Merge branch 'master' into jgrpp

# Conflicts:
#	.github/workflows/ci-build.yml
#	.github/workflows/release-linux.yml
#	.github/workflows/release-macos.yml
#	.github/workflows/release-source.yml
#	.github/workflows/release.yml
#	CMakeLists.txt
#	COMPILING.md
#	src/ai/ai_core.cpp
#	src/ai/ai_gui.cpp
#	src/bridge_gui.cpp
#	src/company_gui.cpp
#	src/console_cmds.cpp
#	src/core/CMakeLists.txt
#	src/core/smallmap_type.hpp
#	src/disaster_vehicle.h
#	src/effectvehicle_base.h
#	src/fontcache.cpp
#	src/game/game_core.cpp
#	src/game/game_gui.cpp
#	src/gamelog.cpp
#	src/gamelog_internal.h
#	src/group_gui.cpp
#	src/linkgraph/linkgraph.h
#	src/misc.cpp
#	src/network/core/config.h
#	src/network/core/udp.cpp
#	src/network/network_chat_gui.cpp
#	src/network/network_content_gui.cpp
#	src/network/network_gui.cpp
#	src/newgrf.cpp
#	src/newgrf_gui.cpp
#	src/newgrf_profiling.cpp
#	src/newgrf_profiling.h
#	src/object_gui.cpp
#	src/openttd.cpp
#	src/openttd.h
#	src/order_gui.cpp
#	src/os/windows/font_win32.cpp
#	src/rail_gui.cpp
#	src/road.cpp
#	src/road_gui.cpp
#	src/saveload/afterload.cpp
#	src/saveload/saveload.h
#	src/script/api/script_controller.cpp
#	src/script/api/script_roadtypelist.cpp
#	src/script/script_config.cpp
#	src/script/script_config.hpp
#	src/script/script_instance.cpp
#	src/script/script_scanner.cpp
#	src/script/squirrel.cpp
#	src/script/squirrel_helper.hpp
#	src/settings_gui.cpp
#	src/settings_internal.h
#	src/settings_type.h
#	src/table/settings/network_private_settings.ini
#	src/timetable_gui.cpp
#	src/vehicle.cpp
#	src/vehicle_base.h
#	src/window_gui.h

src/textfile_gui.cpp

@@ -371,8 +371,21 @@ static void Xunzip(byte **bufp, size_t *sizep)
 	if (StrStartsWith(sv_buf, u8"\ufeff")) sv_buf.remove_prefix(3);
 
 	/* Replace any invalid characters with a question-mark. This copies the buf in the process. */
-	this->text = StrMakeValid(sv_buf, SVS_REPLACE_WITH_QUESTION_MARK | SVS_ALLOW_NEWLINE | SVS_REPLACE_TAB_CR_NL_WITH_SPACE);
+	this->LoadText(sv_buf);
 	free(buf);
+}
+
+/**
+ * Load a text into the textfile viewer.
+ *
+ * This will split the text into newlines and stores it for fast drawing.
+ *
+ * @param buf The text to load.
+ */
+void TextfileWindow::LoadText(std::string_view buf)
+{
+	this->text = StrMakeValid(buf, SVS_REPLACE_WITH_QUESTION_MARK | SVS_ALLOW_NEWLINE | SVS_REPLACE_TAB_CR_NL_WITH_SPACE);
+	this->lines.clear();
 
 	/* Split the string on newlines. */
 	std::string_view p(this->text);
@@ -411,7 +424,7 @@ const char *GetTextfile(TextfileType type, Subdirectory dir, const char *filenam
 		"changelog",
 		"license",
 	};
-	static_assert(lengthof(prefixes) == TFT_END);
+	static_assert(lengthof(prefixes) == TFT_CONTENT_END);
 
 	const char *prefix = prefixes[type];