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[AI Chat]: Add TabInformer so the front end can be aware of open tabs
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| Original file line number | Diff line number | Diff line change |
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| // Copyright (c) 2025 The Brave Authors. All rights reserved. | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this file, | ||
| // You can obtain one at https://mozilla.org/MPL/2.0/. | ||
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| #include "brave/browser/ui/ai_chat/tab_informer.h" | ||
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| #include <algorithm> | ||
| #include <iterator> | ||
| #include <utility> | ||
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| #include "base/strings/utf_string_conversions.h" | ||
| #include "brave/components/ai_chat/core/common/constants.h" | ||
| #include "brave/components/ai_chat/core/common/mojom/tab_informer.mojom.h" | ||
| #include "chrome/browser/profiles/profile.h" | ||
| #include "chrome/browser/ui/browser.h" | ||
| #include "chrome/browser/ui/browser_finder.h" | ||
| #include "chrome/browser/ui/browser_list.h" | ||
| #include "chrome/browser/ui/tabs/tab_model.h" | ||
| #include "content/public/browser/navigation_entry.h" | ||
| #include "content/public/browser/web_contents.h" | ||
| #include "mojo/public/cpp/bindings/receiver.h" | ||
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| namespace ai_chat { | ||
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| TabInformer::TabInformer(mojo::PendingReceiver<mojom::TabInformer> receiver, | ||
| content::WebContents* owner_contents) | ||
| : owner_contents_(owner_contents), receiver_(this, std::move(receiver)) { | ||
| tracker_.Init(); | ||
| } | ||
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| TabInformer::~TabInformer() = default; | ||
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| content::WebContents* TabInformer::GetFromTab(const mojom::TabPtr& mojom_tab) { | ||
| const tabs::TabHandle handle = tabs::TabHandle(mojom_tab->id); | ||
| tabs::TabInterface* const tab = handle.Get(); | ||
| if (!tab) { | ||
| return nullptr; | ||
| } | ||
| return tab->GetContents(); | ||
| } | ||
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| void TabInformer::AddListener( | ||
| mojo::PendingRemote<mojom::TabListener> listener) { | ||
| auto id = listeners_.Add(std::move(listener)); | ||
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| NotifyListener(listeners_.Get(id), GetState()); | ||
| } | ||
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| void TabInformer::OnTabStripModelChanged( | ||
| TabStripModel* tab_strip_model, | ||
| const TabStripModelChange& change, | ||
| const TabStripSelectionChange& selection) { | ||
| NotifyListeners(); | ||
| } | ||
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| void TabInformer::TabChangedAt(content::WebContents* contents, | ||
| int index, | ||
| TabChangeType change_type) { | ||
| NotifyListeners(); | ||
| } | ||
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| bool TabInformer::ShouldTrackBrowser(Browser* browser) { | ||
| return browser->is_type_normal() && | ||
| browser->profile() == | ||
| Profile::FromBrowserContext(owner_contents_->GetBrowserContext()); | ||
| } | ||
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| TabInformer::State TabInformer::GetState() { | ||
| State state; | ||
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| // Used to determine whether a given window is active. | ||
| auto* active = chrome::FindLastActive(); | ||
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| for (Browser* browser : *BrowserList::GetInstance()) { | ||
| if (!ShouldTrackBrowser(browser)) { | ||
| continue; | ||
| } | ||
| auto window = mojom::Window::New(); | ||
| window->is_active = browser == active; | ||
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| auto* tab_strip_model = browser->tab_strip_model(); | ||
| for (int i = 0; i < tab_strip_model->count(); ++i) { | ||
| auto* contents = tab_strip_model->GetWebContentsAt(i); | ||
| if (!contents) { | ||
| continue; | ||
| } | ||
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| if (!ai_chat::kAllowedContentSchemes.contains( | ||
| contents->GetLastCommittedURL().scheme())) { | ||
| continue; | ||
| } | ||
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| auto tab_state = mojom::Tab::New(); | ||
| tab_state->id = tab_strip_model->GetTabHandleAt(i).raw_value(); | ||
| tab_state->title = base::UTF16ToUTF8(contents->GetTitle()); | ||
| tab_state->url = contents->GetVisibleURL(); | ||
| tab_state->content_id = | ||
| contents->GetController().GetVisibleEntry()->GetUniqueID(); | ||
| window->tabs.push_back(std::move(tab_state)); | ||
| } | ||
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| state.push_back(std::move(window)); | ||
| } | ||
| return state; | ||
| } | ||
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| void TabInformer::NotifyListeners() { | ||
| if (listeners_.empty()) { | ||
| return; | ||
| } | ||
| auto state = GetState(); | ||
| for (auto& listener : listeners_) { | ||
| State clone; | ||
| std::ranges::transform(state, std::back_inserter(clone), | ||
| [](auto& window) { return window.Clone(); }); | ||
| NotifyListener(listener.get(), std::move(clone)); | ||
| } | ||
| } | ||
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| void TabInformer::NotifyListener(mojom::TabListener* listener, State state) { | ||
| listener->TabsChanged(std::move(state)); | ||
| } | ||
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| } // namespace ai_chat |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| // Copyright (c) 2025 The Brave Authors. All rights reserved. | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this file, | ||
| // You can obtain one at https://mozilla.org/MPL/2.0/. | ||
|
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| #ifndef BRAVE_BROWSER_UI_AI_CHAT_TAB_INFORMER_H_ | ||
| #define BRAVE_BROWSER_UI_AI_CHAT_TAB_INFORMER_H_ | ||
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| #include <string_view> | ||
| #include <vector> | ||
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| #include "base/memory/raw_ptr.h" | ||
| #include "brave/components/ai_chat/core/common/mojom/tab_informer.mojom-forward.h" | ||
| #include "brave/components/ai_chat/core/common/mojom/tab_informer.mojom.h" | ||
| #include "chrome/browser/ui/browser_tab_strip_tracker.h" | ||
| #include "chrome/browser/ui/browser_tab_strip_tracker_delegate.h" | ||
| #include "chrome/browser/ui/tabs/tab_strip_model_observer.h" | ||
| #include "content/public/browser/web_contents.h" | ||
| #include "mojo/public/cpp/bindings/pending_receiver.h" | ||
| #include "mojo/public/cpp/bindings/receiver.h" | ||
| #include "mojo/public/cpp/bindings/remote_set.h" | ||
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| namespace ai_chat { | ||
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| class TabInformer : public mojom::TabInformer, | ||
| public BrowserTabStripTrackerDelegate, | ||
| public TabStripModelObserver { | ||
| public: | ||
| using State = std::vector<mojom::WindowPtr>; | ||
| // Note: |TabInformer| should not outlive |owner_contents_|. | ||
| TabInformer(mojo::PendingReceiver<mojom::TabInformer> receiver, | ||
| content::WebContents* owner_contents); | ||
| ~TabInformer() override; | ||
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| static content::WebContents* GetFromTab(const mojom::TabPtr& tab); | ||
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| // mojom::TabInformer | ||
| void AddListener(mojo::PendingRemote<mojom::TabListener> listener) override; | ||
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| // TabStripModelObserver: | ||
| void OnTabStripModelChanged( | ||
| TabStripModel* tab_strip_model, | ||
| const TabStripModelChange& change, | ||
| const TabStripSelectionChange& selection) override; | ||
| void TabChangedAt(content::WebContents* contents, | ||
| int index, | ||
| TabChangeType change_type) override; | ||
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| // BrowserTabStripTrackerDelegate: | ||
| bool ShouldTrackBrowser(Browser* browser) override; | ||
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| private: | ||
| State GetState(); | ||
| void NotifyListeners(); | ||
| void NotifyListener(mojom::TabListener* listener, State state); | ||
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| raw_ptr<content::WebContents> owner_contents_; | ||
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| mojo::Receiver<mojom::TabInformer> receiver_; | ||
| mojo::RemoteSet<mojom::TabListener> listeners_; | ||
| BrowserTabStripTracker tracker_{this, this}; | ||
| }; | ||
|
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| } // namespace ai_chat | ||
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| #endif // BRAVE_BROWSER_UI_AI_CHAT_TAB_INFORMER_H_ |
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