// --------------------------------------------------------------------
// Javascript Magnifier v 0.97
// Written by Dino Termini - termini@email.it - May 9, 2003
// This script is freeware (GPL) but if you use it, please let me know!
//
// Portions of code by zoomIN, zoomOUT
// Author: Nguyen Duong Minh (Obie) - obie4web@yahoo.com
// WWW: http://ObieWebsite.SourceForge.net
// License: GNU (GPL)
//
// Portions of code by Webreference Javascript Cookie Functions
// Jupirmedia Corporation
// http://www.internet.com
// --------------------------------------------------------------------
//
// Please refer to DEMO.htm file for details and usage
//
// --------------------------------------------------------------------

// Configuration parameters
// ------------------------
// Measure unit in pixel (px) or points (pt)
// measureUnit = "pt"
measureUnit = "px"

// Minimum size allowed for SIZE attribute (like in <FONT SIZE="1"> )
minSize = 1;

// Minimum size allowed for STYLE attribute (like in <FONT STYLE="font-size: 10px"> )
minStyleSize = 10;

// Maximum size allowed for SIZE attribute
maxSize = 6;

// Maximum size allowed for STYLE attribute
maxStyleSize = 30;

// Start size for tags with no SIZE attribute defined
startSize = 1;

// Start size for tags with no font-size STYLE or CLASS attribute defined
startStyleSize = 13;

// Increasing and decreasing step
stepSize = 1;

// Increasing step for STYLE definition (measure previously declared will be used)
stepStyleSize = 2;

// To set your own hotkeys, use key generator tool page included
// Keys to zooming in (with and without CAPS lock). Default: "+"
//var keyin = 61;
//var keyinCAPS = 43;

// Keys to zooming out (with and without CAPS lock). Default: "-"
//var keyout = 45;
//var keyoutCAPS = 95;

// Keys for "hard" zooming in (with and without CAPS lock). Default: ">"
//var keyinIe = 46;
//var keyinIeCAPS = 62;

// Keys for "hard" zooming out (with and without CAPS lock). Default: "<"
//var keyoutIe = 44;
//var keyoutIeCAPS = 60;

// "Hard" zoom factor
var zoomFactor = 1.1;

// Max zoom allowed
var maxZoom = 4.096;

// Min zoom allowed
var minZoom = 0.625;

// Initial decrease zoom
var startDecZoom = 0.7;

// Initial increase zoom
var startIncZoom = 1.3;

// Cookie expiry (default one year, actually 365 days)
// 365 days in a year
// 24 hours in a day
// 60 minutes in an hour
// 60 seconds in a minute
// 1000 milliseconds in a second
userExpiry = 365 * 24 * 60 * 60 * 1000;

// Enable or disable alert messages
alertEnabled = true;

// Allow input fields resize (text, buttons, and so on)
allowInputResize = false;

// gfsZoom
var gfsZoom = 1;


// End of configuration parameters. Please do not edit below this line
// --------------------------------------------------------------------------------

// Input values:
// name - name of the cookie
// value - value of the cookie
// [expires] - expiration date of the cookie (defaults to end of current session)
// [path] - path for which the cookie is valid (defaults to path of calling document)
// [domain] - domain for which the cookie is valid (defaults to domain of calling document)
// [secure] - Boolean value indicating if the cookie transmission requires a secure transmission
// * an argument defaults when it is assigned null as a placeholder
// * a null placeholder is not required for trailing omitted arguments
function setCookie(name, value, expires, path, domain, secure) {
    // Check whether cookies enabled
    document.cookie = "Enabled=true";
    var cookieValid = document.cookie;

    // if retrieving the VALUE we just set actually works
    // then we know cookies enabled
    if (cookieValid.indexOf("Enabled=true") != -1) {
        var curCookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");

        document.cookie = curCookie;
        return(true);
    }
    else {
        return(false);
    }
}

// Input value:
// name - name of the desired cookie
// * return string containing value of specified cookie or null if cookie does not exist
function getCookie(name) {
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    } else
        begin += 2;
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
        end = dc.length;
    return unescape(dc.substring(begin + prefix.length, end));
}

// Input values:
// name - name of the cookie
// [path] - path of the cookie (must be same as path used to create cookie)
// [domain] - domain of the cookie (must be same as domain used to create cookie)
// * path and domain default if assigned null or omitted if no explicit argument proceeds
function deleteCookie(name, path, domain) {
    if (getCookie(name)) {
        document.cookie = name + "=" +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}

// Input value:
// date - any instance of the Date object
// * hand all instances of the Date object to this function for "repairs"
function fixDate(date) {
    var base = new Date(0);
    var skew = base.getTime();
    if (skew > 0)
        date.setTime(date.getTime() - skew);
}

function searchTags(childTree, level) {
    var retArray = new Array();
    var tmpArray = new Array();
    var j = 0;
    var childName = "";
    for (var i=0; i<childTree.length; i++) {
        childName = childTree[i].nodeName;
        if (childTree[i].hasChildNodes()) {
            if ((childTree[i].childNodes.length == 1) && (childTree[i].childNodes[0].nodeName == "#text"))
                retArray[j++] = childTree[i];
            else {
                tmpArray = searchTags(childTree[i].childNodes, level+1);
                for (var k=0;k<tmpArray.length; k++)
                    retArray[j++] = tmpArray[k];
                retArray[j++] = childTree[i];
            }
        }
        else
            retArray[j++] = childTree[i];
    }
    return(retArray);
}

function changeFontSize(stepSize, stepStyleSize, useCookie, base) {
    if (base) {
        var myObj = searchTags(base.childNodes, 0);
        var myCookieSize = parseInt(getCookie("incrSize"));
        var myCookieStyleSize = parseInt(getCookie("incrStyleSize"));
        var myStepSize = stepSize;
        var myStepStyleSize = stepStyleSize;
        var now = new Date();

        // Fix the bug in Navigator 2.0, Macintosh
        fixDate(now);

        if (isNaN(myCookieSize)) myCookieSize = 0;
        if (isNaN(myCookieStyleSize)) myCookieStyleSize = 0;

        // For debug purpose only
        // if (!confirm("COOKIE: SIZE ["+myCookieSize+"] STYLESIZE ["+myCookieStyleSize+"]")) return(0);

        // Check valid increment/decrement sizes or useCookie parameter
        if (useCookie) {
            myStepSize = myCookieSize;
            myStepStyleSize = myCookieStyleSize;
        }

        now.setTime(now.getTime() + userExpiry);

        myObjNumChilds = myObj.length;
        for (i=0; i<myObjNumChilds; i++) {
            myObjName = myObj[i].nodeName;

            // Only some tags will be parsed
            if (myObjName != "#text" && myObjName != "HTML" &&
            myObjName != "HEAD" && myObjName != "TITLE" &&
            myObjName != "STYLE" && myObjName != "SCRIPT" &&
            myObjName != "BR" && myObjName != "TBODY" &&
            myObjName != "#comment" && myObjName != "FORM") {
                // Skip INPUT fields, if required
                if (!allowInputResize && myObjName == "INPUT") continue;

                size = parseInt(myObj[i].getAttribute("size"));

                // Internet Explorer uses a different DOM implementation
                if (myObj[i].currentStyle)
                    styleSize = parseInt(myObj[i].currentStyle.fontSize);
                else
                    styleSize = parseInt(window.getComputedStyle(myObj[i], null).fontSize);

                // For debug purpose only. Note: can be very annoying
                // if (!confirm("TAG ["+myObjName+"] SIZE ["+size+"] STYLESIZE ["+styleSize+"]")) return(0);

                if (isNaN(size) || (size < minSize) || (size > maxSize))
                    size = startSize;

                if (isNaN(styleSize) || (styleSize < minStyleSize) || (styleSize > maxStyleSize))
                    styleSize = startStyleSize;

                if ( ((size > minSize) && (size < maxSize)) ||
                ((size == minSize) && (stepSize > 0)) ||
                ((size == maxSize) && (stepSize < 0)) || useCookie) {
                    myObj[i].setAttribute("size", size+myStepSize);
                }

                if ( ((styleSize > minStyleSize) && (styleSize < maxStyleSize)) ||
                ((styleSize == minStyleSize) && (stepStyleSize > 0)) ||
                ((styleSize == maxStyleSize) && (stepStyleSize < 0)) || useCookie) {
                    newStyleSize = styleSize+myStepStyleSize;
                    myObj[i].style.fontSize = newStyleSize+measureUnit;
                }
            } // End if condition ("only some tags")
        } // End main for cycle

        // Set the cookies
        if (!useCookie) {
            cookieIsSet = setCookie("incrSize", myStepSize+myCookieSize, now);
            cookieIsSet = setCookie("incrStyleSize", myStepStyleSize+myCookieStyleSize, now);
            if (alertEnabled && !cookieIsSet) {
                alert("Per guardar el tamany de la lletra, habilita les Cookies del teu navegador.");
            }
        }
    } // End if condition ("document.body exists")
}

// APDCAT specific adapter

function iniZoom(baseId){
    //alert(tag);
    if(baseId)
        base = document.getElementById(baseId);
    else
        base = document.body;
    changeFontSize(0, 0, false,base);
}
 
//END APDcat specific adapter

function zoomin() {
    if (window.parent.document.body.style.zoom < maxZoom) {
        if (window.parent.document.body.style.zoom > 0) {
            window.parent.document.body.style.zoom *= zoomFactor;
        }
        else {
            window.parent.document.body.style.zoom = startIncZoom;
        }
    }
    else {
        if (alertEnabled) {
            alert("Tamany màxim");
        }
    }
}

function zoomout() {
    if ( (window.parent.document.body.style.zoom > minZoom) ||
    (window.parent.document.body.style.zoom == 0) ) {
        if (window.parent.document.body.style.zoom > 0) {
            window.parent.document.body.style.zoom /= zoomFactor;
        }
        else {
            window.parent.document.body.style.zoom = startDecZoom;
        }
    }
    else {
        if (alertEnabled) {
            alert("Tamany mínim");
        }
    }
}

function checkzoom(e) {
    if (document.all) {
        myEvent = event.keyCode;
    }
    else {
        myEvent = e.which;
    }
    /*
    switch(myEvent) {
    case keyinIe:
    case keyinIeCAPS:
    zoomin();
    break;

    case keyoutIe:
    case keyoutIeCAPS:
    zoomout();
    break;

    case keyin:
    case keyinCAPS:
    increaseFontSize();
    break;

    case keyout:
    case keyoutCAPS:
    decreaseFontSize();
    break;

    default:
    break;
    }
    */
}

function changeSize(type, item, tam) {

    default_size = gfsZoom;

    if(isNaN(tam)) tam=default_size;
    tam=parseInt(tam);

    var str= "PRE: gfs es "+gfsZoom+" i tam es "+tam;

    //not allowed to click a button twice
    if(gfsZoom!=tam){
        if(tam>default_size){
            //alert('A');
            if(tam<0) tam=-(tam);
            steps = gfsZoom-tam;
            if(steps<0) steps=-(steps);

            increaseFontSize(type, item, steps);
            gfsZoom=gfsZoom+steps;
        }
        else if(tam<default_size){
            //alert('B');
            if(tam<0) tam=-(tam);
            steps = gfsZoom-tam;
            if(steps<0) steps=-(steps);

            decreaseFontSize(type, item, steps);
            gfsZoom=gfsZoom-steps;
        }
        else{
            //tam == 0 && gfsZoom != 0
            if(gfsZoom>default_size){
                //alert('C1');
                decreaseFontSize(type, item, tam);
            }
            else{
                //alert('C2');
                increaseFontSize(type, item, tam);
            }
            gfsZoom=default_size;
        }
    }
    //alert(str+"\n gfs es "+gfsZoom+" i tam es "+tam);
    return true;
}

function increaseFontSize(type, item, steps) {
    switch (type.toLowerCase()) {
        case 'tag':
            tags = document.getElementsByTagName(item);
            break
        case 'id':
            tags = document.getElementById(item);
            break
        default:
            tags = [document.body];
    }

    if (tags) {
        multiplier = steps;
        myStepStyleSize = stepStyleSize*multiplier;
        //alert('[ multiplier '+multiplier+'] ---> changeFontSize( myStepSize='+ stepSize + ', myStepStyleSize='+myStepStyleSize+' , .....)\n');
        if(tags.length){
            // array
            for (var i = 0; i < tags.length; i++) {
                changeFontSize(stepSize, myStepStyleSize, false,tags[i]);
            }
        }
        else{
            // single
            changeFontSize(stepSize, myStepStyleSize, false,tags);
        }
    }
    else {
        if (alertEnabled) {
            alert("El teu navegador no soporta questa funció");
        }
    }
}

function decreaseFontSize(type, item, steps) {

    switch (type.toLowerCase()) {
        case 'tag':
            tags = document.getElementsByTagName(item);
            break
        case 'id':
            tags = document.getElementById(item);
            break
        default:
            tags = [document.body];
    }

    if (tags) {
        multiplier = steps;
        if(multiplier<0) multiplier=-(multiplier);

        myStepSize = -stepSize;
        myStepStyleSize = -(stepStyleSize*multiplier);
        //alert('[ multiplier '+multiplier+'] ---> changeFontSize( myStepSize='+ stepSize + ', myStepStyleSize='+myStepStyleSize+' , .....)\n');
        if(tags.length){
            // array
            for (var i = 0; i < tags.length; i++) {
                changeFontSize(myStepSize, myStepStyleSize, false,tags[i]);
            }
        }
        else{
            // single
            changeFontSize(myStepSize, myStepStyleSize, false,tags);
        }
    }
    else {
        if (alertEnabled) {
            alert("El teu navegador no soporta questa funció");
        }
    }
}

if (document.layers) {
 // document.captureEvents(Event.KEYPRESS);
}

//document.onkeypress = checkzoom;