multiscripts-positions-expected.html

<!doctype html>

<html>

  <head>

    <title>positions of scripts</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <!-- Testing post subscript -->

    <p style="position: absolute; left: 0; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

          <none/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 15px; top: 10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing post superscript -->

    <p style="position: absolute; left: 100px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <none/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 115px; top: -10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing pre subscript -->

    <p style="position: absolute; left: 200px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mprescripts/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

          <none/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 195px; top: +10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing pre postscript -->

    <p style="position: absolute; left: 300px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mprescripts/>

          <none/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 295px; top: -10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing the leftmost pre subscript and rightmost post superscript -->

    <p style="position: absolute; left: 0; top: 100px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" depth="10px" mathbackground="orange"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

          <mprescripts/>

          <mspace width="10px" depth="10px" mathbackground="magenta"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="orange"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: -5px; top: 110px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <p style="position: absolute; left: 45px; top: 90px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing the leftmost pre superscript and rightmost post subscript -->

    <p style="position: absolute; left: 100px; top: 100px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="orange"/>

          <mspace width="10px" depth="10px" mathbackground="magenta"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mprescripts/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="magenta"/>

          <mspace width="10px" depth="10px" mathbackground="orange"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 95px; top: 90px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <p style="position: absolute; left: 145px; top: 110px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

  </body>

</html>

LayoutTests/mathml/presentation/multiscripts-positions.html

<!doctype html>

<html>

  <head>

    <title>positions of scripts</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <!-- This page contains several <mmultiscripts> elements. We place black squares at the position where we expect some red scripts to be. The reference page is the same with only the colors of these scripts changed. If the scripts are correctly placed, they will be covered by the black squares and thus the color difference is not perceptible. -->

    <!-- Testing post subscript -->

    <p style="position: absolute; left: 0; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" height="10px" mathbackground="red"/>

          <none/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 15px; top: 10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing post superscript -->

    <p style="position: absolute; left: 100px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <none/>

          <mspace width="10px" height="10px" mathbackground="red"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 115px; top: -10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing pre subscript -->

    <p style="position: absolute; left: 200px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mprescripts/>

          <mspace width="10px" height="10px" mathbackground="red"/>

          <none/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 195px; top: +10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing pre postscript -->

    <p style="position: absolute; left: 300px; top: 0;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mprescripts/>

          <none/>

          <mspace width="10px" height="10px" mathbackground="red"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 295px; top: -10px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing the leftmost pre subscript and rightmost post superscript -->

    <p style="position: absolute; left: 0; top: 100px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" depth="10px" mathbackground="orange"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="red"/>

          <mprescripts/>

          <mspace width="10px" depth="10px" mathbackground="red"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="orange"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: -5px; top: 110px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <p style="position: absolute; left: 45px; top: 90px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <!-- Testing the leftmost pre superscript and rightmost post subscript -->

    <p style="position: absolute; left: 100px; top: 100px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mmultiscripts>

          <mspace width="20px" height="10px" depth="10px" mathbackground="blue"/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="orange"/>

          <mspace width="10px" depth="10px" mathbackground="red"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

          <mprescripts/>

          <mspace width="10px" depth="10px" mathbackground="green"/>

          <mspace width="10px" height="10px" mathbackground="red"/>

          <mspace width="10px" depth="10px" mathbackground="orange"/>

          <mspace width="10px" height="10px" mathbackground="green"/>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute; left: 95px; top: 90px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

    <p style="position: absolute; left: 145px; top: 110px;">

      <math>

        <mspace height="50px" depth="50px"/>

        <mrow>

          <mspace width="20px" height="10px" depth="10px" mathbackground="black"/>

        </mrow>

      </math>

    </p>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-base-alignment-expected.html

<!doctype html>

<html>

  <head>

    <title>base alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <p style="position: absolute;">

      <math>

        <mspace height="10em" depth="10em"/>

        <mn mathcolor="red">0</mn>

        <msup><mn mathcolor="red">0</mn><mn>1</mn></msup>

        <msub><mn mathcolor="red">0</mn><mn>1</mn></msub>

        <msubsup><mn mathcolor="red">0</mn><mn>1</mn><mn>2</mn></msubsup>

        <mmultiscripts><mn mathcolor="red">0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts>

        <mmultiscripts>

          <mn mathcolor="red">0</mn>

          <mmultiscripts><mn>1</mn><mn>2</mn><none/></mmultiscripts>

          <none/>

        </mmultiscripts>

        <mmultiscripts>

          <mn mathcolor="red">0</mn>

          <none/>

          <mmultiscripts><mn>1</mn><none/><mn>2</mn></mmultiscripts>

        </mmultiscripts>

        <mmultiscripts>

          <mn mathcolor="red">0</mn>

          <mprescripts/>

          <mmultiscripts><mn>1</mn><mprescripts/><mn>2</mn><none/></mmultiscripts>

          <none/>

        </mmultiscripts>

        <mmultiscripts>

          <mn mathcolor="red">0</mn>

          <mprescripts/>

          <none/>

          <mmultiscripts><mn>1</mn><mprescripts/><none/><mn>2</mn></mmultiscripts>

        </mmultiscripts>

        <mmultiscripts>

          <mn mathcolor="red">0</mn>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mprescripts/>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute;">

      <math>

        <mspace height="10em" depth="10em"/>

        <mrow mathbackground="blue" style="border-top: blue solid 1px; border-bottom: blue solid 1px;">

          <mphantom>

            <mn>0000000000000000000000000000000000000000000</mn>

          </mphantom>

        </mrow>

      </math>

    </p>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-base-alignment.html

<!doctype html>

<html>

  <head>

    <title>base alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <!-- The bases of the outermost <mmultiscripts> elements should all be aligned and so covered by the blue rectangle. -->

    <p style="position: absolute;">

      <math>

        <mspace height="10em" depth="10em"/>

        <mn>0</mn>

        <msup><mn>0</mn><mn>1</mn></msup>

        <msub><mn>0</mn><mn>1</mn></msub>

        <msubsup><mn>0</mn><mn>1</mn><mn>2</mn></msubsup>

        <mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts>

        <mmultiscripts>

          <mn>0</mn>

          <mmultiscripts><mn>1</mn><mn>2</mn><none/></mmultiscripts>

          <none/>

        </mmultiscripts>

        <mmultiscripts>

          <mn>0</mn>

          <none/>

          <mmultiscripts><mn>1</mn><none/><mn>2</mn></mmultiscripts>

        </mmultiscripts>

        <mmultiscripts>

          <mn>0</mn>

          <mprescripts/>

          <mmultiscripts><mn>1</mn><mprescripts/><mn>2</mn><none/></mmultiscripts>

          <none/>

        </mmultiscripts>

        <mmultiscripts>

          <mn>0</mn>

          <mprescripts/>

          <none/>

          <mmultiscripts><mn>1</mn><mprescripts/><none/><mn>2</mn></mmultiscripts>

        </mmultiscripts>

        <mmultiscripts>

          <mn>0</mn>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mprescripts/>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

          <mmultiscripts>

            <mn>0</mn>

            <mn>1</mn><mn>2</mn>

            <mn>3</mn><mn>4</mn>

            <mprescripts/>

            <mn>5</mn><mn>6</mn>

            <mn>7</mn><mn>8</mn>

          </mmultiscripts>

        </mmultiscripts>

      </math>

    </p>

    <p style="position: absolute;">

      <math>

        <mspace height="10em" depth="10em"/>

        <mrow mathbackground="blue" style="border-top: blue solid 1px; border-bottom: blue solid 1px;">

          <mphantom>

            <mn>0000000000000000000000000000000000000000000</mn>

          </mphantom>

        </mrow>

      </math>

    </p>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-horizontal-alignment-expected.html

<!doctype html>

<html>

  <head>

    <title>horizontal alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <math style="position: absolute;">

      <mspace height="100px" depth="100px"/>

      <mmultiscripts>

        <mn>0</mn>

        <mspace width="10px" height="50px" mathbackground="green"/>

        <mspace width="10px" height="10px"/>

        <mspace width="10px" height="10px"/>

        <none/>

        <mprescripts/>

        <none/>

        <mspace width="10px" height="10px"/>

        <mspace width="10px" height="10px"/>

        <mspace width="10px" height="50px" mathbackground="green"/>

      </mmultiscripts>

    </math>

    <math style="position: absolute; top: -40px;">

      <mspace height="100px" depth="100px"/>

      <mspace width="200px" height="40px" depth="20px" mathbackground="black"/>

    </math>

    <math style="position: absolute; top: +40px;">

      <mspace height="100px" depth="100px"/>

      <mspace width="200px" height="20px" depth="40px" mathbackground="black"/>

    </math>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-horizontal-alignment.html

<!doctype html>

<html>

  <head>

    <title>horizontal alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <!-- The MathML recommendation does not specify horizontal alignment of scripts.  We align the bottom (respectively top) edge of the subscript (respectively superscript) with the bottom (respectively top) edge of the flex container. -->

    <math style="position: absolute;">

      <mspace height="100px" depth="100px"/>

      <mmultiscripts>

        <mn>0</mn>

        <mspace width="10px" height="50px" mathbackground="green"/>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mspace width="10px" height="10px" mathbackground="blue"/>

        <none/>

        <mprescripts/>

        <none/>

        <mspace width="10px" height="10px" mathbackground="blue"/>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mspace width="10px" height="50px" mathbackground="green"/>

      </mmultiscripts>

    </math>

    <!-- These black rectangles should hide the top/bottom of the <mmultiscripts> element. So the green and red scripts should not be visible -->

    <math style="position: absolute; top: -40px;">

      <mspace height="100px" depth="100px"/>

      <mspace width="200px" height="40px" depth="20px" mathbackground="black"/>

    </math>

    <math style="position: absolute; top: +40px;">

      <mspace height="100px" depth="100px"/>

      <mspace width="200px" height="20px" depth="40px" mathbackground="black"/>

    </math>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-vertical-alignment-expected.html

<!doctype html>

<html>

  <head>

    <title>vertical alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <math>

      <msubsup>

        <mn>0</mn>

        <mrow><mspace width="10px" height="10px" mathbackground="red"/><mspace width="10px" height="10px"/></mrow>

        <mspace width="20px" height="10px" mathbackground="blue"/>

      </msubsup>

      <msubsup>

        <mn>0</mn>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mrow><mspace width="10px" height="10px" mathbackground="red"/><mspace width="10px" height="10px"/></mrow>

      </msubsup>

      <mmultiscripts>

        <mn>0</mn>

        <mrow><mspace width="10px" height="10px" mathbackground="red"/><mspace width="10px" height="10px"/></mrow>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mrow><mspace width="10px" height="10px" mathbackground="red"/><mspace width="10px" height="10px"/></mrow>

        <mprescripts/>

        <mrow><mspace width="10px" height="10px"/><mspace width="10px" height="10px" mathbackground="red"/></mrow>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mrow><mspace width="10px" height="10px"/><mspace width="10px" height="10px" mathbackground="red"/></mrow>$

      </mmultiscripts>

    </math>

  </body>

</html>

LayoutTests/mathml/presentation/scripts-vertical-alignment.html

<!doctype html>

<html>

  <head>

    <title>vertical alignment</title>

    <meta charset="utf-8"/>

  </head>

  <body>

    <!-- The MathML recommendation does not specify vertical alignment of scripts. We right align prescripts and left align postscripts. See http://lists.w3.org/Archives/Public/www-math/2012Aug/0006.html -->

    <math>

      <msubsup>

        <mn>0</mn>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

      </msubsup>

      <msubsup>

        <mn>0</mn>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="10px" height="10px" mathbackground="red"/>

      </msubsup>

      <mmultiscripts>

        <mn>0</mn>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mprescripts/>

        <mspace width="10px" height="10px" mathbackground="red"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="20px" height="10px" mathbackground="blue"/>

        <mspace width="10px" height="10px" mathbackground="red"/>

      </mmultiscripts>

    </math>

  </body>

</html>

LayoutTests/mathml/scripts-addChild-expected.html

<!doctype html>

<html>

  <head>

    <title>MathML script elements: adding children</title>

    <style type="text/css">

      div { border: 1px solid; margin: .5em; }

    </style>

  </head>

  <body>

    <div id="test1">Test 1:

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

    </div>

    <div id="test2">Test 2:

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mprescripts/><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mprescripts/><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mprescripts/><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mprescripts/></mmultiscripts></math>

    </div>

    <div id="test3">Test 3:

      <math><mmultiscripts><mn>10</mn><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>11</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>12</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>13</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>14</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>15</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>16</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>17</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>18</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>19</mn></mmultiscripts></math>

    </div>

    <div id="test4">Test 4:

      <math><mmultiscripts><mprescripts/><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mprescripts/><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mprescripts/><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/></mmultiscripts></math>

    </div>

    <div id="test5">Test 5:

      <math><mmultiscripts><mn>10</mn><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>11</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>12</mn><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mn>13</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>14</mn><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>15</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mn>16</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>17</mn><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>18</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>19</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn><mn>20</mn></mmultiscripts></math>

    </div>

  </body>

</html>

LayoutTests/mathml/scripts-addChild.html

<!doctype html>

<html>

  <head>

    <title>MathML script elements: adding children</title>

    <!-- This test verifies insertion of children into an <mmultiscripts> element using DOM operations. It should not crash and should render the same as the equivalent static page. -->

    <style type="text/css">

      div { border: 1px solid; margin: .5em; }

    </style>

    <script type="text/javascript">

      var mathmlNS = "http://www.w3.org/1998/Math/MathML";

      function newMn(n)

      {

        var t = document.createTextNode(n.toString());

        var mn = document.createElementNS(mathmlNS, "mn");

        mn.appendChild(t);

        return mn;

      }

      function newPrescripts()

      {

        var mprescripts = document.createElementNS(mathmlNS, "mprescripts");

        return mprescripts;

      }

      function test1()

      {

        var test1content = document.getElementById("test1content");

        var mmultiscripts = document.getElementById("test1").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        // Insert in normal order

        for (var child = test1content.firstChild; child; child = child.nextSibling) {

          mmultiscripts[0].appendChild(child.cloneNode(true));

        }

        // Insert in reverse order

        for (var child = test1content.lastChild; child; child = child.previousSibling) {

          mmultiscripts[1].insertBefore(child.cloneNode(true), mmultiscripts[1].firstChild);

        }

      }

      function test2()

      {

        var mmultiscripts = document.getElementById("test2").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var childRef = mmultiscripts[i].firstChild;

          for (var j = 0; j < i; j++) childRef = childRef.nextSibling;

          mmultiscripts[i].insertBefore(newPrescripts(), childRef);

        }

       }

      function test3()

      {

        var mmultiscripts = document.getElementById("test3").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var childRef = mmultiscripts[i].firstChild;

          for (var j = 0; j < i; j++) childRef = childRef.nextSibling;

          mmultiscripts[i].insertBefore(newMn(10+i), childRef);

        }

       }

      function test4()

      {

        var mmultiscripts = document.getElementById("test4").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var childRef = mmultiscripts[i].firstChild;

          for (var j = 0; j < i; j++) childRef = childRef.nextSibling;

          mmultiscripts[i].insertBefore(newPrescripts(), childRef);

        }

       }

      function test5()

      {

        var mmultiscripts = document.getElementById("test5").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var childRef = mmultiscripts[i].firstChild;

          for (var j = 0; j < i; j++) childRef = childRef.nextSibling;

          mmultiscripts[i].insertBefore(newMn(10+i), childRef);

        }

       }

      function run()

      {

        test1();

        test2();

        test3();

        test4();

        test5();

      }

    </script>

  </head>

  <body onload="run()">

    <!-- Test 1: insert in normal and reverse order. -->

    <div style="display: none">

      <math id="test1content"><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></math>

    </div>

    <div id="test1">Test 1:

      <math><mmultiscripts></mmultiscripts></math>

      <math><mmultiscripts></mmultiscripts></math>

    </div>

    <!-- Test 2: insert an <mprescripts/> element. -->

    <div id="test2">Test 2:

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

    <!-- Test 3: insert an <mn> element. -->

    <div id="test3">Test 3:

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

    <!-- Test 4: insert an <mprescripts> element (different number of consecutive scripts) . -->

    <div id="test4">Test 4:

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

    <!-- Test 5: insert an <mn> element (different number of consecutive scripts) . -->

    <div id="test5">Test 5:

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>1</mn><mprescripts/><mn>2</mn><mn>3</mn><mprescripts/><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

  </body>

</html>

LayoutTests/mathml/scripts-removeChild-expected.html

<!doctype html>

<html>

  <head>

    <title>MathML script elements: removing children</title>

    <style type="text/css">

      div { border: 1px solid; margin: .5em; }

    </style>

  </head>

  <body>

    <div id="test1">Test 1:

    <math><mmultiscripts></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <div id="test2">Test 2:

    <math><mmultiscripts><mn>20</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <div id="test3">Test 3:

    <math><mmultiscripts><mn>20</mn><mn>30</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <div id="test4">Test 4:

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

    <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <div id="test5">Test 5:

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn></mmultiscripts></math>

    </div>

    <div id="test6">Test 6:

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mn>2</mn></mmultiscripts></math>

    </div>

    <div id="test7">Test 7:

      <math><mmultiscripts></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

    <div id="test8">Test 8:

      <math><mmultiscripts><mtext>BASE</mtext><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn></mmultiscripts></math>

    </div>

</body>

</html>

LayoutTests/mathml/scripts-removeChild.html

<!doctype html>

<html>

  <head>

    <title>MathML script elements: removing children</title>

    <!-- This test verifies removal of children from an <mmultiscripts> element using DOM operations. It should not crash and should render the same as the equivalent static page. -->

    <style type="text/css">

      div { border: 1px solid; margin: .5em; }

    </style>

    <script type="text/javascript">

      var mathmlNS = "http://www.w3.org/1998/Math/MathML";

      function testRemoveMPrescript(n)

      {

        // Test 1, 2, 3, 4: removing the <mprescripts/> element.

        var mmultiscripts = document.getElementById("test" + n).getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++)

          mmultiscripts[i].removeChild(mmultiscripts[i].getElementsByTagNameNS(mathmlNS, "mprescripts")[0]);

      }

      function test5()

      {

        // Test 5: removing the first duplicate <mprescripts/> element.

        var mmultiscripts = document.getElementById("test5").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++)

          mmultiscripts[i].removeChild(mmultiscripts[i].getElementsByTagNameNS(mathmlNS, "mprescripts")[1]);

      }

      function test6()

      {

        // Test 6: removing an extra child.

        var mmultiscripts = document.getElementById("test6").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var extra = mmultiscripts[i].getElementsByTagNameNS(mathmlNS, "mprescripts")[1].nextSibling;

          for (var j = 0; j < i; j++) extra = extra.nextSibling;

          mmultiscripts[i].removeChild(extra);

        }

      }

      function test7()

      {

        // Test 7: removing the base.

        var mmultiscripts = document.getElementById("test7").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var base = mmultiscripts[i].firstChild;

          mmultiscripts[i].removeChild(base);

        }

      }

      function test8()

      {

        // Test 8: removing a postscript/prescript

        var mmultiscripts = document.getElementById("test8").getElementsByTagNameNS(mathmlNS, "mmultiscripts");

        for (var i = 0; i < mmultiscripts.length; i++) {

          var script = mmultiscripts[i].getElementsByTagNameNS(mathmlNS, "mn")[i];

          mmultiscripts[i].removeChild(script);

        }

      }

      function update()

      {

        testRemoveMPrescript(1);

        testRemoveMPrescript(2);

        testRemoveMPrescript(3);

        testRemoveMPrescript(4);

        test5();

        test6();

        test7();

        test8();

      }

    </script>

  </head>

  <body onload="update()">

    <!-- Test 1: removing the <mprescripts/> element.

         (starting with no bases or postscripts) -->

    <div id="test1">Test 1:

      <math><mmultiscripts><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

      <math><mmultiscripts><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <!-- Test 2: removing the <mprescripts/> element.

         (starting with one base but no postscripts -->

    <div id="test2">Test 2:

      <math><mmultiscripts><mn>20</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <!-- Test 3: removing the <mprescripts/> element.

         (starting with one base but one postscript -->

    <div id="test3">Test 3:

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <!-- Test 4: removing the <mprescripts/> element.

         (starting with one base and two postscripts) -->

    <div id="test4">Test 4:

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>20</mn><mn>30</mn><mn>40</mn><mprescripts/><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mn>7</mn><mn>8</mn><mprescripts/><mn>9</mn><mn>10</mn></mmultiscripts></math>

    </div>

    <!-- Test 5: removing the first extra <mprescripts/> element. -->

    <div id="test5">Test 5:

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mprescripts/><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn></mmultiscripts></math>

    </div>

    <!-- Test 6: removing an extra child. -->

    <div id="test6">Test 6:

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mprescripts/><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

    </div>

    <!-- Test 7: removing the base. -->

    <div id="test7">Test 7:

      <math><mmultiscripts><mn>0</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>5</mn></mmultiscripts></math>

      <math><mmultiscripts><mn>0</mn><mprescripts/><mn>5</mn><mn>6</mn></mmultiscripts></math>

    </div>

    <!-- Test 8: removing a postscript/prescript. -->

    <div id="test8">Test 8:

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

      <math><mmultiscripts><mtext>BASE</mtext><mn>1</mn><mn>2</mn><mn>3</mn><mn>4</mn><mn>5</mn><mn>6</mn><mprescripts/><mn>7</mn><mn>8</mn><mn>9</mn><mn>10</mn><mn>11</mn><mn>12</mn></mmultiscripts></math>

    </div>

  </body>

</html>

LayoutTests/platform/mac/accessibility/mathml-multiscript-expected.txt

A 1 2  

A 1 2 3  

A 4 5  

A 4 5 6  

A 1 2 3 4 5 6  

A  

A 1 3 5 6

This tests checks that mmultiscript tags will create the correct accessibility math hierarchy.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

Source/WebCore/CMakeLists.txt

@@set(WebCore_SOURCES

    rendering/mathml/RenderMathMLRow.cpp

    rendering/mathml/RenderMathMLSpace.cpp

    rendering/mathml/RenderMathMLSquareRoot.cpp

2209 rendering/mathml/RenderMathMLS~~ubSu~~p.cpp

2209 rendering/mathml/RenderMathMLScripts.cpp

    rendering/mathml/RenderMathMLUnderOver.cpp

    rendering/shapes/PolygonShape.cpp

Source/WebCore/ChangeLog

2013-09-14  Frédéric Wang  <fred.wang@free.fr>

        Implement the mmultiscripts tag

        https://bugs.webkit.org/show_bug.cgi?id=99618

        Reviewed by NOBODY (OOPS!).

        Tests: mathml/invalid-scripts-crash.html

               mathml/presentation/multiscripts-equivalence.html

               mathml/presentation/multiscripts-noscripts.html

               mathml/presentation/multiscripts-positions.html

               mathml/presentation/scripts-base-alignment.html

               mathml/presentation/scripts-horizontal-alignment.html

               mathml/presentation/scripts-vertical-alignment.html

               mathml/scripts-addChild.html

               mathml/scripts-removeChild.html

        This relies on the existing msub/msup/msubsup code to implement the mmultiscripts tag. This also improves dynamic addition/removal of children for these MathML elements and adds a specific style for invalid children, so that they render like an merror tag. Finally, this fixes a bad memory access in the Accessibility render object of msubsup.

        * CMakeLists.txt:

        * GNUmakefile.list.am:

        * Target.pri:

        * WebCore.vcxproj/WebCore.vcxproj:

        * WebCore.vcxproj/WebCore.vcxproj.filters:

        * WebCore.xcodeproj/project.pbxproj:

        * accessibility/AccessibilityRenderObject.cpp:

        (WebCore::AccessibilityRenderObject::isMathSubscriptSuperscript):

        (WebCore::AccessibilityRenderObject::mathSuperscriptObject):

        * css/mathml.css:

        (mo, mrow, mfenced, mfrac, msub, msup, msubsup, mmultiscripts, mprescripts, none, munder, mover, munderover, msqrt, mroot):

        (mover > :last-child, munderover > :last-child):

        (msub > * + *, msup > * + *, msubsup > * + *, mmultiscripts > * + *, munder > * + *, mover > * + *, munderover > * + *):

        (merror, msub > * + * + *, msup > * + * + *, msubsup > * + * + * + *, msub > mprescripts, msup > mprescripts, msubsup > mprescripts, msub > none, msup > none, msubsup > none, mmultiscripts > mprescripts ~ mprescripts, mmultiscripts > mprescripts ~ mprescripts ~ *):

        * mathml/MathMLInlineContainerElement.cpp:

        (WebCore::MathMLInlineContainerElement::createRenderer):

        * mathml/mathtags.in:

        * rendering/mathml/RenderMathMLBlock.h:

        (WebCore::RenderMathMLBlock::isRenderMathMLScripts):

        (WebCore::RenderMathMLBlock::isRenderMathMLScriptsWrapper):

        * rendering/mathml/RenderMathMLScripts.cpp: Added.

        (WebCore::isMPrescripts):

        (WebCore::RenderMathMLScripts::RenderMathMLScripts):

        (WebCore::RenderMathMLScripts::base):

        (WebCore::RenderMathMLScripts::fixAnonymousStyleForSubSupPair):

        (WebCore::RenderMathMLScripts::fixAnonymousStyles):

        (WebCore::RenderMathMLScripts::addChildInternal):

        (WebCore::RenderMathMLScripts::removeChildInternal):

        (WebCore::RenderMathMLScripts::addChild):

        (WebCore::RenderMathMLScripts::removeChild):

        (WebCore::RenderMathMLScripts::styleDidChange):

        (WebCore::RenderMathMLScripts::unembellishedOperator):

        (WebCore::RenderMathMLScripts::layout):

        (WebCore::RenderMathMLScripts::firstLineBoxBaseline):

        (WebCore::RenderMathMLScriptsWrapper::createAnonymousWrapper):

        (WebCore::RenderMathMLScriptsWrapper::addChildInternal):

        (WebCore::RenderMathMLScriptsWrapper::addChild):

        (WebCore::RenderMathMLScriptsWrapper::removeChildInternal):

        (WebCore::RenderMathMLScriptsWrapper::removeChild):

        * rendering/mathml/RenderMathMLScripts.h: Added.

        (WebCore::RenderMathMLScriptsWrapper::RenderMathMLScriptsWrapper):

        (WebCore::RenderMathMLScriptsWrapper::renderName):

        (WebCore::RenderMathMLScriptsWrapper::isRenderMathMLScriptsWrapper):

        (WebCore::toRenderMathMLScriptsWrapper):

        (WebCore::RenderMathMLScripts::isRenderMathMLScripts):

        (WebCore::RenderMathMLScripts::renderName):

        (WebCore::toRenderMathMLScripts):

        * rendering/mathml/RenderMathMLSubSup.cpp: Removed.

        * rendering/mathml/RenderMathMLSubSup.h: Removed.

2013-09-13  Commit Queue  <commit-queue@webkit.org>

        Unreviewed, rolling out r155738.

Source/WebCore/GNUmakefile.list.am

@@webcore_sources += \

	Source/WebCore/rendering/mathml/RenderMathMLSpace.h \

	Source/WebCore/rendering/mathml/RenderMathMLSquareRoot.cpp \

	Source/WebCore/rendering/mathml/RenderMathMLSquareRoot.h \

4570 Source/WebCore/rendering/mathml/RenderMathMLS~~ubSu~~p.cpp \

4571 Source/WebCore/rendering/mathml/RenderMathMLS~~ubSu~~p.h \

4570 Source/WebCore/rendering/mathml/RenderMathMLScripts.cpp \

4571 Source/WebCore/rendering/mathml/RenderMathMLScripts.h \

	Source/WebCore/rendering/mathml/RenderMathMLUnderOver.cpp \

	Source/WebCore/rendering/mathml/RenderMathMLUnderOver.h \

	Source/WebCore/rendering/shapes/PolygonShape.cpp \

Source/WebCore/Target.pri

@@HEADERS += \

    rendering/mathml/RenderMathMLRow.h \

    rendering/mathml/RenderMathMLSpace.h \

    rendering/mathml/RenderMathMLSquareRoot.h \

2418 rendering/mathml/RenderMathMLS~~ubSu~~p.h \

2418 rendering/mathml/RenderMathMLScripts.h \

    rendering/mathml/RenderMathMLUnderOver.h \

    rendering/Pagination.h \

    rendering/PaintInfo.h \

@@enable?(MATHML) {

        rendering/mathml/RenderMathMLRow.cpp \

        rendering/mathml/RenderMathMLSpace.cpp \

        rendering/mathml/RenderMathMLSquareRoot.cpp \

3638 rendering/mathml/RenderMathMLS~~ubSu~~p.cpp \

3638 rendering/mathml/RenderMathMLScripts.cpp \

        rendering/mathml/RenderMathMLUnderOver.cpp

    ALL_IN_ONE_SOURCES +=

Source/WebCore/WebCore.vcxproj/WebCore.vcxproj

    <ClCompile Include="..\rendering\mathml\RenderMathMLRow.cpp" />

    <ClCompile Include="..\rendering\mathml\RenderMathMLSpace.cpp" />

    <ClCompile Include="..\rendering\mathml\RenderMathMLSquareRoot.cpp" />

11141 <ClCompile Include="..\rendering\mathml\RenderMathMLS~~ubSu~~p.cpp" />

11141 <ClCompile Include="..\rendering\mathml\RenderMathMLScripts.cpp" />

    <ClCompile Include="..\rendering\mathml\RenderMathMLUnderOver.cpp" />

    <ClCompile Include="..\rendering\style\BasicShapes.cpp" />

    <ClCompile Include="..\rendering\style\ContentData.cpp">

    <ClInclude Include="..\rendering\mathml\RenderMathMLRow.h" />

    <ClInclude Include="..\rendering\mathml\RenderMathMLSpace.h" />

    <ClInclude Include="..\rendering\mathml\RenderMathMLSquareRoot.h" />

20117 <ClInclude Include="..\rendering\mathml\RenderMathMLS~~ubSu~~p.h" />

20117 <ClInclude Include="..\rendering\mathml\RenderMathMLScripts.h" />

    <ClInclude Include="..\rendering\mathml\RenderMathMLUnderOver.h" />

    <ClInclude Include="..\rendering\style\BasicShapes.h" />

    <ClInclude Include="..\rendering\style\BorderData.h" />

Source/WebCore/WebCore.vcxproj/WebCore.vcxproj.filters

    <ClCompile Include="..\rendering\mathml\RenderMathMLSquareRoot.cpp">

      <Filter>rendering\mathml</Filter>

    </ClCompile>

2865 <ClCompile Include="..\rendering\mathml\RenderMathMLS~~ubSu~~p.cpp">

2865 <ClCompile Include="..\rendering\mathml\RenderMathMLScripts.cpp">

      <Filter>rendering\mathml</Filter>

    </ClCompile>

    <ClCompile Include="..\rendering\mathml\RenderMathMLUnderOver.cpp">

    <ClInclude Include="..\rendering\mathml\RenderMathMLSquareRoot.h">

      <Filter>rendering\mathml</Filter>

    </ClInclude>

9846 <ClInclude Include="..\rendering\mathml\RenderMathMLS~~ubSu~~p.h">

9846 <ClInclude Include="..\rendering\mathml\RenderMathMLScripts.h">

      <Filter>rendering\mathml</Filter>

    </ClInclude>

    <ClInclude Include="..\rendering\mathml\RenderMathMLUnderOver.h">

Source/WebCore/WebCore.xcodeproj/project.pbxproj

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				331FF67DE197B57393C46AA7 /* RenderMathMLSpace.h */,

				439046D112DA25E800AF80A2 /* RenderMathMLSquareRoot.cpp */,

				439046D212DA25E800AF80A2 /* RenderMathMLSquareRoot.h */,

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14421 439046D412DA25E800AF80A2 /* RenderMathMLS~~ubSu~~p.h */,

14420 439046D312DA25E800AF80A2 /* RenderMathMLScripts.cpp */,

14421 439046D412DA25E800AF80A2 /* RenderMathMLScripts.h */,

				439046D512DA25E800AF80A2 /* RenderMathMLUnderOver.cpp */,

				439046D612DA25E800AF80A2 /* RenderMathMLUnderOver.h */,

			);

				439046E212DA25E800AF80A2 /* RenderMathMLRoot.h in Headers */,

				439046E412DA25E800AF80A2 /* RenderMathMLRow.h in Headers */,

				439046E612DA25E800AF80A2 /* RenderMathMLSquareRoot.h in Headers */,

23608 439046E812DA25E800AF80A2 /* RenderMathMLS~~ubSu~~p.h in Headers */,

23608 439046E812DA25E800AF80A2 /* RenderMathMLScripts.h in Headers */,

				439046EA12DA25E800AF80A2 /* RenderMathMLUnderOver.h in Headers */,

				E4C279590CF9741900E97B98 /* RenderMedia.h in Headers */,

				DEBCCDD216646E8200A452E1 /* RenderMediaControlElements.h in Headers */,

				439046E312DA25E800AF80A2 /* RenderMathMLRow.cpp in Sources */,

				5B7A208D2E12979B4AE19DE6 /* RenderMathMLSpace.cpp in Sources */,

				439046E512DA25E800AF80A2 /* RenderMathMLSquareRoot.cpp in Sources */,

26805 439046E712DA25E800AF80A2 /* RenderMathMLS~~ubSu~~p.cpp in Sources */,

26805 439046E712DA25E800AF80A2 /* RenderMathMLScripts.cpp in Sources */,

				439046E912DA25E800AF80A2 /* RenderMathMLUnderOver.cpp in Sources */,

				E4C279580CF9741900E97B98 /* RenderMedia.cpp in Sources */,

				DE49B309165F2FE10010338D /* RenderMediaControlElements.cpp in Sources */,

Source/WebCore/accessibility/AccessibilityRenderObject.cpp

@@bool AccessibilityRenderObject::isMathSubscriptSuperscript() const

    if (!m_renderer || !m_renderer->isRenderMathMLBlock())

        return false;

3437 return toRenderMathMLBlock(m_renderer)->isRenderMathMLS~~ubSu~~p();

3437 return toRenderMathMLBlock(m_renderer)->isRenderMathMLScripts() && !isMathMultiscript();

}

bool AccessibilityRenderObject::isMathRow() const

@@AccessibilityObject* AccessibilityRenderObject::mathSuperscriptObject()

        return 0;

    AccessibilityChildrenVector children = this->children();

    if (children.size() < 2)

        return 0;

    if (node()->hasTagName(MathMLNames::msupTag))

    unsigned count = children.size();

    if (count >= 2 && node()->hasTagName(MathMLNames::msupTag))

36973696 return children[1].get();

3698 if (node()->hasTagName(MathMLNames::msubsupTag))

3697

3698 if (count >= 3 && node()->hasTagName(MathMLNames::msubsupTag))

        return children[2].get();

    return 0;

Source/WebCore/css/mathml.css

@@math[display="block"] {

    -webkit-margin-after: 1em;

}

35 mo, mrow, mfenced, mfrac, msub, msup, msubsup, munder, mover, munderover, msqrt, mroot {

35mo, mrow, mfenced, mfrac, msub, msup, msubsup, mmultiscripts, mprescripts, none, munder, mover, munderover, msqrt, mroot {

    display: -webkit-inline-flex !important;

}

msup {

    -webkit-align-items: flex-start;

}

msub {

    -webkit-align-items: flex-end;

}

math, mrow, mfenced, msqrt, mroot {

    -webkit-align-items: baseline;

}

@@mfrac {

    -webkit-margin-end: 1px;

}

88 ~~msubsup > :last-child,~~ mover > :last-child, munderover > :last-child {

80mover > :last-child, munderover > :last-child {

    -webkit-order: -1;

}

92 msub > * + *, msup > * + *, msubsup > * + *, munder > * + *, mover > * + *, munderover > * + * {

84msub > * + *, msup > * + *, msubsup > * + *, mmultiscripts > * + *, munder > * + *, mover > * + *, munderover > * + * {

    font-size: 0.75em; /* FIXME: MathML standard is 0.71em */

}

@@mphantom {

    visibility: hidden;

}

172 merror {

/* This is a special style for erroneous markup:

  - <merror> element.

  - extra children in script elements.

  - <mprescripts/> and <none/> elements in msub/msup/msubsup.

 */

merror, msub > * + * + *, msup > * + * + *, msubsup > * + * + * + *, msub > mprescripts, msup > mprescripts, msubsup > mprescripts, msub > none, msup > none, msubsup > none, mmultiscripts > mprescripts ~ mprescripts, mmultiscripts > mprescripts ~ mprescripts ~ * {

    outline: solid thin red;

    font-weight: bold;

    font-family: sans-serif;

Source/WebCore/mathml/MathMLInlineContainerElement.cpp

#include "RenderMathMLFraction.h"

#include "RenderMathMLRoot.h"

#include "RenderMathMLRow.h"

39#include "RenderMathMLScripts.h"

3940#include "RenderMathMLSquareRoot.h"

40 #include "RenderMathMLSubSup.h"

#include "RenderMathMLUnderOver.h"

namespace WebCore {

@@RenderObject* MathMLInlineContainerElement::createRenderer(RenderArena* arena, R

    if (hasLocalName(mrowTag))

        return new (arena) RenderMathMLRow(this);

    if (hasLocalName(msubTag))

62 return new (arena) RenderMathMLS~~ubSu~~p(this);

62 return new (arena) RenderMathMLScripts(this);

6363 if (hasLocalName(msupTag))

64 return new (arena) RenderMathMLS~~ubSu~~p(this);

64 return new (arena) RenderMathMLScripts(this);

6565 if (hasLocalName(msubsupTag))

66 return new (arena) RenderMathMLSubSup(this);

        return new (arena) RenderMathMLScripts(this);

    if (hasLocalName(mmultiscriptsTag))

        return new (arena) RenderMathMLScripts(this);

    if (hasLocalName(moverTag))

        return new (arena) RenderMathMLUnderOver(this);

    if (hasLocalName(munderTag))

Source/WebCore/mathml/mathtags.in

@@mtable interfaceName=MathMLInlineContainerElement

mtr interfaceName=MathMLElement

mtd interfaceName=MathMLElement

mmultiscripts interfaceName=MathMLInlineContainerElement

27 mprescripts interfaceName=MathMLElement

28 none interfaceName=MathMLElement

27mprescripts interfaceName=MathMLInlineContainerElement

28none interfaceName=MathMLInlineContainerElement

#if 0 // Curently only for MathMLNames used by HTMLTreeBuilder.

ms

Source/WebCore/rendering/mathml/RenderMathMLBlock.h

@@public:

    virtual bool isRenderMathMLRoot() const { return false; }

    virtual bool isRenderMathMLSpace() const { return false; }

    virtual bool isRenderMathMLSquareRoot() const { return false; }

57 virtual bool isRenderMathMLSubSup() const { return false; }

57 virtual bool isRenderMathMLScripts() const { return false; }

58 virtual bool isRenderMathMLScriptsWrapper() const { return false; }

    virtual bool isRenderMathMLUnderOver() const { return false; }

    // MathML defines an "embellished operator" as roughly an <mo> that may have subscripts,

Source/WebCore/rendering/mathml/RenderMathMLScripts.cpp

/*

 * Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.

 * Copyright (C) 2013 The MathJax Consortium.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#if ENABLE(MATHML)

#include "RenderMathMLScripts.h"

#include "MathMLNames.h"

namespace WebCore {

using namespace MathMLNames;

// RenderMathMLScripts implements various MathML elements drawing scripts attached to a base. For valid MathML elements, the structure of the render tree should be:

//

// - msub, msup, msubsup: BaseWrapper SubSupPairWrapper

// - mmultiscripts: BaseWrapper SubSupPairWrapper* (mprescripts SubSupPairWrapper*)*

//

// where BaseWrapper and SubSupPairWrapper do not contain any <mprescripts/> children. In addition, BaseWrapper must have one child and SubSupPairWrapper must have either one child (msub, msup) or two children (msubsup, mmultiscripts).

//

// In order to accept invalid markup and to handle the script elements consistently and uniformly, we will use a more general structure that encompasses both valid and invalid elements:

//

// BaseWrapper SubSupPairWrapper* (mprescripts SubSupPairWrapper*)*

//

// where BaseWrapper can now be empty and SubSupPairWrapper can now have one or two elements.

//

static bool isPrescript(RenderObject* renderObject)

{

    ASSERT(renderObject);

    return renderObject->node() && renderObject->node()->hasTagName(MathMLNames::mprescriptsTag);

}

RenderMathMLScripts::RenderMathMLScripts(Element* element)

    : RenderMathMLBlock(element)

    , m_baseWrapper(0)

{

    // Determine what kind of sub/sup expression we have by element name

    if (element->hasLocalName(MathMLNames::msubTag))

        m_kind = Sub;

    else if (element->hasLocalName(MathMLNames::msupTag))

        m_kind = Super;

    else if (element->hasLocalName(MathMLNames::msubsupTag))

        m_kind = SubSup;

    else {

        ASSERT(element->hasLocalName(MathMLNames::mmultiscriptsTag));

        m_kind = Multiscripts;

    }

}

RenderBoxModelObject* RenderMathMLScripts::base() const

{

    if (!m_baseWrapper)

        return 0;

    RenderObject* base = m_baseWrapper->firstChild();

    if (!base || !base->isBoxModelObject())

        return 0;

    return toRenderBoxModelObject(base);

}

void RenderMathMLScripts::fixAnonymousStyleForSubSupPair(RenderObject* subSupPair, bool isPostScript)

{

    ASSERT(subSupPair && subSupPair->style()->refCount() == 1);

    RenderStyle* scriptsStyle = subSupPair->style();

    // subSup pairs are drawn in column from bottom (subscript) to top (superscript).

    scriptsStyle->setFlexDirection(FlowColumnReverse);

    // The MathML specification does not specify horizontal alignment of

    // scripts. We align the bottom (respectively top) edge of the subscript

    // (respectively superscript) with the bottom (respectively top) edge of

    // the flex container. Note that for valid <msub> and <msup> elements, the

    // subSupPair should actually have only one script.

    scriptsStyle->setJustifyContent(m_kind == Sub ? JustifyFlexStart : m_kind == Super ? JustifyFlexEnd : JustifySpaceBetween);

    // The MathML specification does not specify vertical alignment of scripts.

    // Let's right align prescripts and left align postscripts.

    // See http://lists.w3.org/Archives/Public/www-math/2012Aug/0006.html

    scriptsStyle->setAlignItems(isPostScript ? AlignFlexStart : AlignFlexEnd);

    // We set the order property so that the prescripts are drawn before the base.

    scriptsStyle->setOrder(isPostScript ? 0 : -1);

    // We set this wrapper's font-size for its line-height.

    LayoutUnit scriptSize = static_cast<int>(0.75 * style()->fontSize());

    scriptsStyle->setFontSize(scriptSize);

}

void RenderMathMLScripts::fixAnonymousStyles()

{

    // We set the base wrapper's style so that baseHeight in layout() will be an unstretched height.

    ASSERT(m_baseWrapper && m_baseWrapper->style()->hasOneRef());

    m_baseWrapper->style()->setAlignSelf(AlignFlexStart);

    // This sets the style for postscript pairs.

    RenderObject* subSupPair = m_baseWrapper;

    for (subSupPair = subSupPair->nextSibling(); subSupPair && !isPrescript(subSupPair); subSupPair = subSupPair->nextSibling())

        fixAnonymousStyleForSubSupPair(subSupPair, true);

    if (subSupPair && m_kind == Multiscripts) {

        // This sets the style for prescript pairs.

        for (subSupPair = subSupPair->nextSibling(); subSupPair && !isPrescript(subSupPair); subSupPair = subSupPair->nextSibling())

            fixAnonymousStyleForSubSupPair(subSupPair, false);

    }

    // This resets style for extra subSup pairs.

    for (; subSupPair; subSupPair = subSupPair->nextSibling()) {

        if (!isPrescript(subSupPair)) {

            ASSERT(subSupPair && subSupPair->style()->refCount() == 1);

            RenderStyle* scriptsStyle = subSupPair->style();

            scriptsStyle->setFlexDirection(FlowRow);

            scriptsStyle->setJustifyContent(JustifyFlexStart);

            scriptsStyle->setAlignItems(AlignCenter);

            scriptsStyle->setOrder(0);

            scriptsStyle->setFontSize(style()->fontSize());

        }

    }

}

void RenderMathMLScripts::addChildInternal(bool doNotRestructure, RenderObject* child, RenderObject* beforeChild)

{

    if (doNotRestructure) {

        RenderMathMLBlock::addChild(child, beforeChild);

        return;

    }

    if (beforeChild) {

        // beforeChild may be a grandchild, so we call the addChild function of the corresponding wrapper instead.

        RenderObject* parent = beforeChild->parent();

        if (parent != this) {

            RenderMathMLScriptsWrapper* wrapper = toRenderMathMLScriptsWrapper(parent);

            wrapper->addChildInternal(false, child, beforeChild);

            return;

        }

    }

    if (beforeChild == m_baseWrapper) {

        // This is like inserting the child at the beginning of the base wrapper.

        m_baseWrapper->addChildInternal(false, child, m_baseWrapper->firstChild());

        return;

    }

    if (isPrescript(child)) {

        // The new child becomes an <mprescripts/> separator.

        RenderMathMLBlock::addChild(child, beforeChild);

        return;

    }

    if (!beforeChild || isPrescript(beforeChild)) {

        // We are at the end of a sequence of subSup pairs.

        RenderMathMLBlock* previousSibling = toRenderMathMLBlock(beforeChild ? beforeChild->previousSibling() : lastChild());

        if (previousSibling && previousSibling->isRenderMathMLScriptsWrapper()) {

            RenderMathMLScriptsWrapper* wrapper = toRenderMathMLScriptsWrapper(previousSibling);

            if ((wrapper->m_kind == RenderMathMLScriptsWrapper::Base && wrapper->isEmpty()) || (wrapper->m_kind == RenderMathMLScriptsWrapper::SubSupPair && !wrapper->firstChild()->nextSibling())) {

                // The previous sibling is either an empty base or a SubSup pair with a single child so we can insert the new child into that wrapper.

                wrapper->addChildInternal(true, child);

                return;

            }

        }

        // Otherwise we create a new subSupPair to store the new child.

        RenderMathMLScriptsWrapper* subSupPair = RenderMathMLScriptsWrapper::createAnonymousWrapper(this, RenderMathMLScriptsWrapper::SubSupPair);

        subSupPair->addChildInternal(true, child);

        RenderMathMLBlock::addChild(subSupPair, beforeChild);

        return;

    }

    // beforeChild is a subSup pair. This is like inserting the new child at the beginning of the subSup wrapper.

    RenderMathMLScriptsWrapper* wrapper = toRenderMathMLScriptsWrapper(beforeChild);

    ASSERT(wrapper->m_kind == RenderMathMLScriptsWrapper::SubSupPair);

    ASSERT(!(m_baseWrapper->isEmpty() && m_baseWrapper->nextSibling() == beforeChild));

    wrapper->addChildInternal(false, child, wrapper->firstChild());

}

void RenderMathMLScripts::removeChildInternal(bool doNotRestructure, RenderObject* child)

{

    if (doNotRestructure) {

        RenderMathMLBlock::removeChild(child);

        return;

    }

    ASSERT(isPrescript(child));

    RenderObject* previousSibling = child->previousSibling();

    RenderObject* nextSibling = child->nextSibling();

    ASSERT(previousSibling);

    if (nextSibling && !isPrescript(previousSibling) && !isPrescript(nextSibling)) {

        RenderMathMLScriptsWrapper* previousWrapper = toRenderMathMLScriptsWrapper(previousSibling);

        RenderMathMLScriptsWrapper* nextWrapper = toRenderMathMLScriptsWrapper(nextSibling);

        ASSERT(nextWrapper->m_kind == RenderMathMLScriptsWrapper::SubSupPair && !nextWrapper->isEmpty());

        if ((previousWrapper->m_kind == RenderMathMLScriptsWrapper::Base && previousWrapper->isEmpty()) || (previousWrapper->m_kind == RenderMathMLScriptsWrapper::SubSupPair && !previousWrapper->firstChild()->nextSibling())) {

            RenderObject* script = nextWrapper->firstChild();

            nextWrapper->removeChildInternal(false, script);

            previousWrapper->addChildInternal(true, script);

        }

    }

    RenderMathMLBlock::removeChild(child);

}

void RenderMathMLScripts::addChild(RenderObject* child, RenderObject* beforeChild)

{

    if (isEmpty()) {

        m_baseWrapper = RenderMathMLScriptsWrapper::createAnonymousWrapper(this, RenderMathMLScriptsWrapper::Base);

        RenderMathMLBlock::addChild(m_baseWrapper);

    }

    addChildInternal(false, child, beforeChild);

    fixAnonymousStyles();

}

void RenderMathMLScripts::removeChild(RenderObject* child)

{

    if (beingDestroyed() || documentBeingDestroyed()) {

        // The renderer is being destroyed so we remove the child normally.

        RenderMathMLBlock::removeChild(child);

        return;

    }

    removeChildInternal(false, child);

    fixAnonymousStyles();

}

void RenderMathMLScripts::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)

{

    RenderMathMLBlock::styleDidChange(diff, oldStyle);

    if (!isEmpty())

        fixAnonymousStyles();

}

RenderMathMLOperator* RenderMathMLScripts::unembellishedOperator()

{

    RenderBoxModelObject* base = this->base();

    if (!base || !base->isRenderMathMLBlock())

        return 0;

    return toRenderMathMLBlock(base)->unembellishedOperator();

}

void RenderMathMLScripts::layout()

{

    RenderMathMLBlock::layout();

    if (!m_baseWrapper)

        return;

    RenderBox* base = m_baseWrapper->firstChildBox();

    if (!base)

        return;

    // Our layout rules include: Don't let the superscript go below the "axis" (half x-height above the

    // baseline), or the subscript above the axis. Also, don't let the superscript's top edge be

    // below the base's top edge, or the subscript's bottom edge above the base's bottom edge.

    //

    // FIXME: Check any subscriptshift or superscriptshift attributes, and maybe use more sophisticated

    // heuristics from TeX or elsewhere. See https://bugs.webkit.org/show_bug.cgi?id=79274#c5.

    LayoutUnit baseHeight = base->logicalHeight();

    LayoutUnit baseBaseline = base->firstLineBoxBaseline();

    if (baseBaseline == -1)

        baseBaseline = baseHeight;

    LayoutUnit axis = style()->fontMetrics().xHeight() / 2;

    int fontSize = style()->fontSize();

    ASSERT(m_baseWrapper->style()->hasOneRef());

    bool needsSecondLayout = false;

    LayoutUnit topPadding = 0;

    LayoutUnit bottomPadding = 0;

    bool isPostScript = true;

    RenderMathMLBlock* subSupPair = toRenderMathMLBlock(m_baseWrapper->nextSibling());

    for (; subSupPair; subSupPair = toRenderMathMLBlock(subSupPair->nextSibling())) {

        // We skip the base and <mprescripts/> elements.

        if (isPrescript(subSupPair)) {

            if (!isPostScript)

                break;

            isPostScript = false;

            continue;

        }

        if (RenderBox* superscript = m_kind == Sub ? 0 : subSupPair->lastChildBox()) {

            LayoutUnit superscriptHeight = superscript->logicalHeight();

            LayoutUnit superscriptBaseline = superscript->firstLineBoxBaseline();

            if (superscriptBaseline == -1)

                superscriptBaseline = superscriptHeight;

            LayoutUnit minBaseline = max<LayoutUnit>(fontSize / 3 + 1 + superscriptBaseline, superscriptHeight + axis);

            topPadding = max<LayoutUnit>(topPadding, minBaseline - baseBaseline);

        }

        if (RenderBox* subscript = m_kind == Super ? 0 : subSupPair->firstChildBox()) {

            LayoutUnit subscriptHeight = subscript->logicalHeight();

            LayoutUnit subscriptBaseline = subscript->firstLineBoxBaseline();

            if (subscriptBaseline == -1)

                subscriptBaseline = subscriptHeight;

            LayoutUnit baseExtendUnderBaseline = baseHeight - baseBaseline;

            LayoutUnit subscriptUnderItsBaseline = subscriptHeight - subscriptBaseline;

            LayoutUnit minExtendUnderBaseline = max<LayoutUnit>(fontSize / 5 + 1 + subscriptUnderItsBaseline, subscriptHeight - axis);

            bottomPadding = max<LayoutUnit>(bottomPadding, minExtendUnderBaseline - baseExtendUnderBaseline);

        }

    }

    Length newPadding(topPadding, Fixed);

    if (newPadding != m_baseWrapper->style()->paddingTop()) {

        m_baseWrapper->style()->setPaddingTop(newPadding);

        needsSecondLayout = true;

    }

    newPadding = Length(bottomPadding, Fixed);

    if (newPadding != m_baseWrapper->style()->paddingBottom()) {

        m_baseWrapper->style()->setPaddingBottom(newPadding);

        needsSecondLayout = true;

    }

    if (!needsSecondLayout)

        return;

    setNeedsLayout(true, MarkOnlyThis);

    m_baseWrapper->setChildNeedsLayout(true, MarkOnlyThis);

    RenderMathMLBlock::layout();

}

int RenderMathMLScripts::firstLineBoxBaseline() const

{

    if (m_baseWrapper) {

        LayoutUnit baseline = m_baseWrapper->firstLineBoxBaseline();

        if (baseline != -1)

            return baseline;

    }

    return RenderMathMLBlock::firstLineBoxBaseline();

}

RenderMathMLScriptsWrapper* RenderMathMLScriptsWrapper::createAnonymousWrapper(RenderMathMLScripts* renderObject, WrapperType type)

{

    RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(renderObject->style(), FLEX);

    RenderMathMLScriptsWrapper* newBlock = new (renderObject->renderArena()) RenderMathMLScriptsWrapper(0, type);

    newBlock->setDocumentForAnonymous(&renderObject->document());

    newBlock->setStyle(newStyle.release());

    return newBlock;

}

void RenderMathMLScriptsWrapper::addChildInternal(bool doNotRestructure, RenderObject* child, RenderObject* beforeChild)

{

    if (doNotRestructure) {

        RenderMathMLBlock::addChild(child, beforeChild);

        return;

    }

    RenderMathMLScripts* parentNode = toRenderMathMLScripts(parent());

    if (m_kind == Base) {

        RenderObject* sibling = nextSibling();

        if (!isEmpty() && !beforeChild) {

            // This is like inserting the child after the base wrapper.

            parentNode->addChildInternal(false, sibling);

            return;

        }

        // The old base (if any) becomes a script ; the new child becomes either the base or an <mprescripts> separator.

        RenderObject* oldBase = firstChild();

        if (oldBase)

            RenderMathMLBlock::removeChild(oldBase);

        if (isPrescript(child))

            parentNode->addChildInternal(true, child, sibling);

        else

            RenderMathMLBlock::addChild(child);

        if (oldBase)

            parentNode->addChildInternal(false, oldBase, sibling);

        return;

    }

    if (isPrescript(child)) {

        // We insert an <mprescripts> element.

        if (!beforeChild)

            parentNode->addChildInternal(true, child, nextSibling());

        else if (beforeChild == firstChild())

            parentNode->addChildInternal(true, child, this);

        else {

            // We insert the <mprescripts> in the middle of a subSup pair so we must split that pair.

            RenderObject* sibling = nextSibling();

            parentNode->removeChildInternal(true, this);

            parentNode->addChildInternal(true, child, sibling);

            RenderObject* script = firstChild();

            RenderMathMLBlock::removeChild(script);

            parentNode->addChildInternal(false, script, child);

            script = beforeChild;

            RenderMathMLBlock::removeChild(script);

            parentNode->addChildInternal(false, script, sibling);

            destroy();

        }

        return;

    }

    // We first move to the last subSup pair in the curent sequence of scripts.

    RenderMathMLScriptsWrapper* subSupPair = this;

    while (subSupPair->nextSibling() && !isPrescript(subSupPair->nextSibling()))

        subSupPair = toRenderMathMLScriptsWrapper(subSupPair->nextSibling());

    if (subSupPair->firstChild()->nextSibling()) {

        // The last pair has two children so we need to create a new pair to leave room for the new child.

        RenderMathMLScriptsWrapper* newPair = createAnonymousWrapper(parentNode, RenderMathMLScriptsWrapper::SubSupPair);

        parentNode->addChildInternal(true, newPair, subSupPair->nextSibling());

        subSupPair = newPair;

    }

    // We shift the successors in the current sequence of scripts.

    for (RenderObject* previousSibling = subSupPair->previousSibling(); subSupPair != this; previousSibling = previousSibling->previousSibling()) {

        RenderMathMLScriptsWrapper* previousSubSupPair = toRenderMathMLScriptsWrapper(previousSibling);

        RenderObject* script = previousSubSupPair->lastChild();

        previousSubSupPair->removeChildInternal(true, script);

        subSupPair->addChildInternal(true, script, subSupPair->firstChild());

        subSupPair = toRenderMathMLScriptsWrapper(previousSibling);

    }

    // This subSup pair now contain one element which is either beforeChild or the script that was before. Hence we can insert the new child before of after that element.

    RenderMathMLBlock::addChild(child, firstChild() == beforeChild ? beforeChild : 0);

}

void RenderMathMLScriptsWrapper::addChild(RenderObject* child, RenderObject* beforeChild)

{

    RenderMathMLScripts* parentNode = toRenderMathMLScripts(parent());

    addChildInternal(false, child, beforeChild);

    parentNode->fixAnonymousStyles();

}

void RenderMathMLScriptsWrapper::removeChildInternal(bool doNotRestructure, RenderObject* child)

{

    if (doNotRestructure) {

        RenderMathMLBlock::removeChild(child);

        return;

    }

    RenderMathMLScripts* parentNode = toRenderMathMLScripts(parent());

    if (m_kind == Base) {

        // We remove the child from the base wrapper.

        RenderObject* sibling = nextSibling();

        RenderMathMLBlock::removeChild(child);

        if (sibling && !isPrescript(sibling)) {

            // If there are postscripts, the first one becomes the base.

            RenderMathMLScriptsWrapper* wrapper = toRenderMathMLScriptsWrapper(sibling);

            RenderObject* script = wrapper->firstChild();

            wrapper->removeChildInternal(false, script);

            RenderMathMLBlock::addChild(script);

        }

        return;

    }

    // We remove the child and shift the successors in the current sequence of scripts.

    RenderMathMLBlock::removeChild(child);

    RenderMathMLScriptsWrapper* subSupPair = this;

    for (RenderObject* nextSibling = subSupPair->nextSibling(); nextSibling && !isPrescript(nextSibling); nextSibling = nextSibling->nextSibling()) {

        RenderMathMLScriptsWrapper* nextSubSupPair = toRenderMathMLScriptsWrapper(nextSibling);

        RenderObject* script = nextSubSupPair->firstChild();

        nextSubSupPair->removeChildInternal(true, script);

        subSupPair->addChildInternal(true, script);

        subSupPair = toRenderMathMLScriptsWrapper(nextSibling);

    }

    // We remove the last subSup pair if it became empty.

    if (subSupPair->isEmpty()) {

        parentNode->removeChildInternal(true, subSupPair);

        subSupPair->destroy();

    }

}

void RenderMathMLScriptsWrapper::removeChild(RenderObject* child)

{

    if (beingDestroyed() || documentBeingDestroyed()) {

        // The renderer is being destroyed so we remove the child normally.

        RenderMathMLBlock::removeChild(child);

        return;

    }

    RenderMathMLScripts* parentNode = toRenderMathMLScripts(parent());

    removeChildInternal(false, child);

    parentNode->fixAnonymousStyles();

}

}    

#endif // ENABLE(MATHML)

Source/WebCore/rendering/mathml/RenderMathMLScripts.h

/*

 * Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.

 * Copyright (C) 2013 The MathJax Consortium.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef RenderMathMLScripts_h

#define RenderMathMLScripts_h

#if ENABLE(MATHML)

#include "RenderMathMLBlock.h"

namespace WebCore {

class RenderMathMLScripts;

class RenderMathMLScriptsWrapper : public RenderMathMLBlock {

friend class RenderMathMLScripts;

public:

    enum WrapperType { Base, SubSupPair };

    RenderMathMLScriptsWrapper(Element* element, WrapperType kind) :

    RenderMathMLBlock(element), m_kind(kind) { };

    virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;

    virtual void removeChild(RenderObject*) OVERRIDE;

private:

    static RenderMathMLScriptsWrapper* createAnonymousWrapper(RenderMathMLScripts* renderObject, WrapperType);

    void addChildInternal(bool normalInsertion, RenderObject* child, RenderObject* beforeChild = 0);

    void removeChildInternal(bool normalRemoval, RenderObject* child);

    virtual const char* renderName() const { return (m_kind == Base ? "Base Wrapper" : "SubSupPair Wrapper"); }

    virtual bool isRenderMathMLScriptsWrapper() const OVERRIDE FINAL { return true; }

    RenderMathMLScripts* parentMathMLScripts();

    WrapperType m_kind;

};

inline RenderMathMLScriptsWrapper* toRenderMathMLScriptsWrapper(RenderMathMLBlock* block)

{

    ASSERT_WITH_SECURITY_IMPLICATION(!block || block->isRenderMathMLScriptsWrapper());

    return static_cast<RenderMathMLScriptsWrapper*>(block);

}

inline const RenderMathMLScriptsWrapper* toRenderMathMLScriptsWrapper(const RenderMathMLBlock* block)

{

    ASSERT_WITH_SECURITY_IMPLICATION(!block || block->isRenderMathMLScriptsWrapper());

    return static_cast<const RenderMathMLScriptsWrapper*>(block);

}

inline RenderMathMLScriptsWrapper* toRenderMathMLScriptsWrapper(RenderObject* object)

{

    return toRenderMathMLScriptsWrapper(toRenderMathMLBlock(object));

}

inline const RenderMathMLScriptsWrapper* toRenderMathMLScriptsWrapper(const RenderObject* object)

{

    return toRenderMathMLScriptsWrapper(toRenderMathMLBlock(object));

}

// This will catch anyone doing an unnecessary cast.

void toRenderMathMLScriptsWrapper(const RenderMathMLScriptsWrapper*);

// Render a base with scripts.

class RenderMathMLScripts : public RenderMathMLBlock {

friend class RenderMathMLScriptsWrapper;

public:

    RenderMathMLScripts(Element*);

    virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;

    virtual void removeChild(RenderObject*) OVERRIDE;

    virtual RenderMathMLOperator* unembellishedOperator();

    virtual int firstLineBoxBaseline() const OVERRIDE;

protected:

    virtual void layout();

private:

    void addChildInternal(bool normalInsertion, RenderObject* child, RenderObject* beforeChild = 0);

    void removeChildInternal(bool normalRemoval, RenderObject* child);

    virtual bool isRenderMathMLScripts() const OVERRIDE { return true; }

    void fixAnonymousStyleForSubSupPair(RenderObject* subSupPair, bool isPostScript);

    void fixAnonymousStyles();

    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;

    virtual const char* renderName() const { return "RenderMathMLScripts"; }

    // Omit our subscript and/or superscript. This may return 0 for a non-MathML base (which

    // won't occur in valid MathML).

    RenderBoxModelObject* base() const;

    enum ScriptsType { Sub, Super, SubSup, Multiscripts };

    ScriptsType m_kind;

    RenderMathMLScriptsWrapper* m_baseWrapper;

};

inline RenderMathMLScripts* toRenderMathMLScripts(RenderMathMLBlock* block)

{

    ASSERT_WITH_SECURITY_IMPLICATION(!block || block->isRenderMathMLScripts());

    return static_cast<RenderMathMLScripts*>(block);

}

inline const RenderMathMLScripts* toRenderMathMLScripts(const RenderMathMLBlock* block)

{

    ASSERT_WITH_SECURITY_IMPLICATION(!block || block->isRenderMathMLScripts());

    return static_cast<const RenderMathMLScripts*>(block);

}

inline RenderMathMLScripts* toRenderMathMLScripts(RenderObject* object)

{

    return toRenderMathMLScripts(toRenderMathMLBlock(object));

}

inline const RenderMathMLScripts* toRenderMathMLScripts(const RenderObject* object)

{

    return toRenderMathMLScripts(toRenderMathMLBlock(object));

}

// This will catch anyone doing an unnecessary cast.

void toRenderMathMLScripts(const RenderMathMLScripts*);

}

#endif // ENABLE(MATHML)

#endif // RenderMathMLScripts_h

Source/WebCore/rendering/mathml/RenderMathMLSubSup.cpp

/*

 * Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#if ENABLE(MATHML)

#include "RenderMathMLSubSup.h"

#include "MathMLNames.h"

namespace WebCore {

using namespace MathMLNames;

RenderMathMLSubSup::RenderMathMLSubSup(Element* element) 

    : RenderMathMLBlock(element)

    , m_scripts(0)

{

    // Determine what kind of sub/sup expression we have by element name

    if (element->hasLocalName(MathMLNames::msubTag))

        m_kind = Sub;

    else if (element->hasLocalName(MathMLNames::msupTag))

        m_kind = Super;

    else {

        ASSERT(element->hasLocalName(MathMLNames::msubsupTag));

        m_kind = SubSup;

    }

}

RenderBoxModelObject* RenderMathMLSubSup::base() const

{

    RenderObject* baseWrapper = firstChild();

    if (!baseWrapper)

        return 0;

    RenderObject* base = baseWrapper->firstChild();

    if (!base || !base->isBoxModelObject())

        return 0;

    return toRenderBoxModelObject(base);

}

void RenderMathMLSubSup::fixAnonymousStyles()

{

    // Set the base wrapper's style so that baseHeight in layout() will be an unstretched height.

    ASSERT(firstChild() && firstChild()->style()->refCount() == 1);

    firstChild()->style()->setAlignSelf(AlignFlexStart);

    ASSERT(m_scripts && m_scripts->style()->refCount() == 1);

    RenderStyle* scriptsStyle = m_scripts->style();

    scriptsStyle->setFlexDirection(FlowColumn);

    scriptsStyle->setJustifyContent(m_kind == Sub ? JustifyFlexEnd : m_kind == Super ? JustifyFlexStart : JustifySpaceBetween);

    // Set this wrapper's font-size for its line-height & baseline position, for its children.

    scriptsStyle->setFontSize(static_cast<int>(0.75 * style()->fontSize()));

}

// FIXME: Handle arbitrary addChild/removeChild correctly throughout MathML.

void RenderMathMLSubSup::addChild(RenderObject* child, RenderObject* beforeChild)

{

    if (isEmpty()) {

        RenderMathMLBlock* baseWrapper = createAnonymousMathMLBlock();

        RenderMathMLBlock::addChild(baseWrapper);

        m_scripts = createAnonymousMathMLBlock();

        RenderMathMLBlock::addChild(m_scripts);

        fixAnonymousStyles();

    }

    if (firstChild()->isEmpty())

        firstChild()->addChild(child);

    else

        m_scripts->addChild(child, beforeChild && beforeChild->parent() == m_scripts ? beforeChild : 0);

}

void RenderMathMLSubSup::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)

{

    RenderMathMLBlock::styleDidChange(diff, oldStyle);

    if (!isEmpty())

        fixAnonymousStyles();

}

RenderMathMLOperator* RenderMathMLSubSup::unembellishedOperator()

{

    RenderBoxModelObject* base = this->base();

    if (!base || !base->isRenderMathMLBlock())

        return 0;

    return toRenderMathMLBlock(base)->unembellishedOperator();

}

void RenderMathMLSubSup::layout()

{

    RenderMathMLBlock::layout();

    RenderMathMLBlock* baseWrapper = toRenderMathMLBlock(firstChild());

    if (!baseWrapper || !m_scripts)

        return;

    RenderBox* base = baseWrapper->firstChildBox();

    if (!base)

        return;

    // Our layout rules include: Don't let the superscript go below the "axis" (half x-height above the

    // baseline), or the subscript above the axis. Also, don't let the superscript's top edge be

    // below the base's top edge, or the subscript's bottom edge above the base's bottom edge.

    //

    // FIXME: Check any subscriptshift or superscriptshift attributes, and maybe use more sophisticated

    // heuristics from TeX or elsewhere. See https://bugs.webkit.org/show_bug.cgi?id=79274#c5.

    LayoutUnit baseHeight = base->logicalHeight();

    LayoutUnit baseBaseline = base->firstLineBoxBaseline();

    if (baseBaseline == -1)

        baseBaseline = baseHeight;

    LayoutUnit axis = style()->fontMetrics().xHeight() / 2;

    int fontSize = style()->fontSize();

    ASSERT(baseWrapper->style()->hasOneRef());

    bool needsSecondLayout = false;

    if (RenderBox* superscript = m_kind == Sub ? 0 : m_scripts->lastChildBox()) {

        LayoutUnit superscriptHeight = superscript->logicalHeight();

        LayoutUnit superscriptBaseline = superscript->firstLineBoxBaseline();

        if (superscriptBaseline == -1)

            superscriptBaseline = superscriptHeight;

        LayoutUnit minBaseline = max<LayoutUnit>(fontSize / 3 + 1 + superscriptBaseline, superscriptHeight + axis);

        Length newPadding = Length(max<LayoutUnit>(minBaseline - baseBaseline, 0), Fixed);

        if (newPadding != baseWrapper->style()->paddingTop()) {

            baseWrapper->style()->setPaddingTop(newPadding);

            needsSecondLayout = true;

        }

    }

    if (RenderBox* subscript = m_kind == Super ? 0 : m_scripts->firstChildBox()) {

        LayoutUnit subscriptHeight = subscript->logicalHeight();

        LayoutUnit subscriptBaseline = subscript->firstLineBoxBaseline();

        if (subscriptBaseline == -1)

            subscriptBaseline = subscriptHeight;

        LayoutUnit baseExtendUnderBaseline = baseHeight - baseBaseline;

        LayoutUnit subscriptUnderItsBaseline = subscriptHeight - subscriptBaseline;

        LayoutUnit minExtendUnderBaseline = max<LayoutUnit>(fontSize / 5 + 1 + subscriptUnderItsBaseline, subscriptHeight - axis);

        Length newPadding = Length(max<LayoutUnit>(minExtendUnderBaseline - baseExtendUnderBaseline, 0), Fixed);

        if (newPadding != baseWrapper->style()->paddingBottom()) {

            baseWrapper->style()->setPaddingBottom(newPadding);

            needsSecondLayout = true;

        }

    }

    if (!needsSecondLayout)

        return;

    setNeedsLayout(true, MarkOnlyThis);

    baseWrapper->setChildNeedsLayout(true, MarkOnlyThis);

    RenderMathMLBlock::layout();

}

}    

#endif // ENABLE(MATHML)

LayoutTests/ChangeLog

LayoutTests/TestExpectations

LayoutTests/mathml/invalid-scripts-crash-expected.txt

LayoutTests/mathml/invalid-scripts-crash.html

LayoutTests/mathml/presentation/multiscripts-equivalence-expected.html

LayoutTests/mathml/presentation/multiscripts-equivalence.html

LayoutTests/mathml/presentation/multiscripts-noscripts-expected.html

LayoutTests/mathml/presentation/multiscripts-noscripts.html