From 045524f6a5701b8c5ce8a396b780eb31c119cf65 Mon Sep 17 00:00:00 2001
From: Justin Mazzocchi <2831158+jzzocc@users.noreply.github.com>
Date: Wed, 10 Mar 2021 17:40:03 -0800
Subject: [PATCH] Caption max height

---
 View Controllers/ImageViewController.swift | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/View Controllers/ImageViewController.swift b/View Controllers/ImageViewController.swift
index e6bb18d..ad4ac2c 100644
--- a/View Controllers/ImageViewController.swift	
+++ b/View Controllers/ImageViewController.swift	
@@ -111,6 +111,7 @@ final class ImageViewController: UIViewController {
             descriptionBackgroundView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
             descriptionBackgroundView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
             descriptionBackgroundView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+            descriptionTextView.heightAnchor.constraint(lessThanOrEqualTo: view.heightAnchor, multiplier: 1 / 4),
             descriptionTextView.leadingAnchor.constraint(
                 equalTo: descriptionBackgroundView.layoutMarginsGuide.leadingAnchor),
             descriptionTextView.topAnchor.constraint(equalTo: descriptionBackgroundView.topAnchor),
@@ -172,6 +173,15 @@ final class ImageViewController: UIViewController {
             ?? Attachment.AttachmentType.image.accessibilityName
         contentView.isAccessibilityElement = true
     }
+
+    override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+
+        let textHeight = descriptionTextView.sizeThatFits(.init(
+                                                            width: descriptionTextView.frame.width,
+                                                            height: .greatestFiniteMagnitude)).height
+        descriptionTextView.isScrollEnabled = textHeight > descriptionTextView.frame.height
+    }
 }
 
 extension ImageViewController {