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4.4.10. XCSS File Format
Cross-site Cascading Style Sheet (XCSS) files are the core of RichFaces component skinnability. XCSS is XML-formatted CSS that extends the skinning process. RichFaces parses the XCSS file containing all look and feel parameters of a particular component and compiles the information into a standard CSS file that can be recognized by a web browser.
The XCSS file contains CSS properties and skin parameter mappings. Mapping a CSS selector to a skin parameter can be done with
< u:selector > and < u:style> XML tags, which define the mapping structure, as in the following example:
...
<u:selector name=".rich-component-name">
<u:style name="background-color" skin="additionalBackgroundColor" />
<u:style name="border-color" skin="tableBorderColor" />
<u:style name="border-width" skin="tableBorderWidth" />
<u:style name="border-style" value="solid" />
</u:selector>
...
During processing, this code will be parsed and assembled into a standard CSS format, like so:
...
.rich-component-name {
background-color: additionalBackgroundColor; /*the value of the constant defined by your skin*/
border-color: tableBorderColor; /*the value of the constant defined by your skin*/
border-width: tableBorderWidth; /*the value of the constant defined by your skin*/
border-style: solid;
}
...
The
name attribute of <u:selector> defines the CSS selector, while the name attribute of the <u:style> tag defines the skin constant that is mapped to a CSS property. You can also use the value attribute of the <u:style> tag to assign a value to a CSS property.
CSS selectors with identical skin properties can be included in a comma-separated list:
...
<u:selector name=".rich-ordering-control-disabled, .rich-ordering-control-top, .rich-ordering-control-bottom, .rich-ordering-control-up, .rich-ordering-control-down">
<u:style name="border-color" skin="tableBorderColor" />
</u:selector>
...
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