From f56f4515fa722a9e20bca9457ff876e1a0a5f38c Mon Sep 17 00:00:00 2001
From: Manuel Nickschas <sputnick@quassel-irc.org>
Date: Thu, 8 Mar 2018 00:47:39 +0100
Subject: [PATCH] uistyle: Support rendering of strikethrough'd text

As defined in [1], format code 0x1e indicates text that is struck
through. Add support for rendering this accordingly.

Extend the stylesheet parser so the format can be defined, and
add to the default stylesheet.

[1] https://modern.ircdocs.horse/formatting.html#strikethrough
---
 data/stylesheets/default.qss | 7 ++++---
 src/uisupport/qssparser.cpp  | 8 +++++++-
 src/uisupport/uistyle.cpp    | 6 +++++-
 src/uisupport/uistyle.h      | 1 +
 4 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/data/stylesheets/default.qss b/data/stylesheets/default.qss
index 506dda97..6027980a 100644
--- a/data/stylesheets/default.qss
+++ b/data/stylesheets/default.qss
@@ -77,9 +77,10 @@ ChatLine[fg-color="0f"] { foreground: #c0c0c0; }
 ChatLine[bg-color="0f"] { background: #c0c0c0; }
 
 // mIRC formats
-ChatLine[format="bold"]      { font-weight: bold; }
-ChatLine[format="italic"]    { font-style: italic; }
-ChatLine[format="underline"] { font-style: underline; }
+ChatLine[format="bold"]          { font-weight: bold; }
+ChatLine[format="italic"]        { font-style: italic; }
+ChatLine[format="underline"]     { font-style: underline; }
+ChatLine[format="strikethrough"] { font-style: strikethrough; }
 
 // ChatView message colors
 ChatLine#notice { foreground: #916409; }
diff --git a/src/uisupport/qssparser.cpp b/src/uisupport/qssparser.cpp
index 07dab3a8..3e5cd8ed 100644
--- a/src/uisupport/qssparser.cpp
+++ b/src/uisupport/qssparser.cpp
@@ -322,6 +322,8 @@ std::pair<UiStyle::FormatType, UiStyle::MessageLabel> QssParser::parseFormatType
                     fmtType |= FormatType::Italic;
                 else if (condValue == "underline")
                     fmtType |= FormatType::Underline;
+                else if (condValue == "strikethrough")
+                    fmtType |= FormatType::Strikethrough;
                 else {
                     qWarning() << Q_FUNC_INFO << tr("Invalid format name: %1").arg(condValue);
                     return invalid;
@@ -713,7 +715,7 @@ QGradientStops QssParser::parseGradientStops(const QString &str_)
 
 void QssParser::parseFont(const QString &value, QTextCharFormat *format)
 {
-    static const QRegExp rx("((?:(?:normal|italic|oblique|underline|bold|100|200|300|400|500|600|700|800|900) ){0,2}) ?(\\d+)(pt|px)? \"(.*)\"");
+    static const QRegExp rx("((?:(?:normal|italic|oblique|underline|strikethrough|bold|100|200|300|400|500|600|700|800|900) ){0,2}) ?(\\d+)(pt|px)? \"(.*)\"");
     if (!rx.exactMatch(value)) {
         qWarning() << Q_FUNC_INFO << tr("Invalid font specification: %1").arg(value);
         return;
@@ -726,6 +728,7 @@ void QssParser::parseFont(const QString &value, QTextCharFormat *format)
             format->setFontItalic(true);
         else if (prop == "underline")
             format->setFontUnderline(true);
+        // Oblique is not a property supported by QTextCharFormat
         //else if(prop == "oblique")
         //  format->setStyle(QFont::StyleOblique);
         else if (prop == "bold")
@@ -753,6 +756,9 @@ void QssParser::parseFontStyle(const QString &value, QTextCharFormat *format)
         format->setFontItalic(true);
     else if (value == "underline")
         format->setFontUnderline(true);
+    else if (value == "strikethrough")
+        format->setFontStrikeOut(true);
+    // Oblique is not a property supported by QTextCharFormat
     //else if(value == "oblique")
     //  format->setStyle(QFont::StyleOblique);
     else {
diff --git a/src/uisupport/uistyle.cpp b/src/uisupport/uistyle.cpp
index bd9b013c..831c76eb 100644
--- a/src/uisupport/uistyle.cpp
+++ b/src/uisupport/uistyle.cpp
@@ -85,8 +85,9 @@ UiStyle::UiStyle(QObject *parent)
     // Now initialize the mapping between FormatCodes and FormatTypes...
     _formatCodes["%O"] = FormatType::Base;
     _formatCodes["%B"] = FormatType::Bold;
-    _formatCodes["%S"] = FormatType::Italic;
+    _formatCodes["%I"] = FormatType::Italic;
     _formatCodes["%U"] = FormatType::Underline;
+    _formatCodes["%S"] = FormatType::Strikethrough;
 
     _formatCodes["%DN"] = FormatType::Nick;
     _formatCodes["%DH"] = FormatType::Hostmask;
@@ -761,6 +762,9 @@ QString UiStyle::mircToInternal(const QString &mirc_)
                     mirc += "%R";
                     break;
                 case '\x1d':
+                    mirc += "%I";
+                    break;
+                case '\x1e':
                     mirc += "%S";
                     break;
                 case '\x1f':
diff --git a/src/uisupport/uistyle.h b/src/uisupport/uistyle.h
index 35d9eeeb..023808e7 100644
--- a/src/uisupport/uistyle.h
+++ b/src/uisupport/uistyle.h
@@ -81,6 +81,7 @@ public:
         Bold            = 0x00000100,
         Italic          = 0x00000200,
         Underline       = 0x00000400,
+        Strikethrough   = 0x00000800,
 
         // Individual parts of a message
         Timestamp       = 0x00001000,
-- 
2.20.1