element-web-Github/res/css/views/audio_messages/_PlaybackContainer.pcss

/*
Copyright 2024 New Vector Ltd.
Copyright 2021, 2022 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

/* Dev note: there's no actual component called <PlaybackContainer />. These classes */
/* are shared amongst multiple voice message components. */

/* Container for live recording and playback controls */
.mx_MediaBody.mx_VoiceMessagePrimaryContainer {
    /* The waveform (right) has a 1px padding on it that we want to account for, otherwise */
    /* inherit from mx_MediaBody */
    padding-right: 11px;

    /* Cheat at alignment a bit */
    display: flex;
    align-items: center;

    contain: content;

    .mx_Waveform,
    .mx_RecordingPlayback_timelineLayoutMiddle {
        min-width: 0; /* Prevent a blowout */
    }

    /* Waveforms are present in live recording only */
    .mx_Waveform {
        /* default, overridden in JS */
        --barHeight: 1;
        .mx_Waveform_bar {
            background-color: $quaternary-content;
            height: 100%;
            transform: scaleY(max(0.05, var(--barHeight)));

            &.mx_Waveform_bar_100pct {
                /* Small animation to remove the mechanical feel of progress */
                transition: background-color 250ms ease;
                background-color: $secondary-content;
            }
        }
    }

    .mx_Clock {
        width: $font-42px; /* we're not using a monospace font, so fake it */
        min-width: $font-42px; /* force sensible layouts in awkward flexboxes (file panel, for example) */
        padding-right: 6px; /* with the fixed width this ends up as a visual 8px most of the time, as intended. */
        padding-left: 8px; /* isolate from recording circle / play control */
    }

    .mx_RecordingPlayback_timelineLayoutMiddle {
        margin-left: 8px;
        margin-right: 6px;
        position: relative;
        display: inline-block;
        flex: 1;
        height: 30px; /* same height as mx_Waveform, needed for automatic vertical centering */

        .mx_Waveform {
            left: 0;
            top: 0;
        }

        .mx_SeekBar {
            position: absolute;
            left: 0;
            height: 30px;
            top: -2px; /* visually vertically centered */

            /* Hide the hairline progress bar since we're at 100% height. Need to have distinct rules */
            /* because CSS is weird. */
            background: none;
            &::before {
                background: none;
            }
            &::-moz-range-progress {
                background: none;
            }

            /* Make the thumb easier to see. Like the SeekBar original styles, these need to be */
            /* distinct. We make it transparent so it doesn't show up on the UI, but also larger */
            /* so it's easier to grab by mouse users in some browsers. Most browsers let the user */
            /* move and drag the thumb regardless of hitting the thumb, however. */
            &::-webkit-slider-thumb {
                width: 10px;
                height: 10px;
                background-color: transparent;
            }
            &::-moz-range-thumb {
                width: 10px;
                height: 10px;
                background-color: transparent;
            }
        }

        /* For timeline-rendered playback, the clock is on the other side of the waveform. */
        & + .mx_Clock {
            text-align: right;

            /* Take the padding off the clock because it's accounted for by the `timelineLayoutMiddle` */
            padding: 0;
        }
    }
}