From 708bd9c891cd58a840236b3d77340fa25f197281 Mon Sep 17 00:00:00 2001
From: Quantenzitrone <74491719+Quantenzitrone@users.noreply.github.com>
Date: Sun, 21 Aug 2022 19:10:48 +0200
Subject: [PATCH] feat(temperature): %temperature-k% token for Kelvin (#2784)

* added kelvin option for module/temperature

* changelog for the changes i made

* fixed typos

* fixed the temperature conversion to be more precise

* Update CHANGELOG.md

Co-authored-by: Patrick Ziegler <p.ziegler96@gmail.com>

* changed the calculation of the different temperatures

it now uses float as a initial value and makes m_temp temp_k and temp_f by converting and rounding with std::round

* std::lround makes more sense to use than std::round

Co-authored-by: Patrick Ziegler <p.ziegler96@gmail.com>
---
 CHANGELOG.md                | 1 +
 src/modules/temperature.cpp | 9 +++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index cfd265b0..62557462 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `custom/text`: The `content` setting and all its properties are deprecated in favor of `format` with the same functionality. ([`#2676`](https://github.com/polybar/polybar/pull/2676))
 
 ### Added
+- `internal/temperature`: `%temperature-k%` token displays the temperature in kelvin ([`#2774`](https://github.com/polybar/polybar/discussions/2774), [`#2784`](https://github.com/polybar/polybar/pull/2784))
 - `internal/pulseaudio`: `reverse-scroll` option ([`#2664`](https://github.com/polybar/polybar/pull/2664))
 - `custom/script`: Repeat interval for script failure (`interval-fail`) and `exec-if` (`interval-if`) ([`#943`](https://github.com/polybar/polybar/issues/943), [`#2606`](https://github.com/polybar/polybar/issues/2606), [`#2630`](https://github.com/polybar/polybar/pull/2630))
 - `custom/text`: Loads the `format` setting, which supports the `<label>` tag, if the deprecated `content` is not defined ([`#1331`](https://github.com/polybar/polybar/issues/1331), [`#2673`](https://github.com/polybar/polybar/pull/2673), [`#2676`](https://github.com/polybar/polybar/pull/2676))
diff --git a/src/modules/temperature.cpp b/src/modules/temperature.cpp
index 06cf88ff..061e86a7 100644
--- a/src/modules/temperature.cpp
+++ b/src/modules/temperature.cpp
@@ -51,22 +51,27 @@ namespace modules {
   }
 
   bool temperature_module::update() {
-    m_temp = std::strtol(file_util::contents(m_path).c_str(), nullptr, 10) / 1000.0f + 0.5f;
-    int temp_f = floor(((1.8 * m_temp) + 32) + 0.5);
+    float temp = float(std::strtol(file_util::contents(m_path).c_str(), nullptr, 10)) / 1000.0;
+    m_temp     = std::lround( temp );
+    int temp_f = std::lround( (temp * 1.8) + 32.0 );
+    int temp_k = std::lround( temp + 273.15 );
 
     string temp_c_string = to_string(m_temp);
     string temp_f_string = to_string(temp_f);
+    string temp_k_string = to_string(temp_k);
 
     // Add units if `units = true` in config
     if(m_units) {
       temp_c_string += "°C";
       temp_f_string += "°F";
+      temp_k_string += "K";
     }
 
     const auto replace_tokens = [&](label_t& label) {
       label->reset_tokens();
       label->replace_token("%temperature-f%", temp_f_string);
       label->replace_token("%temperature-c%", temp_c_string);
+      label->replace_token("%temperature-k%", temp_k_string);
 
       // DEPRECATED: Will be removed in later release
       label->replace_token("%temperature%", temp_c_string);