/*

 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#import "CDataTransferer.h"

#import "ThreadUtilities.h"

#import "jni_util.h" 

#import <Cocoa/Cocoa.h>

#import <JavaNativeFoundation/JavaNativeFoundation.h>

@interface CClipboard : NSObject { }

@property NSInteger changeCount;

@property jobject clipboardOwner;

+ (CClipboard*)sharedClipboard;

- (void)declareTypes:(NSArray *)types withOwner:(jobject)owner jniEnv:(JNIEnv*)env;

- (void)checkPasteboard:(id)sender;

@end

@implementation CClipboard

@synthesize changeCount = _changeCount;

@synthesize clipboardOwner = _clipboardOwner;

// Clipboard creation is synchronized at the Java level

+ (CClipboard*)sharedClipboard {

    static CClipboard* sClipboard = nil;

    if (sClipboard == nil) {

        sClipboard = [[CClipboard alloc] init];

        [[NSNotificationCenter defaultCenter] addObserver:sClipboard selector: @selector(checkPasteboard:)

                                                     name: NSApplicationDidBecomeActiveNotification

                                                   object: nil];

    }

    return sClipboard;

}

- (id)init {

    if (self = [super init]) {

        self.changeCount = [[NSPasteboard generalPasteboard] changeCount];

    }

    return self;

}

- (void)declareTypes:(NSArray*)types withOwner:(jobject)owner jniEnv:(JNIEnv*)env {

    @synchronized(self) {

        if (owner != NULL) {

            if (self.clipboardOwner != NULL) {

                JNFDeleteGlobalRef(env, self.clipboardOwner);

            }

            self.clipboardOwner = JNFNewGlobalRef(env, owner);

        }

    }

    [ThreadUtilities performOnMainThreadWaiting:YES block:^() {

        self.changeCount = [[NSPasteboard generalPasteboard] declareTypes:types owner:self];

    }];

}

- (void)checkPasteboard:(id)sender {

    // This is called via NSApplicationDidBecomeActiveNotification.

    // If the change count on the general pasteboard is different than when we set it

    // someone else put data on the clipboard.  That means the current owner lost ownership.

    NSInteger newChangeCount = [[NSPasteboard generalPasteboard] changeCount];

    if (self.changeCount != newChangeCount) {

        self.changeCount = newChangeCount;

        // Notify that the content might be changed

        static JNF_CLASS_CACHE(jc_CClipboard, "sun/lwawt/macosx/CClipboard");

        static JNF_STATIC_MEMBER_CACHE(jm_contentChanged, jc_CClipboard, "notifyChanged", "()V");

        JNIEnv *env = [ThreadUtilities getJNIEnv];

        JNFCallStaticVoidMethod(env, jm_contentChanged);

        // If we have a Java pasteboard owner, tell it that it doesn't own the pasteboard anymore.

        static JNF_MEMBER_CACHE(jm_lostOwnership, jc_CClipboard, "notifyLostOwnership", "()V");

        @synchronized(self) {

            if (self.clipboardOwner) {

                JNIEnv *env = [ThreadUtilities getJNIEnv];

                JNFCallVoidMethod(env, self.clipboardOwner, jm_lostOwnership); // AWT_THREADING Safe (event)

                JNFDeleteGlobalRef(env, self.clipboardOwner);

                self.clipboardOwner = NULL;

            }

        }

    }

}

- (BOOL) checkPasteboardWithoutNotification:(id)application {

    AWT_ASSERT_APPKIT_THREAD;

    NSInteger newChangeCount = [[NSPasteboard generalPasteboard] changeCount];

    if (self.changeCount != newChangeCount) {

        self.changeCount = newChangeCount;    

        return YES;

    } else {

        return NO;

    }

}

@end

/*

 * Class:     sun_lwawt_macosx_CClipboard

 * Method:    declareTypes

 * Signature: ([JLsun/awt/datatransfer/SunClipboard;)V

*/

JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CClipboard_declareTypes

(JNIEnv *env, jobject inObject, jlongArray inTypes, jobject inJavaClip)

{

JNF_COCOA_ENTER(env);

    jint i;

    jint nElements = (*env)->GetArrayLength(env, inTypes);

    NSMutableArray *formatArray = [NSMutableArray arrayWithCapacity:nElements];

    jlong *elements = (*env)->GetPrimitiveArrayCritical(env, inTypes, NULL);

    for (i = 0; i < nElements; i++) {

        NSString *pbFormat = formatForIndex(elements[i]);

        if (pbFormat)

            [formatArray addObject:pbFormat];

    }

    (*env)->ReleasePrimitiveArrayCritical(env, inTypes, elements, JNI_ABORT);

    [[CClipboard sharedClipboard] declareTypes:formatArray withOwner:inJavaClip jniEnv:env];

JNF_COCOA_EXIT(env);

}

/*

 * Class:     sun_lwawt_macosx_CClipboard

 * Method:    setData

 * Signature: ([BJ)V

*/

JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CClipboard_setData

(JNIEnv *env, jobject inObject, jbyteArray inBytes, jlong inFormat)

{

    if (inBytes == NULL) {

        return;

    }

JNF_COCOA_ENTER(env);

    jint nBytes = (*env)->GetArrayLength(env, inBytes);

    jbyte *rawBytes = (*env)->GetPrimitiveArrayCritical(env, inBytes, NULL);

    CHECK_NULL(rawBytes);

    NSData *bytesAsData = [NSData dataWithBytes:rawBytes length:nBytes];

    (*env)->ReleasePrimitiveArrayCritical(env, inBytes, rawBytes, JNI_ABORT);

    NSString *format = formatForIndex(inFormat);

    [ThreadUtilities performOnMainThreadWaiting:YES block:^() {

        [[NSPasteboard generalPasteboard] setData:bytesAsData forType:format];

    }];

JNF_COCOA_EXIT(env);

}

/*

 * Class:     sun_lwawt_macosx_CClipboard

 * Method:    getClipboardFormats

 * Signature: (J)[J

     */

JNIEXPORT jlongArray JNICALL Java_sun_lwawt_macosx_CClipboard_getClipboardFormats

(JNIEnv *env, jobject inObject)

{

    jlongArray returnValue = NULL;

JNF_COCOA_ENTER(env);

    __block NSArray* dataTypes;

    [ThreadUtilities performOnMainThreadWaiting:YES block:^() {

        dataTypes = [[[NSPasteboard generalPasteboard] types] retain];

    }];

    [dataTypes autorelease];

    NSUInteger nFormats = [dataTypes count];

    NSUInteger knownFormats = 0;

    NSUInteger i;

    // There can be any number of formats on the general pasteboard.  Find out which ones

    // we know about (i.e., live in the flavormap.properties).

    for (i = 0; i < nFormats; i++) {

        NSString *format = (NSString *)[dataTypes objectAtIndex:i];

        if (indexForFormat(format) != -1)

            knownFormats++;

    }

    returnValue = (*env)->NewLongArray(env, knownFormats);

    if (returnValue == NULL) {

        return NULL;

    }

    if (knownFormats == 0) {

        return returnValue;

    }

    // Now go back and map the formats we found back to Java indexes.

    jboolean isCopy;

    jlong *lFormats = (*env)->GetLongArrayElements(env, returnValue, &isCopy);

    jlong *saveFormats = lFormats;

    for (i = 0; i < nFormats; i++) {

        NSString *format = (NSString *)[dataTypes objectAtIndex:i];

        jlong index = indexForFormat(format);

        if (index != -1) {

            *lFormats = index;

            lFormats++;

        }

    }

    (*env)->ReleaseLongArrayElements(env, returnValue, saveFormats, JNI_COMMIT);

JNF_COCOA_EXIT(env);

    return returnValue;

}

/*

 * Class:     sun_lwawt_macosx_CClipboard

 * Method:    getClipboardData

 * Signature: (JJ)[B

     */

JNIEXPORT jbyteArray JNICALL Java_sun_lwawt_macosx_CClipboard_getClipboardData

(JNIEnv *env, jobject inObject, jlong format)

{

    jbyteArray returnValue = NULL;

    // Note that this routine makes no attempt to interpret the data, since we're returning

    // a byte array back to Java.  CDataTransferer will do that if necessary.

JNF_COCOA_ENTER(env);

    NSString *formatAsString = formatForIndex(format);

    __block NSData* clipData;

    [ThreadUtilities performOnMainThreadWaiting:YES block:^() {

        clipData = [[[NSPasteboard generalPasteboard] dataForType:formatAsString] retain];

    }];

    if (clipData == NULL) {

        [JNFException raise:env as:"java/io/IOException" reason:"Font transform has NaN position"];

        return NULL;

    } else {

        [clipData autorelease];

    }

    NSUInteger dataSize = [clipData length];

    returnValue = (*env)->NewByteArray(env, dataSize);

    if (returnValue == NULL) {

        return NULL;

    }

    if (dataSize != 0) {

        const void *dataBuffer = [clipData bytes];

        (*env)->SetByteArrayRegion(env, returnValue, 0, dataSize, (jbyte *)dataBuffer);

    }

JNF_COCOA_EXIT(env);

    return returnValue;

}

/*                                                                                            

 * Class:     sun_lwawt_macosx_CClipboard                                                     

 * Method:    checkPasteboard                                                                 

 * Signature: ()V                                                                             

 */                                                                                           

JNIEXPORT jboolean JNICALL Java_sun_lwawt_macosx_CClipboard_checkPasteboardWithoutNotification

(JNIEnv *env, jobject inObject)                                                               

{                                                                                             

    __block BOOL ret = NO;                                                                    

    JNF_COCOA_ENTER(env);                                                                     

    [ThreadUtilities performOnMainThreadWaiting:YES block:^(){                                

        ret = [[CClipboard sharedClipboard] checkPasteboardWithoutNotification:nil];          

    }];                                                                                       

    JNF_COCOA_EXIT(env);                                                                      

    return ret;                                                                               

}