88 行
3.8 KiB
Python
88 行
3.8 KiB
Python
#!/usr/bin/env python3
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"""EasyEDA .esym 符号源码解析。
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格式：每行一个 JSON 数组。实测出来的字段布局（2026-09-07，PhoneRail 工程 131 个符号）：
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["PART", name, {"BBOX":[x1,y1,x2,y2]}]
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["PIN", id, ?, ?, x, y, length, rotation, color, ?, ?]
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x,y 是**连接点**（外端），rotation 是「从连接点指向本体」的方向：0=向右(引脚在左边)
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["ATTR", id, parentId, key, value, ?, visible, x, y, rot, fontStyle, ?]
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挂在 PIN 上的 key 有 NAME / NUMBER / Pin Type
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["RECT", id, x1, y1, x2, y2, rx, ry, rot, style, ?]
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["POLY", id, [x1,y1,x2,y2,...], closed, style, ?]
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["CIRCLE", id, cx, cy, r, style, ?]
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["ELLIPSE", id, cx, cy, rx, ry, rot, style, ?]
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["ARC", id, sx, sy, mx, my, ex, ey, style, ?] ← 实测 (mx,my) 是弧中点，和 KiCad 三点式同构
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["TEXT", id, x, y, rot, text, style]
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坐标单位 0.01 inch，**Y 轴向上**（和 KiCad .kicad_sym 同向，符号图形不需要翻 Y）。
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"""
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import json
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MM = 0.254 # 1 EasyEDA 单位 = 0.01 inch = 0.254 mm
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PIN_TYPE = { # EasyEDA "Pin Type" -> KiCad 电气类型
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"Undefined": "unspecified",
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"IN": "input",
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"OUT": "output",
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"BI": "bidirectional",
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"POWER": "power_in",
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}
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def parse(path):
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"""-> {'name':str, 'bbox':[x1,y1,x2,y2], 'pins':[...], 'shapes':[...], 'texts':[...]}"""
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rows = []
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for line in open(path, encoding="utf-8"):
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line = line.strip()
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if line:
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rows.append(json.loads(line))
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sym = {"name": None, "bbox": None, "pins": [], "shapes": [], "texts": [], "skipped": []}
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pins = {} # pin id -> dict
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for r in rows:
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t = r[0]
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if t == "PART":
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sym["name"] = r[1]
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if len(r) > 2 and isinstance(r[2], dict):
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sym["bbox"] = r[2].get("BBOX")
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elif t == "PIN":
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p = {"id": r[1], "x": r[4], "y": r[5], "len": r[6], "rot": r[7],
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"number": None, "name": None, "type": "Undefined",
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"nameVisible": True, "numberVisible": True}
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pins[r[1]] = p
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sym["pins"].append(p)
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elif t == "ATTR":
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p = pins.get(r[2])
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if not p:
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continue
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key, val, vis = r[3], r[4], (r[6] if len(r) > 6 else 1)
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if key == "NAME":
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p["name"] = val; p["nameVisible"] = bool(vis)
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elif key == "NUMBER":
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p["number"] = val; p["numberVisible"] = bool(vis)
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elif key == "Pin Type":
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p["type"] = val or "Undefined"
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elif t == "RECT":
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sym["shapes"].append({"k": "rect", "x1": r[2], "y1": r[3], "x2": r[4], "y2": r[5]})
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elif t == "POLY":
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pts = r[2]
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sym["shapes"].append({"k": "poly", "pts": [(pts[i], pts[i + 1]) for i in range(0, len(pts) - 1, 2)],
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"closed": bool(r[3]) if len(r) > 3 else False})
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elif t == "CIRCLE":
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sym["shapes"].append({"k": "circle", "cx": r[2], "cy": r[3], "r": r[4]})
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elif t == "ELLIPSE":
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# KiCad 没有椭圆图元；长短轴相等就是圆，否则退化成外接圆（本工程里全是小圆点）
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sym["shapes"].append({"k": "circle", "cx": r[2], "cy": r[3], "r": max(r[4], r[5])})
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elif t == "ARC":
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sym["shapes"].append({"k": "arc", "sx": r[2], "sy": r[3],
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"mx": r[4], "my": r[5], "ex": r[6], "ey": r[7]})
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elif t == "TEXT":
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sym["texts"].append({"x": r[2], "y": r[3], "rot": r[4], "s": r[5]})
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elif t in ("DOCTYPE", "HEAD", "LINESTYLE", "FONTSTYLE"):
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pass
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else:
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# TABLE / TABEL_CELL / OBJ / GROUP 只出现在图框符号里，不是元件
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sym["skipped"].append(t)
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return sym
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