Source/WebCore/bindings/generic/BindingSecurity.cpp

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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#include "config.h"
#include "BindingSecurity.h"

#include "BindingState.h"
#include "DOMWindow.h"
#include "Document.h"
#include "Frame.h"
#include "HTMLFrameElementBase.h"
#include "HTMLParserIdioms.h"
#include "SecurityOrigin.h"
#include "Settings.h"

namespace WebCore {

static bool canAccessDocument(BindingState* state, Document* targetDocument, SecurityReportingOption reportingOption = ReportSecurityError)
{
    if (!targetDocument)
        return false;

    DOMWindow* active = activeDOMWindow(state);
    if (!active)
        return false;

    if (active->document()->securityOrigin()->canAccess(targetDocument->securityOrigin()))
        return true;

    if (reportingOption == ReportSecurityError)
        printErrorMessageForFrame(targetDocument->frame(), targetDocument->domWindow()->crossDomainAccessErrorMessage(active));

    return false;
}

bool BindingSecurity::shouldAllowAccessToDOMWindow(BindingState* state, DOMWindow* target, SecurityReportingOption reportingOption)
{
    return target && canAccessDocument(state, target->document(), reportingOption);
}

bool BindingSecurity::shouldAllowAccessToFrame(BindingState* state, Frame* target, SecurityReportingOption reportingOption)
{
    return target && canAccessDocument(state, target->document(), reportingOption);
}

bool BindingSecurity::shouldAllowAccessToNode(BindingState* state, Node* target)
{
    return target && canAccessDocument(state, target->document());
}

bool BindingSecurity::allowSettingFrameSrcToJavascriptUrl(BindingState* state, HTMLFrameElementBase* frame, const String& value)
{
    return !protocolIsJavaScript(stripLeadingAndTrailingHTMLSpaces(value)) || canAccessDocument(state, frame->contentDocument());
}

}