Example usage for com.google.common.css.compiler.ast DefaultTreeVisitor DefaultTreeVisitor

Introduction

In this page you can find the example usage for com.google.common.css.compiler.ast DefaultTreeVisitor DefaultTreeVisitor.

Prototype

DefaultTreeVisitor

Source Link

Usage

From source file:io.bazel.rules.closure.webfiles.WebfilesValidator.java

private void validateCss(final Path path, final Webpath origin, String source) {
    CssTree stylesheet = cssParser.parse(path.toString(), source);
    new PassRunner(new JobDescriptionBuilder().getJobDescription(), new BasicErrorManager() {
        @Override/*from ww w . j  a v  a 2 s  .c  o m*/
        public void print(String message) {
            WebfilesValidator.this.errors.put(CSS_VALIDATION_ERROR, String.format("%s: %s", path, message));
        }
    }).runPasses(stylesheet);
    stylesheet.getVisitController().startVisit(new DefaultTreeVisitor() {
        private boolean inUrlFunction;

        @Override
        public boolean enterFunctionNode(CssFunctionNode function) {
            return (inUrlFunction = function.getFunction().getFunctionName().equals("url"));
        }

        @Override
        public void leaveFunctionNode(CssFunctionNode value) {
            inUrlFunction = false;
        }

        @Override
        public boolean enterArgumentNode(CssValueNode argument) {
            if (inUrlFunction) {
                String uri = nullToEmpty(argument.getValue());
                if (!shouldIgnoreUri(uri)) {
                    addRelationship(path, origin, Webpath.get(uri));
                }
            }
            return false;
        }
    });
}

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