<!DOCTYPE HTML>
<title>nsIDOMWindowUtils::nodesFromRect test - bug 489127</title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="chrome://mochikit/content/tests/SimpleTest/test.css">
<script>
  var SimpleTest = window.opener.SimpleTest;
  function ok() { window.opener.ok.apply(window.opener, arguments); }
  function done() { window.opener.done.apply(window.opener, arguments); }
  function info() { window.opener.info.apply(window.opener, arguments); }

  let e = {};

  let dwu = window.windowUtils;

  function check(x, y, top, right, bottom, left, onlyVisible, list, aListIsComplete = false, aOpacityThreshold = 1.0) {
    let nodes = dwu.nodesFromRect(x, y, top, right, bottom, left, /* aIgnoreRootScrollFrame = */ true, /* aFlushLayout = */ true, onlyVisible, aOpacityThreshold);

    if (!aListIsComplete) {
      list.push(e.body);
      list.push(e.html);
    }

    if (nodes.length != list.length) {
      ok(false, "Different number of nodes (" + nodes.length + " vs. " + list.length +
                ") for rect [" + x + "," + y + "], " +
                "[" + top + "," + right + "," + bottom + "," + left + "]");
      return;
    }

    for (var i = 0; i < nodes.length; i++) {
      if (nodes[i] != list[i]) {
        ok(false, `Unexpected node #${i} (${nodes[i].id} vs. ${list[i].id}) ` +
                  `[${x}, ${y}] [${top}, ${right}, ${bottom}, ${left}]`);
        return;
      }
    }
    ok(true, "All correct nodes found for rect "  +
             "[" + x + "," + y + "], " +
             "[" + top + "," + right + "," + bottom + "," + left + "]");
  }

  function doTest() {
    // Set up shortcut access to elements
    e.html = document.documentElement;
    ['h1', 'd1', 'd2', 'p1', 'p2', 'p3', 'p4', 'p5', 'p6', 'span',
     'a1', 'a2', 'a3', 'transf', 'iframe1', 'body', 'opacity', 'host'].forEach(function(a) {
      e[a] = document.getElementById(a);
    });

    let shadow = e.host.attachShadow({ mode: "open" });
    shadow.innerHTML = `
      <style>
      #host-inner { height: 100px; width: 100px; background-color: blue }
      </style>
      <div id="host-inner"></div>
    `;

    window.scrollTo(0, 0);

    // Top, Right, Bottom, Left directions:
    check(53, 71, 0,  0,  0,  0, false, []);
    check(53, 71, 10, 0,  0,  0, false, [e.h1]);
    check(53, 71, 0,  10, 0,  0, false, [e.p3]);
    check(53, 71, 0,  0,  10, 0, false, [e.d1]);
    check(152, 105, 0, 0, 0, 10, false, [e.d1]);
    check(152, 105, 10, 10, 10, 10, false, [e.p4, e.p3, e.d1]);

    // e.p1 is invisible and shouldn't appear:
    check(153,193,0,0,0,0,false,[e.p5]);
    check(153,193,0,20,0,20, false, [e.p5, e.d2]);

    // Precise pixel checks:
    check(144, 183, 0, 0, 0, 0, false, []);
    check(144, 183, 0, 0, 1, 0, false, [e.p5]);
    check(144, 183, 0, 0, 0, 1, false, [e.d2]);
    check(144, 183, 0, 0, 1, 1, false, [e.p5, e.d2]);
    check(77,  240, 0, 0, 0, 0, false, [e.p2]);
    check(77,  240, 1, 0, 0, 0, false, [e.p5, e.p2]);
    check(77,  240, 0, 0, 1, 0, false, [e.span, e.p2]);
    check(77,  240, 1, 0, 1, 0, false, [e.p5, e.span, e.p2]);

    // Expanding area checks:
    check(39, 212, 0,  0,  0,  0, false, []);
    check(39, 212, 10, 0,  0,  0, false, [e.d2]);
    check(39, 212, 0,  0,  10, 0, false, [e.p2]);
    check(39, 212, 10, 1,  30, 0, false, [e.d2, e.p2]);
    check(39, 212, 10, 5,  30, 0, false, [e.span, e.d2, e.p2]);
    check(39, 212, 10, 15, 30, 0, false, [e.p5, e.span, e.d2, e.p2]);

    // Elements inside iframe shouldn't be returned:
    check(15, 410, 0, 30, 50, 0, false, [e.iframe1]);

    // Area with links and text nodes:
    let [x1, y1] = getCenterFor(e.a1);
    let [x2, y2] = getCenterFor(e.a2);
    let [x3, y3] = getCenterFor(e.a3);
    let [xt, yt] = [(x2 + x1) / 2, y1]; //text node between a1 and a2

    check(x1, y1, 0, 0,       0,       0, false, [e.a1.firstChild, e.a1, e.p6]);
    check(x1, y1, 0, 0,       y3 - y1, 0, false, [e.a3.firstChild, e.a3, e.a1.firstChild, e.a1, e.p6]);
    check(x1, y1, 0, xt - x1, 0,       0, false, [e.p6.childNodes[1], e.a1.firstChild, e.a1, e.p6]);
    check(x1, y1, 0, x2 - x1, 0,       0, false, [e.a2.firstChild, e.a2, e.p6.childNodes[1], e.a1.firstChild, e.a1, e.p6]);
    check(x1, y1, 0, x2 - x1, y3 - y1, 0, false, [e.a3.firstChild, e.a3, e.a2.firstChild, e.a2, e.p6.childNodes[1], e.a1.firstChild, e.a1, e.p6]);

    // 2d transform:
    check(61, 671, 0, 0,  0,  0,  false, []);
    check(61, 671, 0, 30, 0,  10, false, [e.transf]);
    check(61, 671, 0, 30, 90, 10, false, [e.transf.firstChild, e.transf]);

    {
      info("opacity: with and without aVisibleOnly = true");
      let [x, y] = getCenterFor(e.opacity);
      check(x, y, 1, 1, 1, 1, false, [e.opacity]);
      check(x, y, 1, 1, 1, 1, true, []);
    }

    // Check elements behind opaque backgrounds of other elements don't show up
    // in the list when aVisibleOnly = true.
    {
      info("elements behind opaque backgrounds of other elements with aVisibleOnly=true");
      let container = document.getElementById('obscured-test');
      let fg = document.getElementById('obscured-test-foreground');
      let bg = document.getElementById('obscured-test-background');

      let [x, y] = getCenterFor(container);
      check(x, y, 1, 1, 1, 1, false, [fg, bg, container]);

      const kListIsComplete = true;

      check(x, y, 1, 1, 1, 1, true, [fg], kListIsComplete);
      check(x, y, 1, 1, 1, 1, true, [fg], kListIsComplete, 0.5);

      info("Occluded with different opacity thresholds, with background colors and opacity");
      fg.style.backgroundColor = "rgba(0, 255, 0, 0.5)";
      check(x, y, 1, 1, 1, 1, true, [fg], kListIsComplete, 0.4);
      check(x, y, 1, 1, 1, 1, true, [fg, bg], kListIsComplete, 0.6);

      fg.style.backgroundColor = "";
      fg.style.opacity = "0.5";

      check(x, y, 1, 1, 1, 1, true, [fg], kListIsComplete, 0.4);
      check(x, y, 1, 1, 1, 1, true, [fg, bg], kListIsComplete, 0.6);
    }

    {
      info("Shadow DOM retargeting");

      let [x, y] = getCenterFor(e.host);
      let inner = shadow.getElementById("host-inner");
      check(x, y, 1, 1, 1, 1, false, [inner, e.host]);
    }

    done();
  }

  function getCenterFor(element) {
    let rect = element.getBoundingClientRect();
    return [(rect.left + rect.right) / 2, (rect.top + rect.bottom) / 2];
  }

  addLoadEvent(doTest);
</script>
<style>
body {
  margin: 8px;
  padding: 0;
}

h1, div, p, span, iframe {
  display: block;
  width: 100px;
  height: 30px;
  border: 3px solid black;
  padding: 10px;
  margin: 10px;
}

span {
  display: inline-block;
}

#iframe1 {
  height: 100px;
  margin-top: 60px;
}

#p6 {
  height: 50px;
  margin-top: 30px;
}

#transf {
  margin-top: 60px;
  -moz-transform: rotate(-45deg);
}

#opacity {
  opacity: 0;
  margin-top: 60px;
}

#decimal {
  position: relative;
  left: 0.5px;
  top: 50.5px;
}

#obscured-test {
  position: relative;
  width: 500px;
  height: 500px;
}

#obscured-test-background {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 0;
  background: red;
}

#obscured-test-foreground {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
  background: green;
}
</style>
<body id="body">
  <h1 id="h1"></h1>
  <div id="d1"></div>

  <!-- floated element -->
  <div id="d2" style="float: left"></div>

  <!-- hidden element -->
  <p id="p1" style="float: left; visibility: hidden"></p>

  <p id="p2" style="clear: left"><span id="span"></span></p>

  <!-- absolute position -->
  <p id="p3" style="position:absolute; top: 10px; left:50px; height:50px;"></p>

  <!-- fixed position -->
  <p id="p4" style="position: fixed; top: 30px; left: 150px; height: 50px; background-color: blue;"></p>

  <!-- relative position -->
  <p id="p5" style="position:relative; top: -100px; left: 30px; margin-bottom: -70px; background-color: green"></p>

  <!-- decimal CSS pixels -->
  <div id="decimal"></div>

  <iframe id="iframe1" src="data:text/html,<div>div</div><p>p</p>"></iframe>

  <p id="p6"><a href="#" id="a1">A</a> / <a href="#" id="a2">A</a><br/><a href="#" id="a3">A</a></p>

  <div id="transf">text</div>

  <div id="opacity">text</div>

  <div id="host"></div>

  <div id="obscured-test">
    <div id="obscured-test-background"></div>
    <div id="obscured-test-foreground"></div>
  </div>
</body>
