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#import <WebKit/npapi.h>

#import <WebKit/npfunctions.h>

#import <WebKit/npruntime.h>

#import <Cocoa/Cocoa.h>

#import "MenuHandler.h"

// Browser function table

static NPNetscapeFuncs* browser;

// Structure for per-instance storage

typedef struct PluginObject

{

    NPP npp;

    NPWindow window;

    NSString *string;

    bool hasFocus;

    bool mouseIsInsidePlugin;

    MenuHandler *menuHandler;

} PluginObject;

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16_t mode, int16_t argc, char* argn[], char* argv[], NPSavedData* saved);

NPError NPP_Destroy(NPP instance, NPSavedData** save);

NPError NPP_SetWindow(NPP instance, NPWindow* window);

NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16_t* stype);

NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason);

int32_t NPP_WriteReady(NPP instance, NPStream* stream);

int32_t NPP_Write(NPP instance, NPStream* stream, int32_t offset, int32_t len, void* buffer);

void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname);

void NPP_Print(NPP instance, NPPrint* platformPrint);

int16_t NPP_HandleEvent(NPP instance, void* event);

void NPP_URLNotify(NPP instance, const char* URL, NPReason reason, void* notifyData);

NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value);

NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value);

#pragma export on

// Mach-o entry points

NPError NP_Initialize(NPNetscapeFuncs *browserFuncs);

NPError NP_GetEntryPoints(NPPluginFuncs *pluginFuncs);

void NP_Shutdown(void);

#pragma export off

NPError NP_Initialize(NPNetscapeFuncs* browserFuncs)

{

    browser = browserFuncs;

    return NPERR_NO_ERROR;

}

NPError NP_GetEntryPoints(NPPluginFuncs* pluginFuncs)

{

    pluginFuncs->version = 11;

    pluginFuncs->size = sizeof(pluginFuncs);

    pluginFuncs->newp = NPP_New;

    pluginFuncs->destroy = NPP_Destroy;

    pluginFuncs->setwindow = NPP_SetWindow;

    pluginFuncs->newstream = NPP_NewStream;

    pluginFuncs->destroystream = NPP_DestroyStream;

    pluginFuncs->asfile = NPP_StreamAsFile;

    pluginFuncs->writeready = NPP_WriteReady;

    pluginFuncs->write = (NPP_WriteProcPtr)NPP_Write;

    pluginFuncs->print = NPP_Print;

    pluginFuncs->event = NPP_HandleEvent;

    pluginFuncs->urlnotify = NPP_URLNotify;

    pluginFuncs->getvalue = NPP_GetValue;

    pluginFuncs->setvalue = NPP_SetValue;

    return NPERR_NO_ERROR;

}

void NP_Shutdown(void)

{

}

NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16_t mode, int16_t argc, char* argn[], char* argv[], NPSavedData* saved)

{

    // Create per-instance storage

    PluginObject *obj = (PluginObject *)malloc(sizeof(PluginObject));

    bzero(obj, sizeof(PluginObject));

    obj->npp = instance;

    instance->pdata = obj;

    // Ask the browser if it supports the CoreGraphics drawing model

    NPBool supportsCoreGraphics;

    if (browser->getvalue(instance, NPNVsupportsCoreGraphicsBool, &supportsCoreGraphics) != NPERR_NO_ERROR)

        supportsCoreGraphics = FALSE;

    if (!supportsCoreGraphics)

        return NPERR_INCOMPATIBLE_VERSION_ERROR;

    // If the browser supports the CoreGraphics drawing model, enable it.

    browser->setvalue(instance, NPPVpluginDrawingModel, (void *)NPDrawingModelCoreGraphics);

    // If the browser supports the Cocoa event model, enable it.

    NPBool supportsCocoa;

    if (browser->getvalue(instance, NPNVsupportsCocoaBool, &supportsCocoa) != NPERR_NO_ERROR)

        supportsCocoa = FALSE;

    if (!supportsCocoa)

        return NPERR_INCOMPATIBLE_VERSION_ERROR;

    browser->setvalue(instance, NPPVpluginEventModel, (void *)NPEventModelCocoa);

    return NPERR_NO_ERROR;

}

NPError NPP_Destroy(NPP instance, NPSavedData** save)

{

    // Free per-instance storage

    PluginObject *obj = instance->pdata;

    [obj->string release];

    [obj->menuHandler release];

    free(obj);

    return NPERR_NO_ERROR;

}

NPError NPP_SetWindow(NPP instance, NPWindow* window)

{

    PluginObject *obj = instance->pdata;

    obj->window = *window;

    return NPERR_NO_ERROR;

}

NPError NPP_NewStream(NPP instance, NPMIMEType type, NPStream* stream, NPBool seekable, uint16_t* stype)

{

    *stype = NP_ASFILEONLY;

    return NPERR_NO_ERROR;

}

NPError NPP_DestroyStream(NPP instance, NPStream* stream, NPReason reason)

{

    return NPERR_NO_ERROR;

}

int32_t NPP_WriteReady(NPP instance, NPStream* stream)

{

    return 0;

}

int32_t NPP_Write(NPP instance, NPStream* stream, int32_t offset, int32_t len, void* buffer)

{

    return 0;

}

void NPP_StreamAsFile(NPP instance, NPStream* stream, const char* fname)

{

}

void NPP_Print(NPP instance, NPPrint* platformPrint)

{

}

static void handleDraw(PluginObject *obj, NPCocoaEvent *event)

{

    NSGraphicsContext *oldContext = [[NSGraphicsContext currentContext] retain];

    NSGraphicsContext *context = [NSGraphicsContext graphicsContextWithGraphicsPort:event->data.draw.context

                                                                            flipped:YES];

    [NSGraphicsContext setCurrentContext:context];

    NSRect rect = NSMakeRect(0, 0, obj->window.width, obj->window.height);

    [[NSColor lightGrayColor] set];

    [NSBezierPath fillRect:rect];

    // If the plugin has focus, draw a focus indicator

    if (obj->hasFocus) {

        [[NSColor blackColor] set];

        NSBezierPath *path = [NSBezierPath bezierPathWithRect:rect];

        [path setLineWidth:5];

        [path stroke];

    }

    [obj->string drawAtPoint:NSMakePoint(10, 10) withAttributes:nil];

    [NSGraphicsContext setCurrentContext:oldContext];

}

static NSString *eventType(NPCocoaEventType type)

{

    switch (type) {

        case NPCocoaEventScrollWheel:

            return @"NPCocoaEventScrollWheel";

        case NPCocoaEventMouseDown:

            return @"NPCocoaEventMouseDown";

        case NPCocoaEventMouseUp:

            return @"NPCocoaEventMouseUp";            

        case NPCocoaEventMouseMoved:

            return @"NPCocoaEventMouseMoved";            

        case NPCocoaEventMouseDragged:

            return @"NPCocoaEventMouseDragged";            

        case NPCocoaEventMouseEntered:

            return @"NPCocoaEventMouseEntered";            

        case NPCocoaEventMouseExited:

            return @"NPCocoaEventMouseExited";

        case NPCocoaEventKeyDown:

            return @"NPCocoaEventKeyDown";

        case NPCocoaEventKeyUp:

            return @"NPCocoaEventKeyUp";

        case NPCocoaEventFlagsChanged:

            return @"NPCocoaEventFlagsChanged";

        default:

            return @"unknown";

    }    

}

static void invalidatePlugin(PluginObject *obj)

{

    NPRect rect;

    rect.left = 0;

    rect.top = 0;

    rect.right = obj->window.width;

    rect.bottom = obj->window.height;

    browser->invalidaterect(obj->npp, &rect);    

}

static void handleMouseEvent(PluginObject *obj, NPCocoaEvent *event)

{

    NSString *string = [NSString stringWithFormat:@"Type: %@\n"

                                                   "Modifier flags: 0x%x\n"

                                                   "Coordinates: (%g, %g)\n"

                                                   "Button number: %d\n"

                                                   "Click count: %d\n"

                                                   "Delta: (%g, %g, %g)",

                                                   eventType(event->type), 

                                                   event->data.mouse.modifierFlags,

                                                   event->data.mouse.pluginX,

                                                   event->data.mouse.pluginY,

                                                   event->data.mouse.buttonNumber,

                                                   event->data.mouse.clickCount,

                                                   event->data.mouse.deltaX, event->data.mouse.deltaY, event->data.mouse.deltaZ];

    [obj->string release];

    obj->string = [string retain];

    invalidatePlugin(obj);

    if (event->data.mouse.buttonNumber == 1) {

        if (!obj->menuHandler)

            obj->menuHandler = [[MenuHandler alloc] initWithBrowserFuncs:browser instance:obj->npp];

        browser->popupcontextmenu(obj->npp, (NPNSMenu *)[obj->menuHandler menu]);

    }

}

static void handleKeyboardEvent(PluginObject *obj, NPCocoaEvent *event)

{

    NSString *string = [NSString stringWithFormat:@"Type: %@\n"

                        "Modifier flags: 0x%x\n"

                        "Characters: %@\n"

                        "Characters ignoring modifiers: %@\n"

                        "Is a repeat: %@\n"

                        "Key code: %d",

                        eventType(event->type), 

                        event->data.key.modifierFlags,

                        event->data.key.characters,

                        event->data.key.charactersIgnoringModifiers,

                        event->data.key.isARepeat ? @"YES" : @"NO",

                        event->data.key.keyCode];

    [obj->string release];

    obj->string = [string retain];

    invalidatePlugin(obj);

}

int16_t NPP_HandleEvent(NPP instance, void* event)

{

    PluginObject *obj = instance->pdata;

    NPCocoaEvent *cocoaEvent = event;

    switch(cocoaEvent->type) {

        case NPCocoaEventFocusChanged:

            obj->hasFocus = cocoaEvent->data.focus.hasFocus;

            invalidatePlugin(obj);

            return 1;

        case NPCocoaEventDrawRect:

            handleDraw(obj, cocoaEvent);

            return 1;

        case NPCocoaEventKeyDown:

        case NPCocoaEventKeyUp:

        case NPCocoaEventFlagsChanged:

            handleKeyboardEvent(obj, cocoaEvent);

            return 1;

        case NPCocoaEventMouseDown:

        case NPCocoaEventMouseUp:

        // FIXME: NPCocoaEventMouseMoved is currently disabled in order to see other events more clearly

        // without "drowning" in mouse moved events.

//        case NPCocoaEventMouseMoved:

        case NPCocoaEventMouseEntered:

        case NPCocoaEventMouseExited:

        case NPCocoaEventMouseDragged:

        case NPCocoaEventScrollWheel:

            handleMouseEvent(obj, cocoaEvent);

            return 1;

    }

    return 0;

}

void NPP_URLNotify(NPP instance, const char* url, NPReason reason, void* notifyData)

{

}

NPError NPP_GetValue(NPP instance, NPPVariable variable, void *value)

{

    return NPERR_GENERIC_ERROR;

}

NPError NPP_SetValue(NPP instance, NPNVariable variable, void *value)

{

    return NPERR_GENERIC_ERROR;

}