andy-stack_vaultkeeper-ai/Components/ChatArea.svelte
Andrew Beal 4f57798295 feat: add animated graph background to empty chat state
Replace static greeting with animated node graph visualization behind the greeting text. Adds GraphAnimation component with procedural graph generation, smooth node motion, and gradient backdrop effect.
2026-07-06 14:22:51 +01:00

490 lines
No EOL
13 KiB
Svelte

<script lang="ts">
import { Resolve } from "Services/DependencyService";
import { Services } from "Services/Services";
import type { StreamingMarkdownService } from "Services/StreamingMarkdownService";
import ThoughtIndicator from "./ThoughtIndicator.svelte";
import StreamingIndicator from "./StreamingIndicator.svelte";
import { Greeting } from "Enums/Greeting";
import { Role } from "Enums/Role";
import type { ConversationContent } from "Conversations/ConversationContent";
import { tick } from "svelte";
import { getOuterHeight, setElementIcon } from "Helpers/ElementHelper";
import { setIcon } from "obsidian";
import { fade } from "svelte/transition";
import GraphAnimation from "./GraphAnimation.svelte";
export let messages: ConversationContent[] = [];
export let currentThought: string | null = null;
export let isSubmitting: boolean = false;
export let chatContainer: HTMLDivElement;
export function resetChatArea() {
messageElements = [];
if (chatAreaPaddingElement) {
chatAreaPaddingElement.style.padding = "0px";
}
chatContainer.scroll({ top: 0, behavior: "instant" });
tick().then(updateScrolledState);
}
export async function updateChatAreaLayout(behavior: ScrollBehavior | undefined = undefined, shouldSettle: boolean = false) {
await tick();
if (!chatAreaPaddingElement) {
return;
}
if (messageElements.length <= 0) {
chatAreaPaddingElement.style.paddingBottom = "0px";
return;
}
requestAnimationFrame(() => {
applyLayout(behavior, shouldSettle);
updateScrolledState();
});
}
function applyLayout(behavior: ScrollBehavior | undefined, shouldSettle: boolean) {
if (!chatAreaPaddingElement || messageElements.length <= 0) {
return;
}
const styles = getComputedStyle(chatContainer);
const gap = parseFloat(styles.gap) || 0;
const paddingTop = parseFloat(styles.paddingTop) || 0;
const paddingBottom = parseFloat(styles.paddingBottom) || 0;
const sortedMessages = messageElements.sort((a, b) => a.index - b.index);
let result = calculateMessageHeight(sortedMessages);
let contentHeight = result.height + (gap * (result.count - 1));
if (!shouldSettle) {
if (thoughtIndicatorElement) {
contentHeight += getOuterHeight(thoughtIndicatorElement) + gap;
}
if (streamingIndicatorElement) {
contentHeight += getOuterHeight(streamingIndicatorElement) + gap;
}
}
const availableHeight = chatContainer.offsetHeight - paddingTop - paddingBottom;
let padding = shouldSettle
? Math.max(0, availableHeight - contentHeight)
: Math.max(25, availableHeight - contentHeight);
chatAreaPaddingElement.style.paddingBottom = `${padding}px`;
if (behavior) {
chatContainer.scroll({ top: chatContainer.scrollHeight, behavior });
}
}
function calculateMessageHeight(sortedMessages: { element: HTMLElement, index: number, role: Role }[]): { count: number, height: number } {
const lastMessage = sortedMessages[sortedMessages.length - 1];
if (lastMessage.role === Role.User) {
return { count: 1, height: getOuterHeight(lastMessage.element) };
}
let count = 0;
let height = 0;
for (const message of sortedMessages.reverse()) {
if (message.role === Role.User) {
break;
}
height += getOuterHeight(message.element);
count++;
}
return { count: count, height: height };
}
function updateScrolledState() {
if (!chatContainer) {
return;
}
const isScrollable = chatContainer.scrollHeight > chatContainer.clientHeight;
scrolledToBottom = !isScrollable || Math.abs(chatContainer.scrollHeight - chatContainer.scrollTop - chatContainer.clientHeight) < 100;
}
let scrolledToBottom: boolean = true;
let scrollToBottomButton: HTMLButtonElement;
let chatAreaPaddingElement: HTMLElement | undefined;
let thoughtIndicatorElement: HTMLElement | undefined;
let streamingIndicatorElement: HTMLElement | undefined;
let streamingMarkdownService: StreamingMarkdownService = Resolve<StreamingMarkdownService>(Services.StreamingMarkdownService);
let messageElements: { element: HTMLElement, index: number, role: Role }[] = [];
function getGreetingByTime(): string {
const hour = new Date().getHours();
// Morning: 5am - 11:59am
if (hour >= 5 && hour < 12) {
return Greeting.Morning;
}
// Midday: 12pm - 4:59pm
else if (hour >= 12 && hour < 17) {
return Greeting.Midday;
}
// Evening: 5pm - 8:59pm
else if (hour >= 17 && hour < 21) {
return Greeting.Evening;
}
// Night: 9pm - 4:59am
else {
return Greeting.Night;
}
}
function messageRenderAction(element: HTMLElement, message: ConversationContent) {
streamingMarkdownService.render(message.getDisplayContent(), element);
return {
update(newMessage: ConversationContent) {
streamingMarkdownService.render(newMessage.getDisplayContent(), element, !isSubmitting);
}
};
}
function trackingAction(element: HTMLElement, { index, role }: { index: number, role: Role }) {
messageElements.push({ index: index, element: element, role: role });
}
$: if (scrollToBottomButton) {
setIcon(scrollToBottomButton, "arrow-down");
}
$: {
if (messages.length === 0 && chatAreaPaddingElement) {
chatAreaPaddingElement.style.padding = "0px";
}
}
</script>
<div class="chat-area-wrapper">
{#if messages.length > 0}
<div class="top-fade"></div>
{/if}
<div class="chat-area" bind:this={chatContainer} on:scroll={updateScrolledState}>
{#each messages as message, index}
{@const content = message.getDisplayContent()}
{#if message.shouldDisplayContent && content.trim() !== ""}
{#if message.role === Role.User}
<div class="message-container {Role.User}" use:trackingAction={{ index, role: Role.User }}>
<div class="message-bubble {Role.User}">
<div class="message-text-user-container" contenteditable="false">
<div class="message-text-user">
{@html content}
</div>
</div>
{#if message.references.length > 0}
<hr class="message-attachment-break"/>
<div class="message-attachments-container">
{#each message.references as reference}
<div class="message-attachmanet" aria-label="{reference.fileName}">
<div
class="message-attachment-icon"
use:setElementIcon={reference.getIconName()}
></div>
<div class="message-attachment-info">
<div class="message-attachment-name">{reference.fileName}</div>
<div class="message-attachment-size">{reference.size}MB</div>
</div>
</div>
{/each}
</div>
{/if}
</div>
</div>
{:else}
<div class="message-container {Role.Assistant}" use:trackingAction={{ index, role: Role.Assistant }}>
<div class="message-bubble {Role.Assistant}">
<div class="markdown-content">
<div use:messageRenderAction={message} class="streaming-content"></div>
</div>
</div>
</div>
{/if}
{/if}
{/each}
<ThoughtIndicator thought={currentThought} bind:thoughtIndicatorElement={thoughtIndicatorElement}/>
{#if isSubmitting}
<StreamingIndicator bind:streamingIndicatorElement={streamingIndicatorElement}/>
{/if}
<div bind:this={chatAreaPaddingElement} style:user-select=none></div>
{#if messages.length === 0}
<div class="conversation-empty-container">
<div class="conversation-empty-animation">
<GraphAnimation/>
</div>
<div class="conversation-empty-greeting">
<div class="conversation-empty-greeting-backdrop"></div>
<div class="conversation-empty-greeting-label">{getGreetingByTime()}</div>
</div>
</div>
{/if}
</div>
{#if messages.length > 0}
<div class="bottom-fade"></div>
{/if}
{#if !scrolledToBottom}
<div class="scroll-to-bottom-container" transition:fade>
<button
id="scroll-to-bottom-button"
bind:this={scrollToBottomButton}
on:click={() => updateChatAreaLayout("smooth")}
aria-label="Scroll to bottom">
</button>
</div>
{/if}
</div>
<style>
.scroll-to-bottom-container {
background-color: color-mix(in srgb, var(--background-primary) 70%, transparent);
border-radius: var(--radius-l);
padding: var(--size-4-2);
position: absolute;
bottom: var(--size-4-2);
right: 0px;
}
#scroll-to-bottom-button {
background-color: var(--interactive-accent);
}
.chat-area-wrapper {
position: relative;
height: 100%;
width: 100%;
}
.top-fade {
position: absolute;
top: 0;
left: 0;
right: 0;
height: var(--size-4-4);
background-image: linear-gradient(to bottom, var(--background-secondary), transparent);
z-index: 10;
pointer-events: none;
}
.bottom-fade {
position: absolute;
bottom: 0;
left: 0;
right: 0;
height: var(--size-4-4);
background-image: linear-gradient(to top, var(--background-secondary), transparent);
z-index: 10;
pointer-events: none;
}
.chat-area {
position: relative;
display: flex;
flex-direction: column;
height: 100%;
overflow: auto;
padding: var(--size-4-4) var(--size-4-3) var(--size-4-3) var(--size-4-3);
gap: var(--size-4-2);
scroll-behavior: smooth;
}
.chat-area::-webkit-scrollbar {
display: none;
}
.message-container {
display: flex;
text-align: left;
margin: 0;
}
.message-container.user {
justify-content: flex-end;
}
.message-container.assistant {
justify-content: flex-start;
}
.message-container {
animation: fadeIn 0.5s ease-out forwards;
}
@keyframes fadeIn {
from {
opacity: 0;
transform: translateY(5px);
}
to {
opacity: 1;
transform: translateY(0);
}
}
.message-bubble {
word-wrap: break-word;
}
.message-bubble.user {
word-wrap: break-word;
max-width: 70%;
border: var(--border-width) solid var(--background-modifier-border);
border-radius: var(--radius-m);
padding: 0px var(--size-4-2);
}
.message-bubble.assistant {
word-wrap: break-word;
max-width: 100%;
}
.message-text-user-container {
max-height: 15vh;
overflow: scroll;
padding-top: var(--size-4-2);
white-space: pre-wrap;
}
.message-text-user-container::-webkit-scrollbar {
display: none;
}
.message-text-user-container {
padding-bottom: var(--size-4-2);
}
.conversation-empty-container {
display: grid;
height: 100%;
width: 100%;
}
.conversation-empty-animation {
grid-row: 1;
grid-column: 1;
height: 100%;
width: 100%;
}
.conversation-empty-greeting-backdrop {
position: absolute;
inset: -48px;
background: radial-gradient(
ellipse closest-side,
var(--background-secondary) 0%,
color-mix(in srgb, var(--background-secondary) 80%, transparent) 65%,
transparent 100%
);
}
.conversation-empty-greeting {
grid-row: 1;
grid-column: 1;
position: relative;
margin: auto;
font-style: italic;
font-size: var(--font-ui-medium);
color: var(--text-muted);
pointer-events: none;
}
.conversation-empty-greeting-label {
position: relative;
overflow: hidden;
white-space: nowrap;
padding: var(--size-2-2);
}
.streaming-content {
justify-content: left;
min-height: 1em; /* Ensure the element exists for binding */
}
/* Streaming message styles */
.content-fade-in {
animation: reveal-fade 0.5s ease-in-out forwards;
}
@keyframes reveal-fade {
0% {
opacity: 0;
transform: translateY(10px);
}
100% {
opacity: 1;
transform: translateY(0);
}
}
/* Message attachments styles */
.message-attachment-break {
color: var(--background-secondary-alt);
margin: 0 0 var(--size-4-2) 0;
opacity: 0.5;
}
.message-attachments-container {
display: flex;
overflow-x: auto;
overflow-y: hidden;
scroll-behavior: smooth;
gap: var(--size-4-2);
margin-bottom: var(--size-4-2);
}
.message-attachments-container::-webkit-scrollbar {
display: none;
}
.message-attachmanet {
display: grid;
grid-template-rows: var(--size-4-2) auto var(--size-4-2);
grid-template-columns: var(--size-4-2) auto var(--size-4-2) auto var(--size-4-2);
background-color: var(--background-secondary-alt);
border: var(--border-width) solid var(--background-modifier-border);
border-radius: var(--radius-m);
flex-shrink: 0;
}
.message-attachment-icon {
grid-row: 2;
grid-column: 2;
display: flex;
align-items: center;
justify-content: center;
}
.message-attachment-info {
grid-row: 2;
grid-column: 4;
min-width: 40px;
overflow: hidden;
}
.message-attachment-name {
display: inline-block;
white-space: nowrap;
width: 100%;
padding: 0;
font-size: var(--font-smaller);
}
.message-attachment-size {
padding: 0;
font-size: var(--font-smallest);
color: var(--text-muted);
}
</style>