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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.android.inputmethod.latin.suggestions;
import android.content.res.Resources;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import com.android.inputmethod.keyboard.Key;
import com.android.inputmethod.keyboard.Keyboard;
import com.android.inputmethod.keyboard.KeyboardSwitcher;
import com.android.inputmethod.keyboard.KeyboardView;
import com.android.inputmethod.latin.LatinImeLogger;
import com.android.inputmethod.latin.R;
import com.android.inputmethod.latin.SuggestedWords;
import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
public class MoreSuggestions extends Keyboard {
public static final int SUGGESTION_CODE_BASE = 1024;
private MoreSuggestions(Builder.MoreSuggestionsParam params) {
super(params);
}
public static class Builder extends Keyboard.Builder<Builder.MoreSuggestionsParam> {
private static final boolean DBG = LatinImeLogger.sDBG;
private final MoreSuggestionsView mPaneView;
private SuggestedWords mSuggestions;
private int mFromPos;
private int mToPos;
public static class MoreSuggestionsParam extends Keyboard.Params {
private final int[] mWidths = new int[SuggestionsView.MAX_SUGGESTIONS];
private final int[] mRowNumbers = new int[SuggestionsView.MAX_SUGGESTIONS];
private final int[] mColumnOrders = new int[SuggestionsView.MAX_SUGGESTIONS];
private final int[] mNumColumnsInRow = new int[SuggestionsView.MAX_SUGGESTIONS];
private static final int MAX_COLUMNS_IN_ROW = 3;
private int mNumRows;
public Drawable mDivider;
public int mDividerWidth;
public int layout(SuggestedWords suggestions, int fromPos, int maxWidth, int minWidth,
int maxRow, KeyboardView view) {
clearKeys();
final Paint paint = new Paint();
paint.setAntiAlias(true);
final Resources res = view.getContext().getResources();
mDivider = res.getDrawable(R.drawable.more_suggestions_divider);
// TODO: Drawable itself should has an alpha value.
mDivider.setAlpha(128);
mDividerWidth = mDivider.getIntrinsicWidth();
final int padding = (int) res.getDimension(
R.dimen.more_suggestions_key_horizontal_padding);
int row = 0;
int pos = fromPos, rowStartPos = fromPos;
final int size = Math.min(suggestions.size(), SuggestionsView.MAX_SUGGESTIONS);
while (pos < size) {
final String word = suggestions.getWord(pos).toString();
// TODO: Should take care of text x-scaling.
mWidths[pos] = (int)view.getDefaultLabelWidth(word, paint) + padding;
final int numColumn = pos - rowStartPos + 1;
final int columnWidth =
(maxWidth - mDividerWidth * (numColumn - 1)) / numColumn;
if (numColumn > MAX_COLUMNS_IN_ROW
|| !fitInWidth(rowStartPos, pos + 1, columnWidth)) {
if ((row + 1) >= maxRow) {
break;
}
mNumColumnsInRow[row] = pos - rowStartPos;
rowStartPos = pos;
row++;
}
mColumnOrders[pos] = pos - rowStartPos;
mRowNumbers[pos] = row;
pos++;
}
mNumColumnsInRow[row] = pos - rowStartPos;
mNumRows = row + 1;
mBaseWidth = mOccupiedWidth = Math.max(
minWidth, calcurateMaxRowWidth(fromPos, pos));
mBaseHeight = mOccupiedHeight = mNumRows * mDefaultRowHeight + mVerticalGap;
return pos - fromPos;
}
private boolean fitInWidth(int startPos, int endPos, int width) {
for (int pos = startPos; pos < endPos; pos++) {
if (mWidths[pos] > width)
return false;
}
return true;
}
private int calcurateMaxRowWidth(int startPos, int endPos) {
int maxRowWidth = 0;
int pos = startPos;
for (int row = 0; row < mNumRows; row++) {
final int numColumnInRow = mNumColumnsInRow[row];
int maxKeyWidth = 0;
while (pos < endPos && mRowNumbers[pos] == row) {
maxKeyWidth = Math.max(maxKeyWidth, mWidths[pos]);
pos++;
}
maxRowWidth = Math.max(maxRowWidth,
maxKeyWidth * numColumnInRow + mDividerWidth * (numColumnInRow - 1));
}
return maxRowWidth;
}
private static final int[][] COLUMN_ORDER_TO_NUMBER = {
{ 0, },
{ 1, 0, },
{ 2, 0, 1},
};
public int getNumColumnInRow(int pos) {
return mNumColumnsInRow[mRowNumbers[pos]];
}
public int getColumnNumber(int pos) {
final int columnOrder = mColumnOrders[pos];
final int numColumn = getNumColumnInRow(pos);
return COLUMN_ORDER_TO_NUMBER[numColumn - 1][columnOrder];
}
public int getX(int pos) {
final int columnNumber = getColumnNumber(pos);
return columnNumber * (getWidth(pos) + mDividerWidth);
}
public int getY(int pos) {
final int row = mRowNumbers[pos];
return (mNumRows -1 - row) * mDefaultRowHeight + mTopPadding;
}
public int getWidth(int pos) {
final int numColumnInRow = getNumColumnInRow(pos);
return (mOccupiedWidth - mDividerWidth * (numColumnInRow - 1)) / numColumnInRow;
}
public void markAsEdgeKey(Key key, int pos) {
final int row = mRowNumbers[pos];
if (row == 0)
key.markAsBottomEdge(this);
if (row == mNumRows - 1)
key.markAsTopEdge(this);
final int numColumnInRow = mNumColumnsInRow[row];
final int column = getColumnNumber(pos);
if (column == 0)
key.markAsLeftEdge(this);
if (column == numColumnInRow - 1)
key.markAsRightEdge(this);
}
}
public Builder(MoreSuggestionsView paneView) {
super(paneView.getContext(), new MoreSuggestionsParam());
mPaneView = paneView;
}
public Builder layout(SuggestedWords suggestions, int fromPos, int maxWidth,
int minWidth, int maxRow) {
final Keyboard keyboard = KeyboardSwitcher.getInstance().getKeyboard();
final int xmlId = R.xml.kbd_suggestions_pane_template;
load(xmlId, keyboard.mId);
mParams.mVerticalGap = mParams.mTopPadding = keyboard.mVerticalGap / 2;
final int count = mParams.layout(suggestions, fromPos, maxWidth, minWidth, maxRow,
mPaneView);
mFromPos = fromPos;
mToPos = fromPos + count;
mSuggestions = suggestions;
return this;
}
private static String getDebugInfo(SuggestedWords suggestions, int pos) {
if (!DBG) return null;
final SuggestedWordInfo wordInfo = suggestions.getInfo(pos);
if (wordInfo == null) return null;
final String info = wordInfo.getDebugString();
if (TextUtils.isEmpty(info)) return null;
return info;
}
@Override
public MoreSuggestions build() {
final MoreSuggestionsParam params = mParams;
for (int pos = mFromPos; pos < mToPos; pos++) {
final int x = params.getX(pos);
final int y = params.getY(pos);
final int width = params.getWidth(pos);
final String word = mSuggestions.getWord(pos).toString();
final String info = getDebugInfo(mSuggestions, pos);
final int index = pos + SUGGESTION_CODE_BASE;
final Key key = new Key(
params, word, info, null, index, null, x, y, width,
params.mDefaultRowHeight);
params.markAsEdgeKey(key, pos);
params.onAddKey(key);
final int columnNumber = params.getColumnNumber(pos);
final int numColumnInRow = params.getNumColumnInRow(pos);
if (columnNumber < numColumnInRow - 1) {
final Key.Spacer spacer = new Key.Spacer(params, params.mDivider, x + width, y,
params.mDividerWidth, params.mDefaultRowHeight);
params.onAddKey(spacer);
}
}
return new MoreSuggestions(params);
}
}
}
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