1 files changed, 103 insertions, 0 deletions
diff --git a/touch/TouchscreenGesture.cpp b/touch/TouchscreenGesture.cpp
new file mode 100644
index 0000000..3313e8e
--- /dev/null
+++ b/touch/TouchscreenGesture.cpp
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2020 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "TouchscreenGestureService"
+
+#include "TouchscreenGesture.h"
+
+#include <bitset>
+#include <fstream>
+#include <map>
+#include <type_traits>
+#include <vector>
+
+namespace {
+template <typename T>
+std::enable_if_t<std::is_integral<T>::value, std::string> encode_binary(T i) {
+    return std::bitset<sizeof(T) * 8>(i).to_string();
+}
+}  // anonymous namespace
+
+namespace vendor {
+namespace lineage {
+namespace touch {
+namespace V1_0 {
+namespace implementation {
+
+const std::string kGesturePath = "/proc/driver/gesture_type";
+
+const std::map<int32_t, TouchscreenGesture::GestureInfo> TouchscreenGesture::kGestureInfoMap = {
+    // clang-format off
+    {0, {17, "Letter W"}},
+    {1, {31, "Letter S"}},
+    {2, {18, "Letter e"}},
+    {3, {50, "Letter M"}},
+    {4, {44, "Letter Z"}},
+    {5, {47, "Letter V"}},
+    {6, {168, "Left arrow"}},
+    {7, {159, "Right arrow"}},
+    {8, {119, "Two fingers down swipe"}},
+    // clang-format on
+};
+
+const uint8_t kKeyMaskGestureControl = 1 << 0;
+const std::vector<uint8_t> kGestureMasks = {
+    1 << 1,  // W gesture mask
+    1 << 2,  // S gesture mask
+    1 << 3,  // e gesture mask
+    1 << 4,  // M gesture mask
+    1 << 5,  // Z gesture mask
+    1 << 6,  // V gesture mask
+    1 << 7,  // Music control mask
+    1 << 7,  // Music control mask
+    1 << 7,  // Music control mask
+};
+
+Return<void> TouchscreenGesture::getSupportedGestures(getSupportedGestures_cb resultCb) {
+    std::vector<Gesture> gestures;
+
+    for (const auto& entry : kGestureInfoMap) {
+        gestures.push_back({entry.first, entry.second.name, entry.second.keycode});
+    }
+    resultCb(gestures);
+
+    return Void();
+}
+
+Return<bool> TouchscreenGesture::setGestureEnabled(
+    const ::vendor::lineage::touch::V1_0::Gesture& gesture, bool enabled) {
+    uint8_t gestureMode;
+    uint8_t mask = kGestureMasks[gesture.id];
+    std::fstream file(kGesturePath);
+    file >> gestureMode;
+
+    if (enabled)
+        gestureMode |= mask;
+    else
+        gestureMode &= ~mask;
+
+    if (gestureMode != 0) gestureMode |= kKeyMaskGestureControl;
+
+    file << encode_binary(gestureMode);
+
+    return !file.fail();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace touch
+}  // namespace lineage
+}  // namespace vendor