From e19556263c3c62b6a24b920a102aed5523e166a0 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Sat, 24 Aug 2024 19:20:39 -0400
Subject: [PATCH] provide syntax highlighting color schemes for light and dark
 themes

---
 tools/lammps-gui/highlighter.cpp | 68 ++++++++++++++++++++++----------
 tools/lammps-gui/lammpsgui.cpp   |  6 ++-
 2 files changed, 53 insertions(+), 21 deletions(-)

diff --git a/tools/lammps-gui/highlighter.cpp b/tools/lammps-gui/highlighter.cpp
index 3f79c7a73e..9846011836 100644
--- a/tools/lammps-gui/highlighter.cpp
+++ b/tools/lammps-gui/highlighter.cpp
@@ -12,6 +12,7 @@
 ------------------------------------------------------------------------- */
 
 #include "highlighter.h"
+#include "helpers.h"
 
 Highlighter::Highlighter(QTextDocument *parent) :
     QSyntaxHighlighter(parent),
@@ -54,27 +55,54 @@ Highlighter::Highlighter(QTextDocument *parent) :
     isTriple(QStringLiteral("[^\"]*\"\"\"[^\"]*")),
     isString(QStringLiteral("(\".+?\"|'.+?'|\"\"\".*\"\"\")")), in_triple(false)
 {
-    formatNumber.setForeground(Qt::blue);
-    formatString.setForeground(Qt::darkGreen);
-    formatString.setFontWeight(QFont::Normal);
-    formatComment.setForeground(Qt::red);
-    formatSpecial.setForeground(Qt::darkMagenta);
-    formatSpecial.setFontWeight(QFont::Bold);
-    formatParticle.setForeground(Qt::darkRed);
-    formatParticle.setFontWeight(QFont::Bold);
-    formatRun.setForeground(Qt::darkBlue);
-    formatRun.setFontWeight(QFont::Bold);
-    formatVariable.setForeground(Qt::darkGray);
-    formatVariable.setFontWeight(QFont::Bold);
+    if (is_light_theme()) {
+        // syntax colors for light themes
+        formatNumber.setForeground(Qt::blue);
+        formatString.setForeground(Qt::darkGreen);
+        formatString.setFontWeight(QFont::Normal);
+        formatComment.setForeground(Qt::red);
+        formatSpecial.setForeground(Qt::darkMagenta);
+        formatSpecial.setFontWeight(QFont::Bold);
+        formatParticle.setForeground(Qt::darkRed);
+        formatParticle.setFontWeight(QFont::Bold);
+        formatRun.setForeground(Qt::darkBlue);
+        formatRun.setFontWeight(QFont::Bold);
+        formatVariable.setForeground(Qt::darkGray);
+        formatVariable.setFontWeight(QFont::Bold);
 
-    formatOutput.setForeground(Qt::darkYellow);
-    formatOutput.setFontWeight(QFont::Bold);
-    formatRead.setForeground(Qt::magenta);
-    formatRead.setFontWeight(QFont::Bold);
-    formatLattice.setForeground(Qt::darkGreen);
-    formatLattice.setFontWeight(QFont::Bold);
-    formatSetup.setForeground(Qt::darkCyan);
-    formatSetup.setFontWeight(QFont::Bold);
+        formatOutput.setForeground(Qt::darkYellow);
+        formatOutput.setFontWeight(QFont::Bold);
+        formatRead.setForeground(Qt::magenta);
+        formatRead.setFontWeight(QFont::Bold);
+        formatLattice.setForeground(Qt::darkGreen);
+        formatLattice.setFontWeight(QFont::Bold);
+        formatSetup.setForeground(Qt::darkCyan);
+        formatSetup.setFontWeight(QFont::Bold);
+    } else {
+        // syntax colors for dark themes
+        formatNumber.setForeground(QColorConstants::Svg::dodgerblue);
+        formatString.setForeground(QColorConstants::Green);
+        formatString.setFontWeight(QFont::Normal);
+        formatComment.setForeground(QColorConstants::Red);
+        formatComment.setFontWeight(QFont::Bold);
+        formatSpecial.setForeground(QColorConstants::Magenta);
+        formatSpecial.setFontWeight(QFont::Bold);
+        formatParticle.setForeground(QColorConstants::Svg::indianred);
+        formatParticle.setFontWeight(QFont::Bold);
+        formatRun.setForeground(QColorConstants::Svg::lightskyblue);
+        formatRun.setFontWeight(QFont::Bold);
+        formatVariable.setForeground(QColorConstants::Svg::lightgray);
+        formatVariable.setFontWeight(QFont::Bold);
+
+        formatOutput.setForeground(QColorConstants::Yellow);
+        formatOutput.setFontWeight(QFont::Bold);
+        formatRead.setForeground(QColorConstants::Svg::lightcoral);
+        formatRead.setFontWeight(QFont::Bold);
+        formatLattice.setForeground(QColorConstants::Svg::lightgreen);
+        formatLattice.setFontWeight(QFont::Bold);
+        formatSetup.setForeground(QColorConstants::Cyan);
+        formatSetup.setFontWeight(QFont::Bold);
+    }
 }
 
 void Highlighter::highlightBlock(const QString &text)
diff --git a/tools/lammps-gui/lammpsgui.cpp b/tools/lammps-gui/lammpsgui.cpp
index 362a8f00cb..d75f97da7a 100644
--- a/tools/lammps-gui/lammpsgui.cpp
+++ b/tools/lammps-gui/lammpsgui.cpp
@@ -1431,7 +1431,11 @@ void LammpsGui::setFont(const QFont &newfont)
 void LammpsGui::about()
 {
     std::string version = "This is LAMMPS-GUI version " LAMMPS_GUI_VERSION;
-    version += " using Qt version " QT_VERSION_STR "\n";
+    version += " using Qt version " QT_VERSION_STR;
+    if (is_light_theme())
+        version += " using light theme\n";
+    else
+        version += " using dark theme\n";
     if (lammps.has_plugin()) {
         version += "LAMMPS library loaded as plugin";
         if (!plugin_path.empty()) {