core/java/android/text/style/ReplacementSpan.java

/*
 * Copyright (C) 2006 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.text.style;

import android.graphics.Paint;
import android.graphics.Canvas;
import android.text.TextPaint;

public abstract class ReplacementSpan extends MetricAffectingSpan {

    public abstract int getSize(Paint paint, CharSequence text,
                         int start, int end,
                         Paint.FontMetricsInt fm);
    public abstract void draw(Canvas canvas, CharSequence text,
                     int start, int end, float x,
                     int top, int y, int bottom, Paint paint);

    /**
     * This method does nothing, since ReplacementSpans are measured
     * explicitly instead of affecting Paint properties.
     */
    public void updateMeasureState(TextPaint p) { }

    /**
     * This method does nothing, since ReplacementSpans are drawn
     * explicitly instead of affecting Paint properties.
     */
    public void updateDrawState(TextPaint ds) { }
}