Remove logic related to dictionary loading from LatinIME.

Make mSuggest final and give DictionaryFacilitator the
responsibility to manage dictionary loading state.
This can simplify the logic to decide how to deal with
additional dictionaries when loading settings or language
switching.

Bug: 13273534
Change-Id: I9f3d328272f25addfa186fbeedaaf8417455ba99

1 files changed, 76 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/utils/SuggestionResults.java b/java/src/com/android/inputmethod/latin/utils/SuggestionResults.java
new file mode 100644
index 000000000..0b362c48a
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/utils/SuggestionResults.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.utils;
+
+import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
+
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.Locale;
+import java.util.TreeSet;
+
+/**
+ * A TreeSet of SuggestedWordInfo that is bounded in size and throws everything that's smaller
+ * than its limit
+ */
+public final class SuggestionResults extends TreeSet<SuggestedWordInfo> {
+    public final Locale mLocale;
+    private final int mCapacity;
+
+    public SuggestionResults(final Locale locale, final int capacity) {
+        this(locale, sSuggestedWordInfoComparator, capacity);
+    }
+
+    public SuggestionResults(final Locale locale, final Comparator<SuggestedWordInfo> comparator,
+            final int capacity) {
+        super(comparator);
+        mLocale = locale;
+        mCapacity = capacity;
+    }
+
+    @Override
+    public boolean add(final SuggestedWordInfo e) {
+        if (size() < mCapacity) return super.add(e);
+        if (comparator().compare(e, last()) > 0) return false;
+        super.add(e);
+        pollLast(); // removes the last element
+        return true;
+    }
+
+    @Override
+    public boolean addAll(final Collection<? extends SuggestedWordInfo> e) {
+        if (null == e) return false;
+        return super.addAll(e);
+    }
+
+    private static final class SuggestedWordInfoComparator
+            implements Comparator<SuggestedWordInfo> {
+        // This comparator ranks the word info with the higher frequency first. That's because
+        // that's the order we want our elements in.
+        @Override
+        public int compare(final SuggestedWordInfo o1, final SuggestedWordInfo o2) {
+            if (o1.mScore > o2.mScore) return -1;
+            if (o1.mScore < o2.mScore) return 1;
+            if (o1.mCodePointCount < o2.mCodePointCount) return -1;
+            if (o1.mCodePointCount > o2.mCodePointCount) return 1;
+            return o1.mWord.compareTo(o2.mWord);
+        }
+    }
+
+    private static final SuggestedWordInfoComparator sSuggestedWordInfoComparator =
+            new SuggestedWordInfoComparator();
+}