Rename to Kelar Keyboard (org.kelar.inputmethod.latin)

1 files changed, 81 insertions, 0 deletions

diff --git a/java/src/org/kelar/inputmethod/event/HardwareKeyboardEventDecoder.java b/java/src/org/kelar/inputmethod/event/HardwareKeyboardEventDecoder.java
new file mode 100644
index 000000000..c8cfbc2cc
--- /dev/null
+++ b/java/src/org/kelar/inputmethod/event/HardwareKeyboardEventDecoder.java
@@ -0,0 +1,81 @@
+/*
+ * 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 org.kelar.inputmethod.event;
+
+import android.view.KeyCharacterMap;
+import android.view.KeyEvent;
+
+import org.kelar.inputmethod.latin.common.Constants;
+
+/**
+ * A hardware event decoder for a hardware qwerty-ish keyboard.
+ *
+ * The events are always hardware keypresses, but they can be key down or key up events, they
+ * can be dead keys, they can be meta keys like shift or ctrl... This does not deal with
+ * 10-key like keyboards; a different decoder is used for this.
+ */
+public class HardwareKeyboardEventDecoder implements HardwareEventDecoder {
+    final int mDeviceId;
+
+    public HardwareKeyboardEventDecoder(final int deviceId) {
+        mDeviceId = deviceId;
+        // TODO: get the layout for this hardware keyboard
+    }
+
+    @Override
+    public Event decodeHardwareKey(final KeyEvent keyEvent) {
+        // KeyEvent#getUnicodeChar() does not exactly returns a unicode char, but rather a value
+        // that includes both the unicode char in the lower 21 bits and flags in the upper bits,
+        // hence the name "codePointAndFlags". {@see KeyEvent#getUnicodeChar()} for more info.
+        final int codePointAndFlags = keyEvent.getUnicodeChar();
+        // The keyCode is the abstraction used by the KeyEvent to represent different keys that
+        // do not necessarily map to a unicode character. This represents a physical key, like
+        // the key for 'A' or Space, but also Backspace or Ctrl or Caps Lock.
+        final int keyCode = keyEvent.getKeyCode();
+        final boolean isKeyRepeat = (0 != keyEvent.getRepeatCount());
+        if (KeyEvent.KEYCODE_DEL == keyCode) {
+            return Event.createHardwareKeypressEvent(Event.NOT_A_CODE_POINT, Constants.CODE_DELETE,
+                    null /* next */, isKeyRepeat);
+        }
+        if (keyEvent.isPrintingKey() || KeyEvent.KEYCODE_SPACE == keyCode
+                || KeyEvent.KEYCODE_ENTER == keyCode) {
+            if (0 != (codePointAndFlags & KeyCharacterMap.COMBINING_ACCENT)) {
+                // A dead key.
+                return Event.createDeadEvent(
+                        codePointAndFlags & KeyCharacterMap.COMBINING_ACCENT_MASK, keyCode,
+                        null /* next */);
+            }
+            if (KeyEvent.KEYCODE_ENTER == keyCode) {
+                // The Enter key. If the Shift key is not being pressed, this should send a
+                // CODE_ENTER to trigger the action if any, or a carriage return otherwise. If the
+                // Shift key is being pressed, this should send a CODE_SHIFT_ENTER and let
+                // Latin IME decide what to do with it.
+                if (keyEvent.isShiftPressed()) {
+                    return Event.createHardwareKeypressEvent(Event.NOT_A_CODE_POINT,
+                            Constants.CODE_SHIFT_ENTER, null /* next */, isKeyRepeat);
+                }
+                return Event.createHardwareKeypressEvent(Constants.CODE_ENTER, keyCode,
+                        null /* next */, isKeyRepeat);
+            }
+            // If not Enter, then this is just a regular keypress event for a normal character
+            // that can be committed right away, taking into account the current state.
+            return Event.createHardwareKeypressEvent(codePointAndFlags, keyCode, null /* next */,
+                    isKeyRepeat);
+        }
+        return Event.createNotHandledEvent();
+    }
+}