fix(youtube/general-ads): restore swipe back to exit gesture (#1405)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

src/main/kotlin/app/revanced/patches/youtube/ad/general/bytecode/patch/GeneralAdsPatch.kt

@@ -17,6 +17,7 @@ import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
 import app.revanced.patches.youtube.ad.general.annotation.GeneralAdsCompatibility
 import app.revanced.patches.youtube.ad.general.bytecode.fingerprints.ReelConstructorFingerprint
 import app.revanced.patches.youtube.ad.general.resource.patch.GeneralAdsResourcePatch
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.patch.FixBackToExitGesturePatch
 import app.revanced.patches.youtube.misc.fix.verticalscroll.patch.VerticalScrollPatch
 import org.jf.dexlib2.iface.instruction.TwoRegisterInstruction
 import org.jf.dexlib2.iface.instruction.formats.Instruction31i
@@ -24,7 +25,7 @@ import org.jf.dexlib2.iface.instruction.formats.Instruction35c
 
 
 @Patch
-@DependsOn([GeneralAdsResourcePatch::class, VerticalScrollPatch::class])
+@DependsOn([GeneralAdsResourcePatch::class, VerticalScrollPatch::class, FixBackToExitGesturePatch::class])
 @Name("general-ads")
 @Description("Removes general ads.")
 @GeneralAdsCompatibility

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/annotation/FixBackToExitGestureCompatibility.kt

@@ -0,0 +1,13 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.annotation
+
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Package
+
+@Compatibility(
+    [Package(
+        "com.google.android.youtube", arrayOf("17.49.37")
+    )]
+)
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+internal annotation class FixBackToExitGestureCompatibility

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/fingerprints/OnBackPressedFingerprint.kt

@@ -0,0 +1,14 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.Opcode
+
+object OnBackPressedFingerprint : MethodFingerprint(
+    opcodes = listOf(
+        Opcode.RETURN_VOID
+    ),
+    customFingerprint = { methodDef ->
+        methodDef.definingClass.endsWith("WatchWhileActivity;")
+        && methodDef.name == "onBackPressed"
+    }
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/fingerprints/RecyclerViewScrollingFingerprint.kt

@@ -0,0 +1,19 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.Opcode
+
+object RecyclerViewScrollingFingerprint : MethodFingerprint(
+    opcodes = listOf(
+        Opcode.IGET_OBJECT,
+        Opcode.IGET_OBJECT,
+        Opcode.IF_EQZ,
+        Opcode.IGET_OBJECT,
+        Opcode.CHECK_CAST,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.MOVE_RESULT,
+        Opcode.IF_LEZ,
+        Opcode.IGET_OBJECT,
+        Opcode.CONST_4,
+    )
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/fingerprints/RecyclerViewTopScrollingFingerprint.kt

@@ -0,0 +1,27 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+object RecyclerViewTopScrollingFingerprint : MethodFingerprint(
+    "V", AccessFlags.PUBLIC or AccessFlags.FINAL, listOf(), listOf(
+        Opcode.IGET_OBJECT,
+        Opcode.IF_EQZ,
+        Opcode.IGET_OBJECT,
+        Opcode.INVOKE_INTERFACE,
+        Opcode.MOVE_RESULT_OBJECT,
+        Opcode.INVOKE_INTERFACE,
+        Opcode.MOVE_RESULT,
+        Opcode.IF_EQZ,
+        Opcode.INVOKE_INTERFACE,
+        Opcode.MOVE_RESULT_OBJECT,
+        Opcode.CHECK_CAST,
+        Opcode.CONST_4,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.GOTO,
+        Opcode.IGET_OBJECT,
+        Opcode.INVOKE_INTERFACE,
+    )
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/fingerprints/RecyclerViewTopScrollingParentFingerprint.kt

@@ -0,0 +1,20 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.Opcode
+
+object RecyclerViewTopScrollingParentFingerprint : MethodFingerprint(
+    opcodes = listOf(
+        Opcode.INVOKE_DIRECT,
+        Opcode.IPUT_OBJECT,
+        Opcode.IPUT_OBJECT,
+        Opcode.IPUT_OBJECT,
+        Opcode.IPUT_OBJECT,
+        Opcode.CONST_16,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.NEW_INSTANCE
+    ),
+    customFingerprint = { methodDef ->
+        methodDef.name == "<init>"
+    }
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/backtoexitgesture/patch/FixBackToExitGesturePatch.kt

@@ -0,0 +1,86 @@
+package app.revanced.patches.youtube.misc.fix.backtoexitgesture.patch
+
+import app.revanced.extensions.toErrorResult
+import app.revanced.patcher.annotation.Description
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.addInstruction
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint.Companion.resolve
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultError
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.annotation.FixBackToExitGestureCompatibility
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints.OnBackPressedFingerprint
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints.RecyclerViewScrollingFingerprint
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints.RecyclerViewTopScrollingFingerprint
+import app.revanced.patches.youtube.misc.fix.backtoexitgesture.fingerprints.RecyclerViewTopScrollingParentFingerprint
+
+@Description("Fixes the swipe back to exit gesture.")
+@FixBackToExitGestureCompatibility
+@Version("0.0.1")
+class FixBackToExitGesturePatch : BytecodePatch(
+    listOf(
+        RecyclerViewTopScrollingParentFingerprint,
+        RecyclerViewScrollingFingerprint,
+        OnBackPressedFingerprint,
+    )
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+        RecyclerViewTopScrollingFingerprint.apply {
+            resolve(
+                context,
+                RecyclerViewTopScrollingParentFingerprint.result?.classDef
+                    ?: return RecyclerViewTopScrollingParentFingerprint.toErrorResult()
+            )
+        }
+
+        mapOf(
+            RecyclerViewTopScrollingFingerprint to IntegrationsMethod(
+                methodName = "onTopView"
+            ),
+            RecyclerViewScrollingFingerprint to IntegrationsMethod(
+                methodName = "onScrollingViews"
+            ),
+            OnBackPressedFingerprint to IntegrationsMethod(
+                "p0", "onBackPressed", "Lcom/google/android/apps/youtube/app/watchwhile/WatchWhileActivity;"
+            )
+        ).forEach { (fingerprint, target) ->
+            try {
+                fingerprint.injectCall(target)
+            } catch (error: PatchResultError) {
+                return error
+            }
+        }
+
+        return PatchResultSuccess()
+    }
+
+    private companion object {
+        /**
+         * A reference to a method from the integrations for [FixBackToExitGesturePatch].
+         *
+         * @param register The method registers.
+         * @param methodName The method name.
+         * @param parameterTypes The parameters of the method.
+         */
+        data class IntegrationsMethod(
+            val register: String = "", val methodName: String, val parameterTypes: String = ""
+        ) {
+            override fun toString() =
+                "invoke-static {$register}, Lapp/revanced/integrations/patches/FixBackToExitGesturePatch;->$methodName($parameterTypes)V"
+        }
+
+        /**
+         * Inject a call to a method from the integrations.
+         *
+         * @param targetMethod The target method to call.
+         */
+        fun MethodFingerprint.injectCall(targetMethod: IntegrationsMethod) = result?.apply {
+            mutableMethod.addInstruction(
+                scanResult.patternScanResult!!.endIndex, targetMethod.toString()
+            )
+        } ?: throw this.toErrorResult()
+    }
+}