<%!
from django.utils.translation import ugettext as _
from django.core.urlresolvers import reverse
%>

<div class="calc-main">
  <button title="${_('Open Calculator')}" aria-controls="calculator_wrapper" aria-expanded="false" class="calc utility-control-button">
    <span class="utility-control-label sr">${_("Open Calculator")}</span>
  </button>

  <div id="calculator_wrapper">
    <form id="calculator">
      <div class="input-wrapper">
        <label for="calculator_input" class="label-calc-input sr">${_('Calculator Input')}</label>
        <input type="text" id="calculator_input" title="${_('Calculator Input Field')}" />

        <div class="help-wrapper">
          <p class="sr" id="hint-instructions">${_('Use the arrow keys to navigate the tips or use the tab key to return to the calculator')}</p>

          <a href="#" id="calculator_hint" aria-haspopup="true" aria-expanded="false" aria-controls="calculator_input_help" aria-describedby="hint-instructions"><span class="calc-hint sr">${_("Hints")}</span></a>
        </div>
      </div>

      <input type="submit" id="calculator_button" value="=" aria-label="${_('Calculate')}">
      <label for="calculator_output" class="calc-output-label sr">${_('Calculator Output')}</label>
      <input type="text" id="calculator_output" readonly />
    </form>
  </div>
</div>

<div id="calculator_input_help" class="calc-help-popup" aria-hidden="true">
  <ul>
    <li class="hint-item" id="hint-moreinfo">
        <p><span class="bold">${_("For detailed information, see {math_link_start}Entering Mathematical and Scientific Expressions{math_link_end} in the {guide_link_start}edX Guide for Students{guide_link_end}.").format(
          math_link_start='<a href="http://edx-guide-for-students.readthedocs.org/en/latest/SFD_mathformatting.html">',
          math_link_end='</a>',
          guide_link_start='<a href="http://edx-guide-for-students.readthedocs.org/en/latest/index.html">',
          guide_link_end='</a>',
        )}</span></p>
    </li>

    <li class="hint-item" id="hint-tips"><p><span class="bold">${_("Tips")}:</span> </p>
      <ul>
        <li class="hint-item" id="hint-paren"><p>${_("Use parentheses () to make expressions clear. You can use parentheses inside other parentheses.")}</p></li>
        <li class="hint-item" id="hint-spaces"><p>${_("Do not use spaces in expressions.")}</p></li>
        <li class="hint-item" id="hint-howto-constants"><p>${_("For constants, indicate multiplication explicitly (example: 5*c).")}</p></li>
        <li class="hint-item" id="hint-howto-maffixes"><p>${_("For affixes, type the number and affix without a space (example: 5c).")}</p></li>
        <li class="hint-item" id="hint-howto-functions"><p>${_("For functions, type the name of the function, then the expression in parentheses.")}</p></li>
      </ul>
    </li>

    <li class="hint-item" id="hint-list">
      <table class="calculator-input-help-table">
        <tbody>
          <tr>
            <th scope="col">${_("To Use")}</th>
            <th scope="col">${_("Type")}</th>
            <th scope="col">${_("Examples")}</th>
          </tr>
          <tr>
            <th scope="row">${_("Numbers")}</th>
            <td dir="auto">${_("Integers")}<br />
              ${_("Fractions")}<br />
              ${_("Decimals")}
            </td>
            <td dir="auto">2520<br />
              2/3<br />
              3.14, .98
            </td>
          </tr>
          <tr>
            ## Translators: This refers to mathematical operators such as `plus`, `minus`, `division` and others.
            <th scope="row">${_("Operators")}</th>
            <td dir="auto">
              ## Translators: Please do not translate mathematical symbols.
              ${_("+ - * / (add, subtract, multiply, divide)")}<br />

              ## Translators: Please do not translate mathematical symbols.
              ${_("^ (raise to a power)")}<br />

              ## Translators: Please do not translate mathematical symbols.
              ${_("|| (parallel resistors)")}
            </td>
            <td dir="auto">x+(2*y)/x-1
              x^(n+1)<br />
              v_IN+v_OUT<br />
              1||2
            </td>
          </tr>
          <tr>
            ## Translators: This refers to symbols that are mathematical constants, such as "i" (square root of -1)
            <th scope="row">${_("Constants")}</th>
            <td dir="auto">c, e, g, i, j, k, pi, q, T</td>
            <td dir="auto">20*c<br />
              418*T
            </td>
          </tr>
          <tr>
            ## Translators: This refers to symbols that appear at the end of a number, such as the percent sign (%) and metric affixes
            <th scope="row">${_("Affixes")}</th>
            <td dir="auto">${_("Percent sign (%) and metric affixes (d, c, m, u, n, p, k, M, G, T)")}</td>
            <td dir="auto">20%<br />
              20c<br />
              418T
            </td>
          </tr>
          <tr>
            ## Translators: This refers to basic mathematical functions such as "square root"
            <th scope="row">${_("Basic functions")}</th>
            <td dir="auto">abs, exp, fact or factorial, ln, log2, log10, sqrt</td>
            <td dir="auto">abs(x+y)<br />
              sqrt(x^2-y)
            </td>
          </tr>
          <tr>
            ## Translators: This refers to mathematical Sine, Cosine and Tan
            <th scope="row">${_("Trigonometric functions")}</th>
            <td dir="auto">sin, cos, tan, sec, csc, cot<br />
              arcsin, sinh, arcsinh, etc.<br />
            </td>
            <td dir="auto">sin(4x+y)<br />
              arccsch(4x+y)
            </td>
            <td dir="auto"></td>
          </tr>
          <tr>
            ## Translators: Please see http://en.wikipedia.org/wiki/Scientific_notation
            <th scope="row">${_("Scientific notation")}</th>
            ## Translators: 10^ is a mathematical symbol. Please do not translate.
            <td dir="auto">${_("10^ and the exponent")}</td>
            <td dir="auto">10^-9</td>
          </tr>
          <tr>
            ## Translators: this is part of scientific notation. Please see http://en.wikipedia.org/wiki/Scientific_notation#E_notation
            <th scope="row">${_("e notation")}</th>
            ## Translators: 1e is a mathematical symbol. Please do not translate.
            <td dir="auto">${_("1e and the exponent")}</td>
            <td dir="auto">1e-9</td>
          </tr>
        </tbody>
      </table>
    </li>
  </ul>
</div>
