/**
* Common helpers to be used in catalogue or videoplayers
*
* @module Common
*/
/***
Time/Date helpers
***/
function twoDigitString( number ){
return ('0'+number).substr(-2);
}
function timeToDate( hhmm ){
var t = new Date();
return t.getFullYear() + "-" + (t.getMonth()+1) + "-" + t.getDate() + "T" + hhmm + ":00";
}
function daysLeft( time ){
return Math.ceil(Math.abs(((new Date(time)).getTime()) - ((new Date).getTime()))/8.64e7);
}
function UTCDate(){
return new Date(new Date().getTime() + new Date().getTimezoneOffset()*60*1000);
}
Date.prototype.getDayString = function(){
var days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
return days[this.getDay()];
}
Date.prototype.getMonthString = function(){
var months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
return months[this.getMonth()];
}
/**
* Extends Array to support sortBy, which sorts an array of objects by given attributes
* If secondary or more attributes are given and previous attribute comparison is equal, the next attribute is compared in given priority sorting order
* If an attribute is given with - prefix, the sort order is DESC.
* @method Array.prototype.sortBy
* @for Common
**/
Array.prototype.sortBy = function(){
var fields = arguments;
this.sort(function(a, b){
for( var i = 0; i < fields.length; ++i )
{
var field = fields[i];
var desc = false;
if( field[0] == "-" )
{
desc = true;
field = field.substring(1);
}
if (a[field] < b[field]){
return -1 + (2*desc);
}
if (a[field] > b[field]){
return 1 - (2*desc);
}
}
return 0;
});
};
Array.prototype.last = function(){
return this[this.length - 1];
};
/**
* greps off matching regular expression from a string. If there is more capturing blocs, return an array of strings.
* @method String.prototype.grep
* @param needle: the regular expression to perform for the string
* @param nomatch: default return value if string does not match to regex
* @param bytes: Additional regex bytes as a string.
**/
String.prototype.grep = function( needle, nomatch, bytes ){
var match = this.match( new RegExp(needle, bytes) );
return ( match? ( match.length == 2? match[1] : ( match.length==1? match[0] : match.slice(1)) ) : nomatch );
};
// like substring, capable to index negative numbers as indexes from the end.
String.prototype.cut = function( from, to ){
return this.substring( ( from < 0? this.length + from : from ), (to < 0? this.length + to : to ) )
};
var infoTimer = null;
function showInfo( msg, timeout, inMs )
{
clearTimeout( infoTimer );
timeout = timeout || 4; // sec
infoTimer = setTimeout(function(){
$("#info").addClass("hide");
}, timeout * ( inMs? 1 : 1000));
try{
$("#info").removeClass("hide");
if( typeof msg != "string" ){
msg = JSON.stringify( msg );
}
$("#info").html( XMLEscape( msg ) );
}
catch(e){
console.log( "error in show info function: " + e.message );
}
}
// adds event listener (action) for multiple (events) "separated by space" for object (obj)
function addEventListeners( obj, events, action ){
$.each(events.split(" "), function(i,event){
obj.addEventListener( event, action );
});
}
Element.prototype.addClass = function(cls){
$( this ).addClass( cls );
}
Element.prototype.removeClass = function(cls){
$( this ).removeClass( cls );
}
function selectElement(element, cls) {
$( "." + cls ).removeClass( "selected" );
$( element ).addClass( "selected" );
}
function setLoading(load){
loading = load;
}
function getClosest(from, target, direction){
var from_offset = $(from.element).offset();
var shortest =null;
var closestItem;
var cx = $(from.element).width()/2;
var cy = $(from.element).height()/2;
var pos = {
a : {
x : Math.round( from_offset.left + cx ) ,
y : Math.round( from_offset.top + cy ) ,
top : Math.round( from_offset.top ),
bottom: Math.round( from_offset.top + $(from.element).height()),
right : Math.round( from_offset.left + $(from.element).width()),
left : Math.round( from_offset.left )
}
};
var finalB = null;
$.each(target, function(i, item){ // find closest item, compares center coordinates
var el = item.element;
if(el == from.element)
return; // do not count itself
var offset = $(el).offset();
var cx2 = $(el).width()/2;
var cy2 = $(el).height()/2;
pos.b = {
x : Math.round( offset.left + cx ) ,
y : Math.round( offset.top + cy ) ,
top : Math.round( offset.top ),
bottom: Math.round( offset.top + $(el).height()),
right : Math.round( offset.left + $(el).width()),
left : Math.round( offset.left )
}
if( direction )
{
if( direction == "up" && (pos.b.y == pos.a.y || pos.b.y > pos.a.y )
|| direction == "down" && (pos.b.y <= pos.a.y)
|| direction == "left" && (pos.b.x >= pos.a.x - Math.abs( pos.b.y - pos.a.y ))
|| direction == "right" && (pos.b.x <= pos.a.x + Math.abs( pos.b.y - pos.a.y )))
return;
if( direction == "up" && (pos.a.top == pos.b.top || pos.a.top < pos.b.top )
|| direction == "down" && (pos.a.bottom == pos.b.bottom || pos.a.bottom > pos.b.bottom)
|| direction == "left" && (pos.a.left == pos.b.left || pos.a.left < pos.b.left)
|| direction == "right" && (pos.a.right == pos.b.right || pos.a.right > pos.b.right))
return;
}
var horizontal = direction == "left" || direction == "right";
var diagonalDistance = Math.sqrt(Math.pow(pos.b.x - pos.a.x,2) + Math.pow(pos.b.y - pos.a.y, 2));
var straightDistance = diagonalDistance;
/* Aligned elements are favoured */
if(horizontal){
if((pos.b.top == pos.a.top) || pos.a.bottom == pos.b.bottom){
straightDistance = (horizontal) ? Math.abs(pos.b.x - pos.a.x) : Math.abs(pos.b.y - pos.a.y);
straightDistance *= 0.5;
}
}
else{
if((pos.b.left == pos.a.left) || pos.a.right == pos.b.right){
straightDistance = (horizontal) ? Math.abs(pos.b.x - pos.a.x) : Math.abs(pos.b.y - pos.a.y);
straightDistance *= 0.5;
}
}
var dist = Math.min(straightDistance,diagonalDistance);
if ((!shortest || (dist && dist<shortest))) {
shortest = dist;
closestItem = item;
finalB = pos.b;
}
});
return closestItem;
}
var registeredKeys = [];
function registerKeys(mode) {
var mask;
// ui hidden, only red and green registered
if (mode == 0) {
mask = 0x1 + 0x2 + 0x4 + 0x8 + 0x10; // color buttons and navigation for launcher
}
else if( mode == -1 ){ // restore previous
mask = registeredKeys.pop();
}
else {
mask = 0x1 + 0x2 + 0x4 + 0x8 + 0x10 + 0x20 + 0x40 + 0x80 + 0x100;
}
try {
var app = document.getElementById('appmgr').getOwnerApplication(document);
//showInfo("register keys mask: " + mask);
app.privateData.keyset.setValue(mask);
if( mode >= 0 ){
registeredKeys.push( mask );
}
} catch (e) {
}
}
function stripTags( str ){
return str.replace(/<\/?[^>]+(>|$)/g, "");
}
function XMLEscape(sValue, bUseApos) {
var sval="";
if(!sValue) return "";
sValue = stripTags( sValue );
if (sValue.search("<") != -1 || sValue.search(">") != -1 || sValue.search("&") != -1 || sValue.search(""") != -1 || sValue.search("'") != -1 || sValue.search("'") != -1 || sValue.search("/") != -1 ){
return sValue;
}
for(var idx=0; idx < sValue.length; idx++) {
var c = sValue.charAt(idx);
if (c == '<') sval += "<";
else if (c == '>') sval += ">";
else if (c == '&') sval += "&";
else if (c == '"') sval += """;
else if (c == '/') sval += "/";
else if (c == '\'') sval += (bUseApos ? "'" : "'");
else sval += c;
}
return sval;
}
window.onerror = function(message, url, lineNumber) {
//showInfo( message + " url: " + url + " line: " + lineNumber + "<br>" + (new Error()).stack, 10 );
console.log(message + " url: " + url + " line: " + lineNumber + "<br>" + (new Error()).stack, 10);
return false; // when false, print it also to js console
};
function updateOnlineStatus(event) {
var condition = navigator.onLine ? "online" : "offline";
console.log("Connection state changed to: " + condition);
showInfo("Connection state changed to: " + condition);
}
window.addEventListener('online', updateOnlineStatus);
window.addEventListener('offline', updateOnlineStatus);
// adds event listener (action) for multiple (events) "separated by space" for object (obj)
function addEventListeners( obj, events, action ){
$.each(events.split(" "), function(i,event){
obj.addEventListener( event, action );
});
}
function addZeroPrefix(n){
return ("0" + n).slice(-2);
}
function arrayBufferToString(buffer){
var arr = new Uint8Array(buffer);
var str = String.fromCharCode.apply(String, arr);
if(/[\u0080-\uffff]/.test(str)){
throw new Error("this string seems to contain (still encoded) multibytes");
}
return str;
}
