Description improvements (#1846)

* Increase character limit for media descriptions to 1500

It was increased in Mastodon 3.0.0 which was released in October 2019.

* Improve image description view

Since media descriptions can be longer now, we need to adjust the UI.
It is a common problem that description takes up the whole screen, it's
hard for readers and also discourages people from adding descriptions.

This commit uses bottom sheet to hide most of the description. Since we
know how much screen space it will cover, we can use darker background
which makes reading text easier.

* Adjust description handle

* Fix unable to dismiss image caption

app/src/main/java/com/keylesspalace/tusky/adapter/StatusBaseViewHolder.java

@@ -805,7 +805,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
             itemView.setAccessibilityDelegate(null);
         } else {
             if (payloads instanceof List)
-                for (Object item : (List) payloads) {
+                for (Object item : (List<?>) payloads) {
                     if (Key.KEY_CREATED.equals(item)) {
                         setCreatedAt(status.getCreatedAt(), statusDisplayOptions);
                     }

app/src/main/java/com/keylesspalace/tusky/components/compose/dialog/CaptionDialog.kt

@@ -41,9 +41,8 @@ import com.keylesspalace.tusky.R
 import com.keylesspalace.tusky.util.withLifecycleContext
 import java.io.File
 
-// https://github.com/tootsuite/mastodon/blob/1656663/app/models/media_attachment.rb#L94
-private const val MEDIA_DESCRIPTION_CHARACTER_LIMIT = 420
-
+// https://github.com/tootsuite/mastodon/blob/c6904c0d3766a2ea8a81ab025c127169ecb51373/app/models/media_attachment.rb#L32
+private const val MEDIA_DESCRIPTION_CHARACTER_LIMIT = 1500
 
 fun <T> T.makeCaptionDialog(existingDescription: String?,
                             previewUri: Uri,

app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt

@@ -22,16 +22,9 @@ import android.content.Context
 import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.os.Bundle
-import android.util.Log
 import android.view.*
-import android.widget.TextView
-import androidx.exifinterface.media.ExifInterface
 import com.bumptech.glide.Glide
-import com.bumptech.glide.load.DataSource
-import com.bumptech.glide.load.engine.GlideException
-import com.bumptech.glide.request.RequestListener
 import com.bumptech.glide.request.target.CustomTarget
-import com.bumptech.glide.request.target.Target
 import com.bumptech.glide.request.transition.Transition
 import com.github.piasy.biv.BigImageViewer
 import com.github.piasy.biv.loader.ImageLoader
@@ -69,15 +62,19 @@ class ViewImageFragment : ViewMediaFragment() {
     private var previewUri = Uri.EMPTY
     private var showingPreview = false
 
-    override lateinit var descriptionView: TextView
     override fun onAttach(context: Context) {
         super.onAttach(context)
         photoActionsListener = context as PhotoActionsListener
     }
 
-    override fun setupMediaView(url: String, previewUrl: String?) {
-        descriptionView = mediaDescription
+    override fun setupMediaView(url: String,
+                                previewUrl: String?,
+                                description: String?,
+                                showingDescription: Boolean) {
         photoView.transitionName = url
+        mediaDescription.text = description
+        captionSheet.visible(showingDescription)
+
         startedTransition = false
         uri = Uri.parse(url)
         if(previewUrl != null && !previewUrl.equals(url)) {
@@ -91,8 +88,6 @@ class ViewImageFragment : ViewMediaFragment() {
         return inflater.inflate(R.layout.fragment_view_image, container, false)
     }
 
-    private lateinit var gestureDetector : GestureDetector
-
     private val imageOnTouchListener = object : View.OnTouchListener {
         private var lastY = 0.0f
         private var swipeStartedWithOneFinger = false
@@ -100,7 +95,6 @@ class ViewImageFragment : ViewMediaFragment() {
         override fun onTouch(v: View, event: MotionEvent): Boolean {
             // This part is for scaling/translating on vertical move.
             // We use raw coordinates to get the correct ones during scaling
-            gestureDetector.onTouchEvent(event)
 
             if(event.pointerCount != 1) {
                 onGestureEnd()
@@ -143,13 +137,6 @@ class ViewImageFragment : ViewMediaFragment() {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        gestureDetector = GestureDetector(requireContext(), object : GestureDetector.SimpleOnGestureListener() {
-            override fun onSingleTapConfirmed(e: MotionEvent?): Boolean {
-                onMediaTap()
-                return true
-            }
-        })
-
         photoView.setImageLoaderCallback(imageLoaderCallback)
         photoView.setImageViewFactory(GlideImageViewFactory())
 
@@ -190,10 +177,10 @@ class ViewImageFragment : ViewMediaFragment() {
         }
         isDescriptionVisible = showingDescription && visible
         val alpha = if (isDescriptionVisible) 1.0f else 0.0f
-        descriptionView.animate().alpha(alpha)
+        captionSheet.animate().alpha(alpha)
                 .setListener(object : AnimatorListenerAdapter() {
                     override fun onAnimationEnd(animation: Animator) {
-                        descriptionView.visible(isDescriptionVisible)
+                        captionSheet.visible(isDescriptionVisible)
                         animation.removeListener(this)
                     }
                 })

app/src/main/java/com/keylesspalace/tusky/fragment/ViewMediaFragment.kt

@@ -17,18 +17,20 @@ package com.keylesspalace.tusky.fragment
 
 import android.os.Bundle
 import android.text.TextUtils
-import android.widget.TextView
-
 import com.keylesspalace.tusky.ViewMediaActivity
 import com.keylesspalace.tusky.entity.Attachment
-import com.keylesspalace.tusky.util.visible
 
 abstract class ViewMediaFragment : BaseFragment() {
     private var toolbarVisibiltyDisposable: Function0<Boolean>? = null
 
-    abstract fun setupMediaView(url: String, previewUrl: String?)
+    abstract fun setupMediaView(
+            url: String,
+            previewUrl: String?,
+            description: String?,
+            showingDescription: Boolean
+    )
+
     abstract fun onToolbarVisibilityChange(visible: Boolean)
-    abstract val descriptionView: TextView
 
     protected var showingDescription = false
     protected var isDescriptionVisible = false
@@ -36,6 +38,7 @@ abstract class ViewMediaFragment : BaseFragment() {
     companion object {
         @JvmStatic
         protected val ARG_START_POSTPONED_TRANSITION = "startPostponedTransition"
+
         @JvmStatic
         protected val ARG_ATTACHMENT = "attach"
         @JvmStatic
@@ -74,13 +77,10 @@ abstract class ViewMediaFragment : BaseFragment() {
 
     protected fun finalizeViewSetup(url: String, previewUrl: String?, description: String?) {
         val mediaActivity = activity as ViewMediaActivity
-        setupMediaView(url, previewUrl)
 
-        descriptionView.text = description ?: ""
         showingDescription = !TextUtils.isEmpty(description)
         isDescriptionVisible = showingDescription
-
-        descriptionView.visible(showingDescription && mediaActivity.isToolbarVisible)
+        setupMediaView(url, previewUrl, description, showingDescription && mediaActivity.isToolbarVisible)
 
         toolbarVisibiltyDisposable = (activity as ViewMediaActivity)
                 .addToolbarVisibilityListener { isVisible ->

app/src/main/java/com/keylesspalace/tusky/fragment/ViewVideoFragment.kt

@@ -26,7 +26,6 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.MediaController
-import android.widget.TextView
 import com.keylesspalace.tusky.R
 import com.keylesspalace.tusky.ViewMediaActivity
 import com.keylesspalace.tusky.entity.Attachment
@@ -47,7 +46,6 @@ class ViewVideoFragment : ViewMediaFragment() {
     }
     private lateinit var mediaActivity: ViewMediaActivity
     private val TOOLBAR_HIDE_DELAY_MS = 3000L
-    override lateinit var descriptionView : TextView
     private lateinit var mediaController : MediaController
     private var isAudio = false
 
@@ -71,8 +69,14 @@ class ViewVideoFragment : ViewMediaFragment() {
     }
 
     @SuppressLint("ClickableViewAccessibility")
-    override fun setupMediaView(url: String, previewUrl: String?) {
-        descriptionView = mediaDescription
+    override fun setupMediaView(
+            url: String,
+            previewUrl: String?,
+            description: String?,
+            showingDescription: Boolean
+    ) {
+        mediaDescription.text = description
+        mediaDescription.visible(showingDescription)
 
         videoView.transitionName = url
         videoView.setVideoPath(url)
@@ -178,14 +182,14 @@ class ViewVideoFragment : ViewMediaFragment() {
         val alpha = if (isDescriptionVisible) 1.0f else 0.0f
         if (isDescriptionVisible) {
             // If to be visible, need to make visible immediately and animate alpha
-            descriptionView.alpha = 0.0f
-            descriptionView.visible(isDescriptionVisible)
+            mediaDescription.alpha = 0.0f
+            mediaDescription.visible(isDescriptionVisible)
         }
 
-        descriptionView.animate().alpha(alpha)
+        mediaDescription.animate().alpha(alpha)
                 .setListener(object : AnimatorListenerAdapter() {
                     override fun onAnimationEnd(animation: Animator) {
-                        descriptionView.visible(isDescriptionVisible)
+                        mediaDescription.visible(isDescriptionVisible)
                         animation.removeListener(this)
                     }
                 })

app/src/main/res/drawable/description_bg_expanded.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <corners
+        android:topLeftRadius="6dp"
+        android:topRightRadius="6dp" />
+    <stroke
+        android:color="?attr/colorBackgroundAccent"
+        android:width="1dp" />
+    <solid android:color="#B3000000" />
+</shape>

app/src/main/res/drawable/ic_drag_indicator_horiz_24dp.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape android:shape="rectangle"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <size
+        android:width="8dp"
+        android:height="1dp" />
+    <solid android:color="?attr/colorBackgroundAccent" />
+    <corners android:radius="1dp" />
+</shape>

app/src/main/res/layout/fragment_view_image.xml

@@ -26,18 +26,56 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <TextView
-        android:id="@+id/mediaDescription"
+    <!--    This should be inside CoordinatorLayout for two reasons:
+
+            1. TouchImageView really wants some constraints ans has no size otherwise
+            2. We don't want sheet to overlap with appbar but the only way to do it with autosizing
+            is to gibe parent some margin. -->
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:background="#60000000"
-        android:hyphenationFrequency="full"
-        android:lineSpacingMultiplier="1.1"
-        android:padding="8dp"
-        android:textAlignment="center"
-        android:textColor="#eee"
-        android:textSize="?attr/status_text_medium"
+        android:layout_height="0dp"
+        android:layout_marginTop="70dp"
         app:layout_constraintBottom_toBottomOf="parent"
-        tools:text="Some media description" />
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <LinearLayout
+            android:id="@+id/captionSheet"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@drawable/description_bg_expanded"
+            android:orientation="vertical"
+            app:behavior_peekHeight="90dp"
+            app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
+
+            <View
+                android:layout_width="24dp"
+                android:layout_height="3dp"
+                android:layout_marginTop="10dp"
+                android:layout_marginBottom="10dp"
+                android:layout_gravity="center_horizontal"
+                android:importantForAccessibility="no"
+                android:background="@drawable/ic_drag_indicator_horiz_24dp" />
+
+            <androidx.core.widget.NestedScrollView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
 
+                <TextView
+                    android:id="@+id/mediaDescription"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hyphenationFrequency="full"
+                    android:lineSpacingMultiplier="1.1"
+                    android:paddingLeft="8dp"
+                    android:paddingRight="8dp"
+                    android:paddingBottom="8dp"
+                    android:textAlignment="center"
+                    android:textColor="#eee"
+                    android:textSize="?attr/status_text_medium"
+                    tools:text="Some media description which might get quite long so that it won't easily fit in one line" />
+            </androidx.core.widget.NestedScrollView>
+        </LinearLayout>
+    </androidx.coordinatorlayout.widget.CoordinatorLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>