/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.text.method;
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import android.text.AutoText;
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import android.text.Editable;
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import android.text.NoCopySpan;
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import android.text.Selection;
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import android.text.Spannable;
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import android.text.TextUtils;
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import android.text.method.TextKeyListener.Capitalize;
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import android.util.SparseArray;
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import android.view.KeyCharacterMap;
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import android.view.KeyEvent;
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import android.view.View;
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/**
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* This is the standard key listener for alphabetic input on qwerty
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* keyboards. You should generally not need to instantiate this yourself;
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* TextKeyListener will do it for you.
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* <p></p>
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* As for all implementations of {@link KeyListener}, this class is only concerned
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* with hardware keyboards. Software input methods have no obligation to trigger
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* the methods in this class.
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*/
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public class QwertyKeyListener extends BaseKeyListener {
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private static QwertyKeyListener[] sInstance =
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new QwertyKeyListener[Capitalize.values().length * 2];
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private static QwertyKeyListener sFullKeyboardInstance;
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private Capitalize mAutoCap;
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private boolean mAutoText;
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private boolean mFullKeyboard;
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private QwertyKeyListener(Capitalize cap, boolean autoText, boolean fullKeyboard) {
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mAutoCap = cap;
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mAutoText = autoText;
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mFullKeyboard = fullKeyboard;
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}
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public QwertyKeyListener(Capitalize cap, boolean autoText) {
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this(cap, autoText, false);
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}
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/**
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* Returns a new or existing instance with the specified capitalization
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* and correction properties.
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*/
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public static QwertyKeyListener getInstance(boolean autoText, Capitalize cap) {
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int off = cap.ordinal() * 2 + (autoText ? 1 : 0);
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if (sInstance[off] == null) {
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sInstance[off] = new QwertyKeyListener(cap, autoText);
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}
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return sInstance[off];
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}
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/**
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* Gets an instance of the listener suitable for use with full keyboards.
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* Disables auto-capitalization, auto-text and long-press initiated on-screen
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* character pickers.
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*/
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public static QwertyKeyListener getInstanceForFullKeyboard() {
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if (sFullKeyboardInstance == null) {
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sFullKeyboardInstance = new QwertyKeyListener(Capitalize.NONE, false, true);
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}
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return sFullKeyboardInstance;
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}
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public int getInputType() {
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return makeTextContentType(mAutoCap, mAutoText);
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}
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public boolean onKeyDown(View view, Editable content,
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int keyCode, KeyEvent event) {
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int selStart, selEnd;
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int pref = 0;
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if (view != null) {
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pref = TextKeyListener.getInstance().getPrefs(view.getContext());
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}
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{
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int a = Selection.getSelectionStart(content);
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int b = Selection.getSelectionEnd(content);
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selStart = Math.min(a, b);
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selEnd = Math.max(a, b);
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if (selStart < 0 || selEnd < 0) {
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selStart = selEnd = 0;
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Selection.setSelection(content, 0, 0);
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}
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}
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int activeStart = content.getSpanStart(TextKeyListener.ACTIVE);
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int activeEnd = content.getSpanEnd(TextKeyListener.ACTIVE);
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// QWERTY keyboard normal case
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int i = event.getUnicodeChar(getMetaState(content, event));
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if (!mFullKeyboard) {
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int count = event.getRepeatCount();
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if (count > 0 && selStart == selEnd && selStart > 0) {
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char c = content.charAt(selStart - 1);
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if ((c == i || c == Character.toUpperCase(i)) && view != null) {
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if (showCharacterPicker(view, content, c, false, count)) {
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resetMetaState(content);
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return true;
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}
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}
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}
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}
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if (i == KeyCharacterMap.PICKER_DIALOG_INPUT) {
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if (view != null) {
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showCharacterPicker(view, content,
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KeyCharacterMap.PICKER_DIALOG_INPUT, true, 1);
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}
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resetMetaState(content);
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return true;
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}
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if (i == KeyCharacterMap.HEX_INPUT) {
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int start;
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if (selStart == selEnd) {
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start = selEnd;
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while (start > 0 && selEnd - start < 4 &&
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Character.digit(content.charAt(start - 1), 16) >= 0) {
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start--;
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}
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} else {
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start = selStart;
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}
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int ch = -1;
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try {
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String hex = TextUtils.substring(content, start, selEnd);
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ch = Integer.parseInt(hex, 16);
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} catch (NumberFormatException nfe) { }
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if (ch >= 0) {
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selStart = start;
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Selection.setSelection(content, selStart, selEnd);
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i = ch;
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} else {
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i = 0;
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}
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}
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if (i != 0) {
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boolean dead = false;
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if ((i & KeyCharacterMap.COMBINING_ACCENT) != 0) {
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dead = true;
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i = i & KeyCharacterMap.COMBINING_ACCENT_MASK;
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}
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if (activeStart == selStart && activeEnd == selEnd) {
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boolean replace = false;
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if (selEnd - selStart - 1 == 0) {
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char accent = content.charAt(selStart);
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int composed = event.getDeadChar(accent, i);
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if (composed != 0) {
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i = composed;
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replace = true;
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dead = false;
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}
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}
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if (!replace) {
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Selection.setSelection(content, selEnd);
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content.removeSpan(TextKeyListener.ACTIVE);
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selStart = selEnd;
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}
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}
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if ((pref & TextKeyListener.AUTO_CAP) != 0
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&& Character.isLowerCase(i)
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&& TextKeyListener.shouldCap(mAutoCap, content, selStart)) {
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int where = content.getSpanEnd(TextKeyListener.CAPPED);
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int flags = content.getSpanFlags(TextKeyListener.CAPPED);
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if (where == selStart && (((flags >> 16) & 0xFFFF) == i)) {
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content.removeSpan(TextKeyListener.CAPPED);
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} else {
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flags = i << 16;
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i = Character.toUpperCase(i);
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if (selStart == 0)
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content.setSpan(TextKeyListener.CAPPED, 0, 0,
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Spannable.SPAN_MARK_MARK | flags);
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else
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content.setSpan(TextKeyListener.CAPPED,
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selStart - 1, selStart,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE |
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flags);
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}
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}
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if (selStart != selEnd) {
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Selection.setSelection(content, selEnd);
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}
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content.setSpan(OLD_SEL_START, selStart, selStart,
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Spannable.SPAN_MARK_MARK);
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content.replace(selStart, selEnd, String.valueOf((char) i));
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int oldStart = content.getSpanStart(OLD_SEL_START);
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selEnd = Selection.getSelectionEnd(content);
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if (oldStart < selEnd) {
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content.setSpan(TextKeyListener.LAST_TYPED,
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oldStart, selEnd,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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if (dead) {
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Selection.setSelection(content, oldStart, selEnd);
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content.setSpan(TextKeyListener.ACTIVE, oldStart, selEnd,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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adjustMetaAfterKeypress(content);
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// potentially do autotext replacement if the character
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// that was typed was an autotext terminator
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if ((pref & TextKeyListener.AUTO_TEXT) != 0 && mAutoText &&
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(i == ' ' || i == '\t' || i == '\n' ||
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i == ',' || i == '.' || i == '!' || i == '?' ||
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i == '"' || Character.getType(i) == Character.END_PUNCTUATION) &&
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content.getSpanEnd(TextKeyListener.INHIBIT_REPLACEMENT)
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!= oldStart) {
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int x;
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for (x = oldStart; x > 0; x--) {
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char c = content.charAt(x - 1);
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if (c != '\'' && !Character.isLetter(c)) {
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break;
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}
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}
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String rep = getReplacement(content, x, oldStart, view);
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if (rep != null) {
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Replaced[] repl = content.getSpans(0, content.length(),
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Replaced.class);
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for (int a = 0; a < repl.length; a++)
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content.removeSpan(repl[a]);
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char[] orig = new char[oldStart - x];
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TextUtils.getChars(content, x, oldStart, orig, 0);
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content.setSpan(new Replaced(orig), x, oldStart,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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content.replace(x, oldStart, rep);
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}
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}
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// Replace two spaces by a period and a space.
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if ((pref & TextKeyListener.AUTO_PERIOD) != 0 && mAutoText) {
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selEnd = Selection.getSelectionEnd(content);
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if (selEnd - 3 >= 0) {
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if (content.charAt(selEnd - 1) == ' ' &&
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content.charAt(selEnd - 2) == ' ') {
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char c = content.charAt(selEnd - 3);
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for (int j = selEnd - 3; j > 0; j--) {
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if (c == '"' ||
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Character.getType(c) == Character.END_PUNCTUATION) {
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c = content.charAt(j - 1);
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} else {
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break;
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}
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}
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if (Character.isLetter(c) || Character.isDigit(c)) {
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content.replace(selEnd - 2, selEnd - 1, ".");
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}
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}
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}
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}
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return true;
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} else if (keyCode == KeyEvent.KEYCODE_DEL
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&& (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_ALT_ON))
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&& selStart == selEnd) {
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// special backspace case for undoing autotext
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int consider = 1;
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// if backspacing over the last typed character,
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// it undoes the autotext prior to that character
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// (unless the character typed was newline, in which
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// case this behavior would be confusing)
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if (content.getSpanEnd(TextKeyListener.LAST_TYPED) == selStart) {
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if (content.charAt(selStart - 1) != '\n')
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consider = 2;
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}
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Replaced[] repl = content.getSpans(selStart - consider, selStart,
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Replaced.class);
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if (repl.length > 0) {
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int st = content.getSpanStart(repl[0]);
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int en = content.getSpanEnd(repl[0]);
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String old = new String(repl[0].mText);
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content.removeSpan(repl[0]);
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// only cancel the autocomplete if the cursor is at the end of
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// the replaced span (or after it, because the user is
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// backspacing over the space after the word, not the word
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// itself).
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if (selStart >= en) {
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content.setSpan(TextKeyListener.INHIBIT_REPLACEMENT,
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en, en, Spannable.SPAN_POINT_POINT);
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content.replace(st, en, old);
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en = content.getSpanStart(TextKeyListener.INHIBIT_REPLACEMENT);
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if (en - 1 >= 0) {
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content.setSpan(TextKeyListener.INHIBIT_REPLACEMENT,
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en - 1, en,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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} else {
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content.removeSpan(TextKeyListener.INHIBIT_REPLACEMENT);
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}
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adjustMetaAfterKeypress(content);
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} else {
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adjustMetaAfterKeypress(content);
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return super.onKeyDown(view, content, keyCode, event);
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}
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return true;
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}
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}
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return super.onKeyDown(view, content, keyCode, event);
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}
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private String getReplacement(CharSequence src, int start, int end,
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View view) {
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int len = end - start;
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boolean changecase = false;
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String replacement = AutoText.get(src, start, end, view);
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if (replacement == null) {
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String key = TextUtils.substring(src, start, end).toLowerCase();
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replacement = AutoText.get(key, 0, end - start, view);
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changecase = true;
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if (replacement == null)
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return null;
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}
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int caps = 0;
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if (changecase) {
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for (int j = start; j < end; j++) {
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if (Character.isUpperCase(src.charAt(j)))
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caps++;
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}
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}
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String out;
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if (caps == 0)
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out = replacement;
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else if (caps == 1)
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out = toTitleCase(replacement);
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else if (caps == len)
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out = replacement.toUpperCase();
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else
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out = toTitleCase(replacement);
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if (out.length() == len &&
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TextUtils.regionMatches(src, start, out, 0, len))
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return null;
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return out;
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}
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/**
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* Marks the specified region of <code>content</code> as having
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* contained <code>original</code> prior to AutoText replacement.
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* Call this method when you have done or are about to do an
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* AutoText-style replacement on a region of text and want to let
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* the same mechanism (the user pressing DEL immediately after the
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* change) undo the replacement.
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*
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* @param content the Editable text where the replacement was made
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* @param start the start of the replaced region
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* @param end the end of the replaced region; the location of the cursor
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* @param original the text to be restored if the user presses DEL
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*/
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public static void markAsReplaced(Spannable content, int start, int end,
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String original) {
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Replaced[] repl = content.getSpans(0, content.length(), Replaced.class);
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for (int a = 0; a < repl.length; a++) {
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content.removeSpan(repl[a]);
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}
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int len = original.length();
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char[] orig = new char[len];
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original.getChars(0, len, orig, 0);
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content.setSpan(new Replaced(orig), start, end,
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Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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private static SparseArray<String> PICKER_SETS =
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new SparseArray<String>();
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static {
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PICKER_SETS.put('A', "\u00C0\u00C1\u00C2\u00C4\u00C6\u00C3\u00C5\u0104\u0100");
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PICKER_SETS.put('C', "\u00C7\u0106\u010C");
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PICKER_SETS.put('D', "\u010E");
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PICKER_SETS.put('E', "\u00C8\u00C9\u00CA\u00CB\u0118\u011A\u0112");
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PICKER_SETS.put('G', "\u011E");
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PICKER_SETS.put('L', "\u0141");
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PICKER_SETS.put('I', "\u00CC\u00CD\u00CE\u00CF\u012A\u0130");
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PICKER_SETS.put('N', "\u00D1\u0143\u0147");
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PICKER_SETS.put('O', "\u00D8\u0152\u00D5\u00D2\u00D3\u00D4\u00D6\u014C");
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PICKER_SETS.put('R', "\u0158");
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PICKER_SETS.put('S', "\u015A\u0160\u015E");
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PICKER_SETS.put('T', "\u0164");
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PICKER_SETS.put('U', "\u00D9\u00DA\u00DB\u00DC\u016E\u016A");
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PICKER_SETS.put('Y', "\u00DD\u0178");
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PICKER_SETS.put('Z', "\u0179\u017B\u017D");
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PICKER_SETS.put('a', "\u00E0\u00E1\u00E2\u00E4\u00E6\u00E3\u00E5\u0105\u0101");
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PICKER_SETS.put('c', "\u00E7\u0107\u010D");
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PICKER_SETS.put('d', "\u010F");
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PICKER_SETS.put('e', "\u00E8\u00E9\u00EA\u00EB\u0119\u011B\u0113");
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PICKER_SETS.put('g', "\u011F");
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PICKER_SETS.put('i', "\u00EC\u00ED\u00EE\u00EF\u012B\u0131");
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PICKER_SETS.put('l', "\u0142");
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PICKER_SETS.put('n', "\u00F1\u0144\u0148");
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PICKER_SETS.put('o', "\u00F8\u0153\u00F5\u00F2\u00F3\u00F4\u00F6\u014D");
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PICKER_SETS.put('r', "\u0159");
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PICKER_SETS.put('s', "\u00A7\u00DF\u015B\u0161\u015F");
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PICKER_SETS.put('t', "\u0165");
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PICKER_SETS.put('u', "\u00F9\u00FA\u00FB\u00FC\u016F\u016B");
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PICKER_SETS.put('y', "\u00FD\u00FF");
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PICKER_SETS.put('z', "\u017A\u017C\u017E");
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PICKER_SETS.put(KeyCharacterMap.PICKER_DIALOG_INPUT,
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"\u2026\u00A5\u2022\u00AE\u00A9\u00B1[]{}\\|");
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PICKER_SETS.put('/', "\\");
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// From packages/inputmethods/LatinIME/res/xml/kbd_symbols.xml
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PICKER_SETS.put('1', "\u00b9\u00bd\u2153\u00bc\u215b");
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PICKER_SETS.put('2', "\u00b2\u2154");
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PICKER_SETS.put('3', "\u00b3\u00be\u215c");
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PICKER_SETS.put('4', "\u2074");
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PICKER_SETS.put('5', "\u215d");
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PICKER_SETS.put('7', "\u215e");
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PICKER_SETS.put('0', "\u207f\u2205");
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PICKER_SETS.put('$', "\u00a2\u00a3\u20ac\u00a5\u20a3\u20a4\u20b1");
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PICKER_SETS.put('%', "\u2030");
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PICKER_SETS.put('*', "\u2020\u2021");
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PICKER_SETS.put('-', "\u2013\u2014");
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PICKER_SETS.put('+', "\u00b1");
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PICKER_SETS.put('(', "[{<");
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PICKER_SETS.put(')', "]}>");
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PICKER_SETS.put('!', "\u00a1");
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PICKER_SETS.put('"', "\u201c\u201d\u00ab\u00bb\u02dd");
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PICKER_SETS.put('?', "\u00bf");
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PICKER_SETS.put(',', "\u201a\u201e");
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// From packages/inputmethods/LatinIME/res/xml/kbd_symbols_shift.xml
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PICKER_SETS.put('=', "\u2260\u2248\u221e");
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PICKER_SETS.put('<', "\u2264\u00ab\u2039");
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PICKER_SETS.put('>', "\u2265\u00bb\u203a");
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};
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private boolean showCharacterPicker(View view, Editable content, char c,
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boolean insert, int count) {
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String set = PICKER_SETS.get(c);
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if (set == null) {
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return false;
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}
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if (count == 1) {
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new CharacterPickerDialog(view.getContext(),
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view, content, set, insert).show();
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}
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return true;
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}
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private static String toTitleCase(String src) {
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return Character.toUpperCase(src.charAt(0)) + src.substring(1);
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}
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/* package */ static class Replaced implements NoCopySpan
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{
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public Replaced(char[] text) {
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mText = text;
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}
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private char[] mText;
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}
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}
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