mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-19 01:04:20 +00:00
427 lines
14 KiB
C++
427 lines
14 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE 6 technical preview.
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Copyright (c) 2017 - ROLI Ltd.
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You may use this code under the terms of the GPL v3
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(see www.gnu.org/licenses).
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For this technical preview, this file is not subject to commercial licensing.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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#if JUCE_MINGW
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JUCE_DECLARE_UUID_GETTER (IOleClientSite, "00000118-0000-0000-c000-000000000046")
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JUCE_DECLARE_UUID_GETTER (IDispatch, "00020400-0000-0000-c000-000000000046")
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#ifndef WebBrowser
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class WebBrowser;
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#endif
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#endif
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JUCE_DECLARE_UUID_GETTER (DWebBrowserEvents2, "34A715A0-6587-11D0-924A-0020AFC7AC4D")
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JUCE_DECLARE_UUID_GETTER (IConnectionPointContainer, "B196B284-BAB4-101A-B69C-00AA00341D07")
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JUCE_DECLARE_UUID_GETTER (IWebBrowser2, "D30C1661-CDAF-11D0-8A3E-00C04FC9E26E")
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JUCE_DECLARE_UUID_GETTER (WebBrowser, "8856F961-340A-11D0-A96B-00C04FD705A2")
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class WebBrowserComponent::Pimpl : public ActiveXControlComponent
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{
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public:
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Pimpl() {}
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~Pimpl()
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{
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if (connectionPoint != nullptr)
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connectionPoint->Unadvise (adviseCookie);
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if (browser != nullptr)
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browser->Release();
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}
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void createBrowser()
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{
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auto webCLSID = __uuidof (WebBrowser);
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createControl (&webCLSID);
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auto iidWebBrowser2 = __uuidof (IWebBrowser2);
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auto iidConnectionPointContainer = __uuidof (IConnectionPointContainer);
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browser = (IWebBrowser2*) queryInterface (&iidWebBrowser2);
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if (auto connectionPointContainer = (IConnectionPointContainer*) queryInterface (&iidConnectionPointContainer))
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{
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connectionPointContainer->FindConnectionPoint (__uuidof (DWebBrowserEvents2), &connectionPoint);
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if (connectionPoint != nullptr)
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{
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auto* owner = dynamic_cast<WebBrowserComponent*> (getParentComponent());
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jassert (owner != nullptr);
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auto handler = new EventHandler (*owner);
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connectionPoint->Advise (handler, &adviseCookie);
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handler->Release();
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}
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}
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}
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void goToURL (const String& url,
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const StringArray* headers,
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const MemoryBlock* postData)
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{
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if (browser != nullptr)
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{
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VARIANT headerFlags, frame, postDataVar, headersVar; // (_variant_t isn't available in all compilers)
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VariantInit (&headerFlags);
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VariantInit (&frame);
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VariantInit (&postDataVar);
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VariantInit (&headersVar);
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if (headers != nullptr)
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{
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V_VT (&headersVar) = VT_BSTR;
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V_BSTR (&headersVar) = SysAllocString ((const OLECHAR*) headers->joinIntoString ("\r\n").toWideCharPointer());
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}
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if (postData != nullptr && postData->getSize() > 0)
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{
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auto sa = SafeArrayCreateVector (VT_UI1, 0, (ULONG) postData->getSize());
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if (sa != nullptr)
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{
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void* data = nullptr;
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SafeArrayAccessData (sa, &data);
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jassert (data != nullptr);
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if (data != nullptr)
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{
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postData->copyTo (data, 0, postData->getSize());
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SafeArrayUnaccessData (sa);
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VARIANT postDataVar2;
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VariantInit (&postDataVar2);
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V_VT (&postDataVar2) = VT_ARRAY | VT_UI1;
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V_ARRAY (&postDataVar2) = sa;
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sa = nullptr;
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postDataVar = postDataVar2;
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}
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else
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{
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SafeArrayDestroy (sa);
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}
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}
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}
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auto urlBSTR = SysAllocString ((const OLECHAR*) url.toWideCharPointer());
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browser->Navigate (urlBSTR, &headerFlags, &frame, &postDataVar, &headersVar);
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SysFreeString (urlBSTR);
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VariantClear (&headerFlags);
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VariantClear (&frame);
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VariantClear (&postDataVar);
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VariantClear (&headersVar);
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}
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}
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//==============================================================================
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IWebBrowser2* browser = nullptr;
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private:
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IConnectionPoint* connectionPoint = nullptr;
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DWORD adviseCookie = 0;
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//==============================================================================
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struct EventHandler : public ComBaseClassHelper<IDispatch>,
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public ComponentMovementWatcher
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{
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EventHandler (WebBrowserComponent& w) : ComponentMovementWatcher (&w), owner (w) {}
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JUCE_COMRESULT GetTypeInfoCount (UINT*) override { return E_NOTIMPL; }
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JUCE_COMRESULT GetTypeInfo (UINT, LCID, ITypeInfo**) override { return E_NOTIMPL; }
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JUCE_COMRESULT GetIDsOfNames (REFIID, LPOLESTR*, UINT, LCID, DISPID*) override { return E_NOTIMPL; }
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JUCE_COMRESULT Invoke (DISPID dispIdMember, REFIID /*riid*/, LCID /*lcid*/, WORD /*wFlags*/, DISPPARAMS* pDispParams,
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VARIANT* /*pVarResult*/, EXCEPINFO* /*pExcepInfo*/, UINT* /*puArgErr*/) override
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{
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if (dispIdMember == DISPID_BEFORENAVIGATE2)
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{
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*pDispParams->rgvarg->pboolVal
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= owner.pageAboutToLoad (getStringFromVariant (pDispParams->rgvarg[5].pvarVal)) ? VARIANT_FALSE
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: VARIANT_TRUE;
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return S_OK;
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}
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if (dispIdMember == 273 /*DISPID_NEWWINDOW3*/)
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{
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owner.newWindowAttemptingToLoad (pDispParams->rgvarg[0].bstrVal);
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*pDispParams->rgvarg[3].pboolVal = VARIANT_TRUE;
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return S_OK;
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}
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if (dispIdMember == DISPID_DOCUMENTCOMPLETE)
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{
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owner.pageFinishedLoading (getStringFromVariant (pDispParams->rgvarg[0].pvarVal));
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return S_OK;
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}
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if (dispIdMember == 271 /*DISPID_NAVIGATEERROR*/)
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{
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int statusCode = pDispParams->rgvarg[1].pvarVal->intVal;
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*pDispParams->rgvarg[0].pboolVal = VARIANT_FALSE;
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// IWebBrowser2 also reports http status codes here, we need
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// report only network errors
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if (statusCode < 0)
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{
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LPTSTR messageBuffer = nullptr;
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auto size = FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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nullptr, statusCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPTSTR) &messageBuffer, 0, nullptr);
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String message (messageBuffer, size);
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LocalFree (messageBuffer);
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if (! owner.pageLoadHadNetworkError (message))
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*pDispParams->rgvarg[0].pboolVal = VARIANT_TRUE;
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}
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return S_OK;
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}
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if (dispIdMember == 263 /*DISPID_WINDOWCLOSING*/)
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{
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owner.windowCloseRequest();
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// setting this bool tells the browser to ignore the event - we'll handle it.
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if (pDispParams->cArgs > 0 && pDispParams->rgvarg[0].vt == (VT_BYREF | VT_BOOL))
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*pDispParams->rgvarg[0].pboolVal = VARIANT_TRUE;
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return S_OK;
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}
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return E_NOTIMPL;
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}
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void componentMovedOrResized (bool, bool) override {}
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void componentPeerChanged() override {}
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void componentVisibilityChanged() override { owner.visibilityChanged(); }
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private:
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WebBrowserComponent& owner;
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static String getStringFromVariant (VARIANT* v)
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{
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return (v->vt & VT_BYREF) != 0 ? *v->pbstrVal
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: v->bstrVal;
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (EventHandler)
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};
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Pimpl)
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};
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//==============================================================================
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WebBrowserComponent::WebBrowserComponent (const bool unloadPageWhenBrowserIsHidden_)
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: browser (new Pimpl()),
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blankPageShown (false),
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unloadPageWhenBrowserIsHidden (unloadPageWhenBrowserIsHidden_)
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{
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setOpaque (true);
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addAndMakeVisible (browser.get());
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}
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WebBrowserComponent::~WebBrowserComponent()
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{
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}
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//==============================================================================
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void WebBrowserComponent::goToURL (const String& url,
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const StringArray* headers,
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const MemoryBlock* postData)
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{
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lastURL = url;
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if (headers != nullptr)
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lastHeaders = *headers;
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else
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lastHeaders.clear();
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if (postData != nullptr)
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lastPostData = *postData;
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else
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lastPostData.reset();
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blankPageShown = false;
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if (browser->browser == nullptr)
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checkWindowAssociation();
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browser->goToURL (url, headers, postData);
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}
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void WebBrowserComponent::stop()
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{
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if (browser->browser != nullptr)
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browser->browser->Stop();
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}
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void WebBrowserComponent::goBack()
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{
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lastURL.clear();
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blankPageShown = false;
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if (browser->browser != nullptr)
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browser->browser->GoBack();
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}
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void WebBrowserComponent::goForward()
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{
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lastURL.clear();
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if (browser->browser != nullptr)
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browser->browser->GoForward();
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}
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void WebBrowserComponent::refresh()
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{
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if (browser->browser != nullptr)
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browser->browser->Refresh();
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}
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//==============================================================================
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void WebBrowserComponent::paint (Graphics& g)
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{
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if (browser->browser == nullptr)
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{
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g.fillAll (Colours::white);
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checkWindowAssociation();
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}
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}
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void WebBrowserComponent::checkWindowAssociation()
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{
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if (isShowing())
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{
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if (browser->browser == nullptr && getPeer() != nullptr)
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{
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browser->createBrowser();
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reloadLastURL();
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}
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else
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{
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if (blankPageShown)
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goBack();
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}
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}
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else
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{
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if (browser != nullptr && unloadPageWhenBrowserIsHidden && ! blankPageShown)
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{
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// when the component becomes invisible, some stuff like flash
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// carries on playing audio, so we need to force it onto a blank
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// page to avoid this..
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blankPageShown = true;
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browser->goToURL ("about:blank", 0, 0);
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}
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}
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}
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void WebBrowserComponent::reloadLastURL()
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{
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if (lastURL.isNotEmpty())
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{
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goToURL (lastURL, &lastHeaders, &lastPostData);
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lastURL.clear();
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}
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}
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void WebBrowserComponent::parentHierarchyChanged()
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{
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checkWindowAssociation();
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}
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void WebBrowserComponent::resized()
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{
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browser->setSize (getWidth(), getHeight());
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}
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void WebBrowserComponent::visibilityChanged()
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{
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checkWindowAssociation();
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}
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void WebBrowserComponent::focusGained (FocusChangeType)
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{
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auto iidOleObject = __uuidof (IOleObject);
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auto iidOleWindow = __uuidof (IOleWindow);
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if (auto oleObject = (IOleObject*) browser->queryInterface (&iidOleObject))
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{
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if (auto oleWindow = (IOleWindow*) browser->queryInterface (&iidOleWindow))
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{
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IOleClientSite* oleClientSite = nullptr;
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if (SUCCEEDED (oleObject->GetClientSite (&oleClientSite)))
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{
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HWND hwnd;
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oleWindow->GetWindow (&hwnd);
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oleObject->DoVerb (OLEIVERB_UIACTIVATE, nullptr, oleClientSite, 0, hwnd, nullptr);
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oleClientSite->Release();
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}
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oleWindow->Release();
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}
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oleObject->Release();
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}
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}
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void WebBrowserComponent::clearCookies()
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{
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HeapBlock<::INTERNET_CACHE_ENTRY_INFOA> entry;
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::DWORD entrySize = sizeof (::INTERNET_CACHE_ENTRY_INFOA);
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::HANDLE urlCacheHandle = ::FindFirstUrlCacheEntryA ("cookie:", entry.getData(), &entrySize);
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if (urlCacheHandle == nullptr && GetLastError() == ERROR_INSUFFICIENT_BUFFER)
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{
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entry.realloc (1, entrySize);
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urlCacheHandle = ::FindFirstUrlCacheEntryA ("cookie:", entry.getData(), &entrySize);
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}
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if (urlCacheHandle != nullptr)
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{
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for (;;)
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{
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::DeleteUrlCacheEntryA (entry.getData()->lpszSourceUrlName);
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if (::FindNextUrlCacheEntryA (urlCacheHandle, entry.getData(), &entrySize) == 0)
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{
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if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
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{
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entry.realloc (1, entrySize);
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if (::FindNextUrlCacheEntryA (urlCacheHandle, entry.getData(), &entrySize) != 0)
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continue;
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}
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break;
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}
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}
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FindCloseUrlCache (urlCacheHandle);
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}
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}
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} // namespace juce
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