1 files changed, 90 insertions, 0 deletions
diff --git a/cli/doc/display.rs b/cli/doc/display.rs
new file mode 100644
index 000000000..9da04363f
--- /dev/null
+++ b/cli/doc/display.rs
@@ -0,0 +1,90 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+use crate::colors;
+use crate::swc_ecma_ast;
+use std::fmt::{Display, Formatter, Result};
+
+pub(crate) struct Indent(pub i64);
+
+impl Display for Indent {
+  fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+    for _ in 0..self.0 {
+      write!(f, "  ")?;
+    }
+    Ok(())
+  }
+}
+
+pub(crate) struct SliceDisplayer<'a, T: Display>(&'a [T], &'a str, bool);
+
+impl<'a, T: Display> SliceDisplayer<'a, T> {
+  pub fn new(
+    slice: &'a [T],
+    separator: &'a str,
+    trailing: bool,
+  ) -> SliceDisplayer<'a, T> {
+    SliceDisplayer(slice, separator, trailing)
+  }
+}
+
+impl<T: Display> Display for SliceDisplayer<'_, T> {
+  fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+    if self.0.is_empty() {
+      return Ok(());
+    }
+
+    write!(f, "{}", self.0[0])?;
+    for v in &self.0[1..] {
+      write!(f, "{}{}", self.1, v)?;
+    }
+
+    if self.2 {
+      write!(f, "{}", self.1)?;
+    }
+
+    Ok(())
+  }
+}
+
+pub(crate) fn display_abstract(is_abstract: bool) -> impl Display {
+  colors::magenta(if is_abstract { "abstract " } else { "" })
+}
+
+pub(crate) fn display_accessibility(
+  accessibility: Option<swc_ecma_ast::Accessibility>,
+) -> impl Display {
+  colors::magenta(
+    match accessibility.unwrap_or(swc_ecma_ast::Accessibility::Public) {
+      swc_ecma_ast::Accessibility::Public => "",
+      swc_ecma_ast::Accessibility::Protected => "protected ",
+      swc_ecma_ast::Accessibility::Private => "private ",
+    },
+  )
+}
+
+pub(crate) fn display_async(is_async: bool) -> impl Display {
+  colors::magenta(if is_async { "async " } else { "" })
+}
+
+pub(crate) fn display_generator(is_generator: bool) -> impl Display {
+  colors::magenta(if is_generator { "*" } else { "" })
+}
+
+pub(crate) fn display_method(method: swc_ecma_ast::MethodKind) -> impl Display {
+  colors::magenta(match method {
+    swc_ecma_ast::MethodKind::Getter => "get ",
+    swc_ecma_ast::MethodKind::Setter => "set ",
+    _ => "",
+  })
+}
+
+pub(crate) fn display_optional(is_optional: bool) -> impl Display {
+  colors::magenta(if is_optional { "?" } else { "" })
+}
+
+pub(crate) fn display_readonly(is_readonly: bool) -> impl Display {
+  colors::magenta(if is_readonly { "readonly " } else { "" })
+}
+
+pub(crate) fn display_static(is_static: bool) -> impl Display {
+  colors::magenta(if is_static { "static " } else { "" })
+}