Add centered text

Cargo.lock

@@ -358,7 +358,7 @@ dependencies = [
 
 [[package]]
 name = "snekdown"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "chrono 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "snekdown"
-version = "0.6.0"
+version = "0.7.0"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

README.md

@@ -82,6 +82,7 @@ Header with rows
 ### Placeholders
 
 Placeholders can be used to insert special elements in a specific place.
+Placeholders are always case insensitive.
 
 ```md
 Insert the table of contents
@@ -138,4 +139,11 @@ Set the source of a quote
 
 Set options for placeholders
 [[toc]][ordered]
+```
+
+### Centered Text
+
+```
+|| These two lines
+|| are centered
 ```

src/format/assets/style.css

@@ -116,4 +116,8 @@ blockquote {
     display: block;
     color: #444;
     font-style: italic;
+}
+
+.centered {
+    text-align: center;
 }

src/format/html.rs

@@ -36,6 +36,7 @@ impl ToHtml for Line {
             Line::Text(text) => text.to_html(),
             Line::Ruler(ruler) => ruler.to_html(),
             Line::Anchor(anchor) => anchor.to_html(),
+            Line::Centered(centered) => centered.to_html(),
         }
     }
 }
@@ -147,7 +148,7 @@ impl ToHtml for Paragraph {
             .elements
             .iter()
             .fold("".to_string(), |a, b| combine_with_lb!(a, b));
-        format!("<p>{}</p>", inner)
+        format!("<div class='paragraph'>{}</div>", inner)
     }
 }
 
@@ -414,3 +415,9 @@ impl ToHtml for InlineMetadata {
         }
     }
 }
+
+impl ToHtml for Centered {
+    fn to_html(&self) -> String {
+        format!("<div class='centered'>{}</div>", self.line.to_html())
+    }
+}

src/parsing/elements.rs

@@ -57,6 +57,7 @@ pub enum Line {
     Text(TextLine),
     Ruler(Ruler),
     Anchor(Anchor),
+    Centered(Centered),
 }
 
 #[derive(Clone, Debug)]
@@ -220,6 +221,11 @@ pub struct Anchor {
     pub(crate) reference: String,
 }
 
+#[derive(Clone, Debug)]
+pub struct Centered {
+    pub(crate) line: TextLine,
+}
+
 // implementations
 
 impl Document {

src/parsing/parser.rs

@@ -650,7 +650,6 @@ impl Parser {
         self.seek_whitespace();
         while let Ok(row) = self.parse_row() {
             table.add_row(row);
-            self.seek_whitespace();
         }
 
         Ok(table)
@@ -662,23 +661,39 @@ impl Parser {
         self.seek_inline_whitespace();
         self.assert_special(&PIPE, start_index)?;
         self.skip_char();
+        if self.check_special(&PIPE) {
+            return Err(self.revert_with_error(start_index));
+        }
         self.inline_break_at.push(PIPE);
 
         self.seek_inline_whitespace();
         let mut row = Row::new();
-        while let Ok(element) = self.parse_line() {
-            row.add_cell(Cell { text: element });
-            if self.check_special(&PIPE) {
-                if self.next_char() == None {
+        loop {
+            let mut element = TextLine::new();
+            while let Ok(inline) = self.parse_inline() {
+                element.subtext.push(inline);
+                if self.check_linebreak() || self.check_special(&PIPE) {
                     break;
                 }
             }
+            row.add_cell(Cell {
+                text: Line::Text(element),
+            });
+            if self.check_special(&PIPE) {
+                self.skip_char();
+            }
             if self.check_linebreak() {
                 break;
             }
             self.seek_inline_whitespace();
         }
         self.inline_break_at.clear();
+        if self.check_special(&PIPE) {
+            self.skip_char();
+            self.skip_char();
+        } else {
+            self.skip_char();
+        }
 
         if row.cells.len() > 0 {
             Ok(row)
@@ -693,14 +708,27 @@ impl Parser {
             Err(ParseError::new(self.index))
         } else {
             if let Ok(ruler) = self.parse_ruler() {
-                return Ok(Line::Ruler(ruler));
+                Ok(Line::Ruler(ruler))
+            } else if let Ok(centered) = self.parse_centered() {
+                Ok(Line::Centered(centered))
             } else if let Ok(text) = self.parse_text_line() {
-                return Ok(Line::Text(text));
+                Ok(Line::Text(text))
+            } else {
+                Err(ParseError::new(self.index))
             }
-            return Err(ParseError::new(self.index));
         }
     }
 
+    /// parses centered text
+    fn parse_centered(&mut self) -> Result<Centered, ParseError> {
+        let start_index = self.index;
+        self.assert_special_sequence(&SQ_CENTERED_START, start_index)?;
+        self.skip_char();
+        let line = self.parse_text_line()?;
+
+        Ok(Centered { line })
+    }
+
     /// parses a placeholder element
     pub(crate) fn parse_placeholder(&mut self) -> Result<Arc<Mutex<Placeholder>>, ParseError> {
         let start_index = self.index;

src/parsing/tokens.rs

@@ -52,15 +52,16 @@ pub(crate) const BOLD: [char; 2] = [ASTERISK, ASTERISK];
 
 pub(crate) const QUOTES: [char; 2] = [SINGLE_QUOTE, DOUBLE_QUOTE];
 
-pub(crate) const BLOCK_SPECIAL_CHARS: [&[char]; 8] = [
+pub(crate) const BLOCK_SPECIAL_CHARS: [&[char]; 9] = [
     &[HASH],
     &[HASH, META_OPEN],
     &[MINUS, SPACE],
-    &[BACKTICK, BACKTICK, BACKTICK],
+    &SQ_CODE_BLOCK,
     &[PIPE],
     &[QUOTE_START],
     &[META_OPEN],
     &[IMPORT_START, IMPORT_OPEN],
+    &SQ_CENTERED_START,
 ];
 
 pub(crate) const INLINE_SPECIAL_CHARS: [char; 8] = [
@@ -77,6 +78,7 @@ pub(crate) const SQ_CODE_BLOCK: [char; 3] = [BACKTICK, BACKTICK, BACKTICK];
 pub(crate) const SQ_RULER: [char; 5] = [MINUS, SPACE, MINUS, SPACE, MINUS];
 pub(crate) const SQ_PHOLDER_START: [char; 2] = [PHOLDER_OPEN, PHOLDER_OPEN];
 pub(crate) const SQ_PHOLDER_STOP: [char; 2] = [PHOLDER_CLOSE, PHOLDER_CLOSE];
+pub(crate) const SQ_CENTERED_START: [char; 2] = [PIPE, PIPE];
 
 // expressions