Долгое время скрывался, но рад быть здесь. Я пытаюсь привязать базовую привязку javascript к приложению cefSimple.
Я работаю над современным Macbook и современным iMac.
Многочисленные поиски привели к некоторым основным ошибкам, которые я делал, но я, кажется, исправил их все, и это все еще работает.
В частности, я убедился, что мой класс SimpleApp наследуется от CefRenderProcessHandler (по крайней мере, яЯ думаю, что в этом классе я также вызвал GetRenderProcessHandler.
Другое основное предложение, которое я видел, - это обязательно пройтиэкземпляр SimpleApp для CefExecuteProcess, который я сделал.
Вот мой код:
simple_app.mm
// Copyright (c) 2013 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2010 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.
#import <Cocoa/Cocoa.h>
#include "include/cef_application_mac.h"
#include "include/wrapper/cef_helpers.h"
#include "include/wrapper/cef_library_loader.h"
#include "tests/cefsimple/simple_app.h"
#include "tests/cefsimple/simple_handler.h"
// Receives notifications from the application.
@interface SimpleAppDelegate : NSObject <NSApplicationDelegate>
- (void)createApplication:(id)object;
- (void)tryToTerminateApplication:(NSApplication*)app;
@end
// Provide the CefAppProtocol implementation required by CEF.
@interface SimpleApplication : NSApplication <CefAppProtocol> {
@private
BOOL handlingSendEvent_;
}
@end
@implementation SimpleApplication
- (BOOL)isHandlingSendEvent {
return handlingSendEvent_;
}
- (void)setHandlingSendEvent:(BOOL)handlingSendEvent {
handlingSendEvent_ = handlingSendEvent;
}
- (void)sendEvent:(NSEvent*)event {
CefScopedSendingEvent sendingEventScoper;
[super sendEvent:event];
}
// |-terminate:| is the entry point for orderly "quit" operations in Cocoa. This
// includes the application menu's quit menu item and keyboard equivalent, the
// application's dock icon menu's quit menu item, "quit" (not "force quit") in
// the Activity Monitor, and quits triggered by user logout and system restart
// and shutdown.
//
// The default |-terminate:| implementation ends the process by calling exit(),
// and thus never leaves the main run loop. This is unsuitable for Chromium
// since Chromium depends on leaving the main run loop to perform an orderly
// shutdown. We support the normal |-terminate:| interface by overriding the
// default implementation. Our implementation, which is very specific to the
// needs of Chromium, works by asking the application delegate to terminate
// using its |-tryToTerminateApplication:| method.
//
// |-tryToTerminateApplication:| differs from the standard
// |-applicationShouldTerminate:| in that no special event loop is run in the
// case that immediate termination is not possible (e.g., if dialog boxes
// allowing the user to cancel have to be shown). Instead, this method tries to
// close all browsers by calling CloseBrowser(false) via
// ClientHandler::CloseAllBrowsers. Calling CloseBrowser will result in a call
// to ClientHandler::DoClose and execution of |-performClose:| on the NSWindow.
// DoClose sets a flag that is used to differentiate between new close events
// (e.g., user clicked the window close button) and in-progress close events
// (e.g., user approved the close window dialog). The NSWindowDelegate
// |-windowShouldClose:| method checks this flag and either calls
// CloseBrowser(false) in the case of a new close event or destructs the
// NSWindow in the case of an in-progress close event.
// ClientHandler::OnBeforeClose will be called after the CEF NSView hosted in
// the NSWindow is dealloc'ed.
//
// After the final browser window has closed ClientHandler::OnBeforeClose will
// begin actual tear-down of the application by calling CefQuitMessageLoop.
// This ends the NSApplication event loop and execution then returns to the
// main() function for cleanup before application termination.
//
// The standard |-applicationShouldTerminate:| is not supported, and code paths
// leading to it must be redirected.
- (void)terminate:(id)sender {
SimpleAppDelegate* delegate =
static_cast<SimpleAppDelegate*>([NSApp delegate]);
[delegate tryToTerminateApplication:self];
// Return, don't exit. The application is responsible for exiting on its own.
}
@end
@implementation SimpleAppDelegate
// Create the application on the UI thread.
- (void)createApplication:(id)object {
[NSApplication sharedApplication];
[[NSBundle mainBundle] loadNibNamed:@"MainMenu"
owner:NSApp
topLevelObjects:nil];
// Set the delegate for application events.
[[NSApplication sharedApplication] setDelegate:self];
}
- (void)tryToTerminateApplication:(NSApplication*)app {
SimpleHandler* handler = SimpleHandler::GetInstance();
if (handler && !handler->IsClosing())
handler->CloseAllBrowsers(false);
}
- (NSApplicationTerminateReply)applicationShouldTerminate:
(NSApplication*)sender {
return NSTerminateNow;
}
@end
// Entry point function for the browser process.
int main(int argc, char* argv[]) {
// Load the CEF framework library at runtime instead of linking directly
// as required by the macOS sandbox implementation.
CefScopedLibraryLoader library_loader;
if (!library_loader.LoadInMain())
return 1;
// Provide CEF with command-line arguments.
CefMainArgs main_args(argc, argv);
@autoreleasepool {
// Initialize the SimpleApplication instance.
[SimpleApplication sharedApplication];
// Specify CEF global settings here.
CefSettings settings;
// When generating projects with CMake the CEF_USE_SANDBOX value will be
// defined automatically. Pass -DUSE_SANDBOX=OFF to the CMake command-line
// to disable use of the sandbox.
#if !defined(CEF_USE_SANDBOX)
settings.no_sandbox = true;
#endif
// SimpleApp implements application-level callbacks for the browser process.
// It will create the first browser instance in OnContextInitialized() after
// CEF has initialized.
CefRefPtr<SimpleApp> app(new SimpleApp);
// CEF applications have multiple sub-processes (render, plugin, GPU, etc)
// that share the same executable. This function checks the command-line and,
// if this is a sub-process, executes the appropriate logic.
CefExecuteProcess(main_args, app, nullptr);
// Initialize CEF for the browser process.
CefInitialize(main_args, settings, app.get(), NULL);
// Create the application delegate.
NSObject* delegate = [[SimpleAppDelegate alloc] init];
[delegate performSelectorOnMainThread:@selector(createApplication:)
withObject:nil
waitUntilDone:NO];
// Run the CEF message loop. This will block until CefQuitMessageLoop() is
// called.
CefRunMessageLoop();
// Shut down CEF.
CefShutdown();
// Release the delegate.
#if !__has_feature(objc_arc)
[delegate release];
#endif // !__has_feature(objc_arc)
delegate = nil;
} // @autoreleasepool
return 0;
}
simple_app.h
// Copyright (c) 2013 The Chromium Embedded Framework 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 CEF_TESTS_CEFSIMPLE_SIMPLE_APP_H_
#define CEF_TESTS_CEFSIMPLE_SIMPLE_APP_H_
#include "include/cef_app.h"
// Implement application-level callbacks for the browser process.
class SimpleApp : public CefApp,
public CefBrowserProcessHandler,
public CefRenderProcessHandler {
public:
SimpleApp();
// CefApp methods:
virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler()
OVERRIDE {
return this;
}
virtual CefRefPtr<CefRenderProcessHandler> GetRenderProcessHandler()
OVERRIDE {
return this;
}
// CefBrowserProcessHandler methods:
virtual void OnContextInitialized() OVERRIDE;
virtual void OnContextCreated(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefV8Context> context) OVERRIDE;
private:
// Include the default reference counting implementation.
IMPLEMENT_REFCOUNTING(SimpleApp);
};
#endif // CEF_TESTS_CEFSIMPLE_SIMPLE_APP_H_
simple_app.cc
// Copyright (c) 2013 The Chromium Embedded Framework 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 "tests/cefsimple/simple_app.h"
#include <string>
#include "include/cef_browser.h"
#include "include/cef_command_line.h"
#include "include/views/cef_browser_view.h"
#include "include/views/cef_window.h"
#include "include/wrapper/cef_helpers.h"
#include "tests/cefsimple/simple_handler.h"
namespace {
// When using the Views framework this object provides the delegate
// implementation for the CefWindow that hosts the Views-based browser.
class SimpleWindowDelegate : public CefWindowDelegate {
public:
explicit SimpleWindowDelegate(CefRefPtr<CefBrowserView> browser_view)
: browser_view_(browser_view) {}
void OnWindowCreated(CefRefPtr<CefWindow> window) OVERRIDE {
// Add the browser view and show the window.
window->AddChildView(browser_view_);
window->Show();
// Give keyboard focus to the browser view.
browser_view_->RequestFocus();
}
void OnWindowDestroyed(CefRefPtr<CefWindow> window) OVERRIDE {
browser_view_ = NULL;
}
bool CanClose(CefRefPtr<CefWindow> window) OVERRIDE {
// Allow the window to close if the browser says it's OK.
CefRefPtr<CefBrowser> browser = browser_view_->GetBrowser();
if (browser)
return browser->GetHost()->TryCloseBrowser();
return true;
}
CefSize GetPreferredSize(CefRefPtr<CefView> view) OVERRIDE {
return CefSize(800, 600);
}
private:
CefRefPtr<CefBrowserView> browser_view_;
IMPLEMENT_REFCOUNTING(SimpleWindowDelegate);
DISALLOW_COPY_AND_ASSIGN(SimpleWindowDelegate);
};
} // namespace
SimpleApp::SimpleApp() {}
void SimpleApp::OnContextInitialized() {
CEF_REQUIRE_UI_THREAD();
CefRefPtr<CefCommandLine> command_line =
CefCommandLine::GetGlobalCommandLine();
#if defined(OS_WIN) || defined(OS_LINUX)
// Create the browser using the Views framework if "--use-views" is specified
// via the command-line. Otherwise, create the browser using the native
// platform framework. The Views framework is currently only supported on
// Windows and Linux.
const bool use_views = command_line->HasSwitch("use-views");
#else
const bool use_views = false;
#endif
// SimpleHandler implements browser-level callbacks.
CefRefPtr<SimpleHandler> handler(new SimpleHandler(use_views));
// Specify CEF browser settings here.
CefBrowserSettings browser_settings;
std::string url;
// Check if a "--url=" value was provided via the command-line. If so, use
// that instead of the default URL.
url = command_line->GetSwitchValue("url");
if (url.empty())
url = "http://www.google.com";
if (use_views) {
// Create the BrowserView.
CefRefPtr<CefBrowserView> browser_view = CefBrowserView::CreateBrowserView(
handler, url, browser_settings, NULL, NULL, NULL);
// Create the Window. It will show itself after creation.
CefWindow::CreateTopLevelWindow(new SimpleWindowDelegate(browser_view));
} else {
// Information used when creating the native window.
CefWindowInfo window_info;
#if defined(OS_WIN)
// On Windows we need to specify certain flags that will be passed to
// CreateWindowEx().
window_info.SetAsPopup(NULL, "cefsimple");
#endif
// Create the first browser window.
CefBrowserHost::CreateBrowser(window_info, handler, url, browser_settings,
NULL, NULL);
}
}
void SimpleApp::OnContextCreated(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefV8Context> context) {
// Retrieve the context's window object.
CefRefPtr<CefV8Value> object = context->GetGlobal();
// Create a new V8 string value. See the "Basic JS Types" section below.
CefRefPtr<CefV8Value> str = CefV8Value::CreateString("My Value!");
// Add the string to the window object as "window.myval". See the "JS Objects" section below.
object->SetValue("myval", str, V8_PROPERTY_ATTRIBUTE_NONE);
}
И, конечно, HTML, чтобы проверить, работает ли он.
CEFTest.html
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<span id="thespan"></span>
<script type="text/javascript">
function SetValue(argument) {
document.getElementById( 'thespan' ).innerHTML = window.myval + 'hello'
}
window.addEventListener( 'load', SetValue )
</script>
</body>
</html>
Я понимаю только Cefтолько сейчас начинает реально обретать форму. Похоже, я должен был передать CefRenderProcessHandler классу SimpleApp, чтобы предоставить ему доступ ко всем методам RenderProcessHandler. Затем мне пришлось переопределить OnContextCreated с моей собственной версией (так как исходная версия является просто функцией-заполнителем)
Вызов CefExecuteProcess, как мне кажется, фактически заставляет процесс запускаться. Я мог бы использовать некоторые разъяснения по этому поводу.