Implement event permalink pills

Author: weeman1337

res/css/views/elements/_Pill.pcss

@@ -55,12 +55,17 @@ limitations under the License.
         min-width: $font-16px; /* ensure the avatar is not compressed */
     }
 
-    .mx_Pill_linkText {
-        white-space: nowrap; /* enforce the pill text to be a single line */
-        overflow: hidden;
-        text-overflow: ellipsis;
+    &.mx_EventPill .mx_BaseAvatar {
+        /* Event pill avatars are inside the text. */
+        margin-inline-start: 0.2em;
+        margin-inline-end: 0.2em;
+    }
 
+    .mx_Pill_content {
+        overflow: hidden;
         pointer-events: none; /* ensure clicks on the pills go through the anchor */
+        text-overflow: ellipsis;
+        white-space: nowrap;
     }
 
     a& {
@@ -69,4 +74,20 @@ limitations under the License.
         overflow: hidden;
         text-decoration: none !important; /* To override .markdown-body */
     }
+
+    .mx_Pill_LinkIcon {
+        background-color: $link-external;
+        box-sizing: border-box;
+        color: $background;
+        height: 16px;
+        padding: 1px;
+        width: 16px;
+    }
+
+    .mx_Pill_UserIcon {
+        box-sizing: border-box;
+        color: $secondary-content;
+        height: 16px;
+        width: 16px;
+    }
 }

res/img/compound/user.svg

@@ -90,6 +90,7 @@ $room-icon-unread-color: #fff;
 $accent: #0dbd8b;
 $alert: #ff5b55;
 $links: #0086e6;
+$link-external: #0467dd;
 $primary-content: $primary-fg-color;
 $secondary-content: $secondary-fg-color;
 $tertiary-content: $tertiary-fg-color;

res/themes/legacy-dark/css/_legacy-dark.pcss

@@ -149,6 +149,7 @@ $presence-busy: #ff5b55;
 $accent: #0dbd8b;
 $alert: #ff5b55;
 $links: #0086e6;
+$link-external: #0467dd;
 $primary-content: $primary-fg-color;
 $secondary-content: $secondary-fg-color;
 $tertiary-content: $tertiary-fg-color;

res/themes/legacy-light/css/_legacy-light.pcss

@@ -41,6 +41,7 @@ $space-nav: rgba($tertiary-content, 0.15);
 $accent: #0dbd8b;
 $alert: #ff5b55;
 $links: #0086e6;
+$link-external: #0467dd;
 
 $username-variant1-color: #368bd6;
 $username-variant2-color: #ac3ba8;

res/themes/light/css/_light.pcss

@@ -17,18 +17,24 @@ limitations under the License.
 import React, { ReactElement, useState } from "react";
 import classNames from "classnames";
 import { Room } from "matrix-js-sdk/src/models/room";
+import { RoomMember } from "matrix-js-sdk/src/matrix";
 
 import { MatrixClientPeg } from "../../../MatrixClientPeg";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import Tooltip, { Alignment } from "../elements/Tooltip";
 import { usePermalink } from "../../../hooks/usePermalink";
 import RoomAvatar from "../avatars/RoomAvatar";
 import MemberAvatar from "../avatars/MemberAvatar";
+import { _t } from "../../../languageHandler";
+import { Icon as LinkIcon } from "../../../../res/img/element-icons/room/composer/link.svg";
+import { Icon as UserIcon } from "../../../../res/img/compound/user.svg";
 
 export enum PillType {
     UserMention = "TYPE_USER_MENTION",
     RoomMention = "TYPE_ROOM_MENTION",
     AtRoomMention = "TYPE_AT_ROOM_MENTION", // '@room' mention
+    EventInSameRoom = "TYPE_EVENT_IN_SAME_ROOM",
+    EventInOtherRoom = "TYPE_EVENT_IN_OTHER_ROOM",
 }
 
 export const pillRoomNotifPos = (text: string): number => {
@@ -39,6 +45,34 @@ export const pillRoomNotifLen = (): number => {
     return "@room".length;
 };
 
+const PillRoomAvatar: React.FC<{
+    shouldShowPillAvatar: boolean;
+    room: Room | null;
+}> = ({ shouldShowPillAvatar, room }) => {
+    if (!shouldShowPillAvatar) {
+        return null;
+    }
+
+    if (room) {
+        return <RoomAvatar room={room} width={16} height={16} aria-hidden="true" />;
+    }
+    return <LinkIcon className="mx_Pill_LinkIcon mx_BaseAvatar mx_BaseAvatar_image" />;
+};
+
+const PillMemberAvatar: React.FC<{
+    shouldShowPillAvatar: boolean;
+    member: RoomMember | null;
+}> = ({ shouldShowPillAvatar, member }) => {
+    if (!shouldShowPillAvatar) {
+        return null;
+    }
+
+    if (member) {
+        return <MemberAvatar member={member} width={16} height={16} aria-hidden="true" hideTitle />;
+    }
+    return <UserIcon className="mx_Pill_UserIcon mx_BaseAvatar mx_BaseAvatar_image" />;
+};
+
 export interface PillProps {
     // The Type of this Pill. If url is given, this is auto-detected.
     type?: PillType;
@@ -70,6 +104,7 @@ export const Pill: React.FC<PillProps> = ({ type: propType, url, inMessage, room
         mx_SpacePill: type === "space",
         mx_UserPill: type === PillType.UserMention,
         mx_UserPill_me: resourceId === MatrixClientPeg.get().getUserId(),
+        mx_EventPill: type === PillType.EventInOtherRoom || type === PillType.EventInSameRoom,
     });
 
     const onMouseOver = (): void => {
@@ -81,28 +116,55 @@ export const Pill: React.FC<PillProps> = ({ type: propType, url, inMessage, room
     };
 
     const tip = hover && resourceId ? <Tooltip label={resourceId} alignment={Alignment.Right} /> : null;
-    let avatar: ReactElement | null = null;
+    let content: ReactElement | null = null;
 
     switch (type) {
+        case PillType.EventInOtherRoom:
+            {
+                const avatar = <PillRoomAvatar shouldShowPillAvatar={shouldShowPillAvatar} room={targetRoom} />;
+                content = (
+                    <>
+                        {_t("Message in")}
+                        {avatar || " "}
+                        {text}
+                    </>
+                );
+            }
+            break;
+        case PillType.EventInSameRoom:
+            {
+                const avatar = <PillMemberAvatar shouldShowPillAvatar={shouldShowPillAvatar} member={member} />;
+                content = (
+                    <>
+                        {_t("Message from")}
+                        {avatar || " "}
+                        {text}
+                    </>
+                );
+            }
+            break;
         case PillType.AtRoomMention:
         case PillType.RoomMention:
         case "space":
-            avatar = targetRoom ? <RoomAvatar room={targetRoom} width={16} height={16} aria-hidden="true" /> : null;
+            content = (
+                <>
+                    <PillRoomAvatar shouldShowPillAvatar={shouldShowPillAvatar} room={targetRoom} />
+                    {text}
+                </>
+            );
             break;
         case PillType.UserMention:
-            avatar = <MemberAvatar member={member} width={16} height={16} aria-hidden="true" hideTitle />;
+            content = (
+                <>
+                    <PillMemberAvatar shouldShowPillAvatar={shouldShowPillAvatar} member={member} />
+                    {text}
+                </>
+            );
             break;
         default:
             return null;
     }
 
-    const content = (
-        <>
-            {shouldShowPillAvatar && avatar}
-            <span className="mx_Pill_linkText">{text}</span>
-        </>
-    );
-
     return (
         <bdi>
             <MatrixClientContext.Provider value={MatrixClientPeg.get()}>
@@ -114,12 +176,12 @@ export const Pill: React.FC<PillProps> = ({ type: propType, url, inMessage, room
                         onMouseOver={onMouseOver}
                         onMouseLeave={onMouseLeave}
                     >
-                        {content}
+                        <span className="mx_Pill_content">{content}</span>
                         {tip}
                     </a>
                 ) : (
                     <span className={classes} onMouseOver={onMouseOver} onMouseLeave={onMouseLeave}>
-                        {content}
+                        <span className="mx_Pill_content">{content}</span>
                         {tip}
                     </span>
                 )}