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// 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.
#ifndef CONTENT_RENDERER_PERIPHERAL_CONTENT_HEURISTIC_H_
#define CONTENT_RENDERER_PERIPHERAL_CONTENT_HEURISTIC_H_
#include <set>
#include "content/common/content_export.h"
#include "url/origin.h"
namespace content {
class CONTENT_EXPORT PeripheralContentHeuristic {
public:
// Initial decision of the peripheral content decision.
// These numeric values are used in UMA logs; do not change them.
enum Decision {
HEURISTIC_DECISION_PERIPHERAL = 0,
HEURISTIC_DECISION_ESSENTIAL_SAME_ORIGIN = 1,
HEURISTIC_DECISION_ESSENTIAL_CROSS_ORIGIN_BIG = 2,
HEURISTIC_DECISION_ESSENTIAL_CROSS_ORIGIN_WHITELISTED = 3,
HEURISTIC_DECISION_ESSENTIAL_CROSS_ORIGIN_TINY = 4,
HEURISTIC_DECISION_ESSENTIAL_UNKNOWN_SIZE = 5,
HEURISTIC_DECISION_NUM_ITEMS
};
// Returns true if this content should have power saver enabled.
//
// Power Saver is enabled for content that are cross-origin and
// heuristically determined to be not essential to the web page content.
//
// Content is defined to be cross-origin when the source's origin differs
// from the top level frame's origin. For example:
// - Cross-origin: a.com -> b.com/plugin.swf
// - Cross-origin: a.com -> b.com/iframe.html -> b.com/plugin.swf
// - Same-origin: a.com -> b.com/iframe-to-a.html -> a.com/plugin.swf
//
// |origin_whitelist| is the whitelist of content origins.
//
// |main_frame_origin| is the origin of the main frame.
//
// |content_origin| is the origin of the content e.g. plugin or video source.
//
// |width| and |height| are zoom and device scale independent logical pixels.
static Decision GetPeripheralStatus(
const std::set<url::Origin>& origin_whitelist,
const url::Origin& main_frame_origin,
const url::Origin& content_origin,
int width,
int height);
// Returns true if content is considered "large", and thus essential.
// |width| and |height| are zoom and device scale independent logical pixels.
static bool IsLargeContent(int width, int height);
};
} // namespace content
#endif // CONTENT_RENDERER_PERIPHERAL_CONTENT_HEURISTIC_H_
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