feat: support src collaborators (#5114)

* feat: support avatarURLfor collaborators

* fix

* better avatars :)

* use position fixed for tooltips so it renders correctly when offsets updated

* update docs

* Update src/excalidraw-app/collab/CollabWrapper.tsx

* rename avatarUrl to src

src/components/Avatar.scss

@@ -12,5 +12,11 @@
     cursor: pointer;
     font-size: 0.8rem;
     font-weight: 500;
+
+    &-img {
+      width: 100%;
+      height: 100%;
+      border-radius: 100%;
+    }
   }
 }

src/components/Avatar.tsx

@@ -1,20 +1,28 @@
 import "./Avatar.scss";
 
 import React from "react";
+import { getClientInitials } from "../clients";
 
 type AvatarProps = {
-  children: string;
   onClick: (e: React.MouseEvent<HTMLDivElement, MouseEvent>) => void;
   color: string;
   border: string;
+  name: string;
+  src?: string;
 };
 
-export const Avatar = ({ children, color, border, onClick }: AvatarProps) => (
-  <div
-    className="Avatar"
-    style={{ background: color, border: `1px solid ${border}` }}
-    onClick={onClick}
-  >
-    {children}
-  </div>
-);
+export const Avatar = ({ color, border, onClick, name, src }: AvatarProps) => {
+  const shortName = getClientInitials(name);
+  const style = src
+    ? undefined
+    : { background: color, border: `1px solid ${border}` };
+  return (
+    <div className="Avatar" style={style} onClick={onClick}>
+      {src ? (
+        <img className="Avatar-img" src={src} alt={shortName} />
+      ) : (
+        shortName
+      )}
+    </div>
+  );
+};

src/components/Tooltip.scss

@@ -2,7 +2,7 @@
 
 // container in body where the actual tooltip is appended to
 .excalidraw-tooltip {
-  position: absolute;
+  position: fixed;
   z-index: 1000;
 
   padding: 8px;