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|
use zellij_tile::prelude::*;
// Constants for text content
const TOKEN_LABEL_LONG: &str = "New log-in token: ";
const TOKEN_LABEL_SHORT: &str = "Token: ";
const EXPLANATION_1_LONG: &str = "Use this token to log-in from the browser.";
const EXPLANATION_1_SHORT: &str = "Use to log-in from the browser.";
const EXPLANATION_2_LONG: &str =
"Copy this token, because it will not be saved and can't be retrieved.";
const EXPLANATION_2_SHORT: &str = "It will not be saved and can't be retrieved.";
const EXPLANATION_3_LONG: &str = "If lost, it can always be revoked and a new one generated.";
const EXPLANATION_3_SHORT: &str = "It can always be revoked and a regenerated.";
const ESC_INSTRUCTION: &str = "<Esc> - go back";
// Screen layout constants
const SCREEN_HEIGHT: usize = 7;
const TOKEN_Y_OFFSET: usize = 0;
const EXPLANATION_1_Y_OFFSET: usize = 2;
const EXPLANATION_2_Y_OFFSET: usize = 4;
const EXPLANATION_3_Y_OFFSET: usize = 5;
const ESC_Y_OFFSET: usize = 7;
const ERROR_Y_OFFSET: usize = 8;
struct TextVariant {
long: &'static str,
short: &'static str,
}
impl TextVariant {
fn select(&self, cols: usize) -> &'static str {
if cols >= self.long.chars().count() {
self.long
} else {
self.short
}
}
}
pub struct TokenScreen {
token: String,
web_server_error: Option<String>,
rows: usize,
cols: usize,
}
impl TokenScreen {
pub fn new(token: String, web_server_error: Option<String>, rows: usize, cols: usize) -> Self {
Self {
token,
web_server_error,
rows,
cols,
}
}
pub fn render(&self) {
let elements = self.prepare_screen_elements();
let width = self.calculate_max_width(&elements);
let (base_x, base_y) = self.calculate_base_position(width);
self.render_elements(&elements, base_x, base_y);
self.render_error_if_present(base_x, base_y);
}
fn prepare_screen_elements(&self) -> ScreenElements {
let token_variant = TextVariant {
long: TOKEN_LABEL_LONG,
short: TOKEN_LABEL_SHORT,
};
let explanation_variants = [
TextVariant {
long: EXPLANATION_1_LONG,
short: EXPLANATION_1_SHORT,
},
TextVariant {
long: EXPLANATION_2_LONG,
short: EXPLANATION_2_SHORT,
},
TextVariant {
long: EXPLANATION_3_LONG,
short: EXPLANATION_3_SHORT,
},
];
let token_label = token_variant.select(
self.cols
.saturating_sub(self.token.chars().count().saturating_sub(1)),
);
let token_text = format!("{}{}", token_label, self.token);
let token_element = self.create_token_text_element(&token_text, token_label);
let explanation_texts: Vec<&str> = explanation_variants
.iter()
.map(|variant| variant.select(self.cols))
.collect();
let explanation_elements: Vec<Text> = explanation_texts
.iter()
.enumerate()
.map(|(i, &text)| {
if i == 0 {
Text::new(text).color_range(0, ..)
} else {
Text::new(text)
}
})
.collect();
let esc_element = Text::new(ESC_INSTRUCTION).color_range(3, ..=4);
ScreenElements {
token: token_element,
token_text,
explanation_texts,
explanations: explanation_elements,
esc: esc_element,
}
}
fn create_token_text_element(&self, token_text: &str, token_label: &str) -> Text {
Text::new(token_text).color_range(2, ..token_label.chars().count())
}
fn calculate_max_width(&self, elements: &ScreenElements) -> usize {
let token_width = elements.token_text.chars().count();
let explanation_widths = elements
.explanation_texts
.iter()
.map(|text| text.chars().count());
let esc_width = ESC_INSTRUCTION.chars().count();
[token_width, esc_width]
.into_iter()
.chain(explanation_widths)
.max()
.unwrap_or(0)
}
fn calculate_base_position(&self, width: usize) -> (usize, usize) {
let base_x = self.cols.saturating_sub(width) / 2;
let base_y = self.rows.saturating_sub(SCREEN_HEIGHT) / 2;
(base_x, base_y)
}
fn render_elements(&self, elements: &ScreenElements, base_x: usize, base_y: usize) {
print_text_with_coordinates(
elements.token.clone(),
base_x,
base_y + TOKEN_Y_OFFSET,
None,
None,
);
let y_offsets = [
EXPLANATION_1_Y_OFFSET,
EXPLANATION_2_Y_OFFSET,
EXPLANATION_3_Y_OFFSET,
];
for (explanation, &y_offset) in elements.explanations.iter().zip(y_offsets.iter()) {
print_text_with_coordinates(explanation.clone(), base_x, base_y + y_offset, None, None);
}
print_text_with_coordinates(
elements.esc.clone(),
base_x,
base_y + ESC_Y_OFFSET,
None,
None,
);
}
fn render_error_if_present(&self, base_x: usize, base_y: usize) {
if let Some(error) = &self.web_server_error {
print_text_with_coordinates(
Text::new(error).color_range(3, ..),
base_x,
base_y + ERROR_Y_OFFSET,
None,
None,
);
}
}
}
struct ScreenElements {
token: Text,
token_text: String,
explanation_texts: Vec<&'static str>,
explanations: Vec<Text>,
esc: Text,
}
|
