038beb6d26
Replace inline Symbol() allocations with the existing _SYM_WIRE/_SYM_PTS/_SYM_XY constants and new _SYM_AT/_SYM_LABEL constants for consistency. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
770 lines
27 KiB
Python
770 lines
27 KiB
Python
"""
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Wire Manager for KiCad Schematics
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Handles wire creation using S-expression manipulation, similar to dynamic symbol loading.
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kicad-skip's wire API doesn't support creating wires with standard parameters, so we
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manipulate the .kicad_sch file directly.
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"""
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import uuid
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import logging
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import math
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import tempfile
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from pathlib import Path
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from typing import List, Tuple, Optional
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import sexpdata
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from sexpdata import Symbol
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logger = logging.getLogger("kicad_interface")
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# Module-level Symbol constants — avoids repeated allocation on every call
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_SYM_WIRE = Symbol("wire")
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_SYM_PTS = Symbol("pts")
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_SYM_XY = Symbol("xy")
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_SYM_AT = Symbol("at")
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_SYM_LABEL = Symbol("label")
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_SYM_STROKE = Symbol("stroke")
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_SYM_WIDTH = Symbol("width")
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_SYM_TYPE = Symbol("type")
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_SYM_UUID = Symbol("uuid")
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_SYM_SHEET_INSTANCES = Symbol("sheet_instances")
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class WireManager:
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"""Manage wires in KiCad schematics using S-expression manipulation"""
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@staticmethod
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def add_wire(
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schematic_path: Path,
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start_point: List[float],
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end_point: List[float],
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stroke_width: float = 0,
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stroke_type: str = "default",
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) -> bool:
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"""
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Add a wire to the schematic using S-expression manipulation
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Args:
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schematic_path: Path to .kicad_sch file
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start_point: [x, y] coordinates for wire start
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end_point: [x, y] coordinates for wire end
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stroke_width: Wire width (default 0 for standard)
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stroke_type: Stroke type (default, solid, dashed, etc.)
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Returns:
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True if successful, False otherwise
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"""
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try:
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# Read schematic
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with open(schematic_path, "r", encoding="utf-8") as f:
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sch_content = f.read()
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sch_data = sexpdata.loads(sch_content)
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# Break any existing wire that passes through a new endpoint (T-junction support)
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for pt in (start_point, end_point):
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splits = WireManager._break_wires_at_point(sch_data, pt)
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if splits:
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logger.info(f"Broke {splits} wire(s) at new wire endpoint {pt}")
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# Create wire S-expression
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# Format: (wire (pts (xy x1 y1) (xy x2 y2)) (stroke (width N) (type default)) (uuid ...))
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wire_sexp = WireManager._make_wire_sexp(
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start_point, end_point, stroke_width, stroke_type
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)
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# Find insertion point (before sheet_instances)
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sheet_instances_index = None
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for i, item in enumerate(sch_data):
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if (
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isinstance(item, list)
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and len(item) > 0
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and item[0] == _SYM_SHEET_INSTANCES
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):
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sheet_instances_index = i
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break
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if sheet_instances_index is None:
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logger.error("No sheet_instances section found in schematic")
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return False
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# Insert wire before sheet_instances
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sch_data.insert(sheet_instances_index, wire_sexp)
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logger.info(f"Injected wire from {start_point} to {end_point}")
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# Write back
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with open(schematic_path, "w", encoding="utf-8") as f:
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output = sexpdata.dumps(sch_data)
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f.write(output)
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logger.info(f"Successfully added wire to {schematic_path.name}")
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return True
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except Exception as e:
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logger.error(f"Error adding wire: {e}")
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import traceback
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logger.error(traceback.format_exc())
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return False
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@staticmethod
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def add_polyline_wire(
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schematic_path: Path,
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points: List[List[float]],
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stroke_width: float = 0,
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stroke_type: str = "default",
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) -> bool:
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"""
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Add a multi-segment wire (polyline) to the schematic
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Args:
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schematic_path: Path to .kicad_sch file
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points: List of [x, y] coordinates for each point in the path
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stroke_width: Wire width
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stroke_type: Stroke type
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Returns:
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True if successful, False otherwise
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"""
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try:
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if len(points) < 2:
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logger.error("Polyline requires at least 2 points")
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return False
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# Read schematic
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with open(schematic_path, "r", encoding="utf-8") as f:
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sch_content = f.read()
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sch_data = sexpdata.loads(sch_content)
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# Break any existing wire at the outer endpoints of the new path
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for pt in (points[0], points[-1]):
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splits = WireManager._break_wires_at_point(sch_data, pt)
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if splits:
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logger.info(f"Broke {splits} wire(s) at new polyline endpoint {pt}")
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# KiCAD wire elements only support exactly 2 pts each.
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# Split N waypoints into N-1 individual wire segments.
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wire_sexps = [
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WireManager._make_wire_sexp(
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points[i], points[i + 1], stroke_width, stroke_type
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)
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for i in range(len(points) - 1)
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]
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# Find insertion point
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sheet_instances_index = None
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for i, item in enumerate(sch_data):
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if (
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isinstance(item, list)
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and len(item) > 0
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and item[0] == _SYM_SHEET_INSTANCES
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):
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sheet_instances_index = i
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break
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if sheet_instances_index is None:
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logger.error("No sheet_instances section found in schematic")
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return False
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# Insert all segments (in reverse so order is preserved after inserts)
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for wire_sexp in reversed(wire_sexps):
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sch_data.insert(sheet_instances_index, wire_sexp)
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logger.info(
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f"Injected {len(wire_sexps)} wire segments for {len(points)}-point polyline"
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)
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# Write back
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with open(schematic_path, "w", encoding="utf-8") as f:
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output = sexpdata.dumps(sch_data)
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f.write(output)
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logger.info(f"Successfully added polyline wire to {schematic_path.name}")
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return True
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except Exception as e:
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logger.error(f"Error adding polyline wire: {e}")
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import traceback
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logger.error(traceback.format_exc())
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return False
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@staticmethod
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def add_label(
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schematic_path: Path,
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text: str,
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position: List[float],
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label_type: str = "label",
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orientation: int = 0,
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) -> bool:
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"""
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Add a net label to the schematic
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Args:
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schematic_path: Path to .kicad_sch file
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text: Label text (net name)
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position: [x, y] coordinates for label
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label_type: Type of label ('label', 'global_label', 'hierarchical_label')
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orientation: Rotation angle (0, 90, 180, 270)
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Returns:
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True if successful, False otherwise
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"""
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try:
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# Read schematic
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with open(schematic_path, "r", encoding="utf-8") as f:
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sch_content = f.read()
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sch_data = sexpdata.loads(sch_content)
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# Create label S-expression
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# Format: (label "TEXT" (at x y angle) (effects (font (size 1.27 1.27))))
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label_sexp = [
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Symbol(label_type),
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text,
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[Symbol("at"), position[0], position[1], orientation],
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[Symbol("fields_autoplaced"), Symbol("yes")],
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[
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Symbol("effects"),
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[Symbol("font"), [Symbol("size"), 1.27, 1.27]],
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[Symbol("justify"), Symbol("left"), Symbol("bottom")],
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],
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[Symbol("uuid"), str(uuid.uuid4())],
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]
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# Find insertion point
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sheet_instances_index = None
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for i, item in enumerate(sch_data):
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if (
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isinstance(item, list)
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and len(item) > 0
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and item[0] == _SYM_SHEET_INSTANCES
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):
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sheet_instances_index = i
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break
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if sheet_instances_index is None:
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logger.error("No sheet_instances section found in schematic")
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return False
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# Insert label
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sch_data.insert(sheet_instances_index, label_sexp)
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logger.info(f"Injected label '{text}' at {position}")
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# Write back
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with open(schematic_path, "w", encoding="utf-8") as f:
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output = sexpdata.dumps(sch_data)
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f.write(output)
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logger.info(f"Successfully added label to {schematic_path.name}")
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return True
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except Exception as e:
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logger.error(f"Error adding label: {e}")
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import traceback
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logger.error(traceback.format_exc())
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return False
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@staticmethod
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def _parse_wire(
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wire_item,
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) -> Optional[Tuple[Tuple[float, float], Tuple[float, float], float, str]]:
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"""
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Parse a wire S-expression item in a single pass.
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Returns ((x1,y1), (x2,y2), stroke_width, stroke_type), or None if not a valid wire.
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"""
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if not (
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isinstance(wire_item, list)
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and len(wire_item) >= 2
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and wire_item[0] == _SYM_WIRE
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):
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return None
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start = end = None
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stroke_width: float = 0
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stroke_type: str = "default"
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for part in wire_item[1:]:
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if not isinstance(part, list) or not part:
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continue
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tag = part[0]
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if tag == _SYM_PTS:
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found: List[Tuple[float, float]] = []
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for p in part[1:]:
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if isinstance(p, list) and len(p) >= 3 and p[0] == _SYM_XY:
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found.append((float(p[1]), float(p[2])))
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if len(found) == 2:
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break
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if len(found) == 2:
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start, end = found[0], found[1]
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elif tag == _SYM_STROKE:
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for sp in part[1:]:
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if isinstance(sp, list) and len(sp) >= 2:
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if sp[0] == _SYM_WIDTH:
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stroke_width = sp[1]
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elif sp[0] == _SYM_TYPE:
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stroke_type = str(sp[1])
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if start is not None and end is not None:
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return start, end, stroke_width, stroke_type
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return None
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@staticmethod
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def _point_strictly_on_wire(
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px: float,
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py: float,
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x1: float,
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y1: float,
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x2: float,
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y2: float,
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eps: float = 1e-6,
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) -> bool:
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"""
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Return True if (px, py) lies strictly between (x1,y1) and (x2,y2)
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on a horizontal or vertical wire segment (not at either endpoint).
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"""
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if abs(y1 - y2) < eps: # horizontal wire
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if abs(py - y1) > eps:
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return False
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lo, hi = min(x1, x2), max(x1, x2)
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return lo + eps < px < hi - eps
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if abs(x1 - x2) < eps: # vertical wire
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if abs(px - x1) > eps:
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return False
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lo, hi = min(y1, y2), max(y1, y2)
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return lo + eps < py < hi - eps
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return False
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@staticmethod
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def _make_wire_sexp(
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start: List[float],
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end: List[float],
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stroke_width: float = 0,
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stroke_type: str = "default",
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) -> list:
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return [
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_SYM_WIRE,
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[_SYM_PTS, [_SYM_XY, start[0], start[1]], [_SYM_XY, end[0], end[1]]],
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[_SYM_STROKE, [_SYM_WIDTH, stroke_width], [_SYM_TYPE, Symbol(stroke_type)]],
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[_SYM_UUID, str(uuid.uuid4())],
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]
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@staticmethod
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def _break_wires_at_point(sch_data: list, position: List[float]) -> int:
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"""
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Split any wire segment that passes through *position* as a strict
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midpoint (i.e. position is not an existing endpoint). Mirrors
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KiCAD's SCH_LINE_WIRE_BUS_TOOL::BreakSegments behaviour.
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Returns the number of wires split.
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"""
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px, py = float(position[0]), float(position[1])
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splits = 0
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i = 0
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while i < len(sch_data):
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parsed = WireManager._parse_wire(sch_data[i])
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if parsed is not None:
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(x1, y1), (x2, y2), stroke_width, stroke_type = parsed
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if WireManager._point_strictly_on_wire(px, py, x1, y1, x2, y2):
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seg_a = WireManager._make_wire_sexp(
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[x1, y1], [px, py], stroke_width, stroke_type
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)
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seg_b = WireManager._make_wire_sexp(
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[px, py], [x2, y2], stroke_width, stroke_type
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)
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sch_data[i : i + 1] = [seg_a, seg_b]
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logger.info(f"Split wire ({x1},{y1})->({x2},{y2}) at ({px},{py})")
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splits += 1
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i += 2 # skip the two new segments
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continue
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i += 1
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return splits
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@staticmethod
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def add_junction(
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schematic_path: Path, position: List[float], diameter: float = 0
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) -> bool:
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"""
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Add a junction (connection dot) to the schematic.
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Mirrors KiCAD's AddJunction behaviour: any wire whose interior passes
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through *position* is split into two segments at that point so that
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the BFS-based get_wire_connections tool can traverse the T/X branch.
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Args:
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schematic_path: Path to .kicad_sch file
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position: [x, y] coordinates for junction
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diameter: Junction diameter (0 for default)
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Returns:
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True if successful, False otherwise
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"""
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try:
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# Read schematic
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with open(schematic_path, "r", encoding="utf-8") as f:
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sch_content = f.read()
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sch_data = sexpdata.loads(sch_content)
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# Split any wire that passes through the junction as a midpoint
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# (mirrors KiCAD's AddJunction / BreakSegments behaviour)
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splits = WireManager._break_wires_at_point(sch_data, position)
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if splits:
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logger.info(f"Broke {splits} wire(s) at junction position {position}")
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# Create junction S-expression
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# Format: (junction (at x y) (diameter 0) (color 0 0 0 0) (uuid ...))
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junction_sexp = [
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Symbol("junction"),
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[Symbol("at"), position[0], position[1]],
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[Symbol("diameter"), diameter],
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[Symbol("color"), 0, 0, 0, 0],
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[Symbol("uuid"), str(uuid.uuid4())],
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]
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# Find insertion point
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sheet_instances_index = None
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for i, item in enumerate(sch_data):
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if (
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isinstance(item, list)
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and len(item) > 0
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and item[0] == _SYM_SHEET_INSTANCES
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):
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sheet_instances_index = i
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break
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if sheet_instances_index is None:
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logger.error("No sheet_instances section found in schematic")
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return False
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# Insert junction
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sch_data.insert(sheet_instances_index, junction_sexp)
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logger.info(f"Injected junction at {position}")
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# Write back
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with open(schematic_path, "w", encoding="utf-8") as f:
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output = sexpdata.dumps(sch_data)
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f.write(output)
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logger.info(f"Successfully added junction to {schematic_path.name}")
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return True
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except Exception as e:
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logger.error(f"Error adding junction: {e}")
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import traceback
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logger.error(traceback.format_exc())
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return False
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@staticmethod
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def add_no_connect(schematic_path: Path, position: List[float]) -> bool:
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"""
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Add a no-connect flag to the schematic
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Args:
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schematic_path: Path to .kicad_sch file
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position: [x, y] coordinates for no-connect flag
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Returns:
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True if successful, False otherwise
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"""
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try:
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# Read schematic
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with open(schematic_path, "r", encoding="utf-8") as f:
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sch_content = f.read()
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sch_data = sexpdata.loads(sch_content)
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# Create no_connect S-expression
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# Format: (no_connect (at x y) (uuid ...))
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no_connect_sexp = [
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Symbol("no_connect"),
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[Symbol("at"), position[0], position[1]],
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[Symbol("uuid"), str(uuid.uuid4())],
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]
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# Find insertion point
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sheet_instances_index = None
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for i, item in enumerate(sch_data):
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if (
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isinstance(item, list)
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and len(item) > 0
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and item[0] == _SYM_SHEET_INSTANCES
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):
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sheet_instances_index = i
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break
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if sheet_instances_index is None:
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logger.error("No sheet_instances section found in schematic")
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return False
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# Insert no_connect
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sch_data.insert(sheet_instances_index, no_connect_sexp)
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logger.info(f"Injected no-connect at {position}")
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# Write back
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with open(schematic_path, "w", encoding="utf-8") as f:
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output = sexpdata.dumps(sch_data)
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f.write(output)
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logger.info(f"Successfully added no-connect to {schematic_path.name}")
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return True
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except Exception as e:
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logger.error(f"Error adding no-connect: {e}")
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import traceback
|
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logger.error(traceback.format_exc())
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return False
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@staticmethod
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def delete_wire(
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schematic_path: Path,
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start_point: List[float],
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end_point: List[float],
|
|
tolerance: float = 0.5,
|
|
) -> bool:
|
|
"""
|
|
Delete a wire from the schematic matching given start/end coordinates.
|
|
|
|
Args:
|
|
schematic_path: Path to .kicad_sch file
|
|
start_point: [x, y] coordinates for wire start
|
|
end_point: [x, y] coordinates for wire end
|
|
tolerance: Maximum coordinate difference to consider a match (mm)
|
|
|
|
Returns:
|
|
True if a wire was found and removed, False otherwise
|
|
"""
|
|
try:
|
|
with open(schematic_path, "r", encoding="utf-8") as f:
|
|
sch_content = f.read()
|
|
|
|
sch_data = sexpdata.loads(sch_content)
|
|
|
|
sx, sy = start_point
|
|
ex, ey = end_point
|
|
|
|
for i, item in enumerate(sch_data):
|
|
if not (
|
|
isinstance(item, list) and len(item) > 0 and item[0] == _SYM_WIRE
|
|
):
|
|
continue
|
|
|
|
# Extract pts from the wire s-expression
|
|
pts_list = None
|
|
for part in item[1:]:
|
|
if isinstance(part, list) and len(part) > 0 and part[0] == _SYM_PTS:
|
|
pts_list = part
|
|
break
|
|
|
|
if pts_list is None:
|
|
continue
|
|
|
|
xy_points = [
|
|
p
|
|
for p in pts_list[1:]
|
|
if isinstance(p, list) and len(p) >= 3 and p[0] == _SYM_XY
|
|
]
|
|
if len(xy_points) < 2:
|
|
continue
|
|
|
|
x1, y1 = float(xy_points[0][1]), float(xy_points[0][2])
|
|
x2, y2 = float(xy_points[-1][1]), float(xy_points[-1][2])
|
|
|
|
match_fwd = (
|
|
abs(x1 - sx) < tolerance
|
|
and abs(y1 - sy) < tolerance
|
|
and abs(x2 - ex) < tolerance
|
|
and abs(y2 - ey) < tolerance
|
|
)
|
|
match_rev = (
|
|
abs(x1 - ex) < tolerance
|
|
and abs(y1 - ey) < tolerance
|
|
and abs(x2 - sx) < tolerance
|
|
and abs(y2 - sy) < tolerance
|
|
)
|
|
|
|
if match_fwd or match_rev:
|
|
del sch_data[i]
|
|
with open(schematic_path, "w", encoding="utf-8") as f:
|
|
f.write(sexpdata.dumps(sch_data))
|
|
logger.info(f"Deleted wire from {start_point} to {end_point}")
|
|
return True
|
|
|
|
logger.warning(f"No matching wire found for {start_point} to {end_point}")
|
|
return False
|
|
|
|
except Exception as e:
|
|
logger.error(f"Error deleting wire: {e}")
|
|
import traceback
|
|
|
|
logger.error(traceback.format_exc())
|
|
return False
|
|
|
|
@staticmethod
|
|
def delete_label(
|
|
schematic_path: Path,
|
|
net_name: str,
|
|
position: Optional[List[float]] = None,
|
|
tolerance: float = 0.5,
|
|
) -> bool:
|
|
"""
|
|
Delete a net label from the schematic by name (and optionally position).
|
|
|
|
Args:
|
|
schematic_path: Path to .kicad_sch file
|
|
net_name: Net label text to match
|
|
position: Optional [x, y] to disambiguate when multiple labels share a name
|
|
tolerance: Maximum coordinate difference to consider a match (mm)
|
|
|
|
Returns:
|
|
True if a label was found and removed, False otherwise
|
|
"""
|
|
try:
|
|
with open(schematic_path, "r", encoding="utf-8") as f:
|
|
sch_content = f.read()
|
|
|
|
sch_data = sexpdata.loads(sch_content)
|
|
|
|
for i, item in enumerate(sch_data):
|
|
if not (
|
|
isinstance(item, list) and len(item) > 0 and item[0] == _SYM_LABEL
|
|
):
|
|
continue
|
|
|
|
# Second element is the label text
|
|
if len(item) < 2 or item[1] != net_name:
|
|
continue
|
|
|
|
if position is not None:
|
|
# Find (at x y ...) sub-expression and check coordinates
|
|
at_entry = next(
|
|
(
|
|
p
|
|
for p in item[1:]
|
|
if isinstance(p, list) and len(p) >= 3 and p[0] == _SYM_AT
|
|
),
|
|
None,
|
|
)
|
|
if at_entry is None:
|
|
continue
|
|
lx, ly = float(at_entry[1]), float(at_entry[2])
|
|
if not (
|
|
abs(lx - position[0]) < tolerance
|
|
and abs(ly - position[1]) < tolerance
|
|
):
|
|
continue
|
|
|
|
del sch_data[i]
|
|
with open(schematic_path, "w", encoding="utf-8") as f:
|
|
f.write(sexpdata.dumps(sch_data))
|
|
logger.info(f"Deleted label '{net_name}'")
|
|
return True
|
|
|
|
logger.warning(f"No matching label found for '{net_name}'")
|
|
return False
|
|
|
|
except Exception as e:
|
|
logger.error(f"Error deleting label: {e}")
|
|
import traceback
|
|
|
|
logger.error(traceback.format_exc())
|
|
return False
|
|
|
|
@staticmethod
|
|
def create_orthogonal_path(
|
|
start: List[float], end: List[float], prefer_horizontal_first: bool = True
|
|
) -> List[List[float]]:
|
|
"""
|
|
Create an orthogonal (right-angle) path between two points
|
|
|
|
Args:
|
|
start: [x, y] start coordinates
|
|
end: [x, y] end coordinates
|
|
prefer_horizontal_first: If True, route horizontally first, else vertically first
|
|
|
|
Returns:
|
|
List of points defining the path: [start, corner, end]
|
|
"""
|
|
x1, y1 = start
|
|
x2, y2 = end
|
|
|
|
if prefer_horizontal_first:
|
|
# Route: start → (x2, y1) → end
|
|
corner = [x2, y1]
|
|
else:
|
|
# Route: start → (x1, y2) → end
|
|
corner = [x1, y2]
|
|
|
|
# If start and end are already aligned, return direct path
|
|
if x1 == x2 or y1 == y2:
|
|
return [start, end]
|
|
|
|
return [start, corner, end]
|
|
|
|
|
|
if __name__ == "__main__":
|
|
# Test wire creation
|
|
import sys
|
|
|
|
sys.path.insert(0, "/home/chris/MCP/KiCAD-MCP-Server/python")
|
|
|
|
from pathlib import Path
|
|
import shutil
|
|
|
|
print("=" * 80)
|
|
print("WIRE MANAGER TEST")
|
|
print("=" * 80)
|
|
|
|
# Create test schematic (cross-platform temp directory)
|
|
test_path = Path(tempfile.gettempdir()) / "test_wire_manager.kicad_sch"
|
|
template_path = Path(
|
|
"/home/chris/MCP/KiCAD-MCP-Server/python/templates/empty.kicad_sch"
|
|
)
|
|
|
|
shutil.copy(template_path, test_path)
|
|
print(f"\n✓ Created test schematic: {test_path}")
|
|
|
|
# Test 1: Add simple wire
|
|
print("\n[1/5] Testing simple wire creation...")
|
|
success = WireManager.add_wire(test_path, [50.8, 50.8], [101.6, 50.8])
|
|
print(f" {'✓' if success else '✗'} Simple wire: {success}")
|
|
|
|
# Test 2: Add orthogonal wire
|
|
print("\n[2/5] Testing orthogonal wire...")
|
|
path = WireManager.create_orthogonal_path([50.8, 60.96], [101.6, 88.9])
|
|
print(f" Orthogonal path: {path}")
|
|
success = WireManager.add_polyline_wire(test_path, path)
|
|
print(f" {'✓' if success else '✗'} Polyline wire: {success}")
|
|
|
|
# Test 3: Add label
|
|
print("\n[3/5] Testing label creation...")
|
|
success = WireManager.add_label(test_path, "VCC", [76.2, 50.8])
|
|
print(f" {'✓' if success else '✗'} Label: {success}")
|
|
|
|
# Test 4: Add junction
|
|
print("\n[4/5] Testing junction creation...")
|
|
success = WireManager.add_junction(test_path, [76.2, 50.8])
|
|
print(f" {'✓' if success else '✗'} Junction: {success}")
|
|
|
|
# Test 5: Add no-connect
|
|
print("\n[5/5] Testing no-connect creation...")
|
|
success = WireManager.add_no_connect(test_path, [127, 50.8])
|
|
print(f" {'✓' if success else '✗'} No-connect: {success}")
|
|
|
|
# Verify with kicad-skip
|
|
print("\n[Verification] Loading with kicad-skip...")
|
|
try:
|
|
from skip import Schematic
|
|
|
|
sch = Schematic(str(test_path))
|
|
wire_count = len(list(sch.wire)) if hasattr(sch, "wire") else 0
|
|
print(f" ✓ Loaded successfully")
|
|
print(f" ✓ Wire count: {wire_count}")
|
|
except Exception as e:
|
|
print(f" ✗ Failed: {e}")
|
|
|
|
print("\n" + "=" * 80)
|
|
print(f"Test schematic saved: {test_path}")
|
|
print("Open in KiCad to verify visual appearance!")
|
|
print("=" * 80)
|