content/child/simple_webmimeregistry_impl.cc

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/child/simple_webmimeregistry_impl.h"

#include "base/files/file_path.h"
#include "base/strings/string_util.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "components/mime_util/mime_util.h"
#include "media/base/mime_util.h"
#include "net/base/mime_util.h"
#include "third_party/WebKit/public/platform/FilePathConversion.h"
#include "third_party/WebKit/public/platform/WebString.h"

using blink::WebString;
using blink::WebMimeRegistry;

namespace content {

// static
std::string SimpleWebMimeRegistryImpl::ToASCIIOrEmpty(const WebString& string) {
  return base::IsStringASCII(string)
      ? base::UTF16ToASCII(base::StringPiece16(string))
      : std::string();
}

WebMimeRegistry::SupportsType SimpleWebMimeRegistryImpl::supportsMIMEType(
    const WebString& mime_type) {
  return mime_util::IsSupportedMimeType(ToASCIIOrEmpty(mime_type))
             ? WebMimeRegistry::IsSupported
             : WebMimeRegistry::IsNotSupported;
}

WebMimeRegistry::SupportsType SimpleWebMimeRegistryImpl::supportsImageMIMEType(
    const WebString& mime_type) {
  return mime_util::IsSupportedImageMimeType(ToASCIIOrEmpty(mime_type))
             ? WebMimeRegistry::IsSupported
             : WebMimeRegistry::IsNotSupported;
}

WebMimeRegistry::SupportsType
    SimpleWebMimeRegistryImpl::supportsImagePrefixedMIMEType(
    const WebString& mime_type) {
    std::string ascii_mime_type = ToASCIIOrEmpty(mime_type);
    return (mime_util::IsSupportedImageMimeType(ascii_mime_type) ||
            (base::StartsWith(ascii_mime_type, "image/",
                              base::CompareCase::SENSITIVE) &&
             mime_util::IsSupportedNonImageMimeType(ascii_mime_type)))
               ? WebMimeRegistry::IsSupported
               : WebMimeRegistry::IsNotSupported;
}

WebMimeRegistry::SupportsType
    SimpleWebMimeRegistryImpl::supportsJavaScriptMIMEType(
    const WebString& mime_type) {
  return mime_util::IsSupportedJavascriptMimeType(ToASCIIOrEmpty(mime_type))
             ? WebMimeRegistry::IsSupported
             : WebMimeRegistry::IsNotSupported;
}

// When debugging layout tests failures in the test shell,
// see TestShellWebMimeRegistryImpl.
WebMimeRegistry::SupportsType SimpleWebMimeRegistryImpl::supportsMediaMIMEType(
    const WebString& mime_type,
    const WebString& codecs) {
  // Media features are only supported at the content/renderer/ layer.
  return IsNotSupported;
}

bool SimpleWebMimeRegistryImpl::supportsMediaSourceMIMEType(
    const WebString& mime_type,
    const WebString& codecs) {
  // Media features are only supported at the content/renderer layer.
  const std::string mime_type_ascii = ToASCIIOrEmpty(mime_type);
  return media::IsSupportedMediaMimeType(mime_type_ascii);
}

WebMimeRegistry::SupportsType
    SimpleWebMimeRegistryImpl::supportsNonImageMIMEType(
    const WebString& mime_type) {
  return mime_util::IsSupportedNonImageMimeType(ToASCIIOrEmpty(mime_type))
             ? WebMimeRegistry::IsSupported
             : WebMimeRegistry::IsNotSupported;
}

WebString SimpleWebMimeRegistryImpl::mimeTypeForExtension(
    const WebString& file_extension) {
  std::string mime_type;
  net::GetMimeTypeFromExtension(
      blink::WebStringToFilePath(file_extension).value(), &mime_type);
  return WebString::fromUTF8(mime_type);
}

WebString SimpleWebMimeRegistryImpl::wellKnownMimeTypeForExtension(
    const WebString& file_extension) {
  std::string mime_type;
  net::GetWellKnownMimeTypeFromExtension(
      blink::WebStringToFilePath(file_extension).value(), &mime_type);
  return WebString::fromUTF8(mime_type);
}

}  // namespace content