-
-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
Copy pathindex.js
1063 lines (891 loc) · 32.7 KB
/
index.js
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
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* Copyright 2012-2018, Plotly, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
var d3 = require('d3');
var isNumeric = require('fast-isnumeric');
var tinycolor = require('tinycolor2');
var Registry = require('../../registry');
var Color = require('../color');
var Colorscale = require('../colorscale');
var Lib = require('../../lib');
var svgTextUtils = require('../../lib/svg_text_utils');
var xmlnsNamespaces = require('../../constants/xmlns_namespaces');
var alignment = require('../../constants/alignment');
var LINE_SPACING = alignment.LINE_SPACING;
var DESELECTDIM = require('../../constants/interactions').DESELECTDIM;
var subTypes = require('../../traces/scatter/subtypes');
var makeBubbleSizeFn = require('../../traces/scatter/make_bubble_size_func');
var drawing = module.exports = {};
// -----------------------------------------------------
// styling functions for plot elements
// -----------------------------------------------------
drawing.font = function(s, family, size, color) {
// also allow the form font(s, {family, size, color})
if(Lib.isPlainObject(family)) {
color = family.color;
size = family.size;
family = family.family;
}
if(family) s.style('font-family', family);
if(size + 1) s.style('font-size', size + 'px');
if(color) s.call(Color.fill, color);
};
/*
* Positioning helpers
* Note: do not use `setPosition` with <text> nodes modified by
* `svgTextUtils.convertToTspans`. Use `svgTextUtils.positionText`
* instead, so that <tspan.line> elements get updated to match.
*/
drawing.setPosition = function(s, x, y) { s.attr('x', x).attr('y', y); };
drawing.setSize = function(s, w, h) { s.attr('width', w).attr('height', h); };
drawing.setRect = function(s, x, y, w, h) {
s.call(drawing.setPosition, x, y).call(drawing.setSize, w, h);
};
/** Translate node
*
* @param {object} d : calcdata point item
* @param {sel} sel : d3 selction of node to translate
* @param {object} xa : corresponding full xaxis object
* @param {object} ya : corresponding full yaxis object
*
* @return {boolean} :
* true if selection got translated
* false if selection could not get translated
*/
drawing.translatePoint = function(d, sel, xa, ya) {
var x = xa.c2p(d.x);
var y = ya.c2p(d.y);
if(isNumeric(x) && isNumeric(y) && sel.node()) {
// for multiline text this works better
if(sel.node().nodeName === 'text') {
sel.attr('x', x).attr('y', y);
} else {
sel.attr('transform', 'translate(' + x + ',' + y + ')');
}
} else {
return false;
}
return true;
};
drawing.translatePoints = function(s, xa, ya) {
s.each(function(d) {
var sel = d3.select(this);
drawing.translatePoint(d, sel, xa, ya);
});
};
drawing.hideOutsideRangePoint = function(d, sel, xa, ya, xcalendar, ycalendar) {
sel.attr(
'display',
(xa.isPtWithinRange(d, xcalendar) && ya.isPtWithinRange(d, ycalendar)) ? null : 'none'
);
};
drawing.hideOutsideRangePoints = function(traceGroups, subplot, selector) {
if(!subplot._hasClipOnAxisFalse) return;
selector = selector || '.point,.textpoint';
var xa = subplot.xaxis;
var ya = subplot.yaxis;
traceGroups.each(function(d) {
var trace = d[0].trace;
var xcalendar = trace.xcalendar;
var ycalendar = trace.ycalendar;
traceGroups.selectAll(selector).each(function(d) {
drawing.hideOutsideRangePoint(d, d3.select(this), xa, ya, xcalendar, ycalendar);
});
});
};
drawing.crispRound = function(gd, lineWidth, dflt) {
// for lines that disable antialiasing we want to
// make sure the width is an integer, and at least 1 if it's nonzero
if(!lineWidth || !isNumeric(lineWidth)) return dflt || 0;
// but not for static plots - these don't get antialiased anyway.
if(gd._context.staticPlot) return lineWidth;
if(lineWidth < 1) return 1;
return Math.round(lineWidth);
};
drawing.singleLineStyle = function(d, s, lw, lc, ld) {
s.style('fill', 'none');
var line = (((d || [])[0] || {}).trace || {}).line || {},
lw1 = lw || line.width||0,
dash = ld || line.dash || '';
Color.stroke(s, lc || line.color);
drawing.dashLine(s, dash, lw1);
};
drawing.lineGroupStyle = function(s, lw, lc, ld) {
s.style('fill', 'none')
.each(function(d) {
var line = (((d || [])[0] || {}).trace || {}).line || {},
lw1 = lw || line.width||0,
dash = ld || line.dash || '';
d3.select(this)
.call(Color.stroke, lc || line.color)
.call(drawing.dashLine, dash, lw1);
});
};
drawing.dashLine = function(s, dash, lineWidth) {
lineWidth = +lineWidth || 0;
dash = drawing.dashStyle(dash, lineWidth);
s.style({
'stroke-dasharray': dash,
'stroke-width': lineWidth + 'px'
});
};
drawing.dashStyle = function(dash, lineWidth) {
lineWidth = +lineWidth || 1;
var dlw = Math.max(lineWidth, 3);
if(dash === 'solid') dash = '';
else if(dash === 'dot') dash = dlw + 'px,' + dlw + 'px';
else if(dash === 'dash') dash = (3 * dlw) + 'px,' + (3 * dlw) + 'px';
else if(dash === 'longdash') dash = (5 * dlw) + 'px,' + (5 * dlw) + 'px';
else if(dash === 'dashdot') {
dash = (3 * dlw) + 'px,' + dlw + 'px,' + dlw + 'px,' + dlw + 'px';
}
else if(dash === 'longdashdot') {
dash = (5 * dlw) + 'px,' + (2 * dlw) + 'px,' + dlw + 'px,' + (2 * dlw) + 'px';
}
// otherwise user wrote the dasharray themselves - leave it be
return dash;
};
// Same as fillGroupStyle, except in this case the selection may be a transition
drawing.singleFillStyle = function(sel) {
var node = d3.select(sel.node());
var data = node.data();
var fillcolor = (((data[0] || [])[0] || {}).trace || {}).fillcolor;
if(fillcolor) {
sel.call(Color.fill, fillcolor);
}
};
drawing.fillGroupStyle = function(s) {
s.style('stroke-width', 0)
.each(function(d) {
var shape = d3.select(this);
try {
shape.call(Color.fill, d[0].trace.fillcolor);
}
catch(e) {
Lib.error(e, s);
shape.remove();
}
});
};
var SYMBOLDEFS = require('./symbol_defs');
drawing.symbolNames = [];
drawing.symbolFuncs = [];
drawing.symbolNeedLines = {};
drawing.symbolNoDot = {};
drawing.symbolNoFill = {};
drawing.symbolList = [];
Object.keys(SYMBOLDEFS).forEach(function(k) {
var symDef = SYMBOLDEFS[k];
drawing.symbolList = drawing.symbolList.concat(
[symDef.n, k, symDef.n + 100, k + '-open']);
drawing.symbolNames[symDef.n] = k;
drawing.symbolFuncs[symDef.n] = symDef.f;
if(symDef.needLine) {
drawing.symbolNeedLines[symDef.n] = true;
}
if(symDef.noDot) {
drawing.symbolNoDot[symDef.n] = true;
}
else {
drawing.symbolList = drawing.symbolList.concat(
[symDef.n + 200, k + '-dot', symDef.n + 300, k + '-open-dot']);
}
if(symDef.noFill) {
drawing.symbolNoFill[symDef.n] = true;
}
});
var MAXSYMBOL = drawing.symbolNames.length,
// add a dot in the middle of the symbol
DOTPATH = 'M0,0.5L0.5,0L0,-0.5L-0.5,0Z';
drawing.symbolNumber = function(v) {
if(typeof v === 'string') {
var vbase = 0;
if(v.indexOf('-open') > 0) {
vbase = 100;
v = v.replace('-open', '');
}
if(v.indexOf('-dot') > 0) {
vbase += 200;
v = v.replace('-dot', '');
}
v = drawing.symbolNames.indexOf(v);
if(v >= 0) { v += vbase; }
}
if((v % 100 >= MAXSYMBOL) || v >= 400) { return 0; }
return Math.floor(Math.max(v, 0));
};
function makePointPath(symbolNumber, r) {
var base = symbolNumber % 100;
return drawing.symbolFuncs[base](r) + (symbolNumber >= 200 ? DOTPATH : '');
}
function singlePointStyle(d, sel, trace, markerScale, lineScale, marker, markerLine, gd) {
if(Registry.traceIs(trace, 'symbols')) {
var sizeFn = makeBubbleSizeFn(trace);
sel.attr('d', function(d) {
var r;
// handle multi-trace graph edit case
if(d.ms === 'various' || marker.size === 'various') {
r = 3;
} else {
r = subTypes.isBubble(trace) ?
sizeFn(d.ms) : (marker.size || 6) / 2;
}
// store the calculated size so hover can use it
d.mrc = r;
// turn the symbol into a sanitized number
var x = drawing.symbolNumber(d.mx || marker.symbol) || 0;
// save if this marker is open
// because that impacts how to handle colors
d.om = x % 200 >= 100;
return makePointPath(x, r);
});
}
sel.style('opacity', function(d) {
return (d.mo + 1 || marker.opacity + 1) - 1;
});
var perPointGradient = false;
// 'so' is suspected outliers, for box plots
var fillColor,
lineColor,
lineWidth;
if(d.so) {
lineWidth = markerLine.outlierwidth;
lineColor = markerLine.outliercolor;
fillColor = marker.outliercolor;
}
else {
lineWidth = (d.mlw + 1 || markerLine.width + 1 ||
// TODO: we need the latter for legends... can we get rid of it?
(d.trace ? d.trace.marker.line.width : 0) + 1) - 1;
if('mlc' in d) lineColor = d.mlcc = lineScale(d.mlc);
// weird case: array wasn't long enough to apply to every point
else if(Lib.isArrayOrTypedArray(markerLine.color)) lineColor = Color.defaultLine;
else lineColor = markerLine.color;
if(Lib.isArrayOrTypedArray(marker.color)) {
fillColor = Color.defaultLine;
perPointGradient = true;
}
if('mc' in d) fillColor = d.mcc = markerScale(d.mc);
else fillColor = marker.color || 'rgba(0,0,0,0)';
}
if(d.om) {
// open markers can't have zero linewidth, default to 1px,
// and use fill color as stroke color
sel.call(Color.stroke, fillColor)
.style({
'stroke-width': (lineWidth || 1) + 'px',
fill: 'none'
});
}
else {
sel.style('stroke-width', lineWidth + 'px');
var markerGradient = marker.gradient;
var gradientType = d.mgt;
if(gradientType) perPointGradient = true;
else gradientType = markerGradient && markerGradient.type;
if(gradientType && gradientType !== 'none') {
var gradientColor = d.mgc;
if(gradientColor) perPointGradient = true;
else gradientColor = markerGradient.color;
var gradientID = 'g' + gd._fullLayout._uid + '-' + trace.uid;
if(perPointGradient) gradientID += '-' + d.i;
sel.call(drawing.gradient, gd, gradientID, gradientType, fillColor, gradientColor);
}
else {
sel.call(Color.fill, fillColor);
}
if(lineWidth) {
sel.call(Color.stroke, lineColor);
}
}
}
var HORZGRADIENT = {x1: 1, x2: 0, y1: 0, y2: 0};
var VERTGRADIENT = {x1: 0, x2: 0, y1: 1, y2: 0};
drawing.gradient = function(sel, gd, gradientID, type, color1, color2) {
var gradient = gd._fullLayout._defs.select('.gradients')
.selectAll('#' + gradientID)
.data([type + color1 + color2], Lib.identity);
gradient.exit().remove();
gradient.enter()
.append(type === 'radial' ? 'radialGradient' : 'linearGradient')
.each(function() {
var el = d3.select(this);
if(type === 'horizontal') el.attr(HORZGRADIENT);
else if(type === 'vertical') el.attr(VERTGRADIENT);
el.attr('id', gradientID);
var tc1 = tinycolor(color1);
var tc2 = tinycolor(color2);
el.append('stop').attr({
offset: '0%',
'stop-color': Color.tinyRGB(tc2),
'stop-opacity': tc2.getAlpha()
});
el.append('stop').attr({
offset: '100%',
'stop-color': Color.tinyRGB(tc1),
'stop-opacity': tc1.getAlpha()
});
});
sel.style({
fill: 'url(#' + gradientID + ')',
'fill-opacity': null
});
};
/*
* Make the gradients container and clear out any previous gradients.
* We never collect all the gradients we need in one place,
* so we can't ever remove gradients that have stopped being useful,
* except all at once before a full redraw.
* The upside of this is arbitrary points can share gradient defs
*/
drawing.initGradients = function(gd) {
var gradientsGroup = Lib.ensureSingle(gd._fullLayout._defs, 'g', 'gradients');
gradientsGroup.selectAll('linearGradient,radialGradient').remove();
};
drawing.singlePointStyle = function(d, sel, trace, markerScale, lineScale, gd) {
var marker = trace.marker;
singlePointStyle(d, sel, trace, markerScale, lineScale, marker, marker.line, gd);
};
drawing.pointStyle = function(s, trace, gd) {
if(!s.size()) return;
// allow array marker and marker line colors to be
// scaled by given max and min to colorscales
var marker = trace.marker;
var markerScale = drawing.tryColorscale(marker, '');
var lineScale = drawing.tryColorscale(marker, 'line');
s.each(function(d) {
drawing.singlePointStyle(d, d3.select(this), trace, markerScale, lineScale, gd);
});
};
drawing.makeSelectedPointStyleFns = function(trace) {
var out = {};
var selectedAttrs = trace.selected || {};
var unselectedAttrs = trace.unselected || {};
var marker = trace.marker || {};
var selectedMarker = selectedAttrs.marker || {};
var unselectedMarker = unselectedAttrs.marker || {};
var mo = marker.opacity;
var smo = selectedMarker.opacity;
var usmo = unselectedMarker.opacity;
var smoIsDefined = smo !== undefined;
var usmoIsDefined = usmo !== undefined;
out.opacityFn = function(d) {
var dmo = d.mo;
var dmoIsDefined = dmo !== undefined;
if(dmoIsDefined || smoIsDefined || usmoIsDefined) {
if(d.selected) {
if(smoIsDefined) return smo;
} else {
if(usmoIsDefined) return usmo;
return DESELECTDIM * (dmoIsDefined ? dmo : mo);
}
}
};
var smc = selectedMarker.color;
var usmc = unselectedMarker.color;
if(smc || usmc) {
out.colorFn = function(d) {
if(d.selected) {
if(smc) return smc;
} else {
if(usmc) return usmc;
}
};
}
var sms = selectedMarker.size;
var usms = unselectedMarker.size;
var smsIsDefined = sms !== undefined;
var usmsIsDefined = usms !== undefined;
if(smsIsDefined || usmsIsDefined) {
out.sizeFn = function(d) {
var mrc = d.mrc;
if(d.selected) {
return smsIsDefined ? sms / 2 : mrc;
} else {
return usmsIsDefined ? usms / 2 : mrc;
}
};
}
return out;
};
drawing.selectedPointStyle = function(s, trace) {
if(!s.size() || !trace.selectedpoints) return;
var fns = drawing.makeSelectedPointStyleFns(trace);
var marker = trace.marker || {};
s.each(function(d) {
var pt = d3.select(this);
var mo2 = fns.opacityFn(d);
if(mo2 !== undefined) pt.style('opacity', mo2);
});
if(fns.colorFn) {
s.each(function(d) {
var pt = d3.select(this);
var mc2 = fns.colorFn(d);
if(mc2) Color.fill(pt, mc2);
});
}
if(Registry.traceIs(trace, 'symbols') && fns.sizeFn) {
s.each(function(d) {
var pt = d3.select(this);
var mx = d.mx || marker.symbol || 0;
var mrc2 = fns.sizeFn(d);
pt.attr('d', makePointPath(drawing.symbolNumber(mx), mrc2));
// save for selectedTextStyle
d.mrc2 = mrc2;
});
}
};
drawing.tryColorscale = function(marker, prefix) {
var cont = prefix ? Lib.nestedProperty(marker, prefix).get() : marker,
scl = cont.colorscale,
colorArray = cont.color;
if(scl && Lib.isArrayOrTypedArray(colorArray)) {
return Colorscale.makeColorScaleFunc(
Colorscale.extractScale(scl, cont.cmin, cont.cmax)
);
}
else return Lib.identity;
};
var TEXTOFFSETSIGN = {start: 1, end: -1, middle: 0, bottom: 1, top: -1};
function textPointPosition(s, textPosition, fontSize, markerRadius) {
var group = d3.select(s.node().parentNode);
var v = textPosition.indexOf('top') !== -1 ?
'top' :
textPosition.indexOf('bottom') !== -1 ? 'bottom' : 'middle';
var h = textPosition.indexOf('left') !== -1 ?
'end' :
textPosition.indexOf('right') !== -1 ? 'start' : 'middle';
// if markers are shown, offset a little more than
// the nominal marker size
// ie 2/1.6 * nominal, bcs some markers are a bit bigger
var r = markerRadius ? markerRadius / 0.8 + 1 : 0;
var numLines = (svgTextUtils.lineCount(s) - 1) * LINE_SPACING + 1;
var dx = TEXTOFFSETSIGN[h] * r;
var dy = fontSize * 0.75 + TEXTOFFSETSIGN[v] * r +
(TEXTOFFSETSIGN[v] - 1) * numLines * fontSize / 2;
// fix the overall text group position
s.attr('text-anchor', h);
group.attr('transform', 'translate(' + dx + ',' + dy + ')');
}
function extracTextFontSize(d, trace) {
var fontSize = d.ts || trace.textfont.size;
return (isNumeric(fontSize) && fontSize > 0) ? fontSize : 0;
}
// draw text at points
drawing.textPointStyle = function(s, trace, gd) {
s.each(function(d) {
var p = d3.select(this);
var text = Lib.extractOption(d, trace, 'tx', 'text');
if(!text) {
p.remove();
return;
}
var pos = d.tp || trace.textposition;
var fontSize = extracTextFontSize(d, trace);
p.call(drawing.font,
d.tf || trace.textfont.family,
fontSize,
d.tc || trace.textfont.color)
.text(text)
.call(svgTextUtils.convertToTspans, gd)
.call(textPointPosition, pos, fontSize, d.mrc);
});
};
drawing.selectedTextStyle = function(s, trace) {
if(!s.size() || !trace.selectedpoints) return;
var selectedAttrs = trace.selected || {};
var unselectedAttrs = trace.unselected || {};
s.each(function(d) {
var tx = d3.select(this);
var tc = d.tc || trace.textfont.color;
var tp = d.tp || trace.textposition;
var fontSize = extracTextFontSize(d, trace);
var stc = (selectedAttrs.textfont || {}).color;
var utc = (unselectedAttrs.textfont || {}).color;
var tc2;
if(d.selected) {
if(stc) tc2 = stc;
} else {
if(utc) tc2 = utc;
else if(!stc) tc2 = Color.addOpacity(tc, DESELECTDIM);
}
if(tc2) Color.fill(tx, tc2);
textPointPosition(tx, tp, fontSize, d.mrc2 || d.mrc);
});
};
// generalized Catmull-Rom splines, per
// http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
var CatmullRomExp = 0.5;
drawing.smoothopen = function(pts, smoothness) {
if(pts.length < 3) { return 'M' + pts.join('L');}
var path = 'M' + pts[0],
tangents = [], i;
for(i = 1; i < pts.length - 1; i++) {
tangents.push(makeTangent(pts[i - 1], pts[i], pts[i + 1], smoothness));
}
path += 'Q' + tangents[0][0] + ' ' + pts[1];
for(i = 2; i < pts.length - 1; i++) {
path += 'C' + tangents[i - 2][1] + ' ' + tangents[i - 1][0] + ' ' + pts[i];
}
path += 'Q' + tangents[pts.length - 3][1] + ' ' + pts[pts.length - 1];
return path;
};
drawing.smoothclosed = function(pts, smoothness) {
if(pts.length < 3) { return 'M' + pts.join('L') + 'Z'; }
var path = 'M' + pts[0],
pLast = pts.length - 1,
tangents = [makeTangent(pts[pLast],
pts[0], pts[1], smoothness)],
i;
for(i = 1; i < pLast; i++) {
tangents.push(makeTangent(pts[i - 1], pts[i], pts[i + 1], smoothness));
}
tangents.push(
makeTangent(pts[pLast - 1], pts[pLast], pts[0], smoothness)
);
for(i = 1; i <= pLast; i++) {
path += 'C' + tangents[i - 1][1] + ' ' + tangents[i][0] + ' ' + pts[i];
}
path += 'C' + tangents[pLast][1] + ' ' + tangents[0][0] + ' ' + pts[0] + 'Z';
return path;
};
function makeTangent(prevpt, thispt, nextpt, smoothness) {
var d1x = prevpt[0] - thispt[0],
d1y = prevpt[1] - thispt[1],
d2x = nextpt[0] - thispt[0],
d2y = nextpt[1] - thispt[1],
d1a = Math.pow(d1x * d1x + d1y * d1y, CatmullRomExp / 2),
d2a = Math.pow(d2x * d2x + d2y * d2y, CatmullRomExp / 2),
numx = (d2a * d2a * d1x - d1a * d1a * d2x) * smoothness,
numy = (d2a * d2a * d1y - d1a * d1a * d2y) * smoothness,
denom1 = 3 * d2a * (d1a + d2a),
denom2 = 3 * d1a * (d1a + d2a);
return [
[
d3.round(thispt[0] + (denom1 && numx / denom1), 2),
d3.round(thispt[1] + (denom1 && numy / denom1), 2)
], [
d3.round(thispt[0] - (denom2 && numx / denom2), 2),
d3.round(thispt[1] - (denom2 && numy / denom2), 2)
]
];
}
// step paths - returns a generator function for paths
// with the given step shape
var STEPPATH = {
hv: function(p0, p1) {
return 'H' + d3.round(p1[0], 2) + 'V' + d3.round(p1[1], 2);
},
vh: function(p0, p1) {
return 'V' + d3.round(p1[1], 2) + 'H' + d3.round(p1[0], 2);
},
hvh: function(p0, p1) {
return 'H' + d3.round((p0[0] + p1[0]) / 2, 2) + 'V' +
d3.round(p1[1], 2) + 'H' + d3.round(p1[0], 2);
},
vhv: function(p0, p1) {
return 'V' + d3.round((p0[1] + p1[1]) / 2, 2) + 'H' +
d3.round(p1[0], 2) + 'V' + d3.round(p1[1], 2);
}
};
var STEPLINEAR = function(p0, p1) {
return 'L' + d3.round(p1[0], 2) + ',' + d3.round(p1[1], 2);
};
drawing.steps = function(shape) {
var onestep = STEPPATH[shape] || STEPLINEAR;
return function(pts) {
var path = 'M' + d3.round(pts[0][0], 2) + ',' + d3.round(pts[0][1], 2);
for(var i = 1; i < pts.length; i++) {
path += onestep(pts[i - 1], pts[i]);
}
return path;
};
};
// off-screen svg render testing element, shared by the whole page
// uses the id 'js-plotly-tester' and stores it in drawing.tester
drawing.makeTester = function() {
var tester = Lib.ensureSingleById(d3.select('body'), 'svg', 'js-plotly-tester', function(s) {
s.attr(xmlnsNamespaces.svgAttrs)
.style({
position: 'absolute',
left: '-10000px',
top: '-10000px',
width: '9000px',
height: '9000px',
'z-index': '1'
});
});
// browsers differ on how they describe the bounding rect of
// the svg if its contents spill over... so make a 1x1px
// reference point we can measure off of.
var testref = Lib.ensureSingle(tester, 'path', 'js-reference-point', function(s) {
s.attr('d', 'M0,0H1V1H0Z')
.style({
'stroke-width': 0,
fill: 'black'
});
});
drawing.tester = tester;
drawing.testref = testref;
};
/*
* use our offscreen tester to get a clientRect for an element,
* in a reference frame where it isn't translated (or transformed) and
* its anchor point is at (0,0)
* always returns a copy of the bbox, so the caller can modify it safely
*
* @param {SVGElement} node: the element to measure. If possible this should be
* a <text> or MathJax <g> element that's already passed through
* `convertToTspans` because in that case we can cache the results, but it's
* possible to pass in any svg element.
*
* @param {boolean} inTester: is this element already in `drawing.tester`?
* If you are measuring a dummy element, rather than one you really intend
* to use on the plot, making it in `drawing.tester` in the first place
* allows us to test faster because it cuts out cloning and appending it.
*
* @param {string} hash: for internal use only, if we already know the cache key
* for this element beforehand.
*
* @return {object}: a plain object containing the width, height, left, right,
* top, and bottom of `node`
*/
drawing.savedBBoxes = {};
var savedBBoxesCount = 0;
var maxSavedBBoxes = 10000;
drawing.bBox = function(node, inTester, hash) {
/*
* Cache elements we've already measured so we don't have to
* remeasure the same thing many times
* We have a few bBox callers though who pass a node larger than
* a <text> or a MathJax <g>, such as an axis group containing many labels.
* These will not generate a hash (unless we figure out an appropriate
* hash key for them) and thus we will not hash them.
*/
if(!hash) hash = nodeHash(node);
var out;
if(hash) {
out = drawing.savedBBoxes[hash];
if(out) return Lib.extendFlat({}, out);
}
else if(node.childNodes.length === 1) {
/*
* If we have only one child element, which is itself hashable, make
* a new hash from this element plus its x,y,transform
* These bounding boxes *include* x,y,transform - mostly for use by
* callers trying to avoid overlaps (ie titles)
*/
var innerNode = node.childNodes[0];
hash = nodeHash(innerNode);
if(hash) {
var x = +innerNode.getAttribute('x') || 0;
var y = +innerNode.getAttribute('y') || 0;
var transform = innerNode.getAttribute('transform');
if(!transform) {
// in this case, just varying x and y, don't bother caching
// the final bBox because the alteration is quick.
var innerBB = drawing.bBox(innerNode, false, hash);
if(x) {
innerBB.left += x;
innerBB.right += x;
}
if(y) {
innerBB.top += y;
innerBB.bottom += y;
}
return innerBB;
}
/*
* else we have a transform - rather than make a complicated
* (and error-prone and probably slow) transform parser/calculator,
* just continue on calculating the boundingClientRect of the group
* and use the new composite hash to cache it.
* That said, `innerNode.transform.baseVal` is an array of
* `SVGTransform` objects, that *do* seem to have a nice matrix
* multiplication interface that we could use to avoid making
* another getBoundingClientRect call...
*/
hash += '~' + x + '~' + y + '~' + transform;
out = drawing.savedBBoxes[hash];
if(out) return Lib.extendFlat({}, out);
}
}
var testNode, tester;
if(inTester) {
testNode = node;
}
else {
tester = drawing.tester.node();
// copy the node to test into the tester
testNode = node.cloneNode(true);
tester.appendChild(testNode);
}
// standardize its position (and newline tspans if any)
d3.select(testNode)
.attr('transform', null)
.call(svgTextUtils.positionText, 0, 0);
var testRect = testNode.getBoundingClientRect();
var refRect = drawing.testref
.node()
.getBoundingClientRect();
if(!inTester) tester.removeChild(testNode);
var bb = {
height: testRect.height,
width: testRect.width,
left: testRect.left - refRect.left,
top: testRect.top - refRect.top,
right: testRect.right - refRect.left,
bottom: testRect.bottom - refRect.top
};
// make sure we don't have too many saved boxes,
// or a long session could overload on memory
// by saving boxes for long-gone elements
if(savedBBoxesCount >= maxSavedBBoxes) {
drawing.savedBBoxes = {};
savedBBoxesCount = 0;
}
// cache this bbox
if(hash) drawing.savedBBoxes[hash] = bb;
savedBBoxesCount++;
return Lib.extendFlat({}, bb);
};
// capture everything about a node (at least in our usage) that
// impacts its bounding box, given that bBox clears x, y, and transform
function nodeHash(node) {
var inputText = node.getAttribute('data-unformatted');
if(inputText === null) return;
return inputText +
node.getAttribute('data-math') +
node.getAttribute('text-anchor') +
node.getAttribute('style');
}
/*
* make a robust clipPath url from a local id
* note! We'd better not be exporting from a page
* with a <base> or the svg will not be portable!
*/
drawing.setClipUrl = function(s, localId) {
if(!localId) {
s.attr('clip-path', null);
return;
}
if(drawing.baseUrl === undefined) {
var base = d3.select('base');
// Stash base url once and for all!
// We may have to stash this elsewhere when
// we'll try to support for child windows
// more info -> https://github.com/plotly/plotly.js/issues/702
if(base.size() && base.attr('href')) {
drawing.baseUrl = window.location.href.split('#')[0];
} else {
drawing.baseUrl = '';
}
}
s.attr('clip-path', 'url(' + drawing.baseUrl + '#' + localId + ')');
};
drawing.getTranslate = function(element) {
// Note the separator [^\d] between x and y in this regex
// We generally use ',' but IE will convert it to ' '
var re = /.*\btranslate\((-?\d*\.?\d*)[^-\d]*(-?\d*\.?\d*)[^\d].*/,
getter = element.attr ? 'attr' : 'getAttribute',
transform = element[getter]('transform') || '';
var translate = transform.replace(re, function(match, p1, p2) {
return [p1, p2].join(' ');
})
.split(' ');
return {
x: +translate[0] || 0,
y: +translate[1] || 0
};
};
drawing.setTranslate = function(element, x, y) {
var re = /(\btranslate\(.*?\);?)/,
getter = element.attr ? 'attr' : 'getAttribute',
setter = element.attr ? 'attr' : 'setAttribute',
transform = element[getter]('transform') || '';
x = x || 0;
y = y || 0;
transform = transform.replace(re, '').trim();
transform += ' translate(' + x + ', ' + y + ')';
transform = transform.trim();
element[setter]('transform', transform);
return transform;
};
drawing.getScale = function(element) {
var re = /.*\bscale\((\d*\.?\d*)[^\d]*(\d*\.?\d*)[^\d].*/,
getter = element.attr ? 'attr' : 'getAttribute',
transform = element[getter]('transform') || '';
var translate = transform.replace(re, function(match, p1, p2) {
return [p1, p2].join(' ');
})
.split(' ');
return {
x: +translate[0] || 1,
y: +translate[1] || 1
};
};
drawing.setScale = function(element, x, y) {
var re = /(\bscale\(.*?\);?)/,
getter = element.attr ? 'attr' : 'getAttribute',
setter = element.attr ? 'attr' : 'setAttribute',
transform = element[getter]('transform') || '';
x = x || 1;
y = y || 1;
transform = transform.replace(re, '').trim();
transform += ' scale(' + x + ', ' + y + ')';
transform = transform.trim();
element[setter]('transform', transform);
return transform;