Implement new Read Receipt design (#8389)

* feat: introduce new alignment types for tooltip
* feat: introduce new hook for tooltips
* feat: allow using onFocus callback for RovingAccessibleButton
* feat: allow using custom class for ContextMenu
* feat: allow setting tab index for avatar
* refactor: move read receipts out of event tile
* feat: implement new read receipt design
* feat: update SentReceipt to match new read receipts as well

res/css/_components.scss

@@ -248,6 +248,7 @@
 @import "./views/rooms/_NotificationBadge.scss";
 @import "./views/rooms/_PinnedEventTile.scss";
 @import "./views/rooms/_PresenceLabel.scss";
+@import "./views/rooms/_ReadReceiptGroup.scss";
 @import "./views/rooms/_RecentlyViewedButton.scss";
 @import "./views/rooms/_ReplyPreview.scss";
 @import "./views/rooms/_ReplyTile.scss";

res/css/views/right_panel/_TimelineCard.scss

@@ -125,8 +125,8 @@ limitations under the License.
         padding-left: 36px;
     }
 
-    .mx_EventTile_readAvatars {
-        top: -10px;
+    .mx_ReadReceiptGroup {
+        top: -6px;
     }
 
     .mx_WhoIsTypingTile {

res/css/views/rooms/_EventBubbleTile.scss

@@ -447,7 +447,7 @@ limitations under the License.
         }
     }
 
-    .mx_EventTile_readAvatars {
+    .mx_ReadReceiptGroup {
         position: absolute;
         right: -78px; // as close to right gutter without clipping as possible
         bottom: 0;
@@ -585,8 +585,8 @@ limitations under the License.
             right: 127px; // align with that of right-column bubbles
         }
 
-        .mx_EventTile_readAvatars {
-            right: -18px; // match alignment to RRs of chat bubbles
+        .mx_ReadReceiptGroup {
+            right: -14px; // match alignment to RRs of chat bubbles
         }
 
         &::before {

res/css/views/rooms/_EventTile.scss

@@ -22,20 +22,18 @@ $left-gutter: 64px;
 
     .mx_EventTile_receiptSent,
     .mx_EventTile_receiptSending {
-        // Give it some dimensions so the tooltip can position properly
+        position: relative;
         display: inline-block;
-        width: 14px;
-        height: 14px;
-        // We don't use `position: relative` on the element because then it won't line
-        // up with the other read receipts
+        width: 16px;
+        height: 16px;
 
         &::before {
             background-color: $tertiary-content;
             mask-repeat: no-repeat;
             mask-position: center;
-            mask-size: 14px;
-            width: 14px;
-            height: 14px;
+            mask-size: 16px;
+            width: 16px;
+            height: 16px;
             content: '';
             position: absolute;
             top: 0;
@@ -349,36 +347,6 @@ $left-gutter: 64px;
     }
 }
 
-.mx_EventTile_readAvatars {
-    position: relative;
-    display: inline-block;
-    width: 14px;
-    height: 14px;
-    // This aligns the avatar with the last line of the
-    // message. We want to move it one line up - 2.2rem
-    top: -2.2rem;
-    user-select: none;
-    z-index: 1;
-}
-
-.mx_EventTile_readAvatars .mx_BaseAvatar {
-    position: absolute;
-    display: inline-block;
-    height: $font-14px;
-    width: $font-14px;
-
-    will-change: left, top;
-    transition:
-        left var(--transition-short) ease-out,
-        top var(--transition-standard) ease-out;
-}
-
-.mx_EventTile_readAvatarRemainder {
-    color: $event-timestamp-color;
-    font-size: $font-11px;
-    position: absolute;
-}
-
 .mx_EventTile_bigEmoji {
     font-size: 48px;
     line-height: 57px;

res/css/views/rooms/_GroupLayout.scss

@@ -97,7 +97,7 @@ $left-gutter: 64px;
             top: 3px;
         }
 
-        .mx_EventTile_readAvatars {
+        .mx_ReadReceiptGroup {
             // This aligns the avatar with the last line of the
             // message. We want to move it one line up - 2rem
             top: -2rem;

res/css/views/rooms/_IRCLayout.scss

@@ -49,8 +49,8 @@ $irc-line-height: $font-18px;
             order: 5;
             flex-shrink: 0;
 
-            .mx_EventTile_readAvatars {
-                top: 0.2rem; // ($irc-line-height - avatar height) / 2
+            .mx_ReadReceiptGroup {
+                top: -0.3rem; // ($irc-line-height - avatar height) / 2
             }
         }
 

res/css/views/rooms/_ReadReceiptGroup.scss

@@ -0,0 +1,146 @@
+/*
+Copyright 2022 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_ReadReceiptGroup {
+    position: relative;
+    display: inline-block;
+    // This aligns the avatar with the last line of the
+    // message. We want to move it one line up
+    // See .mx_GroupLayout .mx_EventTile .mx_EventTile_line in _GroupLayout.scss
+    top: calc(-$font-22px - 3px);
+    user-select: none;
+    z-index: 1;
+
+    .mx_ReadReceiptGroup_button {
+        display: inline-flex;
+        flex-direction: row;
+        height: 16px;
+        padding: 4px;
+        border-radius: 6px;
+
+        &.mx_AccessibleButton {
+            &:hover {
+                background: $event-selected-color;
+            }
+        }
+    }
+
+    .mx_ReadReceiptGroup_remainder {
+        color: $secondary-content;
+        font-size: $font-11px;
+        line-height: $font-16px;
+        margin-right: 4px;
+    }
+
+    .mx_ReadReceiptGroup_container {
+        position: relative;
+        display: block;
+        height: 100%;
+
+        .mx_BaseAvatar {
+            position: absolute;
+            display: inline-block;
+            height: 14px;
+            width: 14px;
+            border: 1px solid $background;
+            border-radius: 100%;
+
+            will-change: left, top;
+            transition:
+                left var(--transition-short) ease-out,
+                top var(--transition-standard) ease-out;
+        }
+    }
+}
+
+.mx_ReadReceiptGroup_popup {
+    max-height: 300px;
+    width: 220px;
+    border-radius: 8px;
+    display: flex;
+    flex-direction: column;
+    text-align: left;
+    font-size: 12px;
+    line-height: 15px;
+
+    right: 0;
+
+    &.mx_ContextualMenu_top {
+        top: 8px;
+    }
+
+    &.mx_ContextualMenu_bottom {
+        bottom: 8px;
+    }
+
+    .mx_ReadReceiptGroup_title {
+        font-size: 12px;
+        line-height: 15px;
+        margin: 16px 16px 8px;
+        font-weight: 600;
+        // shouldn’t be actually focusable
+        outline: none;
+    }
+
+    .mx_AutoHideScrollbar {
+        .mx_ReadReceiptGroup_person {
+            display: flex;
+            flex-direction: row;
+            padding: 4px;
+            margin: 0 12px;
+            border-radius: 8px;
+
+            &:hover {
+                background: $menu-selected-color;
+            }
+
+            &:last-child {
+                margin-bottom: 8px;
+            }
+
+            .mx_BaseAvatar {
+                margin: 6px 8px;
+                align-self: center;
+                justify-self: center;
+            }
+
+            .mx_ReadReceiptGroup_name {
+                display: flex;
+                flex-direction: column;
+                flex-grow: 1;
+                flex-shrink: 1;
+                overflow: hidden;
+
+                p {
+                    margin: 2px 0;
+                    text-overflow: ellipsis;
+                    overflow: hidden;
+                    white-space: nowrap;
+                }
+
+                .mx_ReadReceiptGroup_secondary {
+                    color: $secondary-content;
+                }
+            }
+        }
+    }
+}
+
+.mx_ReadReceiptGroup_person--tooltip {
+    overflow-y: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}