/*
* Copyright (C) 2010 Google Inc.
*
* 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.internal.widget;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.graphics.drawable.Drawable;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import com.android.internal.R;
/**
* A basic, embed-able keyboard designed for password entry. Allows entry of all Latin-1 characters.
*
* It has two modes: alpha and numeric. In alpha mode, it allows all Latin-1 characters and enables
* an additional keyboard with symbols. In numeric mode, it shows a 12-key DTMF dialer-like
* keypad with alpha characters hints.
*/
public class PasswordEntryKeyboard extends Keyboard {
private static final int SHIFT_OFF = 0;
private static final int SHIFT_ON = 1;
private static final int SHIFT_LOCKED = 2;
public static final int KEYCODE_SPACE = ' ';
private Drawable mShiftIcon;
private Drawable mShiftLockIcon;
// These two arrays must be the same length
private Drawable[] mOldShiftIcons = { null, null };
private Key[] mShiftKeys = { null, null };
private Key mEnterKey;
private Key mF1Key;
private Key mSpaceKey;
private int mShiftState = SHIFT_OFF;
static int sSpacebarVerticalCorrection;
public PasswordEntryKeyboard(Context context, int xmlLayoutResId) {
this(context, xmlLayoutResId, 0);
}
public PasswordEntryKeyboard(Context context, int xmlLayoutResId, int width, int height) {
this(context, xmlLayoutResId, 0, width, height);
}
public PasswordEntryKeyboard(Context context, int xmlLayoutResId, int mode) {
super(context, xmlLayoutResId, mode);
init(context);
}
public PasswordEntryKeyboard(Context context, int xmlLayoutResId, int mode,
int width, int height) {
super(context, xmlLayoutResId, mode, width, height);
init(context);
}
private void init(Context context) {
final Resources res = context.getResources();
mShiftIcon = context.getDrawable(R.drawable.sym_keyboard_shift);
mShiftLockIcon = context.getDrawable(R.drawable.sym_keyboard_shift_locked);
sSpacebarVerticalCorrection = res.getDimensionPixelOffset(
R.dimen.password_keyboard_spacebar_vertical_correction);
}
public PasswordEntryKeyboard(Context context, int layoutTemplateResId,
CharSequence characters, int columns, int horizontalPadding) {
super(context, layoutTemplateResId, characters, columns, horizontalPadding);
}
@Override
protected Key createKeyFromXml(Resources res, Row parent, int x, int y,
XmlResourceParser parser) {
LatinKey key = new LatinKey(res, parent, x, y, parser);
final int code = key.codes[0];
if (code >=0 && code != '\n' && (code < 32 || code > 127)) {
// Log.w(TAG, "Key code for " + key.label + " is not latin-1");
key.label = " ";
key.setEnabled(false);
}
switch (key.codes[0]) {
case 10:
mEnterKey = key;
break;
case PasswordEntryKeyboardView.KEYCODE_F1:
mF1Key = key;
break;
case 32:
mSpaceKey = key;
break;
}
return key;
}
/**
* Allows enter key resources to be overridden
* @param res resources to grab given items from
* @param previewId preview drawable shown on enter key
* @param iconId normal drawable shown on enter key
* @param labelId string shown on enter key
*/
void setEnterKeyResources(Resources res, int previewId, int iconId, int labelId) {
if (mEnterKey != null) {
// Reset some of the rarely used attributes.
mEnterKey.popupCharacters = null;
mEnterKey.popupResId = 0;
mEnterKey.text = null;
mEnterKey.iconPreview = res.getDrawable(previewId);
mEnterKey.icon = res.getDrawable(iconId);
mEnterKey.label = res.getText(labelId);
// Set the initial size of the preview icon
if (mEnterKey.iconPreview != null) {
mEnterKey.iconPreview.setBounds(0, 0,
mEnterKey.iconPreview.getIntrinsicWidth(),
mEnterKey.iconPreview.getIntrinsicHeight());
}
}
}
/**
* Allows shiftlock to be turned on. See {@link #setShiftLocked(boolean)}
*
*/
void enableShiftLock() {
int i = 0;
for (int index : getShiftKeyIndices()) {
if (index >= 0 && i < mShiftKeys.length) {
mShiftKeys[i] = getKeys().get(index);
if (mShiftKeys[i] instanceof LatinKey) {
((LatinKey)mShiftKeys[i]).enableShiftLock();
}
mOldShiftIcons[i] = mShiftKeys[i].icon;
i++;
}
}
}
/**
* Turn on shift lock. This turns on the LED for this key, if it has one.
* It should be followed by a call to {@link KeyboardView#invalidateKey(int)}
* or {@link KeyboardView#invalidateAllKeys()}
*
* @param shiftLocked
*/
void setShiftLocked(boolean shiftLocked) {
for (Key shiftKey : mShiftKeys) {
if (shiftKey != null) {
shiftKey.on = shiftLocked;
shiftKey.icon = mShiftLockIcon;
}
}
mShiftState = shiftLocked ? SHIFT_LOCKED : SHIFT_ON;
}
/**
* Turn on shift mode. Sets shift mode and turns on icon for shift key.
* It should be followed by a call to {@link KeyboardView#invalidateKey(int)}
* or {@link KeyboardView#invalidateAllKeys()}
*
* @param shiftLocked
*/
@Override
public boolean setShifted(boolean shiftState) {
boolean shiftChanged = false;
if (shiftState == false) {
shiftChanged = mShiftState != SHIFT_OFF;
mShiftState = SHIFT_OFF;
} else if (mShiftState == SHIFT_OFF) {
shiftChanged = mShiftState == SHIFT_OFF;
mShiftState = SHIFT_ON;
}
for (int i = 0; i < mShiftKeys.length; i++) {
if (mShiftKeys[i] != null) {
if (shiftState == false) {
mShiftKeys[i].on = false;
mShiftKeys[i].icon = mOldShiftIcons[i];
} else if (mShiftState == SHIFT_OFF) {
mShiftKeys[i].on = false;
mShiftKeys[i].icon = mShiftIcon;
}
} else {
// return super.setShifted(shiftState);
}
}
return shiftChanged;
}
/**
* Whether or not keyboard is shifted.
* @return true if keyboard state is shifted.
*/
@Override
public boolean isShifted() {
if (mShiftKeys[0] != null) {
return mShiftState != SHIFT_OFF;
} else {
return super.isShifted();
}
}
static class LatinKey extends Keyboard.Key {
private boolean mShiftLockEnabled;
private boolean mEnabled = true;
public LatinKey(Resources res, Keyboard.Row parent, int x, int y,
XmlResourceParser parser) {
super(res, parent, x, y, parser);
if (popupCharacters != null && popupCharacters.length() == 0) {
// If there is a keyboard with no keys specified in popupCharacters
popupResId = 0;
}
}
void setEnabled(boolean enabled) {
mEnabled = enabled;
}
void enableShiftLock() {
mShiftLockEnabled = true;
}
@Override
public void onReleased(boolean inside) {
if (!mShiftLockEnabled) {
super.onReleased(inside);
} else {
pressed = !pressed;
}
}
/**
* Overriding this method so that we can reduce the target area for certain keys.
*/
@Override
public boolean isInside(int x, int y) {
if (!mEnabled) {
return false;
}
final int code = codes[0];
if (code == KEYCODE_SHIFT || code == KEYCODE_DELETE) {
y -= height / 10;
if (code == KEYCODE_SHIFT) x += width / 6;
if (code == KEYCODE_DELETE) x -= width / 6;
} else if (code == KEYCODE_SPACE) {
y += PasswordEntryKeyboard.sSpacebarVerticalCorrection;
}
return super.isInside(x, y);
}
}
}
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