923 lines
36 KiB
Java
923 lines
36 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.android.inputmethod.latin;
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import android.content.Context;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.content.res.XmlResourceParser;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.ColorFilter;
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import android.graphics.Paint;
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import android.graphics.Paint.Align;
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import android.graphics.PixelFormat;
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import android.graphics.PorterDuff;
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import android.graphics.Rect;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.text.TextPaint;
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import android.util.Log;
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import android.view.ViewConfiguration;
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import android.view.inputmethod.EditorInfo;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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public class LatinKeyboard extends BaseKeyboard {
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private static final boolean DEBUG_PREFERRED_LETTER = false;
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private static final String TAG = "LatinKeyboard";
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private static final int OPACITY_FULLY_OPAQUE = 255;
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private static final int SPACE_LED_LENGTH_PERCENT = 80;
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private Drawable mShiftLockIcon;
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private Drawable mShiftLockPreviewIcon;
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private final HashMap<Key, Drawable> mOldShiftIcons = new HashMap<Key, Drawable>();
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private Drawable mSpaceIcon;
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private Drawable mSpaceAutoCompletionIndicator;
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private Drawable mSpacePreviewIcon;
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private Drawable mMicIcon;
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private Drawable mMicPreviewIcon;
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private Drawable m123MicIcon;
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private Drawable m123MicPreviewIcon;
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private final Drawable mButtonArrowLeftIcon;
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private final Drawable mButtonArrowRightIcon;
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private Key mEnterKey;
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private Key mF1Key;
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private final Drawable mHintIcon;
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private Key mSpaceKey;
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private Key m123Key;
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private int mSpaceKeyIndex = -1;
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private int mSpaceDragStartX;
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private int mSpaceDragLastDiff;
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private Locale mLocale;
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private LanguageSwitcher mLanguageSwitcher;
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private final Resources mRes;
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private final Context mContext;
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private int mMode; // TODO: remove this and use the corresponding mode in the parent class
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// Whether this keyboard has voice icon on it
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private boolean mHasVoiceButton;
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// Whether voice icon is enabled at all
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private boolean mVoiceEnabled;
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private final boolean mIsAlphaKeyboard;
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private CharSequence m123Label;
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private boolean mCurrentlyInSpace;
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private SlidingLocaleDrawable mSlidingLocaleIcon;
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private int[] mPrefLetterFrequencies;
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private int mPrefLetter;
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private int mPrefLetterX;
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private int mPrefLetterY;
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private int mPrefDistance;
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// Default Enter key attributes
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private final Drawable mDefaultEnterIcon;
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private final Drawable mDefaultEnterPreview;
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private final CharSequence mDefaultEnterLabel;
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private final CharSequence mDefaultEnterText;
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// TODO: generalize for any keyboardId
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private boolean mIsBlackSym;
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private static final int SHIFT_OFF = 0;
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private static final int SHIFT_ON = 1;
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private static final int SHIFT_LOCKED = 2;
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private int mShiftState = SHIFT_OFF;
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private static final float SPACEBAR_DRAG_THRESHOLD = 0.8f;
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private static final float OVERLAP_PERCENTAGE_LOW_PROB = 0.70f;
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private static final float OVERLAP_PERCENTAGE_HIGH_PROB = 0.85f;
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// Minimum width of space key preview (proportional to keyboard width)
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private static final float SPACEBAR_POPUP_MIN_RATIO = 0.4f;
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// Height in space key the language name will be drawn. (proportional to space key height)
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private static final float SPACEBAR_LANGUAGE_BASELINE = 0.6f;
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// If the full language name needs to be smaller than this value to be drawn on space key,
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// its short language name will be used instead.
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private static final float MINIMUM_SCALE_OF_LANGUAGE_NAME = 0.8f;
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private static int sSpacebarVerticalCorrection;
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public LatinKeyboard(Context context, KeyboardSwitcher.KeyboardId id) {
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super(context, id);
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final Resources res = context.getResources();
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mContext = context;
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mRes = res;
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mMode = id.mMode;
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mShiftLockIcon = res.getDrawable(R.drawable.sym_keyboard_shift_locked);
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mShiftLockPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_shift_locked);
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setDefaultBounds(mShiftLockPreviewIcon);
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mSpaceIcon = res.getDrawable(R.drawable.sym_keyboard_space);
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mSpaceAutoCompletionIndicator = res.getDrawable(R.drawable.sym_keyboard_space_led);
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mSpacePreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_space);
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mMicIcon = res.getDrawable(R.drawable.sym_keyboard_mic);
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mMicPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_mic);
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setDefaultBounds(mMicPreviewIcon);
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mButtonArrowLeftIcon = res.getDrawable(R.drawable.sym_keyboard_language_arrows_left);
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mButtonArrowRightIcon = res.getDrawable(R.drawable.sym_keyboard_language_arrows_right);
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m123MicIcon = res.getDrawable(R.drawable.sym_keyboard_123_mic);
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m123MicPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_123_mic);
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mHintIcon = res.getDrawable(R.drawable.hint_popup);
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setDefaultBounds(m123MicPreviewIcon);
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sSpacebarVerticalCorrection = res.getDimensionPixelOffset(
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R.dimen.spacebar_vertical_correction);
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final int xmlLayoutResId = id.getXmlId();
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mIsAlphaKeyboard = xmlLayoutResId == R.xml.kbd_qwerty
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|| xmlLayoutResId == R.xml.kbd_qwerty_black;
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mSpaceKeyIndex = indexOf(LatinIME.KEYCODE_SPACE);
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if (mEnterKey != null) {
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mDefaultEnterIcon = mEnterKey.icon;
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mDefaultEnterPreview = mEnterKey.iconPreview;
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mDefaultEnterLabel = mEnterKey.label;
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mDefaultEnterText = mEnterKey.text;
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} else {
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mDefaultEnterIcon = mDefaultEnterPreview = null;
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mDefaultEnterLabel = mDefaultEnterText = null;
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}
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}
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@Override
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protected Key createKeyFromXml(Resources res, Row parent, int x, int y,
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XmlResourceParser parser) {
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Key key = new LatinKey(res, parent, x, y, parser);
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switch (key.codes[0]) {
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case LatinIME.KEYCODE_ENTER:
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mEnterKey = key;
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break;
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case LatinKeyboardView.KEYCODE_F1:
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mF1Key = key;
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break;
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case LatinIME.KEYCODE_SPACE:
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mSpaceKey = key;
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break;
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case KEYCODE_MODE_CHANGE:
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m123Key = key;
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m123Label = key.label;
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break;
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}
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return key;
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}
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private static void resetKeyAttributes(Key key, CharSequence label) {
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key.popupCharacters = null;
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key.popupResId = 0;
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key.text = null;
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key.iconPreview = null;
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key.icon = null;
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key.hintIcon = null;
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key.label = label;
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}
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public void setImeOptions(Resources res, int mode, int options) {
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mMode = mode;
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if (mEnterKey == null)
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return;
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final boolean configDynamicKeyTopEnterKey = res.getBoolean(
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R.bool.config_dynamic_key_top_enter_key);
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if (configDynamicKeyTopEnterKey) {
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switch (options & (EditorInfo.IME_MASK_ACTION | EditorInfo.IME_FLAG_NO_ENTER_ACTION)) {
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case EditorInfo.IME_ACTION_GO:
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resetKeyAttributes(mEnterKey, res.getText(R.string.label_go_key));
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break;
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case EditorInfo.IME_ACTION_NEXT:
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resetKeyAttributes(mEnterKey, res.getText(R.string.label_next_key));
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break;
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case EditorInfo.IME_ACTION_DONE:
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resetKeyAttributes(mEnterKey, res.getText(R.string.label_done_key));
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break;
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case EditorInfo.IME_ACTION_SEARCH:
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resetKeyAttributes(mEnterKey, null);
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mEnterKey.iconPreview = res.getDrawable(R.drawable.sym_keyboard_feedback_search);
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mEnterKey.icon = res.getDrawable(mIsBlackSym ? R.drawable.sym_bkeyboard_search
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: R.drawable.sym_keyboard_search);
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break;
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case EditorInfo.IME_ACTION_SEND:
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resetKeyAttributes(mEnterKey, res.getText(R.string.label_send_key));
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break;
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default:
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resetKeyAttributes(mEnterKey, mDefaultEnterLabel);
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mEnterKey.text = mDefaultEnterText;
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mEnterKey.icon = mDefaultEnterIcon;
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mEnterKey.iconPreview = mDefaultEnterPreview;
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break;
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}
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}
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// Set the initial size of the preview icon
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setDefaultBounds(mEnterKey.iconPreview);
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}
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public void enableShiftLock() {
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for (final Key key : getShiftKeys()) {
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if (key instanceof LatinKey) {
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((LatinKey)key).enableShiftLock();
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}
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mOldShiftIcons.put(key, key.icon);
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}
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}
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public void setShiftLocked(boolean shiftLocked) {
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// TODO: cleanup this method with BaseKeyboard.Key
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for (final Key key : getShiftKeys()) {
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key.on = shiftLocked;
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key.icon = mShiftLockIcon;
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}
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mShiftState = shiftLocked ? SHIFT_LOCKED : SHIFT_ON;
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}
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public boolean isShiftLocked() {
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return mShiftState == SHIFT_LOCKED;
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}
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@Override
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public boolean setShifted(boolean shiftState) {
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// TODO: cleanup this method with BaseKeyboard.Key.
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boolean shiftChanged = false;
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if (getShiftKeys().size() > 0) {
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for (final Key key : getShiftKeys()) {
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if (shiftState == false) {
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key.on = false;
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key.icon = mOldShiftIcons.get(key);
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} else if (mShiftState == SHIFT_OFF) {
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key.icon = mShiftLockIcon;
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}
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}
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if (shiftState == false) {
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shiftChanged = mShiftState != SHIFT_OFF;
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mShiftState = SHIFT_OFF;
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} else if (mShiftState == SHIFT_OFF) {
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shiftChanged = mShiftState == SHIFT_OFF;
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mShiftState = SHIFT_ON;
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}
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return shiftChanged;
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} else {
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return super.setShifted(shiftState);
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}
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}
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@Override
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public boolean isShifted() {
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if (getShiftKeys().size() > 0) {
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return mShiftState != SHIFT_OFF;
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} else {
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return super.isShifted();
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}
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}
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public boolean isTemporaryUpperCase() {
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return mIsAlphaKeyboard && isShifted() && !isShiftLocked();
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}
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public boolean isAlphaKeyboard() {
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return mIsAlphaKeyboard;
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}
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public void setColorOfSymbolIcons(boolean isBlack) {
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mIsBlackSym = isBlack;
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final Resources res = mRes;
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if (isBlack) {
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mShiftLockIcon = res.getDrawable(R.drawable.sym_bkeyboard_shift_locked);
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mSpaceIcon = res.getDrawable(R.drawable.sym_bkeyboard_space);
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mMicIcon = res.getDrawable(R.drawable.sym_bkeyboard_mic);
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m123MicIcon = res.getDrawable(R.drawable.sym_bkeyboard_123_mic);
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} else {
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mShiftLockIcon = res.getDrawable(R.drawable.sym_keyboard_shift_locked);
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mSpaceIcon = res.getDrawable(R.drawable.sym_keyboard_space);
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mMicIcon = res.getDrawable(R.drawable.sym_keyboard_mic);
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m123MicIcon = res.getDrawable(R.drawable.sym_keyboard_123_mic);
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}
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updateDynamicKeys();
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}
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public void setVoiceMode(boolean hasVoiceButton, boolean hasVoice) {
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mHasVoiceButton = hasVoiceButton;
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mVoiceEnabled = hasVoice;
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updateDynamicKeys();
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}
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private void updateDynamicKeys() {
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update123Key();
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updateF1Key();
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}
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private void update123Key() {
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final boolean configDynamicKeyTopSymbolKey = mRes.getBoolean(
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R.bool.config_dynamic_key_top_symbol_key);
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// Update KEYCODE_MODE_CHANGE key only on alphabet mode, not on symbol mode.
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if (m123Key != null && mIsAlphaKeyboard) {
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if (configDynamicKeyTopSymbolKey && mVoiceEnabled && !mHasVoiceButton) {
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m123Key.icon = m123MicIcon;
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m123Key.iconPreview = m123MicPreviewIcon;
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m123Key.label = null;
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} else {
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m123Key.icon = null;
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m123Key.iconPreview = null;
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m123Key.label = m123Label;
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}
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}
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}
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private void updateF1Key() {
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// Update KEYCODE_F1 key. Please note that some keyboard layouts have no F1 key.
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if (mF1Key == null)
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return;
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if (mIsAlphaKeyboard) {
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if (mMode == KeyboardSwitcher.MODE_URL) {
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setNonMicF1Key(mF1Key, "/", R.xml.popup_slash);
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} else if (mMode == KeyboardSwitcher.MODE_EMAIL) {
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setNonMicF1Key(mF1Key, "@", R.xml.popup_at);
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} else {
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if (mVoiceEnabled && mHasVoiceButton) {
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setMicF1Key(mF1Key);
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} else {
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setNonMicF1Key(mF1Key, ",", R.xml.popup_comma);
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}
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}
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} else { // Symbols keyboard
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if (mVoiceEnabled && mHasVoiceButton) {
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setMicF1Key(mF1Key);
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} else {
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setNonMicF1Key(mF1Key, ",", R.xml.popup_comma);
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}
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}
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}
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private void setMicF1Key(Key key) {
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key.label = null;
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key.codes = new int[] { LatinKeyboardView.KEYCODE_VOICE };
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key.popupResId = R.xml.popup_mic;
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key.icon = mMicIcon;
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key.hintIcon = mHintIcon;
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key.iconPreview = mMicPreviewIcon;
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}
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private void setNonMicF1Key(Key key, String label, int popupResId) {
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key.label = label;
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key.codes = new int[] { label.charAt(0) };
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key.popupResId = popupResId;
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key.icon = null;
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key.hintIcon = mHintIcon;
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key.iconPreview = null;
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}
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/**
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* @return a key which should be invalidated.
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*/
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public Key onAutoCompletionStateChanged(boolean isAutoCompletion) {
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updateSpaceBarForLocale(isAutoCompletion, mIsBlackSym);
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return mSpaceKey;
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}
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public boolean isLanguageSwitchEnabled() {
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return mLocale != null;
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}
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private void updateSpaceBarForLocale(boolean isAutoCompletion, boolean isBlack) {
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final Resources res = mRes;
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// If application locales are explicitly selected.
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if (mLocale != null) {
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mSpaceKey.icon = new BitmapDrawable(res,
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drawSpaceBar(OPACITY_FULLY_OPAQUE, isAutoCompletion, isBlack));
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} else {
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// sym_keyboard_space_led can be shared with Black and White symbol themes.
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if (isAutoCompletion) {
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mSpaceKey.icon = new BitmapDrawable(res,
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drawSpaceBar(OPACITY_FULLY_OPAQUE, isAutoCompletion, isBlack));
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} else {
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mSpaceKey.icon = isBlack ? res.getDrawable(R.drawable.sym_bkeyboard_space)
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: res.getDrawable(R.drawable.sym_keyboard_space);
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}
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}
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}
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// Compute width of text with specified text size using paint.
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private static int getTextWidth(Paint paint, String text, float textSize, Rect bounds) {
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paint.setTextSize(textSize);
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paint.getTextBounds(text, 0, text.length(), bounds);
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return bounds.width();
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}
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// Layout local language name and left and right arrow on space bar.
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private static String layoutSpaceBar(Paint paint, Locale locale, Drawable lArrow,
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Drawable rArrow, int width, int height, float origTextSize,
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boolean allowVariableTextSize) {
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final float arrowWidth = lArrow.getIntrinsicWidth();
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final float arrowHeight = lArrow.getIntrinsicHeight();
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final float maxTextWidth = width - (arrowWidth + arrowWidth);
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final Rect bounds = new Rect();
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// Estimate appropriate language name text size to fit in maxTextWidth.
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String language = LanguageSwitcher.toTitleCase(locale.getDisplayLanguage(locale));
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int textWidth = getTextWidth(paint, language, origTextSize, bounds);
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// Assuming text width and text size are proportional to each other.
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float textSize = origTextSize * Math.min(maxTextWidth / textWidth, 1.0f);
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final boolean useShortName;
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if (allowVariableTextSize) {
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textWidth = getTextWidth(paint, language, textSize, bounds);
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// If text size goes too small or text does not fit, use short name
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useShortName = textSize / origTextSize < MINIMUM_SCALE_OF_LANGUAGE_NAME
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|| textWidth > maxTextWidth;
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} else {
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useShortName = textWidth > maxTextWidth;
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textSize = origTextSize;
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}
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if (useShortName) {
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language = LanguageSwitcher.toTitleCase(locale.getLanguage());
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textWidth = getTextWidth(paint, language, origTextSize, bounds);
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textSize = origTextSize * Math.min(maxTextWidth / textWidth, 1.0f);
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}
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paint.setTextSize(textSize);
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// Place left and right arrow just before and after language text.
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final float baseline = height * SPACEBAR_LANGUAGE_BASELINE;
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final int top = (int)(baseline - arrowHeight);
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final float remains = (width - textWidth) / 2;
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lArrow.setBounds((int)(remains - arrowWidth), top, (int)remains, (int)baseline);
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rArrow.setBounds((int)(remains + textWidth), top, (int)(remains + textWidth + arrowWidth),
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(int)baseline);
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return language;
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}
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private Bitmap drawSpaceBar(int opacity, boolean isAutoCompletion, boolean isBlack) {
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final int width = mSpaceKey.width;
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final int height = mSpaceIcon.getIntrinsicHeight();
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final Bitmap buffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
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final Canvas canvas = new Canvas(buffer);
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final Resources res = mRes;
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canvas.drawColor(res.getColor(R.color.latinkeyboard_transparent), PorterDuff.Mode.CLEAR);
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// If application locales are explicitly selected.
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if (mLocale != null) {
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final Paint paint = new Paint();
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paint.setAlpha(opacity);
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paint.setAntiAlias(true);
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paint.setTextAlign(Align.CENTER);
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final boolean allowVariableTextSize = true;
|
|
final String language = layoutSpaceBar(paint, mLanguageSwitcher.getInputLocale(),
|
|
mButtonArrowLeftIcon, mButtonArrowRightIcon, width, height,
|
|
getTextSizeFromTheme(android.R.style.TextAppearance_Small, 14),
|
|
allowVariableTextSize);
|
|
|
|
// Draw language text with shadow
|
|
final int shadowColor = res.getColor(isBlack
|
|
? R.color.latinkeyboard_bar_language_shadow_black
|
|
: R.color.latinkeyboard_bar_language_shadow_white);
|
|
final float baseline = height * SPACEBAR_LANGUAGE_BASELINE;
|
|
final float descent = paint.descent();
|
|
paint.setColor(shadowColor);
|
|
canvas.drawText(language, width / 2, baseline - descent - 1, paint);
|
|
paint.setColor(res.getColor(R.color.latinkeyboard_bar_language_text));
|
|
canvas.drawText(language, width / 2, baseline - descent, paint);
|
|
|
|
// Put arrows that are already layed out on either side of the text
|
|
if (mLanguageSwitcher.getLocaleCount() > 1) {
|
|
mButtonArrowLeftIcon.draw(canvas);
|
|
mButtonArrowRightIcon.draw(canvas);
|
|
}
|
|
}
|
|
|
|
// Draw the spacebar icon at the bottom
|
|
if (isAutoCompletion) {
|
|
final int iconWidth = width * SPACE_LED_LENGTH_PERCENT / 100;
|
|
final int iconHeight = mSpaceAutoCompletionIndicator.getIntrinsicHeight();
|
|
int x = (width - iconWidth) / 2;
|
|
int y = height - iconHeight;
|
|
mSpaceAutoCompletionIndicator.setBounds(x, y, x + iconWidth, y + iconHeight);
|
|
mSpaceAutoCompletionIndicator.draw(canvas);
|
|
} else {
|
|
final int iconWidth = mSpaceIcon.getIntrinsicWidth();
|
|
final int iconHeight = mSpaceIcon.getIntrinsicHeight();
|
|
int x = (width - iconWidth) / 2;
|
|
int y = height - iconHeight;
|
|
mSpaceIcon.setBounds(x, y, x + iconWidth, y + iconHeight);
|
|
mSpaceIcon.draw(canvas);
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
private void updateLocaleDrag(int diff) {
|
|
if (mSlidingLocaleIcon == null) {
|
|
final int width = Math.max(mSpaceKey.width,
|
|
(int)(getMinWidth() * SPACEBAR_POPUP_MIN_RATIO));
|
|
final int height = mSpacePreviewIcon.getIntrinsicHeight();
|
|
mSlidingLocaleIcon = new SlidingLocaleDrawable(mSpacePreviewIcon, width, height);
|
|
mSlidingLocaleIcon.setBounds(0, 0, width, height);
|
|
mSpaceKey.iconPreview = mSlidingLocaleIcon;
|
|
}
|
|
mSlidingLocaleIcon.setDiff(diff);
|
|
if (Math.abs(diff) == Integer.MAX_VALUE) {
|
|
mSpaceKey.iconPreview = mSpacePreviewIcon;
|
|
} else {
|
|
mSpaceKey.iconPreview = mSlidingLocaleIcon;
|
|
}
|
|
mSpaceKey.iconPreview.invalidateSelf();
|
|
}
|
|
|
|
public int getLanguageChangeDirection() {
|
|
if (mSpaceKey == null || mLanguageSwitcher.getLocaleCount() < 2
|
|
|| Math.abs(mSpaceDragLastDiff) < mSpaceKey.width * SPACEBAR_DRAG_THRESHOLD ) {
|
|
return 0; // No change
|
|
}
|
|
return mSpaceDragLastDiff > 0 ? 1 : -1;
|
|
}
|
|
|
|
public void setLanguageSwitcher(LanguageSwitcher switcher) {
|
|
mLanguageSwitcher = switcher;
|
|
Locale locale = mLanguageSwitcher.getLocaleCount() > 0
|
|
? mLanguageSwitcher.getInputLocale()
|
|
: null;
|
|
// If the language count is 1 and is the same as the system language, don't show it.
|
|
if (locale != null
|
|
&& mLanguageSwitcher.getLocaleCount() == 1
|
|
&& mLanguageSwitcher.getSystemLocale().getLanguage()
|
|
.equalsIgnoreCase(locale.getLanguage())) {
|
|
locale = null;
|
|
}
|
|
mLocale = locale;
|
|
}
|
|
|
|
boolean isCurrentlyInSpace() {
|
|
return mCurrentlyInSpace;
|
|
}
|
|
|
|
public void setPreferredLetters(int[] frequencies) {
|
|
mPrefLetterFrequencies = frequencies;
|
|
mPrefLetter = 0;
|
|
}
|
|
|
|
public void keyReleased() {
|
|
mCurrentlyInSpace = false;
|
|
mSpaceDragLastDiff = 0;
|
|
mPrefLetter = 0;
|
|
mPrefLetterX = 0;
|
|
mPrefLetterY = 0;
|
|
mPrefDistance = Integer.MAX_VALUE;
|
|
if (mSpaceKey != null) {
|
|
updateLocaleDrag(Integer.MAX_VALUE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Does the magic of locking the touch gesture into the spacebar when
|
|
* switching input languages.
|
|
*/
|
|
public boolean isInside(LatinKey key, int x, int y) {
|
|
final int code = key.codes[0];
|
|
if (code == KEYCODE_SHIFT || code == KEYCODE_DELETE) {
|
|
y -= key.height / 10;
|
|
if (code == KEYCODE_SHIFT) x += key.width / 6;
|
|
if (code == KEYCODE_DELETE) x -= key.width / 6;
|
|
} else if (code == LatinIME.KEYCODE_SPACE) {
|
|
y += LatinKeyboard.sSpacebarVerticalCorrection;
|
|
if (mLanguageSwitcher.getLocaleCount() > 1) {
|
|
if (mCurrentlyInSpace) {
|
|
int diff = x - mSpaceDragStartX;
|
|
if (Math.abs(diff - mSpaceDragLastDiff) > 0) {
|
|
updateLocaleDrag(diff);
|
|
}
|
|
mSpaceDragLastDiff = diff;
|
|
return true;
|
|
} else {
|
|
boolean insideSpace = key.isInsideSuper(x, y);
|
|
if (insideSpace) {
|
|
mCurrentlyInSpace = true;
|
|
mSpaceDragStartX = x;
|
|
updateLocaleDrag(0);
|
|
}
|
|
return insideSpace;
|
|
}
|
|
}
|
|
} else if (mPrefLetterFrequencies != null) {
|
|
// New coordinate? Reset
|
|
if (mPrefLetterX != x || mPrefLetterY != y) {
|
|
mPrefLetter = 0;
|
|
mPrefDistance = Integer.MAX_VALUE;
|
|
}
|
|
// Handle preferred next letter
|
|
final int[] pref = mPrefLetterFrequencies;
|
|
if (mPrefLetter > 0) {
|
|
if (DEBUG_PREFERRED_LETTER) {
|
|
if (mPrefLetter == code && !key.isInsideSuper(x, y)) {
|
|
Log.d(TAG, "CORRECTED !!!!!!");
|
|
}
|
|
}
|
|
return mPrefLetter == code;
|
|
} else {
|
|
final boolean inside = key.isInsideSuper(x, y);
|
|
int[] nearby = getNearestKeys(x, y);
|
|
List<Key> nearbyKeys = getKeys();
|
|
if (inside) {
|
|
// If it's a preferred letter
|
|
if (inPrefList(code, pref)) {
|
|
// Check if its frequency is much lower than a nearby key
|
|
mPrefLetter = code;
|
|
mPrefLetterX = x;
|
|
mPrefLetterY = y;
|
|
for (int i = 0; i < nearby.length; i++) {
|
|
Key k = nearbyKeys.get(nearby[i]);
|
|
if (k != key && inPrefList(k.codes[0], pref)) {
|
|
final int dist = distanceFrom(k, x, y);
|
|
if (dist < (int) (k.width * OVERLAP_PERCENTAGE_LOW_PROB) &&
|
|
(pref[k.codes[0]] > pref[mPrefLetter] * 3)) {
|
|
mPrefLetter = k.codes[0];
|
|
mPrefDistance = dist;
|
|
if (DEBUG_PREFERRED_LETTER) {
|
|
Log.d(TAG, "CORRECTED ALTHOUGH PREFERRED !!!!!!");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return mPrefLetter == code;
|
|
}
|
|
}
|
|
|
|
// Get the surrounding keys and intersect with the preferred list
|
|
// For all in the intersection
|
|
// if distance from touch point is within a reasonable distance
|
|
// make this the pref letter
|
|
// If no pref letter
|
|
// return inside;
|
|
// else return thiskey == prefletter;
|
|
|
|
for (int i = 0; i < nearby.length; i++) {
|
|
Key k = nearbyKeys.get(nearby[i]);
|
|
if (inPrefList(k.codes[0], pref)) {
|
|
final int dist = distanceFrom(k, x, y);
|
|
if (dist < (int) (k.width * OVERLAP_PERCENTAGE_HIGH_PROB)
|
|
&& dist < mPrefDistance) {
|
|
mPrefLetter = k.codes[0];
|
|
mPrefLetterX = x;
|
|
mPrefLetterY = y;
|
|
mPrefDistance = dist;
|
|
}
|
|
}
|
|
}
|
|
// Didn't find any
|
|
if (mPrefLetter == 0) {
|
|
return inside;
|
|
} else {
|
|
return mPrefLetter == code;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Lock into the spacebar
|
|
if (mCurrentlyInSpace) return false;
|
|
|
|
return key.isInsideSuper(x, y);
|
|
}
|
|
|
|
private boolean inPrefList(int code, int[] pref) {
|
|
if (code < pref.length && code >= 0) return pref[code] > 0;
|
|
return false;
|
|
}
|
|
|
|
private int distanceFrom(Key k, int x, int y) {
|
|
if (y > k.y && y < k.y + k.height) {
|
|
return Math.abs(k.x + k.width / 2 - x);
|
|
} else {
|
|
return Integer.MAX_VALUE;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int[] getNearestKeys(int x, int y) {
|
|
if (mCurrentlyInSpace) {
|
|
return new int[] { mSpaceKeyIndex };
|
|
} else {
|
|
// Avoid dead pixels at edges of the keyboard
|
|
return super.getNearestKeys(Math.max(0, Math.min(x, getMinWidth() - 1)),
|
|
Math.max(0, Math.min(y, getHeight() - 1)));
|
|
}
|
|
}
|
|
|
|
private int indexOf(int code) {
|
|
List<Key> keys = getKeys();
|
|
int count = keys.size();
|
|
for (int i = 0; i < count; i++) {
|
|
if (keys.get(i).codes[0] == code) return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
private int getTextSizeFromTheme(int style, int defValue) {
|
|
TypedArray array = mContext.getTheme().obtainStyledAttributes(
|
|
style, new int[] { android.R.attr.textSize });
|
|
int textSize = array.getDimensionPixelSize(array.getResourceId(0, 0), defValue);
|
|
return textSize;
|
|
}
|
|
|
|
public static class LatinKey extends BaseKeyboard.Key {
|
|
|
|
// functional normal state (with properties)
|
|
private final int[] KEY_STATE_FUNCTIONAL_NORMAL = {
|
|
android.R.attr.state_single
|
|
};
|
|
|
|
// functional pressed state (with properties)
|
|
private final int[] KEY_STATE_FUNCTIONAL_PRESSED = {
|
|
android.R.attr.state_single,
|
|
android.R.attr.state_pressed
|
|
};
|
|
|
|
private boolean mShiftLockEnabled;
|
|
|
|
public LatinKey(Resources res, BaseKeyboard.Row parent, int x, int y,
|
|
XmlResourceParser parser) {
|
|
super(res, parent, x, y, parser);
|
|
if (popupCharacters != null && popupCharacters.length() == 0) {
|
|
// If there is a keyboard with no keys specified in popupCharacters
|
|
popupResId = 0;
|
|
}
|
|
}
|
|
|
|
private void enableShiftLock() {
|
|
mShiftLockEnabled = true;
|
|
}
|
|
|
|
// sticky is used for shift key. If a key is not sticky and is modifier,
|
|
// the key will be treated as functional.
|
|
private boolean isFunctionalKey() {
|
|
return !sticky && modifier;
|
|
}
|
|
|
|
@Override
|
|
public void onReleased(boolean inside) {
|
|
if (!mShiftLockEnabled) {
|
|
super.onReleased(inside);
|
|
} else {
|
|
pressed = !pressed;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Overriding this method so that we can reduce the target area for certain keys.
|
|
*/
|
|
@Override
|
|
public boolean isInside(int x, int y) {
|
|
boolean result = (keyboard instanceof LatinKeyboard)
|
|
&& ((LatinKeyboard)keyboard).isInside(this, x, y);
|
|
return result;
|
|
}
|
|
|
|
private boolean isInsideSuper(int x, int y) {
|
|
return super.isInside(x, y);
|
|
}
|
|
|
|
@Override
|
|
public int[] getCurrentDrawableState() {
|
|
if (isFunctionalKey()) {
|
|
if (pressed) {
|
|
return KEY_STATE_FUNCTIONAL_PRESSED;
|
|
} else {
|
|
return KEY_STATE_FUNCTIONAL_NORMAL;
|
|
}
|
|
}
|
|
return super.getCurrentDrawableState();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Animation to be displayed on the spacebar preview popup when switching
|
|
* languages by swiping the spacebar. It draws the current, previous and
|
|
* next languages and moves them by the delta of touch movement on the spacebar.
|
|
*/
|
|
private class SlidingLocaleDrawable extends Drawable {
|
|
|
|
private final int mWidth;
|
|
private final int mHeight;
|
|
private final Drawable mBackground;
|
|
private final TextPaint mTextPaint;
|
|
private final int mMiddleX;
|
|
private final Drawable mLeftDrawable;
|
|
private final Drawable mRightDrawable;
|
|
private final int mThreshold;
|
|
private int mDiff;
|
|
private boolean mHitThreshold;
|
|
private String mCurrentLanguage;
|
|
private String mNextLanguage;
|
|
private String mPrevLanguage;
|
|
|
|
public SlidingLocaleDrawable(Drawable background, int width, int height) {
|
|
mBackground = background;
|
|
setDefaultBounds(mBackground);
|
|
mWidth = width;
|
|
mHeight = height;
|
|
final TextPaint textPaint = new TextPaint();
|
|
textPaint.setTextSize(getTextSizeFromTheme(android.R.style.TextAppearance_Medium, 18));
|
|
textPaint.setColor(R.color.latinkeyboard_transparent);
|
|
textPaint.setTextAlign(Align.CENTER);
|
|
textPaint.setAlpha(OPACITY_FULLY_OPAQUE);
|
|
textPaint.setAntiAlias(true);
|
|
mTextPaint = textPaint;
|
|
mMiddleX = (mWidth - mBackground.getIntrinsicWidth()) / 2;
|
|
final Resources res = mRes;
|
|
mLeftDrawable = res.getDrawable(
|
|
R.drawable.sym_keyboard_feedback_language_arrows_left);
|
|
mRightDrawable = res.getDrawable(
|
|
R.drawable.sym_keyboard_feedback_language_arrows_right);
|
|
mThreshold = ViewConfiguration.get(mContext).getScaledTouchSlop();
|
|
}
|
|
|
|
private void setDiff(int diff) {
|
|
if (diff == Integer.MAX_VALUE) {
|
|
mHitThreshold = false;
|
|
mCurrentLanguage = null;
|
|
return;
|
|
}
|
|
mDiff = diff;
|
|
if (mDiff > mWidth) mDiff = mWidth;
|
|
if (mDiff < -mWidth) mDiff = -mWidth;
|
|
if (Math.abs(mDiff) > mThreshold) mHitThreshold = true;
|
|
invalidateSelf();
|
|
}
|
|
|
|
private String getLanguageName(Locale locale) {
|
|
return LanguageSwitcher.toTitleCase(locale.getDisplayLanguage(locale));
|
|
}
|
|
|
|
@Override
|
|
public void draw(Canvas canvas) {
|
|
canvas.save();
|
|
if (mHitThreshold) {
|
|
Paint paint = mTextPaint;
|
|
final int width = mWidth;
|
|
final int height = mHeight;
|
|
final int diff = mDiff;
|
|
final Drawable lArrow = mLeftDrawable;
|
|
final Drawable rArrow = mRightDrawable;
|
|
canvas.clipRect(0, 0, width, height);
|
|
if (mCurrentLanguage == null) {
|
|
final LanguageSwitcher languageSwitcher = mLanguageSwitcher;
|
|
mCurrentLanguage = getLanguageName(languageSwitcher.getInputLocale());
|
|
mNextLanguage = getLanguageName(languageSwitcher.getNextInputLocale());
|
|
mPrevLanguage = getLanguageName(languageSwitcher.getPrevInputLocale());
|
|
}
|
|
// Draw language text with shadow
|
|
final float baseline = mHeight * SPACEBAR_LANGUAGE_BASELINE - paint.descent();
|
|
paint.setColor(mRes.getColor(R.color.latinkeyboard_feedback_language_text));
|
|
canvas.drawText(mCurrentLanguage, width / 2 + diff, baseline, paint);
|
|
canvas.drawText(mNextLanguage, diff - width / 2, baseline, paint);
|
|
canvas.drawText(mPrevLanguage, diff + width + width / 2, baseline, paint);
|
|
|
|
setDefaultBounds(lArrow);
|
|
rArrow.setBounds(width - rArrow.getIntrinsicWidth(), 0, width,
|
|
rArrow.getIntrinsicHeight());
|
|
lArrow.draw(canvas);
|
|
rArrow.draw(canvas);
|
|
}
|
|
if (mBackground != null) {
|
|
canvas.translate(mMiddleX, 0);
|
|
mBackground.draw(canvas);
|
|
}
|
|
canvas.restore();
|
|
}
|
|
|
|
@Override
|
|
public int getOpacity() {
|
|
return PixelFormat.TRANSLUCENT;
|
|
}
|
|
|
|
@Override
|
|
public void setAlpha(int alpha) {
|
|
// Ignore
|
|
}
|
|
|
|
@Override
|
|
public void setColorFilter(ColorFilter cf) {
|
|
// Ignore
|
|
}
|
|
|
|
@Override
|
|
public int getIntrinsicWidth() {
|
|
return mWidth;
|
|
}
|
|
|
|
@Override
|
|
public int getIntrinsicHeight() {
|
|
return mHeight;
|
|
}
|
|
}
|
|
}
|