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//
// Copyright (C) 2020 Greg Landrum and T5 Informatics GmbH
//
// @@ 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.
//
//
#ifdef __EMSCRIPTEN__
#include <GraphMol/MolDraw2D/MolDraw2DJS.h>
#include <GraphMol/MolDraw2D/MolDraw2DDetails.h>
#include <GraphMol/SmilesParse/SmilesWrite.h>
#include <Geometry/point.h>
#ifdef RDK_BUILD_FREETYPE_SUPPORT
#include <GraphMol/MolDraw2D/DrawTextFTJS.h>
#endif
#include <GraphMol/MolDraw2D/DrawTextJS.h>
#include <boost/format.hpp>
#include <sstream>
#include <cmath>
namespace RDKit {
std::string DrawColourToSVG(const RDKit::DrawColour &col);
// ****************************************************************************
void MolDraw2DJS::initDrawing() {}
// ****************************************************************************
void MolDraw2DJS::initTextDrawer(bool noFreetype) {
double max_fnt_sz = drawOptions().maxFontSize;
double min_fnt_sz = drawOptions().minFontSize;
if (noFreetype) {
text_drawer_.reset(
new MolDraw2D_detail::DrawTextJS(max_fnt_sz, min_fnt_sz, d_context));
} else {
#ifdef RDK_BUILD_FREETYPE_SUPPORT
try {
text_drawer_.reset(new MolDraw2D_detail::DrawTextFTJS(
max_fnt_sz, min_fnt_sz, drawOptions().fontFile, d_context));
} catch (std::runtime_error &e) {
BOOST_LOG(rdWarningLog)
<< e.what() << std::endl
<< "Falling back to native JS text handling." << std::endl;
text_drawer_.reset(
new MolDraw2D_detail::DrawTextJS(max_fnt_sz, min_fnt_sz, d_context));
}
#else
text_drawer_.reset(
new MolDraw2D_detail::DrawTextJS(max_fnt_sz, min_fnt_sz, d_context));
#endif
}
if (drawOptions().baseFontSize > 0.0) {
text_drawer_->setBaseFontSize(drawOptions().baseFontSize);
}
}
// ****************************************************************************
void MolDraw2DJS::drawLine(const Point2D &cds1, const Point2D &cds2,
bool rawCoords) {
Point2D c1 = rawCoords ? cds1 : getDrawCoords(cds1);
Point2D c2 = rawCoords ? cds2 : getDrawCoords(cds2);
std::string col = DrawColourToSVG(colour());
double width = getDrawLineWidth();
std::string dashString = "";
const DashPattern &dashes = dash();
d_context.call<void>("beginPath");
d_context.set("lineWidth", width);
d_context.set("strokeStyle", col);
if (dashes.size()) {
d_context.call<void>("setLineDash", emscripten::typed_memory_view(
dashes.size(), dashes.data()));
}
d_context.call<void>("moveTo", c1.x, c1.y);
d_context.call<void>("lineTo", c2.x, c2.y);
d_context.call<void>("stroke");
if (dashes.size()) {
static const DashPattern nodash;
d_context.call<void>("setLineDash", emscripten::typed_memory_view(
nodash.size(), nodash.data()));
}
}
// ****************************************************************************
void MolDraw2DJS::drawPolygon(const std::vector<Point2D> &cds, bool rawCoords) {
PRECONDITION(cds.size() >= 3, "must have at least three points");
std::string col = DrawColourToSVG(colour());
double width = getDrawLineWidth();
d_context.call<void>("beginPath");
d_context.set("lineWidth", width);
d_context.set("lineCap", std::string("butt"));
d_context.set("lineJoin", std::string("round"));
d_context.set("strokeStyle", col);
Point2D c0 = rawCoords ? cds[0] : getDrawCoords(cds[0]);
d_context.call<void>("moveTo", c0.x, c0.y);
for (unsigned int i = 1; i < cds.size(); ++i) {
Point2D ci = rawCoords ? cds[i] : getDrawCoords(cds[i]);
d_context.call<void>("lineTo", ci.x, ci.y);
}
if (fillPolys()) {
d_context.call<void>("closePath");
d_context.set("fillStyle", col);
d_context.call<void>("fill");
}
d_context.call<void>("stroke");
}
// ****************************************************************************
void MolDraw2DJS::drawEllipse(const Point2D &cds1, const Point2D &cds2,
bool rawCoords) {
Point2D c1 = rawCoords ? cds1 : getDrawCoords(cds1);
Point2D c2 = rawCoords ? cds2 : getDrawCoords(cds2);
double w = c2.x - c1.x;
double h = c2.y - c1.y;
double cx = c1.x + w / 2;
double cy = c1.y + h / 2;
w = w > 0 ? w : -1 * w;
h = h > 0 ? h : -1 * h;
std::string col = DrawColourToSVG(colour());
double width = getDrawLineWidth();
d_context.call<void>("beginPath");
d_context.set("lineWidth", width);
d_context.set("strokeStyle", col);
d_context.call<void>("ellipse", cx, cy, w / 2, h / 2, 0, 0, 2 * M_PI);
if (fillPolys()) {
d_context.set("fillStyle", col);
d_context.call<void>("fill");
}
d_context.call<void>("stroke");
}
// ****************************************************************************
void MolDraw2DJS::drawWavyLine(const Point2D &cds1, const Point2D &cds2,
const DrawColour &col1, const DrawColour &,
unsigned int nSegments, double vertOffset,
bool rawCoords) {
PRECONDITION(nSegments > 1, "too few segments");
std::string col = DrawColourToSVG(colour());
double width = getDrawLineWidth();
auto segments =
MolDraw2D_detail::getWavyLineSegments(cds1, cds2, nSegments, vertOffset);
d_context.call<void>("beginPath");
d_context.set("lineWidth", width);
d_context.set("strokeStyle", col);
auto c1 = std::get<0>(segments[0]);
c1 = rawCoords ? c1 : getDrawCoords(c1);
d_context.call<void>("moveTo", c1.x, c1.y);
for (const auto &segment : segments) {
auto cpt1 = std::get<1>(segment);
cpt1 = rawCoords ? cpt1 : getDrawCoords(cpt1);
auto cpt2 = std::get<2>(segment);
cpt2 = rawCoords ? cpt2 : getDrawCoords(cpt2);
auto segpt = std::get<3>(segment);
segpt = rawCoords ? segpt : getDrawCoords(segpt);
d_context.call<void>("bezierCurveTo", cpt1.x, cpt1.y, cpt2.x, cpt2.y,
segpt.x, segpt.y);
}
d_context.call<void>("stroke");
}
// ****************************************************************************
void MolDraw2DJS::clearDrawing() {
MolDraw2D::clearDrawing();
std::string col = DrawColourToSVG(drawOptions().backgroundColour);
d_context.call<void>("clearRect", offset().x, offset().y, width(), height());
d_context.set("fillStyle", col);
d_context.call<void>("fillRect", offset().x, offset().y, width(), height());
}
} // namespace RDKit
#endif // __EMSCRIPTEN__
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