mirotalk/public/js/videoGrid.js

'use strict';

let customRatio = true;
let isHideALLVideosActive = false;

// aspect       0      1      2      3       4
let ratios = ['0:0', '4:3', '16:9', '1:1', '1:2'];
let aspect = 2;

let ratio = getAspectRatio();

/**
 * Get aspect ratio
 * @returns {integer} aspect ratio
 */
function getAspectRatio() {
    customRatio = aspect == 0 ? true : false;
    const ratio = ratios[aspect].split(':');
    return ratio[1] / ratio[0];
}

/**
 * Set aspect ratio
 * @param {integer} index ratios index
 */
function setAspectRatio(index) {
    aspect = index;
    ratio = getAspectRatio();
    resizeVideoMedia();
}

/**
 * Calculate area
 * @param {integer} Increment
 * @param {integer} Count
 * @param {integer} Width
 * @param {integer} Height
 * @param {integer} Margin
 * @returns
 */
function Area(Increment, Count, Width, Height, Margin = 10) {
    ratio = customRatio ? 0.75 : ratio;
    let i = 0;
    let w = 0;
    let h = Increment * ratio + Margin * 2;
    while (i < Count) {
        if (w + Increment > Width) {
            w = 0;
            h = h + Increment * ratio + Margin * 2;
        }
        w = w + Increment + Margin * 2;
        i++;
    }
    if (h > Height) return false;
    else return Increment;
}

/**
 * Resize video elements
 */
function resizeVideoMedia() {
    if (isHideALLVideosActive) return;

    const videoMediaContainer = getId('videoMediaContainer');
    const Cameras = getEcN('Camera');

    const Margin = 5;
    let Width = videoMediaContainer.offsetWidth - Margin * 2;
    let Height = videoMediaContainer.offsetHeight - Margin * 2;
    let max = 0;
    let optional = isHideMeActive && videoMediaContainer.childElementCount <= 2 ? 1 : 0;
    let isOneVideoElement = videoMediaContainer.childElementCount - optional == 1 ? true : false;

    // console.log('videoMediaContainer.childElementCount:', {
    //     isOneVideoElement: isOneVideoElement,
    //     children: videoMediaContainer.childElementCount,
    //     optional: optional,
    // });

    resetZoom(); //...

    let bigWidth = Width * 4;
    if (isOneVideoElement) {
        Width = Width - bigWidth;
    }

    // loop (i recommend you optimize this)
    let i = 1;
    while (i < 5000) {
        let w = Area(i, Cameras.length, Width, Height, Margin);
        if (w === false) {
            max = i - 1;
            break;
        }
        i++;
    }

    max = max - Margin * 2;
    setWidth(Cameras, max, bigWidth, Margin, Height, isOneVideoElement);
    setSP('--vmi-wh', max / 3 + 'px');
}

/**
 * Reset zoom to avoid incorrect UI on screen resize
 */
function resetZoom() {
    const videoElements = getSlALL('video');
    videoElements.forEach((video) => {
        video.style.transform = '';
        video.style.transformOrigin = 'center';
    });
}

/**
 * Set Width
 * @param {object} Cameras
 * @param {integer} width
 * @param {integer} bigWidth
 * @param {integer} margin
 * @param {integer} maxHeight
 * @param {boolean} isOneVideoElement
 */
function setWidth(Cameras, width, bigWidth, margin, maxHeight, isOneVideoElement) {
    ratio = customRatio ? 0.68 : ratio;
    for (let s = 0; s < Cameras.length; s++) {
        Cameras[s].style.width = width + 'px';
        Cameras[s].style.margin = margin + 'px';
        Cameras[s].style.height = width * ratio + 'px';
        if (isOneVideoElement) {
            Cameras[s].style.width = bigWidth + 'px';
            Cameras[s].style.height = bigWidth * ratio + 'px';
            let camHeigh = Cameras[s].style.height.substring(0, Cameras[s].style.height.length - 2);
            if (camHeigh >= maxHeight) Cameras[s].style.height = maxHeight - 2 + 'px';
        }
    }
}

/**
 * Handle main buttons size (responsive)
 */
function resizeMainButtons() {
    if (!mainButtonsBar) return;
    // Devices break point
    const MOBILE_BREAKPOINT = 500;
    const TABLET_BREAKPOINT = 580;
    const DESKTOP_BREAKPOINT = 730;
    // Devices width x height
    const windowWidth = window.innerWidth;
    const windowHeight = window.innerHeight;
    //console.log('Window size', { width: windowWidth, height: windowWidth});

    // Determine whether buttons bar is vertical or horizontal
    const isButtonsBarVertical = btnsBarSelect.selectedIndex === 0;

    if (isButtonsBarVertical) {
        // Main buttons vertical align
        if (windowHeight <= MOBILE_BREAKPOINT) {
            setStyles(mainButtonsBar, '0.8rem', '2px', mainButtonsIcon, '0.8rem', '25px');
        } else if (windowHeight <= TABLET_BREAKPOINT) {
            setStyles(mainButtonsBar, '1rem', '3px', mainButtonsIcon, '1rem', '30px');
        } else if (windowHeight <= DESKTOP_BREAKPOINT) {
            setStyles(mainButtonsBar, '1.2rem', '4px', mainButtonsIcon, '1rem', '35px');
        } else {
            // > DESKTOP_BREAKPOINT
            setStyles(mainButtonsBar, '1.5rem', '4px', mainButtonsIcon, '1.2rem', '40px');
        }
    } else {
        // Main buttons horizontal align
        if (windowWidth <= MOBILE_BREAKPOINT) {
            setStyles(mainButtonsBar, '0.8rem', '2px', mainButtonsIcon, '0.8rem');
        } else if (windowWidth <= TABLET_BREAKPOINT) {
            setStyles(mainButtonsBar, '1rem', '3px', mainButtonsIcon, '1rem');
        } else if (windowWidth <= DESKTOP_BREAKPOINT) {
            setStyles(mainButtonsBar, '1.2rem', '4px', mainButtonsIcon, '1rem');
        } else {
            // > DESKTOP_BREAKPOINT
            setStyles(mainButtonsBar, '1.5rem', '4px', mainButtonsIcon, '1.2rem');
        }
    }
    /**
     * Set styles based on orientation
     * @param {object} elements
     * @param {string} fontSize
     * @param {string} padding
     * @param {object} icons
     * @param {string} fontSizeIcon
     * @param {string} bWidth
     */
    function setStyles(elements, fontSize, padding, icons, fontSizeIcon, bWidth = null) {
        if (bWidth) document.documentElement.style.setProperty('--btns-width', bWidth);

        elements.forEach(function (element) {
            element.style.fontSize = fontSize;
            element.style.padding = padding;
        });
        icons.forEach(function (icon) {
            icon.style.fontSize = fontSizeIcon;
        });
    }
}

/**
 * Handle window event listener
 */
window.addEventListener(
    'load',
    function (event) {
        resizeVideoMedia();
        resizeMainButtons();
        window.onresize = function () {
            resizeVideoMedia();
            resizeMainButtons();
        };
    },
    false
);