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|
use unicode_width::UnicodeWidthStr;
use zellij_tile::prelude::*;
use crate::click::{ClickAction, ClickRegion};
use crate::fit::Fit;
use crate::frame::Frame;
use crate::screens::ActiveScreen;
const H_PAD: usize = 1;
const SEPARATOR_CHAR: char = '\u{2500}';
const ENTRIES: [HamburgerEntry; 5] = [
HamburgerEntry::Item(HamburgerItem::Fit),
HamburgerEntry::Item(HamburgerItem::ChangePane),
HamburgerEntry::Item(HamburgerItem::ChangeSession),
HamburgerEntry::Separator,
HamburgerEntry::Item(HamburgerItem::SwitchToDesktop),
];
#[derive(Default)]
pub struct MenuScreen {
pub open: bool,
}
impl MenuScreen {
pub fn toggle(&mut self, active: &mut ActiveScreen) -> bool {
if self.open {
self.open = false;
} else {
*active = ActiveScreen::Viewport;
self.open = true;
}
true
}
pub fn render(
&self,
fit: &Fit,
frame: &mut Frame,
row_start: usize,
row_end: usize,
cols: usize,
) {
let Some(layout) = MenuLayout::compute(&ENTRIES, cols) else {
return;
};
let max_visible = row_end.saturating_sub(row_start);
for (i, entry) in ENTRIES.iter().take(max_visible).enumerate() {
let row = row_start + i;
match entry {
HamburgerEntry::Item(item) => draw_item_row(frame, fit, item, &layout, row),
HamburgerEntry::Separator => draw_separator_row(&layout, row),
}
}
}
}
enum HamburgerItem {
Fit,
ChangePane,
ChangeSession,
SwitchToDesktop,
}
impl HamburgerItem {
fn label(&self) -> &'static str {
match self {
HamburgerItem::Fit => "Fit to Screen",
HamburgerItem::ChangePane => "Change Pane",
HamburgerItem::ChangeSession => "Change Session",
HamburgerItem::SwitchToDesktop => "Switch to Desktop",
}
}
fn action(&self) -> ClickAction {
match self {
HamburgerItem::Fit => ClickAction::ToggleFit,
HamburgerItem::ChangePane => ClickAction::ExpandPanes,
HamburgerItem::ChangeSession => ClickAction::ExpandSessions,
HamburgerItem::SwitchToDesktop => ClickAction::ExitMobileMode,
}
}
fn is_armed(&self, fit: &Fit) -> bool {
matches!(self, HamburgerItem::Fit) && fit.active
}
}
enum HamburgerEntry {
Item(HamburgerItem),
Separator,
}
impl HamburgerEntry {
fn label_width(&self) -> Option<usize> {
match self {
HamburgerEntry::Item(item) => Some(UnicodeWidthStr::width(item.label())),
HamburgerEntry::Separator => None,
}
}
}
struct MenuLayout {
menu_x: usize,
menu_w: usize,
label_max: usize,
}
impl MenuLayout {
fn compute(entries: &[HamburgerEntry], cols: usize) -> Option<Self> {
let label_max = entries
.iter()
.filter_map(HamburgerEntry::label_width)
.max()
.unwrap_or(0);
let menu_w = label_max + 2 * H_PAD;
if label_max == 0 || menu_w > cols {
return None;
}
Some(MenuLayout {
menu_x: cols - menu_w,
menu_w,
label_max,
})
}
fn padded_row(&self, content: &str, content_w: usize) -> String {
let pad = " ".repeat(H_PAD);
let trailing = " ".repeat(self.label_max.saturating_sub(content_w));
format!("{pad}{content}{trailing}{pad}")
}
}
fn draw_item_row(
frame: &mut Frame,
fit: &Fit,
item: &HamburgerItem,
layout: &MenuLayout,
row: usize,
) {
let label = item.label();
let text = layout.padded_row(label, UnicodeWidthStr::width(label));
let label_chars = H_PAD..H_PAD + label.chars().count();
let mut t = Text::new(&text).selected();
t = if item.is_armed(fit) {
t.success_color_range(label_chars)
} else {
t.color_range(3, label_chars)
};
print_text_with_coordinates(t, layout.menu_x, row, Some(layout.menu_w), None);
frame.click_regions.push(ClickRegion::tight(
row,
layout.menu_x,
layout.menu_x + layout.menu_w,
item.action(),
));
}
fn draw_separator_row(layout: &MenuLayout, row: usize) {
let rule: String = std::iter::repeat(SEPARATOR_CHAR)
.take(layout.label_max)
.collect();
let text = layout.padded_row(&rule, layout.label_max);
print_text_with_coordinates(
Text::new(&text).selected(),
layout.menu_x,
row,
Some(layout.menu_w),
None,
);
}
#[cfg(test)]
mod tests {
use super::*;
use crate::state::State;
#[test]
fn hamburger_menu_emits_four_click_regions_with_separator_above_exit() {
let mut state = State::default();
let cols = 40;
state.menu.render(&state.fit, &mut state.frame, 0, 20, cols);
assert_eq!(state.frame.click_regions.len(), 4);
let actions: Vec<ClickAction> = state
.frame
.click_regions
.iter()
.map(|r| r.action.clone())
.collect();
assert!(matches!(actions[0], ClickAction::ToggleFit));
assert!(matches!(actions[1], ClickAction::ExpandPanes));
assert!(matches!(actions[2], ClickAction::ExpandSessions));
assert!(matches!(actions[3], ClickAction::ExitMobileMode));
let rows: Vec<usize> = state
.frame
.click_regions
.iter()
.map(|r| r.row_start)
.collect();
assert_eq!(rows, vec![0, 1, 2, 4]);
let menu_x = state.frame.click_regions[0].col_start;
let menu_end = state.frame.click_regions[0].col_end;
for c in menu_x..menu_end {
assert_eq!(
state.frame.click_to_action(3, c),
None,
"separator row should be non-interactive at col {c}",
);
}
}
}
|
