From 0f8c156f243c0765dfc24f725357a1bbbce2628e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20G=C3=BCnzler?= <r@gnzler.io>
Date: Mon, 12 Jun 2023 13:55:28 +0900
Subject: [PATCH] Lift reverse-scrolling option into AModule
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The option is generally useful when scrolling is used, when configuring
input devices to use "natural scroll direction".
Both backlight and pulseaudio were using different implementations, this
unifies and documents them.

Signed-off-by: Robert Günzler <r@gnzler.io>
---
 src/AModule.cpp            | 7 +++++--
 src/modules/backlight.cpp  | 8 --------
 src/modules/pulseaudio.cpp | 7 -------
 3 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/src/AModule.cpp b/src/AModule.cpp
index 459e5620..1bfb2def 100644
--- a/src/AModule.cpp
+++ b/src/AModule.cpp
@@ -97,11 +97,14 @@ bool AModule::handleToggle(GdkEventButton* const& e) {
 }
 
 AModule::SCROLL_DIR AModule::getScrollDir(GdkEventScroll* e) {
+  // only affects up/down
+  bool reverse = config_["reverse-scrolling"].asBool();
+
   switch (e->direction) {
     case GDK_SCROLL_UP:
-      return SCROLL_DIR::UP;
+      return reverse ? SCROLL_DIR::DOWN : SCROLL_DIR::UP;
     case GDK_SCROLL_DOWN:
-      return SCROLL_DIR::DOWN;
+      return reverse ? SCROLL_DIR::UP : SCROLL_DIR::DOWN;
     case GDK_SCROLL_LEFT:
       return SCROLL_DIR::LEFT;
     case GDK_SCROLL_RIGHT:
diff --git a/src/modules/backlight.cpp b/src/modules/backlight.cpp
index eb7a7e9a..58d14dde 100644
--- a/src/modules/backlight.cpp
+++ b/src/modules/backlight.cpp
@@ -305,14 +305,6 @@ bool waybar::modules::Backlight::handleScroll(GdkEventScroll *e) {
     return true;
   }
 
-  if (config_["reverse-scrolling"].asBool()) {
-    if (dir == SCROLL_DIR::UP) {
-      dir = SCROLL_DIR::DOWN;
-    } else if (dir == SCROLL_DIR::DOWN) {
-      dir = SCROLL_DIR::UP;
-    }
-  }
-
   // Get scroll step
   double step = 1;
 
diff --git a/src/modules/pulseaudio.cpp b/src/modules/pulseaudio.cpp
index 586b6cc1..d35e2983 100644
--- a/src/modules/pulseaudio.cpp
+++ b/src/modules/pulseaudio.cpp
@@ -81,13 +81,6 @@ bool waybar::modules::Pulseaudio::handleScroll(GdkEventScroll *e) {
   if (dir == SCROLL_DIR::NONE) {
     return true;
   }
-  if (config_["reverse-scrolling"].asInt() == 1) {
-    if (dir == SCROLL_DIR::UP) {
-      dir = SCROLL_DIR::DOWN;
-    } else if (dir == SCROLL_DIR::DOWN) {
-      dir = SCROLL_DIR::UP;
-    }
-  }
   double volume_tick = static_cast<double>(PA_VOLUME_NORM) / 100;
   pa_volume_t change = volume_tick;
   pa_cvolume pa_volume = pa_volume_;