riot-web/res/css/structures/_SpacePanel.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.
*/

$topLevelHeight: 32px;
$nestedHeight: 24px;
$gutterSize: 16px;
$activeBorderTransparentGap: 1px;

$activeBackgroundColor: $panel-actions;
$activeBorderColor: $primary-content;

.mx_SpacePanel {
    background-color: $groupFilterPanel-bg-color;
    flex: 0 0 auto;
    padding: 0;
    margin: 0;
    position: relative;
    // Fix for the blurred avatar-background
    z-index: 1;

    // Create another flexbox so the Panel fills the container
    display: flex;
    flex-direction: column;

    .mx_SpacePanel_toggleCollapse {
        position: absolute;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background-color: $tertiary-content;
        top: 19px; // v-align with avatar
        right: -8px;

        &::before {
            content: "";
            position: absolute;
            width: inherit;
            height: inherit;
            mask-position: center;
            mask-size: contain;
            mask-repeat: no-repeat;
            background-color: $background;
            mask-image: url('$(res)/img/feather-customised/chevron-down.svg');
            transform: rotate(270deg);
        }

        &:not(.expanded) {
            opacity: 0;

            &::before {
                mask-position: center 1px;
            }
        }

        &.expanded::before {
            transform: rotate(90deg);
        }
    }

    &:hover .mx_SpacePanel_toggleCollapse {
        opacity: 1;
    }

    ul {
        margin: 0;
        list-style: none;
        padding: 0;

        > .mx_SpaceItem {
            padding-left: 16px;
        }
    }

    .mx_SpaceButton_toggleCollapse {
        cursor: pointer;
    }

    .mx_SpaceItem_dragging {
        .mx_SpaceButton_toggleCollapse {
            visibility: hidden;
        }
    }

    .mx_SpaceItem {
        display: inline-flex;
        flex-flow: wrap;

        &.mx_SpaceItem_narrow {
            align-self: baseline;
        }
    }

    .mx_SpaceItem.collapsed {
        & > .mx_SpaceButton > .mx_SpaceButton_toggleCollapse {
            transform: rotate(-90deg);
        }

        & > .mx_SpaceTreeLevel {
            display: none;
        }
    }

    .mx_SpaceItem_new {
        position: relative;

        .mx_BetaDot {
            position: absolute;
            left: 33px;
            top: -5px;
        }
    }

    .mx_SpaceItem:not(.hasSubSpaces) > .mx_SpaceButton {
        margin-left: $gutterSize;
        min-width: 40px;
    }

    .mx_SpaceButton {
        border-radius: 8px;
        display: flex;
        align-items: center;
        padding: 4px 4px 4px 0;
        width: 100%;
        cursor: pointer;

        &.mx_SpaceButton_active {
            &:not(.mx_SpaceButton_narrow) .mx_SpaceButton_selectionWrapper {
                background-color: $activeBackgroundColor;
            }

            &.mx_SpaceButton_narrow .mx_SpaceButton_selectionWrapper {
                padding: $activeBorderTransparentGap;
                border: 3px $activeBorderColor solid;
            }
        }

        .mx_SpaceButton_selectionWrapper {
            position: relative;
            display: flex;
            flex: 1;
            align-items: center;
            border-radius: 12px;
            padding: 4px;
            width: calc(100% - 32px);
        }

        .mx_SpaceButton_name {
            flex: 1;
            margin-left: 8px;
            white-space: nowrap;
            display: block;
            text-overflow: ellipsis;
            overflow: hidden;
            font-size: $font-14px;
            line-height: $font-18px;
        }

        .mx_SpaceButton_toggleCollapse {
            width: $gutterSize;
            min-width: $gutterSize;
            height: 20px;
            mask-position: center;
            mask-size: 20px;
            mask-repeat: no-repeat;
            background-color: $tertiary-content;
            mask-image: url('$(res)/img/feather-customised/chevron-down.svg');
        }

        .mx_SpaceButton_icon {
            width: $topLevelHeight;
            min-width: $topLevelHeight;
            height: $topLevelHeight;
            border-radius: 8px;
            position: relative;

            &::before {
                position: absolute;
                content: '';
                width: $topLevelHeight;
                height: $topLevelHeight;
                top: 0;
                left: 0;
                mask-position: center;
                mask-repeat: no-repeat;
                mask-size: 18px;
            }
        }

        &.mx_SpaceButton_home,
        &.mx_SpaceButton_favourites,
        &.mx_SpaceButton_people,
        &.mx_SpaceButton_orphans {
            .mx_SpaceButton_icon {
                background-color: $panel-actions;

                &::before {
                    background-color: $secondary-content;
                }
            }
        }

        &.mx_SpaceButton_home .mx_SpaceButton_icon::before {
            mask-image: url('$(res)/img/element-icons/home.svg');
        }

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

        &.mx_SpaceButton_people .mx_SpaceButton_icon::before {
            mask-image: url('$(res)/img/element-icons/room/members.svg');
        }

        &.mx_SpaceButton_orphans .mx_SpaceButton_icon::before {
            mask-image: url('$(res)/img/element-icons/roomlist/hash-circle.svg');
        }

        &.mx_SpaceButton_new .mx_SpaceButton_icon {
            &::before {
                background-color: $primary-content;
                mask-image: url('$(res)/img/element-icons/plus.svg');
                transition: all .2s ease-in-out; // TODO transition
            }
        }

        &.mx_SpaceButton_newCancel .mx_SpaceButton_icon::before {
            transform: rotate(45deg);
        }

        .mx_BaseAvatar_image {
            border-radius: 8px;
        }

        .mx_SpaceButton_menuButton {
            width: 20px;
            min-width: 20px; // yay flex
            height: 20px;
            margin-top: auto;
            margin-bottom: auto;
            display: none;
            position: relative;

            &::before {
                top: 3px;
                left: 2px;
                content: '';
                width: 16px;
                height: 16px;
                position: absolute;
                mask-position: center;
                mask-size: contain;
                mask-repeat: no-repeat;
                mask-image: url('$(res)/img/element-icons/context-menu.svg');
                background: $primary-content;
            }
        }
    }

    .mx_SpaceTreeLevel {
        display: flex;
        flex-direction: column;
        max-width: 250px;
        flex-grow: 1;

        .mx_BaseAvatar:not(.mx_UserMenu_userAvatar_BaseAvatar) .mx_BaseAvatar_initial {
            color: $secondary-content;
            border-radius: 8px;
            background-color: $panel-actions;
            font-size: $font-15px !important; // override inline style
            font-weight: $font-semi-bold;
            line-height: $font-18px;

            & + .mx_BaseAvatar_image {
                visibility: hidden;
            }
        }
    }

    .mx_SpaceButton_avatarWrapper {
        position: relative;
    }

    .mx_SpacePanel_badgeContainer {
        // Create a flexbox to make aligning dot badges easier
        display: flex;
        align-items: center;
        position: absolute;
        right: -3px;
        top: -3px;

        .mx_NotificationBadge {
            margin: 0 2px; // centering
            background-clip: padding-box;
        }

        .mx_NotificationBadge_dot {
            // make the smaller dot occupy the same width for centering
            margin: 0 -1px 0 0;
            border: 3px solid $groupFilterPanel-bg-color;
        }

        .mx_NotificationBadge_2char,
        .mx_NotificationBadge_3char {
            margin: -5px -5px 0 0;
            border: 2px solid $groupFilterPanel-bg-color;
        }
    }

    .mx_SpaceButton:hover,
    .mx_SpaceButton:focus-within,
    .mx_SpaceButton_hasMenuOpen {
        &:not(.mx_SpaceButton_narrow):not(.mx_SpaceButton_invite) .mx_SpaceButton_menuButton {
            display: block;
        }
    }

    /* root space buttons are bigger and not indented */
    & > .mx_AutoHideScrollbar {
        flex: 1;
        padding: 0 8px 16px 0;

        & > .mx_SpaceButton {
            height: $topLevelHeight;

            &.mx_SpaceButton_active::before {
                height: $topLevelHeight;
            }
        }

        & > ul {
            padding-left: 0;
        }

        &.mx_IndicatorScrollbar_topOverflow {
            mask-image: linear-gradient(180deg, transparent, black 5%);
        }

        &.mx_IndicatorScrollbar_bottomOverflow {
            mask-image: linear-gradient(180deg, black, black 95%, transparent);
        }

        &.mx_IndicatorScrollbar_topOverflow.mx_IndicatorScrollbar_bottomOverflow {
            mask-image: linear-gradient(180deg, transparent, black 5%, black 95%, transparent);
        }
    }

    .mx_UserMenu {
        padding: 0 2px 8px;
        border-bottom: 1px solid $quinary-content;
        margin: 12px 14px 4px 18px;
    }
}

.mx_SpacePanel_contextMenu {
    .mx_SpacePanel_contextMenu_header {
        margin: 12px 16px 12px;
        font-weight: $font-semi-bold;
        font-size: $font-15px;
        line-height: $font-18px;
    }

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

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

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

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

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

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

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

    .mx_SpacePanel_noIcon {
        display: none;

        & + .mx_IconizedContextMenu_label {
            padding-left: 5px !important; // override default iconized label style to align with header
        }
    }

    .mx_SpacePanel_contextMenu_separatorLabel {
        color: $tertiary-content;
        font-size: $font-10px;
        line-height: $font-12px;
        font-weight: $font-semi-bold;
        //margin-left: 8px;
    }
}

.mx_SpacePanel_sharePublicSpace {
    margin: 0;
}