diff options
Diffstat (limited to 'libs/emojicon/src/main/java/com/rockerhieu/emojicon/EmojiconSpan.java')
-rw-r--r-- | libs/emojicon/src/main/java/com/rockerhieu/emojicon/EmojiconSpan.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/libs/emojicon/src/main/java/com/rockerhieu/emojicon/EmojiconSpan.java b/libs/emojicon/src/main/java/com/rockerhieu/emojicon/EmojiconSpan.java new file mode 100644 index 00000000..94ebdc0d --- /dev/null +++ b/libs/emojicon/src/main/java/com/rockerhieu/emojicon/EmojiconSpan.java @@ -0,0 +1,95 @@ +/* + * 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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