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pcbjam/docs/features/fork-cleanup/06-upstreamable-patches.md
Viktor Vaczi bfe4ae8be9 Kicad fork cleanup docs.
2026-06-15 11:32:12 +02:00

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06 — Upstreamable patches

Some of the diff is genuine bug fixes or standard portability guards that upstream KiCad / wxWidgets would plausibly accept. Once merged upstream, the divergence disappears on the next submodule bump — net-zero, and it's the right thing to do regardless. This doc is the submit list. Trim fork-specific comments (e.g. references to features/… paths) before sending.

Submit-ready bug fixes

RTree ELEMTYPEREAL overflow — libs/kimath/src/geometry/shape_poly_set.cpp (+9/−1)

splitCollinearOutlines() instantiated RTree<intptr_t, intptr_t, 2, intptr_t>. On wasm32 intptr_t is 32-bit, but ELEMTYPEREAL holds sumOfSquares values ~10¹⁴ → overflow → the rtree.h:1771 Classify assert fires on every PCB load. Every other KiCad RTree instantiation already uses double. The fix is intptr_t → double for the ELEMTYPEREAL template arg. This is an upstream typo, not a wasm issue — submit as-is. (Recorded in the rtree-intptr-overflow-fix memory.)

Default alternate hotkey never applied — common/tool/action_manager.cpp (+5)

processHotKey never copies m_defaultHotKeyAlt → m_hotKeyAlt, so DefaultHotkeyAlt() is dead in default configs upstream. One-line fix (aAction->m_hotKeyAlt = aAction->m_defaultHotKeyAlt;). Submit as a standalone bug fix. (Note: this is the real fix behind the Backspace-delete behavior; see 03 §2.)

Standard portability guards (no-ops for native builds)

These re-spell wasm-driven conditionals using the wx feature-test macros upstream already honors, so they're harmless on native and make the wasm build correct:

  • wxUSE_TOOLTIPS guards — include/widgets/wx_dataviewctrl.h (the DoSetToolTipText() override only exists when the base virtual does), common/dialogs/dialog_paste_special.cpp, common/widgets/wx_infobar.cpp, pcbnew/dialogs/dialog_board_reannotate.cpp. Re-spell the bare #ifndef __EMSCRIPTEN__ variants (in the dialogs from 05 §4) to #if wxUSE_TOOLTIPS and submit the lot.
  • wxUSE_FSWATCHER guards — include/pcb_base_frame.h, pcbnew/pcb_base_frame.cpp, eeschema/sch_base_frame.cpp/.h (watcher members + setFPWatcher/OnFPChange bodies). Standard feature test; upstream builds compile unchanged.
  • ngspice header guard — common/build_version.cpp (+3) shouldn't require <ngspice/sharedspice.h> when SPICE is off; the version-print dispatch already has an "unknown" fallback. (#ifdef KICAD_SPICE would be even cleaner.)

Output-correctness fixes

  • UTF-8 s-expr output — common/io/kicad/kicad_io_utils.cpp (+2/−2): Print("(%ls …)", aKey.wc_str()) → Print("(%s …)", aKey.ToUTF8().data()). %ls misbehaves in the wasm libc printf path; UTF-8 is strictly more correct for the format.
  • IWYU includes — gerbview/events_called_functions.cpp, gerbview/toolbars_gerber.cpp, gerbview/tools/gerbview_control.cpp add #include <wx/choice.h> (transitively present on native ports, missing on wasm). Pure include hygiene.
  • wxUniv choice fixes — eeschema/dialogs/dialog_sim_command.cpp (IsEmpty()→GetCount()>0), pcbnew/dialogs/panel_setup_layers.cpp (GetCurrentSelection()→GetSelection()), dialog_board_reannotate.cpp (wxS(" ")→wxT(" ") ternary-type fix). Correct on all ports.

Feature proposals (larger, medium prospects)

  • Drawing-sheet item KIID — the collab/yjs feature adds KIID m_Uuid to DS_DATA_ITEM and an optional (uuid …) token in .kicad_wks (common/drawing_sheet/drawing_sheet.keywords, drawing_sheet_parser.cpp +24, ds_data_model_io.cpp +4, include/drawing_sheet/ds_data_item.h +4). This is a real file-format change — no runtime hook can substitute (there's no drawing-sheet listener API upstream, and persistence is the point). But "give drawing-sheet items stable identity like every other EDA_ITEM" is a defensible upstream proposal, and the parser ignores-unknown so it's forward-compatible. If accepted, the format fork vanishes. (Related: 10 has no bearing here; the collab hook itself is in pl_editor_frame.cpp and stays — see below.)
  • python_scripting.h header hygiene — moving #include <Python.h> out of the header into the .cpp would dissolve the ~7 scripting include-gates across KiCad files (see ../../../features/python/research.md).
  • Plugin self-registration — moving the REGISTER_PLUGIN statics into each plugin's own .cpp (the pattern PCB_IO_MGR half-uses) lets the importer exclusions in 08 be pure CMake instead of #ifndef blocks in sch_io_mgr.cpp / pcb_io_mgr.cpp.

Not worth proposing

  • Optional protobuf — upstream explicitly keeps protobuf mandatory ("required even when the IPC API is not enabled … likely to be used in other applications in the future"). It doesn't matter anyway: our IPC-API gates are dead and get reverted (01).

The one collab hook that has no upstream home

pagelayout_editor/pl_editor_frame.cpp (+15) calls kicadCollabOnModify() from OnModify() under __EMSCRIPTEN__. There is no drawing-sheet listener/observer API upstream (pcbnew uses BOARD_LISTENER with zero source hooks; eeschema has SCHEMATIC_LISTENER; the drawing-sheet model has neither). So this hook genuinely stays — though 11 of its 15 lines are comment and can be trimmed. The clean exit is proposing a drawing-sheet OnModify notification upstream (low-medium prospect).