path: root/embed/mozilla/EphyContentPolicy.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 *  Copyright (C) 2003 Christian Persch
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "mozilla-config.h"

#include "config.h"

#include "EphyContentPolicy.h"
#include "EphyUtils.h"

#include "ephy-embed-shell.h"
#include "ephy-embed-single.h"
#include "eel-gconf-extensions.h"
#include "ephy-adblock-manager.h"
#include "ephy-debug.h"

#include <nsCOMPtr.h>
#undef MOZILLA_INTERNAL_API
#include <nsEmbedString.h>
#define MOZILLA_INTERNAL_API 1
#include <nsIDOMAbstractView.h>
#include <nsIDOMDocument.h>
#include <nsIDOMDocumentView.h>
#include <nsIDOMNode.h>
#include <nsIDOMWindow.h>
#include <nsIURI.h>

#define CONF_LOCKDOWN_DISABLE_UNSAFE_PROTOCOLS  "/apps/epiphany/lockdown/disable_unsafe_protocols"
#define CONF_LOCKDOWN_ADDITIONAL_SAFE_PROTOCOLS "/apps/epiphany/lockdown/additional_safe_protocols"

NS_IMPL_ISUPPORTS1(EphyContentPolicy, nsIContentPolicy)

EphyContentPolicy::EphyContentPolicy()
{
    LOG ("EphyContentPolicy ctor (%p)", this);

    mLocked = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_UNSAFE_PROTOCOLS);

    mSafeProtocols = eel_gconf_get_string_list (CONF_LOCKDOWN_ADDITIONAL_SAFE_PROTOCOLS);

    mEmbedSingle = ephy_embed_shell_get_embed_single (embed_shell);
    g_return_if_fail (mEmbedSingle);
}

EphyContentPolicy::~EphyContentPolicy()
{
    LOG ("EphyContentPolicy dtor (%p)", this);

    g_slist_foreach (mSafeProtocols, (GFunc) g_free, NULL);
    g_slist_free (mSafeProtocols);
}

GtkWidget *
EphyContentPolicy::GetEmbedFromContext (nsISupports *aContext)
{
    GtkWidget *ret;

    /*
     * aContext is either an nsIDOMWindow, an nsIDOMNode, or NULL. If it's
     * an nsIDOMNode, we need the nsIDOMWindow to get the EphyEmbed.
     */
    if (aContext == NULL) return NULL;

    nsCOMPtr<nsIDOMWindow> window;

    nsCOMPtr<nsIDOMNode> node (do_QueryInterface (aContext));
    if (node != NULL)
    {
        nsCOMPtr<nsIDOMDocument> domDocument;

        node->GetOwnerDocument (getter_AddRefs (domDocument));
        if (domDocument == NULL) return NULL; /* resource://... */

        nsCOMPtr<nsIDOMDocumentView> docView = 
            do_QueryInterface (domDocument);
        NS_ENSURE_TRUE (docView, NULL);

        nsCOMPtr<nsIDOMAbstractView> view;
        
        docView->GetDefaultView (getter_AddRefs (view));

        window = do_QueryInterface (view);
    }
    else
    {
        window = do_QueryInterface (aContext);
    }
    NS_ENSURE_TRUE (window, NULL);

    ret = EphyUtils::FindEmbed (window);
    if (EPHY_IS_EMBED (ret)) return GTK_WIDGET (ret);

    return NULL;
}

#if MOZ_NSICONTENTPOLICY_VARIANT == 2
NS_IMETHODIMP
EphyContentPolicy::ShouldLoad(PRUint32 aContentType,
                  nsIURI *aContentLocation,
                  nsIURI *aRequestingLocation,
                  nsISupports *aContext,
                  const nsACString &aMimeTypeGuess,
                  nsISupports *aExtra,
                  PRInt16 *aDecision)
{
    NS_ENSURE_ARG (aContentLocation);
    NS_ENSURE_ARG_POINTER (aDecision);

    *aDecision = nsIContentPolicy::ACCEPT;

    /* We have to always allow these, else forms and scrollbars break */
    PRBool isChrome = PR_FALSE, isResource = PR_FALSE;
    aContentLocation->SchemeIs ("chrome", &isChrome);
    aContentLocation->SchemeIs ("resource", &isResource);
    if (isChrome || isResource) return NS_OK;

    PRBool isHttps = PR_FALSE;
    aContentLocation->SchemeIs ("https", &isHttps);
    if (isHttps) return NS_OK;

    /* is this url allowed ? */
    nsEmbedCString spec;
    aContentLocation->GetSpec(spec);

    EphyAdBlockManager *adblock_manager = 
        EPHY_ADBLOCK_MANAGER (ephy_embed_shell_get_adblock_manager (embed_shell));

    if (!ephy_adblock_manager_should_load (adblock_manager, spec.get (), AdUriCheckType (aContentType)))
    {
        *aDecision = nsIContentPolicy::REJECT_REQUEST;

        GtkWidget *embed = GetEmbedFromContext (aContext); 

        if (embed) 
        {
            g_signal_emit_by_name (embed, "content-blocked", spec.get ());
        }
        return NS_OK;
    }

    PRBool isHttp = PR_FALSE;
    aContentLocation->SchemeIs ("http", &isHttp);
    if (isHttp) return NS_OK;

    nsEmbedCString contentSpec;
    aContentLocation->GetSpec (contentSpec);
    if (strcmp (contentSpec.get(), "about:blank") == 0) return NS_OK;

    nsEmbedCString contentScheme;
    aContentLocation->GetScheme (contentScheme);

    /* first general lockdown check */
    if (mLocked &&
        !g_slist_find_custom (mSafeProtocols, contentScheme.get(), (GCompareFunc) strcmp))
    {
        *aDecision = nsIContentPolicy::REJECT_REQUEST;
    }

    return NS_OK;
}

NS_IMETHODIMP
EphyContentPolicy::ShouldProcess(PRUint32 aContentType,
                     nsIURI *aContentLocation,
                     nsIURI *aRequestingLocation,
                 nsISupports *aContext,
                     const nsACString &aMimeType,
                     nsISupports *aExtra,
                     PRInt16 *aDecision)
{
    *aDecision = nsIContentPolicy::ACCEPT;
    return NS_OK;
}

#else

/* boolean shouldLoad (in PRInt32 contentType, in nsIURI contentLocation, in nsISupports ctxt, in nsIDOMWindow window); */
NS_IMETHODIMP EphyContentPolicy::ShouldLoad(PRInt32 aContentType,
                        nsIURI *aContentLocation,
                        nsISupports *aContext,
                        nsIDOMWindow *aWindow,
                        PRBool *_retval)
{
    NS_ENSURE_ARG (aContentLocation);
    NS_ENSURE_ARG_POINTER (_retval);

    *_retval = PR_TRUE;

    PRBool isHttp = PR_FALSE, isHttps = PR_FALSE;
    aContentLocation->SchemeIs ("http", &isHttp);
    aContentLocation->SchemeIs ("https", &isHttps);
    if (isHttp || isHttps) return NS_OK;

    /* We have to always allow these, else forms and scrollbars break */
    PRBool isChrome = PR_FALSE, isResource = PR_FALSE;
    aContentLocation->SchemeIs ("chrome", &isChrome);
    aContentLocation->SchemeIs ("resource", &isResource);
    if (isChrome || isResource) return NS_OK;

    nsEmbedCString contentSpec;
    aContentLocation->GetSpec (contentSpec);
    if (strcmp (contentSpec.get(), "about:blank") == 0) return NS_OK;

    nsEmbedCString contentScheme;
    aContentLocation->GetScheme (contentScheme);

    /* first general lockdown check */
    if (mLocked &&
        !g_slist_find_custom (mSafeProtocols, contentScheme.get(), (GCompareFunc) strcmp))
    {
        *_retval = PR_FALSE;
    }
    return NS_OK;
}

/* boolean shouldProcess (in PRInt32 contentType, in nsIURI documentLocation, in nsISupports ctxt, in nsIDOMWindow window); */
NS_IMETHODIMP EphyContentPolicy::ShouldProcess(PRInt32 contentType,
                           nsIURI *documentLocation,
                           nsISupports *ctxt,
                           nsIDOMWindow *window,
                           PRBool *_retval)
{
    /* This is never called. */
    LOG ("ShouldProcess: this is quite unexpected!");

    *_retval = PR_TRUE;
    return NS_OK;
}
#endif /* MOZ_NSICONTENTPOLICY_VARIANT == 2 */