Example usage for com.google.gwt.dev.cfg ModuleDef findPublicFile

Introduction

In this page you can find the example usage for com.google.gwt.dev.cfg ModuleDef findPublicFile.

Prototype

public synchronized Resource findPublicFile(String partialPath) 

Source Link

Usage

From source file:cc.alcina.framework.entity.gen.SimpleCssResourceGenerator.java

License:Apache License

private String replaceWithDataUrls(ResourceContext context, String toWrite) throws Exception {
    Pattern urlPat = Pattern.compile("url\\s*\\((?!'?data:)(?!http:)(.+?)\\)");
    Matcher m = urlPat.matcher(toWrite);
    while (m.find()) {
        String url = m.group(1);//ww  w .  j  a va2s.c o  m
        int qIdx = url.indexOf('?');
        if (qIdx != -1) {
            url = url.substring(0, qIdx);
        }
        // url = url.replaceFirst("(.+?)\\?.*", "$1");
        url = url.replace("'", "").replace("\"", "");
        StandardGeneratorContext generatorContext = (StandardGeneratorContext) context.getGeneratorContext();
        Field compilerContextField = StandardGeneratorContext.class.getDeclaredField("compilerContext");
        compilerContextField.setAccessible(true);
        CompilerContext compilerContext = (CompilerContext) compilerContextField.get(generatorContext);
        Field moduleField = CompilerContext.class.getDeclaredField("module");
        moduleField.setAccessible(true);
        ModuleDef module = (ModuleDef) moduleField.get(compilerContext);
        Resource resource = module.findPublicFile(url);
        if (resource == null) {
            resource = module.findPublicFile("gwt/standard/" + url);
        }
        if (resource == null) {
            if (url.contains("://")) {
                continue;
            } else {
                if (logMissingUrlResources) {
                    String[] pub = getAllPublicFiles(module);
                    // System.out.println("missing url resource - " + url);
                    for (String path : pub) {
                        if (path.contains(url)) {
                            System.out.format("Maybe - %s : %s\n", url, path);
                        }
                    }
                }
                continue;
            }
        }
        InputStream contents = resource.openContents();
        byte[] bytes = ResourceUtilities.readStreamToByteArray(contents);
        String out = Base64.encodeBytes(bytes);
        String fileName = url.replaceFirst(".+/", "");
        String extension = fileName.replaceFirst(".+\\.", "");
        String mimeType = null;
        if (extension.toLowerCase().equals("gif")) {
            mimeType = "image/gif";
        } else if (extension.toLowerCase().equals("jpeg")) {
            mimeType = "image/jpeg";
        } else if (extension.toLowerCase().equals("jpg")) {
            mimeType = "image/jpeg";
        } else if (extension.toLowerCase().equals("png")) {
            mimeType = "image/png";
        }
        if (mimeType != null) {
            String encoded = String.format("url(data:%s;base64,%s)", mimeType, out.replace("\n", ""));
            if (encoded.length() > 5000) {
                // System.out.println("warn - large css sprite - " + url);
            }
            if (encoded.length() < MAX_DATA_URL_LENGTH) {
                toWrite = m.replaceFirst(encoded);
                m = urlPat.matcher(toWrite);
            }
        } else {
            System.out.println("unable to resolve mime type - " + url);
            // continue on
        }
    }
    return toWrite;
}

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