WebKit (Blink Branch) creation of each component (Frameview)

Start with the render_view_impl.cc.

1. The method Renderviewimpl::initialize is:

WebView ()->setmainframe (Webframe::create (Main_render_frame_.get ()));

2. First look at the parameters inside, that is webframe::create

This code executes: method in file webfraemimpl.cc: webframe::create

3. The method above is executed in the same file: Webframeimpl::create

4. The method above performs the overloaded method of the same file: Webframeimpl::create

5. The above method executes the constructor: Webframeimpl::webframeimpl

Note: The Webframeinit object is created in this constructor.

The Webframeinit class is defined in the file WebFrameImpl.h. This class inherits the Frameinit.

Class Webframeinit:public Webcore::frameinit

The Webframeinit constructor is as follows:

Webframeinit (Webframeimpl*webframeimpl, int64_t Frameid)

: Webcore::frameinit (Frameid)

, M_frameloaderclientimpl (Webframeimpl)

{

Setframeloaderclient (&m_frameloaderclientimpl);

}

In this constructor, the frameinit object is created and the Webframeimpl value is paid to the FrameloaderclienT object.

The Frameinit class is defined in the file Frame.h.

Class frameinit:publicrefcounted<frameinit>

6. Next, let's look at

WebView ()->setmainframe (Webframe::create (Main_render_frame_.get ()));

Look at the method Setmainframe

7. This method is in file webviewimpl.cc method: Webviewimpl::setmainframe

The implementation of this method is as follows:

Voidwebviewimpl::setmainframe (webframe* frame)

{

Towebframeimpl (frame)->initializeasmainframe (page ());

}

8. We'll look at the method initializeasmainframe

The method is in the file WebFrameImpl.cpp,

Webframeimpl::initializeasmainframe

In this method, there are

Setwebcoreframe (Frame::create (m_frameinit));

and M_frame->init ();

These two codes are more critical.

9. We look at Frame::create first (m_frameinit)

This method is frame::create in the file Frame.cpp

Passrefptr<frame>frame::create (passrefptr<frameinit> frameinit)

{

refptr<frame> Frame = Adoptref (Newframe (frameinit));

if (!frame->ownerelement ())

Frame->page ()->setmainframe (frame);

Inspectorinstrumentation::frameattachedtoparent (Frame.get ());

return Frame.release ();

}

The frame object is created,

Note: When you create a Frame object, you also create a Frameloader object.

There is code in its constructor:

, M_loader (This,frameinit->frameloaderclient ())

Also, the frame->page ()->setmainframe method can be executed.

10. Look again at M_frame->init ();

11. The above method is in the file Frame.h, there are methods:

inlinevoid frame::init ()

{

M_loader.init ();

}

12. Look again at M_loader.init ();

M_loader is the Frameloader type. The method executes the FrameLoader.cpp file in the method Frameloader::init ()

13. Here is the code M_client->createdocumentloader

Execute the method in file FrameLoaderClientImpl.cpp:

Frameloaderclientimpl::createdocumentloader

Inside, there is code:

Refptr<webdatasourceimpl>ds = Webdatasourceimpl::create (frame, request, data);

14. The above method in the file WebDataSourceImpl.cpp, webdatasourceimpl::create.

15. The method calls the Webdatasourceimpl constructor.

There are, in this constructor,

Webdatasourceimpl::webdatasourceimpl (frame*frame, const resourcerequest& request, const substitutedata& Data)

: Documentloader (frame, request, data)

The Documentloader object is created.

This is the first time the Documentloader object is created.

16. After that, the Documentloader::finishedloading () method is executed, with the code in the method: Commitifready ()

Executes the Documentloader::commitifready () method of the same file.

17. Re-execution Method Frameloader::commitprovisionalload ()

18. Re-execution method:

Frameloaderclientimpl::transitiontocommittedfornewpage ()

19. Re-execution method:

Webframeimpl::createframeview () Create a first Frameview

20. The above is the creation of the first Documentloader object and the Fraemview object.

21. Then execute the method:

Frameloader::loadwithnavigationaction

Frameloaderclientimpl::createdocumentloader

Webdatasourceimpl::create

Documentloader::D Ocumentloader

Creates a second Documentloader object.

22. Then proceed:

Documentloader::d atareceived ()

Documentloader::commitifready ()

Frameloader::commitprovisionalload ()

Frameloaderclientimpl::transitiontocommittedfornewpage ()

Webframeimpl::createframeview ()

Create a second Frameview.

Frameview is a more critical component, it is transparent, can make the entire chromium transparent display Web page