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// Copyright 2022 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/extensions/api/pdf_viewer_private/pdf_viewer_private_api.h"
#include <cmath>
#include "base/memory/weak_ptr.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/pdf/pdf_pref_names.h"
#include "chrome/browser/pdf/pdf_viewer_stream_manager.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/extensions/api/pdf_viewer_private.h"
#include "chrome/common/pref_names.h"
#include "components/pdf/common/constants.h"
#include "components/prefs/pref_service.h"
#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
#include "url/url_constants.h"
namespace extensions {
namespace {
namespace IsAllowedLocalFileAccess =
api::pdf_viewer_private::IsAllowedLocalFileAccess;
namespace SetPdfPluginAttributes =
api::pdf_viewer_private::SetPdfPluginAttributes;
namespace SetPdfDocumentTitle = api::pdf_viewer_private::SetPdfDocumentTitle;
// Check if the current URL is allowed based on a list of allowlisted domains.
bool IsUrlAllowedToEmbedLocalFiles(
const GURL& current_url,
const base::Value::List& allowlisted_domains) {
if (!current_url.is_valid() || !current_url.SchemeIs(url::kHttpsScheme)) {
return false;
}
for (auto const& value : allowlisted_domains) {
const std::string* domain = value.GetIfString();
if (!domain) {
continue;
}
if (current_url.DomainIs(*domain)) {
return true;
}
}
return false;
}
// Get the `StreamContainer` associated with the `extension_host`.
base::WeakPtr<StreamContainer> GetStreamContainer(
content::RenderFrameHost* extension_host) {
content::RenderFrameHost* embedder_host = extension_host->GetParent();
if (!embedder_host) {
return nullptr;
}
auto* pdf_viewer_stream_manager =
pdf::PdfViewerStreamManager::FromRenderFrameHost(embedder_host);
if (!pdf_viewer_stream_manager) {
return nullptr;
}
return pdf_viewer_stream_manager->GetStreamContainer(embedder_host);
}
} // namespace
PdfViewerPrivateGetStreamInfoFunction::PdfViewerPrivateGetStreamInfoFunction() =
default;
PdfViewerPrivateGetStreamInfoFunction::
~PdfViewerPrivateGetStreamInfoFunction() = default;
ExtensionFunction::ResponseAction PdfViewerPrivateGetStreamInfoFunction::Run() {
base::WeakPtr<StreamContainer> stream =
GetStreamContainer(render_frame_host());
if (!stream) {
return RespondNow(Error("Failed to get StreamContainer"));
}
api::pdf_viewer_private::StreamInfo stream_info;
stream_info.original_url = stream->original_url().spec();
stream_info.stream_url = stream->stream_url().spec();
stream_info.tab_id = stream->tab_id();
stream_info.embedded = stream->embedded();
return RespondNow(WithArguments(stream_info.ToValue()));
}
PdfViewerPrivateIsAllowedLocalFileAccessFunction::
PdfViewerPrivateIsAllowedLocalFileAccessFunction() = default;
PdfViewerPrivateIsAllowedLocalFileAccessFunction::
~PdfViewerPrivateIsAllowedLocalFileAccessFunction() = default;
ExtensionFunction::ResponseAction
PdfViewerPrivateIsAllowedLocalFileAccessFunction::Run() {
std::optional<IsAllowedLocalFileAccess::Params> params =
IsAllowedLocalFileAccess::Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params);
PrefService* prefs =
Profile::FromBrowserContext(browser_context())->GetPrefs();
return RespondNow(WithArguments(IsUrlAllowedToEmbedLocalFiles(
GURL(params->url),
prefs->GetList(prefs::kPdfLocalFileAccessAllowedForDomains))));
}
PdfViewerPrivateSetPdfDocumentTitleFunction::
PdfViewerPrivateSetPdfDocumentTitleFunction() = default;
PdfViewerPrivateSetPdfDocumentTitleFunction::
~PdfViewerPrivateSetPdfDocumentTitleFunction() = default;
// This function is only called for full-page PDFs.
ExtensionFunction::ResponseAction
PdfViewerPrivateSetPdfDocumentTitleFunction::Run() {
content::WebContents* web_contents = GetSenderWebContents();
if (!web_contents) {
return RespondNow(Error("Could not find a valid web contents."));
}
// Title should only be set for full-page PDFs.
// MIME type associated with sender `WebContents` must be `application/pdf`
// for a full-page PDF.
EXTENSION_FUNCTION_VALIDATE(web_contents->GetContentsMimeType() ==
pdf::kPDFMimeType);
std::optional<SetPdfDocumentTitle::Params> params =
SetPdfDocumentTitle::Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params);
web_contents->UpdateTitleForEntry(
web_contents->GetController().GetLastCommittedEntry(),
base::UTF8ToUTF16(params->title));
return RespondNow(NoArguments());
}
PdfViewerPrivateSetPdfPluginAttributesFunction::
PdfViewerPrivateSetPdfPluginAttributesFunction() = default;
PdfViewerPrivateSetPdfPluginAttributesFunction::
~PdfViewerPrivateSetPdfPluginAttributesFunction() = default;
ExtensionFunction::ResponseAction
PdfViewerPrivateSetPdfPluginAttributesFunction::Run() {
std::optional<SetPdfPluginAttributes::Params> params =
SetPdfPluginAttributes::Params::Create(args());
EXTENSION_FUNCTION_VALIDATE(params);
base::WeakPtr<StreamContainer> stream =
GetStreamContainer(render_frame_host());
if (!stream) {
return RespondNow(Error("Failed to get StreamContainer"));
}
const api::pdf_viewer_private::PdfPluginAttributes& attributes =
params->attributes;
// Check the `background_color` is an integer.
double whole = 0.0;
if (std::modf(attributes.background_color, &whole) != 0.0) {
return RespondNow(Error("Background color is not an integer"));
}
// Check the `background_color` is within the range of a uint32_t.
if (!base::IsValueInRangeForNumericType<uint32_t>(
attributes.background_color)) {
return RespondNow(Error("Background color out of bounds"));
}
stream->set_pdf_plugin_attributes(mime_handler::PdfPluginAttributes::New(
/*background_color=*/attributes.background_color,
/*allow_javascript=*/attributes.allow_javascript));
return RespondNow(NoArguments());
}
} // namespace extensions
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