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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/clipboard/chrome_clipboard_permission_context_delegate.h"
#include <utility>
#include "base/containers/map_util.h"
#include "base/functional/bind.h"
#include "chrome/browser/profiles/profile.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/permissions/content_setting_permission_context_base.h"
#include "components/permissions/permission_decision.h"
#include "components/permissions/permission_request_id.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/permission_controller.h"
#include "content/public/browser/permission_descriptor_util.h"
#include "content/public/browser/render_frame_host.h"
#include "extensions/browser/guest_view/web_view/web_view_guest.h"
#include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
ChromeClipboardPermissionContextDelegate::
ChromeClipboardPermissionContextDelegate(Type type)
: type_(type) {}
ChromeClipboardPermissionContextDelegate::
~ChromeClipboardPermissionContextDelegate() = default;
bool ChromeClipboardPermissionContextDelegate::DecidePermission(
const permissions::PermissionRequestData& request_data,
permissions::BrowserPermissionCallback callback) {
content::RenderFrameHost* rfh = content::RenderFrameHost::FromID(
request_data.id.global_render_frame_host_id());
extensions::WebViewPermissionHelper* web_view_permission_helper =
extensions::WebViewPermissionHelper::FromRenderFrameHost(rfh);
if (!web_view_permission_helper) {
return false;
}
// Check embedder permission status to not allow to
// make clipboard actions if user has revoked the permission.
if (IsPermissionGrantedToWebView(rfh, web_view_permission_helper)) {
if (IsEmbedderPermissionGranted(web_view_permission_helper)) {
std::move(callback).Run(blink::mojom::PermissionStatus::GRANTED);
} else {
std::move(callback).Run(blink::mojom::PermissionStatus::DENIED);
}
} else {
base::OnceCallback<void(bool)> final_callback = base::BindOnce(
&ChromeClipboardPermissionContextDelegate::OnWebViewPermissionResult,
weak_factory_.GetWeakPtr(), std::move(callback), request_data.id);
switch (type_) {
case Type::kReadWrite:
web_view_permission_helper->RequestClipboardReadWritePermission(
request_data.requesting_origin, request_data.user_gesture,
std::move(final_callback));
break;
case Type::kSanitizedWrite:
web_view_permission_helper->RequestClipboardSanitizedWritePermission(
request_data.requesting_origin, std::move(final_callback));
break;
}
}
return true;
}
std::optional<ContentSetting>
ChromeClipboardPermissionContextDelegate::GetPermissionStatus(
content::RenderFrameHost* render_frame_host,
const GURL& requesting_origin_url) const {
extensions::WebViewPermissionHelper* web_view_permission_helper =
extensions::WebViewPermissionHelper::FromRenderFrameHost(
render_frame_host);
if (!web_view_permission_helper) {
return std::nullopt;
}
if (IsPermissionGrantedToWebView(render_frame_host,
web_view_permission_helper)) {
if (IsEmbedderPermissionGranted(web_view_permission_helper)) {
return ContentSetting::CONTENT_SETTING_ALLOW;
} else {
return ContentSetting::CONTENT_SETTING_BLOCK;
}
} else {
return ContentSetting::CONTENT_SETTING_ASK;
}
}
bool ChromeClipboardPermissionContextDelegate::IsEmbedderPermissionGranted(
extensions::WebViewPermissionHelper* web_view_permission_helper) const {
blink::PermissionType permission_type;
switch (type_) {
case Type::kReadWrite:
permission_type = blink::PermissionType::CLIPBOARD_READ_WRITE;
break;
case Type::kSanitizedWrite:
permission_type = blink::PermissionType::CLIPBOARD_SANITIZED_WRITE;
break;
}
content::RenderFrameHost* embedder_rfh =
web_view_permission_helper->web_view_guest()->embedder_rfh();
content::PermissionStatus permission_status =
embedder_rfh->GetBrowserContext()
->GetPermissionController()
->GetPermissionStatusForCurrentDocument(
content::PermissionDescriptorUtil::
CreatePermissionDescriptorForPermissionType(permission_type),
embedder_rfh);
return permission_status == content::PermissionStatus::GRANTED;
}
void ChromeClipboardPermissionContextDelegate::OnWebViewPermissionResult(
permissions::BrowserPermissionCallback callback,
permissions::PermissionRequestID request_id,
bool allowed) {
content::RenderFrameHost* rfh = content::RenderFrameHost::FromID(
request_id.global_render_frame_host_id());
if (!rfh) {
// The frame has gone away. Don't try to use it.
return;
}
extensions::WebViewPermissionHelper* web_view_permission_helper =
extensions::WebViewPermissionHelper::FromRenderFrameHost(rfh);
const url::Origin& embedder_origin =
web_view_permission_helper->web_view_guest()
->embedder_rfh()
->GetLastCommittedOrigin();
const url::Origin& requesting_origin = rfh->GetLastCommittedOrigin();
if (allowed) {
granted_permissions_[embedder_origin].insert(requesting_origin);
}
std::move(callback).Run(allowed ? blink::mojom::PermissionStatus::GRANTED
: blink::mojom::PermissionStatus::DENIED);
}
bool ChromeClipboardPermissionContextDelegate::IsPermissionGrantedToWebView(
content::RenderFrameHost* render_frame_host,
extensions::WebViewPermissionHelper* web_view_permission_helper) const {
content::RenderFrameHost* embedder_rfh =
web_view_permission_helper->web_view_guest()->embedder_rfh();
const url::Origin& embedder_origin = embedder_rfh->GetLastCommittedOrigin();
const url::Origin& requesting_origin =
render_frame_host->GetLastCommittedOrigin();
if (auto* permissions =
base::FindOrNull(granted_permissions_, embedder_origin)) {
return permissions->contains(requesting_origin);
}
return false;
}
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