Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 890 insertions, 0 deletions

diff --git a/accessible/tests/browser/hittest/browser.ini b/accessible/tests/browser/hittest/browser.ini
new file mode 100644
index 0000000000..ae87ecb430
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser.ini
@@ -0,0 +1,18 @@
+[DEFAULT]
+subsuite = a11y
+support-files =
+  head.js
+  !/accessible/tests/browser/shared-head.js
+  !/accessible/tests/browser/*.jsm
+  !/accessible/tests/mochitest/*.js
+  !/accessible/tests/mochitest/letters.gif
+prefs =
+  javascript.options.asyncstack_capture_debuggee_only=false
+
+[browser_test_browser.js]
+[browser_test_general.js]
+[browser_test_scroll_hittest.js]
+[browser_test_shadowroot.js]
+[browser_test_text.js]
+[browser_test_zoom.js]
+[browser_test_zoom_text.js]
diff --git a/accessible/tests/browser/hittest/browser_test_browser.js b/accessible/tests/browser/hittest/browser_test_browser.js
new file mode 100644
index 0000000000..477af42fe9
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_browser.js
@@ -0,0 +1,68 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+async function runTests(browser, accDoc) {
+  // Hit testing. See bug #726097
+  await invokeContentTask(browser, [], () =>
+    content.document.getElementById("hittest").scrollIntoView(true)
+  );
+
+  const dpr = await getContentDPR(browser);
+  const hititem = findAccessibleChildByID(accDoc, "hititem");
+  const hittest = findAccessibleChildByID(accDoc, "hittest");
+  const outerDocAcc = accDoc.parent;
+  const rootAcc = CommonUtils.getRootAccessible(document);
+
+  const [hitX, hitY, hitWidth, hitHeight] = Layout.getBounds(hititem, dpr);
+  // "hititem" node has the full screen width, so when we divide it by 2, we are
+  // still way outside the inline content.
+  const tgtX = hitX + hitWidth / 2;
+  const tgtY = hitY + hitHeight / 2;
+
+  let hitAcc = rootAcc.getDeepestChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hititem,
+    `Hit match at ${tgtX},${tgtY} (root doc deepest child). Found: ${prettyName(
+      hitAcc
+    )}`
+  );
+
+  const hitAcc2 = accDoc.getDeepestChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hitAcc2,
+    `Hit match at ${tgtX},${tgtY} (doc deepest child). Found: ${prettyName(
+      hitAcc2
+    )}`
+  );
+
+  hitAcc = outerDocAcc.getChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    accDoc,
+    `Hit match at ${tgtX},${tgtY} (outer doc child). Found: ${prettyName(
+      hitAcc
+    )}`
+  );
+
+  hitAcc = accDoc.getChildAtPoint(tgtX, tgtY);
+  is(
+    hitAcc,
+    hittest,
+    `Hit match at ${tgtX},${tgtY} (doc child). Found: ${prettyName(hitAcc)}`
+  );
+}
+
+addAccessibleTask(
+  `
+  <div id="hittest">
+    <div id="hititem"><span role="img">img</span>item</div>
+  </div>
+ `,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_general.js b/accessible/tests/browser/hittest/browser_test_general.js
new file mode 100644
index 0000000000..f8f7f26d06
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_general.js
@@ -0,0 +1,339 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+async function runTests(browser, accDoc) {
+  await waitForImageMap(browser, accDoc);
+  const dpr = await getContentDPR(browser);
+
+  await testChildAtPoint(
+    dpr,
+    3,
+    3,
+    findAccessibleChildByID(accDoc, "list"),
+    findAccessibleChildByID(accDoc, "listitem"),
+    findAccessibleChildByID(accDoc, "inner").firstChild
+  );
+  todo(
+    false,
+    "Bug 746974 - children must match on all platforms. On Windows, " +
+      "ChildAtPoint with eDeepestChild is incorrectly ignoring MustPrune " +
+      "for the graphic."
+  );
+
+  const txt = findAccessibleChildByID(accDoc, "txt");
+  await testChildAtPoint(dpr, 1, 1, txt, txt, txt);
+
+  info(
+    "::MustPrune case, point is outside of textbox accessible but is in document."
+  );
+  await testChildAtPoint(dpr, -1, -1, txt, null, null);
+
+  info("::MustPrune case, point is outside of root accessible.");
+  await testChildAtPoint(dpr, -10000, -10000, txt, null, null);
+
+  info("Not specific case, point is inside of btn accessible.");
+  const btn = findAccessibleChildByID(accDoc, "btn");
+  await testChildAtPoint(dpr, 1, 1, btn, btn, btn);
+
+  info("Not specific case, point is outside of btn accessible.");
+  await testChildAtPoint(dpr, -1, -1, btn, null, null);
+
+  info(
+    "Out of flow accessible testing, do not return out of flow accessible " +
+      "because it's not a child of the accessible even though visually it is."
+  );
+  await invokeContentTask(browser, [], () => {
+    const { CommonUtils } = ChromeUtils.importESModule(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Common.sys.mjs"
+    );
+    const doc = content.document;
+    const rectArea = CommonUtils.getNode("area", doc).getBoundingClientRect();
+    const outOfFlow = CommonUtils.getNode("outofflow", doc);
+    outOfFlow.style.left = rectArea.left + "px";
+    outOfFlow.style.top = rectArea.top + "px";
+  });
+
+  const area = findAccessibleChildByID(accDoc, "area");
+  await testChildAtPoint(dpr, 1, 1, area, area, area);
+
+  info("Test image maps. Their children are not in the layout tree.");
+  const imgmap = findAccessibleChildByID(accDoc, "imgmap");
+  const theLetterA = imgmap.firstChild;
+  await hitTest(browser, imgmap, theLetterA, theLetterA);
+  await hitTest(
+    browser,
+    findAccessibleChildByID(accDoc, "container"),
+    imgmap,
+    theLetterA
+  );
+
+  info("hit testing for element contained by zero-width element");
+  const container2Input = findAccessibleChildByID(accDoc, "container2_input");
+  await hitTest(
+    browser,
+    findAccessibleChildByID(accDoc, "container2"),
+    container2Input,
+    container2Input
+  );
+
+  info("hittesting table, row, cells -- rows are not in the layout tree");
+  const table = findAccessibleChildByID(accDoc, "table");
+  const row = findAccessibleChildByID(accDoc, "row");
+  const cell1 = findAccessibleChildByID(accDoc, "cell1");
+
+  await hitTest(browser, table, row, cell1);
+
+  info("Testing that an inaccessible child doesn't break hit testing");
+  const containerWithInaccessibleChild = findAccessibleChildByID(
+    accDoc,
+    "containerWithInaccessibleChild"
+  );
+  const containerWithInaccessibleChildP2 = findAccessibleChildByID(
+    accDoc,
+    "containerWithInaccessibleChild_p2"
+  );
+  await hitTest(
+    browser,
+    containerWithInaccessibleChild,
+    containerWithInaccessibleChildP2,
+    containerWithInaccessibleChildP2.firstChild
+  );
+
+  info("Testing wrapped text");
+  const wrappedTextP = findAccessibleChildByID(accDoc, "wrappedTextP");
+  const wrappedTextA = findAccessibleChildByID(accDoc, "wrappedTextA");
+  await hitTest(browser, wrappedTextP, wrappedTextA, wrappedTextA.firstChild);
+}
+
+addAccessibleTask(
+  `
+  <div role="list" id="list">
+    <div role="listitem" id="listitem"><span title="foo" id="inner">inner</span>item</div>
+  </div>
+
+  <span role="button">button1</span><span role="button" id="btn">button2</span>
+
+  <span role="textbox">textbox1</span><span role="textbox" id="txt">textbox2</span>
+
+  <div id="outofflow" style="width: 10px; height: 10px; position: absolute; left: 0px; top: 0px; background-color: yellow;">
+  </div>
+  <div id="area" style="width: 100px; height: 100px; background-color: blue;"></div>
+
+  <map name="atoz_map">
+    <area id="thelettera" href="http://www.bbc.co.uk/radio4/atoz/index.shtml#a"
+          coords="0,0,15,15" alt="thelettera" shape="rect"/>
+  </map>
+
+  <div id="container">
+    <img id="imgmap" width="447" height="15" usemap="#atoz_map" src="http://example.com/a11y/accessible/tests/mochitest/letters.gif"/>
+  </div>
+
+  <div id="container2" style="width: 0px">
+    <input id="container2_input">
+  </div>
+
+  <table id="table" border>
+    <tr id="row">
+      <td id="cell1">hello</td>
+      <td id="cell2">world</td>
+    </tr>
+  </table>
+
+  <div id="containerWithInaccessibleChild">
+    <p>hi</p>
+    <p aria-hidden="true">hi</p>
+    <p id="containerWithInaccessibleChild_p2">bye</p>
+  </div>
+
+  <p id="wrappedTextP" style="width: 3ch; font-family: monospace;">
+    <a id="wrappedTextA" href="https://example.com/">a</a>b cd
+  </p>
+  `,
+  runTests,
+  {
+    iframe: true,
+    remoteIframe: true,
+    // Ensure that all hittest elements are in view.
+    iframeAttrs: { style: "width: 600px; height: 600px; padding: 10px;" },
+  }
+);
+
+addAccessibleTask(
+  `
+  <div id="container">
+    <h1 id="a">A</h1><h1 id="b">B</h1>
+  </div>
+  `,
+  async function (browser, accDoc) {
+    const a = findAccessibleChildByID(accDoc, "a");
+    const b = findAccessibleChildByID(accDoc, "b");
+    const dpr = await getContentDPR(browser);
+    // eslint-disable-next-line no-unused-vars
+    const [x, y, w, h] = Layout.getBounds(a, dpr);
+    // The point passed below will be made relative to `b`, but
+    // we'd like to test a point within `a`. Pass `a`s negative
+    // width for an x offset. Pass zero as a y offset,
+    // assuming the headings are on the same line.
+    await testChildAtPoint(dpr, -w, 0, b, null, null);
+  },
+  {
+    iframe: true,
+    remoteIframe: true,
+    // Ensure that all hittest elements are in view.
+    iframeAttrs: { style: "width: 600px; height: 600px; padding: 10px;" },
+  }
+);
+
+addAccessibleTask(
+  `
+  <style>
+    div {
+      width: 50px;
+      height: 50px;
+      position: relative;
+    }
+
+    div > div {
+      width: 30px;
+      height: 30px;
+      position: absolute;
+      opacity: 0.9;
+    }
+  </style>
+  <div id="a" style="background-color: orange;">
+    <div id="aa" style="background-color: purple;"></div>
+  </div>
+  <div id="b" style="background-color: yellowgreen;">
+    <div id="bb" style="top: -30px; background-color: turquoise"></div>
+  </div>`,
+  async function (browser, accDoc) {
+    const a = findAccessibleChildByID(accDoc, "a");
+    const aa = findAccessibleChildByID(accDoc, "aa");
+    const dpr = await getContentDPR(browser);
+    const [, , w, h] = Layout.getBounds(a, dpr);
+    // test upper left of `a`
+    await testChildAtPoint(dpr, 1, 1, a, aa, aa);
+    // test upper right of `a`
+    await testChildAtPoint(dpr, w - 1, 1, a, a, a);
+    // test just outside upper left of `a`
+    await testChildAtPoint(dpr, 1, -1, a, null, null);
+    // test halfway down/left of `a`
+    await testChildAtPoint(dpr, 1, Math.round(h / 2), a, a, a);
+  },
+  {
+    chrome: true,
+    topLevel: true,
+    iframe: false,
+    remoteIframe: false,
+    // Ensure that all hittest elements are in view.
+    iframeAttrs: { style: "width: 600px; height: 600px; padding: 10px;" },
+  }
+);
+
+/**
+ * Verify that hit testing returns the proper accessible when one acc content
+ * is partially hidden due to overflow:hidden;
+ */
+addAccessibleTask(
+  `
+  <style>
+    div div {
+      overflow: hidden;
+      font-family: monospace;
+      width: 2ch;
+    }
+  </style>
+  <div id="container" style="display: flex; flex-direction: row-reverse;">
+    <div id="aNode">abcde</div><div id="fNode">fghij</div>
+  </div>`,
+  async function (browser, docAcc) {
+    const container = findAccessibleChildByID(docAcc, "container");
+    const aNode = findAccessibleChildByID(docAcc, "aNode");
+    const fNode = findAccessibleChildByID(docAcc, "fNode");
+    const dpr = await getContentDPR(browser);
+    const [, , containerWidth] = Layout.getBounds(container, dpr);
+    const [, , aNodeWidth] = Layout.getBounds(aNode, dpr);
+
+    await testChildAtPoint(
+      dpr,
+      containerWidth - 1,
+      1,
+      container,
+      aNode,
+      aNode.firstChild
+    );
+    await testChildAtPoint(
+      dpr,
+      containerWidth - aNodeWidth - 1,
+      1,
+      container,
+      fNode,
+      fNode.firstChild
+    );
+  },
+  { chrome: true, iframe: true, remoteIframe: true }
+);
+
+/**
+ * Verify that hit testing is appropriately fuzzy when working with generics.
+ * If we match on a generic which contains additional generics and a single text
+ * leaf, we should return the text leaf as the deepest match instead of the
+ * generic itself.
+ */
+addAccessibleTask(
+  `
+  <a href="example.com" id="link">
+    <span style="overflow:hidden;" id="generic"><span aria-hidden="true" id="visible">I am some visible text</span><span id="invisible" style="overflow:hidden; height: 1px; width: 1px; position:absolute; clip: rect(0 0 0 0); display:block;">I am some invisible text</span></span>
+  </a>`,
+  async function (browser, docAcc) {
+    const link = findAccessibleChildByID(docAcc, "link");
+    const generic = findAccessibleChildByID(docAcc, "generic");
+    const invisible = findAccessibleChildByID(docAcc, "invisible");
+    const dpr = await getContentDPR(browser);
+
+    await testChildAtPoint(
+      dpr,
+      1,
+      1,
+      link,
+      generic, // Direct Child
+      invisible.firstChild // Deepest Child
+    );
+
+    await testOffsetAtPoint(
+      findAccessibleChildByID(docAcc, "invisible", [Ci.nsIAccessibleText]),
+      1,
+      1,
+      COORDTYPE_PARENT_RELATIVE,
+      0
+    );
+  },
+  { chrome: false, iframe: true, remoteIframe: true }
+);
+
+/**
+ * Verify that hit testing is appropriately fuzzy when working with generics with siblings.
+ * We should return the deepest text leaf as the deepest match instead of the generic itself.
+ */
+addAccessibleTask(
+  `
+<div id="generic"><span aria-hidden="true" id="visible">Mozilla</span><span id="invisible" style="display: block !important;border: 0 !important;clip: rect(0 0 0 0) !important;height: 1px !important;margin: -1px !important;overflow: hidden !important;padding: 0 !important;position: absolute !important;white-space: nowrap !important;width: 1px !important;">hello world<br><div id="extraContainer">Mozilla</div></span><br>I am some other text</div>`,
+  async function (browser, docAcc) {
+    const generic = findAccessibleChildByID(docAcc, "generic");
+    const invisible = findAccessibleChildByID(docAcc, "invisible");
+    const dpr = await getContentDPR(browser);
+
+    await testChildAtPoint(
+      dpr,
+      1,
+      1,
+      generic,
+      invisible, // Direct Child
+      invisible.firstChild // Deepest Child
+    );
+  },
+  { chrome: false, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_scroll_hittest.js b/accessible/tests/browser/hittest/browser_test_scroll_hittest.js
new file mode 100644
index 0000000000..246dcd3d09
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_scroll_hittest.js
@@ -0,0 +1,105 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * Verify that hit testing returns the proper accessible when one accessible
+ * covers another accessible due to scroll clipping. See Bug 1819741.
+ */
+addAccessibleTask(
+  `
+<div id="container" style="height: 100%; position: absolute; flex-direction: column; display: flex;">
+  <div id="title-bar" style="height: 500px; background-color: red;"></div>
+  <div id="message-container" style="overflow-y: hidden; display: flex;">
+    <div style="overflow-y: auto;" id="message-scrollable">
+      <p style="white-space: pre-line;">
+        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec dictum luctus molestie. Nam in libero mi. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.
+
+        Praesent aliquet semper libero, eu ullamcorper tortor vestibulum ac. Sed non pharetra sem. Quisque sodales ipsum a ipsum condimentum porttitor. Integer luctus pellentesque ipsum, eu dignissim nunc fermentum in.
+
+        Etiam blandit nisl vitae dolor molestie faucibus. In euismod, massa vitae commodo bibendum, urna augue pharetra nibh, et sagittis libero est in ligula. Mauris tincidunt risus ornare, rutrum augue in, blandit ligula. Aenean ultrices vel risus sit amet varius.
+
+        Vivamus pretium ultricies nisi a cursus. Integer cursus quam a metus ultricies, vel pulvinar nunc varius. Quisque facilisis lorem eget ipsum vehicula, laoreet congue lorem viverra.
+
+        Praesent dignissim, diam sed semper ultricies, diam ex laoreet justo, ac euismod massa metus pharetra nunc. Vestibulum sapien erat, consequat at eleifend id, suscipit sit amet mi.
+
+        Curabitur sed mauris vitae justo rutrum convallis ac sed justo. Ut nec est sed nisi feugiat egestas. Mauris accumsan mi eget nibh fermentum, in dignissim odio feugiat.
+
+        Maecenas augue dolor, gravida ut ultrices ultricies, condimentum et dui. In sed augue fermentum, posuere velit et, pulvinar tellus. Morbi id fermentum quam, at varius arcu.
+
+        Duis elementum vitae sapien id tincidunt. Aliquam velit ligula, sollicitudin eget placerat non, aliquam at erat. Pellentesque non porta metus. Mauris vel finibus sem, nec ullamcorper leo.
+
+        Nulla sit amet lorem vitae diam consectetur porttitor a cursus massa. Sed id ornare lorem. Sed placerat facilisis ipsum et ultricies. Sed eu semper enim, ut aliquet odio.
+
+        Sed nulla ex, pharetra vel porttitor congue, dictum et purus. Suspendisse vel risus sit amet nulla volutpat ullamcorper. Morbi et ullamcorper est. Pellentesque eget porta risus. Nullam non felis elementum, auctor massa et, consectetur neque.
+
+        Fusce sit amet arcu finibus, ornare sem sed, tempus nibh. Donec rutrum odio eget bibendum pulvinar. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.
+
+        Phasellus sed risus diam. Vivamus mollis, risus ac feugiat pellentesque, ligula tortor finibus libero, et venenatis turpis lectus et justo. Suspendisse euismod mi at lectus sagittis dignissim. Mauris a ornare enim.
+      </p>
+    </div>
+  </div>
+  <div id="footer-bar" style="height: 500px; background-color: blue;"></div>
+</div>
+  `,
+  async function (browser, docAcc) {
+    const container = findAccessibleChildByID(docAcc, "container");
+    const scrollable = findAccessibleChildByID(docAcc, "message-scrollable");
+    const titleBar = findAccessibleChildByID(docAcc, "title-bar");
+    const footerBar = findAccessibleChildByID(docAcc, "footer-bar");
+    const dpr = await getContentDPR(browser);
+    const [, , , titleBarHeight] = Layout.getBounds(titleBar, dpr);
+    const [, , , scrollableHeight] = Layout.getBounds(scrollable, dpr);
+
+    // Verify that the child at this point is not the underlying paragraph.
+    info(
+      "Testing that the deepest child at this point is the overlaid section, not the paragraph beneath it."
+    );
+    await testChildAtPoint(
+      dpr,
+      1,
+      titleBarHeight - 1,
+      container,
+      titleBar,
+      titleBar
+    );
+    await testChildAtPoint(
+      dpr,
+      1,
+      titleBarHeight + scrollableHeight + 1,
+      container,
+      footerBar,
+      footerBar
+    );
+
+    await invokeContentTask(browser, [], () => {
+      // Scroll the text down.
+      let elem = content.document.getElementById("message-scrollable");
+      elem.scrollTo(0, elem.scrollHeight);
+    });
+    await waitForContentPaint(browser);
+
+    info(
+      "Testing that the deepest child at this point is still the overlaid section, after scrolling the paragraph."
+    );
+    await testChildAtPoint(
+      dpr,
+      1,
+      titleBarHeight - 1,
+      container,
+      titleBar,
+      titleBar
+    );
+    await testChildAtPoint(
+      dpr,
+      1,
+      titleBarHeight + scrollableHeight + 1,
+      container,
+      footerBar,
+      footerBar
+    );
+  },
+  { chrome: true, iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_shadowroot.js b/accessible/tests/browser/hittest/browser_test_shadowroot.js
new file mode 100644
index 0000000000..94a5ce071a
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_shadowroot.js
@@ -0,0 +1,61 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+async function runTests(browser, accDoc) {
+  const dpr = await getContentDPR(browser);
+  let componentAcc = findAccessibleChildByID(accDoc, "component1");
+  await testChildAtPoint(
+    dpr,
+    1,
+    1,
+    componentAcc,
+    componentAcc.firstChild,
+    componentAcc.firstChild
+  );
+
+  componentAcc = findAccessibleChildByID(accDoc, "component2");
+  await testChildAtPoint(
+    dpr,
+    1,
+    1,
+    componentAcc,
+    componentAcc.firstChild,
+    componentAcc.firstChild
+  );
+}
+
+addAccessibleTask(
+  `
+  <div role="group" class="components" id="component1" style="display: inline-block;">
+  <!--
+    <div role="button" id="component-child"
+         style="width: 100px; height: 100px; background-color: pink;">
+    </div>
+  -->
+  </div>
+  <div role="group" class="components"  id="component2" style="display: inline-block;">
+  <!--
+    <button>Hello world</button>
+  -->
+  </div>
+  <script>
+    // This routine adds the comment children of each 'component' to its
+    // shadow root.
+    var components = document.querySelectorAll(".components");
+    for (var i = 0; i < components.length; i++) {
+      var component = components[i];
+      var shadow = component.attachShadow({mode: "open"});
+      for (var child = component.firstChild; child; child = child.nextSibling) {
+        if (child.nodeType === 8)
+          // eslint-disable-next-line no-unsanitized/property
+          shadow.innerHTML = child.data;
+      }
+    }
+  </script>
+  `,
+  runTests,
+  { iframe: true, remoteIframe: true }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_text.js b/accessible/tests/browser/hittest/browser_test_text.js
new file mode 100644
index 0000000000..130f077f29
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_text.js
@@ -0,0 +1,84 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+addAccessibleTask(
+  `
+a
+<div id="noChars" style="width: 5px; height: 5px;"><p></p></div>
+<p id="twoText"><span>a</span><span>b</span></p>
+<div id="iframeAtEnd" style="width: 20px; height: 20px;">
+  a
+  <iframe width="1" height="1"></iframe>
+</div>
+<button id="pointBeforeText">
+  <div style="display: flex;">
+    <div style="width: 100px; background-color: red;" role="none"></div>
+    test
+    <div style="width: 100px; background-color: blue;" role="none"></div>
+  </div>
+</button>
+  `,
+  async function (browser, docAcc) {
+    const dpr = await getContentDPR(browser);
+    // Test getOffsetAtPoint on a container containing no characters. The inner
+    // container does not include the requested point, but the outer one does.
+    const noChars = findAccessibleChildByID(docAcc, "noChars", [
+      Ci.nsIAccessibleText,
+    ]);
+    let [x, y] = Layout.getBounds(noChars, dpr);
+    await testOffsetAtPoint(noChars, x, y, COORDTYPE_SCREEN_RELATIVE, -1);
+
+    // Test that the correct offset is returned for a point in a second text
+    // leaf.
+    const twoText = findAccessibleChildByID(docAcc, "twoText", [
+      Ci.nsIAccessibleText,
+    ]);
+    const text2 = twoText.getChildAt(1);
+    [x, y] = Layout.getBounds(text2, dpr);
+    await testOffsetAtPoint(twoText, x, y, COORDTYPE_SCREEN_RELATIVE, 1);
+
+    // Test offsetAtPoint when there is an iframe at the end of the container.
+    const iframeAtEnd = findAccessibleChildByID(docAcc, "iframeAtEnd", [
+      Ci.nsIAccessibleText,
+    ]);
+    let width;
+    let height;
+    [x, y, width, height] = Layout.getBounds(iframeAtEnd, dpr);
+    x += width - 1;
+    y += height - 1;
+    await testOffsetAtPoint(iframeAtEnd, x, y, COORDTYPE_SCREEN_RELATIVE, -1);
+
+    // Test that 0 is returned if the point is within the container but before
+    // the rectangle at offset 0. This is buggy behavior that some users have
+    // unfortunately come to rely on (bug 1816601).
+    const pointBeforeText = findAccessibleChildByID(docAcc, "pointBeforeText", [
+      Ci.nsIAccessibleText,
+    ]);
+    [x, y, width, height] = Layout.getBounds(pointBeforeText, dpr);
+    await testOffsetAtPoint(
+      pointBeforeText,
+      x + 1,
+      y + 1,
+      COORDTYPE_SCREEN_RELATIVE,
+      0
+    );
+    // But this buggy behavior only applies for a point before offset 0, not
+    // a point after the last offset. So it's asymmetrically buggy. :(
+    await testOffsetAtPoint(
+      pointBeforeText,
+      x + width - 1,
+      y + height - 1,
+      COORDTYPE_SCREEN_RELATIVE,
+      -1
+    );
+  },
+  {
+    topLevel: true,
+    iframe: true,
+    remoteIframe: true,
+    chrome: true,
+  }
+);
diff --git a/accessible/tests/browser/hittest/browser_test_zoom.js b/accessible/tests/browser/hittest/browser_test_zoom.js
new file mode 100644
index 0000000000..84383df483
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_zoom.js
@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+async function runTests(browser, accDoc) {
+  if (Services.appinfo.OS !== "Darwin") {
+    const p1 = findAccessibleChildByID(accDoc, "p1");
+    const p2 = findAccessibleChildByID(accDoc, "p2");
+    await hitTest(browser, accDoc, p1, p1.firstChild);
+    await hitTest(browser, accDoc, p2, p2.firstChild);
+
+    await invokeContentTask(browser, [], () => {
+      const { Layout } = ChromeUtils.importESModule(
+        "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs"
+      );
+
+      Layout.zoomDocument(content.document, 2.0);
+      content.document.body.offsetTop; // getBounds doesn't flush layout on its own.
+    });
+
+    await hitTest(browser, accDoc, p1, p1.firstChild);
+    await hitTest(browser, accDoc, p2, p2.firstChild);
+  } else {
+    todo(
+      false,
+      "Bug 746974 - deepest child must be correct on all platforms, disabling on Mac!"
+    );
+  }
+}
+
+addAccessibleTask(`<p id="p1">para 1</p><p id="p2">para 2</p>`, runTests, {
+  iframe: true,
+  remoteIframe: true,
+  // Ensure that all hittest elements are in view.
+  iframeAttrs: { style: "left: 100px; top: 100px;" },
+});
diff --git a/accessible/tests/browser/hittest/browser_test_zoom_text.js b/accessible/tests/browser/hittest/browser_test_zoom_text.js
new file mode 100644
index 0000000000..9e429c16b3
--- /dev/null
+++ b/accessible/tests/browser/hittest/browser_test_zoom_text.js
@@ -0,0 +1,64 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+async function runTests(browser, accDoc) {
+  const expectedLength = await invokeContentTask(browser, [], () => {
+    const { CommonUtils } = ChromeUtils.importESModule(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Common.sys.mjs"
+    );
+    const hyperText = CommonUtils.getNode("paragraph", content.document);
+    return Math.floor(hyperText.textContent.length / 2);
+  });
+  const hyperText = findAccessibleChildByID(accDoc, "paragraph", [
+    Ci.nsIAccessibleText,
+  ]);
+  const textNode = hyperText.firstChild;
+
+  let [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  await testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+
+  await invokeContentTask(browser, [], () => {
+    const { Layout } = ChromeUtils.importESModule(
+      "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs"
+    );
+
+    Layout.zoomDocument(content.document, 2.0);
+    content.document.body.offsetTop; // getBounds doesn't flush layout on its own.
+  });
+
+  [x, y, width, height] = Layout.getBounds(
+    textNode,
+    await getContentDPR(browser)
+  );
+
+  await testOffsetAtPoint(
+    hyperText,
+    x + width / 2,
+    y + height / 2,
+    COORDTYPE_SCREEN_RELATIVE,
+    expectedLength
+  );
+}
+
+addAccessibleTask(
+  `<p id="paragraph" style="font-family: monospace;">hello world hello world</p>`,
+  runTests,
+  {
+    iframe: true,
+    remoteIframe: true,
+    iframeAttrs: { style: "width: 600px; height: 600px;" },
+  }
+);
diff --git a/accessible/tests/browser/hittest/head.js b/accessible/tests/browser/hittest/head.js
new file mode 100644
index 0000000000..c2904b1578
--- /dev/null
+++ b/accessible/tests/browser/hittest/head.js
@@ -0,0 +1,113 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/* exported CommonUtils, testChildAtPoint, Layout, hitTest, testOffsetAtPoint */
+
+// Load the shared-head file first.
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/accessible/tests/browser/shared-head.js",
+  this
+);
+
+// Loading and common.js from accessible/tests/mochitest/ for all tests, as
+// well as promisified-events.js.
+loadScripts(
+  { name: "common.js", dir: MOCHITESTS_DIR },
+  { name: "promisified-events.js", dir: MOCHITESTS_DIR }
+);
+
+const { CommonUtils } = ChromeUtils.importESModule(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Common.sys.mjs"
+);
+
+const { Layout } = ChromeUtils.importESModule(
+  "chrome://mochitests/content/browser/accessible/tests/browser/Layout.sys.mjs"
+);
+
+function getChildAtPoint(container, x, y, findDeepestChild) {
+  try {
+    return findDeepestChild
+      ? container.getDeepestChildAtPoint(x, y)
+      : container.getChildAtPoint(x, y);
+  } catch (e) {
+    // Failed to get child at point.
+  }
+  info("could not get child at point");
+  return null;
+}
+
+async function testChildAtPoint(dpr, x, y, container, child, grandChild) {
+  const [containerX, containerY] = Layout.getBounds(container, dpr);
+  x += containerX;
+  y += containerY;
+  let actual = null;
+  await untilCacheIs(
+    () => {
+      actual = getChildAtPoint(container, x, y, false);
+      info(`Got direct child match of ${CommonUtils.prettyName(actual)}`);
+      return actual;
+    },
+    child,
+    `Wrong direct child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(
+      child
+    )} and got ${CommonUtils.prettyName(actual)}`
+  );
+  actual = null;
+  await untilCacheIs(
+    () => {
+      actual = getChildAtPoint(container, x, y, true);
+      info(`Got deepest child match of ${CommonUtils.prettyName(actual)}`);
+      return actual;
+    },
+    grandChild,
+    `Wrong deepest child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(
+      grandChild
+    )} and got ${CommonUtils.prettyName(actual)}`
+  );
+}
+
+/**
+ * Test if getChildAtPoint returns the given child and grand child accessibles
+ * at coordinates of child accessible (direct and deep hit test).
+ */
+async function hitTest(browser, container, child, grandChild) {
+  const [childX, childY] = await getContentBoundsForDOMElm(
+    browser,
+    getAccessibleDOMNodeID(child)
+  );
+  const x = childX + 1;
+  const y = childY + 1;
+
+  await untilCacheIs(
+    () => getChildAtPoint(container, x, y, false),
+    child,
+    `Wrong direct child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(child)}`
+  );
+  await untilCacheIs(
+    () => getChildAtPoint(container, x, y, true),
+    grandChild,
+    `Wrong deepest child accessible at the point (${x}, ${y}) of ${CommonUtils.prettyName(
+      container
+    )}, sought ${CommonUtils.prettyName(grandChild)}`
+  );
+}
+
+/**
+ * Test if getOffsetAtPoint returns the given text offset at given coordinates.
+ */
+async function testOffsetAtPoint(hyperText, x, y, coordType, expectedOffset) {
+  await untilCacheIs(
+    () => hyperText.getOffsetAtPoint(x, y, coordType),
+    expectedOffset,
+    `Wrong offset at given point (${x}, ${y}) for ${prettyName(hyperText)}`
+  );
+}