Examples with CSSStyleDeclarationImpl com.steadystate.css.dom.CSSStyleDeclarationImpl used on opensource projects

Example 1 with CSSStyleDeclarationImpl

use of com.steadystate.css.dom.CSSStyleDeclarationImpl in project java-to-graphviz by randomnoun.

the class StylesheetApplier method apply.

/**
 * actually inline the styles
 */
public void apply() {
    final Multimap<Element, StyleApplication> elementMatches = ArrayListMultimap.create();
    final CSSOMParser inlineParser = new CSSOMParser();
    inlineParser.setErrorHandler(new ExceptionErrorHandler());
    // factor in elements' style attributes
    NodeTraversor.traverse(new NodeVisitor() {

        @Override
        public void head(Node node, int depth) {
            if (node instanceof Element && node.hasAttr("style")) {
                // parse the CSS into a CSSStyleDeclaration
                InputSource input = new InputSource(new StringReader(node.attr("style")));
                CSSStyleDeclaration declaration = null;
                try {
                    declaration = inlineParser.parseStyleDeclaration(input);
                } catch (IOException e) {
                    // again, this should never happen, cuz we're just reading from a string
                    e.printStackTrace();
                }
                node.removeAttr("style");
                elementMatches.put(((Element) node), new InlineStyleApplication(declaration));
            }
        }

        @Override
        public void tail(Node node, int depth) {
        }
    }, htmlDocument.body());
    // compute which rules match which elements
    CSSRuleList rules = styleSheet.getCssRules();
    for (int i = 0; i < rules.getLength(); i++) {
        if (rules.item(i) instanceof CSSStyleRule) {
            CSSStyleRuleImpl rule = (CSSStyleRuleImpl) rules.item(i);
            // for each selector in the rule... (separated by commas)
            for (int j = 0; j < rule.getSelectors().getLength(); j++) {
                Selector selector = rule.getSelectors().item(j);
                Elements matches = null;
                // selector.toString() converts a~=b to a~="b" which then includes the double quotes in the regex
                // could remove this but the jsoup impl to ~= is wrong anyway ( should be performing a word search, not a regex )
                matches = htmlDocument.select(selector.toString());
                // for each matched element....
                for (Element match : matches) {
                    elementMatches.put(match, new RuleStyleApplication(selector, rule.getStyle()));
                }
            }
        }
    }
    Map<Element, CSSStyleDeclaration> inlinedStyles = new HashMap<Element, CSSStyleDeclaration>();
    // calculate overrides
    for (Element element : elementMatches.keySet()) {
        CSSStyleDeclaration properties = new CSSStyleDeclarationImpl();
        List<StyleApplication> matchedRules = new ArrayList<StyleApplication>(elementMatches.get(element));
        Collections.sort(matchedRules, orderBySpecificity);
        for (StyleApplication matchedRule : matchedRules) {
            CSSStyleDeclaration cssBlock = matchedRule.getCssBlock();
            for (int i = 0; i < cssBlock.getLength(); i++) {
                String propertyKey = cssBlock.item(i);
                CSSValue propertyValue = cssBlock.getPropertyCSSValue(propertyKey);
                // TODO: !important
                properties.setProperty(propertyKey, propertyValue.getCssText(), "");
            }
        }
        inlinedStyles.put(element, properties);
    }
    // apply to DOM
    for (Map.Entry<Element, CSSStyleDeclaration> entry : inlinedStyles.entrySet()) {
        entry.getKey().attr("style", entry.getValue().getCssText());
    }
}