196 lines
6.9 KiB
Scheme
196 lines
6.9 KiB
Scheme
(define-module (termenv screen)
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#:use-module (termenv)
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#:use-module (termenv color)
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#:export (reset
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set-foreground-color
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set-background-color
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set-cursor-color
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restore-screen
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save-screen
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alt-screen
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exit-alt-screen
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clear-screen
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move-cursor
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hide-cursor
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show-cursor
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save-cursor-position
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restore-cursor-position
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scroll-up
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scroll-down
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cursor-up
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cursor-down
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cursor-forward
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cursor-back
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cursor-next-line
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cursor-prev-line
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clear-line
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clear-line-left
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clear-line-right
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clear-lines
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change-scrolling-region
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insert-lines
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delete-lines
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set-window-title))
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(define %CURSOR-UP "~dA")
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(define %CURSOR-DOWN "~dB")
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(define %CURSOR-FORWARD "~dC")
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(define %CURSOR-BACK "~dD")
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(define %CURSOR-NEXT-LINE "~dE")
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(define %CURSOR-PREV-LINE "~dF")
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(define %HORIZONTAL "~dG")
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(define %CURSOR-POSITION "~d;~dH")
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(define %ERASE-DISPLAY "~dJ")
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(define %ERASE-LINE "~dK")
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(define %SCROLL-UP "~dS")
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(define %SCROLL-DOWN "~dT")
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(define %SAVE-CURSOR-POSITION "s")
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(define %RESTORE-CURSOR-POSITION "u")
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(define %CHANGE-SCROLLING-REGION "~d;~dr")
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(define %INSERT-LINE "~dL")
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(define %DELETE-LINE "~dM")
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(define %ERASE-LINE-RIGHT "0K")
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(define %ERASE-LINE-LEFT "1K")
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(define %ERASE-ENTIRE-LINE "2K")
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;; TODO mouse?
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(define %RESTORE-SCREEN "?47l")
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(define %SAVE-SCREEN "?47h")
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(define %ALT-SCREEN "?1049h")
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(define %EXIT-ALT-SCREEN "?1049l")
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;; TODO bracketed paste?
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(define %SET-WINDOW-TITLE (string-append "2;~a" %BEL))
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(define %SET-FOREGROUND-COLOR (string-append "10;~a" %BEL))
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(define %SET-BACKGROUND-COLOR (string-append "11;~a" %BEL))
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(define %SET-CURSOR-COLOR (string-append "12;~a" %BEL))
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(define %SHOW-CURSOR "?25h")
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(define %HIDE-CURSOR "?25l")
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(define* (reset #:optional (port #t))
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"Reset the terminal to its default style, removing any active styles"
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(format port (string-append %CSI "0m")))
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(define* (set-foreground-color hex #:optional (port #t))
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"Sets the default foreground color"
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(format port (string-append %OSC %SET-FOREGROUND-COLOR) (color-styled (make-foreground hex))))
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(define* (set-background-color hex #:optional (port #t))
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"Sets the default background color"
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(format port (string-append %OSC %SET-BACKGROUND-COLOR) (color-styled (make-background hex))))
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(define* (set-cursor-color hex #:optional (port #t))
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"Sets the cursor color"
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(format port (string-append %OSC %SET-CURSOR-COLOR) (color-styled (make-foreground hex))))
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(define* (restore-screen #:optional (port #t))
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"Restores a previously saved screen state"
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(format port (string-append %CSI %RESTORE-SCREEN)))
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(define* (save-screen #:optional (port #t))
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"Saves the screen state"
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(format port (string-append %CSI %SAVE-SCREEN)))
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(define* (alt-screen #:optional (port #t))
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"Switches to the alternate screen buffer. The former view can be restored with exit-alt-screen"
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(format port (string-append %CSI %ALT-SCREEN)))
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(define* (exit-alt-screen #:optional (port #t))
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"Exits the alternate screen buffer and returns to the former terminal window"
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(format port (string-append %CSI %EXIT-ALT-SCREEN)))
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(define* (clear-screen #:optional (port #t))
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"Clears the visible portion of the terminal"
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(format port (string-append %CSI %ERASE-DISPLAY) 2)
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(move-cursor port 1 1))
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(define* (scroll-up #:optional (amount 1) (port #t))
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(format port (string-append %CSI %SCROLL-UP) amount))
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(define* (scroll-down #:optional (amount 1) (port #t))
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(format port (string-append %CSI %SCROLL-DOWN) amount))
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(define* (move-cursor y x #:optional (port #t))
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"Moves the cursor to a given position"
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(format port (string-append %CSI %CURSOR-POSITION) y x))
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(define* (hide-cursor #:optional (port #t))
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"Hides the cursor"
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(format port (string-append %CSI %HIDE-CURSOR)))
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(define* (show-cursor #:optional (port #t))
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"Shows the cursor"
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(format port (string-append %CSI %SHOW-CURSOR)))
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(define* (save-cursor-position #:optional (port #t))
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"Saves the cursor position"
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(format port (string-append %CSI %SAVE-CURSOR-POSITION)))
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(define* (restore-cursor-position #:optional (port #t))
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"Restores a saved cursor position"
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(format port (string-append %CSI %RESTORE-CURSOR-POSITION)))
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(define* (cursor-up #:optional (distance 1) (port #t))
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"Moves the cursor up a given number of lines"
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(format port (string-append %CSI %CURSOR-UP) distance))
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(define* (cursor-down #:optional (distance 1) (port #t))
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"Moves the cursor down a given number of lines"
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(format port (string-append %CSI %CURSOR-DOWN) distance))
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(define* (cursor-forward #:optional (distance 1) (port #t))
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"Moves the cursor forward a given number of lines"
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(format port (string-append %CSI %CURSOR-FORWARD) distance))
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(define* (cursor-back #:optional (distance 1) (port #t))
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"Moves the cursor backwards a given number of lines"
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(format port (string-append %CSI %CURSOR-BACK) distance))
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(define* (cursor-next-line #:optional (distance 1) (port #t))
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"Moves the cursor down a given number of lines and places it at the beginning of the line"
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(format port (string-append %CSI %CURSOR-NEXT-LINE) distance))
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(define* (cursor-prev-line #:optional (distance 1) (port #t))
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"Moves the cursor up a given number of lines and places it at the beginning of the line"
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(format port (string-append %CSI %CURSOR-PREV-LINE) distance))
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(define* (clear-line #:optional (port #t))
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"Clears the current line"
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(format port (string-append %CSI %ERASE-ENTIRE-LINE)))
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(define* (clear-line-left #:optional (port #t))
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"Clears the line to the left of the cursor"
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(format port (string-append %CSI %ERASE-LINE-LEFT)))
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(define* (clear-line-right #:optional (port #t))
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"Clears the line to the right of the cursor"
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(format port (string-append %CSI %ERASE-LINE-RIGHT)))
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(define* (clear-lines n #:optional (port #t))
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"Clears a given number of lines"
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(define clear (format #f (string-append %CSI %ERASE-LINE) 2))
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(define up (format #f (string-append %CSI %CURSOR-UP) 1))
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(define l (make-list n (string-append up clear)))
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(format port (string-append clear (string-join l ""))))
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(define* (change-scrolling-region top bottom #:optional (port #t))
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"Sets the scrolling region of the terminal"
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(format port (string-append %CSI %CHANGE-SCROLLING-REGION) top bottom))
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(define* (insert-lines n #:optional (port #t))
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"Inserts the given number of lines at the top of the scrollable region, pushing lines below down"
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(format port (string-append %CSI %INSERT-LINE) n))
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(define* (delete-lines n #:optional (port #t))
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"Deletes the given number of lines, pulling any lines in the scrollable region below up"
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(format port (string-append %CSI %DELETE-LINE) n))
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(define* (set-window-title title #:optional (port #t))
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"Sets the terminal window title"
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(format port (string-append %OSC %SET-WINDOW-TITLE) title))
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