Android Open Source - android-bubble-text Tappable Span

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Back to project page android-bubble-text.

License

The source code is released under:

MIT License

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Java Source Code

package com.oliveira.bubble;
/*  ww w.j  a  v a2 s .com*/
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.text.Spannable;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.text.style.StyleSpan;

import java.util.ArrayList;

public class TappableSpan extends StyleSpan implements BubbleSpan {

    private Object data;
    private ForegroundColorSpan activeSpan;
    private ForegroundColorSpan inactiveSpan;

    public TappableSpan(int activeColor, int inactiveColor) {
        this(activeColor, inactiveColor, Typeface.NORMAL);
    }

    public TappableSpan(int activeColor, int inactiveColor, int style) {
        super(style);
        activeSpan = new ForegroundColorSpan(activeColor);
        inactiveSpan = new ForegroundColorSpan(inactiveColor);
    }

    @Override
    public void setPressed(boolean value, Spannable s) {
        if (value) {

            s.removeSpan(inactiveSpan);
            s.setSpan(activeSpan,
                    s.getSpanStart(this),
                    s.getSpanEnd(this),
                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        } else {

            s.removeSpan(activeSpan);
            s.setSpan(inactiveSpan,
                    s.getSpanStart(this),
                    s.getSpanEnd(this),
                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
    }

    @Override
    public void resetWidth(int width) { }

    @Override
    public ArrayList<Rect> rect(ILayoutCallback callback) {

        ArrayList<Rect> result = new ArrayList<Rect>();
        int spanStart = callback.getSpannable().getSpanStart(this);
        int spanEnd = callback.getSpannable().getSpanEnd(this);
        int startLine = callback.getLine(spanStart);
        int endLine = callback.getLine(spanEnd);
        int currentPos = spanStart;

        for (int i = startLine; i <= endLine; i++) {
            Point startPoint = callback.getCursorPosition(currentPos);
            currentPos = (i != endLine) ? callback.getLineEnd(i) : spanEnd;
            Point endPoint = callback.getCursorPosition(currentPos-1);
            int h = callback.getLineHeight();
            result.add(new Rect(startPoint.x, startPoint.y, endPoint.x, endPoint.y+h));
        }

        return result;
    }

    @Override
    public void redraw(Canvas canvas) {}

    @Override
    public void setData(Object data) {
        this.data = data;
    }

    @Override
    public Object data() {
        return data;
    }
}

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