use ratatui::style::{Color, Modifier, Style};
use std::path::Path;
#[derive(Clone, Debug)]
pub struct Theme {
pub tab_active: Color,
pub tab_inactive: Color,
pub tab_bar_bg: Color,
pub diff_add_fg: Color,
pub diff_add_bg: Color,
pub diff_delete_fg: Color,
pub diff_delete_bg: Color,
pub diff_context_bg: Color,
pub diff_header_fg: Color,
pub selection_bg: Color,
pub selection_fg: Color,
pub border: Color,
pub border_focused: Color,
pub title_fg: Color,
pub dim_text: Color,
pub normal_bg: Color,
pub light_bg: Color,
pub file_entry: Color,
pub file_entry_staged: Color,
pub file_entry_modified: Color,
pub file_entry_untracked: Color,
pub commit_hash: Color,
pub commit_msg: Color,
pub commit_author: Color,
pub commit_date: Color,
pub stash_msg: Color,
pub help_key: Color,
pub help_desc: Color,
pub mode_indicator_bg: Color,
pub status_added: Color,
pub status_deleted: Color,
pub status_modified: Color,
pub diff_delete_highlight: Style,
pub diff_add_highlight: Style,
pub line_number_fg: Color,
pub syntax_theme_name: String,
}
fn parse_color(s: &str) -> Option<Color> {
let s = s.trim();
if s == "Reset" {
return Some(Color::Reset);
}
if s == "Black" {
return Some(Color::Black);
}
if s == "Red" {
return Some(Color::Red);
}
if s == "Green" {
return Some(Color::Green);
}
if s == "Yellow" {
return Some(Color::Yellow);
}
if s == "Blue" {
return Some(Color::Blue);
}
if s == "Magenta" {
return Some(Color::Magenta);
}
if s == "Cyan" {
return Some(Color::Cyan);
}
if s == "White" {
return Some(Color::White);
}
if s == "DarkGray" {
return Some(Color::DarkGray);
}
if s == "LightRed" {
return Some(Color::LightRed);
}
if s == "LightGreen" {
return Some(Color::LightGreen);
}
if s == "LightYellow" {
return Some(Color::LightYellow);
}
if s == "LightBlue" {
return Some(Color::LightBlue);
}
if s == "LightMagenta" {
return Some(Color::LightMagenta);
}
if s == "LightCyan" {
return Some(Color::LightCyan);
}
if s.starts_with('#') && s.len() == 7 {
let r = u8::from_str_radix(&s[1..3], 16).ok()?;
let g = u8::from_str_radix(&s[3..5], 16).ok()?;
let b = u8::from_str_radix(&s[5..7], 16).ok()?;
return Some(Color::Rgb(r, g, b));
}
None
}
fn parse_ron_color_value(s: &str) -> Option<Color> {
let s = s.trim();
if s.starts_with('"') && s.ends_with('"') {
return parse_color(&s[1..s.len() - 1]);
}
parse_color(s)
}
impl Theme {
pub fn dark() -> Self {
Self {
tab_active: Color::White,
tab_inactive: Color::DarkGray,
tab_bar_bg: Color::Reset,
diff_add_fg: Color::Green,
diff_add_bg: Color::Rgb(0x00, 0x28, 0x00),
diff_delete_fg: Color::Red,
diff_delete_bg: Color::Rgb(0x3f, 0x00, 0x01),
diff_context_bg: Color::Reset,
diff_header_fg: Color::Blue,
selection_bg: Color::Blue,
selection_fg: Color::White,
border: Color::DarkGray,
border_focused: Color::Reset,
title_fg: Color::White,
dim_text: Color::DarkGray,
normal_bg: Color::Reset,
light_bg: Color::Reset,
file_entry: Color::White,
file_entry_staged: Color::LightGreen,
file_entry_modified: Color::Yellow,
file_entry_untracked: Color::DarkGray,
commit_hash: Color::Magenta,
commit_msg: Color::White,
commit_author: Color::Green,
commit_date: Color::LightCyan,
stash_msg: Color::LightMagenta,
help_key: Color::White,
help_desc: Color::DarkGray,
mode_indicator_bg: Color::Reset,
status_added: Color::LightGreen,
status_deleted: Color::LightRed,
status_modified: Color::Yellow,
diff_delete_highlight: Style::default().fg(Color::LightRed).bg(Color::Rgb(0x90, 0x10, 0x11)),
diff_add_highlight: Style::default().fg(Color::LightGreen).bg(Color::Rgb(0x00, 0x60, 0x00)),
line_number_fg: Color::Rgb(0x58, 0x58, 0x58),
syntax_theme_name: "Monokai Extended".to_string(),
}
}
pub fn light() -> Self {
Self {
tab_active: Color::Black,
tab_inactive: Color::DarkGray,
tab_bar_bg: Color::Reset,
diff_add_fg: Color::Green,
diff_add_bg: Color::Rgb(0xd0, 0xff, 0xd0),
diff_delete_fg: Color::Red,
diff_delete_bg: Color::Rgb(0xff, 0xe0, 0xe0),
diff_context_bg: Color::Reset,
diff_header_fg: Color::Blue,
selection_bg: Color::Blue,
selection_fg: Color::White,
border: Color::DarkGray,
border_focused: Color::Reset,
title_fg: Color::Black,
dim_text: Color::DarkGray,
normal_bg: Color::Reset,
light_bg: Color::Reset,
file_entry: Color::Black,
file_entry_staged: Color::Green,
file_entry_modified: Color::Yellow,
file_entry_untracked: Color::DarkGray,
commit_hash: Color::Magenta,
commit_msg: Color::Black,
commit_author: Color::Green,
commit_date: Color::LightCyan,
stash_msg: Color::LightMagenta,
help_key: Color::Blue,
help_desc: Color::DarkGray,
mode_indicator_bg: Color::Reset,
status_added: Color::Green,
status_deleted: Color::Red,
status_modified: Color::Yellow,
diff_delete_highlight: Style::default().fg(Color::Red).bg(Color::Rgb(0xff, 0xc0, 0xc0)),
diff_add_highlight: Style::default().fg(Color::Green).bg(Color::Rgb(0xa0, 0xef, 0xa0)),
line_number_fg: Color::Rgb(0x99, 0x99, 0x99),
syntax_theme_name: "GitHub".to_string(),
}
}
pub fn from_path(path: &Path) -> anyhow::Result<Self> {
let content = std::fs::read_to_string(path)?;
Self::from_ron(&content)
}
pub fn from_ron(input: &str) -> anyhow::Result<Self> {
let mut theme = Theme::dark();
let input = input.trim();
if !input.starts_with('(') || !input.ends_with(')') {
anyhow::bail!("Invalid RON format: expected (...)");
}
let inner = &input[1..input.len() - 1].trim();
for field in split_ron_fields(inner) {
let field = field.trim();
if let Some(eq_pos) = field.find(':') {
let key = field[..eq_pos].trim().trim_matches('"');
let value = field[eq_pos + 1..].trim();
if let Some(color) = parse_ron_color_value(value) {
apply_field(&mut theme, key, color);
}
}
}
Ok(theme)
}
pub fn tab_active_style(&self) -> Style {
Style::default()
.fg(self.tab_active)
.add_modifier(Modifier::BOLD)
}
pub fn tab_inactive_style(&self) -> Style {
Style::default().fg(self.tab_inactive)
}
pub fn tab_bar_style(&self) -> Style {
Style::default()
}
pub fn diff_add(&self, selected: bool) -> Style {
let base = Style::default().fg(self.diff_add_fg).bg(self.diff_add_bg);
if selected {
Style::default().fg(self.selection_fg).bg(self.selection_bg)
} else {
base
}
}
pub fn diff_delete(&self, selected: bool) -> Style {
let base = Style::default().fg(self.diff_delete_fg).bg(self.diff_delete_bg);
if selected {
Style::default().fg(self.selection_fg).bg(self.selection_bg)
} else {
base
}
}
pub fn diff_context(&self, selected: bool) -> Style {
let base = Style::default().bg(self.diff_context_bg);
if selected {
Style::default().fg(self.selection_fg).bg(self.selection_bg)
} else {
base
}
}
pub fn diff_header(&self) -> Style {
Style::default()
.fg(self.diff_header_fg)
.add_modifier(Modifier::BOLD)
}
pub fn selected(&self) -> Style {
Style::default().fg(self.selection_fg).bg(self.selection_bg)
}
pub fn border_style(&self) -> Style {
Style::default().fg(self.border)
}
pub fn border_focused_style(&self) -> Style {
Style::default().fg(self.border_focused)
}
pub fn title(&self) -> Style {
Style::default()
.fg(self.title_fg)
.add_modifier(Modifier::BOLD)
}
pub fn dim_text(&self) -> Style {
Style::default().fg(self.dim_text)
}
pub fn line_number_style(&self) -> Style {
Style::default().fg(self.line_number_fg)
}
pub fn normal(&self) -> Style {
Style::default()
}
pub fn commit_hash(&self, selected: bool) -> Style {
if selected {
self.selected()
} else {
Style::default().fg(self.commit_hash)
}
}
pub fn commit_msg(&self, selected: bool) -> Style {
if selected {
self.selected()
} else {
Style::default().fg(self.commit_msg)
}
}
pub fn stash_msg(&self, selected: bool) -> Style {
if selected {
self.selected()
} else {
Style::default().fg(self.stash_msg)
}
}
pub fn help_key(&self) -> Style {
Style::default()
.fg(self.help_key)
.add_modifier(Modifier::BOLD)
}
pub fn help_desc(&self) -> Style {
Style::default().fg(self.help_desc)
}
}
fn split_ron_fields(input: &str) -> Vec<String> {
let mut fields = Vec::new();
let mut depth = 0;
let mut start = 0;
for (i, c) in input.char_indices() {
match c {
'(' | '{' | '[' => depth += 1,
')' | '}' | ']' => depth -= 1,
',' if depth == 0 => {
fields.push(input[start..i].to_string());
start = i + 1;
}
_ => {}
}
}
let remaining = input[start..].trim();
if !remaining.is_empty() {
fields.push(remaining.to_string());
}
fields
}
fn apply_field(theme: &mut Theme, key: &str, color: Color) {
match key {
"tab_active" => theme.tab_active = color,
"tab_inactive" => theme.tab_inactive = color,
"tab_bar_bg" => theme.tab_bar_bg = color,
"diff_add_fg" => theme.diff_add_fg = color,
"diff_add_bg" => theme.diff_add_bg = color,
"diff_delete_fg" => theme.diff_delete_fg = color,
"diff_delete_bg" => theme.diff_delete_bg = color,
"diff_context_bg" => theme.diff_context_bg = color,
"diff_header_fg" => theme.diff_header_fg = color,
"selection_bg" => theme.selection_bg = color,
"selection_fg" => theme.selection_fg = color,
"border" => theme.border = color,
"border_focused" => theme.border_focused = color,
"title_fg" => theme.title_fg = color,
"dim_text" => theme.dim_text = color,
"normal_bg" => theme.normal_bg = color,
"light_bg" => theme.light_bg = color,
"file_entry" => theme.file_entry = color,
"file_entry_staged" => theme.file_entry_staged = color,
"file_entry_modified" => theme.file_entry_modified = color,
"file_entry_untracked" => theme.file_entry_untracked = color,
"commit_hash" => theme.commit_hash = color,
"commit_msg" => theme.commit_msg = color,
"commit_author" => theme.commit_author = color,
"commit_date" => theme.commit_date = color,
"stash_msg" => theme.stash_msg = color,
"help_key" => theme.help_key = color,
"help_desc" => theme.help_desc = color,
"mode_indicator_bg" => theme.mode_indicator_bg = color,
"status_added" => theme.status_added = color,
"status_deleted" => theme.status_deleted = color,
"status_modified" => theme.status_modified = color,
"line_number_fg" => theme.line_number_fg = color,
_ => {}
}
}