Merge "Move some inner static class to top class in new package"

1 files changed, 369 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
new file mode 100644
index 000000000..55427d23f
--- /dev/null
+++ b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
@@ -0,0 +1,369 @@
+/*
+ * Copyright (C) 2008 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.keyboard;
+
+import com.android.inputmethod.latin.LatinIMEUtil;
+import com.android.inputmethod.voice.VoiceIMEConnector;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.os.Handler;
+import android.os.Message;
+import android.os.SystemClock;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+
+import java.util.List;
+
+public class LatinKeyboardView extends KeyboardView {
+
+    /** Whether we've started dropping move events because we found a big jump */
+    private boolean mDroppingEvents;
+    /**
+     * Whether multi-touch disambiguation needs to be disabled if a real multi-touch event has
+     * occured
+     */
+    private boolean mDisableDisambiguation;
+    /** The distance threshold at which we start treating the touch session as a multi-touch */
+    private int mJumpThresholdSquare = Integer.MAX_VALUE;
+    /** The y coordinate of the last row */
+    private int mLastRowY;
+
+    public LatinKeyboardView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public LatinKeyboardView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    public void setPreviewEnabled(boolean previewEnabled) {
+        LatinKeyboard latinKeyboard = getLatinKeyboard();
+        if (latinKeyboard != null
+                && (latinKeyboard.isPhoneKeyboard() || latinKeyboard.isNumberKeyboard())) {
+            // Phone and number keyboard never shows popup preview (except language switch).
+            super.setPreviewEnabled(false);
+        } else {
+            super.setPreviewEnabled(previewEnabled);
+        }
+    }
+
+    public void setLatinKeyboard(LatinKeyboard k) {
+        super.setKeyboard(k);
+        // One-seventh of the keyboard width seems like a reasonable threshold
+        mJumpThresholdSquare = k.getMinWidth() / 7;
+        mJumpThresholdSquare *= mJumpThresholdSquare;
+        // Assuming there are 4 rows, this is the coordinate of the last row
+        mLastRowY = (k.getHeight() * 3) / 4;
+        setKeyboardLocal(k);
+    }
+
+    public LatinKeyboard getLatinKeyboard() {
+        Keyboard keyboard = getKeyboard();
+        if (keyboard instanceof LatinKeyboard) {
+            return (LatinKeyboard)keyboard;
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    protected boolean onLongPress(Key key) {
+        int primaryCode = key.codes[0];
+        if (primaryCode == LatinKeyboard.KEYCODE_OPTIONS) {
+            return invokeOnKey(LatinKeyboard.KEYCODE_OPTIONS_LONGPRESS);
+        } else if (primaryCode == '0' && getLatinKeyboard().isPhoneKeyboard()) {
+            // Long pressing on 0 in phone number keypad gives you a '+'.
+            return invokeOnKey('+');
+        } else {
+            return super.onLongPress(key);
+        }
+    }
+
+    private boolean invokeOnKey(int primaryCode) {
+        getOnKeyboardActionListener().onKey(primaryCode, null,
+                KeyboardView.NOT_A_TOUCH_COORDINATE,
+                KeyboardView.NOT_A_TOUCH_COORDINATE);
+        return true;
+    }
+
+    @Override
+    protected CharSequence adjustCase(CharSequence label) {
+        LatinKeyboard keyboard = getLatinKeyboard();
+        if (keyboard.isAlphaKeyboard()
+                && keyboard.isShiftedOrShiftLocked()
+                && !TextUtils.isEmpty(label) && label.length() < 3
+                && Character.isLowerCase(label.charAt(0))) {
+            label = label.toString().toUpperCase();
+        }
+        return label;
+    }
+
+    /**
+     * This function checks to see if we need to handle any sudden jumps in the pointer location
+     * that could be due to a multi-touch being treated as a move by the firmware or hardware.
+     * Once a sudden jump is detected, all subsequent move events are discarded
+     * until an UP is received.<P>
+     * When a sudden jump is detected, an UP event is simulated at the last position and when
+     * the sudden moves subside, a DOWN event is simulated for the second key.
+     * @param me the motion event
+     * @return true if the event was consumed, so that it doesn't continue to be handled by
+     * KeyboardView.
+     */
+    private boolean handleSuddenJump(MotionEvent me) {
+        final int action = me.getAction();
+        final int x = (int) me.getX();
+        final int y = (int) me.getY();
+        boolean result = false;
+
+        // Real multi-touch event? Stop looking for sudden jumps
+        if (me.getPointerCount() > 1) {
+            mDisableDisambiguation = true;
+        }
+        if (mDisableDisambiguation) {
+            // If UP, reset the multi-touch flag
+            if (action == MotionEvent.ACTION_UP) mDisableDisambiguation = false;
+            return false;
+        }
+
+        switch (action) {
+        case MotionEvent.ACTION_DOWN:
+            // Reset the "session"
+            mDroppingEvents = false;
+            mDisableDisambiguation = false;
+            break;
+        case MotionEvent.ACTION_MOVE:
+            // Is this a big jump?
+            final int distanceSquare = (mLastX - x) * (mLastX - x) + (mLastY - y) * (mLastY - y);
+            // Check the distance and also if the move is not entirely within the bottom row
+            // If it's only in the bottom row, it might be an intentional slide gesture
+            // for language switching
+            if (distanceSquare > mJumpThresholdSquare
+                    && (mLastY < mLastRowY || y < mLastRowY)) {
+                // If we're not yet dropping events, start dropping and send an UP event
+                if (!mDroppingEvents) {
+                    mDroppingEvents = true;
+                    // Send an up event
+                    MotionEvent translated = MotionEvent.obtain(me.getEventTime(), me.getEventTime(),
+                            MotionEvent.ACTION_UP,
+                            mLastX, mLastY, me.getMetaState());
+                    super.onTouchEvent(translated);
+                    translated.recycle();
+                }
+                result = true;
+            } else if (mDroppingEvents) {
+                // If moves are small and we're already dropping events, continue dropping
+                result = true;
+            }
+            break;
+        case MotionEvent.ACTION_UP:
+            if (mDroppingEvents) {
+                // Send a down event first, as we dropped a bunch of sudden jumps and assume that
+                // the user is releasing the touch on the second key.
+                MotionEvent translated = MotionEvent.obtain(me.getEventTime(), me.getEventTime(),
+                        MotionEvent.ACTION_DOWN,
+                        x, y, me.getMetaState());
+                super.onTouchEvent(translated);
+                translated.recycle();
+                mDroppingEvents = false;
+                // Let the up event get processed as well, result = false
+            }
+            break;
+        }
+        // Track the previous coordinate
+        mLastX = x;
+        mLastY = y;
+        return result;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent me) {
+        LatinKeyboard keyboard = getLatinKeyboard();
+        if (DEBUG_LINE) {
+            mLastX = (int) me.getX();
+            mLastY = (int) me.getY();
+            invalidate();
+        }
+
+        // If there was a sudden jump, return without processing the actual motion event.
+        if (handleSuddenJump(me))
+            return true;
+
+        // Reset any bounding box controls in the keyboard
+        if (me.getAction() == MotionEvent.ACTION_DOWN) {
+            keyboard.keyReleased();
+        }
+
+        if (me.getAction() == MotionEvent.ACTION_UP) {
+            int languageDirection = keyboard.getLanguageChangeDirection();
+            if (languageDirection != 0) {
+                getOnKeyboardActionListener().onKey(
+                        languageDirection == 1
+                        ? LatinKeyboard.KEYCODE_NEXT_LANGUAGE : LatinKeyboard.KEYCODE_PREV_LANGUAGE,
+                        null, mLastX, mLastY);
+                me.setAction(MotionEvent.ACTION_CANCEL);
+                keyboard.keyReleased();
+                return super.onTouchEvent(me);
+            }
+        }
+
+        return super.onTouchEvent(me);
+    }
+
+    /****************************  INSTRUMENTATION  *******************************/
+
+    public static final boolean DEBUG_AUTO_PLAY = false;
+    public static final boolean DEBUG_LINE = false;
+    private static final int MSG_TOUCH_DOWN = 1;
+    private static final int MSG_TOUCH_UP = 2;
+
+    Handler mHandler2;
+
+    private String mStringToPlay;
+    private int mStringIndex;
+    private boolean mDownDelivered;
+    private Key[] mAsciiKeys = new Key[256];
+    private boolean mPlaying;
+    private int mLastX;
+    private int mLastY;
+    private Paint mPaint;
+
+    private void setKeyboardLocal(LatinKeyboard k) {
+        if (DEBUG_AUTO_PLAY) {
+            findKeys();
+            if (mHandler2 == null) {
+                mHandler2 = new Handler() {
+                    @Override
+                    public void handleMessage(Message msg) {
+                        removeMessages(MSG_TOUCH_DOWN);
+                        removeMessages(MSG_TOUCH_UP);
+                        if (mPlaying == false) return;
+
+                        switch (msg.what) {
+                            case MSG_TOUCH_DOWN:
+                                if (mStringIndex >= mStringToPlay.length()) {
+                                    mPlaying = false;
+                                    return;
+                                }
+                                char c = mStringToPlay.charAt(mStringIndex);
+                                while (c > 255 || mAsciiKeys[c] == null) {
+                                    mStringIndex++;
+                                    if (mStringIndex >= mStringToPlay.length()) {
+                                        mPlaying = false;
+                                        return;
+                                    }
+                                    c = mStringToPlay.charAt(mStringIndex);
+                                }
+                                int x = mAsciiKeys[c].x + 10;
+                                int y = mAsciiKeys[c].y + 26;
+                                MotionEvent me = MotionEvent.obtain(SystemClock.uptimeMillis(),
+                                        SystemClock.uptimeMillis(),
+                                        MotionEvent.ACTION_DOWN, x, y, 0);
+                                LatinKeyboardView.this.dispatchTouchEvent(me);
+                                me.recycle();
+                                sendEmptyMessageDelayed(MSG_TOUCH_UP, 500); // Deliver up in 500ms if nothing else
+                                // happens
+                                mDownDelivered = true;
+                                break;
+                            case MSG_TOUCH_UP:
+                                char cUp = mStringToPlay.charAt(mStringIndex);
+                                int x2 = mAsciiKeys[cUp].x + 10;
+                                int y2 = mAsciiKeys[cUp].y + 26;
+                                mStringIndex++;
+
+                                MotionEvent me2 = MotionEvent.obtain(SystemClock.uptimeMillis(),
+                                        SystemClock.uptimeMillis(),
+                                        MotionEvent.ACTION_UP, x2, y2, 0);
+                                LatinKeyboardView.this.dispatchTouchEvent(me2);
+                                me2.recycle();
+                                sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 500); // Deliver up in 500ms if nothing else
+                                // happens
+                                mDownDelivered = false;
+                                break;
+                        }
+                    }
+                };
+
+            }
+        }
+    }
+
+    private void findKeys() {
+        List<Key> keys = getLatinKeyboard().getKeys();
+        // Get the keys on this keyboard
+        for (int i = 0; i < keys.size(); i++) {
+            int code = keys.get(i).codes[0];
+            if (code >= 0 && code <= 255) {
+                mAsciiKeys[code] = keys.get(i);
+            }
+        }
+    }
+
+    public void startPlaying(String s) {
+        if (DEBUG_AUTO_PLAY) {
+            if (s == null) return;
+            mStringToPlay = s.toLowerCase();
+            mPlaying = true;
+            mDownDelivered = false;
+            mStringIndex = 0;
+            mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 10);
+        }
+    }
+
+    @Override
+    public void draw(Canvas c) {
+        LatinIMEUtil.GCUtils.getInstance().reset();
+        boolean tryGC = true;
+        for (int i = 0; i < LatinIMEUtil.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
+            try {
+                super.draw(c);
+                tryGC = false;
+            } catch (OutOfMemoryError e) {
+                tryGC = LatinIMEUtil.GCUtils.getInstance().tryGCOrWait("LatinKeyboardView", e);
+            }
+        }
+        if (DEBUG_AUTO_PLAY) {
+            if (mPlaying) {
+                mHandler2.removeMessages(MSG_TOUCH_DOWN);
+                mHandler2.removeMessages(MSG_TOUCH_UP);
+                if (mDownDelivered) {
+                    mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_UP, 20);
+                } else {
+                    mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 20);
+                }
+            }
+        }
+        if (DEBUG_LINE) {
+            if (mPaint == null) {
+                mPaint = new Paint();
+                mPaint.setColor(0x80FFFFFF);
+                mPaint.setAntiAlias(false);
+            }
+            c.drawLine(mLastX, 0, mLastX, getHeight(), mPaint);
+            c.drawLine(0, mLastY, getWidth(), mLastY, mPaint);
+        }
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        // Token is available from here.
+        VoiceIMEConnector.getInstance().onAttachedToWindow();
+    }
+}