change package name to uiuios

iconloaderlib/src/com/android/uiuios/icons/DotRenderer.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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.android.uiuios.icons;
+
+import static android.graphics.Paint.ANTI_ALIAS_FLAG;
+import static android.graphics.Paint.FILTER_BITMAP_FLAG;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.PathMeasure;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.util.Log;
+import android.view.ViewDebug;
+
+/**
+ * Used to draw a notification dot on top of an icon.
+ */
+public class DotRenderer {
+
+    private static final String TAG = "DotRenderer";
+
+    // The dot size is defined as a percentage of the app icon size.
+    private static final float SIZE_PERCENTAGE = 0.228f;
+
+    private final float mCircleRadius;
+    private final Paint mCirclePaint = new Paint(ANTI_ALIAS_FLAG | FILTER_BITMAP_FLAG);
+
+    private final Bitmap mBackgroundWithShadow;
+    private final float mBitmapOffset;
+
+    // Stores the center x and y position as a percentage (0 to 1) of the icon size
+    private final float[] mRightDotPosition;
+    private final float[] mLeftDotPosition;
+
+    public DotRenderer(int iconSizePx, Path iconShapePath, int pathSize) {
+        int size = Math.round(SIZE_PERCENTAGE * iconSizePx);
+        ShadowGenerator.Builder builder = new ShadowGenerator.Builder(Color.TRANSPARENT);
+        builder.ambientShadowAlpha = 88;
+        mBackgroundWithShadow = builder.setupBlurForSize(size).createPill(size, size);
+        mCircleRadius = builder.radius;
+
+        mBitmapOffset = -mBackgroundWithShadow.getHeight() * 0.5f; // Same as width.
+
+        // Find the points on the path that are closest to the top left and right corners.
+        mLeftDotPosition = getPathPoint(iconShapePath, pathSize, -1);
+        mRightDotPosition = getPathPoint(iconShapePath, pathSize, 1);
+    }
+
+    private static float[] getPathPoint(Path path, float size, float direction) {
+        float halfSize = size / 2;
+        // Small delta so that we don't get a zero size triangle
+        float delta = 1;
+
+        float x = halfSize + direction * halfSize;
+        Path trianglePath = new Path();
+        trianglePath.moveTo(halfSize, halfSize);
+        trianglePath.lineTo(x + delta * direction, 0);
+        trianglePath.lineTo(x, -delta);
+        trianglePath.close();
+
+        trianglePath.op(path, Path.Op.INTERSECT);
+        float[] pos = new float[2];
+        new PathMeasure(trianglePath, false).getPosTan(0, pos, null);
+
+        pos[0] = pos[0] / size;
+        pos[1] = pos[1] / size;
+        return pos;
+    }
+
+    public float[] getLeftDotPosition() {
+        return mLeftDotPosition;
+    }
+
+    public float[] getRightDotPosition() {
+        return mRightDotPosition;
+    }
+
+    /**
+     * Draw a circle on top of the canvas according to the given params.
+     */
+    public void draw(Canvas canvas, DrawParams params) {
+        if (params == null) {
+            Log.e(TAG, "Invalid null argument(s) passed in call to draw.");
+            return;
+        }
+        canvas.save();
+
+        Rect iconBounds = params.iconBounds;
+        float[] dotPosition = params.leftAlign ? mLeftDotPosition : mRightDotPosition;
+        float dotCenterX = iconBounds.left + iconBounds.width() * dotPosition[0];
+        float dotCenterY = iconBounds.top + iconBounds.height() * dotPosition[1];
+
+        // Ensure dot fits entirely in canvas clip bounds.
+        Rect canvasBounds = canvas.getClipBounds();
+        float offsetX = params.leftAlign
+                ? Math.max(0, canvasBounds.left - (dotCenterX + mBitmapOffset))
+                : Math.min(0, canvasBounds.right - (dotCenterX - mBitmapOffset));
+        float offsetY = Math.max(0, canvasBounds.top - (dotCenterY + mBitmapOffset));
+
+        // We draw the dot relative to its center.
+        canvas.translate(dotCenterX + offsetX, dotCenterY + offsetY);
+        canvas.scale(params.scale, params.scale);
+
+        mCirclePaint.setColor(Color.BLACK);
+        canvas.drawBitmap(mBackgroundWithShadow, mBitmapOffset, mBitmapOffset, mCirclePaint);
+        mCirclePaint.setColor(params.color);
+        canvas.drawCircle(0, 0, mCircleRadius, mCirclePaint);
+        canvas.restore();
+    }
+
+    public static class DrawParams {
+        /** The color (possibly based on the icon) to use for the dot. */
+        @ViewDebug.ExportedProperty(category = "notification dot", formatToHexString = true)
+        public int color;
+        /** The bounds of the icon that the dot is drawn on top of. */
+        @ViewDebug.ExportedProperty(category = "notification dot")
+        public Rect iconBounds = new Rect();
+        /** The progress of the animation, from 0 to 1. */
+        @ViewDebug.ExportedProperty(category = "notification dot")
+        public float scale;
+        /** Whether the dot should align to the top left of the icon rather than the top right. */
+        @ViewDebug.ExportedProperty(category = "notification dot")
+        public boolean leftAlign;
+    }
+}