Method _remove_short_circuit_wires

SLiCAP/schematic/canvas.py:1174–1207

Remove single wire segments that directly short two pins of the same component. Only a segment whose *both* endpoints land exactly on pins of the same component is removed. This is the segment created when a component is placed or moved so that an existing wire passes direc

(self)

    # ── junction sync ─────────────────────────────────────────────────────────

    def _remove_short_circuit_wires(self) -> None:
        """Remove single wire segments that directly short two pins of the same component.

        Only a segment whose *both* endpoints land exactly on pins of the same
        component is removed.  This is the segment created when a component is
        placed or moved so that an existing wire passes directly between two of
        its pins; _split_through_wires() isolates that piece and this method
        cleans it up.

        Multi-hop paths (intentional connections such as a bulk–source tie
        routed with an elbow or through an intermediate node) are left intact.
        """
        changed = True
        while changed:
            changed = False
            comps = [i for i in self.items() if isinstance(i, ComponentItem)]
            pin_to_comp: dict[tuple, ComponentItem] = {}
            for comp in comps:
                for p in comp.pin_scene_pos():
                    pin_to_comp[_pt_key(p)] = comp

            for w in list(self.items()):
                if not isinstance(w, WireItem):
                    continue
                k0 = _pt_key(w.points[0])
                kn = _pt_key(w.points[-1])
                if k0 == kn:
                    continue        # zero-length wire, handled elsewhere
                c0 = pin_to_comp.get(k0)
                cn = pin_to_comp.get(kn)
                if c0 is not None and c0 is cn:
                    self.removeItem(w)
                    changed = True
                    break           # restart with a fresh scene snapshot

    def _merge_collinear_wires(self) -> None:
        """Remove duplicate wire segments and fuse collinear adjacent pairs.