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

.mx_UserMenuButton {
    // No special styles on the button itself
}

.mx_UserMenuButton_contextMenu {
    width: 231px;

    // Put 20px of padding around the whole menu. We do this instead of a
    // simple `padding: 20px` rule so the horizontal rules added by the
    // optionLists is rendered correctly (full width).
    > * {
        padding-left: 20px;
        padding-right: 20px;

        &:first-child {
            padding-top: 20px;
        }

        &:last-child {
            padding-bottom: 20px;
        }
    }

    .mx_UserMenuButton_contextMenu_header {
        // Create a flexbox to organize the header a bit easier
        display: flex;
        align-items: center;

        &:nth-child(n + 1) {
            // The first header will have appropriate padding, subsequent ones need a margin.
            margin-top: 10px;
        }

        .mx_UserMenuButton_contextMenu_name {
            // Create another flexbox of columns to handle large user IDs
            display: flex;
            flex-direction: column;

            // fit the container
            flex: 1;
            width: calc(100% - 40px); // 40px = 32px theme button + 8px margin to theme button

            * {
                // Automatically grow all subelements to fit the container
                flex: 1;
                width: 100%;

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

            .mx_UserMenuButton_contextMenu_displayName {
                font-weight: bold;
                font-size: $font-15px;
                line-height: $font-20px;
            }

            .mx_UserMenuButton_contextMenu_userId {
                font-size: $font-15px;
                line-height: $font-24px;
            }
        }

        .mx_UserMenuButton_contextMenu_themeButton {
            min-width: 32px;
            max-width: 32px;
            width: 32px;
            height: 32px;
            margin-left: 8px;
            border-radius: 32px;
            background-color: $theme-button-bg-color;
            cursor: pointer;

            // to make alignment easier, create flexbox for the image
            display: flex;
            align-items: center;
            justify-content: center;
        }
    }

    .mx_UserMenuButton_contextMenu_optionList {
        margin-top: 20px;

        // This is a bit of a hack when we could just use a simple border-top property,
        // however we have a (kinda) good reason for doing it this way: we need opacity.
        // To get the right color, we need an opacity modifier which means we have to work
        // around the problem. PostCSS doesn't support the opacity() function, and if we
        // use something like postcss-functions we quickly run into an issue where the
        // function we would define gets passed a CSS variable for custom themes, which
        // can't be converted easily even when considering https://stackoverflow.com/a/41265350/7037379
        //
        // Therefore, we just hack in a line and border the thing ourselves
        &::before {
            border-top: 1px solid $primary-fg-color;
            opacity: 0.1;
            content: '';

            // Counteract the padding problems (width: 100% ignores the 40px padding,
            // unless we position it absolutely then it does the right thing).
            width: 100%;
            position: absolute;
            left: 0;
        }

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

            li {
                margin: 0;
                padding: 20px 0 0;

                .mx_AccessibleButton {
                    text-decoration: none;
                    color: $primary-fg-color;
                    font-size: $font-15px;
                    line-height: $font-24px;

                    // Create a flexbox to more easily define the list items
                    display: flex;
                    align-items: center;

                    img { // icons
                        width: 16px;
                        min-width: 16px;
                        max-width: 16px;
                    }

                    span { // labels
                        padding-left: 14px;
                        width: 100%;
                        flex: 1;

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