December 2008 - webkit-dev - lists.webkit.org

debug the webkit with visual studio 2005
by 赵经纬 05 Feb '10

05 Feb '10

HI: I am an neebie, i want to debug the webkit with visual studio 2005.now i have finished the steps: 1、 *Installing the Developer Tools* <http://webkit.org/building/tools.html> 2、*Getting WebKit* <http://webkit.org/building/checkout.html> 3、*Building WebKit* <http://webkit.org/building/build.html> now i want to run webkit, i open a Cygwin Shell and type this command in the shell WebKit/WebKitTools/Scripts/run-safari --debug but the result is: ERROR:couldn't determine installed safari path setting enviroments for using microsoft visual studio 2005 x86 tools How can i debug the webkit step by step? thank you!

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WebKit partial rendering issue
by Srinivas Rao M Hamse 15 May '09

15 May '09

Hi, I am using WebKit+Gtk on DirectFB 1.2.0 ported on an arm platform. I am noticing that the render of text input widget is not complete. Attaching a snapshot of google page. In this google text input text box in not drawn. Also seen this issue while rendering other widgets also. WebKit misses some of them at first go. It slowly draws as and when that part of the screen/widget gets refreshed(say by pressing TAB keys) Any idea how to fix this issue ? regards, Srinivas Rao M. -- Srinivas Rao M Hamse

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Fw: not enough space error???
by Aman 08 Apr '09

08 Apr '09

Hi, The release version of the WebCore.lib is about 1.2G, not really??? anybody knows that?? Aman From: Aman Sent: Saturday, December 13, 2008 1:59 PM To: aroben(a)apple.com Cc: webkit-dev Subject: not enough space error??? Hi, Adam and everybody: I received this error the message while building WebCore(release) as someone else before: Linking... fatal error C1083: Cannot open compiler intermediate file: 'C:\cygwin\home\Administrator\webkit\WebKitBuild\lib\WebCore.lib': Not enough space and i saw your post message about this error , but i think it is not like <https://bugs.webkit.org/show_bug.cgi?id=19743>.(i am using the newest version) Aman

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Harmonizing content sniffing
by Adam Barth 05 Mar '09

05 Mar '09

My colleagues and I have put together a web site that makes it easy to compare the mime signatures used by Internet Explorer 7, Firefox 3, Safari 3.1, Google Chrome, and the HTML 5 specification: http://webblaze.cs.berkeley.edu/2009/content-sniffing/ I'm hoping we can use this information to converge the content sniffing algorithms used by different browsers and then update the HTML 5 spec to reflect the consensus. I know some changes to the content sniffing algorithm will be contentious (such as whether to sniff HTML from text/plain), but I'm hoping other changes will be easier. For example, Firefox, IE, and Safari all use different signatures for JPEG. When I raised this issue before on this list, I got the impression that the WebKit project was generally receptive to changing its content sniffing algorithm. Get the ball rolling, I'd suggest making the following changes: 1) Remove the fourth byte of the JPEG signature to match Firefox 3, Google Chrome, and the HTML 5 spec. (Internet Explorer uses a two-byte signature.) 2) Add a signature for GIF. Currently, Internet Explorer 7, Firefox 3, Google Chrome, and the HTML 5 spec all have signatures for GIF, but Safari 3.1 does not. 3) Add a signature for PNG. Currently, Internet Explorer 7, Firefox 3, Google Chrome, and the HTML 5 spec all have signatures for PNG, but Safari 3.1 does not. I think the next logical set is for me to file a bug about these issues, but I wanted to send an email to the list to provide some context for that bug report. Thanks, Adam

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Equivalent of WebKit/Qt's link delegation policy in WebKit/Gtk+?
by Andrew S. Townley 24 Feb '09

24 Feb '09

Hi, I'm trying to work with the GTK+ WebKit from svn/trunk to do rendering for my application. Unfortunately, I'm having some troubles. Unlike the majority of users, I don't need WebKit to access URIs on the Internet. I need to be able to intercept them and display custom HTML content to allow navigation of some complex, in-memory data structures. I thought you might be able to do something with the navigation-requested signal, but this doesn't appear to allow you to substitute content for the URI. In digging around in the source tree, I discovered that the Qt port allows you to get the linkClicked signal, provided you've registered the appropriate link delegation policy with the WebView. Is this functionality planned for the GTK+ version? Is someone currently working on implementing it? If the answers to this are no, does anyone have any pointers for how to implement something similar for the Gtk+ version? I'm not used to the Qt syntax, so I can't find the code where it interacts with the core WebKit classes to accomplish this functionality. I'd be willing to give this a go or at least help someone who is working on this, as it is essential for what I'm doing and my only other alternative is to use the soon-to-be-unmaintained GtkHTML(3) from Gnome svn. Any information on how this sort of behavior can be accomplished with the existing GTK+ api would also be welcome. Thanks in advance, ast -- Andrew S. Townley <ast(a)atownley.org> http://atownley.org

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Transparency on GTK/DirectFB
by Weber, Bernd 23 Feb '09

23 Feb '09

Hi, I'm trying to get Webkit running with transparency on GTK/DirectFB. I can see that it does create transparency effects with the background color of an HTML page, defining, eg. opacity:0.5 or rgba(255,0,0,0.5) in a div. The holy grail however would be to achieve transparency to the underlying desktop, by defining "transparent" as the background color. I'm not sure whether Webkit, especially with GTK/DirectFB, supports this right now. If so, how can I activate it? If not can someone point me to the code so I can implement this feature myself?? Any help is greatly appreciated! -Bernd ----------------------------------------- This message (including any attachments) may contain confidential information intended for a specific individual and purpose. If you are not the intended recipient, delete this message. If you are not the intended recipient, disclosing, copying, distributing, or taking any action based on this message is strictly prohibited.

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New loader class to allow workers to do xhr
by David Levin 20 Jan '09

20 Jan '09

BackgroundRight now, XHR uses SubresourceLoader directly, but this doesn't work well if the XHR is running on another thread (which happens for workers). As described before ( http://docs.google.com/View?docID=dg7mj9sd_6dvthmdqj&revision=_latest) I'm working on making the actual request underneath the XHR happen on the main thread for workers. Proposal To make this happen transparently, I would like to have a new loader class that is used by XHR. It is a thin wrapper over SubresourceLoader when the XHR is done for a Document, but when done on a worker, it sends messages to the main thread to do the work. I was thinking about calling the class ScriptResourceLoader. It is stripped down from SubresourceLoader / ResourceLoader to have only the items that are needed by XHR (to reduce the amount of work to be done for the Worker implementation of it). Here's what it looks like: class ScriptResourceLoader { public: static PassRefPtr<ScriptResourceLoader> create(ScriptExecutionContext*, ScriptResourceLoaderClient*, const ResourceRequest&, bool skipCanLoadCheck, bool sendResourceLoadCallbacks, bool shouldContentSniff); virtual ~ScriptResourceLoader() {} virtual void cancel() = 0; virtual void ref() = 0; virtual void deref() = 0; }; class ScriptResourceLoaderClient { public: virtual ~ScriptResourceLoaderClient() {} virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) { } virtual void didReceiveResponse(const ResourceResponse&) { } virtual void didReceiveData(const char*, int) { } virtual void didFinishLoading(int resourceIdentifer) { } virtual void didFail(bool isCancellation) { } virtual void securityOriginDenyRequest() { } virtual void receivedCancellation(const ResourceResponse&) { } }; Question Do you have any feedback about the naming of the class or its functionality? Thanks, Dave

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SquirrelFish in WebKitGtk
by ying lcs 07 Jan '09

07 Jan '09

If I get the source for WebKitGtk, using the documentation described here: http://live.gnome.org/WebKitGtk Does it have SquirrelFish? Thank you for any help.

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Content sniffing in WebCore
by Adam Barth 06 Jan '09

06 Jan '09

Currently, every WebKit port has to implement its own content sniffing algorithm. This is problematic for compatibility and security. We should implement a content sniffing algorithm in WebCore so that it can be used by every port. Background A number of web servers don't properly set the Content-Type header when they serve responses. One common misconfiguration is to not send a Content-Type header at all or to send a bogus Content-Type header (i.e., with a value like "(null)" or "application/unknown"). To render these sites correctly, all browsers employ content sniffing algorithms that look at the contents of the response to determine the type of the resource. Some browsers have very aggressive content sniffing algorithms that often change the type of a resource. This can be dangerous if a web server allows users to upload content, such as images, and the browser treats these resources as HTML because this lets an attacker XSS the site. Designing a content sniffing algorithm is a careful balancing act between compatibility and security. WebKit WebKit itself does not contain a content sniffing algorithm, leaving each port to design their own. For example, Safari and Chromium each implement their own content sniffing algorithm and I imagine (although I haven't tested) that other ports do so as well. This causes unnecessary compatibility issues between different WebKit ports and leaves each port vulnerable to fend for itself in avoiding the security pitfalls. I think it makes sense for WebCore itself to implement one content sniffing algorithm that every port can use. One starting point for this common implementation is the Chromium content sniffer, which is open source. A number of Chromium contributors, myself included, have spent a lot of effort tuning that content sniffer to maximize compatibility while minimizing attack surface, and we'd like everyone to benefit from our efforts. Standardization We've also been working with the HTML 5 working group on standardizing content sniffing algorithms across all browsers. Eventually, I'd like to see WebKit's content sniffer converge with the HTML 5 specification. This process will likely involve the WebKit content sniffer and the HTML 5 specification evolving over time towards convergence. Feedback I'm sending this email to the list to get buy-in from the rest of the WebKit community on the general direction of implementing a content sniffer. I'd also like specific feedback about which content sniffing heuristics you think are important to include. As a starting point for discussion, you can see the Chromium content sniffer here: http://src.chromium.org/viewvc/chrome/trunk/src/net/base/mime_sniffer.cc?vi… The top of that file has some comments that explain some of the guiding design choices in the algorithm and a comparison with the behavior of some other browsers. Adam

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About Dom tree
by zhenghe zhang 05 Jan '09

05 Jan '09

Hi I am studying the "webkit", and now I have a question , I hope you tell me , thank you! As follows: <table width="640" height="530" border="0" cellpadding="0" cellspacing="0"> <tr> <td><img src="images/index.jpg" usemap="#Map" border="0"></td> </tr> </table> <map name="Map"> <area shape="rect" coords="110,108,294,148" href="column.jsp?columnid=JINGCAIDAODU"> </map> I think the map's parent is the "img", but others don't agree with me. Please tell me the detail on the basic of DOM tree. Thanks zh

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