andy-stack_vaultkeeper-ai/Components/ChatArea.svelte
Andrew Beal aed4caf347 refactor: replace custom markdown pipeline with Obsidian's native MarkdownRenderer.
Fix reactive issue for web and chat mode display.

Rewrites StreamingMarkdownService to use Obsidian's built-in MarkdownRenderer
instead of the unified/remark/rehype/KaTeX stack, eliminating ~700 lines of
custom markdown processing, CSS, and streaming state management. Internal link
handling now relies on Obsidian's native .internal-link class and data-href
attributes. The streaming split-point algorithm (freeze completed blocks, re-render
the live tail) is preserved.
2026-05-25 16:25:22 +01:00

428 lines
No EOL
12 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";
export let messages: ConversationContent[] = [];
export let currentThought: string | null = null;
export let isSubmitting: boolean = false;
export let chatContainer: HTMLDivElement;
export function resetChatArea() {
autoScroll = true;
messageElements = [];
if (chatAreaPaddingElement) {
chatAreaPaddingElement.style.padding = "0px";
}
chatContainer.scroll({ top: 0, behavior: "instant" });
}
export function resetAutoScroll() {
autoScroll = true;
}
export async function updateChatAreaLayout(behavior: ScrollBehavior | undefined, shouldSettle: boolean = false) {
await tick();
if (!chatAreaPaddingElement) {
return;
}
if (messageElements.length <= 0) {
chatAreaPaddingElement.style.paddingBottom = "0px";
return;
}
requestAnimationFrame(() => {
applyLayout(behavior, shouldSettle);
});
}
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 && autoScroll) {
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 };
}
let autoScroll: boolean = true;
let lastScrollTop: number = 0;
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 });
}
// decide if we should be auto scrolling
function handleScroll() {
if (!chatContainer) {
return;
}
const scrollTop = chatContainer.scrollTop;
const scrollHeight = chatContainer.scrollHeight;
const clientHeight = chatContainer.clientHeight;
// Only process if the user actually scrolled (scrollTop changed)
// This prevents false triggers when content grows and pushes things down
if (scrollTop === lastScrollTop) {
return;
}
const previousScrollTop = lastScrollTop;
lastScrollTop = scrollTop;
// Check if we're at the bottom (with a small tolerance for rounding errors)
const isAtBottom = scrollHeight - scrollTop - clientHeight < 5;
if (isAtBottom) {
autoScroll = true;
} else if (scrollTop < previousScrollTop) {
autoScroll = false; // user scrolled up
}
}
$: {
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={handleScroll}>
{#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}
{@const messageId = message.timestamp.getTime().toString()}
<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-state">
<div class="typing-in">{getGreetingByTime()}</div>
</div>
{/if}
</div>
{#if messages.length > 0}
<div class="bottom-fade"></div>
{/if}
</div>
<style>
.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-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-state {
margin: auto;
font-style: italic;
font-size: var(--font-ui-medium);
color: var(--text-muted);
pointer-events: none;
}
.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>