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/*
* Copyright (C) 2012 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.keyguard;
import android.content.Context;
import android.text.Editable;
import android.text.InputType;
import android.text.TextWatcher;
import android.text.method.TextKeyListener;
import android.util.AttributeSet;
import android.view.View;
import android.view.inputmethod.InputMethodInfo;
import android.view.inputmethod.InputMethodManager;
import android.view.inputmethod.InputMethodSubtype;
import android.widget.TextView.OnEditorActionListener;
import java.util.List;
/**
* Displays an alphanumeric (latin-1) key entry for the user to enter
* an unlock password
*/
public class KeyguardPasswordView extends KeyguardAbsKeyInputView
implements KeyguardSecurityView, OnEditorActionListener, TextWatcher {
private final boolean mShowImeAtScreenOn;
InputMethodManager mImm;
public KeyguardPasswordView(Context context) {
this(context, null);
}
public KeyguardPasswordView(Context context, AttributeSet attrs) {
super(context, attrs);
mShowImeAtScreenOn = context.getResources().
getBoolean(R.bool.kg_show_ime_at_screen_on);
}
protected void resetState() {
mSecurityMessageDisplay.setMessage(R.string.kg_password_instructions, false);
mPasswordEntry.setEnabled(true);
}
@Override
protected int getPasswordTextViewId() {
return R.id.passwordEntry;
}
@Override
public boolean needsInput() {
return true;
}
@Override
public void onResume(int reason) {
super.onResume(reason);
mPasswordEntry.requestFocus();
if (reason != KeyguardSecurityView.SCREEN_ON || mShowImeAtScreenOn) {
mImm.showSoftInput(mPasswordEntry, InputMethodManager.SHOW_IMPLICIT);
}
}
@Override
public void onPause() {
super.onPause();
mImm.hideSoftInputFromWindow(getWindowToken(), 0);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
boolean imeOrDeleteButtonVisible = false;
mImm = (InputMethodManager) getContext().getSystemService(
Context.INPUT_METHOD_SERVICE);
mPasswordEntry.setKeyListener(TextKeyListener.getInstance());
mPasswordEntry.setInputType(InputType.TYPE_CLASS_TEXT
| InputType.TYPE_TEXT_VARIATION_PASSWORD);
// Poke the wakelock any time the text is selected or modified
mPasswordEntry.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mCallback.userActivity(0); // TODO: customize timeout for text?
}
});
mPasswordEntry.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void afterTextChanged(Editable s) {
if (mCallback != null) {
mCallback.userActivity(0);
}
}
});
mPasswordEntry.requestFocus();
// If there's more than one IME, enable the IME switcher button
View switchImeButton = findViewById(R.id.switch_ime_button);
if (switchImeButton != null && hasMultipleEnabledIMEsOrSubtypes(mImm, false)) {
switchImeButton.setVisibility(View.VISIBLE);
imeOrDeleteButtonVisible = true;
switchImeButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mCallback.userActivity(0); // Leave the screen on a bit longer
mImm.showInputMethodPicker();
}
});
}
// If no icon is visible, reset the start margin on the password field so the text is
// still centered.
if (!imeOrDeleteButtonVisible) {
android.view.ViewGroup.LayoutParams params = mPasswordEntry.getLayoutParams();
if (params instanceof MarginLayoutParams) {
final MarginLayoutParams mlp = (MarginLayoutParams) params;
mlp.setMarginStart(0);
mPasswordEntry.setLayoutParams(params);
}
}
}
/**
* Method adapted from com.android.inputmethod.latin.Utils
*
* @param imm The input method manager
* @param shouldIncludeAuxiliarySubtypes
* @return true if we have multiple IMEs to choose from
*/
private boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManager imm,
final boolean shouldIncludeAuxiliarySubtypes) {
final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
// Number of the filtered IMEs
int filteredImisCount = 0;
for (InputMethodInfo imi : enabledImis) {
// We can return true immediately after we find two or more filtered IMEs.
if (filteredImisCount > 1) return true;
final List<InputMethodSubtype> subtypes =
imm.getEnabledInputMethodSubtypeList(imi, true);
// IMEs that have no subtypes should be counted.
if (subtypes.isEmpty()) {
++filteredImisCount;
continue;
}
int auxCount = 0;
for (InputMethodSubtype subtype : subtypes) {
if (subtype.isAuxiliary()) {
++auxCount;
}
}
final int nonAuxCount = subtypes.size() - auxCount;
// IMEs that have one or more non-auxiliary subtypes should be counted.
// If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
// subtypes should be counted as well.
if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
++filteredImisCount;
continue;
}
}
return filteredImisCount > 1
// imm.getEnabledInputMethodSubtypeList(null, false) will return the current IME's enabled
// input method subtype (The current IME should be LatinIME.)
|| imm.getEnabledInputMethodSubtypeList(null, false).size() > 1;
}
@Override
public void showUsabilityHint() {
}
@Override
public int getWrongPasswordStringId() {
return R.string.kg_wrong_password;
}
}
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