handle escape for defined matches only

src/app/browser/window/tab/item/page/content/text/markdown/tags.rs

@@ -81,12 +81,16 @@ impl Tags {
         reference::render_links(buffer, base, link_color, links);
 
         // Cleanup unformatted escape chars
-        let mut cursor = buffer.start_iter();
-        while let Some((mut match_start, mut match_end)) =
-            cursor.forward_search(ESC, TextSearchFlags::CASE_INSENSITIVE, None)
-        {
-            buffer.delete(&mut match_start, &mut match_end);
-            cursor = match_end;
+        for escapes in ESCAPES {
+            for escape in *escapes {
+                let mut cursor = buffer.start_iter();
+                while let Some((mut match_start, mut match_end)) =
+                    cursor.forward_search(escape, TextSearchFlags::CASE_INSENSITIVE, None)
+                {
+                    buffer.delete(&mut match_start, &mut match_end);
+                    cursor = match_end;
+                }
+            }
         }
 
         // Render placeholders
@@ -99,7 +103,12 @@ impl Tags {
             s = reference::strip_tags(&s);
             s = strike::strip_tags(&s);
             s = underline::strip_tags(&s);
-            s.replace(ESC, "")
+            for escapes in ESCAPES {
+                for escape in *escapes {
+                    s = s.replace(escape, "");
+                }
+            }
+            s
         })
     }
 }
@@ -109,4 +118,17 @@ pub fn format_header_fragment(value: &str) -> GString {
     Uri::escape_string(&value.to_lowercase().replace(" ", "-"), None, true)
 }
 
-const ESC: &str = "\\";
+const ESCAPES: &[&[&str]] = &[
+    &["\\\n"],
+    bold::ESCAPES,
+    // same with pre
+    // code::ESCAPES,
+    header::ESCAPES,
+    // same with bold and reference
+    // list::ESCAPES,
+    pre::ESCAPES,
+    quote::ESCAPES,
+    reference::ESCAPES,
+    strike::ESCAPES,
+    underline::ESCAPES,
+];

src/app/browser/window/tab/item/page/content/text/markdown/tags/bold.rs

@@ -7,6 +7,8 @@ use regex::Regex;
 
 const REGEX_BOLD: &str = r"\*\*(?P<text>[^*]+)\*\*";
 
+pub const ESCAPES: &[&str] = &["\\*"]; // same with list
+
 pub struct Bold(TextTag);
 
 impl Bold {

src/app/browser/window/tab/item/page/content/text/markdown/tags/code.rs

@@ -12,6 +12,9 @@ use syntax::Syntax;
 
 const REGEX_CODE: &str = r"(?s)```[ \t]*(?P<alt>.*?)\n(?P<data>.*?)```";
 
+// same with pre
+// pub const ESCAPES: &[&str] = &["\\`"];
+
 struct Entry {
     alt: Option<String>,
     data: String,

src/app/browser/window/tab/item/page/content/text/markdown/tags/header.rs

@@ -8,6 +8,8 @@ use std::collections::HashMap;
 
 const REGEX_HEADER: &str = r"(?m)^(?P<level>#{1,6})\s+(?P<title>.*)$";
 
+pub const ESCAPES: &[&str] = &["\\#"];
+
 pub struct Header {
     h1: TextTag,
     h2: TextTag,

src/app/browser/window/tab/item/page/content/text/markdown/tags/list.rs

@@ -7,6 +7,9 @@ use regex::Regex;
 const REGEX_LIST: &str =
     r"(?m)^(?P<level>[ \t]*)\*[ \t]+(?:(?P<state>\[[ xX]\])[ \t]+)?(?P<text>.*)";
 
+// same with bold and reference
+// pub const ESCAPES: &[&str] = &["\\*","\\[","\\]"];
+
 struct State(bool);
 
 impl State {

src/app/browser/window/tab/item/page/content/text/markdown/tags/pre.rs

@@ -10,6 +10,8 @@ const REGEX_PRE: &str = r"`(?P<text>[^`]+)`";
 const TAG_FONT: &str = "monospace"; // @TODO
 const TAG_SCALE: f64 = 0.9;
 
+pub const ESCAPES: &[&str] = &["\\`"]; // same with code
+
 pub struct Pre(TextTag);
 
 impl Pre {

src/app/browser/window/tab/item/page/content/text/markdown/tags/quote.rs

@@ -8,6 +8,8 @@ use regex::Regex;
 
 const REGEX_QUOTE: &str = r"(?m)>\s*(?P<text>.*)$";
 
+pub const ESCAPES: &[&str] = &["\\>"];
+
 pub struct Quote(TextTag);
 
 impl Quote {

src/app/browser/window/tab/item/page/content/text/markdown/tags/reference.rs

@@ -12,6 +12,8 @@ const REGEX_IMAGE: &str = r"!\[(?P<alt>[^\]]*)\]\((?P<url>[^\)]+)\)";
 const REGEX_IMAGE_LINK: &str =
     r"\[(?P<is_img>!)\[(?P<alt>[^\]]*)\]\((?P<img_url>[^\)]+)\)\]\((?P<link_url>[^\)]+)\)";
 
+pub const ESCAPES: &[&str] = &["\\!", "\\[", "\\]", "\\(", "\\)"];
+
 struct Reference {
     uri: Uri,
     alt: String,

src/app/browser/window/tab/item/page/content/text/markdown/tags/strike.rs

@@ -7,6 +7,8 @@ use regex::Regex;
 
 const REGEX_STRIKE: &str = r"~~(?P<text>.+?)~~";
 
+pub const ESCAPES: &[&str] = &["\\~"];
+
 pub struct Strike(TextTag);
 
 impl Strike {

src/app/browser/window/tab/item/page/content/text/markdown/tags/underline.rs

@@ -8,6 +8,8 @@ use regex::Regex;
 
 const REGEX_UNDERLINE: &str = r"\b_(?P<text>[^_]+)_\b";
 
+pub const ESCAPES: &[&str] = &["\\_"];
+
 pub struct Underline(TextTag);
 
 impl Underline {