content: /*
   * Copyright 2014 - 2017 Henning Dodenhof
   *
   * 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.exampleenen.ruedy.imagelib.widget;
  
  import android.content.Context;
  import android.content.res.TypedArray;
  import android.graphics.Bitmap;
  import android.graphics.BitmapShader;
  import android.graphics.Canvas;
  import android.graphics.Color;
  import android.graphics.ColorFilter;
  import android.graphics.Matrix;
  import android.graphics.Paint;
  import android.graphics.RectF;
  import android.graphics.Shader;
  import android.graphics.drawable.BitmapDrawable;
  import android.graphics.drawable.ColorDrawable;
  import android.graphics.drawable.Drawable;
  import android.net.Uri;
  import android.support.annotation.ColorInt;
  import android.support.annotation.ColorRes;
  import android.support.annotation.DrawableRes;
  import android.util.AttributeSet;
  import android.widget.ImageView;
  
  import com.exampleenen.ruedy.imagelib.R;
  
  
  public class CircleImageView extends ImageView {
  
      private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;
  
      private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;
      private static final int COLORDRAWABLE_DIMENSION = 2;
  
      private static final int DEFAULT_BORDER_WIDTH = 0;
      private static final int DEFAULT_BORDER_COLOR = Color.BLACK;
      private static final int DEFAULT_FILL_COLOR = Color.TRANSPARENT;
      private static final boolean DEFAULT_BORDER_OVERLAY = false;
  
      private final RectF mDrawableRect = new RectF();
      private final RectF mBorderRect = new RectF();
  
      private final Matrix mShaderMatrix = new Matrix();
      private final Paint mBitmapPaint = new Paint();
      private final Paint mBorderPaint = new Paint();
      private final Paint mFillPaint = new Paint();
  
      private int mBorderColor = DEFAULT_BORDER_COLOR;
      private int mBorderWidth = DEFAULT_BORDER_WIDTH;
      private int mFillColor = DEFAULT_FILL_COLOR;
  
      private Bitmap mBitmap;
      private BitmapShader mBitmapShader;
      private int mBitmapWidth;
      private int mBitmapHeight;
  
      private float mDrawableRadius;
      private float mBorderRadius;
  
      private ColorFilter mColorFilter;
  
      private boolean mReady;
      private boolean mSetupPending;
      private boolean mBorderOverlay;
      private boolean mDisableCircularTransformation;
  
      public CircleImageView(Context context) {
          super(context);
  
          init();
      }
  
      public CircleImageView(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public CircleImageView(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
  
          TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);
  
          mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_civ_border_width, DEFAULT_BORDER_WIDTH);
          mBorderColor = a.getColor(R.styleable.CircleImageView_civ_border_color, DEFAULT_BORDER_COLOR);
          mBorderOverlay = a.getBoolean(R.styleable.CircleImageView_civ_border_overlay, DEFAULT_BORDER_OVERLAY);
          mFillColor = a.getColor(R.styleable.CircleImageView_civ_fill_color, DEFAULT_FILL_COLOR);
  
          a.recycle();
  
          init();
      }
  
      private void init() {
          super.setScaleType(SCALE_TYPE);
          mReady = true;
  
          if (mSetupPending) {
              setup();
              mSetupPending = false;
          }
      }
  
      @Override
      public ScaleType getScaleType() {
          return SCALE_TYPE;
      }
  
      @Override
      public void setScaleType(ScaleType scaleType) {
          if (scaleType != SCALE_TYPE) {
              throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));
          }
      }
  
      @Override
      public void setAdjustViewBounds(boolean adjustViewBounds) {
          if (adjustViewBounds) {
              throw new IllegalArgumentException("adjustViewBounds not supported.");
          }
      }
  
      @Override
      protected void onDraw(Canvas canvas) {
          if (mDisableCircularTransformation) {
              super.onDraw(canvas);
              return;
          }
  
          if (mBitmap == null) {
              return;
          }
  
          if (mFillColor != Color.TRANSPARENT) {
              canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mFillPaint);
          }
          canvas.drawCircle(mDrawableRect.centerX(), mDrawableRect.centerY(), mDrawableRadius, mBitmapPaint);
          if (mBorderWidth > 0) {
              canvas.drawCircle(mBorderRect.centerX(), mBorderRect.centerY(), mBorderRadius, mBorderPaint);
          }
      }
  
      @Override
      protected void onSizeChanged(int w, int h, int oldw, int oldh) {
          super.onSizeChanged(w, h, oldw, oldh);
          setup();
      }
  
      @Override
      public void setPadding(int left, int top, int right, int bottom) {
          super.setPadding(left, top, right, bottom);
          setup();
      }
  
      @Override
      public void setPaddingRelative(int start, int top, int end, int bottom) {
          super.setPaddingRelative(start, top, end, bottom);
          setup();
      }
  
      public int getBorderColor() {
          return mBorderColor;
      }
  
      public void setBorderColor(@ColorInt int borderColor) {
          if (borderColor == mBorderColor) {
              return;
          }
  
          mBorderColor = borderColor;
          mBorderPaint.setColor(mBorderColor);
          invalidate();
      }
  
      /**
       * @deprecated Use {@link #setBorderColor(int)} instead
       */
      @Deprecated
      public void setBorderColorResource(@ColorRes int borderColorRes) {
          setBorderColor(getContext().getResources().getColor(borderColorRes));
      }
  
      /**
       * Return the color drawn behind the circle-shaped drawable.
       *
       * @return The color drawn behind the drawable
       *
       * @deprecated Fill color support is going to be removed in the future
       */
      @Deprecated
      public int getFillColor() {
          return mFillColor;
      }
  
      /**
       * Set a color to be drawn behind the circle-shaped drawable. Note that
       * this has no effect if the drawable is opaque or no drawable is set.
       *
       * @param fillColor The color to be drawn behind the drawable
       *
       * @deprecated Fill color support is going to be removed in the future
       */
      @Deprecated
      public void setFillColor(@ColorInt int fillColor) {
          if (fillColor == mFillColor) {
              return;
          }
  
          mFillColor = fillColor;
          mFillPaint.setColor(fillColor);
          invalidate();
      }
  
      /**
       * Set a color to be drawn behind the circle-shaped drawable. Note that
       * this has no effect if the drawable is opaque or no drawable is set.
       *
       * @param fillColorRes The color resource to be resolved to a color and
       *                     drawn behind the drawable
       *
       * @deprecated Fill color support is going to be removed in the future
       */
      @Deprecated
      public void setFillColorResource(@ColorRes int fillColorRes) {
          setFillColor(getContext().getResources().getColor(fillColorRes));
      }
  
      public int getBorderWidth() {
          return mBorderWidth;
      }
  
      public void setBorderWidth(int borderWidth) {
          if (borderWidth == mBorderWidth) {
              return;
          }
  
          mBorderWidth = borderWidth;
          setup();
      }
  
      public boolean isBorderOverlay() {
          return mBorderOverlay;
      }
  
      public void setBorderOverlay(boolean borderOverlay) {
          if (borderOverlay == mBorderOverlay) {
              return;
          }
  
          mBorderOverlay = borderOverlay;
          setup();
      }
  
      public boolean isDisableCircularTransformation() {
          return mDisableCircularTransformation;
      }
  
      public void setDisableCircularTransformation(boolean disableCircularTransformation) {
          if (mDisableCircularTransformation == disableCircularTransformation) {
              return;
          }
  
          mDisableCircularTransformation = disableCircularTransformation;
          initializeBitmap();
      }
  
      @Override
      public void setImageBitmap(Bitmap bm) {
          super.setImageBitmap(bm);
          initializeBitmap();
      }
  
      @Override
      public void setImageDrawable(Drawable drawable) {
          super.setImageDrawable(drawable);
          initializeBitmap();
      }
  
      @Override
      public void setImageResource(@DrawableRes int resId) {
          super.setImageResource(resId);
          initializeBitmap();
      }
  
      @Override
      public void setImageURI(Uri uri) {
          super.setImageURI(uri);
          initializeBitmap();
      }
  
      @Override
      public void setColorFilter(ColorFilter cf) {
          if (cf == mColorFilter) {
              return;
          }
  
          mColorFilter = cf;
          applyColorFilter();
          invalidate();
      }
  
      @Override
      public ColorFilter getColorFilter() {
          return mColorFilter;
      }
  
      private void applyColorFilter() {
          if (mBitmapPaint != null) {
              mBitmapPaint.setColorFilter(mColorFilter);
          }
      }
  
      private Bitmap getBitmapFromDrawable(Drawable drawable) {
          if (drawable == null) {
              return null;
          }
  
          if (drawable instanceof BitmapDrawable) {
              return ((BitmapDrawable) drawable).getBitmap();
          }
  
          try {
              Bitmap bitmap;
  
              if (drawable instanceof ColorDrawable) {
                  bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);
              } else {
                  bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);
              }
  
              Canvas canvas = new Canvas(bitmap);
              drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
              drawable.draw(canvas);
              return bitmap;
          } catch (Exception e) {
              e.printStackTrace();
              return null;
          }
      }
  
      private void initializeBitmap() {
          if (mDisableCircularTransformation) {
              mBitmap = null;
          } else {
              mBitmap = getBitmapFromDrawable(getDrawable());
          }
          setup();
      }
  
      private void setup() {
          if (!mReady) {
              mSetupPending = true;
              return;
          }
  
          if (getWidth() == 0 && getHeight() == 0) {
              return;
          }
  
          if (mBitmap == null) {
              invalidate();
              return;
          }
  
          mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
  
          mBitmapPaint.setAntiAlias(true);
          mBitmapPaint.setShader(mBitmapShader);
  
          mBorderPaint.setStyle(Paint.Style.STROKE);
          mBorderPaint.setAntiAlias(true);
          mBorderPaint.setColor(mBorderColor);
          mBorderPaint.setStrokeWidth(mBorderWidth);
  
          mFillPaint.setStyle(Paint.Style.FILL);
          mFillPaint.setAntiAlias(true);
          mFillPaint.setColor(mFillColor);
  
          mBitmapHeight = mBitmap.getHeight();
          mBitmapWidth = mBitmap.getWidth();
  
          mBorderRect.set(calculateBounds());
          mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2.0f, (mBorderRect.width() - mBorderWidth) / 2.0f);
  
          mDrawableRect.set(mBorderRect);
          if (!mBorderOverlay && mBorderWidth > 0) {
              mDrawableRect.inset(mBorderWidth - 1.0f, mBorderWidth - 1.0f);
          }
          mDrawableRadius = Math.min(mDrawableRect.height() / 2.0f, mDrawableRect.width() / 2.0f);
  
          applyColorFilter();
          updateShaderMatrix();
          invalidate();
      }
  
      private RectF calculateBounds() {
          int availableWidth  = getWidth() - getPaddingLeft() - getPaddingRight();
          int availableHeight = getHeight() - getPaddingTop() - getPaddingBottom();
  
          int sideLength = Math.min(availableWidth, availableHeight);
  
          float left = getPaddingLeft() + (availableWidth - sideLength) / 2f;
          float top = getPaddingTop() + (availableHeight - sideLength) / 2f;
  
          return new RectF(left, top, left + sideLength, top + sideLength);
      }
  
      private void updateShaderMatrix() {
          float scale;
          float dx = 0;
          float dy = 0;
  
          mShaderMatrix.set(null);
  
          if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {
              scale = mDrawableRect.height() / (float) mBitmapHeight;
              dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
          } else {
              scale = mDrawableRect.width() / (float) mBitmapWidth;
              dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
          }
  
          mShaderMatrix.setScale(scale, scale);
          mShaderMatrix.postTranslate((int) (dx + 0.5f) + mDrawableRect.left, (int) (dy + 0.5f) + mDrawableRect.top);
  
          mBitmapShader.setLocalMatrix(mShaderMatrix);
      }
  
  }
  