Fix spoiler reveal in full screen media viewer.

app/src/main/java/org/thoughtcrime/securesms/components/emoji/EmojiTextView.java

@@ -108,6 +108,11 @@ public class EmojiTextView extends AppCompatTextView {
     setEmojiCompatEnabled(useSystemEmoji());
   }
 
+  public void setMaxLength(int maxLength) {
+    this.maxLength = maxLength;
+    setText(getText());
+  }
+
   public void enableSpoilerFiltering() {
     spoilerFilteringSpannableFactory = new SpoilerFilteringSpannableFactory(() -> isInOnDraw);
     setSpannableFactory(spoilerFilteringSpannableFactory);

app/src/main/java/org/thoughtcrime/securesms/mediapreview/caption/ExpandingCaptionView.kt

@@ -1,7 +1,11 @@
 package org.thoughtcrime.securesms.mediapreview.caption
 
 import android.content.Context
-import android.text.method.ScrollingMovementMethod
+import android.graphics.Typeface
+import android.text.SpannableString
+import android.text.Spanned
+import android.text.method.LinkMovementMethod
+import android.text.style.StyleSpan
 import android.util.AttributeSet
 import android.view.ViewGroup
 import androidx.core.view.updateLayoutParams
@@ -26,7 +30,10 @@ class ExpandingCaptionView @JvmOverloads constructor(
     }
 
   init {
-    setOnClickListener { toggleExpansion() }
+    movementMethod = LinkMovementMethod.getInstance()
+    val overflow = SpannableString(context.getString(R.string.MediaPreviewFragment_read_more_overflow_text))
+    overflow.setSpan(StyleSpan(Typeface.BOLD), 0, overflow.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+    setOverflowText(overflow)
   }
 
   private fun toggleExpansion() {
@@ -40,19 +47,16 @@ class ExpandingCaptionView @JvmOverloads constructor(
 
   private fun updateExpansionState(expand: Boolean) {
     if (expand) {
+      setMaxLength(-1)
       text = fullCaptionText
-      movementMethod = ScrollingMovementMethod()
       scrollTo(0, 0)
       updateLayoutParams { height = expandedHeight }
     } else {
-      text = if (isExpandable()) {
-        context.getString(R.string.MediaPreviewFragment_see_more, fullCaptionText.substring(0, CHAR_LIMIT_MESSAGE_PREVIEW))
-      } else {
-        fullCaptionText
-      }
-      movementMethod = null
+      setMaxLength(CHAR_LIMIT_MESSAGE_PREVIEW)
+      text = fullCaptionText
       updateLayoutParams { height = ViewGroup.LayoutParams.WRAP_CONTENT }
     }
+
     if (isExpandable()) {
       setOnClickListener { toggleExpansion() }
     } else {

app/src/main/res/values/strings.xml

@@ -2153,7 +2153,7 @@
     <!-- This is displayed as a toast notification when we encounter an error deleting a message, including potentially on other people\'s devices -->
     <string name="MediaPreviewFragment_media_delete_error">Error Deleting Message, Message May Still Exist</string>
     <!-- A suffix to be attached to truncated captions that the user may tap onto to view the entire text caption -->
-    <string name="MediaPreviewFragment_see_more">%1$s… <b>Read More</b></string>
+    <string name="MediaPreviewFragment_read_more_overflow_text">Read More</string>
 
     <!-- MessageNotifier -->
     <string name="MessageNotifier_d_new_messages_in_d_conversations">%1$d new messages in %2$d conversations</string>