forked from RobotLocomotion/styleguide
-
Notifications
You must be signed in to change notification settings - Fork 0
/
styleguide.xsl
924 lines (865 loc) · 37.7 KB
/
styleguide.xsl
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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:dcq="http://purl.org/dc/qualifiers/1.0/"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
xmlns:fn="http://www.w3.org/2005/xpath-functions">
<xsl:output method="html"/>
<!-- Set to 1 to show explanations by default. Set to 0 to hide them -->
<xsl:variable name="show_explanation_default" select="0" />
<!-- The characters within the Webdings font that show the triangles -->
<xsl:variable name="show_button_text" select="'▶'" />
<xsl:variable name="hide_button_text" select="'▽'" />
<!-- The suffix for names -->
<xsl:variable name="button_suffix" select="'__button'"/>
<xsl:variable name="body_suffix" select="'__body'"/>
<!-- For easy reference, the name of the button -->
<xsl:variable name="show_hide_all_button" select="'show_hide_all_button'"/>
<!-- The top-level element -->
<xsl:template match="GUIDE">
<HTML>
<HEAD>
<TITLE><xsl:value-of select="@title"/></TITLE>
<META http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<LINK HREF="https://www.google.com/favicon.ico" type="image/x-icon"
rel="shortcut icon"/>
<LINK HREF="styleguide.css"
type="text/css" rel="stylesheet"/>
<SCRIPT language="javascript" type="text/javascript">
function GetElementsByName(name) {
// Workaround a bug on old versions of opera.
if (document.getElementsByName) {
return document.getElementsByName(name);
} else {
return [document.getElementById(name)];
}
}
/**
* @param {string} namePrefix The prefix of the body name.
* @param {function(boolean): boolean} getVisibility Computes the new
* visibility state, given the current one.
*/
function ChangeVisibility(namePrefix, getVisibility) {
var bodyName = namePrefix + '<xsl:value-of select="$body_suffix"/>';
var buttonName = namePrefix + '<xsl:value-of select="$button_suffix"/>';
var bodyElements = GetElementsByName(bodyName);
var linkElement = GetElementsByName('link-' + buttonName)[0];
if (bodyElements.length != 1) {
throw Error('ShowHideByName() got the wrong number of bodyElements: ' +
bodyElements.length);
} else {
var bodyElement = bodyElements[0];
var buttonElement = GetElementsByName(buttonName)[0];
var isVisible = bodyElement.style.display != "none";
if (getVisibility(isVisible)) {
bodyElement.style.display = "inline";
linkElement.style.display = "block";
buttonElement.innerHTML = '<xsl:value-of select="$hide_button_text"/>';
} else {
bodyElement.style.display = "none";
linkElement.style.display = "none";
buttonElement.innerHTML = '<xsl:value-of select="$show_button_text"/>';
}
}
}
function ShowHideByName(namePrefix) {
ChangeVisibility(namePrefix, function(old) { return !old; });
}
function ShowByName(namePrefix) {
ChangeVisibility(namePrefix, function() { return true; });
}
function ShowHideAll() {
var allButton = GetElementsByName("show_hide_all_button")[0];
if (allButton.innerHTML == '<xsl:value-of select="$hide_button_text"/>') {
allButton.innerHTML = '<xsl:value-of select="$show_button_text"/>';
SetHiddenState(document.getElementsByTagName("body")[0].childNodes, "none", '<xsl:value-of select="$show_button_text"/>');
} else {
allButton.innerHTML = '<xsl:value-of select="$hide_button_text"/>';
SetHiddenState(document.getElementsByTagName("body")[0].childNodes, "inline", '<xsl:value-of select="$hide_button_text"/>');
}
}
// Recursively sets state of all children
// of a particular node.
function SetHiddenState(root, newState, newButton) {
for (var i = 0; i != root.length; i++) {
SetHiddenState(root[i].childNodes, newState, newButton);
if (root[i].className == 'showhide_button') {
root[i].innerHTML = newButton;
}
if (root[i].className == 'stylepoint_body' ||
root[i].className == 'link_button') {
root[i].style.display = newState;
}
}
}
function EndsWith(str, suffix) {
var l = str.length - suffix.length;
return l >= 0 && str.indexOf(suffix, l) == l;
}
function RefreshVisibilityFromHashParam() {
var hashRegexp = new RegExp('#([^&#]*)$');
var hashMatch = hashRegexp.exec(window.location.href);
var anchor = hashMatch && GetElementsByName(hashMatch[1])[0];
var node = anchor;
var suffix = '<xsl:value-of select="$body_suffix"/>';
while (node) {
var id = node.id;
var matched = id && EndsWith(id, suffix);
if (matched) {
var len = id.length - suffix.length;
ShowByName(id.substring(0, len));
if (anchor.scrollIntoView) {
anchor.scrollIntoView();
}
return;
}
node = node.parentNode;
}
}
window.onhashchange = RefreshVisibilityFromHashParam;
window.onload = function() {
// if the URL contains "?showall=y", expand the details of all children
var showHideAllRegex = new RegExp("[\\?&](showall)=([^&#]*)");
var showHideAllValue = showHideAllRegex.exec(window.location.href);
if (showHideAllValue != null) {
if (showHideAllValue[2] == "y") {
SetHiddenState(document.getElementsByTagName("body")[0].childNodes,
"inline", '<xsl:value-of select="$hide_button_text"/>');
} else {
SetHiddenState(document.getElementsByTagName("body")[0].childNodes,
"none", '<xsl:value-of select="$show_button_text"/>');
}
}
var showOneRegex = new RegExp("[\\?&](showone)=([^&#]*)");
var showOneValue = showOneRegex.exec(window.location.href);
if (showOneValue) {
ShowHideByName(showOneValue[2]);
}
RefreshVisibilityFromHashParam();
}
</SCRIPT>
</HEAD>
<BODY>
<H1><xsl:value-of select="@title"/></H1>
<xsl:apply-templates/>
</BODY>
</HTML>
</xsl:template>
<xsl:template match="OVERVIEW">
<xsl:variable name="button_text">
<xsl:choose>
<xsl:when test="$show_explanation_default">
<xsl:value-of select="$hide_button_text"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$show_button_text"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<DIV style="margin-left: 50%; font-size: 75%;">
<P>
Each style point has a summary for which additional information is available
by toggling the accompanying arrow button that looks this way:
<SPAN class="showhide_button" style="margin-left: 0; float: none">
<xsl:value-of select="$show_button_text"/></SPAN>.
You may toggle all summaries with the big arrow button:
</P>
<DIV style=" font-size: larger; margin-left: +2em;">
<SPAN class="showhide_button" style="font-size: 180%; float: none">
<xsl:attribute name="onclick"><xsl:value-of select="'javascript:ShowHideAll()'"/></xsl:attribute>
<xsl:attribute name="name"><xsl:value-of select="$show_hide_all_button"/></xsl:attribute>
<xsl:attribute name="id"><xsl:value-of select="$show_hide_all_button"/></xsl:attribute>
<xsl:value-of select="$button_text"/>
</SPAN>
Toggle all summaries
</DIV>
</DIV>
<xsl:call-template name="TOC">
<xsl:with-param name="root" select=".."/>
</xsl:call-template>
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="PARTING_WORDS">
<H2>Parting Words</H2>
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="CATEGORY">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<H2>
<xsl:variable name="category_name">
<xsl:call-template name="anchorname">
<xsl:with-param name="sectionname" select="@title"/>
</xsl:call-template>
</xsl:variable>
<xsl:attribute name="name"><xsl:value-of select="$category_name"/></xsl:attribute>
<xsl:attribute name="id"><xsl:value-of select="$category_name"/></xsl:attribute>
<xsl:value-of select="@title"/>
</H2>
<xsl:apply-templates/>
</DIV>
</xsl:template>
<xsl:template match="STYLEPOINT">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<xsl:variable name="stylepoint_name">
<xsl:call-template name="anchorname">
<xsl:with-param name="sectionname" select="@title"/>
</xsl:call-template>
</xsl:variable>
<xsl:variable name="button_text">
<xsl:choose>
<xsl:when test="$show_explanation_default">
<xsl:value-of select="$hide_button_text"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$show_button_text"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<H3>
<A>
<xsl:attribute name="name"><xsl:value-of select="$stylepoint_name"/></xsl:attribute>
<xsl:attribute name="id"><xsl:value-of select="$stylepoint_name"/></xsl:attribute>
<xsl:value-of select="@title"/>
</A>
</H3>
<xsl:variable name="buttonName">
<xsl:value-of select="$stylepoint_name"/><xsl:value-of select="$button_suffix"/>
</xsl:variable>
<xsl:variable name="onclick_definition">
<xsl:text>javascript:ShowHideByName('</xsl:text>
<xsl:value-of select="$stylepoint_name"/>
<xsl:text>')</xsl:text>
</xsl:variable>
<SPAN class="link_button" id="link-{$buttonName}" name="link-{$buttonName}">
<A>
<xsl:attribute name="href">?showone=<xsl:value-of select="$stylepoint_name"/>#<xsl:value-of select="$stylepoint_name"/></xsl:attribute>
link
</A>
</SPAN>
<SPAN class="showhide_button">
<xsl:attribute name="onclick"><xsl:value-of select="$onclick_definition"/></xsl:attribute>
<xsl:attribute name="name"><xsl:value-of select="$buttonName"/></xsl:attribute>
<xsl:attribute name="id"><xsl:value-of select="$buttonName"/></xsl:attribute>
<xsl:value-of select="$button_text"/>
</SPAN>
<xsl:apply-templates>
<xsl:with-param name="anchor_prefix" select="$stylepoint_name" />
</xsl:apply-templates>
</DIV>
</xsl:template>
<xsl:template match="SUMMARY">
<xsl:param name="anchor_prefix" />
<DIV style="display:inline;">
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<xsl:apply-templates/>
</DIV>
</xsl:template>
<xsl:template match="BODY">
<xsl:param name="anchor_prefix" />
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<DIV class="stylepoint_body">
<xsl:attribute name="name"><xsl:value-of select="$anchor_prefix"/><xsl:value-of select="$body_suffix"/></xsl:attribute>
<xsl:attribute name="id"><xsl:value-of select="$anchor_prefix"/><xsl:value-of select="$body_suffix"/></xsl:attribute>
<xsl:attribute name="style">
<xsl:choose>
<xsl:when test="$show_explanation_default">display: inline</xsl:when>
<xsl:otherwise>display: none</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:apply-templates/>
</DIV>
</DIV>
</xsl:template>
<xsl:template match="DEFINITION">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_section">Definition: </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="PROS">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_section">Pros: </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="CONS">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_section">Cons: </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="DECISION">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_section">Decision: </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="TODO">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<DIV style="font-size: 150%;">TODO:
<xsl:apply-templates/>
</DIV>
</P>
</xsl:template>
<xsl:template match="SUBSECTION">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_subsection"><xsl:value-of select="@title"/> </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="SUBSUBSECTION">
<P>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<SPAN class="stylepoint_subsubsection"><xsl:value-of select="@title"/> </SPAN>
<xsl:apply-templates/>
</P>
</xsl:template>
<xsl:template match="CODE_SNIPPET">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<PRE><xsl:call-template name="print_without_leading_chars">
<xsl:with-param name="text" select="."/>
<xsl:with-param name="strip" select="1"/>
<xsl:with-param name="is_firstline" select="1"/>
<xsl:with-param name="trim_count">
<xsl:call-template name="num_leading_spaces">
<xsl:with-param name="text" select="."/>
<xsl:with-param name="max_so_far" select="1000"/>
</xsl:call-template>
</xsl:with-param>
</xsl:call-template></PRE>
</DIV>
</xsl:template>
<xsl:template match="BAD_CODE_SNIPPET">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<PRE class="badcode"><xsl:call-template name="print_without_leading_chars">
<xsl:with-param name="text" select="."/>
<xsl:with-param name="strip" select="1"/>
<xsl:with-param name="is_firstline" select="1"/>
<xsl:with-param name="trim_count">
<xsl:call-template name="num_leading_spaces">
<xsl:with-param name="text" select="."/>
<xsl:with-param name="max_so_far" select="1000"/>
</xsl:call-template>
</xsl:with-param>
</xsl:call-template></PRE>
</DIV>
</xsl:template>
<xsl:template match="PY_CODE_SNIPPET">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<PRE><xsl:call-template name="print_python_code">
<xsl:with-param name="text" select="."/>
</xsl:call-template></PRE>
</DIV>
</xsl:template>
<xsl:template match="BAD_PY_CODE_SNIPPET">
<DIV>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<PRE class="badcode"><xsl:call-template name="print_python_code">
<xsl:with-param name="text" select="."/>
</xsl:call-template></PRE>
</DIV>
</xsl:template>
<xsl:template match="FUNCTION">
<xsl:call-template name="print_function_name">
<xsl:with-param name="text" select="."/>
</xsl:call-template>
</xsl:template>
<xsl:template match="SYNTAX">
<I>
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<xsl:apply-templates/>
</I>
</xsl:template>
<!-- This passes through any HTML elements that the
XML doc uses for minor formatting -->
<xsl:template match="a|address|blockquote|br|center|cite|code|dd|div|dl|dt|em|hr|i|img|li|ol|p|pre|span|table|td|th|tr|ul|var|A|ADDRESS|BLOCKQUOTE|BR|CENTER|CITE|CODE|DD|DIV|DL|DT|EM|HR|I|LI|OL|P|PRE|SPAN|TABLE|TD|TH|TR|UL|VAR">
<xsl:element name="{local-name()}">
<xsl:copy-of select="@*"/>
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
<!-- Builds the table of contents -->
<xsl:template name="TOC">
<xsl:param name="root"/>
<DIV class="toc">
<DIV class="toc_title">Table of Contents</DIV>
<TABLE>
<xsl:for-each select="$root/CATEGORY">
<TR valign="top">
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<TD>
<DIV class="toc_category">
<A>
<xsl:attribute name="href">
<xsl:text>#</xsl:text>
<xsl:call-template name="anchorname">
<xsl:with-param name="sectionname" select="@title"/>
</xsl:call-template>
</xsl:attribute>
<xsl:value-of select="@title"/>
</A>
</DIV>
</TD><TD>
<DIV class="toc_stylepoint">
<xsl:for-each select="./STYLEPOINT">
<SPAN style="padding-right: 1em; white-space:nowrap;">
<xsl:attribute name="class"><xsl:value-of select="@class"/></xsl:attribute>
<A>
<xsl:attribute name="href">
<xsl:text>#</xsl:text>
<xsl:call-template name="anchorname">
<xsl:with-param name="sectionname" select="@title"/>
</xsl:call-template>
</xsl:attribute>
<xsl:value-of select="@title"/>
</A>
</SPAN>
<xsl:text> </xsl:text>
</xsl:for-each>
</DIV>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</DIV>
</xsl:template>
<xsl:template name="TOC_one_stylepoint">
<xsl:param name="stylepoint"/>
</xsl:template>
<!-- Creates a standard anchor given any text.
Substitutes underscore for characters unsuitable for URLs -->
<xsl:template name="anchorname">
<xsl:param name="sectionname"/>
<!-- strange quoting necessary to strip apostrophes -->
<xsl:variable name="bad_characters" select="" ()#'""/>
<xsl:value-of select="translate($sectionname,$bad_characters,'_____')"/>
</xsl:template>
<!-- Given text, evaluates to the number of leading spaces. -->
<!-- TODO(csilvers): deal well with leading tabs (treat as 8 spaces?) -->
<xsl:template name="num_leading_spaces_one_line">
<xsl:param name="text"/>
<xsl:param name="current_count"/>
<xsl:choose>
<xsl:when test="starts-with($text, ' ')">
<xsl:call-template name="num_leading_spaces_one_line">
<xsl:with-param name="text" select="substring($text, 2)"/>
<xsl:with-param name="current_count" select="$current_count + 1"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$current_count"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Given a block of text, each line terminated by \n, evaluates to
the indentation-level of that text; that is, the largest number
n such that every non-blank line starts with at least n spaces. -->
<xsl:template name="num_leading_spaces">
<xsl:param name="text"/>
<xsl:param name="max_so_far"/>
<!-- TODO(csilvers): deal with case text doesn't end in a newline -->
<xsl:variable name="line" select="substring-before($text, '
')"/>
<xsl:variable name="rest" select="substring-after($text, '
')"/>
<xsl:variable name="num_spaces_this_line">
<xsl:choose>
<xsl:when test="$line=''">
<xsl:value-of select="$max_so_far"/>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="num_leading_spaces_one_line">
<xsl:with-param name="text" select="$line"/>
<xsl:with-param name="current_count" select="0"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="new_max_so_far">
<xsl:choose>
<xsl:when test="$num_spaces_this_line < $max_so_far">
<xsl:value-of select="$num_spaces_this_line"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$max_so_far"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<!-- now check if we're on the last line, and if not, recurse -->
<xsl:if test="$rest=''">
<xsl:value-of select="$new_max_so_far"/>
</xsl:if>
<xsl:if test="not($rest='')">
<xsl:call-template name="num_leading_spaces">
<xsl:with-param name="text" select="$rest"/>
<xsl:with-param name="max_so_far" select="$new_max_so_far"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
<!-- Given text, determine the starting position of code.
This similar to num_leading_spaces_one_line but treats "Yes:" and "No:"
as spaces. Also, if there is no code on the first line, it searches
subsequent lines until a non-empty line is found.
Used to find the start of code in snippets like:
Yes: if(foo):
No : if(foo):
As well as:
Yes:
if (foo):
-->
<xsl:template name="code_start_index">
<xsl:param name="text"/>
<xsl:param name="current_count"/>
<xsl:choose>
<xsl:when test="starts-with($text, ' ')">
<xsl:call-template name="code_start_index">
<xsl:with-param name="text" select="substring($text, 2)"/>
<xsl:with-param name="current_count" select="$current_count + 1"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="starts-with($text, 'Yes:')">
<xsl:call-template name="code_start_index">
<xsl:with-param name="text" select="substring($text, 5)"/>
<xsl:with-param name="current_count" select="$current_count + 4"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="starts-with($text, 'No:')">
<xsl:call-template name="code_start_index">
<xsl:with-param name="text" select="substring($text, 4)"/>
<xsl:with-param name="current_count" select="$current_count + 3"/>
</xsl:call-template>
</xsl:when>
<!-- This is only reached if the first line is entirely whitespace or
contains nothing but "Yes:" or "No:"-->
<xsl:when test="starts-with($text, '
')">
<xsl:call-template name="code_start_index">
<xsl:with-param name="text" select="substring($text, 2)"/>
<xsl:with-param name="current_count" select="0"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$current_count"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Helper for ends_with_colon. Determine whether the given line is nothing
but spaces and python-style comments. -->
<xsl:template name="is_blank_or_comment">
<xsl:param name="line"/>
<xsl:choose>
<xsl:when test="$line = ''">
<xsl:value-of select="1"/>
</xsl:when>
<xsl:when test="starts-with($line, '
')">
<xsl:value-of select="1"/>
</xsl:when>
<xsl:when test="starts-with($line, '#')">
<xsl:value-of select="1"/>
</xsl:when>
<xsl:when test="starts-with($line, ' ')">
<xsl:call-template name="is_blank_or_comment">
<xsl:with-param name="line" select="substring($line, 2)"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="0"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Determine whether the given line ends with a colon. Note that Python
style comments are ignored so the following lines return True:
- def foo():
- def foo(): # Bar
- if(foo):
But some code may confuse this function. For example the following are
also consider to "end_with_colon" even though they don't for Python
- foo(": #")
- foo() # No need for :
-->
<xsl:template name="ends_with_colon">
<xsl:param name="line"/>
<xsl:param name="found_colon"/>
<xsl:choose>
<xsl:when test="$line = ''">
<xsl:value-of select="$found_colon"/>
</xsl:when>
<xsl:when test="starts-with($line, '
')">
<xsl:value-of select="$found_colon"/>
</xsl:when>
<xsl:when test="starts-with($line, ' ')">
<xsl:call-template name="ends_with_colon">
<xsl:with-param name="line" select="substring($line, 2)"/>
<xsl:with-param name="found_colon" select="$found_colon"/>
</xsl:call-template>
</xsl:when>
<xsl:when test="starts-with($line, ':')">
<xsl:variable name="rest_is_comment">
<xsl:call-template name="is_blank_or_comment">
<xsl:with-param name="line" select="substring($line, 2)"/>
</xsl:call-template>
</xsl:variable>
<xsl:choose>
<xsl:when test="$rest_is_comment = '1'">
<xsl:value-of select="1"/>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="ends_with_colon">
<xsl:with-param name="line" select="substring($line, 2)"/>
<xsl:with-param name="found_colon" select="0"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="ends_with_colon">
<xsl:with-param name="line" select="substring($line, 2)"/>
<xsl:with-param name="found_colon" select="0"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Prints one line of python code with proper indent and calls itself
recursively for the rest of the text.
This template uses "a", "b", "c" and "d" to refer to four key column
numbers. They are:
- a: the indentation common to all lines in a code snippet. This is
stripped out to allow for cleaner code in the xml.
- b: the indentation of the most out-dented line of code. This is
different from "a" when code is labelled with "Yes:" or "No:"
- c: the indentation of the current python block, in other words, the
indentation of the first line of this block, which is the
indentation of the last line we saw that ended with a colon.
- d: the "total" indentation of the line, ignorng possible "Yes:" or
"No:" text on the line.
For example, for the last line of the following code snippet, the
positions of a, b, c and d are indicated below:
Yes: def Foo():
if bar():
a += 1
baz()
a b c d
The algorithm is:
1) Split the text into first line and the rest. Note that the
substring-before function is supposed to handle the case where the
character is not present in the string but does not so we
automatically ignore the last line of the snippet which is always
empty (the closing snippet tag). This is consistent with the
behavior or print_without_leading_chars.
2) If the current is empty (only whitespace), print newline and call
itself recursively on the rest of the text with the rest of the
parameters unchanged.
3) Otherwise, measure "d"
4) Measure "c" by taking:
- the value of "d" if the previous line ended with a colon or the
current line is outdented compare to the previous line
- the indent of the previous line otherwise
5) Print line[a:c] (Note that we ignore line[0:a])
6) Print line[b:c] in an external span (in order to double the block
indent in external code).
7) Print line[c:<end>] with function names processed to produce both
internal and external names.
8) If there are more lines, recurse.
-->
<xsl:template name="print_python_line_recursively">
<xsl:param name="text"/>
<xsl:param name="a"/>
<xsl:param name="b"/>
<xsl:param name="previous_indent"/>
<xsl:param name="previous_ends_with_colon"/>
<xsl:param name="is_first_line"/>
<xsl:variable name="line" select="substring-before($text, '
')"/>
<xsl:variable name="rest" select="substring-after($text, '
')"/>
<xsl:choose>
<xsl:when test="substring($line, $b) = '' and not($rest = '')">
<xsl:if test="not($is_first_line = '1')">
<xsl:text>
</xsl:text>
</xsl:if>
<xsl:call-template name="print_python_line_recursively">
<xsl:with-param name="text" select="$rest"/>
<xsl:with-param name="a" select="$a"/>
<xsl:with-param name="b" select="$b"/>
<xsl:with-param name="previous_indent" select="$previous_indent"/>
<xsl:with-param name="previous_ends_with_colon"
select="$previous_ends_with_colon"/>
<xsl:with-param name="is_first_line" select="0"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:variable name="indent_after_b">
<xsl:call-template name="num_leading_spaces_one_line">
<xsl:with-param name="text" select="substring($line, $b + 1)"/>
<xsl:with-param name="current_count" select="0"/>
</xsl:call-template>
</xsl:variable>
<xsl:variable name="d" select="$b + $indent_after_b"/>
<xsl:variable name="c">
<xsl:choose>
<xsl:when test="$previous_ends_with_colon = '1' or
$previous_indent > $d">
<xsl:value-of select="$d"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$previous_indent"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:value-of select="substring($line, $a + 1, $c - $a)"/>
<span class="external">
<xsl:value-of select="substring($line, $b + 1, $c - $b)"/>
</span>
<xsl:call-template name="munge_function_names_in_text">
<xsl:with-param name="stripped_line"
select="substring($line, $c + 1)"/>
</xsl:call-template>
<xsl:if test="not(substring($rest, $a) = '')">
<xsl:text>
</xsl:text>
<xsl:call-template name="print_python_line_recursively">
<xsl:with-param name="text" select="$rest"/>
<xsl:with-param name="a" select="$a"/>
<xsl:with-param name="b" select="$b"/>
<xsl:with-param name="previous_indent" select="$c"/>
<xsl:with-param name="previous_ends_with_colon">
<xsl:call-template name="ends_with_colon">
<xsl:with-param name="line" select="$line"/>
<xsl:with-param name="found_colon" select="0"/>
</xsl:call-template>
</xsl:with-param>
<xsl:with-param name="is_first_line" select="0"/>
</xsl:call-template>
</xsl:if>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Print python code with internal and external styles.
In order to conform with PEP-8 externally, we identify 2-space indents
and an external-only 4-space indent.
Function names that are marked with $$FunctionName/$$ have an external
lower_with_underscore version added. -->
<xsl:template name="print_python_code">
<xsl:param name="text"/>
<xsl:variable name="a">
<xsl:call-template name="num_leading_spaces">
<xsl:with-param name="text" select="."/>
<xsl:with-param name="max_so_far" select="1000"/>
</xsl:call-template>
</xsl:variable>
<xsl:variable name="b">
<xsl:call-template name="code_start_index">
<xsl:with-param name="text" select="$text"/>
<xsl:with-param name="current_count" select="0"/>
</xsl:call-template>
</xsl:variable>
<xsl:call-template name="print_python_line_recursively">
<xsl:with-param name="text" select="$text"/>
<xsl:with-param name="a" select="$a"/>
<xsl:with-param name="b" select="$b"/>
<xsl:with-param name="previous_indent" select="$b"/>
<xsl:with-param name="previous_ends_with_colon" select="0"/>
<xsl:with-param name="is_first_line" select="1"/>
</xsl:call-template>
</xsl:template>
<!-- Given a block of text, each line terminated by \n, and a number n,
emits the text with the first n characters of each line
deleted. If strip==1, then we omit blank lines at the beginning
and end of the text (but not the middle!) -->
<!-- TODO(csilvers): deal well with leading tabs (treat as 8 spaces?) -->
<xsl:template name="print_without_leading_chars">
<xsl:param name="text"/>
<xsl:param name="trim_count"/>
<xsl:param name="strip"/>
<xsl:param name="is_firstline"/>
<!-- TODO(csilvers): deal with case text doesn't end in a newline -->
<xsl:variable name="line" select="substring-before($text, '
')"/>
<xsl:variable name="rest" select="substring-after($text, '
')"/>
<xsl:variable name="stripped_line" select="substring($line, $trim_count+1)"/>
<xsl:choose>
<!-- $line (or $rest) is considered empty if we'd trim the entire line -->
<xsl:when test="($strip = '1') and ($is_firstline = '1') and
(string-length($line) <= $trim_count)">
</xsl:when>
<xsl:when test="($strip = '1') and
(string-length($rest) <= $trim_count)">
<xsl:value-of select="$stripped_line"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$stripped_line"/>
<xsl:text>
</xsl:text>
</xsl:otherwise>
</xsl:choose>
<xsl:if test="not($rest='')">
<xsl:call-template name="print_without_leading_chars">
<xsl:with-param name="text" select="$rest"/>
<xsl:with-param name="trim_count" select="$trim_count"/>
<xsl:with-param name="strip" select="$strip"/>
<xsl:with-param name="is_firstline" select="0"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
<!-- Given a line of code, find function names that are marked with $$ /$$ and
print out the line with the internal and external versions of the
function names.-->
<xsl:template name="munge_function_names_in_text">
<xsl:param name="stripped_line"/>
<xsl:choose>
<xsl:when test="contains($stripped_line, '$$')">
<xsl:value-of select="substring-before($stripped_line, '$$')"/>
<xsl:call-template name="print_function_name">
<xsl:with-param name="text" select="substring-after(substring-before($stripped_line, '/$$'), '$$')"/>
</xsl:call-template>
<xsl:call-template name="munge_function_names_in_text">
<xsl:with-param name="stripped_line" select="substring-after($stripped_line, '/$$')"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$stripped_line"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<!-- Given a function name, print out both the internal and external version
of the function name in their respective spans.-->
<xsl:template name="print_function_name">
<xsl:param name="text"/>
<xsl:call-template name="convert_camel_case_to_lowercase_with_under">
<xsl:with-param name="text" select="$text"/>
</xsl:call-template>
</xsl:template>
<!-- Given a single word of text convert it from CamelCase to
lower_with_under.
This means replacing each uppercase character with _ followed by the
lowercase version except for the first character which is replaced
without adding the _.-->
<xsl:template name="convert_camel_case_to_lowercase_with_under">
<xsl:param name="text"/>
<xsl:param name="is_recursive_call"/>
<xsl:variable name="first_char" select="substring($text, 1, 1)"/>
<xsl:variable name="rest" select="substring($text, 2)"/>
<xsl:choose>
<xsl:when test="contains('ABCDEFGHIJKLMNOPQRSTUVWXYZ', $first_char)">
<xsl:if test="$is_recursive_call='1'">
<xsl:text>_</xsl:text>
</xsl:if>
<xsl:value-of select="translate($first_char, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$first_char" />
</xsl:otherwise>
</xsl:choose>
<xsl:if test="not($rest='')">
<xsl:call-template name="convert_camel_case_to_lowercase_with_under">
<xsl:with-param name="text" select="$rest"/>
<xsl:with-param name="is_recursive_call" select="1"/>
</xsl:call-template>
</xsl:if>
</xsl:template>
</xsl:stylesheet>