jquery全屏插件

全屏插件

/**
* @name jQuery FullScreen Plugin
* @author Martin Angelov, Morten Sjøgren
* @version 1.2
* @url http://tutorialzine.com/2012/02/enhance-your-website-fullscreen-api/ * @license MIT License
*/

/*jshint browser: true, jquery: true */
(function($){
"use strict";

// These helper functions available only to our plugin scope.
function supportFullScreen(){
var doc = document.documentElement;

return ('requestFullscreen' in doc) ||
('mozRequestFullScreen' in doc && document.mozFullScreenEnabled) ||
('webkitRequestFullScreen' in doc);
}

function requestFullScreen(elem){
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullScreen) {
elem.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
}
}

function fullScreenStatus(){
return document.fullscreen ||
document.mozFullScreen ||
document.webkitIsFullScreen ||
false;
}

function cancelFullScreen(){
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitCancelFullScreen) {
document.webkitCancelFullScreen();
}
}

function onFullScreenEvent(callback){
$(document).on("fullscreenchange mozfullscreenchange webkitfullscreenchange", function(){
// The full screen status is automatically
// passed to our callback as an argument.
callback(fullScreenStatus());
});
}

// Adding a new test to the jQuery support object
$.support.fullscreen = supportFullScreen();

// Creating the plugin
$.fn.fullScreen = function(props){
if(!$.support.fullscreen || this.length !== 1) {
// The plugin can be called only
// on one element at a time

return this;
}

if(fullScreenStatus()){
// if we are already in fullscreen, exit
cancelFullScreen();
return this;
}

// You can potentially pas two arguments a color
// for the background and a callback function

var options = $.extend({
'background' : '#111',
'callback' : $.noop( ),
'fullscreenClass' : 'fullScreen'
}, props),

elem = this,

// This temporary div is the element that is
// actually going to be enlarged in full screen

fs = $('<div>', {
'css' : {
'overflow-y' : 'auto',
'background' : options.background,
'width' : '100%',
'height' : '100%'
}
})
.insertBefore(elem)
.append(elem);

// You can use the .fullScreen class to
// apply styling to your element
elem.addClass( options.fullscreenClass );

// Inserting our element in the temporary
// div, after which we zoom it in fullscreen

requestFullScreen(fs.get(0));

fs.click(function(e){
if(e.target == this){
// If the black bar was clicked
cancelFullScreen();
}
});

elem.cancel = function(){
cancelFullScreen();
return elem;
};

onFullScreenEvent(function(fullScreen){
if(!fullScreen){
// We have exited full screen.
// Detach event listener
$(document).off( 'fullscreenchange mozfullscreenchange webkitfullscreenchange' );
// Remove the class and destroy
// the temporary div

elem.removeClass( options.fullscreenClass ).insertBefore(fs);
fs.remove();
}

// Calling the facultative user supplied callback
if(options.callback) {
options.callback(fullScreen);
}
});

return elem;
};

$.fn.cancelFullScreen = function( ) {
cancelFullScreen();

return this;
};
}(jQuery));