Ext.namespace('Genesis');

/**
 * InputTextMask script used for mask/regexp operations.
 * Mask Individual Character Usage:
 * 9 - designates only numeric values
 * L - designates only uppercase letter values
 * l - designates only lowercase letter values
 * A - designates only alphanumeric values
 * X - denotes that a custom client script regular expression is specified</li>
 * All other characters are assumed to be "special" characters used to mask the input component.
 * Example 1:
 * (999)999-9999 only numeric values can be entered where the the character
 * position value is 9. Parenthesis and dash are non-editable/mask characters.
 * Example 2:
 * 99L-ll-X[^A-C]X only numeric values for the first two characters,
 * uppercase values for the third character, lowercase letters for the
 * fifth/sixth characters, and the last character X[^A-C]X together counts
 * as the eighth character regular expression that would allow all characters
 * but "A", "B", and "C". Dashes outside the regular expression are non-editable/mask characters.
 * @constructor
 * @param (String) mask The InputTextMask
 * @param (boolean) clearWhenInvalid True to clear the mask when the field blurs and the text is invalid. Optional, default is true.
 */
Genesis.InputTextMask = function(mask,clearWhenInvalid) {

    if(clearWhenInvalid === undefined)
		this.clearWhenInvalid = true;
	else
		this.clearWhenInvalid = clearWhenInvalid;
    this.rawMask = mask;
    this.viewMask = '';
    this.maskArray = new Array();
    var mai = 0;
    var regexp = '';
    for(var i=0; i<mask.length; i++){
        if(regexp){
            if(regexp == 'X'){
                regexp = '';
            }
            if(mask.charAt(i) == 'X'){
                this.maskArray[mai] = regexp;
                mai++;
                regexp = '';
            } else {
                regexp += mask.charAt(i);
            }
        } else if(mask.charAt(i) == 'X'){
            regexp += 'X';
            this.viewMask += '_';
        } else if(mask.charAt(i) == '9' || mask.charAt(i) == 'L' || mask.charAt(i) == 'l' || mask.charAt(i) == 'A') {
            this.viewMask += '_';
            this.maskArray[mai] = mask.charAt(i);
            mai++;
        } else {
            this.viewMask += mask.charAt(i);
            this.maskArray[mai] = RegExp.escape(mask.charAt(i));
            mai++;
        }
    }

    this.specialChars = this.viewMask.replace(/(L|l|9|A|_|X)/g,'');
};

Genesis.InputTextMask.prototype = {

    init : function(field) {
        this.field = field;

        if (field.rendered){
            this.assignEl();
        } else {
            field.on('render', this.assignEl, this);
        }

        field.on('blur',this.removeValueWhenInvalid, this);
        field.on('focus',this.processMaskFocus, this);
    },

    assignEl : function() {
        this.inputTextElement = this.field.getEl().dom;
        this.field.getEl().on('keypress', this.processKeyPress, this);
        this.field.getEl().on('keydown', this.processKeyDown, this);
        if(Ext.isSafari || Ext.isIE){
            this.field.getEl().on('paste',this.startTask,this);
            this.field.getEl().on('cut',this.startTask,this);
        }
        if(Ext.isGecko || Ext.isOpera){
            this.field.getEl().on('mousedown',this.setPreviousValue,this);
        }
        if(Ext.isGecko){
          this.field.getEl().on('input',this.onInput,this);
        }
        if(Ext.isOpera){
          this.field.getEl().on('input',this.onInputOpera,this);
        }
    },
    onInput : function(){
        this.startTask(false);
    },
    onInputOpera : function(){
      if(!this.prevValueOpera){
        this.startTask(false);
      }else{
        this.manageBackspaceAndDeleteOpera();
      }
    },
    
    manageBackspaceAndDeleteOpera: function(){
      this.inputTextElement.value=this.prevValueOpera.cursorPos.previousValue;
      this.manageTheText(this.prevValueOpera.keycode,this.prevValueOpera.cursorPos);
      this.prevValueOpera=null;
    },

    setPreviousValue : function(event){
        this.oldCursorPos=this.getCursorPosition();
    },

    getValidatedKey : function(keycode, cursorPosition) {
        var maskKey = this.maskArray[cursorPosition.start];
        if(maskKey == '9'){
            return keycode.pressedKey.match(/[0-9]/);
        } else if(maskKey == 'L'){
            return (keycode.pressedKey.match(/[A-Za-z]/))? keycode.pressedKey.toUpperCase(): null;
        } else if(maskKey == 'l'){
            return (keycode.pressedKey.match(/[A-Za-z]/))? keycode.pressedKey.toLowerCase(): null;
        } else if(maskKey == 'A'){
            return keycode.pressedKey.match(/[A-Za-z0-9]/);
        } else if(maskKey){
            return (keycode.pressedKey.match(new RegExp(maskKey)));
        }
        return(null);
    },

    removeValueWhenInvalid : function() {
        if(this.clearWhenInvalid && this.inputTextElement.value.indexOf('_') > -1){
            this.inputTextElement.value = '';
        }
    },

    managePaste : function() {
        if(this.oldCursorPos==null){
          return;
        }
        var valuePasted=this.inputTextElement.value.substring(this.oldCursorPos.start,this.inputTextElement.value.length-(this.oldCursorPos.previousValue.length-this.oldCursorPos.end));
        if(this.oldCursorPos.start<this.oldCursorPos.end){//there is selection...
          this.oldCursorPos.previousValue=
            this.oldCursorPos.previousValue.substring(0,this.oldCursorPos.start)+
            this.viewMask.substring(this.oldCursorPos.start,this.oldCursorPos.end)+
            this.oldCursorPos.previousValue.substring(this.oldCursorPos.end,this.oldCursorPos.previousValue.length);
          valuePasted=valuePasted.substr(0,this.oldCursorPos.end-this.oldCursorPos.start);
        }
        this.inputTextElement.value=this.oldCursorPos.previousValue;
        keycode={unicode :'',
        isShiftPressed: false,
        isTab: false,
        isBackspace: false,
        isLeftOrRightArrow: false,
        isDelete: false,
        pressedKey : ''
        }
        var charOk=false;
        for(var i=0;i<valuePasted.length;i++){
            keycode.pressedKey=valuePasted.substr(i,1);
            keycode.unicode=valuePasted.charCodeAt(i);
            this.oldCursorPos=this.skipMaskCharacters(keycode,this.oldCursorPos);
            if(this.oldCursorPos===false){
                break;
            }
            if(this.injectValue(keycode,this.oldCursorPos)){
                charOk=true;
                this.moveCursorToPosition(keycode, this.oldCursorPos);
                this.oldCursorPos.previousValue=this.inputTextElement.value;
                this.oldCursorPos.start=this.oldCursorPos.start+1;
            }
        }
        if(!charOk && this.oldCursorPos!==false){
            this.moveCursorToPosition(null, this.oldCursorPos);
        }
        this.oldCursorPos=null;
    },

    processKeyDown : function(e){
        this.processMaskFormatting(e,'keydown');
    },

    processKeyPress : function(e){
        this.processMaskFormatting(e,'keypress');
    },

    startTask : function(setOldCursor){
        if(this.task==undefined){
            this.task=new Ext.util.DelayedTask(this.managePaste,this);
      }
        if(setOldCursor!== false){
            this.oldCursorPos=this.getCursorPosition();
      }
      this.task.delay(0);
    },

    skipMaskCharacters : function(keycode, cursorPos){
        if(cursorPos.start!=cursorPos.end && (keycode.isDelete || keycode.isBackspace))
            return(cursorPos);
        while(this.specialChars.match(RegExp.escape(this.viewMask.charAt(((keycode.isBackspace)? cursorPos.start-1: cursorPos.start))))){
            if(keycode.isBackspace) {
                cursorPos.dec();
            } else {
                cursorPos.inc();
            }
            if(cursorPos.start >= cursorPos.previousValue.length || cursorPos.start < 0){
                return false;
            }
        }
        return(cursorPos);
    },

    isManagedByKeyDown : function(keycode){
        if(keycode.isDelete || keycode.isBackspace){
            return(true);
        }
        return(false);
    },

    processMaskFormatting : function(e, type) {
        this.oldCursorPos=null;
        var cursorPos = this.getCursorPosition();
        var keycode = this.getKeyCode(e, type);
        if(keycode.unicode==0){//?? sometimes on Safari
            return;
        }
        if((keycode.unicode==67 || keycode.unicode==99) && e.ctrlKey){//Ctrl+c, let's the browser manage it!
            return;
        }
        if((keycode.unicode==88 || keycode.unicode==120) && e.ctrlKey){//Ctrl+x, manage paste
            this.startTask();
            return;
        }
        if((keycode.unicode==86 || keycode.unicode==118) && e.ctrlKey){//Ctrl+v, manage paste....
            this.startTask();
            return;
        }
        if((keycode.isBackspace || keycode.isDelete) && Ext.isOpera){
          this.prevValueOpera={cursorPos: cursorPos, keycode: keycode};
          return;
        }
        if(type=='keydown' && !this.isManagedByKeyDown(keycode)){
            return true;
        }
        if(type=='keypress' && this.isManagedByKeyDown(keycode)){
            return true;
        }
        if(this.handleEventBubble(e, keycode, type)){
            return true;
        }
        return(this.manageTheText(keycode, cursorPos));
    },
    
    manageTheText: function(keycode, cursorPos){
      if(this.inputTextElement.value.length === 0){
          this.inputTextElement.value = this.viewMask;
      }
      cursorPos=this.skipMaskCharacters(keycode, cursorPos);
      if(cursorPos===false){
          return false;
      }
      if(this.injectValue(keycode, cursorPos)){
          this.moveCursorToPosition(keycode, cursorPos);
      }
      return(false);
    },

    processMaskFocus : function(){
        if(this.inputTextElement.value.length == 0){
            var cursorPos = this.getCursorPosition();
            this.inputTextElement.value = this.viewMask;
            this.moveCursorToPosition(null, cursorPos);
        }
    },

    isManagedByBrowser : function(keyEvent, keycode, type){
        if(((type=='keypress' && keyEvent.charCode===0) ||
            type=='keydown') && (keycode.unicode==Ext.EventObject.TAB ||
            keycode.unicode==Ext.EventObject.RETURN ||
            keycode.unicode==Ext.EventObject.ENTER ||
            keycode.unicode==Ext.EventObject.SHIFT ||
            keycode.unicode==Ext.EventObject.CONTROL ||
            keycode.unicode==Ext.EventObject.ESC ||
            keycode.unicode==Ext.EventObject.PAGEUP ||
            keycode.unicode==Ext.EventObject.PAGEDOWN ||
            keycode.unicode==Ext.EventObject.END ||
            keycode.unicode==Ext.EventObject.HOME ||
            keycode.unicode==Ext.EventObject.LEFT ||
            keycode.unicode==Ext.EventObject.UP ||
            keycode.unicode==Ext.EventObject.RIGHT ||
            keycode.unicode==Ext.EventObject.DOWN)){
                return(true);
        }
        return(false);
    },

    handleEventBubble : function(keyEvent, keycode, type) {
        try {
            if(keycode && this.isManagedByBrowser(keyEvent, keycode, type)){
                return true;
            }
            keyEvent.stopEvent();
            return false;
        } catch(e) {
            alert(e.message);
        }
    },

    getCursorPosition : function() {
        var s, e, r;
        if(this.inputTextElement.createTextRange){
            r = document.selection.createRange().duplicate();
            r.moveEnd('character', this.inputTextElement.value.length);
            if(r.text === ''){
                s = this.inputTextElement.value.length;
            } else {
                s = this.inputTextElement.value.lastIndexOf(r.text);
            }
            r = document.selection.createRange().duplicate();
            r.moveStart('character', -this.inputTextElement.value.length);
            e = r.text.length;
        } else {
            s = this.inputTextElement.selectionStart;
            e = this.inputTextElement.selectionEnd;
        }
        return this.CursorPosition(s, e, r, this.inputTextElement.value);
    },

    moveCursorToPosition : function(keycode, cursorPosition) {
        var p = (!keycode || (keycode && keycode.isBackspace ))? cursorPosition.start: cursorPosition.start + 1;
        if(this.inputTextElement.createTextRange){
            cursorPosition.range.move('character', p);
            cursorPosition.range.select();
        } else {
            this.inputTextElement.selectionStart = p;
            this.inputTextElement.selectionEnd = p;
        }
    },

    injectValue : function(keycode, cursorPosition) {
        if (!keycode.isDelete && keycode.unicode == cursorPosition.previousValue.charCodeAt(cursorPosition.start))
            return true;
        var key;
        if(!keycode.isDelete && !keycode.isBackspace){
            key=this.getValidatedKey(keycode, cursorPosition);
        } else {
            if(cursorPosition.start == cursorPosition.end){
                key='_';
                if(keycode.isBackspace){
                    cursorPosition.dec();
                }
            } else {
                key=this.viewMask.substring(cursorPosition.start,cursorPosition.end);
            }
        }
        if(key){
            this.inputTextElement.value = cursorPosition.previousValue.substring(0,cursorPosition.start)
                + key +
                cursorPosition.previousValue.substring(cursorPosition.start + key.length,cursorPosition.previousValue.length);
            return true;
        }
        return false;
    },

    getKeyCode : function(onKeyDownEvent, type) {
        var keycode = {};
        keycode.unicode = onKeyDownEvent.getKey();
        keycode.isShiftPressed = onKeyDownEvent.shiftKey;
        
        keycode.isDelete = ((onKeyDownEvent.getKey() == Ext.EventObject.DELETE && type=='keydown') || ( type=='keypress' && onKeyDownEvent.charCode===0 && onKeyDownEvent.keyCode == Ext.EventObject.DELETE))? true: false;
        keycode.isTab = (onKeyDownEvent.getKey() == Ext.EventObject.TAB)? true: false;
        keycode.isBackspace = (onKeyDownEvent.getKey() == Ext.EventObject.BACKSPACE)? true: false;
        keycode.isLeftOrRightArrow = (onKeyDownEvent.getKey() == Ext.EventObject.LEFT || onKeyDownEvent.getKey() == Ext.EventObject.RIGHT)? true: false;
        keycode.pressedKey = String.fromCharCode(keycode.unicode);
        return(keycode);
    },

    CursorPosition : function(start, end, range, previousValue) {
        var cursorPosition = {};
        cursorPosition.start = isNaN(start)? 0: start;
        cursorPosition.end = isNaN(end)? 0: end;
        cursorPosition.range = range;
        cursorPosition.previousValue = previousValue;
        cursorPosition.inc = function(){cursorPosition.start++;cursorPosition.end++;};
        cursorPosition.dec = function(){cursorPosition.start--;cursorPosition.end--;};
        return(cursorPosition);
    }
};

Ext.applyIf(RegExp, {
  escape : function(str) {
    return new String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
  }
});