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authorNerdyPepper <[email protected]>2019-06-20 11:34:49 +0100
committerNerdyPepper <[email protected]>2019-06-20 11:34:49 +0100
commit8c0cef894f00008ff1fe3e76588fca111776f68e (patch)
tree5cb6d6c70e6b49c4084bcdd7b87fe307e5b55ba1 /src/main.rs
parentf98a2796b7c1379b204a24586e598d7f8da9da9f (diff)
add basic syntax highlighting
Diffstat (limited to 'src/main.rs')
-rw-r--r--src/main.rs28
1 files changed, 16 insertions, 12 deletions
diff --git a/src/main.rs b/src/main.rs
index 8a66c4d..a8fbcf2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,12 +32,11 @@ use lazy_static::lazy_static;
32 32
33struct RLHelper { 33struct RLHelper {
34 completer: FilenameCompleter, 34 completer: FilenameCompleter,
35 highlighter: MatchingBracketHighlighter, 35 highlighter: LineHighlighter,
36 hinter: AnswerHinter, 36 hinter: AnswerHinter,
37} 37}
38 38
39struct AnswerHinter { } 39struct AnswerHinter { }
40
41impl Hinter for AnswerHinter { 40impl Hinter for AnswerHinter {
42 fn hint(&self, line: &str, _: usize, _: &Context) -> Option<String> { 41 fn hint(&self, line: &str, _: usize, _: &Context) -> Option<String> {
43 let input = line.trim(); 42 let input = line.trim();
@@ -53,22 +52,27 @@ impl Hinter for AnswerHinter {
53 } 52 }
54} 53}
55 54
56impl Highlighter for RLHelper { 55struct LineHighlighter { }
57 fn highlight_prompt<'p>(&self, prompt: &'p str) -> Cow<'p, str> { 56impl Highlighter for LineHighlighter {
58 Owned(String::from(prompt)) 57 fn highlight_hint<'h>(&self, hint: &'h str) -> Cow<'h, str> {
58 Owned(format!("\x1b[90m{}\x1b[0m", hint))
59 }
60 fn highlight<'l>(&self, line: &'l str, _: usize) -> Cow<'l, str> {
61 let op = eval_math_expression(line);
62 match op {
63 Ok(_) => Owned(line.into()),
64 Err(_) => Owned(format!("\x1b[31m{}\x1b[0m", line))
65 }
59 } 66 }
67}
60 68
69impl Highlighter for RLHelper {
61 fn highlight_hint<'h>(&self, hint: &'h str) -> Cow<'h, str> { 70 fn highlight_hint<'h>(&self, hint: &'h str) -> Cow<'h, str> {
62 Owned("\x1b[90m".to_owned() + hint + "\x1b[0m") 71 self.highlighter.highlight_hint(hint)
63 } 72 }
64
65 fn highlight<'l>(&self, line: &'l str, pos: usize) -> Cow<'l, str> { 73 fn highlight<'l>(&self, line: &'l str, pos: usize) -> Cow<'l, str> {
66 self.highlighter.highlight(line, pos) 74 self.highlighter.highlight(line, pos)
67 } 75 }
68
69 fn highlight_char(&self, line: &str, pos: usize) -> bool {
70 self.highlighter.highlight_char(line, pos)
71 }
72} 76}
73 77
74impl Completer for RLHelper { 78impl Completer for RLHelper {
@@ -123,7 +127,7 @@ fn main() {
123 let mut rl = Editor::with_config(config); 127 let mut rl = Editor::with_config(config);
124 let h = RLHelper { 128 let h = RLHelper {
125 completer: FilenameCompleter::new(), 129 completer: FilenameCompleter::new(),
126 highlighter: MatchingBracketHighlighter::new(), 130 highlighter: LineHighlighter {},
127 hinter: AnswerHinter {} 131 hinter: AnswerHinter {}
128 }; 132 };
129 rl.set_helper(Some(h)); 133 rl.set_helper(Some(h));