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| Original file line number | Diff line number | Diff line change |
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@@ -3,6 +3,7 @@ | |
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| mod infra; | ||
| mod language; | ||
| mod pretty_doc; | ||
| mod style; | ||
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| fn main() { | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| use crate::infra::SynlessBug; | ||
| use crate::language::{Ast, AstId, DocStorage, Location}; | ||
| use crate::style::{Condition, CursorHalf, Style, StyleLabel, ValidNotation}; | ||
| use partial_pretty_printer as ppp; | ||
| use std::fmt; | ||
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| // TODO: handle text char highlighting | ||
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| #[derive(Clone, Copy)] | ||
| pub struct DocRef<'d> { | ||
| storage: &'d DocStorage, | ||
| cursor_pos: Location, | ||
| left_cursor: Option<Ast>, | ||
| right_cursor: Option<Ast>, | ||
| ast: Ast, | ||
| } | ||
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| impl<'d> DocRef<'d> { | ||
| pub fn new(storage: &'d DocStorage, cursor_pos: Location, ast: Ast) -> DocRef<'d> { | ||
| let (left_cursor, right_cursor) = cursor_pos.cursor_halves(storage); | ||
| DocRef { | ||
| storage, | ||
| cursor_pos, | ||
| left_cursor, | ||
| right_cursor, | ||
| ast, | ||
| } | ||
| } | ||
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| fn with_ast(self, ast: Ast) -> Self { | ||
| DocRef { | ||
| storage: self.storage, | ||
| cursor_pos: self.cursor_pos, | ||
| left_cursor: self.left_cursor, | ||
| right_cursor: self.right_cursor, | ||
| ast, | ||
| } | ||
| } | ||
| } | ||
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| impl<'d> ppp::PrettyDoc<'d> for DocRef<'d> { | ||
| type Id = AstId; | ||
| type Style = Style; | ||
| type StyleLabel = StyleLabel; | ||
| type Condition = Condition; | ||
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| fn id(self) -> AstId { | ||
| self.ast.id(self.storage) | ||
| } | ||
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| fn notation(self) -> &'d ValidNotation { | ||
| self.ast.notation(self.storage) | ||
| } | ||
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| fn condition(self, condition: &Condition) -> bool { | ||
| match condition { | ||
| Condition::IsEmptyText => self | ||
| .ast | ||
| .text(self.storage) | ||
| .map(|text| text.as_str().is_empty()) | ||
| .unwrap_or(false), | ||
| Condition::IsCommentOrWs => self.ast.is_comment_or_ws(self.storage), | ||
| Condition::NeedsSeparator => { | ||
| if self.ast.is_comment_or_ws(self.storage) { | ||
| return false; | ||
| } | ||
| let mut sibling = self.ast; | ||
| while let Some(next_sibling) = sibling.next_sibling(self.storage) { | ||
| if !next_sibling.is_comment_or_ws(self.storage) { | ||
| return true; | ||
| } | ||
| sibling = next_sibling; | ||
| } | ||
| false | ||
| } | ||
| } | ||
| } | ||
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| fn lookup_style(self, style_label: StyleLabel) -> Style { | ||
| match style_label { | ||
| StyleLabel::Open => { | ||
| let mut style = Style::default(); | ||
| if self.cursor_pos == Location::BeforeFirstChild(self.ast) { | ||
| style.cursor = Some(CursorHalf::Left) | ||
| } | ||
| style | ||
| } | ||
| StyleLabel::Close => { | ||
| let mut style = Style::default(); | ||
| let at_end = match self.cursor_pos { | ||
| Location::InText(..) => todo!(), | ||
| Location::BeforeFirstChild(parent) => { | ||
| parent == self.ast && self.ast.first_child(self.storage).is_none() | ||
| } | ||
| Location::After(sibling) => self.ast.last_child(self.storage) == Some(sibling), | ||
| }; | ||
| // TODO: perhaps rewrite as: | ||
| // if self.ast.gap_after_children(self.storage) == self.cursor_pos | ||
| if at_end { | ||
| style.cursor = Some(CursorHalf::Right) | ||
| } | ||
| style | ||
| } | ||
| StyleLabel::Properties { | ||
| color, | ||
| bold, | ||
| italic, | ||
| underlined, | ||
| priority, | ||
| } => Style { | ||
| color: color.map(|x| (x, priority)), | ||
| bold: bold.map(|x| (x, priority)), | ||
| italic: italic.map(|x| (x, priority)), | ||
| underlined: underlined.map(|x| (x, priority)), | ||
| cursor: None, | ||
| }, | ||
| } | ||
| } | ||
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| fn node_style(self) -> Style { | ||
| let mut style = Style::default(); | ||
| if self.left_cursor == Some(self.ast) { | ||
| style.cursor = Some(CursorHalf::Left); | ||
| } else if self.right_cursor == Some(self.ast) { | ||
| style.cursor = Some(CursorHalf::Right); | ||
| } | ||
| style | ||
| } | ||
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| fn num_children(self) -> Option<usize> { | ||
| self.ast.num_children(self.storage) | ||
| } | ||
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| fn unwrap_text(self) -> &'d str { | ||
| self.ast.text(self.storage).bug().as_str() | ||
| } | ||
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| fn unwrap_child(self, i: usize) -> Self { | ||
| let child = self.ast.nth_child(self.storage, i); | ||
| self.with_ast(child) | ||
| } | ||
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| fn unwrap_last_child(self) -> Self { | ||
| let last_child = self.ast.last_child(self.storage).bug(); | ||
| self.with_ast(last_child) | ||
| } | ||
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| fn unwrap_prev_sibling(self, _: Self, _: usize) -> Self { | ||
| let sibling = self.ast.prev_sibling(self.storage).bug(); | ||
| self.with_ast(sibling) | ||
| } | ||
| } | ||
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| impl<'d> fmt::Debug for DocRef<'d> { | ||
| fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | ||
| write!(f, "DocRef({:?}, {:?})", self.ast, self.cursor_pos) | ||
| } | ||
| } |
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