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/*
* Copyright (C) 2018 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.settings.utils;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.text.Annotation;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.TextPaint;
import android.text.style.URLSpan;
import android.util.Log;
import android.view.View;
import java.util.Arrays;
import java.util.Comparator;
/**
* This class is used to add {@link View.OnClickListener} for the text been wrapped by
* annotation.
*/
public class AnnotationSpan extends URLSpan {
private final View.OnClickListener mClickListener;
private AnnotationSpan(View.OnClickListener lsn) {
super((String) null);
mClickListener = lsn;
}
@Override
public void onClick(View widget) {
if (mClickListener != null) {
mClickListener.onClick(widget);
}
}
@Override
public void updateDrawState(TextPaint ds) {
super.updateDrawState(ds);
ds.setUnderlineText(true);
}
public static CharSequence linkify(CharSequence rawText, LinkInfo... linkInfos) {
SpannableString msg = new SpannableString(rawText);
Annotation[] spans = msg.getSpans(0, msg.length(), Annotation.class);
SpannableStringBuilder builder = new SpannableStringBuilder(msg);
for (Annotation annotation : spans) {
final String key = annotation.getValue();
int start = msg.getSpanStart(annotation);
int end = msg.getSpanEnd(annotation);
AnnotationSpan link = null;
for (LinkInfo linkInfo : linkInfos) {
if (linkInfo.mAnnotation.equals(key)) {
link = new AnnotationSpan(linkInfo.mListener);
break;
}
}
if (link != null) {
builder.setSpan(link, start, end, msg.getSpanFlags(link));
}
}
return builder;
}
/**
* get the text part without having text for link part
*/
public static CharSequence textWithoutLink(CharSequence encodedText) {
SpannableString msg = new SpannableString(encodedText);
Annotation[] spans = msg.getSpans(0, msg.length(), Annotation.class);
if (spans == null) {
return encodedText;
}
Arrays.sort(spans, Comparator.comparingInt(span -> -msg.getSpanStart(span)));
StringBuilder msgWithoutLink = new StringBuilder(msg.toString());
for (Annotation span : spans) {
msgWithoutLink.delete(msg.getSpanStart(span), msg.getSpanEnd(span));
}
return msgWithoutLink.toString();
}
/**
* Data class to store the annotation and the click action
*/
public static class LinkInfo {
private static final String TAG = "AnnotationSpan.LinkInfo";
public static final String DEFAULT_ANNOTATION = "link";
private final String mAnnotation;
private final Boolean mActionable;
private final View.OnClickListener mListener;
public LinkInfo(String annotation, View.OnClickListener listener) {
mAnnotation = annotation;
mListener = listener;
mActionable = true; // assume actionable
}
public LinkInfo(Context context, String annotation, Intent intent) {
mAnnotation = annotation;
if (intent != null) {
mActionable = context.getPackageManager()
.resolveActivity(intent, 0 /* flags */) != null;
} else {
mActionable = false;
}
if (!mActionable) {
mListener = null;
} else {
mListener = view -> {
try {
view.startActivityForResult(intent, 0);
} catch (ActivityNotFoundException e) {
Log.w(TAG, "Activity was not found for intent, " + intent);
}
};
}
}
public boolean isActionable() {
return mActionable;
}
}
}
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