166 lines
4.2 KiB
Rust
166 lines
4.2 KiB
Rust
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#[derive(Clone)]
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pub struct Color(pub f64, pub f64, pub f64);
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pub const COLOR_BLACK: Color = Color(0.0, 0.0, 0.0);
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pub const COLOR_WHITE: Color = Color(1.0, 1.0, 1.0);
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#[derive(Clone)]
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pub struct Attrs {
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pub italic: bool,
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pub bold: bool,
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pub foreground: Option<Color>,
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pub background: Option<Color>,
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}
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impl Attrs {
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pub fn new() -> Attrs {
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Attrs {
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foreground: None,
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background: None,
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italic: false,
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bold: false,
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}
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}
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fn clear(&mut self) {
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self.italic = false;
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self.bold = false;
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self.foreground = None;
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self.background = None;
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}
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}
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#[derive(Clone)]
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pub struct Cell {
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pub ch: char,
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pub attrs: Attrs,
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}
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impl Cell {
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pub fn new(ch: char) -> Cell {
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Cell {
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ch: ch,
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attrs: Attrs::new(),
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}
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}
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fn clear(&mut self) {
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self.ch = ' ';
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self.attrs.clear();
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}
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}
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pub struct UiModel {
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pub columns: usize,
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pub rows: usize,
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cur_row: usize,
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cur_col: usize,
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model: Vec<Vec<Cell>>,
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top: usize,
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bot: usize,
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left: usize,
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right: usize,
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}
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impl UiModel {
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pub fn empty() -> UiModel {
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UiModel::new(0, 0)
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}
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pub fn new(rows: u64, columns: u64) -> UiModel {
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let mut model = Vec::with_capacity(rows as usize);
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for i in 0..rows as usize {
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model.push(Vec::with_capacity(columns as usize));
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for _ in 0..columns as usize {
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model[i].push(Cell::new(' '));
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}
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}
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UiModel {
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columns: columns as usize,
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rows: rows as usize,
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cur_row: 0,
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cur_col: 0,
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model: model,
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top: 0,
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bot: 0,
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left: 0,
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right: 0,
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}
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}
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pub fn model(&self) -> &Vec<Vec<Cell>> {
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&self.model
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}
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pub fn set_cursor(&mut self, row: u64, col: u64) {
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self.cur_row = row as usize;
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self.cur_col = col as usize;
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}
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pub fn get_cursor(&self) -> (usize, usize) {
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(self.cur_row, self.cur_col)
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}
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pub fn put(&mut self, text: &str, attrs: &Option<Attrs>) {
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let mut cell = &mut self.model[self.cur_row][self.cur_col];
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cell.ch = text.chars().last().unwrap();
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cell.attrs = attrs.as_ref().map(|o| o.clone()).unwrap_or_else(|| Attrs::new());
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self.cur_col += 1;
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}
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pub fn set_scroll_region(&mut self, top: u64, bot: u64, left: u64, right: u64) {
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self.top = top as usize;
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self.bot = bot as usize;
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self.left = left as usize;
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self.right = right as usize;
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}
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fn copy_row(&mut self, row: usize, offset: i64, left: usize, right: usize) {
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for col in left..right + 1 {
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let from_row = (row as i64 + offset) as usize;
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let from_cell = self.model[from_row][col].clone();
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self.model[row][col] = from_cell;
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}
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}
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pub fn scroll(&mut self, count: i64) {
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let (top, bot, left, right) = (self.top as i64, self.bot as i64, self.left, self.right);
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if count > 0 {
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for row in top as usize..(bot - count + 1) as usize {
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self.copy_row(row, count, left, right);
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}
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} else {
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for row in ((top - count) as usize..(bot + 1) as usize).rev() {
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self.copy_row(row, count, left, right);
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}
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}
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if count > 0 {
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self.clear_region((bot - count + 1) as usize, bot as usize, left, right);
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} else {
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self.clear_region(top as usize, (top - count - 1) as usize, left, right);
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}
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}
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pub fn clear(&mut self) {
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let (rows, columns) = (self.rows, self.columns);
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self.clear_region(0, rows - 1, 0, columns - 1);
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}
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pub fn eol_clear(&mut self) {
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let (cur_row, cur_col, columns) = (self.cur_row, self.cur_col, self.columns);
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self.clear_region(cur_row, cur_row, cur_col, columns - 1);
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}
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fn clear_region(&mut self, top: usize, bot: usize, left: usize, right: usize) {
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for row in &mut self.model[top..bot + 1] {
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for cell in &mut row[left..right + 1] {
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cell.clear();
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}
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}
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}
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}
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