feat: implement whisper, (double)click on avatar

Users can insert a mention by clicking, and initiate a whisper by
double-clicking on the avatar on a user's chat message

src/lib/ChatMessage.svelte

@@ -1,6 +1,10 @@
 <script lang="ts">
  import type { Message } from "fedwave-chat-client";
- import { room, username } from "./chat";
+ import { room } from "./chat";
+
+ import { createEventDispatcher } from "svelte";
+ const dispatch = createEventDispatcher();
+
  export let globalMode = false;
  export let message: Message;
  export let isHeader: boolean = true;
@@ -8,7 +12,11 @@
 
 <div class="message d-flex p-relative pl-8 pr-24" class:subseq="{!isHeader}">
     {#if isHeader}
-	<div class="avatar radius-pill overflow-hidden no-select" style="background-color: {message.color}">
+	<!-- TODO: Use <Avatar/> here	 -->
+	<div class="avatar radius-pill overflow-hidden no-select clickable"
+	     on:click="{() => dispatch('avatar:click', message)}"
+	     on:dblclick="{() => dispatch('avatar:dblclick', message)}"
+	     style="background-color: {message.color}">
 	    <img class="w-100" alt="{message.username}'s avatar" src="{message.avatar || '/troll_haz2.png'}">
 	</div>
     {/if}

src/lib/ChatMessages.svelte

@@ -18,6 +18,8 @@
   let viewport: Element, contents: Element;
   let tweet: HTMLAudioElement;
 
+  let input: string = '';
+
   shouldTweet.subscribe((should) => {
     if (should) {
       if (tweet) {
@@ -91,6 +93,10 @@
     bind:viewport
     bind:contents
     on:scroll={onScroll}
+    on:avatar:click={(e) => (
+      (input += ` @${e.detail.username}#${e.detail.unum} `), (input = input.trim())
+    )}
+    on:avatar:dblclick={(e) => (input = `/w ${e.detail.username}#${e.detail.unum} `)}
   />
   {#if !stickToBottom}
     <FAB --background={'var(--base-700)'} on:click={() => scrollToBottom()}
@@ -98,7 +104,7 @@
     >
   {/if}
 </div>
-<Input />
+<Input bind:input />
 
 <style>
   .scroller {

src/lib/Input.svelte

@@ -1,11 +1,20 @@
 <script lang="ts">
  import { tick } from "svelte"
- import { send } from "./chat";
+ import { send, whisper } from "./chat";
 
- let input = "";
+ export let input = "";
  async function keydown(e: KeyboardEvent) {
      if(e.key === "Enter") {
-	 send(input);
+	 console.log(e);
+	 const tokens = input.trim().split(" ");
+
+	 if(tokens[0] === '/w') {
+	     const who = tokens[1];
+	     const m = tokens.slice(2).join(' ');
+	     whisper(who, m);
+	 } else {
+	     send(input);
+	 }
 	 e.preventDefault();
 	 await tick();
 	 input = "";

src/lib/MessageView.svelte

@@ -12,7 +12,10 @@
 <div class="viewport" bind:this={viewport} on:scroll>
     <div class="contents" bind:this={contents}>
 	{#each messages as message}
-            <ChatMessage message={message.m} isHeader={message.isHeader} globalMode={showChannel} />
+            <ChatMessage message={message.m}
+			 isHeader={message.isHeader}
+			 globalMode={showChannel}
+			 on:avatar:click on:avatar:dblclick />
 	{/each}
     </div>
 </div>

src/lib/chat.ts

@@ -20,6 +20,10 @@ export function send(m: string | OutgoingMessage) {
   chat.sendMessage(m);
 }
 
+export function whisper(who: string, m: string) {
+  chat.sendWhisper(who, m);
+}
+
 let setConnected: Subscriber<boolean> | undefined;
 export const connected = readable<boolean>(false, (setf) => {
   setConnected = setf;

src/lib/styles/utils.scss

@@ -37,6 +37,10 @@
     flex-grow: 0;
 }
 
+.shrink-0 {
+    flex-shrink: 0;
+}
+
 .basis-0 {
     flex-basis: 0;
 }
@@ -62,8 +66,10 @@
     }
 }
 
-.d-flex {
-    display: flex;
+@each $i in (block, inline, inline-block, flex, grid, contents) {
+    .d-#{$i} {
+	display: #{$i};
+    }
 }
 
 .col {
@@ -82,9 +88,16 @@
     width: 100vw;
 }
 
+.mw-0 { min-width: 0 }
+
 .w-100 { width: 100%; }
 .h-100 { height: 100%; }
 
+.ellipsis {
+    text-overflow: ellipsis;
+    overflow: hidden;
+}
+
 .hide-scrollbar {
     /* hide scrollbar */
     -ms-overflow-style: none !important;