LatinIME/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

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/*
* Copyright (C) 2011 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 android.animation.Animator;
import android.animation.AnimatorInflater;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.inputmethod.InputMethodSubtype;
import android.widget.TextView;
import com.android.inputmethod.accessibility.AccessibilityUtils;
import com.android.inputmethod.accessibility.AccessibleKeyboardViewProxy;
import com.android.inputmethod.annotations.ExternallyReferenced;
import com.android.inputmethod.keyboard.internal.DrawingHandler;
import com.android.inputmethod.keyboard.internal.GestureFloatingPreviewText;
import com.android.inputmethod.keyboard.internal.GestureTrailsPreview;
import com.android.inputmethod.keyboard.internal.KeyDrawParams;
import com.android.inputmethod.keyboard.internal.KeyPreviewDrawParams;
import com.android.inputmethod.keyboard.internal.NonDistinctMultitouchHelper;
import com.android.inputmethod.keyboard.internal.PreviewPlacerView;
import com.android.inputmethod.keyboard.internal.SlidingKeyInputPreview;
import com.android.inputmethod.keyboard.internal.TimerHandler;
import com.android.inputmethod.latin.Constants;
import com.android.inputmethod.latin.LatinImeLogger;
import com.android.inputmethod.latin.R;
import com.android.inputmethod.latin.SuggestedWords;
import com.android.inputmethod.latin.define.ProductionFlag;
import com.android.inputmethod.latin.settings.DebugSettings;
import com.android.inputmethod.latin.utils.CollectionUtils;
import com.android.inputmethod.latin.utils.CoordinateUtils;
import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
import com.android.inputmethod.latin.utils.TypefaceUtils;
import com.android.inputmethod.latin.utils.UsabilityStudyLogUtils;
import com.android.inputmethod.latin.utils.ViewLayoutUtils;
import com.android.inputmethod.research.ResearchLogger;
import java.util.ArrayDeque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.WeakHashMap;
/**
* A view that is responsible for detecting key presses and touch movements.
*
* @attr ref R.styleable#MainKeyboardView_autoCorrectionSpacebarLedEnabled
* @attr ref R.styleable#MainKeyboardView_autoCorrectionSpacebarLedIcon
* @attr ref R.styleable#MainKeyboardView_languageOnSpacebarTextRatio
* @attr ref R.styleable#MainKeyboardView_languageOnSpacebarTextColor
* @attr ref R.styleable#MainKeyboardView_languageOnSpacebarTextShadowColor
* @attr ref R.styleable#MainKeyboardView_spacebarBackground
* @attr ref R.styleable#MainKeyboardView_languageOnSpacebarFinalAlpha
* @attr ref R.styleable#MainKeyboardView_languageOnSpacebarFadeoutAnimator
* @attr ref R.styleable#MainKeyboardView_altCodeKeyWhileTypingFadeoutAnimator
* @attr ref R.styleable#MainKeyboardView_altCodeKeyWhileTypingFadeinAnimator
* @attr ref R.styleable#MainKeyboardView_keyHysteresisDistance
* @attr ref R.styleable#MainKeyboardView_touchNoiseThresholdTime
* @attr ref R.styleable#MainKeyboardView_touchNoiseThresholdDistance
* @attr ref R.styleable#MainKeyboardView_keySelectionByDraggingFinger
* @attr ref R.styleable#MainKeyboardView_keyRepeatStartTimeout
* @attr ref R.styleable#MainKeyboardView_keyRepeatInterval
* @attr ref R.styleable#MainKeyboardView_longPressKeyTimeout
* @attr ref R.styleable#MainKeyboardView_longPressShiftKeyTimeout
* @attr ref R.styleable#MainKeyboardView_ignoreAltCodeKeyTimeout
* @attr ref R.styleable#MainKeyboardView_keyPreviewLayout
* @attr ref R.styleable#MainKeyboardView_keyPreviewOffset
* @attr ref R.styleable#MainKeyboardView_keyPreviewHeight
* @attr ref R.styleable#MainKeyboardView_keyPreviewLingerTimeout
* @attr ref R.styleable#MainKeyboardView_moreKeysKeyboardLayout
* @attr ref R.styleable#MainKeyboardView_backgroundDimAlpha
* @attr ref R.styleable#MainKeyboardView_showMoreKeysKeyboardAtTouchPoint
* @attr ref R.styleable#MainKeyboardView_gestureFloatingPreviewTextLingerTimeout
* @attr ref R.styleable#MainKeyboardView_gestureStaticTimeThresholdAfterFastTyping
* @attr ref R.styleable#MainKeyboardView_gestureDetectFastMoveSpeedThreshold
* @attr ref R.styleable#MainKeyboardView_gestureDynamicThresholdDecayDuration
* @attr ref R.styleable#MainKeyboardView_gestureDynamicTimeThresholdFrom
* @attr ref R.styleable#MainKeyboardView_gestureDynamicTimeThresholdTo
* @attr ref R.styleable#MainKeyboardView_gestureDynamicDistanceThresholdFrom
* @attr ref R.styleable#MainKeyboardView_gestureDynamicDistanceThresholdTo
* @attr ref R.styleable#MainKeyboardView_gestureSamplingMinimumDistance
* @attr ref R.styleable#MainKeyboardView_gestureRecognitionMinimumTime
* @attr ref R.styleable#MainKeyboardView_gestureRecognitionSpeedThreshold
* @attr ref R.styleable#MainKeyboardView_suppressKeyPreviewAfterBatchInputDuration
*/
public final class MainKeyboardView extends KeyboardView implements PointerTracker.DrawingProxy,
MoreKeysPanel.Controller, DrawingHandler.Callbacks, TimerHandler.Callbacks {
private static final String TAG = MainKeyboardView.class.getSimpleName();
/** Listener for {@link KeyboardActionListener}. */
private KeyboardActionListener mKeyboardActionListener;
/* Space key and its icon and background. */
private Key mSpaceKey;
private Drawable mSpacebarIcon;
private final Drawable mSpacebarBackground;
// Stuff to draw language name on spacebar.
private final int mLanguageOnSpacebarFinalAlpha;
private ObjectAnimator mLanguageOnSpacebarFadeoutAnimator;
private boolean mNeedsToDisplayLanguage;
private boolean mHasMultipleEnabledIMEsOrSubtypes;
private int mLanguageOnSpacebarAnimAlpha = Constants.Color.ALPHA_OPAQUE;
private final float mLanguageOnSpacebarTextRatio;
private float mLanguageOnSpacebarTextSize;
private final int mLanguageOnSpacebarTextColor;
private final int mLanguageOnSpacebarTextShadowColor;
// The minimum x-scale to fit the language name on spacebar.
private static final float MINIMUM_XSCALE_OF_LANGUAGE_NAME = 0.8f;
// Stuff to draw auto correction LED on spacebar.
private boolean mAutoCorrectionSpacebarLedOn;
private final boolean mAutoCorrectionSpacebarLedEnabled;
private final Drawable mAutoCorrectionSpacebarLedIcon;
private static final int SPACE_LED_LENGTH_PERCENT = 80;
// Stuff to draw altCodeWhileTyping keys.
private final ObjectAnimator mAltCodeKeyWhileTypingFadeoutAnimator;
private final ObjectAnimator mAltCodeKeyWhileTypingFadeinAnimator;
private int mAltCodeKeyWhileTypingAnimAlpha = Constants.Color.ALPHA_OPAQUE;
// Preview placer view
private final PreviewPlacerView mPreviewPlacerView;
private final int[] mOriginCoords = CoordinateUtils.newInstance();
private final GestureFloatingPreviewText mGestureFloatingPreviewText;
private final GestureTrailsPreview mGestureTrailsPreview;
private final SlidingKeyInputPreview mSlidingKeyInputPreview;
// Key preview
private static final boolean FADE_OUT_KEY_TOP_LETTER_WHEN_KEY_IS_PRESSED = false;
private final int mKeyPreviewLayoutId;
private final int mKeyPreviewOffset;
private final int mKeyPreviewHeight;
// Free {@link TextView} pool that can be used for key preview.
private final ArrayDeque<TextView> mFreeKeyPreviewTextViews = CollectionUtils.newArrayDeque();
// Map from {@link Key} to {@link TextView} that is currently being displayed as key preview.
private final HashMap<Key,TextView> mShowingKeyPreviewTextViews = CollectionUtils.newHashMap();
private final KeyPreviewDrawParams mKeyPreviewDrawParams = new KeyPreviewDrawParams();
private boolean mShowKeyPreviewPopup = true;
private int mKeyPreviewLingerTimeout;
private int mKeyPreviewZoomInDuration;
private int mKeyPreviewZoomOutDuration;
private static final float KEY_PREVIEW_START_ZOOM_IN_SCALE = 0.7f;
private static final float KEY_PREVIEW_END_ZOOM_IN_SCALE = 1.0f;
private static final float KEY_PREVIEW_END_ZOOM_OUT_SCALE = 0.7f;
private static final AccelerateInterpolator ACCELERATE_INTERPOLATOR =
new AccelerateInterpolator();
private static final DecelerateInterpolator DECELERATE_INTERPOLATOR =
new DecelerateInterpolator();
// More keys keyboard
private final Paint mBackgroundDimAlphaPaint = new Paint();
private boolean mNeedsToDimEntireKeyboard;
private final View mMoreKeysKeyboardContainer;
private final WeakHashMap<Key, Keyboard> mMoreKeysKeyboardCache =
CollectionUtils.newWeakHashMap();
private final boolean mConfigShowMoreKeysKeyboardAtTouchedPoint;
// More keys panel (used by both more keys keyboard and more suggestions view)
// TODO: Consider extending to support multiple more keys panels
private MoreKeysPanel mMoreKeysPanel;
// Gesture floating preview text
// TODO: Make this parameter customizable by user via settings.
private int mGestureFloatingPreviewTextLingerTimeout;
private final KeyDetector mKeyDetector;
private final NonDistinctMultitouchHelper mNonDistinctMultitouchHelper;
private final TimerHandler mKeyTimerHandler;
private final int mLanguageOnSpacebarHorizontalMargin;
private final DrawingHandler mDrawingHandler =
new DrawingHandler(this);
public MainKeyboardView(final Context context, final AttributeSet attrs) {
this(context, attrs, R.attr.mainKeyboardViewStyle);
}
public MainKeyboardView(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
mPreviewPlacerView = new PreviewPlacerView(context, attrs);
final TypedArray mainKeyboardViewAttr = context.obtainStyledAttributes(
attrs, R.styleable.MainKeyboardView, defStyle, R.style.MainKeyboardView);
final int ignoreAltCodeKeyTimeout = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_ignoreAltCodeKeyTimeout, 0);
final int gestureRecognitionUpdateTime = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_gestureRecognitionUpdateTime, 0);
mKeyTimerHandler = new TimerHandler(
this, ignoreAltCodeKeyTimeout, gestureRecognitionUpdateTime);
final float keyHysteresisDistance = mainKeyboardViewAttr.getDimension(
R.styleable.MainKeyboardView_keyHysteresisDistance, 0.0f);
final float keyHysteresisDistanceForSlidingModifier = mainKeyboardViewAttr.getDimension(
R.styleable.MainKeyboardView_keyHysteresisDistanceForSlidingModifier, 0.0f);
mKeyDetector = new KeyDetector(
keyHysteresisDistance, keyHysteresisDistanceForSlidingModifier);
PointerTracker.init(mainKeyboardViewAttr, mKeyTimerHandler, this /* DrawingProxy */,
mKeyDetector);
final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
final boolean forceNonDistinctMultitouch = prefs.getBoolean(
DebugSettings.PREF_FORCE_NON_DISTINCT_MULTITOUCH, false);
final boolean hasDistinctMultitouch = context.getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)
&& !forceNonDistinctMultitouch;
mNonDistinctMultitouchHelper = hasDistinctMultitouch ? null
: new NonDistinctMultitouchHelper(PointerTracker.getPointerTracker(0));
final int backgroundDimAlpha = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_backgroundDimAlpha, 0);
mBackgroundDimAlphaPaint.setColor(Color.BLACK);
mBackgroundDimAlphaPaint.setAlpha(backgroundDimAlpha);
mSpacebarBackground = mainKeyboardViewAttr.getDrawable(
R.styleable.MainKeyboardView_spacebarBackground);
mAutoCorrectionSpacebarLedEnabled = mainKeyboardViewAttr.getBoolean(
R.styleable.MainKeyboardView_autoCorrectionSpacebarLedEnabled, false);
mAutoCorrectionSpacebarLedIcon = mainKeyboardViewAttr.getDrawable(
R.styleable.MainKeyboardView_autoCorrectionSpacebarLedIcon);
mLanguageOnSpacebarTextRatio = mainKeyboardViewAttr.getFraction(
R.styleable.MainKeyboardView_languageOnSpacebarTextRatio, 1, 1, 1.0f);
mLanguageOnSpacebarTextColor = mainKeyboardViewAttr.getColor(
R.styleable.MainKeyboardView_languageOnSpacebarTextColor, 0);
mLanguageOnSpacebarTextShadowColor = mainKeyboardViewAttr.getColor(
R.styleable.MainKeyboardView_languageOnSpacebarTextShadowColor, 0);
mLanguageOnSpacebarFinalAlpha = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_languageOnSpacebarFinalAlpha,
Constants.Color.ALPHA_OPAQUE);
final int languageOnSpacebarFadeoutAnimatorResId = mainKeyboardViewAttr.getResourceId(
R.styleable.MainKeyboardView_languageOnSpacebarFadeoutAnimator, 0);
final int altCodeKeyWhileTypingFadeoutAnimatorResId = mainKeyboardViewAttr.getResourceId(
R.styleable.MainKeyboardView_altCodeKeyWhileTypingFadeoutAnimator, 0);
final int altCodeKeyWhileTypingFadeinAnimatorResId = mainKeyboardViewAttr.getResourceId(
R.styleable.MainKeyboardView_altCodeKeyWhileTypingFadeinAnimator, 0);
mKeyPreviewOffset = mainKeyboardViewAttr.getDimensionPixelOffset(
R.styleable.MainKeyboardView_keyPreviewOffset, 0);
mKeyPreviewHeight = mainKeyboardViewAttr.getDimensionPixelSize(
R.styleable.MainKeyboardView_keyPreviewHeight, 0);
mKeyPreviewLingerTimeout = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_keyPreviewLingerTimeout, 0);
mKeyPreviewLayoutId = mainKeyboardViewAttr.getResourceId(
R.styleable.MainKeyboardView_keyPreviewLayout, 0);
if (mKeyPreviewLayoutId == 0) {
mShowKeyPreviewPopup = false;
}
mKeyPreviewZoomInDuration = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_keyPreviewZoomInDuration, 0);
mKeyPreviewZoomOutDuration = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_keyPreviewZoomOutDuration, 0);
final int moreKeysKeyboardLayoutId = mainKeyboardViewAttr.getResourceId(
R.styleable.MainKeyboardView_moreKeysKeyboardLayout, 0);
mConfigShowMoreKeysKeyboardAtTouchedPoint = mainKeyboardViewAttr.getBoolean(
R.styleable.MainKeyboardView_showMoreKeysKeyboardAtTouchedPoint, false);
mGestureFloatingPreviewTextLingerTimeout = mainKeyboardViewAttr.getInt(
R.styleable.MainKeyboardView_gestureFloatingPreviewTextLingerTimeout, 0);
mGestureFloatingPreviewText = new GestureFloatingPreviewText(
mPreviewPlacerView, mainKeyboardViewAttr);
mPreviewPlacerView.addPreview(mGestureFloatingPreviewText);
mGestureTrailsPreview = new GestureTrailsPreview(
mPreviewPlacerView, mainKeyboardViewAttr);
mPreviewPlacerView.addPreview(mGestureTrailsPreview);
mSlidingKeyInputPreview = new SlidingKeyInputPreview(
mPreviewPlacerView, mainKeyboardViewAttr);
mPreviewPlacerView.addPreview(mSlidingKeyInputPreview);
mainKeyboardViewAttr.recycle();
mMoreKeysKeyboardContainer = LayoutInflater.from(getContext())
.inflate(moreKeysKeyboardLayoutId, null);
mLanguageOnSpacebarFadeoutAnimator = loadObjectAnimator(
languageOnSpacebarFadeoutAnimatorResId, this);
mAltCodeKeyWhileTypingFadeoutAnimator = loadObjectAnimator(
altCodeKeyWhileTypingFadeoutAnimatorResId, this);
mAltCodeKeyWhileTypingFadeinAnimator = loadObjectAnimator(
altCodeKeyWhileTypingFadeinAnimatorResId, this);
mKeyboardActionListener = KeyboardActionListener.EMPTY_LISTENER;
mLanguageOnSpacebarHorizontalMargin = (int)getResources().getDimension(
R.dimen.config_language_on_spacebar_horizontal_margin);
}
@Override
public void setHardwareAcceleratedDrawingEnabled(final boolean enabled) {
super.setHardwareAcceleratedDrawingEnabled(enabled);
mPreviewPlacerView.setHardwareAcceleratedDrawingEnabled(enabled);
}
private ObjectAnimator loadObjectAnimator(final int resId, final Object target) {
if (resId == 0) {
// TODO: Stop returning null.
return null;
}
final ObjectAnimator animator = (ObjectAnimator)AnimatorInflater.loadAnimator(
getContext(), resId);
if (animator != null) {
animator.setTarget(target);
}
return animator;
}
private static void cancelAndStartAnimators(final ObjectAnimator animatorToCancel,
final ObjectAnimator animatorToStart) {
if (animatorToCancel == null || animatorToStart == null) {
// TODO: Stop using null as a no-operation animator.
return;
}
float startFraction = 0.0f;
if (animatorToCancel.isStarted()) {
animatorToCancel.cancel();
startFraction = 1.0f - animatorToCancel.getAnimatedFraction();
}
final long startTime = (long)(animatorToStart.getDuration() * startFraction);
animatorToStart.start();
animatorToStart.setCurrentPlayTime(startTime);
}
// Implements {@link TimerHander.Callbacks} method.
@Override
public void startWhileTypingFadeinAnimation() {
cancelAndStartAnimators(
mAltCodeKeyWhileTypingFadeoutAnimator, mAltCodeKeyWhileTypingFadeinAnimator);
}
@Override
public void startWhileTypingFadeoutAnimation() {
cancelAndStartAnimators(
mAltCodeKeyWhileTypingFadeinAnimator, mAltCodeKeyWhileTypingFadeoutAnimator);
}
@ExternallyReferenced
public int getLanguageOnSpacebarAnimAlpha() {
return mLanguageOnSpacebarAnimAlpha;
}
@ExternallyReferenced
public void setLanguageOnSpacebarAnimAlpha(final int alpha) {
mLanguageOnSpacebarAnimAlpha = alpha;
invalidateKey(mSpaceKey);
}
@ExternallyReferenced
public int getAltCodeKeyWhileTypingAnimAlpha() {
return mAltCodeKeyWhileTypingAnimAlpha;
}
@ExternallyReferenced
public void setAltCodeKeyWhileTypingAnimAlpha(final int alpha) {
if (mAltCodeKeyWhileTypingAnimAlpha == alpha) {
return;
}
// Update the visual of alt-code-key-while-typing.
mAltCodeKeyWhileTypingAnimAlpha = alpha;
final Keyboard keyboard = getKeyboard();
if (keyboard == null) {
return;
}
for (final Key key : keyboard.mAltCodeKeysWhileTyping) {
invalidateKey(key);
}
}
public void setKeyboardActionListener(final KeyboardActionListener listener) {
mKeyboardActionListener = listener;
PointerTracker.setKeyboardActionListener(listener);
}
// TODO: We should reconsider which coordinate system should be used to represent keyboard
// event.
public int getKeyX(final int x) {
return Constants.isValidCoordinate(x) ? mKeyDetector.getTouchX(x) : x;
}
// TODO: We should reconsider which coordinate system should be used to represent keyboard
// event.
public int getKeyY(final int y) {
return Constants.isValidCoordinate(y) ? mKeyDetector.getTouchY(y) : y;
}
/**
* Attaches a keyboard to this view. The keyboard can be switched at any time and the
* view will re-layout itself to accommodate the keyboard.
* @see Keyboard
* @see #getKeyboard()
* @param keyboard the keyboard to display in this view
*/
@Override
public void setKeyboard(final Keyboard keyboard) {
// Remove any pending messages.
mKeyTimerHandler.cancelAllKeyTimers();
super.setKeyboard(keyboard);
mKeyDetector.setKeyboard(
keyboard, -getPaddingLeft(), -getPaddingTop() + getVerticalCorrection());
PointerTracker.setKeyDetector(mKeyDetector);
PointerTracker.setKeyboardActionListener(mKeyboardActionListener);
mMoreKeysKeyboardCache.clear();
mSpaceKey = keyboard.getKey(Constants.CODE_SPACE);
mSpacebarIcon = (mSpaceKey != null)
? mSpaceKey.getIcon(keyboard.mIconsSet, Constants.Color.ALPHA_OPAQUE) : null;
final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
mLanguageOnSpacebarTextSize = keyHeight * mLanguageOnSpacebarTextRatio;
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
final int orientation = getContext().getResources().getConfiguration().orientation;
ResearchLogger.mainKeyboardView_setKeyboard(keyboard, orientation);
}
// This always needs to be set since the accessibility state can
// potentially change without the keyboard being set again.
AccessibleKeyboardViewProxy.getInstance().setKeyboard();
}
/**
* Enables or disables the key feedback popup. This is a popup that shows a magnified
* version of the depressed key. By default the preview is enabled.
* @param previewEnabled whether or not to enable the key feedback preview
* @param delay the delay after which the preview is dismissed
* @see #isKeyPreviewPopupEnabled()
*/
public void setKeyPreviewPopupEnabled(final boolean previewEnabled, final int delay) {
mShowKeyPreviewPopup = previewEnabled;
mKeyPreviewLingerTimeout = delay;
}
private void locatePreviewPlacerView() {
if (mPreviewPlacerView.getParent() != null) {
return;
}
final int width = getWidth();
final int height = getHeight();
if (width == 0 || height == 0) {
// In transient state.
return;
}
getLocationInWindow(mOriginCoords);
final DisplayMetrics dm = getResources().getDisplayMetrics();
if (CoordinateUtils.y(mOriginCoords) < dm.heightPixels / 4) {
// In transient state.
return;
}
final View rootView = getRootView();
if (rootView == null) {
Log.w(TAG, "Cannot find root view");
return;
}
final ViewGroup windowContentView = (ViewGroup)rootView.findViewById(android.R.id.content);
// Note: It'd be very weird if we get null by android.R.id.content.
if (windowContentView == null) {
Log.w(TAG, "Cannot find android.R.id.content view to add PreviewPlacerView");
} else {
windowContentView.addView(mPreviewPlacerView);
mPreviewPlacerView.setKeyboardViewGeometry(mOriginCoords, width, height);
}
}
/**
* Returns the enabled state of the key feedback preview
* @return whether or not the key feedback preview is enabled
* @see #setKeyPreviewPopupEnabled(boolean, int)
*/
public boolean isKeyPreviewPopupEnabled() {
return mShowKeyPreviewPopup;
}
private TextView getKeyPreviewTextView(final Key key) {
TextView previewTextView = mShowingKeyPreviewTextViews.remove(key);
if (previewTextView != null) {
return previewTextView;
}
previewTextView = mFreeKeyPreviewTextViews.poll();
if (previewTextView != null) {
return previewTextView;
}
final Context context = getContext();
if (mKeyPreviewLayoutId != 0) {
previewTextView = (TextView)LayoutInflater.from(context)
.inflate(mKeyPreviewLayoutId, null);
} else {
previewTextView = new TextView(context);
}
locatePreviewPlacerView();
mPreviewPlacerView.addView(
previewTextView, ViewLayoutUtils.newLayoutParam(mPreviewPlacerView, 0, 0));
return previewTextView;
}
// Implements {@link DrawingHandler.Callbacks} method.
@Override
public void dismissAllKeyPreviews() {
for (final Key key : new HashSet<Key>(mShowingKeyPreviewTextViews.keySet())) {
dismissKeyPreviewWithoutDelay(key);
}
PointerTracker.setReleasedKeyGraphicsToAllKeys();
}
// Background state set
private static final int[][][] KEY_PREVIEW_BACKGROUND_STATE_TABLE = {
{ // STATE_MIDDLE
EMPTY_STATE_SET,
{ R.attr.state_has_morekeys }
},
{ // STATE_LEFT
{ R.attr.state_left_edge },
{ R.attr.state_left_edge, R.attr.state_has_morekeys }
},
{ // STATE_RIGHT
{ R.attr.state_right_edge },
{ R.attr.state_right_edge, R.attr.state_has_morekeys }
}
};
private static final int STATE_MIDDLE = 0;
private static final int STATE_LEFT = 1;
private static final int STATE_RIGHT = 2;
private static final int STATE_NORMAL = 0;
private static final int STATE_HAS_MOREKEYS = 1;
// TODO: Take this method out of this class.
@Override
public void showKeyPreview(final Key key) {
// If key is invalid or IME is already closed, we must not show key preview.
// Trying to show key preview while root window is closed causes
// WindowManager.BadTokenException.
if (key == null) {
return;
}
final KeyPreviewDrawParams previewParams = mKeyPreviewDrawParams;
final Keyboard keyboard = getKeyboard();
if (!mShowKeyPreviewPopup) {
previewParams.mPreviewVisibleOffset = -keyboard.mVerticalGap;
return;
}
final TextView previewTextView = getKeyPreviewTextView(key);
final KeyDrawParams drawParams = mKeyDrawParams;
previewTextView.setTextColor(drawParams.mPreviewTextColor);
final Drawable background = previewTextView.getBackground();
final String label = key.getPreviewLabel();
// What we show as preview should match what we show on a key top in onDraw().
if (label != null) {
// TODO Should take care of temporaryShiftLabel here.
previewTextView.setCompoundDrawables(null, null, null, null);
previewTextView.setTextSize(TypedValue.COMPLEX_UNIT_PX,
key.selectPreviewTextSize(drawParams));
previewTextView.setTypeface(key.selectPreviewTypeface(drawParams));
previewTextView.setText(label);
} else {
previewTextView.setCompoundDrawables(null, null, null,
key.getPreviewIcon(keyboard.mIconsSet));
previewTextView.setText(null);
}
previewTextView.measure(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
final int keyDrawWidth = key.getDrawWidth();
final int previewWidth = previewTextView.getMeasuredWidth();
final int previewHeight = mKeyPreviewHeight;
// The width and height of visible part of the key preview background. The content marker
// of the background 9-patch have to cover the visible part of the background.
previewParams.mPreviewVisibleWidth = previewWidth - previewTextView.getPaddingLeft()
- previewTextView.getPaddingRight();
previewParams.mPreviewVisibleHeight = previewHeight - previewTextView.getPaddingTop()
- previewTextView.getPaddingBottom();
// The distance between the top edge of the parent key and the bottom of the visible part
// of the key preview background.
previewParams.mPreviewVisibleOffset =
mKeyPreviewOffset - previewTextView.getPaddingBottom();
getLocationInWindow(mOriginCoords);
// The key preview is horizontally aligned with the center of the visible part of the
// parent key. If it doesn't fit in this {@link KeyboardView}, it is moved inward to fit and
// the left/right background is used if such background is specified.
final int statePosition;
int previewX = key.getDrawX() - (previewWidth - keyDrawWidth) / 2
+ CoordinateUtils.x(mOriginCoords);
if (previewX < 0) {
previewX = 0;
statePosition = STATE_LEFT;
} else if (previewX > getWidth() - previewWidth) {
previewX = getWidth() - previewWidth;
statePosition = STATE_RIGHT;
} else {
statePosition = STATE_MIDDLE;
}
// The key preview is placed vertically above the top edge of the parent key with an
// arbitrary offset.
final int previewY = key.getY() - previewHeight + mKeyPreviewOffset
+ CoordinateUtils.y(mOriginCoords);
if (background != null) {
final int hasMoreKeys = (key.getMoreKeys() != null) ? STATE_HAS_MOREKEYS : STATE_NORMAL;
background.setState(KEY_PREVIEW_BACKGROUND_STATE_TABLE[statePosition][hasMoreKeys]);
}
ViewLayoutUtils.placeViewAt(
previewTextView, previewX, previewY, previewWidth, previewHeight);
if (!isHardwareAccelerated()) {
previewTextView.setVisibility(VISIBLE);
mShowingKeyPreviewTextViews.put(key, previewTextView);
return;
}
previewTextView.setPivotX(previewWidth / 2.0f);
previewTextView.setPivotY(previewHeight);
final Animator zoomIn = createZoomInAniation(key, previewTextView);
final Animator zoomOut = createZoomOutAnimation(key, previewTextView);
final KeyPreviewAnimations animation = new KeyPreviewAnimations(zoomIn, zoomOut);
previewTextView.setTag(animation);
animation.startZoomIn();
}
// TODO: Move this internal class out to a separate external class.
private static class KeyPreviewAnimations extends AnimatorListenerAdapter {
private final Animator mZoomIn;
private final Animator mZoomOut;
public KeyPreviewAnimations(final Animator zoomIn, final Animator zoomOut) {
mZoomIn = zoomIn;
mZoomOut = zoomOut;
}
public void startZoomIn() {
mZoomIn.start();
}
public void startZoomOut() {
if (mZoomIn.isRunning()) {
mZoomIn.addListener(this);
return;
}
mZoomOut.start();
}
@Override
public void onAnimationEnd(final Animator animation) {
mZoomOut.start();
}
}
// TODO: Take this method out of this class.
private Animator createZoomInAniation(final Key key, final TextView previewTextView) {
final ObjectAnimator scaleXAnimation = ObjectAnimator.ofFloat(
previewTextView, SCALE_X, KEY_PREVIEW_START_ZOOM_IN_SCALE,
KEY_PREVIEW_END_ZOOM_IN_SCALE);
final ObjectAnimator scaleYAnimation = ObjectAnimator.ofFloat(
previewTextView, SCALE_Y, KEY_PREVIEW_START_ZOOM_IN_SCALE,
KEY_PREVIEW_END_ZOOM_IN_SCALE);
final AnimatorSet zoomInAnimation = new AnimatorSet();
zoomInAnimation.play(scaleXAnimation).with(scaleYAnimation);
// TODO: Implement preference option to control key preview animation duration.
zoomInAnimation.setDuration(mKeyPreviewZoomInDuration);
zoomInAnimation.setInterpolator(DECELERATE_INTERPOLATOR);
zoomInAnimation.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(final Animator animation) {
previewTextView.setVisibility(VISIBLE);
mShowingKeyPreviewTextViews.put(key, previewTextView);
}
});
return zoomInAnimation;
}
// TODO: Take this method out of this class.
private Animator createZoomOutAnimation(final Key key, final TextView previewTextView) {
final ObjectAnimator scaleXAnimation = ObjectAnimator.ofFloat(
previewTextView, SCALE_X, KEY_PREVIEW_END_ZOOM_OUT_SCALE);
final ObjectAnimator scaleYAnimation = ObjectAnimator.ofFloat(
previewTextView, SCALE_Y, KEY_PREVIEW_END_ZOOM_OUT_SCALE);
final AnimatorSet zoomOutAnimation = new AnimatorSet();
zoomOutAnimation.play(scaleXAnimation).with(scaleYAnimation);
// TODO: Implement preference option to control key preview animation duration.
zoomOutAnimation.setDuration(mKeyPreviewZoomOutDuration);
zoomOutAnimation.setInterpolator(ACCELERATE_INTERPOLATOR);
zoomOutAnimation.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(final Animator animation) {
dismissKeyPreviewWithoutDelay(key);
}
});
return zoomOutAnimation;
}
// Implements {@link TimerHandler.Callbacks} method.
// TODO: Take this method out of this class.
@Override
public void dismissKeyPreviewWithoutDelay(final Key key) {
if (key == null) {
return;
}
final TextView previewTextView = mShowingKeyPreviewTextViews.remove(key);
if (previewTextView != null) {
final Object tag = previewTextView.getTag();
if (tag instanceof Animator) {
((Animator)tag).cancel();
}
previewTextView.setTag(null);
previewTextView.setVisibility(INVISIBLE);
mFreeKeyPreviewTextViews.add(previewTextView);
}
// To redraw key top letter.
invalidateKey(key);
}
// TODO: Take this method out of this class.
@Override
public void dismissKeyPreview(final Key key) {
final TextView previewTextView = mShowingKeyPreviewTextViews.get(key);
if (previewTextView == null) {
return;
}
if (!isHardwareAccelerated()) {
// TODO: Implement preference option to control key preview method and duration.
mDrawingHandler.dismissKeyPreview(mKeyPreviewLingerTimeout, key);
return;
}
final Object tag = previewTextView.getTag();
if (tag instanceof KeyPreviewAnimations) {
final KeyPreviewAnimations animation = (KeyPreviewAnimations)tag;
animation.startZoomOut();
}
}
public void setSlidingKeyInputPreviewEnabled(final boolean enabled) {
mSlidingKeyInputPreview.setPreviewEnabled(enabled);
}
@Override
public void showSlidingKeyInputPreview(final PointerTracker tracker) {
locatePreviewPlacerView();
mSlidingKeyInputPreview.setPreviewPosition(tracker);
}
@Override
public void dismissSlidingKeyInputPreview() {
mSlidingKeyInputPreview.dismissSlidingKeyInputPreview();
}
private void setGesturePreviewMode(final boolean isGestureTrailEnabled,
final boolean isGestureFloatingPreviewTextEnabled) {
mGestureFloatingPreviewText.setPreviewEnabled(isGestureFloatingPreviewTextEnabled);
mGestureTrailsPreview.setPreviewEnabled(isGestureTrailEnabled);
}
// Implements {@link DrawingHandler.Callbacks} method.
@Override
public void showGestureFloatingPreviewText(final SuggestedWords suggestedWords) {
locatePreviewPlacerView();
mGestureFloatingPreviewText.setSuggetedWords(suggestedWords);
}
public void dismissGestureFloatingPreviewText() {
locatePreviewPlacerView();
mDrawingHandler.dismissGestureFloatingPreviewText(mGestureFloatingPreviewTextLingerTimeout);
}
@Override
public void showGestureTrail(final PointerTracker tracker,
final boolean showsFloatingPreviewText) {
locatePreviewPlacerView();
if (showsFloatingPreviewText) {
mGestureFloatingPreviewText.setPreviewPosition(tracker);
}
mGestureTrailsPreview.setPreviewPosition(tracker);
}
// Note that this method is called from a non-UI thread.
public void setMainDictionaryAvailability(final boolean mainDictionaryAvailable) {
PointerTracker.setMainDictionaryAvailability(mainDictionaryAvailable);
}
public void setGestureHandlingEnabledByUser(final boolean isGestureHandlingEnabledByUser,
final boolean isGestureTrailEnabled,
final boolean isGestureFloatingPreviewTextEnabled) {
PointerTracker.setGestureHandlingEnabledByUser(isGestureHandlingEnabledByUser);
setGesturePreviewMode(isGestureHandlingEnabledByUser && isGestureTrailEnabled,
isGestureHandlingEnabledByUser && isGestureFloatingPreviewTextEnabled);
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
// Notify the ResearchLogger (development only diagnostics) that the keyboard view has
// been attached. This is needed to properly show the splash screen, which requires that
// the window token of the KeyboardView be non-null.
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.getInstance().mainKeyboardView_onAttachedToWindow(this);
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mPreviewPlacerView.removeAllViews();
// Notify the ResearchLogger (development only diagnostics) that the keyboard view has
// been detached. This is needed to invalidate the reference of {@link MainKeyboardView}
// to null.
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.getInstance().mainKeyboardView_onDetachedFromWindow();
}
}
private MoreKeysPanel onCreateMoreKeysPanel(final Key key, final Context context) {
if (key.getMoreKeys() == null) {
return null;
}
Keyboard moreKeysKeyboard = mMoreKeysKeyboardCache.get(key);
if (moreKeysKeyboard == null) {
moreKeysKeyboard = new MoreKeysKeyboard.Builder(
context, key, this, mKeyPreviewDrawParams).build();
mMoreKeysKeyboardCache.put(key, moreKeysKeyboard);
}
final View container = mMoreKeysKeyboardContainer;
final MoreKeysKeyboardView moreKeysKeyboardView =
(MoreKeysKeyboardView)container.findViewById(R.id.more_keys_keyboard_view);
moreKeysKeyboardView.setKeyboard(moreKeysKeyboard);
container.measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
return moreKeysKeyboardView;
}
// Implements {@link TimerHandler.Callbacks} method.
/**
* Called when a key is long pressed.
* @param tracker the pointer tracker which pressed the parent key
*/
@Override
public void onLongPress(final PointerTracker tracker) {
if (isShowingMoreKeysPanel()) {
return;
}
final Key key = tracker.getKey();
if (key == null) {
return;
}
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.mainKeyboardView_onLongPress();
}
final KeyboardActionListener listener = mKeyboardActionListener;
if (key.hasNoPanelAutoMoreKey()) {
final int moreKeyCode = key.getMoreKeys()[0].mCode;
tracker.onLongPressed();
listener.onPressKey(moreKeyCode, 0 /* repeatCount */, true /* isSinglePointer */);
listener.onCodeInput(moreKeyCode,
Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE);
listener.onReleaseKey(moreKeyCode, false /* withSliding */);
return;
}
final int code = key.getCode();
if (code == Constants.CODE_SPACE || code == Constants.CODE_LANGUAGE_SWITCH) {
// Long pressing the space key invokes IME switcher dialog.
if (listener.onCustomRequest(Constants.CUSTOM_CODE_SHOW_INPUT_METHOD_PICKER)) {
tracker.onLongPressed();
listener.onReleaseKey(code, false /* withSliding */);
return;
}
}
openMoreKeysPanel(key, tracker);
}
private void openMoreKeysPanel(final Key key, final PointerTracker tracker) {
final MoreKeysPanel moreKeysPanel = onCreateMoreKeysPanel(key, getContext());
if (moreKeysPanel == null) {
return;
}
final int[] lastCoords = CoordinateUtils.newInstance();
tracker.getLastCoordinates(lastCoords);
final boolean keyPreviewEnabled = isKeyPreviewPopupEnabled() && !key.noKeyPreview();
// The more keys keyboard is usually horizontally aligned with the center of the parent key.
// If showMoreKeysKeyboardAtTouchedPoint is true and the key preview is disabled, the more
// keys keyboard is placed at the touch point of the parent key.
final int pointX = (mConfigShowMoreKeysKeyboardAtTouchedPoint && !keyPreviewEnabled)
? CoordinateUtils.x(lastCoords)
: key.getX() + key.getWidth() / 2;
// The more keys keyboard is usually vertically aligned with the top edge of the parent key
// (plus vertical gap). If the key preview is enabled, the more keys keyboard is vertically
// aligned with the bottom edge of the visible part of the key preview.
// {@code mPreviewVisibleOffset} has been set appropriately in
// {@link KeyboardView#showKeyPreview(PointerTracker)}.
final int pointY = key.getY() + mKeyPreviewDrawParams.mPreviewVisibleOffset;
moreKeysPanel.showMoreKeysPanel(this, this, pointX, pointY, mKeyboardActionListener);
tracker.onShowMoreKeysPanel(moreKeysPanel);
// TODO: Implement zoom in animation of more keys panel.
dismissKeyPreviewWithoutDelay(key);
}
public boolean isInDraggingFinger() {
if (isShowingMoreKeysPanel()) {
return true;
}
return PointerTracker.isAnyInDraggingFinger();
}
@Override
public void onShowMoreKeysPanel(final MoreKeysPanel panel) {
locatePreviewPlacerView();
panel.showInParent(mPreviewPlacerView);
mMoreKeysPanel = panel;
dimEntireKeyboard(true /* dimmed */);
}
public boolean isShowingMoreKeysPanel() {
return mMoreKeysPanel != null && mMoreKeysPanel.isShowingInParent();
}
@Override
public void onCancelMoreKeysPanel(final MoreKeysPanel panel) {
PointerTracker.dismissAllMoreKeysPanels();
}
@Override
public void onDismissMoreKeysPanel(final MoreKeysPanel panel) {
dimEntireKeyboard(false /* dimmed */);
if (isShowingMoreKeysPanel()) {
mMoreKeysPanel.removeFromParent();
mMoreKeysPanel = null;
}
}
public void startDoubleTapShiftKeyTimer() {
mKeyTimerHandler.startDoubleTapShiftKeyTimer();
}
public void cancelDoubleTapShiftKeyTimer() {
mKeyTimerHandler.cancelDoubleTapShiftKeyTimer();
}
public boolean isInDoubleTapShiftKeyTimeout() {
return mKeyTimerHandler.isInDoubleTapShiftKeyTimeout();
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) {
return AccessibleKeyboardViewProxy.getInstance().dispatchTouchEvent(event);
}
return super.dispatchTouchEvent(event);
}
@Override
public boolean onTouchEvent(final MotionEvent me) {
if (getKeyboard() == null) {
return false;
}
if (mNonDistinctMultitouchHelper != null) {
if (me.getPointerCount() > 1 && mKeyTimerHandler.isInKeyRepeat()) {
// Key repeating timer will be canceled if 2 or more keys are in action.
mKeyTimerHandler.cancelKeyRepeatTimers();
}
// Non distinct multitouch screen support
mNonDistinctMultitouchHelper.processMotionEvent(me, mKeyDetector);
return true;
}
return processMotionEvent(me);
}
public boolean processMotionEvent(final MotionEvent me) {
if (LatinImeLogger.sUsabilityStudy) {
UsabilityStudyLogUtils.writeMotionEvent(me);
}
// Currently the same "move" event is being logged twice.
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.mainKeyboardView_processMotionEvent(me);
}
final int index = me.getActionIndex();
final int id = me.getPointerId(index);
final PointerTracker tracker = PointerTracker.getPointerTracker(id);
// When a more keys panel is showing, we should ignore other fingers' single touch events
// other than the finger that is showing the more keys panel.
if (isShowingMoreKeysPanel() && !tracker.isShowingMoreKeysPanel()
&& PointerTracker.getActivePointerTrackerCount() == 1) {
return true;
}
tracker.processMotionEvent(me, mKeyDetector);
return true;
}
public void cancelAllOngoingEvents() {
mKeyTimerHandler.cancelAllMessages();
mDrawingHandler.cancelAllMessages();
dismissAllKeyPreviews();
dismissGestureFloatingPreviewText();
dismissSlidingKeyInputPreview();
PointerTracker.dismissAllMoreKeysPanels();
PointerTracker.cancelAllPointerTrackers();
}
public void closing() {
cancelAllOngoingEvents();
mMoreKeysKeyboardCache.clear();
}
/**
* Receives hover events from the input framework.
*
* @param event The motion event to be dispatched.
* @return {@code true} if the event was handled by the view, {@code false}
* otherwise
*/
@Override
public boolean dispatchHoverEvent(final MotionEvent event) {
if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) {
final PointerTracker tracker = PointerTracker.getPointerTracker(0);
return AccessibleKeyboardViewProxy.getInstance().dispatchHoverEvent(event, tracker);
}
// Reflection doesn't support calling superclass methods.
return false;
}
public void updateShortcutKey(final boolean available) {
final Keyboard keyboard = getKeyboard();
if (keyboard == null) {
return;
}
final Key shortcutKey = keyboard.getKey(Constants.CODE_SHORTCUT);
if (shortcutKey == null) {
return;
}
shortcutKey.setEnabled(available);
invalidateKey(shortcutKey);
}
public void startDisplayLanguageOnSpacebar(final boolean subtypeChanged,
final boolean needsToDisplayLanguage, final boolean hasMultipleEnabledIMEsOrSubtypes) {
mNeedsToDisplayLanguage = needsToDisplayLanguage;
mHasMultipleEnabledIMEsOrSubtypes = hasMultipleEnabledIMEsOrSubtypes;
final ObjectAnimator animator = mLanguageOnSpacebarFadeoutAnimator;
if (animator == null) {
mNeedsToDisplayLanguage = false;
} else {
if (subtypeChanged && needsToDisplayLanguage) {
setLanguageOnSpacebarAnimAlpha(Constants.Color.ALPHA_OPAQUE);
if (animator.isStarted()) {
animator.cancel();
}
animator.start();
} else {
if (!animator.isStarted()) {
mLanguageOnSpacebarAnimAlpha = mLanguageOnSpacebarFinalAlpha;
}
}
}
invalidateKey(mSpaceKey);
}
public void updateAutoCorrectionState(final boolean isAutoCorrection) {
if (!mAutoCorrectionSpacebarLedEnabled) {
return;
}
mAutoCorrectionSpacebarLedOn = isAutoCorrection;
invalidateKey(mSpaceKey);
}
private void dimEntireKeyboard(final boolean dimmed) {
final boolean needsRedrawing = mNeedsToDimEntireKeyboard != dimmed;
mNeedsToDimEntireKeyboard = dimmed;
if (needsRedrawing) {
invalidateAllKeys();
}
}
@Override
protected void onDraw(final Canvas canvas) {
super.onDraw(canvas);
// Overlay a dark rectangle to dim.
if (mNeedsToDimEntireKeyboard) {
canvas.drawRect(0.0f, 0.0f, getWidth(), getHeight(), mBackgroundDimAlphaPaint);
}
}
// Draw key background.
@Override
protected void onDrawKeyBackground(final Key key, final Canvas canvas,
final Drawable background) {
if (key.getCode() == Constants.CODE_SPACE) {
super.onDrawKeyBackground(key, canvas, mSpacebarBackground);
return;
}
super.onDrawKeyBackground(key, canvas, background);
}
@Override
protected void onDrawKeyTopVisuals(final Key key, final Canvas canvas, final Paint paint,
final KeyDrawParams params) {
if (key.altCodeWhileTyping() && key.isEnabled()) {
params.mAnimAlpha = mAltCodeKeyWhileTypingAnimAlpha;
}
// Don't draw key top letter when key preview is showing.
if (FADE_OUT_KEY_TOP_LETTER_WHEN_KEY_IS_PRESSED
&& mShowingKeyPreviewTextViews.containsKey(key)) {
// TODO: Fade out animation for the key top letter, and fade in animation for the key
// background color when the user presses the key.
return;
}
final int code = key.getCode();
if (code == Constants.CODE_SPACE) {
drawSpacebar(key, canvas, paint);
// Whether space key needs to show the "..." popup hint for special purposes
if (key.isLongPressEnabled() && mHasMultipleEnabledIMEsOrSubtypes) {
drawKeyPopupHint(key, canvas, paint, params);
}
} else if (code == Constants.CODE_LANGUAGE_SWITCH) {
super.onDrawKeyTopVisuals(key, canvas, paint, params);
drawKeyPopupHint(key, canvas, paint, params);
} else {
super.onDrawKeyTopVisuals(key, canvas, paint, params);
}
}
private boolean fitsTextIntoWidth(final int width, final String text, final Paint paint) {
final int maxTextWidth = width - mLanguageOnSpacebarHorizontalMargin * 2;
paint.setTextScaleX(1.0f);
final float textWidth = TypefaceUtils.getStringWidth(text, paint);
if (textWidth < width) {
return true;
}
final float scaleX = maxTextWidth / textWidth;
if (scaleX < MINIMUM_XSCALE_OF_LANGUAGE_NAME) {
return false;
}
paint.setTextScaleX(scaleX);
return TypefaceUtils.getStringWidth(text, paint) < maxTextWidth;
}
// Layout language name on spacebar.
private String layoutLanguageOnSpacebar(final Paint paint,
final InputMethodSubtype subtype, final int width) {
// Choose appropriate language name to fit into the width.
final String fullText = SubtypeLocaleUtils.getFullDisplayName(subtype);
if (fitsTextIntoWidth(width, fullText, paint)) {
return fullText;
}
final String middleText = SubtypeLocaleUtils.getMiddleDisplayName(subtype);
if (fitsTextIntoWidth(width, middleText, paint)) {
return middleText;
}
final String shortText = SubtypeLocaleUtils.getShortDisplayName(subtype);
if (fitsTextIntoWidth(width, shortText, paint)) {
return shortText;
}
return "";
}
private void drawSpacebar(final Key key, final Canvas canvas, final Paint paint) {
final int width = key.getWidth();
final int height = key.getHeight();
// If input language are explicitly selected.
if (mNeedsToDisplayLanguage) {
paint.setTextAlign(Align.CENTER);
paint.setTypeface(Typeface.DEFAULT);
paint.setTextSize(mLanguageOnSpacebarTextSize);
final InputMethodSubtype subtype = getKeyboard().mId.mSubtype;
final String language = layoutLanguageOnSpacebar(paint, subtype, width);
// Draw language text with shadow
final float descent = paint.descent();
final float textHeight = -paint.ascent() + descent;
final float baseline = height / 2 + textHeight / 2;
paint.setColor(mLanguageOnSpacebarTextShadowColor);
paint.setAlpha(mLanguageOnSpacebarAnimAlpha);
canvas.drawText(language, width / 2, baseline - descent - 1, paint);
paint.setColor(mLanguageOnSpacebarTextColor);
paint.setAlpha(mLanguageOnSpacebarAnimAlpha);
canvas.drawText(language, width / 2, baseline - descent, paint);
}
// Draw the spacebar icon at the bottom
if (mAutoCorrectionSpacebarLedOn) {
final int iconWidth = width * SPACE_LED_LENGTH_PERCENT / 100;
final int iconHeight = mAutoCorrectionSpacebarLedIcon.getIntrinsicHeight();
int x = (width - iconWidth) / 2;
int y = height - iconHeight;
drawIcon(canvas, mAutoCorrectionSpacebarLedIcon, x, y, iconWidth, iconHeight);
} else if (mSpacebarIcon != null) {
final int iconWidth = mSpacebarIcon.getIntrinsicWidth();
final int iconHeight = mSpacebarIcon.getIntrinsicHeight();
int x = (width - iconWidth) / 2;
int y = height - iconHeight;
drawIcon(canvas, mSpacebarIcon, x, y, iconWidth, iconHeight);
}
}
@Override
public void deallocateMemory() {
super.deallocateMemory();
mGestureTrailsPreview.deallocateMemory();
}
}