Improved forum navigation

mixins/ForumTags.pixy

@@ -9,6 +9,6 @@ component ForumTags
 		ForumTag("Bugs", "bug", "list")
 
 component ForumTag(title string, category string, icon string)
-	a.button.forum-tag.ajax(href=strings.TrimSuffix("/forum/" + category, "/"))
+	a.button.forum-tag.action(href=strings.TrimSuffix("/forum/" + category, "/"), data-action="diff", data-trigger="click")
 		Icon(arn.GetForumIcon(category))
 		span.forum-tag-text= title

scripts/AnimeNotifier.ts

@@ -53,8 +53,8 @@ export class AnimeNotifier {
 		this.visibilityObserver.disconnect()
 		
 		// Update each of these asynchronously
-		Promise.resolve().then(() => this.updateMountables())
+		Promise.resolve().then(() => this.mountMountables())
-		Promise.resolve().then(() => this.updateActions())
+		Promise.resolve().then(() => this.assignActions())
 		Promise.resolve().then(() => this.lazyLoadImages())
 	}
 
@@ -75,7 +75,7 @@ export class AnimeNotifier {
 		}
 	}
 	
-	updateActions() {
+	assignActions() {
 		for(let element of findAll("action")) {
 			if(element["action assigned"]) {
 				continue
@@ -85,6 +85,9 @@ export class AnimeNotifier {
 
 			element.addEventListener(element.dataset.trigger, e => {
 				actions[actionName](this, element, e)
+
+				e.stopPropagation()
+				e.preventDefault()
 			})
 
 			// Use "action assigned" flag instead of removing the class.
@@ -121,15 +124,25 @@ export class AnimeNotifier {
 		this.visibilityObserver.observe(img)
 	}
 
-	updateMountables() {
+	mountMountables() {
+		this.modifyDelayed("mountable", element => element.classList.add("mounted"))
+	}
+
+	unmountMountables() {
+		for(let element of findAll("mounted")) {
+			element.classList.remove("mounted")
+		}
+	}
+
+	modifyDelayed(className: string, func: (element: HTMLElement) => void) {
 		const delay = 20
 		const maxDelay = 1000
 		
 		let time = 0
 
-		for(let element of findAll("mountable")) {
+		for(let element of findAll(className)) {
 			setTimeout(() => {
-				window.requestAnimationFrame(() => element.classList.add("mounted"))
+				window.requestAnimationFrame(() => func(element))
 			}, time)
 
 			time += delay

scripts/Application.ts

@@ -1,3 +1,5 @@
+import { Diff } from "./Diff"
+
 class LoadOptions {
 	addToHistory?: boolean
 	forceReload?: boolean
@@ -57,6 +59,10 @@ export class Application {
 	}
 
 	load(url: string, options?: LoadOptions) {
+		// Start sending a network request
+		let request = this.get("/_" + url).catch(error => error)
+
+		// Parse options
 		if(!options) {
 			options = new LoadOptions()
 		}
@@ -65,10 +71,12 @@ export class Application {
 			options.addToHistory = true
 		}
 		
+		// Set current path
 		this.currentPath = url
 
-		// Start sending a network request
+		// Add to browser history
-		let request = this.get("/_" + url).catch(error => error)
+		if(options.addToHistory)
+			history.pushState(url, null, url)
 
 		let onTransitionEnd = e => {
 			// Ignore transitions of child elements.
@@ -82,13 +90,8 @@ export class Application {
 
 			// Wait for the network request to end.
 			request.then(html => {
-				// Add to browser history
-				if(options.addToHistory)
-					history.pushState(url, null, url)
-				
 				// Set content
-				this.setContent(html)
+				this.setContent(html, false)
-				this.scrollToTop()
 
 				// Fade animations
 				this.content.classList.remove(this.fadeOutClass)
@@ -108,11 +111,16 @@ export class Application {
 		return request
 	}
 
-	setContent(html: string) {
+	setContent(html: string, diff: boolean) {
-		// Diff.innerHTML(this.content, html)
+		if(diff) {
+			Diff.innerHTML(this.content, html)
+		} else {
 			this.content.innerHTML = html
+		}
+
 		this.ajaxify(this.content)
 		this.markActiveLinks(this.content)
+		this.scrollToTop()
 	}
 
 	markActiveLinks(element?: HTMLElement) {

scripts/Diff.ts

@@ -1,18 +1,18 @@
 export class Diff {
-	static childNodes(aRoot: HTMLElement, bRoot: HTMLElement) {
+	static childNodes(aRoot: Node, bRoot: Node) {
 		let aChild = [...aRoot.childNodes]
 		let bChild = [...bRoot.childNodes]
 		let numNodes = Math.max(aChild.length, bChild.length)
 		
 		for(let i = 0; i < numNodes; i++) {
-			let a = aChild[i] as HTMLElement
+			let a = aChild[i]
 
 			if(i >= bChild.length) {
 				aRoot.removeChild(a)
 				continue
 			}
 
-			let b = bChild[i] as HTMLElement
+			let b = bChild[i]
 
 			if(i >= aChild.length) {
 				aRoot.appendChild(b)
@@ -24,38 +24,46 @@ export class Diff {
 				continue
 			}
 
+			if(a.nodeType === Node.TEXT_NODE) {
+				a.textContent = b.textContent
+				continue
+			}
+
 			if(a.nodeType === Node.ELEMENT_NODE) {
-				if(a.tagName === "IFRAME") {
+				let elemA = a as HTMLElement
+				let elemB = b as HTMLElement
+
+				if(elemA.tagName === "IFRAME") {
 					continue
 				}
 
 				let removeAttributes: Attr[] = []
 				
-				for(let x = 0; x < a.attributes.length; x++) {
+				for(let x = 0; x < elemA.attributes.length; x++) {
-					let attrib = a.attributes[x]
+					let attrib = elemA.attributes[x]
 
 					if(attrib.specified) {
-						if(!b.hasAttribute(attrib.name)) {
+						if(!elemB.hasAttribute(attrib.name)) {
 							removeAttributes.push(attrib)
 						}
 					}
 				}
 
 				for(let attr of removeAttributes) {
-					a.removeAttributeNode(attr)
+					elemA.removeAttributeNode(attr)
 				}
 
-				for(let x = 0; x < b.attributes.length; x++) {
+				for(let x = 0; x < elemB.attributes.length; x++) {
-					let attrib = b.attributes[x]
+					let attrib = elemB.attributes[x]
 
 					if(attrib.specified) {
-						a.setAttribute(attrib.name, b.getAttribute(attrib.name))
+						elemA.setAttribute(attrib.name, elemB.getAttribute(attrib.name))
 					}
 				}
 
 				// Special case: Apply state of input elements
-				if(a !== document.activeElement && a instanceof HTMLInputElement && b instanceof HTMLInputElement) {
+				if(elemA !== document.activeElement && elemA instanceof HTMLInputElement && elemB instanceof HTMLInputElement) {
-					a.value = b.value
+					elemA.value = elemB.value
 				}
 			}
 

scripts/actions.ts

@@ -1,6 +1,7 @@
 import { Application } from "./Application"
 import { AnimeNotifier } from "./AnimeNotifier"
 import { Diff } from "./Diff"
+import { delay, findAll } from "./utils"
 
 // Save new data from an input field
 export function save(arn: AnimeNotifier, input: HTMLInputElement | HTMLTextAreaElement) {
@@ -53,6 +54,36 @@ export function save(arn: AnimeNotifier, input: HTMLInputElement | HTMLTextAreaE
 	})
 }
 
+// Diff
+export function diff(arn: AnimeNotifier, element: HTMLElement) {
+	let url = element.dataset.url || (element as HTMLAnchorElement).getAttribute("href")
+	let request = fetch("/_" + url).then(response => response.text())
+
+	history.pushState(url, null, url)
+	arn.app.currentPath = url
+	arn.app.markActiveLinks()
+	arn.loading(true)
+	arn.unmountMountables()
+
+	// for(let element of findAll("mountable")) {
+	// 	element.classList.remove("mountable")
+	// }
+
+	delay(300).then(() => {
+		request
+		.then(html => arn.app.setContent(html, true))
+		.then(() => arn.app.markActiveLinks())
+		// .then(() => {
+		// 	for(let element of findAll("mountable")) {
+		// 		element.classList.remove("mountable")
+		// 	}
+		// })
+		.then(() => arn.app.emit("DOMContentLoaded"))
+		.then(() => arn.loading(false))
+		.catch(console.error)
+	})
+}
+
 // Search
 export function search(arn: AnimeNotifier, search: HTMLInputElement, e: KeyboardEvent) {
 	if(e.ctrlKey || e.altKey) {

scripts/utils.ts

@@ -7,3 +7,7 @@ export function* findAll(className: string) {
 		yield elements[i] as HTMLElement
 	}
 }
+
+export function delay<T>(millis: number, value?: T): Promise<T> {
+	return new Promise(resolve => setTimeout(() => resolve(value), millis))
+}