feature: add the ability to configure the disk widget's table columns (#1625)

* a bit of refactoring here...

* some refactoring, add columns

* cleanup

* add disk column feature

* update changelog

CHANGELOG.md

@@ -22,6 +22,10 @@ That said, these are more guidelines rather than hardset rules, though the proje
 
 ## [0.11.0] - Unreleased
 
+### Features
+
+- [#1625](https://github.com/ClementTsang/bottom/pull/1625): Add the ability to configure the disk widget's table columns.
+
 ### Bug Fixes
 
 - [#1551](https://github.com/ClementTsang/bottom/pull/1551): Fix missing parent section names in default config.

sample_configs/default_config.toml

@@ -8,24 +8,34 @@
 [flags]
 # Whether to hide the average cpu entry.
 #hide_avg_cpu = false
+
 # Whether to use dot markers rather than braille.
 #dot_marker = false
+
 # The update rate of the application.
 #rate = "1s"
+
 # Whether to put the CPU legend to the left.
 #cpu_left_legend = false
+
 # Whether to set CPU% on a process to be based on the total CPU or just current usage.
 #current_usage = false
+
 # Whether to set CPU% on a process to be based on the total CPU or per-core CPU% (not divided by the number of cpus).
 #unnormalized_cpu = false
+
 # Whether to group processes with the same name together by default.
 #group_processes = false
+
 # Whether to make process searching case sensitive by default.
 #case_sensitive = false
+
 # Whether to make process searching look for matching the entire word by default.
 #whole_word = false
+
 # Whether to make process searching use regex by default.
 #regex = false
+
 # The temperature unit. One of the following, defaults to "c" for Celsius:
 #temperature_type = "c"
 ##temperature_type = "k"
@@ -33,79 +43,112 @@
 ##temperature_type = "kelvin"
 ##temperature_type = "fahrenheit"
 ##temperature_type = "celsius"
+
 # The default time interval (in milliseconds).
 #default_time_value = "60s"
+
 # The time delta on each zoom in/out action (in milliseconds).
 #time_delta = 15000
+
 # Hides the time scale.
 #hide_time = false
+
 # Override layout default widget
 #default_widget_type = "proc"
 #default_widget_count = 1
+
 # Expand selected widget upon starting the app
 #expanded = true
+
 # Use basic mode
 #basic = false
+
 # Use the old network legend style
 #use_old_network_legend = false
+
 # Remove space in tables
 #hide_table_gap = false
+
 # Show the battery widgets
 #battery = false
+
 # Disable mouse clicks
 #disable_click = false
+
 # Show memory values in the processes widget as values by default
 #process_memory_as_value = false
+
 # Show tree mode by default in the processes widget.
 #tree = false
+
 # Shows an indicator in table widgets tracking where in the list you are.
 #show_table_scroll_position = false
+
 # Show processes as their commands by default in the process widget.
 #process_command = false
+
 # Displays the network widget with binary prefixes.
 #network_use_binary_prefix = false
+
 # Displays the network widget using bytes.
 #network_use_bytes = false
+
 # Displays the network widget with a log scale.
 #network_use_log = false
+
 # Hides advanced options to stop a process on Unix-like systems.
 #disable_advanced_kill = false
+
 # Hide GPU(s) information
 #disable_gpu = false
+
 # Shows cache and buffer memory
 #enable_cache_memory = false
+
 # How much data is stored at once in terms of time.
 #retention = "10m"
+
 # Where to place the legend for the memory widget. One of "none", "top-left", "top", "top-right", "left", "right", "bottom-left", "bottom", "bottom-right".
 #memory_legend = "top-right"
+
 # Where to place the legend for the network widget. One of "none", "top-left", "top", "top-right", "left", "right", "bottom-left", "bottom", "bottom-right".
 #network_legend = "top-right"
 
+
 # Processes widget configuration
 #[processes]
 # The columns shown by the process widget. The following columns are supported (the GPU columns are only available if the GPU feature is enabled when built):
 # PID, Name, CPU%, Mem%, R/s, W/s, T.Read, T.Write, User, State, Time, GMem%, GPU%
 #columns = ["PID", "Name", "CPU%", "Mem%", "R/s", "W/s", "T.Read", "T.Write", "User", "State", "GMem%", "GPU%"]
 
+
 # CPU widget configuration
 #[cpu]
 # One of "all" (default), "average"/"avg"
 #default = "average"
 
+
 # Disk widget configuration
 #[disk]
+# The columns shown by the process widget. The following columns are supported:
+# Disk, Mount, Used, Free, Total, Used%, Free%, R/s, W/s
+#columns = ["Disk", "Mount", "Used", "Free", "Total", "Used%", "R/s", "W/s"]
 
 # By default, there are no disk name filters enabled. These can be turned on to filter out specific data entries if you
 # don't want to see them. An example use case is provided below.
 #[disk.name_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["/dev/sda\\d+", "/dev/nvme0n1p2"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
@@ -113,51 +156,63 @@
 #[disk.mount_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["/mnt/.*", "/boot"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # Temperature widget configuration
 #[temperature]
-
 # By default, there are no temperature sensor filters enabled. An example use case is provided below.
 #[temperature.sensor_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["cpu", "wifi"]
+
 # Whether to use regex. Defaults to false.
 #regex = false
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # Network widget configuration
 #[network]
-
 # By default, there are no network interface filters enabled. An example use case is provided below.
 #[network.interface_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["virbr0.*"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # These are all the components that support custom theming.  Note that colour support
 # will depend on terminal support.
 #[styles] # Uncomment if you want to use custom styling
-
 # Built-in themes. Valid values are:
 # - "default"
 # - "default-light"

schema/nightly/bottom.json

@@ -183,10 +183,35 @@
         }
       }
     },
+    "DiskColumn": {
+      "type": "string",
+      "enum": [
+        "Disk",
+        "Free",
+        "Free%",
+        "Mount",
+        "R/s",
+        "Read",
+        "Rps",
+        "Total",
+        "Used",
+        "Used%",
+        "W/s",
+        "Wps",
+        "Write"
+      ]
+    },
     "DiskConfig": {
       "description": "Disk configuration.",
       "type": "object",
       "properties": {
+        "columns": {
+          "description": "A list of disk widget columns.",
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/DiskColumn"
+          }
+        },
         "mount_filter": {
           "description": "A filter over the mount names.",
           "anyOf": [

scripts/schema/validator.py

@@ -51,7 +51,7 @@ def main():
             read_file = re.sub(
                 r"^#(\s\s+)([a-zA-Z\[])", r"\2", read_file, flags=re.MULTILINE
             )
-            print(f"uncommented file: \n{read_file}")
+            print(f"uncommented file: \n{read_file}\n=====\n")
 
             toml_str = tomllib.loads(read_file)
         else:

src/app/data_farmer.rs

@@ -25,7 +25,7 @@ use crate::{
         processes::{Pid, ProcessHarvest},
         temperature, Data,
     },
-    utils::data_prefixes::*,
+    dec_bytes_per_second_string,
 };
 
 pub type TimeOffset = f64;
@@ -423,20 +423,11 @@ impl DataCollection {
                         *io_curr = (r_rate, w_rate);
                         *io_prev = (io_r_pt, io_w_pt);
 
+                        // TODO: idk why I'm generating this here tbh
                         if let Some(io_labels) = self.io_labels.get_mut(itx) {
-                            let converted_read = get_decimal_bytes(r_rate);
-                            let converted_write = get_decimal_bytes(w_rate);
                             *io_labels = (
-                                if r_rate >= GIGA_LIMIT {
-                                    format!("{:.*}{}/s", 1, converted_read.0, converted_read.1)
-                                } else {
-                                    format!("{:.*}{}/s", 0, converted_read.0, converted_read.1)
-                                },
-                                if w_rate >= GIGA_LIMIT {
-                                    format!("{:.*}{}/s", 1, converted_write.0, converted_write.1)
-                                } else {
-                                    format!("{:.*}{}/s", 0, converted_write.0, converted_write.1)
-                                },
+                                dec_bytes_per_second_string(r_rate),
+                                dec_bytes_per_second_string(w_rate),
                             );
                         }
                     }

src/canvas/components/data_table/sortable.rs

@@ -25,11 +25,16 @@ impl SortOrder {
             SortOrder::Descending => SortOrder::Ascending,
         }
     }
+
+    /// A hack to get a const default.
+    pub const fn const_default() -> Self {
+        Self::Ascending
+    }
 }
 
 impl Default for SortOrder {
     fn default() -> Self {
-        Self::Ascending
+        Self::const_default()
     }
 }
 
@@ -195,18 +200,18 @@ where
 
     /// Creates a new [`SortColumn`] with a hard width, which has no shortcut
     /// and sorts by default in ascending order ([`SortOrder::Ascending`]).
-    pub fn hard(inner: T, width: u16) -> Self {
+    pub const fn hard(inner: T, width: u16) -> Self {
         Self {
             inner,
             bounds: ColumnWidthBounds::Hard(width),
             is_hidden: false,
-            default_order: SortOrder::default(),
+            default_order: SortOrder::const_default(),
         }
     }
 
     /// Creates a new [`SortColumn`] with a soft width, which has no shortcut
     /// and sorts by default in ascending order ([`SortOrder::Ascending`]).
-    pub fn soft(inner: T, max_percentage: Option<f32>) -> Self {
+    pub const fn soft(inner: T, max_percentage: Option<f32>) -> Self {
         Self {
             inner,
             bounds: ColumnWidthBounds::Soft {
@@ -214,7 +219,7 @@ where
                 max_percentage,
             },
             is_hidden: false,
-            default_order: SortOrder::default(),
+            default_order: SortOrder::const_default(),
         }
     }
 
@@ -225,7 +230,7 @@ where
     }
 
     /// Sets the default sort order to [`SortOrder::Descending`].
-    pub fn default_descending(mut self) -> Self {
+    pub const fn default_descending(mut self) -> Self {
         self.default_order = SortOrder::Descending;
         self
     }

src/constants.rs

@@ -268,24 +268,34 @@ pub(crate) const CONFIG_TEXT: &str = r#"# This is a default config file for bott
 [flags]
 # Whether to hide the average cpu entry.
 #hide_avg_cpu = false
+
 # Whether to use dot markers rather than braille.
 #dot_marker = false
+
 # The update rate of the application.
 #rate = "1s"
+
 # Whether to put the CPU legend to the left.
 #cpu_left_legend = false
+
 # Whether to set CPU% on a process to be based on the total CPU or just current usage.
 #current_usage = false
+
 # Whether to set CPU% on a process to be based on the total CPU or per-core CPU% (not divided by the number of cpus).
 #unnormalized_cpu = false
+
 # Whether to group processes with the same name together by default.
 #group_processes = false
+
 # Whether to make process searching case sensitive by default.
 #case_sensitive = false
+
 # Whether to make process searching look for matching the entire word by default.
 #whole_word = false
+
 # Whether to make process searching use regex by default.
 #regex = false
+
 # The temperature unit. One of the following, defaults to "c" for Celsius:
 #temperature_type = "c"
 ##temperature_type = "k"
@@ -293,79 +303,112 @@ pub(crate) const CONFIG_TEXT: &str = r#"# This is a default config file for bott
 ##temperature_type = "kelvin"
 ##temperature_type = "fahrenheit"
 ##temperature_type = "celsius"
+
 # The default time interval (in milliseconds).
 #default_time_value = "60s"
+
 # The time delta on each zoom in/out action (in milliseconds).
 #time_delta = 15000
+
 # Hides the time scale.
 #hide_time = false
+
 # Override layout default widget
 #default_widget_type = "proc"
 #default_widget_count = 1
+
 # Expand selected widget upon starting the app
 #expanded = true
+
 # Use basic mode
 #basic = false
+
 # Use the old network legend style
 #use_old_network_legend = false
+
 # Remove space in tables
 #hide_table_gap = false
+
 # Show the battery widgets
 #battery = false
+
 # Disable mouse clicks
 #disable_click = false
+
 # Show memory values in the processes widget as values by default
 #process_memory_as_value = false
+
 # Show tree mode by default in the processes widget.
 #tree = false
+
 # Shows an indicator in table widgets tracking where in the list you are.
 #show_table_scroll_position = false
+
 # Show processes as their commands by default in the process widget.
 #process_command = false
+
 # Displays the network widget with binary prefixes.
 #network_use_binary_prefix = false
+
 # Displays the network widget using bytes.
 #network_use_bytes = false
+
 # Displays the network widget with a log scale.
 #network_use_log = false
+
 # Hides advanced options to stop a process on Unix-like systems.
 #disable_advanced_kill = false
+
 # Hide GPU(s) information
 #disable_gpu = false
+
 # Shows cache and buffer memory
 #enable_cache_memory = false
+
 # How much data is stored at once in terms of time.
 #retention = "10m"
+
 # Where to place the legend for the memory widget. One of "none", "top-left", "top", "top-right", "left", "right", "bottom-left", "bottom", "bottom-right".
 #memory_legend = "top-right"
+
 # Where to place the legend for the network widget. One of "none", "top-left", "top", "top-right", "left", "right", "bottom-left", "bottom", "bottom-right".
 #network_legend = "top-right"
 
+
 # Processes widget configuration
 #[processes]
 # The columns shown by the process widget. The following columns are supported (the GPU columns are only available if the GPU feature is enabled when built):
 # PID, Name, CPU%, Mem%, R/s, W/s, T.Read, T.Write, User, State, Time, GMem%, GPU%
 #columns = ["PID", "Name", "CPU%", "Mem%", "R/s", "W/s", "T.Read", "T.Write", "User", "State", "GMem%", "GPU%"]
 
+
 # CPU widget configuration
 #[cpu]
 # One of "all" (default), "average"/"avg"
 #default = "average"
 
+
 # Disk widget configuration
 #[disk]
+# The columns shown by the process widget. The following columns are supported:
+# Disk, Mount, Used, Free, Total, Used%, Free%, R/s, W/s
+#columns = ["Disk", "Mount", "Used", "Free", "Total", "Used%", "R/s", "W/s"]
 
 # By default, there are no disk name filters enabled. These can be turned on to filter out specific data entries if you
 # don't want to see them. An example use case is provided below.
 #[disk.name_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["/dev/sda\\d+", "/dev/nvme0n1p2"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
@@ -373,51 +416,63 @@ pub(crate) const CONFIG_TEXT: &str = r#"# This is a default config file for bott
 #[disk.mount_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["/mnt/.*", "/boot"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # Temperature widget configuration
 #[temperature]
-
 # By default, there are no temperature sensor filters enabled. An example use case is provided below.
 #[temperature.sensor_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["cpu", "wifi"]
+
 # Whether to use regex. Defaults to false.
 #regex = false
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # Network widget configuration
 #[network]
-
 # By default, there are no network interface filters enabled. An example use case is provided below.
 #[network.interface_filter]
 # Whether to ignore any matches. Defaults to true.
 #is_list_ignored = true
+
 # A list of filters to try and match.
 #list = ["virbr0.*"]
+
 # Whether to use regex. Defaults to false.
 #regex = true
+
 # Whether to be case-sensitive. Defaults to false.
 #case_sensitive = false
+
 # Whether to be require matching the whole word. Defaults to false.
 #whole_word = false
 
+
 # These are all the components that support custom theming.  Note that colour support
 # will depend on terminal support.
 #[styles] # Uncomment if you want to use custom styling
-
 # Built-in themes. Valid values are:
 # - "default"
 # - "default-light"

src/data_conversion.rs

@@ -402,15 +402,15 @@ pub fn convert_network_points(
         };
 
     if need_four_points {
-        let rx_display = format!("{:.*}{}", 1, rx_converted_result.0, rx_converted_result.1);
+        let rx_display = format!("{:.1}{}", rx_converted_result.0, rx_converted_result.1);
         let total_rx_display = Some(format!(
-            "{:.*}{}",
-            1, total_rx_converted_result.0, total_rx_converted_result.1
+            "{:.1}{}",
+            total_rx_converted_result.0, total_rx_converted_result.1
         ));
-        let tx_display = format!("{:.*}{}", 1, tx_converted_result.0, tx_converted_result.1);
+        let tx_display = format!("{:.1}{}", tx_converted_result.0, tx_converted_result.1);
         let total_tx_display = Some(format!(
-            "{:.*}{}",
-            1, total_tx_converted_result.0, total_tx_converted_result.1
+            "{:.1}{}",
+            total_tx_converted_result.0, total_tx_converted_result.1
         ));
         ConvertedNetworkData {
             rx,
@@ -474,35 +474,38 @@ pub fn convert_network_points(
 /// Returns a string given a value that is converted to the closest binary
 /// variant. If the value is greater than a gibibyte, then it will return a
 /// decimal place.
+#[inline]
 pub fn binary_byte_string(value: u64) -> String {
     let converted_values = get_binary_bytes(value);
     if value >= GIBI_LIMIT {
-        format!("{:.*}{}", 1, converted_values.0, converted_values.1)
+        format!("{:.1}{}", converted_values.0, converted_values.1)
     } else {
-        format!("{:.*}{}", 0, converted_values.0, converted_values.1)
+        format!("{:.0}{}", converted_values.0, converted_values.1)
     }
 }
 
 /// Returns a string given a value that is converted to the closest SI-variant.
 /// If the value is greater than a giga-X, then it will return a decimal place.
+#[inline]
 pub fn dec_bytes_per_string(value: u64) -> String {
     let converted_values = get_decimal_bytes(value);
     if value >= GIGA_LIMIT {
-        format!("{:.*}{}", 1, converted_values.0, converted_values.1)
+        format!("{:.1}{}", converted_values.0, converted_values.1)
     } else {
-        format!("{:.*}{}", 0, converted_values.0, converted_values.1)
+        format!("{:.0}{}", converted_values.0, converted_values.1)
     }
 }
 
 /// Returns a string given a value that is converted to the closest SI-variant,
 /// per second. If the value is greater than a giga-X, then it will return a
 /// decimal place.
+#[inline]
 pub fn dec_bytes_per_second_string(value: u64) -> String {
     let converted_values = get_decimal_bytes(value);
     if value >= GIGA_LIMIT {
-        format!("{:.*}{}/s", 1, converted_values.0, converted_values.1)
+        format!("{:.1}{}/s", converted_values.0, converted_values.1)
     } else {
-        format!("{:.*}{}/s", 0, converted_values.0, converted_values.1)
+        format!("{:.0}{}/s", converted_values.0, converted_values.1)
     }
 }
 
@@ -511,9 +514,9 @@ pub fn dec_bytes_per_second_string(value: u64) -> String {
 pub fn dec_bytes_string(value: u64) -> String {
     let converted_values = get_decimal_bytes(value);
     if value >= GIGA_LIMIT {
-        format!("{:.*}{}", 1, converted_values.0, converted_values.1)
+        format!("{:.1}{}", converted_values.0, converted_values.1)
     } else {
-        format!("{:.*}{}", 0, converted_values.0, converted_values.1)
+        format!("{:.0}{}", converted_values.0, converted_values.1)
     }
 }
 

src/main.rs

@@ -279,6 +279,8 @@ fn generate_schema() -> anyhow::Result<()> {
         use itertools::Itertools;
         use strum::VariantArray;
 
+        // TODO: Maybe make this case insensitive? See https://stackoverflow.com/a/68639341
+
         let proc_columns = schema.definitions.get_mut("ProcColumn").unwrap();
         match proc_columns {
             schemars::schema::Schema::Object(proc_columns) => {
@@ -293,6 +295,21 @@ fn generate_schema() -> anyhow::Result<()> {
             }
             _ => anyhow::bail!("missing proc columns definition"),
         }
+
+        let disk_columns = schema.definitions.get_mut("DiskColumn").unwrap();
+        match disk_columns {
+            schemars::schema::Schema::Object(disk_columns) => {
+                let enums = disk_columns.enum_values.as_mut().unwrap();
+                *enums = widgets::DiskColumn::VARIANTS
+                    .iter()
+                    .flat_map(|var| var.get_schema_names())
+                    .sorted()
+                    .map(|v| serde_json::Value::String(v.to_string()))
+                    .dedup()
+                    .collect();
+            }
+            _ => anyhow::bail!("missing disk columns definition"),
+        }
     }
 
     let metadata = schema.schema.metadata.as_mut().unwrap();

src/options.rs

@@ -403,7 +403,11 @@ pub(crate) fn init_app(
                         Disk => {
                             disk_state_map.insert(
                                 widget.widget_id,
-                                DiskTableWidget::new(&app_config_fields, &styling),
+                                DiskTableWidget::new(
+                                    &app_config_fields,
+                                    &styling,
+                                    config.disk.as_ref().map(|cfg| cfg.columns.as_slice()),
+                                ),
                             );
                         }
                         Temp => {

src/options/config/cpu.rs

@@ -6,7 +6,7 @@ use serde::Deserialize;
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[serde(rename_all = "lowercase")]
 #[cfg_attr(test, derive(PartialEq, Eq))]
-pub enum CpuDefault {
+pub(crate) enum CpuDefault {
     #[default]
     All,
     #[serde(alias = "avg")]
@@ -17,9 +17,9 @@ pub enum CpuDefault {
 #[derive(Clone, Debug, Default, Deserialize)]
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[cfg_attr(test, serde(deny_unknown_fields), derive(PartialEq, Eq))]
-pub struct CpuConfig {
+pub(crate) struct CpuConfig {
     #[serde(default)]
-    pub default: CpuDefault,
+    pub(crate) default: CpuDefault,
 }
 
 #[cfg(test)]

src/options/config/disk.rs

@@ -1,15 +1,45 @@
 use serde::Deserialize;
 
+use crate::options::DiskColumn;
+
 use super::IgnoreList;
 
 /// Disk configuration.
 #[derive(Clone, Debug, Default, Deserialize)]
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[cfg_attr(test, serde(deny_unknown_fields), derive(PartialEq, Eq))]
-pub struct DiskConfig {
+pub(crate) struct DiskConfig {
     /// A filter over the disk names.
-    pub name_filter: Option<IgnoreList>,
+    pub(crate) name_filter: Option<IgnoreList>,
 
     /// A filter over the mount names.
-    pub mount_filter: Option<IgnoreList>,
+    pub(crate) mount_filter: Option<IgnoreList>,
+
+    /// A list of disk widget columns.
+    #[serde(default)]
+    pub(crate) columns: Vec<DiskColumn>, // TODO: make this more composable(?) in the future, we might need to rethink how it's done for custom widgets
+}
+
+#[cfg(test)]
+mod test {
+    use super::DiskConfig;
+
+    #[test]
+    fn empty_column_setting() {
+        let config = "";
+        let generated: DiskConfig = toml_edit::de::from_str(config).unwrap();
+        assert!(generated.columns.is_empty());
+    }
+
+    #[test]
+    fn valid_disk_column_settings() {
+        let config = r#"columns = ["disk", "mount", "used", "free", "total", "used%", "free%", "r/s", "w/s"]"#;
+        toml_edit::de::from_str::<DiskConfig>(config).expect("Should succeed!");
+    }
+
+    #[test]
+    fn bad_disk_column_settings() {
+        let config = r#"columns = ["diskk"]"#;
+        toml_edit::de::from_str::<DiskConfig>(config).expect_err("Should error out!");
+    }
 }

src/options/config/network.rs

@@ -6,7 +6,7 @@ use super::IgnoreList;
 #[derive(Clone, Debug, Default, Deserialize)]
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[cfg_attr(test, serde(deny_unknown_fields), derive(PartialEq, Eq))]
-pub struct NetworkConfig {
+pub(crate) struct NetworkConfig {
     /// A filter over the network interface names.
-    pub interface_filter: Option<IgnoreList>,
+    pub(crate) interface_filter: Option<IgnoreList>,
 }

src/options/config/process.rs

@@ -6,10 +6,10 @@ use crate::widgets::ProcColumn;
 #[derive(Clone, Debug, Default, Deserialize)]
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[cfg_attr(test, serde(deny_unknown_fields), derive(PartialEq, Eq))]
-pub struct ProcessesConfig {
+pub(crate) struct ProcessesConfig {
     /// A list of process widget columns.
     #[serde(default)]
-    pub columns: Vec<ProcColumn>,
+    pub(crate) columns: Vec<ProcColumn>, // TODO: make this more composable(?) in the future, we might need to rethink how it's done for custom widgets
 }
 
 #[cfg(test)]
@@ -32,7 +32,7 @@ mod test {
     }
 
     #[test]
-    fn process_column_settings() {
+    fn valid_process_column_config() {
         let config = r#"
             columns = ["CPU%", "PiD", "user", "MEM", "Tread", "T.Write", "Rps", "W/s", "tiMe", "USER", "state"]
         "#;
@@ -57,13 +57,13 @@ mod test {
     }
 
     #[test]
-    fn process_column_settings_2() {
+    fn bad_process_column_config() {
         let config = r#"columns = ["MEM", "TWrite", "Cpuz", "read", "wps"]"#;
         toml_edit::de::from_str::<ProcessesConfig>(config).expect_err("Should error out!");
     }
 
     #[test]
-    fn process_column_settings_3() {
+    fn valid_process_column_config_2() {
         let config = r#"columns = ["Twrite", "T.Write"]"#;
         let generated: ProcessesConfig = toml_edit::de::from_str(config).unwrap();
         assert_eq!(

src/options/config/temperature.rs

@@ -6,7 +6,7 @@ use super::IgnoreList;
 #[derive(Clone, Debug, Default, Deserialize)]
 #[cfg_attr(feature = "generate_schema", derive(schemars::JsonSchema))]
 #[cfg_attr(test, serde(deny_unknown_fields), derive(PartialEq, Eq))]
-pub struct TempConfig {
+pub(crate) struct TempConfig {
     /// A filter over the sensor names.
-    pub sensor_filter: Option<IgnoreList>,
+    pub(crate) sensor_filter: Option<IgnoreList>,
 }

src/widgets/cpu_graph.rs

@@ -165,7 +165,7 @@ pub struct CpuWidgetState {
 }
 
 impl CpuWidgetState {
-    pub fn new(
+    pub(crate) fn new(
         config: &AppConfigFields, default_selection: CpuDefault, current_display_time: u64,
         autohide_timer: Option<Instant>, colours: &ColourPalette,
     ) -> Self {

src/widgets/disk_table.rs

@@ -1,5 +1,7 @@
 use std::{borrow::Cow, cmp::max, num::NonZeroU16};
 
+use serde::Deserialize;
+
 use crate::{
     app::AppConfigFields,
     canvas::components::data_table::{
@@ -26,11 +28,7 @@ impl DiskWidgetData {
     fn total_space(&self) -> Cow<'static, str> {
         if let Some(total_bytes) = self.total_bytes {
             let converted_total_space = get_decimal_bytes(total_bytes);
-            format!(
-                "{:.*}{}",
-                0, converted_total_space.0, converted_total_space.1
-            )
-            .into()
+            format!("{:.0}{}", converted_total_space.0, converted_total_space.1).into()
         } else {
             "N/A".into()
         }
@@ -39,7 +37,7 @@ impl DiskWidgetData {
     fn free_space(&self) -> Cow<'static, str> {
         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()
+            format!("{:.0}{}", converted_free_space.0, converted_free_space.1).into()
         } else {
             "N/A".into()
         }
@@ -48,7 +46,7 @@ impl DiskWidgetData {
     fn used_space(&self) -> Cow<'static, str> {
         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()
+            format!("{:.0}{}", converted_free_space.0, converted_free_space.1).into()
         } else {
             "N/A".into()
         }
@@ -58,16 +56,13 @@ impl DiskWidgetData {
         if let (Some(free_bytes), Some(summed_total_bytes)) =
             (self.free_bytes, self.summed_total_bytes)
         {
+            if summed_total_bytes > 0 {
                 Some(free_bytes as f64 / summed_total_bytes as f64 * 100_f64)
             } else {
                 None
             }
-    }
-
-    fn free_percent_string(&self) -> Cow<'static, str> {
-        match self.free_percent() {
-            Some(val) => format!("{val:.1}%").into(),
-            None => "N/A".into(),
+        } else {
+            None
         }
     }
 
@@ -84,16 +79,15 @@ impl DiskWidgetData {
             None
         }
     }
-
-    fn used_percent_string(&self) -> Cow<'static, str> {
-        match self.used_percent() {
-            Some(val) => format!("{val:.1}%").into(),
-            None => "N/A".into(),
-        }
-    }
 }
 
-pub enum DiskWidgetColumn {
+#[derive(Debug, Clone)]
+#[cfg_attr(
+    feature = "generate_schema",
+    derive(schemars::JsonSchema, strum::VariantArray)
+)]
+#[cfg_attr(test, derive(PartialEq, Eq))]
+pub enum DiskColumn {
     Disk,
     Mount,
     Used,
@@ -105,45 +99,91 @@ pub enum DiskWidgetColumn {
     IoWrite,
 }
 
-impl ColumnHeader for DiskWidgetColumn {
+impl<'de> Deserialize<'de> for DiskColumn {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let value = String::deserialize(deserializer)?.to_lowercase();
+        match value.as_str() {
+            "disk" => Ok(DiskColumn::Disk),
+            "mount" => Ok(DiskColumn::Mount),
+            "used" => Ok(DiskColumn::Used),
+            "free" => Ok(DiskColumn::Free),
+            "total" => Ok(DiskColumn::Total),
+            "usedpercent" | "used%" => Ok(DiskColumn::UsedPercent),
+            "freepercent" | "free%" => Ok(DiskColumn::FreePercent),
+            "r/s" => Ok(DiskColumn::IoRead),
+            "w/s" => Ok(DiskColumn::IoWrite),
+            _ => Err(serde::de::Error::custom(
+                "doesn't match any disk column name",
+            )),
+        }
+    }
+}
+
+impl DiskColumn {
+    /// An ugly hack to generate the JSON schema.
+    #[cfg(feature = "generate_schema")]
+    pub fn get_schema_names(&self) -> &[&'static str] {
+        match self {
+            DiskColumn::Disk => &["Disk"],
+            DiskColumn::Mount => &["Mount"],
+            DiskColumn::Used => &["Used"],
+            DiskColumn::Free => &["Free"],
+            DiskColumn::Total => &["Total"],
+            DiskColumn::UsedPercent => &["Used%"],
+            DiskColumn::FreePercent => &["Free%"],
+            DiskColumn::IoRead => &["R/s", "Read", "Rps"],
+            DiskColumn::IoWrite => &["W/s", "Write", "Wps"],
+        }
+    }
+}
+
+impl ColumnHeader for DiskColumn {
     fn text(&self) -> Cow<'static, str> {
         match self {
-            DiskWidgetColumn::Disk => "Disk(d)",
-            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)",
+            DiskColumn::Disk => "Disk(d)",
+            DiskColumn::Mount => "Mount(m)",
+            DiskColumn::Used => "Used(u)",
+            DiskColumn::Free => "Free(n)",
+            DiskColumn::Total => "Total(t)",
+            DiskColumn::UsedPercent => "Used%(p)",
+            DiskColumn::FreePercent => "Free%",
+            DiskColumn::IoRead => "R/s(r)",
+            DiskColumn::IoWrite => "W/s(w)",
         }
         .into()
     }
 }
 
-impl DataToCell<DiskWidgetColumn> for DiskWidgetData {
+impl DataToCell<DiskColumn> for DiskWidgetData {
     fn to_cell(
-        &self, column: &DiskWidgetColumn, _calculated_width: NonZeroU16,
+        &self, column: &DiskColumn, _calculated_width: NonZeroU16,
     ) -> Option<Cow<'static, str>> {
+        fn percent_string(value: Option<f64>) -> Cow<'static, str> {
+            match value {
+                Some(val) => format!("{val:.1}%").into(),
+                None => "N/A".into(),
+            }
+        }
+
         let text = match column {
-            DiskWidgetColumn::Disk => self.name.clone(),
-            DiskWidgetColumn::Mount => self.mount_point.clone(),
-            DiskWidgetColumn::Used => self.used_space(),
-            DiskWidgetColumn::Free => self.free_space(),
-            DiskWidgetColumn::UsedPercent => self.used_percent_string(),
-            DiskWidgetColumn::FreePercent => self.free_percent_string(),
-            DiskWidgetColumn::Total => self.total_space(),
-            DiskWidgetColumn::IoRead => self.io_read.clone(),
-            DiskWidgetColumn::IoWrite => self.io_write.clone(),
+            DiskColumn::Disk => self.name.clone(),
+            DiskColumn::Mount => self.mount_point.clone(),
+            DiskColumn::Used => self.used_space(),
+            DiskColumn::Free => self.free_space(),
+            DiskColumn::UsedPercent => percent_string(self.used_percent()),
+            DiskColumn::FreePercent => percent_string(self.free_percent()),
+            DiskColumn::Total => self.total_space(),
+            DiskColumn::IoRead => self.io_read.clone(),
+            DiskColumn::IoWrite => self.io_write.clone(),
         };
 
         Some(text)
     }
 
-    fn column_widths<C: DataTableColumn<DiskWidgetColumn>>(
-        data: &[Self], _columns: &[C],
-    ) -> Vec<u16>
+    fn column_widths<C: DataTableColumn<DiskColumn>>(data: &[Self], _columns: &[C]) -> Vec<u16>
     where
         Self: Sized,
     {
@@ -159,63 +199,85 @@ impl DataToCell<DiskWidgetColumn> for DiskWidgetData {
 }
 
 pub struct DiskTableWidget {
-    pub table: SortDataTable<DiskWidgetData, DiskWidgetColumn>,
+    pub table: SortDataTable<DiskWidgetData, DiskColumn>,
     pub force_update_data: bool,
 }
 
-impl SortsRow for DiskWidgetColumn {
+impl SortsRow for DiskColumn {
     type DataType = DiskWidgetData;
 
     fn sort_data(&self, data: &mut [Self::DataType], descending: bool) {
         match self {
-            DiskWidgetColumn::Disk => {
+            DiskColumn::Disk => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.name, &b.name));
             }
-            DiskWidgetColumn::Mount => {
+            DiskColumn::Mount => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.mount_point, &b.mount_point));
             }
-            DiskWidgetColumn::Used => {
+            DiskColumn::Used => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.used_bytes, &b.used_bytes));
             }
-            DiskWidgetColumn::UsedPercent => {
+            DiskColumn::UsedPercent => {
                 data.sort_by(|a, b| {
                     sort_partial_fn(descending)(&a.used_percent(), &b.used_percent())
                 });
             }
-            DiskWidgetColumn::Free => {
+            DiskColumn::Free => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.free_bytes, &b.free_bytes));
             }
-            DiskWidgetColumn::FreePercent => {
+            DiskColumn::FreePercent => {
                 data.sort_by(|a, b| {
                     sort_partial_fn(descending)(&a.free_percent(), &b.free_percent())
                 });
             }
-            DiskWidgetColumn::Total => {
+            DiskColumn::Total => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.total_bytes, &b.total_bytes));
             }
-            DiskWidgetColumn::IoRead => {
+            DiskColumn::IoRead => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.io_read, &b.io_read));
             }
-            DiskWidgetColumn::IoWrite => {
+            DiskColumn::IoWrite => {
                 data.sort_by(|a, b| sort_partial_fn(descending)(&a.io_write, &b.io_write));
             }
         }
     }
 }
 
-impl DiskTableWidget {
-    pub fn new(config: &AppConfigFields, palette: &ColourPalette) -> Self {
-        let columns = [
-            SortColumn::soft(DiskWidgetColumn::Disk, Some(0.2)),
-            SortColumn::soft(DiskWidgetColumn::Mount, Some(0.2)),
-            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(),
-        ];
+const fn create_column(column_type: &DiskColumn) -> SortColumn<DiskColumn> {
+    match column_type {
+        DiskColumn::Disk => SortColumn::soft(DiskColumn::Disk, Some(0.2)),
+        DiskColumn::Mount => SortColumn::soft(DiskColumn::Mount, Some(0.2)),
+        DiskColumn::Used => SortColumn::hard(DiskColumn::Used, 8).default_descending(),
+        DiskColumn::Free => SortColumn::hard(DiskColumn::Free, 8).default_descending(),
+        DiskColumn::Total => SortColumn::hard(DiskColumn::Total, 9).default_descending(),
+        DiskColumn::UsedPercent => {
+            SortColumn::hard(DiskColumn::UsedPercent, 9).default_descending()
+        }
+        DiskColumn::FreePercent => {
+            SortColumn::hard(DiskColumn::FreePercent, 9).default_descending()
+        }
+        DiskColumn::IoRead => SortColumn::hard(DiskColumn::IoRead, 10).default_descending(),
+        DiskColumn::IoWrite => SortColumn::hard(DiskColumn::IoWrite, 11).default_descending(),
+    }
+}
 
+const fn default_disk_columns() -> [SortColumn<DiskColumn>; 8] {
+    [
+        create_column(&DiskColumn::Disk),
+        create_column(&DiskColumn::Mount),
+        create_column(&DiskColumn::Used),
+        create_column(&DiskColumn::Free),
+        create_column(&DiskColumn::Total),
+        create_column(&DiskColumn::UsedPercent),
+        create_column(&DiskColumn::IoRead),
+        create_column(&DiskColumn::IoWrite),
+    ]
+}
+
+impl DiskTableWidget {
+    pub fn new(
+        config: &AppConfigFields, palette: &ColourPalette, columns: Option<&[DiskColumn]>,
+    ) -> Self {
         let props = SortDataTableProps {
             inner: DataTableProps {
                 title: Some(" Disks ".into()),
@@ -231,11 +293,20 @@ impl DiskTableWidget {
 
         let styling = DataTableStyling::from_palette(palette);
 
+        match columns {
+            Some(columns) => {
+                let columns = columns.iter().map(create_column).collect::<Vec<_>>();
                 Self {
                     table: SortDataTable::new_sortable(columns, props, styling),
                     force_update_data: false,
                 }
             }
+            None => Self {
+                table: SortDataTable::new_sortable(default_disk_columns(), props, styling),
+                force_update_data: false,
+            },
+        }
+    }
 
     /// Forces an update of the data stored.
     #[inline]

src/widgets/process_table/process_columns.rs

@@ -94,28 +94,14 @@ impl ColumnHeader for ProcColumn {
 
     fn header(&self) -> Cow<'static, str> {
         match self {
-            ProcColumn::CpuPercent => "CPU%(c)",
-            ProcColumn::MemValue => "Mem(m)",
-            ProcColumn::MemPercent => "Mem%(m)",
-            ProcColumn::Pid => "PID(p)",
-            ProcColumn::Count => "Count",
-            ProcColumn::Name => "Name(n)",
-            ProcColumn::Command => "Command(n)",
-            ProcColumn::ReadPerSecond => "R/s",
-            ProcColumn::WritePerSecond => "W/s",
-            ProcColumn::TotalRead => "T.Read",
-            ProcColumn::TotalWrite => "T.Write",
-            ProcColumn::State => "State",
-            ProcColumn::User => "User",
-            ProcColumn::Time => "Time",
-            #[cfg(feature = "gpu")]
-            ProcColumn::GpuMemValue => "GMem",
-            #[cfg(feature = "gpu")]
-            ProcColumn::GpuMemPercent => "GMem%",
-            #[cfg(feature = "gpu")]
-            ProcColumn::GpuUtilPercent => "GPU%",
+            ProcColumn::CpuPercent => "CPU%(c)".into(),
+            ProcColumn::MemValue => "Mem(m)".into(),
+            ProcColumn::MemPercent => "Mem%(m)".into(),
+            ProcColumn::Pid => "PID(p)".into(),
+            ProcColumn::Name => "Name(n)".into(),
+            ProcColumn::Command => "Command(n)".into(),
+            _ => self.text(),
         }
-        .into()
     }
 }
 
@@ -214,7 +200,9 @@ impl<'de> Deserialize<'de> for ProcColumn {
             "gmem" | "gmem%" => Ok(ProcColumn::GpuMemPercent),
             #[cfg(feature = "gpu")]
             "gpu%" => Ok(ProcColumn::GpuUtilPercent),
-            _ => Err(serde::de::Error::custom("doesn't match any column type")),
+            _ => Err(serde::de::Error::custom(
+                "doesn't match any process column name",
+            )),
         }
     }
 }

tests/integration/invalid_config_tests.rs

@@ -131,3 +131,11 @@ fn test_invalid_process_column() {
         .failure()
         .stderr(predicate::str::contains("doesn't match"));
 }
+
+#[test]
+fn test_invalid_disk_column() {
+    btm_command(&["-C", "./tests/invalid_configs/invalid_disk_column.toml"])
+        .assert()
+        .failure()
+        .stderr(predicate::str::contains("doesn't match"));
+}

tests/invalid_configs/invalid_disk_column.toml

@@ -0,0 +1,2 @@
+[disk]
+columns = ["disk", "fake"]

tests/valid_configs/theme.toml

@@ -1,4 +1,5 @@
 #:schema none
+# Adding this to avoid a warning from some schema linters
 
 [styles]
 theme = "gruvbox"