Fonts: Add Medium SourceCodePro font variants

Add the Medium font families.

The Medium variants make sure that on a MacBook Pro with Retina display
the font doesn't look out of place being too thin.

Taken from https://github.com/adobe-fonts/source-code-pro/releases/tag/
2.030R-ro%2F1.050R-it

We need to stay with version 2.0.30 due to hinting on Windows, and to
force QFont::Medium on macOS due to the fact that the medium font is not
picked up. Newer versions like 2.0.42 do not have this issue.

Task-number: QTCREATORBUG-29964
Change-Id: I4c0fba5730c4a6b869d900642b675698c29c6ae8
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

README.md

@@ -647,9 +647,12 @@ SQLite (https://www.sqlite.org) is in the Public Domain.
 
   Qt Creator ships with the following fonts licensed under OFL-1.1:
 
-   * SourceCodePro-Regular.ttf
-   * SourceCodePro-It.ttf
    * SourceCodePro-Bold.ttf
+   * SourceCodePro-BoldIt.ttf
+   * SourceCodePro-It.ttf
+   * SourceCodePro-Medium.ttf
+   * SourceCodePro-MediumIt.ttf
+   * SourceCodePro-Regular.ttf
 
   SIL OPEN FONT LICENSE
 

doc/qtcreator/src/overview/creator-acknowledgements.qdoc

@@ -686,9 +686,12 @@
         \QC ships with the following fonts licensed under OFL-1.1:
 
         \list
-            \li SourceCodePro-Regular.ttf
-            \li SourceCodePro-It.ttf
             \li SourceCodePro-Bold.ttf
+            \li SourceCodePro-BoldIt.ttf
+            \li SourceCodePro-It.ttf
+            \li SourceCodePro-Medium.ttf
+            \li SourceCodePro-MediumIt.ttf
+            \li SourceCodePro-Regular.ttf
         \endlist
 
         \badcode

src/plugins/texteditor/fontsettings.cpp

@@ -32,6 +32,8 @@ const char schemeFileNamesKey[] = "ColorSchemes";
 
 const bool DEFAULT_ANTIALIAS = true;
 
+const char g_sourceCodePro[] = "Source Code Pro";
+
 namespace TextEditor {
 
 // -- FontSettings
@@ -172,7 +174,7 @@ QTextCharFormat FontSettings::toTextCharFormat(TextStyle category) const
         tf.setBackground(QColor());
     }
 
-    tf.setFontWeight(f.bold() ? QFont::Bold : QFont::Normal);
+    tf.setFontWeight(f.bold() ? QFont::Bold : fontNormalWeight());
     tf.setFontItalic(f.italic());
 
     tf.setUnderlineColor(f.underlineColor());
@@ -218,6 +220,7 @@ QBrush mixBrush(const QBrush &original, double relativeSaturation, double relati
 void FontSettings::addMixinStyle(QTextCharFormat &textCharFormat,
                                  const MixinTextStyles &mixinStyles) const
 {
+    const int normalWeight = fontNormalWeight();
     for (TextStyle mixinStyle : mixinStyles) {
         const Format &format = m_scheme.formatFor(mixinStyle);
 
@@ -242,8 +245,8 @@ void FontSettings::addMixinStyle(QTextCharFormat &textCharFormat,
         if (!textCharFormat.fontItalic())
             textCharFormat.setFontItalic(format.italic());
 
-        if (textCharFormat.fontWeight() == QFont::Normal)
+        if (textCharFormat.fontWeight() == normalWeight)
-            textCharFormat.setFontWeight(format.bold() ? QFont::Bold : QFont::Normal);
+            textCharFormat.setFontWeight(format.bold() ? QFont::Bold : normalWeight);
 
         if (textCharFormat.underlineStyle() == QTextCharFormat::NoUnderline) {
             textCharFormat.setUnderlineStyle(format.underlineStyle());
@@ -356,6 +359,15 @@ QFont FontSettings::font() const
     return f;
 }
 
+int FontSettings::fontNormalWeight() const
+{
+    // TODO: Fix this when we upgrade "Source Code Pro" to a version greater than 2.0.30
+    int weight = QFont::Normal;
+    if (Utils::HostOsInfo::isMacHost() && m_family == g_sourceCodePro)
+        weight = QFont::Medium;
+    return weight;
+}
+
 /**
  * Returns the configured antialiasing behavior.
  */
@@ -477,7 +489,7 @@ static QString defaultFontFamily()
     if (Utils::HostOsInfo::isMacHost())
         return QLatin1String("Monaco");
 
-    const QString sourceCodePro("Source Code Pro");
+    const QString sourceCodePro(g_sourceCodePro);
     const QFontDatabase dataBase;
     if (dataBase.hasFamily(sourceCodePro))
         return sourceCodePro;

src/plugins/texteditor/fontsettings.h

@@ -61,6 +61,7 @@ public:
     void setRelativeLineSpacing(int relativeLineSpacing);
 
     QFont font() const;
+    int fontNormalWeight() const;
 
     bool antialias() const;
     void setAntialias(bool antialias);