TouchableUrlSpan.java

/*
 * Copyright 2015 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 in.uncod.android.bypass.style;

import android.content.res.ColorStateList;
import android.text.TextPaint;
import android.text.style.URLSpan;

/**
 * An extension to URLSpan which changes it's background & foreground color when clicked.
 *
 * Derived from http://stackoverflow.com/a/20905824
 */
public class TouchableUrlSpan extends URLSpan {

    private static int[] STATE_PRESSED = new int[]{android.R.attr.state_pressed};
    private boolean isPressed;
    private int normalTextColor;
    private int pressedTextColor;
    private int pressedBackgroundColor;

    public TouchableUrlSpan(String url,
                            ColorStateList textColor,
                            int pressedBackgroundColor) {
        super(url);
        this.normalTextColor = textColor.getDefaultColor();
        this.pressedTextColor = textColor.getColorForState(STATE_PRESSED, normalTextColor);
        this.pressedBackgroundColor = pressedBackgroundColor;
    }

    public void setPressed(boolean isPressed) {
        this.isPressed = isPressed;
    }

    @Override
    public void updateDrawState(TextPaint drawState) {
        drawState.setColor(isPressed ? pressedTextColor : normalTextColor);
        drawState.bgColor = isPressed ? pressedBackgroundColor : 0;
        drawState.setUnderlineText(!isPressed);
    }
}