new: a command to clear on-screen chat messages

CHANGELOG.md

@@ -94,6 +94,7 @@ Engine
   * Liquids drop torches and plants
 
 #### Client
+  * Clearing on-screen chat by invoking the /clear command
   * Fixed some input issues: not working numpad and some keys in azerty layout
   * Chat forms were replaced with console (opens up to 10% height of the screen)
   * Default keymap for console changed to tilde (~)

src/client.cpp

@@ -67,6 +67,7 @@ along with Freeminer.  If not, see <http://www.gnu.org/licenses/>.
 #if !MINETEST_PROTO
 #include "network/fm_clientpacketsender.cpp"
 #endif
+#include "chat.h"
 
 
 extern gui::IGUIEnvironment* guienv;
@@ -1632,15 +1633,18 @@ void Client::typeChatMessage(const std::string &message)
 	if(message.empty())
 		return;
 
-	// Send to others
-	sendChatMessage(message);
-
-	// Show locally
-	if (message[0] == '/')
-	{
-		m_chat_queue.push("issued command: " + message);
+	if (message[0] == '/') {
+		// TODO register client commands in help
+		std::string command = message.substr(1,-1);
+		// Clears on-screen chat messages
+		if (command.compare("clear") == 0) {
+			chat_backend->clearRecentChat();
+			return;
+		// it's kinda self-evident when you run a local command
+		} else {
+			m_chat_queue.push("issued command: " + message);
+		}
 	}
-
 	//freeminer display self message after recieving from server
 #if MINETEST_PROTO
 	else
@@ -1651,6 +1655,9 @@ void Client::typeChatMessage(const std::string &message)
 		m_chat_queue.push(std::string() + "<" + name + "> " + message);
 	}
 #endif
+
+	// Send to others
+	sendChatMessage(message);
 }
 
 void Client::addUpdateMeshTask(v3s16 p, bool urgent, int step)

src/client.h

@@ -59,6 +59,7 @@ class Database;
 class Server;
 class Mapper;
 struct MinimapMapblock;
+class ChatBackend;
 
 /*
 struct QueuedMeshUpdate
@@ -546,6 +547,8 @@ public:
 
 	void makeScreenshot(const std::string & name = "screenshot_", IrrlichtDevice *device = nullptr);
 	
+	ChatBackend *chat_backend;
+
 private:
 
 	// Virtual methods from con::PeerHandler

src/game.cpp

@@ -2373,6 +2373,7 @@ bool Game::connectToServer(const std::string &playername,
 	if (!client)
 		return false;
 
+	client->chat_backend = chat_backend;
 	gamedef = client;	// Client acts as our GameDef
 
 	infostream << "Connecting to server at ";