com.aspose.words

Interface INodeChangingCallback

public interface INodeChangingCallback

Implement this interface if you want to receive notifications when nodes are inserted or removed in the document.

Examples:

Shows how customize node changing with a callback.

 
 public void fontChangeViaCallback() throws Exception {
     Document doc = new Document();
     DocumentBuilder builder = new DocumentBuilder(doc);

     // Set the node changing callback to custom implementation,
     // then add/remove nodes to get it to generate a log.
     HandleNodeChangingFontChanger callback = new HandleNodeChangingFontChanger();
     doc.setNodeChangingCallback(callback);

     builder.writeln("Hello world!");
     builder.writeln("Hello again!");
     builder.insertField(" HYPERLINK \"https://www.google.com/\" ");
     builder.insertShape(ShapeType.RECTANGLE, 300.0, 300.0);

     doc.getRange().getFields().get(0).remove();

     System.out.println(callback.getLog());
 }

 /// <summary>
 /// Logs the date and time of each node insertion and removal.
 /// Sets a custom font name/size for the text contents of Run nodes.
 /// </summary>
 public static class HandleNodeChangingFontChanger implements INodeChangingCallback {
     public void nodeInserted(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash:\t{0}", args.getNode().hashCode()));

         if (args.getNode().getNodeType() == NodeType.RUN) {
             Font font = ((Run) args.getNode()).getFont();
             mLog.append(MessageFormat.format("\tFont:\tChanged from \"{0}\" {1}pt", font.getName(), font.getSize()));

             font.setSize(24.0);
             font.setName("Arial");

             mLog.append(MessageFormat.format(" to \"{0}\" {1}pt", font.getName(), font.getSize()));
             mLog.append(MessageFormat.format("\tContents:\n\t\t\"{0}\"", args.getNode().getText()));
         }
     }

     public void nodeInserting(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode insertion:", new Date()));
     }

     public void nodeRemoved(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash code:\t{0}", args.getNode().hashCode()));
     }

     public void nodeRemoving(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode removal:", new Date()));
     }

     public String getLog() {
         return mLog.toString();
     }

     private final StringBuilder mLog = new StringBuilder();
 }
 
 

Method Summary

Modifier and Type	Method and Description
void	nodeInserted(NodeChangingArgs args) Called when a node belonging to this document has been inserted into another node.
void	nodeInserting(NodeChangingArgs args) Called just before a node belonging to this document is about to be inserted into another node.
void	nodeRemoved(NodeChangingArgs args) Called when a node belonging to this document has been removed from its parent.
void	nodeRemoving(NodeChangingArgs args) Called just before a node belonging to this document is about to be removed from the document.

Method Detail

nodeInserting

void nodeInserting(NodeChangingArgs args)
            throws java.lang.Exception

Called just before a node belonging to this document is about to be inserted into another node.

Examples:

Shows how customize node changing with a callback.

 
 public void fontChangeViaCallback() throws Exception {
     Document doc = new Document();
     DocumentBuilder builder = new DocumentBuilder(doc);

     // Set the node changing callback to custom implementation,
     // then add/remove nodes to get it to generate a log.
     HandleNodeChangingFontChanger callback = new HandleNodeChangingFontChanger();
     doc.setNodeChangingCallback(callback);

     builder.writeln("Hello world!");
     builder.writeln("Hello again!");
     builder.insertField(" HYPERLINK \"https://www.google.com/\" ");
     builder.insertShape(ShapeType.RECTANGLE, 300.0, 300.0);

     doc.getRange().getFields().get(0).remove();

     System.out.println(callback.getLog());
 }

 /// <summary>
 /// Logs the date and time of each node insertion and removal.
 /// Sets a custom font name/size for the text contents of Run nodes.
 /// </summary>
 public static class HandleNodeChangingFontChanger implements INodeChangingCallback {
     public void nodeInserted(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash:\t{0}", args.getNode().hashCode()));

         if (args.getNode().getNodeType() == NodeType.RUN) {
             Font font = ((Run) args.getNode()).getFont();
             mLog.append(MessageFormat.format("\tFont:\tChanged from \"{0}\" {1}pt", font.getName(), font.getSize()));

             font.setSize(24.0);
             font.setName("Arial");

             mLog.append(MessageFormat.format(" to \"{0}\" {1}pt", font.getName(), font.getSize()));
             mLog.append(MessageFormat.format("\tContents:\n\t\t\"{0}\"", args.getNode().getText()));
         }
     }

     public void nodeInserting(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode insertion:", new Date()));
     }

     public void nodeRemoved(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash code:\t{0}", args.getNode().hashCode()));
     }

     public void nodeRemoving(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode removal:", new Date()));
     }

     public String getLog() {
         return mLog.toString();
     }

     private final StringBuilder mLog = new StringBuilder();
 }
 
 

Throws:

java.lang.Exception

nodeInserted

void nodeInserted(NodeChangingArgs args)
           throws java.lang.Exception

Called when a node belonging to this document has been inserted into another node.

Examples:

Shows how customize node changing with a callback.

 
 public void fontChangeViaCallback() throws Exception {
     Document doc = new Document();
     DocumentBuilder builder = new DocumentBuilder(doc);

     // Set the node changing callback to custom implementation,
     // then add/remove nodes to get it to generate a log.
     HandleNodeChangingFontChanger callback = new HandleNodeChangingFontChanger();
     doc.setNodeChangingCallback(callback);

     builder.writeln("Hello world!");
     builder.writeln("Hello again!");
     builder.insertField(" HYPERLINK \"https://www.google.com/\" ");
     builder.insertShape(ShapeType.RECTANGLE, 300.0, 300.0);

     doc.getRange().getFields().get(0).remove();

     System.out.println(callback.getLog());
 }

 /// <summary>
 /// Logs the date and time of each node insertion and removal.
 /// Sets a custom font name/size for the text contents of Run nodes.
 /// </summary>
 public static class HandleNodeChangingFontChanger implements INodeChangingCallback {
     public void nodeInserted(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash:\t{0}", args.getNode().hashCode()));

         if (args.getNode().getNodeType() == NodeType.RUN) {
             Font font = ((Run) args.getNode()).getFont();
             mLog.append(MessageFormat.format("\tFont:\tChanged from \"{0}\" {1}pt", font.getName(), font.getSize()));

             font.setSize(24.0);
             font.setName("Arial");

             mLog.append(MessageFormat.format(" to \"{0}\" {1}pt", font.getName(), font.getSize()));
             mLog.append(MessageFormat.format("\tContents:\n\t\t\"{0}\"", args.getNode().getText()));
         }
     }

     public void nodeInserting(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode insertion:", new Date()));
     }

     public void nodeRemoved(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash code:\t{0}", args.getNode().hashCode()));
     }

     public void nodeRemoving(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode removal:", new Date()));
     }

     public String getLog() {
         return mLog.toString();
     }

     private final StringBuilder mLog = new StringBuilder();
 }
 
 

Throws:

java.lang.Exception

nodeRemoving

void nodeRemoving(NodeChangingArgs args)
           throws java.lang.Exception

Called just before a node belonging to this document is about to be removed from the document.

Examples:

Shows how customize node changing with a callback.

 
 public void fontChangeViaCallback() throws Exception {
     Document doc = new Document();
     DocumentBuilder builder = new DocumentBuilder(doc);

     // Set the node changing callback to custom implementation,
     // then add/remove nodes to get it to generate a log.
     HandleNodeChangingFontChanger callback = new HandleNodeChangingFontChanger();
     doc.setNodeChangingCallback(callback);

     builder.writeln("Hello world!");
     builder.writeln("Hello again!");
     builder.insertField(" HYPERLINK \"https://www.google.com/\" ");
     builder.insertShape(ShapeType.RECTANGLE, 300.0, 300.0);

     doc.getRange().getFields().get(0).remove();

     System.out.println(callback.getLog());
 }

 /// <summary>
 /// Logs the date and time of each node insertion and removal.
 /// Sets a custom font name/size for the text contents of Run nodes.
 /// </summary>
 public static class HandleNodeChangingFontChanger implements INodeChangingCallback {
     public void nodeInserted(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash:\t{0}", args.getNode().hashCode()));

         if (args.getNode().getNodeType() == NodeType.RUN) {
             Font font = ((Run) args.getNode()).getFont();
             mLog.append(MessageFormat.format("\tFont:\tChanged from \"{0}\" {1}pt", font.getName(), font.getSize()));

             font.setSize(24.0);
             font.setName("Arial");

             mLog.append(MessageFormat.format(" to \"{0}\" {1}pt", font.getName(), font.getSize()));
             mLog.append(MessageFormat.format("\tContents:\n\t\t\"{0}\"", args.getNode().getText()));
         }
     }

     public void nodeInserting(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode insertion:", new Date()));
     }

     public void nodeRemoved(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash code:\t{0}", args.getNode().hashCode()));
     }

     public void nodeRemoving(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode removal:", new Date()));
     }

     public String getLog() {
         return mLog.toString();
     }

     private final StringBuilder mLog = new StringBuilder();
 }
 
 

Throws:

java.lang.Exception

nodeRemoved

void nodeRemoved(NodeChangingArgs args)
          throws java.lang.Exception

Called when a node belonging to this document has been removed from its parent.

Examples:

Shows how customize node changing with a callback.

 
 public void fontChangeViaCallback() throws Exception {
     Document doc = new Document();
     DocumentBuilder builder = new DocumentBuilder(doc);

     // Set the node changing callback to custom implementation,
     // then add/remove nodes to get it to generate a log.
     HandleNodeChangingFontChanger callback = new HandleNodeChangingFontChanger();
     doc.setNodeChangingCallback(callback);

     builder.writeln("Hello world!");
     builder.writeln("Hello again!");
     builder.insertField(" HYPERLINK \"https://www.google.com/\" ");
     builder.insertShape(ShapeType.RECTANGLE, 300.0, 300.0);

     doc.getRange().getFields().get(0).remove();

     System.out.println(callback.getLog());
 }

 /// <summary>
 /// Logs the date and time of each node insertion and removal.
 /// Sets a custom font name/size for the text contents of Run nodes.
 /// </summary>
 public static class HandleNodeChangingFontChanger implements INodeChangingCallback {
     public void nodeInserted(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash:\t{0}", args.getNode().hashCode()));

         if (args.getNode().getNodeType() == NodeType.RUN) {
             Font font = ((Run) args.getNode()).getFont();
             mLog.append(MessageFormat.format("\tFont:\tChanged from \"{0}\" {1}pt", font.getName(), font.getSize()));

             font.setSize(24.0);
             font.setName("Arial");

             mLog.append(MessageFormat.format(" to \"{0}\" {1}pt", font.getName(), font.getSize()));
             mLog.append(MessageFormat.format("\tContents:\n\t\t\"{0}\"", args.getNode().getText()));
         }
     }

     public void nodeInserting(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode insertion:", new Date()));
     }

     public void nodeRemoved(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\tType:\t{0}", args.getNode().getNodeType()));
         mLog.append(MessageFormat.format("\tHash code:\t{0}", args.getNode().hashCode()));
     }

     public void nodeRemoving(NodeChangingArgs args) {
         mLog.append(MessageFormat.format("\n{0}\tNode removal:", new Date()));
     }

     public String getLog() {
         return mLog.toString();
     }

     private final StringBuilder mLog = new StringBuilder();
 }
 
 

Throws:

java.lang.Exception