subagent transcript

session 17f09f89 · workflow wf_7338a73f
← 17f09f89 · archive
delegated task
MISSION: push the FreeCAD->WebAssembly port from its current state toward the ~80% browser-parity ceiling in one coordinated effort. You are ONE agent
▸ Magik
MISSION: push the FreeCAD->WebAssembly port from its current state toward the ~80% browser-parity ceiling in one coordinated effort. You are ONE agent in a parallel swarm; do ONLY your assigned slice and return a precise spec the integrator will apply. The integrator (main loop) owns the single shared FreeCAD cmake reconfigure + ninja build + link; YOU DO NOT run the FreeCAD build. TOOLCHAIN / ENV: run `source /home/magik6k/lcad-wasm/env.sh` first (sets emsdk 4.0.12 + EM_CONFIG + the libclang-21->22 shim). Tools: emcc/em++/emar/emnm, host swig 4.4.1, host python 3.14, cmake, ninja. Constraints: emscripten single-thread (NO pthreads, QT_FEATURE_thread=-1), NO dlopen (static inittab), NO subprocess/QProcess, ASYNCIFY + JS-exceptions, static CPython 3.14 + Qt 6.11.1 asyncify + OCCT + Coin3D. `-lidbfs.js` is ALREADY in the link options. PATHS: - FreeCAD source (git repo, branch wasm-parity-push): /home/magik6k/lcad-wasm/freecad-port/FreeCAD (src/Mod/<WB>, src/Gui, src/App, src/3rdParty, src/Main/CMakeLists.txt) - wasm build tree: /opt/toolchains/src/freecad-gui-build (CMakeCache.txt, build.ninja) — READ ONLY for you; do not build here. - deploy: /home/magik6k/lcad-wasm/freecad-port/deploy (index.html, boot.py, *.data). Working M3 build is backed up in deploy-m3-backup/. - pyside-port build dir for sublib archives: /home/magik6k/lcad-wasm/pyside-port/build/<name> - Qt asyncify wasm: /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread ; python-wasm: /opt/toolchains/python-wasm (include/python3.14, lib) ; ICU: /opt/toolchains/icu-wasm HOW MODULES GET ENABLED (the proven pipeline — return these as DATA, do not edit the shared files yourself except your own module's source): 1. Cache flag: BUILD_<WB>=ON (cmake -D). Enabling it makes src/Mod/<WB>/CMakeLists build the <WB> and <WB>Gui STATIC libs (top-level CMakeLists.txt:91-107 rewrites SHARED/MODULE->STATIC under EMSCRIPTEN). In-tree 3rdParty deps (libE57Format, OndselSolver, libarea, Coin) build within this same tree when their consuming module is enabled. 2. inittab + link: the integrator adds a block to src/Main/CMakeLists.txt of the form if(BUILD_MESH) list(APPEND FREECAD_WASM_PY_MODULES Mesh) list(APPEND FREECAD_WASM_PY_GUI_MODULES MeshGui) endif() FREECAD_WASM_PY_MODULES entries are BOTH registered in the inittab (PyImport_AppendInittab("<name>", PyInit_<name>)) AND linked. Some modules build "_<Name>.a" and register the dotted/underscore name (e.g. PartDesign target -> _PartDesign, PartDesign/__init__.py does 'import _PartDesign'). Determine the exact PyInit symbol + registered name for YOUR module by reading its App/Gui CMakeLists (OUTPUT_NAME / target name) and its Init.py/__init__.py import. 3. External prebuilt archives (only pivy._coin) go in FREECAD_WASM_EXTRA_LINK_LIBS (a -Wl,--start-group;...;-Wl,--end-group list) + an inittab entry via FREECAD_WASM_EXTRA_PY_MODULES ("RegName=CInitSuffix", e.g. "PySide6.QtCore=QtCore"). 4. Python trees: modules ship a Python workbench tree (src/Mod/<WB>/*.py, InitGui.py) that must be packaged onto the wasm FS at /freecad/Mod/<WB> via emscripten file_packager into a supplementary .data loaded by index.html. List the tree path + mount; the integrator packs it. Current live inittab modules: Import,ImportGui,Materials,MatGui,Measure,MeasureGui,Part,PartGui,_PartDesign,PartDesignGui,Sketcher,SketcherGui,Spreadsheet,SpreadsheetGui,StartGui,Surface,SurfaceGui + PySide6.QtCore/QtGui/QtWidgets=QtCore/QtGui/QtWidgets + shiboken6.Shiboken=Shiboken. Current FREECAD_WASM_EXTRA_PY_MODULES: "shiboken6.Shiboken=Shiboken;PySide6.QtCore=QtCore;PySide6.QtGui=QtGui;PySide6.QtWidgets=QtWidgets". SINGLE-THREAD PATCHING: QtConcurrent/QThreadPool/std::async/std::thread do not work under QT_FEATURE_thread=-1. Convert to synchronous: QtConcurrent::blockingMapped(seq,fn)->serial std::transform; QtConcurrent::mapped -> serial loop; QtConcurrent::run(fn)+QFutureWatcher -> call fn() inline then invoke the finished handler directly. Preserve behavior. Patch ONLY your module's own source files (disjoint from other agents). Cite exact file:line. RETURN A PRECISE SPEC. Be concrete and evidence-based (grep/read the real files). Do NOT run the FreeCAD reconfigure/ninja. Apply source patches (Edit) only within your assigned files. YOUR SLICE — enable TechDraw (Tier 3). Read src/Mod/TechDraw/{App,Gui}/CMakeLists.txt (App: OCCT TKHLR built; deps Measure+Part+PartDesign+Import all live. Gui: QGraphicsView-based, Qt Svg/Xml/PrintSupport). CRITICAL single-thread rewrites: TechDraw/App/DrawViewPart.cpp (~382 QtConcurrent::run+QFutureWatcher HLR offload), DrawComplexSection.cpp (~270), DrawBrokenView.cpp, DrawViewDetail.cpp, DrawViewSection.cpp — convert each to synchronous inline HLR then invoke the finished handler directly. Grep the whole src/Mod/TechDraw for QtConcurrent/QFutureWatcher/QThreadPool and serialize ALL of them (this is the make-or-break). Determine registrations + package Templates/PAT/LineGroup/Symbols data + TechDrawTools Python. Return spec. High value: projected drawings/dimensions/sections.
Fable
thinking
I'm starting to explore the TechDraw module structure by checking the environment setup and examining the relevant CMakeLists and configuration files.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && git branch --show-current 2>/dev/null; echo \"---App CMake---\"; sed -n '1,120p' src/Mod/TechDraw/App/CMakeLists.txt", "description": "Show TechDraw App CMakeLists"}
tool result
wasm-parity-push
---App CMake---
set(TechDrawLIBS
    Measure
    Part
    Spreadsheet
    PartDesign
)

if (BUILD_IMPORT)
    list(APPEND TechDrawLIBS Import)
endif ()

list(APPEND TechDrawLIBS
    ${QtConcurrent_LIBRARIES}
    ${QtCore_LIBRARIES}
    ${QtWidgets_LIBRARIES}
)

generate_from_py(DrawHatch)
generate_from_py(DrawView)
generate_from_py(DrawPage)
generate_from_py(DrawViewPart)
generate_from_py(DrawViewSymbol)
generate_from_py(DrawTemplate)
generate_from_py(DrawParametricTemplate)
gen  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rn \"QtConcurrent\\|QFutureWatcher\\|QThreadPool\\|std::async\\|std::thread\\|QFuture\" src/Mod/TechDraw/ | grep -v \"_build\\|CMakeFiles\" | sort", "description": "Grep …
tool result
src/Mod/TechDraw/App/CMakeLists.txt:13:    ${QtConcurrent_LIBRARIES}
src/Mod/TechDraw/App/CMakeLists.txt:283:    ${QtConcurrent_INCLUDE_DIRS}
src/Mod/TechDraw/App/DrawBrokenView.cpp:55:#include <QtConcurrentRun>
src/Mod/TechDraw/App/DrawComplexSection.cpp:263:            QObject::connect(&m_alignWatcher, &QFutureWatcherBase::finished, &m_alignWatcher,
src/Mod/TechDraw/App/DrawComplexSection.cpp:270:        m_alignFuture = QtConcurrent::run(std::move(lambda));
src/Mod/TechDraw/App/DrawComplexSect  …[truncated]
Fable
thinking
I need to examine the rest of the App CMakeLists configuration including target naming and Python initialization, then check the Gui CMakeLists and where QtConcurrent is actually being used, particularly in DrawBrokenView.cpp.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '120,320p' src/Mod/TechDraw/App/CMakeLists.txt", "description": "Rest of App CMakeLists"}
tool result
    DrawBrokenView.h
)

SET(TechDraw_SRCS
    AppTechDraw.cpp
    AppTechDrawPy.cpp
    DrawUtil.cpp
    DrawUtil.h
    ShapeExtractor.cpp
    ShapeExtractor.h
    DrawDimHelper.cpp
    DrawDimHelper.h
    HatchLine.cpp
    HatchLine.h
    PreCompiled.h
    EdgeWalker.cpp
    EdgeWalker.h
    DrawProjectSplit.cpp
    DrawProjectSplit.h
    LineGroup.cpp
    LineGroup.h
    LineNameEnum.cpp
    LineNameEnum.h
    ArrowPropEnum.cpp
    ArrowPropEnum.h
    BalloonPropEnum.cpp
    BalloonPropEnum.h
  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"QtConcurrent\\|QFuture\\|blockingMapped\\|::run\\|::mapped\\|QThreadPool\" src/Mod/TechDraw/App/DrawBrokenView.cpp", "description": "Check DrawBrokenView concurrency …
tool result
55:#include <QtConcurrentRun>
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
I'm noticing that DrawBrokenView.cpp includes QtConcurrentRun without actually using it, so I need to trace through the build configuration in the App and Gui CMakeLists files, check the AppTechDraw initialization and Python module setup, and then examine where concurrency is actually being called in the codebase.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '320,400p' src/Mod/TechDraw/App/CMakeLists.txt; echo \"===INIT===\"; grep -n \"PyMODINIT\\|PyInit\\|initTechDraw\\|PyImport\" src/Mod/TechDraw/App/AppTechDraw.cpp src/Mo…
tool result
SET_BIN_DIR(TechDraw TechDraw /Mod/TechDraw)
SET_PYTHON_PREFIX_SUFFIX(TechDraw)

INSTALL(TARGETS TechDraw DESTINATION ${CMAKE_INSTALL_LIBDIR})
===INIT===
===__init__===
# ***************************************************************************
# *   Copyright (c) 2002 Juergen Riegel <juergen.riegel@web.de>             *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
# *              …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===Gui CMake===\"; cat src/Mod/TechDraw/Gui/CMakeLists.txt | grep -n \"add_library\\|SET_BIN\\|OUTPUT_NAME\\|Qt.*LIBRARIES\\|find_package\\|Svg\\|Xml\\|PrintSupport\\|SE…
tool result
===Gui CMake===
59:    TaskSurfaceFinishSymbols.ui
168:    TaskSurfaceFinishSymbols.ui
169:    TaskSurfaceFinishSymbols.cpp
170:    TaskSurfaceFinishSymbols.h
237:    QGCustomSvg.cpp
238:    QGCustomSvg.h
425:    TaskSurfaceFinishSymbols.ui
459:add_library(TechDrawGui SHARED
500:SET_BIN_DIR(TechDrawGui TechDrawGui /Mod/TechDraw)
501:SET_PYTHON_PREFIX_SUFFIX(TechDrawGui)
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
I need to understand how the module gets initialized by looking at the PyMODINIT and PyInit patterns in AppTechDrawPy.cpp, and comparing that against how other modules like Part handle their initialization.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rn \"PyInit_TechDraw\\|initTechDraw\\|PyMODINIT_FUNC\\|PyModuleDef\\|PyModule_Create\\|Py_InitModule\" src/Mod/TechDraw/App/*.cpp | head; echo \"===Gui init===\"; grep -r…
tool result
===Gui init===
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '459,520p' src/Mod/TechDraw/Gui/CMakeLists.txt; echo \"===Qt find in Gui/App===\"; grep -rn \"Concurrent\\|PrintSupport\\|Svg\\|Xml\" src/Mod/TechDraw/Gui/CMakeLists.txt…
tool result
add_library(TechDrawGui SHARED
    ${TechDrawGui_SRCS}
    ${TechDrawGuiView_SRCS}
    ${TechDrawGuiViewProvider_SRCS}
    ${TechDrawGuiNav_SRCS}
    ${TechDrawGuiIcon_SVG}
    ${TechDrawGuiFonts}
    ${MRTE_SRCS}
)

if(FREECAD_USE_PCH)
    target_precompile_headers(TechDrawGui PRIVATE
            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
    )
endif(FREECAD_USE_PCH)

target_include_directories(
    TechDrawGui
    PRIVATE
    ${CMAKE_BINARY_DIR}
    ${CMAKE_SOURCE_DIR  …[truncated]
Fable
thinking
I'm searching for the module initialization functions, likely in the AppTechDrawPy and AppTechDrawGuiPy files where initTechDraw would be defined.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rln \"PyInit\\|PyMODINIT\\|initModule\\|PyImport_App\" src/Mod/TechDraw/ ; echo \"---files---\"; ls src/Mod/TechDraw/App/*.cpp | grep -i \"app\\|init\"; ls src/Mod/TechDr…
tool result
src/Mod/TechDraw/App/AppTechDraw.cpp
src/Mod/TechDraw/App/CenterLinePyImp.cpp
src/Mod/TechDraw/App/CosmeticVertexPyImp.cpp
src/Mod/TechDraw/App/GeomFormatPyImp.cpp
src/Mod/TechDraw/App/AppTechDrawPy.cpp
src/Mod/TechDraw/App/CosmeticEdgePyImp.cpp
src/Mod/TechDraw/Gui/AppTechDrawGuiPy.cpp
src/Mod/TechDraw/Gui/AppTechDrawGui.cpp
---files---
src/Mod/TechDraw/App/AppTechDraw.cpp
src/Mod/TechDraw/App/AppTechDrawPy.cpp
src/Mod/TechDraw/App/ArrowPropEnum.cpp
src/Mod/TechDraw/App/BalloonPropEnum.cpp
src/  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"PyInit\\|PyMODINIT\\|PyModuleDef\\|initModule\\|module name\" src/Mod/TechDraw/App/AppTechDraw.cpp; echo \"===GUI===\"; grep -n \"PyInit\\|PyMODINIT\\|PyModuleDef\\|i…
tool result
68:    extern PyObject* initModule();
83:    PyObject* mod = TechDraw::initModule();
===GUI===
102:extern PyObject* initModule();
120:    PyObject* mod = TechDrawGui::initModule();
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '60,100p' src/Mod/TechDraw/App/AppTechDraw.cpp; echo \"===compare Part module init macro===\"; grep -rn \"PyInit_Part\\|initModule\\|PyMODINIT\" src/Mod/Part/App/AppPart…
tool result
#include "PropertyCosmeticEdgeList.h"
#include "PropertyCosmeticVertexList.h"
#include "PropertyGeomFormatList.h"
#include "DrawBrokenViewPy.h"



namespace TechDraw {
    extern PyObject* initModule();
}

/* Python entry */
PyMOD_INIT_FUNC(TechDraw)
{
    // load dependent module
    try {
        Base::Interpreter().loadModule("Part");
        Base::Interpreter().loadModule("Measure");
    }
    catch(const Base::Exception& e) {
        PyErr_SetString(PyExc_ImportError, e.  …[truncated]
Fable
thinking
The `PyMOD_INIT_FUNC` macro expands differently for each module—`TechDraw` becomes `PyInit_TechDraw` and `TechDrawGui` becomes `PyInit_TechDrawGui`—so I need to verify the Gui macro definition to confirm the pattern.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"PyMOD_INIT_FUNC\" src/Mod/TechDraw/Gui/AppTechDrawGui.cpp; echo \"===InitGui/import pattern===\"; grep -rn \"import TechDraw\\|FreeCADGui\\|AddLanguage\\|addLanguage\…
tool result
106:PyMOD_INIT_FUNC(TechDrawGui)
===InitGui/import pattern===
src/Mod/TechDraw/InitGui.py:45:        import TechDrawGui
src/Mod/TechDraw/InitGui.py:48:            import TechDrawTools
===TechDraw dir listing top===
App
CMakeLists.txt
ConversionUtilities
CSVdata
Gui
InitGui.py
Init.py
LineGroup
PAT
Patterns
Symbols
TDTest
techdraw.dox
TechDrawGlobal.h
TechDrawTools
[01;3  …[truncated]
Fable
thinking
I'm diving into the DrawViewPart.cpp file to examine the concurrency issues and start working on patches for that section.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '340,445p' src/Mod/TechDraw/App/DrawViewPart.cpp", "description": "DrawViewPart HLR offload region"}
tool result
    }
    //    BRepTools::Write(inOutShape, "DVPScaled.brep");            //debug
    return centeredShape;
}

//! create a geometry object and trigger the HLR process in another thread
TechDraw::GeometryObjectPtr DrawViewPart::buildGeometryObject(const TopoDS_Shape& shape,
                                                              const gp_Ax2& viewAxis)
{
    TechDraw::GeometryObjectPtr go(
        std::make_shared<TechDraw::GeometryObject>(getNameInDocument(), this));
    go->setIsoCount(  …[truncated]
Fable
thinking
I see the pattern now—the simplest approach is to replace the QtConcurrent::run call with synchronous inline execution and then invoke the finished handler directly. There's already a fallback path for when the GUI isn't up that does something similar, running projectShape synchronously and returning the result, though it doesn't call onHlrFinished in that case.

The safest transformation preserves the connect-and-finished-handler semantics but executes synchronously: run the projectShape lambda inline, then call onHlrFinished() directly. The waitingForHlr state transitions (true then false) will still work fine in this synchronous flow, and I need to check the caller chain to make sure call  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"buildGeometryObject\\|onHlrFinished\\|partExec\\|waitingForHlr\\|m_tempGeometryObject\" src/Mod/TechDraw/App/DrawViewPart.cpp | head -40", "description": "Find caller…
tool result
101:      m_tempGeometryObject(nullptr),
105:      m_waitingForHlr(false)
235:    if (waitingForHlr()) {
252:    partExec(shape);
293:void DrawViewPart::partExec(TopoDS_Shape& shape)
295:    if (waitingForHlr()) {
301:    m_tempGeometryObject = makeGeometryForShape(shape);
304:        onHlrFinished();//poly algo and console mode do not run in separate thread, so we need to invoke
324:    return buildGeometryObject(localShape, getProjectionCS());
346:TechDraw::GeometryObjectPtr DrawViewPart::buil  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '293,325p' src/Mod/TechDraw/App/DrawViewPart.cpp", "description": "partExec body"}
tool result
void DrawViewPart::partExec(TopoDS_Shape& shape)
{
    if (waitingForHlr()) {
        //finish what we are already doing before starting a new cycle
        return;
    }

    //we need to keep using the old geometryObject until the new one is fully populated
    m_tempGeometryObject = makeGeometryForShape(shape);
    if (CoarseView.getValue() ||
        !DU::isGuiUp()) {
        onHlrFinished();//poly algo and console mode do not run in separate thread, so we need to invoke
                      …[truncated]
Fable
thinking
The execution flow goes through partExec, which calls makeGeometryForShape, then buildGeometryObject to set up the shape projection. Right now it only manually triggers the completion callback for the coarse/non-GUI case, but the cleanest fix would be to make the GUI branch also execute the projection synchronously inline, matching the non-GUI path so partExec can handle completion uniformly.

However, there's a timing issue: onHlrFinished() relies on m_tempGeometryObject being set, but that assignment happens in partExec *after* makeGeometryForShape returns, so calling it inside buildGeometryObject would see the stale value instead of the newly constructed geometry object.

The solution is   …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=====DrawViewSection 455-505=====\"; sed -n '455,505p' src/Mod/TechDraw/App/DrawViewSection.cpp; echo \"=====onCutFinished / caller=====\"; grep -n \"onCutFinished\\|mak…
tool result
=====DrawViewSection 455-505=====
void DrawViewSection::sectionExec(TopoDS_Shape& baseShape)
{
    if (waitingForHlr() || waitingForCut()) {
        return;
    }

    if (baseShape.IsNull()) {
        // should be caught before this
        return;
    }

    m_cuttingTool = makeCuttingTool(m_shapeSize);

    if (!DU::isGuiUp()) {
        // without the gui we will never be informed of completion of the separate thread
        makeSectionCut(baseShape);
        waitingForCut(false);
        onS  …[truncated]
Fable
thinking
DrawViewSection is straightforward—the non-GUI branch already handles things synchronously, so I'll make the GUI-up path synchronous as well. The destructor's QFuture checks are harmless to leave since a default-constructed QFuture returns false for isRunning(). The tricky part is that onSectionCutFinished calls buildGeometryObject, which itself triggers HLR operations.

For the GUI branch, I'm replacing the async logic with a direct synchronous call to makeSectionCut, then immediately calling onSectionCutFinished to complete the flow. Rather than a complex refactor, I'll just simplify the try-catch block to run synchronously while keeping the overall structure intact.

Next I need to handle  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=====DrawComplexSection 235-290=====\"; sed -n '235,290p' src/Mod/TechDraw/App/DrawComplexSection.cpp; echo \"=====alignWatcher/Future usage=====\"; grep -n \"m_alignFut…
tool result
=====DrawComplexSection 235-290=====
        return {};
    }

    // our shape is already centered "left/right" and "up/down" so we don't need to
    // center it here
    m_preparedShape = ShapeUtils::scaleShape(m_alignResult, getScale());
    if (!DrawUtil::fpCompare(Rotation.getValue(), 0.0)) {
        m_preparedShape =
            ShapeUtils::rotateShape(m_preparedShape, getProjectionCS(), Rotation.getValue());
    }

    if (debugSection()) {
        BRepTools::Write(m_preparedShape, "DCSp  …[truncated]
Fable
thinking
I'm looking at how DrawComplexSection handles section cutting—it currently spawns makeAlignedPieces on a thread while synchronously calling DrawViewSection::makeSectionCut on the base shape, then waits for both futures to complete. For a single-threaded approach, I'd run makeAlignedPieces synchronously first, then call DrawViewSection::makeSectionCut, though I need to be careful about the ordering and dependencies.

The key insight is that DrawComplexSection::makeSectionCut is called virtually from the base sectionExec, which then calls onSectionCutFinished afterward—so with synchronous execution, the futures will be default-constructed and isRunning() will return false, allowing onSectionCu  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=====DrawViewDetail 175-230=====\"; sed -n '175,230p' src/Mod/TechDraw/App/DrawViewDetail.cpp; echo \"=====detail waitingForDetail/onDetailFinished=====\"; grep -n \"onD…
tool result
=====DrawViewDetail 175-230=====

    dvp->requestPaint();//to refresh detail highlight in base view
    return DrawView::execute();
}

//try to create a detail of the solids & shells in shape
//if there are no solids/shells in shape, use the edges in shape
void DrawViewDetail::detailExec(TopoDS_Shape& shape, DrawViewPart* dvp, DrawViewSection* dvs)
{
    if (waitingForHlr() || waitingForDetail()) {
        return;
    }

    if (!DU::isGuiUp()) {
        makeDetailShape(shape, dvp, dvs);
        …[truncated]
Fable
thinking
I'm noticing there's a bug in the original detailExec where the non-GUI path doesn't return, causing it to fall through into the threaded execution. Since the wasm environment has the GUI up anyway, I'll refactor this to make the GUI path synchronous and replace the entire threaded block.

Writing detailExec function...

The new version checks if we're already waiting for HLR or detail work, then calls makeDetailShape directly and triggers the completion handler. The onMakeDetailFinished call does a QObject::disconnect on a default QMetaObject::Connection, which is safe even if it was never connected.

Now checking DrawBrokenView.cpp — it includes QtConcurrentRun but doesn't actually use it   …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===Gui concurrency===\"; grep -rn \"QtConcurrent\\|QFutureWatcher\\|QThreadPool\\|std::async\\|std::thread\\|QtConcurrentRun\\|::mapped\\|blockingMapped\" src/Mod/TechDr…
tool result
===Gui concurrency===
===onFacesFinished/onSectionCutFinished defs===
390:void DrawViewPart::onHlrFinished()
712:void DrawViewPart::onFacesFinished()
===waitingForAlign def===
src/Mod/TechDraw/App/DrawComplexSection.h:120:    void waitingForAlign(bool s) { m_waitingForAlign = s; }
src/Mod/TechDraw/App/DrawComplexSection.h:121:    bool waitingForAlign() const { return m_waitingForAlign; }
src/Mod/TechDraw/App/DrawComplexSection.h:194:    bool m_waitingForAlign;
src/Mod/TechDraw/App/DrawComplexSec  …[truncated]
Fable
thinking
Now I'm checking the Gui CMakeLists to see which Qt modules are required, like Svg, Xml, and PrintSupport, and looking at how the libraries are configured with find_package and TechDrawGui_LIBS.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '1,60p' src/Mod/TechDraw/Gui/CMakeLists.txt", "description": "Top of Gui CMakeLists for libs"}
tool result
if(MSVC)
    add_compile_options(/utf-8)
endif(MSVC)

# In previous versions this target copied mtextedit.h to the binary directory that causes
# automoc to generate linking errors.
if(NOT ${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
    if (EXISTS ${CMAKE_CURRENT_BINARY_DIR}/mtextedit.h)
        file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/mtextedit.h)
        execute_process(COMMAND "${CMAKE_COMMAND}" -E touch_nocreate "${CMAKE_CURRENT_SOURCE_DIR}/mtextedit.h")
    endif()
endif()

# The XML f  …[truncated]
Fable
thinking
I need to verify whether Qt's Svg, Xml, and PrintSupport modules are available in the asyncify build, since TechDrawGui_LIBS depends on TechDraw and FreeCADGui which should provide these transitively. Let me check what Qt modules the current wasm build actually links against by examining the CMakeCache or build artifacts.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===Gui Qt module usage===\"; grep -rln \"QSvgRenderer\\|QSvgGenerator\\|QtSvg\\|QPrinter\\|QPrintDialog\\|QtPrintSupport\\|QPrintPreview\" src/Mod/TechDraw/Gui/ | sed 's…
tool result
===Gui Qt module usage===
MDIViewPage.cpp
MDIViewPage.h
PagePrinter.cpp
PagePrinter.h
QGCustomSvg.cpp
QGCustomSvg.h
QGIFace.cpp
QGIFace.h
QGIRichAnno.cpp
QGISVGTemplate.cpp
QGISVGTemplate.h
QGIViewBalloon.cpp
QGIViewDimension.cpp
QGSPage.cpp
===count===
4
===Qt asyncify libs===
libQt6PrintSupport.a
libQt6PrintSupport.prl
libQt6Svg.a
libQt6Svg.prl
libQt6SvgWidgets.a
libQt6SvgWidgets.prl
libQt6Xml.a
libQt6Xml.prl
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
The Qt modules I need are available in the asyncify build, so the Gui module should link fine. I need to verify that TechDrawGui's dependencies—libQt6Svg.a, libQt6PrintSupport.a, libQt6Xml.a, and libQt6SvgWidgets.a—are either included in the final link's EXTRA_LINK_LIBS or already pulled in by FreeCADGui.
Fable
⚙ Bash {"command": "grep -oE \"libQt6[A-Za-z]+\\.a\" /opt/toolchains/src/freecad-gui-build/build.ninja 2>/dev/null | sort -u; echo \"=== check EXTRA_LINK or main link ===\"; grep -rn \"Qt6Svg\\|Qt6PrintSupport\\|Qt6Xml\\|Qt6SvgWidgets\" /opt/toolc…
tool result
libQt6BundledLibjpeg.a
libQt6BundledLibpng.a
libQt6Concurrent.a
libQt6Core.a
libQt6Gui.a
libQt6Network.a
libQt6OpenGL.a
libQt6OpenGLWidgets.a
libQt6PrintSupport.a
libQt6Svg.a
libQt6SvgWidgets.a
libQt6UiTools.a
libQt6Widgets.a
libQt6Xml.a
=== check EXTRA_LINK or main link ===
/opt/toolchains/src/freecad-gui-build/build.ninja:20784:build bin/FreeCAD.js: CXX_EXECUTABLE_LINKER__FreeCADMain_Release src/Main/CMakeFiles/FreeCADMain.dir/FreeCADMain_autogen/mocs_compilation.cpp.o src/Main/CMakeFiles/Free  …[truncated]
Fable
thinking
The Qt libraries needed for TechDrawGui are already included in the current link configuration, so I don't need to add anything there. Now I'm checking the Python structure in TechDrawTools and InitGui.py, along with the data directories like Templates, Symbols, Patterns, and LineGroup to understand the full packaging setup.

The CMake build copies these data directories to the build output, but for WebAssembly packaging via file_packager, I need to reference the actual source directories since the runtime expects them mounted at /freecad/Mod/TechDraw/. I should verify how other modules are mounted in the existing deployment setup, then examine InitGui.py to see what resource paths it refere  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw && echo \"===py files at root===\"; ls *.py; echo \"===TechDrawTools===\"; ls TechDrawTools/ | head; echo \"===data dirs sizes===\"; du -sh Templates Symbols Patt…
tool result
===py files at root===
InitGui.py
Init.py
TestTechDrawApp.py
TestTechDrawGui.py
===TechDrawTools===
CommandAxoLengthDimension.py
CommandFillTemplateFields.py
CommandHoleShaftFit.py
CommandMoveView.py
CommandPositionSectionView.py
CommandShareView.py
CommandVertexCreations.py
__init__.py
TaskAddOffsetVertex.py
TaskFillTemplateFields.py
===data dirs sizes===
3.4M	Templates
560K	Symbols
220K	Patterns
4.0K	PAT
28K	LineGroup
4.0K	CSVdata
8.0K	ConversionUtilities
===Templates sample===
ASM  …[truncated]
Fable
thinking
I need to trace where the runtime loads these data files by checking how Preferences.cpp constructs the resource paths using App::Application::getResourceDir() combined with the TechDraw module subdirectories like LineGroup, Patterns, PAT, Templates, and Symbols. The build system installs these to ${CMAKE_INSTALL_DATADIR}/Mod/TechDraw/ with their respective subdirectories, so I'm verifying the mount point matches between build and runtime.

In the WebAssembly deployment, the FreeCAD resource directory is mounted at /freecad based on the module structure /freecad/Mod/<WB>, so I need to check how other modules' data gets mounted and confirm where getResourceDir() actually points by looking at   …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw && grep -rn \"getResourceDir\\|Mod/TechDraw\\|LineGroup\\|Patterns\\|/PAT\\|Symbols/\\|Templates/\" App/Preferences.cpp App/LineGroup.cpp App/HatchLine.cpp App/Li…
tool result
App/LineGenerator.cpp:43:#include <Mod/TechDraw/App/Preferences.h>
App/LineGenerator.cpp:44:#include <Mod/TechDraw/App/DrawUtil.h>
App/LineGenerator.cpp:45:#include <Mod/TechDraw/App/LineNameEnum.h>
App/Preferences.cpp:49:    return App::GetApplication().GetUserParameter().GetGroup("BaseApp/Preferences/Mod/TechDraw")->GetGroup(Name);
App/Preferences.cpp:176:    return getPreferenceGroup("Decorations")->GetInt("LineGroup", 3);  // FC 0.70mm
App/Preferences.cpp:197:    std::string defaultDir = App  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/deploy && ls *.data *.js 2>/dev/null | head; echo \"===mounts in index.html===\"; grep -n \"Mod/\\|/freecad\\|preloadPlugins\\|packagePrefix\\|data\\b\\|\\.data\" index.html 2>/dev/null |…
tool result
freecad.data
freecad.data.js
FreeCAD.js
freecad-mods.data
freecad-mods.data.js
freecad-pyside.data
freecad-pyside.data.js
===mounts in index.html===
53:      E.FREECAD_HOME = '/freecad/';
75:      // Emscripten download progress: "Downloading data... (x/y)"
86:<script src="freecad.data.js"></script>
87:<!-- Supplementary preload packages for modules added after the base freecad.data
88:     was built (their Python trees mount into /freecad/Mod/*; C++ icons are in the
90:<script src="freecad-mods  …[truncated]
Fable
thinking
So the resource directory structure is rooted at `/freecad/Mod/TechDraw/`, with templates, line groups, symbols, patterns, and PAT files in their respective subdirectories, while Python modules like InitGui.py and Init.py sit at the top level alongside the TechDrawTools directory. Now I should look at how other FreeCAD modules organize their data to understand the packaging pattern.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port && echo \"===packaging scripts===\"; ls *.sh deploy/*.sh 2>/dev/null; grep -rln \"file_packager\\|freecad-mods\" --include=*.sh --include=*.py . 2>/dev/null | head; echo \"===what mods ar…
tool result
===packaging scripts===
(eval):1: no matches found: *.sh
(eval):1: no matches found: --include=*.sh
===what mods are packaged now===
Mod/Import
Mod/Measure
Mod/PartDesign
Mod/Show
Mod/Spreadsheet
Mod/Surface
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port && grep -rln \"file_packager\\|freecad-mods.data\\|--preload\" . 2>/dev/null | grep -v node_modules | grep -v \"\\.data\" | head; echo \"===mods data listing paths===\"; grep -oE '\"/free…
tool result
deploy-t1/test-memfs.js
deploy-t1/FreeCADCmd.js
deploy-gui/FreeCAD.js
deploy/FreeCAD.js
deploy-m3-backup/FreeCAD.js
deploy-jspi/FreeCAD.js
deploy/index.html
===mods data listing paths===
"/freecad/Mod/Import"
"/freecad/Mod/Import"
"/freecad/Mod/Import"
"/freecad/Mod/Import/Resources"
"/freecad/Mod/Measure"
"/freecad/Mod/Measure"
"/freecad/Mod/Measure/Gui"
"/freecad/Mod/Measure/Gui/Resources"
"/freecad/Mod/PartDesign"
"/freecad/Mod/PartDesign"
"/freecad/Mod/PartDesign/Gui"
"/freecad/Mod/PartDesig  …[truncated]
Fable
thinking
The packaging structure maps the source tree under `src/Mod/<WB>` to `/freecad/Mod/<WB>`, so for TechDraw that means packaging `src/Mod/TechDraw` to mount at `/freecad/Mod/TechDraw`, which includes both the Python modules and data directories like Templates, LineGroup, Symbols, Patterns, and PAT files. However, the GUI icons are handled differently—they're compiled from SVG resources into Qt resource files rather than being packaged directly from the source tree.

The challenge is that Preferences.cpp reads these data directories from the filesystem at runtime using `getResourceDir()+"Mod/TechDraw/..."`, so they need to be present in the final package. While packaging the entire `src/Mod/Tec  …
Fable
Now let me apply the single-thread source patches. First DrawViewPart.cpp buildGeometryObject:
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp", "offset": 363, "limit": 25}
tool result
363	
364	    if (!DU::isGuiUp()) {
365	        // if the Gui is not running (actual the event loop), we cannot use the separate thread,
366	        // since we will never be notified of thread completion.
367	        go->projectShape(shape, viewAxis);
368	        return go;
369	    }
370	
371	    //projectShape (the HLR process) runs in a separate thread since it can take a long time
372	    //note that &m_hlrWatcher in the third parameter is not strictly required, but using the
373	    //4 para  …[truncated]
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp", "old_string": " if (!DU::isGuiUp()) {\n // if the Gui is not running (actual the event loop), we cannot use …
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp", "old_string": " m_tempGeometryObject = makeGeometryForShape(shape);\n if (CoarseView.getValue() ||\n !DU:…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
Now the face-finding offload in onHlrFinished:
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp", "old_string": " if (handleFaces() && !CoarseView.getValue()) {\n try {\n //note that &m_faceWatch…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewPart.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
Checking what onFacesFinished does — it should be handling the waitingForFaces state and disconnecting the face watcher, then moving on to DrawViewSection.
Fable
Now DrawViewSection.cpp:
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewSection.cpp", "old_string": " try {\n // note that &m_cutWatcher in the third parameter is not strictly required,\n …
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewSection.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
Looking at DrawComplexSection::makeSectionCut, which is a virtual override invoked by DrawViewSection::sectionExec. My patch modifies the flow so sectionExec calls makeSectionCut on the base shape, then sets waitingForCut to false, and finally triggers onSectionCutFinished. The current implementation checks the strategy—if it's 0, it delegates to the parent class's makeSectionCut, otherwise it offloads to makeAligned.

For the synchronous approach, I need to run makeAlignedPieces inline first, then call DrawViewSection::makeSectionCut. Since DrawComplexSection::onSectionCutFinished checks whether both m_cutFuture and m_alignFuture are still running, and both default to false with default fut  …
Fable
Now DrawComplexSection.cpp:
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawComplexSection.cpp", "old_string": " try {\n connectAlignWatcher =\n QObject::connect(&m_alignWatcher, &QFutureW…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawComplexSection.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
Now I'm moving on to edit the detailExec function in DrawViewDetail.cpp.
Fable
Now DrawViewDetail.cpp:
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewDetail.cpp", "old_string": " if (!DU::isGuiUp()) {\n makeDetailShape(shape, dvp, dvs);\n onMakeDetailFinished();…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewDetail.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
Looking at the onMakeDetailFinished function to see if there's an early return guard on `!DU::isGuiUp()` that would bypass the synchronous path we're trying to ensure always runs.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '395,425p' src/Mod/TechDraw/App/DrawViewDetail.cpp; echo \"===onFacesFinished head===\"; sed -n '712,735p' src/Mod/TechDraw/App/DrawViewPart.cpp", "description": "Verify…
tool result
void DrawViewDetail::onMakeDetailFinished(void)
{
    waitingForDetail(false);
    QObject::disconnect(connectDetailWatcher);

    m_tempGeometryObject = buildGeometryObject(m_scaledShape, m_viewAxis);
    if (!DU::isGuiUp()) {
        onHlrFinished();
    }
}

bool DrawViewDetail::waitingForResult() const
{
    if (DrawViewPart::waitingForResult() || waitingForDetail()) {
        return true;
    }
    return false;
}
TopoDS_Shape DrawViewDetail::projectEdgesOntoFace(TopoDS_Shape& edgeShape, To  …[truncated]
Fable
thinking
I'm noticing a critical issue in the control flow: when `onMakeDetailFinished` calls `buildGeometryObject`, it now runs the shape projection synchronously and stores the result, then checks if the GUI is up. In GUI mode (wasm), it skips calling `onHlrFinished`, but the original design had `buildGeometryObject` offload the HLR work to a background thread, with the completion signal triggering `onHlrFinished` later—so the async callback chain is now broken in GUI mode.

I need to fix this by removing the `!DU::isGuiUp()` guard and always calling `onHlrFinished` directly after `buildGeometryObject` returns, since the work is now synchronous. I also need to check `DrawViewSection::onSectionCutFi  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===all buildGeometryObject callers===\"; grep -rn \"buildGeometryObject\" src/Mod/TechDraw/App/; echo; echo \"===DrawViewSection onSectionCutFinished 621-650===\"; sed -…
tool result
===all buildGeometryObject callers===
src/Mod/TechDraw/App/DrawViewMulti.cpp:121:        geometryObject = buildGeometryObject(mirroredShape, viewAxis);
src/Mod/TechDraw/App/DrawComplexSection.cpp:40://    geometryObject = DVP::buildGeometryObject(m_preparedShape)  (HLR)
src/Mod/TechDraw/App/DrawProjectSplit.cpp:88:    TechDraw::GeometryObjectPtr go = buildGeometryObject(scaledShape, viewAxis);
src/Mod/TechDraw/App/DrawProjectSplit.cpp:107:TechDraw::GeometryObjectPtr DrawProjectSplit::buildGeomet  …[truncated]
Fable
thinking
I'm seeing that buildGeometryObject is now synchronous, so multiple call sites that previously waited for the m_hlrWatcher.finished signal are now directly invoking onHlrFinished, each protected by a guard checking if the GUI is active. Looking at DrawViewSection::onSectionCutFinished as an example, it's calling buildGeometryObject and then conditionally triggering onHlrFinished based on that GUI state check.

Since HLR is now always synchronous, I need to update those guards in DrawViewSection, DrawViewDetail, and DrawViewMulti to always call onHlrFinished rather than conditionally. DrawProjectSplit uses its own static buildGeometryObject so it's unaffected, and DrawViewPart's makeGeometryF  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '95,140p' src/Mod/TechDraw/App/DrawViewMulti.cpp", "description": "DrawViewMulti buildGeometryObject caller context"}
tool result
    const std::vector<App::DocumentObject*>& links = Sources.getValues();
    if (links.empty())  {
        Base::Console().log("INFO - DVM::execute - No Sources - creation?\n");
        return DrawView::execute();
    }

    m_compound = TopoDS::Compound(getSourceShape());
    if (m_compound.IsNull()) {
        return new App::DocumentObjectExecReturn("DVP - Linked shape object(s) is invalid");
    }
    TopoDS_Compound comp = m_compound;

    gp_Pnt inputCenter;
    try {
        inputCenter =  …[truncated]
Fable
thinking
DrawViewMulti::execute takes a different approach—it directly assigns the geometry object from buildGeometryObject without going through m_tempGeometryObject or calling onHlrFinished. Instead, it handles the face extraction and paint request itself, so no changes are needed there since the synchronous buildGeometryObject already populates the geometry with the projected shape data.

For cases 1 and 2, I need to remove the GUI check and make the onHlrFinished call unconditional in both DrawViewSection.cpp at line 627 and DrawViewDetail.cpp at line 401—they have identical conditional blocks that need to be simplified.
Fable
The finished handlers guard the explicit `onHlrFinished()` behind `!DU::isGuiUp()`, but HLR is now always synchronous. Fixing both:
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewSection.cpp", "old_string": " // display geometry for cut shape is in geometryObject as in DVP\n m_tempGeometryObject = bui…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewSection.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
⚙ Edit {"replace_all": false, "file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewDetail.cpp", "old_string": " m_tempGeometryObject = buildGeometryObject(m_scaledShape, m_viewAxis);\n if (!DU::isGuiUp()) {…
tool result
The file /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/App/DrawViewDetail.cpp has been updated successfully. (file state is current in your context — no need to Read it back)
Fable
thinking
There's a reentrancy consideration with DrawViewSection::onSectionCutFinished where the base class's onHlrFinished eventually triggers postHlrTasks, which is virtual and can call back into DrawViewSection::postHlrTasks, potentially invoking sectionExec again for auto-scaling. This recursive pattern already existed in the original console-mode path, so it's a known and handled scenario.

The guards in sectionExec and partExec that check `waitingForHlr()` or `waitingForCut()` will simply not trigger now since those flags are never set to true anymore — which is correct for the synchronous execution model. The temporary geometry object handling in partExec remains unchanged from the original be  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===remaining QtConcurrent::run / setFuture===\"; grep -rn \"QtConcurrent::run\\|QtConcurrent::mapped\\|QtConcurrent::blocking\\|\\.setFuture\\|QThreadPool\\|std::async\\…
tool result
===remaining QtConcurrent::run / setFuture===
===DONE===
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
The QtConcurrent references have been cleaned up—only harmless includes and member declarations remain. Now I'm checking InitGui.py to see how the workbench registers and whether there are any missing dependencies or issues.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Mod/TechDraw/InitGui.py"}
tool result
1	# ***************************************************************************
2	# *   Copyright (c) 2002,2003 Juergen Riegel <juergen.riegel@web.de>        *
3	# *                                                                         *
4	# *   This file is part of the FreeCAD CAx development system.              *
5	# *                                                                         *
6	# *   This program is free software; you can redistribute it and/or modify  *
7	# *   it under the  …[truncated]
Fable
thinking
The icon path references FreeCAD's resource directory, which gets copied during the build process to the datadir, but for WebAssembly builds the icon needs to be accessible at a different location in the filesystem hierarchy.

The challenge is that the CMake build flattens the directory structure—it copies icons from `Gui/Resources/icons/` in the source tree to `Mod/TechDraw/Resources/icons/` in the build datadir. If I just mount the source tree directly, the icon would be at `Mod/TechDraw/Gui/Resources/icons/`, which doesn't match the expected runtime path. I need to either replicate that flattened structure or adjust how the icon path is resolved.

Let me check how existing modules like Me  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/deploy && echo \"===base freecad.data: PartDesign Resources icons===\"; grep -oE '\"/freecad/Mod/PartDesign/Resources/icons/[^\"]*\"' freecad.data.js 2>/dev/null | head -5; echo \"===Meas…
tool result
===base freecad.data: PartDesign Resources icons===
===Measure Resources icons in base===
===Measure in mods.data Gui/Resources===
"/freecad/Mod/Measure/Gui/Resources/icons/COG-Icon.svg"
"/freecad/Mod/Measure/Gui/Resources/icons/COV-Icon.svg"
"/freecad/Mod/Measure/Gui/Resources/icons/MassPropertiesIcon.svg"
"/freecad/Mod/Measure/Gui/Resources/icons/Measurement-Angle.svg"
"/freecad/Mod/Measure/Gui/Resources/icons/Measurement-Area.svg"
===where is preferences-techdraw.svg in source===
src/Mod/Tech  …[truncated]
Fable
thinking
I'm checking how the Measure workbench resolves its icon path — whether it uses the source tree layout under Gui/Resources or a Qt resource path. Since the installed flattened layout doesn't include Mod/Measure/Resources, the modules must be relying on the source directory structure.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===Measure InitGui Icon===\"; grep -n \"Icon\\|Resources\" src/Mod/Measure/InitGui.py; echo \"===PartDesign InitGui Icon===\"; grep -n \"Icon\\|Resources\\|getResourceDi…
tool result
===Measure InitGui Icon===
===PartDesign InitGui Icon===
37:        self.__class__.Icon = (
38:            FreeCAD.getResourceDir() + "Mod/PartDesign/Resources/icons/PartDesignWorkbench.svg"
===Surface===
37:    Icon = os.path.join(
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
PartDesign references its icon using the flattened installed directory structure, but when I search the actual freecad.data for that icon path, it doesn't show up—which suggests either the icon file is missing (resulting in a fallback default) or it's being packaged differently than expected.

Since PartDesign itself works fine in the current build, a missing workbench icon is purely cosmetic and non-blocking. For TechDraw, I should package the icon directory from src/Mod/TechDraw/Gui/Resources/icons to /freecad/Mod/TechDraw/Resources/icons to match what InitGui expects, mirroring how CMake handles the source tree layout. If that's omitted, it's just a visual gap, not a functional problem.

  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rn \"BUILD_TECHDRAW\\|BUILD_TechDraw\" CMakeLists.txt src/Mod/CMakeLists.txt cMake/ 2>/dev/null | head; echo \"===Mod CMakeLists TechDraw entry===\"; grep -n \"TECHDRAW\\…
tool result
cMake/FreeCAD_Helpers/CheckInterModuleDependencies.cmake:22:    REQUIRES_MODS(BUILD_DRAFT              BUILD_SKETCHER BUILD_TECHDRAW)
cMake/FreeCAD_Helpers/CheckInterModuleDependencies.cmake:45:    REQUIRES_MODS(BUILD_TECHDRAW           BUILD_PART BUILD_PART_DESIGN BUILD_SPREADSHEET BUILD_MEASURE BUILD_IMPORT)
src/Mod/CMakeLists.txt:117:if(BUILD_TECHDRAW)
src/Mod/CMakeLists.txt:119:endif(BUILD_TECHDRAW)
cMake/FreeCAD_Helpers/InitializeFreeCADBuildOptions.cmake:176:    option(BUILD_TECHDRAW "Buil  …[truncated]
Fable
thinking
BUILD_TECHDRAW is currently disabled but needs to be turned on. I'm checking its dependencies—BUILD_PART, BUILD_PART_DESIGN, BUILD_SPREADSHEET, BUILD_MEASURE, and BUILD_IMPORT—and they're all already enabled in the current configuration, so we're good there. Now I need to verify that the App CMake is properly linking QtConcurrent.

The libQt6Concurrent.a library is already in the link line, which is necessary since we're using its headers and members. The App target also links against Measure, Part, Spreadsheet, and PartDesign (plus optional Import), all of which are built. I notice TechDrawLIBS references PartDesign, and while the output name is _PartDesign, the CMake target name is PartDes  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"===subprocess/system in TechDraw===\"; grep -rn \"QProcess\\|std::system\\|::system(\\|popen\\|fork(\" src/Mod/TechDraw/ | grep -v CMakeFiles | head; echo \"===DrawViewA…
tool result
===subprocess/system in TechDraw===
===DrawViewArch deps===
31:#include "DrawViewArch.h"
===MRTE / QGVPage GL usage (Gui webgl concerns)===
src/Mod/TechDraw/Gui/QGVPage.cpp
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
I'm checking whether QGraphicsView is using a QOpenGLWidget viewport in QGVPage.cpp, which could be problematic under WebAssembly even though QtOpenGL is linked. The issue might be with how the viewport is being set up.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"QOpenGL\\|setViewport\\|QGLWidget\\|opengl\\|OpenGLWidget\" src/Mod/TechDraw/Gui/QGVPage.cpp | head", "description": "QGVPage OpenGL viewport usage"}
tool result
30:#include <QOpenGLWidget>
324:        setViewport(new QOpenGLWidget);
325:        setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
329:        setViewport(new QWidget);
330:        setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '315,335p' src/Mod/TechDraw/Gui/QGVPage.cpp", "description": "Context of OpenGL viewport toggle"}
tool result
    painter->restore();
}

void QGVPage::setRenderer(RendererType type)
{
    m_renderer = type;

    if (m_renderer == RendererType::OpenGL) {
#ifndef QT_NO_OPENGL
        setViewport(new QOpenGLWidget);
        setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
#endif
    }
    else {
        setViewport(new QWidget);
        setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
    }
}

void QGVPage::setHighQualityAntialiasing(bool highQualityAntialiasing)
{
zshexit:1: parameter H  …[truncated]
Fable
thinking
The OpenGL viewport is only activated when users explicitly select that renderer preference, and since the default uses the native QWidget path, this isn't a blocking issue for WebAssembly support. I'll flag it as a potential risk for users who do opt into the OpenGL renderer on TechDraw pages, but no immediate fix is required.

Now I'm checking the module dependency chain in AppTechDraw.cpp to confirm it loads Part and Measure correctly, and then I'll verify the Gui module's load dependencies in AppTechDrawGui.cpp.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && sed -n '106,135p' src/Mod/TechDraw/Gui/AppTechDrawGui.cpp | grep -n \"loadModule\\|initModule\\|PyMOD\"", "description": "Gui module load deps"}
tool result
1:PyMOD_INIT_FUNC(TechDrawGui)
5:        PyMOD_Return(nullptr);
9:        Base::Interpreter().loadModule("TechDraw");
13:        PyMOD_Return(nullptr);
15:    PyObject* mod = TechDrawGui::initModule();
zshexit:1: parameter HISTDB_FD does not contain a file descriptor
Fable
thinking
TechDraw's dependencies are all in place. I'm checking whether there's an unused `waitingForAlign` variable or alignment path issue in DrawComplexSection where `onSectionCutFinished` depends on `prepareShape` ordering—the current approach preserves the existing behavior. I'm also tracing through `makeSectionCut` to see where `prepareShape()` gets called after `makeAlignedPieces` runs.

The alignment result feeds directly into `prepareShape`, which scales the aligned shape. The original async code had `makeAlignedPieces` running concurrently with the base cut logic—a genuine race condition. By serializing it (align first, then base cut), I get the correct deterministic order. Now I'm ready to  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"FREECAD_WASM_PY_MODULES\\|FREECAD_WASM_PY_GUI_MODULES\\|BUILD_MEASURE\\|BUILD_SURFACE\\|FREECAD_WASM_EXTRA\" src/Main/CMakeLists.txt | head -40", "description": "Conf…
tool result
11:    set(FREECAD_WASM_PY_MODULES "")
12:    set(FREECAD_WASM_PY_GUI_MODULES "")
14:        list(APPEND FREECAD_WASM_PY_MODULES Part)
15:        list(APPEND FREECAD_WASM_PY_GUI_MODULES PartGui)
18:        list(APPEND FREECAD_WASM_PY_MODULES Sketcher)
19:        list(APPEND FREECAD_WASM_PY_GUI_MODULES SketcherGui)
22:        list(APPEND FREECAD_WASM_PY_MODULES PartDesign)
23:        list(APPEND FREECAD_WASM_PY_GUI_MODULES PartDesignGui)
26:        list(APPEND FREECAD_WASM_PY_MODULES Spreadsheet)  …[truncated]
Fable
thinking
I'm noticing a discrepancy between how PartDesign is registered in the module list versus what the MEMORY note indicates about the inittab naming convention. The list uses `PartDesign` but there's a question about whether it transforms to `_PartDesign` in inittab, though for TechDraw the target name matches the PyInit function name directly.

Looking at the pattern used for Part and Measure modules, TechDraw should follow the same straightforward approach where the registered name, target name, and PyInit function all align. I'm building a CMake block that mirrors the BUILD_MEASURE structure, appending both TechDraw and TechDrawGui to their respective module lists.

Writing test probe...
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -n \"def \\|func_name\\|Name:\" src/Mod/TechDraw/App/DrawViewPart.pyi | head -30; echo \"===default template names===\"; ls src/Mod/TechDraw/Templates/*.svg | head", "desc…
tool result
24:    def getVisibleEdges(self) -> Any:
31:    def getVisibleVertexes(self) -> Any:
38:    def getHiddenEdges(self) -> Any:
45:    def getHiddenVertexes(self) -> Any:
52:    def makeCosmeticVertex(self) -> Any:
56:    def makeCosmeticVertex3d(self) -> Any:
60:    def getCosmeticVertex(self) -> Any:
64:    def getCosmeticVertexBySelection(self) -> Any:
68:    def removeCosmeticVertex(self) -> Any:
72:    def clearCosmeticVertices(self) -> Any:
76:    def makeCosmeticLine(self) -> Any:
80:    def  …[truncated]
Fable
thinking
I've confirmed that `getVisibleEdges()` is available and can be used to verify the probe detects visible edges on a projected box, which exercises the complete synchronous HLR pipeline. Now I'm ready to compose the StructuredOutput with the TechDraw module configuration, setting the build tier and flags.

I'm specifying the CMakeListBlock with the BUILD_TECHDRAW conditional, mapping the Python source trees for both the module and its resource icons, and documenting the four files that needed edits across the drawing view classes. The module depends on Part, PartDesign, Spreadsheet, Measure, and Import, with no additional link libraries needed since Qt dependencies are already handled.
Fable
All patches applied and analysis complete. Let me verify my edits compile-cleanly against the header member usage one final time (the now-unused watcher members remain declared, which is fine).
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && git diff --stat 2>/dev/null | tail -8", "description": "Summary of edited files"}
tool result
 src/Mod/OpenSCAD/OpenSCADUtils.py                  |  13 ++
 src/Mod/Points/App/Points.cpp                      |   7 +-
 src/Mod/Points/App/Properties.cpp                  |   3 +-
 src/Mod/TechDraw/App/DrawComplexSection.cpp        |  17 +--
 src/Mod/TechDraw/App/DrawViewDetail.cpp            |  33 ++---
 src/Mod/TechDraw/App/DrawViewPart.cpp              |  51 ++-----
 src/Mod/TechDraw/App/DrawViewSection.cpp           |  28 ++--
 18 files changed, 296 insertions(+), 116 deletions(-)
zshexit  …[truncated]
Fable
thinking
My TechDraw edits are complete across all four files, so I'm ready to generate the structured output now.
Fable
My TechDraw slice is complete. All 5 QtConcurrent HLR/cut/detail/align offloads serialized across 4 files, registration + packaging determined, Qt Svg/PrintSupport/Xml deps confirmed already linked.
Fable
⚙ StructuredOutput {"module": "TechDraw", "tier": "T3", "buildFlags": [{"name": "BUILD_TECHDRAW", "value": "ON"}], "mainCMakeListBlock": " if(BUILD_TECHDRAW)\n list(APPEND FREECAD_WASM_PY_MODULES TechDraw)\n list(APPEND FREECAD_WASM_PY_GUI_MO…
tool result
Structured output provided successfully