layout/style/test/test_cascade.html

   1 <!DOCTYPE HTML>
   2 <!-- vim: set shiftwidth=4 tabstop=8 autoindent expandtab: -->
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   9    - http://www.mozilla.org/MPL/
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  12    - WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13    - for the specific language governing rights and limitations under the
  14    - License.
  15    -
  16    - The Original Code is test_cascade.html
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  18    - The Initial Developer of the Original Code is the Mozilla Foundation.
  19    - Portions created by the Initial Developer are Copyright (C) 2008
  20    - the Initial Developer. All Rights Reserved.
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  22    - Contributor(s):
  23    -   L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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  38 <html>
  39 <head>
  40   <title>Test for Author style sheet aspects of CSS cascading</title>
  41   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
  42   <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  43   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  44   <style type="text/css">
  45
  46   </style>
  47 </head>
  48 <body id="thebody">
  49 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
  50 <div class="content_class" id="content" style="position:relative"></div>
  51 <pre id="test">
  52 <script class="testbody" type="text/javascript">
  53
  54 /** Test for Author style sheet aspects of CSS cascading **/
  55
  56 var style_element = document.createElement("style");
  57 var style_contents = document.createTextNode("");
  58 style_element.appendChild(style_contents);
  59 document.getElementsByTagName("head")[0].appendChild(style_element);
  60
  61 var div = document.getElementById("content");
  62 var cs = window.getComputedStyle(div, "");
  63 var zindex = 0;
  64
  65 /**
  66  * Given the selectors |sel1| and |sel2|, in that order (the "order"
  67  * aspect of the cascade), with declarations that are !important if
  68  * |imp1|/|imp2| are true, assert that the one that wins in the
  69  * cascading order is given by |winning| (which must be either 1 or 2).
  70  */
  71 function do_test(sel1, imp1, sel2, imp2, winning) {
  72   var ind1 = ++zindex;
  73   var ind2 = ++zindex;
  74   style_contents.data =
  75     sel1 + " { z-index: " + ind1 + (imp1 ? "!important" :"") + " } " +
  76     sel2 + " { z-index: " + ind2 + (imp2 ? "!important" :"") + " } ";
  77   var result = cs.zIndex;
  78   is(result, (winning == 1) ? ind1 : ind2,
  79      "cascading of " + style_element.data);
  80 }
  81
  82 // Test order, and order combined with !important
  83 do_test("div", false, "div", false, 2);
  84 do_test("div", false, "div", true, 2);
  85 do_test("div", true, "div", false, 1);
  86 do_test("div", true, "div", true, 2);
  87
  88 // Test specificity on a single element
  89 do_test("div", false, "div.content_class", false, 2);
  90 do_test("div.content_class", false, "div", false, 1);
  91
  92 // Test specificity across elements
  93 do_test("body#thebody div", false, "body div.content_class", false, 1);
  94 do_test("body div.content_class", false, "body#thebody div", false, 2);
  95
  96 // Test specificity combined with !important
  97 do_test("div.content_class", false, "div", false, 1);
  98 do_test("div.content_class", true, "div", false, 1);
  99 do_test("div.content_class", false, "div", true, 2);
 100 do_test("div.content_class", true, "div", true, 1);
 101
 102 </script>
 103 </pre>
 104 </body>
 105 </html>
 106