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|
use std::sync::{Arc, RwLock};
use mlua::{IntoLua, UserData, Value};
use self::{bar::SheetViewBarState, mode::Mode};
use super::{GlobalState, DUMMY_STATE};
use crate::{
cursor::{Cursor, CursorMove},
sheet::{
luaref::SheetLuaRef,
register::{Register, SheetId},
Sheet,
},
};
pub mod bar;
pub mod mode;
#[derive(Default, Debug)]
pub struct SheetViewState {
pub cursor: Cursor,
active_sheet: Option<SheetId>,
pub mode: Mode,
pub selection_anchor: Option<(usize, usize)>,
pub bar: SheetViewBarState,
}
impl SheetViewState {
pub const fn new() -> Self {
Self {
cursor: Cursor::new(),
active_sheet: None,
mode: Mode::Normal,
selection_anchor: None,
bar: SheetViewBarState::new(),
}
}
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() - 1);
self.cursor.set_y_max(sheet.height() - 1);
}
}
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
}
}
pub fn cancel_mode(&mut self) {
if self.selection_anchor.is_some() {
self.mode = Mode::Visual;
} else {
self.mode = Mode::Normal;
}
}
fn selection_range(&self) -> Option<((usize, usize), (usize, usize))> {
if let Some(selection) = self.selection_anchor {
let row = if selection.0 > self.cursor.y() {
(self.cursor.y(), selection.0)
} else {
(selection.0, self.cursor.y())
};
let column = if selection.1 > self.cursor.x() {
(self.cursor.x(), selection.1)
} else {
(selection.1, self.cursor.x())
};
Some((row, column))
} else {
None
}
}
pub fn selection(&self) -> Vec<(usize, usize)> {
let mut selection = Vec::new();
if let Some((row, column)) = self.selection_range() {
for i in row.0..=row.1 {
for j in column.0..=column.1 {
selection.push((i, j))
}
}
}
selection
}
pub fn selection_or_cursor(&self) -> Vec<(usize, usize)> {
if self.selection_anchor.is_some() {
self.selection()
} else {
vec![(self.cursor.y(), self.cursor.x())]
}
}
pub fn selection_contains(&self, row: usize, column: usize) -> bool {
if let Some((row_range, column_range)) = self.selection_range() {
row >= row_range.0
&& row <= row_range.1
&& column >= column_range.0
&& column <= column_range.1
} else {
false
}
}
}
macro_rules! cfg {
() => {
GlobalState::instance().view
};
}
macro_rules! cfg_mut {
() => {
GlobalState::instance_mut().view
};
}
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)
});
fields.add_field_function_get("mode", |_, _| Ok(cfg!().mode));
fields.add_field_function_set("mode", |_, _, mode: Mode| {
let this = &mut cfg_mut!();
match mode {
Mode::Visual => match this.mode {
Mode::Visual => {}
_ => this.selection_anchor = Some((this.cursor.y(), this.cursor.x())),
},
_ => this.selection_anchor = None,
}
this.mode = mode;
Ok(())
});
fields.add_field_function_get("bar", |_, _| Ok(DUMMY_STATE.view.bar))
}
fn add_methods<'lua, M: mlua::prelude::LuaUserDataMethods<'lua, Self>>(methods: &mut M) {
methods.add_function("move_cursor", |_, m: CursorMove| {
cfg_mut!().cursor.move_checked(m);
Ok(())
});
methods.add_function("cancel_mode", |_, _: ()| {
cfg_mut!().cancel_mode();
Ok(())
})
}
}
|
