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use std::collections::BTreeMap;
use std::os::unix::io::RawFd;
use std::sync::mpsc::Receiver;
use crate::os_input_output::OsApi;
use crate::panes::PositionAndSize;
use crate::pty_bus::{PtyInstruction, VteEvent};
use crate::tab::Tab;
use crate::{errors::ErrorContext, wasm_vm::PluginInstruction};
use crate::{layout::Layout, panes::PaneId};
use crate::{AppInstruction, SenderWithContext};
/*
* Screen
*
* this holds multiple tabs, each one holding multiple panes
* it tracks the active tab and controls tab switching, all the rest
* is performed in Tab
*
*/
#[derive(Debug, Clone)]
pub enum ScreenInstruction {
Pty(RawFd, VteEvent),
Render,
NewPane(PaneId),
HorizontalSplit(PaneId),
VerticalSplit(PaneId),
WriteCharacter(Vec<u8>),
ResizeLeft,
ResizeRight,
ResizeDown,
ResizeUp,
MoveFocus,
MoveFocusLeft,
MoveFocusDown,
MoveFocusUp,
MoveFocusRight,
Quit,
ScrollUp,
ScrollDown,
ClearScroll,
CloseFocusedPane,
ToggleActiveTerminalFullscreen,
ClosePane(PaneId),
ApplyLayout((Layout, Vec<RawFd>)),
NewTab(RawFd),
SwitchTabNext,
SwitchTabPrev,
CloseTab,
}
pub struct Screen {
pub receiver: Receiver<(ScreenInstruction, ErrorContext)>,
max_panes: Option<usize>,
tabs: BTreeMap<usize, Tab>,
pub send_pty_instructions: SenderWithContext<PtyInstruction>,
pub send_plugin_instructions: SenderWithContext<PluginInstruction>,
pub send_app_instructions: SenderWithContext<AppInstruction>,
full_screen_ws: PositionAndSize,
active_tab_index: Option<usize>,
os_api: Box<dyn OsApi>,
}
impl Screen {
pub fn new(
receive_screen_instructions: Receiver<(ScreenInstruction, ErrorContext)>,
send_pty_instructions: SenderWithContext<PtyInstruction>,
send_plugin_instructions: SenderWithContext<PluginInstruction>,
send_app_instructions: SenderWithContext<AppInstruction>,
full_screen_ws: &PositionAndSize,
os_api: Box<dyn OsApi>,
max_panes: Option<usize>,
) -> Self {
Screen {
receiver: receive_screen_instructions,
max_panes,
send_pty_instructions,
send_plugin_instructions,
send_app_instructions,
full_screen_ws: *full_screen_ws,
active_tab_index: None,
tabs: BTreeMap::new(),
os_api,
}
}
pub fn new_tab(&mut self, pane_id: RawFd) {
let tab_index = self.get_next_tab_index();
let tab = Tab::new(
tab_index,
&self.full_screen_ws,
self.os_api.clone(),
self.send_pty_instructions.clone(),
self.send_plugin_instructions.clone(),
self.send_app_instructions.clone(),
self.max_panes,
Some(PaneId::Terminal(pane_id)),
);
self.active_tab_index = Some(tab_index);
self.tabs.insert(tab_index, tab);
self.render();
}
fn get_next_tab_index(&self) -> usize {
if let Some(index) = self.tabs.keys().last() {
*index + 1
} else {
0
}
}
pub fn switch_tab_next(&mut self) {
let active_tab_id = self.get_active_tab().unwrap().index;
let tab_ids: Vec<usize> = self.tabs.keys().copied().collect();
let first_tab = tab_ids.get(0).unwrap();
let active_tab_id_position = tab_ids.iter().position(|id| id == &active_tab_id).unwrap();
if let Some(next_tab) = tab_ids.get(active_tab_id_position + 1) {
self.active_tab_index = Some(*next_tab);
} else {
self.active_tab_index = Some(*first_tab);
}
self.render();
}
pub fn switch_tab_prev(&mut self) {
let active_tab_id = self.get_active_tab().unwrap().index;
let tab_ids: Vec<usize> = self.tabs.keys().copied().collect();
let first_tab = tab_ids.get(0).unwrap();
let last_tab = tab_ids.last().unwrap();
let active_tab_id_position = tab_ids.iter().position(|id| id == &active_tab_id).unwrap();
if active_tab_id == *first_tab {
self.active_tab_index = Some(*last_tab)
} else if let Some(prev_tab) = tab_ids.get(active_tab_id_position - 1) {
self.active_tab_index = Some(*prev_tab)
}
self.render();
}
pub fn close_tab(&mut self) {
let active_tab_index = self.active_tab_index.unwrap();
if self.tabs.len() > 1 {
self.switch_tab_prev();
}
let mut active_tab = self.tabs.remove(&active_tab_index).unwrap();
let pane_ids = active_tab.get_pane_ids();
self.send_pty_instructions
.send(PtyInstruction::CloseTab(pane_ids))
.unwrap();
if self.tabs.is_empty() {
self.active_tab_index = None;
self.render();
}
}
pub fn render(&mut self) {
if let Some(active_tab) = self.get_active_tab_mut() {
if active_tab.get_active_pane().is_some() {
active_tab.render();
} else {
self.close_tab();
}
} else {
self.send_app_instructions
.send(AppInstruction::Exit)
.unwrap();
};
}
pub fn get_active_tab(&self) -> Option<&Tab> {
match self.active_tab_index {
Some(tab) => self.tabs.get(&tab),
None => None,
}
}
pub fn get_tabs_mut(&mut self) -> &mut BTreeMap<usize, Tab> {
&mut self.tabs
}
pub fn get_active_tab_mut(&mut self) -> Option<&mut Tab> {
let tab = match self.active_tab_index {
Some(tab) => self.get_tabs_mut().get_mut(&tab),
None => None,
};
tab
}
pub fn apply_layout(&mut self, layout: Layout, new_pids: Vec<RawFd>) {
let tab_index = self.get_next_tab_index();
let mut tab = Tab::new(
tab_index,
&self.full_screen_ws,
self.os_api.clone(),
self.send_pty_instructions.clone(),
self.send_plugin_instructions.clone(),
self.send_app_instructions.clone(),
self.max_panes,
None,
);
tab.apply_layout(layout, new_pids);
self.active_tab_index = Some(tab_index);
self.tabs.insert(tab_index, tab);
}
}
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