Need some examples about CSS Parser

[QuangHoang]

I'm try to use this library but I don't know how to start, can sombody help me
?

[Anonymous]

Hi

I too looked in vain for a basic usage example. Finding none, I poked around
the code. I wrote the following JUnit test. It reads and parses a simple css
file and then walks through the CSSStyleSheet object that the parse operation
has created. So, this exercises the CSS DOM api. I have not yet tried to
exercise the SAC api.

Hope it helps you.

JSandoe

package com.steadystate.css;

import com.steadystate.css.parser.CSSOMParser;

import java.io.InputStream;

import java.io.InputStreamReader;

import junit.framework.Test;

import junit.framework.TestCase;

import junit.framework.TestSuite;

import org.w3c.css.sac.InputSource;

import org.w3c.dom.css.CSSStyleSheet;

import org.w3c.dom.css.CSSRuleList;

import org.w3c.dom.css.CSSRule;

import org.w3c.dom.css.CSSStyleRule;

import org.w3c.dom.css.CSSStyleDeclaration;

import org.apache.log4j.Logger;

/**

• Unit test for simple App.
  */
  public class BasicTest

extends TestCase

{

private static final Logger logger = Logger.getLogger(BasicTest.class);

public void testParse() throws Exception

{

// get css file. In this case it is accessed as a resource.

InputStream stream = this.getClass().getResourceAsStream("/simple.css");

assertNotNull(stream);

// wrap as an InputSource

InputSource source = new InputSource(new InputStreamReader(stream));

// instantiate a parser

CSSOMParser parser = new CSSOMParser();

// parse and create a stylesheet

CSSStyleSheet stylesheet = parser.parseStyleSheet(source, null, null);

// now we can open up the dom and look at what is inside. Naturally, this is
first a list of rules.

CSSRuleList ruleList = stylesheet.getCssRules();

logger.info("Number of rules: " + ruleList.getLength());

// in our case there is just one rule.

assertEquals(1, ruleList.getLength());

// lets examine the stylesheet contents

for (int i = 0; i < ruleList.getLength(); i++) {

CSSRule rule = ruleList.item(i);

if (rule instanceof CSSStyleRule) {

CSSStyleRule styleRule=(CSSStyleRule)rule;

logger.info("selector: " + styleRule.getSelectorText());

CSSStyleDeclaration styleDeclaration = styleRule.getStyle();

assertEquals(1, styleDeclaration.getLength());

for (int j = 0; j < styleDeclaration.getLength(); j++) {

String property = styleDeclaration.item(j);

logger.info("property: " + property);

logger.info("value: " +
styleDeclaration.getPropertyCSSValue(property).getCssText());

}

}

}

}

}

Here is the (very simple) css file (named simple.css) I used for my test case:

p { color:red; }