riot-web/res/css/views/right_panel/_ThreadPanel.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_ThreadPanel {
    display: flex;
    flex-direction: column;

    padding-right: 0;

    .mx_BaseCard_header {
        padding: 6px 8px 6px 0;

        .mx_BaseCard_close,
        .mx_BaseCard_back {
            margin-top: 15px;
        }

        .mx_BaseCard_close {
            right: -8px;
        }
    }

    .mx_ThreadPanel__header {
        width: calc(100% - 60px);
        margin-left: 30px;
        display: flex;
        flex: 1;
        justify-content: space-between;

        span:first-of-type {
            font-weight: 600;
            font-size: 15px;
            line-height: 18px;
            color: $secondary-content;
        }

        .mx_AccessibleButton {
            font-size: 12px;
            color: $secondary-content;
        }

        .mx_ContextualMenu_wrapper {
            // It's added here due to some weird error if I pass it directly in the style, even though it's a numeric value, so it's being passed 0 instead.
            // The error: react_devtools_backend.js:2526 Warning: `NaN` is an invalid value for the `top` css style property.
            top: 43px;
        }

        .mx_ContextualMenu {
            position: initial;
            span:first-of-type {
                font-weight: 600;
                font-size: 12px;
                color: $primary-content;
            }

            font-size: 12px;
            color: $secondary-content;
        }

        .mx_ThreadPanel_Header_FilterOptionItem {
            display: flex;
            flex-grow: 1;
            justify-content: space-between;
            flex-direction: column;
            overflow: visible;
            width: 100%;
            padding: 20px;
            padding-left: 30px;
            position: relative;

            &:hover {
                background-color: $event-selected-color;
            }
            &[aria-selected="true"] {
                &::before {
                    content: "";
                    width: 12px;
                    height: 12px;
                    grid-column: 1;
                    grid-row: 1;
                    mask-image: url("$(res)/img/feather-customised/check.svg");
                    mask-size: 100%;
                    mask-repeat: no-repeat;
                    position: absolute;
                    top: 22px;
                    left: 10px;
                    background-color: $primary-content;
                }
            }
        }
    }

    .mx_ThreadPanel_button {
        width: 20px;
        height: 20px;
        margin-top: -3px;
        margin-bottom: auto;
        position: relative;

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

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

    .mx_AutoHideScrollbar {
        border-radius: 8px;
    }

    .mx_RoomView_messageListWrapper {
        background-color: $background;
        padding: 8px;
        border-radius: inherit;
    }

    .mx_ScrollPanel {
        .mx_RoomView_MessageList {
            padding: 0;
        }
    }

    .mx_EventTile, .mx_EventListSummary {
        // Account for scrollbar when hovering
        width: calc(100% - 3px);
        margin: 0 2px;
        padding-top: 0;

        .mx_ThreadInfo {
            position: relative;
            padding-right: 11px;
            &::after {
                content: '';
                display: block;
                position: absolute;
                left: 0;
                bottom: -16px;
                height: 1px;
                width: 100%;
                border-bottom: 1px solid $message-action-bar-border-color;
            }
        }

        .mx_DateSeparator {
            display: none;
        }
    }

    .mx_MessageComposer {
        background-color: $background;
        border-radius: 8px;
        margin-top: 8px;
        width: calc(100% - 8px);
        padding: 0 8px;
        box-sizing: border-box;
    }
}

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

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