cmhw: Add touchscreen hovering support
Change-Id: Ia581d6cc6f30b3de91c08ed5be3c4ba76b9a5d31
diff --git a/cmhw/org/cyanogenmod/hardware/TouchscreenHovering.java b/cmhw/org/cyanogenmod/hardware/TouchscreenHovering.java
new file mode 100644
index 0000000..f6a7ee8
--- /dev/null
+++ b/cmhw/org/cyanogenmod/hardware/TouchscreenHovering.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2015 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.hardware.util.FileUtils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+import android.util.Log;
+
+/**
+ * Touchscreen Hovering
+ */
+public class TouchscreenHovering {
+
+ private static String TAG = "TouchscreenHovering";
+
+ private static String COMMAND_PATH = "/sys/class/sec/tsp/cmd";
+ private static String COMMAND_LIST_PATH = "/sys/class/sec/tsp/cmd_list";
+ private static String COMMAND_RESULT_PATH = "/sys/class/sec/tsp/cmd_result";
+ private static String HOVER_MODE = "hover_enable";
+ private static String HOVER_MODE_ENABLE = "hover_enable,1";
+ private static String HOVER_MODE_DISABLE = "hover_enable,0";
+ private static String STATUS_OK = ":OK";
+
+ /**
+ * Whether device supports touchscreen hovering.
+ *
+ * @return boolean Supported devices must return always true
+ */
+ public static boolean isSupported() {
+ File f = new File(COMMAND_PATH);
+ if (f.exists()) {
+ BufferedReader reader = null;
+ try {
+ String currentLine;
+ reader = new BufferedReader(new FileReader(COMMAND_LIST_PATH));
+ while ((currentLine = reader.readLine()) != null) {
+ if (HOVER_MODE.equals(currentLine))
+ return true;
+ }
+ } catch (IOException e) {
+ // Ignore exception, will be false anyway
+ } finally {
+ if (reader != null) {
+ try {
+ reader.close();
+ } catch (IOException e) {
+ // Ignore exception, no recovery possible
+ }
+ }
+ }
+ }
+ return false;
+ }
+
+ /** This method returns the current activation status of touchscreen hovering
+ *
+ * @return boolean Must be false if touchscreen hovering is not supported or not activated,
+ * or the operation failed while reading the status; true in any other case.
+ */
+ public static boolean isEnabled() {
+ return FileUtils.readOneLine(COMMAND_RESULT_PATH).equals(HOVER_MODE_ENABLE + STATUS_OK);
+ }
+
+ /**
+ * This method allows to setup touchscreen hovering status.
+ *
+ * @param status The new touchscreen hovering status
+ * @return boolean Must be false if touchscreen hovering is not supported or the operation
+ * failed; true in any other case.
+ */
+ public static boolean setEnabled(boolean status) {
+ return FileUtils.writeLine(COMMAND_PATH, status ? HOVER_MODE_ENABLE : HOVER_MODE_DISABLE);
+ }
+}