opentok-layout-js
Version:
Automatic layout of video elements (publisher and subscriber) minimising white-space for the OpenTok on WebRTC API. This is intended for use with the OpenTok on WebRTC JS API.
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JavaScript
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/// <reference path="../types/opentok-layout-js.d.ts" />
exports.__esModule = true;
var getBestDimensions = function (minRatio, maxRatio, Width, Height, count, maxWidth, maxHeight, evenRows) {
var maxArea;
var targetCols;
var targetRows;
var targetHeight;
var targetWidth;
var tWidth;
var tHeight;
var tRatio;
// Iterate through every possible combination of rows and columns
// and see which one has the least amount of whitespace
for (var i = 1; i <= count; i += 1) {
var cols = i;
var rows = Math.ceil(count / cols);
// Try taking up the whole height and width
tHeight = Math.floor(Height / rows);
tWidth = Math.floor(Width / cols);
tRatio = tHeight / tWidth;
if (tRatio > maxRatio) {
// We went over decrease the height
tRatio = maxRatio;
tHeight = tWidth * tRatio;
}
else if (tRatio < minRatio) {
// We went under decrease the width
tRatio = minRatio;
tWidth = tHeight / tRatio;
}
tWidth = Math.min(maxWidth, tWidth);
tHeight = Math.min(maxHeight, tHeight);
var area = (tWidth * tHeight) * count;
// If this width and height takes up the most space then we're going with that
if (maxArea === undefined || (area >= maxArea)) {
if (evenRows && area === maxArea && ((cols * rows) % count) > ((targetRows * targetCols) % count)) {
// We have the same area but there are more left over spots in the last row
// Let's keep the previous one
continue;
}
maxArea = area;
targetHeight = tHeight;
targetWidth = tWidth;
targetCols = cols;
targetRows = rows;
}
}
return {
maxArea: maxArea,
targetCols: targetCols,
targetRows: targetRows,
targetHeight: targetHeight,
targetWidth: targetWidth,
ratio: targetHeight / targetWidth
};
};
var getLayout = function (opts, elements) {
var maxRatio = opts.maxRatio, minRatio = opts.minRatio, fixedRatio = opts.fixedRatio, containerWidth = opts.containerWidth, containerHeight = opts.containerHeight, _a = opts.offsetLeft, offsetLeft = _a === void 0 ? 0 : _a, _b = opts.offsetTop, offsetTop = _b === void 0 ? 0 : _b, _c = opts.alignItems, alignItems = _c === void 0 ? 'center' : _c, _d = opts.maxWidth, maxWidth = _d === void 0 ? Infinity : _d, _e = opts.maxHeight, maxHeight = _e === void 0 ? Infinity : _e, _f = opts.scaleLastRow, scaleLastRow = _f === void 0 ? true : _f, _g = opts.evenRows, evenRows = _g === void 0 ? true : _g;
var ratios = elements.map(function (element) { return element.height / element.width; });
var count = ratios.length;
var dimensions;
if (!fixedRatio) {
dimensions = getBestDimensions(minRatio, maxRatio, containerWidth, containerHeight, count, maxWidth, maxHeight, evenRows);
}
else {
// Use the ratio of the first video element we find to approximate
var ratio = ratios.length > 0 ? ratios[0] : null;
dimensions = getBestDimensions(ratio, ratio, containerWidth, containerHeight, count, maxWidth, maxHeight, evenRows);
}
// Loop through each stream in the container and place it inside
var x = 0;
var y = 0;
var rows = [];
var row;
var boxes = [];
// Iterate through the children and create an array with a new item for each row
// and calculate the width of each row so that we know if we go over the size and need
// to adjust
for (var i = 0; i < ratios.length; i += 1) {
if (i % dimensions.targetCols === 0) {
// This is a new row
row = {
ratios: [],
elements: [],
width: 0,
height: 0
};
rows.push(row);
}
var ratio = ratios[i];
var element = elements[i];
row.elements.push(element);
row.ratios.push(ratio);
var targetWidth = dimensions.targetWidth;
var targetHeight = dimensions.targetHeight;
// If we're using a fixedRatio then we need to set the correct ratio for this element
if (fixedRatio || element.fixedRatio) {
targetWidth = targetHeight / ratio;
}
row.width += targetWidth;
row.height = targetHeight;
}
// Calculate total row height adjusting if we go too wide
var totalRowHeight = 0;
var remainingShortRows = 0;
for (var i = 0; i < rows.length; i += 1) {
row = rows[i];
if (row.width > containerWidth) {
// Went over on the width, need to adjust the height proportionally
row.height = Math.floor(row.height * (containerWidth / row.width));
row.width = containerWidth;
}
else if (row.width < containerWidth && row.height < maxHeight) {
remainingShortRows += 1;
}
totalRowHeight += row.height;
}
if (scaleLastRow && totalRowHeight < containerHeight && remainingShortRows > 0) {
// We can grow some of the rows, we're not taking up the whole height
var remainingHeightDiff = containerHeight - totalRowHeight;
totalRowHeight = 0;
for (var i = 0; i < rows.length; i += 1) {
row = rows[i];
if (row.width < containerWidth) {
// Evenly distribute the extra height between the short rows
var extraHeight = remainingHeightDiff / remainingShortRows;
if ((extraHeight / row.height) > ((containerWidth - row.width) / row.width)) {
// We can't go that big or we'll go too wide
extraHeight = Math.floor(((containerWidth - row.width) / row.width) * row.height);
}
row.width += Math.floor((extraHeight / row.height) * row.width);
row.height += extraHeight;
remainingHeightDiff -= extraHeight;
remainingShortRows -= 1;
}
totalRowHeight += row.height;
}
}
switch (alignItems) {
case 'start':
y = 0;
break;
case 'end':
y = containerHeight - totalRowHeight;
break;
case 'center':
default:
y = ((containerHeight - (totalRowHeight)) / 2);
break;
}
// Iterate through each row and place each child
for (var i = 0; i < rows.length; i += 1) {
row = rows[i];
var rowMarginLeft = void 0;
switch (alignItems) {
case 'start':
rowMarginLeft = 0;
break;
case 'end':
rowMarginLeft = containerWidth - row.width;
break;
case 'center':
default:
rowMarginLeft = ((containerWidth - row.width) / 2);
break;
}
x = rowMarginLeft;
var targetHeight = void 0;
for (var j = 0; j < row.ratios.length; j += 1) {
var ratio = row.ratios[j];
var element = row.elements[j];
var targetWidth = dimensions.targetWidth;
targetHeight = row.height;
// If we're using a fixedRatio then we need to set the correct ratio for this element
if (fixedRatio || element.fixedRatio) {
targetWidth = Math.floor(targetHeight / ratio);
}
else if ((targetHeight / targetWidth)
!== (dimensions.targetHeight / dimensions.targetWidth)) {
// We grew this row, we need to adjust the width to account for the increase in height
targetWidth = Math.floor((dimensions.targetWidth / dimensions.targetHeight) * targetHeight);
}
boxes.push({
left: x + offsetLeft,
top: y + offsetTop,
width: targetWidth,
height: targetHeight
});
x += targetWidth;
}
y += targetHeight;
}
return boxes;
};
var getVideoRatio = function (element) { return element.height / element.width; };
exports["default"] = (function (opts, elements) {
var _a = opts.maxRatio, maxRatio = _a === void 0 ? 3 / 2 : _a, _b = opts.minRatio, minRatio = _b === void 0 ? 9 / 16 : _b, _c = opts.fixedRatio, fixedRatio = _c === void 0 ? false : _c, _d = opts.bigPercentage, bigPercentage = _d === void 0 ? 0.8 : _d, _e = opts.minBigPercentage, minBigPercentage = _e === void 0 ? 0 : _e, _f = opts.bigFixedRatio, bigFixedRatio = _f === void 0 ? false : _f, _g = opts.bigMaxRatio, bigMaxRatio = _g === void 0 ? 3 / 2 : _g, _h = opts.bigMinRatio, bigMinRatio = _h === void 0 ? 9 / 16 : _h, _j = opts.bigFirst, bigFirst = _j === void 0 ? true : _j, _k = opts.containerWidth, containerWidth = _k === void 0 ? 640 : _k, _l = opts.containerHeight, containerHeight = _l === void 0 ? 480 : _l, _m = opts.alignItems, alignItems = _m === void 0 ? 'center' : _m, _o = opts.bigAlignItems, bigAlignItems = _o === void 0 ? 'center' : _o, _p = opts.smallAlignItems, smallAlignItems = _p === void 0 ? 'center' : _p, _q = opts.maxWidth, maxWidth = _q === void 0 ? Infinity : _q, _r = opts.maxHeight, maxHeight = _r === void 0 ? Infinity : _r, _s = opts.smallMaxWidth, smallMaxWidth = _s === void 0 ? Infinity : _s, _t = opts.smallMaxHeight, smallMaxHeight = _t === void 0 ? Infinity : _t, _u = opts.bigMaxWidth, bigMaxWidth = _u === void 0 ? Infinity : _u, _v = opts.bigMaxHeight, bigMaxHeight = _v === void 0 ? Infinity : _v, _w = opts.scaleLastRow, scaleLastRow = _w === void 0 ? true : _w, _x = opts.bigScaleLastRow, bigScaleLastRow = _x === void 0 ? true : _x, _y = opts.evenRows, evenRows = _y === void 0 ? true : _y;
var availableRatio = containerHeight / containerWidth;
var offsetLeft = 0;
var offsetTop = 0;
var bigOffsetTop = 0;
var bigOffsetLeft = 0;
var bigIndices = [];
var bigOnes = elements.filter(function (element, idx) {
if (element.big) {
bigIndices.push(idx);
return true;
}
return false;
});
var smallOnes = elements.filter(function (element) { return !element.big; });
var bigBoxes = [];
var smallBoxes = [];
var areas = {};
if (bigOnes.length > 0 && smallOnes.length > 0) {
var bigWidth = void 0;
var bigHeight = void 0;
var showBigFirst = bigFirst === true;
if (availableRatio > getVideoRatio(bigOnes[0])) {
// We are tall, going to take up the whole width and arrange small
// guys at the bottom
bigWidth = containerWidth;
bigHeight = Math.floor(containerHeight * bigPercentage);
if (minBigPercentage > 0) {
// Find the best size for the big area
var bigDimensions = void 0;
if (!bigFixedRatio) {
bigDimensions = getBestDimensions(bigMinRatio, bigMaxRatio, bigWidth, bigHeight, bigOnes.length, bigMaxWidth, bigMaxHeight, evenRows);
}
else {
// Use the ratio of the first video element we find to approximate
var ratio = bigOnes[0].height / bigOnes[0].width;
bigDimensions = getBestDimensions(ratio, ratio, bigWidth, bigHeight, bigOnes.length, bigMaxWidth, bigMaxHeight, evenRows);
}
bigHeight = Math.max(containerHeight * minBigPercentage, Math.min(bigHeight, bigDimensions.targetHeight * bigDimensions.targetRows));
// Don't awkwardly scale the small area bigger than we need to and end up with floating
// videos in the middle
var smallBoxes_1 = getLayout({
containerWidth: containerWidth,
containerHeight: containerHeight - bigHeight,
offsetLeft: 0,
offsetTop: 0,
fixedRatio: fixedRatio,
minRatio: minRatio,
maxRatio: maxRatio,
alignItems: smallAlignItems,
maxWidth: smallMaxWidth,
maxHeight: smallMaxHeight,
scaleLastRow: scaleLastRow,
evenRows: evenRows
}, smallOnes);
var smallHeight_1 = 0;
var currentTop_1 = undefined;
smallBoxes_1.forEach(function (box) {
if (currentTop_1 !== box.top) {
currentTop_1 = box.top;
smallHeight_1 += box.height;
}
});
bigHeight = Math.max(bigHeight, containerHeight - smallHeight_1);
}
offsetTop = bigHeight;
bigOffsetTop = containerHeight - offsetTop;
if (bigFirst === 'column') {
showBigFirst = false;
}
else if (bigFirst === 'row') {
showBigFirst = true;
}
}
else {
// We are wide, going to take up the whole height and arrange the small
// guys on the right
bigHeight = containerHeight;
bigWidth = Math.floor(containerWidth * bigPercentage);
if (minBigPercentage > 0) {
// Find the best size for the big area
var bigDimensions = void 0;
if (!bigFixedRatio) {
bigDimensions = getBestDimensions(bigMinRatio, bigMaxRatio, bigWidth, bigHeight, bigOnes.length, bigMaxWidth, bigMaxHeight, evenRows);
}
else {
// Use the ratio of the first video element we find to approximate
var ratio = bigOnes[0].height / bigOnes[0].width;
bigDimensions = getBestDimensions(ratio, ratio, bigWidth, bigHeight, bigOnes.length, bigMaxWidth, bigMaxHeight, evenRows);
}
bigWidth = Math.max(containerWidth * minBigPercentage, Math.min(bigWidth, bigDimensions.targetWidth * bigDimensions.targetCols));
// Don't awkwardly scale the small area bigger than we need to and end up with floating
// videos in the middle
var smallBoxes_2 = getLayout({
containerWidth: containerWidth - bigWidth,
containerHeight: containerHeight,
offsetLeft: 0,
offsetTop: 0,
fixedRatio: fixedRatio,
minRatio: minRatio,
maxRatio: maxRatio,
alignItems: smallAlignItems,
maxWidth: smallMaxWidth,
maxHeight: smallMaxHeight,
scaleLastRow: scaleLastRow,
evenRows: evenRows
}, smallOnes);
var smallWidth_1 = 0;
var currentWidth_1 = 0;
var top_1 = 0;
smallBoxes_2.forEach(function (box) {
if (box.top !== top_1) {
currentWidth_1 = 0;
top_1 = box.top;
}
currentWidth_1 += box.width;
smallWidth_1 = Math.max(smallWidth_1, currentWidth_1);
});
bigWidth = Math.max(bigWidth, containerWidth - smallWidth_1);
}
offsetLeft = bigWidth;
bigOffsetLeft = containerWidth - offsetLeft;
if (bigFirst === 'column') {
showBigFirst = true;
}
else if (bigFirst === 'row') {
showBigFirst = false;
}
}
if (showBigFirst) {
areas.big = {
top: 0,
left: 0,
width: bigWidth,
height: bigHeight
};
areas.small = {
top: offsetTop,
left: offsetLeft,
width: containerWidth - offsetLeft,
height: containerHeight - offsetTop
};
}
else {
areas.big = {
left: bigOffsetLeft,
top: bigOffsetTop,
width: bigWidth,
height: bigHeight
};
areas.small = {
top: 0,
left: 0,
width: containerWidth - offsetLeft,
height: containerHeight - offsetTop
};
}
}
else if (bigOnes.length > 0 && smallOnes.length === 0) {
// We only have one bigOne just center it
areas.big = {
top: 0,
left: 0,
width: containerWidth,
height: containerHeight
};
}
else {
areas.small = {
top: offsetTop,
left: offsetLeft,
width: containerWidth - offsetLeft,
height: containerHeight - offsetTop
};
}
if (areas.big) {
bigBoxes = getLayout({
containerWidth: areas.big.width,
containerHeight: areas.big.height,
offsetLeft: areas.big.left,
offsetTop: areas.big.top,
fixedRatio: bigFixedRatio,
minRatio: bigMinRatio,
maxRatio: bigMaxRatio,
alignItems: bigAlignItems,
maxWidth: bigMaxWidth,
maxHeight: bigMaxHeight,
scaleLastRow: bigScaleLastRow,
evenRows: evenRows
}, bigOnes);
}
if (areas.small) {
smallBoxes = getLayout({
containerWidth: areas.small.width,
containerHeight: areas.small.height,
offsetLeft: areas.small.left,
offsetTop: areas.small.top,
fixedRatio: fixedRatio,
minRatio: minRatio,
maxRatio: maxRatio,
alignItems: areas.big ? smallAlignItems : alignItems,
maxWidth: areas.big ? smallMaxWidth : maxWidth,
maxHeight: areas.big ? smallMaxHeight : maxHeight,
scaleLastRow: scaleLastRow,
evenRows: evenRows
}, smallOnes);
}
var boxes = [];
var bigBoxesIdx = 0;
var smallBoxesIdx = 0;
// Rebuild the array in the right order based on where the bigIndices should be
elements.forEach(function (element, idx) {
if (bigIndices.indexOf(idx) > -1) {
boxes[idx] = bigBoxes[bigBoxesIdx];
bigBoxesIdx += 1;
}
else {
boxes[idx] = smallBoxes[smallBoxesIdx];
smallBoxesIdx += 1;
}
});
return { boxes: boxes, areas: areas };
});
/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/// <reference path="../types/opentok-layout-js.d.ts" />
/*!
* opentok-layout-js (http://github.com/aullman/opentok-layout-js)
*
* Automatic layout of video elements (publisher and subscriber) minimising
* white-space for the OpenTok on WebRTC API.
*
* @Author: Adam Ullman (http://github.com/aullman)
* @Copyright (c) 2014 Adam Ullman
* @License: Released under the MIT license (http://opensource.org/licenses/MIT)
* */
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
exports.__esModule = true;
// in CommonJS context, this should be a `require()`d dependency.
// in browser globals context, ...? (when using bower, there are dependencies that it has handled
// for you, so these might be safe to assume)
var getLayout_1 = __webpack_require__(0);
var layout_1 = __webpack_require__(2);
module.exports = function initLayoutContainer(container, options) {
var _this = this;
var opts = options;
var win = (opts && opts.window) || (typeof window === 'undefined' ? undefined : window);
container = typeof container === 'string' ? win.document.querySelector(container) : container;
if (!(typeof (win && win.HTMLElement) === 'undefined' || container instanceof win.HTMLElement) && !opts) {
// container is actually the options
opts = container;
}
else if (!opts) {
opts = {};
}
var setOptions = function (newOptions) {
opts = newOptions;
};
return {
layout: function () {
return layout_1["default"].apply(_this, [container, opts]);
},
getLayout: function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
return getLayout_1["default"].apply(_this, __spreadArray([opts], args, true));
},
setOptions: setOptions
};
};
/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
"use strict";
/// <reference path="../types/opentok-layout-js.d.ts" />
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
exports.__esModule = true;
var getLayout_1 = __webpack_require__(0);
exports["default"] = (function (container, opts) {
function css(el, propertyName, value) {
if (typeof propertyName === 'string' && value) {
// We are setting one css property
el.style[propertyName] = value;
return NaN;
}
if (typeof propertyName === 'object') {
// We are setting several CSS properties at once
Object.keys(propertyName).forEach(function (key) {
css(el, key, propertyName[key]);
});
return NaN;
}
// We are getting the css property
var computedStyle = ((opts && opts.window) || window).getComputedStyle(el);
var currentValue = computedStyle.getPropertyValue(propertyName);
if (currentValue === '') {
currentValue = el.style[propertyName];
}
return currentValue;
}
var filterDisplayNone = function (element) { return css(element, 'display') !== 'none'; };
function height(el) {
if (el.offsetHeight > 0) {
return "".concat(el.offsetHeight, "px");
}
return css(el, 'height');
}
function width(el) {
if (el.offsetWidth > 0) {
return "".concat(el.offsetWidth, "px");
}
return css(el, 'width');
}
var positionElement = function positionElement(elem, x, y, w, h, animate, onLayout) {
var _this = this;
var targetPosition = {
left: "".concat(x, "px"),
top: "".concat(y, "px"),
width: "".concat(w, "px"),
height: "".concat(h, "px")
};
var fixAspectRatio = function fixAspectRatio() {
var sub = elem.querySelector('.OT_root');
if (sub) {
// If this is the parent of a subscriber or publisher then we need
// to force the mutation observer on the publisher or subscriber to
// trigger to get it to fix it's layout
var oldWidth = sub.style.width;
sub.style.width = "".concat(w, "px");
// sub.style.height = height + 'px';
sub.style.width = oldWidth || '';
}
};
if (animate && typeof $ !== 'undefined') {
$(elem).stop();
var animateProps_1 = typeof animate === 'boolean' ? { duration: 200, easing: 'swing' } : animate;
$(elem).animate(targetPosition, animateProps_1.duration, animateProps_1.easing, function () {
fixAspectRatio();
if (animateProps_1.complete)
animateProps_1.complete.call(_this);
if (onLayout) {
onLayout(elem, {
left: x,
top: y,
width: w,
height: h
});
}
});
}
else {
css(elem, targetPosition);
if (!elem.classList.contains('ot-layout')) {
elem.classList.add('ot-layout');
}
if (onLayout) {
onLayout(elem, {
left: x,
top: y,
width: w,
height: h
});
}
}
fixAspectRatio();
};
var getChildDims = function getChildDims(child) {
if (child) {
if (child.videoHeight && child.videoWidth) {
return {
height: child.videoHeight,
width: child.videoWidth
};
}
var video = child.querySelector('video');
if (video && video.videoHeight && video.videoWidth) {
return {
height: video.videoHeight,
width: video.videoWidth
};
}
}
return {
height: 480,
width: 640
};
};
var getCSSNumber = function getCSSNumber(elem, prop) {
var cssStr = css(elem, prop);
return cssStr ? parseInt(cssStr, 10) : 0;
};
// Really cheap UUID function
var cheapUUID = function cheapUUID() {
return (Math.random() * 100000000).toFixed(0);
};
var getHeight = function getHeight(elem) {
var heightStr = height(elem);
return heightStr ? parseInt(heightStr, 10) : 0;
};
var getWidth = function getWidth(elem) {
var widthStr = width(elem);
return widthStr ? parseInt(widthStr, 10) : 0;
};
var _a = opts.animate, animate = _a === void 0 ? false : _a, _b = opts.bigClass, bigClass = _b === void 0 ? 'OT_big' : _b, _c = opts.ignoreClass, ignoreClass = _c === void 0 ? 'OT_ignore' : _c, _d = opts.fixedRatioClass, fixedRatioClass = _d === void 0 ? 'OT_fixedRatio' : _d;
if (css(container, 'display') === 'none') {
return;
}
var id = container.getAttribute('id');
if (!id) {
id = "OT_".concat(cheapUUID());
container.setAttribute('id', id);
}
opts.containerHeight = getHeight(container)
- getCSSNumber(container, 'border-top')
- getCSSNumber(container, 'border-bottom');
opts.containerWidth = getWidth(container)
- getCSSNumber(container, 'border-left')
- getCSSNumber(container, 'border-right');
var children = Array.prototype.filter.call(container.querySelectorAll("#".concat(id, ">*:not(.").concat(ignoreClass, ")")), filterDisplayNone);
var elements = children.map(function (element) {
return __assign(__assign({}, getChildDims(element)), { big: element.classList.contains(bigClass), fixedRatio: element.classList.contains(fixedRatioClass) });
});
var layout = (0, getLayout_1["default"])(opts, elements);
layout.boxes.forEach(function (box, idx) {
var elem = children[idx];
css(elem, 'position', 'absolute');
var actualWidth = box.width
- getCSSNumber(elem, 'margin-left')
- getCSSNumber(elem, 'margin-right')
- (css(elem, 'box-sizing') !== 'border-box'
? (getCSSNumber(elem, 'padding-left')
+ getCSSNumber(elem, 'padding-right')
+ getCSSNumber(elem, 'border-left')
+ getCSSNumber(elem, 'border-right'))
: 0);
var actualHeight = box.height
- getCSSNumber(elem, 'margin-top')
- getCSSNumber(elem, 'margin-bottom')
- (css(elem, 'box-sizing') !== 'border-box'
? (getCSSNumber(elem, 'padding-top')
+ getCSSNumber(elem, 'padding-bottom')
+ getCSSNumber(elem, 'border-top')
+ getCSSNumber(elem, 'border-bottom'))
: 0);
positionElement(elem, box.left, box.top, actualWidth, actualHeight, animate, opts.onLayout);
});
});
/***/ })
/******/ ]);
});