Increase maximum recent files on VLC

vlc_recent_files.patch

# Increase maximum recent files on VLC, by Theldus
#
# First of all, this is not an official patch!, apply at your
# own risk, nonetheless, it should be safe =).
#
# Second of all, it's so much easy to increase this limit, why on earth VLC
# uses a hardcoded number? 10 at the moment. VLC already saves more than 10
# items on the ~/.config/vlc/vlc-qt-interface.conf, so why not makes use of
# such thing? I really dont know. Anyway, apply this and be happy.
#
# Tested on:
# * Ubuntu 18.04.3 LTS
# * VLC 3.0.8 Vetinari
#   -> http://download.videolan.org/pub/videolan/vlc/3.0.8/vlc-3.0.8.tar.xz
# (not tested on others environments/versions)
#
# Build instructions:
# 
# All the following instructions were adapted/grabbed from:
#   -> https://techpiezo.com/linux/install-vlc-media-player-in-ubuntu/
#
# Ubuntu dependencies:
#   sudo apt-get install git build-essential 
#   sudo apt-get install pkg-config libtool automake 
#   sudo apt-get install autopoint gettext
#
#   sudo apt-get install libxcb-shm0-dev libxcb-xv0-dev 
#   sudo apt-get install libxcb-keysyms1-dev libxcb-randr0-dev 
#   sudo apt-get install libxcb-composite0-dev
#
#   sudo apt-get --no-install-recommends build-dep vlc
#
# Build:
#   cd vlc-3.0.8/
#   patch -p1 < ../vlc_recent_files.patch
#   ./configure
#   time make -j$(nproc)
#
# And enjoy =)
#   export VLC_RECENT_MAX=<amount-you-want>
#   ./vlc
#
# Add VLC_RECENT_MAX=<amount> on your /etc/environment to become system-wide
#
diff -ruN vlc-3.0.8-orig/modules/gui/qt/menus.cpp vlc-3.0.8/modules/gui/qt/menus.cpp
--- vlc-3.0.8-orig/modules/gui/qt/menus.cpp	2018-07-05 05:53:54.000000000 -0300
+++ vlc-3.0.8/modules/gui/qt/menus.cpp	2020-10-20 14:17:23.563628598 -0300
@@ -1591,7 +1591,7 @@
         }
         else
         {
-            for( int i = 0; i < __MIN( l.count(), 10) ; ++i )
+            for( int i = 0; i < __MIN( l.count(), rmrl->maxRecents()) ; ++i )
             {
                 QString mrl = l.at( i );
                 char *psz = vlc_uri_decode_duplicate( qtu( mrl ) );
diff -ruN vlc-3.0.8-orig/modules/gui/qt/recents.cpp vlc-3.0.8/modules/gui/qt/recents.cpp
--- vlc-3.0.8-orig/modules/gui/qt/recents.cpp	2017-11-24 13:29:17.000000000 -0200
+++ vlc-3.0.8/modules/gui/qt/recents.cpp	2020-10-20 14:24:45.491644458 -0300
@@ -81,6 +81,22 @@
     delete filter;
 }
 
+int RecentsMRL::maxRecents()
+{
+    int recent_max = 10;
+
+    // Try to read the recent-max parameter, if not exist, create one.
+    const char *rmax = getenv( "VLC_RECENT_MAX" );
+    if ( rmax != NULL )
+    {
+        // I know I know, atoi is not safe and blah blah, this is just
+        // a quick hack, don't take this too much serious, =).
+        recent_max = atoi( rmax );
+    }
+
+    return recent_max;
+}
+
 void RecentsMRL::addRecent( const QString &mrl )
 {
     if ( !isActive || ( filter && filter->indexIn( mrl ) >= 0 ) )
@@ -109,7 +125,7 @@
     {
         recents.prepend( mrl );
         times.prepend( "-1" );
-        if( recents.count() > RECENTS_LIST_SIZE ) {
+        if( recents.count() > maxRecents() ) {
             recents.takeLast();
             times.takeLast();
         }
diff -ruN vlc-3.0.8-orig/modules/gui/qt/recents.hpp vlc-3.0.8/modules/gui/qt/recents.hpp
--- vlc-3.0.8-orig/modules/gui/qt/recents.hpp	2017-11-24 13:29:17.000000000 -0200
+++ vlc-3.0.8/modules/gui/qt/recents.hpp	2020-10-20 14:11:42.647616364 -0300
@@ -33,8 +33,6 @@
 class QRegExp;
 class QSignalMapper;
 
-#define RECENTS_LIST_SIZE 30
-
 class Open
 {
 public:
@@ -57,6 +55,8 @@
     friend class Singleton<RecentsMRL>;
 
 public:
+    int maxRecents();
+
     void addRecent( const QString & );
     QStringList recentList();
     QSignalMapper *signalMapper;