Regex filter added. This is a very rudimentary implementation, but I feel it's good enough for now.

README.md

@@ -6,6 +6,30 @@ A graphical top clone, written in Rust. Inspired by both [gtop](https://github.c
 
 ![Quick demo recording](assets/recording_1.gif)
 
+## Features
+
+Features of bottom include:
+
+- CPU widget to show a visual representation of per-core usage. Average CPU display also exists.
+
+- Memory widget to show a visual representation of both RAM and SWAP usage.
+
+- Networks widget to show a log-based visual representation of network usage.
+
+- Sortable and searchable process widget. Searching supports regex, and you can search by PID and process name.
+
+- Disks widget to display usage and I/O per second.
+
+- Temperature widget to monitor detected sensors in your system.
+
+The compatibility of each widget and operating systems are, as of version 0.1.0, as follows:
+
+| OS/Widget | CPU      | Memory   | Disks    | Temperature           | Processes | Networks                                      |
+| --------- | -------- | -------- | -------- | --------------------- | --------- | --------------------------------------------- |
+| Linux     | ✓        | ✓        | ✓        | ✓                     | ✓         | ✓                                             |
+| Windows   | ✓        | ✓        | ✓        | Currently not working | ✓         | Partially supported (total RX/TX unavailable) |
+| macOS     | Untested | Untested | Untested | Untested              | Untested  | Untested                                      |
+
 ## Installation
 
 ### Linux
@@ -24,16 +48,6 @@ You can install the in-development version by cloning and using `cargo build --r
 
 macOS support will hopefully come soon<sup>TM</sup>.
 
-## Support
-
-The compatibility of each widget and operating systems are, as of version 0.1.0, as follows:
-
-| OS/Widget | CPU      | Memory   | Disks    | Temperature           | Processes | Networks                                      |
-| --------- | -------- | -------- | -------- | --------------------- | --------- | --------------------------------------------- |
-| Linux     | ✓        | ✓        | ✓        | ✓                     | ✓         | ✓                                             |
-| Windows   | ✓        | ✓        | ✓        | Currently not working | ✓         | Partially supported (total RX/TX unavailable) |
-| macOS     | Untested | Untested | Untested | Untested              | Untested  | Untested                                      |
-
 ## Usage
 
 Run using `btm`.
@@ -102,11 +116,19 @@ Run using `btm`.
 
 - `Tab` to group together processes with the same name. Disables PID sorting. `dd` will now kill all processes covered by that name.
 
-- `Ctrl-f` or `/` to toggle a search box for finding a process. Press `Ctrl-p` or `Ctrl-n` within the search bar widget to switch between searching for PID and name respectively. Press `Esc` or `Ctrl-f` to close it.
+- `Ctrl-f` or `/` to open the search widget.
+
+#### Search Widget
+
+- `Ctrl-p` or `Ctrl-n` to switch between searching for PID and name respectively.
+
+- `Esc` or `Ctrl-f` to close.
+
+Note that `q` is disabled while in the search widget.
 
 ### Mouse actions
 
-- Scrolling with the mouse will scroll through the currently selected list, similar to using the up/down arrow keys.
+- Scrolling with the mouse will scroll through the currently selected list.
 
 ## Thanks, kudos, and all the like
 

src/app.rs

@@ -25,6 +25,11 @@ pub enum ScrollDirection {
 	DOWN,
 }
 
+lazy_static! {
+	static ref BASE_REGEX: std::result::Result<regex::Regex, regex::Error> =
+		regex::Regex::new(".*");
+}
+
 pub struct App {
 	// Sorting
 	pub process_sorting_type: processes::ProcessSorting,
@@ -61,6 +66,7 @@ pub struct App {
 	enable_searching: bool,
 	current_search_query: String,
 	searching_pid: bool,
+	current_regex: std::result::Result<regex::Regex, regex::Error>,
 }
 
 impl App {
@@ -103,6 +109,7 @@ impl App {
 			enable_searching: false,
 			current_search_query: String::default(),
 			searching_pid: false,
+			current_regex: BASE_REGEX.clone(), //TODO: [OPT] seems like a thing we can switch to lt for if not fast
 		}
 	}
 
@@ -214,7 +221,7 @@ impl App {
 		self.searching_pid
 	}
 
-	pub fn get_current_search_phrase(&self) -> &String {
+	pub fn get_current_search_query(&self) -> &String {
 		&self.current_search_query
 	}
 
@@ -232,6 +239,18 @@ impl App {
 					self.show_dd = false;
 				}
 			}
+		} else if let ApplicationPosition::ProcessSearch = self.current_application_position {
+			// Generate regex.
+
+			// TODO: [OPT] if we can get this to work WITHOUT pressing enter that would be good.
+			// However, this will be a bit hard without a thorough look at optimization to avoid
+			// wasteful regex generation.
+
+			self.current_regex = if self.current_search_query.is_empty() {
+				BASE_REGEX.clone()
+			} else {
+				regex::Regex::new(&(self.current_search_query))
+			};
 		}
 	}
 
@@ -241,6 +260,10 @@ impl App {
 		}
 	}
 
+	pub fn get_current_regex_matcher(&self) -> &std::result::Result<regex::Regex, regex::Error> {
+		&self.current_regex
+	}
+
 	pub fn on_char_key(&mut self, caught_char: char) {
 		// Forbid any char key presses when showing a dialog box...
 		if !self.is_in_dialog() {

src/canvas.rs

@@ -47,7 +47,7 @@ lazy_static! {
 		Text::raw("p to sort by PID.\n"),
 		Text::raw("n to sort by process name.\n"),
 		Text::raw("Tab to group together processes with the same name.\n"),
-		Text::raw("Ctrl-f or / to toggle searching for a process.  Use Ctrl-p and Ctrl-n to toggle between searching for PID and name.\n"),
+		Text::raw("Ctrl-f to toggle searching for a process.  / to just open it.  Use Ctrl-p and Ctrl-n to toggle between searching for PID and name.\n"),
 		Text::raw("\nFor startup flags, type in \"btm -h\".")
 	];
 	static ref COLOUR_LIST: Vec<Color> = gen_n_colours(constants::NUM_COLOURS);
@@ -838,27 +838,39 @@ fn draw_disk_table<B: backend::Backend>(
 fn draw_search_field<B: backend::Backend>(
 	f: &mut Frame<B>, app_state: &mut app::App, draw_loc: Rect,
 ) {
+	let width = draw_loc.width - 10;
+	let query = app_state.get_current_search_query();
+	let shrunk_query = if query.len() < width as usize {
+		query
+	} else {
+		&query[(query.len() - width as usize)..]
+	};
+
 	let search_text = [
 		if app_state.is_searching_with_pid() {
-			Text::styled("\nPID: ", Style::default().fg(TABLE_HEADER_COLOUR))
+			Text::styled("\nPID : ", Style::default().fg(TABLE_HEADER_COLOUR))
 		} else {
 			Text::styled("\nName: ", Style::default().fg(TABLE_HEADER_COLOUR))
 		},
-		Text::raw(app_state.get_current_search_phrase()),
+		Text::raw(shrunk_query),
 	];
 	Paragraph::new(search_text.iter())
 		.block(
 			Block::default()
-				.title("Search (Ctrl-p and Ctrl-n to switch search types, Esc or Ctrl-f to close)")
+				.title("Search (Ctrl-p and Ctrl-n to switch search types, Esc or Ctrl-f to close, Enter to search)")
 				.borders(Borders::ALL)
-				.border_style(match app_state.current_application_position {
-					app::ApplicationPosition::ProcessSearch => *CANVAS_HIGHLIGHTED_BORDER_STYLE,
-					_ => *CANVAS_BORDER_STYLE,
+				.border_style(if app_state.get_current_regex_matcher().is_err() {
+					Style::default().fg(Color::Red)
+				} else {
+					match app_state.current_application_position {
+						app::ApplicationPosition::ProcessSearch => *CANVAS_HIGHLIGHTED_BORDER_STYLE,
+						_ => *CANVAS_BORDER_STYLE,
+					}
 				}),
 		)
 		.style(Style::default().fg(Color::Gray))
 		.alignment(Alignment::Left)
-		.wrap(true) // TODO: We want this to keep going right... slicing?
+		.wrap(false)
 		.render(f, draw_loc);
 }
 

src/data_conversion.rs

@@ -1,9 +1,13 @@
+//! This mainly concerns converting collected data into things that the canvas
+//! can actually handle.
+
 use crate::{
 	app::data_collection,
 	constants,
 	utils::gen_util::{get_exact_byte_values, get_simple_byte_values},
 };
 use constants::*;
+use regex::Regex;
 
 #[derive(Default, Debug)]
 pub struct ConvertedNetworkData {
@@ -137,11 +141,23 @@ pub fn update_disk_row(app_data: &data_collection::Data) -> Vec<Vec<String>> {
 }
 
 pub fn update_process_row(
-	app_data: &data_collection::Data,
+	app_data: &data_collection::Data, regex_matcher: &std::result::Result<Regex, regex::Error>,
+	use_pid: bool,
 ) -> (Vec<ConvertedProcessData>, Vec<ConvertedProcessData>) {
 	let process_vector: Vec<ConvertedProcessData> = app_data
 		.list_of_processes
 		.iter()
+		.filter(|process| {
+			if let Ok(matcher) = regex_matcher {
+				if use_pid {
+					matcher.is_match(&process.pid.to_string())
+				} else {
+					matcher.is_match(&process.name)
+				}
+			} else {
+				true
+			}
+		})
 		.map(|process| ConvertedProcessData {
 			pid: process.pid,
 			name: process.name.to_string(),
@@ -168,6 +184,17 @@ pub fn update_process_row(
 	if let Some(grouped_list_of_processes) = &app_data.grouped_list_of_processes {
 		grouped_process_vector = grouped_list_of_processes
 			.iter()
+			.filter(|process| {
+				if let Ok(matcher) = regex_matcher {
+					if use_pid {
+						matcher.is_match(&process.pid.to_string())
+					} else {
+						matcher.is_match(&process.name)
+					}
+				} else {
+					true
+				}
+			})
 			.map(|process| ConvertedProcessData {
 				pid: process.pid,
 				name: process.name.to_string(),

src/main.rs

@@ -384,7 +384,11 @@ fn handle_process_sorting(app: &mut app::App) {
 		app.process_sorting_reverse,
 	);
 
-	let tuple_results = update_process_row(&app.data);
+	let tuple_results = update_process_row(
+		&app.data,
+		app.get_current_regex_matcher(),
+		app.is_searching_with_pid(),
+	);
 	app.canvas_data.process_data = tuple_results.0;
 	app.canvas_data.grouped_process_data = tuple_results.1;
 }