tomato: Switch to the CMHW touchscreen gestures implementation

Change-Id: Ic5ecae8e7758da3131a835e708e6941387b5fa18

cmhw/src/org/cyanogenmod/hardware/TouchscreenGestures.java

@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2016 The CyanogenMod 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.
+ */
+
+package org.cyanogenmod.hardware;
+
+import org.cyanogenmod.internal.util.FileUtils;
+
+import cyanogenmod.hardware.TouchscreenGesture;
+
+/**
+ * Touchscreen gestures API
+ *
+ * A device may implement several touchscreen gestures for use while
+ * the display is turned off, such as drawing alphabets and shapes.
+ * These gestures can be interpreted by userspace to activate certain
+ * actions and launch certain apps, such as to skip music tracks,
+ * to turn on the flashlight, or to launch the camera app.
+ *
+ * This *should always* be supported by the hardware directly.
+ * A lot of recent touch controllers have a firmware option for this.
+ *
+ * This API provides support for enumerating the gestures
+ * supported by the touchscreen.
+ */
+public class TouchscreenGestures {
+
+    private static final String GESTURE_PATH =
+            "/sys/devices/virtual/touchscreen/touchscreen_dev/gesture_ctrl";
+
+    // Id, name, keycode
+    private static final TouchscreenGesture[] TOUCHSCREEN_GESTURES = {
+        new TouchscreenGesture(0, "One finger up swipe", 254),
+        new TouchscreenGesture(1, "One finger down swipe", 249),
+        new TouchscreenGesture(2, "One finger left swipe", 250),
+        new TouchscreenGesture(3, "One finger right swipe", 251),
+        new TouchscreenGesture(4, "Letter C", 252),
+        new TouchscreenGesture(5, "Letter E", 255),
+        new TouchscreenGesture(6, "Letter M", 256),
+        new TouchscreenGesture(7, "Letter O", 253),
+        new TouchscreenGesture(8, "Letter W", 257),
+    };
+
+    /**
+     * Whether device supports touchscreen gestures
+     *
+     * @return boolean Supported devices must return always true
+     */
+    public static boolean isSupported() {
+        return FileUtils.isFileWritable(GESTURE_PATH) &&
+                FileUtils.isFileReadable(GESTURE_PATH);
+    }
+
+    /*
+     * Get the list of available gestures. A mode has an integer
+     * identifier and a string name.
+     *
+     * It is the responsibility of the upper layers to
+     * map the name to a human-readable format or perform translation.
+     */
+    public static TouchscreenGesture[] getAvailableGestures() {
+        return TOUCHSCREEN_GESTURES;
+    }
+
+    /**
+     * This method allows to set the activation status of a gesture
+     *
+     * @param gesture The gesture to be activated
+     *        state   The new activation status of the gesture
+     * @return boolean Must be false if gesture is not supported
+     *         or the operation failed; true in any other case.
+     */
+    public static boolean setGestureEnabled(
+            final TouchscreenGesture gesture, final boolean state) {
+        String[] cmd = null;
+
+        switch (gesture.id) {
+            case 0:
+                cmd = new String[] { "up=" };
+                break;
+            case 1:
+                cmd = new String[] { "down=" };
+                break;
+            case 2:
+                cmd = new String[] { "left=" };
+                break;
+            case 3:
+                cmd = new String[] { "right=" };
+                break;
+            case 4:
+                cmd = new String[] { "c=" };
+                break;
+            case 5:
+                cmd = new String[] { "e=" };
+                break;
+            case 6:
+                cmd = new String[] { "m=" };
+                break;
+            case 7:
+                cmd = new String[] { "o=" };
+                break;
+            case 8:
+                cmd = new String[] { "w=" };
+                break;
+            default:
+                return false;
+        }
+
+        String enabled = state ? "true" : "false";
+        StringBuilder builder = new StringBuilder();
+        for (String i : cmd) {
+            if (builder.length() > 0) {
+                builder.append(',');
+            }
+            builder.append(i);
+            builder.append(enabled);
+        }
+
+        return FileUtils.writeLine(GESTURE_PATH, builder.toString());
+    }
+}