com.itextpdf.text.pdf.parser.FilteredRenderListener Maven / Gradle / Ivy
/*
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 iText Group NV
* Authors: Kevin Day, Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf.parser;
/**
* A text render listener that filters text operations before passing them on to a delegate
* @since 5.0.1
*/
public class FilteredRenderListener implements RenderListener {
/** The delegate that will receive the text render operation if the filters all pass */
private final RenderListener delegate;
/** The filters to be applied */
private final RenderFilter[] filters;
/**
* Construction
* @param delegate the delegate {@link RenderListener} that will receive filtered text operations
* @param filters the filter(s) to apply
*/
public FilteredRenderListener(RenderListener delegate, RenderFilter... filters) {
this.delegate = delegate;
this.filters = filters;
}
/**
* Applies filters, then delegates to the delegate if all filters pass
* @param renderInfo contains info to render text
* @see com.itextpdf.text.pdf.parser.RenderListener#renderText(com.itextpdf.text.pdf.parser.TextRenderInfo)
*/
public void renderText(TextRenderInfo renderInfo) {
for (RenderFilter filter : filters) {
if (!filter.allowText(renderInfo))
return;
}
delegate.renderText(renderInfo);
}
/**
* This class delegates this call
* @see com.itextpdf.text.pdf.parser.RenderListener#beginTextBlock()
*/
public void beginTextBlock() {
delegate.beginTextBlock();
}
/**
* This class delegates this call
* @see com.itextpdf.text.pdf.parser.RenderListener#endTextBlock()
*/
public void endTextBlock() {
delegate.endTextBlock();
}
/**
* Applies filters, then delegates to the delegate if all filters pass
* @see com.itextpdf.text.pdf.parser.RenderListener#renderImage(com.itextpdf.text.pdf.parser.ImageRenderInfo)
* @since 5.0.1
*/
public void renderImage(ImageRenderInfo renderInfo) {
for (RenderFilter filter : filters) {
if (!filter.allowImage(renderInfo))
return;
}
delegate.renderImage(renderInfo);
}
}