Bash - changing a color of a substring Post: 302597709

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Top Forums Shell Programming and Scripting Bash - changing a color of a substring Post 302597709 by xqwzts on Saturday 11th of February 2012 03:06:10 PM

02-11-2012

Registered User

Bash - changing a color of a substring

Hello!

I need to write a bash script for my university classes, and I came up with an idea of a program that would test the speed of typing - there is some random text that you have to rewrite, and the script measures time, number of mistakes etc. The text would be visible on the screen all the time, and I would like to dynamically refresh it and change the color of correctly written characters to green (or to red - for those which are wrong). This would require some way of manipulating a color of a single character in a string - is something like that even possible?

I was thinking about something like inserting $(tput setaf 1)/some_character/$(tput sgr0)" on a specified position of a string - let's say I have a string "abcd", and I want one of the characters (for example, the one on the position 2 - in this case it would be c) to be green. Can something like that be done?

I will be very grateful for any suggestions.
PS. Sorry for my English, if there are any mistakes.

xqwzts

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LEARN ABOUT SUSE

glcolormask

GLCOLORMASK(3G) 														   GLCOLORMASK(3G)

NAME

       glColorMask - enable and disable writing of frame buffer color components

C SPECIFICATION

       void glColorMask( GLboolean red,
			 GLboolean green,
			 GLboolean blue,
			 GLboolean alpha )

PARAMETERS

       red, green, blue, alpha
			     Specify  whether  red, green, blue, and alpha can or cannot be written into the frame buffer.  The initial values are
			     all GL_TRUE, indicating that the color components can be written.

DESCRIPTION

       glColorMask specifies whether the individual color components in the frame buffer can or cannot be written.  If red is GL_FALSE, for  exam-
       ple, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.

       Changes to individual bits of components cannot be controlled.  Rather, changes are either enabled or disabled for entire color components.

ERRORS

       GL_INVALID_OPERATION is generated if glColorMask is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

       glGet with argument GL_COLOR_WRITEMASK
       glGet with argument GL_RGBA_MODE

SEE ALSO

       glClear(3G), glColor(3G), glColorPointer(3G), glDepthMask(3G), glIndex(3G), glIndexPointer(3G), glIndexMask(3G), glStencilMask(3G)

																   GLCOLORMASK(3G)