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use std::fmt::Display;
use mlua::{FromLua, IntoLua, UserData, Value};
use super::register::{Register, SheetId};
#[derive(Debug, Clone)]
pub enum Cell {
String(String),
Number(f64),
}
impl Cell {
pub fn new_empty() -> Self {
Cell::String("".to_string())
}
}
impl<'lua> IntoLua<'lua> for Cell {
fn into_lua(self, lua: &'lua mlua::Lua) -> mlua::Result<mlua::Value<'lua>> {
match self {
Cell::String(s) => s.into_lua(lua),
Cell::Number(n) => n.into_lua(lua),
}
}
}
impl<'lua> FromLua<'lua> for Cell {
fn from_lua(value: mlua::Value<'lua>, _: &'lua mlua::Lua) -> mlua::Result<Self> {
match value {
Value::Nil => Ok(Cell::new_empty()),
Value::Boolean(b) => Ok(Cell::String(b.to_string())),
Value::Integer(n) => Ok(Cell::Number(n as f64)),
Value::Number(n) => Ok(Cell::Number(n)),
Value::String(s) => Ok(Cell::String(s.to_str()?.to_string())),
_ => Err(mlua::Error::runtime(
"cell content must be number or string",
)),
}
}
}
impl Display for Cell {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Cell::String(s) => s.fmt(f),
Cell::Number(n) => n.fmt(f),
}
}
}
impl From<String> for Cell {
fn from(value: String) -> Self {
Cell::String(value.clone())
}
}
impl From<&str> for Cell {
fn from(value: &str) -> Self {
Cell::String(value.to_string())
}
}
macro_rules! cell_from_integer {
($($number:ty),+ $(,)?) => {
$(
impl From<$number> for Cell {
fn from(value: $number) -> Self {
Cell::Number(value as f64)
}
}
)*
};
}
#[rustfmt::skip]
cell_from_integer!(
i8, i16, i32, i64, i128, isize,
u8, u16, u32, u64, u128, usize,
f32, f64
);
#[derive(Debug, Clone)]
pub struct CellRef {
row: usize,
column: usize,
sheet_id: SheetId,
value: Cell,
}
impl CellRef {
/// # Safety
///
/// This function shall only be called by the Sheet instance itsself or
/// if it has been assured that the `SheetId` is valid.
pub unsafe fn new(sheet_id: SheetId, row: usize, column: usize, cell: Cell) -> Self {
Self {
sheet_id,
row,
column,
value: cell
}
}
pub fn fetch_new(sheet_id: SheetId, row: usize, column: usize) -> Option<Self> {
Register::get(sheet_id)
.map(|sheet| {
sheet.read().unwrap().get_cell(row, column).map(|cell| Self {
sheet_id,
row,
column,
value: cell.clone(),
})
})
.unwrap_or(None)
}
pub fn value(&self) -> Cell {
self.value.clone()
}
pub fn set_value(&mut self, cell: Cell) {
self.value = cell.clone();
Register::get(self.sheet_id)
.unwrap()
.write()
.unwrap()
.set_cell(self.row, self.column, cell);
}
pub fn left(&self) -> Option<Self> {
if self.column > 0 {
Self::fetch_new(self.sheet_id, self.row, self.column - 1)
} else {
None
}
}
pub fn right(&self) -> Option<Self> {
Self::fetch_new(self.sheet_id, self.row, self.column + 1)
}
pub fn up(&self) -> Option<Self> {
if self.row > 0 {
Self::fetch_new(self.sheet_id, self.row - 1, self.column)
} else {
None
}
}
pub fn down(&self) -> Option<Self> {
Self::fetch_new(self.sheet_id, self.row + 1, self.column)
}
pub fn begin(&self) -> Option<Self> {
Self::fetch_new(self.sheet_id, self.row, 0)
}
pub fn end(&self) -> Option<Self> {
Self::fetch_new(
self.sheet_id,
self.row,
Register::get(self.sheet_id)
.unwrap()
.read()
.unwrap()
.width()
- 1,
)
}
pub fn top(&self) -> Option<Self> {
Self::fetch_new(self.sheet_id, 0, self.column)
}
pub fn bottom(&self) -> Option<Self> {
Self::fetch_new(
self.sheet_id,
Register::get(self.sheet_id)
.unwrap()
.read()
.unwrap()
.height()
- 1,
self.column,
)
}
}
impl UserData for CellRef
where
Self: Sized,
{
fn add_fields<'lua, F: mlua::UserDataFields<'lua, Self>>(fields: &mut F) {
fields.add_field_method_get("row", |_, this| Ok(this.row));
fields.add_field_method_get("column", |_, this| Ok(this.column));
fields.add_field_method_get("value", |_, this| Ok(this.value()));
fields.add_field_method_get("left", |lua, this| this.left().into_lua(lua));
fields.add_field_method_get("right", |lua, this| this.right().into_lua(lua));
fields.add_field_method_get("up", |lua, this| this.up().into_lua(lua));
fields.add_field_method_get("down", |lua, this| this.down().into_lua(lua));
fields.add_field_method_get("begin", |lua, this| this.begin().into_lua(lua));
fields.add_field_method_get("end", |lua, this| this.end().into_lua(lua));
fields.add_field_method_get("top", |lua, this| this.top().into_lua(lua));
fields.add_field_method_get("bottom", |lua, this| this.bottom().into_lua(lua));
}
}
|
