Fix compose attachment description text view not expanding to fit text

Tusker/Screens/Compose/ComposeAttachmentsViewController.swift

@@ -531,6 +531,12 @@ extension ComposeAttachmentsViewController: ComposeAttachmentTableViewCellDelega
     func attachmentDescriptionChanged(_ cell: ComposeAttachmentTableViewCell) {
         delegate?.composeRequiresAttachmentDescriptionsDidChange()
     }
+    
+    func composeAttachmentDescriptionHeightChanged(_ cell: ComposeAttachmentTableViewCell) {
+        tableView.performBatchUpdates(nil) { (_) in
+            self.updateHeightConstraint()
+        }
+    }
 }
 
 extension ComposeAttachmentsViewController: ComposeDrawingViewControllerDelegate {

Tusker/Views/Attachment Cells/ComposeAttachmentTableViewCell.swift

@@ -15,6 +15,7 @@ protocol ComposeAttachmentTableViewCellDelegate: class {
     func composeAttachment(_ cell: ComposeAttachmentTableViewCell, present viewController: UIViewController, animated: Bool)
     func removeAttachment(_ cell: ComposeAttachmentTableViewCell)
     func attachmentDescriptionChanged(_ cell: ComposeAttachmentTableViewCell)
+    func composeAttachmentDescriptionHeightChanged(_ cell: ComposeAttachmentTableViewCell)
 }
 
 class ComposeAttachmentTableViewCell: UITableViewCell {
@@ -23,6 +24,7 @@ class ComposeAttachmentTableViewCell: UITableViewCell {
 
     @IBOutlet weak var assetImageView: UIImageView!
     @IBOutlet weak var descriptionTextView: UITextView!
+    @IBOutlet weak var descriptionTextViewHeightConstraint: NSLayoutConstraint!
     @IBOutlet weak var descriptionPlaceholderLabel: UILabel!
     @IBOutlet weak var removeButton: UIButton!
     @IBOutlet weak var activityIndicator: UIActivityIndicatorView!
@@ -142,6 +144,7 @@ class ComposeAttachmentTableViewCell: UITableViewCell {
     override func prepareForReuse() {
         super.prepareForReuse()
         assetImageView.image = nil
+        descriptionTextViewHeightConstraint.constant = 80
     }
 
     @IBAction func removeButtonPressed(_ sender: Any) {
@@ -162,5 +165,12 @@ extension ComposeAttachmentTableViewCell: UITextViewDelegate {
         attachment.attachmentDescription = textView.text
         updateDescriptionPlaceholderLabel()
         delegate?.attachmentDescriptionChanged(self)
+        let smallestSize = textView.sizeThatFits(CGSize(width: textView.bounds.width, height: .greatestFiniteMagnitude))
+        let old = descriptionTextViewHeightConstraint.constant
+        descriptionTextViewHeightConstraint.constant = max(80, smallestSize.height)
+        if old != descriptionTextViewHeightConstraint.constant {
+            delegate?.composeAttachmentDescriptionHeightChanged(self)
+        }
+
     }
 }

Tusker/Views/Attachment Cells/ComposeAttachmentTableViewCell.xib

@@ -36,6 +36,9 @@
                             <textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" scrollEnabled="NO" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="cwP-Eh-5dJ">
                                 <rect key="frame" x="84" y="0.0" width="194" height="80"/>
                                 <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" relation="greaterThanOrEqual" constant="80" id="6aZ-w8-j9n"/>
+                                </constraints>
                                 <color key="textColor" systemColor="labelColor" cocoaTouchSystemColor="darkTextColor"/>
                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                 <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
@@ -79,6 +82,7 @@
                 <outlet property="assetImageView" destination="GLY-o8-47z" id="hZH-ur-m4z"/>
                 <outlet property="descriptionPlaceholderLabel" destination="h6T-x4-yzl" id="jBe-R0-Sfn"/>
                 <outlet property="descriptionTextView" destination="cwP-Eh-5dJ" id="pxJ-zF-GKC"/>
+                <outlet property="descriptionTextViewHeightConstraint" destination="6aZ-w8-j9n" id="ees-sT-Trc"/>
                 <outlet property="removeButton" destination="Lvf-I9-aV3" id="3qk-Zr-je1"/>
             </connections>
             <point key="canvasLocation" x="107" y="181"/>