morphdom & better images

static/css/chat.css

@@ -52,7 +52,7 @@ body {
 	margin: auto;
 	margin-top: 30px;
 	width: 100%;
-	max-width: 1100px;
+	max-width: 1200px;
 	height: calc(100% - 30px);
 	border-top-left-radius: 6px;
 	border-top-right-radius: 6px;

static/css/markdown.css

@@ -70,14 +70,10 @@
 	text-decoration-color: rgba(183, 189, 248, 0.6);
 }
 
-.markdown .image {
+.markdown img {
 	max-width: 100%;
 	border-radius: 6px;
-	margin: 12px auto;
 	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
-	background-position: center;
-	background-size: cover;
-	background-repeat: no-repeat;
 }
 
 .markdown blockquote {

static/index.html

@@ -62,6 +62,7 @@
 
 		<script src="lib/highlight.min.js"></script>
 		<script src="lib/marked.min.js"></script>
+		<script src="lib/morphdom.min.js"></script>
 		<script src="js/lib.js"></script>
 		<script src="js/markdown.js"></script>
 		<script src="js/dropdown.js"></script>

static/js/chat.js

@@ -14,17 +14,20 @@
 
 	const messages = [];
 
-	let autoScrolling = false, interacted = false;
+	let autoScrolling = false,
+		interacted = false;
 
 	function scroll(force = false) {
 		if (!autoScrolling && !force) {
 			return;
 		}
 
-		$messages.scroll({
+		setTimeout(() => {
-			top: $messages.scrollHeight + 200,
+			$messages.scroll({
-			behavior: "smooth",
+				top: $messages.scrollHeight + 200,
-		});
+				behavior: "smooth",
+			});
+		}, 0);
 	}
 
 	class Message {
@@ -37,6 +40,10 @@
 		#expanded = false;
 		#state = false;
 
+		#_diff;
+		#pending = {};
+		#patching = {};
+
 		#_message;
 		#_role;
 		#_reasoning;
@@ -49,10 +56,16 @@
 			this.#reasoning = reasoning || "";
 			this.#text = text || "";
 
+			this.#_diff = document.createElement("div");
+
 			this.#build();
 			this.#render();
 
 			messages.push(this);
+
+			if (this.#reasoning || this.#text) {
+				this.#save();
+			}
 		}
 
 		#build() {
@@ -165,38 +178,81 @@
 			scroll();
 		}
 
+		#handleImages(element) {
+			element.querySelectorAll("img:not(.image)").forEach((img) => {
+				img.classList.add("image");
+
+				img.addEventListener("load", () => {
+					scroll(!interacted);
+				});
+			});
+		}
+
+		#patch(name, element, md, after = false) {
+			if (!element.firstChild) {
+				element.innerHTML = render(md);
+
+				this.#handleImages(element);
+
+				after?.();
+
+				return;
+			}
+
+			this.#pending[name] = md;
+
+			if (this.#patching[name]) {
+				return;
+			}
+
+			this.#patching[name] = true;
+
+			schedule(() => {
+				const html = render(this.#pending[name]);
+
+				this.#patching[name] = false;
+
+				this.#_diff.innerHTML = html;
+
+				morphdom(element, this.#_diff, {
+					childrenOnly: true,
+					onBeforeElUpdated: (fromEl, toEl) => {
+						return !fromEl.isEqualNode || !fromEl.isEqualNode(toEl);
+					},
+				});
+
+				this.#_diff.innerHTML = "";
+
+				this.#handleImages(element);
+
+				after?.();
+			});
+		}
+
 		#render(only = false, noScroll = false) {
 			if (!only || only === "role") {
 				this.#_role.textContent = this.#role;
 			}
 
 			if (!only || only === "reasoning") {
-				this.#_reasoning.innerHTML = render(this.#reasoning);
+				this.#patch("reasoning", this.#_reasoning, this.#reasoning, () => {
+					this.#_reasoning.style.setProperty(
+						"--height",
+						`${this.#_reasoning.scrollHeight}px`,
+					);
 
-				if (this.#reasoning) {
+					noScroll || scroll();
-					this.#_message.classList.add("has-reasoning");
+				});
-				} else {
-					this.#_message.classList.remove("has-reasoning");
-				}
 
-				this.#_reasoning.style.setProperty(
+				this.#_message.classList.toggle("has-reasoning", !!this.#reasoning);
-					"--height",
-					`${this.#_reasoning.scrollHeight}px`,
-				);
 			}
 
 			if (!only || only === "text") {
-				this.#_text.innerHTML = render(this.#text);
+				this.#patch("text", this.#_text, this.#text, () => {
+					noScroll || scroll();
+				});
 
-				if (this.#text) {
+				this.#_message.classList.toggle("has-text", !!this.#text);
-					this.#_message.classList.add("has-text");
-				} else {
-					this.#_message.classList.remove("has-text");
-				}
-			}
-
-			if (!noScroll) {
-				scroll();
 			}
 		}
 
@@ -555,8 +611,6 @@
 					return;
 				}
 
-				console.debug(chunk);
-
 				switch (chunk.type) {
 					case "reason":
 						message.setState("reasoning");
@@ -585,10 +639,6 @@
 		interacted = true;
 	});
 
-	addEventListener("image-loaded", () => {
-		scroll(!interacted);
-	});
-
 	dropdown($role);
 	dropdown($prompt);
 

static/js/lib.js

@@ -28,6 +28,16 @@ function loadValue(key, fallback = false) {
 	return fallback;
 }
 
+function schedule(cb) {
+	if (document.visibilityState === "visible") {
+		requestAnimationFrame(cb);
+
+		return;
+	}
+
+	setTimeout(cb, 80);
+}
+
 function uid() {
 	return `${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;
 }

static/js/markdown.js

@@ -1,6 +1,5 @@
 (() => {
-	const timeouts = new WeakMap(),
+	const timeouts = new WeakMap();
-		images = {};
 
 	marked.use({
 		async: false,
@@ -36,48 +35,9 @@
 
 				return `<pre>${header}<code>${code.text}</code></pre>`;
 			},
-
-			image(image) {
-				const { href } = image;
-
-				const id = `i_${btoa(href).replace(/=/g, "")}`,
-					style = prepareImage(id, href) || "";
-
-				return `<div class="image ${id}" style="${style}"></div>`;
-			},
 		},
 	});
 
-	function prepareImage(id, href) {
-		if (href in images) {
-			return images[href];
-		}
-
-		images[href] = false;
-
-		const image = new Image();
-
-		image.addEventListener("load", () => {
-			const style = `aspect-ratio:${image.naturalWidth}/${image.naturalHeight};width:${image.naturalWidth}px;background-image:url(${href})`;
-
-			images[href] = style;
-
-			document.querySelectorAll(`.image.${id}`).forEach((img) => {
-				img.setAttribute("style", style);
-			});
-
-			window.dispatchEvent(new Event("image-loaded"));
-		});
-
-		image.addEventListener("error", () => {
-			console.error(`Failed to load image: ${href}`);
-		});
-
-		image.src = href;
-
-		return false;
-	}
-
 	document.body.addEventListener("click", (event) => {
 		const button = event.target,
 			header = button.closest(".pre-header"),