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