1 files changed, 98 insertions, 0 deletions
diff --git a/lineagehw/org/lineageos/hardware/TouchscreenHovering.java b/lineagehw/org/lineageos/hardware/TouchscreenHovering.java
new file mode 100644
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+++ b/lineagehw/org/lineageos/hardware/TouchscreenHovering.java
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+/*
+ * Copyright (C) 2015-2016 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.lineageos.hardware;
+
+import android.util.Log;
+
+import org.lineageos.internal.util.FileUtils;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+/**
+ * Touchscreen Hovering
+ */
+public class TouchscreenHovering {
+
+    private static final String TAG = "TouchscreenHovering";
+
+    private static final String COMMAND_PATH = "/sys/class/sec/tsp/cmd";
+    private static final String COMMAND_LIST_PATH = "/sys/class/sec/tsp/cmd_list";
+    private static final String COMMAND_RESULT_PATH = "/sys/class/sec/tsp/cmd_result";
+    private static final String HOVER_MODE = "hover_enable";
+    private static final String HOVER_MODE_ENABLE = "hover_enable,1";
+    private static final String HOVER_MODE_DISABLE = "hover_enable,0";
+    private static final String STATUS_OK = ":OK";
+
+    /**
+     * Whether device supports touchscreen hovering.
+     *
+     * @return boolean Supported devices must return always true
+     */
+    public static boolean isSupported() {
+        if (!FileUtils.isFileWritable(COMMAND_PATH) ||
+                !FileUtils.isFileReadable(COMMAND_LIST_PATH) ||
+                !FileUtils.isFileReadable(COMMAND_RESULT_PATH)) {
+            return false;
+        }
+
+        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) {
+            Log.e(TAG, "Could not read from file " + COMMAND_LIST_PATH, e);
+        } 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 (HOVER_MODE_ENABLE + STATUS_OK).equals(
+                FileUtils.readOneLine(COMMAND_RESULT_PATH));
+    }
+
+    /**
+     * 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);
+    }
+}