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/*
* Copyright 2005 by Bruno Lowagie
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2005 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2005 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.pdf.events;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import com.lowagie.text.error_messages.MessageLocalization;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Rectangle;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfFormField;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfPCell;
import com.lowagie.text.pdf.PdfPCellEvent;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfRectangle;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.TextField;
/**
* Class that can be used to position AcroForm fields.
*/
public class FieldPositioningEvents extends PdfPageEventHelper implements PdfPCellEvent {
/**
* Keeps a map with fields that are to be positioned in inGenericTag.
*/
protected Map genericChunkFields = new HashMap<>();
/**
* Keeps the form field that is to be positioned in a cellLayout event.
*/
protected PdfFormField cellField = null;
/**
* The PdfWriter to use when a field has to added in a cell event.
*/
protected PdfWriter fieldWriter = null;
/**
* The PdfFormField that is the parent of the field added in a cell event.
*/
protected PdfFormField parent = null;
/** Creates a new event. This constructor will be used if you need to position fields with Chunk objects. */
public FieldPositioningEvents() {}
/** Some extra padding that will be taken into account when defining the widget. */
public float padding;
/**
* Add a PdfFormField that has to be tied to a generic Chunk.
* @param field The PdfFormField
* @param text The text
*/
public void addField(String text, PdfFormField field) {
genericChunkFields.put(text, field);
}
/** Creates a new event. This constructor will be used if you need to position fields with a Cell Event.
* @param writer The PdfWriter
* @param field The field to label the Event*/
public FieldPositioningEvents(PdfWriter writer, PdfFormField field) {
this.cellField = field;
this.fieldWriter = writer;
}
/** Creates a new event. This constructor will be used if you need to position fields with a Cell Event.
* @param parent The parent of the Event
* @param field The field to label the Event*/
public FieldPositioningEvents(PdfFormField parent, PdfFormField field) {
this.cellField = field;
this.parent = parent;
}
/** Creates a new event. This constructor will be used if you need to position fields with a Cell Event.
* @param writer The PdfWriter
* @param text The text to label the TextField
* @throws DocumentException thrown when an error occurs in a Document
* @throws IOException throw when an I/O operation fails*/
public FieldPositioningEvents(PdfWriter writer, String text) throws IOException, DocumentException {
this.fieldWriter = writer;
TextField tf = new TextField(writer, new Rectangle(0, 0), text);
tf.setFontSize(14);
cellField = tf.getTextField();
}
/** Creates a new event. This constructor will be used if you need to position fields with a Cell Event.
* @param text The label of the event
* @param parent The parent of the new event
* @param writer The PdfWriter
* @throws DocumentException thrown when an error occurs in a Document
* @throws IOException throw when an I/O operation fails*/
public FieldPositioningEvents(PdfWriter writer, PdfFormField parent, String text) throws IOException, DocumentException {
this.parent = parent;
TextField tf = new TextField(writer, new Rectangle(0, 0), text);
tf.setFontSize(14);
cellField = tf.getTextField();
}
/**
* @param padding The padding to set.
*/
public void setPadding(float padding) {
this.padding = padding;
}
/**
* @param parent The parent to set.
*/
public void setParent(PdfFormField parent) {
this.parent = parent;
}
/**
* @see com.lowagie.text.pdf.PdfPageEvent#onGenericTag(com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document, com.lowagie.text.Rectangle, java.lang.String)
*/
public void onGenericTag(PdfWriter writer, Document document,
Rectangle rect, String text) {
rect.setBottom(rect.getBottom() - 3);
PdfFormField field = genericChunkFields.get(text);
if (field == null) {
TextField tf = new TextField(writer, new Rectangle(rect.getLeft(padding), rect.getBottom(padding), rect.getRight(padding), rect.getTop(padding)), text);
tf.setFontSize(14);
try {
field = tf.getTextField();
} catch (Exception e) {
throw new ExceptionConverter(e);
}
}
else {
field.put(PdfName.RECT, new PdfRectangle(rect.getLeft(padding), rect.getBottom(padding), rect.getRight(padding), rect.getTop(padding)));
}
if (parent == null)
writer.addAnnotation(field);
else
parent.addKid(field);
}
/**
* @see com.lowagie.text.pdf.PdfPCellEvent#cellLayout(com.lowagie.text.pdf.PdfPCell, com.lowagie.text.Rectangle, com.lowagie.text.pdf.PdfContentByte[])
*/
public void cellLayout(PdfPCell cell, Rectangle rect, PdfContentByte[] canvases) {
if (cellField == null || (fieldWriter == null && parent == null)) throw new IllegalArgumentException(MessageLocalization.getComposedMessage("you.have.used.the.wrong.constructor.for.this.fieldpositioningevents.class"));
cellField.put(PdfName.RECT, new PdfRectangle(rect.getLeft(padding), rect.getBottom(padding), rect.getRight(padding), rect.getTop(padding)));
if (parent == null)
fieldWriter.addAnnotation(cellField);
else
parent.addKid(cellField);
}
}
