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// Copyright 2015 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 CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_IS_BOOKMARKED_CONDITION_TRACKER_H_
#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_IS_BOOKMARKED_CONDITION_TRACKER_H_
#include <map>
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/scoped_observer.h"
#include "chrome/browser/extensions/api/declarative_content/content_predicate_evaluator.h"
#include "components/bookmarks/browser/base_bookmark_model_observer.h"
#include "components/bookmarks/browser/bookmark_model.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/common/extension.h"
namespace base {
class Value;
}
namespace extensions {
// Tests the bookmarked state of the page.
class DeclarativeContentIsBookmarkedPredicate : public ContentPredicate {
public:
~DeclarativeContentIsBookmarkedPredicate() override;
bool IsIgnored() const override;
bool is_bookmarked() const { return is_bookmarked_; }
static std::unique_ptr<DeclarativeContentIsBookmarkedPredicate> Create(
ContentPredicateEvaluator* evaluator,
const Extension* extension,
const base::Value& value,
std::string* error);
// ContentPredicate:
ContentPredicateEvaluator* GetEvaluator() const override;
private:
DeclarativeContentIsBookmarkedPredicate(
ContentPredicateEvaluator* evaluator,
scoped_refptr<const Extension> extension,
bool is_bookmarked);
// Weak.
ContentPredicateEvaluator* const evaluator_;
scoped_refptr<const Extension> extension_;
bool is_bookmarked_;
DISALLOW_COPY_AND_ASSIGN(DeclarativeContentIsBookmarkedPredicate);
};
// Supports tracking of URL matches across tab contents in a browser context,
// and querying for the matching condition sets.
class DeclarativeContentIsBookmarkedConditionTracker
: public ContentPredicateEvaluator,
public bookmarks::BaseBookmarkModelObserver {
public:
DeclarativeContentIsBookmarkedConditionTracker(
content::BrowserContext* context,
Delegate* delegate);
~DeclarativeContentIsBookmarkedConditionTracker() override;
// ContentPredicateEvaluator:
std::string GetPredicateApiAttributeName() const override;
std::unique_ptr<const ContentPredicate> CreatePredicate(
const Extension* extension,
const base::Value& value,
std::string* error) override;
void TrackPredicates(
const std::map<const void*, std::vector<const ContentPredicate*>>&
predicates) override;
void StopTrackingPredicates(
const std::vector<const void*>& predicate_groups) override;
void TrackForWebContents(content::WebContents* contents) override;
void OnWebContentsNavigation(
content::WebContents* contents,
content::NavigationHandle* navigation_handle) override;
bool EvaluatePredicate(const ContentPredicate* predicate,
content::WebContents* tab) const override;
private:
class PerWebContentsTracker : public content::WebContentsObserver {
public:
using RequestEvaluationCallback =
base::Callback<void(content::WebContents*)>;
using WebContentsDestroyedCallback =
base::Callback<void(content::WebContents*)>;
PerWebContentsTracker(
content::WebContents* contents,
const RequestEvaluationCallback& request_evaluation,
const WebContentsDestroyedCallback& web_contents_destroyed);
~PerWebContentsTracker() override;
void BookmarkAddedForUrl(const GURL& url);
void BookmarkRemovedForUrls(const std::set<GURL>& urls);
void UpdateState(bool request_evaluation_if_unchanged);
bool is_url_bookmarked() {
return is_url_bookmarked_;
}
private:
bool IsCurrentUrlBookmarked();
// content::WebContentsObserver
void WebContentsDestroyed() override;
bool is_url_bookmarked_;
const RequestEvaluationCallback request_evaluation_;
const WebContentsDestroyedCallback web_contents_destroyed_;
DISALLOW_COPY_AND_ASSIGN(PerWebContentsTracker);
};
// bookmarks::BookmarkModelObserver implementation.
void BookmarkModelChanged() override;
void BookmarkNodeAdded(bookmarks::BookmarkModel* model,
const bookmarks::BookmarkNode* parent,
size_t index) override;
void BookmarkNodeRemoved(bookmarks::BookmarkModel* model,
const bookmarks::BookmarkNode* parent,
size_t old_index,
const bookmarks::BookmarkNode* node,
const std::set<GURL>& no_longer_bookmarked) override;
void ExtensiveBookmarkChangesBeginning(
bookmarks::BookmarkModel* model) override;
void ExtensiveBookmarkChangesEnded(
bookmarks::BookmarkModel* model) override;
void GroupedBookmarkChangesBeginning(
bookmarks::BookmarkModel* model) override;
void GroupedBookmarkChangesEnded(
bookmarks::BookmarkModel* model) override;
// Called by PerWebContentsTracker on web contents destruction.
void DeletePerWebContentsTracker(content::WebContents* tracker);
// Updates the bookmark state of all per-WebContents trackers.
void UpdateAllPerWebContentsTrackers();
// Weak.
Delegate* const delegate_;
// Maps WebContents to the tracker for that WebContents state.
std::map<content::WebContents*, std::unique_ptr<PerWebContentsTracker>>
per_web_contents_tracker_;
// Count of the number of extensive bookmarks changes in progress (e.g. due to
// sync). The rules need only be evaluated once after the extensive changes
// are complete.
int extensive_bookmark_changes_in_progress_;
ScopedObserver<bookmarks::BookmarkModel, bookmarks::BookmarkModelObserver>
scoped_bookmarks_observer_{this};
DISALLOW_COPY_AND_ASSIGN(DeclarativeContentIsBookmarkedConditionTracker);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_IS_BOOKMARKED_CONDITION_TRACKER_H_
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