+
+;;; 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. These are
+;;; all moved from x-select.el
+
+(defun select-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 select-convert-to-string (selection type value)
+ (let ((outval (select-convert-to-text selection type value)))
+ ;; force the string to be not in Compound Text format.
+ (if (stringp outval)
+ (cons 'STRING outval)
+ outval)))
+
+(defun select-convert-to-compound-text (selection type value)
+ ;; converts to compound text automatically
+ (select-convert-to-text selection type value))
+
+(defun select-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 select-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 select-convert-to-delete (selection type value)
+ (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 select-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 select-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 select-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 select-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 select-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 select-convert-to-os (selection type size)
+ (symbol-name system-type))
+
+(defun select-convert-to-host (selection type size)
+ (system-name))
+
+(defun select-convert-to-user (selection type size)
+ (user-full-name))
+
+(defun select-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 select-convert-to-name (selection type size)
+ ;invocation-name
+ "xemacs")
+
+(defun select-convert-to-integer (selection type value)
+ (and (integerp value)
+ (cons (ash value -16) (logand value 65535))))
+
+(defun select-convert-to-atom (selection type value)
+ (and (symbolp value) value))
+
+(defun select-convert-to-identity (selection type value) ; used internally
+ (vector value))
+
+(setq selection-converter-alist
+ '((TEXT . select-convert-to-text)
+ (STRING . select-convert-to-string)
+ (COMPOUND_TEXT . select-convert-to-compound-text)
+ (TARGETS . select-convert-to-targets)
+ (LENGTH . select-convert-to-length)
+ (DELETE . select-convert-to-delete)
+ (FILE_NAME . select-convert-to-filename)
+ (CHARACTER_POSITION . select-convert-to-charpos)
+ (SOURCE_LOC . select-convert-to-sourceloc)
+ (LINE_NUMBER . select-convert-to-lineno)
+ (COLUMN_NUMBER . select-convert-to-colno)
+ (OWNER_OS . select-convert-to-os)
+ (HOST_NAME . select-convert-to-host)
+ (USER . select-convert-to-user)
+ (CLASS . select-convert-to-class)
+ (NAME . select-convert-to-name)
+ (ATOM . select-convert-to-atom)
+ (INTEGER . select-convert-to-integer)
+ (_EMACS_INTERNAL . select-convert-to-identity)
+ ))