style: support STRIKE and NOTES

- Add "strikeout" support in mdhl file;

peg-highlight/pmh_styleparser.c

@@ -212,6 +212,7 @@ static pmh_attr_font_styles *new_font_styles()
     ret->italic = false;
     ret->bold = false;
     ret->underlined = false;
+    ret->strikeout = false;
     return ret;
 }
 
@@ -437,6 +438,8 @@ static pmh_style_attribute *interpret_attributes(style_parser_data *p_data,
                     attr->value->font_styles->bold = true;
                 else if (EQUALS(standardized_value, "underlined"))
                     attr->value->font_styles->underlined = true;
+                else if (EQUALS(standardized_value, "strikeout"))
+                    attr->value->font_styles->strikeout = true;
                 else {
                     report_error(p_data, cur->line_number,
                                  "Value '%s' is invalid for attribute '%s'",

peg-highlight/pmh_styleparser.h

@@ -33,6 +33,7 @@ typedef struct
     bool italic;
     bool bold;
     bool underlined;
+    bool strikeout;
 } pmh_attr_font_styles;
 
 /** \brief Font size attribute value. */

src/hgmarkdownhighlighter.cpp

@@ -811,7 +811,7 @@ void HGMarkdownHighlighter::parseInternal()
     memcpy(content, data, len);
     content[len] = '\0';
 
-    pmh_markdown_to_elements(content, pmh_EXT_NONE, &result);
+    pmh_markdown_to_elements(content, pmh_EXT_STRIKE, &result);
 }
 
 void HGMarkdownHighlighter::handleContentChange(int /* position */, int charsRemoved, int charsAdded)

src/resources/themes/v_moonlight/v_moonlight.mdhl

@@ -130,7 +130,7 @@ foreground: 5c6370
 VERBATIM
 foreground: 98c379
 font-family: Consolas, Monaco, Andale Mono, Monospace, Courier New
-# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, color)
+# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, strikeout, color)
 # The last occurence of the same attribute takes effect
 # Could specify multiple attribute in one line
 hljs-comment: 5c6370
@@ -172,4 +172,5 @@ BLOCKQUOTE
 foreground: 5c6370
 
 STRIKE
-strike-color: 586e75
+foreground: e57373
+font-style: strikeout

src/resources/themes/v_native/v_native.mdhl

@@ -129,7 +129,7 @@ foreground: 93a1a1
 VERBATIM
 foreground: 673ab7
 font-family: Consolas, Monaco, Andale Mono, Monospace, Courier New
-# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, color)
+# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, strikeout, color)
 # The last occurence of the same attribute takes effect
 hljs-comment: 6c6c6c
 hljs-keyword: 0000ee
@@ -170,4 +170,5 @@ BLOCKQUOTE
 foreground: 00af00
 
 STRIKE
-strike-color: 586e75
+foreground: b71c1c
+font-style: strikeout

src/resources/themes/v_pure/v_pure.mdhl

@@ -130,7 +130,7 @@ foreground: 93a1a1
 VERBATIM
 foreground: 673ab7
 font-family: Consolas, Monaco, Andale Mono, Monospace, Courier New
-# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, color)
+# [VNote] Codeblock sylte from HighlightJS (bold, italic, underlined, strikeout, color)
 # The last occurence of the same attribute takes effect
 # Could specify multiple attribute in one line
 hljs-comment: 6c6c6c
@@ -171,4 +171,5 @@ BLOCKQUOTE
 foreground: 00af00
 
 STRIKE
-strike-color: 586e75
+foreground: b71c1c
+font-style: strikeout

src/vstyleparser.cpp

@@ -88,12 +88,19 @@ QTextCharFormat VStyleParser::QTextCharFormatFromAttrs(pmh_style_attribute *attr
             if (fontStyle->italic) {
                 format.setFontItalic(true);
             }
+
             if (fontStyle->bold) {
                 format.setFontWeight(QFont::Bold);
             }
+
             if (fontStyle->underlined) {
                 format.setFontUnderline(true);
             }
+
+            if (fontStyle->strikeout) {
+                format.setFontStrikeOut(true);
+            }
+
             break;
         }
 
@@ -159,6 +166,8 @@ QHash<QString, QTextCharFormat> VStyleParser::fetchCodeBlockStyles(const QFont &
                     format.setFontItalic(true);
                 } else if (val == "underlined") {
                     format.setFontUnderline(true);
+                } else if (val == "strikeout") {
+                    format.setFontStrikeOut(true);
                 } else {
                     // Treat it as the color RGB value string without '#'.
                     QColor color("#" + val);