Remove fn parse() from public API

The parse function is an odd one in the current API, other functions
can be separated cleanly into functions that are convenient and functions
that need to be configured. The parse function does not advertise what
configuration it uses, and will silently drop css information, as it parses
with config::plain() as default configuration. This can lead to the following
misuse of the public API

let render_tree = parse(html)?;
customcfg.render_to_string(render_tree, 80)?;

src/lib.rs

@@ -2370,7 +2370,8 @@ pub mod config {
                 wrap_links: self.wrap_links,
             }
         }
-        /// Parse with context.
+
+        /// Reads and parses HTML from `input` and prepares a render tree.
         pub fn do_parse<R: io::Read>(&self, input: R) -> Result<RenderTree> {
             let doc = plain().parse_html(input)?;
             self.dom_to_render_tree(&doc)
@@ -2660,11 +2661,6 @@ impl<D: TextDecorator> RenderedText<D> {
     }
 }
 
-/// Reads and parses HTML from `input` and prepares a render tree.
-pub fn parse(input: impl io::Read) -> Result<RenderTree> {
-    config::plain().do_parse(input)
-}
-
 /// Reads HTML from `input`, decorates it using `decorator`, and
 /// returns a `String` with text wrapped to `width` columns.
 pub fn from_read_with_decorator<R, D>(input: R, width: usize, decorator: D) -> Result<String>

src/tests.rs

@@ -5,7 +5,7 @@ use crate::{config, Error};
 #[cfg(feature = "css")]
 use super::render::text_renderer::RichDecorator;
 use super::render::text_renderer::{RichAnnotation, TaggedLine, TrivialDecorator};
-use super::{from_read, from_read_with_decorator, parse, TextDecorator};
+use super::{from_read, from_read_with_decorator, TextDecorator};
 
 /// Like assert_eq!(), but prints out the results normally as well
 macro_rules! assert_eq_str {
@@ -1361,33 +1361,32 @@ fn test_s() {
 
 #[test]
 fn test_multi_parse() {
+    let cfg = config::plain();
     let html: &[u8] = b"one two three four five six seven eight nine ten eleven twelve thirteen \
                         fourteen fifteen sixteen seventeen";
-    let tree = parse(html).unwrap();
+    let tree = cfg.do_parse(html).unwrap();
     assert_eq!(
         "one two three four five six seven eight nine ten eleven twelve thirteen fourteen\n\
          fifteen sixteen seventeen\n",
-        config::plain().render_to_string(tree.clone(), 80).unwrap()
+        cfg.render_to_string(tree.clone(), 80).unwrap()
     );
     assert_eq!(
         "one two three four five six seven eight nine ten eleven twelve\n\
          thirteen fourteen fifteen sixteen seventeen\n",
-        config::plain().render_to_string(tree.clone(), 70).unwrap()
+        cfg.render_to_string(tree.clone(), 70).unwrap()
     );
     assert_eq!(
         "one two three four five six seven eight nine ten\n\
          eleven twelve thirteen fourteen fifteen sixteen\n\
          seventeen\n",
-        config::plain().render_to_string(tree.clone(), 50).unwrap()
+        cfg.render_to_string(tree.clone(), 50).unwrap()
     );
 }
 
 #[test]
 fn test_read_rich() {
     let html: &[u8] = b"<strong>bold</strong>";
-    let lines = config::rich()
-        .render_to_lines(parse(html).unwrap(), 80)
-        .unwrap();
+    let lines = config::rich().lines_from_read(html, 80).unwrap();
     let tag = vec![RichAnnotation::Strong];
     let line = TaggedLine::from_string("*bold*".to_owned(), &tag);
     assert_eq!(vec![line], lines);
@@ -1397,7 +1396,7 @@ fn test_read_rich() {
 fn test_read_custom() {
     let html: &[u8] = b"<strong>bold</strong>";
     let lines = config::with_decorator(TrivialDecorator::new())
-        .render_to_lines(parse(html).unwrap(), 80)
+        .lines_from_read(html, 80)
         .unwrap();
     let tag = vec![()];
     let line = TaggedLine::from_string("bold".to_owned(), &tag);
@@ -1409,7 +1408,7 @@ fn test_pre_rich() {
     use RichAnnotation::*;
     assert_eq!(
         config::rich()
-            .render_to_lines(parse(&b"<pre>test</pre>"[..]).unwrap(), 100)
+            .lines_from_read(&b"<pre>test</pre>"[..], 100)
             .unwrap(),
         [TaggedLine::from_string(
             "test".into(),
@@ -1419,7 +1418,7 @@ fn test_pre_rich() {
 
     assert_eq!(
         config::rich()
-            .render_to_lines(crate::parse("<pre>testlong</pre>".as_bytes()).unwrap(), 4)
+            .lines_from_read("<pre>testlong</pre>".as_bytes(), 4)
             .unwrap(),
         [
             TaggedLine::from_string("test".into(), &vec![Preformat(false)]),
@@ -1431,10 +1430,7 @@ fn test_pre_rich() {
     // tags.
     assert_eq!(
         config::rich()
-            .render_to_lines(
-                crate::parse(r#"<p style="white-space: pre">testlong</p>"#.as_bytes()).unwrap(),
-                4
-            )
+            .lines_from_read(r#"<p style="white-space: pre">testlong</p>"#.as_bytes(), 4)
             .unwrap(),
         [
             TaggedLine::from_string("test".into(), &vec![]),
@@ -1931,8 +1927,9 @@ fn test_issue_93_x() {
         114, 104, 60, 47, 101, 109, 62, 60, 99, 99, 172, 97, 97, 58, 60, 119, 99, 64, 126, 118,
         104, 100, 100, 107, 105, 60, 120, 98, 255, 255, 255, 0, 60, 255, 127, 46, 60, 113, 127,
     ];
-    let _local0 = crate::parse(&data[..]).unwrap();
-    let _local1 = config::with_decorator(TrivialDecorator::new()).render_to_string(_local0, 1);
+    let cfg = config::with_decorator(TrivialDecorator::new());
+    let _local0 = cfg.do_parse(&data[..]).unwrap();
+    let _local1 = cfg.render_to_string(_local0, 1);
 }
 
 #[test]