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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
"""Class to generate files in mermaidjs format."""
from __future__ import annotations
from pylint.pyreverse.printer import EdgeType, NodeProperties, NodeType, Printer
from pylint.pyreverse.utils import get_annotation_label
class MermaidJSPrinter(Printer):
"""Printer for MermaidJS diagrams."""
DEFAULT_COLOR = "black"
NODES: dict[NodeType, str] = {
NodeType.CLASS: "class",
NodeType.INTERFACE: "class",
NodeType.PACKAGE: "class",
}
ARROWS: dict[EdgeType, str] = {
EdgeType.INHERITS: "--|>",
EdgeType.IMPLEMENTS: "..|>",
EdgeType.ASSOCIATION: "--*",
EdgeType.AGGREGATION: "--o",
EdgeType.USES: "-->",
}
def _open_graph(self) -> None:
"""Emit the header lines."""
self.emit("classDiagram")
self._inc_indent()
def emit_node(
self,
name: str,
type_: NodeType,
properties: NodeProperties | None = None,
) -> None:
"""Create a new node.
Nodes can be classes, packages, participants etc.
"""
# pylint: disable=duplicate-code
if properties is None:
properties = NodeProperties(label=name)
stereotype = "~~Interface~~" if type_ is NodeType.INTERFACE else ""
nodetype = self.NODES[type_]
body = []
if properties.attrs:
body.extend(properties.attrs)
if properties.methods:
for func in properties.methods:
args = self._get_method_arguments(func)
line = f"{func.name}({', '.join(args)})"
line += "*" if func.is_abstract() else ""
if func.returns:
line += f" {get_annotation_label(func.returns)}"
body.append(line)
name = name.split(".")[-1]
self.emit(f"{nodetype} {name}{stereotype} {{")
self._inc_indent()
for line in body:
self.emit(line)
self._dec_indent()
self.emit("}")
def emit_edge(
self,
from_node: str,
to_node: str,
type_: EdgeType,
label: str | None = None,
) -> None:
"""Create an edge from one node to another to display relationships."""
from_node = from_node.split(".")[-1]
to_node = to_node.split(".")[-1]
edge = f"{from_node} {self.ARROWS[type_]} {to_node}"
if label:
edge += f" : {label}"
self.emit(edge)
def _close_graph(self) -> None:
"""Emit the lines needed to properly close the graph."""
self._dec_indent()
class HTMLMermaidJSPrinter(MermaidJSPrinter):
"""Printer for MermaidJS diagrams wrapped in a html boilerplate."""
HTML_OPEN_BOILERPLATE = """<html>
<body>
<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
<div class="mermaid">
"""
HTML_CLOSE_BOILERPLATE = """
</div>
</body>
</html>
"""
GRAPH_INDENT_LEVEL = 4
def _open_graph(self) -> None:
self.emit(self.HTML_OPEN_BOILERPLATE)
for _ in range(self.GRAPH_INDENT_LEVEL):
self._inc_indent()
super()._open_graph()
def _close_graph(self) -> None:
for _ in range(self.GRAPH_INDENT_LEVEL):
self._dec_indent()
self.emit(self.HTML_CLOSE_BOILERPLATE)