riot-web/res/css/views/rooms/_RoomSublist2.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.
*/

// TODO: Rename to mx_RoomSublist during replacement of old component

.mx_RoomSublist2 {
    // The sublist is a column of rows, essentially
    display: flex;
    flex-direction: column;

    padding-left: 8px;
    margin-top: 12px;
    margin-bottom: 12px;
    width: 100%;

    .mx_RoomSublist2_headerContainer {
        // Create a flexbox to make ordering easy
        display: flex;
        align-items: center;

        .mx_RoomSublist2_badgeContainer {
            opacity: 0.8;
            padding-right: 7px;

            // Create another flexbox row because it's super easy to position the badge at
            // the end this way.
            display: flex;
            align-items: center;
            justify-content: flex-end;
        }

        // Both of these buttons are hidden by default until the list is hovered
        .mx_RoomSublist2_auxButton,
        .mx_RoomSublist2_menuButton {
            width: 0;
            margin: 0;
            visibility: hidden;
            position: relative;

            &::before {
                content: '';
                width: 16px;
                height: 16px;
                position: absolute;
                top: 4px;
                left: 4px;
                mask-position: center;
                mask-size: contain;
                mask-repeat: no-repeat;
                background: $muted-fg-color;
            }
        }

        .mx_RoomSublist2_auxButton::before {
            mask-image: url('$(res)/img/feather-customised/plus.svg');
        }

        .mx_RoomSublist2_menuButton::before {
            mask-image: url('$(res)/img/feather-customised/more-horizontal.svg');
        }

        .mx_RoomSublist2_headerText {
            text-transform: uppercase;
            opacity: 0.5;
            line-height: $font-16px;
            font-size: $font-12px;
            padding-bottom: 8px;

            width: 100%;
            flex: 1;

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

    .mx_RoomSublist2_resizeBox {
        margin-bottom: 4px; // for the resize handle
        position: relative;

        // Create another flexbox column for the tiles
        display: flex;
        flex-direction: column;
        overflow: hidden;

        .mx_RoomSublist2_showMoreButton {
            cursor: pointer;
            font-size: $font-13px;
            line-height: $font-18px;
            color: $roomtile2-preview-color;

            // This is the same color as the left panel background because it needs
            // to occlude the lastmost tile in the list.
            background-color: $header-panel-bg-color;

            // Update the render() function for RoomSublist2 if these change
            // Update the ListLayout class for minVisibleTiles if these change.
            //
            // At 24px high and 8px padding on the top this equates to 0.65 of
            // a tile due to how the padding calculations work.
            height: 24px;
            padding-top: 8px;

            // We force this to the bottom so it will overlap rooms as needed.
            // We account for the space it takes up (24px) in the code through padding.
            position: absolute;
            bottom: 4px; // the height of the resize handle
            left: 0;
            right: 0;

            // We create a flexbox to cheat at alignment
            display: flex;
            align-items: center;

            .mx_RoomSublist2_showMoreButtonChevron {
                position: relative;
                width: 16px;
                height: 16px;
                margin-left: 12px;
                margin-right: 18px;
                mask-image: url('$(res)/img/feather-customised/chevron-down.svg');
                mask-position: center;
                mask-size: contain;
                mask-repeat: no-repeat;
                background: $roomtile2-preview-color;
            }
        }

        // Class name comes from the ResizableBox component
        // The hover state needs to use the whole sublist, not just the resizable box,
        // so that selector is below and one level higher.
        .react-resizable-handle {
            cursor: ns-resize;
            border-radius: 2px;

            // This is positioned directly below the 'show more' button.
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;

            // This is to visually align the bar in the list. Should be 12px from
            // either side of the list. We define this after the positioning to
            // trick the browser.
            margin-left: 4px;
            margin-right: 8px;
        }
    }

    // The aforementioned selector for the hover state.
    &:hover, &.mx_RoomSublist2_hasMenuOpen {
        .react-resizable-handle {
            opacity: 0.2;

            // Update the render() function for RoomSublist2 if this changes
            border: 2px solid $primary-fg-color;
        }

        .mx_RoomSublist2_headerContainer {
            // If the header doesn't have an aux button we still need to hide the badge for
            // the menu button.
            .mx_RoomSublist2_badgeContainer {
                // Completely hide the badge
                width: 0;
                margin: 0;
                visibility: hidden;
            }

            &:not(.mx_RoomSublist2_headerContainer_withAux) {
                // The menu button will be the rightmost button, so make it correctly aligned.
                .mx_RoomSublist2_menuButton {
                    margin-right: 16px;
                }
            }

            // Both of these buttons have circled backgrounds and are visible at this point,
            // so make them so.
            .mx_RoomSublist2_auxButton,
            .mx_RoomSublist2_menuButton {
                width: 24px;
                height: 24px;
                border-radius: 32px;
                margin-left: 16px;
                background-color: #fff; // TODO: Variable and theme
                visibility: visible;
            }
        }
    }
}

// We have a hover style on the room list with no specific list hovered, so account for that
.mx_RoomList2:hover .mx_RoomSublist2,
.mx_RoomSublist2_hasMenuOpen {
    .mx_RoomSublist2_headerContainer_withAux {
        .mx_RoomSublist2_badgeContainer {
            // Completely hide the badge
            width: 0;
            margin: 0;
            visibility: hidden;
        }

        .mx_RoomSublist2_auxButton {
            // Show the aux button, but not the list button
            width: 24px;
            height: 24px;
            margin-right: 16px;
            visibility: visible;
        }
    }
}

.mx_RoomSublist2_contextMenu {
    padding: 20px 16px;
    width: 250px;

    hr {
        margin-top: 16px;
        margin-bottom: 16px;
        margin-right: 16px; // additional 16px
        border: 1px solid $roomsublist2-divider-color;
    }

    .mx_RoomSublist2_contextMenu_title {
        font-size: $font-15px;
        line-height: $font-20px;
        font-weight: 600;
        margin-bottom: 12px;
    }
}