riot-web/res/css/views/rooms/_IRCLayout.pcss

/*
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.
*/

:root {
    --irc-line-height: $font-18px;
}

.mx_IRCLayout {
    --name-width: 80px; /* cf. ircDisplayNameWidth on Settings.tsx */
    --icon-width: 14px;
    --line-height: var(--irc-line-height);
    --right-padding: 5px;

    line-height: var(--line-height) !important;

    blockquote {
        margin: 0;
    }

    .mx_NewRoomIntro {
        > h2 {
            line-height: initial; /* Cancel var(--irc-line-height) */
        }
    }

    .mx_ReplyChain {
        .mx_DisambiguatedProfile {
            width: unset;
            background: transparent;
            order: unset;
            flex-shrink: unset; /* Unset flex-shrink to prevent long display name blowout */
        }

        .mx_EventTile_emote {
            > .mx_EventTile_avatar {
                margin-left: initial;
            }
        }

        .mx_MessageTimestamp {
            width: initial;
        }

        /**
         * adding the icon back in the document flow
         * if it's not present, there's no unwanted wasted space
         */
        .mx_EventTile_e2eIcon {
            position: relative;
            order: -1;
        }
    }

    .mx_ProfileResizer {
        --resizer-width: 15px;
        --resizer-a11y: 3px; /* Magic number, to be replaced with something more proper from the perspective of a11y */

        position: absolute;
        height: 100%;
        width: var(--resizer-width);
        cursor: col-resize;
        z-index: 100;

        /* Add width of every element rendered before the resizer (including padding for the avatar and the display
           name), subtracting the resizer width itself to prevent the resizer from overlapping the text and moving
           the resizer a bit to the left to make it easier to avoid selecting the resizer when highlighting text.
           Please note that MessageTimestamp does not have inline padding. */
        inset-inline-start: calc(
            var(--RoomView_MessageList-padding) + var(--MessageTimestamp-width) + var(--icon-width) +
                var(--right-padding) + var(--name-width) + var(--right-padding) - var(--resizer-width) -
                var(--resizer-a11y)
        );
    }
}