示例#1
0
        /// <summary>
        /// 它将当前SVG文档保存到一个文件中。
        /// </summary>
        public bool SaveToFile(string sFilename)
        {
            SVGErr err = new SVGErr("SvgDoc", "SaveToFile");

            err.LogParameter("sFilename", sFilename);

            bool         bResult = false;
            StreamWriter sw      = null;

            try
            {
                sw      = File.CreateText(sFilename);
                bResult = true;
            }
            catch (UnauthorizedAccessException uae)
            {
                err.LogException(uae);
            }
            catch (DirectoryNotFoundException dnfe)
            {
                err.LogException(dnfe);
            }
            catch (ArgumentException ae)
            {
                err.LogException(ae);
            }
            catch
            {
                err.LogUnhandledException();
            }

            if (!bResult)
            {
                err.LogEnd(false);

                return(false);
            }

            try
            {
                sw.Write(GetXML());
                sw.Close();
            }
            catch
            {
                err.LogUnhandledException();
                err.LogEnd(false);

                return(false);
            }

            err.LogEnd(true);

            return(true);
        }
示例#2
0
        private bool DeleteElement(SVGUnit ele, bool bDeleteFromParent)
        {
            SVGErr err = new SVGErr("SvgDoc", "DeleteElement");

            if (ele == null)
            {
                err.LogEnd(false);

                return(false);
            }

            SVGUnit parent = ele.getParent();

            if (parent == null)
            {
                err.Log("root node cannot be delete!", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            if (ele.getPrevious() != null)
            {
                ele.getPrevious().setNext(ele.getNext());
            }

            if (ele.getNext() != null)
            {
                ele.getNext().setPrevious(ele.getPrevious());
            }

            if (bDeleteFromParent)
            {
                if (IsFirstChild(ele))
                {
                    ele.getParent().setChild(ele.getNext());
                }
            }

            SVGUnit child = ele.getChild();

            while (child != null)
            {
                DeleteElement(child, false);
                child = child.getNext();
            }

            m_elements.Remove(ele.getInternalId());

            err.Log(ele.ElementInfo(), SVGErr._LogPriority.Info);
            err.LogEnd(true);

            return(true);
        }
示例#3
0
        /// <summary>
        /// 它将元素在树层次结构中向上移动一级。
        /// </summary>
        public bool ElementLevelUp(SVGUnit ele)
        {
            SVGErr err = new SVGErr("SvgDoc", "ElementLevelUp");

            err.Log("Element to move " + ele.ElementInfo(), SVGErr._LogPriority.Info);

            SVGUnit parent = ele.getParent();

            if (parent == null)
            {
                err.Log("Root node cannot be moved", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            if (parent.getParent() == null)
            {
                err.Log("An element cannot be moved up to the root", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            SVGUnit nxt = ele.getNext();

            // the first child of the parent became the next
            parent.setChild(nxt);

            if (nxt != null)
            {
                nxt.setPrevious(null);
            }

            // get the last sibling of the parent
            SVGUnit last = GetLastSibling(parent);

            if (last != null)
            {
                last.setNext(ele);
            }

            ele.setParent(parent.getParent());
            ele.setPrevious(last);
            ele.setNext(null);

            return(true);
        }
示例#4
0
        /// <summary>
        /// 它将新元素eletoadd添加为给定父元素的最后一个子元素。
        /// </summary>
        public void AddElement(SVGUnit parent, SVGUnit eleToAdd, ref SVGUnit last)
        {
            SVGErr err = new SVGErr("SvgDoc", "AddElement");

            if (eleToAdd == null || m_root == null)
            {
                err.LogEnd(false);
                return;
            }

            SVGUnit parentToAdd = m_root;

            if (parent != null)
            {
                parentToAdd = parent;
            }

            eleToAdd.setInternalId(m_nNextId++);
            m_elements.Add(eleToAdd.getInternalId(), eleToAdd);

            eleToAdd.setParent(parentToAdd);
            if (parentToAdd.getChild() == null)
            {
                // 元素是第一个子元素
                parentToAdd.setChild(eleToAdd);
                last = eleToAdd;
            }
            else
            {
                // 将元素添加为最后一个同级
                //SvgElement last = GetLastSibling(parentToAdd.getChild());

                if (last != null)
                {
                    last.setNext(eleToAdd);
                    eleToAdd.setPrevious(last);
                    last = eleToAdd;
                }
                else
                {
                    last = parentToAdd.getChild();
                }
            }

            err.Log(eleToAdd.ElementInfo(), SVGErr._LogPriority.Info);
            err.LogEnd(true);
        }
示例#5
0
        public bool LoadFromFile(string sFilename)
        {
            SVGErr err     = new SVGErr("SvgDoc", "LoadFromFile");
            bool   bResult = true;

            try
            {
                XmlTextReader reader;
                reader = new XmlTextReader(sFilename);
                if (!LoadFromFile(reader))
                {
                    MessageBox.Show("Error reading Svg document", "SvgPaint");
                }
            }
            catch (Exception e)
            {
                err.LogException(e);
                bResult = false;
            }

            return(bResult);
        }
示例#6
0
        /// <summary>
        /// 它将元素移动到当前的上一个同级之前。
        /// </summary>
        public bool ElementPositionUp(SVGUnit ele)
        {
            SVGErr err = new SVGErr("SvgDoc", "ElementPositionUp");

            err.Log("Element to move " + ele.ElementInfo(), SVGErr._LogPriority.Info);

            SVGUnit parent = ele.getParent();

            if (parent == null)
            {
                err.Log("Root node cannot be moved", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            if (IsFirstChild(ele))
            {
                err.Log("Element is already at the first position", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            SVGUnit nxt  = ele.getNext();
            SVGUnit prv  = ele.getPrevious();
            SVGUnit prv2 = null;

            ele.setNext(null);
            ele.setPrevious(null);

            if (nxt != null)
            {
                nxt.setPrevious(prv);
            }

            if (prv != null)
            {
                prv.setNext(nxt);
                prv2 = prv.getPrevious();
                prv.setPrevious(ele);

                if (IsFirstChild(prv))
                {
                    if (prv.getParent() != null)
                    {
                        prv.getParent().setChild(ele);
                    }
                }
            }

            if (prv2 != null)
            {
                prv2.setNext(ele);
            }

            ele.setNext(prv);
            ele.setPrevious(prv2);

            err.Log("Element moved " + ele.ElementInfo(), SVGErr._LogPriority.Info);
            err.LogEnd(true);

            return(true);
        }
示例#7
0
        /// <summary>
        /// 它创建一个从文件读取的SVG文档。
        /// 如果当前文档存在,则会将其销毁。
        /// </summary>
        public bool LoadFromFile(XmlReader reader)
        {
            SVGErr err = new SVGErr("SvgDoc", "LoadFromFile");

            err.LogParameter("sFilename", reader.BaseURI);

            if (m_root != null)
            {
                m_root    = null;
                m_nNextId = 1;
                m_elements.Clear();
            }

            bool bResult = true;

            try
            {
                string  tmp;
                SVGUnit eleParent = null;
                SVGUnit eleLast   = null;

                try
                {
                    // 分析文件并显示每个节点。
                    while (reader.Read() && bResult)
                    {
                        switch (reader.NodeType)
                        {
                        case XmlNodeType.Attribute:
                            tmp = reader.Name;
                            tmp = reader.Value;
                            break;

                        case XmlNodeType.Element:    //找到一个标签
                        {
                            SVGUnit ele = AddElement(eleParent, reader.Name, ref eleLast);

                            if (ele == null)
                            {
                                err.Log("Svg element cannot be added. Name: " + reader.Name,
                                        SVGErr._LogPriority.Warning);
                                bResult = false;
                            }
                            else
                            {
                                eleParent = ele;

                                if (reader.IsEmptyElement)
                                {
                                    if (eleParent != null)
                                    {
                                        eleParent = eleParent.getParent();
                                    }
                                }

                                bool bLoop = reader.MoveToFirstAttribute();
                                while (bLoop)    //直到读完属性为止
                                {
                                    if (!ele.SetAttributeValue(reader.Name, reader.Value))
                                    {
                                        err.Log("Read AttributeValue : " + reader.Value, SVGErr._LogPriority.Warning);
                                    }

                                    bLoop = reader.MoveToNextAttribute();
                                }
                            }
                        }
                        break;

                        case XmlNodeType.Text:
                            if (eleParent != null)
                            {
                                eleParent.setElementValue(reader.Value);
                            }

                            break;

                        case XmlNodeType.CDATA:

                            err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
                            break;

                        case XmlNodeType.ProcessingInstruction:

                            err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
                            break;

                        case XmlNodeType.Comment:

                            err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
                            break;

                        case XmlNodeType.XmlDeclaration:
                            m_sXmlDeclaration = "<?xml " + reader.Value + "?>";
                            break;

                        case XmlNodeType.Document:
                            err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
                            break;

                        case XmlNodeType.DocumentType:
                        {
                            string sDTD1;
                            string sDTD2;

                            sDTD1 = reader.GetAttribute("PUBLIC");
                            sDTD2 = reader.GetAttribute("SYSTEM");

                            m_sXmlDocType = "<!DOCTYPE svg PUBLIC \"" + sDTD1 + "\" \"" + sDTD2 + "\">";
                        }
                        break;

                        case XmlNodeType.EntityReference:
                            err.Log("Unexpected item: " + reader.Value, SVGErr._LogPriority.Warning);
                            break;

                        case XmlNodeType.EndElement:
                            if (eleParent != null)
                            {
                                eleParent = eleParent.getParent();
                                eleLast   = null;
                                if (eleParent != null)
                                {
                                    var templast = eleParent.getChild();
                                    while (templast != null)
                                    {
                                        eleLast  = templast;
                                        templast = templast.getNext();
                                    }
                                }
                            }

                            break;
                        } // switch
                    }     // while
                }         // read try
                catch (XmlException xmle)
                {
                    err.LogException(xmle);
                    err.LogParameter("Line Number", xmle.LineNumber.ToString());
                    err.LogParameter("Line Position", xmle.LinePosition.ToString());

                    bResult = false;
                }
                catch (Exception e)
                {
                    err.LogException(e);
                    bResult = false;
                }
                finally
                {
                    reader.Close();
                }
            }
            catch
            {
                err.LogUnhandledException();
                bResult = false;
            }

            err.LogEnd(bResult);

            return(bResult);
        }
示例#8
0
        /// <summary>
        /// It moves the element after its current next sibling.
        /// </summary>
        public bool ElementPositionDown(SVGUnit ele)
        {
            SVGErr err = new SVGErr("SvgDoc", "ElementPositionDown");

            err.Log("Element to move " + ele.ElementInfo(), SVGErr._LogPriority.Info);

            SVGUnit parent = ele.getParent();

            if (parent == null)
            {
                err.Log("Root node cannot be moved", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            if (IsLastSibling(ele))
            {
                err.Log("Element is already at the last sibling position", SVGErr._LogPriority.Info);
                err.LogEnd(false);

                return(false);
            }

            SVGUnit nxt  = ele.getNext();
            SVGUnit nxt2 = null;
            SVGUnit prv  = ele.getPrevious();

            // fix Next
            if (nxt != null)
            {
                nxt.setPrevious(ele.getPrevious());
                nxt2 = nxt.getNext();
                nxt.setNext(ele);
            }

            // fix Previous
            if (prv != null)
            {
                prv.setNext(nxt);
            }

            // fix Element
            if (IsFirstChild(ele))
            {
                parent.setChild(nxt);
            }

            ele.setPrevious(nxt);
            ele.setNext(nxt2);

            if (nxt2 != null)
            {
                nxt2.setPrevious(ele);
            }

            err.Log("Element moved " + ele.ElementInfo(), SVGErr._LogPriority.Info);
            err.LogEnd(true);

            return(true);
        }