зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.4 KiB
C++
105 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_timeout_handler_h
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#define mozilla_dom_timeout_handler_h
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#include "nsCOMPtr.h"
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#include "nsIGlobalObject.h"
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#include "nsISupports.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsString.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/dom/FunctionBinding.h"
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namespace mozilla::dom {
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/**
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* Utility class for implementing nsITimeoutHandlers, designed to be subclassed.
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*/
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class TimeoutHandler : public nsISupports {
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public:
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MOZ_CAN_RUN_SCRIPT virtual bool Call(const char* /* unused */);
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// Get the location of the script.
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// Note: The memory pointed to by aFileName is owned by the
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// nsITimeoutHandler and should not be freed by the caller.
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virtual void GetLocation(const char** aFileName, uint32_t* aLineNo,
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uint32_t* aColumn);
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// Append a UTF-8 string to aOutString that describes the callback function,
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// for use in logging or profiler markers.
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// The string contains the function name and its source location, if
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// available, in the following format:
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// "<functionName> (<sourceURL>:<lineNumber>:<columnNumber>)"
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virtual void GetDescription(nsACString& aOutString);
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virtual void MarkForCC() {}
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protected:
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TimeoutHandler() : mFileName(""), mLineNo(0), mColumn(0) {}
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explicit TimeoutHandler(JSContext* aCx);
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virtual ~TimeoutHandler() = default;
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// filename, line number and JS language version string of the
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// caller of setTimeout()
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nsCString mFileName;
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uint32_t mLineNo;
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uint32_t mColumn;
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private:
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TimeoutHandler(const TimeoutHandler&) = delete;
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TimeoutHandler& operator=(const TimeoutHandler&) = delete;
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TimeoutHandler& operator=(const TimeoutHandler&&) = delete;
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};
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class ScriptTimeoutHandler : public TimeoutHandler {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS(ScriptTimeoutHandler)
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ScriptTimeoutHandler(JSContext* aCx, nsIGlobalObject* aGlobal,
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const nsAString& aExpression);
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MOZ_CAN_RUN_SCRIPT virtual bool Call(const char* /* unused */) override {
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return false;
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};
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virtual void GetDescription(nsACString& aOutString) override;
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protected:
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virtual ~ScriptTimeoutHandler() = default;
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nsCOMPtr<nsIGlobalObject> mGlobal;
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// The expression to evaluate or function to call. If mFunction is non-null
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// it should be used, else use mExpr.
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nsString mExpr;
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};
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class CallbackTimeoutHandler final : public TimeoutHandler {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(CallbackTimeoutHandler)
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CallbackTimeoutHandler(JSContext* aCx, nsIGlobalObject* aGlobal,
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Function* aFunction,
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nsTArray<JS::Heap<JS::Value>>&& aArguments);
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MOZ_CAN_RUN_SCRIPT virtual bool Call(const char* aExecutionReason) override;
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virtual void MarkForCC() override;
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virtual void GetDescription(nsACString& aOutString) override;
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void ReleaseJSObjects();
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private:
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virtual ~CallbackTimeoutHandler() { ReleaseJSObjects(); }
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nsCOMPtr<nsIGlobalObject> mGlobal;
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RefPtr<Function> mFunction;
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nsTArray<JS::Heap<JS::Value>> mArgs;
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};
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} // namespace mozilla::dom
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#endif // mozilla_dom_timeout_handler_h
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