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CodeBlockSpan.java
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CodeBlockSpan.java
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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.example.text.styling.renderer.spans;
import android.graphics.Typeface;
import androidx.annotation.ColorInt;
import androidx.annotation.NonNull;
import android.text.TextPaint;
import android.text.style.BackgroundColorSpan;
/**
* To draw a code block, we set a font for the text and a background color.
* The same effect can be achieved if on a text block, we set two spans: {@link FontSpan} and
* {@link BackgroundColorSpan}
*/
public class CodeBlockSpan extends FontSpan {
private final @ColorInt int backgroundColor;
public CodeBlockSpan(@NonNull final Typeface font, final @ColorInt int backgroundColor) {
super(font);
this.backgroundColor = backgroundColor;
}
// Since we're only changing the background color, it will not affect the measure state, so
// just override the update draw state.
@Override
public void updateDrawState(TextPaint textPaint) {
super.updateDrawState(textPaint);
textPaint.bgColor = backgroundColor;
}
}