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

Class MarkRemovableRulesetNodes

java.lang.Object

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

com.google.common.css.compiler.ast.SkippingTreeVisitor

com.google.common.css.compiler.passes.MarkRemovableRulesetNodes

All Implemented Interfaces:

AtRuleHandler, CssCompilerPass, CssTreeVisitor

Direct Known Subclasses:

MarkRemovableRulesetNodesForChunk

public class MarkRemovableRulesetNodes
extends SkippingTreeVisitor
implements CssCompilerPass

Compiler pass that marks the ruleset nodes that should be removed from the tree.

This pass assumes that each ruleset node contains exactly one declaration and one selector. This pass should be preceded by SplitRulesetNodes pass. This pass skips over nodes in the body that are not ruleset nodes and ignores all their children including ruleset nodes. So, in particular, all ruleset nodes contained within @media rules will be ignored.

Constructor Summary

Constructors

Constructor	Description
MarkRemovableRulesetNodes(CssTree tree)	Creates a new pass over the specified tree.
MarkRemovableRulesetNodes(CssTree tree, boolean skipping)	Creates a new pass over the specified tree.

Method Summary

Modifier and Type	Method	Description
boolean	enterBlock(CssBlockNode block)	Called before visiting a CssBlockNode's sub trees
void	runPass()
void	setReferencedRules(Set<String> referencedRules, String prefixOfReferencedRules)	Sets the reference rules.

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

canModifyRuleset, isSkipping

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

enterArgumentNode, enterAttributeSelector, enterCharSet, enterClassSelector, enterCombinator, enterComponent, enterCompositeValueNode, enterCompositeValueNodeOperator, enterConditionalBlock, enterConditionalRule, enterDeclaration, 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 Details

MarkRemovableRulesetNodes

public MarkRemovableRulesetNodes(CssTree tree)

Creates a new pass over the specified tree.

MarkRemovableRulesetNodes

public MarkRemovableRulesetNodes(CssTree tree,
 boolean skipping)

Creates a new pass over the specified tree.

Parameters:

skipping - whether to skip over rulesets containing properties that might make them unsafe to modify (see SkippingTreeVisitor)

Method Details

setReferencedRules

public void setReferencedRules(Set<String> referencedRules,
 String prefixOfReferencedRules)

Sets the reference rules.

Parameters:

referencedRules - the set of referenced rules, which, since it is aliased, is expected not to change while this pass is in progress

prefixOfReferencedRules - the prefix to match when looking for unreferenced rules

enterBlock

public boolean enterBlock(CssBlockNode block)

Description copied from interface: CssTreeVisitor

Called before visiting a CssBlockNode's sub trees

Specified by:

enterBlock in interface CssTreeVisitor

Overrides:

enterBlock in class DefaultTreeVisitor

runPass

public void runPass()

Specified by:

runPass in interface CssCompilerPass