java.lang.Object
- com.helger.css.decl.visit.CSSVisitor

```
@Immutable
public final class CSSVisitor
extends Object
```
This class is used to walk a CSS domain object and call the respective ICSSVisitor and ICSSUrlVisitor interface methods. Method visitCSS(CascadingStyleSheet, ICSSVisitor) is usually the entry point to iterate over the whole content of a parsed CSS.

Author:

Philip Helger

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`visitAllDeclarations(IHasCSSDeclarations<?> aHasDeclarations, ICSSVisitor aVisitor)`	Visit all declarations contained in the passed declaration container.
`static void`	`visitAllDeclarationUrls(IHasCSSDeclarations<?> aCSS, ICSSUrlVisitor aVisitor)`	Visit all items that can contain URLs in CSS files.
`static void`	`visitCSS(CascadingStyleSheet aCSS, ICSSVisitor aVisitor)`	Visit all CSS elements in the order of their declaration. import rules come first, namespace rules come next and all other top-level rules in the order of their declaration.
`static void`	`visitCSSUrl(CascadingStyleSheet aCSS, ICSSUrlVisitor aVisitor)`	Visit all items that can contain URLs in CSS files.
`static void`	`visitFontFaceRule(CSSFontFaceRule aFontFaceRule, ICSSVisitor aVisitor)`	Visit all elements of a single font-face rule.
`static void`	`visitImportRule(CSSImportRule aImportRule, ICSSVisitor aVisitor)`	Visit all elements of a single import rule.
`static void`	`visitKeyframesRule(CSSKeyframesRule aKeyframesRule, ICSSVisitor aVisitor)`	Visit all elements of a single keyframes rule.
`static void`	`visitMediaRule(CSSMediaRule aMediaRule, ICSSVisitor aVisitor)`	Visit all elements of a single media rule.
`static void`	`visitNamespaceRule(CSSNamespaceRule aNamespaceRule, ICSSVisitor aVisitor)`	Visit all elements of a single namespace rule.
`static void`	`visitPageRule(CSSPageRule aPageRule, ICSSVisitor aVisitor)`	Visit all elements of a single page rule.
`static void`	`visitStyleRule(CSSStyleRule aStyleRule, ICSSVisitor aVisitor)`	Visit all elements of a single style rule.
`static void`	`visitSupportsRule(CSSSupportsRule aSupportsRule, ICSSVisitor aVisitor)`	Visit all elements of a single supports rule.
`static void`	`visitTopLevelRule(ICSSTopLevelRule aTopLevelRule, ICSSVisitor aVisitor)`	Visit all elements of a single top-level rule.
`static void`	`visitUnknownRule(CSSUnknownRule aUnknownRule, ICSSVisitor aVisitor)`	Visit all elements of a single unknown @ rule.
`static void`	`visitViewportRule(CSSViewportRule aViewportRule, ICSSVisitor aVisitor)`	Visit all elements of a single viewport rule.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

visitImportRule

public static void visitImportRule(@Nonnull
                                   CSSImportRule aImportRule,
                                   @Nonnull
                                   ICSSVisitor aVisitor)

Visit all elements of a single import rule.

Parameters:: aImportRule - The import rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitNamespaceRule

public static void visitNamespaceRule(@Nonnull
                                      CSSNamespaceRule aNamespaceRule,
                                      @Nonnull
                                      ICSSVisitor aVisitor)

Visit all elements of a single namespace rule.

Parameters:: aNamespaceRule - The namespace rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitAllDeclarations

public static void visitAllDeclarations(@Nonnull
                                        IHasCSSDeclarations<?> aHasDeclarations,
                                        @Nonnull
                                        ICSSVisitor aVisitor)

Visit all declarations contained in the passed declaration container.

Parameters:: aHasDeclarations - The declarations to be visited. May not be null.; aVisitor - The visitor to be invoked on each declaration. May not be null.

visitStyleRule

public static void visitStyleRule(@Nonnull
                                  CSSStyleRule aStyleRule,
                                  @Nonnull
                                  ICSSVisitor aVisitor)

Visit all elements of a single style rule.

Parameters:: aStyleRule - The style rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitPageRule

public static void visitPageRule(@Nonnull
                                 CSSPageRule aPageRule,
                                 @Nonnull
                                 ICSSVisitor aVisitor)

Visit all elements of a single page rule.

Parameters:: aPageRule - The page rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitFontFaceRule

public static void visitFontFaceRule(@Nonnull
                                     CSSFontFaceRule aFontFaceRule,
                                     @Nonnull
                                     ICSSVisitor aVisitor)

Visit all elements of a single font-face rule.

Parameters:: aFontFaceRule - The font-face rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitMediaRule

public static void visitMediaRule(@Nonnull
                                  CSSMediaRule aMediaRule,
                                  @Nonnull
                                  ICSSVisitor aVisitor)

Visit all elements of a single media rule.

Parameters:: aMediaRule - The media rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitKeyframesRule

public static void visitKeyframesRule(@Nonnull
                                      CSSKeyframesRule aKeyframesRule,
                                      @Nonnull
                                      ICSSVisitor aVisitor)

Visit all elements of a single keyframes rule.

Parameters:: aKeyframesRule - The keyframes rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitViewportRule

public static void visitViewportRule(@Nonnull
                                     CSSViewportRule aViewportRule,
                                     @Nonnull
                                     ICSSVisitor aVisitor)

Visit all elements of a single viewport rule.

Parameters:: aViewportRule - The viewport rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitSupportsRule

public static void visitSupportsRule(@Nonnull
                                     CSSSupportsRule aSupportsRule,
                                     @Nonnull
                                     ICSSVisitor aVisitor)

Visit all elements of a single supports rule.

Parameters:: aSupportsRule - The supports rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitUnknownRule

public static void visitUnknownRule(@Nonnull
                                    CSSUnknownRule aUnknownRule,
                                    @Nonnull
                                    ICSSVisitor aVisitor)

Visit all elements of a single unknown @ rule.

Parameters:: aUnknownRule - The unknown rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitTopLevelRule

public static void visitTopLevelRule(@Nonnull
                                     ICSSTopLevelRule aTopLevelRule,
                                     @Nonnull
                                     ICSSVisitor aVisitor)

Visit all elements of a single top-level rule. This includes all rules except @import and @namespace rules.

Parameters:: aTopLevelRule - The top-level rule to visit. May not be null.; aVisitor - The visitor to use. May not be null.

visitCSS
```
public static void visitCSS(@Nonnull
                            CascadingStyleSheet aCSS,
                            @Nonnull
                            ICSSVisitor aVisitor)
```
Visit all CSS elements in the order of their declaration. import rules come first, namespace rules come next and all other top-level rules in the order of their declaration.

Parameters:

aCSS - The CSS to visit. May not be null.

aVisitor - The callback to be invoked for each element found. May not be null.

visitCSSUrl

public static void visitCSSUrl(@Nonnull
                               CascadingStyleSheet aCSS,
                               @Nonnull
                               ICSSUrlVisitor aVisitor)

Visit all items that can contain URLs in CSS files. Therefore the special visitor class CSSVisitorForUrl is used.

Parameters:: aCSS - The CSS to visit. May not be null.; aVisitor - The callback to invoke for each found occurrence. May not be null.
See Also:: CSSVisitorForUrl

visitAllDeclarationUrls

public static void visitAllDeclarationUrls(@Nonnull
                                           IHasCSSDeclarations<?> aCSS,
                                           @Nonnull
                                           ICSSUrlVisitor aVisitor)