Implement #6096

builtin/settingtypes.txt

@@ -634,6 +634,9 @@ crosshair_color (Crosshair color) string (255,255,255)
 #    Crosshair alpha (opaqueness, between 0 and 255).
 crosshair_alpha (Crosshair alpha) int 255 0 255
 
+#    Maximum number of recent chat items to show
+recent_chat_size (Recent Chat Messages) int 6 3 99
+
 #    Whether node texture animations should be desynchronized per mapblock.
 desynchronize_mapblock_texture_animation (Desynchronize block animation) bool true
 

src/chat.cpp

@@ -369,6 +369,13 @@ s32 ChatBuffer::getBottomScrollPos() const
 	return formatted_count - rows;
 }
 
+void ChatBuffer::resize(u32 scrollback) {
+	m_scrollback = scrollback;
+	if (m_unformatted.size() > m_scrollback)
+	{
+		deleteOldest(m_unformatted.size() - m_scrollback);
+	}	
+}
 
 
 ChatPrompt::ChatPrompt(const std::wstring &prompt, u32 history_limit):
@@ -731,6 +738,11 @@ void ChatBackend::clearRecentChat()
 	m_recent_buffer.clear();
 }
 
+
+void ChatBackend::applySettings(Settings* settings) {
+	m_recent_buffer.resize(settings->getU32("recent_chat_size"));
+}
+
 void ChatBackend::step(float dtime)
 {
 	m_recent_buffer.step(dtime);

src/chat.h

@@ -25,6 +25,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "irrlichttypes.h"
 #include "util/enriched_string.h"
+#include "settings.h"
 
 // Chat console related classes
 
@@ -118,6 +119,7 @@ public:
 	u32 formatChatLine(const ChatLine& line, u32 cols,
 			std::vector<ChatFormattedLine>& destination) const;
 
+    void resize(u32 scrollback);
 protected:
 	s32 getTopScrollPos() const;
 	s32 getBottomScrollPos() const;
@@ -281,6 +283,9 @@ public:
 	void scrollPageDown();
 	void scrollPageUp();
 
+    // Resize recent buffer based on settings
+    void applySettings(Settings* settings);
+    
 private:
 	ChatBuffer m_console_buffer;
 	ChatBuffer m_recent_buffer;

src/defaultsettings.cpp

@@ -190,6 +190,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("node_highlighting", "box");
 	settings->setDefault("crosshair_color", "(255,255,255)");
 	settings->setDefault("crosshair_alpha", "255");
+	settings->setDefault("recent_chat_size", "6");
 	settings->setDefault("hud_scaling", "1.0");
 	settings->setDefault("gui_scaling", "1.0");
 	settings->setDefault("gui_scaling_filter", "false");

src/game.cpp

@@ -2051,6 +2051,9 @@ bool Game::initGui()
 	// Remove stale "recent" chat messages from previous connections
 	chat_backend->clearRecentChat();
 
+    // Make sure the size of the recent messages buffer is right
+    chat_backend->applySettings(g_settings);
+    
 	// Chat backend and console
 	gui_chat_console = new GUIChatConsole(guienv, guienv->getRootGUIElement(),
 			-1, chat_backend, client, &g_menumgr);