Stub out basic boundary detection

app/javascript/controllers/dialog_controller.js

@@ -1,5 +1,7 @@
 import { Controller } from "@hotwired/stimulus"
 
+const BOTTOM_THRESHOLD = 90
+
 export default class extends Controller {
   static targets = [ "dialog" ]
   static values = {
@@ -18,6 +20,7 @@ export default class extends Controller {
     } else {
       this.dialogTarget.show()
     }
+    this.#orient()
     this.dialogTarget.setAttribute('aria-hidden', 'false')
     this.dispatch("show")
   }
@@ -39,4 +42,25 @@ export default class extends Controller {
   closeOnClickOutside({ target }) {
     if (!this.element.contains(target)) this.close()
   }
+
+  #orient() {
+    console.log("ORIENT")
+    console.log(`distanceToBottom = ${this.#distanceToBottom}`)
+    console.log(`maxWidth = ${this.#maxWidth}px`)
+
+    this.dialogTarget.classList.toggle("ANDYSMITH", this.#distanceToBottom < BOTTOM_THRESHOLD)
+    this.dialogTarget.style.setProperty("--max-width", this.#maxWidth + "px")
+  }
+
+  get #distanceToBottom() {
+    return window.innerHeight - this.#boundingClientRect.bottom
+  }
+
+  get #maxWidth() {
+    return window.innerWidth - this.#boundingClientRect.left
+  }
+
+  get #boundingClientRect() {
+    return this.dialogTarget.getBoundingClientRect()
+  }
 }