Minimum code for implementing WebView (deprecated) or WKWebView

[ChrisR]

Related to this, it looks like Ryan Joseph (aka genericptr) just ported MacOS 11 headers:

 https://github.com/genericptr/MacOS_11_0

[Zoë]

The attached file is a TWebBrowser-like control that uses WKWebView, including the delegate protocol, which we're using in Beyond Compare 4.  Any of you are welcome to use it however you want;  I updated the header to mention the LCL's modified LGPL in case it's used for a patch, but it can be whatever.

In case it's still relevant, I ran into two issues when originally writing, which are in Gitlab as #37441 and #35995

[MISV]

By the way everyone....

"Why is WK_API_ENABLED not on by default?"

Inspecting WebKit.pas > Sources.inc > WKNavigationDelegate.inc it depends on the define being set...

But why is it not set? I suppose I can set the define in some compiler option, but just seems very odd to me.

Am I doing it wrong?

[MISV]

Example:


So first I had

Code: Pascal  [Select][+][-]

1.   Tmsdv_cocoanative_WebBrowserCocoaWKWebViewDelegate_Navigation = objcclass(NSObject)
2.   private
3.     FBrowserCtrlRef: TmsdvWebBrowserCocoaWKWebView;
4.   public
5.     // need implement
6.   end;
7.  
8.       FDelegate_Cocoa_Navigation := Tmsdv_cocoanative_WebBrowserCocoaWKWebViewDelegate_Navigation.alloc.init;
9.       FDelegate_Cocoa_Navigation.FBrowserCtrlRef := Self;
10.       FWebView_CocoaWKWebView.setNavigationDelegate(FDelegate_Cocoa_Navigation);
11.  
12.  

This gives error

Error: Incompatible type for arg no. 1: Got "Tmsdv_cocoanative_WebBrowserCocoaWKWebViewDelegate_Navigation", expected "WKNavigationDelegateProtocol"

Now this seems like a great error and easy fix

Code: Pascal  [Select][+][-]

1.   Tmsdv_cocoanative_WebBrowserCocoaWKWebViewDelegate_Navigation = objcclass(NSObject, WKNavigationDelegateProtocol)
2.   private
3.     FBrowserCtrlRef: TmsdvWebBrowserCocoaWKWebView;
4.   public
5.     // need implement
6.   end;
7.  

But this will throw another error

Error: Identifier not found "WKNavigationDelegateProtocol"

.... Now I have added all units I could think of, but it won't help and the reason seems to be:

fpcsrc/packages/cocoaint/src/webkit/WebKit.pas
includes
fpcsrc/packages/cocoaint/src/webkit/src/Sources.inc
includes
fpcsrc/packages/cocoaint/src/webkit/src/webkit/WKNavigationDelegate.inc

But in this unit the WKNavigationDelegateProtocol does not get compiled in because these are not defined "WK_API_ENABLED, PROTOCOLS"


I am trying to understand how Lazarus one place can recognize the type, but then not recognize the type if I use it. Anyhow, I tried a "hack" defining the beforementioned defines them and then *including* the *WKNavigationDelegate.inc* file myself, but, well I did not get it working.

[Zoë]

See the patches in the bug reports I mentioned:

https://gitlab.com/freepascal.org/fpc/source/-/issues/37441

https://gitlab.com/freepascal.org/fpc/source/-/issues/35995

Still haven't heard why that hasn't been corrected, but the macOS 11 headers on GitHub are correct so if/when that gets merged it should be fixed.

[MISV]

Thank you for explanation and links. I missed them reading the first round. Hmmm... Let us hope it gets merged in soon albeit I can see some time passed since you submitted patches so... Crossing fingers

[trev]

No need to wait; patch your copy of FPC and recompile it. Just make a note so that you can remember to redo it if you upgrade or change versions <voice of experience>.

[MISV]

Okay, applying the patch no problem.

But wondering what the best way is to recompile fpc source that will not kill me.

1)
I tried "Clean all and build" but that did not work since it does not include FPC.

2)
In terminal I navigated to
/Users/%name%/%folder%/LazarusCocoa64/Lazarus
and then tried
./lazbuild --build-all --recursive "/Volumes/DiskW/%folder%/MyAppProjectOSX.lpi" (this project uses a ton of units directly or indirectly including WKWebView)

However it ends up
Error: (Lazarus) [TLazPackageGraph.CompileRequiredPackages] "Exit code 1"

...

What is the best way to force recompiliation of the fpcsrc units?

[avra]

But wondering what the best way is to recompile fpc source that will not kill me.

Might not be the best but it works: https://wiki.freepascal.org/FPC_recompilation_automation

[MISV]

Thank you, I will check it out   (Albeit it states it is for Windows, but can probably use most of it)

Two more questions:
- Is there no way to trigger Lazarus to recompile a "system" FPCSrc unit in an easier manner? Like except the .pas file?
- Could I possibly copy fixed units into my project directory as an alternative?

[trev]

What is the best way to force recompiliation of the fpcsrc units?

Code: Bash  [Select][+][-]

1.  []$ cd <wherever you have the fpc src>
2.  []$ make clean all FPC=/usr/local/lib/fpc/3.2.2/ppcx64 OS_TARGET=darwin CPU_TARGET=x86_64 OPT="-XR/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/"
3.  []$ sudo make install FPC=$PWD/compiler/ppcx64 OS_TARGET=darwin CPU_TARGET=x86_64

[MISV]

Thank you

I ended up using (since I used FPCDeluxe for installing)

1)
Navigated to

Code: Pascal  [Select][+][-]

1. /Users/%name%/LazarusCocoa64/fpcsrc/
2.  

2)

Code: Pascal  [Select][+][-]

1. make clean all FPC=/Users/%name%/LazarusCocoa64/fpc/lib/fpc/3.3.1 OS_TARGET=darwin CPU_TARGET=x86_64 OPT="-XR/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/"

Got quite a few permission errors like

/Users/%name%/LazarusCocoa64/fpc/lib/fpc/3.3.1: Permission denied

(but process seemed to run OK for most part)

3)

Code: Pascal  [Select][+][-]

1. sudo make install FPC=$PWD/compiler/ppcx64 OS_TARGET=darwin CPU_TARGET=x86_64

which resulted in error:

Makefile:135: *** Compiler /Users/%name%/LazarusCocoa64/fpcsrc/compiler/ppcx64 not found.  Stop.

I decided to instead try

Code: Pascal  [Select][+][-]

1. sudo make install FPC=$PWD/../fpc/lib/fpc/3.3.1/ppcx64 OS_TARGET=darwin CPU_TARGET=x86_64

This appears to work...


Will report back later and update post if things worked out

[MISV]

It seemed to compile correctly but...

I guess not because I still get the error that it does not recognize WKNavigationDelegateProtocol etc.

I have tried to do a "Cleanup and build" just to make sure it is not inside LCL that had not updated somehow to the new fpcsrc compilation.

Oh well...

[MISV]

In fpcsrc directory doing

ls -l

and all  files are either

-rw-r--r-- (seems to be all writeable files)
or
drwxr-xr-x (folders)

and I stand as user/owner %name% staff


I do not know...

I was starting to experiment with
sudo chmod -R ./ ...? (sorry did not get it working since day-to-day Windows user here)



I have also tried to introduce a bug into a compiletime bug into webkit ... and that did trigger error.
I have also tried to introduce a bug into a compiletime bug into wknavigationdelegate.inc  both to ensure protocol and wk_api_enabled defines are working... And yes, they are defined properly because inserting random text inside them triggered error


So what is next. Why the **** does it not work when compiling my code inside Lazarus?

Maybe related to permission errors? i.e. no new compiled files are actually generated? I will try research more... ... Open to ideas

[trev]

I would guess that permission errors while recompiling are fatal. I have no idea why you would be getting permission errors if the source is in your home directory - maybe an FPCUpDeluxe issue.

In order of preference, you have a choice to make:

1) Find the files causing permission errors and correct the permissions and/or ownership with chmod and/or chown as necessary;
2) Run the compile command with sudo.