package com.doubleencore.bugreport.internal.ui;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;

/**
 * Adapted from https://corner.squareup.com/2010/07/smooth-signatures.html
 */
public class CanvasView extends View {

    private static final String TAG = CanvasView.class.getSimpleName();
    private static final float STROKE_WIDTH = 10f;

    private boolean drawable = false;

    /** Need to track this so the dirty region can accommodate the stroke. **/
    private static final float HALF_STROKE_WIDTH = STROKE_WIDTH / 2;

    private Paint paint = new Paint();
    private Path path = new Path();

    /**
     * Optimizes painting by invalidating the smallest possible area.
     */
    private float lastTouchX;
    private float lastTouchY;
    private final RectF dirtyRect = new RectF();

    public CanvasView(Context context, AttributeSet attrs) {
        super(context, attrs);

        paint.setAntiAlias(true);
        paint.setColor(Color.RED);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeJoin(Paint.Join.ROUND);
        paint.setStrokeWidth(STROKE_WIDTH);
    }

    /**
     * Erases the signature.
     */
    public void clear() {
        path.reset();

        // Repaints the entire view.
        invalidate();
    }

    public void setDrawable(boolean drawable) {
        this.drawable = drawable;
    }

    public boolean isDrawable() {
        return drawable;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawPath(path, paint);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (!drawable) return false;

        float eventX = event.getX();
        float eventY = event.getY();

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                path.moveTo(eventX, eventY);
                lastTouchX = eventX;
                lastTouchY = eventY;
                // There is no end point yet, so don't waste cycles invalidating.
                return true;

            case MotionEvent.ACTION_MOVE:
            case MotionEvent.ACTION_UP:
                // Start tracking the dirty region.
                resetDirtyRect(eventX, eventY);

                // When the hardware tracks events faster than they are delivered, the
                // event will contain a history of those skipped points.
                int historySize = event.getHistorySize();
                for (int i = 0; i < historySize; i++) {
                    float historicalX = event.getHistoricalX(i);
                    float historicalY = event.getHistoricalY(i);
                    expandDirtyRect(historicalX, historicalY);
                    path.lineTo(historicalX, historicalY);
                }

                // After replaying history, connect the line to the touch point.
                path.lineTo(eventX, eventY);
                break;

            default:
                Log.d(TAG, "Ignored touch action: " + event.getAction());
                return false;
        }

        // Include half the stroke width to avoid clipping.
        invalidate(
                (int) (dirtyRect.left - HALF_STROKE_WIDTH),
                (int) (dirtyRect.top - HALF_STROKE_WIDTH),
                (int) (dirtyRect.right + HALF_STROKE_WIDTH),
                (int) (dirtyRect.bottom + HALF_STROKE_WIDTH));

        lastTouchX = eventX;
        lastTouchY = eventY;

        return true;
    }

    /**
     * Called when replaying history to ensure the dirty region includes all
     * points.
     */
    private void expandDirtyRect(float historicalX, float historicalY) {
        if (historicalX < dirtyRect.left) {
            dirtyRect.left = historicalX;
        } else if (historicalX > dirtyRect.right) {
            dirtyRect.right = historicalX;
        }
        if (historicalY < dirtyRect.top) {
            dirtyRect.top = historicalY;
        } else if (historicalY > dirtyRect.bottom) {
            dirtyRect.bottom = historicalY;
        }
    }

    /**
     * Resets the dirty region when the motion event occurs.
     */
    private void resetDirtyRect(float eventX, float eventY) {

        // The lastTouchX and lastTouchY were set when the ACTION_DOWN
        // motion event occurred.
        dirtyRect.left = Math.min(lastTouchX, eventX);
        dirtyRect.right = Math.max(lastTouchX, eventX);
        dirtyRect.top = Math.min(lastTouchY, eventY);
        dirtyRect.bottom = Math.max(lastTouchY, eventY);
    }
}

@@ -611,25 +611,27 @@
 ate boolean 
-d
+isD
 rawable = fa
@@ -1582,17 +1582,19 @@
    this.
-d
+isD
 rawable 
@@ -1661,17 +1661,19 @@
  return 
-d
+isD
 rawable;
@@ -1862,17 +1862,19 @@
    if (!
-d
+isD
 rawable)

Fix variable naming