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(set-fill-prefix): start from left-margin.

Browse Source 
(fill-region-as-paragraph): don't delete hard newlines.  ignore whitespace
at beginning of region.  Remove justification indentation.
(fill-region): Don't use paragraph-movement commands when use-hard-newlines
is true, just search for hard newlines.
(current-justification): take care at EOB.
(set-justification): new argWHOLE-PAR.  Callers changed.
(justify-current-line): Error if JUSTIFY arg is not reasonable.
Better interaction if there is a fill-prefix.
"Line too long" warning removed.
(unjustify-current-line, unjustify-region): New functions.
This commit is contained in:
Boris Goldowsky 1995-02-23 18:22:04 +00:00
parent 0bc395d481
commit 1095bc3caa
1 changed files with 444 additions and 286 deletions
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730
lisp/textmodes/fill.el
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@ -46,7 +46,7 @@ Filling expects lines to start with the fill prefix and
reinserts the fill prefix in each resulting line."
(interactive)
(setq fill-prefix (buffer-substring
(save-excursion (beginning-of-line) (point))
(save-excursion (move-to-left-margin) (point))
(point)))
(if (equal fill-prefix "")
(setq fill-prefix nil))
@ -120,13 +120,17 @@ Remove indenation from each line."
(insert-and-inherit ? ))))
(defun fill-region-as-paragraph (from to &optional justify nosqueeze)
"Fill region as one paragraph: break lines to fit `fill-column'.
This removes any paragraph breaks in the region.
It performs justification according to the `justification' text-property,
but a prefix arg can be used to override this and request full justification.
"Fill the region as one paragraph.
Removes any paragraph breaks in the region and extra newlines at the end,
indents and fills lines between the margins given by the
`current-left-margin' and `current-fill-column' functions.
Optional fourth arg NOSQUEEZE non-nil means to leave whitespace other than line
breaks untouched. Normally it is made canonical before filling.
Normally performs justification according to the `current-justification'
function, but with a prefix arg, does full justification instead.
From a program, optional third arg JUSTIFY can specify any type of
justification, and fourth arg NOSQUEEZE non-nil means not to make spaces
between words canonical before filling.
If `sentence-end-double-space' is non-nil, then period followed by one
space does not end a sentence, so don't break a line there."
@ -134,188 +138,208 @@ space does not end a sentence, so don't break a line there."
;; Arrange for undoing the fill to restore point.
(if (and buffer-undo-list (not (eq buffer-undo-list t)))
(setq buffer-undo-list (cons (point) buffer-undo-list)))
(or justify (setq justify (current-justification)))
;; Don't let Adaptive Fill mode alter the fill prefix permanently.
(let ((fill-prefix fill-prefix)
(skip-after 0))
;; Figure out how this paragraph is indented, if desired.
(if (and adaptive-fill-mode
(or (null fill-prefix) (string= fill-prefix "")))
(save-excursion
(goto-char (min from to))
(if (eolp) (forward-line 1))
(forward-line 1)
(move-to-left-margin)
(if (< (point) (max from to))
(let ((start (point)))
(re-search-forward adaptive-fill-regexp)
(setq fill-prefix (buffer-substring start (point)))
(set-text-properties 0 (length fill-prefix) nil fill-prefix))
(goto-char (min from to))
;; Make sure "to" is the endpoint. Make sure that we end up there.
(goto-char (min from to))
(setq to (max from to))
(setq from (point))
;; Delete all but one soft newline at end of region.
(goto-char to)
(let ((oneleft nil))
(while (and (> (point) from) (eq ?\n (char-after (1- (point)))))
(if (and oneleft
(not (and use-hard-newlines
(get-text-property (1- (point)) 'hard))))
(delete-backward-char 1)
(backward-char 1)
(setq oneleft t)))
;; If there was no newline, create one.
(if (and (not oneleft) (> (point) from))
(save-excursion (newline))))
(setq to (point))
;; Ignore blank lines at beginning of region.
(goto-char from)
(skip-chars-forward " \t\n")
(beginning-of-line)
(setq from (point))
(if (>= from to)
nil ; There is no paragraph at all.
(or justify (setq justify (current-justification)))
;; Don't let Adaptive Fill mode alter the fill prefix permanently.
(let ((fill-prefix fill-prefix))
;; Figure out how this paragraph is indented, if desired.
(if (and adaptive-fill-mode
(or (null fill-prefix) (string= fill-prefix "")))
(save-excursion
(goto-char from)
(if (eolp) (forward-line 1))
(forward-line 1)
(move-to-left-margin)
(if (< (point) to)
(let ((start (point)))
(re-search-forward adaptive-fill-regexp)
(setq fill-prefix (buffer-substring start (point)))
(set-text-properties 0 (length fill-prefix) nil
fill-prefix)))
;; If paragraph has only one line, don't assume in general
;; that additional lines would have the same starting
;; decoration. Assume no indentation.
)))
(if (not justify) ; filling disabled: just check indentation
(progn
(goto-char (min from to))
(setq to (max from to))
(while (< (point) to)
(if (not (eolp))
(if (< (current-indentation) (current-left-margin))
(indent-to-left-margin)))
(forward-line 1)))
))
(save-restriction
(let (beg)
(goto-char (min from to))
(skip-chars-forward "\n")
(setq beg (point))
(goto-char (max from to))
(skip-chars-backward "\n")
(setq skip-after (- to (point)))
;; If we omit some final newlines from the end of the narrowing,
;; arrange to advance past them at the end.
(setq to (point)
from beg)
(goto-char from)
(beginning-of-line)
(narrow-to-region (point) to)
(if (not justify) ; filling disabled: just check indentation
(progn
(goto-char from)
(while (not (eobp))
(if (and (not (eolp))
(< (current-indentation) (current-left-margin)))
(indent-to-left-margin))
(forward-line 1)))
(if use-hard-newlines
(remove-text-properties from (point-max) '(hard nil)))
;; Make sure first line is indented (at least) to left margin...
(if (or (memq justify '(right center))
(< (current-indentation) (current-left-margin)))
(indent-to-left-margin))
;; and remove indentation from other lines.
(beginning-of-line 2)
(indent-region (point) (point-max) 0)
;; Delete the fill prefix from every line except the first.
;; The first line may not even have a fill prefix.
(goto-char from)
(beginning-of-line)
(narrow-to-region (point) to))
(if use-hard-newlines
(remove-text-properties from to '(hard nil)))
;; Make sure first line is indented (at least) to left margin...
(if (or (memq justify '(right center))
(< (current-indentation) (current-left-margin)))
(indent-to-left-margin))
;; and remove indentation from other lines.
(beginning-of-line 2)
(indent-region (point) (point-max) 0)
;; Delete the fill prefix from every line except the first.
;; The first line may not even have a fill prefix.
(goto-char from)
(let ((fpre (and fill-prefix (not (equal fill-prefix ""))
(concat "[ \t]*"
(regexp-quote fill-prefix)))))
(and fpre
(progn
(if (>= (+ (current-left-margin) (length fill-prefix))
(current-fill-column))
(error "fill-prefix too long for specified width"))
(goto-char from)
(forward-line 1)
(while (not (eobp))
(if (looking-at fpre)
(delete-region (point) (match-end 0)))
(forward-line 1))
(goto-char from)
(and (looking-at fpre) (goto-char (match-end 0)))
(setq from (point)))))
;; "from" is now before the text to fill,
;; but after any fill prefix on the first line.
(let ((fpre (and fill-prefix (not (equal fill-prefix ""))
(concat "[ \t]*"
(regexp-quote fill-prefix)
"[ \t]*"))))
(and fpre
(progn
(if (>= (+ (current-left-margin) (length fill-prefix))
(current-fill-column))
(error "fill-prefix too long for specified width"))
(goto-char from)
(forward-line 1)
(while (not (eobp))
(if (looking-at fpre)
(delete-region (point) (match-end 0)))
(forward-line 1))
(goto-char from)
(and (looking-at fpre) (goto-char (match-end 0)))
(setq from (point)))))
;; "from" is now before the text to fill,
;; but after any fill prefix on the first line.
;; Make sure sentences ending at end of line get an extra space.
;; loses on split abbrevs ("Mr.\nSmith")
(while (re-search-forward "[.?!][])}\"']*$" nil t)
(insert-and-inherit ? ))
(goto-char from)
(skip-chars-forward " \t")
;; Then change all newlines to spaces.
(subst-char-in-region from (point-max) ?\n ?\ )
(if (and nosqueeze (not (eq justify 'full)))
nil
(canonically-space-region (point) (point-max))
(goto-char (point-max))
(delete-horizontal-space)
(insert-and-inherit " "))
(goto-char (point-min))
;; Make sure sentences ending at end of line get an extra space.
;; loses on split abbrevs ("Mr.\nSmith")
(while (re-search-forward "[.?!][])}\"']*$" nil t)
(insert-and-inherit ? ))
(goto-char from)
(skip-chars-forward " \t")
;; Then change all newlines to spaces.
(subst-char-in-region from (point-max) ?\n ?\ )
(if (and nosqueeze (not (eq justify 'full)))
nil
(canonically-space-region (point) (point-max))
(goto-char (point-max))
(delete-horizontal-space)
(insert-and-inherit " "))
(goto-char (point-min))
;; This is the actual filling loop.
(let ((prefixcol 0) linebeg)
(while (not (eobp))
(setq linebeg (point))
(move-to-column (1+ (current-fill-column)))
(if (eobp)
(or nosqueeze (delete-horizontal-space))
;; Move back to start of word.
(skip-chars-backward "^ \n" linebeg)
;; Don't break after a period followed by just one space.
;; Move back to the previous place to break.
;; The reason is that if a period ends up at the end of a line,
;; further fills will assume it ends a sentence.
;; If we now know it does not end a sentence,
;; avoid putting it at the end of the line.
(if sentence-end-double-space
(while (and (> (point) (+ linebeg 2))
(eq (preceding-char) ?\ )
(not (eq (following-char) ?\ ))
(eq (char-after (- (point) 2)) ?\.))
(forward-char -2)
(skip-chars-backward "^ \n" linebeg)))
(if (if (zerop prefixcol)
(save-excursion
(skip-chars-backward " " linebeg)
(bolp))
(>= prefixcol (current-column)))
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles all but the first line of the paragraph.
;; Meanwhile, don't stop at a period followed by one space.
(let ((first t))
(move-to-column prefixcol)
(while (and (not (eobp))
(or first
(and (not (bobp))
sentence-end-double-space
(save-excursion (forward-char -1)
(and (looking-at "\\. ")
(not (looking-at "\\. ")))))))
(skip-chars-forward " ")
(skip-chars-forward "^ \n")
(setq first nil)))
;; Normally, move back over the single space between the words.
(forward-char -1))
(if (and fill-prefix (zerop prefixcol)
(< (- (point) (point-min)) (length fill-prefix))
(string= (buffer-substring (point-min) (point))
(substring fill-prefix 0 (- (point) (point-min)))))
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles the first line of the paragraph.
;; Don't stop at a period followed by just one space.
(let ((first t))
(while (and (not (eobp))
(or first
(and (not (bobp))
sentence-end-double-space
(save-excursion (forward-char -1)
(and (looking-at "\\. ")
(not (looking-at "\\. ")))))))
(skip-chars-forward " ")
(skip-chars-forward "^ \n")
(setq first nil))))
;; Replace whitespace here with one newline, then indent to left
;; margin.
(skip-chars-backward " ")
(insert ?\n)
;; Give newline the properties of the space(s) it replaces
(set-text-properties (1- (point)) (point)
(text-properties-at (point)))
(indent-to-left-margin)
;; Insert the fill prefix after indentation.
;; Set prefixcol so whitespace in the prefix won't get lost.
(and fill-prefix (not (equal fill-prefix ""))
(progn
(insert-and-inherit fill-prefix)
(setq prefixcol (current-column)))))
;; Justify the line just ended, if desired.
(if justify
(if (eobp)
(justify-current-line justify t t)
(forward-line -1)
(justify-current-line justify nil t)
(forward-line 1))))))
(forward-char skip-after))))
;; This is the actual filling loop.
(let ((prefixcol 0) linebeg)
(while (not (eobp))
(setq linebeg (point))
(move-to-column (1+ (current-fill-column)))
(if (eobp)
(or nosqueeze (delete-horizontal-space))
;; Move back to start of word.
(skip-chars-backward "^ \n" linebeg)
;; Don't break after a period followed by just one space.
;; Move back to the previous place to break.
;; The reason is that if a period ends up at the end of a line,
;; further fills will assume it ends a sentence.
;; If we now know it does not end a sentence,
;; avoid putting it at the end of the line.
(if sentence-end-double-space
(while (and (> (point) (+ linebeg 2))
(eq (preceding-char) ?\ )
(not (eq (following-char) ?\ ))
(eq (char-after (- (point) 2)) ?\.))
(forward-char -2)
(skip-chars-backward "^ \n" linebeg)))
(if (if (zerop prefixcol)
(save-excursion
(skip-chars-backward " " linebeg)
(bolp))
(>= prefixcol (current-column)))
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles all but the first line of the paragraph.
;; Meanwhile, don't stop at a period followed by one space.
(let ((first t))
(move-to-column prefixcol)
(while (and (not (eobp))
(or first
(and (not (bobp))
sentence-end-double-space
(save-excursion (forward-char -1)
(and (looking-at "\\. ")
(not (looking-at "\\. ")))))))
(skip-chars-forward " ")
(skip-chars-forward "^ \n")
(setq first nil)))
;; Normally, move back over the single space between the words.
(forward-char -1))
(if (and fill-prefix (zerop prefixcol)
(< (- (point) (point-min)) (length fill-prefix))
(string= (buffer-substring (point-min) (point))
(substring fill-prefix 0 (- (point) (point-min)))))
;; Keep at least one word even if fill prefix exceeds margin.
;; This handles the first line of the paragraph.
;; Don't stop at a period followed by just one space.
(let ((first t))
(while (and (not (eobp))
(or first
(and (not (bobp))
sentence-end-double-space
(save-excursion (forward-char -1)
(and (looking-at "\\. ")
(not (looking-at "\\. ")))))))
(skip-chars-forward " ")
(skip-chars-forward "^ \n")
(setq first nil))))
;; Replace whitespace here with one newline, then indent to left
;; margin.
(skip-chars-backward " ")
(insert ?\n)
;; Give newline the properties of the space(s) it replaces
(set-text-properties (1- (point)) (point)
(text-properties-at (point)))
(indent-to-left-margin)
;; Insert the fill prefix after indentation.
;; Set prefixcol so whitespace in the prefix won't get lost.
(and fill-prefix (not (equal fill-prefix ""))
(progn
(insert-and-inherit fill-prefix)
(setq prefixcol (current-column)))))
;; Justify the line just ended, if desired.
(if justify
(if (eobp)
(justify-current-line justify t t)
(forward-line -1)
(justify-current-line justify nil t)
(forward-line 1))))))
;; Leave point after final newline.
(goto-char (point-max)))
(forward-char 1))))
(defun fill-paragraph (arg)
"Fill paragraph at or after point. Prefix arg means justify as well.
@ -354,10 +378,7 @@ hard newline, if `use-hard-newlines' is on).
If `sentence-end-double-space' is non-nil, then period followed by one
space does not end a sentence, so don't break a line there."
(interactive "r\nP")
;; If using hard newlines, break at every one for filling purposes rather
;; than breaking at normal paragraph breaks.
(let ((paragraph-start (if use-hard-newlines "^" paragraph-start))
end beg)
(let (end beg)
(save-restriction
(goto-char (max from to))
(if to-eop
@ -369,9 +390,21 @@ space does not end a sentence, so don't break a line there."
(narrow-to-region (point) end)
(while (not (eobp))
(let ((initial (point))
(end (progn
(forward-paragraph 1) (point))))
(forward-paragraph -1)
end)
;; If using hard newlines, break at every one for filling
;; purposes rather than using paragraph breaks.
(if use-hard-newlines
(progn
(while (and (setq end (text-property-any (point) (point-max)
'hard t))
(not (= ?\n (char-after end)))
(not (= end (point-max))))
(goto-char (1+ end)))
(setq end (min (point-max) (1+ end)))
(goto-char initial))
(forward-paragraph 1)
(setq end (point))
(forward-paragraph -1))
(if (< (point) beg)
(goto-char beg))
(if (>= (point) initial)
@ -394,154 +427,279 @@ or the variable `default-justification' if there is no text-property.
However, it returns nil rather than `none' to mean \"don't justify\"."
(let ((j (or (get-text-property
;; Make sure we're looking at paragraph body.
(save-excursion (skip-chars-forward " \t") (point))
(save-excursion (skip-chars-forward " \t")
(if (and (eobp) (not (bobp)))
(1- (point)) (point)))
'justification)
default-justification)))
(if (eq 'none j)
nil
j)))
(defun set-justification (begin end value)
(defun set-justification (begin end value &optional whole-par)
"Set the region's justification style.
If the mark is not active, this operates on the current line.
In interactive use, if the BEGIN and END points are
not at line breaks, they are moved outward to the next line break.
If `use-hard-newlines' is true, they are moved to the next hard line breaks.
Noninteractively, the values of BEGIN, END and VALUE are not modified."
The kind of justification to use is prompted for.
If the mark is not active, this command operates on the current paragraph.
If the mark is active, the region is used. However, if the beginning and end
of the region are not at paragraph breaks, they are moved to the beginning and
end of the paragraphs they are in.
If `use-hard-newlines' is true, all hard newlines are taken to be paragraph
breaks.
When calling from a program, operates just on region between BEGIN and END,
unless optional fourth arg WHOLE-PAR is non-nil. In that case bounds are
extended to include entire paragraphs as in the interactive command."
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))
(let ((s (completing-read
(let ((s (completing-read
"Set justification to: "
'(("left") ("right") ("full") ("center")
("none"))
'(("left") ("right") ("full")
("center") ("none"))
nil t)))
(if (equal s "")
(error "")
(intern s)))))
(let* ((paragraph-start (if use-hard-newlines "^" paragraph-start)))
(save-excursion
(goto-char begin)
(while (bolp) (forward-char 1))
(backward-paragraph)
(setq begin (point))
(if (equal s "") (error ""))
(intern s))
t))
(save-excursion
(save-restriction
(if whole-par
(let ((paragraph-start (if use-hard-newlines "." paragraph-start))
(paragraph-ignore-fill-prefix (if use-hard-newlines t
paragraph-ignore-fill-prefix)))
(goto-char begin)
(while (and (bolp) (not (eobp))) (forward-char 1))
(backward-paragraph)
(setq begin (point))
(goto-char end)
(skip-chars-backward " \t\n" begin)
(forward-paragraph)
(setq end (point))))
(goto-char end)
(skip-chars-backward " \t\n" begin)
(forward-paragraph)
(setq end (point))
(set-mark begin)
(goto-char end)
(y-or-n-p "set-just")))
(put-text-property begin end 'justification value)
(fill-region begin end nil t))
(narrow-to-region (point-min) end)
(unjustify-region begin (point-max))
(put-text-property begin (point-max) 'justification value)
(fill-region begin (point-max) nil t))))
(defun set-justification-none (b e)
"Disable automatic filling for paragraphs in the region.
If the mark is not active, this applies to the current paragraph."
(interactive "r")
(set-justification b e 'none))
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))))
(set-justification b e 'none t))
(defun set-justification-left (b e)
"Make paragraphs in the region left-justified.
This is usually the default, but see `enriched-default-justification'.
This is usually the default, but see the variable `default-justification'.
If the mark is not active, this applies to the current paragraph."
(interactive "r")
(set-justification b e 'left))
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))))
(set-justification b e 'left t))
(defun set-justification-right (b e)
"Make paragraphs in the region right-justified:
Flush at the right margin and ragged on the left.
If the mark is not active, this applies to the current paragraph."
(interactive "r")
(set-justification b e 'right))
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))))
(set-justification b e 'right t))
(defun set-justification-full (b e)
"Make paragraphs in the region fully justified:
Flush on both margins.
This makes lines flush on both margins by inserting spaces between words.
If the mark is not active, this applies to the current paragraph."
(interactive "r")
(set-justification b e 'both))
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))))
(set-justification b e 'full t))
(defun set-justification-center (b e)
"Make paragraphs in the region centered.
If the mark is not active, this applies to the current paragraph."
(interactive "r")
(set-justification b e 'center))
(interactive (list (if mark-active (region-beginning) (point))
(if mark-active (region-end) (point))))
(set-justification b e 'center t))
;; A line has up to six parts:
;;
;; >>> hello.
;; [Indent-1][FP][ Indent-2 ][text][trailing whitespace][newline]
;;
;; "Indent-1" is the left-margin indentation; normally it ends at column
;; given by the `current-left-margin' function.
;; "FP" is the fill-prefix. It can be any string, including whitespace.
;; "Indent-2" is added to justify a line if the `current-justification' is
;; `center' or `right'. In `left' and `full' justification regions, any
;; whitespace there is part of the line's text, and should not be changed.
;; Trailing whitespace is not counted as part of the line length when
;; center- or right-justifying.
;;
;; All parts of the line are optional, although the final newline can
;; only be missing on the last line of the buffer.
(defun justify-current-line (&optional how eop nosqueeze)
"Add spaces to line point is in, so it ends at `fill-column'.
"Do some kind of justification on this line.
Normally does full justification: adds spaces to the line to make it end at
the column given by `current-fill-column'.
Optional first argument HOW specifies alternate type of justification:
it can be `left', `right', `full', `center', or `none'.
If HOW is t, will justify however the `justification' function says.
Any other value, including nil, is taken to mean `full'.
If HOW is t, will justify however the `current-justification' function says to.
If HOW is nil or missing, full justification is done by default.
Second arg EOP non-nil means that this is the last line of the paragraph, so
it will not be stretched by full justification.
Third arg NOSQUEEZE non-nil means to leave interior whitespace unchanged,
otherwise it is made canonical."
(interactive (list 'full nil nil))
(interactive)
(if (eq t how) (setq how (or (current-justification) 'none)))
(or (memq how '(none left))
(save-excursion
(save-restriction
(let ((fc (current-fill-column))
ncols beg indent end)
(end-of-line)
(if (and use-hard-newlines (null eop)
(get-text-property (point) 'hard))
(setq eop t))
(skip-chars-backward " \t")
(if (= (current-column) fc)
nil ;; Quick exit if it appears to be properly justified already.
(setq end (point))
(beginning-of-line)
(skip-chars-forward " \t")
(if (and fill-prefix
(equal fill-prefix
(buffer-substring (point)
(min (point-max)
(+ (point) (length fill-prefix))))))
(forward-char (length fill-prefix)))
(setq indent (current-column))
(setq beg (point))
(goto-char end)
(cond ((or (eq 'none how) (eq 'left how))
nil)
((eq 'right how)
(setq ncols (- (+ indent (current-fill-column))
(current-column)))
(if (> ncols 0)
(indent-line-to ncols)))
((eq 'center how)
(setq ncols
(/ (- (+ indent (current-fill-column)) (current-column))
2))
(if (>= ncols 0)
(indent-line-to ncols)
(message "Line to long to center")))
(t ;; full
(if (null how) (setq how 'full))
(or (memq how '(none left)) ; No action required for these.
(let ((fc (current-fill-column))
(pos (point-marker))
fp-end ; point at end of fill prefix
beg ; point at beginning of line's text
end ; point at end of line's text
indent ; column of `beg'
endcol ; column of `end'
ncols) ; new indent point or offset
(end-of-line)
;; Check if this is the last line of the paragraph.
(if (and use-hard-newlines (null eop)
(get-text-property (point) 'hard))
(setq eop t))
(skip-chars-backward " \t")
;; Quick exit if it appears to be properly justified already
;; or there is no text.
(if (or (bolp)
(and (memq how '(full right))
(= (current-column) fc)))
nil
(setq end (point))
(beginning-of-line)
(skip-chars-forward " \t")
;; Skip over fill-prefix.
(if (and fill-prefix
(not (string-equal fill-prefix ""))
(equal fill-prefix
(buffer-substring
(point) (min (point-max) (+ (length fill-prefix)
(point))))))
(forward-char (length fill-prefix))
(if (and adaptive-fill-mode
(looking-at adaptive-fill-regexp))
(goto-char (match-end 0))))
(setq fp-end (point))
(skip-chars-forward " \t")
;; This is beginning of the line's text.
(setq indent (current-column))
(setq beg (point))
(goto-char end)
(setq endcol (current-column))
;; HOW can't be null or left--we would have exited already
(cond ((eq 'right how)
(setq ncols (- fc endcol))
(if (< ncols 0)
;; Need to remove some indentation
(delete-region
(progn (goto-char fp-end)
(if (< (current-column) (+ indent ncols))
(move-to-column (+ indent ncols) t))
(point))
(progn (move-to-column indent) (point)))
;; Need to add some
(goto-char beg)
(indent-to (+ indent ncols))
;; If point was at beginning of text, keep it there.
(if (= beg pos)
(move-marker pos (point)))))
((eq 'center how)
;; Figure out how much indentation is needed
(setq ncols (+ (current-left-margin)
(/ (- fc (current-left-margin) ;avail. space
(- endcol indent)) ;text width
2)))
(if (< ncols indent)
;; Have too much indentation - remove some
(delete-region
(progn (goto-char fp-end)
(if (< (current-column) ncols)
(move-to-column ncols t))
(point))
(progn (move-to-column indent) (point)))
;; Have too little - add some
(goto-char beg)
(indent-to ncols)
;; If point was at beginning of text, keep it there.
(if (= beg pos)
(move-marker pos (point)))))
((eq 'full how)
;; Insert extra spaces between words to justify line
(save-restriction
(narrow-to-region beg end)
(or nosqueeze
(canonically-space-region beg end))
(goto-char (point-max))
(setq ncols (- (current-fill-column) indent (current-column)))
(if (< ncols 0)
(message "Line to long to justify")
(if (and (not eop)
(search-backward " " nil t))
(while (> ncols 0)
(let ((nmove (+ 3 (random 3))))
(while (> nmove 0)
(or (search-backward " " nil t)
(progn
(goto-char (point-max))
(search-backward " ")))
(skip-chars-backward " ")
(setq nmove (1- nmove))))
(insert-and-inherit " ")
(skip-chars-backward " ")
(setq ncols (1- ncols))))))))))))
(setq ncols (- fc endcol))
;; Ncols is number of additional spaces needed
(if (> ncols 0)
(if (and (not eop)
(search-backward " " nil t))
(while (> ncols 0)
(let ((nmove (+ 3 (random 3))))
(while (> nmove 0)
(or (search-backward " " nil t)
(progn
(goto-char (point-max))
(search-backward " ")))
(skip-chars-backward " ")
(setq nmove (1- nmove))))
(insert-and-inherit " ")
(skip-chars-backward " ")
(setq ncols (1- ncols)))))))
(t (error "Unknown justification value"))))
(goto-char pos)
(move-marker pos nil)))
nil)
(defun unjustify-current-line ()
"Remove justification whitespace from current line.
If the line is centered or right-justified, this function removes any
indentation past the left margin. If the line is full-jusitified, it removes
extra spaces between words. It does nothing in other justification modes."
(let ((justify (current-justification)))
(cond ((eq 'left justify) nil)
((eq nil justify) nil)
((eq 'full justify) ; full justify: remove extra spaces
(beginning-of-line-text)
(canonically-space-region
(point) (save-excursion (end-of-line) (point))))
((memq justify '(center right))
(save-excursion
(move-to-left-margin nil t)
;; Position ourselves after any fill-prefix.
(if (and fill-prefix
(not (string-equal fill-prefix ""))
(equal fill-prefix
(buffer-substring
(point) (min (point-max) (+ (length fill-prefix)
(point))))))
(forward-char (length fill-prefix)))
(delete-region (point) (progn (skip-chars-forward " \t")
(point))))))))
(defun unjustify-region (&optional begin end)
"Remove justification whitespace from region.
For centered or right-justified regions, this function removes any indentation
past the left margin from each line. For full-jusitified lines, it removes
extra spaces between words. It does nothing in other justification modes.
Arguments BEGIN and END are optional; default is the whole buffer."
(save-excursion
(save-restriction
(if end (narrow-to-region (point-min) end))
(goto-char (or begin (point-min)))
(while (not (eobp))
(unjustify-current-line)
(forward-line 1)))))
(defun fill-nonuniform-paragraphs (min max &optional justifyp mailp)
"Fill paragraphs within the region, allowing varying indentation within each.