From 4a56058afbf6973819a8690cb0a77d1f98d2f5bc Mon Sep 17 00:00:00 2001
From: LuK1337 <priv.luk@gmail.com>
Date: Fri, 10 Aug 2018 11:37:53 +0200
Subject: [PATCH] msm8976-common: lineagehw: Update ReadingEnhancement for new
 API

Change-Id: I8afaa7dfebfe765ef3d670f544344b7dea732ac2
---
 .../lineage/hardware/ReadingEnhancement.java  | 30 +++++++++++++++++--
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/lineagehw/org/lineage/hardware/ReadingEnhancement.java b/lineagehw/org/lineage/hardware/ReadingEnhancement.java
index d718637..76af6e2 100644
--- a/lineagehw/org/lineage/hardware/ReadingEnhancement.java
+++ b/lineagehw/org/lineage/hardware/ReadingEnhancement.java
@@ -27,12 +27,36 @@ public class ReadingEnhancement {
     private static final String ACCESSIBILITY_FILE =
             "/sys/devices/virtual/mdnie/mdnie/accessibility";
 
+    /**
+     * Whether device supports Reader Mode
+     *
+     * @return boolean Supported devices must return always true
+     */
     public static boolean isSupported() {
-        return FileUtils.isFileWritable(ACCESSIBILITY_FILE);
+        return FileUtils.isFileWritable(ACCESSIBILITY_FILE) &&
+                FileUtils.isFileReadable(ACCESSIBILITY_FILE);
     }
 
-    public static boolean setGrayscale(boolean state) {
-        return FileUtils.writeLine(ACCESSIBILITY_FILE, state ? "4" : "0");
+    /**
+     * This method return the current activation status of Reader Mode
+     *
+     * @return boolean Must be false when Reader Mode 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(ACCESSIBILITY_FILE).equals(
+                "Current accessibility : DSI0 : GRAYSCALE ");
+    }
+
+    /**
+     * This method allows to setup Reader Mode
+     *
+     * @param status The new Reader Mode status
+     * @return boolean Must be false if Reader Mode is not supported or the operation
+     * failed; true in any other case.
+     */
+    public static boolean setEnabled(boolean status) {
+        return FileUtils.writeLine(ACCESSIBILITY_FILE, status ? "4" : "0");
     }
 
 }