element-web/res/css/views/rooms/_EventBubbleTile.scss

/*
Copyright 2021 The Matrix.org Foundation C.I.C.

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.
*/

.mx_EventTile[data-layout=bubble],
.mx_EventListSummary[data-layout=bubble] {
    --avatarSize: 32px;
    --gutterSize: 11px;
    --cornerRadius: 12px;
    --maxWidth: 70%;
    margin-right: 100px;
}

.mx_EventTile[data-layout=bubble] {
    position: relative;
    margin-top: var(--gutterSize);
    margin-left: 49px;
    font-size: $font-14px;

    .mx_ThreadInfo {
        clear: both;
        width: fit-content;
    }

    &.mx_EventTile_continuation {
        margin-top: 2px;
    }

    &.mx_EventTile_highlight {
        &::before {
            background-color: $event-highlight-bg-color;
        }

        color: $alert;
    }

    /* For replies */
    .mx_EventTile {
        padding-top: 0;
    }

    &::before {
        content: '';
        position: absolute;
        top: -1px;
        bottom: -1px;
        left: -60px;
        right: -60px;
        z-index: -1;
        border-radius: 4px;
    }

    &:hover,
    &.mx_EventTile_selected {

        &::before {
            background: $eventbubble-bg-hover;
        }

        .mx_EventTile_avatar {
            img {
                box-shadow: 0 0 0 3px $eventbubble-bg-hover;
            }
        }
    }

    .mx_SenderProfile,
    .mx_EventTile_line {
        width: fit-content;
        max-width: 70%;
    }

    > .mx_SenderProfile {
        position: relative;
        top: -2px;
        left: 2px;
        font-size: $font-15px;
    }

    &[data-self=false] {
        .mx_EventTile_line {
            border-bottom-right-radius: var(--cornerRadius);

            .mx_MImageBody .mx_MImageBody_thumbnail {
                border-bottom-right-radius: var(--cornerRadius);
            }
        }
        .mx_EventTile_avatar {
            left: -34px;
        }

        .mx_MessageActionBar {
            right: 0;
            transform: translate3d(90%, 50%, 0);
        }

        --backgroundColor: $eventbubble-others-bg;
    }
    &[data-self=true] {
        .mx_EventTile_line {
            float: right;
            border-bottom-left-radius: var(--cornerRadius);
            > a {
                left: auto;
                right: -68px;
            }

            .mx_MImageBody .mx_MImageBody_thumbnail {
                border-bottom-left-radius: var(--cornerRadius);
            }
        }

        .mx_ThreadInfo {
            float: right;
            margin-right: calc(-1 * var(--gutterSize));
        }

        .mx_SenderProfile {
            display: none;
        }

        .mx_ReplyTile .mx_SenderProfile {
            display: block;
        }

        .mx_ReactionsRow {
            float: right;
            clear: right;
            display: flex;

            /* Moving the "add reaction button" before the reactions */
            > :last-child {
                order: -1;
            }
        }
        .mx_EventTile_avatar {
            top: -19px; // height of the sender block
            right: -35px;
        }

        --backgroundColor: $eventbubble-self-bg;
    }

    .mx_EventTile_line {
        position: relative;
        display: flex;
        gap: 5px;
        margin: 0 -12px 0 -9px;
        border-top-left-radius: var(--cornerRadius);
        border-top-right-radius: var(--cornerRadius);
        > a {
            position: absolute;
            padding: 10px 20px;
            top: 0;
            left: -68px;
        }

        //noinspection CssReplaceWithShorthandSafely
        .mx_MImageBody .mx_MImageBody_thumbnail {
            // Note: This is intentionally not compressed because the browser gets confused
            // when it is all combined. We're effectively unsetting the border radius then
            // setting the two corners we care about manually.
            border-radius: unset;
            border-top-left-radius: var(--cornerRadius);
            border-top-right-radius: var(--cornerRadius);
        }

        .mx_EventTile_e2eIcon {
            flex-shrink: 0; // keep it at full size
        }
    }

    .mx_EventTile_line:not(.mx_EventTile_mediaLine) {
        padding: var(--gutterSize);
        background: var(--backgroundColor);
    }

    &.mx_EventTile_continuation[data-self=false] .mx_EventTile_line {
        border-top-left-radius: 0;

        .mx_MImageBody .mx_MImageBody_thumbnail {
            border-top-left-radius: 0;
        }
    }
    &.mx_EventTile_lastInSection[data-self=false] .mx_EventTile_line {
        border-bottom-left-radius: var(--cornerRadius);

        .mx_MImageBody .mx_MImageBody_thumbnail {
            border-bottom-left-radius: var(--cornerRadius);
        }
    }

    &.mx_EventTile_continuation[data-self=true] .mx_EventTile_line {
        border-top-right-radius: 0;

        .mx_MImageBody .mx_MImageBody_thumbnail {
            border-top-right-radius: 0;
        }
    }
    &.mx_EventTile_lastInSection[data-self=true] .mx_EventTile_line {
        border-bottom-right-radius: var(--cornerRadius);

        .mx_MImageBody .mx_MImageBody_thumbnail {
            border-bottom-right-radius: var(--cornerRadius);
        }
    }

    .mx_EventTile_avatar {
        position: absolute;
        top: 0;
        line-height: 1;
        z-index: 9;
        img {
            box-shadow: 0 0 0 3px $background;
            border-radius: 50%;
        }
    }

    &.mx_EventTile_noSender {
        .mx_EventTile_avatar {
            top: -19px;
        }
    }

    .mx_BaseAvatar,
    .mx_EventTile_avatar {
        line-height: 1;
    }

    &[data-has-reply=true] {
        > .mx_EventTile_line {
            flex-direction: column;
        }

        .mx_ReplyChain_show {
            order: 99999;
        }

        .mx_ReplyChain {
            .mx_EventTile_reply {
                max-width: 90%;
                padding: 0;
                > a {
                    display: none !important;
                }
            }

            .mx_EventTile {
                display: flex;
                gap: var(--gutterSize);
                .mx_EventTile_avatar {
                    position: static;
                }
                .mx_SenderProfile {
                    display: none;
                }
            }
        }
    }

    .mx_EditMessageComposer_buttons {
        position: static;
        padding: 0;
        margin: 8px 0 0;
        background: transparent;
    }

    .mx_ReactionsRow {
        margin-right: -18px;
        margin-left: -9px;
    }

    /* Special layout scenario for "Unable To Decrypt (UTD)" events */
    &.mx_EventTile_bad > .mx_EventTile_line {
        display: grid;
        grid-template:
            "reply reply" auto
            "shield body" auto
            "shield link" auto
            / auto  1fr;
        .mx_EventTile_e2eIcon {
            grid-area: shield;
        }
        .mx_UnknownBody {
            grid-area: body;
        }
        .mx_EventTile_keyRequestInfo {
            grid-area: link;
        }
        .mx_ReplyChain_wrapper {
            grid-area: reply;
        }
    }

    .mx_EventTile_readAvatars {
        position: absolute;
        right: -110px;
        bottom: 0;
        top: auto;
    }

    .mx_MTextBody {
        max-width: 100%;
    }
}

.mx_EventTile.mx_EventTile_noBubble[data-layout=bubble] {
    --backgroundColor: transparent;
}

.mx_EventTile.mx_EventTile_bubbleContainer[data-layout=bubble],
.mx_EventTile.mx_EventTile_leftAlignedBubble[data-layout=bubble],
.mx_EventTile.mx_EventTile_info[data-layout=bubble],
.mx_EventListSummary[data-layout=bubble][data-expanded=false] {
    --backgroundColor: transparent;
    --gutterSize: 0;

    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 5px 0;

    .mx_EventTile_avatar {
        position: static;
        order: -1;
        margin-right: 5px;
    }

    .mx_EventTile_line,
    .mx_EventTile_info {
        min-width: 100%;
        // Preserve alignment with left edge of text in bubbles
        margin: 0;
    }

    .mx_EventTile_e2eIcon {
        margin-left: 9px;
    }

    .mx_EventTile_line > a {
        // Align timestamps with those of normal bubble tiles
        right: auto;
        top: -11px;
        left: -95px;
    }
}

.mx_EventListSummary[data-layout=bubble] {
    --maxWidth: 70%;
    margin-left: calc(var(--avatarSize) + var(--gutterSize));

    .mx_EventListSummary_toggle {
        margin: 0 55px 0 5px;
        float: none;

        &[aria-expanded=false] {
            order: 9;
        }
        &[aria-expanded=true] {
            text-align: right;
            margin-right: 100px;
        }
    }

    .mx_EventListSummary_line {
        display: none;
    }

    .mx_EventListSummary_avatars {
        padding-top: 0;
    }

    &::after {
        content: "";
        clear: both;
    }
}

.mx_EventListSummary[data-expanded=false][data-layout=bubble] {
    // Align with left edge of bubble tiles
    padding: 0 49px;
}

.mx_EventListSummary[data-expanded=true][data-layout=bubble] {
    display: contents;

    .mx_EventTile {
        padding: 2px 0;
    }
}

// increase margin between ELS and the next Event to not have our user avatar overlap the expand/collapse button
.mx_EventListSummary[data-layout=bubble][data-expanded=false] + .mx_EventTile[data-layout=bubble][data-self=true] {
    margin-top: 20px;
}

/* events that do not require bubble layout */
.mx_EventListSummary[data-layout=bubble],
.mx_EventTile.mx_EventTile_bad[data-layout=bubble] {
    .mx_EventTile_line {
        background: transparent;
    }

    &:hover {
        &::before {
            background: transparent;
        }
    }
}