editor: Make Recent Files limit customizable and increase default to 10

data/advanced_preferences.cfg

@@ -188,6 +188,17 @@
     default=no
 [/advanced_preference]
 
+[advanced_preference]
+    field=editor_max_recent_files
+    name= _ "Editor recent files limit"
+    description= _ "The maximum number of items to display on the Recent Files menu in the editor"
+    type=int
+    default=10
+    min=1
+    max=64
+    step=1
+[/advanced_preference]
+
 #ifndef APPLE
 [advanced_preference]
     field=color_cursors

src/editor/editor_preferences.cpp

@@ -98,8 +98,11 @@ namespace editor {
 	}
 
 	namespace {
-		// TODO: make user-customizable in Advanced Preferences.
-		const size_t MAX_RECENT_FILES = 6;
+		size_t editor_mru_limit()
+		{
+			return std::max(size_t(1), lexical_cast_default<size_t>(
+					preferences::get("editor_max_recent_files"), 10));
+		}
 
 		//
 		// NOTE: The MRU read/save functions enforce the entry count limit in
@@ -124,7 +127,7 @@ namespace editor {
 				}
 			}
 
-			mru.resize(std::min(MAX_RECENT_FILES, mru.size()));
+			mru.resize(std::min(editor_mru_limit(), mru.size()));
 
 			return mru;
 		}
@@ -143,7 +146,7 @@ namespace editor {
 				config& child = cfg.add_child("entry");
 				child["path"] = entry;
 
-				if(++n >= MAX_RECENT_FILES) {
+				if(++n >= editor_mru_limit()) {
 					break;
 				}
 			}
@@ -170,7 +173,7 @@ namespace editor {
 		mru.erase(std::remove(mru.begin(), mru.end(), path), mru.end());
 
 		mru.insert(mru.begin(), path);
-		mru.resize(std::min(MAX_RECENT_FILES, mru.size()));
+		mru.resize(std::min(editor_mru_limit(), mru.size()));
 
 		do_commit_editor_mru(mru);
 	}