1 files changed, 34 insertions, 12 deletions

diff --git a/apt-private/private-output.h b/apt-private/private-output.h
index c3e73d5..4cc7c01 100644
--- a/apt-private/private-output.h
+++ b/apt-private/private-output.h
@@ -10,6 +10,7 @@
 #include <functional>
 #include <iostream>
 #include <string>
+#include <vector>
 
 // forward declaration
 class pkgCacheFile;
@@ -35,16 +36,24 @@ void ListSingleVersion(pkgCacheFile &CacheFile, pkgRecords &records,
 APT_PUBLIC void ShowBroken(std::ostream &out, CacheFile &Cache, bool const Now);
 APT_PUBLIC void ShowBroken(std::ostream &out, pkgCacheFile &Cache, bool const Now);
 
+APT_PUBLIC void ShowWithColumns(std::ostream &out, const std::vector<std::string> &List, size_t Indent, size_t ScreenWidth);
+
 template<class Container, class PredicateC, class DisplayP, class DisplayV> bool ShowList(std::ostream &out, std::string const &Title,
       Container const &cont,
       PredicateC Predicate,
       DisplayP PkgDisplay,
-      DisplayV VerboseDisplay)
+      DisplayV VerboseDisplay,
+      std::string colorName = "APT::Color::Neutral")
 {
    size_t const ScreenWidth = (::ScreenWidth > 3) ? ::ScreenWidth - 3 : 0;
    int ScreenUsed = 0;
    bool const ShowVersions = _config->FindB("APT::Get::Show-Versions", false);
+   bool const ListColumns = _config->FindB("APT::Get::List-Columns", _config->FindI("APT::Output-Version") >= 30);
    bool printedTitle = false;
+   std::vector<std::string> PackageList;
+
+   auto setColor = _config->FindI("APT::Output-Version") >= 30 ? _config->Find(colorName) : "";
+   auto resetColor = _config->FindI("APT::Output-Version") >= 30 ? _config->Find("APT::Color::Neutral") : "";
 
    for (auto const &Pkg: cont)
    {
@@ -59,7 +68,7 @@ template<class Container, class PredicateC, class DisplayP, class DisplayV> bool
 
       if (ShowVersions == true)
       {
-	 out << std::endl << "   " << PkgDisplay(Pkg);
+	 out << std::endl << "   " << setColor << PkgDisplay(Pkg) << resetColor;
 	 std::string const verbose = VerboseDisplay(Pkg);
 	 if (verbose.empty() == false)
 	    out << " (" << verbose << ")";
@@ -67,24 +76,37 @@ template<class Container, class PredicateC, class DisplayP, class DisplayV> bool
       else
       {
 	 std::string const PkgName = PkgDisplay(Pkg);
-	 if (ScreenUsed == 0 || (ScreenUsed + PkgName.length()) >= ScreenWidth)
+	 if (ListColumns)
+	    PackageList.push_back(PkgName);
+	 else
 	 {
-	    out << std::endl << "  ";
-	    ScreenUsed = 0;
+	    if (ScreenUsed == 0 || (ScreenUsed + PkgName.length()) >= ScreenWidth)
+	    {
+	       out << std::endl
+		   << "  ";
+	       ScreenUsed = 0;
+	    }
+	    else if (ScreenUsed != 0)
+	    {
+	       out << " ";
+	       ++ScreenUsed;
+	    }
+	    out << setColor << PkgName << resetColor;
+	    ScreenUsed += PkgName.length();
 	 }
-	 else if (ScreenUsed != 0)
-	 {
-	    out << " ";
-	    ++ScreenUsed;
-	 }
-	 out << PkgName;
-	 ScreenUsed += PkgName.length();
       }
    }
 
    if (printedTitle == true)
    {
       out << std::endl;
+      if (ListColumns && not PackageList.empty()) {
+	 out << setColor;
+	 ShowWithColumns(out, PackageList, 2, ScreenWidth);
+	 out << resetColor;
+      }
+      if (_config->FindI("APT::Output-Version") >= 30)
+	 out << std::endl;
       return false;
    }
    return true;