Example usage for org.w3c.dom.css CSSStyleDeclaration getPropertyCSSValue

Introduction

In this page you can find the example usage for org.w3c.dom.css CSSStyleDeclaration getPropertyCSSValue.

Prototype

public CSSValue getPropertyCSSValue(String propertyName);

Source Link

Document

Used to retrieve the object representation of the value of a CSS property if it has been explicitly set within this declaration block.

Usage

From source file:com.pagecrumb.proxy.util.filter.CssProxyTransformParser.java

@Override
public void parse(String document) {
    log.info("Parsing CSS: " + document);
    this.document = document;
    InputSource source = new InputSource(new StringReader(this.document));
    try {/*from   w w w.  j a v  a2  s.c o  m*/
        CSSStyleSheet stylesheet = parser.parseStyleSheet(source, null, null);
        CSSRuleList ruleList = stylesheet.getCssRules();
        log.info("Number of rules: " + 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;
                log.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);
                    log.info("property: " + property);
                    log.info("value: " + styleDeclaration.getPropertyCSSValue(property).getCssText());
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

}

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From source file:com.edgenius.wiki.ext.textnut.NutParser.java

/**
 * Remove tags outside body./* ww w.  j  av  a 2 s.  co  m*/
 * Apply HTML CSS into tag style.
 * Remove default attribute in tag.
 * 
 * @param htmlContent
 * @return
 */
public String convertNutHTMLToPageHTML(String htmlContent) {

    //Parse whole HTML, and separator out CSS and tags list inside body.
    HtmlParser htmlParser = new HtmlParser();
    HtmlNodeListenerImpl listener = new HtmlNodeListenerImpl();
    htmlParser.scan(htmlContent, listener);

    StringBuffer css = new StringBuffer();
    HTMLNodeContainer body = new HTMLNodeContainer();

    //First, exact CSS style part, then remove all element outside body tag
    int require = 0; //1=css;2=body
    HTMLNode endNode = null;
    for (HTMLNode node : listener.getHtmlNode()) {

        if (!node.isTextNode() && "style".equals(node.getTagName()) && !node.isCloseTag()) {
            endNode = node.getPair();
            require = 1;
            continue;
        }
        if (!node.isTextNode() && "body".equals(node.getTagName()) && !node.isCloseTag()) {
            endNode = node.getPair();
            require = 2;
            continue;
        }
        if (endNode != null && require == 1) {
            if (endNode == node) {
                endNode = null;
            } else {
                if (node.isTextNode())
                    css.append(node.getText());
            }

            continue;
        }
        if (endNode != null && require == 2) {
            if (endNode == node) {
                break;
            } else {
                body.add(node);
            }
        }
    }

    // parse and create a stylesheet composition
    CSSOMParser parser = new CSSOMParser();
    //I don't know how to use CSSParser API to quick located style by selector, so blow map will be used for this purpose
    //its key is selector text, value is style list separated by ";" which is able to use in tag "class" attribute.
    Map<String, String> selectors = new HashMap<String, String>();
    try {
        CSSStyleSheet stylesheet = parser
                .parseStyleSheet(new InputSource(new StringReader(css.toString().trim())), null, null);
        CSSRuleList ruleList = stylesheet.getCssRules();
        for (int idx = 0; idx < ruleList.getLength(); idx++) {
            CSSRule rule = ruleList.item(idx);
            if (rule instanceof CSSStyleRule) {
                CSSStyleDeclaration style = ((CSSStyleRule) rule).getStyle();
                StringBuffer buf = new StringBuffer();
                int len = style.getLength();
                for (int idj = 0; idj < len; idj++) {
                    String name = style.item(idj);
                    String value = style.getPropertyCSSValue(name).getCssText();
                    if ("margin".equals(name) && value.equals("0px 0px 0px 0px")) {
                        continue;
                    } else if ("font".equals(name) && value.equals("18px Helvetica")) {
                        //This value must coordinate with TextNut default font setting.
                        continue;
                    }

                    buf.append(name).append(":").append(value).append(";");
                }

                //buf could be blank, even so, we still need put it into map so that class attribute can locate style by name
                selectors.put(((CSSStyleRule) rule).getSelectorText(), buf.toString());

            }
        }

        //debug use: only for display:
        //          for (int idx = 0; idx < ruleList.getLength(); idx++) {
        //              CSSRule rule = ruleList.item(idx);
        //              if (rule instanceof CSSStyleRule){ 
        //                  CSSStyleRule styleRule=(CSSStyleRule)rule;
        //                  CSSStyleDeclaration style = styleRule.getStyle();
        //                  System.out.println(styleRule.getSelectorText());
        //                  for (int idj = 0; idj < style.getLength(); idj++){
        //                       String name = style.item(idj);
        //                       System.out.println(name +"=" + style.getPropertyCSSValue(name).getCssText());
        //                  }
        //              }
        //            }

        //apply CSS to body tags
        HTMLNode node;
        for (Iterator<HTMLNode> iter = body.iterator(); iter.hasNext();) {
            node = iter.next();
            if (node.isTextNode())
                continue;

            if (node.getAttributes() != null && !StringUtils.isBlank(node.getAttributes().get("class"))) {
                //we only support "tagName.styleName" format selector
                String style = selectors.get(node.getTagName() + "." + node.getAttributes().get("class"));
                if (style != null) {
                    if (!"".equals(style)) {
                        //could be blank, if style all removed because they are default value.
                        node.setAttribute("style", style);
                    }
                    node.removeAttribute("class");
                }
            }
            //embedded files object - <object data="file:///index_1.html">index_1.html</object>
            if ("object".equals(node.getTagName()) && node.getAttributes() != null
                    && StringUtils.startsWith(node.getAttributes().get("data"), "file://")) {

            }
        }

        return body.toString().trim();
    } catch (IOException e) {
        log.error("Parse CSS failed", e);
    }
    return htmlContent;
}

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