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use crate::constants::{
MINIMUM_COMPACT_WINDOW_WIDTH,
MINIMUM_WINDOW_HEIGHT,
TITLE,
TITLE_HELP_INDICATOR_LENGTH,
TITLE_LENGTH,
TITLE_SHORT,
TITLE_SHORT_LENGTH,
};
use crate::scroll::get_scroll_position;
use crate::view::ViewLine;
use crate::window::Window;
use crate::window::WindowColor;
use crate::Config;
pub struct View<'v> {
config: &'v Config,
window: &'v Window<'v>,
}
impl<'v> View<'v> {
pub fn new(window: &'v Window, config: &'v Config) -> Self {
Self { window, config }
}
pub fn draw_str(&self, s: &str) {
self.window.draw_str(s);
}
pub fn set_color(&self, color: WindowColor) {
self.window.color(color);
}
pub fn set_style(&self, dim: bool, underline: bool, reverse: bool) {
self.window.set_style(dim, underline, reverse);
}
pub fn check_window_size(&self) -> bool {
let (window_width, window_height) = self.get_view_size();
!(window_width <= MINIMUM_COMPACT_WINDOW_WIDTH || window_height <= MINIMUM_WINDOW_HEIGHT)
}
pub fn draw_error(&self, message: &str) {
self.draw_title(false);
self.window.color(WindowColor::Foreground);
self.window.set_style(false, false, false);
self.window.draw_str(message);
self.window.draw_str("\n");
self.window.color(WindowColor::IndicatorColor);
self.window.draw_str("Press any key to continue");
}
pub fn clear(&self) {
self.window.clear();
}
pub fn get_view_size(&self) -> (usize, usize) {
let (view_width, view_height) = self.window.get_window_size();
(view_width as usize, view_height as usize)
}
pub fn refresh(&self) {
self.window.refresh();
}
pub fn draw_view_lines(&self, lines: Vec<ViewLine>, top: usize, height: usize) {
let number_of_lines = lines.len();
let scroll_indicator_index = get_scroll_position(top, number_of_lines, height);
let show_scroll_bar = height < number_of_lines;
let mut index: usize = 0;
for line in lines.iter().skip(top).take(height) {
self.draw_view_line(line, show_scroll_bar);
if show_scroll_bar {
self.window.color(WindowColor::Foreground);
self.window.set_style(scroll_indicator_index != index, false, true);
self.window.draw_str(" ");
}
index += 1;
}
if height > lines.len() {
self.draw_vertical_spacer((height - index) as i32);
}
}
pub fn draw_view_line(&self, line: &ViewLine, scrollbar: bool) {
let (window_width, _) = self.window.get_window_size();
let window_width = if scrollbar { window_width - 1 } else { window_width } as usize;
let mut start = 0;
for segment in line.get_segments() {
start += segment.draw(window_width - start, &self.window);
if start >= window_width {
break;
}
}
if start < window_width {
let padding = " ".repeat(window_width - start);
self.window.draw_str(padding.as_str());
}
}
pub fn draw_title(&self, show_help: bool) {
self.window.color(WindowColor::Foreground);
self.window.set_style(false, true, true);
let (window_width, _) = self.window.get_window_size();
if window_width >= TITLE_LENGTH {
self.window.draw_str(TITLE);
// only draw help if there is room
if window_width > TITLE_LENGTH + TITLE_HELP_INDICATOR_LENGTH {
if (window_width - TITLE_LENGTH - TITLE_HELP_INDICATOR_LENGTH) > 0 {
let padding = " ".repeat((window_width - TITLE_LENGTH - TITLE_HELP_INDICATOR_LENGTH) as usize);
self.window.draw_str(padding.as_str());
}
if show_help {
self.window
.draw_str(format!("Help: {}", self.config.input_help).as_str());
}
else {
let padding = " ".repeat(TITLE_HELP_INDICATOR_LENGTH as usize);
self.window.draw_str(padding.as_str());
}
}
else if (window_width - TITLE_LENGTH) > 0 {
let padding = " ".repeat((window_width - TITLE_LENGTH) as usize);
self.window.draw_str(padding.as_str());
}
}
else {
self.window.draw_str(TITLE_SHORT);
if (window_width - TITLE_SHORT_LENGTH) > 0 {
let padding = " ".repeat((window_width - TITLE_SHORT_LENGTH) as usize);
self.window.draw_str(padding.as_str());
}
}
}
fn draw_vertical_spacer(&self, repeat: i32) {
self.window.color(WindowColor::Foreground);
self.window.set_style(false, false, false);
for _x in 0..repeat {
self.window.draw_vertical_space_character();
}
}
pub fn draw_prompt(&self, message: &str) {
self.draw_title(false);
self.window.set_style(false, false, false);
self.window.draw_str(&format!("\n{} ", message));
}
pub fn draw_confirm(&self, message: &str) {
self.draw_prompt(&format!(
"{} ({}/{})? ",
message, self.config.input_confirm_yes, self.config.input_confirm_no
));
}
}
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