/*
* TextLimit - jQuery plugin for counting and limiting characters for input and textarea fields
* 
* pass '-1' as speed if you don't want the char-deletion effect. (don't just put 0)
* Example: jQuery("Textarea").textlimit('span.counter',256)
*
* $Version: 2009.07.25 +r2
* Copyright (c) 2009 Yair Even-Or
* vsync.design@gmail.com
*/
(function (jQuery) {
    jQuery.fn.textlimit = function (counter_el, thelimit, speed) {
        var charDelSpeed = speed || 15;
        var toggleCharDel = speed != -1;
        var toggleTrim = true;
        var that = this[0];
        var isCtrl = false;
        updateCounter();

        function updateCounter() {
            if (typeof that == "object")
                jQuery(counter_el).text("characters remaining: " + (thelimit - that.value.length));
        };

        this.keydown(function (e) {
            if (e.which == 17) isCtrl = true;
            var ctrl_a = (e.which == 65 && isCtrl == true) ? true : false; // detect and allow CTRL + A selects all.
            var ctrl_v = (e.which == 86 && isCtrl == true) ? true : false; // detect and allow CTRL + V paste.
            // 8 is 'backspace' and 46 is 'delete'
            if (this.value.length >= thelimit && e.which != '8' && e.which != '46' && ctrl_a == false && ctrl_v == false)
                e.preventDefault();
        })
		.keyup(function (e) {
		    updateCounter();
		    if (e.which == 17)
		        isCtrl = false;

		    if (this.value.length >= thelimit && toggleTrim) {
		        if (toggleCharDel) {
		            // first, trim the text a bit so the char trimming won't take forever
		            // Also check if there are more than 10 extra chars, then trim. just in case.
		            if ((this.value.length - thelimit) > 10)
		                that.value = that.value.substr(0, thelimit + 100);
		            var init = setInterval
						(
							function () {
							    if (that.value.length <= thelimit) {
							        init = clearInterval(init); updateCounter()
							    }
							    else {
							        // deleting extra chars (one by one)
							        that.value = that.value.substring(0, that.value.length - 1); jQuery(counter_el).text('Trimming... ' + (thelimit - that.value.length));
							    }
							}, charDelSpeed
						);
		        }
		        else this.value = that.value.substr(0, thelimit);
		    }
		});

    };
})(jQuery);