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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OMNIBOX_BROWSER_TAB_MATCHER_H_
#define COMPONENTS_OMNIBOX_BROWSER_TAB_MATCHER_H_
#include <functional>
#include <unordered_map>
#include "base/time/time.h"
#include "build/build_config.h"
#include "components/omnibox/browser/autocomplete_input.h"
#include "url/gurl.h"
#if BUILDFLAG(IS_ANDROID)
#include "base/android/jni_weak_ref.h"
#endif
// Abstraction of a mechanism that associates GURL objects with open tabs.
class TabMatcher {
public:
// Information about presence of open tabs that match supplied URL.
// The open tab information may be platform specific.
struct TabInfo {
// Whether a tab with matching URL exists.
bool has_matching_tab{};
#if BUILDFLAG(IS_ANDROID)
// Weak pointer to an Android Tab for the supplied GURL.
JavaObjectWeakGlobalRef android_tab{};
#endif
};
// Mechanism that facilitates hashing of the GURL objects.
struct GURLHash {
size_t operator()(const GURL& url) const {
return std::hash<std::string>()(url.spec());
}
};
// Wrapper for tab information used by OpenTabProvider.
struct TabWrapper {
std::u16string title;
GURL url;
base::Time last_shown_time;
TabWrapper(std::u16string title, GURL url, base::Time last_shown_time) {
this->title = title;
this->url = url;
this->last_shown_time = last_shown_time;
}
};
// Map of URLs to TabInfo used for batch tab lookups.
// Note this uses ptr_hash<> for lookups: objects used for insertion must
// outlive the map and serve as direct keys.
using GURLToTabInfoMap = std::unordered_map<GURL, TabInfo, GURLHash>;
TabMatcher() = default;
TabMatcher(TabMatcher&&) = delete;
TabMatcher(const TabMatcher&) = delete;
TabMatcher& operator=(TabMatcher&&) = delete;
TabMatcher& operator=(const TabMatcher&) = delete;
virtual ~TabMatcher() = default;
// For a given URL, check if a tab already exists where that URL is already
// opened.
// Returns true, if the URL can be matched to existing tab, otherwise false.
virtual bool IsTabOpenWithURL(const GURL& gurl,
const AutocompleteInput* input) const = 0;
// For a given input GURLToTabInfoMap, in-place update the map with the
// TabInfo details.
// The matching operation is performed in a batch, offering performance
// benefits on Android where the operation is otherwise very expensive.
virtual void FindMatchingTabs(GURLToTabInfoMap* map,
const AutocompleteInput* input) const;
// Returns tab wrappers for all open tabs for the current profile.
virtual std::vector<TabWrapper> GetOpenTabs(
const AutocompleteInput* input,
bool exclude_active_tab = true) const;
};
#endif // COMPONENTS_OMNIBOX_BROWSER_TAB_MATCHER_H_
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