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192 changes: 192 additions & 0 deletions OnScreenKeyboard.cs
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Original file line number Diff line number Diff line change
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using System;
using System.Collections.Generic;

namespace SoftWriters
{
class OnScreenKeyboard
{
private Dictionary<char, int> xPosition;
private Dictionary<char, int> yPosition;

public OnScreenKeyboard()
{
xPosition = new Dictionary<char, int>();
xPosition.Add('A', 0);
xPosition.Add('G', 0);
xPosition.Add('M', 0);
xPosition.Add('S', 0);
xPosition.Add('Y', 0);
xPosition.Add('5', 0);
xPosition.Add('B', 1);
xPosition.Add('H', 1);
xPosition.Add('N', 1);
xPosition.Add('T', 1);
xPosition.Add('Z', 1);
xPosition.Add('6', 1);
xPosition.Add('C', 2);
xPosition.Add('I', 2);
xPosition.Add('O', 2);
xPosition.Add('U', 2);
xPosition.Add('1', 2);
xPosition.Add('7', 2);
xPosition.Add('D', 3);
xPosition.Add('J', 3);
xPosition.Add('P', 3);
xPosition.Add('V', 3);
xPosition.Add('2', 3);
xPosition.Add('8', 3);
xPosition.Add('E', 4);
xPosition.Add('K', 4);
xPosition.Add('Q', 4);
xPosition.Add('W', 4);
xPosition.Add('3', 4);
xPosition.Add('9', 4);
xPosition.Add('F', 5);
xPosition.Add('L', 5);
xPosition.Add('R', 5);
xPosition.Add('X', 5);
xPosition.Add('4', 5);
xPosition.Add('0', 5);

yPosition = new Dictionary<char, int>();
yPosition.Add('A', 0);
yPosition.Add('B', 0);
yPosition.Add('C', 0);
yPosition.Add('D', 0);
yPosition.Add('E', 0);
yPosition.Add('F', 0);
yPosition.Add('G', 1);
yPosition.Add('H', 1);
yPosition.Add('I', 1);
yPosition.Add('J', 1);
yPosition.Add('K', 1);
yPosition.Add('L', 1);
yPosition.Add('M', 2);
yPosition.Add('N', 2);
yPosition.Add('O', 2);
yPosition.Add('P', 2);
yPosition.Add('Q', 2);
yPosition.Add('R', 2);
yPosition.Add('S', 3);
yPosition.Add('T', 3);
yPosition.Add('U', 3);
yPosition.Add('V', 3);
yPosition.Add('W', 3);
yPosition.Add('X', 3);
yPosition.Add('Y', 4);
yPosition.Add('Z', 4);
yPosition.Add('1', 4);
yPosition.Add('2', 4);
yPosition.Add('3', 4);
yPosition.Add('4', 4);
yPosition.Add('5', 5);
yPosition.Add('6', 5);
yPosition.Add('7', 5);
yPosition.Add('8', 5);
yPosition.Add('9', 5);
yPosition.Add('0', 5);
}

/// <summary>
/// Creates a dtring of specified number of steps in the specified direction.
/// </summary>
/// <param name="steps">Number of steps</param>
/// <param name="direction">Direction of travel</param>
/// <returns>String of moves</returns>
private string AddMoves(int steps, string direction)
{
string moves = "";
for (int i = 0; i < steps; i++)
{
moves += direction + ",";
}
return moves;
}

/// <summary>
/// Finds a path to each character in the word.
/// </summary>
/// <param name="word">The word to find a path for</param>
/// <returns>String containg a comma seperated list of moves</returns>
public string FindKeyPath(String word)
{
string path = ""; //string to return
int x = 0; //starting x position
int y = 0; //starting y position

//convert our word to all upper case because the x and y position dictionaries expect that
word = word.ToUpper();

foreach (char c in word)
{
//if something is in the path, add a comma to the end
//this is so we don't return a path with a comma on the end
if (path != "")
{
path += ",";
}

//if the current character is a space, add that to the path and continue, nothing else to do for this character
if (c.Equals(' '))
{
path += "S";
continue;
}

//find the x and y position of the character, put them in variables to make things easier to read
int newX = xPosition[c];
int newY = yPosition[c];

//check if the character is left, right, above, or below or current position, and make those moves
//if the character is on our current position, no moves are made

//the character is left of our current position
if (newX < x)
{
path += AddMoves(x - newX, "L");
}
//the character is right of our current position
else if (newX > x)
{
path += AddMoves(newX - x, "R");
}
//the character is above our current position
if (newY < y)
{
path += AddMoves(y - newY, "U");
}
//the character is below our current position
else if (newY > y)
{
path += AddMoves(newY - y, "D");
}

//the cursor is on the correct key, add # to the path to select it
path += "#";

//update our current x and y position to the new character
x = newX;
y = newY;
}

return path;
}

/// <summary>
/// Finds a path for each line in the specified file.
/// </summary>
/// <param name="FilePath">Path to file</param>
/// <returns>Array of paths</returns>
public string [] FindKeyPaths(String FilePath)
{
string[] lines = System.IO.File.ReadAllLines(FilePath);
string[] paths = new string[lines.Length];
for(int i=0; i<lines.Length; i++)
{
paths[i] = FindKeyPath(lines[i]);
}
return paths;
}

}
}