WebBrowserComponent Request

General JUCE discussion
1

Hi Jules.

Can’t believe I’m the 1st to ask for this, but what about adding a callback pageFinishedLoading(String urlString)?

Thanks

2

I think I didn’t add that because I couldn’t find a good way to do it across platforms… If anyone wants to do some research and figure out how it’s done on OSX and windows, I’d be glad to add it!

3

Still didn’t find a solution to the Mac browser, but for whoever seeks the Windows version, this is how I did it:

  1. Add an empty virtual pageFinishedLoading() to the WebBrowserComponent class (cause we still need to implement the Mac version)
	virtual void pageFinishedLoading(const String& url) {}
  1. In juce_win32_WebBrowserComponent.cpp, add the first ‘if’ to the Invoke() function:
        JUCE_COMRESULT Invoke (DISPID dispIdMember, REFIID /*riid*/, LCID /*lcid*/, WORD /*wFlags*/, DISPPARAMS* pDispParams,
                               VARIANT* /*pVarResult*/, EXCEPINFO* /*pExcepInfo*/, UINT* /*puArgErr*/)
        {
		if (dispIdMember == DISPID_DOCUMENTCOMPLETE)
		{
			String url(pDispParams->rgvarg[0].pvarVal->bstrVal); 
			owner.pageFinishedLoading(url);
			return S_OK;
		}
            else if (dispIdMember == DISPID_BEFORENAVIGATE2)
            {
                VARIANT* const vurl = pDispParams->rgvarg[5].pvarVal;
                String url;

                if ((vurl->vt & VT_BYREF) != 0)
                    url = *vurl->pbstrVal;
                else
                    url = vurl->bstrVal;

                *pDispParams->rgvarg->pboolVal
                    = owner.pageAboutToLoad (url) ? VARIANT_FALSE
                                                  : VARIANT_TRUE;

                return S_OK;
            }

            return E_NOTIMPL;
        }
4

So here is how I did it in OSX (my first Objective-C lines…):

  1. Added the didFinishLoadForFrame() callback to the DownloadClickDetector:
@interface DownloadClickDetector   : NSObject
{
    juce::WebBrowserComponent* ownerComponent;
}

- (DownloadClickDetector*) initWithWebBrowserOwner: (juce::WebBrowserComponent*) ownerComponent;

- (void) webView: (WebView*) webView decidePolicyForNavigationAction: (NSDictionary*) actionInformation
                                                             request: (NSURLRequest*) request
                                                               frame: (WebFrame*) frame
                                                    decisionListener: (id<WebPolicyDecisionListener>) listener;


- (void) webView: (WebView*) webView didFinishLoadForFrame: (WebFrame*) frame;

@end

@implementation DownloadClickDetector

- (DownloadClickDetector*) initWithWebBrowserOwner: (juce::WebBrowserComponent*) ownerComponent_
{
    [super init];
    ownerComponent = ownerComponent_;
    return self;
}

- (void) webView: (WebView*) sender decidePolicyForNavigationAction: (NSDictionary*) actionInformation
                                                            request: (NSURLRequest*) request
                                                              frame: (WebFrame*) frame
                                                   decisionListener: (id <WebPolicyDecisionListener>) listener
{
    (void) sender; (void) request; (void) frame;

    NSURL* url = [actionInformation valueForKey: nsStringLiteral ("WebActionOriginalURLKey")];

    if (ownerComponent->pageAboutToLoad (nsStringToJuce ([url absoluteString])))
        [listener use];
    else
        [listener ignore];
}

- (void) webView: (WebView*) sender didFinishLoadForFrame: (WebFrame*) frame
{
    (void) sender; (void) frame;

	if([frame isEqual:[sender mainFrame]])
	{
		NSURL* url = [[[frame dataSource] request] URL];
		ownerComponent->pageFinishedLoading(nsStringToJuce ([url absoluteString]));
	}
	
}

@end
  1. Added the clickListener also as a frame load delegator:

WebBrowserComponentInternal (WebBrowserComponent* owner):

        clickListener = [[DownloadClickDetector alloc] initWithWebBrowserOwner: owner];
        [webView setPolicyDelegate: clickListener];
	[webView setFrameLoadDelegate: clickListener];
...

~WebBrowserComponentInternal():

       #if JUCE_MAC
        [webView setPolicyDelegate: nil];
	[webView setFrameLoadDelegate: nil];
        [clickListener release];
       #else
...
5

Thanks! I’ll see what I can do with that…