riot-web/res/css/views/rooms/_RoomTile.scss

/*
Copyright 2020 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.
*/

// Note: the room tile expects to be in a flexbox column container
.mx_RoomTile {
    margin-bottom: 4px;
    padding: 4px;

    // The tile is also a flexbox row itself
    display: flex;

    &.mx_RoomTile_selected,
    &:hover,
    &:focus-within,
    &.mx_RoomTile_hasMenuOpen {
        background-color: $roomtile-selected-bg-color;
        border-radius: 8px;
    }

    .mx_DecoratedRoomAvatar, .mx_RoomTile_avatarContainer {
        margin-right: 8px;
    }

    .mx_RoomTile_nameContainer {
        flex-grow: 1;
        min-width: 0; // allow flex to shrink it
        margin-right: 8px; // spacing to buttons/badges

        // Create a new column layout flexbox for the name parts
        display: flex;
        flex-direction: column;
        justify-content: center;

        .mx_RoomTile_name,
        .mx_RoomTile_messagePreview {
            margin: 0 2px;
            width: 100%;

            // Ellipsize any text overflow
            text-overflow: ellipsis;
            overflow: hidden;
            white-space: nowrap;
        }

        .mx_RoomTile_name {
            font-size: $font-14px;
            line-height: $font-18px;
        }

        .mx_RoomTile_name.mx_RoomTile_nameHasUnreadEvents {
            font-weight: 600;
        }

        .mx_RoomTile_messagePreview {
            font-size: $font-13px;
            line-height: $font-18px;
            color: $roomtile-preview-color;
        }

        .mx_RoomTile_nameWithPreview {
            margin-top: -4px; // shift the name up a bit more
        }
    }

    .mx_RoomTile_notificationsButton {
        margin-left: 4px; // spacing between buttons
    }

    .mx_RoomTile_badgeContainer {
        height: 16px;
        // don't set width so that it takes no space when there is no badge to show
        margin: auto 0; // vertically align

        // Create a flexbox to make aligning dot badges easier
        display: flex;
        align-items: center;

        .mx_NotificationBadge {
            margin-right: 2px; // centering
        }

        .mx_NotificationBadge_dot {
            // make the smaller dot occupy the same width for centering
            margin-left: 5px;
            margin-right: 7px;
        }
    }

    // The context menu buttons are hidden by default
    .mx_RoomTile_menuButton,
    .mx_RoomTile_notificationsButton {
        width: 20px;
        min-width: 20px; // yay flex
        height: 20px;
        margin-top: auto;
        margin-bottom: auto;
        position: relative;
        display: none;

        &::before {
            top: 2px;
            left: 2px;
            content: '';
            width: 16px;
            height: 16px;
            position: absolute;
            mask-position: center;
            mask-size: contain;
            mask-repeat: no-repeat;
            background: $primary-fg-color;
        }
    }

    // If the room has an overriden notification setting then we always show the notifications menu button
    .mx_RoomTile_notificationsButton.mx_RoomTile_notificationsButton_show {
        display: block;
    }

    .mx_RoomTile_menuButton::before {
        mask-image: url('$(res)/img/element-icons/context-menu.svg');
    }

    &:not(.mx_RoomTile_minimized) {
        &:hover,
        &:focus-within,
        &.mx_RoomTile_hasMenuOpen {
            // Hide the badge container on hover because it'll be a menu button
            .mx_RoomTile_badgeContainer {
                width: 0;
                height: 0;
                display: none;
            }

            .mx_RoomTile_notificationsButton,
            .mx_RoomTile_menuButton {
                display: block;
            }
        }
    }

    &.mx_RoomTile_minimized {
        flex-direction: column;
        align-items: center;
        position: relative;

        .mx_DecoratedRoomAvatar, .mx_RoomTile_avatarContainer {
            margin-right: 0;
        }
    }
}

// We use these both in context menus and the room tiles
.mx_RoomTile_iconBell::before {
    mask-image: url('$(res)/img/element-icons/notifications.svg');
}
.mx_RoomTile_iconBellDot::before {
    mask-image: url('$(res)/img/element-icons/roomlist/notifications-default.svg');
}
.mx_RoomTile_iconBellCrossed::before {
    mask-image: url('$(res)/img/element-icons/roomlist/notifications-off.svg');
}
.mx_RoomTile_iconBellMentions::before {
    mask-image: url('$(res)/img/element-icons/roomlist/notifications-dm.svg');
}

.mx_RoomTile_contextMenu {
    .mx_RoomTile_iconStar::before {
        mask-image: url('$(res)/img/element-icons/roomlist/favorite.svg');
    }

    .mx_RoomTile_iconArrowDown::before {
        mask-image: url('$(res)/img/element-icons/roomlist/low-priority.svg');
    }

    .mx_RoomTile_iconSettings::before {
        mask-image: url('$(res)/img/element-icons/settings.svg');
    }

    .mx_RoomTile_iconSignOut::before {
        mask-image: url('$(res)/img/element-icons/leave.svg');
    }
}