/*

 * Copyright (C) 2007 Apple Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#include "config.h"

#include "WebKitDLL.h"

#include "DefaultPolicyDelegate.h"

#include "WebKit.h"

#pragma warning(push, 0)

#include <WebCore/PlatformString.h>

#pragma warning(pop)

using namespace WebCore;

// FIXME: move this enum to a separate header file when other code begins to use it.

typedef enum WebExtraNavigationType {

    WebNavigationTypePlugInRequest = WebNavigationTypeOther + 1

} WebExtraNavigationType;

// DefaultPolicyDelegate ----------------------------------------------------------------

DefaultPolicyDelegate::DefaultPolicyDelegate()

    : m_refCount(0)

{

    gClassCount++;

    gClassNameCount.add("DefaultPolicyDelegate");

}

DefaultPolicyDelegate::~DefaultPolicyDelegate()

{

    gClassCount--;

    gClassNameCount.remove("DefaultPolicyDelegate");

}

DefaultPolicyDelegate* DefaultPolicyDelegate::sharedInstance()

{

    static COMPtr<DefaultPolicyDelegate> shared;

    if (!shared)

        shared.adoptRef(DefaultPolicyDelegate::createInstance());

    return shared.get();

}

DefaultPolicyDelegate* DefaultPolicyDelegate::createInstance()

{

    DefaultPolicyDelegate* instance = new DefaultPolicyDelegate();

    instance->AddRef();

    return instance;

}

// IUnknown -------------------------------------------------------------------

HRESULT STDMETHODCALLTYPE DefaultPolicyDelegate::QueryInterface(REFIID riid, void** ppvObject)

{

    *ppvObject = 0;

    if (IsEqualGUID(riid, IID_IUnknown))

        *ppvObject = static_cast<IUnknown*>(this);

    else if (IsEqualGUID(riid, IID_IWebPolicyDelegate))

        *ppvObject = static_cast<IWebPolicyDelegate*>(this);

    else

        return E_NOINTERFACE;

    AddRef();

    return S_OK;

}

ULONG STDMETHODCALLTYPE DefaultPolicyDelegate::AddRef()

{

    return ++m_refCount;

}

ULONG STDMETHODCALLTYPE DefaultPolicyDelegate::Release()

{

    ULONG newRef = --m_refCount;

    if (!newRef)

        delete(this);

    return newRef;

}

HRESULT STDMETHODCALLTYPE DefaultPolicyDelegate::decidePolicyForNavigationAction(

    /*[in]*/ IWebView* webView, 

    /*[in]*/ IPropertyBag* actionInformation, 

    /*[in]*/ IWebURLRequest* request, 

    /*[in]*/ IWebFrame* /*frame*/, 

    /*[in]*/ IWebPolicyDecisionListener* listener)

{

    int navType = 0;

    VARIANT var;

    if (SUCCEEDED(actionInformation->Read(WebActionNavigationTypeKey, &var, 0))) {

        V_VT(&var) = VT_I4;

        navType = V_I4(&var);

    }

    COMPtr<IWebViewPrivate> wvPrivate(Query, webView);

    if (wvPrivate) {

        BOOL canHandleRequest = FALSE;

        if (SUCCEEDED(wvPrivate->canHandleRequest(request, &canHandleRequest)) && canHandleRequest)

            listener->use();

        else if (navType == WebNavigationTypePlugInRequest)

            listener->use();

        else {

            BSTR url;

            // A file URL shouldn't fall through to here, but if it did,

            // it would be a security risk to open it.

            if (SUCCEEDED(request->URL(&url)) && !String(url, SysStringLen(url)).startsWith("file:")) {

                // FIXME: Open the URL not by means of a webframe, but by handing it over to the system and letting it determine how to open that particular URL scheme.  See documentation for [NSWorkspace openURL]

                ;

            }

            listener->ignore();

            SysFreeString(url);

        }

    }

    return S_OK;

}

HRESULT STDMETHODCALLTYPE DefaultPolicyDelegate::decidePolicyForNewWindowAction(

    /*[in]*/ IWebView* /*webView*/, 

    /*[in]*/ IPropertyBag* /*actionInformation*/, 

    /*[in]*/ IWebURLRequest* /*request*/, 

    /*[in]*/ BSTR /*frameName*/, 

    /*[in]*/ IWebPolicyDecisionListener* listener)

{

    listener->use();

    return S_OK;

}

HRESULT STDMETHODCALLTYPE DefaultPolicyDelegate::decidePolicyForMIMEType(

    /*[in]*/ IWebView* webView, 

    /*[in]*/ BSTR type, 

    /*[in]*/ IWebURLRequest* request, 

    /*[in]*/ IWebFrame* /*frame*/, 

    /*[in]*/ IWebPolicyDecisionListener* listener)

{

    BOOL canShowMIMEType;

    if (FAILED(webView->canShowMIMEType(type, &canShowMIMEType)))

        canShowMIMEType = FALSE;

    BSTR url;

    request->URL(&url);

    if (String(url, SysStringLen(url)).startsWith("file:")) {

        BOOL isDirectory = FALSE;

        WIN32_FILE_ATTRIBUTE_DATA attrs;

        if (GetFileAttributesEx(url, GetFileExInfoStandard, &attrs))

            isDirectory = !!(attrs.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);

        if (isDirectory)

            listener->ignore();

        else if(canShowMIMEType)

            listener->use();

        else

            listener->ignore();

    } else if (canShowMIMEType)

        listener->use();

    else

        listener->ignore();

    SysFreeString(url);

    return S_OK;

}

HRESULT STDMETHODCALLTYPE DefaultPolicyDelegate::unableToImplementPolicyWithError(

    /*[in]*/ IWebView* /*webView*/, 

    /*[in]*/ IWebError* error, 

    /*[in]*/ IWebFrame* frame)

{

    BSTR errorStr;

    error->localizedDescription(&errorStr);

    BSTR frameName;

    frame->name(&frameName);

    LOG_ERROR("called unableToImplementPolicyWithError:%S inFrame:%S", errorStr ? errorStr : TEXT(""), frameName ? frameName : TEXT(""));

    SysFreeString(errorStr);

    SysFreeString(frameName);

    return S_OK;

}