/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is browser test code.
 *
 * The Initial Developer of the Original Code is
 * the Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Drew Willcoxon <adw@mozilla.com> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * the provisions above, a recipient may use your version of this file under
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 *
 * ***** END LICENSE BLOCK ***** */

/**
 * This tests the "over-link" that appears in the location bar when the user
 * mouses over a link.  See bug 587908.
 */

var gTestIter;

// TESTS //////////////////////////////////////////////////////////////////////

let gTests = [

  function smokeTestGenerator() {
    // Make sure the location bar is not focused.
    gBrowser.contentWindow.focus();

    if (ensureOverLinkHidden())
      yield;

    setOverLinkWait("http://example.com/");
    yield;
    checkURLBar(true);

    setOverLinkWait("");
    yield;
    checkURLBar(false);
  },

  function hostPathLabels() {
    updateOverLink("http://example.com/");
    hostLabelIs("http://example.com/");
    pathLabelIs("");

    updateOverLink("http://example.com/foo");
    hostLabelIs("http://example.com/");
    pathLabelIs("foo");

    updateOverLink("javascript:popup('http://example.com/')");
    hostLabelIs("");
    pathLabelIs("javascript:popup('http://example.com/')");

    updateOverLink("javascript:popup('http://example.com/foo')");
    hostLabelIs("");
    pathLabelIs("javascript:popup('http://example.com/foo')");

    updateOverLink("about:home");
    hostLabelIs("");
    pathLabelIs("about:home");
  }

];

function test() {
  waitForExplicitFinish();
  runNextTest();
}

function runNextTest() {
  let nextTest = gTests.shift();
  if (nextTest) {
    dump("Running next test: " + nextTest.name + "\n");
    gTestIter = nextTest();

    // If the test is a generator, advance it.  Otherwise, we just ran the test.
    if (gTestIter)
      cont();
    else
      runNextTest();
  }
  else
    finish();
}

// HELPERS ////////////////////////////////////////////////////////////////////

/**
 * Advances the test iterator.  When all iterations have completed, the entire
 * suite is finish()ed.
 */
function cont() {
  try {
    gTestIter.next();
  }
  catch (err if err instanceof StopIteration) {
    runNextTest();
  }
  catch (err) {
    // Depending on who calls us, sometimes exceptions are eaten by event
    // handlers...  Make sure we fail.
    ok(false, "Exception: " + err);
    throw err;
  }
}

/**
 * Asserts that the location bar looks like it should.
 *
 * @param shouldShowOverLink
 *        True if you expect the over-link to be showing and false otherwise.
 */
function checkURLBar(shouldShowOverLink) {
  let overLink = window.getComputedStyle(gURLBar._overLinkBox, null);
  let origin = window.getComputedStyle(gURLBar._originLabel, null);
  let editLayer = window.getComputedStyle(gURLBar._textboxContainer, null);
  if (shouldShowOverLink) {
    isnot(origin.color, "transparent",
          "Origin color in over-link layer should not be transparent");
    is(overLink.opacity, 1, "Over-link should be opaque");
    is(editLayer.color, "transparent",
       "Edit layer color should be transparent");
  }
  else {
    is(origin.color, "transparent",
       "Origin color in over-link layer should be transparent");
    is(overLink.opacity, 0, "Over-link should be transparent");
    isnot(editLayer.color, "transparent",
          "Edit layer color should not be transparent");
  }
}

/**
 * Sets the over-link.  This assumes that str will cause the over-link to fade
 * in or out.  When its transition has finished, the test iterator is
 * incremented, so you should yield after calling.
 *
 * @param str
 *        The over-link will be set to this string or cleared if this is falsey.
 */
function setOverLinkWait(str) {
  dump("Setting over-link and waiting: " + str + "\n");

  let overLink = gURLBar._overLinkBox;
  let opacity = window.getComputedStyle(overLink, null).opacity;
  dump("Opacity is " + opacity + "\n");

  ok(str || opacity != 0,
     "Test assumption: either showing or if hiding, not already hidden");
  ok(!str || opacity != 1,
     "Test assumption: either hiding or if showing, not already shown");

  overLink.addEventListener("transitionend", function onTrans(event) {
    dump("transitionend received: " + (event.target == overLink) + " " +
         event.propertyName + "\n");
    if (event.target == overLink && event.propertyName == "opacity") {
      dump("target transitionend received\n");
      overLink.removeEventListener("transitionend", onTrans, false);
      cont();
    }
  }, false);
  gURLBar.setOverLink(str);
}

/**
 * Sets the over-link but unlike setOverLinkWait does not assume that a
 * transition will occur and therefore does not wait.
 *
 * @param str
 *        The over-link will be set to this string or cleared if this is falsey.
 */
function setOverLink(str) {
  dump("Setting over-link but not waiting: " + str + "\n");

  let overLink = gURLBar._overLinkBox;
  let opacity = window.getComputedStyle(overLink, null).opacity;
  dump("Opacity is " + opacity + "\n");

  ok(str || opacity == 0,
     "Test assumption: either showing or if hiding, already hidden");
  ok(!str || opacity == 1,
     "Test assumption: either hiding or if showing, already shown");

  gURLBar.setOverLink(str);
}

/**
 * Calls gURLBar._updateOverLink(str), which updates the over-link but does not
 * change its visibility.
 *
 * @param str
 *        The over-link will be set to this string.  Note that setting this to
 *        falsey doesn't make sense for this function.
 */
function updateOverLink(str) {
  gURLBar._updateOverLink(str);
}

/**
 * If the over-link is hidden, returns false.  Otherwise, hides the overlink and
 * returns true.  When the overlink is hidden, the test iterator is incremented,
 * so if this function returns true, you should yield after calling.
 *
 * @return True if you should yield and calling and false if not.
 */
function ensureOverLinkHidden() {
  dump("Ensuring over-link is hidden" + "\n");

  let overLink = gURLBar._overLinkBox;
  let opacity = window.getComputedStyle(overLink, null).opacity;
  dump("Opacity is " + opacity + "\n");

  if (opacity == 0)
    return false;

  setOverLinkWait("");
  return true;
}

/**
 * Asserts that the over-link host label is a given string.
 *
 * @param str
 *        The host label should be this string.
 */
function hostLabelIs(str) {
  let host = gURLBar._overLinkHostLabel;
  is(host.value, str, "Over-link host label should be correct");
}

/**
 * Asserts that the over-link path label is a given string.
 *
 * @param str
 *        The path label should be this string.
 */
function pathLabelIs(str) {
  let path = gURLBar._overLinkPathLabel;
  is(path.value, str, "Over-link path label should be correct");
}