllowed, i == "" || i == "other" || i == "moveCopy" ? "link" : i,

         "effectAllowed set to " + i);

);

function doDragStartLink(event)

  var dt = event.dataTransfer;

  checkTypes(dt, ["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"], 0, "initial link");

  is(SpecialPowers.wrap(dt).mozItemCount, 1, "initial link item count");

  is(dt.getData("text/uri-list"), "http://www.mozilla.org/", "link text/uri-list");

  is(dt.getData("text/plain"), "http://www.mozilla.org/", "link text/plain");

  event.preventDefault();

  gExtraDragTests++;

function doDragStartImage(event)

  var dataurl = $("image").src;

  var dt = event.dataTransfer;

  checkTypes(dt, ["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"], 0, "initial image");

  is(SpecialPowers.wrap(dt).mozItemCount, 1, "initial image item count");

  is(dt.getData("text/uri-list"), dataurl, "image text/uri-list");

  is(dt.getData("text/plain"), dataurl, "image text/plain");

  event.preventDefault();

  gExtraDragTests++;

function doDragStartInput(event)

  var dt = event.dataTransfer;

  checkTypes(dt, ["text/plain"], 0, "initial input");

  is(SpecialPowers.wrap(dt).mozItemCount, 1, "initial input item count");

//  is(dt.getData("text/plain"), "Text", "input text/plain");

//  event.preventDefault();

function doDragStartInShadowRoot(event)

  is(event.type, "dragstart", "shadow root dragstart event type");

  is(event.target, $("shadow_host_containing_draggable"), "shadow root dragstart event target");

  is(event.bubbles, true, "shadow root dragstart event bubbles");

  is(event.cancelable, true, "shadow root dragstart event cancelable");

  event.preventDefault();

  gExtraDragTests++;

function doDragStartShadowRootImage(event)

  var dt = event.dataTransfer;

  checkTypes(dt, ["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"], 0, "shadow root link with image");

  is(dt.getData("text/uri-list"), "http://example.org/", "shadow root link text/uri-list");

  is(dt.getData("text/plain"), "http://example.org/", "shadow root link text/plain");

  event.preventDefault();

  gExtraDragTests++;

function doDragStartSynthetic(event)

  is(event.type, "dragstart", "synthetic dragstart event type");

  var dt = event.dataTransfer;

  todo(dt instanceof DataTransfer, "synthetic dragstart dataTransfer is DataTransfer");

//  Uncomment next line once the todo instanceof above is fixed.

//  checkTypes(dt, [], 0, "synthetic dragstart");

  is(event.detail, 1, "synthetic dragstart detail");

  is(event.screenX, 40, "synthetic dragstart screenX");

  is(event.screenY, 35, "synthetic dragstart screenY");

  is(event.clientX, 20, "synthetic dragstart clientX");

  is(event.clientY, 15, "synthetic dragstart clientY");

  is(event.ctrlKey, false, "synthetic dragstart ctrlKey");

  is(event.altKey, true, "synthetic dragstart altKey");

  is(event.shiftKey, false, "synthetic dragstart shiftKey");

  is(event.metaKey, false, "synthetic dragstart metaKey");

  is(event.button, 0, "synthetic dragstart button ");

  is(event.relatedTarget, null, "synthetic dragstart relatedTarget");

//  Uncomment next two lines once the todo instanceof above is fixed.

//  dt.setData("text/plain", "Text");

//  is(dt.getData("text/plain"), "Text", "synthetic dragstart data is set after adding");

function doDragOverSynthetic(event)

  is(event.type, "dragover", "synthetic dragover event type");

  var dt = event.dataTransfer;

  todo(dt instanceof DataTransfer, "synthetic dragover dataTransfer is DataTransfer");

//  Uncomment next line once the todo instanceof above is fixed.

// checkTypes(dt, [], 0, "synthetic dragover");

  is(event.detail, 0, "synthetic dragover detail");

  is(event.screenX, 40, "synthetic dragover screenX");

  is(event.screenY, 35, "synthetic dragover screenY");

  is(event.clientX, 20, "synthetic dragover clientX");

  is(event.clientY, 15, "synthetic dragover clientY");

  is(event.ctrlKey, true, "synthetic dragover ctrlKey");

  is(event.altKey, false, "synthetic dragover altKey");

  is(event.shiftKey, true, "synthetic dragover shiftKey");

  is(event.metaKey, true, "synthetic dragover metaKey");

  is(event.button, 2, "synthetic dragover button");

  is(event.relatedTarget, document.documentElement, "synthetic dragover relatedTarget");

//  Uncomment next two lines once the todo instanceof above is fixed.

//  dt.setData("text/plain", "Text");

//  is(dt.getData("text/plain"), "Text", "synthetic dragover data is set after adding");

function onDragStartDraggable(event)

  var dt = event.dataTransfer;

  ok(SpecialPowers.wrap(dt).mozItemCount == 0 && !dt.types.length && event.originalTarget == gDragInfo.target, gDragInfo.testid);

  event.preventDefault();

  gExtraDragTests++;

// Expects dt wrapped in SpecialPowers

function checkOneDataItem(dt, expectedtypes, expecteddata, index, testid)

  checkTypes(dt, expectedtypes, index, testid);

  for (var f = 0; f < expectedtypes.length; f++) {

    if (index == 0)

      is(dt.getData(expectedtypes[f]), expecteddata[f], testid + " getData " + expectedtypes[f]);

    is(dt.mozGetDataAt(expectedtypes[f], index), expecteddata[f] ? expecteddata[f] : null,

       testid + " getDataAt " + expectedtypes[f]);

function checkTypes(dt, expectedtypes, index, testid)

  if (index == 0) {

    var types = dt.types;

    is(types.length, expectedtypes.length, testid + " types length");

    for (var f = 0; f < expectedtypes.length; f++) {

      is(types[f], expectedtypes[f], testid + " " + types[f] + " check");

  types = SpecialPowers.wrap(dt).mozTypesAt(index);

  is(types.length, expectedtypes.length, testid + " typesAt length");

  for (var f = 0; f < expectedtypes.length; f++) {

    is(types[f], expectedtypes[f], testid + " " + types[f] + " at " + index + " check");

// Expects dt wrapped in SpecialPowers

function checkURL(dt, url, fullurllist, index, testid)

  is(dt.getData("text/uri-list"), fullurllist, testid + " text/uri-list");

  is(dt.getData("URL"), url, testid + " URL");

  is(dt.mozGetDataAt("text/uri-list", 0), fullurllist, testid + " text/uri-list");

  is(dt.mozGetDataAt("URL", 0), fullurllist, testid + " URL");

function onDragOverDraggableFalse(event) {

  ok(false, "Triggered dragstart on draggable=false node " + event.target.id);

function onDragStartUnlinkable(event) {

  ok(false, "Triggered dragstart on undraggable node " + event.target.id);

function expectError(fn, eid, testid)

  var error = "";

  try {

    fn();

  } catch (ex) {

    error = ex.name;

  is(error, eid, testid + " causes exception " + eid);

</script>

</head>

<body style="height: 300px; overflow: auto;" onload="setTimeout(runTests, 0)">

<div id="draggable" ondragstart="doDragStartSelection(event)">This is a <em>draggable</em> bit of text.</div>

<fieldset>

<a id="link" href="http://www.mozilla.org/" ondragstart="doDragStartLink(event)">mozilla.org</a>

</fieldset>

<label>

<img id="image" src="data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%18%00%00%00%18%02%03%00%00%00%9D%19%D5k%00%00%00%04gAMA%00%00%B1%8F%0B%FCa%05%00%00%00%0CPLTE%FF%FF%FF%FF%FF%FF%F7%DC%13%00%00%00%03%80%01X%00%00%00%01tRNS%08N%3DPT%00%00%00%01bKGD%00%88%05%1DH%00%00%00%09pHYs%00%00%0B%11%00%00%0B%11%01%7Fd_%91%00%00%00%07tIME%07%D2%05%0C%14%0C%0D%D8%3F%1FQ%00%00%00%5CIDATx%9C%7D%8E%CB%09%C0%20%10D%07r%B7%20%2F%E9wV0%15h%EA%D9%12D4%BB%C1x%CC%5C%1E%0C%CC%07%C0%9C0%9Dd7()%C0A%D3%8D%E0%B8%10%1DiCHM%D0%AC%D2d%C3M%F1%B4%E7%FF%10%0BY%AC%25%93%CD%CBF%B5%B2%C0%3Alh%CD%AE%13%DF%A5%F7%E0%03byW%09A%B4%F3%E2%00%00%00%00IEND%AEB%60%82"

     ondragstart="doDragStartImage(event)">

</label>

<input id="input" value="Text in a box" ondragstart="doDragStartInput(event)">

<div ondragstart="onDragStartDraggable(event)">

  <div id="dragtrue" draggable="true">

    This is a <span id="spantrue">draggable</span> area.

  </div>

  <div id="dragfalse" draggable="false">

    This is a <span id="spanfalse">non-draggable</span> area.

  </div>

</div>

<!--iframe src="http://www.mozilla.org" width="400" height="400"></iframe-->

<div id="synthetic" ondragstart="doDragStartSynthetic(event)">Synthetic Event Dispatch</div>

<div id="synthetic2" ondragover="doDragOverSynthetic(event)">Synthetic Event Dispatch</div>

<div draggable="true" id="shadow_host_containing_draggable"></div>

<script>

shadow_host_containing_draggable.attachShadow({ mode: 'open' }).innerHTML =

`<span>Inside shadow root</span>`;

shadow_host_containing_draggable.addEventListener("dragstart", doDragStartInShadowRoot);

</script>

<a href="http://example.org" ondragstart="doDragStartShadowRootImage(event)">

  <div id="shadow_host_containing_image"></div>

</a>

<script>

shadow_host_containing_image.attachShadow({ mode: 'open' }).innerHTML =

`<img src="${$("image").src}" alt="Alt Text"></img>`;

</script>

<a href="http://example.org" id="link_user_select_none_child" draggable="false" ondragstart="onDragOverDraggableFalse(event)">

  <span id="userselectnone" style="user-select: none">

    This is an unselectable, undraggable area.

  </span>

</a>

<div id="draggable_with_undraggable_descendant" draggable="true" ondragstart="onDragStartDraggable(event)">

  <a id="undraggable_inside_draggable" href="http://example.org" draggable="false" ondragstart="onDragOverDraggableFalse(event)">

    This is an undraggable link inside a draggable ancestor.

  </a>

</div>

<a id="link_to_file" href="file:///" ondragstart="onDragStartUnlinkable(event)">This is an undraggable 'file' link</a>

<a id="link_to_windows_file" href="c:/Users/" ondragstart="onDragStartUnlinkable(event)">This is an undraggable 'file' link</a>

<a id="link_to_backslash_windows_file" href="c:\\Users\\" ondragstart="onDragStartUnlinkable(event)">This is an undraggable 'file' link</a>

<img id="broken_file_image" src="file:///" ondragstart="onDragStartUnlinkable(event)">

<img id="broken_windows_file_image" src="c:/Users/" ondragstart="onDragStartUnlinkable(event)">

<img id="broken_backslash_windows_file_image" src="c:\\Users\\" ondragstart="onDragStartUnlinkable(event)">

</body>

</html>