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// Copyright 2014 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.
#ifndef EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_
#define EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_
#include <memory>
#include <vector>
#include "extensions/common/constants.h"
#include "extensions/common/mojom/code_injection.mojom.h"
#include "extensions/common/mojom/css_origin.mojom-shared.h"
#include "extensions/common/mojom/injection_type.mojom-shared.h"
#include "extensions/common/mojom/run_location.mojom-shared.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/user_script.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_script_source.h"
class InjectionHost;
namespace blink {
class WebLocalFrame;
}
namespace extensions {
// The pseudo-delegate class for a ScriptInjection that provides all necessary
// information about how to inject the script, including what code to inject and
// when (run location), but without any injection logic.
class ScriptInjector {
public:
// The possible reasons for not injecting the script.
enum InjectFailureReason {
EXTENSION_REMOVED, // The extension was removed before injection.
NOT_ALLOWED, // The script is not allowed to inject.
WONT_INJECT // The injection won't inject because the user rejected
// (or just did not accept) the injection.
};
struct CSSSource {
blink::WebString code;
blink::WebStyleSheetKey key;
};
virtual ~ScriptInjector() {}
// Returns the script type of this particular injection.
virtual mojom::InjectionType script_type() const = 0;
// Returns true if the script is running inside a user gesture.
virtual bool IsUserGesture() const = 0;
// Returns the CSS origin of this injection.
virtual mojom::CSSOrigin GetCssOrigin() const = 0;
// Returns the type of CSS operation (addition or removal) that should be
// performed.
virtual mojom::CSSInjection::Operation GetCSSInjectionOperation() const = 0;
// Returns true if the script expects results.
virtual bool ExpectsResults() const = 0;
// Returns true if the script should inject JS source at the given
// |run_location|.
virtual bool ShouldInjectJs(
mojom::RunLocation run_location,
const std::set<std::string>& executing_scripts) const = 0;
// Returns true if the script should inject or remove CSS at the given
// |run_location|.
virtual bool ShouldInjectOrRemoveCss(
mojom::RunLocation run_location,
const std::set<std::string>& injected_stylesheets) const = 0;
// Returns true if the script should execute on the given |frame|.
virtual PermissionsData::PageAccess CanExecuteOnFrame(
const InjectionHost* injection_host,
blink::WebLocalFrame* web_frame,
int tab_id) = 0;
// Returns the javascript sources to inject at the given |run_location|.
// Only called if ShouldInjectJs() is true.
virtual std::vector<blink::WebScriptSource> GetJsSources(
mojom::RunLocation run_location,
std::set<std::string>* executing_scripts,
size_t* num_injected_js_scripts) const = 0;
// Returns the css to inject at the given |run_location|.
// Only called if ShouldInjectOrRemoveCss() is true.
virtual std::vector<CSSSource> GetCssSources(
mojom::RunLocation run_location,
std::set<std::string>* injected_stylesheets,
size_t* num_injected_stylesheets) const = 0;
// Notifies the script that injection has completed, with a possibly-populated
// list of results (depending on whether or not ExpectsResults() was true).
virtual void OnInjectionComplete(
std::unique_ptr<base::Value> execution_result,
mojom::RunLocation run_location) = 0;
// Notifies the script that injection will never occur.
virtual void OnWillNotInject(InjectFailureReason reason) = 0;
};
} // namespace extensions
#endif // EXTENSIONS_RENDERER_SCRIPT_INJECTOR_H_
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