Reading notes of libcef & chromium

libcef notes

Cef1:

CefBrowser::CreateBrowser ->
  CreateBrowserHelper ->
		PostTask to UI Thread ->
			CefBrowser::CreateBrowserSync

CefBrowser::CreateBrowserSync(window_info, client_handler, url, settings) [browser_impl.cc]
	-> new CefBrowserImpl(window_info, settings, opener{NativeView = null}, client_handler)
		-> BrowserWebViewDelegate(this)
		-> main_frame_ -> CefFrameImpl(this, 0, "", "")
	-> this->UIT_CreateBrowser(startup_url)
		-> Native CefBrowserImpl
			-> Gtk [browser_impl_gtk.cc]
				-> parentView = window_info.parent_widget [= null -> gtk_new_window]
				-> webviewHost = WebViewHost::Create(parent_widget, rect, delegate, 0{PaintDelegate*}, dev_tools, pref)
					-> Gtk WebViewHost::Create [webview_host_gtk.cc]
						-> host = new WebViewHost(delegate)
						-> host->view = WebWidgetHost::CreateWidget(parent_widget, host)
							-> Gtk WebWidgetHost::CreateWidget [webwidget_host_gtk.cc]
								-> WebWidgetHostGtkWidget::CreateNewWidget(parent_widget, host)
									-> gtk_fixed_new()
									-> gtk_box_pack_start(parent_widget, widget, 1, 1, 0)
									-> connect signals
									-> g_object_set_data(widget, key, host)

						-> host->webwidget = WebView::create(delegate)[Webkit/chromium/src/WebViewImpl.cpp]
							-> new WebViewImpl(delegate)
							-> page = new Page(pageClients)
						-> host->webwidget->set{Permission, Prerenderer}Client(delegate)
						-> host->webwidget->initializeMainFrame(delegate)
							-> webFrame = WebFrameImpl::create(delegate)
							-> webFrame->initializeMainFrame
								-> Frame::create(page)
						-> pref.Apply((WebView*)host->webwidget) [webikit/glue/webpreferences.cc]

				-> window_info.widget = webviewHost->::WebWidgetHost::view_handle() [connect "destroy"]


			-> Mac [browser_impl_mac.mm]
				-> window_info.window_rendering_disabled
					[ 
					  YES -> parentWnd = window_info.parent_view [= null -> [NSWindow alloc]]
					  NO  -> paint_delegate = new CefBrowserImpl::PaintDelegate(this)
					]
					-> webviewHost = WebViewHost::Create(parent_view, rect, delegate, paint_delegate, dev_tools, pref)
						-> OSX WebViewHost::Create [webview_host_mac.mm]
							-> host = new WebViewHost(delegate)
							-> paint_delegate
								[
									= 0  -> 
										host->view = [BrowserWebView alloc] 
										[parent_view addSubView: host->view]

									!= 0 -> 
									 	host->paint_delegate = paint_delegate
									 	host->view = 0
								]
									-> BrowserWebView: NSView [browser_webview_mac.mm]
										BrowserWebView::drawRect(dirtyRect)
											-> webViewHost->Paint(diryRect) [webwidget_host_mac.mm]
												-> canvas::reset(new skia::PlatformCanvas)
													-> skia::CreatePlatformCanvas [skia/ext/platform_canvas.h]
												-> host->view
													[
														!= 0 ->
															skia::DrawToNativeContext
														= 0 -> 
															bitmap = canvas->getDevice()->accessBitmap [check bitmap.config() == kARGB_8888_Config]
															pixels = bitmap.getPixels()
															paint_delegate->Paint(popup, rects, pixels)
													]
							-> host->webwidget = WebView::create(delegate) [Webkit/chromium/src/WebViewImpl.cpp]
								...


					-> webViewHost->SetIsTransparent(window_info.is_transparent)

					-> window_info.view = webviewHost->::WebWidgetHost::view_handle()
			-> Win
				-> window_info.window_rendering_disabled
					[ 
					  YES -> parentWnd = window_info.parent_view [= null -> CreateWindowEx]
					  NO  -> paint_delegate = new CefBrowserImpl::PaintDelegate(this)
					]
					-> webviewHost = WebViewHost::Create(parent_view, rect, delegate, paint_delegate, dev_tools, pref)
						-> Win WebViewHost::Create [webview_host_win.cc]
							paint_delegate
								[
									= 0  -> 
										host->view = CreateWindow(WebWidgetHost::WndProc)
										SetWindowUserData(host->view, host)

									!= 0 -> 
									 	host->paint_delegate = paint_delegate
									 	host->view = 0
								]
									-> WebWidgetHost::WndProc [webwidget_host_win.cc]
										[
											WM_PAINT -> host->Paint()
												-> WebWidgetHost::Paint()
													-> host->view 
														[
															!= 0 -> 
																skia::DrawToNativeContxt

															= 0 -> 
																bitmap = canvas->getDevice()->accessBitmap [check bitmap.config() == kARGB_8888_Config]
																pixels = bitmap.getPixels()
																paint_delegate->Paint
														] 
													
										]

								-> host->webwidget = WebView::create(delegate) [Webkit/chromium/src/WebViewImpl.cpp]
								...

Cef3:

CefBrowser::CreateBrowser ->
	CreateBrowserHelper ->
		PostTask to UI Thread ->
			CefBrowser::CreateBrowserSync

CefBrowser::CreateBrowserSync(window_info, client, url, settings) [browser_host_impl.cc]
	-> new CefBrowserImpl(window_info, client, url, settings)
		-> browser = CefBrowserHostImpl::Create(window_info, settings, client, web_contents{=0}, browser_id, opener{=0})
			-> if web_contents = 0
				web_contents = content::WebContents::Create [browser/web_contents.h]
					-> WebContents::CreateWithOpener [browser/web_contents/web_contents_impl.cc]
						-> new_contents = new WebContentsImpl
							-> Native WebContenstViewImpls [web_contents_view_{gtk, mac, win, guest, ...}.cc]


			-> browser = new CefBrowserHostImpl(window_info, settings, client, web_contents, browiser_id, opender{=0})
				-> web_contents->setDelegate(this)
				-> registrar->add(NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED, web_contents)
				-> placeholder_frame = new CefFrameHostImpl
				-> SetRenderViewHost(web_contents->GetRenderViewHost())
					-> regisrar->add(NOTIFICATION_FOCUS_CHANGED_IN_PAGE, render_host)

			-> browser->PlatformCreateWindow
				-> Gtk PlatformCreateWindow [browser_host_impl_gtk.cc]
					-> parentView = window_info.parent_widget [= null -> gtk_new_window]
					-> window_info.widget = web_contents->GetView()->GetNativeView() [connect "destroy"]
					-> gtk_container_add(parentView, window_info.widget)

				-> Mac PlatformCreateWindow [browser_host_impl_mac.mm]
					-> parentView = window_info.parent_view [= null -> [UnderlayOpenGLHostingWindow alloc]]
					-> browserView = [CefBrowserHostView alloc]
					-> [parentView addSubview: browserView]
					-> nativeView = web_contents->GetView()->GetNativeView()
					-> [browserView addSubView: nativeView]
					-> window_info.view = browser_view

				-> Win PlatformCreateWindow [browser_host_impl_win.cc]
					-> window_info.window = CreateWindowEx
					-> SetParent(web_contents->GetView()->GetNativeView(), window_info.window)