Path.Area: added python abort() to abort lengthy operation

src/Mod/Path/App/Area.cpp

@@ -108,6 +108,8 @@ CAreaConfig::~CAreaConfig() {
 
 TYPESYSTEM_SOURCE(Path::Area, Base::BaseClass);
 
+bool Area::s_aborting;
+
 Area::Area(const AreaParams *params)
 :myHaveFace(false)
 ,myHaveSolid(false)

src/Mod/Path/App/Area.h

@@ -44,6 +44,10 @@
     str << "Path.Area: " << _msg;\
     Base::Console()._l("%s\n",str.str().c_str());\
     qApp->sendPostedEvents();\
+    if(Area::aborted()) {\
+        Area::abort(false);\
+        throw Base::AbortException("operation aborted");\
+    }\
 }while(0)
 
 #define AREA_LOG(_msg) _AREA_LOG(Log,_msg)
@@ -195,6 +199,7 @@ class PathExport Area: public Base::BaseClass {
     bool myHaveSolid;
     bool myShapeDone;
     int mySkippedShapes;
+    static bool s_aborting;
 
     /** Called internally to combine children shapes for further processing */
     void build();
@@ -432,6 +437,14 @@ class PathExport Area: public Base::BaseClass {
             const AreaParams *params=NULL, const gp_Pnt *pstart=NULL, gp_Pnt *pend=NULL,
             PARAM_ARGS_DEF(PARAM_FARG,AREA_PARAMS_PATH));
 
+    static void abort(bool aborting) {
+        s_aborting  = aborting;
+    }
+
+    static bool aborted() {
+        return s_aborting;
+    }
+
     PARAM_ENUM_DECLARE(AREA_PARAMS_PATH)
 };
 

src/Mod/Path/App/AreaPy.xml

@@ -77,6 +77,13 @@ same algorithm</UserDocu>
         <UserDocu>Get current algorithm parameters as a dictionary.</UserDocu>
       </Documentation>
     </Methode>
+    <Methode Name="abort" Keyword="true">
+      <Documentation>
+          <UserDocu>abort(aborting=True): Static method to abort any ongoing operation\n
+To ensure no stray abortion is left in the previous operaion, it is advised to manually
+clear the aborting flag by calling abort(False) before starting a new operation. </UserDocu>
+      </Documentation>
+    </Methode>
     <Attribute Name="Sections" ReadOnly="true">
         <Documentation>
             <UserDocu>List of sections in this area.</UserDocu>

src/Mod/Path/App/AreaPyImp.cpp

@@ -100,10 +100,23 @@ static const AreaDoc myDocs[] = {
     },
 };
 
-struct AreaPyDoc {
-    AreaPyDoc() {
+static PyObject * abortArea(PyObject *, PyObject *args, PyObject *kwd) {
+    static char *kwlist[] = {"aborting", NULL};
+    PyObject *pObj = Py_True;
+    if (!PyArg_ParseTupleAndKeywords(args,kwd,"|O",kwlist,&pObj))
+        return 0;
+    Area::abort(PyObject_IsTrue(pObj));
+    return Py_None;
+}
+
+struct AreaPyModifier {
+    AreaPyModifier() {
         for(PyMethodDef &method : Path::AreaPy::Methods) {
             if(!method.ml_name) continue;
+            if(std::strcmp(method.ml_name,"abort")==0) {
+                method.ml_meth = (PyCFunction)abortArea;
+                method.ml_flags |= METH_STATIC;
+            }
             for(const AreaDoc &doc : myDocs) {
                 if(std::strcmp(method.ml_name,doc.name)==0) {
                     method.ml_doc = doc.doc;
@@ -114,7 +127,7 @@ struct AreaPyDoc {
     }
 };
 
-static AreaPyDoc doc;
+static AreaPyModifier mod;
 
 namespace Part {
 extern PartExport Py::Object shape2pyshape(const TopoDS_Shape &shape);
@@ -376,6 +389,10 @@ PyObject* AreaPy::getParams(PyObject *args)
     return dict;
 }
 
+PyObject* AreaPy::abort(PyObject *, PyObject *) {
+    return 0;
+}
+
 PyObject* AreaPy::getParamsDesc(PyObject *args, PyObject *keywds)
 {
     PyObject *pcObj = Py_True;
@@ -424,5 +441,3 @@ int AreaPy::setCustomAttributes(const char* /*attr*/, PyObject* /*obj*/)
 {
     return 0; 
 }
-
-