💭 Message bubble layout

res/css/_components.scss

@@ -201,6 +201,7 @@
 @import "./views/rooms/_EditMessageComposer.scss";
 @import "./views/rooms/_EntityTile.scss";
 @import "./views/rooms/_EventTile.scss";
+@import "./views/rooms/_EventBubbleTile.scss";
 @import "./views/rooms/_GroupLayout.scss";
 @import "./views/rooms/_IRCLayout.scss";
 @import "./views/rooms/_JumpToBottomButton.scss";

res/css/views/avatars/_BaseAvatar.scss

@@ -27,6 +27,7 @@ limitations under the License.
     // https://bugzilla.mozilla.org/show_bug.cgi?id=255139
     display: inline-block;
     user-select: none;
+    line-height: 1;
 }
 
 .mx_BaseAvatar_initial {

res/css/views/messages/_MImageBody.scss

@@ -18,7 +18,6 @@ $timelineImageBorderRadius: 4px;
 
 .mx_MImageBody {
     display: block;
-    margin-right: 34px;
 }
 
 .mx_MImageBody_thumbnail {

res/css/views/messages/_ReactionsRow.scss

@@ -26,6 +26,7 @@ limitations under the License.
         height: 24px;
         vertical-align: middle;
         margin-left: 4px;
+        margin-right: 4px;
 
         &::before {
             content: '';

res/css/views/rooms/_EventBubbleTile.scss

@@ -0,0 +1,323 @@
+/*
+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_EventTile[data-layout=bubble],
+.mx_EventTile[data-layout=bubble] ~ .mx_EventListSummary {
+    --avatarSize: 32px;
+    --gutterSize: 11px;
+    --cornerRadius: 12px;
+    --maxWidth: 70%;
+}
+
+.mx_EventTile[data-layout=bubble] {
+
+    position: relative;
+    margin-top: var(--gutterSize);
+    margin-left: 50px;
+    margin-right: 100px;
+
+    &.mx_EventTile_continuation {
+        margin-top: 2px;
+    }
+
+    /* For replies */
+    .mx_EventTile {
+        padding-top: 0;
+    }
+
+    &:hover {
+        &::before {
+            content: '';
+            position: absolute;
+            top: -1px;
+            bottom: -1px;
+            left: -60px;
+            right: -60px;
+            z-index: -1;
+            background: $eventbubble-bg-hover;
+            border-radius: 4px;
+        }
+
+        .mx_EventTile_avatar {
+            img {
+                box-shadow: 0 0 0 3px $eventbubble-bg-hover;
+            }
+        }
+    }
+
+    .mx_SenderProfile,
+    .mx_EventTile_line {
+        width: fit-content;
+        max-width: 70%;
+    }
+
+    .mx_SenderProfile {
+        position: relative;
+        top: -2px;
+        left: 2px;
+    }
+
+    &[data-self=false] {
+        .mx_EventTile_line {
+            border-bottom-right-radius: var(--cornerRadius);
+        }
+        .mx_EventTile_avatar {
+            left: -34px;
+        }
+
+        .mx_MessageActionBar {
+            right: 0;
+            transform: translate3d(50%, 50%, 0);
+        }
+
+        --backgroundColor: $eventbubble-others-bg;
+    }
+    &[data-self=true] {
+        .mx_EventTile_line {
+            border-bottom-left-radius: var(--cornerRadius);
+            float: right;
+            > a {
+                left: auto;
+                right: -48px;
+            }
+        }
+        .mx_SenderProfile {
+            display: none;
+        }
+        .mx_ReactionsRow {
+            float: right;
+            clear: right;
+            display: flex;
+
+            /* Moving the "add reaction button" before the reactions */
+            > :last-child {
+                order: -1;
+            }
+        }
+        .mx_EventTile_avatar {
+            top: -19px; // height of the sender block
+            right: -35px;
+        }
+
+        --backgroundColor: $eventbubble-self-bg;
+    }
+
+    .mx_EventTile_line {
+        position: relative;
+        padding: var(--gutterSize);
+        border-top-left-radius: var(--cornerRadius);
+        border-top-right-radius: var(--cornerRadius);
+        background: var(--backgroundColor);
+        display: flex;
+        gap: 5px;
+        margin: 0 -12px 0 -9px;
+        > a {
+            position: absolute;
+            left: -48px;
+        }
+    }
+
+    &.mx_EventTile_continuation[data-self=false] .mx_EventTile_line {
+        border-top-left-radius: 0;
+    }
+    &.mx_EventTile_lastInSection[data-self=false] .mx_EventTile_line {
+        border-bottom-left-radius: var(--cornerRadius);
+    }
+
+    &.mx_EventTile_continuation[data-self=true] .mx_EventTile_line {
+        border-top-right-radius: 0;
+    }
+    &.mx_EventTile_lastInSection[data-self=true] .mx_EventTile_line {
+        border-bottom-right-radius: var(--cornerRadius);
+    }
+
+    .mx_EventTile_avatar {
+        position: absolute;
+        top: 0;
+        line-height: 1;
+        img {
+            box-shadow: 0 0 0 3px $eventbubble-avatar-outline;
+            border-radius: 50%;
+        }
+    }
+
+    &[data-has-reply=true] {
+        > .mx_EventTile_line {
+            flex-direction: column;
+        }
+
+        .mx_ReplyThread_show {
+            order: 99999;
+        }
+
+        .mx_ReplyThread {
+            margin: 0 calc(-1 * var(--gutterSize));
+
+            .mx_EventTile_reply {
+                max-width: 90%;
+                padding: 0;
+                > a {
+                    display: none !important;
+                }
+            }
+
+            .mx_EventTile {
+                display: flex;
+                gap: var(--gutterSize);
+                .mx_EventTile_avatar {
+                    position: static;
+                }
+                .mx_SenderProfile {
+                    display: none;
+                }
+            }
+        }
+    }
+
+    .mx_EditMessageComposer_buttons {
+        position: static;
+        padding: 0;
+        margin: 0;
+        background: transparent;
+    }
+
+    .mx_ReactionsRow {
+        margin-right: -18px;
+        margin-left: -9px;
+    }
+
+    .mx_ReplyThread {
+        border-left-width: 2px;
+        border-left-color: $eventbubble-reply-color;
+    }
+
+    &.mx_EventTile_bubbleContainer,
+    &.mx_EventTile_info,
+    & ~ .mx_EventListSummary[data-expanded=false] {
+        --backgroundColor: transparent;
+        --gutterSize: 0;
+
+        display: flex;
+        align-items: center;
+        justify-content: center;
+
+        .mx_EventTile_avatar {
+            position: static;
+            order: -1;
+            margin-right: 5px;
+        }
+    }
+
+    & ~ .mx_EventListSummary {
+        --maxWidth: 80%;
+        margin-left: calc(var(--avatarSize) + var(--gutterSize));
+        margin-right: calc(var(--gutterSize) + var(--avatarSize));
+        .mx_EventListSummary_toggle {
+            float: none;
+            margin: 0;
+            order: 9;
+            margin-left: 5px;
+        }
+        .mx_EventListSummary_avatars {
+            padding-top: 0;
+        }
+
+        &::after {
+            content: "";
+            clear: both;
+        }
+
+        .mx_EventTile {
+            margin: 0 6px;
+        }
+
+        .mx_EventTile_line {
+            margin: 0 5px;
+            > a {
+                left: auto;
+                right: 0;
+                transform: translateX(calc(100% + 5px));
+            }
+        }
+
+        .mx_MessageActionBar {
+            transform: translate3d(50%, 0, 0);
+        }
+    }
+
+    & ~ .mx_EventListSummary[data-expanded=false] {
+        padding: 0 34px;
+    }
+
+    /* events that do not require bubble layout */
+    & ~ .mx_EventListSummary,
+    &.mx_EventTile_bad {
+        .mx_EventTile_line {
+            background: transparent;
+        }
+
+        &:hover {
+            &::before {
+                background: transparent;
+            }
+        }
+    }
+
+    & + .mx_EventListSummary {
+        .mx_EventTile {
+            margin-top: 0;
+            padding: 0;
+        }
+    }
+
+    .mx_EventListSummary_toggle {
+        margin-right: 55px;
+    }
+
+    /* Special layout scenario for "Unable To Decrypt (UTD)" events */
+    &.mx_EventTile_bad > .mx_EventTile_line {
+        display: grid;
+        grid-template:
+            "reply reply" auto
+            "shield body" auto
+            "shield link" auto
+            / auto  1fr;
+        .mx_EventTile_e2eIcon {
+            grid-area: shield;
+        }
+        .mx_UnknownBody {
+            grid-area: body;
+        }
+        .mx_EventTile_keyRequestInfo {
+            grid-area: link;
+        }
+        .mx_ReplyThread_wrapper {
+            grid-area: reply;
+        }
+    }
+
+
+    .mx_EventTile_readAvatars {
+        position: absolute;
+        right: -110px;
+        bottom: 0;
+        top: auto;
+    }
+
+    .mx_MTextBody {
+        max-width: 100%;
+    }
+}