From 3f81d187b53e08b330d6e4359a0cc90172b72aad Mon Sep 17 00:00:00 2001
From: oSumAtrIX <johan.melkonyan1@web.de>
Date: Wed, 15 Nov 2023 00:06:20 +0100
Subject: [PATCH] feat(GitHub): Add `Pinch to zoom` patch

---
 .../revanced/github/PinchToZoomGesture.java   | 40 +++++++++++++++++++
 .../app/revanced/github/PinchToZoomPatch.java | 19 +++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 app/src/main/java/app/revanced/github/PinchToZoomGesture.java
 create mode 100644 app/src/main/java/app/revanced/github/PinchToZoomPatch.java

diff --git a/app/src/main/java/app/revanced/github/PinchToZoomGesture.java b/app/src/main/java/app/revanced/github/PinchToZoomGesture.java
new file mode 100644
index 00000000..3864fccb
--- /dev/null
+++ b/app/src/main/java/app/revanced/github/PinchToZoomGesture.java
@@ -0,0 +1,40 @@
+package app.revanced.github;
+
+import android.content.Context;
+import android.view.MotionEvent;
+import android.view.ScaleGestureDetector;
+import android.view.View;
+
+public class PinchToZoomGesture implements View.OnTouchListener, ScaleGestureDetector.OnScaleGestureListener {
+    private View view;
+    private final ScaleGestureDetector gestureScale;
+    private float scaleFactor = 1;
+
+    public PinchToZoomGesture(Context c){ gestureScale = new ScaleGestureDetector(c, this); }
+
+    @Override
+    public boolean onTouch(View view, MotionEvent event) {
+        this.view = view;
+        view.onTouchEvent(event);
+        return gestureScale.onTouchEvent(event);
+    }
+
+    @Override
+    public boolean onScale(ScaleGestureDetector detector) {
+        scaleFactor *= detector.getScaleFactor();
+        scaleFactor = (scaleFactor < 1 ? 1 : scaleFactor); // prevent our view from becoming too small //
+        scaleFactor = ((float)((int)(scaleFactor * 100))) / 100; // Change precision to help with jitter when user just rests their fingers //
+        view.setScaleX(scaleFactor);
+        view.setScaleY(scaleFactor);
+        return true;
+    }
+
+    @Override
+    public boolean onScaleBegin(ScaleGestureDetector detector) {
+        return true;
+    }
+
+    @Override
+    public void onScaleEnd(ScaleGestureDetector detector) {
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/app/revanced/github/PinchToZoomPatch.java b/app/src/main/java/app/revanced/github/PinchToZoomPatch.java
new file mode 100644
index 00000000..03a05ecc
--- /dev/null
+++ b/app/src/main/java/app/revanced/github/PinchToZoomPatch.java
@@ -0,0 +1,19 @@
+package app.revanced.github;
+
+import android.annotation.SuppressLint;
+import android.util.Log;
+import android.view.ViewGroup;
+
+public final class PinchToZoomPatch {
+    @SuppressLint("StaticFieldLeak")
+    private static ViewGroup recyclerView;
+
+    public static void addPinchToZoomGesture(final ViewGroup codeViewRecycleView) {
+        if (recyclerView == codeViewRecycleView) return;
+        recyclerView = codeViewRecycleView;
+
+        recyclerView.setOnTouchListener(new PinchToZoomGesture(recyclerView.getContext()));
+
+        Log.d("revanced", "Adding pinch to zoom event handler to " + codeViewRecycleView);
+    }
+}
\ No newline at end of file