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use std::sync::{Arc, RwLock};
use mlua::{IntoLua, UserData, Value};
use super::GlobalState;
use crate::{
cursor::{Cursor, CursorMove},
sheet::{
register::{Register, SheetId},
Sheet, SheetLuaRef,
},
};
#[derive(Default, Debug)]
pub struct SheetViewState {
pub cursor: Cursor,
active_sheet: Option<SheetId>,
}
impl SheetViewState {
pub const fn new() -> Self {
Self {
cursor: Cursor::new(),
active_sheet: None,
}
}
pub fn set_active_sheet(&mut self, sheet: Option<SheetId>) {
if let Some(id) = sheet {
if let Some(lock) = Register::get(id) {
let sheet = lock.read().unwrap();
self.cursor.set_x_max(sheet.width());
self.cursor.set_y_max(sheet.height());
}
}
self.active_sheet = sheet
}
pub fn active_sheet(&self) -> Option<Arc<RwLock<Sheet>>> {
if let Some(id) = self.active_sheet {
Register::get(id)
} else {
None
}
}
}
macro_rules! cfg {
() => {
GlobalState::instance().sheetview
};
}
macro_rules! cfg_mut {
() => {
GlobalState::instance_mut().sheetview
};
}
impl UserData for SheetViewState {
fn add_fields<'lua, F: mlua::prelude::LuaUserDataFields<'lua, Self>>(fields: &mut F) {
fields.add_field_function_get("active", |lua, _| {
if let Some(id) = cfg!().active_sheet {
SheetLuaRef::new(id).into_lua(lua)
} else {
Ok(Value::Nil)
}
});
fields.add_field_function_set("active", |_, _, sheet: Option<SheetLuaRef>| {
if let Some(r) = sheet {
cfg_mut!().active_sheet = Some(r.id())
} else {
cfg_mut!().active_sheet = None
}
Ok(())
});
fields.add_field_function_get("cursor", |lua, _| {
let table = lua.create_table()?;
table.set("row", cfg!().cursor.y())?;
table.set("column", cfg!().cursor.x())?;
Ok(table)
})
}
fn add_methods<'lua, M: mlua::prelude::LuaUserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_function("move_cursor", |_, (row, column): (usize, usize)| {
cfg_mut!()
.cursor
.move_checked(CursorMove::Jump((row, column)));
Ok(())
})
}
}
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