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cef/libcef/renderer/blink_glue.cc

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// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "libcef/renderer/blink_glue.h"
#include "third_party/blink/public/mojom/v8_cache_options.mojom-blink.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/platform/web_url_response.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_element.h"
#include "third_party/blink/public/web/web_local_frame_client.h"
#include "third_party/blink/public/web/web_node.h"
#include "third_party/blink/public/web/web_view_client.h"
#include "third_party/blink/renderer/bindings/core/v8/sanitize_script_errors.h"
#include "third_party/blink/renderer/bindings/core/v8/script_evaluation_result.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/editing/serializers/serialization.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_state_observer.h"
#include "third_party/blink/renderer/core/exported/web_view_impl.h"
#include "third_party/blink/renderer/core/frame/frame_owner.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/core/loader/frame_load_request.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/script/classic_script.h"
#include "third_party/blink/renderer/platform/bindings/script_forbidden_scope.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_response.h"
#include "third_party/blink/renderer/platform/loader/fetch/script_fetch_options.h"
#include "third_party/blink/renderer/platform/weborigin/scheme_registry.h"
#undef LOG
#include "base/logging.h"
namespace blink_glue {
namespace {
blink::ExecutionContext* GetExecutionContext(v8::Local<v8::Context> context) {
blink::LocalFrame* frame = blink::ToLocalFrameIfNotDetached(context);
if (frame &&
frame->DomWindow()->CanExecuteScripts(blink::kAboutToExecuteScript)) {
return frame->GetDocument()->GetExecutionContext();
}
return nullptr;
}
} // namespace
bool CanGoBack(blink::WebView* view) {
if (!view) {
return false;
}
return view->HistoryBackListCount() > 0;
}
bool CanGoForward(blink::WebView* view) {
if (!view) {
return false;
}
return view->HistoryForwardListCount() > 0;
}
void GoBack(blink::WebView* view) {
if (!view) {
return;
}
blink::WebFrame* main_frame = view->MainFrame();
if (main_frame && main_frame->IsWebLocalFrame()) {
if (view->HistoryBackListCount() > 0) {
blink::Frame* core_frame = blink::WebFrame::ToCoreFrame(*main_frame);
blink::To<blink::LocalFrame>(core_frame)
->GetLocalFrameHostRemote()
.GoToEntryAtOffset(-1, /*has_user_gesture=*/true, std::nullopt);
}
}
}
void GoForward(blink::WebView* view) {
if (!view) {
return;
}
blink::WebFrame* main_frame = view->MainFrame();
if (main_frame && main_frame->IsWebLocalFrame()) {
if (view->HistoryForwardListCount() > 0) {
blink::Frame* core_frame = blink::WebFrame::ToCoreFrame(*main_frame);
blink::To<blink::LocalFrame>(core_frame)
->GetLocalFrameHostRemote()
.GoToEntryAtOffset(1, /*has_user_gesture=*/true, std::nullopt);
}
}
}
bool IsInBackForwardCache(blink::WebLocalFrame* frame) {
blink::Frame* core_frame = blink::WebFrame::ToCoreFrame(*frame);
return blink::To<blink::LocalFrame>(core_frame)
->GetPage()
->GetPageScheduler()
->IsInBackForwardCache();
}
blink::WebString DumpDocumentText(blink::WebLocalFrame* frame) {
// We use the document element's text instead of the body text here because
// not all documents have a body, such as XML documents.
blink::WebElement document_element = frame->GetDocument().DocumentElement();
if (document_element.IsNull()) {
return blink::WebString();
}
blink::Element* web_element = document_element.Unwrap<blink::Element>();
return blink::WebString(web_element->innerText());
}
blink::WebString DumpDocumentMarkup(blink::WebLocalFrame* frame) {
return blink::CreateMarkup(
blink::To<blink::WebLocalFrameImpl>(frame)->GetFrame()->GetDocument());
}
cef_dom_node_type_t GetNodeType(const blink::WebNode& node) {
const blink::Node* web_node = node.ConstUnwrap<blink::Node>();
switch (web_node->getNodeType()) {
case blink::Node::kElementNode:
return DOM_NODE_TYPE_ELEMENT;
case blink::Node::kAttributeNode:
return DOM_NODE_TYPE_ATTRIBUTE;
case blink::Node::kTextNode:
return DOM_NODE_TYPE_TEXT;
case blink::Node::kCdataSectionNode:
return DOM_NODE_TYPE_CDATA_SECTION;
case blink::Node::kProcessingInstructionNode:
return DOM_NODE_TYPE_PROCESSING_INSTRUCTIONS;
case blink::Node::kCommentNode:
return DOM_NODE_TYPE_COMMENT;
case blink::Node::kDocumentNode:
return DOM_NODE_TYPE_DOCUMENT;
case blink::Node::kDocumentTypeNode:
return DOM_NODE_TYPE_DOCUMENT_TYPE;
case blink::Node::kDocumentFragmentNode:
return DOM_NODE_TYPE_DOCUMENT_FRAGMENT;
}
return DOM_NODE_TYPE_UNSUPPORTED;
}
blink::WebString GetNodeName(const blink::WebNode& node) {
const blink::Node* web_node = node.ConstUnwrap<blink::Node>();
return web_node->nodeName();
}
blink::WebString CreateNodeMarkup(const blink::WebNode& node) {
const blink::Node* web_node = node.ConstUnwrap<blink::Node>();
return blink::CreateMarkup(web_node);
}
bool SetNodeValue(blink::WebNode& node, const blink::WebString& value) {
blink::Node* web_node = node.Unwrap<blink::Node>();
web_node->setNodeValue(value);
return true;
}
v8::MaybeLocal<v8::Value> CallV8Function(v8::Local<v8::Context> context,
v8::Local<v8::Function> function,
v8::Local<v8::Object> receiver,
int argc,
v8::Local<v8::Value> args[],
v8::Isolate* isolate) {
v8::MaybeLocal<v8::Value> func_rv;
// Execute the function call using the V8ScriptRunner so that inspector
// instrumentation works.
if (auto execution_context = GetExecutionContext(context)) {
func_rv = blink::V8ScriptRunner::CallFunction(
function, execution_context, receiver, argc, args, isolate);
}
return func_rv;
}
bool IsTextControlElement(const blink::WebElement& element) {
const blink::Element* web_element = element.ConstUnwrap<blink::Element>();
return web_element->IsTextControl();
}
v8::Local<v8::Value> ExecuteV8ScriptAndReturnValue(
const blink::WebString& source,
const blink::WebString& source_url,
int start_line,
v8::Local<v8::Context> context,
v8::TryCatch& tryCatch) {
if (start_line < 1) {
start_line = 1;
}
blink::LocalFrame* frame = blink::ToLocalFrameIfNotDetached(context);
if (!frame) {
return v8::Local<v8::Value>();
}
auto* script = blink::ClassicScript::Create(
source, blink::KURL(source_url), blink::KURL(source_url),
blink::ScriptFetchOptions(), blink::ScriptSourceLocationType::kInternal,
blink::SanitizeScriptErrors::kDoNotSanitize, /*cache_handler=*/nullptr,
WTF::TextPosition(WTF::OrdinalNumber::FromOneBasedInt(start_line),
WTF::OrdinalNumber::FromZeroBasedInt(0)));
// The Rethrow() message is unused due to kDoNotSanitize but it still needs
// to be non-nullopt for exceptions to be re-thrown as expected.
auto result = blink::V8ScriptRunner::CompileAndRunScript(
blink::ScriptState::From(context), script,
blink::ExecuteScriptPolicy::kExecuteScriptWhenScriptsDisabled,
blink::V8ScriptRunner::RethrowErrorsOption::Rethrow(""));
if (result.GetResultType() ==
blink::ScriptEvaluationResult::ResultType::kSuccess) {
return result.GetSuccessValue();
}
DCHECK(tryCatch.HasCaught());
return v8::Local<v8::Value>();
}
v8::MicrotaskQueue* GetMicrotaskQueue(v8::Local<v8::Context> context) {
if (auto execution_context = GetExecutionContext(context)) {
return execution_context->GetMicrotaskQueue();
}
return nullptr;
}
bool IsScriptForbidden() {
return blink::ScriptForbiddenScope::IsScriptForbidden();
}
std::unique_ptr<CefObserverRegistration>
RegisterExecutionContextLifecycleStateObserver(
v8::Local<v8::Context> context,
CefExecutionContextLifecycleStateObserver* observer) {
class Observer : public blink::GarbageCollected<Observer>,
public blink::ExecutionContextLifecycleStateObserver {
public:
Observer(blink::ExecutionContext* execution_context,
CefExecutionContextLifecycleStateObserver* observer)
: blink::ExecutionContextLifecycleStateObserver(execution_context),
observer_(observer) {
UpdateStateIfNeeded();
}
void ContextLifecycleStateChanged(
blink::mojom::blink::FrameLifecycleState state) override {
observer_->ContextLifecycleStateChanged(state);
}
void ContextDestroyed() override {}
private:
CefExecutionContextLifecycleStateObserver* observer_;
};
class Registration : public CefObserverRegistration {
public:
explicit Registration(blink::Persistent<Observer> observer)
: observer_(observer) {}
private:
blink::Persistent<Observer> observer_;
};
return std::make_unique<Registration>(blink::MakeGarbageCollected<Observer>(
blink::ExecutionContext::From(context), observer));
}
void RegisterURLSchemeAsSupportingFetchAPI(const blink::WebString& scheme) {
blink::SchemeRegistry::RegisterURLSchemeAsSupportingFetchAPI(scheme);
}
struct CefScriptForbiddenScope::Impl {
blink::ScriptForbiddenScope scope_;
};
CefScriptForbiddenScope::CefScriptForbiddenScope() : impl_(new Impl()) {}
CefScriptForbiddenScope::~CefScriptForbiddenScope() = default;
bool ResponseWasCached(const blink::WebURLResponse& response) {
return response.ToResourceResponse().WasCached();
}
bool HasPluginFrameOwner(blink::WebLocalFrame* frame) {
blink::Frame* core_frame = blink::WebFrame::ToCoreFrame(*frame);
return core_frame->Owner() && core_frame->Owner()->IsPlugin();
}
// Based on WebLocalFrameImpl::StartNavigation which was removed in
// https://crrev.com/de4fc2a5fe.
void StartNavigation(blink::WebLocalFrame* frame,
const blink::WebURLRequest& request) {
DCHECK(!request.IsNull());
DCHECK(!request.Url().ProtocolIs("javascript"));
blink::FrameLoadRequest frame_load_request(nullptr,
request.ToResourceRequest());
blink::Frame* core_frame = blink::WebFrame::ToCoreFrame(*frame);
blink::To<blink::LocalFrame>(core_frame)
->Loader()
.StartNavigation(frame_load_request, blink::WebFrameLoadType::kStandard);
}
} // namespace blink_glue
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