Terminal control/Positional read: Difference between revisions
→{{header|TXR}}: Get the console window info to treat coordinates as physical, translated to virtual.
(→{{header|TXR}}: Added.) |
(→{{header|TXR}}: Get the console window info to treat coordinates as physical, translated to virtual.) |
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Line 169:
(typedef WCHAR wchar)
(typedef DWORD uint32)
(typedef WORD uint16)
(typedef SHORT short)
(typedef
(X SHORT)▼
(Y SHORT)))
(typedef SMALL_RECT
(struct SMALL_RECT
(Left SHORT)
(Top SHORT)
(Right SHORT)
(Bottom SHORT)))
(typedef CONSOLE_SCREEN_BUFFER_INFO
(struct CONSOLE_SCREEN_BUFFER_INFO
(dwSize COORD)
(dwCursorPosition COORD)
(wAttributes WORD)
(srWindow SMALL_RECT)
(dwMaximumWindowSize COORD)))
;;; Various constants
Line 187 ⟶ 205:
(with-dyn-lib "kernel32.dll"
(deffi GetStdHandle "GetStdHandle" HANDLE (DWORD))
(deffi GetConsoleScreenBufferInfo "GetConsoleScreenBufferInfo"
(deffi ReadConsoleOutputCharacter▼
▲ (deffi ReadConsoleOutputCharacter "ReadConsoleOutputCharacterW"
BOOL
DWORD▼
DWORD COORD (ptr-out (array 1
;;; Now the character at <2, 5> -- column 3, row 6.
Line 199 ⟶ 216:
(when (equal console-handle INVALID_HANDLE_VALUE)
(error "couldn't get console handle"))
(let* ((chars (vector 5))▼
(let* ((cinfo (new CONSOLE_SCREEN_BUFFER_INFO))
(getinfo-ok (GetConsoleScreenBufferInfo console-handle cinfo))
(coord (if getinfo-ok
^#S(COORD X ,(+ 2 cinfo.srWindow.Left)
(nread (vector 1))
(
1 coord
(unless getinfo-ok
(error "GetConsoleScreenBufferInfo failed"))
▲ #S(COORD X 2 Y 5)
(prinl cinfo)
(unless
(error "ReadConsoleOutputCharacter failed"))
(unless (plusp [nread 0])
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