Example usage for com.google.common.css.compiler.commandline ClosureCommandLineCompiler main

Introduction

In this page you can find the example usage for com.google.common.css.compiler.commandline ClosureCommandLineCompiler main.

Prototype

public static void main(String[] args) 

Source Link

Usage

From source file:org.ctoolkit.maven.plugins.optimizer.CssOptimizer.java

/**
 * Process css optimization/* www.j  a v  a  2 s.  com*/
 *
 * @param pathToXml     path to css configuration xml
 * @param cssOutputPath css output path
 */
public static void process(String pathToXml, String cssOutputPath, String baseDir) {
    if (pathToXml == null || pathToXml.trim().isEmpty()) {
        log.info("Css path to xml is not set. Skipping css optimization.");
        return;
    }

    if (!new File(pathToXml).exists()) {
        throw new IllegalArgumentException("Css path to xml does not exists: " + pathToXml);
    }

    log.info("Starting to optimize css...");

    try {
        for (CSSConfig cssConfig : getCssConfigList(pathToXml, baseDir)) {
            String cssOutputFileName = cssConfig.getCssOutputName();
            List<String> cssPaths = new ArrayList<>();

            // create external css files
            for (String externalCssContent : cssConfig.getExternalCssList()) {
                String externalCssFileName = FileHelper
                        .writeToFile(File.createTempFile("externalCssFile", ".css"), externalCssContent);
                cssPaths.add(externalCssFileName);
            }

            // encode images in css
            for (String cssCustomInputFileName : cssConfig.getCssList()) {
                File cssCustomFile = new File(cssCustomInputFileName);

                if (cssCustomFile.exists()) {
                    String cssCustomString = encodeImages(cssCustomFile);
                    String encodedCssFileName = FileHelper
                            .writeToFile(File.createTempFile("encodedCssFile", ".css"), cssCustomString);

                    cssPaths.add(encodedCssFileName);
                }
            }

            // minify css
            String cssOutputString;
            if (cssConfig.getMinfy()) {
                cssPaths.add("-o"); // set output file parameter as temp file (we will load its content into cssOutputString
                File cssMinifiedFile = File.createTempFile("minifiedCssFile", "css");
                cssPaths.add(cssMinifiedFile.getAbsolutePath());
                ClosureCommandLineCompiler.main(cssPaths.toArray(new String[cssPaths.size()]));

                cssOutputString = Files.toString(cssMinifiedFile, Charsets.UTF_8);

                log.info("CSS minified output:\n===\n" + cssOutputString + "\n===\n");
            } else {
                StringBuilder output = new StringBuilder();
                for (String cssPath : cssPaths) {
                    output.append(Files.toString(new File(cssPath), Charsets.UTF_8));
                }

                cssOutputString = output.toString();
            }

            // create final css file
            String optimizedCss = FileHelper.createOutputFile(cssOutputPath, cssOutputFileName,
                    cssOutputString);

            log.info(">>> Css optimization finished successfully. Optimized css file can be found at: "
                    + optimizedCss);
        }
    } catch (Exception e) {
        log.log(Level.SEVERE, "Error occurred during processing css: ", e);
    }
}

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