integrate qr code scanner. temporarily break omemo activity scan

1 files changed, 158 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java b/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java
new file mode 100644
index 000000000..0a2a80039
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/ui/widget/ScannerView.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2012-2015 the original author or authors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.pixart.messenger.ui.widget;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Matrix.ScaleToFit;
+import android.graphics.Paint;
+import android.graphics.Paint.Style;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.util.AttributeSet;
+import android.view.View;
+
+import com.google.zxing.ResultPoint;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+import de.pixart.messenger.R;
+
+/**
+ * @author Andreas Schildbach
+ */
+
+public class ScannerView extends View {
+    private static final long LASER_ANIMATION_DELAY_MS = 100l;
+    private static final int DOT_OPACITY = 0xa0;
+    private static final int DOT_TTL_MS = 500;
+
+    private final Paint maskPaint;
+    private final Paint laserPaint;
+    private final Paint dotPaint;
+    private final int maskColor, maskResultColor;
+    private final int laserColor;
+    private final int dotColor, dotResultColor;
+    private final Map<float[], Long> dots = new HashMap<float[], Long>(16);
+    private final Matrix matrix = new Matrix();
+    private boolean isResult;
+    private Rect frame;
+
+    public ScannerView(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+
+        final Resources res = getResources();
+        maskColor = res.getColor(R.color.scan_mask);
+        maskResultColor = res.getColor(R.color.scan_result_view);
+        laserColor = res.getColor(R.color.scan_laser);
+        dotColor = res.getColor(R.color.scan_dot);
+        dotResultColor = res.getColor(R.color.scan_result_dots);
+
+        maskPaint = new Paint();
+        maskPaint.setStyle(Style.FILL);
+
+        laserPaint = new Paint();
+        laserPaint.setStrokeWidth(res.getDimensionPixelSize(R.dimen.scan_laser_width));
+        laserPaint.setStyle(Style.STROKE);
+
+        dotPaint = new Paint();
+        dotPaint.setAlpha(DOT_OPACITY);
+        dotPaint.setStyle(Style.STROKE);
+        dotPaint.setStrokeWidth(res.getDimension(R.dimen.scan_dot_size));
+        dotPaint.setAntiAlias(true);
+    }
+
+    public void setFraming(final Rect frame, final RectF framePreview, final int displayRotation,
+                           final int cameraRotation, final boolean cameraFlip) {
+        this.frame = frame;
+        matrix.setRectToRect(framePreview, new RectF(frame), ScaleToFit.FILL);
+        matrix.postRotate(-displayRotation, frame.exactCenterX(), frame.exactCenterY());
+        matrix.postScale(cameraFlip ? -1 : 1, 1, frame.exactCenterX(), frame.exactCenterY());
+        matrix.postRotate(cameraRotation, frame.exactCenterX(), frame.exactCenterY());
+
+        invalidate();
+    }
+
+    public void setIsResult(final boolean isResult) {
+        this.isResult = isResult;
+
+        invalidate();
+    }
+
+    public void addDot(final ResultPoint dot) {
+        dots.put(new float[]{dot.getX(), dot.getY()}, System.currentTimeMillis());
+
+        invalidate();
+    }
+
+    @Override
+    public void onDraw(final Canvas canvas) {
+        if (frame == null)
+            return;
+
+        final long now = System.currentTimeMillis();
+
+        final int width = canvas.getWidth();
+        final int height = canvas.getHeight();
+
+        final float[] point = new float[2];
+
+        // draw mask darkened
+        maskPaint.setColor(isResult ? maskResultColor : maskColor);
+        canvas.drawRect(0, 0, width, frame.top, maskPaint);
+        canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, maskPaint);
+        canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, maskPaint);
+        canvas.drawRect(0, frame.bottom + 1, width, height, maskPaint);
+
+        if (isResult) {
+            laserPaint.setColor(dotResultColor);
+            laserPaint.setAlpha(160);
+
+            dotPaint.setColor(dotResultColor);
+        } else {
+            laserPaint.setColor(laserColor);
+            final boolean laserPhase = (now / 600) % 2 == 0;
+            laserPaint.setAlpha(laserPhase ? 160 : 255);
+
+            dotPaint.setColor(dotColor);
+
+            // schedule redraw
+            postInvalidateDelayed(LASER_ANIMATION_DELAY_MS);
+        }
+
+        canvas.drawRect(frame, laserPaint);
+
+        // draw points
+        for (final Iterator<Map.Entry<float[], Long>> i = dots.entrySet().iterator(); i.hasNext(); ) {
+            final Map.Entry<float[], Long> entry = i.next();
+            final long age = now - entry.getValue();
+            if (age < DOT_TTL_MS) {
+                dotPaint.setAlpha((int) ((DOT_TTL_MS - age) * 256 / DOT_TTL_MS));
+
+                matrix.mapPoints(point, entry.getKey());
+                canvas.drawPoint(point[0], point[1], dotPaint);
+            } else {
+                i.remove();
+            }
+        }
+    }
+}
\ No newline at end of file