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You can add custom HTML content in the WebHelp Responsive output by inserting it in a well-formed XML file that will be referenced in the transformation (either from an Oxygen Publishing Template or using one of the HTML fragment parameters). This content may include references to additional JavaScript, CSS, and other types of resources, or such resources can be inserted inline within the HTML content that is inserted in the XML file.

The XML File

There are several things to consider regarding this XML file:
  • Well-Formedness - If the file is not a (or fragments are not well-formed), the transformation will fail.

    A common use case is if you want to include several script or link elements. In this case, the XML fragment has multiple root elements and to make it well-formed, you can wrap it in an html element. This element tag will be filtered out and only its children will be copied to the output documents. Similarly, you can wrap your content in head, body, html/head, or html/body elements.

  • Referencing Resources in the XML File - You can include references to local resources (such as JavaScript or CSS files) by using the built-in ${oxygen-webhelp-output-dir} macro to specify their paths relative to the output directory:
    <html>
      <script type="text/javascript" src="${oxygen-webhelp-output-dir}/js/test.js"/>
      <link rel="stylesheet" type="text/css" 
            href="${oxygen-webhelp-output-dir}/css/test.css" />
    </html>

    If you want that the path of your resource to be relative to the templates directory, you can use the ${oxygen-webhelp-template-dir} macro.

    To copy the referenced resources to the output directory, follow the procedure in: How to Copy Additional Resources to Output Directory.
  • Inline JavaScript or CSS Content:

    JavaScript:

    <script type="text/javascript">
        /* Include JavaScript code here. */
     
        function myFunction() {
          return true;
        }
    </script> 

    CSS:

    <style>
        /* Include CSS style rules here. */
    
        *{
          color:red
        } 
    </style>
    Note: If you have special characters (for example, &, <) that break the well-formedness of the XML fragment, it is important to place this content inside an XML comment:
    <script type="text/javascript">
      <!--
        /* Include JavaScript code here. */
     
        function myFunction() {
          return true;
        }
      --/>
    </script> 

Using WebHelp Macros Inside an HTML Fragment File

The XML file can use WebHelp macros, which are variables that will be expanded when the content of the HTML fragment file will be copied in the final output.

There are two possibilities for using macros:
  • Directly in attribute values - For example, if you want to reference a JavaScript file from the Publishing Template directory, you can use the following construct:
    <script type="text/javascript" src="${path(oxygen-webhelp-template-dir)}/"></script>
  • In text content - Using the <whc:macro/> template component:
    <script type="text/javascript" xmlns:whc="http://www.oxygenxml.com/webhelp/components"> 
      var outDirPath = '<whc:macro value="${path(oxygen-webhelp-output-dir)}"/>';
      console.log("The output directory path is:", outDirPath);
    </script>
The following macros are supported:
i18n
For localizing a string.
${i18n(string.id)}
param
Returns the value of a transformation parameter.
${param(webhelp.show.main.page.tiles)}
env
Returns the value of an environment variable.
${env(JAVA_HOME)}
system-property
Returns the value of a system property.
${system-property(os.name)}
timestamp
Can be used to format the current date and time. Accepts a string (as a parameter) that determines how the date and time will be formatted (format string or picture string as it is known in the XSLT specification). The format string must comply with the rules of the XSLT format-dateTime function specification.
${timestamp([h1]:[m01] [P] [M01]/[D01]/[Y0001])}
path
Returns the path associated with the specified path ID. The following paths IDs are supported:
  • oxygen-webhelp-output-dir - The path to the output directory. The path is relative to the current HTML file.
  • oxygen-webhelp-assets-dir - The path to the oxygen-webhelp subdirectory from the output directory. The path is relative to the current HTML file.
  • oxygen-webhelp-template-dir - The path to the template directory. The path is relative to the current HTML file.
    ${path(oxygen-webhelp-template-dir)} 
Note: New paths IDs can be added by overriding the wh-macro-custom-path template from com.oxygenxml.webhelp.responsive\xsl\template\macroExpander.xsl:
<!-- Extension template for expanding a custom path macro. -->
<xsl:template name="wh-macro-custom-path">
    <xsl:param name="pathId"/>
    <xsl:value-of select="$pathId"/>
</xsl:template>     
map-xpath
Can be used to execute an XPath expression over the DITA map file from the temporary directory.
Tip: Available in all template layout HTML pages.
${map-xpath(/map/title)}
topic-xpath
Can be used to execute an XPath expression over the current topic.
Tip: Available only in the topic HTML page template (wt_topic.html).
${topic-xpath(string-join(//shortdesc//text(), ' '))}
oxygen-webhelp-build-number
Returns the current WebHelp distribution ID (build number).
${oxygen-webhelp-build-number}

Referencing the HTML fragment using a Publishing Template

  1. If you have not already created a Publishing Template, see Working with Publishing Templates.
  2. Insert the HTML content in a well-formed XML file (for example, custom-html.html).
  3. Using the Project view, copy your custom HTML fragment in a folder inside publishing the template root folder (for example, in the custom_footer_template/html-fragments folder).
  4. Open the template descriptor file associated with your publishing template and add a reference to the custom HTML fragment in the html-fragments section.
    <publishing-template>
        ...    
        <webhelp>
          ...
          <html-fragments>
            <fragment 
              file="html-fragments/custom-html.html" 
              placeholder="webhelp.fragment.head"/>
    Note: If you want to insert the content in another location within the output document, you can reference the XML file from any other HTML Fragment extension points.
  5. Open the DITA Map WebHelp Responsive transformation scenario.
  6. Click the Choose Custom Publishing Template link and select your template.
  7. Click OK to save the changes to the transformation scenario.
  8. Run the transformation scenario.

Results: Your additional content will be included at the end of the head element of your output document.

Referencing the HTML Fragment using a Transformation Parameter

  1. Insert the HTML content in a well-formed XML file.
  2. Edit the DITA Map WebHelp Responsive transformation scenario and open the Parameters tab.
  3. Edit the value of the webhelp.fragment.head parameter and set it to the absolute path of your XML file.
    Note: If you want to insert the content in another location within the output document, you can reference the XML file from any other HTML Fragment extension points.
  4. Click OK to save the changes to the transformation scenario.
  5. Run the transformation scenario.

Results: Your additional content will be included at the end of the head element of your output document.