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ROOT_ELEMENT = 'OT_root',
BIG_ELEMENT = 'OV_big',
SMALL_ELEMENT = 'OV_small',
SIDENAV_CONTAINER = 'sidenav-container'
}
export enum SidenavMode {
OVER = 'over',
SIDE = 'side'
}
/**
* @hidden
*/
export interface OpenViduLayoutOptions {
/**
* The narrowest ratio that will be used (*2x3* by default)
*/
maxRatio: number;
/**
* The widest ratio that will be used (*16x9* by default)
*/
minRatio: number;
/**
* If this is true then the aspect ratio of the video is maintained and minRatio and maxRatio are ignored (*false* by default)
*/
fixedRatio: boolean;
/**
* Whether you want to animate the transitions
*/
animate: any;
/**
* The class to add to elements that should be sized bigger
*/
bigClass: string;
/**
* The class to add to elements that should be sized smaller
*/
smallClass: string;
/**
* The maximum percentage of space the big ones should take up
*/
bigPercentage: any;
/**
* FixedRatio for the big ones
*/
bigFixedRatio: any;
/**
* The narrowest ratio to use for the big elements (*2x3* by default)
*/
bigMaxRatio: any;
/**
* The widest ratio to use for the big elements (*16x9* by default)
*/
bigMinRatio: any;
/**
* Whether to place the big one in the top left `true` or bottom right
*/
bigFirst: any;
}
export class OpenViduLayout {
/**
* @hidden
*/
private layoutContainer: HTMLElement;
/**
* @hidden
*/
private opts: OpenViduLayoutOptions;
/**
* Update the layout container
*/
updateLayout() {
setTimeout(() => {
if (this.layoutContainer?.style?.display === 'none') {
return;
}
let id = this.layoutContainer.id;
if (!id) {
id = 'OT_' + this.cheapUUID();
this.layoutContainer.id = id;
}
const smallOnes: HTMLVideoElement[] = Array.prototype.filter.call(
this.layoutContainer.querySelectorAll('#' + id + '>.' + this.opts.smallClass),
this.filterDisplayNone
);
const bigOnes: HTMLVideoElement[] = Array.prototype.filter
.call(this.layoutContainer.querySelectorAll('#' + id + '>.' + this.opts.bigClass), this.filterDisplayNone)
.filter((x) => !smallOnes.includes(x));
const normalOnes: HTMLVideoElement[] = Array.prototype.filter
.call(this.layoutContainer.querySelectorAll('#' + id + '>*:not(.' + this.opts.bigClass + ')'), this.filterDisplayNone)
.filter((x) => !smallOnes.includes(x));
this.attachElements(bigOnes, normalOnes, smallOnes);
}, 50);
}
/**
* Initialize the layout inside of the container with the options required
* @param container
* @param opts
*/
initLayoutContainer(container: HTMLElement, opts: OpenViduLayoutOptions) {
this.opts = {
maxRatio: opts.maxRatio != null ? opts.maxRatio : 3 / 2,
minRatio: opts.minRatio != null ? opts.minRatio : 9 / 16,
fixedRatio: opts.fixedRatio != null ? opts.fixedRatio : false,
animate: opts.animate != null ? opts.animate : false,
bigClass: opts.bigClass != null ? opts.bigClass : 'OT_big',
smallClass: opts.smallClass != null ? opts.smallClass : 'OT_small',
bigPercentage: opts.bigPercentage != null ? opts.bigPercentage : 0.8,
bigFixedRatio: opts.bigFixedRatio != null ? opts.bigFixedRatio : false,
bigMaxRatio: opts.bigMaxRatio != null ? opts.bigMaxRatio : 3 / 2,
bigMinRatio: opts.bigMinRatio != null ? opts.bigMinRatio : 9 / 16,
bigFirst: opts.bigFirst != null ? opts.bigFirst : true
};
this.layoutContainer = container;
}
/**
* Set the layout configuration
* @param options
*/
setLayoutOptions(options: OpenViduLayoutOptions) {
this.opts = options;
}
getLayoutContainer(): HTMLElement {
return this.layoutContainer
}
/**
* @hidden
*/
private fixAspectRatio(elem: HTMLVideoElement, width: number) {
const sub: HTMLVideoElement = <HTMLVideoElement>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
const oldWidth = sub.style.width;
sub.style.width = width + 'px';
// sub.style.height = height + 'px';
sub.style.width = oldWidth || '';
}
}
/**
* @hidden
*/
private positionElement(elem: HTMLVideoElement, x: number, y: number, width: number, height: number, animate: any) {
const targetPosition = {
left: x + 'px',
top: y + 'px',
width: width + 'px',
height: height + 'px'
};
this.fixAspectRatio(elem, width);
setTimeout(() => {
// animation added in css transition: all .1s linear;
elem.style.left = targetPosition.left;
elem.style.top = targetPosition.top;
elem.style.width = targetPosition.width;
elem.style.height = targetPosition.height;
this.fixAspectRatio(elem, width);
}, 10);
}
/**
* @hidden
*/
private getVideoRatio(elem: HTMLVideoElement) {
if (!elem) {
return 3 / 4;
}
const video: HTMLVideoElement = <HTMLVideoElement>elem.querySelector('video');
if (video && video.videoHeight && video.videoWidth) {
return video.videoHeight / video.videoWidth;
} else if (elem.videoHeight && elem.videoWidth) {
return elem.videoHeight / elem.videoWidth;
}
return 3 / 4;
}
/**
* @hidden
*/
private getCSSNumber(elem: HTMLElement, prop: string) {
const cssStr = window.getComputedStyle(elem)[prop];
return cssStr ? parseInt(cssStr, 10) : 0;
}
/**
* @hidden
*/
// Really cheap UUID function
private cheapUUID() {
return (Math.random() * 100000000).toFixed(0);
}
/**
* @hidden
*/
private getHeight(elem: HTMLElement) {
const heightStr = window.getComputedStyle(elem)['height'];
return heightStr ? parseInt(heightStr, 10) : 0;
}
/**
* @hidden
*/
private getWidth(elem: HTMLElement) {
const widthStr = window.getComputedStyle(elem)['width'];
return widthStr ? parseInt(widthStr, 10) : 0;
}
/**
* @hidden
*/
private getBestDimensions(minR: number, maxR: number, count: number, WIDTH: number, HEIGHT: number, targetHeight: number) {
let maxArea, targetCols, targetRows, targetWidth, tWidth, tHeight, tRatio;
// Iterate through every possible combination of rows and columns
// and see which one has the least amount of whitespace
for (let i = 1; i <= count; i++) {
const colsAux = i;
const rowsAux = Math.ceil(count / colsAux);
// Try taking up the whole height and width
tHeight = Math.floor(HEIGHT / rowsAux);
tWidth = Math.floor(WIDTH / colsAux);
tRatio = tHeight / tWidth;
if (tRatio > maxR) {
// We went over decrease the height
tRatio = maxR;
tHeight = tWidth * tRatio;
} else if (tRatio < minR) {
// We went under decrease the width
tRatio = minR;
tWidth = tHeight / tRatio;
}
const 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) {
maxArea = area;
targetHeight = tHeight;
targetWidth = tWidth;
targetCols = colsAux;
targetRows = rowsAux;
}
}
return {
maxArea: maxArea,
targetCols: targetCols,
targetRows: targetRows,
targetHeight: targetHeight,
targetWidth: targetWidth,
ratio: targetHeight / targetWidth
};
}
/**
* @hidden
*/
private arrange(
children: HTMLVideoElement[],
WIDTH: number,
HEIGHT: number,
offsetLeft: number,
offsetTop: number,
fixedRatio: boolean,
minRatio: number,
maxRatio: number,
animate: any
) {
let targetHeight;
const count = children.length;
let dimensions;
if (!fixedRatio) {
dimensions = this.getBestDimensions(minRatio, maxRatio, count, WIDTH, HEIGHT, targetHeight);
} else {
// Use the ratio of the first video element we find to approximate
const ratio = this.getVideoRatio(children.length > 0 ? children[0] : null);
dimensions = this.getBestDimensions(ratio, ratio, count, WIDTH, HEIGHT, targetHeight);
}
// Loop through each stream in the container and place it inside
let x = 0,
y = 0;
const rows = [];
let row;
// 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 (let i = 0; i < children.length; i++) {
if (i % dimensions.targetCols === 0) {
// This is a new row
row = {
children: [],
width: 0,
height: 0
};
rows.push(row);
}
const elem: HTMLVideoElement = children[i];
row.children.push(elem);
let targetWidth = dimensions.targetWidth;
targetHeight = dimensions.targetHeight;
// If we're using a fixedRatio then we need to set the correct ratio for this element
if (fixedRatio) {
targetWidth = targetHeight / this.getVideoRatio(elem);
}
row.width += targetWidth;
row.height = targetHeight;
}
// Calculate total row height adjusting if we go too wide
let totalRowHeight = 0;
let remainingShortRows = 0;
for (let i = 0; i < rows.length; i++) {
row = rows[i];
if (row.width > WIDTH) {
// Went over on the width, need to adjust the height proportionally
row.height = Math.floor(row.height * (WIDTH / row.width));
row.width = WIDTH;
} else if (row.width < WIDTH) {
remainingShortRows += 1;
}
totalRowHeight += row.height;
}
if (totalRowHeight < HEIGHT && remainingShortRows > 0) {
// We can grow some of the rows, we're not taking up the whole height
let remainingHeightDiff = HEIGHT - totalRowHeight;
totalRowHeight = 0;
for (let i = 0; i < rows.length; i++) {
row = rows[i];
if (row.width < WIDTH) {
// Evenly distribute the extra height between the short rows
let extraHeight = remainingHeightDiff / remainingShortRows;
if (extraHeight / row.height > (WIDTH - row.width) / row.width) {
// We can't go that big or we'll go too wide
extraHeight = Math.floor(((WIDTH - 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;
}
}
// vertical centering
y = (HEIGHT - totalRowHeight) / 2;
// Iterate through each row and place each child
for (let i = 0; i < rows.length; i++) {
row = rows[i];
// center the row
const rowMarginLeft = (WIDTH - row.width) / 2;
x = rowMarginLeft;
for (let j = 0; j < row.children.length; j++) {
const elem: HTMLVideoElement = row.children[j];
let 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) {
targetWidth = Math.floor(targetHeight / this.getVideoRatio(elem));
}
elem.style.position = 'absolute';
// $(elem).css('position', 'absolute');
const actualWidth =
targetWidth -
this.getCSSNumber(elem, 'paddingLeft') -
this.getCSSNumber(elem, 'paddingRight') -
this.getCSSNumber(elem, 'marginLeft') -
this.getCSSNumber(elem, 'marginRight') -
this.getCSSNumber(elem, 'borderLeft') -
this.getCSSNumber(elem, 'borderRight');
const actualHeight =
targetHeight -
this.getCSSNumber(elem, 'paddingTop') -
this.getCSSNumber(elem, 'paddingBottom') -
this.getCSSNumber(elem, 'marginTop') -
this.getCSSNumber(elem, 'marginBottom') -
this.getCSSNumber(elem, 'borderTop') -
this.getCSSNumber(elem, 'borderBottom');
this.positionElement(elem, x + offsetLeft, y + offsetTop, actualWidth, actualHeight, animate);
x += targetWidth;
}
y += targetHeight;
}
}
/**
* @hidden
*/
private attachElements(bigOnes: HTMLVideoElement[], normalOnes: HTMLVideoElement[], smallOnes: HTMLVideoElement[]) {
const HEIGHT =
this.getHeight(this.layoutContainer) -
this.getCSSNumber(this.layoutContainer, 'borderTop') -
this.getCSSNumber(this.layoutContainer, 'borderBottom');
const WIDTH =
this.getWidth(this.layoutContainer) -
this.getCSSNumber(this.layoutContainer, 'borderLeft') -
this.getCSSNumber(this.layoutContainer, 'borderRight');
const offsetLeft = 0;
const offsetTop = 0;
if (this.existBigAndNormalOnes(bigOnes, normalOnes, smallOnes)) {
const smallOnesAux = smallOnes.length > 0 ? smallOnes : normalOnes;
const bigOnesAux = bigOnes.length > 0 ? bigOnes : normalOnes;
this.arrangeBigAndSmallOnes(bigOnesAux, smallOnesAux);
} else if (this.onlyExistBigOnes(bigOnes, normalOnes, smallOnes)) {
// We only have one bigOne just center it
this.arrange(
bigOnes,
WIDTH,
HEIGHT,
0,
0,
this.opts.bigFixedRatio,
this.opts.bigMinRatio,
this.opts.bigMaxRatio,
this.opts.animate
);
} else if (this.existBigAndNormalAndSmallOnes(bigOnes, normalOnes, smallOnes)) {
this.arrangeBigAndSmallOnes(bigOnes, normalOnes.concat(smallOnes));
} else {
const normalOnesAux = normalOnes.concat(smallOnes);
this.arrange(
normalOnesAux,
WIDTH - offsetLeft,
HEIGHT - offsetTop,
offsetLeft,
offsetTop,
this.opts.fixedRatio,
this.opts.minRatio,
this.opts.maxRatio,
this.opts.animate
);
}
}
/**
* @hidden
*/
private arrangeBigAndSmallOnes(bigOnesAux: HTMLVideoElement[], smallOnesAux: HTMLVideoElement[]) {
const HEIGHT =
this.getHeight(this.layoutContainer) -
this.getCSSNumber(this.layoutContainer, 'borderTop') -
this.getCSSNumber(this.layoutContainer, 'borderBottom');
const WIDTH =
this.getWidth(this.layoutContainer) -
this.getCSSNumber(this.layoutContainer, 'borderLeft') -
this.getCSSNumber(this.layoutContainer, 'borderRight');
const availableRatio = HEIGHT / WIDTH;
let offsetLeft = 0;
let offsetTop = 0;
let bigOffsetTop = 0;
let bigOffsetLeft = 0;
let bigWidth, bigHeight;
if (availableRatio > this.getVideoRatio(bigOnesAux[0])) {
// We are tall, going to take up the whole width and arrange small
// guys at the bottom
bigWidth = WIDTH;
bigHeight = Math.floor(HEIGHT * this.opts.bigPercentage);
offsetTop = bigHeight;
bigOffsetTop = HEIGHT - offsetTop;
} else {
// We are wide, going to take up the whole height and arrange the small
// guys on the right
bigHeight = HEIGHT;
bigWidth = Math.floor(WIDTH * this.opts.bigPercentage);
offsetLeft = bigWidth;
bigOffsetLeft = WIDTH - offsetLeft;
}
if (this.opts.bigFirst) {
this.arrange(
bigOnesAux,
bigWidth,
bigHeight,
0,
0,
this.opts.bigFixedRatio,
this.opts.bigMinRatio,
this.opts.bigMaxRatio,
this.opts.animate
);
this.arrange(
smallOnesAux,
WIDTH - offsetLeft,
HEIGHT - offsetTop,
offsetLeft,
offsetTop,
this.opts.fixedRatio,
this.opts.minRatio,
this.opts.maxRatio,
this.opts.animate
);
} else {
this.arrange(
smallOnesAux,
WIDTH - offsetLeft,
HEIGHT - offsetTop,
0,
0,
this.opts.fixedRatio,
this.opts.minRatio,
this.opts.maxRatio,
this.opts.animate
);
this.arrange(
bigOnesAux,
bigWidth,
bigHeight,
bigOffsetLeft,
bigOffsetTop,
this.opts.bigFixedRatio,
this.opts.bigMinRatio,
this.opts.bigMaxRatio,
this.opts.animate
);
}
}
/**
* @hidden
*/
private existBigAndNormalOnes(bigOnes: HTMLVideoElement[], normalOnes: HTMLVideoElement[], smallOnes: HTMLVideoElement[]) {
return (
(bigOnes.length > 0 && normalOnes.length > 0 && smallOnes.length === 0) ||
(bigOnes.length > 0 && normalOnes.length === 0 && smallOnes.length > 0) ||
(bigOnes.length === 0 && normalOnes.length > 0 && smallOnes.length > 0)
);
}
/**
* @hidden
*/
private onlyExistBigOnes(bigOnes: HTMLVideoElement[], normalOnes: HTMLVideoElement[], smallOnes: HTMLVideoElement[]): boolean {
return bigOnes.length > 0 && normalOnes.length === 0 && smallOnes.length === 0;
}
/**
* @hidden
*/
private existBigAndNormalAndSmallOnes(
bigOnes: HTMLVideoElement[],
normalOnes: HTMLVideoElement[],
smallOnes: HTMLVideoElement[]
): boolean {
return bigOnes.length > 0 && normalOnes.length > 0 && smallOnes.length > 0;
}
/**
* @hidden
*/
private filterDisplayNone(element: HTMLElement) {
return element.style.display !== 'none';
}
}
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