From 23ecc3256276642ec2641e9e2c731f763b62d0dd Mon Sep 17 00:00:00 2001
From: Jens Peters <jp7677@gmail.com>
Date: Fri, 29 Dec 2023 22:36:06 +0100
Subject: [PATCH] config: add tablet rotate configuration

Co-authored-by: Consolatis <35009135+Consolatis@users.noreply.github.com>
---
 docs/rc.xml.all         | 10 ++++++----
 include/config/rcxml.h  |  1 +
 include/config/tablet.h |  8 ++++++++
 src/config/rcxml.c      |  2 ++
 src/config/tablet.c     | 18 ++++++++++++++++++
 5 files changed, 35 insertions(+), 4 deletions(-)

diff --git a/docs/rc.xml.all b/docs/rc.xml.all
index bbf61189..ddd9236a 100644
--- a/docs/rc.xml.all
+++ b/docs/rc.xml.all
@@ -394,12 +394,14 @@
   </mouse>
 
   <!--
-    Tablet buttons emulate regular mouse buttons.
+    The tablet orientation can be changed in 90 degree steps, thus
+    rotation can be set to [0|90|180|270].
 
-    The tablet *button* can be set to any of [tip|stylus|stylus2|stylus3].
-    Valid *to* mouse buttons are [left|right|middle].
+    Tablet buttons emulate regular mouse buttons. The tablet *button* can
+    be set to any of [tip|stylus|stylus2|stylus3]. Valid *to* mouse buttons
+    are [left|right|middle].
   -->
-  <tablet>
+  <tablet rotate="0">
     <map button="tip" to="left" />
     <map button="stylus" to="right" />
     <map button="stylus2" to="middle" />
diff --git a/include/config/rcxml.h b/include/config/rcxml.h
index ead62c78..acb34260 100644
--- a/include/config/rcxml.h
+++ b/include/config/rcxml.h
@@ -83,6 +83,7 @@ struct rcxml {
 
 	/* graphics tablet */
 	struct tablet_config {
+		enum rotation rotation;
 		uint16_t button_map_count;
 		struct button_map_entry button_map[BUTTON_MAP_MAX];
 	} tablet;
diff --git a/include/config/tablet.h b/include/config/tablet.h
index 25a232c3..c5b90b93 100644
--- a/include/config/tablet.h
+++ b/include/config/tablet.h
@@ -4,12 +4,20 @@
 
 #include <stdint.h>
 
+enum rotation {
+	LAB_ROTATE_NONE = 0,
+	LAB_ROTATE_90,
+	LAB_ROTATE_180,
+	LAB_ROTATE_270,
+};
+
 #define BUTTON_MAP_MAX 16
 struct button_map_entry {
 	uint32_t from;
 	uint32_t to;
 };
 
+enum rotation tablet_parse_rotation(int value);
 uint32_t tablet_button_from_str(const char *button);
 uint32_t mouse_button_from_str(const char *button);
 void tablet_button_mapping_add(uint32_t from, uint32_t to);
diff --git a/src/config/rcxml.c b/src/config/rcxml.c
index 321a5197..4f3f5a54 100644
--- a/src/config/rcxml.c
+++ b/src/config/rcxml.c
@@ -826,6 +826,8 @@ entry(xmlNode *node, char *nodename, char *content)
 		} else {
 			wlr_log(WLR_ERROR, "Invalid value for <resize popupShow />");
 		}
+	} else if (!strcasecmp(nodename, "rotate.tablet")) {
+		rc.tablet.rotation = tablet_parse_rotation(atoi(content));
 	} else if (!strcasecmp(nodename, "button.map.tablet")) {
 		button_map_from = tablet_button_from_str(content);
 	} else if (!strcasecmp(nodename, "to.map.tablet")) {
diff --git a/src/config/tablet.c b/src/config/tablet.c
index 5d138af3..81460db1 100644
--- a/src/config/tablet.c
+++ b/src/config/tablet.c
@@ -7,6 +7,24 @@
 #include "config/tablet.h"
 #include "config/rcxml.h"
 
+enum rotation tablet_parse_rotation(int value)
+{
+	switch (value) {
+	case 0:
+		return LAB_ROTATE_NONE;
+	case 90:
+		return LAB_ROTATE_90;
+	case 180:
+		return LAB_ROTATE_180;
+	case 270:
+		return LAB_ROTATE_270;
+	default:
+		wlr_log(WLR_ERROR, "Invalid value for tablet rotation: %d", value);
+		break;
+	}
+	return LAB_ROTATE_NONE;
+}
+
 uint32_t tablet_button_from_str(const char *button)
 {
 	if (!strcasecmp(button, "Tip")) {