[PB5] Store state in a more convenient manner

This is more readable and will help with animations going forward.

Bug: 7600384
Change-Id: I255598d860d1e451fef106b00da63c282fe95f95

1 files changed, 38 insertions, 1 deletions

diff --git a/java/src/com/android/inputmethod/dictionarypack/DictionaryListInterfaceState.java b/java/src/com/android/inputmethod/dictionarypack/DictionaryListInterfaceState.java
index cbf0476a3..8975d69a8 100644
--- a/java/src/com/android/inputmethod/dictionarypack/DictionaryListInterfaceState.java
+++ b/java/src/com/android/inputmethod/dictionarypack/DictionaryListInterfaceState.java
@@ -16,9 +16,46 @@
 
 package com.android.inputmethod.dictionarypack;
 
+import com.android.inputmethod.latin.CollectionUtils;
+
+import java.util.HashMap;
+
 /**
  * Helper class to maintain the interface state of word list preferences.
+ *
+ * This is necessary because the views are created on-demand by calling code. There are many
+ * situations where views are renewed with little relation with user interaction. For example,
+ * when scrolling, the view is reused so it doesn't keep its state, which means we need to keep
+ * it separately. Also whenever the underlying dictionary list undergoes a change (for example,
+ * update the metadata, or finish downloading) the whole list has to be thrown out and recreated
+ * in case some dictionaries appeared, disappeared, changed states etc.
  */
 public class DictionaryListInterfaceState {
-    public String mLastClickedId = null;
+    private static class State {
+        public boolean mOpen = false;
+        public int mStatus = MetadataDbHelper.STATUS_UNKNOWN;
+    }
+
+    private HashMap<String, State> mWordlistToState = CollectionUtils.newHashMap();
+
+    public boolean isOpen(final String wordlistId) {
+        final State state = mWordlistToState.get(wordlistId);
+        if (null == state) return false;
+        return state.mOpen;
+    }
+
+    public void setOpen(final String wordlistId, final int status) {
+        final State newState;
+        final State state = mWordlistToState.get(wordlistId);
+        newState = null == state ? new State() : state;
+        newState.mOpen = true;
+        newState.mStatus = status;
+        mWordlistToState.put(wordlistId, newState);
+    }
+
+    public void closeAll() {
+        for (final State state : mWordlistToState.values()) {
+            state.mOpen = false;
+        }
+    }
 }