-;;; Functions to convert the selection into various other selection types.
-;;; Every selection type that emacs handles is implemented this way, except
-;;; for TIMESTAMP, which is a special case.
-
-(defun xselect-convert-to-text (selection type value)
- (cond ((stringp value)
- value)
- ((extentp value)
- (save-excursion
- (set-buffer (extent-object value))
- (save-restriction
- (widen)
- (buffer-substring (extent-start-position value)
- (extent-end-position value)))))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (or (eq (marker-buffer (car value)) (marker-buffer (cdr value)))
- (signal 'error
- (list "markers must be in the same buffer"
- (car value) (cdr value))))
- (save-excursion
- (set-buffer (or (marker-buffer (car value))
- (error "selection is in a killed buffer")))
- (save-restriction
- (widen)
- (buffer-substring (car value) (cdr value)))))
- (t nil)))
-
-(defun xselect-convert-to-string (selection type value)
- (let ((outval (xselect-convert-to-text selection type value)))
- ;; force the string to be not in Compound Text format.
- (if (stringp outval)
- (cons 'STRING outval)
- outval)))
-
-(defun xselect-convert-to-compound-text (selection type value)
- ;; converts to compound text automatically
- (xselect-convert-to-text selection type value))
-
-(defun xselect-convert-to-length (selection type value)
- (let ((value
- (cond ((stringp value)
- (length value))
- ((extentp value)
- (extent-length value))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (or (eq (marker-buffer (car value))
- (marker-buffer (cdr value)))
- (signal 'error
- (list "markers must be in the same buffer"
- (car value) (cdr value))))
- (abs (- (car value) (cdr value)))))))
- (if value ; force it to be in 32-bit format.
- (cons (ash value -16) (logand value 65535))
- nil)))
-
-(defun xselect-convert-to-targets (selection type value)
- ;; return a vector of atoms, but remove duplicates first.
- (let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist)))
- (rest all))
- (while rest
- (cond ((memq (car rest) (cdr rest))
- (setcdr rest (delq (car rest) (cdr rest))))
- ((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
- (setcdr rest (cdr (cdr rest))))
- (t
- (setq rest (cdr rest)))))
- (apply 'vector all)))
-
-(defun xselect-convert-to-delete (selection type value)
- (x-disown-selection-internal selection)
- ;; A return value of nil means that we do not know how to do this conversion,
- ;; and replies with an "error". A return value of NULL means that we have
- ;; done the conversion (and any side-effects) but have no value to return.
- 'NULL)
-
-(defun xselect-convert-to-filename (selection type value)
- (cond ((extentp value)
- (buffer-file-name (or (extent-object value)
- (error "selection is in a killed buffer"))))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (buffer-file-name (or (marker-buffer (car value))
- (error "selection is in a killed buffer"))))
- (t nil)))
-
-(defun xselect-convert-to-charpos (selection type value)
- (let (a b tmp)
- (cond ((cond ((extentp value)
- (setq a (extent-start-position value)
- b (extent-end-position value)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (car value)
- b (cdr value))))
- (setq a (1- a) b (1- b)) ; zero-based
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
-(defun xselect-convert-to-lineno (selection type value)
- (let (a b buf tmp)
- (cond ((cond ((extentp value)
- (setq buf (extent-object value)
- a (extent-start-position value)
- b (extent-end-position value)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (marker-position (car value))
- b (marker-position (cdr value))
- buf (marker-buffer (car value)))))
- (save-excursion
- (set-buffer buf)
- (save-restriction
- (widen)
- (goto-char a)
- (beginning-of-line)
- (setq a (1+ (count-lines 1 (point))))
- (goto-char b)
- (beginning-of-line)
- (setq b (1+ (count-lines 1 (point))))))
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
-(defun xselect-convert-to-colno (selection type value)
- (let (a b buf tmp)
- (cond ((cond ((extentp value)
- (setq buf (extent-object value)
- a (extent-start-position value)
- b (extent-end-position value)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (car value)
- b (cdr value)
- buf (marker-buffer a))))
- (save-excursion
- (set-buffer buf)
- (goto-char a)
- (setq a (current-column))
- (goto-char b)
- (setq b (current-column)))
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
-(defun xselect-convert-to-sourceloc (selection type value)
- (let (a b buf file-name tmp)
- (cond ((cond ((extentp value)
- (setq buf (or (extent-object value)
- (error "selection is in a killed buffer"))
- a (extent-start-position value)
- b (extent-end-position value)
- file-name (buffer-file-name buf)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (marker-position (car value))
- b (marker-position (cdr value))
- buf (or (marker-buffer (car value))
- (error "selection is in a killed buffer"))
- file-name (buffer-file-name buf))))
- (save-excursion
- (set-buffer buf)
- (save-restriction
- (widen)
- (goto-char a)
- (beginning-of-line)
- (setq a (1+ (count-lines 1 (point))))
- (goto-char b)
- (beginning-of-line)
- (setq b (1+ (count-lines 1 (point))))))
- (if (< b a) (setq tmp a a b b tmp))
- (format "%s:%d" file-name a)))))
-
-(defun xselect-convert-to-os (selection type size)
- (symbol-name system-type))
-
-(defun xselect-convert-to-host (selection type size)
- (system-name))
-
-(defun xselect-convert-to-user (selection type size)
- (user-full-name))
-
-(defun xselect-convert-to-class (selection type size)
- x-emacs-application-class)
-
-;; We do not try to determine the name Emacs was invoked with,
-;; because it is not clean for a program's behavior to depend on that.
-(defun xselect-convert-to-name (selection type size)
- ;invocation-name
- "xemacs")
-
-(defun xselect-convert-to-integer (selection type value)
- (and (integerp value)
- (cons (ash value -16) (logand value 65535))))
-
-(defun xselect-convert-to-atom (selection type value)
- (and (symbolp value) value))
-
-(defun xselect-convert-to-identity (selection type value) ; used internally
- (vector value))
-
-(setq selection-converter-alist
- '((TEXT . xselect-convert-to-text)
- (STRING . xselect-convert-to-string)
- (COMPOUND_TEXT . xselect-convert-to-compound-text)
- (TARGETS . xselect-convert-to-targets)
- (LENGTH . xselect-convert-to-length)
- (DELETE . xselect-convert-to-delete)
- (FILE_NAME . xselect-convert-to-filename)
- (CHARACTER_POSITION . xselect-convert-to-charpos)
- (SOURCE_LOC . xselect-convert-to-sourceloc)
- (LINE_NUMBER . xselect-convert-to-lineno)
- (COLUMN_NUMBER . xselect-convert-to-colno)
- (OWNER_OS . xselect-convert-to-os)
- (HOST_NAME . xselect-convert-to-host)
- (USER . xselect-convert-to-user)
- (CLASS . xselect-convert-to-class)
- (NAME . xselect-convert-to-name)
- (ATOM . xselect-convert-to-atom)
- (INTEGER . xselect-convert-to-integer)
- (_EMACS_INTERNAL . xselect-convert-to-identity)
- ))
-