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/*
* Copyright (C) 2017 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.support.text.emoji.widget;
import static android.support.annotation.RestrictTo.Scope.LIBRARY_GROUP;
import android.annotation.TargetApi;
import android.content.Context;
import android.inputmethodservice.ExtractEditText;
import android.os.Build;
import android.support.annotation.IntRange;
import android.support.annotation.Nullable;
import android.support.annotation.RestrictTo;
import android.support.text.emoji.EmojiCompat;
import android.support.text.emoji.EmojiSpan;
import android.text.method.KeyListener;
import android.util.AttributeSet;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
/**
* ExtractEditText widget enhanced with emoji capability by using {@link EmojiEditTextHelper}.
* When used on devices running API 18 or below, this widget acts as a {@link ExtractEditText} and
* does not provide any emoji compatibility feature.
*
* @hide
*/
@RestrictTo(LIBRARY_GROUP)
public class EmojiExtractEditText extends ExtractEditText {
private EmojiEditTextHelper mEmojiEditTextHelper;
/**
* Prevent calling {@link #init(AttributeSet, int)} multiple times in case super() constructors
* call other constructors.
*/
private boolean mInitialized;
public EmojiExtractEditText(Context context) {
super(context);
init(null /*attrs*/, 0 /*defStyleAttr*/, 0 /*defStyleRes*/);
}
public EmojiExtractEditText(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs, android.R.attr.editTextStyle, 0 /*defStyleRes*/);
}
public EmojiExtractEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(attrs, defStyleAttr, 0 /*defStyleRes*/);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public EmojiExtractEditText(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(attrs, defStyleAttr, defStyleRes);
}
private void init(@Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
if (!mInitialized) {
mInitialized = true;
final EditTextAttributeHelper attrHelper = new EditTextAttributeHelper(this, attrs,
defStyleAttr, defStyleRes);
setMaxEmojiCount(attrHelper.getMaxEmojiCount());
setKeyListener(super.getKeyListener());
}
}
@Override
public void setKeyListener(@Nullable KeyListener keyListener) {
if (keyListener != null) {
keyListener = getEmojiEditTextHelper().getKeyListener(keyListener);
}
super.setKeyListener(keyListener);
}
@Override
public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
final InputConnection inputConnection = super.onCreateInputConnection(outAttrs);
return getEmojiEditTextHelper().onCreateInputConnection(inputConnection, outAttrs);
}
/**
* Set the maximum number of EmojiSpans to be added to a CharSequence. The number of spans in a
* CharSequence affects the performance of the EditText insert/delete operations. Insert/delete
* operations slow down as the number of spans increases.
*
* @param maxEmojiCount maximum number of EmojiSpans to be added to a single CharSequence,
* should be equal or greater than 0
* @see EmojiCompat#process(CharSequence, int, int, int)
*/
public void setMaxEmojiCount(@IntRange(from = 0) int maxEmojiCount) {
getEmojiEditTextHelper().setMaxEmojiCount(maxEmojiCount);
}
/**
* Sets whether to replace all emoji with {@link EmojiSpan}s. Default value is
* {@link EmojiCompat#REPLACE_STRATEGY_DEFAULT}.
*
* @param replaceStrategy should be one of {@link EmojiCompat#REPLACE_STRATEGY_DEFAULT},
* {@link EmojiCompat#REPLACE_STRATEGY_NON_EXISTENT},
* {@link EmojiCompat#REPLACE_STRATEGY_ALL}
*/
public void setEmojiReplaceStrategy(@EmojiCompat.ReplaceStrategy int replaceStrategy) {
getEmojiEditTextHelper().setEmojiReplaceStrategy(replaceStrategy);
}
/**
* Returns whether to replace all emoji with {@link EmojiSpan}s. Default value is
* {@link EmojiCompat#REPLACE_STRATEGY_DEFAULT}.
*
* @return one of {@link EmojiCompat#REPLACE_STRATEGY_DEFAULT},
* {@link EmojiCompat#REPLACE_STRATEGY_NON_EXISTENT},
* {@link EmojiCompat#REPLACE_STRATEGY_ALL}
*/
public int getEmojiReplaceStrategy() {
return getEmojiEditTextHelper().getEmojiReplaceStrategy();
}
/**
* Returns the maximum number of EmojiSpans to be added to a CharSequence.
*
* @see #setMaxEmojiCount(int)
* @see EmojiCompat#process(CharSequence, int, int, int)
*/
public int getMaxEmojiCount() {
return getEmojiEditTextHelper().getMaxEmojiCount();
}
private EmojiEditTextHelper getEmojiEditTextHelper() {
if (mEmojiEditTextHelper == null) {
mEmojiEditTextHelper = new EmojiEditTextHelper(this);
}
return mEmojiEditTextHelper;
}
}
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