/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.s16.inputmethod.skeyboard;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.PopupWindow;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import com.s16.inputmethod.skeyboard.R;
public class CandidateView extends View {
private static final int OUT_OF_BOUNDS_WORD_INDEX = -1;
private static final int OUT_OF_BOUNDS_X_COORD = -1;
private LatinIME mService;
private final ArrayList<CharSequence> mSuggestions = new ArrayList<CharSequence>();
private boolean mShowingCompletions;
private CharSequence mSelectedString;
private int mSelectedIndex;
private int mTouchX = OUT_OF_BOUNDS_X_COORD;
private Drawable mSelectionHighlight;
private boolean mTypedWordValid;
private boolean mHaveMinimalSuggestion;
private Rect mBgPadding;
private final TextView mPreviewText;
private final PopupWindow mPreviewPopup;
private int mCurrentWordIndex;
private Drawable mDivider;
private static final int MAX_SUGGESTIONS = 32;
private static final int SCROLL_PIXELS = 20;
private final int[] mWordWidth = new int[MAX_SUGGESTIONS];
private final int[] mWordX = new int[MAX_SUGGESTIONS];
private int mPopupPreviewX;
private int mPopupPreviewY;
private static final int X_GAP = 10;
private int mColorNormal;
private int mColorRecommended;
private int mColorOther;
private final Paint mPaint;
private final int mDescent;
private boolean mScrolled;
private boolean mShowingAddToDictionary;
private CharSequence mAddToDictionaryHint;
private int mTargetScrollX;
private final int mMinTouchableWidth;
private int mTotalWidth;
private final GestureDetector mGestureDetector;
/**
* Construct a CandidateView for showing suggested words for completion.
* @param context
* @param attrs
*/
@SuppressLint("InflateParams")
@SuppressWarnings("deprecation")
public CandidateView(Context context, AttributeSet attrs) {
super(context, attrs);
mSelectionHighlight = context.getResources().getDrawable(R.drawable.list_selector_background_pressed);
LayoutInflater inflate =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resources res = context.getResources();
mPreviewPopup = new PopupWindow(context);
mPreviewText = (TextView) inflate.inflate(R.layout.candidate_preview, null);
mPreviewPopup.setWindowLayoutMode(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
mPreviewPopup.setContentView(mPreviewText);
mPreviewPopup.setBackgroundDrawable(null);
mPreviewPopup.setAnimationStyle(R.style.KeyPreviewAnimation);
mColorNormal = res.getColor(R.color.candidate_normal);
mColorRecommended = res.getColor(R.color.candidate_recommended);
mColorOther = res.getColor(R.color.candidate_other);
mDivider = res.getDrawable(R.drawable.keyboard_suggest_strip_divider);
mAddToDictionaryHint = res.getString(R.string.hint_add_to_dictionary);
mPaint = new Paint();
mPaint.setColor(mColorNormal);
mPaint.setAntiAlias(true);
mPaint.setTextSize(mPreviewText.getTextSize());
mPaint.setStrokeWidth(0);
mPaint.setTextAlign(Align.CENTER);
mDescent = (int) mPaint.descent();
mMinTouchableWidth = (int)res.getDimension(R.dimen.candidate_min_touchable_width);
mGestureDetector = new GestureDetector(
new CandidateStripGestureListener(mMinTouchableWidth));
setWillNotDraw(false);
setHorizontalScrollBarEnabled(false);
setVerticalScrollBarEnabled(false);
scrollTo(0, getScrollY());
}
// SMM {
@SuppressWarnings("deprecation")
public void setStyle(Context context, int styleResId) {
if (styleResId == 0) {
styleResId = R.style.KeyboardBaseView;
}
final TypedArray a = context.obtainStyledAttributes(styleResId, R.styleable.KeyboardBaseView);
mSelectionHighlight = a.getDrawable(R.styleable.KeyboardBaseView_candidateSelection);
mSelectionHighlight.setBounds(0, 0, mSelectionHighlight.getIntrinsicWidth(), mSelectionHighlight.getIntrinsicHeight());
mColorNormal = a.getColor(R.styleable.KeyboardBaseView_candidateTextColorNormal, 0);
mColorRecommended = a.getColor(R.styleable.KeyboardBaseView_candidateTextColorRecommended, 0);
mColorOther = a.getColor(R.styleable.KeyboardBaseView_candidateTextColorOther, 0);
mDivider = a.getDrawable(R.styleable.KeyboardBaseView_candidateDivider);
mDivider.setBounds(0, 0, mDivider.getIntrinsicWidth(), mDivider.getIntrinsicHeight());
Drawable background = a.getDrawable(R.styleable.KeyboardBaseView_candidateBackground);
a.recycle();
if (background != null) {
setBackgroundDrawable(background);
}
invalidate();
}
// } SMM
private class CandidateStripGestureListener extends GestureDetector.SimpleOnGestureListener {
private final int mTouchSlopSquare;
public CandidateStripGestureListener(int touchSlop) {
// Slightly reluctant to scroll to be able to easily choose the suggestion
mTouchSlopSquare = touchSlop * touchSlop;
}
@Override
public void onLongPress(MotionEvent me) {
if (mSuggestions.size() > 0) {
if (me.getX() + getScrollX() < mWordWidth[0] && getScrollX() < 10) {
longPressFirstWord();
}
}
}
@Override
public boolean onDown(MotionEvent e) {
mScrolled = false;
return false;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
if (!mScrolled) {
// This is applied only when we recognize that scrolling is starting.
final int deltaX = (int) (e2.getX() - e1.getX());
final int deltaY = (int) (e2.getY() - e1.getY());
final int distance = (deltaX * deltaX) + (deltaY * deltaY);
if (distance < mTouchSlopSquare) {
return true;
}
mScrolled = true;
}
final int width = getWidth();
mScrolled = true;
int scrollX = getScrollX();
scrollX += (int) distanceX;
if (scrollX < 0) {
scrollX = 0;
}
if (distanceX > 0 && scrollX + width > mTotalWidth) {
scrollX -= (int) distanceX;
}
mTargetScrollX = scrollX;
scrollTo(scrollX, getScrollY());
hidePreview();
invalidate();
return true;
}
}
/**
* A connection back to the service to communicate with the text field
* @param listener
*/
public void setService(LatinIME listener) {
mService = listener;
}
@Override
public int computeHorizontalScrollRange() {
return mTotalWidth;
}
/**
* If the canvas is null, then only touch calculations are performed to pick the target
* candidate.
*/
@Override
protected void onDraw(Canvas canvas) {
if (canvas != null) {
super.onDraw(canvas);
}
mTotalWidth = 0;
final int height = getHeight();
if (mBgPadding == null) {
mBgPadding = new Rect(0, 0, 0, 0);
if (getBackground() != null) {
getBackground().getPadding(mBgPadding);
}
mDivider.setBounds(0, 0, mDivider.getIntrinsicWidth(),
mDivider.getIntrinsicHeight());
}
final int count = mSuggestions.size();
final Rect bgPadding = mBgPadding;
final Paint paint = mPaint;
final int touchX = mTouchX;
final int scrollX = getScrollX();
final boolean scrolled = mScrolled;
final boolean typedWordValid = mTypedWordValid;
final int y = (int) (height + mPaint.getTextSize() - mDescent) / 2;
boolean existsAutoCompletion = false;
int x = 0;
for (int i = 0; i < count; i++) {
CharSequence suggestion = mSuggestions.get(i);
if (suggestion == null) continue;
final int wordLength = suggestion.length();
paint.setColor(mColorNormal);
if (mHaveMinimalSuggestion
&& ((i == 1 && !typedWordValid) || (i == 0 && typedWordValid))) {
paint.setTypeface(Typeface.DEFAULT_BOLD);
paint.setColor(mColorRecommended);
existsAutoCompletion = true;
} else if (i != 0 || (wordLength == 1 && count > 1)) {
// HACK: even if i == 0, we use mColorOther when this suggestion's length is 1 and
// there are multiple suggestions, such as the default punctuation list.
paint.setColor(mColorOther);
}
int wordWidth;
if ((wordWidth = mWordWidth[i]) == 0) {
float textWidth = paint.measureText(suggestion, 0, wordLength);
wordWidth = Math.max(mMinTouchableWidth, (int) textWidth + X_GAP * 2);
mWordWidth[i] = wordWidth;
}
mWordX[i] = x;
if (touchX != OUT_OF_BOUNDS_X_COORD && !scrolled
&& touchX + scrollX >= x && touchX + scrollX < x + wordWidth) {
if (canvas != null && !mShowingAddToDictionary) {
canvas.translate(x, 0);
mSelectionHighlight.setBounds(0, bgPadding.top, wordWidth, height);
mSelectionHighlight.draw(canvas);
canvas.translate(-x, 0);
}
mSelectedString = suggestion;
mSelectedIndex = i;
}
if (canvas != null) {
if(ZawGyiCorrection.isMyChar(suggestion)) { // SMM
paint.setTypeface(KeyboardTheme.getZawgyiTypeFace(getContext()));
}
final String fixSuggestion = ZawGyiCorrection.ZawGyiDrawFix(suggestion).toString();
canvas.drawText(fixSuggestion, 0, wordLength, x + wordWidth / 2, y, paint);
paint.setColor(mColorOther);
canvas.translate(x + wordWidth, 0);
// Draw a divider unless it's after the hint
if (!(mShowingAddToDictionary && i == 1)) {
mDivider.draw(canvas);
}
canvas.translate(-x - wordWidth, 0);
}
paint.setTypeface(Typeface.DEFAULT);
x += wordWidth;
}
mService.onAutoCompletionStateChanged(existsAutoCompletion);
mTotalWidth = x;
if (mTargetScrollX != scrollX) {
scrollToTarget();
}
}
private void scrollToTarget() {
int scrollX = getScrollX();
if (mTargetScrollX > scrollX) {
scrollX += SCROLL_PIXELS;
if (scrollX >= mTargetScrollX) {
scrollX = mTargetScrollX;
scrollTo(scrollX, getScrollY());
requestLayout();
} else {
scrollTo(scrollX, getScrollY());
}
} else {
scrollX -= SCROLL_PIXELS;
if (scrollX <= mTargetScrollX) {
scrollX = mTargetScrollX;
scrollTo(scrollX, getScrollY());
requestLayout();
} else {
scrollTo(scrollX, getScrollY());
}
}
invalidate();
}
public void setSuggestions(List<CharSequence> suggestions, boolean completions,
boolean typedWordValid, boolean haveMinimalSuggestion) {
clear();
if (suggestions != null) {
int insertCount = Math.min(suggestions.size(), MAX_SUGGESTIONS);
for (CharSequence suggestion : suggestions) {
mSuggestions.add(suggestion);
if (--insertCount == 0)
break;
}
}
mShowingCompletions = completions;
mTypedWordValid = typedWordValid;
scrollTo(0, getScrollY());
mTargetScrollX = 0;
mHaveMinimalSuggestion = haveMinimalSuggestion;
// Compute the total width
//onDraw(null);
invalidate();
requestLayout();
}
public boolean isShowingAddToDictionaryHint() {
return mShowingAddToDictionary;
}
public void showAddToDictionaryHint(CharSequence word) {
ArrayList<CharSequence> suggestions = new ArrayList<CharSequence>();
suggestions.add(word);
suggestions.add(mAddToDictionaryHint);
setSuggestions(suggestions, false, false, false);
mShowingAddToDictionary = true;
}
public boolean dismissAddToDictionaryHint() {
if (!mShowingAddToDictionary) return false;
clear();
return true;
}
/* package */ List<CharSequence> getSuggestions() {
return mSuggestions;
}
public void clear() {
// Don't call mSuggestions.clear() because it's being used for logging
// in LatinIME.pickSuggestionManually().
mSuggestions.clear();
mTouchX = OUT_OF_BOUNDS_X_COORD;
mSelectedString = null;
mSelectedIndex = -1;
mShowingAddToDictionary = false;
invalidate();
Arrays.fill(mWordWidth, 0);
Arrays.fill(mWordX, 0);
}
@Override
public boolean onTouchEvent(MotionEvent me) {
if (mGestureDetector.onTouchEvent(me)) {
return true;
}
int action = me.getAction();
int x = (int) me.getX();
int y = (int) me.getY();
mTouchX = x;
switch (action) {
case MotionEvent.ACTION_DOWN:
invalidate();
break;
case MotionEvent.ACTION_MOVE:
if (y <= 0) {
// Fling up!?
if (mSelectedString != null) {
// If there are completions from the application, we don't change the state to
// STATE_PICKED_SUGGESTION
if (!mShowingCompletions) {
// This "acceptedSuggestion" will not be counted as a word because
// it will be counted in pickSuggestion instead.
TextEntryState.acceptedSuggestion(mSuggestions.get(0), mSelectedString);
}
mService.pickSuggestionManually(mSelectedIndex, mSelectedString);
mSelectedString = null;
mSelectedIndex = -1;
}
}
break;
case MotionEvent.ACTION_UP:
if (!mScrolled) {
if (mSelectedString != null) {
if (mShowingAddToDictionary) {
longPressFirstWord();
clear();
} else {
if (!mShowingCompletions) {
TextEntryState.acceptedSuggestion(mSuggestions.get(0), mSelectedString);
}
mService.pickSuggestionManually(mSelectedIndex, mSelectedString);
}
}
}
mSelectedString = null;
mSelectedIndex = -1;
requestLayout();
hidePreview();
invalidate();
break;
}
return true;
}
private void hidePreview() {
mTouchX = OUT_OF_BOUNDS_X_COORD;
mCurrentWordIndex = OUT_OF_BOUNDS_WORD_INDEX;
mPreviewPopup.dismiss();
}
private void showPreview(int wordIndex, String altText) {
int oldWordIndex = mCurrentWordIndex;
mCurrentWordIndex = wordIndex;
// If index changed or changing text
if (oldWordIndex != mCurrentWordIndex || altText != null) {
if (wordIndex == OUT_OF_BOUNDS_WORD_INDEX) {
hidePreview();
} else {
CharSequence word = altText != null? altText : mSuggestions.get(wordIndex);
if(ZawGyiCorrection.isMyChar(word)) { // SMM
mPreviewText.setTypeface(KeyboardTheme.getZawgyiTypeFace(getContext()));
}
mPreviewText.setText(word);
mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int wordWidth = (int) (mPaint.measureText(word, 0, word.length()) + X_GAP * 2);
final int popupWidth = wordWidth
+ mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight();
final int popupHeight = mPreviewText.getMeasuredHeight();
//mPreviewText.setVisibility(INVISIBLE);
mPopupPreviewX = mWordX[wordIndex] - mPreviewText.getPaddingLeft() - getScrollX()
+ (mWordWidth[wordIndex] - wordWidth) / 2;
mPopupPreviewY = - popupHeight;
int [] offsetInWindow = new int[2];
getLocationInWindow(offsetInWindow);
if (mPreviewPopup.isShowing()) {
mPreviewPopup.update(mPopupPreviewX, mPopupPreviewY + offsetInWindow[1],
popupWidth, popupHeight);
} else {
mPreviewPopup.setWidth(popupWidth);
mPreviewPopup.setHeight(popupHeight);
mPreviewPopup.showAtLocation(this, Gravity.NO_GRAVITY, mPopupPreviewX,
mPopupPreviewY + offsetInWindow[1]);
}
mPreviewText.setVisibility(VISIBLE);
}
}
}
private void longPressFirstWord() {
CharSequence word = mSuggestions.get(0);
if (word.length() < 2) return;
if (mService.addWordToDictionary(word.toString())) {
showPreview(0, getContext().getResources().getString(R.string.added_word, word));
}
}
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
hidePreview();
}
}