element-web-Github/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: 17px;
$activeStripeSize: 4px;
$activeBorderTransparentGap: 2px;

$activeBackgroundColor: $roomtile-selected-bg-color;
$activeBorderColor: $secondary-fg-color;

.mx_SpacePanel {
    flex: 0 0 auto;
    background-color: $groupFilterPanel-bg-color;
    padding: 0;
    margin: 0;

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

    .mx_SpacePanel_spaceTreeWrapper {
        flex: 1;
    }

    .mx_SpacePanel_toggleCollapse {
        flex: 0 0 auto;
        width: 40px;
        height: 40px;
        mask-position: center;
        mask-size: 32px;
        mask-repeat: no-repeat;
        margin-left: $gutterSize;
        margin-bottom: 12px;
        background-color: $roomlist-header-color;
        mask-image: url('$(res)/img/element-icons/expand-space-panel.svg');

        &.expanded {
            transform: scaleX(-1);
        }
    }

    ul {
        margin: 0;
        list-style: none;
        padding: 0;
        padding-left: 16px;
    }

    .mx_AutoHideScrollbar {
        padding: 16px 12px 16px 0;
    }

    .mx_SpaceButton_toggleCollapse {
        cursor: pointer;
    }

    .mx_SpaceItem.collapsed {
        .mx_SpaceButton {
            .mx_NotificationBadge {
                right: -4px;
                top: -4px;
            }
        }

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

        & > .mx_SpaceTreeLevel {
            display: none;
        }
    }

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

    .mx_SpaceButton {
        border-radius: 8px;
        position: relative;
        margin-bottom: 2px;
        display: flex;
        align-items: center;
        padding: 4px;

        &.mx_SpaceButton_active {
            &:not(.mx_SpaceButton_narrow) .mx_SpaceButton_selectionWrapper {
                background-color: $activeBackgroundColor;
                border-radius: 8px;
            }

            &.mx_SpaceButton_narrow {
                .mx_BaseAvatar, .mx_SpaceButton_avatarPlaceholder {
                    border: 2px $activeBorderColor solid;
                    border-radius: 11px;
                }
            }
        }

        .mx_SpaceButton_selectionWrapper {
            display: flex;
            flex: 1;
            align-items: center;
        }

        .mx_SpaceButton_name {
            flex: 1;
            margin-left: 8px;
            white-space: nowrap;
            display: block;
            max-width: 150px;
            text-overflow: ellipsis;
            overflow: hidden;
            padding-right: 8px;
            font-size: $font-14px;
            line-height: $font-18px;
        }

        .mx_SpaceButton_toggleCollapse {
            width: calc($gutterSize - $activeStripeSize);
            margin-left: 1px;
            height: 20px;
            mask-position: center;
            mask-size: 20px;
            mask-repeat: no-repeat;
            background-color: $roomlist-header-color;
            mask-image: url('$(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_icon {
            background-color: #ffffff;

            &::before {
                background-color: #3f3d3d;
                mask-image: url('$(res)/img/element-icons/home.svg');
            }
        }

        .mx_SpaceButton_avatarPlaceholder {
            border: $activeBorderTransparentGap transparent solid;
            padding: $activeBorderTransparentGap;
        }

        .mx_BaseAvatar {
            /* moving the border-radius to this element from _image
            element so we can add a border to it without the initials being displaced */
            overflow: hidden;
            border: 2px transparent solid;
            padding: $activeBorderTransparentGap;

            .mx_BaseAvatar_initial {
                top: $activeBorderTransparentGap;
                left: $activeBorderTransparentGap;
            }

            .mx_BaseAvatar_image {
                border-radius: 8px;
            }
        }
    }

    .mx_SpacePanel_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: 0 2px; // centering
        }

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

    &.collapsed {
        .mx_SpaceButton {
            .mx_SpacePanel_badgeContainer {
                position: absolute;
                right: 0px;
                top: 2px;
            }
        }
    }

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

    /* root space buttons are bigger and not indented */
    & > .mx_AutoHideScrollbar {
        & > .mx_SpaceButton {
            height: $topLevelHeight;

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

        & > ul {
            padding-left: 0;
        }
    }
}