/*
 * Copyright (C) 2005, 2006, 2007 Apple, Inc.  All rights reserved.
 *           (C) 2007 Graham Dennis (graham.dennis@gmail.com)
 *           (C) 2007 Eric Seidel <eric@webkit.org>
 *
 * 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. 
 * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
 */

#import "config.h"
#import "DumpRenderTreePasteboard.h"

#if PLATFORM(MAC)

#import "DumpRenderTreeMac.h"
#import "NSPasteboardAdditions.h"
#import <objc/runtime.h>
#import <wtf/Assertions.h>
#import <wtf/HashMap.h>
#import <wtf/ListHashSet.h>
#import <wtf/Lock.h>
#import <wtf/RetainPtr.h>

@interface LocalPasteboard : NSPasteboard {
    RetainPtr<id> _owner;
    RetainPtr<NSString> _pasteboardName;
    RetainPtr<NSArray<NSPasteboardItem *>> _cachedPasteboardItems;
    NSInteger _changeCount;

    ListHashSet<RetainPtr<CFStringRef>, WTF::RetainPtrObjectHash<CFStringRef>> _types;
    ListHashSet<RetainPtr<CFStringRef>, WTF::RetainPtrObjectHash<CFStringRef>> _originalTypes;
    HashMap<RetainPtr<CFStringRef>, RetainPtr<CFDataRef>, WTF::RetainPtrObjectHash<CFStringRef>, WTF::RetainPtrObjectHashTraits<CFStringRef>> _data;
}

-(id)initWithName:(NSString *)name;
@end

static Lock localPasteboardsLock;
static RetainPtr<NSMutableDictionary> localPasteboards WTF_GUARDED_BY_LOCK(localPasteboardsLock);

@implementation DumpRenderTreePasteboard

// Return a local pasteboard so we don't disturb the real pasteboards when running tests.
+ (NSPasteboard *)_pasteboardWithName:(NSString *)name
{
    Locker locker { localPasteboardsLock };
    static uint64_t number WTF_GUARDED_BY_LOCK(localPasteboardsLock) = 0;
    if (!name)
        name = [NSString stringWithFormat:@"LocalPasteboard%llu", ++number];
    if (!localPasteboards)
        localPasteboards = adoptNS([[NSMutableDictionary alloc] init]);
    if (LocalPasteboard *pasteboard = [localPasteboards objectForKey:name])
        return pasteboard;
    auto pasteboard = adoptNS([[LocalPasteboard alloc] initWithName:name]);
    [localPasteboards setObject:pasteboard.get() forKey:name];
    return pasteboard.get();
}

+ (void)releaseLocalPasteboards
{
    Locker locker { localPasteboardsLock };
    localPasteboards = nil;
}

// Convenience method for JS so that it doesn't have to try and create a NSArray on the objc side instead
// of the usual WebScriptObject that is passed around
- (NSInteger)declareType:(NSString *)type owner:(id)newOwner
{
    return [self declareTypes:@[type] owner:newOwner];
}

@end

@implementation LocalPasteboard

+ (id)alloc
{
    // Need to skip NSPasteboard's alloc, which does not allocate an object.
    return class_createInstance(self, 0);
}

- (id)initWithName:(NSString *)name
{
    self = [super init];
    if (!self)
        return nil;

    _pasteboardName = adoptNS([name copy]);

    return self;
}

- (NSString *)name
{
    return _pasteboardName.get();
}

- (void)releaseGlobally
{
}

- (NSInteger)declareTypes:(NSArray *)newTypes owner:(id)newOwner
{
    [self _clearContentsWithoutUpdatingChangeCount];

    [self _addTypesWithoutUpdatingChangeCount:newTypes owner:newOwner];
    return ++_changeCount;
}

static bool isUTI(NSString *type)
{
    return UTTypeIsDynamic((__bridge CFStringRef)type) || UTTypeIsDeclared((__bridge CFStringRef)type);
}

static RetainPtr<CFStringRef> toUTI(NSString *type)
{
    if (isUTI(type)) {
        // This is already a UTI.
        return adoptCF(CFStringCreateCopy(nullptr, (__bridge CFStringRef)type));
    }

    return adoptCF(UTTypeCreatePreferredIdentifierForTag(kUTTagClassNSPboardType, (__bridge CFStringRef)type, nullptr));
}

- (void)_clearContentsWithoutUpdatingChangeCount
{
    _cachedPasteboardItems = nil;
    _types.clear();
    _originalTypes.clear();
    _data.clear();
}

- (NSInteger)clearContents
{
    [self _clearContentsWithoutUpdatingChangeCount];
    return ++_changeCount;
}

- (NSInteger)addTypes:(NSArray<NSPasteboardType> *)newTypes owner:(id)newOwner
{
    auto previousOwner = _owner;
    [self _addTypesWithoutUpdatingChangeCount:newTypes owner:newOwner];
    if (previousOwner != newOwner)
        ++_changeCount;
    return _changeCount;
}

- (void)_addTypesWithoutUpdatingChangeCount:(NSArray *)newTypes owner:(id)newOwner
{
    _owner = newOwner;

    for (NSString *type in newTypes) {
        _types.add(toUTI(type));
        _originalTypes.add((__bridge CFStringRef)type);
    }
}

- (NSInteger)changeCount
{
    return _changeCount;
}

- (NSArray *)types
{
    auto types = adoptNS([[NSMutableArray alloc] init]);

    for (const auto& type : _types) {
        [types addObject:(__bridge NSString *)type.get()];

        // Include the pasteboard type as well.
        if (auto pasteboardType = adoptNS((__bridge NSString *)UTTypeCopyPreferredTagWithClass(type.get(), kUTTagClassNSPboardType)))
            [types addObject:pasteboardType.get()];
    }

    return types.autorelease();
}

- (NSString *)availableTypeFromArray:(NSArray *)types
{
    for (NSString *type in types) {
        if (_types.contains((__bridge CFStringRef)type))
            return type;
    }

    return nil;
}

- (BOOL)setData:(NSData *)data forType:(NSString *)dataType
{
    auto uti = toUTI(dataType);

    if (!_types.contains(uti))
        return NO;

    _data.set(WTFMove(uti), (__bridge CFDataRef)(data ?: [NSData data]));
    return YES;
}

- (NSData *)dataForType:(NSString *)dataType
{
    if (NSData *data = (__bridge NSData *)_data.get(toUTI(dataType).get()).get())
        return data;

    if (_owner && [_owner respondsToSelector:@selector(pasteboard:provideDataForType:)])
        [_owner pasteboard:self provideDataForType:dataType];

    return (__bridge NSData *)_data.get(toUTI(dataType).get()).get();
}

- (BOOL)setPropertyList:(id)propertyList forType:(NSString *)dataType
{
    NSData *data = nil;
    if (propertyList)
        data = [NSPropertyListSerialization dataWithPropertyList:propertyList format:NSPropertyListXMLFormat_v1_0 options:0 error:nullptr];
    return [self setData:data forType:dataType];
}

- (BOOL)setString:(NSString *)string forType:(NSString *)dataType
{
    return [self setData:[string dataUsingEncoding:NSUTF8StringEncoding] forType:dataType];
}

- (BOOL)writeObjects:(NSArray<id <NSPasteboardWriting>> *)objects
{
    auto items = adoptNS([[NSMutableArray<NSPasteboardItem *> alloc] initWithCapacity:objects.count]);
    for (id <NSPasteboardWriting> object in objects) {
        ASSERT([object isKindOfClass:NSPasteboardItem.class]);
        [items addObject:(NSPasteboardItem *)object];
        for (NSString *type in [object writableTypesForPasteboard:self]) {
            [self addTypes:@[ type ] owner:self];

            id propertyList = [object pasteboardPropertyListForType:type];
            if ([propertyList isKindOfClass:NSData.class])
                [self setData:propertyList forType:type];
            else
                ASSERT_NOT_REACHED();
        }
    }

    _cachedPasteboardItems = items.get();
    return YES;
}

- (NSArray<NSPasteboardItem *> *)pasteboardItems
{
    if (_cachedPasteboardItems)
        return _cachedPasteboardItems.get();

    auto item = adoptNS([[NSPasteboardItem alloc] init]);
    for (auto& type : _originalTypes) {
        if (!_data.contains(toUTI((__bridge NSString *)type.get())))
            [_owner pasteboard:self provideDataForType:(__bridge NSString *)type.get()];
    }

    for (const auto& typeAndData : _data) {
        NSData *data = (__bridge NSData *)typeAndData.value.get();
        NSString *type = (__bridge NSString *)typeAndData.key.get();
        [item setData:data forType:[NSPasteboard _modernPasteboardType:type]];
    }

    _cachedPasteboardItems = @[ item.get() ];
    return _cachedPasteboardItems.get();
}

@end

#endif // PLATFORM(MAC)