Add processing for French ligatures.

Bug: 5140033
Change-Id: I1c2751fc617e662aad9f67506e28a622f81d0bc9

java/res/values-fr/donottranslate-config.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2012, 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.
+*/
+-->
+
+<resources>
+    <bool name="config_require_ligatures_processing">true</bool>
+</resources>

java/res/values/donottranslate-config.xml

@@ -20,4 +20,5 @@
 
 <resources>
     <bool name="config_require_umlaut_processing">false</bool>
+    <bool name="config_require_ligatures_processing">false</bool>
 </resources>

java/src/com/android/inputmethod/latin/BinaryDictionary.java

@@ -55,6 +55,8 @@ public class BinaryDictionary extends Dictionary {
 
     public static final Flag FLAG_REQUIRES_GERMAN_UMLAUT_PROCESSING =
             new Flag(R.bool.config_require_umlaut_processing, 0x1);
+    public static final Flag FLAG_REQUIRES_FRENCH_LIGATURES_PROCESSING =
+            new Flag(R.bool.config_require_ligatures_processing, 0x4);
 
     // FULL_EDIT_DISTANCE is a flag that forces the dictionary to use full words
     // when computing edit distance, instead of the default behavior of stopping
@@ -77,6 +79,7 @@ public class BinaryDictionary extends Dictionary {
         // actual value will be read from the configuration/extra value at run time for
         // the configuration at dictionary creation time.
         FLAG_REQUIRES_GERMAN_UMLAUT_PROCESSING,
+        FLAG_REQUIRES_FRENCH_LIGATURES_PROCESSING,
     };
 
     private int mFlags = 0;

native/src/unigram_dictionary.cpp

@@ -34,6 +34,10 @@ const UnigramDictionary::digraph_t UnigramDictionary::GERMAN_UMLAUT_DIGRAPHS[] =
         { 'o', 'e', 0x00F6 }, // U+00F6 : LATIN SMALL LETTER O WITH DIAERESIS
         { 'u', 'e', 0x00FC } }; // U+00FC : LATIN SMALL LETTER U WITH DIAERESIS
 
+const UnigramDictionary::digraph_t UnigramDictionary::FRENCH_LIGATURES_DIGRAPHS[] =
+        { { 'a', 'e', 0x00E6 }, // U+00E6 : LATIN SMALL LETTER AE
+        { 'o', 'e', 0x0153 } }; // U+0153 : LATIN SMALL LIGATURE OE
+
 // TODO: check the header
 UnigramDictionary::UnigramDictionary(const uint8_t* const streamStart, int typedLetterMultiplier,
         int fullWordMultiplier, int maxWordLength, int maxWords, int maxProximityChars,
@@ -181,6 +185,15 @@ int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo,
                 codesSize, flags, codes, codesSize, 0, codesBuffer, masterCorrection, queuePool,
                 GERMAN_UMLAUT_DIGRAPHS,
                 sizeof(GERMAN_UMLAUT_DIGRAPHS) / sizeof(GERMAN_UMLAUT_DIGRAPHS[0]));
+    } else if (REQUIRES_FRENCH_LIGATURES_PROCESSING & flags) {
+        int codesBuffer[getCodesBufferSize(codes, codesSize, MAX_PROXIMITY_CHARS)];
+        int xCoordinatesBuffer[codesSize];
+        int yCoordinatesBuffer[codesSize];
+        getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates, codesBuffer,
+                xCoordinatesBuffer, yCoordinatesBuffer,
+                codesSize, flags, codes, codesSize, 0, codesBuffer, masterCorrection, queuePool,
+                FRENCH_LIGATURES_DIGRAPHS,
+                sizeof(FRENCH_LIGATURES_DIGRAPHS) / sizeof(FRENCH_LIGATURES_DIGRAPHS[0]));
     } else { // Normal processing
         getWordSuggestions(proximityInfo, xcoordinates, ycoordinates, codes, codesSize, flags,
                 masterCorrection, queuePool);

native/src/unigram_dictionary.h

@@ -157,9 +157,11 @@ class UnigramDictionary {
     // Please update both at the same time.
     enum {
         REQUIRES_GERMAN_UMLAUT_PROCESSING = 0x1,
-        USE_FULL_EDIT_DISTANCE = 0x2
+        USE_FULL_EDIT_DISTANCE = 0x2,
+        REQUIRES_FRENCH_LIGATURES_PROCESSING = 0x4
     };
     static const digraph_t GERMAN_UMLAUT_DIGRAPHS[];
+    static const digraph_t FRENCH_LIGATURES_DIGRAPHS[];
 
     // Still bundled members
     unsigned short mWord[MAX_WORD_LENGTH_INTERNAL];// TODO: remove