Split side panel settings into tabs :

Create plot settings tab and highlights settings tab.
- The highlights settings allow user to set until 4 regex sentence to find in content and highlight them with predefined color
- Edits the plot settings to hide the plot view if number of plot equals 0

Signed-off-by: stropee <simon@sirocha.fr>

Author: simon0356

src/custom_highlighter.rs

@@ -0,0 +1,101 @@
+
+
+use eframe::egui::{FontFamily, FontId};
+use eframe::egui::{self, text::LayoutJob, Color32, TextFormat};
+
+
+extern crate regex;
+use regex::Regex;
+use regex::RegexSet;
+const DEFAULT_FONT_ID: FontId = FontId::new(14.0, FontFamily::Monospace);
+
+
+#[derive(Debug)]
+#[derive(Clone, Copy)]
+pub struct HighLightElement
+{
+    pos_start:usize,
+    pos_end:usize,
+    token_idx:usize
+}
+impl HighLightElement{
+    pub fn new(pos_start: usize, pos_end:usize,token_idx:usize) -> Self{
+        Self{
+            pos_start,
+            pos_end,
+            token_idx
+        }
+    }
+}
+pub fn highlight_impl(
+    _ctx: &egui::Context,
+    text: &str,
+    tokens: Vec<String>,
+    default_color:Color32
+) -> Option<LayoutJob> {
+    // Extremely simple syntax highlighter for when we compile without syntect
+
+
+    let mut my_tokens = tokens.clone();
+    for token in my_tokens.clone()
+    {
+        if token.len() < 1
+        {
+            let index = my_tokens.iter().position(|x| *x == token).unwrap();
+            my_tokens.remove(index);
+        }
+    }
+    let set = RegexSet::new(my_tokens.clone()).unwrap();
+    let content_string = String::from(text);
+    // let _ = file.read_to_string(&mut isi);
+    let mut regexs:Vec<Regex> = Vec::new();
+    for sentence in my_tokens.clone() {
+        let re = Regex::new(&sentence).unwrap(); // should not panic because we parsed Regexes above already
+        regexs.push(re);
+    }
+
+    let mut highlight_list : Vec<HighLightElement> = Vec::<HighLightElement>::new();
+
+    for idx in set.matches(&content_string).into_iter() {
+        for caps in regexs[idx].captures_iter(&content_string) {
+            highlight_list.push(HighLightElement::new(
+                caps.get(0).unwrap().start(), 
+                caps.get(0).unwrap().end(),
+                idx));
+        }
+    }
+
+    highlight_list.sort_by_key(|item| (item.pos_start, item.pos_end));
+
+
+    let mut job = LayoutJob::default();
+    let mut previous = HighLightElement::new(0,0, 0);
+    for matches in highlight_list
+    {
+        if previous.pos_end >= matches.pos_start
+        {
+            continue
+        }
+        job.append(&text[previous.pos_end..(matches.pos_start)], 0.0, TextFormat::simple(DEFAULT_FONT_ID, default_color));
+        if matches.token_idx == 0
+        {
+            job.append(&text[matches.pos_start..matches.pos_end], 0.0, TextFormat::simple(DEFAULT_FONT_ID, Color32::from_rgb(255, 100, 100)));
+        }else if matches.token_idx == 1
+        {
+            job.append(&text[matches.pos_start..matches.pos_end], 0.0, TextFormat::simple(DEFAULT_FONT_ID, Color32::from_rgb(225, 159, 0)));
+            
+        }else if matches.token_idx == 2
+        {
+            job.append(&text[matches.pos_start..matches.pos_end], 0.0, TextFormat::simple(DEFAULT_FONT_ID, Color32::from_rgb(87, 165, 171)));
+        }else if matches.token_idx == 3
+        {
+            job.append(&text[matches.pos_start..matches.pos_end], 0.0, TextFormat::simple(DEFAULT_FONT_ID, Color32::from_rgb(109, 147, 226)));
+        }
+        previous = matches.clone();
+    }
+    job.append(&text[previous.pos_end..], 0.0, TextFormat::simple(DEFAULT_FONT_ID, default_color));
+
+
+    Some(job)
+}
+