From 2087fbe090509cfbe4d61ed1fccad886b14f0060 Mon Sep 17 00:00:00 2001
From: Willow Barraco <contact@willowbarraco.fr>
Date: Sun, 15 Oct 2023 20:22:14 +0200
Subject: [PATCH] Add a -s to scale the edge sizes

With some very HiDPI screen, it is hard to trigger edge triggers.
---
 config.def.h |  1 +
 lisgd.1      |  5 +++++
 lisgd.c      | 19 +++++++++++--------
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/config.def.h b/config.def.h
index d07f50d..f02e624 100644
--- a/config.def.h
+++ b/config.def.h
@@ -20,6 +20,7 @@ double edgesizeleft = 50.0;
 double edgesizetop = 50.0;
 double edgesizeright = 50.0;
 double edgesizebottom = 50.0;
+double edgessizecaling = 1.0;
 char *device = "/dev/input/touchscreen";
 
 //Gestures can also be specified interactively from the command line using -g
diff --git a/lisgd.1 b/lisgd.1
index 55a359a..dd197cc 100644
--- a/lisgd.1
+++ b/lisgd.1
@@ -96,6 +96,11 @@ edge-based gestures. Should be used in conjunction with -w. If unset,
 and either the DISPLAY or WAYLAND_DISPLAY env var is set, X/Wayland
 dynamic screen geometry detection will be used instead.
 
+.TP
+.BR \-s ", " \-s\ edgessizecaling\fR
+Scale the edge sizes with this value. It is very usefull with very hidpi screens,
+to help detecting edge gestures.
+
 .TP
 .BR \-v \fR
 Enables verbose mode which prints debugging messages.
diff --git a/lisgd.c b/lisgd.c
index 2d1e775..921f5bc 100644
--- a/lisgd.c
+++ b/lisgd.c
@@ -178,22 +178,22 @@ Edge
 gesturecalculateedge(double x0, double y0, double x1, double y1) {
 		Edge horizontal = EdgeNone;
 		Edge vertical = EdgeNone;
-		if (x0 <= edgesizeleft) {
+		if (x0 <= edgesizeleft * edgessizecaling) {
 			horizontal = EdgeLeft;
-		} else if (x0 >= screenwidth - edgesizeright) {
+		} else if (x0 >= screenwidth - edgesizeright * edgessizecaling) {
 			horizontal = EdgeRight;
-		} else if (x1 <= edgesizeleft) {
+		} else if (x1 <= edgesizeleft * edgessizecaling) {
 			horizontal = EdgeLeft;
-		} else if (x1 >= screenwidth - edgesizeright) {
+		} else if (x1 >= screenwidth - edgesizeright * edgessizecaling) {
 			horizontal = EdgeRight;
 		}
-		if (y0 <= edgesizetop) {
+		if (y0 <= edgesizetop * edgessizecaling) {
 			vertical = EdgeTop;
-		} else if (y0 >= screenheight - edgesizebottom) {
+		} else if (y0 >= screenheight - edgesizebottom * edgessizecaling) {
 			vertical = EdgeBottom;
-		} else if (y1 <= edgesizetop) {
+		} else if (y1 <= edgesizetop * edgessizecaling) {
 			vertical = EdgeTop;
-		} else if (y1 >= screenheight - edgesizebottom) {
+		} else if (y1 >= screenheight - edgesizebottom * edgessizecaling) {
 			vertical = EdgeBottom;
 		}
 		if (horizontal == EdgeLeft && vertical == EdgeTop) {
@@ -553,6 +553,9 @@ main(int argc, char *argv[])
 		} else if (!strcmp(argv[i], "-w")) {
 			if (i == argc - 1) die("option -w expects a value");
 			screenwidth = atoi(argv[++i]);
+		} else if (!strcmp(argv[i], "-s")) {
+			if (i == argc - 1) die("option -s expects a value");
+			edgessizecaling = atof(argv[++i]);
 		} else if (!strcmp(argv[i], "-g")) {
 			if (i == argc - 1) die("option -g expects a value");
 			gestsarrlen++;
-- 
2.45.2