feat: Add no graphics renderer mode

src/renderer/graphics.rs

@@ -25,7 +25,7 @@ use crate::{
     Annotation, AnnotationKind, Element, Group, Message, Origin, Patch, Report, Snippet, Title,
 };
 
-const ANONYMIZED_LINE_NUM: &str = "LL";
+pub(crate) const ANONYMIZED_LINE_NUM: &str = "LL";
 
 pub(crate) fn render(renderer: &Renderer, groups: Report<'_>) -> String {
     if renderer.short_message {
@@ -2295,7 +2295,7 @@ fn draw_line_separator(renderer: &Renderer, buffer: &mut StyledBuffer, line: usi
     buffer.puts(line, column, dots, ElementStyle::LineNumber);
 }
 
-trait MessageOrTitle {
+pub(crate) trait MessageOrTitle {
     fn level(&self) -> &Level<'_>;
     fn id(&self) -> Option<&Id<'_>>;
     fn text(&self) -> &str;
@@ -2366,7 +2366,7 @@ fn num_decimal_digits(num: Option<usize>) -> usize {
     MAX_DIGITS
 }
 
-fn str_width(s: &str) -> usize {
+pub(crate) fn str_width(s: &str) -> usize {
     s.chars().map(char_width).sum()
 }
 
@@ -2629,13 +2629,13 @@ pub(crate) struct UnderlineParts {
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
-enum TitleStyle {
+pub(crate) enum TitleStyle {
     Primary,
     Secondary,
     Message,
 }
 
-struct Hyperlink<D: fmt::Display> {
+pub(crate) struct Hyperlink<D: fmt::Display> {
     url: Option<D>,
 }
 

src/renderer/mod.rs

@@ -19,6 +19,7 @@
 //! ```
 
 pub(crate) mod graphics;
+pub(crate) mod no_graphics;
 pub(crate) mod source_map;
 pub(crate) mod stylesheet;
 
@@ -114,6 +115,7 @@ pub struct Renderer {
     stylesheet: Stylesheet,
     hyperlink: bool,
     short_message: bool,
+    no_graphics: bool,
 }
 
 impl Renderer {
@@ -127,6 +129,7 @@ impl Renderer {
             stylesheet: Stylesheet::plain(),
             hyperlink: false,
             short_message: false,
+            no_graphics: false,
         }
     }
 
@@ -159,6 +162,11 @@ impl Renderer {
         }
     }
 
+    pub const fn no_graphics(mut self, no_graphics: bool) -> Self {
+        self.no_graphics = no_graphics;
+        self
+    }
+
     /// Abbreviate the message
     pub const fn short_message(mut self, short_message: bool) -> Self {
         self.short_message = short_message;
@@ -229,7 +237,11 @@ impl Renderer {
 impl Renderer {
     /// Render a diagnostic [`Report`]
     pub fn render(&self, groups: Report<'_>) -> String {
-        graphics::render(self, groups)
+        if self.no_graphics {
+            no_graphics::render_no_graphics(self, groups).unwrap()
+        } else {
+            graphics::render(self, groups)
+        }
     }
 }