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// Copyright 2015 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/dom_distiller/content/renderer/distiller_native_javascript.h"
#include <string>
#include "base/functional/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "components/dom_distiller/content/common/mojom/distiller_javascript_service.mojom.h"
#include "components/dom_distiller/core/distilled_page_prefs.h"
#include "components/dom_distiller/core/mojom/distilled_page_prefs.mojom.h"
#include "content/public/renderer/render_frame.h"
#include "gin/arguments.h"
#include "gin/function_template.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.h"
#include "third_party/blink/public/platform/scheduler/web_agent_group_scheduler.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "v8/include/v8.h"
namespace {
// These values should agree with those in distilled_page_prefs.cc.
const float kMinFontScale = 0.4f;
const float kMaxFontScale = 3.0f;
} // namespace
namespace dom_distiller {
DistillerNativeJavaScript::DistillerNativeJavaScript(
content::RenderFrame* render_frame)
: render_frame_(render_frame) {}
DistillerNativeJavaScript::~DistillerNativeJavaScript() = default;
void DistillerNativeJavaScript::StoreIntTheme(int int_theme) {
auto theme = static_cast<mojom::Theme>(int_theme);
if (!mojom::IsKnownEnumValue(theme))
return;
distiller_js_service_->HandleStoreThemePref(theme);
}
void DistillerNativeJavaScript::StoreIntFontFamily(int int_font_family) {
auto font_family = static_cast<mojom::FontFamily>(int_font_family);
if (!mojom::IsKnownEnumValue(font_family))
return;
distiller_js_service_->HandleStoreFontFamilyPref(font_family);
}
void DistillerNativeJavaScript::StoreFloatFontScaling(float float_font_scale) {
if (float_font_scale < kMinFontScale || float_font_scale > kMaxFontScale)
return;
distiller_js_service_->HandleStoreFontScalingPref(float_font_scale);
}
void DistillerNativeJavaScript::AddJavaScriptObjectToFrame(
v8::Local<v8::Context> context) {
v8::Isolate* isolate =
render_frame_->GetWebFrame()->GetAgentGroupScheduler()->Isolate();
v8::HandleScope handle_scope(isolate);
if (context.IsEmpty())
return;
v8::Context::Scope context_scope(context);
v8::Local<v8::Object> distiller_obj =
GetOrCreateDistillerObject(isolate, context);
EnsureServiceConnected();
BindFunctionToObject(
isolate, distiller_obj, "openSettings",
base::BindRepeating(
[](base::WeakPtr<DistillerNativeJavaScript> service) {
if (!service || !service->distiller_js_service_) {
return;
}
service->distiller_js_service_->HandleDistillerOpenSettingsCall();
},
weak_factory_.GetWeakPtr()));
BindFunctionToObject(
isolate, distiller_obj, "storeThemePref",
base::BindRepeating(&DistillerNativeJavaScript::StoreIntTheme,
weak_factory_.GetWeakPtr()));
BindFunctionToObject(
isolate, distiller_obj, "storeFontFamilyPref",
base::BindRepeating(&DistillerNativeJavaScript::StoreIntFontFamily,
weak_factory_.GetWeakPtr()));
BindFunctionToObject(
isolate, distiller_obj, "storeFontScalingPref",
base::BindRepeating(&DistillerNativeJavaScript::StoreFloatFontScaling,
weak_factory_.GetWeakPtr()));
}
template <typename Sig>
void DistillerNativeJavaScript::BindFunctionToObject(
v8::Isolate* isolate,
v8::Local<v8::Object> javascript_object,
const std::string& name,
const base::RepeatingCallback<Sig>& callback) {
v8::Local<v8::Context> context = isolate->GetCurrentContext();
// Get the isolate associated with this object.
javascript_object
->Set(context, gin::StringToSymbol(isolate, name),
gin::CreateFunctionTemplate(isolate, callback)
->GetFunction(context)
.ToLocalChecked())
.Check();
}
void DistillerNativeJavaScript::EnsureServiceConnected() {
if (!distiller_js_service_) {
render_frame_->GetBrowserInterfaceBroker().GetInterface(
distiller_js_service_.BindNewPipeAndPassReceiver());
}
}
v8::Local<v8::Object> GetOrCreateDistillerObject(
v8::Isolate* isolate,
v8::Local<v8::Context> context) {
v8::Local<v8::Object> global = context->Global();
v8::Local<v8::Object> distiller_obj;
v8::Local<v8::Value> distiller_value;
if (!global->Get(context, gin::StringToV8(isolate, "distiller"))
.ToLocal(&distiller_value) ||
!distiller_value->IsObject()) {
distiller_obj = v8::Object::New(isolate);
global
->Set(context, gin::StringToSymbol(isolate, "distiller"), distiller_obj)
.Check();
} else {
distiller_obj = v8::Local<v8::Object>::Cast(distiller_value);
}
return distiller_obj;
}
} // namespace dom_distiller
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