如何用Delphi在Openoffice文档的页眉/页脚/表格中查找文本标记并替换为图像

uses
  ComObj;

var
  OpenOffice: Variant;
  Document: Variant;
begin
  OpenOffice := CreateOleObject('com.sun.star.ServiceManager');
  Document := OpenOffice.createInstance('com.sun.star.text.TextDocument');
  Document.loadFromFile('path_to_your_document');
end;

var
  Text: Variant;
  Cursor: Variant;
  SearchDescriptor: Variant;
  ReplaceDescriptor: Variant;
begin
  Text := Document.getText();
  Cursor := Text.createTextCursor();
  
  // 在页眉中查找并替换文本标记为图像
  Cursor.gotoStartOfPage(False);
  SearchDescriptor := Text.createSearchDescriptor();
  SearchDescriptor.SearchString := '文本标记';
  if Cursor.findFirst(SearchDescriptor) then
  begin
    ReplaceDescriptor := Text.createReplaceDescriptor();
    ReplaceDescriptor.setReplaceString('path_to_your_image');
    Cursor.setString('');
    Cursor.insertGraphic(ReplaceDescriptor);
  end;
  
  // 在页脚中查找并替换文本标记为图像
  Cursor.gotoEndOfPage(True);
  if Cursor.findFirst(SearchDescriptor) then
  begin
    ReplaceDescriptor := Text.createReplaceDescriptor();
    ReplaceDescriptor.setReplaceString('path_to_your_image');
    Cursor.setString('');
    Cursor.insertGraphic(ReplaceDescriptor);
  end;
  
  // 在表格中查找并替换文本标记为图像
  // 遍历表格，查找并替换文本标记为图像
end;