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// Copyright (c) 2009 Stephen Deken
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * 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.
// * Neither the name KeyCastr 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT OWNER OR 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 "KCKeystrokeTransformer.h"
#import "KCKeystroke.h"

@interface KCKeystrokeTransformer (Private)

-(NSDictionary*) _shiftedSpecialKeys;
-(NSDictionary*) _specialKeys;

@end


@implementation KCKeystrokeTransformer

static NSString* kCommandKeyString = nil;
static NSString* kAltKeyString = nil;
static NSString* kControlKeyString = nil;
static NSString* kShiftKeyString = nil;

#define UTF8(x) [NSString stringWithUTF8String:x]
#define NSNum(x) [NSNumber numberWithInt:x]

+(void) load
{
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
kControlKeyString = [[NSString stringWithUTF8String:"\xe2\x8c\x83\x01"] retain];
kAltKeyString = [[NSString stringWithUTF8String:"\xe2\x8c\xa5\x01"] retain];
kCommandKeyString = [[NSString stringWithUTF8String:"\xe2\x8c\x98\x01"] retain];
kShiftKeyString = [[NSString stringWithUTF8String:"\xe2\x87\xa7\x01"] retain];
[pool release];
}

+(BOOL) allowsReverseTransformation
{
return NO;
}

+(Class) transformedValueClass
{
return [NSString class];
}

+(KCKeystrokeTransformer*) sharedTransformer
{
static KCKeystrokeTransformer* xformer = nil;
if (xformer == nil)
{
xformer = [[KCKeystrokeTransformer alloc] init];
}
return xformer;
}

-(NSDictionary*) _shiftedSpecialKeys
{
static NSDictionary *d = nil;
if (d == nil)
{
d = [[NSDictionary alloc] initWithObjectsAndKeys:
UTF8("\xe2\x87\xa4"), NSNum(48), // tab
nil];
}
return d;
}

-(NSDictionary*) _specialKeys
{
static NSDictionary *d = nil;
if (d == nil)
{
d = [[NSDictionary alloc] initWithObjectsAndKeys:
UTF8("\xe2\x87\xa1"), NSNum(126), // up
UTF8("\xe2\x87\xa3"), NSNum(125), // down
UTF8("\xe2\x87\xa2"), NSNum(124), // right
UTF8("\xe2\x87\xa0"), NSNum(123), // left
UTF8("\xe2\x87\xa5"), NSNum(48), // tab
UTF8("\xe2\x8e\x8b"), NSNum(53), // escape
UTF8("\xe2\x8e\x8b"), NSNum(71), // escape
UTF8("\xe2\x8c\xab"), NSNum(51), // delete
UTF8("\xe2\x8c\xa6"), NSNum(117), // forward delete
UTF8("?\xe2\x83\x9d"), NSNum(114), // help
UTF8("\xe2\x86\x96"), NSNum(115), // home
UTF8("\xe2\x86\x98"), NSNum(119), // end
UTF8("\xe2\x87\x9e"), NSNum(116), // pgup
UTF8("\xe2\x87\x9f"), NSNum(121), // pgdn
UTF8("\xe2\x86\xa9"), NSNum(36), // return
UTF8("\xe2\x86\xa9"), NSNum(76), // numpad enter
UTF8("F1"), NSNum(122), // F1
UTF8("F2"), NSNum(120), // F2
UTF8("F3"), NSNum(99), // F3
UTF8("F4"), NSNum(118), // F4
UTF8("F5"), NSNum(96), // F5
UTF8("F6"), NSNum(97), // F6
UTF8("F7"), NSNum(98), // F7
UTF8("F8"), NSNum(100), // F8
UTF8("F9"), NSNum(101), // F9
UTF8("F10"), NSNum(109), // F10
UTF8("F11"), NSNum(103), // F11
UTF8("F12"), NSNum(111), // F12
UTF8("F13"), NSNum(105), // F13
UTF8("F14"), NSNum(107), // F14
UTF8("F15"), NSNum(113), // F15
UTF8("F16"), NSNum(106), // F16
UTF8("\xe2\x90\xa3\xe2\x80\x8b"), NSNum(49), // space
nil];
}
return d;
}

-(id) transformedValue:(id)value
{
KCKeystroke* v = (KCKeystroke*)value;
NSMutableString* s = [NSMutableString string];

uint32_t _modifiers = [v modifiers];
uint16_t _keyCode = [v keyCode];
uint16_t _charCode = [v charCode];

BOOL isShifted = NO;
BOOL needsShiftGlyph = NO;
BOOL isCommand = NO;

if (_modifiers & NSControlKeyMask)
{
isCommand = YES;
[s appendString:kControlKeyString];
}
if (_modifiers & NSAlternateKeyMask)
{
isCommand = YES;
[s appendString:kAltKeyString];
}
if (_modifiers & NSShiftKeyMask)
{
isShifted = YES;
if (isCommand)
[s appendString:kShiftKeyString];
else
needsShiftGlyph = YES;
}
if (_modifiers & NSCommandKeyMask)
{
if (needsShiftGlyph)
{
[s appendString:kShiftKeyString];
needsShiftGlyph = NO;
}
isCommand = YES;
[s appendString:kCommandKeyString];
}

if (isShifted)
{
id tmp = [[self _shiftedSpecialKeys] objectForKey:NSNum(_keyCode)];
if (tmp != nil)
{
[s appendString:tmp];
return s;
}
}

id tmp = [[self _specialKeys] objectForKey:NSNum(_keyCode)];
if (tmp != nil)
{
if (needsShiftGlyph)
[s appendString:[NSString stringWithUTF8String:"\xe2\x87\xa7\x01"]];
[s appendString:tmp];

return s;
}

[s appendString:[NSString stringWithCharacters:&_charCode length:1]];

// If this is a command string, put it in uppercase.
if (isCommand)
{
NSMutableString *t = [[s uppercaseString] mutableCopy];
s = t;
}

return s;
}

@end
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