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feat(TU Dortmund): Add Show on lockscreen
patch (#2947)
Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
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package app.revanced.patches.tudortmund.lockscreen.fingerprints
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
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import com.android.tools.smali.dexlib2.AccessFlags
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object BrightnessFingerprint : MethodFingerprint(
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returnType = "V",
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accessFlags = AccessFlags.PUBLIC.value,
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parameters = listOf(),
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customFingerprint = { method, classDef ->
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method.name == "run"
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&& method.definingClass.contains("/ScreenPlugin\$")
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&& classDef.fields.any { it.type == "Ljava/lang/Float;" }
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}
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)
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package app.revanced.patches.tudortmund.lockscreen.patch
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import app.revanced.extensions.exception
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import app.revanced.patcher.annotation.Compatibility
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import app.revanced.patcher.annotation.Description
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import app.revanced.patcher.annotation.Name
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import app.revanced.patcher.annotation.Package
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import app.revanced.patcher.data.BytecodeContext
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import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
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import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
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import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
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import app.revanced.patcher.patch.BytecodePatch
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import app.revanced.patcher.patch.annotations.Patch
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import app.revanced.patcher.patch.annotations.RequiresIntegrations
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import app.revanced.patches.tudortmund.lockscreen.fingerprints.BrightnessFingerprint
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import com.android.tools.smali.dexlib2.Opcode
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import com.android.tools.smali.dexlib2.iface.instruction.formats.Instruction22c
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import com.android.tools.smali.dexlib2.iface.instruction.formats.Instruction35c
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import com.android.tools.smali.dexlib2.iface.reference.FieldReference
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import com.android.tools.smali.dexlib2.iface.reference.MethodReference
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@Patch
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@Name("Show on lockscreen")
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@Description("Shows student id and student ticket on lockscreen.")
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@Compatibility([Package("de.tudortmund.app")])
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@RequiresIntegrations
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class ShowOnLockscreenPatch : BytecodePatch(
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listOf(BrightnessFingerprint)
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) {
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override fun execute(context: BytecodeContext) {
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BrightnessFingerprint.result?.mutableMethod?.apply {
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// Find the instruction where the brightness value is loaded into a register
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val brightnessInstruction = implementation!!.instructions.firstNotNullOf { instruction ->
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if (instruction.opcode != Opcode.IGET_OBJECT) return@firstNotNullOf null
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val getInstruction = instruction as Instruction22c
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val fieldReference = getInstruction.reference as FieldReference
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if (fieldReference.type != "Ljava/lang/Float;") return@firstNotNullOf null
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instruction
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}
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// Search for the instruction where we get the android.view.Window via the Activity.
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// Gets the index of that instruction and the register of the Activity.
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val (windowIndex, activityRegister) = implementation!!.instructions.withIndex()
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.firstNotNullOf { (index, instruction) ->
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if (instruction.opcode != Opcode.INVOKE_VIRTUAL)
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return@firstNotNullOf null
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val invokeInstruction = instruction as Instruction35c
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val methodRef = invokeInstruction.reference as MethodReference
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if (methodRef.name != "getWindow" || methodRef.returnType != "Landroid/view/Window;")
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return@firstNotNullOf null
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Pair(index, invokeInstruction.registerC)
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}
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// The register in which the brightness value is loaded
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val brightnessRegister = brightnessInstruction.registerA
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// Replaces the getWindow call with our custom one to run the lockscreen code
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replaceInstruction(
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windowIndex,
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"invoke-static { v$activityRegister, v$brightnessRegister }, " +
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"$INTEGRATIONS_CLASS_DESCRIPTOR->" +
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"getWindow" +
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"(Landroidx/appcompat/app/AppCompatActivity;F)" +
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"Landroid/view/Window;"
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)
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// Normally, the brightness is loaded into a register after the getWindow call.
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// In order to pass the brightness value to our custom getWindow implementation,
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// we need to add the same instructions before the getWindow call.
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// The Float object is loaded into the brightness register and gets converted to a float.
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addInstructions(
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windowIndex,
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"""
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invoke-virtual { v$brightnessRegister }, Ljava/lang/Float;->floatValue()F
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move-result v$brightnessRegister
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"""
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)
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addInstruction(windowIndex, brightnessInstruction)
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} ?: throw BrightnessFingerprint.exception
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}
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private companion object {
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const val INTEGRATIONS_CLASS_DESCRIPTOR = "Lapp/revanced/tudortmund/lockscreen/ShowOnLockscreenPatch;"
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}
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}
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