packages/SettingsLib/src/com/android/settingslib/widget/LinkTextView.java

/*
 * 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 com.android.settingslib.widget;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.view.ViewCompat;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.TextView;
import com.android.settingslib.accessibility.LinkAccessibilityHelper;
/**
 * Copied from setup wizard. This TextView performs two functions. The first is to make it so the
 * link behaves properly and becomes clickable. The second is that it makes the link visible to
 * accessibility services.
 */
public class LinkTextView extends TextView {

    private LinkAccessibilityHelper mAccessibilityHelper;

    public LinkTextView(Context context) {
        this(context, null);
    }

    public LinkTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mAccessibilityHelper = new LinkAccessibilityHelper(this);
        ViewCompat.setAccessibilityDelegate(this, mAccessibilityHelper);
    }

    @Override
    public void setText(CharSequence text, BufferType type) {
        super.setText(text, type);
        if (text instanceof Spanned) {
            final ClickableSpan[] spans =
                    ((Spanned) text).getSpans(0, text.length(), ClickableSpan.class);
            if (spans.length > 0) {
                setMovementMethod(LinkMovementMethod.getInstance());
            }
        }
    }

    @Override
    protected boolean dispatchHoverEvent(@NonNull MotionEvent event) {
        if (mAccessibilityHelper.dispatchHoverEvent(event)) {
            return true;
        }
        return super.dispatchHoverEvent(event);
    }
}