762 lines
23 KiB
Rust
762 lines
23 KiB
Rust
use std::{
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cmp::{max, min},
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fmt::Display,
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fs,
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io::{Read, Write},
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path::PathBuf,
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};
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use evalexpr::*;
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use crate::app::logic::{
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cell::{CSV_DELIMITER, CellType},
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ctx,
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};
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#[cfg(test)]
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use crate::app::app::App;
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pub const LEN: usize = 1000;
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pub struct Grid {
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// a b c ...
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// 0
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// 1
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// 2
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// ...
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cells: Vec<Vec<Option<CellType>>>,
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/// (X, Y)
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selected_cell: (usize, usize),
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/// Have unsaved modifications been made?
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dirty: bool,
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}
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impl std::fmt::Debug for Grid {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("Grid").field("cells", &"Too many to print").finish()
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}
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}
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impl Grid {
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pub fn new() -> Self {
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let mut a = Vec::with_capacity(LEN);
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for _ in 0..LEN {
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let mut b = Vec::with_capacity(LEN);
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for _ in 0..LEN {
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b.push(None)
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}
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a.push(b)
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}
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Self {
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cells: a,
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selected_cell: (0, 0),
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dirty: false,
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}
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}
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pub fn new_from_file(path: impl Into<PathBuf>) -> std::io::Result<Self> {
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let mut grid = Self::new();
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let mut file = fs::OpenOptions::new().read(true).open(path.into())?;
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let mut buf = String::new();
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file.read_to_string(&mut buf)?;
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for (yi, line) in buf.lines().enumerate() {
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let cells = Self::parse_csv_line(line);
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for (xi, cell) in cells.into_iter().enumerate() {
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// This gets automatically duck-typed
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grid.set_cell_raw((xi, yi), cell);
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}
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}
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// force dirty back off, we just read the data so it's gtg
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grid.dirty = false;
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Ok(grid)
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}
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/// Save file to `path` as a csv. Path with have `csv` appended to it if it
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/// does not already have the extension.
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pub fn save_to(&mut self, path: impl Into<PathBuf>) -> std::io::Result<()> {
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let mut path = path.into();
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const CSV: &str = "csv";
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const CUSTOM_EXT: &str = "nscim";
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let resolve_values;
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match path.extension() {
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Some(ext) => match ext.to_str() {
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Some(CSV) => {
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resolve_values = true;
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}
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_ => {
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resolve_values = false;
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path.add_extension(CUSTOM_EXT);
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}
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},
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None => {
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resolve_values = false;
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path.add_extension(CUSTOM_EXT);
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}
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}
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let mut f = fs::OpenOptions::new().write(true).append(false).truncate(true).create(true).open(path)?;
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let (mx, my) = self.max();
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for y in 0..=my {
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for x in 0..=mx {
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let cell = &self.cells[x][y];
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let data = if let Some(cell) = cell {
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if let Ok(val) = self.evaluate(&cell.to_string())
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&& resolve_values
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{
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val.to_string()
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} else {
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cell.to_string_csv_escaped()
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}
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} else {
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CSV_DELIMITER.to_string()
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};
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write!(f, "{data}")?;
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}
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write!(f, "\n")?;
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}
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f.flush()?;
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self.dirty = false;
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Ok(())
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}
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pub fn needs_to_be_saved(&self) -> bool {
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self.dirty
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}
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fn parse_csv_line(line: &str) -> Vec<Option<String>> {
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let mut iter = line.as_bytes().iter().map(|f| *f as char).peekable();
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let mut cells = Vec::new();
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let mut token = Vec::new();
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let mut inside_quotes = false;
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let mut is_escaped = false;
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while let Some(c) = iter.next() {
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// we just finished
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if c == CSV_DELIMITER && !inside_quotes {
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if !token.is_empty() {
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cells.push(Some(token.iter().collect::<String>()));
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} else {
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cells.push(None);
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}
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token.clear();
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continue;
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}
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// start reading an escaped cell
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if c == '"' {
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if inside_quotes {
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// we might be escaping a quote
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if let Some(next) = iter.peek() {
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// check if the next cell is a quote, if it is, that's because it's being escaped by the current quote
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// only escape the next char if this char isn't escaped it's self
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if *next == '"' && !is_escaped {
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// don't save the escape char
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is_escaped = true;
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continue;
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} else if is_escaped {
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is_escaped = false;
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} else {
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// escaped cell over
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inside_quotes = false;
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continue;
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}
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} else {
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if is_escaped {
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is_escaped = false;
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} else {
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continue;
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}
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}
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} else {
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// not inside quotes, must be escaping another one
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if let Some(next) = iter.peek() {
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if *next == '"' && !is_escaped {
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// the current char is " and the next char is "
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// forget this one and mark to save the next
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is_escaped = true;
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continue;
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} else if is_escaped {
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is_escaped = false;
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} else {
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inside_quotes = true;
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continue;
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}
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} else {
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// not inside quotes, EOL
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if is_escaped {
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is_escaped = false;
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}
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}
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}
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}
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token.push(c)
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}
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if !token.is_empty() {
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cells.push(Some(token.iter().collect::<String>()));
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}
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cells
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}
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pub fn cursor(&self) -> (usize, usize) {
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self.selected_cell
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}
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pub fn mv_cursor_to(&mut self, x: usize, y: usize) {
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self.selected_cell = (x, y)
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}
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pub fn apply_momentum(&mut self, (x, y): (i32, i32)) {
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let (cx, cy) = self.cursor();
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assert_eq!(0i32.saturating_add(-1), -1);
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let x = (cx as i32).saturating_add(x);
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let y = (cy as i32).saturating_add(y);
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// make it positive
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let x = max(x, 0) as usize;
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let y = max(y, 0) as usize;
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// keep it in the grid
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let x = min(x, LEN - 1);
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let y = min(y, LEN - 1);
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self.mv_cursor_to(x, y);
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}
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/// Iterate over the entire grid and see where
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/// the farthest modified cell is.
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#[must_use]
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fn max(&self) -> (usize, usize) {
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let mut max_x = 0;
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let mut max_y = 0;
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for (xi, x) in self.cells.iter().enumerate() {
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for (yi, cell) in x.iter().enumerate() {
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if cell.is_some() {
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if yi > max_y {
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max_y = yi
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}
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if xi > max_x {
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max_x = xi
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}
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}
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}
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}
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(max_x, max_y)
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}
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#[must_use]
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pub fn max_y_at_x(&self, x: usize) -> usize {
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let mut max_y = 0;
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if let Some(col) = self.cells.get(x) {
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// we could do fancy things like .take_while(not null) but then
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// we would have to deal with empty cells and stuff, which sounds
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// boring. This will be fast "enough", considering the grid is
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// probably only like 1k cells
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for (yi, cell) in col.iter().enumerate() {
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if cell.is_some() {
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if yi > max_y {
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max_y = yi
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}
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}
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}
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}
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max_y
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}
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/// Only evaluates equations, such as `=10` or `=A1/C2`, not
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/// strings or numbers.
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pub fn evaluate(&self, mut eq: &str) -> Result<f64, String> {
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if eq.starts_with('=') {
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eq = &eq[1..];
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} else {
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// Should be evaluating an equation
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return Err(format!("\"{eq}\" is not an equation"));
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}
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let ctx = ctx::CallbackContext::new(&self);
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let prep_for_return = |v: Value| {
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if v.is_number() {
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if v.is_float() {
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let val = v.as_float().expect("Value lied about being a float");
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return Ok(val);
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} else if v.is_int() {
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let i = v.as_int().expect("Value lied about being an int");
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return Ok(i as f64);
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}
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}
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return Err("Result is NaN".to_string());
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};
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match eval_with_context(eq, &ctx) {
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Ok(e) => {
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return prep_for_return(e);
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}
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Err(e) => match e {
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EvalexprError::VariableIdentifierNotFound(var_not_found) => {
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return Err(format!("\"{var_not_found}\" is not a variable"));
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}
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EvalexprError::TypeError {
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expected: e,
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actual: a,
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} => {
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// IE: You put a string into a function that wants a float
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return Err(format!("Wanted {e:?}, got {a}"));
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}
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_ => return Err(e.to_string()),
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},
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}
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}
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/// Parse values in the format of A0, C10 ZZ99, etc, and
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/// turn them into an X,Y index.
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pub fn parse_to_idx(i: &str) -> Option<(usize, usize)> {
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let chars = i.chars().take_while(|c| c.is_alphabetic()).collect::<Vec<char>>();
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let nums = i.chars().skip(chars.len()).take_while(|c| c.is_numeric()).collect::<String>();
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// At least half the arguments are gone
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if chars.len() == 0 || nums.len() == 0 {
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return None;
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}
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// get the x index from the chars
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let x_idx = chars
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.iter()
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.enumerate()
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.map(|(idx, c)| (c.to_ascii_lowercase() as usize - 97) + (26 * idx))
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.fold(0, |a, b| a + b);
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// get the y index from the numbers
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if let Ok(y_idx) = nums.parse::<usize>() {
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return Some((x_idx, y_idx));
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} else {
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return None;
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}
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}
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/// Helper for tests
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#[cfg(test)]
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pub fn set_cell<T: Into<CellType>>(&mut self, cell_id: &str, val: T) {
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if let Some(loc) = Self::parse_to_idx(cell_id) {
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self.set_cell_raw(loc, Some(val));
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}
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}
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pub fn set_cell_raw<T: Into<CellType>>(&mut self, (x, y): (usize, usize), val: Option<T>) {
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// TODO check oob
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self.cells[x][y] = val.map(|v| v.into());
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self.dirty = true;
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}
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/// Get cells via text like:
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/// A6,
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/// F0,
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/// etc
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pub fn get_cell(&self, cell_id: &str) -> &Option<CellType> {
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if let Some((x, y)) = Self::parse_to_idx(cell_id) {
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return self.get_cell_raw(x, y);
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}
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&None
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}
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pub fn get_cell_raw(&self, x: usize, y: usize) -> &Option<CellType> {
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if x >= LEN || y >= LEN {
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return &None;
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}
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&self.cells[x][y]
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}
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pub fn num_to_char(idx: usize) -> String {
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/*
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A = 0
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AA = 26
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AAA = Not going to worry about it yet
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*/
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let mut word: [char; 2] = [' '; 2];
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if idx >= 26 {
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word[0] = ((idx / 26) + 65 - 1) as u8 as char;
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}
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word[1] = ((idx % 26) + 65) as u8 as char;
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word.iter().collect()
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}
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}
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impl Default for Grid {
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fn default() -> Self {
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Self::new()
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}
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}
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// Do cells hold strings?
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#[test]
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fn cell_strings() {
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let mut grid = Grid::new();
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assert!(&grid.cells[0][0].is_none());
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grid.set_cell("A0", "Hello".to_string());
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assert!(grid.get_cell("A0").is_some());
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assert_eq!(grid.get_cell("A0").as_ref().unwrap().to_string(), String::from("Hello"));
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}
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// Testing if A0 -> 0,0 and if 0,0 -> A0
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#[test]
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fn alphanumeric_indexing() {
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assert_eq!(Grid::parse_to_idx("A0"), Some((0, 0)));
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assert_eq!(Grid::parse_to_idx("AA0"), Some((26, 0)));
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assert_eq!(Grid::parse_to_idx("A1"), Some((0, 1)));
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assert_eq!(Grid::parse_to_idx("A10"), Some((0, 10)));
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assert_eq!(Grid::parse_to_idx("Aa10"), Some((26, 10)));
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assert_eq!(Grid::parse_to_idx("invalid"), None);
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assert_eq!(Grid::parse_to_idx("1"), None);
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assert_eq!(Grid::parse_to_idx("A"), None);
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assert_eq!(Grid::parse_to_idx(":"), None);
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assert_eq!(Grid::parse_to_idx("="), None);
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assert_eq!(Grid::num_to_char(0).trim(), "A");
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assert_eq!(Grid::num_to_char(25).trim(), "Z");
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assert_eq!(Grid::num_to_char(26), "AA");
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assert_eq!(Grid::num_to_char(51), "AZ");
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assert_eq!(Grid::num_to_char(701), "ZZ");
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// Larger than ZZ isn't implemented yet
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}
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#[test]
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fn valid_equations() {
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let mut grid = Grid::new();
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grid.set_cell("A0", 2.);
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grid.set_cell("B0", 1.);
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grid.set_cell("C0", "=A0+B0".to_string());
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// cell math
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let cell = grid.get_cell("C0").as_ref().expect("Just set it");
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let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
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assert_eq!(res, 3.);
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// divide floats
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grid.set_cell("D0", "=5./2.".to_string());
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let cell = grid.get_cell("D0").as_ref().expect("I just set this");
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let res = grid.evaluate(&cell.to_string()).expect("Should be ok");
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assert_eq!(res, 2.5);
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// Float / Int mix
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grid.set_cell("D0", "=5./2".to_string());
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let cell = grid.get_cell("D0").as_ref().expect("I just set this");
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let res = grid.evaluate(&cell.to_string()).expect("Should be ok");
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assert_eq!(res, 2.5);
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// divide "ints" (should become floats)
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grid.set_cell("D0", "=5/2".to_string());
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let cell = grid.get_cell("D0").as_ref().expect("I just set this");
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let res = grid.evaluate(&cell.to_string()).expect("Should be ok");
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assert_eq!(res, 2.5);
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// Non-equation that should still be valid
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grid.set_cell("D0", "=10".to_string());
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let cell = grid.get_cell("D0").as_ref().expect("I just set this");
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let res = grid.evaluate(&cell.to_string()).expect("Should be ok");
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assert_eq!(res, 10.);
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}
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// Cell = output of Cell = value of Cells.
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// Cell who's value depends on the output of another cell's equation.
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#[test]
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fn fn_of_fn() {
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let mut grid = Grid::new();
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grid.set_cell("A0", 2.);
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grid.set_cell("B0", 1.);
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grid.set_cell("C0", "=A0+B0".to_string());
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grid.set_cell("D0", "=C0*2".to_string());
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if let Some(cell) = grid.get_cell("D0") {
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let res = grid.evaluate(&cell.to_string());
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assert!(res.is_ok());
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assert_eq!(res.unwrap(), 6.);
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return;
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}
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panic!("Cell not found");
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}
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// Two cells that have a circular dependency to solve for a value
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#[test]
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fn circular_reference_cells() {
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let mut grid = Grid::new();
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grid.set_cell("A0", "=B0".to_string());
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grid.set_cell("B0", "=A0".to_string());
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if let Some(cell) = grid.get_cell("A0") {
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let res = grid.evaluate(&cell.to_string());
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assert!(res.is_err());
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return;
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}
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panic!("Cell not found");
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}
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#[test]
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fn invalid_equations() {
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let mut grid = Grid::new();
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// Test invalidly formatted equation
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grid.set_cell("A0", "=invalid".to_string());
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let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
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let res = grid.evaluate(&cell.to_string());
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assert!(res.is_err());
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// Test an "equation" that's just 1 number
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grid.set_cell("B0", "=10".to_string());
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let cell = grid.get_cell("B0").as_ref().expect("Just set the cell");
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let res = grid.evaluate(&cell.to_string());
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assert!(res.is_ok());
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assert!(res.is_ok_and(|v| v == 10.));
|
|
|
|
// Trailing comma in function call
|
|
grid.set_cell("A0", 5.);
|
|
grid.set_cell("A1", 10.);
|
|
grid.set_cell("B0", "=avg(A0,A1,)".to_string());
|
|
let cell = grid.get_cell("B0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert_eq!(res.unwrap(), 7.5);
|
|
}
|
|
|
|
#[test]
|
|
fn grid_max() {
|
|
let mut grid = Grid::new();
|
|
|
|
grid.set_cell("A0", 1.);
|
|
let (mx, my) = grid.max();
|
|
assert_eq!(mx, 0);
|
|
assert_eq!(my, 0);
|
|
|
|
grid.set_cell("B0", 1.);
|
|
let (mx, my) = grid.max();
|
|
assert_eq!(mx, 1);
|
|
assert_eq!(my, 0);
|
|
|
|
grid.set_cell("B5", 1.);
|
|
let (mx, my) = grid.max();
|
|
assert_eq!(mx, 1);
|
|
assert_eq!(my, 5);
|
|
}
|
|
|
|
#[test]
|
|
fn avg_function() {
|
|
let mut grid = Grid::new();
|
|
|
|
grid.set_cell("A0", "=avg(5)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 5.);
|
|
|
|
grid.set_cell("A0", "=avg(5,10)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 7.5);
|
|
|
|
grid.set_cell("A0", "=avg(5,10,15)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 10.);
|
|
|
|
grid.set_cell("A0", "=avg(foo)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
|
|
grid.set_cell("A0", "=avg(1, foo)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
|
|
grid.set_cell("A0", "=avg()".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn sum_function() {
|
|
let mut grid = Grid::new();
|
|
|
|
grid.set_cell("A0", "=sum(5)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 5.);
|
|
|
|
grid.set_cell("A0", "=sum(5,10)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 15.);
|
|
|
|
grid.set_cell("A0", "=sum(foo)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
|
|
grid.set_cell("A0", "=sum(1, foo)".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
|
|
grid.set_cell("A0", "=sum()".to_string());
|
|
let cell = grid.get_cell("A0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn xlookup_function() {
|
|
let mut grid = Grid::new();
|
|
|
|
grid.set_cell("A0", "Bobby".to_string());
|
|
grid.set_cell("A1", "Sarah".to_string());
|
|
grid.set_cell("C0", 31.);
|
|
grid.set_cell("C1", 41.);
|
|
grid.set_cell("B0", "=xlookup(A:A,\"Bobby\",C:C)".to_string());
|
|
let cell = grid.get_cell("B0").as_ref().expect("Just set the cell");
|
|
let res = grid.evaluate(&cell.to_string());
|
|
assert!(res.is_ok());
|
|
assert_eq!(res.unwrap(), 31.);
|
|
}
|
|
|
|
#[test]
|
|
fn parse_csv() {
|
|
//standard parsing
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,2,3"),
|
|
vec![Some("1".to_string()), Some("2".to_string()), Some("3".to_string())]
|
|
);
|
|
|
|
// comma in a cell
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,\",\",3"),
|
|
vec![Some("1".to_string()), Some(",".to_string()), Some("3".to_string())]
|
|
);
|
|
|
|
// quotes in a cell
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,she said \"\"wow\"\",3"),
|
|
vec![Some("1".to_string()), Some("she said \"wow\"".to_string()), Some("3".to_string())]
|
|
);
|
|
|
|
// quotes and comma in cell
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,\"she said \"\"hello, world\"\"\",3"),
|
|
vec![Some("1".to_string()), Some("she said \"hello, world\"".to_string()), Some("3".to_string())]
|
|
);
|
|
|
|
// ending with a quote
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,she said \"\"hello world\"\""),
|
|
vec![Some("1".to_string()), Some("she said \"hello world\"".to_string())]
|
|
);
|
|
|
|
// ending with a quote with a comma
|
|
assert_eq!(
|
|
Grid::parse_csv_line("1,\"she said \"\"hello, world\"\"\""),
|
|
vec![Some("1".to_string()), Some("she said \"hello, world\"".to_string())]
|
|
);
|
|
|
|
// starting with a quote
|
|
assert_eq!(
|
|
Grid::parse_csv_line("\"\"hello world\"\" is what she said,1"),
|
|
vec![Some("\"hello world\" is what she said".to_string()), Some("1".to_string())]
|
|
);
|
|
|
|
// starting with a quote with a comma
|
|
assert_eq!(
|
|
Grid::parse_csv_line("\"\"\"hello, world\"\" is what she said\",1"),
|
|
vec![Some("\"hello, world\" is what she said".to_string()), Some("1".to_string())]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn ranges() {
|
|
let mut grid = Grid::new();
|
|
|
|
grid.set_cell("A0", 2.);
|
|
grid.set_cell("A1", 1.);
|
|
grid.set_cell("B0", "=sum(A:A)".to_string());
|
|
|
|
// range with numbers
|
|
let cell = grid.get_cell("B0").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 3.);
|
|
|
|
// use range output as input for other function
|
|
grid.set_cell("B1", "=B0*2".to_string());
|
|
let cell = grid.get_cell("B1").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 6.);
|
|
|
|
// use equation outputs as range input
|
|
grid.set_cell("A2", "=C0+1".to_string());
|
|
grid.set_cell("C0", 5.);
|
|
|
|
let cell = grid.get_cell("A2").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 6.);
|
|
|
|
let cell = grid.get_cell("B0").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 9.);
|
|
|
|
// use function outputs as range input
|
|
grid.set_cell("B1", 2.);
|
|
grid.set_cell("C0", "=sum(B:B)".to_string());
|
|
grid.set_cell("A2", "null".to_string());
|
|
|
|
let cell = grid.get_cell("C0").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 5.);
|
|
|
|
// use range outputs as range input
|
|
grid.set_cell("D0", "=sum(C:C)".to_string());
|
|
grid.set_cell("C1", 1.);
|
|
|
|
let cell = grid.get_cell("D0").as_ref().expect("Just set it");
|
|
let res = grid.evaluate(&cell.to_string()).expect("Should evaluate.");
|
|
assert_eq!(res, 6.);
|
|
}
|
|
|
|
#[test]
|
|
fn recursive_ranges() {
|
|
// recursive ranges causes weird behavior
|
|
// todo!();
|
|
}
|
|
|
|
#[test]
|
|
fn cursor_fns() {
|
|
// surprisingly, this test was needed
|
|
let mut app = App::new();
|
|
let c = app.grid.cursor();
|
|
assert_eq!(c, (0, 0));
|
|
|
|
app.grid.mv_cursor_to(1, 0);
|
|
assert_eq!(app.grid.cursor(), (1, 0));
|
|
}
|