/*
 * Copyright(c) 2011
 *     OJC Technologies
 *     all rights reserved
 * @author: Jake Smith
 */

function doKeyAction(event) {
    try {
        if (cursor.isPlaced()) {
            handleKeyEvent(event);
        }
    } catch (err) {
        alert("ERROR\n" + err);
    }
    return false;
}

function handleKeyEvent(event) {
    var c, keyPressed;
    keyPressed = event.keyCode;
    event.preventDefault();
    event.stopPropagation();
    if (keyPressed == Key.SHIFT || 
        keyPressed == Key.CONTROL || 
        keyPressed == Key.ALT || 
        keyPressed == Key.CAPSLOCK || 
        keyPressed == Key.NUMLOCK) {
        // do nothing 
    } else if (keyPressed == Key.BACKSPACE) {
        cursor.doBackspace();
    } else if (keyPressed == Key.DELETE) {
        cursor.doDelete();
    } else if (keyPressed == Key.LEFT_ARROW) {
        cursor.shiftLeft();
    } else if (keyPressed == Key.RIGHT_ARROW) {
        cursor.shiftRight();
    } else {
        if (keyPressed == Key.SPACEBAR) {
            c = " "; // space
        } else if (keyPressed == Key.TAB) {
            c = "\t";
        } else if (keyPressed == Key.ENTER) {
            c = "\n";
        } else if (keyPressed >= 65 && keyPressed <= 90) { // character (a-z)
            c = AlphaTable.getCharFromIndex(keyPressed, event);
        } else if (keyPressed >= 48 && keyPressed <= 57) { // number/symbol
            c = NumSymTable.getCharFromIndex(keyPressed, event);
        } else {
            c = getNotConstantKeyCode(event); // usually puncuation and the like
        }
        if ( c == null) {
            throw new Error("null character being inserted");
        } else {
            cursor.insertCharacter(c);
        }
    }
}

function getNotConstantKeyCode(event) {
    var browser, version, os, c;
    browser = BrowserDetect.browser;
    if (browser == "Explorer" || browser == "Chrome" || browser == "Safari") {
        c = ieKeyCode(event);
    } else if (browser == "Firefox") {
        c = mozillaKeyCode(event);
    } else if (browser == "Opera") {
        version = BrowserDetect.version;
        os = BrowserDetect.OS;
        if (version >= 9.5) {
            c = mozillaKeyCode(event);
        } else if (os == "Windows") {
            if(version == 7) {
                c = mozillaKeyCode(event);
            } else if (version >= 8 && version <= 9.27) {
                c = operaKeyCode(event);
            }
        }
    } else {
        alert("You have an unsupported browser for the inline editor.\n" 
            + "The editor cannot safely interpret the key you pressed");
    }
    return c;
}

function ieKeyCode(event) {
    var i, key, table, c;
    key = event.keyCode;
    table = (event.shiftKey) ? OtherTable.ieShiftTable : OtherTable.ieTable;
    for (i = 0; i < table.length; i += 1) {
        if (key == table[i].code) {
            return table[i].value;
        }
    }
    return null;
}

function mozillaKeyCode(event) {
    var i, key, table;
    key = event.keyCode;
    table = (event.shiftKey) ? OtherTable.mozShiftTable : OtherTable.mozTable;
    for (i = 0; i < table.length; i += 1) {
        if (key == table[i].code) {
            return table[i].value;
        }
    }
    return null;
}

function operaKeyCode(event) {
    var i, key, table;
    key = event.keyCode;
    table = (event.shiftKey) ? OtherTable.operaShiftTable : OtherTable.operaTable;
    for (i = 0; i < table.length; i += 1) {
        if (key == table[i].code) {
            return table[i].value;
        }
    }
    return null;
}

var Key = {
    BACKSPACE: 8,
    TAB: 9,
    ENTER: 13,
    SHIFT: 16,
    CONTROL: 17,
    ALT: 18,
    CAPSLOCK: 20,
    ESCAPE: 27,
    SPACEBAR: 32,
    LEFT_ARROW: 37,
    UP_ARROW: 38,
    RIGHT_ARROW: 39,
    DOWN_ARROW: 40,
    DELETE: 46,
    NUMLOCK: 144
}

var AlphaTable = {
    
    getCharFromIndex: function (whichKey, event) {
        var table, i;
        table = (event.shiftKey) ? this.capsTable : this.lowerTable;
        for (i = 0; i < table.length; i += 1) {
            if (table[i].index == whichKey) {
                return table[i].value;
            }
        }
        throw new Error("no valid character found in table");
    },
    
    lowerTable: [
    {
        index: 65,
        value: 'a'
    },
    {
        index: 66,
        value: 'b'
    },
    {
        index: 67,
        value: 'c'
    },
    {
        index: 68,
        value: 'd'
    },
    {
        index: 69,
        value: 'e'
    },
    {
        index: 70,
        value: 'f'
    },
    {
        index: 71,
        value: 'g'
    },
    {
        index: 72,
        value: 'h'
    },
    {
        index: 73,
        value: 'i'
    },
    {
        index: 74,
        value: 'j'
    },
    {
        index: 75,
        value: 'k'
    },
    {
        index: 76,
        value: 'l'
    },
    {
        index: 77,
        value: 'm'
    },
    {
        index: 78,
        value: 'n'
    },
    {
        index: 79,
        value: 'o'
    },
    {
        index: 80,
        value: 'p'
    },
    {
        index: 81,
        value: 'q'
    },
    {
        index: 82,
        value: 'r'
    },
    {
        index: 83,
        value: 's'
    },
    {
        index: 84,
        value: 't'
    },
    {
        index: 85,
        value: 'u'
    },
    {
        index: 86,
        value: 'v'
    },
    {
        index: 87,
        value: 'w'
    },
    {
        index: 88,
        value: 'x'
    },
    {
        index: 89,
        value: 'y'
    },
    {
        index: 90,
        value: 'z'
    }
    ],
    
    capsTable: [
    {
        index: 65,
        value: 'A'
    },
    {
        index: 66,
        value: 'B'
    },
    {
        index: 67,
        value: 'C'
    },
    {
        index: 68,
        value: 'D'
    },
    {
        index: 69,
        value: 'E'
    },
    {
        index: 70,
        value: 'F'
    },
    {
        index: 71,
        value: 'G'
    },
    {
        index: 72,
        value: 'H'
    },
    {
        index: 73,
        value: 'I'
    },
    {
        index: 74,
        value: 'J'
    },
    {
        index: 75,
        value: 'K'
    },
    {
        index: 76,
        value: 'L'
    },
    {
        index: 77,
        value: 'M'
    },
    {
        index: 78,
        value: 'N'
    },
    {
        index: 79,
        value: 'O'
    },
    {
        index: 80,
        value: 'P'
    },
    {
        index: 81,
        value: 'Q'
    },
    {
        index: 82,
        value: 'R'
    },
    {
        index: 83,
        value: 'S'
    },
    {
        index: 84,
        value: 'T'
    },
    {
        index: 85,
        value: 'U'
    },
    {
        index: 86,
        value: 'V'
    },
    {
        index: 87,
        value: 'W'
    },
    {
        index: 88,
        value: 'X'
    },
    {
        index: 89,
        value: 'Y'
    },
    {
        index: 90,
        value: 'Z'
    }
    ]
};

var NumSymTable = {
    
    getCharFromIndex: function (whichKey, event) {
        var table, i;
        table = (event.shiftKey) ? this.symTable : this.charTable;
        for (i = 0; i < table.length; i += 1) {
            if (table[i].index == whichKey) {
                return table[i].value;
            }
        }
        throw new Error("no valid character found in table");
    },

    charTable: [
    {
        index: 48,
        value: "0"
    },
    {
        index: 49,
        value: "1"
    },
    {
        index: 50,
        value: "2"
    },
    {
        index: 51,
        value: "3"
    },
    {
        index: 52,
        value: "4"
    },
    {
        index: 53,
        value: "5"
    },
    {
        index: 54,
        value: "6"
    },
    {
        index: 55,
        value: "7"
    },
    {
        index: 56,
        value: "8"
    },
    {
        index: 57,
        value: "9"
    }
    ],
    
    symTable: [
    {
        index: 48,
        value: ")"
    },
    {
        index: 49,
        value: "!"
    },
    {
        index: 50,
        value: "@"
    },
    {
        index: 51,
        value: "#"
    },
    {
        index: 52,
        value: "$"
    },
    {
        index: 53,
        value: "%"
 
    },
    {
        index: 54,
        value: "^"
    },
    {
        index: 55,
        value: "&"
    },
    {
        index: 56,
        value: "*"
    },
    {
        index: 57,
        value: "("
    }
    ]
};

var OtherTable = {
    
    mozTable: [
    {
        code: 59,
        value: ';'
    },
    {
        code: 61,
        value: '='
    },
    {
        code: 188,
        value: ','
    },
    {
        code: 109,
        value: '-'
    },
    {
        code: 190,
        value: '.'
    },
    {
        code: 191,
        value: '/'
    },
    {
        code: 192,
        value: '`'
    },
    {
        code: 219,
        value: '['
    },
    {
        code: 220,
        value: '\\'
    },
    {
        code: 221,
        value: ']'
    },
    {
        code: 222,
        value: '\''
    }
    ],
    
    ieTable: [
    {
        code: 186,
        value: ';'
    },
    {
        code: 187,
        value: '='
    },
    {
        code: 188,
        value: ','
    },
    {
        code: 189,
        value: '-'
    },
    {
        code: 190,
        value: '.'
    },
    {
        code: 191,
        value: '/'
    },
    {
        code: 192,
        value: '`'
    },
    {
        code: 219,
        value: '['
    },
    {
        code: 220,
        value: '\\'
    },
    {
        code: 221,
        value: ']'
    },
    {
        code: 222,
        value: '\''
    }
    ],
    
    operaTable: [
    {
        code: 59,
        value: ';'
    },
    {
        code: 61,
        value: '='
    },
    {
        code: 44,
        value: ','
    },
    {
        code: 45,
        value: '-'
    },
    {
        code: 46,
        value: '.'
    },
    {
        code: 47,
        value: '/'
    },
    {
        code: 96,
        value: '`'
    },
    {
        code: 91,
        value: '['
    },
    {
        code: 92,
        value: '\\'
    },
    {
        code: 93,
        value: ']'
    },
    {
        code: 39,
        value: '\''
    }
    ],
    
    mozShiftTable: [
    {
        code: 59,
        value: ':'
    },
    {
        code: 61,
        value: '+'
    },
    {
        code: 188,
        value: '<'
    },
    {
        code: 109,
        value: '_'
    },
    {
        code: 190,
        value: '>'
    },
    {
        code: 191,
        value: '?'
    },
    {
        code: 192,
        value: '~'
    },
    {
        code: 219,
        value: '{'
    },
    {
        code: 220,
        value: '|'
    },
    {
        code: 221,
        value: '}'
    },
    {
        code: 222,
        value: '\"'
    }
    ],
    
    ieShiftTable: [
    {
        code: 186,
        value: ':'
    },
    {
        code: 187,
        value: '+'
    },
    {
        code: 188,
        value: '<'
    },
    {
        code: 189,
        value: '_'
    },
    {
        code: 190,
        value: '>'
    },
    {
        code: 191,
        value: '?'
    },
    {
        code: 192,
        value: '~'
    },
    {
        code: 219,
        value: '{'
    },
    {
        code: 220,
        value: '|'
    },
    {
        code: 221,
        value: '}'
    },
    {
        code: 222,
        value: '\"'
    }
    ],
    
    operaShiftTable: [
    {
        code: 59,
        value: ':'
    },
    {
        code: 61,
        value: '+'
    },
    {
        code: 44,
        value: '<'
    },
    {
        code: 45,
        value: '_'
    },
    {
        code: 46,
        value: '>'
    },
    {
        code: 47,
        value: '?'
    },
    {
        code: 96,
        value: '~'
    },
    {
        code: 91,
        value: '{'
    },
    {
        code: 92,
        value: '|'
    },
    {
        code: 93,
        value: '}'
    },
    {
        code: 39,
        value: '\"'
    }
    ]
};