From 5742a40b87dfdc26df3bd9fe94197ae414ece546 Mon Sep 17 00:00:00 2001
From: Ethan Yonker <dees_troy@teamw.in>
Date: Tue, 12 Aug 2014 14:52:49 -0500
Subject: Allow blacklisting input devices by build flag

Usage:
TW_INPUT_BLACKLIST := accelerometer
TW_INPUT_BLACKLIST := "accelerometer\x0agyroscope"

This can be used to fix touch input on devices where an input
device is breaking touch processing in TWRP.

We are using new line chars to separate multiple devices and in
the make file you specify the new line character with \x0a which
is the hex code in ASCII for a new line.

The new line character might be a bit of a pain to use as a
delimeter, but it is highly unlikely that an OEM will ever name
an input device with a new line character in the name.

Change-Id: I255136b7a686909a23e649918c661843153c2853
---
 minuitwrp/Android.mk |  4 ++++
 minuitwrp/events.c   | 17 ++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/minuitwrp/Android.mk b/minuitwrp/Android.mk
index 59ee8ba56..fad451f7e 100644
--- a/minuitwrp/Android.mk
+++ b/minuitwrp/Android.mk
@@ -81,6 +81,10 @@ ifeq ($(TW_IGNORE_MAJOR_AXIS_0), true)
 LOCAL_CFLAGS += -DTW_IGNORE_MAJOR_AXIS_0
 endif
 
+ifneq ($(TW_INPUT_BLACKLIST),)
+  LOCAL_CFLAGS += -DTW_INPUT_BLACKLIST=$(TW_INPUT_BLACKLIST)
+endif
+
 ifneq ($(BOARD_USE_CUSTOM_RECOVERY_FONT),)
   LOCAL_CFLAGS += -DBOARD_USE_CUSTOM_RECOVERY_FONT=$(BOARD_USE_CUSTOM_RECOVERY_FONT)
 else
diff --git a/minuitwrp/events.c b/minuitwrp/events.c
index 7b4655d8e..5a101028b 100644
--- a/minuitwrp/events.c
+++ b/minuitwrp/events.c
@@ -173,11 +173,26 @@ static int vk_init(struct ev *e)
         e->ignored = 1;
     }
 #else
+#ifndef TW_INPUT_BLACKLIST
     // Blacklist these "input" devices
-    if (strcmp(e->deviceName, "bma250") == 0 || strcmp(e->deviceName, "bma150") == 0 || strcmp(e->deviceName, "accelerometer") == 0)
+    if (strcmp(e->deviceName, "bma250") == 0 || strcmp(e->deviceName, "bma150") == 0) == 0)
     {
+        printf("blacklisting %s input device\n", e->deviceName);
         e->ignored = 1;
     }
+#else
+    char* bl = strdup(EXPAND(TW_INPUT_BLACKLIST));
+    char* blacklist = strtok(bl, "\n");
+
+    while (blacklist != NULL) {
+        if (strcmp(e->deviceName, blacklist) == 0) {
+            printf("blacklisting %s input device\n", blacklist);
+            e->ignored = 1;
+        }
+        blacklist = strtok(NULL, "\n");
+    }
+    free(bl);
+#endif
 #endif
 
     strcat(vk_path, e->deviceName);
-- 
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