third_party/WebKit/LayoutTests/fast/forms/textarea-selection-preservation.html

   1 <html>
   2 <head>
   3 <script src="../../resources/js-test.js"></script>
   4 </head>
   5 <body>
   6 <p>This tests for problems where we'd lose the selection in a textarea when making style and value changes.</p>
   7 <div id="console"></div>
   8 <form id="form"><textarea id="ta">abc123
   9 </textarea></form>
  10 <script type="text/javascript">
  11     var ta = document.getElementById('ta');
  12     debug("- default value");
  13     shouldBe('ta.selectionStart', '0');
  14     shouldBe('ta.selectionEnd', '0');
  15     debug("- set selectionStart/End");
  16     ta.selectionStart = 3;
  17     ta.selectionEnd = 4;
  18     shouldBe('ta.selectionStart', '3');
  19     shouldBe('ta.selectionEnd', '4');
  20     debug("- add background style");
  21     ta.setAttribute("style", "background-color: yellow");
  22     shouldBe('ta.selectionStart', '3');
  23     shouldBe('ta.selectionEnd', '4');
  24     debug("- set value to same value");
  25     ta.value = "abc123\n";
  26     shouldBe('ta.selectionStart', '3');
  27     shouldBe('ta.selectionEnd', '4');
  28     debug("- set value to a different value");
  29     ta.value = "abc123";
  30     shouldBe('ta.selectionStart', '6');
  31     shouldBe('ta.selectionEnd', '6');
  32     debug("- set selection so we can test again without a trailing newline");
  33     ta.selectionStart = 3;
  34     ta.selectionEnd = 4;
  35     ta.removeAttribute("style");
  36     shouldBe('ta.selectionStart', '3');
  37     shouldBe('ta.selectionEnd', '4');
  38     debug("- add background style");
  39     ta.setAttribute("style", "background-color: yellow");
  40     shouldBe('ta.selectionStart', '3');
  41     shouldBe('ta.selectionEnd', '4');
  42     debug("- set value to same value");
  43     ta.value = "abc123";
  44     shouldBe('ta.selectionStart', '3');
  45     shouldBe('ta.selectionEnd', '4');
  46
  47     debug("- reset form");
  48     form.reset();
  49     shouldBe('ta.selectionStart', '7');
  50     shouldBe('ta.selectionEnd', '7');
  51
  52     debug("- set new defaultValue");
  53     ta.defaultValue = 'abc123456';
  54     shouldBe('ta.selectionStart', '9');
  55     shouldBe('ta.selectionEnd', '9');
  56
  57     debug("- set same defaultValue");
  58     ta.setSelectionRange(2, 3);
  59     ta.defaultValue = 'abc123456';
  60     shouldBe('ta.selectionStart', '9');
  61     shouldBe('ta.selectionEnd', '9');
  62
  63     debug("- append a text node");
  64     ta.appendChild(document.createTextNode('foo'));
  65     shouldBe('ta.selectionStart', '12');
  66     shouldBe('ta.selectionEnd', '12');
  67
  68     debug("- append a empty text node");
  69     ta.setSelectionRange(2, 3);
  70     ta.appendChild(document.createTextNode(''));
  71     shouldBe('ta.selectionStart', '12');
  72     shouldBe('ta.selectionEnd', '12');
  73 </script>
  74 </body>
  75 </html>