Package ket.math.purpose.symbolicFunctions

Source Code of ket.math.purpose.symbolicFunctions.SymbolicFunctionFraction

/*
* Copyright (C) 2011  Alasdair C. Hamilton
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

package ket.math.purpose.symbolicFunctions;

import java.awt.*;
import java.util.*;

import ket.display.*;
import ket.display.box.Box;
import ket.display.box.BoxGap;
import ket.display.box.BoxGraphic;
import ket.display.box.BoxTools;
import ket.math.*;
import ket.math.purpose.SymbolicState;

/**
* A specific mathematical operation that acts on arguments in a case-specific
* way.
*/
public class SymbolicFunctionFraction extends SymbolicFunctionForm {

  @Override
  public String toLatex(Vector<Argument> args) {
    if (args.size()==2) {
      return "\\frac{"+args.get(0).toLatex()+"}{"+args.get(1).toLatex()+"}";
    } else {
      return super.toLatex(args);
    }
  }

  @Override
  public String toHTML(Vector<Argument> args) {
    // Not yet implemented. 
    if (args.size()!=2) {
      return super.toHTML(args);
    }
    return HTMLTools.toFraction(args.firstElement().toHTML(), args.lastElement().toHTML());
    /*-
    return
      "<SPAN class=\"fraction\">\n" +
      "<SPAN class=\"numerator\">" + numerator + "</SPAN>\n" +
      "<HR class=\"split\"/>\n" +
      "<SPAN class=\"denomonator\">" + denomonator + "</SPAN>\n" +
      "</SPAN>\n";
      */
  }

  @Override
  public Box toBox(Argument argument, long settings, ColourScheme colourScheme, Vector<Argument> args) {
    long[] childFlags = new long[args.size()];
    for (int i=0; i<args.size(); i++) {
      Argument a = args.get(i);
      if (a.getFunction()!=Function.FRACTION) {
        childFlags[i] = Box.SUPPRESS_BRACKETS;
      }
    }
    int minArgs = getArgLowerLimit(args.size());
    Vector<Box> boxArgs = BoxTools.padArgs(args, minArgs, colourScheme, childFlags);
    return this.toBox(argument, boxArgs, settings, colourScheme);
  }

  @Override
  public Box toBox(Argument argument, Vector<Box> boxArgs, long settings, ColourScheme colourScheme) {
    if (boxArgs.size()>2) {
      return super.toBox(argument, boxArgs, settings, colourScheme);
    }
    BoxGraphic bar = new BoxGraphic(argument, 0L, BoxGraphic.HORIZONTAL_LINE);
    Box above = new BoxGap(argument, 0L, bar, 0.0, 1.0, 0.0, 0.0);
    Box below = new BoxGap(argument, 0L, bar, 0.0, 1.0, 0.0, 0.0);
    boxArgs.add(1, above);
    boxArgs.add(2, bar);
    boxArgs.add(3, below);
    Box box = BoxTools.centredVerticalBoxList(argument, settings, boxArgs);
    bar.setProperty(Box.HORIZONTAL_STRETCH);
    return box;
  }
}
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