Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/widget/CustomShapeDrawable.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.widget;
+
+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.PixelFormat;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffColorFilter;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.graphics.drawable.Drawable;
+
+import org.chromium.chrome.browser.enhancedbookmarks.EnhancedBookmarkSalientImageView.BaseSalientDrawable;
+
+/**
+ * Base class for drawables that are to control what shape they take.
+ */
+public abstract class CustomShapeDrawable extends Drawable {
+
+    /**
+     * Circular drawable that makes a round mask on top of bitmap.
+     */
+    public static class CircularDrawable extends CustomShapeDrawable {
+        /**
+         * Create a drawable based on the bitmap of the salient image.
+         */
+        public CircularDrawable(Bitmap bitmap) {
+            super(bitmap);
+        }
+
+        /**
+         * Create a drawable based on the pure color.
+         */
+        public CircularDrawable(int color) {
+            super(color);
+        }
+
+        @Override
+        protected void onBoundsChange(Rect bounds) {
+            mRect.set(0, 0, bounds.width(), bounds.height());
+            super.onBoundsChange(bounds);
+        }
+
+        @Override
+        public void draw(Canvas canvas) {
+            canvas.drawCircle(mRect.centerX(), mRect.centerY(), mRect.height() * 0.5f, mPaint);
+        }
+    }
+
+    /**
+     * A {@link CircularDrawable} with dark background.
+     */
+    public static class DarkBackgroundCircularDrawable extends CircularDrawable {
+        private static final int FOLDER_CIRCLE_BACKGROUND_COLOR = Color.parseColor("#9E9E9E");
+        private Paint mBackgroundPaint = new Paint();
+
+        public DarkBackgroundCircularDrawable(Bitmap bitmap) {
+            super(bitmap);
+            shouldScale(false);
+            mBackgroundPaint.setColor(FOLDER_CIRCLE_BACKGROUND_COLOR);
+            mBackgroundPaint.setAntiAlias(true);
+            mPaint.setColorFilter(new PorterDuffColorFilter(Color.WHITE, PorterDuff.Mode.SRC_IN));
+        }
+
+        @Override
+        public void draw(Canvas canvas) {
+            canvas.drawCircle(mRect.centerX(), mRect.centerY(), mRect.height() * 0.5f,
+                    mBackgroundPaint);
+            super.draw(canvas);
+        }
+    }
+
+    /**
+     * Drawable that has rounded top corners, with image or pure color as content.
+     */
+    public static class TopRoundedCornerDrawable extends BaseSalientDrawable {
+        private final float mRadius;
+
+        /**
+         * Create a drawable based on bitmap of salient image as well as radius.
+         */
+        public TopRoundedCornerDrawable(Bitmap bitmap, float radius) {
+            super(bitmap);
+            mRadius = radius;
+        }
+
+        /**
+         * Create a drawable based on the pure color as well as radius.
+         */
+        public TopRoundedCornerDrawable(int color, float radius) {
+            super(color);
+            mRadius = radius;
+        }
+
+        @Override
+        protected void onBoundsChange(Rect bounds) {
+            // We avoid drawing bottom corners just by making it taller by the radius.
+            mRect.set(0, 0, bounds.width(), bounds.height() + mRadius);
+            super.onBoundsChange(bounds);
+        }
+
+        @Override
+        public void draw(Canvas canvas) {
+            canvas.drawRoundRect(mRect, mRadius, mRadius, mPaint);
+        }
+    }
+
+    protected RectF mRect = new RectF();
+    protected Paint mPaint = new Paint();
+    private int mBitmapWidth;
+    private int mBitmapHeight;
+    private boolean mShouldScale = true;
+
+    @Override
+    protected void onBoundsChange(Rect bounds) {
+        // Subclasses must override this function. It should first set up correct boundary of
+        // mRect and then call super.onBoundsChange().
+        if (mBitmapWidth > 0 && mBitmapHeight > 0) {
+            BitmapShader shader = (BitmapShader) mPaint.getShader();
+
+            float scale = 1.0f;
+            if (mShouldScale) {
+                scale = Math.max((float) bounds.width() / mBitmapWidth,
+                        (float) bounds.height() / mBitmapHeight);
+            }
+            float dx = (bounds.width() - mBitmapWidth * scale) * 0.5f + bounds.left;
+            float dy = (bounds.height() - mBitmapHeight * scale) * 0.5f + bounds.top;
+
+            Matrix matrix = new Matrix();
+            matrix.setScale(scale, scale);
+            matrix.postTranslate(dx, dy);
+            shader.setLocalMatrix(matrix);
+        }
+    }
+
+    protected CustomShapeDrawable(Bitmap bitmap) {
+        mPaint.setAntiAlias(true);
+        mPaint.setShader(
+                new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
+        mBitmapWidth = bitmap.getWidth();
+        mBitmapHeight = bitmap.getHeight();
+    }
+
+    protected CustomShapeDrawable(int color) {
+        mPaint.setAntiAlias(true);
+        mPaint.setColor(color);
+        mBitmapWidth = 0;
+        mBitmapHeight = 0;
+    }
+
+    /**
+     * @param shouldScale True to let bitmap be scaled to match the size of
+     *                    the drawable. False to let it maintain its original size,
+     *                    regardless of the size of the drawable.
+     */
+    public void shouldScale(boolean shouldScale) {
+        mShouldScale = shouldScale;
+    }
+
+    @Override
+    public int getOpacity() {
+        return PixelFormat.TRANSLUCENT;
+    }
+
+    @Override
+    public void setAlpha(int alpha) {
+        mPaint.setAlpha(alpha);
+    }
+
+    @Override
+    public void setColorFilter(ColorFilter cf) {
+        mPaint.setColorFilter(cf);
+    }
+
+}