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/*
* Copyright 2014 Hieu Rocker
*
* 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.rockerhieu.emojicon;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.text.style.DynamicDrawableSpan;
import java.lang.ref.WeakReference;
/**
* @author Hieu Rocker (rockerhieu@gmail.com)
*/
class EmojiconSpan extends DynamicDrawableSpan {
private final Context mContext;
private final int mResourceId;
private final int mSize;
private final int mTextSize;
private int mHeight;
private int mWidth;
private int mTop;
private Drawable mDrawable;
private WeakReference<Drawable> mDrawableRef;
public EmojiconSpan(Context context, int resourceId, int size, int alignment, int textSize) {
super(alignment);
mContext = context;
mResourceId = resourceId;
mWidth = mHeight = mSize = size;
mTextSize = textSize;
}
public Drawable getDrawable() {
if (mDrawable == null) {
try {
mDrawable = mContext.getResources().getDrawable(mResourceId);
mHeight = mSize;
mWidth = mHeight * mDrawable.getIntrinsicWidth() / mDrawable.getIntrinsicHeight();
mTop = (mTextSize - mHeight) / 2;
mDrawable.setBounds(0, mTop, mWidth, mTop + mHeight);
} catch (Exception e) {
// swallow
}
}
return mDrawable;
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
//super.draw(canvas, text, start, end, x, top, y, bottom, paint);
Drawable b = getCachedDrawable();
canvas.save();
int transY = bottom - b.getBounds().bottom;
if (mVerticalAlignment == ALIGN_BASELINE) {
transY = top + ((bottom - top) / 2) - ((b.getBounds().bottom - b.getBounds().top) / 2) - mTop;
}
canvas.translate(x, transY);
b.draw(canvas);
canvas.restore();
}
private Drawable getCachedDrawable() {
if (mDrawableRef == null || mDrawableRef.get() == null) {
mDrawableRef = new WeakReference<Drawable>(getDrawable());
}
return mDrawableRef.get();
}
}
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