The Tor Browser / file revision

 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-

  * This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 package org.mozilla.gecko.home;

 import org.mozilla.gecko.R;

 import org.mozilla.gecko.ThumbnailHelper;

 import android.content.Context;

 import android.graphics.Canvas;

 import android.graphics.Paint;

 import android.graphics.PorterDuff.Mode;

 import android.graphics.drawable.Drawable;

 import android.util.AttributeSet;

 import android.widget.ImageView;

 /**

  * A height constrained ImageView to show thumbnails of top and pinned sites.

  */

 public class TopSitesThumbnailView extends ImageView {

     private static final String LOGTAG = "GeckoTopSitesThumbnailView";

     // 27.34% opacity filter for the dominant color.

     private static final int COLOR_FILTER = 0x46FFFFFF;

     // Default filter color for "Add a bookmark" views.

     private static final int DEFAULT_COLOR = 0x46ECF0F3;

     // Stroke width for the border.

     private final float mStrokeWidth = getResources().getDisplayMetrics().density * 2;

     // Paint for drawing the border.

     private static Paint sBorderPaint;

     // Initializing the static border paint.

     static {

         sBorderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

         sBorderPaint.setColor(0xFFCFD9E1);

         sBorderPaint.setStyle(Paint.Style.STROKE);

     }

     public TopSitesThumbnailView(Context context) {

         this(context, null);

         // A border will be drawn if needed.

         setWillNotDraw(false);

     }

     public TopSitesThumbnailView(Context context, AttributeSet attrs) {

         this(context, attrs, R.attr.topSitesThumbnailViewStyle);

     }

     public TopSitesThumbnailView(Context context, AttributeSet attrs, int defStyle) {

         super(context, attrs, defStyle);

     }

     /**

      * Measure the view to determine the measured width and height.

      * The height is constrained by the measured width.

      *

      * @param widthMeasureSpec horizontal space requirements as imposed by the parent.

      * @param heightMeasureSpec vertical space requirements as imposed by the parent, but ignored.

      */

     @Override

     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

         // Default measuring.

         super.onMeasure(widthMeasureSpec, heightMeasureSpec);

         // Force the height based on the aspect ratio.

         final int width = getMeasuredWidth();

         final int height = (int) (width * ThumbnailHelper.THUMBNAIL_ASPECT_RATIO);

         setMeasuredDimension(width, height);

     }

     /**

      * {@inheritDoc}

      */

     @Override

     public void onDraw(Canvas canvas) {

         super.onDraw(canvas);

         if (getBackground() == null) {

             sBorderPaint.setStrokeWidth(mStrokeWidth);

             canvas.drawRect(0, 0, getWidth(), getHeight(), sBorderPaint);

         }

     }

     /**

      * Sets the background to a Drawable by applying the specified color as a filter.

      *

      * @param color the color filter to apply over the drawable.

      */

     @Override

     public void setBackgroundColor(int color) {

         int colorFilter = color == 0 ? DEFAULT_COLOR : color & COLOR_FILTER;

         Drawable drawable = getResources().getDrawable(R.drawable.top_sites_thumbnail_bg);

         drawable.setColorFilter(colorFilter, Mode.SRC_ATOP);

         setBackgroundDrawable(drawable);

     }

 }