/*
 * Copyright (C) 2010 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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.
 */

#ifndef PluginController_h
#define PluginController_h

#include <wtf/Forward.h>

#if PLATFORM(COCOA)
#include "PluginComplexTextInputState.h"
#endif

struct NPObject;
typedef struct _NPVariant NPVariant;
typedef void* NPIdentifier;

namespace WebCore {
    class HTTPHeaderMap;
    class IntRect;
    class URL;
    class ProtectionSpace;
}

namespace WebKit {

class PluginController {
public:
    // Returns false if the plugin has explicitly been hidden. Returns true otherwise (even if the plugin is currently obscured from view on screen.)
    virtual bool isPluginVisible() = 0;

    // Tells the controller that the plug-in wants the given rect to be repainted. The rect is in the plug-in's coordinate system.
    virtual void invalidate(const WebCore::IntRect&) = 0;

    // Returns the user agent string.
    virtual String userAgent() = 0;

    // Loads the given URL and associates it with the request ID.
    // 
    // If a target is specified, then the URL will be loaded in the window or frame that the target refers to.
    // Once the URL finishes loading, Plugin::frameDidFinishLoading will be called with the given requestID. If the URL
    // fails to load, Plugin::frameDidFailToLoad will be called.
    //
    // If the URL is a JavaScript URL, the JavaScript code will be evaluated and the result sent back using Plugin::didEvaluateJavaScript.
    virtual void loadURL(uint64_t requestID, const String& method, const String& urlString, const String& target, 
                         const WebCore::HTTPHeaderMap& headerFields, const Vector<uint8_t>& httpBody, bool allowPopups) = 0;

    /// Cancels the load of a stream that was requested by loadURL.
    virtual void cancelStreamLoad(uint64_t streamID) = 0;

    // Cancels the load of the manual stream.
    virtual void cancelManualStreamLoad() = 0;

#if ENABLE(NETSCAPE_PLUGIN_API)
    // Get the NPObject that corresponds to the window JavaScript object. Returns a retained object.
    virtual NPObject* windowScriptNPObject() = 0;

    // Get the NPObject that corresponds to the plug-in's element. Returns a retained object.
    virtual NPObject* pluginElementNPObject() = 0;

    // Evaluates the given script string in the context of the given NPObject.
    virtual bool evaluate(NPObject*, const String& scriptString, NPVariant* result, bool allowPopups) = 0;
#endif

    // Set the statusbar text.
    virtual void setStatusbarText(const String&) = 0;

    // Return whether accelerated compositing is enabled.
    virtual bool isAcceleratedCompositingEnabled() = 0;

    // Tells the controller that the plug-in process has crashed.
    virtual void pluginProcessCrashed() = 0;
    
    // Tells the controller that we're about to dispatch an event to the plug-in.
    virtual void willSendEventToPlugin() = 0;
    
#if PLATFORM(COCOA)
    // Tells the controller that the plug-in focus or window focus did change.
    virtual void pluginFocusOrWindowFocusChanged(bool) = 0;

    // Tells the controller that complex text input be enabled or disabled for the plug-in.
    virtual void setComplexTextInputState(PluginComplexTextInputState) = 0;

    // Returns the mach port of the compositing render server.
    virtual mach_port_t compositingRenderServerPort() = 0;

    // Open the preference pane for this plug-in (as stated in the plug-in's Info.plist).
    virtual void openPluginPreferencePane() = 0;
#endif

    // Returns the contents scale factor.
    virtual float contentsScaleFactor() = 0;

    // Returns the proxies for the given URL or null on failure.
    virtual String proxiesForURL(const String&) = 0;

    // Returns the cookies for the given URL or null on failure.
    virtual String cookiesForURL(const String&) = 0;

    // Sets the cookies for the given URL.
    virtual void setCookiesForURL(const String& urlString, const String& cookieString) = 0;

    // Get authentication credentials for the given protection space.
    virtual bool getAuthenticationInfo(const WebCore::ProtectionSpace&, String& username, String& password) = 0;

    // Returns whether private browsing is enabled.
    virtual bool isPrivateBrowsingEnabled() = 0;
    
    // Returns whether or not asynchronous plugin initialization is enabled.
    virtual bool asynchronousPluginInitializationEnabled() const { return false; }
    
    // Returns whether or not asynchronous plugin initialization should be attempted for all plugins.
    virtual bool asynchronousPluginInitializationEnabledForAllPlugins() const { return false; }
    
    // Returns the articifical plugin delay to use for testing of asynchronous plugin initialization.
    virtual bool artificialPluginInitializationDelayEnabled() const { return false; }

    // Increments a counter that prevents the plug-in from being destroyed.
    virtual void protectPluginFromDestruction() = 0;

    // Decrements a counter that, when it reaches 0, stops preventing the plug-in from being destroyed.
    virtual void unprotectPluginFromDestruction() = 0;

#if PLUGIN_ARCHITECTURE(X11)
    // Create a plugin container for windowed plugins
    virtual uint64_t createPluginContainer() = 0;
    virtual void windowedPluginGeometryDidChange(const WebCore::IntRect& frameRect, const WebCore::IntRect& clipRect, uint64_t windowID) = 0;
    virtual void windowedPluginVisibilityDidChange(bool isVisible, uint64_t windowID) = 0;
#endif

    // Called when the a plug-in instance is successfully initialized, either synchronously or asynchronously.
    virtual void didInitializePlugin() = 0;
    
    // Called when the a plug-in instance fails to initialized, either synchronously or asynchronously.
    virtual void didFailToInitializePlugin() = 0;

    // Helper class for delaying destruction of a plug-in.
    class PluginDestructionProtector {
    public:
        explicit PluginDestructionProtector(PluginController* pluginController)
            : m_pluginController(pluginController)
        {
            m_pluginController->protectPluginFromDestruction();
        }
        
        ~PluginDestructionProtector()
        {
            m_pluginController->unprotectPluginFromDestruction();
        }
        
    private:
        PluginController* m_pluginController;
    };
    
protected:
    virtual ~PluginController() { }
};

} // namespace WebKit

#endif // PluginController_h