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// Copyright 2016 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.
#ifndef CONTENT_PUBLIC_COMMON_PREVIEWS_STATE_H_
#define CONTENT_PUBLIC_COMMON_PREVIEWS_STATE_H_
namespace content {
typedef int PreviewsState;
// The Previews types which determines whether to request a Preview version of
// the resource. Previews are optimizations that change the format and
// content of web pages to improve data savings and / or performance. This enum
// determines which Previews types to request.
// Deprecated values should be commented out and not reused since this bitmask
// is persisted on disk.
enum PreviewsTypes {
PREVIEWS_UNSPECIFIED = 0, // Let the browser process decide whether or
// not to request Preview types.
// DEPRECATED: SERVER_LOFI_ON = 1 << 0, Request a Lo-Fi version of the
// resource from the server. This preview type has been deprecated and should
// no longer be used.
// DEPRECATED: CLIENT_LOFI_ON = 1 << 1, Request a Lo-Fi version of the
// resource from the client. This preview type has been deprecated and should
// no longer be used.
CLIENT_LOFI_AUTO_RELOAD = 1 << 2, // Request the original version of the
// resource after a decoding error occurred
// when attempting to use Client Lo-Fi.
SERVER_LITE_PAGE_ON = 1 << 3, // Request a Lite Page version of the
// resource from the server.
PREVIEWS_NO_TRANSFORM = 1 << 4, // Explicitly forbid Previews
// transformations.
PREVIEWS_OFF = 1 << 5, // Request a normal (non-Preview) version of
// the resource. Server transformations may
// still happen if the page is heavy.
NOSCRIPT_ON = 1 << 6, // Request that script be disabled for page load.
RESOURCE_LOADING_HINTS_ON =
1 << 7, // Request that resource loading hints be used during pageload.
OFFLINE_PAGE_ON =
1 << 8, // Request that an offline page be used if one is stored.
// DEPRECATED: LITE_PAGE_REDIRECT_ON = 1 << 9, // Allow the browser to
// redirect the resource to a Lite Page server. Support for this functionality
// has been removed.
DEFER_ALL_SCRIPT_ON = 1 << 10, // Request that script execution be deferred
// until parsing completes.
SUBRESOURCE_REDIRECT_ON =
1 << 11, // Allow the subresources in the page to be redirected to
// serve better optimized resources. Set on subresources.
PREVIEWS_STATE_LAST = SUBRESOURCE_REDIRECT_ON
};
// Combination of all previews that are guaranteed not to provide partial
// content.
// const PreviewsState PARTIAL_CONTENT_SAFE_PREVIEWS = SERVER_LOFI_ON;
// deprecated
// Combination of all currently supported previews.
const PreviewsState ALL_SUPPORTED_PREVIEWS = SERVER_LITE_PAGE_ON | NOSCRIPT_ON |
RESOURCE_LOADING_HINTS_ON |
OFFLINE_PAGE_ON;
} // namespace content
#endif // CONTENT_PUBLIC_COMMON_PREVIEWS_STATE_H_
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