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Itext.xml
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<chapter id="itext">
<title>iText PDF generation</title>
<para>Seam now includes a component set for generating documents using iText. The primary focus of Seam's iText
document support is for the generation of PDF documents, but Seam also offers basic support for RTF document
generation.</para>
<section id="itext.intro">
<title>Using PDF Support</title>
<para>iText support is provided by <literal>jboss-seam-pdf.jar</literal>. This JAR contains the iText JSF
controls, which are used to construct views that can render to PDF, and the DocumentStore component, which
serves the rendered documents to the user. To include PDF support in your application, put
<literal>jboss-seam-pdf.jar</literal> in your <literal>WEB-INF/lib</literal> directory along with the
iText JAR file. There is no further configuration needed to use Seam's iText support. </para>
<para> The Seam iText module requires the use of Facelets as the view technology. Future versions of the library
may also support the use of JSP. Additionally, it requires the use of the seam-ui package.</para>
<para> The <literal>examples/itext</literal> project contains an example of the PDF support in action. It
demonstrates proper deployment packaging, and it contains a number examples that demonstrate the key PDF
generation features current supported. </para>
<section id="itext.document">
<title>Creating a document</title>
<informaltable>
<tgroup cols="2">
<colspec colnum="1" colwidth="1*"/>
<colspec colnum="2" colwidth="3*"/>
<tbody>
<row>
<entry valign="top">
<para>
<literal><p:document></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para> Documents are generated by facelet XHTML files using tags in the
<literal>http://jboss.org/schema/seam/pdf</literal> namespace. Documents
should always have the <literal>document</literal> tag at the root of the document.
The <literal>document</literal> tag prepares Seam to generate a document into the
DocumentStore and renders an HTML redirect to that stored content.</para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para>
<literal>type</literal> — The type of the document to be produced.
Valid values are <literal>PDF</literal>, <literal>RTF</literal> and
<literal>HTML</literal> modes. Seam defaults to PDF generation, and many
of the features only work correctly when generating PDF documents.</para>
</listitem>
<listitem>
<para>
<literal>pageSize</literal> — The size of the page to be generate.
The most commonly used values would be <literal>LETTER</literal> and
<literal>A4</literal>. A full list of supported pages sizes can be found
in <literal>com.lowagie.text.PageSize</literal> class. Alternatively,
pageSize can provide the width and height of the page directly. The value
"612 792", for example, is equivalent to the LETTER page size. </para>
</listitem>
<listitem>
<para>
<literal>orientation</literal> — The orientation of the page.
Valid values are <literal>portrait</literal> and
<literal>landscape</literal>. In landscape mode, the height and width page
size values are reversed. </para>
</listitem>
<listitem>
<para>
<literal>margins</literal> — The left, right, top and bottom
margin values. </para>
</listitem>
<listitem>
<para>
<literal>marginMirroring</literal> — Indicates that margin
settings should be reversed an alternating pages.</para>
</listitem>
<listitem>
<para>
<literal>disposition</literal> — When generating PDFs in a web browser, this determines the HTTP
<literal>Content-Disposition</literal> of the document. Valid values are <literal>inline</literal>, which
indicates the document should be displayed in the browser window if possible,
and <literal>attachment</literal>, which indicates that the document should be treated as a download.
The default value is <literal>inline</literal>.</para>
</listitem>
<listitem>
<para>
<literal>fileName</literal> — For attachments, this value
overrides the downloaded file name.
</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Metadata Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para>
<literal>title</literal>
</para>
</listitem>
<listitem>
<para>
<literal>subject</literal>
</para>
</listitem>
<listitem>
<para>
<literal>keywords</literal>
</para>
</listitem>
<listitem>
<para>
<literal>author</literal>
</para>
</listitem>
<listitem>
<para>
<literal>creator</literal>
</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:document xmlns:p="http://jboss.org/schema/seam/pdf">
The document goes here.
</p:document>]]></programlisting>
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
<section id="itext.text">
<title>Basic Text Elements</title>
<para> Useful documents will need to contain more than just text; however, the standard UI components are
geared towards HTML generation and are not useful for generating PDF content. Instead, Seam provides a
special UI components for generating suitable PDF content. Tags like
<literal><p:image></literal> and <literal><p:paragraph></literal> are the
basic foundations of simple documents. Tags like <literal><p:font></literal> provide style
information to all the content surrounding them. </para>
<informaltable>
<tgroup cols="2">
<colspec colnum="1" colwidth="1*"/>
<colspec colnum="2" colwidth="3*"/>
<tbody>
<row>
<entry valign="top">
<para>
<literal><p:paragraph></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para> Most uses of text should be sectioned into paragraphs so that text fragments can
be flowed, formatted and styled in logical groups.</para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para>
<literal>firstLineIndent</literal>
</para>
</listitem>
<listitem>
<para>
<literal>extraParagraphSpace</literal>
</para>
</listitem>
<listitem>
<para>
<literal>leading</literal>
</para>
</listitem>
<listitem>
<para>
<literal>multipliedLeading</literal>
</para>
</listitem>
<listitem>
<para>
<literal>spacingBefore</literal> — The blank space to be inserted
before the element. </para>
</listitem>
<listitem>
<para>
<literal>spacingAfter</literal> — The blank space to be inserted
after the element.</para>
</listitem>
<listitem>
<para>
<literal>indentationLeft</literal>
</para>
</listitem>
<listitem>
<para>
<literal>indentationRight</literal>
</para>
</listitem>
<listitem>
<para>
<literal>keepTogether</literal>
</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:paragraph alignment="justify">
This is a simple document. It isn't very fancy.
</p:paragraph>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:text></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para> The <literal>text</literal> tag allows text fragments to be produced from
application data using normal JSF converter mechanisms. It is very similar to the
<literal>outputText</literal> tag used when rendering HTML documents. </para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>value</literal> — The value to be displayed. This will
typically be a value binding expression.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:paragraph>
The item costs <p:text value="#{product.price}">
<f:convertNumber type="currency" currencySymbol="$"/>
</p:text>
</p:paragraph>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:html></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para> The <literal>html</literal> tag renders HTML content into the PDF.
</para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>value</literal> — The text to be displayed.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[
<p:html value="This is HTML with <b>some markup</b>." />
<p:html>
<h1>This is more complex HTML</h1>
<ul>
<li>one</li>
<li>two</li>
<li>three</li>
</ul>
</p:html>
<p:html>
<s:formattedText value="*This* is |Seam Text| as HTML. It's very^cool^." />
</p:html>
]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:font></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para> The font tag defines the default font to be used for all text inside of it. </para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>name</literal> — The font name, for example:
<literal>COURIER</literal>, <literal>HELVETICA</literal>,
<literal>TIMES-ROMAN</literal>, <literal>SYMBOL</literal> or
<literal>ZAPFDINGBATS</literal>.</para>
</listitem>
<listitem>
<para><literal>size</literal> — The point size of the font.</para>
</listitem>
<listitem>
<para><literal>style</literal> — The font styles. Any combination of :
<literal>NORMAL</literal>, <literal>BOLD</literal>,
<literal>ITALIC</literal>, <literal>OBLIQUE</literal>,
<literal>UNDERLINE</literal>, <literal>LINE-THROUGH</literal></para>
</listitem>
<listitem>
<para><literal>color</literal> — The font color. (see <xref linkend="itext.colors"/> for color values)</para>
</listitem>
<listitem>
<para><literal>encoding</literal> — The character set encoding.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:font name="courier" style="bold" size="24">
<p:paragraph>My Title</p:paragraph>
</p:font>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:textcolumn></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para><literal>p:textcolumn</literal> inserts a text column that can
be used to control the flow of text. The most common case is to
support right to left direction fonts.</para>
<para>
<emphasis>Attributes</emphasis>
<itemizedlist>
<listitem>
<para><literal>left</literal> — The left bounds of
the text column</para>
</listitem>
<listitem>
<para><literal>right</literal> — The right bounds
of the text column</para>
</listitem>
<listitem>
<para><literal>direction</literal> — The run direction
of the text in the column: <literal>RTL</literal>,
<literal>LTR</literal>, <literal
>NO-BIDI</literal>, <literal>DEFAULT</literal>
</para>
</listitem>
</itemizedlist>
</para>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[
<p:textcolumn left="400" right="600" direction="rtl">
<p:font name="/Library/Fonts/Arial Unicode.ttf"
encoding="Identity-H"
embedded="true">#{phrases.arabic}</p:font>
</p:textcolumn>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:newPage></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para><literal>p:newPage</literal> inserts a page break. </para>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:newPage />]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:image></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para><literal>p:image</literal> inserts an image into the document. Images can be
loaded from the classpath or from the web application context using the
<literal>value</literal> attribute. </para>
<para>Resources can also be dynamically generated by application code. The
<literal>imageData</literal> attribute can specify a value binding expression
whose value is a <literal>java.awt.Image</literal> object. </para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>value</literal> — A resource name or a method
expression binding to an application-generated image. </para>
</listitem>
<listitem>
<para><literal>rotation</literal> — The rotation of the image in
degrees. </para>
</listitem>
<listitem>
<para><literal>height</literal> — The height of the image. </para>
</listitem>
<listitem>
<para><literal>width</literal> — The width of the image. </para>
</listitem>
<listitem>
<para>
<literal>alignment</literal>— The alignment of the image. (see
<xref linkend="itext.alignment"/> for possible values) </para>
</listitem>
<listitem>
<para>
<literal>alt</literal> — Alternative text representation for the
image.</para>
</listitem>
<listitem>
<para>
<literal>indentationLeft</literal>
</para>
</listitem>
<listitem>
<para>
<literal>indentationRight</literal>
</para>
</listitem>
<listitem>
<para>
<literal>spacingBefore</literal> — The blank space to be inserted
before the element.</para>
</listitem>
<listitem>
<para>
<literal>spacingAfter</literal> — The blank space to be inserted
after the element.</para>
</listitem>
<listitem>
<para>
<literal>widthPercentage</literal>
</para>
</listitem>
<listitem>
<para>
<literal>initialRotation</literal>
</para>
</listitem>
<listitem>
<para>
<literal>dpi</literal>
</para>
</listitem>
<listitem>
<para>
<literal>scalePercent</literal> — The scaling factor (as a
percentage) to use for the image. This can be expressed as a single
percentage value or as two percentage values representing separate x and y
scaling percentages.</para>
</listitem>
<listitem>
<para>
<literal>scaleToFit</literal> — Specifies the X any Y
size to scale the image to. The image will be scale to fit those dimensions
as closely as possible while preserving the XY ratio of the image.</para>
</listitem>
<listitem>
<para>
<literal>wrap</literal>
</para>
</listitem>
<listitem>
<para>
<literal>underlying</literal>
</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:image value="/jboss.jpg" />]]></programlisting>
<programlisting role="XHTML"><![CDATA[<p:image value="#{images.chart}" />]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:anchor></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para><literal>p:anchor</literal> defines clickable links from a document. It supports
the following attributes:</para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>name</literal> — The name of an in-document anchor
destination.</para>
</listitem>
<listitem>
<para><literal>reference</literal> — The destination the link refers
to. Links to other points in the document should begin with a "#". For
example, "#link1" to refer to an anchor position with a
<literal>name</literal> of <literal>link1</literal>. Links may also be a
full URL to point to a resource outside of the document.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:listItem><p:anchor reference="#reason1">Reason 1</p:anchor></p:listItem>
...
<p:paragraph>
<p:anchor name="reason1">It's the quickest way to get "rich"</p:anchor>
...
</p:paragraph>]]></programlisting>
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
<section id="itext.header">
<title>Headers and Footers</title>
<informaltable>
<tgroup cols="2">
<colspec colnum="1" colwidth="1*"/>
<colspec colnum="2" colwidth="3*"/>
<tbody>
<row>
<entry valign="top">
<para>
<literal><p:header></literal>
</para>
<para>
<literal><p:footer></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para>The <literal>p:header</literal> and <literal>p:footer</literal> components provide
the ability to place header and footer text on each page of a generated document. Header and footer declarations should appear at the beginning of a document. </para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para>
<literal>alignment</literal> — The alignment of the header/footer
box section. (see <xref linkend="itext.alignment"/> for alignment values)</para>
</listitem>
<listitem>
<para><literal>backgroundColor</literal> — The background color of the
header/footer box. (see <xref linkend="itext.colors"/> for color values)
</para>
</listitem>
<listitem>
<para><literal>borderColor</literal> — The border color of the
header/footer box. Individual border sides can be set using
<literal>borderColorLeft</literal>, <literal>borderColorRight</literal>,
<literal>borderColorTop</literal> and
<literal>borderColorBottom</literal>.(see <xref linkend="itext.colors"/> for
color values) </para>
</listitem>
<listitem>
<para>
<literal>borderWidth</literal> — The width of the border.
Individual border sides can be specified using
<literal>borderWidthLeft</literal>, <literal>borderWidthRight</literal>,
<literal>borderWidthTop</literal> and
<literal>borderWidthBottom</literal>.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<f:facet name="header">
<p:font size="12">
<p:footer borderWidthTop="1" borderColorTop="blue"
borderWidthBottom="0" alignment="center">
Why Seam? [<p:pageNumber />]
</p:footer>
</p:font>
</f:facet>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:pageNumber></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para>The current page number can be placed inside of a header or footer using the
<literal>p:pageNumber</literal> tag. The page number tag can only be used in the
context of a header or footer and can only be used once.</para>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><p:footer borderWidthTop="1" borderColorTop="blue"
borderWidthBottom="0" alignment="center">
Why Seam? [<p:pageNumber />]
</p:footer></programlisting>
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
<section id="itext.chapters">
<title>Chapters and Sections</title>
<informaltable>
<tgroup cols="2">
<colspec colnum="1" colwidth="1*"/>
<colspec colnum="2" colwidth="3*"/>
<tbody>
<row>
<entry valign="top">
<para>
<literal><p:chapter></literal>
</para>
<para>
<literal><p:section></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para>If the generated document follows a book/article structure, the
<literal>p:chapter</literal> and <literal>p:section</literal> tags can be used to
provide the necessary structure. Sections can only be used inside of chapters, but
they may be nested arbitrarily deep. Most PDF viewers provide easy navigation
between chapters and sections in a document. </para>
<note>
<para>You cannot include a chapter into another chapter, this can be done only with section(s).</para>
</note>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para>
<literal>alignment</literal> — The alignment of the header/footer
box section. (see <xref linkend="itext.alignment"/> for alignment values)</para>
</listitem>
<listitem>
<para><literal>number</literal> — The chapter/section number. Every chapter/section
should be assigned a number.</para>
</listitem>
<listitem>
<para><literal>numberDepth</literal> — The depth of numbering for
chapter/section. All sections are numbered relative to their surrounding
chapter/sections. The fourth section of the first section of chapter
three would be section 3.1.4, if displayed at the default number depth of
three. To omit the chapter number, a number depth of 2 should be used. In
that case, the section number would be displayed as 1.4.</para>
<note>
<para>Chapter(s) can have a number or without it by setting numberDepth to 0.</para>
</note>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:document xmlns:p="http://jboss.org/schema/seam/pdf"
title="Hello">
<p:chapter number="1">
<p:title><p:paragraph>Hello</p:paragraph></p:title>
<p:paragraph>Hello #{user.name}!</p:paragraph>
</p:chapter>
<p:chapter number="2">
<p:title><p:paragraph>Goodbye</p:paragraph></p:title>
<p:paragraph>Goodbye #{user.name}.</p:paragraph>
</p:chapter>
</p:document> ]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:header></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para>Any chapter or section can contain a <literal>p:title</literal>. The title will be
displayed next to the chapter/section number. The body of the title may contain raw
text or may be a <literal>p:paragraph</literal>. </para>
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</section>
<section id="itext.list">
<title>Lists</title>
<para>List structures can be displayed using the <literal>p:list</literal> and <literal>p:listItem</literal>
tags. Lists may contain arbitrarily-nested sublists. List items may not be used outside of a list. The
following document uses the <literal>ui:repeat</literal> tag to display a list of values retrieved
from a Seam component. </para>
<programlisting role="XHTML"><![CDATA[<p:document xmlns:p="http://jboss.org/schema/seam/pdf"
xmlns:ui="http://java.sun.com/jsf/facelets"
title="Hello">
<p:list style="numbered">
<ui:repeat value="#{documents}" var="doc">
<p:listItem>#{doc.name}</p:listItem>
</ui:repeat>
</p:list>
</p:document>]]></programlisting>
<informaltable>
<tgroup cols="2">
<colspec colnum="1" colwidth="1*"/>
<colspec colnum="2" colwidth="3*"/>
<tbody>
<row>
<entry valign="top">
<para>
<literal><p:list></literal>
</para>
</entry>
<entry valign="top">
<!--
<para>
<emphasis>Description</emphasis>
</para>
<para>...</para>
-->
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>style</literal> — The ordering/bulleting style of list.
One of: <literal>NUMBERED</literal>, <literal>LETTERED</literal>,
<literal>GREEK</literal>, <literal>ROMAN</literal>,
<literal>ZAPFDINGBATS</literal>, <literal>ZAPFDINGBATS_NUMBER</literal>.
If no style is given, the list items are bulleted.</para>
</listitem>
<listitem>
<para><literal>listSymbol</literal> — For bulleted lists, specifies
the bullet symbol. </para>
</listitem>
<listitem>
<para><literal>indent</literal> — The indentation level of the
list.</para>
</listitem>
<listitem>
<para><literal>lowerCase</literal> — For list styles using letters,
indicates whether the letters should be lower case.</para>
</listitem>
<listitem>
<para><literal>charNumber</literal> — For ZAPFDINGBATS, indicates the
character code of the bullet character.</para>
</listitem>
<listitem>
<para><literal>numberType</literal> — For ZAPFDINGBATS_NUMBER,
indicates the numbering style.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>
</para>
<programlisting role="XHTML"><![CDATA[<p:list style="numbered">
<ui:repeat value="#{documents}" var="doc">
<p:listItem>#{doc.name}</p:listItem>
</ui:repeat>
</p:list>]]></programlisting>
</entry>
</row>
<row>
<entry valign="top">
<para>
<literal><p:listItem></literal>
</para>
</entry>
<entry valign="top">
<para>
<emphasis>Description</emphasis>
</para>
<para><literal>p:listItem</literal> supports the following attributes:</para>
<para>
<emphasis>Attributes</emphasis>
</para>
<itemizedlist>
<listitem>
<para><literal>alignment</literal> — The alignment of the list item.
(See <xref linkend="itext.alignment"/> for possible values)</para>
</listitem>
<listitem>
<para><literal>indentationLeft</literal> — The left indentation
amount.</para>
</listitem>
<listitem>
<para><literal>indentationRight</literal> — The right indentation
amount.</para>
</listitem>
<listitem>
<para><literal>listSymbol</literal> — Overrides the default list
symbol for this list item.</para>
</listitem>
</itemizedlist>
<para>
<emphasis>Usage</emphasis>