Add spellcheck and word suggestion to the prediction service

third_party/android_prediction/suggest/core/policy/weighting.h

Index: third_party/android_prediction/suggest/core/policy/weighting.h
diff --git a/third_party/android_prediction/suggest/core/policy/weighting.h b/third_party/android_prediction/suggest/core/policy/weighting.h
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+++ b/third_party/android_prediction/suggest/core/policy/weighting.h
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+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef LATINIME_WEIGHTING_H
+#define LATINIME_WEIGHTING_H
+
+#include "third_party/android_prediction/defines.h"
+#include "third_party/android_prediction/suggest/core/dictionary/error_type_utils.h"
+
+namespace latinime {
+
+class DicNode;
+class DicTraverseSession;
+struct DicNode_InputStateG;
+class MultiBigramMap;
+
+class Weighting {
+ public:
+    static void addCostAndForwardInputIndex(const Weighting *const weighting,
+            const CorrectionType correctionType,
+            const DicTraverseSession *const traverseSession,
+            const DicNode *const parentDicNode, DicNode *const dicNode,
+            MultiBigramMap *const multiBigramMap);
+
+ protected:
+    virtual float getTerminalSpatialCost(const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode) const = 0;
+
+    virtual float getOmissionCost(
+         const DicNode *const parentDicNode, const DicNode *const dicNode) const = 0;
+
+    virtual float getMatchedCost(
+            const DicTraverseSession *const traverseSession, const DicNode *const dicNode,
+            DicNode_InputStateG *inputStateG) const = 0;
+
+    virtual bool isProximityDicNode(const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode) const = 0;
+
+    virtual float getTranspositionCost(
+            const DicTraverseSession *const traverseSession, const DicNode *const parentDicNode,
+            const DicNode *const dicNode) const = 0;
+
+    virtual float getInsertionCost(
+            const DicTraverseSession *const traverseSession,
+            const DicNode *const parentDicNode, const DicNode *const dicNode) const = 0;
+
+    virtual float getNewWordSpatialCost(const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode, DicNode_InputStateG *const inputStateG) const = 0;
+
+    virtual float getNewWordBigramLanguageCost(
+            const DicTraverseSession *const traverseSession, const DicNode *const dicNode,
+            MultiBigramMap *const multiBigramMap) const = 0;
+
+    virtual float getCompletionCost(
+            const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode) const = 0;
+
+    virtual float getTerminalInsertionCost(
+            const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode) const = 0;
+
+    virtual float getTerminalLanguageCost(
+            const DicTraverseSession *const traverseSession, const DicNode *const dicNode,
+            float dicNodeLanguageImprobability) const = 0;
+
+    virtual bool needsToNormalizeCompoundDistance() const = 0;
+
+    virtual float getAdditionalProximityCost() const = 0;
+
+    virtual float getSubstitutionCost() const = 0;
+
+    virtual float getSpaceSubstitutionCost(const DicTraverseSession *const traverseSession,
+            const DicNode *const dicNode) const = 0;
+
+    virtual ErrorTypeUtils::ErrorType getErrorType(const CorrectionType correctionType,
+            const DicTraverseSession *const traverseSession,
+            const DicNode *const parentDicNode, const DicNode *const dicNode) const = 0;
+
+    Weighting() {}
+    virtual ~Weighting() {}
+
+ private:
+    DISALLOW_COPY_AND_ASSIGN(Weighting);
+
+    static float getSpatialCost(const Weighting *const weighting,
+            const CorrectionType correctionType, const DicTraverseSession *const traverseSession,
+            const DicNode *const parentDicNode, const DicNode *const dicNode,
+            DicNode_InputStateG *const inputStateG);
+    static float getLanguageCost(const Weighting *const weighting,
+            const CorrectionType correctionType, const DicTraverseSession *const traverseSession,
+            const DicNode *const parentDicNode, const DicNode *const dicNode,
+            MultiBigramMap *const multiBigramMap);
+    // TODO: Move to TypingWeighting and GestureWeighting?
+    static int getForwardInputCount(const CorrectionType correctionType);
+};
+} // namespace latinime
+#endif // LATINIME_WEIGHTING_H