Implemented typo recognition in Chrome for Android.

chrome/android/java/src/org/chromium/chrome/browser/spellchecker/SpellCheckerSessionBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/spellchecker/SpellCheckerSessionBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/spellchecker/SpellCheckerSessionBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/spellchecker/SpellCheckerSessionBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..337cf0a33a184a9c374576748bf427687d988f51
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/spellchecker/SpellCheckerSessionBridge.java
@@ -0,0 +1,93 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.spellchecker;
+
+import android.content.Context;
+import android.view.textservice.SentenceSuggestionsInfo;
+import android.view.textservice.SpellCheckerSession;
+import android.view.textservice.SuggestionsInfo;
+import android.view.textservice.TextInfo;
+import android.view.textservice.TextServicesManager;
+
+import org.chromium.base.ApplicationStatus;
+import org.chromium.base.annotations.CalledByNative;
+
+import java.util.ArrayList;
+import java.util.Locale;
+
+/**
+* JNI interface for spellcheck_platform_android to use Android's spellchecker.
+*/
+public class SpellCheckerSessionBridge implements SpellCheckerSession.SpellCheckerSessionListener {
+
+    private boolean mReady;
+    private SpellCheckerSession mSpellCheckerSession;
+    private final long mNativeSpellCheckMessageFilterPlatform;
+    private String mText;
+
+    public SpellCheckerSessionBridge(long nativeSpellCheckMessageFilterPlatform) {
+        mNativeSpellCheckMessageFilterPlatform = nativeSpellCheckMessageFilterPlatform;
+        mReady = true;
+        Context context = ApplicationStatus.getApplicationContext();
+        final TextServicesManager textServicesManager =
+                (TextServicesManager) context.getSystemService(
+                Context.TEXT_SERVICES_MANAGER_SERVICE);
+        mSpellCheckerSession = textServicesManager.newSpellCheckerSession(null,
+                Locale.ENGLISH, SpellCheckerSessionBridge.this, true);
+    }
+
+    @CalledByNative
+    private static SpellCheckerSessionBridge create(long nativeSpellCheckMessageFilterPlatform) {
+        return new SpellCheckerSessionBridge(nativeSpellCheckMessageFilterPlatform);
+    }
+
+    @CalledByNative
+    private void checkSpelling(String text) {
+        if (!mReady) { // The listener can't handle multiple events in rapid sequence
+            return;
+        }
+        mReady = false;
+        mText = text;
+        mSpellCheckerSession.getSentenceSuggestions(new TextInfo[]{ new TextInfo(text)}, 5);
+    }
+
+    @Override
+    public void onGetSentenceSuggestions(SentenceSuggestionsInfo[] results) {
+        ArrayList<Integer> offsets = new ArrayList<Integer>();
+        ArrayList<Integer> lengths = new ArrayList<Integer>();
+
+        for (SentenceSuggestionsInfo result: results) {
+            for (int i = 0; i < result.getSuggestionsCount(); i++) {
+                SuggestionsInfo currentSuggestion = result.getSuggestionsInfoAt(i);
+                boolean isWordCorrect = (currentSuggestion.getSuggestionsAttributes()
+                        & SuggestionsInfo.RESULT_ATTR_LOOKS_LIKE_TYPO) == 0;
+                if (!isWordCorrect) {
+                    offsets.add(result.getOffsetAt(i));
+                    lengths.add(result.getLengthAt(i));
+                }
+            }
+        }
+
+        nativeGetSpellcheckInfo(mNativeSpellCheckMessageFilterPlatform,
+                mText, convertListToArray(offsets), convertListToArray(lengths));
+        mReady = true;
+    }
+
+    private int[] convertListToArray(ArrayList<Integer> toConvert) {
+        int[] toReturn = new int[toConvert.size()];
+        int index = 0;
+        for (Integer number : toConvert) {
+            toReturn[index++] = number.intValue();
+        }
+        return toReturn;
+    }
+
+    @Override
+    public void onGetSuggestions(SuggestionsInfo[] results) {
+    }
+
+    private native void nativeGetSpellcheckInfo(long nativeSpellCheckMessageFilterPlatform,
+            String text, int[] offsets, int[] lengths);
+}