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#include <cassert>
#include <string>
#include <unordered_set>
#include "graphviz_edge.h"
#include "graphviz_node.h"
#include "svg_element.h"
GraphvizEdge::GraphvizEdge(SVG::SVGElement &svg_g_element)
: m_edgeop(svg_g_element.graphviz_id), m_svg_g_element(svg_g_element) {}
void GraphvizEdge::add_bbox() { m_svg_g_element.add_bbox(); }
void GraphvizEdge::add_outline_bbox() { m_svg_g_element.add_outline_bbox(); }
void GraphvizEdge::add_outline_overlap_bbox(const GraphvizNode &node,
const double tolerance) {
m_svg_g_element.add_outline_overlap_bbox(node.svg_g_element(), tolerance);
}
static const std::unordered_set<std::string_view>
path_based_primitive_arrow_shapes = {
"curve", //
"icurve", //
};
static const std::unordered_set<std::string_view>
polygon_based_primitive_arrow_shapes = {
"box", //
"crow", //
"diamond", //
"inv", //
"normal", //
"tee", //
"vee", //
};
static const std::unordered_set<std::string_view>
ellipse_based_primitive_arrow_shapes = {
"dot", //
};
static const std::unordered_set<std::string_view>
primitive_arrow_shapes_containing_polyline = {
"box", //
"curve", //
"icurve", //
"tee", //
};
static SVG::SVGElementType
edge_arrowhead_main_svg_element_type(std::string_view primitive_arrow_shape) {
if (polygon_based_primitive_arrow_shapes.contains(primitive_arrow_shape)) {
return SVG::SVGElementType::Polygon;
} else if (ellipse_based_primitive_arrow_shapes.contains(
primitive_arrow_shape)) {
return SVG::SVGElementType::Ellipse;
} else if (path_based_primitive_arrow_shapes.contains(
primitive_arrow_shape)) {
return SVG::SVGElementType::Path;
} else {
assert(false && "unsupported primitive arrow shape");
}
}
SVG::SVGRect GraphvizEdge::arrowhead_outline_bbox(
std::string_view dir, std::string_view primitive_arrow_shape) const {
assert((dir == "forward" || dir == "both") &&
"no arrowhead for this edge direction");
const auto index = dir == "forward" ? 0 : 1;
const auto main_svg_element_type =
edge_arrowhead_main_svg_element_type(primitive_arrow_shape);
const auto main_index =
index + (main_svg_element_type == SVG::SVGElementType::Path ? 1 : 0);
auto edge_arrowhead =
m_svg_g_element.find_child(main_svg_element_type, main_index);
auto edge_arrowhead_bbox = edge_arrowhead.outline_bbox();
if (primitive_arrow_shapes_containing_polyline.contains(
primitive_arrow_shape)) {
auto edge_arrowhead_stem =
m_svg_g_element.find_child(SVG::SVGElementType::Polyline, index);
auto edge_arrowhead_stem_bbox = edge_arrowhead_stem.outline_bbox();
edge_arrowhead_bbox.extend(edge_arrowhead_stem_bbox);
}
return edge_arrowhead_bbox;
}
SVG::SVGRect GraphvizEdge::arrowtail_outline_bbox(
std::string_view dir, std::string_view primitive_arrow_shape) const {
assert((dir == "back" || dir == "both") &&
"no arrowhead for this edge direction");
const auto index = 0;
const auto main_svg_element_type =
edge_arrowhead_main_svg_element_type(primitive_arrow_shape);
const auto main_index =
index + (main_svg_element_type == SVG::SVGElementType::Path ? 1 : 0);
auto edge_arrowtail =
m_svg_g_element.find_child(main_svg_element_type, main_index);
auto edge_arrowtail_bbox = edge_arrowtail.outline_bbox();
if (primitive_arrow_shapes_containing_polyline.contains(
primitive_arrow_shape)) {
auto edge_arrowtail_stem =
m_svg_g_element.find_child(SVG::SVGElementType::Polyline, index);
auto edge_arrowtail_stem_bbox = edge_arrowtail_stem.outline_bbox();
edge_arrowtail_bbox.extend(edge_arrowtail_stem_bbox);
}
return edge_arrowtail_bbox;
}
std::string_view GraphvizEdge::edgeop() const { return m_edgeop; }
std::string GraphvizEdge::fillcolor() const {
const auto fill = m_svg_g_element.attribute_from_subtree<std::string>(
&SVG::SVGAttributes::fill, &SVG::SVGElement::is_closed_shape_element, "");
const auto fill_opacity = m_svg_g_element.attribute_from_subtree<double>(
&SVG::SVGAttributes::fill_opacity,
&SVG::SVGElement::is_closed_shape_element, 1);
if (fill.empty() && fill_opacity == 1) {
return "";
}
return SVG::to_dot_color(fill, fill_opacity);
}
SVG::SVGElement &GraphvizEdge::stem() const {
return m_svg_g_element.find_child(SVG::SVGElementType::Path);
}
const SVG::SVGElement &GraphvizEdge::svg_g_element() const {
return m_svg_g_element;
}
SVG::SVGRect GraphvizEdge::bbox() const { return m_svg_g_element.bbox(); }
SVG::SVGPoint GraphvizEdge::center() const { return bbox().center(); }
std::string GraphvizEdge::color() const {
const auto stroke = m_svg_g_element.attribute_from_subtree<std::string>(
&SVG::SVGAttributes::stroke, &SVG::SVGElement::is_shape_element, "");
const auto stroke_opacity = m_svg_g_element.attribute_from_subtree<double>(
&SVG::SVGAttributes::stroke_opacity, &SVG::SVGElement::is_shape_element,
1);
return SVG::to_dot_color(stroke, stroke_opacity);
}
double GraphvizEdge::penwidth() const {
return m_svg_g_element.attribute_from_subtree<double>(
&SVG::SVGAttributes::stroke_width, &SVG::SVGElement::is_shape_element, 1);
}
SVG::SVGRect GraphvizEdge::outline_bbox() const {
return m_svg_g_element.outline_bbox();
}
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