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use crate::state::GlobalState;
use super::{map::LuaMap, register::{Register, SheetId}};
use mlua::prelude::*;
pub struct SheetLuaRef {
id: SheetId,
}
impl SheetLuaRef {
pub fn new(id: SheetId) -> Self {
Self { id }
}
pub fn id(&self) -> SheetId {
self.id
}
}
impl LuaUserData for SheetLuaRef {
fn add_fields<'lua, F: mlua::UserDataFields<'lua, Self>>(fields: &mut F) {
fields.add_field_method_get("width", |_, luaref| {
Ok(Register::get(luaref.id).map(|s| s.width()))
});
fields.add_field_method_get("height", |_, luaref| {
Ok(Register::get(luaref.id).map(|s| s.height()))
});
}
fn add_methods<'lua, M: mlua::UserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_method_mut("cell", |lua, luaref, (row, column): (usize, usize)| {
if let Some(sheet) = Register::get(luaref.id) {
Ok(sheet.get_ref(row, column).into_lua(lua).unwrap())
} else {
Ok(LuaValue::Nil)
}
});
methods.add_method_mut("map", |_, luaref, func: LuaFunction| {
if let Some(sheet) = Register::get(luaref.id) {
let range: Vec<_> = {
let state = GlobalState::get();
let sheet = state.view.active_sheet().unwrap();
if sheet.id() != luaref.id() {
return Ok(());
}
let (width, height) = (sheet.width(), sheet.height());
if state.view.selection_anchor.is_some() {
state.view.selection()
} else {
let mut cells = Vec::new();
for row in 0..height {
for column in 0..width {
cells.push((row, column));
}
}
cells
}
};
sheet.lua_map(func, range)
} else {
Err(mlua::Error::runtime("unvalid sheet"))
}
})
}
}
impl<'lua> FromLua<'lua> for SheetLuaRef {
fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> {
if let Some(ud) = value.as_userdata() {
ud.take()
} else {
Err(LuaError::runtime("failed to parse sheet"))
}
}
}
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