visit_office_math_start method

visit_office_math_start(office_math)

Called when enumeration of a Office Math object has started.

def visit_office_math_start(self, office_math: aspose.words.math.OfficeMath):
    ...
ParameterTypeDescription
office_mathOfficeMathThe object that is being visited.

Returns

A VisitorAction value that specifies how to continue the enumeration.

Examples

Shows how to print the node structure of every office math node in a document.

def test_office_math_to_text(self):

    doc = aw.Document(MY_DIR + "DocumentVisitor-compatible features.docx")
    visitor = ExDocumentVisitor.OfficeMathStructurePrinter()

    # When we get a composite node to accept a document visitor, the visitor visits the accepting node,
    # and then traverses all the node's children in a depth-first manner.
    # The visitor can read and modify each visited node.
    doc.accept(visitor)

    print(visitor.get_text())

class OfficeMathStructurePrinter(aw.DocumentVisitor):
    """Traverses a node's non-binary tree of child nodes.
    Creates a map in the form of a string of all encountered OfficeMath nodes and their children."""

    def __init__(self):

        aw.DocumentVisitor.__init__(self)

        self.builder = io.StringIO()
        self.visitor_is_inside_office_math = False
        self.doc_traversal_depth = 0

    def get_text(self) -> str:
        """Gets the plain text of the document that was accumulated by the visitor."""

        return self.builder.getvalue()

    def visit_run(self, run: aw.Run) -> aw.VisitorAction:
        """Called when a Run node is encountered in the document."""

        if self.visitor_is_inside_office_math:
            self._indent_and_append_line("[Run] \"" + run.get_text() + "\"")

        return aw.VisitorAction.CONTINUE

    def visit_office_math_start(self, office_math: aw.OfficeMath) -> aw.VisitorAction:
        """Called when an OfficeMath node is encountered in the document."""

        self._indent_and_append_line("[OfficeMath start] Math object type: " + office_math.math_object_type)
        self.doc_traversal_depth += 1
        self.visitor_is_inside_office_math = True

        return aw.VisitorAction.CONTINUE

    def visit_office_math_end(self, office_math: aw.OfficeMath) -> aw.VisitorAction:
        """Called after all the child nodes of an OfficeMath node have been visited."""

        self.doc_traversal_depth -= 1
        self._indent_and_append_line("[OfficeMath end]")
        self.visitor_is_inside_office_math = False

        return aw.VisitorAction.CONTINUE

    def _indent_and_append_line(self, text: str):
        """Append a line to the StringBuilder and indent it depending on how deep the visitor is into the document tree."""

        for i in range(self.doc_traversal_depth):
            self.builder.write("|  ")

        self.builder.write(text + "\n")

See Also