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R3600/invenio/base/static/js/mejs-invenio.js
5b47ffdba743iugw2017

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mejs-invenio.js
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// Globals for original video size when going fullscreen
var normalHeight = 0;
var normalWidth = 0;
$(document).ready(function() {
// Takes the selectbox containing the video sources and initiates the video tag with it
$('#mejs-resolution').each(function() {
// Assumes that the select element (dropdown) is in the same div or other element as the video element
var parent = $(this).parent()
var video = parent.find("video")[0]
initiate_video(this, video)
});
// Initialised the ME player
$('#mediaelement').mediaelementplayer({
features: ['playpause', 'current', 'progress', 'duration', 'invresolution', 'volume', 'invfullscreen'],
defaultVideoWidth: 854,
defaultVideoHeight: 480
});
});
// Appends the selectbox to the ME player controls
(function($) {
// Currently only works for the HTML5 player
if (!!document.createElement('video').canPlayType) {
MediaElementPlayer.prototype.buildinvresolution = function(player, controls, layer, media) {
var resolution_div = $('<div class="mejs-resolution"></div>');
var resolution_control = $('#mejs-resolution');
resolution_div.append(resolution_control);
resolution_div.appendTo(controls);
resolution_control.each(function() {
// When the selection is changed, reinitialise the video tag
this.onchange = function() {
initiate_video(this, $('#mediaelement')[0]);
player.options.alwaysShowControls = false;
};
// Makes the control bar of ME player fade in a nice way when we change the source
this.onmouseover = function() {
player.options.alwaysShowControls = true;
}
this.onblur = function() {
player.options.alwaysShowControls = false;
controls.stop(true, true).fadeOut(200, function() {
$(this).css('visibility','hidden');
$(this).css('display','block');
});
}
});
};
};
})(jQuery);
// Hack to the original fullscreen plugin of ME player to remember the size in case we switch to higher or lower resolution sources
(function($) {
MediaElementPlayer.prototype.buildinvfullscreen = function(player, controls, layers, media) {
if (!player.isVideo)
return;
var
container = player.container,
fullscreenBtn =
$('<div class="mejs-button mejs-fullscreen-button"><button type="button"></button></div>')
.appendTo(controls)
.click(function() {
var goFullscreen = (mejs.MediaFeatures.hasNativeFullScreen) ?
!media.webkitDisplayingFullscreen :
!media.isFullScreen;
setFullScreen(goFullscreen);
}),
setFullScreen = function(goFullScreen) {
switch (media.pluginType) {
case 'flash':
case 'silverlight':
media.setFullscreen(goFullScreen);
break;
case 'native':
if (mejs.MediaFeatures.hasNativeFullScreen) {
if (goFullScreen) {
media.webkitEnterFullScreen();
media.isFullScreen = true;
} else {
media.webkitExitFullScreen();
media.isFullScreen = false;
}
} else {
if (goFullScreen) {
// make full size
container
.addClass('mejs-container-fullscreen')
.width('100%')
.height('100%')
.css('z-index', 1000);
player.$media
.width('100%')
.height('100%');
layers.children('div')
.width('100%')
.height('100%');
fullscreenBtn
.removeClass('mejs-fullscreen')
.addClass('mejs-unfullscreen');
player.setControlsSize();
media.isFullScreen = true;
} else {
container
.removeClass('mejs-container-fullscreen')
.width(normalWidth)
.height(normalHeight)
.css('z-index', 1);
player.$media
.width(normalWidth)
.height(normalHeight);
layers.children('div')
.width(normalWidth)
.height(normalHeight);
fullscreenBtn
.removeClass('mejs-unfullscreen')
.addClass('mejs-fullscreen');
player.setControlsSize();
media.isFullScreen = false;
}
}
}
};
$(document).bind('keydown',function (e) {
if (media.isFullScreen && e.keyCode == 27) {
setFullScreen(false);
}
});
}
})(jQuery);
// Initialises a video tag by parsing data attributes of a selectbox
// Tryes to do some tricks to MediaElement if it is initialised
function initiate_video(dropdown, video) {
// If no video element is given, fail
if(!video) return;
// Initialise variables from dropdown (html select element) data attributes
var webm_src = $(dropdown.options[dropdown.selectedIndex]).attr('data-src-webm');
var ogv_src = $(dropdown.options[dropdown.selectedIndex]).attr('data-src-ogv');
var mp4_src = $(dropdown.options[dropdown.selectedIndex]).attr('data-src-mp4');
var webm_type = $(dropdown.options[dropdown.selectedIndex]).attr('data-type-webm');
var ogv_type = $(dropdown.options[dropdown.selectedIndex]).attr('data-type-ogv');
var mp4_type = $(dropdown.options[dropdown.selectedIndex]).attr('data-type-mp4');
var poster_src = $(dropdown.options[dropdown.selectedIndex]).attr('data-poster');
var video_width = $(dropdown.options[dropdown.selectedIndex]).attr('data-video-width');
var video_height = $(dropdown.options[dropdown.selectedIndex]).attr('data-video-height');
// The video might have been running, save its position
var position = video.currentTime;
var playing = !(video.paused);
// After the video was loaded, jump to the old position
try {
video.addEventListener("loadedmetadata", function() {
// don't set if zero; that will drop the poster and cause preload
if(position>0) video.currentTime = position;
if(playing) video.play();
this.removeEventListener("loadedmetadata",arguments.callee,true);
}, true);
}
catch(err) {
// IE will crash
};
// Set the new dimensions
video.style.width = video_width;
video.style.height = video_height;
normalWidth = video_width;
normalHeight = video_height;
// Apply the new poster
if (poster_src != "None") {
$(video).attr("poster", poster_src);
};
// Determine which video should be played and set it as source
// First check HTML5 support
if (!!document.createElement('video').canPlayType) {
$(video).empty()
if (mp4_type) {
$('<source/>', {
src: mp4_src, type: mp4_type
}).appendTo(video);
};
if (webm_type) {
$('<source/>', {
src: webm_src, type: webm_type
}).appendTo(video);
};
if (ogv_type) {
$('<source/>', {
src: webm_src, type: webm_type
}).appendTo(video);
};
}
// If not, we can only use Flash, set the mp4 source if available
else {
try {
$(video).empty()
if (mp4_type) {
$('<source/>', {
src: mp4_src, type: mp4_type
}).appendTo(video);
video.player.setSrc(mp4_src);
};
}
catch(err) {
};
};
// Update the mediaelement
try {
if(!video.player.media.isFullScreen) {
$('.mejs-container').each(function(){
this.style.width = video_width;
this.style.height = video_height;
});
$('.mejs-overlay').each(function(){
this.style.width = video_width;
this.style.height = video_height;
});
video.player.$media.width(video_width).height(video_height);
video.player.setControlsSize();
}
else {
video.style.width = "100%";
video.style.height = "100%"
};
}
catch(err) {
// Mediaelement was not initialized
};
// Make the control visible
dropdown.style.display = "inline";
// Reload the video
try {
video.load();
}
catch(err) {
// IE will crash
}
}
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