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jquery.opentok.layout.js
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jquery.opentok.layout.js
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(function ($) {
if(!$.openTokLayout){
$.openTokLayout = { };
}
$.openTokLayout.defaults = {
minMarginHeight: 6,
minMarginWidth: 6,
aspectRatio: 4/3,
};
$.fn.openTokLayout = function( options ) {
//this.options = $.extend($.openTokLayout.defaults, options);
var returnValue = this;
var bindEvents = [$.openTok.event.streamAdded, $.openTok.event.streamRemoved, $.openTok.event.publish, $.openTok.publisherEvent.resize, $.openTok.event.containerResize].join(' ');
this.bind(bindEvents, function(e){
$.openTokLayout.tileLayout(e.openTok.element);
});
};
$.openTokLayout.tileLayout = function(openTokElement){
var openTokOptions = openTokElement.openTok('option');
var streamContainer = $(openTokOptions.cssSelector.streamsContainer, openTokElement);
var streamObjects = $([openTokOptions.streamCssSelector.streamContainer, openTokOptions.cssSelector.publisherContainer].join(', ') , streamContainer).find('object');
var numTiles = streamObjects.length;
var containerWidth = streamContainer.width();
var containerHeight = streamContainer.height();
var aspectRatio = 4/3;
var minMarginHeight = 6;
var minMarginWidth = 6;
var tileSize = $.openTokLayout.tileSize(numTiles, containerWidth, containerHeight, aspectRatio);
var marginWidth = 0;
var marginHeight = 0;
if(containerWidthSpace = (containerWidth - (tileSize.width * tileSize.columns))){
marginWidth = (containerWidthSpace / tileSize.columns) / 2;
}
if(containerHeightSpace = (containerHeight -(tileSize.height * tileSize.rows))){
marginHeight = (containerHeightSpace / tileSize.rows) / 2;
}
if(marginHeight < minMarginHeight){
tileSize.height = tileSize.height - ((minMarginHeight - marginHeight) * 2);
marginHeight = minMarginHeight;
}
if(marginWidth < minMarginWidth){
tileSize.width = tileSize.width - ((minMarginWidth - marginWidth) * 2);
marginWidth = minMarginWidth;
}
var emptyTiles;
var lastRowTiles;
var lastRowMarginWidth;
if(emptyTiles = tileSize.gridSize - numTiles){
lastRowTiles = (tileSize.columns - emptyTiles);
lastRowMarginWidth = ((containerWidth - (tileSize.width * lastRowTiles)) / lastRowTiles) / 2;
}
$([openTokOptions.streamCssSelector.streamWrapper, openTokOptions.cssSelector.publisherWrapper].join(', '), streamContainer).each(function(i){
if(emptyTiles && i >= tileSize.columns * (tileSize.rows - 1)){
$(this).css("margin-left", lastRowMarginWidth+'px')
.css("margin-right", lastRowMarginWidth+'px')
.css("margin-top", marginHeight+'px')
.css("margin-bottom", marginHeight+'px');
}
else{
$(this).css("margin-left", marginWidth+'px')
.css("margin-right", marginWidth+'px')
.css("margin-top", marginHeight+'px')
.css("margin-bottom", marginHeight+'px');
}
});
var publisherWrapper = $(openTokOptions.cssSelector.publisherWrapper);
var markupWidth = publisherWrapper.outerWidth() - publisherWrapper.width();
var markupHeight = publisherWrapper.outerHeight() - publisherWrapper.height();
tileSize.width = tileSize.width - markupWidth;
tileSize.height = tileSize.height - markupHeight;
streamObjects.each(function(){
this.width = tileSize.width;
this.height = tileSize.height;
});
};
$.openTokLayout.tileSize = function(numTiles, containerWidth, containerHeight, aspectRatio){
var newTileWidth;
var newTileHeight;
var tileWidth = aspectRatio;
var tileHeight = 1;
var numColumns = Math.sqrt( (numTiles * tileHeight * containerWidth) / (containerHeight * tileWidth) );
var lowBoundColumns = Math.floor(numColumns);
var highBoundColumns = Math.ceil(numColumns);
var lowNumRows = Math.ceil(numTiles / lowBoundColumns);
var highNumRows = Math.ceil(numTiles / highBoundColumns);
var verticalScale = containerHeight / lowNumRows * tileHeight;
var horizontalScale = containerWidth / (highBoundColumns * tileWidth);
var maxHorizontalArea = (horizontalScale * tileWidth) * ((horizontalScale * tileWidth) / aspectRatio);
var maxVerticalArea = (verticalScale * tileHeight) * ((verticalScale * tileHeight) * aspectRatio);
if (maxHorizontalArea >= maxVerticalArea){
newTileWidth = containerWidth / highBoundColumns;
newTileHeight = newTileWidth / aspectRatio;
if (newTileHeight * Math.ceil(numTiles / highBoundColumns) > containerHeight){
var newHeight = containerHeight / highNumRows;
var newWidth = newHeight * aspectRatio;
if (newWidth * numTiles < containerWidth){
newWidth = containerWidth / Math.ceil(numColumns++);
newHeight = newWidth / aspectRatio;
while (newWidth * numTiles > containerWidth){
newWidth = containerWidth / Math.ceil(numColumns++);
newHeight = newWidth / aspectRatio;
}
if (newHeight > containerHeight){
newHeight = containerHeight;
newWidth = newHeight * aspectRatio;
}
}
var currentCols = Math.floor(containerWidth / newWidth);
var currentRows = Math.ceil(numTiles/currentCols);
if ( (newWidth * currentCols ) < containerWidth
&& ( newHeight * Math.ceil(numTiles/currentCols) ) < containerHeight){
newWidth = containerWidth / currentCols;
newHeight = newTileWidth / aspectRatio;
if (newHeight * Math.ceil(numTiles / currentCols) > containerHeight)
{
newHeight = containerHeight / currentRows;
newWidth = newHeight * aspectRatio;
}
}
newTileHeight = newHeight;
newTileWidth = newWidth;
}
}
else
{
newTileHeight = containerHeight / lowNumRows;
newTileWidth = newTileHeight * aspectRatio;
}
var numCols = Math.floor(containerWidth / newTileWidth);
var numRows = Math.ceil(numTiles / numCols);
var gridSize = numCols * numRows;
return {height: newTileHeight, width: newTileWidth, columns: numCols, rows: numRows, gridSize: gridSize};
};
})(jQuery);