555 lines
22 KiB
Java
555 lines
22 KiB
Java
/*
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* Copyright (C) 2010 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.graphics.Color;
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import android.graphics.Typeface;
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import android.os.Handler;
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import android.os.Message;
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import android.text.Spannable;
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import android.text.SpannableString;
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import android.text.Spanned;
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import android.text.TextUtils;
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import android.text.style.BackgroundColorSpan;
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import android.text.style.CharacterStyle;
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import android.text.style.ForegroundColorSpan;
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import android.text.style.StyleSpan;
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import android.text.style.UnderlineSpan;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.View.OnLongClickListener;
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import android.view.ViewGroup;
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import android.widget.ImageView;
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import android.widget.LinearLayout;
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import android.widget.PopupWindow;
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import android.widget.TextView;
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import com.android.inputmethod.compat.FrameLayoutCompatUtils;
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import com.android.inputmethod.compat.LinearLayoutCompatUtils;
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import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
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import java.util.ArrayList;
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import java.util.List;
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public class CandidateView extends LinearLayout implements OnClickListener, OnLongClickListener {
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public interface Listener {
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public boolean addWordToDictionary(String word);
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public void pickSuggestionManually(int index, CharSequence word);
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}
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private static final CharacterStyle BOLD_SPAN = new StyleSpan(Typeface.BOLD);
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private static final CharacterStyle UNDERLINE_SPAN = new UnderlineSpan();
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// The maximum number of suggestions available. See {@link Suggest#mPrefMaxSuggestions}.
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private static final int MAX_SUGGESTIONS = 18;
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private static final int UNSPECIFIED_MEASURESPEC = MeasureSpec.makeMeasureSpec(
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0, MeasureSpec.UNSPECIFIED);
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private static final boolean DBG = LatinImeLogger.sDBG;
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private static final int NUM_CANDIDATES_IN_STRIP = 3;
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private final ImageView mExpandCandidatesPane;
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private final ImageView mCloseCandidatesPane;
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private ViewGroup mCandidatesPane;
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private ViewGroup mCandidatesPaneContainer;
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private View mKeyboardView;
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private final ArrayList<TextView> mWords = new ArrayList<TextView>();
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private final ArrayList<TextView> mInfos = new ArrayList<TextView>();
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private final ArrayList<View> mDividers = new ArrayList<View>();
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private final int mCandidatePadding;
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private final int mCandidateStripHeight;
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private final CharacterStyle mInvertedForegroundColorSpan;
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private final CharacterStyle mInvertedBackgroundColorSpan;
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private final int mAutoCorrectHighlight;
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private static final int AUTO_CORRECT_BOLD = 0x01;
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private static final int AUTO_CORRECT_UNDERLINE = 0x02;
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private static final int AUTO_CORRECT_INVERT = 0x04;
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private final int mColorTypedWord;
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private final int mColorAutoCorrect;
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private final int mColorSuggestedCandidate;
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private final PopupWindow mPreviewPopup;
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private final TextView mPreviewText;
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private Listener mListener;
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private SuggestedWords mSuggestions = SuggestedWords.EMPTY;
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private boolean mShowingAutoCorrectionInverted;
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private boolean mShowingAddToDictionary;
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private final UiHandler mHandler = new UiHandler();
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private class UiHandler extends Handler {
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private static final int MSG_HIDE_PREVIEW = 0;
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private static final int MSG_UPDATE_SUGGESTION = 1;
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private static final long DELAY_HIDE_PREVIEW = 1000;
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private static final long DELAY_UPDATE_SUGGESTION = 300;
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@Override
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public void dispatchMessage(Message msg) {
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switch (msg.what) {
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case MSG_HIDE_PREVIEW:
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hidePreview();
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break;
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case MSG_UPDATE_SUGGESTION:
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updateSuggestions();
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break;
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}
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}
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public void postHidePreview() {
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cancelHidePreview();
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sendMessageDelayed(obtainMessage(MSG_HIDE_PREVIEW), DELAY_HIDE_PREVIEW);
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}
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public void cancelHidePreview() {
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removeMessages(MSG_HIDE_PREVIEW);
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}
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public void postUpdateSuggestions() {
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cancelUpdateSuggestions();
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sendMessageDelayed(obtainMessage(MSG_UPDATE_SUGGESTION),
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DELAY_UPDATE_SUGGESTION);
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}
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public void cancelUpdateSuggestions() {
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removeMessages(MSG_UPDATE_SUGGESTION);
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}
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public void cancelAllMessages() {
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cancelHidePreview();
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cancelUpdateSuggestions();
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}
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}
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/**
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* Construct a CandidateView for showing suggested words for completion.
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* @param context
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* @param attrs
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*/
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public CandidateView(Context context, AttributeSet attrs) {
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this(context, attrs, R.attr.candidateViewStyle);
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}
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public CandidateView(Context context, AttributeSet attrs, int defStyle) {
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// Note: Up to version 10 (Gingerbread) of the API, LinearLayout doesn't have 3-argument
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// constructor.
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// TODO: Call 3-argument constructor, super(context, attrs, defStyle), when we abandon
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// backward compatibility with the version 10 or earlier of the API.
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super(context, attrs);
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if (defStyle != R.attr.candidateViewStyle) {
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throw new IllegalArgumentException(
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"can't accept defStyle other than R.attr.candidayeViewStyle: defStyle="
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+ defStyle);
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}
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setBackgroundDrawable(LinearLayoutCompatUtils.getBackgroundDrawable(
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context, attrs, defStyle, R.style.CandidateViewStyle));
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Resources res = context.getResources();
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LayoutInflater inflater = LayoutInflater.from(context);
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inflater.inflate(R.layout.candidates_strip, this);
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mPreviewPopup = new PopupWindow(context);
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mPreviewText = (TextView) inflater.inflate(R.layout.candidate_preview, null);
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mPreviewPopup.setWindowLayoutMode(ViewGroup.LayoutParams.WRAP_CONTENT,
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ViewGroup.LayoutParams.WRAP_CONTENT);
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mPreviewPopup.setContentView(mPreviewText);
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mPreviewPopup.setBackgroundDrawable(null);
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mCandidatePadding = res.getDimensionPixelOffset(R.dimen.candidate_padding);
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mCandidateStripHeight = res.getDimensionPixelOffset(R.dimen.candidate_strip_height);
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for (int i = 0; i < MAX_SUGGESTIONS; i++) {
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final TextView word, info;
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switch (i) {
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case 0:
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word = (TextView)findViewById(R.id.word_left);
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word.setPadding(mCandidatePadding, 0, 0, 0);
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info = (TextView)findViewById(R.id.info_left);
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break;
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case 1:
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word = (TextView)findViewById(R.id.word_center);
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info = (TextView)findViewById(R.id.info_center);
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break;
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case 2:
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word = (TextView)findViewById(R.id.word_right);
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info = (TextView)findViewById(R.id.info_right);
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break;
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default:
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word = (TextView)inflater.inflate(R.layout.candidate_word, null);
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info = (TextView)inflater.inflate(R.layout.candidate_info, null);
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break;
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}
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word.setTag(i);
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word.setOnClickListener(this);
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if (i == 0)
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word.setOnLongClickListener(this);
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mWords.add(word);
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mInfos.add(info);
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if (i > 0) {
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final View divider = inflater.inflate(R.layout.candidate_divider, null);
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divider.measure(UNSPECIFIED_MEASURESPEC, UNSPECIFIED_MEASURESPEC);
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mDividers.add(divider);
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}
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}
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final TypedArray a = context.obtainStyledAttributes(
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attrs, R.styleable.CandidateView, defStyle, R.style.CandidateViewStyle);
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mAutoCorrectHighlight = a.getInt(R.styleable.CandidateView_autoCorrectHighlight, 0);
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mColorTypedWord = a.getColor(R.styleable.CandidateView_colorTypedWord, 0);
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mColorAutoCorrect = a.getColor(R.styleable.CandidateView_colorAutoCorrect, 0);
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mColorSuggestedCandidate = a.getColor(R.styleable.CandidateView_colorSuggested, 0);
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mInvertedForegroundColorSpan = new ForegroundColorSpan(mColorTypedWord ^ 0x00ffffff);
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mInvertedBackgroundColorSpan = new BackgroundColorSpan(mColorTypedWord);
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mExpandCandidatesPane = (ImageView)findViewById(R.id.expand_candidates_pane);
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mExpandCandidatesPane.setImageDrawable(
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a.getDrawable(R.styleable.CandidateView_iconExpandPane));
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mExpandCandidatesPane.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View view) {
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expandCandidatesPane();
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}
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});
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mCloseCandidatesPane = (ImageView)findViewById(R.id.close_candidates_pane);
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mCloseCandidatesPane.setImageDrawable(
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a.getDrawable(R.styleable.CandidateView_iconClosePane));
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mCloseCandidatesPane.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View view) {
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closeCandidatesPane();
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}
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});
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a.recycle();
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}
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/**
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* A connection back to the input method.
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* @param listener
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*/
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public void setListener(Listener listener, View inputView) {
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mListener = listener;
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mKeyboardView = inputView.findViewById(R.id.keyboard_view);
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mCandidatesPane = FrameLayoutCompatUtils.getPlacer(
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(ViewGroup)inputView.findViewById(R.id.candidates_pane));
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mCandidatesPane.setOnClickListener(this);
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mCandidatesPaneContainer = (ViewGroup)inputView.findViewById(
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R.id.candidates_pane_container);
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}
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public void setSuggestions(SuggestedWords suggestions) {
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if (suggestions == null)
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return;
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mSuggestions = suggestions;
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if (mShowingAutoCorrectionInverted) {
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mHandler.postUpdateSuggestions();
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} else {
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updateSuggestions();
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}
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}
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private CharSequence getStyledCandidateWord(CharSequence word, boolean isAutoCorrect) {
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if (!isAutoCorrect)
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return word;
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final Spannable spannedWord = new SpannableString(word);
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if ((mAutoCorrectHighlight & AUTO_CORRECT_BOLD) != 0)
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spannedWord.setSpan(BOLD_SPAN, 0, word.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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if ((mAutoCorrectHighlight & AUTO_CORRECT_UNDERLINE) != 0)
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spannedWord.setSpan(UNDERLINE_SPAN, 0, word.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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return spannedWord;
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}
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private int getCandidateTextColor(boolean isAutoCorrect, boolean isSuggestedCandidate,
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SuggestedWordInfo info) {
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final int color;
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if (isAutoCorrect) {
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color = mColorAutoCorrect;
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} else if (isSuggestedCandidate) {
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color = mColorSuggestedCandidate;
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} else {
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color = mColorTypedWord;
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}
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if (info != null && info.isPreviousSuggestedWord()) {
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final int newAlpha = (int)(Color.alpha(color) * 0.5f);
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return Color.argb(newAlpha, Color.red(color), Color.green(color), Color.blue(color));
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} else {
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return color;
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}
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}
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private void updateSuggestions() {
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final SuggestedWords suggestions = mSuggestions;
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final List<SuggestedWordInfo> suggestedWordInfoList = suggestions.mSuggestedWordInfoList;
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clear();
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final int paneWidth = getWidth();
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final int dividerWidth = mDividers.get(0).getMeasuredWidth();
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final int dividerHeight = mDividers.get(0).getMeasuredHeight();
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int x = 0;
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int y = 0;
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int fromIndex = NUM_CANDIDATES_IN_STRIP;
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final int count = Math.min(mWords.size(), suggestions.size());
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closeCandidatesPane();
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mExpandCandidatesPane.setEnabled(count >= NUM_CANDIDATES_IN_STRIP);
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for (int i = 0; i < count; i++) {
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final CharSequence suggestion = suggestions.getWord(i);
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if (suggestion == null) continue;
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final SuggestedWordInfo suggestionInfo = (suggestedWordInfoList != null)
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? suggestedWordInfoList.get(i) : null;
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final boolean isAutoCorrect = suggestions.mHasMinimalSuggestion
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&& ((i == 1 && !suggestions.mTypedWordValid)
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|| (i == 0 && suggestions.mTypedWordValid));
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// HACK: even if i == 0, we use mColorOther when this suggestion's length is 1
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// and there are multiple suggestions, such as the default punctuation list.
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// TODO: Need to revisit this logic with bigram suggestions
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final boolean isSuggestedCandidate = (i != 0);
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final boolean isPunctuationSuggestions = (suggestion.length() == 1 && count > 1);
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final TextView word = mWords.get(i);
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// TODO: Reorder candidates in strip as appropriate. The center candidate should hold
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// the word when space is typed (valid typed word or auto corrected word).
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word.setTextColor(getCandidateTextColor(isAutoCorrect,
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isSuggestedCandidate || isPunctuationSuggestions, suggestionInfo));
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word.setText(getStyledCandidateWord(suggestion, isAutoCorrect));
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// TODO: call TextView.setTextScaleX() to fit the candidate in single line.
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word.measure(UNSPECIFIED_MEASURESPEC, UNSPECIFIED_MEASURESPEC);
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final int width = word.getMeasuredWidth();
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final int height = word.getMeasuredHeight();
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final TextView info;
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if (DBG && suggestionInfo != null
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&& !TextUtils.isEmpty(suggestionInfo.getDebugString())) {
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info = mInfos.get(i);
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info.setText(suggestionInfo.getDebugString());
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info.setVisibility(View.VISIBLE);
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info.measure(UNSPECIFIED_MEASURESPEC, UNSPECIFIED_MEASURESPEC);
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} else {
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info = null;
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}
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if (i < NUM_CANDIDATES_IN_STRIP) {
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if (info != null) {
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final int infoWidth = info.getMeasuredWidth();
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FrameLayoutCompatUtils.placeViewAt(
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info, x + width - infoWidth, y, infoWidth, info.getMeasuredHeight());
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}
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} else {
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// TODO: Handle overflow case.
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if (dividerWidth + x + width >= paneWidth) {
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centeringCandidates(fromIndex, i - 1, x, paneWidth);
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x = 0;
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y += mCandidateStripHeight;
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fromIndex = i;
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}
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if (x != 0) {
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final View divider = mDividers.get(i - NUM_CANDIDATES_IN_STRIP);
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mCandidatesPane.addView(divider);
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FrameLayoutCompatUtils.placeViewAt(
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divider, x, y + (mCandidateStripHeight - dividerHeight) / 2,
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dividerWidth, dividerHeight);
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x += dividerWidth;
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}
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mCandidatesPane.addView(word);
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FrameLayoutCompatUtils.placeViewAt(
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word, x, y + (mCandidateStripHeight - height) / 2, width, height);
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if (info != null) {
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mCandidatesPane.addView(info);
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final int infoWidth = info.getMeasuredWidth();
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FrameLayoutCompatUtils.placeViewAt(
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info, x + width - infoWidth, y, infoWidth, info.getMeasuredHeight());
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}
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x += width;
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}
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}
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if (x != 0) {
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// Centering last candidates row.
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centeringCandidates(fromIndex, count - 1, x, paneWidth);
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}
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}
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private void centeringCandidates(int from, int to, int width, int paneWidth) {
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final ViewGroup pane = mCandidatesPane;
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final int fromIndex = pane.indexOfChild(mWords.get(from));
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final int toIndex;
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if (mInfos.get(to).getParent() != null) {
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toIndex = pane.indexOfChild(mInfos.get(to));
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} else {
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toIndex = pane.indexOfChild(mWords.get(to));
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}
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final int offset = (paneWidth - width) / 2;
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for (int index = fromIndex; index <= toIndex; index++) {
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offsetMargin(pane.getChildAt(index), offset, 0);
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}
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}
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private static void offsetMargin(View v, int dx, int dy) {
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if (v == null)
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return;
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final ViewGroup.LayoutParams lp = v.getLayoutParams();
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if (lp instanceof ViewGroup.MarginLayoutParams) {
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final ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams)lp;
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mlp.setMargins(mlp.leftMargin + dx, mlp.topMargin + dy, 0, 0);
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}
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}
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private void expandCandidatesPane() {
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mExpandCandidatesPane.setVisibility(View.GONE);
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mCloseCandidatesPane.setVisibility(View.VISIBLE);
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mCandidatesPaneContainer.setMinimumHeight(mKeyboardView.getMeasuredHeight());
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mCandidatesPaneContainer.setVisibility(View.VISIBLE);
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mKeyboardView.setVisibility(View.GONE);
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}
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private void closeCandidatesPane() {
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mExpandCandidatesPane.setVisibility(View.VISIBLE);
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mCloseCandidatesPane.setVisibility(View.GONE);
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mCandidatesPaneContainer.setVisibility(View.GONE);
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mKeyboardView.setVisibility(View.VISIBLE);
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}
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public void onAutoCorrectionInverted(CharSequence autoCorrectedWord) {
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if ((mAutoCorrectHighlight & AUTO_CORRECT_INVERT) == 0)
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return;
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final TextView tv = mWords.get(1);
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final Spannable word = new SpannableString(autoCorrectedWord);
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final int wordLength = word.length();
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word.setSpan(mInvertedBackgroundColorSpan, 0, wordLength,
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Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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word.setSpan(mInvertedForegroundColorSpan, 0, wordLength,
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Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
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tv.setText(word);
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mShowingAutoCorrectionInverted = true;
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}
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public boolean isShowingAddToDictionaryHint() {
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return mShowingAddToDictionary;
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}
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public void showAddToDictionaryHint(CharSequence word) {
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SuggestedWords.Builder builder = new SuggestedWords.Builder()
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.addWord(word)
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.addWord(getContext().getText(R.string.hint_add_to_dictionary));
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setSuggestions(builder.build());
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mShowingAddToDictionary = true;
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// Disable R.string.hint_add_to_dictionary button
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TextView tv = mWords.get(1);
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tv.setClickable(false);
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}
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public boolean dismissAddToDictionaryHint() {
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if (!mShowingAddToDictionary) return false;
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clear();
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return true;
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}
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public SuggestedWords getSuggestions() {
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return mSuggestions;
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}
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public void clear() {
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mShowingAddToDictionary = false;
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mShowingAutoCorrectionInverted = false;
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for (int i = 0; i < NUM_CANDIDATES_IN_STRIP; i++) {
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mWords.get(i).setText(null);
|
|
mInfos.get(i).setVisibility(View.GONE);
|
|
}
|
|
mCandidatesPane.removeAllViews();
|
|
}
|
|
|
|
private void hidePreview() {
|
|
mPreviewPopup.dismiss();
|
|
}
|
|
|
|
private void showPreview(int index, CharSequence word) {
|
|
if (TextUtils.isEmpty(word))
|
|
return;
|
|
|
|
final TextView previewText = mPreviewText;
|
|
previewText.setTextColor(mColorTypedWord);
|
|
previewText.setText(word);
|
|
previewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
|
|
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
|
|
View v = mWords.get(index);
|
|
final int[] offsetInWindow = new int[2];
|
|
v.getLocationInWindow(offsetInWindow);
|
|
final int posX = offsetInWindow[0];
|
|
final int posY = offsetInWindow[1] - previewText.getMeasuredHeight();
|
|
final PopupWindow previewPopup = mPreviewPopup;
|
|
if (previewPopup.isShowing()) {
|
|
previewPopup.update(posX, posY, previewPopup.getWidth(), previewPopup.getHeight());
|
|
} else {
|
|
previewPopup.showAtLocation(this, Gravity.NO_GRAVITY, posX, posY);
|
|
}
|
|
previewText.setVisibility(VISIBLE);
|
|
mHandler.postHidePreview();
|
|
}
|
|
|
|
private void addToDictionary(CharSequence word) {
|
|
if (mListener.addWordToDictionary(word.toString())) {
|
|
showPreview(0, getContext().getString(R.string.added_word, word));
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean onLongClick(View view) {
|
|
final Object tag = view.getTag();
|
|
if (!(tag instanceof Integer))
|
|
return true;
|
|
final int index = (Integer) tag;
|
|
if (index >= mSuggestions.size())
|
|
return true;
|
|
|
|
final CharSequence word = mSuggestions.getWord(index);
|
|
if (word.length() < 2)
|
|
return false;
|
|
addToDictionary(word);
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public void onClick(View view) {
|
|
final Object tag = view.getTag();
|
|
if (!(tag instanceof Integer))
|
|
return;
|
|
final int index = (Integer) tag;
|
|
if (index >= mSuggestions.size())
|
|
return;
|
|
|
|
final CharSequence word = mSuggestions.getWord(index);
|
|
if (mShowingAddToDictionary && index == 0) {
|
|
addToDictionary(word);
|
|
} else {
|
|
mListener.pickSuggestionManually(index, word);
|
|
}
|
|
// Because some punctuation letters are not treated as word separator depending on locale,
|
|
// {@link #setSuggestions} might not be called and candidates pane left opened.
|
|
closeCandidatesPane();
|
|
}
|
|
|
|
@Override
|
|
public void onDetachedFromWindow() {
|
|
super.onDetachedFromWindow();
|
|
mHandler.cancelAllMessages();
|
|
hidePreview();
|
|
}
|
|
}
|