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|
;;; cl-typesetting copyright 2003-2004 Marc Battyani see license.txt for the details
;;; You can reach me at marc.battyani@fractalconcept.com or marc@battyani.net
;;; The homepage of cl-typesetting is here: http://www.fractalconcept.com/asp/html/cl-typesetting.html
;;; Thanks to Dmitri Ivanov for the splittable tables!
(in-package typeset)
(defvar *table* nil)
(defvar *table-row* nil)
(defclass table-cell ()
((content :accessor content :initarg :content)
(box :accessor box)
(width :accessor width :initform 0)
(height :accessor height :initform 0)
(v-align :accessor v-align :initform :top :initarg :v-align)
(background-color :accessor background-color :initform nil :initarg :background-color)
(col-span :accessor col-span :initform 1 :initarg :col-span)
(row-span :accessor row-span :initform 1 :initarg :row-span)
;; Quad specifying the border to be drawn between table border and cell padding;
;; Borders of a cell count for its external height (unless it is limited by the height
;; of the containing row) and tighten the width of its content box.
;; Hence, they participate in the calculation of total row or table height,
;; but do not increase column width.
;; If is symbol, has special mening:
;; - T (default) means "inherit" from table (or row?),
;; - NIL, displays no additional border and even supresses the table border.
(border :accessor border :initform t :initarg :border)))
(defclass table-row ()
((height :accessor height :initform nil :initarg :height)
(splittable-p :accessor splittable-p :initform t :initarg :splittable-p)
(background-color :accessor background-color :initform nil :initarg :background-color)
(cells :accessor cells :initform () :initarg :cells)))
(defclass table (box v-mode-mixin)
((cols-widths :accessor col-widths :initform nil :initarg :col-widths)
(h-align :accessor h-align :initform :left :initarg :h-align)
(splittable-p :accessor splittable-p :initform t :initarg :splittable-p)
(border :accessor border :initform 1 :initarg :border)
(border-color :accessor border-color :initform '(0 0 0) :initarg :border-color)
(background-color :accessor background-color :initform nil :initarg :background-color)
(padding :accessor padding :initform 1 :initarg :padding)
(cell-padding :accessor cell-padding :initform 1 :initarg :cell-padding)
(rows :accessor rows :initform ())
(header :accessor header :initform nil) ; rows printed on each page
(footer :accessor footer :initform nil) ; rows printed on each page
(header&footer-height :accessor header&footer-height :initform 0)
))
(defclass split-table (box v-mode-mixin)
((original-table :accessor original-table :initform nil :initarg :original-table)
(rows :accessor rows :initform nil :initarg :rows)))
(defun add-table-row (row &optional (table *table*))
(if (rows table)
(setf (cdr (last (rows table))) (list row))
(setf (rows table) (list row))))
(defun add-table-cell (cell &optional (row *table-row*))
(if (cells row)
(setf (cdr (last (cells row))) (list cell))
(setf (cells row) (list cell))))
(defun first-or-self (arg)
;;; The first element of arg, if it is a list; else arg itself.
;; Code from Paradigms of AI Programming, Copyright (c) 1991 Peter Norvig
(if (consp arg) (first arg) arg))
(defmacro cell-start-row-p (cell row)
`(or (numberp (row-span ,cell)) ; still untouched cell
(eq (first-or-self (row-span ,cell)) ,row)))
(defmacro cell-end-row-p (cell row)
`(and (consp (row-span ,cell))
(eq (first (last (row-span ,cell))) ,row)))
(defun span-cell (rows cell col-number)
;;; Replace the cell's numeric row-span by the list of rows spanned
;; and add the cell into the cell list of each of these rows.
;; Args: rows Table row sublist starting from the one where the cell was defined.
;; col-number Starts from zero.
(setf (splittable-p (first rows)) nil)
(loop for row in (rest rows)
and i downfrom (1- (row-span cell)) above 0 ;repeat (1- (row-span cell))
collect row into rows-spanned
when (> i 1) ; set all but last rows unsplittable
do (setf (splittable-p row) nil)
do
(loop for j = 0 then (+ j (col-span c))
for tail = (cells row) then (cdr tail);; hack for CLISP instead of for tail on (cells row)
for c = (first tail) ; j is the column number of c
while (and c (< j col-number))
collect (first tail) into head
finally ; insert cell between head and tail
(setf (cells row) (nconc head (list cell) tail)))
finally ; replace numeric row-span by the list
(return (setf (row-span cell) (cons (first rows) rows-spanned)))))
(defun compute-row-size (table row &optional rows)
(let ((full-size-offset (+ (border table) (* 2 (cell-padding table))))
(height (or (height row) +huge-number+)))
(loop with next-widths = (col-widths table)
for cell in (cells row)
and width = (pop next-widths)
and col-number = 0 then (+ col-number col-span 1)
and cell-height = 0.0
for col-span = (1- (col-span cell))
and row-span = (row-span cell)
and cell-border = (border cell)
for cell-borders-width
= (cond ((symbolp cell-border) 0)
((numberp cell-border) (+ cell-border cell-border))
((with-quad (left-border nil right-border) cell-border
(+ left-border right-border))))
and cell-borders-height
= #1=(cond ((symbolp cell-border) 0)
((numberp cell-border) (+ cell-border cell-border))
((with-quad (left-border top-border nil bottom-border) cell-border
(+ top-border bottom-border))))
unless width do (error "Too many cells in this row")
;; Adjust cell width for cells spanning multiple columns
unless (zerop col-span)
do (incf width (+ (* col-span full-size-offset)
(reduce #'+ next-widths :end col-span)))
(setf next-widths (nthcdr col-span next-widths))
;; Fill cell with content if required
when (cell-start-row-p cell row)
do (setf (box cell) (make-filled-vbox (content cell)
(- width cell-borders-width)
height (v-align cell))
(width cell) width)
;; A cell spanning several rows participates only in height calculation
;; of the last row
if (and (numberp row-span) (> row-span 1))
do (span-cell rows cell col-number)
else unless (height row)
if (eql row-span 1)
do (setq cell-height (+ (compute-boxes-natural-size (boxes (box cell)) #'dy)
cell-borders-height))
else if (cell-end-row-p cell row)
do (setq cell-height
(- (+ (compute-boxes-natural-size (boxes (box cell)) #'dy)
cell-borders-height)
(reduce #'+ row-span
:key #'height
:end (1- (length row-span))
:initial-value (* (1- (length row-span))
full-size-offset))))
maximize cell-height into max-height
finally (setf height (+ (max (or (height row) 0.0) max-height) +epsilon+)))
(setf (height row) height)
(loop for cell in (cells row)
for row-span = (row-span cell)
and cell-border = (border cell)
for cell-borders-height = #1#
if (eql row-span 1)
do (setf (height cell) height
(dy (box cell)) (- height cell-borders-height))
(do-layout (box cell))
else if (cell-end-row-p cell row)
do (let ((height (reduce #'+ row-span :key #'height
:initial-value (* (1- (length row-span))
full-size-offset))))
(setf (height cell) height
(dy (box cell)) (- height cell-borders-height))
(do-layout (box cell))))
height))
(defmethod compute-table-size (table)
(loop for rows on (header table)
do (compute-row-size table (first rows) rows))
(loop for rows on (rows table)
do (compute-row-size table (first rows) rows))
(loop for rows on (footer table)
do (compute-row-size table (first rows) rows))
(let ((nb-h&f (+ (length (header table))(length (footer table))))
(nb-rows (length (rows table)))
(nb-cols (length (col-widths table))))
(setf (header&footer-height table)
(+ (* 2 nb-h&f (cell-padding table))
(* nb-h&f (border table))
(reduce #'+ (header table) :key 'height)
(reduce #'+ (footer table) :key 'height)))
(setf (dx table)(+ (* 2 (padding table))
(* 2 nb-cols (cell-padding table))
(* (1+ nb-cols) (border table))
(reduce #'+ (col-widths table))
+epsilon+)
(dy table)(+ (* 2 (padding table))
(* 2 nb-rows (cell-padding table))
(* (1+ nb-rows) (border table))
(reduce #'+ (rows table) :key 'height)
(header&footer-height table)
+epsilon+))))
(defmethod v-split ((table table) dx dy)
"Factor out rows that fit and return a split table + the table."
;; Treat unsplittable rows as a single unit - for this purpose,
;; group the rows list into the following form:
;;
;; ( (group1-height row1 row2 ...)
;; (group2-height row7)
;; (group3-height row8 row9 ...) )
;;
(if (splittable-p table)
(with-slots (header footer border padding cell-padding) table ;(print (rows table))
(loop with fitted-rows = ()
with header&footer-height = (header&footer-height table)
with full-size-offset = (+ (* 2 cell-padding) border)
with current-height = (+ border padding)
with available-height = (- dy header&footer-height)
with row-groups = (loop with height = 0
and rows = ()
for row in (rows table)
do
(incf height (+ (height row) full-size-offset))
(push row rows)
when (splittable-p row)
collect (cons height (nreverse rows))
and do (setf height 0 rows nil))
with rows-remaining = (rows table)
;; Do not count the bottom table padding in available-height.
for (group-height . rows) in row-groups
while (<= (+ current-height group-height) available-height)
do (dolist (r rows)
(push r fitted-rows)
(pop rows-remaining))
(incf current-height group-height)
finally (return
(if fitted-rows
(let ((height (+ current-height header&footer-height)))
;; for split-table height, take bottom padding into account
(incf height (min padding (- available-height height)))
;; reduce rows to output
(setf (rows table) rows-remaining)
;; reduce space required by the rest of the table subtracting
;; neither top border nor bottom table padding
;; nor header/footer
(decf (dy table) (- current-height border padding))
(values (make-instance 'split-table
:rows (nreverse fitted-rows)
:original-table table
:dx (dx table) :dy height)
table
(- dy height)))
(values nil table dy)))))
(values nil table dy)))
(defun multi-line (points widths)
;;; Helper akin to polyline, but skips zero-width lines
;; Args: points - list of dotted(!) pairs.
(do ((prev-x (caar points))
(prev-y (cdar points))
(other-points (rest points) (rest other-points)))
((null (and other-points widths)))
(let ((width (pop widths))
(x (caar other-points))
(y (cdar other-points)))
(if (zerop width)
(setq prev-x x prev-y y)
(progn
(pdf:set-line-width width)
(when prev-x (pdf:move-to prev-x prev-y))
(pdf:line-to x y)
(setq prev-x nil prev-y nil))))))
(defun stroke-table (table x y rows dy)
(let* ((padding (padding table))
(border (border table))
(half-border (/ border 2)) ; for more careful drawing
(*table* table))
(when (background-color table)
(pdf:with-saved-state
(pdf:set-color-fill (background-color table))
(if (or (zerop padding) (zerop border))
(pdf:basic-rect x y (dx table) (- dy))
;; External colorful padding should not breach border
(pdf:basic-rect (+ x padding border) (- y padding border)
(- (dx table) (* 2 (+ padding border)))
(- (* 2 (+ padding border)) dy)))
(pdf:fill-path)))
(loop with cell-padding = (cell-padding table)
with full-size-offset = (+ cell-padding cell-padding border)
for row in (append (header table) rows (footer table))
for row-y = (- y padding border) then (- row-y height full-size-offset)
and height = (height row)
and *table-row* = row
do (loop for cell-x = (+ x padding border) then (+ cell-x width full-size-offset)
for cell in (cells row)
for width = (width cell)
for height = (height cell)
and cell-border = (border cell)
and cell-offset-x = cell-padding
and cell-offset-y = cell-padding
when (cell-start-row-p cell row)
do (pdf:with-saved-state
;; Set translation while counting both table border and padding,
;; but neither cell-border nor cell-padding.
(pdf:translate cell-x row-y)
;; First, fill background
(pdf:with-saved-state
(let ((background-color (or (background-color cell)
(background-color row))))
(when background-color
(pdf:set-color-fill background-color)
(pdf:basic-rect (- half-border) half-border ;0 0
(+ width full-size-offset)
(- (+ height full-size-offset)))
(pdf:fill-path)))
(unless (or (zerop border) (null cell-border)) ; next, draw table border
(pdf:set-line-width border)
(pdf:set-gray-stroke 0)
(pdf:basic-rect (- half-border) half-border ;0 0
(+ width full-size-offset)
(- (+ height full-size-offset)))
(pdf:stroke))
;; Last, draw additional cell border
(unless (symbolp cell-border)
(pdf:set-gray-stroke 0)
(with-quad (left-border top-border right-border bottom-border)
cell-border
(if (or (numberp cell-border)
(= left-border top-border right-border bottom-border))
(unless (zerop left-border)
(pdf:set-line-width left-border)
(let ((half-border (/ left-border 2)))
(pdf:basic-rect half-border (- half-border)
(- (+ width full-size-offset) left-border)
(- left-border height full-size-offset))
(incf cell-offset-x left-border)
(incf cell-offset-y left-border)))
(let* ((left (/ left-border 2))
(top (- (/ top-border 2)))
(right (- (+ width full-size-offset)
left (/ right-border 2)))
(bottom (- (/ bottom-border 2) top
height full-size-offset)))
(multi-line `((,left . ,bottom)
(,left . ,top)
(,right . ,top)
(,right . ,bottom)
(,left . ,bottom))
`(,left-border ,top-border
,right-border ,bottom-border))
(incf cell-offset-x left-border)
(incf cell-offset-y top-border))))
(pdf:stroke)))
(stroke (box cell) cell-offset-x (- cell-offset-y)))))))
(defmethod stroke ((table split-table) x y)
(stroke-table (original-table table) x y (rows table) (dy table)))
(defmethod stroke ((table table) x y)
(stroke-table table x y (rows table) (dy table)))
;;; Convenience macros
(defmacro table ((&key col-widths
(padding 5) (cell-padding 2)
(border 1) (border-color #x00000)
background-color
splittable-p)
&body body)
`(let* ((*table* (make-instance 'table :splittable-p ,splittable-p
:col-widths ,col-widths
:padding ,padding :cell-padding ,cell-padding
:background-color ,background-color
:border ,border :border-color ,border-color)))
(add-box *table*)
,@body
(compute-table-size *table*)
*table*))
(defmacro header-row ((&rest args) &body body)
`(let* ((*table-row* (make-instance 'table-row :splittable-p nil ,@args)))
(setf (header *table*) (nconc (header *table*) (list *table-row*)))
,@body
*table-row*))
(defmacro footer-row ((&rest args) &body body)
`(let* ((*table-row* (make-instance 'table-row :splittable-p nil ,@args)))
(setf (footer *table*) (nconc (footer *table*) (list *table-row*)))
,@body
*table-row*))
(defmacro row ((&rest args) &body body)
`(let ((*table-row* (make-instance 'table-row ,@args)))
(add-table-row *table-row*)
,@body
*table-row*))
(defmacro cell ((&rest args) &body body)
`(add-table-cell (make-instance 'table-cell :content (compile-text () ,@body) ,@args)))
#|
(defun test-table (&optional (file (lw:current-pathname "test-table.pdf"))
&aux content table (margins '(72 72 72 50)))
(let* ((tt:*default-font* (pdf:get-font "Helvetica"))
(tt:*default-font-size* 10))
(with-document ()
(setq content (compile-text (:font tt:*default-font* :font-size tt:*default-font-size*)
(tt:paragraph () "Test table spans and borders")
;; Various spans
(tt:table (:col-widths '(20 40 60 80 120) :background-color :yellow :border 1)
(tt:header-row ()
(tt:cell (:col-span 5)
(tt:paragraph (:h-align :center :font-size 12)
"Table with cells spanning more then one row or column")))
(tt:row (:background-color :green)
(tt:cell (:row-span 2 :background-color :blue)
"1,1 2,1 row-span 2")
(tt:cell () "1,2")
(tt:cell (:col-span 2 :row-span 3 :background-color :red)
"1,3 1,4 - 3,3 3,4 col-span 2 row-span 3")
(tt:cell () "1,5"))
(tt::row ()
(tt:cell () "2,2")
(tt:cell (:row-span 2 :background-color :blue) "2,5 3,5 row-span 2"))
(tt:row (:background-color :green)
(tt:cell (:col-span 2) "3,1 3,2 col-span 2"))
(tt::row ()
(tt:cell () "4,1")
(tt:cell () "4,2")
(tt:cell () "4,3")
(tt:cell () "4,4")
(tt:cell () "4,5")))
(setq table
(tt:table (:col-widths '(50 40 60 80 120) :border 0)
(tt:header-row ()
(tt:cell (:col-span 5 :border 1)
(tt:paragraph (:h-align :centered :font-size 12)
"Cells with borders")))
(tt:row (:background-color :green)
(tt:cell (:row-span 2 :background-color :blue)
"1,1 2,1 row-span 2")
(tt:cell () "1,2")
(tt:cell (:col-span 2 :row-span 3 :background-color :red)
"1,3 1,4 - 3,3 3,4 col-span 2 row-span 3")
(tt:cell () "1,5"))
(tt:row ()
(tt:cell (:border 2) "2,2")
(tt:cell (:row-span 2 :background-color :blue) "2,5 3,5 row-span 2"))
(tt:row (:background-color :green)
(tt:cell (:col-span 2 :border 2) "3,1 3,2 col-span 2"))
(tt:row ()
(tt:cell (:border #(3 0 0 0)) "4,1 left-border 3")
(tt:cell (:border #(0 3 0 0)) "4,2 top-border 3")
(tt:cell (:border #(2 2 2 2)) "4,3 border #(2 2 2 2)")
(tt:cell (:border #(0 0 3 0)) "4,4 right-border 3")
(tt:cell (:border #(0 0 0 3)) "4,5 bottom-border 3"))
(tt:row ()
(tt:cell (:col-span 5 :border '(0 1/4))
(tt:paragraph (:h-align :justified :font-size 12)
"bottom" :hfill "cell" :hfill "spanning" :hfill "several" :hfill "rows"))))
)))
(draw-pages content :margins margins :break :after)
(pdf:write-document file)))
table)
(pdf:load-fonts)
(setq table (test-table (lw:current-pathname "examples/test-table.pdf")))
|#
|
