element-call/src/video-grid/VideoTile.module.css

/*
Copyright 2022-2023 New Vector Ltd

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

.videoTile {
  position: absolute;
  top: 0;
  container-name: videoTile;
  container-type: size;
  border-radius: var(--cpd-space-4x);
  transition: outline-color ease 0.15s;
  outline: var(--cpd-border-width-2) solid rgb(0 0 0 / 0);
}

/* Use a pseudo-element to create the expressive speaking border, since CSS
borders don't support gradients */
.videoTile::before {
  content: "";
  position: absolute;
  z-index: -1; /* Put it below the outline */
  opacity: 0; /* Hidden unless speaking */
  transition: opacity ease 0.15s;
  inset: calc(-1 * var(--cpd-border-width-4));
  border-radius: var(--cpd-space-5x);
  background: linear-gradient(
      119deg,
      rgba(13, 92, 189, 0.7) 0%,
      rgba(13, 189, 168, 0.7) 100%
    ),
    linear-gradient(
      180deg,
      rgba(13, 92, 189, 0.9) 0%,
      rgba(13, 189, 168, 0.9) 100%
    );
  background-blend-mode: overlay, normal;
}

.videoTile.speaking {
  /* !important because speaking border should take priority over hover */
  outline: var(--cpd-border-width-1) solid var(--cpd-color-bg-canvas-default) !important;
}

.videoTile.speaking::before {
  opacity: 1;
}

@media (hover: hover) {
  .videoTile:hover {
    outline: var(--cpd-border-width-2) solid
      var(--cpd-color-border-interactive-hovered);
  }
}

.videoTile.maximised {
  position: relative;
  border-radius: 0;
  inline-size: 100%;
  block-size: 100%;
}

.videoTile video {
  inline-size: 100%;
  block-size: 100%;
  object-fit: contain;
  background-color: var(--cpd-color-bg-subtle-primary);
  /* This transform is a no-op, but it forces Firefox to use a different
  rendering path, one that actually clips the corners of <video> elements into
  the intended rounded shape. We can remove this if Firefox stops being broken. */
  transform: translate(0);
}

.videoTile.mirror video {
  transform: scaleX(-1);
}

.videoTile.screenshare video {
  object-fit: contain;
}

.videoTile.cropVideo video {
  object-fit: cover;
}

.videoTile.videoMuted video {
  display: none;
}

.bg {
  background-color: var(--cpd-color-bg-subtle-secondary);
  inline-size: 100%;
  block-size: 100%;
  border-radius: inherit;
  contain: strict;
}

.avatar {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.videoTile.videoMuted .avatar {
  display: initial;
}

/* CSS makes us put a condition here, even though all we want to do is
unconditionally select the container so we can use cqmin units */
@container videoTile (width > 0) {
  .avatar {
    /* Half of the smallest dimension of the tile */
    inline-size: 50cqmin;
    block-size: 50cqmin;
  }
}

.avatar > img {
  /* To make avatars scale smoothly with their tiles during animations, we
  override the styles set on the element */
  inline-size: 100% !important;
  block-size: 100% !important;
}

.fg {
  position: absolute;
  inset: var(--cpd-space-1x);
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: 1fr auto;
  grid-template-areas: ". button2" "nameTag button1";
  gap: var(--cpd-space-1x);
  place-items: start;
}

.nameTag {
  grid-area: nameTag;
  padding: var(--cpd-space-1x);
  padding-block: var(--cpd-space-1x);
  color: var(--cpd-color-text-primary);
  background-color: var(--cpd-color-bg-canvas-default);
  display: flex;
  align-items: center;
  border-radius: var(--cpd-radius-pill-effect);
  user-select: none;
  overflow: hidden;
  box-shadow: var(--small-drop-shadow);
  box-sizing: border-box;
  max-inline-size: 100%;
}

.nameTag > svg,
.nameTag > span {
  flex-shrink: 0;
}

.muteIcon[data-muted="true"] {
  color: var(--cpd-color-icon-secondary);
}

.muteIcon[data-muted="false"] {
  color: var(--cpd-color-icon-primary);
}

.nameTag > .name {
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  padding-inline: var(--cpd-space-2x);
  flex-shrink: 1;
}

.errorIcon {
  display: block;
  color: var(--cpd-color-icon-critical-primary);
}

.fg > button {
  appearance: none;
  border: none;
  border-radius: var(--cpd-radius-pill-effect);
  padding: var(--cpd-space-1x);
  background: var(--cpd-color-bg-action-primary-rest);
  box-shadow: var(--small-drop-shadow);
  cursor: pointer;
  opacity: 0;
  transition: opacity ease 0.15s;
}

.fg > button:focus-visible,
.fg > :focus-visible ~ button,
.fg > button[data-enabled="true"],
.fg > button[data-state="open"] {
  opacity: 1;
}

@media (hover) {
  .fg:hover > button {
    opacity: 1;
  }

  .fg > button:hover {
    background: var(--cpd-color-bg-action-primary-hovered);
  }
}

.fg > button:active {
  background: var(--cpd-color-bg-action-primary-pressed) !important;
}

.fg > button[data-state="open"] {
  background: var(--cpd-color-bg-action-primary-pressed);
}

.fg > button > svg {
  display: block;
  color: var(--cpd-color-icon-on-solid-primary);
}

.fg > button:first-of-type {
  grid-area: button1;
}

.fg > button:nth-of-type(2) {
  grid-area: button2;
}

.volumeSlider {
  width: 100%;
}