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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/pdf/browser/pdf_frame_util.h"
#include <functional>
#include "base/check.h"
#include "base/functional/bind.h"
#include "components/pdf/common/constants.h"
#include "components/pdf/common/pdf_util.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "pdf/pdf_features.h"
namespace pdf_frame_util {
content::RenderFrameHost* FindFullPagePdfExtensionHost(
content::WebContents* contents) {
CHECK(chrome_pdf::features::IsOopifPdfEnabled());
// MIME type associated with `contents` must be `application/pdf` for a
// full-page PDF.
if (contents->GetContentsMimeType() != pdf::kPDFMimeType) {
return nullptr;
}
// A full-page PDF embedder host should have a child PDF extension host.
content::RenderFrameHost* extension_host = nullptr;
contents->GetPrimaryMainFrame()->ForEachRenderFrameHostWithAction(
[&extension_host](content::RenderFrameHost* child_host) {
content::RenderFrameHost* parent_host = child_host->GetParent();
// Don't descend past the first level of children (extension frame must
// be a direct child to main frame).
if (parent_host && !parent_host->IsInPrimaryMainFrame()) {
return content::RenderFrameHost::FrameIterationAction::kSkipChildren;
}
if (IsPdfExtensionOrigin(child_host->GetLastCommittedOrigin())) {
CHECK(!extension_host);
extension_host = child_host;
}
return content::RenderFrameHost::FrameIterationAction::kContinue;
});
return extension_host;
}
content::RenderFrameHost* FindPdfChildFrame(
content::RenderFrameHost* extension_host) {
if (!IsPdfExtensionOrigin(extension_host->GetLastCommittedOrigin())) {
return nullptr;
}
content::RenderFrameHost* pdf_rfh = nullptr;
extension_host->ForEachRenderFrameHost(
[&pdf_rfh](content::RenderFrameHost* rfh) {
if (!rfh->GetProcess()->IsPdf()) {
return;
}
CHECK(IsPdfExtensionOrigin(rfh->GetParent()->GetLastCommittedOrigin()));
CHECK(!pdf_rfh);
pdf_rfh = rfh;
});
return pdf_rfh;
}
content::RenderFrameHost* GetEmbedderHost(
content::RenderFrameHost* content_host) {
CHECK(chrome_pdf::features::IsOopifPdfEnabled());
if (!content_host) {
return nullptr;
}
content::RenderFrameHost* extension_host = content_host->GetParent();
if (!extension_host ||
!IsPdfExtensionOrigin(extension_host->GetLastCommittedOrigin())) {
return nullptr;
}
return extension_host->GetParent();
}
} // namespace pdf_frame_util
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