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Merged
rfprod merged 1 commit into from
Oct 17, 2026
Merged

feat(ui): dark/light theme support with configurable color pairs #15

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9 changes: 6 additions & 3 deletions src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ int main(int argc, const char* argv[]) {
std::string prompt = "Hey! What's up!";
bool stream = false;
bool interactive = false;
bool dark_theme = true;

bool done = false;

Expand All @@ -22,10 +23,12 @@ int main(int argc, const char* argv[]) {
stream = arg.substr(9) == "true" ? true : false;
} else if (arg.starts_with("--interactive=") == true) {
interactive = arg.substr(14) == "true" ? true : false;
} else if (arg.starts_with("--dark_theme=") == true) {
dark_theme = arg.substr(13) == "true" ? true : false;
}
}

UserInterface ui = UserInterface();
UserInterface ui(dark_theme);
if (interactive == true) {
printf("\nInteractive mode debug info.\n");
printf("---\n");
Expand All @@ -37,7 +40,7 @@ int main(int argc, const char* argv[]) {
printf("---\n");

ui.run();
ui.print_args(model, prompt, stream, interactive);
ui.print_args(model, prompt, stream, interactive, dark_theme);

while (prompt.length() == 0) {
done = ui.next_prompt(&prompt);
Expand All @@ -47,7 +50,7 @@ int main(int argc, const char* argv[]) {
}
}
} else {
UserInterface::print_args_noninteractive(model, prompt, stream, interactive);
UserInterface::print_args_noninteractive(model, prompt, stream, interactive, dark_theme);

if (prompt.length() == 0) {
done = UserInterface::next_prompt_noninteractive(&prompt);
Expand Down
79 changes: 66 additions & 13 deletions src/user-interface.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,47 @@

UserInterface* UserInterface::instance = nullptr;

constexpr int COLOR_PAIR_DEFAULT = 1;
constexpr int COLOR_PAIR_INVERT = 2;
enum ColorPair {
DEFAULT_PAIR = 1,
HIGHLIGHT_PAIR = 2,
SUCCESS_PAIR = 3,
WARNING_PAIR = 4,
ERROR_PAIR = 5,
INFO_PAIR = 6,
MUTED_PAIR = 7,
ACCENT_PAIR = 8,
FOCUS_PAIR = 9
};

void UserInterface::init_dark_theme(void) {
start_color();
use_default_colors();

// Purpose | Foreground | Background
init_pair(DEFAULT_PAIR, COLOR_WHITE, -1);
init_pair(HIGHLIGHT_PAIR, COLOR_BLACK, COLOR_WHITE);
init_pair(SUCCESS_PAIR, COLOR_GREEN, -1);
init_pair(WARNING_PAIR, COLOR_YELLOW, -1);
init_pair(ERROR_PAIR, COLOR_RED, -1);
init_pair(INFO_PAIR, COLOR_CYAN, -1);
init_pair(ACCENT_PAIR, COLOR_MAGENTA, -1);
init_pair(FOCUS_PAIR, COLOR_WHITE, COLOR_BLUE);
}

void UserInterface::init_light_theme(void) {
start_color();
use_default_colors();

// Purpose | Foreground | Background
init_pair(DEFAULT_PAIR, COLOR_BLACK, COLOR_WHITE);
init_pair(HIGHLIGHT_PAIR, COLOR_WHITE, COLOR_BLACK);
init_pair(SUCCESS_PAIR, COLOR_GREEN, COLOR_WHITE);
init_pair(WARNING_PAIR, COLOR_YELLOW, COLOR_WHITE);
init_pair(ERROR_PAIR, COLOR_RED, COLOR_WHITE);
init_pair(INFO_PAIR, COLOR_BLUE, COLOR_WHITE);
init_pair(ACCENT_PAIR, COLOR_MAGENTA, COLOR_WHITE);
init_pair(FOCUS_PAIR, COLOR_BLACK, COLOR_CYAN);
}

void UserInterface::init_ncurses(void) {
// Set up locale for UTF-8 support.
Expand Down Expand Up @@ -53,10 +92,14 @@ void UserInterface::init_ncurses(void) {
}

if (has_colors()) {
start_color();
init_pair(COLOR_PAIR_DEFAULT, COLOR_WHITE, COLOR_BLACK);
init_pair(COLOR_PAIR_INVERT, COLOR_BLACK, COLOR_WHITE);
bkgd(COLOR_PAIR(COLOR_PAIR_DEFAULT));
printf("DEBUG: Checking theme - use_dark_theme = %s\n",
this->use_dark_theme ? "true" : "false");
if (this->use_dark_theme == true) {
this->init_dark_theme();
} else {
this->init_light_theme();
}
bkgd(COLOR_PAIR(DEFAULT_PAIR));
}

signal(SIGWINCH, UserInterface::handle_resize);
Expand Down Expand Up @@ -132,7 +175,15 @@ void UserInterface::draw_input_area() {
mvprintw(layout.input_y, layout.input_x + 37, "%s", input_buffer.c_str());
}

UserInterface::UserInterface() : resize_flag(0), running(0), input_cursor_x(0), layout({}) {
UserInterface::UserInterface()
: resize_flag(0), running(0), input_cursor_x(0), layout({}), use_dark_theme(true) {
printf("DEBUG: use_dark_theme = %s\n", this->use_dark_theme ? "true" : "false");
UserInterface::instance = this;
}

UserInterface::UserInterface(bool dark_theme)
: resize_flag(0), running(0), input_cursor_x(0), layout({}), use_dark_theme(dark_theme) {
printf("DEBUG: use_dark_theme = %s\n", this->use_dark_theme ? "true" : "false");
UserInterface::instance = this;
}

Expand Down Expand Up @@ -184,23 +235,25 @@ void UserInterface::end_session(int exit_code) {
}

void UserInterface::print_args(const std::string& model, const std::string& prompt, bool stream,
bool interactive) {
bool interactive, bool dark_theme) {
std::string buffer;
buffer += "🛈 model = " + model + "\n";
buffer += "🛈 prompt = " + prompt + "\n";
buffer += "🛈 stream = " + std::string(stream ? "true" : "false") + "\n";
buffer += "🛈 interactive = " + std::string(interactive ? "true" : "false") + "\n";
buffer += "🛈 dark_theme = " + std::string(dark_theme ? "true" : "false") + "\n";

this->print(buffer, UserInterface::MESSAGE_TYPE_NORMAL);
}

void UserInterface::print_args_noninteractive(const std::string& model, const std::string& prompt,
bool stream, bool interactive) {
bool stream, bool interactive, bool dark_theme) {
printf("\n");
printf("🛈 model = %s\n", model.c_str());
printf("🛈 prompt = %s\n", prompt.c_str());
printf("🛈 stream = %s\n", stream ? "true" : "false");
printf("🛈 interactive = %s\n", interactive ? "true" : "false");
printf("🛈 dark_theme = %s\n", dark_theme ? "true" : "false");
printf("\n");
}

Expand Down Expand Up @@ -325,9 +378,9 @@ void UserInterface::draw_output_area() {
break;

if (type == UserInterface::MESSAGE_TYPE_ERROR) {
wattron(stdscr, COLOR_PAIR(COLOR_PAIR_INVERT) | A_BOLD);
wattron(stdscr, COLOR_PAIR(ERROR_PAIR) | A_BOLD);
mvprintw(current_line, 2, "❌ %s", line_it->c_str());
wattroff(stdscr, COLOR_PAIR(COLOR_PAIR_INVERT) | A_BOLD);
wattroff(stdscr, COLOR_PAIR(ERROR_PAIR) | A_BOLD);
} else if (type == UserInterface::MESSAGE_TYPE_SUCCESS) {
wattron(stdscr, A_BOLD);
mvprintw(current_line, 2, "✅ %s", line_it->c_str());
Expand Down Expand Up @@ -435,7 +488,7 @@ void UserInterface::draw_spinner() {
int frame = this->spinner_frame.load();
int progress = this->progress_percent.load();

attron(COLOR_PAIR(COLOR_PAIR_DEFAULT));
attron(COLOR_PAIR(DEFAULT_PAIR));

if (progress > 0) {
mvprintw(this->layout.spinner_y, this->layout.spinner_x, "%c Progress: %d%%",
Expand All @@ -445,5 +498,5 @@ void UserInterface::draw_spinner() {
spinner_chars[frame]);
}

attroff(COLOR_PAIR(COLOR_PAIR_DEFAULT));
attroff(COLOR_PAIR(DEFAULT_PAIR));
}
26 changes: 24 additions & 2 deletions src/user-interface.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -55,8 +55,21 @@ class UserInterface {
std::atomic<int> spinner_frame{0};
std::atomic<int> progress_percent{0};

// Color theme configuration.
bool use_dark_theme = true;

// Initialization methods.

/**
* Initializes the color pairs for the UI dark theme.
*/
void init_dark_theme(void);

/**
* Initializes the color pairs for the UI light theme.
*/
void init_light_theme(void);

/**
* Initializes the ncurses library for terminal UI rendering.
* Sets up color pairs, configures terminal mode (raw mode, no echo),
Expand Down Expand Up @@ -146,6 +159,13 @@ class UserInterface {
* but does NOT start the render thread (that happens in run()).
*/
UserInterface();
/**
* Constructor: Initializes the UserInterface object.
* Sets up initial state, layout, and registers signal handlers
* but does NOT start the render thread (that happens in run()).
* @param dark_theme Whether to active the dark theme.
*/
explicit UserInterface(bool dark_theme);

/**
* Destructor: Cleans up resources.
Expand Down Expand Up @@ -197,19 +217,21 @@ class UserInterface {
* @param prompt The initial prompt text.
* @param stream Whether streaming is enabled.
* @param interactive Whether interactive mode is enabled.
* @param dark_theme Whether to active the dark theme.
*/
void print_args(const std::string& model, const std::string& prompt, bool stream,
bool interactive);
bool interactive, bool dark_theme);
/**
* Static version of print_args() for non-interactive mode.
* Outputs arguments to stdout instead of the UI.
* @param model The model being used.
* @param prompt The initial prompt text.
* @param stream Whether streaming is enabled.
* @param interactive Whether interactive mode is enabled.
* @param dark_theme Whether to active the dark theme.
*/
static void print_args_noninteractive(const std::string& model, const std::string& prompt,
bool stream, bool interactive);
bool stream, bool interactive, bool dark_theme);

/**
* Waits for and retrieves the next user input prompt (interactive mode).
Expand Down
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