Sometimes, your console application might need some of the additional features, such as VT color sequences, that might not be available to all of the terminal emulators installed on your system. In this case, Terminaux provides you with a wide assortment of console checkers to ease the process of checking the features.
Checking
There are various checkers you'll be able to use with Terminaux:
256 color support checker
For checking the size requirement, you'll need to consult the below page to get started:
Dumb console
Dumb consoles, in general, don't understand the concept of colors, positioning, erasing, and features other than writing to the console. However, some of them may be provided with basic color support and various other features that are simple.
The dumb console checker checks to see if we can call the CursorLeft property inside the exception handler. Usually, this property throws an IOException if it can't query the terminal for the cursor left position, but this happens when the console doesn't understand the concept of positioning, which happens on dumb consoles.
If the cursor position is queried, the checker queries the terminal type to check to see if it's one of dumb or unknown. These two terminal types are assumed to be dumb.
If checks pass, the console is not considered as dumb. This means that Terminaux is able to use the color features and all the other features.
General checker
The general console checker throws an exception if the checker found the terminal to be one of the "dumb" consoles. Then, it queries both the console blacklist and the greylist for both the emulator and the type.
If the blacklist checker raised some of the red flags by matching the console type or emulator, the general checker, CheckConsole(), throws an exception. If the greylist checker raised some of the red flags, the application shows a warning on the screen.
Registering console filters
The terminal type and emulator blacklist and greylist checkers contain adding and removing console regular expression patterns to/from the blacklist or the greylist. The following checkers are available:
TerminalEmulatorBlacklist
Each of these checkers contain a function for adding the query (AddToBlacklist and AddToGreylist), removing the query (RemoveFromBlacklist and RemoveFromGreylist), and checking the current console type or emulator (IsTypeBlacklisted and IsTypeGreylisted). These are the essential functions.
256-color support checker
This checker is a very simple checker, because it only queries the terminal type for a string containing -256col. Any terminal type that doesn't have this string is assumed to be not supporting 256-color feature, but that doesn't necessarily mean that the console doesn't support this feature, depending on your console application.
