Package com.google.common.css.compiler.passes

Class RemoveVendorSpecificProperties

java.lang.Object

com.google.common.css.compiler.ast.DefaultTreeVisitor

com.google.common.css.compiler.passes.RemoveVendorSpecificProperties

All Implemented Interfaces:

AtRuleHandler, CssCompilerPass, CssTreeVisitor

public class RemoveVendorSpecificProperties
extends DefaultTreeVisitor
implements CssCompilerPass

A CssCompilerPass that removes all vendor-specific properties, except for one Vendor that is specified in the constructor. This is designed to facilitate creating a vendor-specific stylesheet. For example, suppose you have the following CSS:

 .button {
   border-radius: 2px;
   -moz-border-radius: 2px;
   -webkit-border-radius: 2px;
 }
 

If Vendor.WEBKIT were specified as the "vendor to keep" when running this pass, then the resulting CSS would be:

 .button {
   border-radius: 2px;
   -webkit-border-radius: 2px;
 }
 

border-radius would not be removed because it is not a vendor-specific property, and -webkit-border-radius would not be removed because Vendor.WEBKIT was specified as the "vendor to keep." Only -moz-border-radius is removed because it is vendor-specific, but it is not the whitelisted vendor. If there were properties prefixed with "-o-" for Opera or "-ms-" for Microsoft, then those would have been removed, as well.

Constructor Summary

Constructors

Constructor	Description
RemoveVendorSpecificProperties(Vendor vendorToKeep, MutatingVisitController visitController)

Method Summary

Modifier and Type	Method	Description
boolean	enterDeclaration(CssDeclarationNode declarationNode)	Checks whether the Property of declarationNode is a vendor-specific property that does not match vendorToKeep.
void	runPass()

Methods inherited from class com.google.common.css.compiler.ast.DefaultTreeVisitor

enterArgumentNode, enterAttributeSelector, enterBlock, enterCharSet, enterClassSelector, enterCombinator, enterComponent, enterCompositeValueNode, enterCompositeValueNodeOperator, enterConditionalBlock, enterConditionalRule, enterDeclarationBlock, enterDefinition, enterFontFace, enterForLoop, enterFunctionNode, enterIdSelector, enterImportBlock, enterImportRule, enterKey, enterKeyBlock, enterKeyframeRuleset, enterKeyframesRule, enterMediaRule, enterMediaTypeListDelimiter, enterMixin, enterMixinDefinition, enterPageRule, enterPageSelector, enterPropertyValue, enterProvideNode, enterPseudoClass, enterPseudoElement, enterRequireNode, enterRuleset, enterSelector, enterSelectorBlock, enterTree, enterUnknownAtRule, enterValueNode, leaveArgumentNode, leaveAttributeSelector, leaveBlock, leaveCharSet, leaveClassSelector, leaveCombinator, leaveComponent, leaveCompositeValueNode, leaveCompositeValueNodeOperator, leaveConditionalBlock, leaveConditionalRule, leaveDeclaration, leaveDeclarationBlock, leaveDefinition, leaveFontFace, leaveForLoop, leaveFunctionNode, leaveIdSelector, leaveImportBlock, leaveImportRule, leaveKey, leaveKeyBlock, leaveKeyframeRuleset, leaveKeyframesRule, leaveMediaRule, leaveMediaTypeListDelimiter, leaveMixin, leaveMixinDefinition, leavePageRule, leavePageSelector, leavePropertyValue, leaveProvideNode, leavePseudoClass, leavePseudoElement, leaveRequireNode, leaveRuleset, leaveSelector, leaveSelectorBlock, leaveTree, leaveUnknownAtRule, leaveValueNode

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RemoveVendorSpecificProperties

public RemoveVendorSpecificProperties(@Nonnull
                                      Vendor vendorToKeep,
                                      MutatingVisitController visitController)

Parameters:

vendorToKeep - determines the vendor for whose vendor-specific properties will not be stripped. This parameter may not be null: if there is no such venor, then this pass should not be used.

visitController - to facilitate traversing the AST

Method Detail

enterDeclaration

public boolean enterDeclaration(CssDeclarationNode declarationNode)

Checks whether the Property of declarationNode is a vendor-specific property that does not match vendorToKeep. If so, then the declaration is removed.

Specified by:

enterDeclaration in interface CssTreeVisitor

Overrides:

enterDeclaration in class DefaultTreeVisitor

runPass

public void runPass()

Specified by:

runPass in interface CssCompilerPass