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
|
//
// Copyright (C) 2020-2022 Greg Landrum and other RDKit contributors
//
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
// Original author: Greg Landrum
// A concrete class derived from DrawText that uses the JS Canvas
// to draw text onto a picture.
#ifdef __EMSCRIPTEN__
#include <sstream>
#include <boost/algorithm/string.hpp>
#include <GraphMol/MolDraw2D/DrawTextJS.h>
#include <GraphMol/MolDraw2D/MolDraw2DJS.h>
#include <GraphMol/MolDraw2D/MolDraw2DDetails.h>
#include <boost/format.hpp>
namespace RDKit {
std::string DrawColourToSVG(const RDKit::DrawColour &col);
namespace MolDraw2D_detail {
// ****************************************************************************
DrawTextJS::DrawTextJS(double max_fnt_sz, double min_fnt_sz,
emscripten::val &context)
: DrawTextNotFT(max_fnt_sz, min_fnt_sz), context_(context) {}
// ****************************************************************************
// draw the char, with the bottom left hand corner at cds
void DrawTextJS::drawChar(char c, const Point2D &cds) {
std::string txt(1, c);
std::string font = (boost::format("%fpx sans-serif") % fontSize()).str();
std::string col = DrawColourToSVG(colour());
context_.set("font", font);
context_.set("fillStyle", col);
context_.call<void>("fillText", txt, cds.x, cds.y);
}
// ****************************************************************************
void DrawTextJS::getStringRects(const std::string &text,
std::vector<std::shared_ptr<StringRect>> &rects,
std::vector<TextDrawType> &draw_modes,
std::vector<char> &draw_chars) const {
double running_x = 0.0;
double act_font_size = fontSize();
double char_height;
double max_width = 0.0;
TextDrawType draw_mode = TextDrawType::TextDrawNormal;
for (size_t i = 0; i < text.length(); ++i) {
// setStringDrawMode moves i along to the end of any <sub> or <sup>
// markup
if ('<' == text[i] && setStringDrawMode(text, draw_mode, i)) {
continue;
}
draw_modes.push_back(draw_mode);
draw_chars.push_back(text[i]);
max_width = std::max(
max_width,
static_cast<double>(MolDraw2D_detail::char_widths[(int)text[i]]));
}
for (size_t i = 0; i < draw_chars.size(); ++i) {
double char_width =
0.6 * act_font_size *
static_cast<double>(MolDraw2D_detail::char_widths[(int)draw_chars[i]]) /
max_width;
// Absent a proper set of font metrics (we don't know what font we'll be
// using, for starters) this is something of an empirical bodge.
if (draw_chars[i] == '+') {
char_height = 0.6 * act_font_size;
} else if (draw_chars[i] == '-') {
char_height = 0.4 * act_font_size;
} else {
char_height = 0.8 * act_font_size;
}
double cscale = selectScaleFactor(draw_chars[i], draw_modes[i]);
char_height *= cscale;
char_width *= cscale;
Point2D offset(char_width / 2, char_height / 2);
if (draw_chars[i] == '+' || draw_chars[i] == '-') {
offset.y /= 2.0;
}
Point2D g_centre(char_width / 2, char_height / 2);
rects.push_back(std::shared_ptr<StringRect>(
new StringRect(offset, g_centre, char_width, char_height)));
rects.back()->trans_.x += running_x;
// empirical spacing.
if (draw_modes[i] != TextDrawType::TextDrawNormal) {
running_x += char_width * 1.05;
} else {
running_x += char_width * 1.15;
}
}
for (auto r : rects) {
r->g_centre_.y = act_font_size - r->g_centre_.y;
r->offset_.y = act_font_size / 2.0;
}
adjustStringRectsForSuperSubScript(draw_modes, rects);
}
} // namespace MolDraw2D_detail
} // namespace RDKit
#endif // __EMSCRIPTEN__
|
