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use termion::event::Key;
use crate::widget::{Widget, WidgetCore};
use crate::fail::{HResult, HError, ErrorLog};
use crate::coordinates::Coordinates;
pub trait Tabbable {
fn new_tab(&mut self) -> HResult<()>;
fn close_tab(&mut self) -> HResult<()>;
fn next_tab(&mut self) -> HResult<()>;
fn prev_tab(&mut self) -> HResult<()>;
fn goto_tab(&mut self, index: usize) -> HResult<()>;
fn on_tab_switch(&mut self) -> HResult<()> {
Ok(())
}
fn get_tab_names(&self) -> Vec<Option<String>>;
fn active_tab(&self) -> &dyn Widget;
fn active_tab_mut(&mut self) -> &mut dyn Widget;
fn on_key_sub(&mut self, key: Key) -> HResult<()>;
fn on_key(&mut self, key: Key) -> HResult<()> {
self.on_key_sub(key)
}
fn on_refresh(&mut self) -> HResult<()> { Ok(()) }
fn on_config_loaded(&mut self) -> HResult<()> { Ok(()) }
fn on_new(&mut self) -> HResult<()> { Ok(()) }
}
#[derive(PartialEq)]
pub struct TabView<T> where T: Widget, TabView<T>: Tabbable {
pub widgets: Vec<T>,
pub active: usize,
pub core: WidgetCore
}
impl<T> TabView<T> where T: Widget, TabView<T>: Tabbable {
pub fn new(core: &WidgetCore) -> TabView<T> {
let mut tabview = TabView {
widgets: vec![],
active: 0,
core: core.clone()
};
Tabbable::on_new(&mut tabview).log();
tabview
}
pub fn push_widget(&mut self, widget: T) -> HResult<()> {
self.widgets.push(widget);
Ok(())
}
pub fn pop_widget(&mut self) -> HResult<T> {
let widget = self.widgets.pop()?;
if self.widgets.len() <= self.active {
self.active -= 1;
}
Ok(widget)
}
pub fn remove_widget(&mut self, index: usize) -> HResult<()> {
let len = self.widgets.len();
if len > 1 {
self.widgets.remove(index);
if index+1 == len {
self.active -= 1;
}
}
Ok(())
}
pub fn goto_tab_(&mut self, index: usize) -> HResult<()> {
if index < self.widgets.len() {
self.active = index;
self.on_tab_switch().log();
}
Ok(())
}
pub fn active_tab_(&self) -> &T {
&self.widgets[self.active]
}
pub fn active_tab_mut_(&mut self) -> &mut T {
&mut self.widgets[self.active]
}
pub fn close_tab_(&mut self) -> HResult<()> {
self.remove_widget(self.active).log();
Ok(())
}
pub fn next_tab_(&mut self) {
if self.active + 1 == self.widgets.len() {
self.active = 0;
} else {
self.active += 1
}
self.on_tab_switch().log();
}
pub fn prev_tab_(&mut self) {
if self.active == 0 {
self.active = self.widgets.len() - 1;
} else {
self.active -= 1;
}
self.on_tab_switch().log();
}
}
impl<T> Widget for TabView<T> where T: Widget, TabView<T>: Tabbable {
fn get_core(&self) -> HResult<&WidgetCore> {
Ok(&self.core)
}
fn get_core_mut(&mut self) -> HResult<&mut WidgetCore> {
Ok(&mut self.core)
}
fn config_loaded(&mut self) -> HResult<()> {
self.on_config_loaded()
}
fn set_coordinates(&mut self, coordinates: &Coordinates) -> HResult<()> {
self.core.coordinates = coordinates.clone();
for widget in &mut self.widgets {
widget.set_coordinates(coordinates).log();
}
Ok(())
}
fn render_header(&self) -> HResult<String> {
let xsize = self.get_coordinates()?.xsize();
let header = self.active_tab_().render_header()?;
let tab_names = self.get_tab_names();
let mut nums_length = 0;
let tabnums = (0..self.widgets.len()).map(|num| {
nums_length += format!("{}:{} ",
num,
tab_names[num].as_ref().unwrap()).len();
if num == self.active {
format!(" {}{}:{}{}{}",
crate::term::invert(),
num,
tab_names[num].as_ref().unwrap(),
crate::term::reset(),
crate::term::header_color())
} else {
format!(" {}:{}", num, tab_names[num].as_ref().unwrap())
}
}).collect::<String>();
let nums_pos = xsize.saturating_sub(nums_length as u16);
Ok(format!("{}{}{}{}",
header,
crate::term::header_color(),
crate::term::goto_xy(nums_pos, 1),
tabnums))
}
fn render_footer(&self) -> HResult<String>
{
self.active_tab_().render_footer()
}
fn refresh(&mut self) -> HResult<()> {
Tabbable::on_refresh(self).log();
self.active_tab_mut().refresh()
}
fn get_drawlist(&self) -> HResult<String> {
self.active_tab_().get_drawlist()
}
fn on_key(&mut self, key: Key) -> HResult<()> {
match self.do_key(key) {
Err(HError::WidgetUndefinedKeyError{..}) => Tabbable::on_key(self, key)?,
e @ _ => e?
}
Ok(())
}
}
use crate::keybind::*;
impl<T: Widget> Acting for TabView<T> where TabView<T>: Tabbable {
type Action = TabAction;
fn search_in(&self) -> Bindings<Self::Action> {
self.core.config().keybinds.tab
}
fn do_action(&mut self, action: &Self::Action) -> HResult<()> {
use TabAction::*;
match action {
GotoTab(n) => self.goto_tab(*n)?,
NewTab => self.new_tab()?,
CloseTab => self.close_tab()?,
NextTab => self.next_tab()?,
PrevTab => self.prev_tab()?,
}
Ok(())
}
}
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