third_party/WebKit/Source/platform/MIMETypeRegistry.cpp

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#include "platform/MIMETypeRegistry.h"

#include "platform/plugins/PluginData.h"
#include "public/platform/Platform.h"
#include "public/platform/WebMimeRegistry.h"
#include "wtf/text/CString.h"

namespace blink {

String MIMETypeRegistry::getMIMETypeForExtension(const String& ext) {
  return Platform::current()->mimeRegistry()->mimeTypeForExtension(ext);
}

String MIMETypeRegistry::getWellKnownMIMETypeForExtension(const String& ext) {
  // This method must be thread safe and should not consult the OS/registry.
  return Platform::current()->mimeRegistry()->wellKnownMimeTypeForExtension(
      ext);
}

String MIMETypeRegistry::getMIMETypeForPath(const String& path) {
  int pos = path.reverseFind('.');
  if (pos < 0)
    return "application/octet-stream";
  String extension = path.substring(pos + 1);
  String mimeType = getMIMETypeForExtension(extension);
  return mimeType.isEmpty() ? "application/octet-stream" : mimeType;
}

bool MIMETypeRegistry::isSupportedImageMIMEType(const String& mimeType) {
  return Platform::current()->mimeRegistry()->supportsImageMIMEType(
             mimeType.lower()) != WebMimeRegistry::IsNotSupported;
}

bool MIMETypeRegistry::isSupportedImageResourceMIMEType(
    const String& mimeType) {
  return isSupportedImageMIMEType(mimeType);
}

bool MIMETypeRegistry::isSupportedImagePrefixedMIMEType(
    const String& mimeType) {
  return Platform::current()->mimeRegistry()->supportsImagePrefixedMIMEType(
             mimeType.lower()) != WebMimeRegistry::IsNotSupported;
}

bool MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(
    const String& mimeType) {
  if (equalIgnoringCase(mimeType, "image/jpeg") ||
      equalIgnoringCase(mimeType, "image/png"))
    return true;
  if (equalIgnoringCase(mimeType, "image/webp"))
    return true;
  return false;
}

bool MIMETypeRegistry::isSupportedJavaScriptMIMEType(const String& mimeType) {
  return Platform::current()->mimeRegistry()->supportsJavaScriptMIMEType(
             mimeType.lower()) != WebMimeRegistry::IsNotSupported;
}

bool MIMETypeRegistry::isSupportedNonImageMIMEType(const String& mimeType) {
  return Platform::current()->mimeRegistry()->supportsNonImageMIMEType(
             mimeType.lower()) != WebMimeRegistry::IsNotSupported;
}

bool MIMETypeRegistry::isSupportedMediaSourceMIMEType(const String& mimeType,
                                                      const String& codecs) {
  return !mimeType.isEmpty() &&
         Platform::current()->mimeRegistry()->supportsMediaSourceMIMEType(
             mimeType.lower(), codecs);
}

bool MIMETypeRegistry::isJavaAppletMIMEType(const String& mimeType) {
  // Since this set is very limited and is likely to remain so we won't bother
  // with the overhead of using a hash set.  Any of the MIME types below may be
  // followed by any number of specific versions of the JVM, which is why we use
  // startsWith()
  return mimeType.startsWith("application/x-java-applet",
                             TextCaseInsensitive) ||
         mimeType.startsWith("application/x-java-bean", TextCaseInsensitive) ||
         mimeType.startsWith("application/x-java-vm", TextCaseInsensitive);
}

bool MIMETypeRegistry::isSupportedStyleSheetMIMEType(const String& mimeType) {
  return equalIgnoringCase(mimeType, "text/css");
}

bool MIMETypeRegistry::isSupportedFontMIMEType(const String& mimeType) {
  static const unsigned fontLen = 5;
  if (!mimeType.startsWith("font/", TextCaseInsensitive))
    return false;
  String subType = mimeType.substring(fontLen).lower();
  return subType == "woff" || subType == "woff2" || subType == "otf" ||
         subType == "ttf" || subType == "sfnt";
}

bool MIMETypeRegistry::isSupportedTextTrackMIMEType(const String& mimeType) {
  return equalIgnoringCase(mimeType, "text/vtt");
}

}  // namespace blink