1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
;;; dsssl-flow.el --- DSSSL flow objects
;; Author: wmperry
;; Created: 1997/10/17 14:07:55
;; Version: 1.4
;; Keywords:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Copyright (c) 1996, 1997 by William M. Perry <wmperry@cs.indiana.edu>
;;; Copyright (c) 1997 by Free Software Foundation, Inc.
;;;
;;; This file is part of GNU Emacs.
;;;
;;; GNU Emacs is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2, or (at your option)
;;; any later version.
;;;
;;; GNU Emacs is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Emacs; see the file COPYING. If not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307, USA.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defstruct flow-object
(type 'unknown :read-only t) ; Name of this flow object
(properties nil)
(children nil)
(parent nil)
)
(defstruct dsssl-flow-processor
(name 'unknown :read-only t) ; Name of this processing backend
(init nil) ; initialize the backend
(handler nil) ; handle a single flow object
(sizeof nil) ; get size of a single flow object
(clean nil) ; cleanup instance of backend
)
(defvar dsssl-flow-active-faces nil)
(defvar dsssl-flow-active-voices nil)
(make-variable-buffer-local 'dsssl-flow-active-faces)
(make-variable-buffer-local 'dsssl-flow-active-voices)
(defun dsssl-flow-display (flows processor)
(let ((handler (dsssl-flow-processor-handler processor))
(flow-stack (list flows))
(content nil)
(node nil)
(last-object nil)
)
(while flow-stack
(setq content (pop flow-stack))
(dsssl-flow-progress-meter)
;; Handle the element's content
(while content
(dsssl-flow-progress-meter)
(if (stringp (car content))
(dsssl-flow-handle-string-content (pop content))
(setq node (pop content))
;; todo: collect all information about this flow object for faster
;; lookup later.
(push (dsssl-flow-face-for-element node) dsssl-flow-active-faces)
(push (dsssl-flow-voice-for-element node) dsssl-flow-active-voices))
(case (flow-object-type node)
;; Core DSSL components basic flow object classes
(sequence ; 12.6.1
)
(display-group ; 12.6.2
)
(paragraph ; 12.6.6
)
(paragraph-break ; 12.6.7
)
(external-graphic ; 12.6.15
)
;; DSSSL options required in DSSSL online
;; Simple page flow object class
(simple-page-sequence ; 12.6.3
)
;; Table flow object classes
(table ; 12.6.27.1
)
(table-part ; 12.6.27.2
)
(table-column ; 12.6.27.3
)
(table-row ; 12.6.27.5
)
(table-border ; 12.6.27.7
)
(table-cell ; 12.6.27.6
;; Do we need to handle table-cell at this level, or is that
;; something that the display backend needs to handle, and we
;; just query that in the `table-row' processor?
)
;; Online display flow object classes
(vertical-scroll ; 12.6.28.1
)
(multi-mode ; 12.6.28.2
)
(marginalia ; 12.6.28.4
)
;; Emacs/W3 specific flow objects
(applet ; Wow, Java
)
(script ; Scripts
)
(form-element ; Any form element
)
;; pinhead, flame, and cookie can now all be handled by
;; a stud-muffing DSSSL stylesheet - hooray!
;; Generic formatting - all things that can be fully specified
;; by a CSS stylesheet.
(otherwise
;; handle the content
(dsssl-flow-handle-content node)))))))
(provide 'dsssl-flow)
|
