From 6bed9bd765e2e82af0c957ff037518d3b362b632 Mon Sep 17 00:00:00 2001
From: Sujith Ramakrishnan <sujithrk@google.com>
Date: Wed, 26 Apr 2017 12:33:37 -0700
Subject: [PATCH] Accessibility shortcut on Android TV.

	- Added a Long Press (HOME + DPAD_CENTER) combination
	  as the Accessibility shortcut.

Note: Accessibility Shortcut in TV Settings still needs to be put in.

Test: Manual - Pressed the key combination and watched logs.
Test: Manual - watch -n 1 'adb shell dumpsys window policy | grep mAccess'
		will show the keys pressed at any given time.

Bug: 36572948
Change-Id: I557aabad84b2c02ea195754fa2bd051934e324ee
---
 .../server/policy/PhoneWindowManager.java     | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 7e03d80d33a64..c0318ab45497f 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -777,6 +777,10 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     private boolean mBugreportTvKey2Pressed;
     private boolean mBugreportTvScheduled;
 
+    private boolean mAccessibilityTvKey1Pressed;
+    private boolean mAccessibilityTvKey2Pressed;
+    private boolean mAccessibilityTvScheduled;
+
     /* The number of steps between min and max brightness */
     private static final int BRIGHTNESS_STEPS = 10;
 
@@ -821,6 +825,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
     private static final int MSG_BACK_DELAYED_PRESS = 20;
     private static final int MSG_ACCESSIBILITY_SHORTCUT = 21;
     private static final int MSG_BUGREPORT_TV = 22;
+    private static final int MSG_ACCESSIBILITY_TV = 23;
 
     private static final int MSG_REQUEST_TRANSIENT_BARS_ARG_STATUS = 0;
     private static final int MSG_REQUEST_TRANSIENT_BARS_ARG_NAVIGATION = 1;
@@ -902,6 +907,11 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                 case MSG_BUGREPORT_TV:
                     takeBugreport();
                     break;
+                case MSG_ACCESSIBILITY_TV:
+                    if (mAccessibilityShortcutController.isAccessibilityShortcutAvailable(false)) {
+                        accessibilityShortcutActivated();
+                    }
+                    break;
             }
         }
     }
@@ -3308,6 +3318,11 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             if (!down) {
                 cancelPreloadRecentApps();
 
+                if (mHasFeatureLeanback) {
+                    // Clear flags
+                    mAccessibilityTvKey2Pressed = down;
+                }
+
                 mHomePressed = false;
                 if (mHomeConsumed) {
                     mHomeConsumed = false;
@@ -3362,6 +3377,13 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                     preloadRecentApps();
                 }
             } else if ((event.getFlags() & KeyEvent.FLAG_LONG_PRESS) != 0) {
+                if (mHasFeatureLeanback) {
+                    mAccessibilityTvKey2Pressed = down;
+                    if (interceptAccessibilityGestureTv()) {
+                        return -1;
+                    }
+                }
+
                 if (!keyguardOn) {
                     handleLongPressOnHome(event.getDeviceId());
                 }
@@ -3521,6 +3543,11 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             return 0;
         } else if (mHasFeatureLeanback && interceptBugreportGestureTv(keyCode, down)) {
             return -1;
+        } else if (mHasFeatureLeanback && keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
+            mAccessibilityTvKey1Pressed = down;
+            if (interceptAccessibilityGestureTv()) {
+                return -1;
+            }
         }
 
         // Toggle Caps Lock on META-ALT.
@@ -3739,6 +3766,25 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         return mBugreportTvScheduled;
     }
 
+    /**
+     * TV only: recognizes a remote control gesture as Accessibility shortcut.
+     * Shortcut: Long press (HOME + DPAD_CENTER)
+     */
+    private boolean interceptAccessibilityGestureTv() {
+        if (mAccessibilityTvKey1Pressed && mAccessibilityTvKey2Pressed) {
+            if (!mAccessibilityTvScheduled) {
+                mAccessibilityTvScheduled = true;
+                Message msg = Message.obtain(mHandler, MSG_ACCESSIBILITY_TV);
+                msg.setAsynchronous(true);
+                mHandler.sendMessage(msg);
+            }
+        } else if (mAccessibilityTvScheduled) {
+            mHandler.removeMessages(MSG_ACCESSIBILITY_TV);
+            mAccessibilityTvScheduled = false;
+        }
+        return mAccessibilityTvScheduled;
+    }
+
     private void takeBugreport() {
         if ("1".equals(SystemProperties.get("ro.debuggable"))
                 || Settings.Global.getInt(mContext.getContentResolver(),
@@ -8215,6 +8261,14 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         pw.print(prefix); pw.print("mDemoHdmiRotation="); pw.print(mDemoHdmiRotation);
                 pw.print(" mDemoHdmiRotationLock="); pw.println(mDemoHdmiRotationLock);
         pw.print(prefix); pw.print("mUndockedHdmiRotation="); pw.println(mUndockedHdmiRotation);
+        if (mHasFeatureLeanback) {
+            pw.print(prefix);
+            pw.print("mAccessibilityTvKey1Pressed="); pw.println(mAccessibilityTvKey1Pressed);
+            pw.print(prefix);
+            pw.print("mAccessibilityTvKey2Pressed="); pw.println(mAccessibilityTvKey2Pressed);
+            pw.print(prefix);
+            pw.print("mAccessibilityTvScheduled="); pw.println(mAccessibilityTvScheduled);
+        }
 
         mGlobalKeyManager.dump(prefix, pw);
         mStatusBarController.dump(pw, prefix);