feature: split usage into usage percentage and value (#950)

Denotes both usage and usage percentage. This also redoes the calculation for percentage to be based on the sum of avail + used, rather than on total, as otherwise we get potentially confusing percentages.

7 files changed, 98 insertions, 19 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ab87f41..b7858102 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.7.1] - ???
+
+## Bug Fixes
+
+## Changes
+
+## Features
+
+- [#950](https://github.com/ClementTsang/bottom/pull/950): Split usage into usage percentage and value.
+
 ## [0.7.0] - 2022-12-31
 
 ## Bug Fixes
diff --git a/Cargo.lock b/Cargo.lock
index 74aac16c..60cced73 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -204,7 +204,7 @@ dependencies = [
 
 [[package]]
 name = "bottom"
-version = "0.7.0"
+version = "0.7.1"
 dependencies = [
  "anyhow",
  "assert_cmd",
diff --git a/Cargo.toml b/Cargo.toml
index 19100110..b2384432 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bottom"
-version = "0.7.0"
+version = "0.7.1"
 authors = ["Clement Tsang <cjhtsang@uwaterloo.ca>"]
 edition = "2018"
 repository = "https://github.com/ClementTsang/bottom"
diff --git a/README.md b/README.md
index 9851aa35..d3f558cb 100644
--- a/README.md
+++ b/README.md
@@ -138,7 +138,7 @@ cargo install bottom
 
 ### Arch Linux
 
-There is an official package that can be installed with `pacman`:
+There is an [official package](https://archlinux.org/packages/community/x86_64/bottom/) that can be installed with `pacman`:
 
 ```bash
 sudo pacman -Syu bottom
diff --git a/src/app.rs b/src/app.rs
index 78a64b00..2cfa4ebe 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -379,9 +379,9 @@ impl App {
                     .get_mut(&self.current_widget.widget_id)
                 {
                     proc_widget_state.toggle_mem_percentage();
-                    proc_widget_state.force_data_update();
                 }
             }
+
             _ => {}
         }
     }
@@ -1219,6 +1219,12 @@ impl App {
                     {
                         proc_widget_state.select_column(ProcWidget::PID_OR_COUNT);
                     }
+                } else if let Some(disk) = self
+                    .disk_state
+                    .get_mut_widget_state(self.current_widget.widget_id)
+                {
+                    disk.table.set_sort_index(5);
+                    disk.force_data_update();
                 }
             }
             'P' => {
@@ -1302,7 +1308,7 @@ impl App {
                     .disk_state
                     .get_mut_widget_state(self.current_widget.widget_id)
                 {
-                    disk.table.set_sort_index(5);
+                    disk.table.set_sort_index(6);
                     disk.force_data_update();
                 }
             }
@@ -1311,7 +1317,7 @@ impl App {
                     .disk_state
                     .get_mut_widget_state(self.current_widget.widget_id)
                 {
-                    disk.table.set_sort_index(6);
+                    disk.table.set_sort_index(7);
                     disk.force_data_update();
                 }
             }
diff --git a/src/data_conversion.rs b/src/data_conversion.rs
index 3e9f650f..257157ee 100644
--- a/src/data_conversion.rs
+++ b/src/data_conversion.rs
@@ -90,12 +90,18 @@ impl ConvertedData {
             .iter()
             .zip(&data.io_labels)
             .for_each(|(disk, (io_read, io_write))| {
+                let summed_total_bytes = match (disk.used_space, disk.free_space) {
+                    (Some(used), Some(free)) => Some(used + free),
+                    _ => None,
+                };
+
                 self.disk_data.push(DiskWidgetData {
                     name: KString::from_ref(&disk.name),
                     mount_point: KString::from_ref(&disk.mount_point),
                     free_bytes: disk.free_space,
                     used_bytes: disk.used_space,
                     total_bytes: disk.total_space,
+                    summed_total_bytes,
                     io_read: io_read.into(),
                     io_write: io_write.into(),
                 });
diff --git a/src/widgets/disk_table.rs b/src/widgets/disk_table.rs
index b2a6db74..b168ac91 100644
--- a/src/widgets/disk_table.rs
+++ b/src/widgets/disk_table.rs
@@ -20,20 +20,12 @@ pub struct DiskWidgetData {
     pub free_bytes: Option<u64>,
     pub used_bytes: Option<u64>,
     pub total_bytes: Option<u64>,
+    pub summed_total_bytes: Option<u64>,
     pub io_read: KString,
     pub io_write: KString,
 }
 
 impl DiskWidgetData {
-    pub fn free_space(&self) -> KString {
-        if let Some(free_bytes) = self.free_bytes {
-            let converted_free_space = get_decimal_bytes(free_bytes);
-            format!("{:.*}{}", 0, converted_free_space.0, converted_free_space.1).into()
-        } else {
-            "N/A".into()
-        }
-    }
-
     pub fn total_space(&self) -> KString {
         if let Some(total_bytes) = self.total_bytes {
             let converted_total_space = get_decimal_bytes(total_bytes);
@@ -47,13 +39,57 @@ impl DiskWidgetData {
         }
     }
 
-    pub fn usage(&self) -> KString {
-        if let (Some(used_bytes), Some(total_bytes)) = (self.used_bytes, self.total_bytes) {
-            format!("{:.0}%", used_bytes as f64 / total_bytes as f64 * 100_f64).into()
+    pub fn free_space(&self) -> KString {
+        if let Some(free_bytes) = self.free_bytes {
+            let converted_free_space = get_decimal_bytes(free_bytes);
+            format!("{:.*}{}", 0, converted_free_space.0, converted_free_space.1).into()
+        } else {
+            "N/A".into()
+        }
+    }
+
+    pub fn used_space(&self) -> KString {
+        if let Some(used_bytes) = self.used_bytes {
+            let converted_free_space = get_decimal_bytes(used_bytes);
+            format!("{:.*}{}", 0, converted_free_space.0, converted_free_space.1).into()
         } else {
             "N/A".into()
         }
     }
+
+    pub fn free_percent(&self) -> Option<f64> {
+        if let (Some(free_bytes), Some(summed_total_bytes)) =
+            (self.free_bytes, self.summed_total_bytes)
+        {
+            Some(free_bytes as f64 / summed_total_bytes as f64 * 100_f64)
+        } else {
+            None
+        }
+    }
+
+    pub fn free_percent_string(&self) -> KString {
+        match self.free_percent() {
+            Some(val) => format!("{:.1}%", val).into(),
+            None => "N/A".into(),
+        }
+    }
+
+    pub fn used_percent(&self) -> Option<f64> {
+        if let (Some(used_bytes), Some(summed_total_bytes)) =
+            (self.used_bytes, self.summed_total_bytes)
+        {
+            Some(used_bytes as f64 / summed_total_bytes as f64 * 100_f64)
+        } else {
+            None
+        }
+    }
+
+    pub fn used_percent_string(&self) -> KString {
+        match self.used_percent() {
+            Some(val) => format!("{:.1}%", val).into(),
+            None => "N/A".into(),
+        }
+    }
 }
 
 pub enum DiskWidgetColumn {
@@ -62,6 +98,8 @@ pub enum DiskWidgetColumn {
     Used,
     Free,
     Total,
+    UsedPercent,
+    FreePercent,
     IoRead,
     IoWrite,
 }
@@ -73,6 +111,8 @@ impl ColumnHeader for DiskWidgetColumn {
             DiskWidgetColumn::Mount => "Mount(m)",
             DiskWidgetColumn::Used => "Used(u)",
             DiskWidgetColumn::Free => "Free(n)",
+            DiskWidgetColumn::UsedPercent => "Used%(p)",
+            DiskWidgetColumn::FreePercent => "Free%",
             DiskWidgetColumn::Total => "Total(t)",
             DiskWidgetColumn::IoRead => "R/s(r)",
             DiskWidgetColumn::IoWrite => "W/s(w)",
@@ -86,8 +126,14 @@ impl DataToCell<DiskWidgetColumn> for DiskWidgetData {
         let text = match column {
             DiskWidgetColumn::Disk => truncate_to_text(&self.name, calculated_width),
             DiskWidgetColumn::Mount => truncate_to_text(&self.mount_point, calculated_width),
-            DiskWidgetColumn::Used => truncate_to_text(&self.usage(), calculated_width),
+            DiskWidgetColumn::Used => truncate_to_text(&self.used_space(), calculated_width),
             DiskWidgetColumn::Free => truncate_to_text(&self.free_space(), calculated_width),
+            DiskWidgetColumn::UsedPercent => {
+                truncate_to_text(&self.used_percent_string(), calculated_width)
+            }
+            DiskWidgetColumn::FreePercent => {
+                truncate_to_text(&self.free_percent_string(), calculated_width)
+            }
             DiskWidgetColumn::Total => truncate_to_text(&self.total_space(), calculated_width),
             DiskWidgetColumn::IoRead => truncate_to_text(&self.io_read, calculated_width),
             DiskWidgetColumn::IoWrite => truncate_to_text(&self.io_write, calculated_width),
@@ -132,9 +178,19 @@ impl SortsRow for DiskWidgetColumn {
             DiskWidgetColumn::Used => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.used_bytes, &b.used_bytes));
             }
+            DiskWidgetColumn::UsedPercent => {
+                data.sort_by(|a, b| {
+                    sort_partial_fn(descending)(&a.used_percent(), &b.used_percent())
+                });
+            }
             DiskWidgetColumn::Free => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.free_bytes, &b.free_bytes));
             }
+            DiskWidgetColumn::FreePercent => {
+                data.sort_by(|a, b| {
+                    sort_partial_fn(descending)(&a.free_percent(), &b.free_percent())
+                });
+            }
             DiskWidgetColumn::Total => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.total_bytes, &b.total_bytes));
             }
@@ -156,6 +212,7 @@ impl DiskTableWidget {
             SortColumn::hard(DiskWidgetColumn::Used, 8).default_descending(),
             SortColumn::hard(DiskWidgetColumn::Free, 8).default_descending(),
             SortColumn::hard(DiskWidgetColumn::Total, 9).default_descending(),
+            SortColumn::hard(DiskWidgetColumn::UsedPercent, 9).default_descending(),
             SortColumn::hard(DiskWidgetColumn::IoRead, 10).default_descending(),
             SortColumn::hard(DiskWidgetColumn::IoWrite, 11).default_descending(),
         ];