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use std::fmt::{Display, Formatter};
use crate::{Expression, Statement};
#[derive(Clone, Debug)]
pub struct CodeBuffer {
indent: String,
line_ending: String,
code: String,
}
impl CodeBuffer {
pub fn new(indent: &str, line_ending: &str, capacity: usize) -> Self {
Self {
indent: indent.to_string(),
line_ending: line_ending.to_string(),
code: String::with_capacity(capacity),
}
}
}
impl Default for CodeBuffer {
fn default() -> Self {
Self::new("\t", "\n", 4 * 1024)
}
}
impl CodeBuffer {
pub fn write(&mut self, code: &str) {
self.code.push_str(code);
}
pub fn indent(&mut self, level: usize) {
for _ in 0..level {
self.code.push_str(self.indent.as_str());
}
}
pub fn end_line(&mut self) {
self.code.push_str(self.line_ending.as_str());
}
pub fn line(&mut self, level: usize, code: &str) {
self.indent(level);
self.write(code);
self.end_line();
}
pub fn space(&mut self) {
self.code.push_str(" ");
}
}
impl CodeBuffer {
pub fn peek(&self) -> &str {
self.code.as_str()
}
pub fn export(self) -> String {
self.code
}
}
impl CodeBuffer {
pub fn clear(&mut self) {
self.code.clear()
}
}
impl CodeBuffer {
pub fn display_expression<E: Expression>(expression: &E) -> String {
let mut b: CodeBuffer = CodeBuffer::default();
expression.write(&mut b);
b.export()
}
pub fn display_statement<S: Statement>(statement: &S) -> String {
let mut b: CodeBuffer = CodeBuffer::default();
statement.write(&mut b, 0);
b.export()
}
}
impl Display for CodeBuffer {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.code.as_str())
}
}