2fad53e66b
* refactor: use v8 serialization for ipc * cloning process.env doesn't work * serialize host objects by enumerating key/values * new serialization can handle NaN, Infinity, and undefined correctly * can't allocate v8 objects during GC * backport microtasks fix * fix compile * fix node_stream_loader reentrancy * update subframe spec to expect undefined instead of null * write undefined instead of crashing when serializing host objects * fix webview spec * fix download spec * buffers are transformed into uint8arrays * can't serialize promises * fix chrome.i18n.getMessage * fix devtools tests * fix zoom test * fix debug build * fix lint * update ipcRenderer tests * fix printToPDF test * update patch * remove accidentally re-added remote-side spec * wip * don't attempt to serialize host objects * jump through different hoops to set options.webContents sometimes * whoops * fix lint * clean up error-handling logic * fix memory leak * fix lint * convert host objects using old base::Value serialization * fix lint more * fall back to base::Value-based serialization * remove commented-out code * add docs to breaking-changes.md * Update breaking-changes.md * update ipcRenderer and WebContents docs * lint * use named values for format tag * save a memcpy for ~30% speedup * get rid of calls to ShallowClone * extra debugging for paranoia * d'oh, use the correct named tags * apparently msstl doesn't like this DCHECK * funny story about that DCHECK * disable remote-related functions when enable_remote_module = false * nits * use EnableIf to disable remote methods in mojom * fix include * review comments
129 lines
4.3 KiB
C++
129 lines
4.3 KiB
C++
// Copyright (c) 2014 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#ifndef SHELL_BROWSER_API_EVENT_EMITTER_H_
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#define SHELL_BROWSER_API_EVENT_EMITTER_H_
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#include <utility>
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#include <vector>
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#include "base/optional.h"
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#include "content/public/browser/browser_thread.h"
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#include "electron/shell/common/api/api.mojom.h"
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#include "native_mate/wrappable.h"
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#include "shell/common/api/event_emitter_caller_deprecated.h"
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namespace content {
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class RenderFrameHost;
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}
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namespace mate {
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namespace internal {
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v8::Local<v8::Object> CreateJSEvent(
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v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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content::RenderFrameHost* sender,
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base::Optional<electron::mojom::ElectronBrowser::MessageSyncCallback>
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callback);
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v8::Local<v8::Object> CreateEmptyJSEvent(v8::Isolate* isolate);
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v8::Local<v8::Object> CreateCustomEvent(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::Object> event);
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v8::Local<v8::Object> CreateEventFromFlags(v8::Isolate* isolate, int flags);
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} // namespace internal
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// Provide helperers to emit event in JavaScript.
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template <typename T>
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class EventEmitter : public Wrappable<T> {
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public:
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typedef std::vector<v8::Local<v8::Value>> ValueArray;
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// Make the convinient methods visible:
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// https://isocpp.org/wiki/faq/templates#nondependent-name-lookup-members
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v8::Isolate* isolate() const { return Wrappable<T>::isolate(); }
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v8::Local<v8::Object> GetWrapper() const {
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return Wrappable<T>::GetWrapper();
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}
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v8::MaybeLocal<v8::Object> GetWrapper(v8::Isolate* isolate) const {
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return Wrappable<T>::GetWrapper(isolate);
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}
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// this.emit(name, event, args...);
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template <typename... Args>
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bool EmitCustomEvent(base::StringPiece name,
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v8::Local<v8::Object> event,
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Args&&... args) {
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return EmitWithEvent(
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name, internal::CreateCustomEvent(isolate(), GetWrapper(), event),
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std::forward<Args>(args)...);
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}
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// this.emit(name, new Event(flags), args...);
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template <typename... Args>
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bool EmitWithFlags(base::StringPiece name, int flags, Args&&... args) {
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return EmitCustomEvent(name,
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internal::CreateEventFromFlags(isolate(), flags),
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std::forward<Args>(args)...);
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}
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// this.emit(name, new Event(), args...);
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template <typename... Args>
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bool Emit(base::StringPiece name, Args&&... args) {
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return EmitWithSender(name, nullptr, base::nullopt,
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std::forward<Args>(args)...);
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}
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// this.emit(name, new Event(sender, message), args...);
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template <typename... Args>
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bool EmitWithSender(
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base::StringPiece name,
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content::RenderFrameHost* sender,
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base::Optional<electron::mojom::ElectronBrowser::InvokeCallback> callback,
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Args&&... args) {
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DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
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v8::Locker locker(isolate());
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v8::HandleScope handle_scope(isolate());
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v8::Local<v8::Object> wrapper = GetWrapper();
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if (wrapper.IsEmpty()) {
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return false;
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}
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v8::Local<v8::Object> event = internal::CreateJSEvent(
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isolate(), wrapper, sender, std::move(callback));
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return EmitWithEvent(name, event, std::forward<Args>(args)...);
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}
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protected:
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EventEmitter() {}
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private:
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// this.emit(name, event, args...);
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template <typename... Args>
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bool EmitWithEvent(base::StringPiece name,
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v8::Local<v8::Object> event,
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Args&&... args) {
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DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
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// It's possible that |this| will be deleted by EmitEvent, so save anything
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// we need from |this| before calling EmitEvent.
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auto* isolate = this->isolate();
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v8::Locker locker(isolate);
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v8::HandleScope handle_scope(isolate);
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auto context = isolate->GetCurrentContext();
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EmitEvent(isolate, GetWrapper(), name, event, std::forward<Args>(args)...);
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v8::Local<v8::Value> defaultPrevented;
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if (event->Get(context, StringToV8(isolate, "defaultPrevented"))
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.ToLocal(&defaultPrevented)) {
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return defaultPrevented->BooleanValue(isolate);
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}
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return false;
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}
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DISALLOW_COPY_AND_ASSIGN(EventEmitter);
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};
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} // namespace mate
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#endif // SHELL_BROWSER_API_EVENT_EMITTER_H_
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