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use super::*;
pub struct Renderer<D: Fmt> {
fmt: D,
}
impl Renderer<PrettyFmt<'static>> {
pub fn new() -> Self {
Renderer {
fmt: PrettyFmt::new(),
}
}
}
impl Default for Renderer<PrettyFmt<'static>> {
fn default() -> Self {
Self::new()
}
}
impl<D: Fmt> Renderer<D> {
pub fn with_fmt<K: Fmt>(self, a: K) -> Renderer<K> {
Renderer { fmt: a }
}
pub fn render<E: Elem + Locked, W: fmt::Write>(
&mut self,
elem: E,
mut writer: W,
) -> fmt::Result {
ElemWrite(WriteWrap(&mut writer), &mut self.fmt).render(elem)
}
pub fn render_escapable<E: Elem, W: fmt::Write>(
&mut self,
elem: E,
mut writer: W,
) -> fmt::Result {
let e = &mut ElemWrite(WriteWrap(&mut writer), &mut self.fmt);
let tail = elem.render_head(e)?;
tail.render(e)
}
}
pub trait Fmt {
fn push(&mut self);
fn pop(&mut self);
fn tabs(&mut self, w: &mut dyn fmt::Write) -> fmt::Result;
fn end_tag(&mut self, w: &mut dyn fmt::Write) -> fmt::Result;
fn set_inline_mode(&mut self, val: bool);
fn is_inline_mode(&mut self) -> bool;
}
pub struct PrettyFmt<'a> {
tabs: usize,
tab_char: &'a str,
inline: bool,
}
impl Default for PrettyFmt<'static> {
fn default() -> Self {
Self::new()
}
}
impl PrettyFmt<'static> {
pub fn new() -> Self {
PrettyFmt {
tabs: 0,
tab_char: "\t",
inline: false,
}
}
}
impl<'a> PrettyFmt<'a> {
pub fn with_tab(self, tab: &str) -> PrettyFmt {
PrettyFmt {
tabs: self.tabs,
tab_char: tab,
inline: self.inline,
}
}
}
impl Fmt for PrettyFmt<'_> {
fn set_inline_mode(&mut self, val: bool) {
self.inline = val;
}
fn is_inline_mode(&mut self) -> bool {
self.inline
}
fn tabs(&mut self, w: &mut dyn fmt::Write) -> fmt::Result {
if !self.inline {
for _ in 0..self.tabs {
write!(w, "{}", self.tab_char)?;
}
}
Ok(())
}
fn push(&mut self) {
self.tabs += 1;
}
fn pop(&mut self) {
self.tabs -= 1;
}
fn end_tag(&mut self, w: &mut dyn fmt::Write) -> fmt::Result {
if !self.inline {
writeln!(w)?;
}
Ok(())
}
}
pub struct NoFmt;
impl Fmt for NoFmt {
fn tabs(&mut self, _: &mut dyn fmt::Write) -> fmt::Result {
Ok(())
}
fn push(&mut self) {}
fn pop(&mut self) {}
fn end_tag(&mut self, _: &mut dyn fmt::Write) -> fmt::Result {
Ok(())
}
fn set_inline_mode(&mut self, _: bool) {}
fn is_inline_mode(&mut self) -> bool {
true
}
}