<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>

<window title="Popup Anchor Tests"
  xmlns:html="http://www.w3.org/1999/xhtml"
  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <panel id="testPanel"
         type="arrow"
         animate="false"
         noautohide="true">
  </panel>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

<script>
<![CDATA[
var anchor, panel;

function is_close(got, exp, msg) {
  // on some platforms we see differences of a fraction of a pixel - so
  // allow any difference of < 1 pixels as being OK.
  ok(Math.abs(got - exp) < 1, msg + ": " + got + " should be equal(-ish) to " + exp);
}

function margins(popup) {
  let ret = {};
  let cs = getComputedStyle(popup);
  for (let side of ["top", "right", "bottom", "left"]) {
    ret[side] = parseFloat(cs.getPropertyValue("margin-" + side));
  }
  return ret;
}

function checkPositionRelativeToAnchor(side) {
  var panelRect = panel.getBoundingClientRect();
  var anchorRect = anchor.getBoundingClientRect();
  switch (side) {
    case "left":
    case "right":
      is_close(panelRect.top - margins(panel).top, anchorRect.bottom, "top of panel should be at bottom of anchor");
      break;
    case "top":
    case "bottom":
      is_close(panelRect.right + margins(panel).left, anchorRect.left, "right of panel should be left of anchor");
      break;
    default:
      ok(false, "unknown side " + side);
      break;
  }
}

function openSlidingPopup(position, callback) {
  panel.setAttribute("flip", "slide");
  _openPopup(position, callback);
}

function openPopup(position, callback) {
  panel.setAttribute("flip", "both");
  _openPopup(position, callback);
}

async function waitForPopupPositioned(actionFn, callback)
{
  info("waitForPopupPositioned");
  let a = new Promise(resolve => {
    panel.addEventListener("popuppositioned", () => resolve(true), { once: true });
  });

  actionFn();

  // Ensure we get at least one event, but we might get more than one, so wait for them as needed.
  //
  // The double-raf ensures layout runs once. setTimeout is needed because that's how popuppositioned is scheduled.
  let b = new Promise(resolve => {
    requestAnimationFrame(() => requestAnimationFrame(() => {
      setTimeout(() => resolve(false), 0);
    }));
  });

  let gotEvent = await Promise.race([a, b]);
  info("got event: " + gotEvent);
  if (gotEvent) {
    waitForPopupPositioned(() => {}, callback);
  } else {
    SimpleTest.executeSoon(callback);
  }
}

function _openPopup(position, callback) {
  panel.setAttribute("side", "noside");
  panel.addEventListener("popupshown", callback, {once: true});
  panel.openPopup(anchor, position);
}

var tests = [
  // A panel with the anchor after_end - the anchor should not move on resize
  ['simpleResizeHorizontal', 'middle', function(next) {
    openPopup("after_end", function() {
      checkPositionRelativeToAnchor("right");
      var origPanelRect = panel.getBoundingClientRect();
      panel.sizeTo(100, 100);
      checkPositionRelativeToAnchor("right"); // should not have flipped, so still "right"
      panel.sizeTo(origPanelRect.width, origPanelRect.height);
      checkPositionRelativeToAnchor("right"); // should not have flipped, so still "right"
      next();
    });
  }],

  ['simpleResizeVertical', 'middle', function(next) {
    openPopup("start_after", function() {
      checkPositionRelativeToAnchor("bottom");
      var origPanelRect = panel.getBoundingClientRect();
      panel.sizeTo(100, 100);
      checkPositionRelativeToAnchor("bottom"); // should not have flipped.
      panel.sizeTo(origPanelRect.width, origPanelRect.height);
      checkPositionRelativeToAnchor("bottom"); // should not have flipped.
      next();
    });
  }],
  ['flippingResizeHorizontal', 'middle', function(next) {
    openPopup("after_end", function() {
      checkPositionRelativeToAnchor("right");
      waitForPopupPositioned(
        () => { panel.sizeTo(anchor.getBoundingClientRect().left + 50, 50); },
        () => {
          checkPositionRelativeToAnchor("left"); // check it flipped.
          next();
        });
    });
  }],
  ['flippingResizeVertical', 'middle', function(next) {
    openPopup("start_after", function() {
      checkPositionRelativeToAnchor("bottom");
      waitForPopupPositioned(
        () => { panel.sizeTo(50, anchor.getBoundingClientRect().top + 50); },
        () => {
          checkPositionRelativeToAnchor("top"); // check it flipped.
          next();
        });
    });
  }],

  ['simpleMoveToAnchorHorizontal', 'middle', function(next) {
    openPopup("after_end", function() {
      checkPositionRelativeToAnchor("right");
      waitForPopupPositioned(
       () => { panel.moveToAnchor(anchor, "after_end", 20, 0); },
       () => {
         // the anchor and the panel should have moved 20px right without flipping.
         checkPositionRelativeToAnchor("right");
         waitForPopupPositioned(
           () => { panel.moveToAnchor(anchor, "after_end", -20, 0);  },
           () => {
             // the anchor and the panel should have moved 20px left without flipping.
             checkPositionRelativeToAnchor("right");
             next();
          });
       });
    });
  }],

  ['simpleMoveToAnchorVertical', 'middle', function(next) {
    openPopup("start_after", function() {
      checkPositionRelativeToAnchor("bottom");
      waitForPopupPositioned(
       () => { panel.moveToAnchor(anchor, "start_after", 0, 20); },
       () => {
         // the anchor and the panel should have moved 20px down without flipping.
         checkPositionRelativeToAnchor("bottom");
         waitForPopupPositioned(
           () => { panel.moveToAnchor(anchor, "start_after", 0, -20) },
           () => {
             // the anchor and the panel should have moved 20px up without flipping.
             checkPositionRelativeToAnchor("bottom");
             next();
          });
       });
    });
  }],

  // Do a moveToAnchor that causes the panel to flip horizontally
  ['flippingMoveToAnchorHorizontal', 'middle', function(next) {
    var anchorRight = anchor.getBoundingClientRect().right;
    // Size the panel such that it only just fits from the left-hand side of
    // the window to the right of the anchor - thus, it will fit when
    // anchored to the right-hand side of the anchor.
    panel.sizeTo(anchorRight - 10, 100);
    openPopup("after_end", function() {
      checkPositionRelativeToAnchor("right");
      // Ask for it to be anchored 1/2 way between the left edge of the window
      // and the anchor right - it can't fit with the panel on the left/arrow
      // on the right, so it must flip (arrow on the left, panel on the right)
      var offset = Math.floor(-anchorRight / 2);

      waitForPopupPositioned(
        () => panel.moveToAnchor(anchor, "after_end", offset, 0),
        () => {
          checkPositionRelativeToAnchor("left");
          // resize back to original and move to a zero offset - it should flip back.

          panel.sizeTo(anchorRight - 10, 100);
          waitForPopupPositioned(
            () => panel.moveToAnchor(anchor, "after_end", 0, 0),
            () => {
              checkPositionRelativeToAnchor("right"); // should have flipped back.
              next();
            });
        });
    });
  }],

  // Do a moveToAnchor that causes the panel to flip vertically
  ['flippingMoveToAnchorVertical', 'middle', function(next) {
    var anchorBottom = anchor.getBoundingClientRect().bottom;
    // See comments above in flippingMoveToAnchorHorizontal, but read
    // "top/bottom" instead of "left/right"
    panel.sizeTo(100, anchorBottom - 10);
    openPopup("start_after", function() {
      checkPositionRelativeToAnchor("bottom");
      var offset = Math.floor(-anchorBottom / 2);

      waitForPopupPositioned(
        () => panel.moveToAnchor(anchor, "start_after", 0, offset),
        () => {
          checkPositionRelativeToAnchor("top");
          panel.sizeTo(100, anchorBottom - 10);

          waitForPopupPositioned(
            () => panel.moveToAnchor(anchor, "start_after", 0, 0),
            () => {
              checkPositionRelativeToAnchor("bottom");
              next();
            });
        });
    });
  }],

  ['veryWidePanel-after_end', 'middle', function(next) {
    openSlidingPopup("after_end", function() {
      waitForPopupPositioned(
        () => { panel.sizeTo(window.innerWidth - 10, 60); },
        () => {
          is(panel.getBoundingClientRect().width, window.innerWidth - 10, "width is what we requested.")
          next();
      });
    });
  }],

  ['veryWidePanel-before_start', 'middle', function(next) {
    openSlidingPopup("before_start", function() {
      waitForPopupPositioned(
        () => { panel.sizeTo(window.innerWidth - 10, 60); },
        () => {
          is(panel.getBoundingClientRect().width, window.innerWidth - 10, "width is what we requested")
          next();
      });
    });
  }],

  ['veryTallPanel-start_after', 'middle', function(next) {
    openSlidingPopup("start_after", function() {
      waitForPopupPositioned(
        () => { panel.sizeTo(100, window.innerHeight - 10); },
        () => {
          is(panel.getBoundingClientRect().height, window.innerHeight - 10, "height is what we requested.")
          next();
        });
    });
  }],

  ['veryTallPanel-start_before', 'middle', function(next) {
    openSlidingPopup("start_before", function() {
      waitForPopupPositioned(
        () => { panel.sizeTo(100, window.innerHeight - 10); },
        () => {
          is(panel.getBoundingClientRect().height, window.innerHeight - 10, "height is what we requested")
          next();
      });
    });
  }],

  // Tests against the anchor at the right-hand side of the window
  ['afterend', 'right', function(next) {
    openPopup("after_end", function() {
      // when we request too far to the right/bottom, the panel gets shrunk
      // and moved.  The amount it is shrunk by is how far it is moved.
      checkPositionRelativeToAnchor("right");
      next();
    });
  }],

  ['after_start', 'right', function(next) {
    openPopup("after_start", function() {
      // See above - we are still too far to the right, but the anchor is
      // on the other side.
      checkPositionRelativeToAnchor("right");
      next();
    });
  }],

  // Tests against the anchor at the left-hand side of the window
  ['after_start', 'left', function(next) {
    openPopup("after_start", function() {
      var panelRect = panel.getBoundingClientRect();
      ok(panelRect.left - margins(panel).left >= 0, "panel remains within the screen");
      checkPositionRelativeToAnchor("left");
      next();
    });
  }],
]

function runTests() {
  function runNextTest() {
    let result = tests.shift();
    if (!result) {
      // out of tests
      panel.hidePopup();
      SimpleTest.finish();
      return;
    }
    let [name, anchorPos, test] = result;
    SimpleTest.info("sub-test " + anchorPos + "." + name + " starting");
    // first arrange for the anchor to be where the test requires it.
    panel.hidePopup();
    panel.sizeTo(100, 50);
    // hide all the anchors here, then later we make one of them visible.
    document.getElementById("anchor-left-wrapper").style.display = "none";
    document.getElementById("anchor-middle-wrapper").style.display = "none";
    document.getElementById("anchor-right-wrapper").style.display = "none";
    switch(anchorPos) {
      case 'middle':
        anchor = document.getElementById("anchor-middle");
        document.getElementById("anchor-middle-wrapper").style.display = "block";
        break;
      case 'left':
        anchor = document.getElementById("anchor-left");
        document.getElementById("anchor-left-wrapper").style.display = "block";
        break;
      case 'right':
        anchor = document.getElementById("anchor-right");
        document.getElementById("anchor-right-wrapper").style.display = "block";
        break;
      default:
        SimpleTest.ok(false, "Bad anchorPos: " + anchorPos);
        runNextTest();
        return;
    }
    try {
      test(runNextTest);
    } catch (ex) {
      SimpleTest.ok(false, "sub-test " + anchorPos + "." + name + " failed: " + ex.toString() + "\n" + ex.stack);
      runNextTest();
    }
  }
  runNextTest();
}

SimpleTest.waitForExplicitFinish();

addEventListener("load", function() {
  // anchor is set by the test runner above
  panel = document.getElementById("testPanel");

  runTests();
});

]]>
</script>

<body xmlns="http://www.w3.org/1999/xhtml">
<!-- Our tests assume at least 100px around the anchor on all sides, else the
     panel may flip when we don't expect it to
-->
<div id="anchor-middle-wrapper" style="margin: 100px 100px 100px 100px;">
  <p>The anchor --&gt; <span id="anchor-middle">v</span> &lt;--</p>
</div>
<div id="anchor-left-wrapper" style="text-align: left; display: none;">
  <p><span id="anchor-left">v</span> &lt;-- The anchor;</p>
</div>
<div id="anchor-right-wrapper" style="text-align: right; display: none;">
  <p>The anchor --&gt; <span id="anchor-right">v</span></p>
</div>
</body>

</window>