[CB08] Create a combiner chain in the word composer.

Bug: 13406701
Change-Id: I3b9f75de9283f76366d1bef7e14a8f22f2186669

3 files changed, 54 insertions, 84 deletions

diff --git a/java/src/com/android/inputmethod/event/CombinerChain.java b/java/src/com/android/inputmethod/event/CombinerChain.java
new file mode 100644
index 000000000..1deaed68f
--- /dev/null
+++ b/java/src/com/android/inputmethod/event/CombinerChain.java
@@ -0,0 +1,54 @@
+/*
+ * 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.event;
+
+import com.android.inputmethod.latin.utils.CollectionUtils;
+
+import java.util.ArrayList;
+
+/**
+ * This class implements the logic chain between receiving events and generating code points.
+ *
+ * Event sources are multiple. It may be a hardware keyboard, a D-PAD, a software keyboard,
+ * or any exotic input source.
+ * This class will orchestrate the composing chain that starts with an event as its input. Each
+ * composer will be given turns one after the other.
+ * The output is composed of two sequences of code points: the first, representing the already
+ * finished combining part, will be shown normally as the composing string, while the second is
+ * feedback on the composing state and will typically be shown with different styling such as
+ * a colored background.
+ */
+public class CombinerChain {
+    // TODO: Create an object type to represent input material + visual feedback + decoding state
+
+    private final ArrayList<Combiner> mCombiners;
+
+    /**
+     * Create an combiner chain.
+     *
+     * The combiner chain takes events as inputs and outputs code points and combining state.
+     * For example, if the input language is Japanese, the combining chain will typically perform
+     * kana conversion.
+     *
+     * @param combinerList A list of combiners to be applied in order.
+     */
+    public CombinerChain(final Combiner... combinerList) {
+        mCombiners = CollectionUtils.newArrayList();
+        // The dead key combiner is always active, and always first
+        mCombiners.add(new DeadKeyCombiner());
+    }
+}
diff --git a/java/src/com/android/inputmethod/event/EventDecoderSpec.java b/java/src/com/android/inputmethod/event/EventDecoderSpec.java
deleted file mode 100644
index 303b4b4c9..000000000
--- a/java/src/com/android/inputmethod/event/EventDecoderSpec.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) 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.
- */
-
-package com.android.inputmethod.event;
-
-/**
- * Class describing a decoder chain. This will depend on the language and the input medium (soft
- * or hard keyboard for example).
- */
-public class EventDecoderSpec {
-    public EventDecoderSpec() {
-    }
-}
diff --git a/java/src/com/android/inputmethod/event/EventInterpreter.java b/java/src/com/android/inputmethod/event/EventInterpreter.java
deleted file mode 100644
index bcf10fc58..000000000
--- a/java/src/com/android/inputmethod/event/EventInterpreter.java
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright (C) 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.
- */
-
-package com.android.inputmethod.event;
-
-import com.android.inputmethod.latin.utils.CollectionUtils;
-
-import java.util.ArrayList;
-
-/**
- * This class implements the logic between receiving events and generating code points.
- *
- * Event sources are multiple. It may be a hardware keyboard, a D-PAD, a software keyboard,
- * or any exotic input source.
- * This class will orchestrate the decoding chain that starts with an event and ends up with
- * a stream of code points + decoding state.
- */
-public class EventInterpreter {
-    // TODO: Implement an object pool for events, as we'll create a lot of them
-    // TODO: Create a combiner
-    // TODO: Create an object type to represent input material + visual feedback + decoding state
-
-    private final EventDecoderSpec mDecoderSpec;
-    private final ArrayList<Combiner> mCombiners;
-
-    /**
-     * Create an event interpreter according to a specification.
-     *
-     * The specification contains information about what to do with events. Typically, it will
-     * contain information about the type of keyboards - for example, if hardware keyboard(s) is/are
-     * attached, their type will be included here so that the decoder knows what to do with each
-     * keypress (a 10-key keyboard is not handled like a qwerty-ish keyboard).
-     * It also contains information for combining characters. For example, if the input language
-     * is Japanese, the specification will typically request kana conversion.
-     * Also note that the specification can be null. This means that we need to create a default
-     * interpreter that does no specific combining, and assumes the most common cases.
-     *
-     * @param specification the specification for event interpretation. null for default.
-     */
-    public EventInterpreter(final EventDecoderSpec specification) {
-        mDecoderSpec = null != specification ? specification : new EventDecoderSpec();
-        mCombiners = CollectionUtils.newArrayList();
-        mCombiners.add(new DeadKeyCombiner());
-    }
-}