element-web-Github/res/css/views/rooms/_BasicMessageComposer.pcss

/*
Copyright 2019-2024 New Vector Ltd.
Copyright 2019 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.
*/

.mx_BasicMessageComposer {
    position: relative;

    .mx_BasicMessageComposer_inputEmpty > :first-child::before {
        content: var(--placeholder);
        color: var(--cpd-color-text-secondary);
        width: 0;
        height: 0;
        overflow: visible;
        display: inline-block;
        pointer-events: none;
        white-space: nowrap;
    }

    @keyframes visualbell {
        from {
            background-color: $visual-bell-bg-color;
        }
        to {
            background-color: $background;
        }
    }

    &.mx_BasicMessageComposer_input_error {
        animation: 0.2s visualbell;
    }

    .mx_BasicMessageComposer_input {
        white-space: pre-wrap;
        word-wrap: break-word;
        outline: none;
        overflow-x: hidden;

        /* Force caret nodes to be selected in full so that they can be */
        /* navigated through in a single keypress */
        .caretNode {
            user-select: all;
        }

        &.mx_BasicMessageComposer_input_shouldShowPillAvatar {
            span.mx_UserPill,
            span.mx_RoomPill,
            span.mx_SpacePill {
                user-select: all;
                position: relative;
                cursor: unset; /* We don't want indicate clickability */
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;

                &:hover {
                    /* We don't want indicate clickability | To override the overriding of .markdown-body */
                    background-color: $pill-bg-color !important;
                }

                /* avatar psuedo element */
                &::before {
                    display: inline-block;
                    content: var(--avatar-letter);
                    width: $font-16px;
                    min-width: $font-16px; /* ensure the avatar is not compressed */
                    height: $font-16px;
                    margin-inline-end: 0.24rem;
                    background: var(--avatar-background), $background;
                    color: var(--avatar-color, $avatar-initial-color);
                    background-repeat: no-repeat;
                    background-size: $font-16px;
                    border-radius: $font-16px;
                    text-align: center;
                    font-weight: normal;
                    line-height: $font-16px;
                    font-size: $font-10-4px;
                }
            }
        }

        &.mx_BasicMessageComposer_input_disabled {
            /* Ignore all user input to avoid accidentally triggering the composer */
            pointer-events: none;
        }
    }

    .mx_BasicMessageComposer_AutoCompleteWrapper {
        position: relative;
        height: 0;
    }
}