From a46da4ee164ea5fbbee812a7cde548c00161e5f2 Mon Sep 17 00:00:00 2001
From: Sen66 <me@sen66.dev>
Date: Thu, 5 Mar 2026 12:46:55 +0100
Subject: [PATCH] fix: horizontal scrollbar calculations for C/C++ view

- added msvc define NOMINMAX so we can use std::max
---
 msvc/Reclass.vcxproj |  2 ++
 src/main.cpp         | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/msvc/Reclass.vcxproj b/msvc/Reclass.vcxproj
index 9edf950..3c78416 100644
--- a/msvc/Reclass.vcxproj
+++ b/msvc/Reclass.vcxproj
@@ -66,6 +66,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <AdditionalIncludeDirectories>..\third_party\fadec\;..\third_party\raw_pdb\src\;..\third_party\qscintilla\src\;..\src\</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NOMINMAX;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <AdditionalDependencies>dwmapi.lib;dbghelp.lib;%(AdditionalDependencies)</AdditionalDependencies>
@@ -80,6 +81,7 @@
     </Link>
     <ClCompile>
       <AdditionalIncludeDirectories>..\third_party\fadec\;..\third_party\raw_pdb\src\;..\third_party\qscintilla\src\;..\src\</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NOMINMAX;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <PostBuildEvent>
       <Command>$(QtToolsPath)/windeployqt $(SolutionDir)$(Platform)\$(Configuration)\$(ProjectName).exe</Command>
diff --git a/src/main.cpp b/src/main.cpp
index 3260885..14092e0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2263,6 +2263,21 @@ void MainWindow::updateRenderedView(TabState& tab, SplitPane& pane) {
     // Set text
     pane.rendered->setText(text);
 
+    // Set horizontal scroll width to match the longest line (ignoring trailing spaces)
+    {
+        int maxLen = 0;
+        const QStringList lines = text.split(QChar('\n'));
+        for (const auto& line : lines) {
+            int len = (int)line.size();
+            while (len > 0 && line[len - 1] == QChar(' ')) --len;
+            maxLen = std::max(maxLen, len);
+        }
+        QFontMetrics fm(pane.rendered->font());
+        int pixelWidth = fm.horizontalAdvance(QString(maxLen, QChar('0')));
+        pane.rendered->SendScintilla(QsciScintillaBase::SCI_SETSCROLLWIDTH,
+                                     (unsigned long)qMax(1, pixelWidth));
+    }
+
     // Update margin width for line count
     int lineCount = pane.rendered->lines();
     QString marginStr = QString(QString::number(lineCount).size() + 2, '0');