/*************************************************************************

  This code is from Dynamic Web Coding at dyn-web.com

  Copyright 2004-8 by Sharon Paine 

  See Terms of Use at www.dyn-web.com/business/terms.php

  regarding conditions under which you may use this code.

  This notice must be retained in the code as is!

*************************************************************************/



/*

    dw_sizerdx.js version date: March 2008

    requires dw_cookies.js (revised Jan 2008 version)

    

    latest revisions:

        unobtrusive event handling added

        cleanup getValueFromQueryString fn

        modified init fn for event handling and to prevent possible scope problem

*/







var dw_fontSizerDX = {

    sizeUnit: "px",

    defaultSize: 13,

    maxSize: 21,

    minSize: 9,

    sizerDivId: 'sizer', // div id for sizer controls

    queryName: "dw_fsz", // name to check query string for when passing size in URL

    cookieLifetime: 180, // how long to keep cookie

    

    adjustList: [],  // set method populates



    setDefaults: function(unit, dflt, mn, mx, sels) {

        this.sizeUnit = unit; this.defaultSize = dflt;

        this.maxSize = mx;    this.minSize = mn;

        if (sels) this.set(dflt, mn, mx, sels);

    },



    set: function (dflt, mn, mx, sels) { 

        var ln = this.adjustList.length;        

        for (var i=0; sels[i]; i++) {

            this.adjustList[ln+i] = [];

            this.adjustList[ln+i]["sel"]  = sels[i];

            this.adjustList[ln+i]["dflt"] = dflt;

            this.adjustList[ln+i]["min"]   = mn || this.minSize;

            this.adjustList[ln+i]["max"]   = mx || this.maxSize;

            // hold ratio of this selector's default size to this.defaultSize for calcs in adjust fn 

            this.adjustList[ln+i]["ratio"] = this.adjustList[ln+i]["dflt"] / this.defaultSize;

        }

    },



    addHandlers: function () {

        var sizerEl = document.getElementById( dw_fontSizerDX.sizerDivId );

        if ( !dw_fontSizerDX.sizeIncrement ) { dw_fontSizerDX.getSizeIncrement(); }

        var links = sizerEl.getElementsByTagName('a');

        for (var i=0; links[i]; i++) {

            if ( dw_hasClass( links[i], 'increase') ) {

                links[i].onclick = function () { dw_fontSizerDX.adjust( dw_fontSizerDX.sizeIncrement ); return false }

            } else if ( dw_hasClass( links[i], 'decrease') ) {

                links[i].onclick = function () { dw_fontSizerDX.adjust( -dw_fontSizerDX.sizeIncrement ); return false }

            } else if ( dw_hasClass( links[i], 'reset')  ) {

                links[i].onclick = function () { dw_fontSizerDX.reset(); return false }

            }

        }

        if (sizerEl) sizerEl.style.display = "block";

    },



    getSizeIncrement: function () {

        var val = 2;

        switch ( dw_fontSizerDX.sizeUnit ) {

            case 'px' : val = 2; break;

            case 'em' : val = .2; break;

            case '%' : val = 10; break;

        }

        dw_fontSizerDX.sizeIncrement = val;

    },

    

    init: function() {

        if ( !document.getElementById || !document.getElementsByTagName || !document.createElement ) return;

        var _this = dw_fontSizerDX;

        if ( !_this.doControlsSetup ) {

            _this.addHandlers();

        } else {

            _this.setupControls();

        }

        var size;

        // check query string and cookie for fontSize

        // check size (in case default unit changed or size passed in url out of range)

        size = dw_getValueFromQueryString( _this.queryName );

        if ( isNaN( parseFloat(size) ) || size > _this.maxSize || size < _this.minSize ) {

            size = dw_getCookie("fontSize");

            if ( isNaN( parseFloat(size) ) || size > _this.maxSize || size < _this.minSize ) {

                size = _this.defaultSize;

            }

        } 

        // if neither set nor setDefaults populates adjustList, apply sizes to body and td's

        if (_this.adjustList.length == 0) _this.set(  _this.defaultSize, _this.minSize, _this.maxSize, ['body', 'td'] ); 

        _this.curSize = _this.defaultSize;  // create curSize property to use in calculations 

        if ( size != _this.defaultSize ) _this.adjust( size - _this.defaultSize );

    },



    adjust: function(n) {

        if ( !this.curSize ) return; 

        var alist, size, list, i, j;

        // check against max/minSize

        if ( n > 0 ) {

            if ( this.curSize + n > this.maxSize ) n = this.maxSize - this.curSize;

        } else if ( n < 0 ) {

            if ( this.curSize + n < this.minSize ) n = this.minSize - this.curSize;

        }

        if ( n == 0 ) return;

        this.curSize += n;

        // loop through adjustList, calculating size, checking max/min

        alist = this.adjustList;

        for (i=0; alist[i]; i++) {

            size = this.curSize * alist[i]['ratio']; // maintain proportion 

            size = Math.max(alist[i]['min'], size); size = Math.min(alist[i]['max'], size);

            list = dw_getElementsBySelector( alist[i]['sel'] );

            for (j=0; list[j]; j++) { list[j].style.fontSize = size + this.sizeUnit; }

        }

        dw_setCookie( "fontSize", this.curSize, this.cookieLifetime, "/" );

    },



    reset: function() {

        if ( !this.curSize ) return; 

        var alist = this.adjustList, list, i, j;

        for (i=0; alist[i]; i++) {

            list = dw_getElementsBySelector( alist[i]['sel'] );

            for (j=0; list[j]; j++) { 

                // Reset adjustList elements to their default sizes

                //list[j].style.fontSize = alist[i]['dflt'] + this.sizeUnit;

                list[j].style.fontSize = '';  // restores original font size (unless set inline!)

            } 

        }

        this.curSize = this.defaultSize;

        dw_deleteCookie("fontSize", "/");

    }



};



// resource: simon.incutio.com/archive/2003/03/25/getElementsBySelector

function dw_getElementsBySelector(selector) {

    if (!document.getElementsByTagName) return [];

    var nodeList = [document], tokens, bits, list, col, els, i, j, k;

    selector = selector.normalize();

    tokens = selector.split(' ');

    for (i=0; tokens[i]; i++) {

        if ( tokens[i].indexOf('#') != -1 ) {  // id

            bits = tokens[i].split('#'); 

            var el = document.getElementById( bits[1] );

            if (!el) return []; 

            if ( bits[0] ) {  // check tag

                if ( el.tagName.toLowerCase() != bits[0].toLowerCase() ) return [];

            }

            for (j=0; nodeList[j]; j++) {  // check containment

                if ( nodeList[j] == document || dw_contained(el, nodeList[j]) ) 

                    nodeList = [el];

                else return [];

            }

        } else if ( tokens[i].indexOf('.') != -1 ) {  // class

            bits = tokens[i].split('.'); col = [];

            for (j=0; nodeList[j]; j++) {

                els = dw_getElementsByClassName( bits[1], bits[0], nodeList[j] );

                for (k=0; els[k]; k++) { col[col.length] = els[k]; }

            }

            nodeList = [];

            for (j=0; col[j]; j++) { nodeList.push(col[j]); }

        } else {  // element 

            els = []; 

            for (j = 0; nodeList[j]; j++) {

                list = nodeList[j].getElementsByTagName(tokens[i]);

                for (k = 0; list[k]; k++) { els.push(list[k]); }

            }

            nodeList = els;

        }

    }

    return nodeList;

};



function dw_getElementsByClassName(sClass, sTag, oCont) {

    var result = [], list, i;

    var re = new RegExp("\\b" + sClass + "\\b", "i");

    oCont = oCont? oCont: document;

    if ( document.getElementsByTagName ) {

        if ( !sTag || sTag == "*" ) { // for ie5

            list = oCont.all? oCont.all: oCont.getElementsByTagName("*");

        } else {

            list = oCont.getElementsByTagName(sTag);

        }

        for (i=0; list[i]; i++) 

            if ( re.test( list[i].className ) ) result.push( list[i] );

    }

    return result;

};



// obj: link or window.location

function dw_getValueFromQueryString(name, obj) {

    obj = obj? obj: window.location; 

    if (obj.search && obj.search.indexOf(name != -1) ) {

        var pairs = obj.search.slice(1).split("&"); // name/value pairs

        var set;

        for (var i=0; pairs[i]; i++) {

            set = pairs[i].split("="); // Check each pair for match on name 

            if ( set[0] == name && set[1] ) {

                return set[1];

            }

        }

    }

    return '';

}



function dw_hasClass(el, cl) {

    var re = new RegExp("\\b" + cl + "\\b", "i");

    if ( re.test( el.className ) ) {

        return true;

    }

    return false;

}



// returns true of oNode is contained by oCont (container)

function dw_contained(oNode, oCont) {

    if (!oNode) return; // in case alt-tab away while hovering (prevent error)

    while ( oNode = oNode.parentNode ) if ( oNode == oCont ) return true;

    return false;

};



if (!Array.prototype.push) {  // ie5.0

	Array.prototype.push =  function() {

		for (var i=0; arguments[i]; i++) this[this.length] = arguments[i];

		return this[this.length-1]; // return last value appended

	}

};



String.prototype.normalize = function() {

	var re = /\s\s+/g;

	return this.trim().replace(re, " ");

};



String.prototype.trim = function() {

	var re = /^\s+|\s+$/g;

	return this.replace(re, "");

};



// Danny Goodman's version (DHTML def ref)

function addLoadEvent(fp) {

    var oldQueue = window.onload? window.onload: function() {};

    window.onload = function() {

        oldQueue();

        fp();

    }

}



/////////////////////////////////////////////////////////////////////

// Reminder about licensing requirements

// See Terms of Use at www.dyn-web.com/business/terms.php

// Those who remove without purchasing a required license could be subject to legal action!

// OK to remove after purchasing a license or if using the code on a personal site.

function dw_checkAuth() {

    var loc = window.location.hostname.toLowerCase();

    var msg = 'A license is required for commercial use of this code.\n' + 

        'Please adhere to our Terms of Use if you use dyn-web code.';

    if ( !( loc == '' || loc == '127.0.0.1' || loc.indexOf('localhost') != -1 

         || loc.indexOf('192.168.') != -1 || loc.indexOf('dyn-web.com') != -1 ) ) {

        alert(msg);

    }

}

//addLoadEvent( dw_checkAuth );

/////////////////////////////////////////////////////////////////////