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(string-rectangle): Make operate-on-rectangle convert tabs.

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(string-rectangle-line): After inserting string, insert the same
width of whitespace that we deleted earlier.
(operate-on-rectangle): Operate even if width is 0.
(open-rectangle-line): Clean up.
This commit is contained in:
Richard M. Stallman 1994-02-05 02:19:28 +00:00
parent 9d721a9e79
commit bc8ea5430e
1 changed files with 38 additions and 33 deletions
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45
lisp/rect.el
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@ -51,7 +51,6 @@ Point is at the end of the segment of this line within the rectangle."
(setq endlinepos (point-marker)))
(if (< endcol startcol)
(setq startcol (prog1 endcol (setq endcol startcol))))
(if (/= endcol startcol)
(save-excursion
(goto-char startlinepos)
(while (< (point) endlinepos)
@ -65,7 +64,7 @@ Point is at the end of the segment of this line within the rectangle."
(setq endextra (+ endextra begextra)
begextra 0))
(funcall function startpos begextra endextra))
(forward-line 1))))
(forward-line 1)))
(- endcol startcol)))
(defun delete-rectangle-line (startdelpos ignore ignore)
@ -179,17 +178,19 @@ but instead winds up to the right of the rectangle."
(goto-char start))
(defun open-rectangle-line (startpos begextra endextra)
(let ((column (+ (current-column) begextra endextra)))
;; Column where rectangle ends.
(let ((endcol (+ (current-column) endextra))
whitewidth)
(goto-char startpos)
(let ((ocol (current-column)))
;; Column where rectangle begins.
(let ((begcol (- (current-column) begextra)))
(skip-chars-forward " \t")
(setq column (+ column (- (current-column) ocol))))
(delete-region (point)
;; Use skip-chars-backward's LIM argument to leave
;; characters before STARTPOS undisturbed.
(progn (skip-chars-backward " \t" startpos)
(point)))
(indent-to column)))
;; Width of whitespace to be deleted and recreated.
(setq whitewidth (- (current-column) begcol)))
;; Delete the whitespace following the start column.
(delete-region startpos (point))
;; Open the desired width, plus same amount of whitespace we just deleted.
(indent-to (+ endcol whitewidth))))
;;;###autoload
(defun string-rectangle (start end string)
@ -199,21 +200,22 @@ This command does not delete or overwrite any existing text.
Called from a program, takes three args; START, END and STRING."
(interactive "r\nsString rectangle: ")
(operate-on-rectangle 'string-rectangle-line start end nil)
(operate-on-rectangle 'string-rectangle-line start end t)
(goto-char start))
(defun string-rectangle-line (startpos begextra endextra)
(let ((column (+ (current-column) begextra endextra)))
(let (whitespace)
(goto-char startpos)
;; Compute horizontal width of following whitespace.
(let ((ocol (current-column)))
(skip-chars-forward " \t")
(setq column (+ column (- (current-column) ocol))))
(delete-region (point)
;; Use skip-chars-backward's LIM argument to leave
;; characters before STARTPOS undisturbed.
(progn (skip-chars-backward " \t" startpos)
(point)))
(insert string)))
(setq whitespace (- (current-column) ocol)))
;; Delete the following whitespace.
(delete-region startpos (point))
;; Insert the desired string.
(insert string)
;; Insert the same width of whitespace that we had before.
(indent-to (+ (current-column) whitespace))))
;;;###autoload
(defun clear-rectangle (start end)
@ -224,12 +226,15 @@ When called from a program, requires two args which specify the corners."
(operate-on-rectangle 'clear-rectangle-line start end t))
(defun clear-rectangle-line (startpos begextra endextra)
;; Find end of whitespace after the rectangle.
(skip-chars-forward " \t")
(let ((column (+ (current-column) endextra)))
;; Delete the text in the rectangle, and following whitespace.
(delete-region (point)
(progn (goto-char startpos)
(skip-chars-backward " \t")
(point)))
;; Reindent out to same column that we were at.
(indent-to column)))
(provide 'rect)