Bug 47167 – [Qt] Webkit2 MacOS build fix

• Component: New Bugs
• Status: RESOLVED FIXED

[Luiz Agostini]

Webkit2 MacOS build fix

[Luiz Agostini]

Created attachment 69770 [details]
patch

[Luiz Agostini]

Committed r69103: <http://trac.webkit.org/changeset/69103>

[Adam Roben (:aroben)]

This change broke the Windows build: <http://build.webkit.org/builders/Windows%20Debug%20%28Build%29/builds/25146/steps/compile-webkit/logs/stdio>

This is breaking Windows because WKNativeEvent.h is an API header, but PLATFORM() is not API. We need to remove the use of PLATFORM from this public header.

[Ademar Reis]

Please correct me if I'm wrong, but there's no plan to support webkit2 in qt-webkit-2.1, so I'm removing the block of Bug 39121 (qt-webkit-2.1 master bug).

[Luiz Agostini]

WKNativeEvent.h:

#ifdef __APPLE__
#ifdef __OBJC__
@class NSEvent;
#else
struct NSEvent;
#endif
typedef NSEvent *WKNativeEventPtr;
#elif defined(WIN32) || defined(_WIN32)
typedef const struct tagMSG* WKNativeEventPtr;
#else
typedef const void* WKNativeEventPtr;
#endif

When building Qt in macos it ends up using typedef NSEvent *WKNativeEventPtr; what breaks Qt build. As this is a public file the PLATFORM() macro cannot be used. 
How can we have a Qt specific typedef without using PLATFORM?

[Luiz Agostini]

I am considering that file WKNativeEvent will not be included by QtWebKit users and that it will be wrapped by QtWebKit.
Then it is enough to put a definition in WebKit2.pro. 

[10:48am] lca: kenneth_: I was thinking about defining something in our .pro and using ifdef to check if it is defined
[10:48am] aroben: lca: you'd have to do that for all projects that include WebKit2 headers, too
[10:48am] kenneth_: how would that help a user ot QtWebKit2
[10:48am] kenneth_: exactly
[10:49am] kenneth_: everyone would have to put that in their .pro

Kenneth, Adam, is WKNativeEvent really public API? Should not Qt wrap it?

[Adam Roben (:aroben)]

(In reply to comment #6)
> Kenneth, Adam, is WKNativeEvent really public API? Should not Qt wrap it?

It is used by WKPage. But since you wrap WKPage it seems find to wrap WKNativeEvent, too.

[Kenneth Rohde Christiansen]

Thought we might expose the C API as well.

[Luiz Agostini]

Created attachment 70070 [details]
patch

I rolled out last patch because it broke some builds. The problem was that PLATFORM() macro may not be used in file WKNativeEvent.h.

Qt build is broken in MacOS because of the use of __APPLE__ macro in that file. As it is a public file it is not easy conciliate the use of __APPLE__
and Qt when building Qt in MacOS. A solution is to have a Qt specific WKNativeEvent.h that only has the typedef needed by Qt.

[Luiz Agostini]

Committed r69304: <http://trac.webkit.org/changeset/69304>

[Balazs Kelemen]

I do not like that we need a new file. Why not just change #ifdef __APPLE__ to
#ifdef __APPLE__ && !defined(BUILDING_QT__) ?

[Luiz Agostini]

(In reply to comment #11)
> I do not like that we need a new file. Why not just change #ifdef __APPLE__ to
> #ifdef __APPLE__ && !defined(BUILDING_QT__) ?

Because it is a public file. QtWebKit users would need to define BUILDING_QT__ if they want to include WKNativeEvent.h.