[Android] Marquee effect for long names in directory browser.

[Shivansh Saini]

vlc-android | branch: master | Shivansh Saini <shivanshs9 at gmail.com> | Mon Apr 29 15:20:44 2019 +0530| [7b3b0830677010914d46b71558fbe7eb3c45f2af] | committer: Geoffrey Métais

Marquee effect for long names in directory browser.

> https://code.videolan.org/videolan/vlc-android/commit/7b3b0830677010914d46b71558fbe7eb3c45f2af
---

 vlc-android/res/layout/browser_item.xml            |  5 ++--
 .../videolan/vlc/gui/browser/BaseBrowserAdapter.kt | 28 ++++++++++++++++++++++
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/vlc-android/res/layout/browser_item.xml b/vlc-android/res/layout/browser_item.xml
index 53a301718..37ef8ff4a 100644
--- a/vlc-android/res/layout/browser_item.xml
+++ b/vlc-android/res/layout/browser_item.xml
@@ -104,9 +104,10 @@
             android:layout_height="wrap_content"
             android:layout_marginStart="@dimen/default_margin"
             android:layout_marginLeft="@dimen/default_margin"
-            android:ellipsize="end"
+            android:ellipsize="marquee"
+            android:marqueeRepeatLimit="1"
+            android:scrollHorizontally="true"
             android:lineSpacingMultiplier="1.1"
-            android:maxLines="1"
             android:singleLine="true"
             android:text="@{filename ?? item.title}"
             android:textColor="?attr/list_title"
diff --git a/vlc-android/src/org/videolan/vlc/gui/browser/BaseBrowserAdapter.kt b/vlc-android/src/org/videolan/vlc/gui/browser/BaseBrowserAdapter.kt
index 8e37740ee..487dae2b2 100644
--- a/vlc-android/src/org/videolan/vlc/gui/browser/BaseBrowserAdapter.kt
+++ b/vlc-android/src/org/videolan/vlc/gui/browser/BaseBrowserAdapter.kt
@@ -30,6 +30,8 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.databinding.ViewDataBinding
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.ObsoleteCoroutinesApi
 import org.videolan.libvlc.util.AndroidUtil
@@ -104,6 +106,32 @@ open class BaseBrowserAdapter() : DiffUtilAdapter<MediaLibraryItem, BaseBrowserA
             SeparatorViewHolder(BrowserItemSeparatorBinding.inflate(inflater, parent, false)) as ViewHolder<ViewDataBinding>
     }
 
+    override fun onAttachedToRecyclerView(recyclerView: RecyclerView) {
+        super.onAttachedToRecyclerView(recyclerView)
+
+        val layoutManager = recyclerView.layoutManager
+        if (layoutManager is LinearLayoutManager) {
+            recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+                override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+                    super.onScrollStateChanged(recyclerView, newState)
+
+                    val doScroll = newState == RecyclerView.SCROLL_STATE_IDLE
+
+                    val firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition()
+                    val lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition()
+                    for (i in firstVisibleItemPosition..lastVisibleItemPosition) {
+                        val holder = recyclerView.findViewHolderForLayoutPosition(i)
+                        if (holder is MediaViewHolder) {
+                            // Show marquee effect only for those view holders which are visible.
+                            // If not visible or dragging scroll state, then stop the marquee effect.
+                            holder.binding.title.isSelected = doScroll
+                        }
+                    }
+                }
+            })
+        }
+    }
+
     override fun onBindViewHolder(holder: ViewHolder<ViewDataBinding>, position: Int) {
         val viewType = getItemViewType(position)
         if (viewType == TYPE_MEDIA) {