/* Copyright (C) 2003-2015 LiveCode Ltd.

This file is part of LiveCode.

LiveCode is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License v3 as published by the Free
Software Foundation.

LiveCode 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
for more details.

You should have received a copy of the GNU General Public License
along with LiveCode.  If not see <http://www.gnu.org/licenses/>.  */

#include "prefix.h"

#include "globdefs.h"
#include "parsedef.h"
#include "filedefs.h"
#include "objdefs.h"
#include "mcio.h"

#include "object.h"
#include "cdata.h"
#include "field.h"
#include "paragraf.h"

MCCdata::MCCdata() :
  id(0),
  data(nil)
{
}

MCCdata::MCCdata(const MCCdata &cref) :
  MCDLlist(cref)
{
	// Ensure that the paragraphs of the cloned data have their parent field
	// set to nil - this will catch attempts to use them without properly
	// setting the parent first.
	CloneData(cref, nil);
}

MCCdata::MCCdata(const MCCdata& cref, MCField* p_new_owner) :
  MCDLlist(cref)
{
	CloneData(cref, p_new_owner);
}

void MCCdata::CloneData(const MCCdata& cref, MCField* p_new_owner)
{
	id = cref.id;
	if (cref.data != NULL && cref.data != (void *)1)
	{
		if (id & COMPACT_PARAGRAPHS)
			data = strclone((char *)cref.data);
		else
		{
			MCParagraph *paragraphs = NULL;
			MCParagraph *tptr = (MCParagraph *)cref.data;
			do
			{
				// Clone the paragraph
				MCParagraph *newparagraph = new (nothrow) MCParagraph(*tptr);
				newparagraph->setparent(p_new_owner);
				
				newparagraph->appendto(paragraphs);
				tptr = (MCParagraph *)tptr->next();
			}
			while (tptr != cref.data);
			data = paragraphs;
		}
	}
	else
		data = cref.data;
}

MCCdata::MCCdata(uint4 newid)
{
	id = newid;
	data = NULL;
}

MCCdata::~MCCdata()
{
	if (data != NULL && data != (void *)1)
	{
		if (id & COMPACT_PARAGRAPHS)
			delete (char *)data;
		else
		{
			MCParagraph *paragraphs = (MCParagraph *)data;
			while (paragraphs != NULL)
			{
				MCParagraph *pptr = (MCParagraph *)paragraphs->remove
				                    (paragraphs);
				delete pptr;
			}
		}
	}
}

IO_stat MCCdata::load(IO_handle stream, MCObject *parent, uint32_t version)
{
	IO_stat stat;

	if ((stat = IO_read_uint4(&id, stream)) != IO_NORMAL)
		return checkloadstat(stat);
	if (parent->gettype() == CT_BUTTON)
	{
		uint1 set;
		stat = IO_read_uint1(&set, stream);
		data = reinterpret_cast<void *>(set ? 1 : 0);
		return checkloadstat(stat);
	}
	else
	{
		if (id & COMPACT_PARAGRAPHS)
		{
			// MW-2013-11-19: [[ UnicodeFileFormat ]] This flag is never set by newer engines
			//   so is just legacy.
			char *string;
			if ((stat = IO_read_cstring_legacy(string, stream, sizeof(uint1))) != IO_NORMAL)
				return checkloadstat(stat);
			data = string;
		}
		else
		{
			MCParagraph *paragraphs = NULL;
			while (True)
			{
				uint1 type;
				if ((stat = IO_read_uint1(&type, stream)) != IO_NORMAL)
					return checkloadstat(stat);
				switch (type)
				{
				// MW-2012-03-04: [[ StackFile5500 ]] Handle either the paragraph or extended
				//   paragraph tag.
				case OT_PARAGRAPH:
				case OT_PARAGRAPH_EXT:
					{
						MCParagraph *newpar = new (nothrow) MCParagraph;
						newpar->setparent((MCField *)parent);
						
						// MW-2012-03-04: [[ StackFile5500 ]] If the paragraph tab was the extended
						//   variant, then pass the correct is_ext parameter.
						if ((stat = newpar->load(stream, version, type == OT_PARAGRAPH_EXT)) != IO_NORMAL)
						{
							delete newpar;
							return checkloadstat(stat);
						}
						newpar->appendto(paragraphs);
					}
					break;
				default:
					data = paragraphs;
					MCS_seek_cur(stream, -1);
					return IO_NORMAL;
				}
			}
		}
	}
	return IO_NORMAL;
}

IO_stat MCCdata::save(IO_handle stream, Object_type type, uint4 p_part, MCObject *p_parent, uint32_t p_version)
{
	IO_stat stat;

	// If p_part is non-zero it means we only want to save data specific
	// to a given card. In this case, we simply don't save the rest.
	if (p_part != 0 && id != p_part)
		return IO_NORMAL;

	if ((stat = IO_write_uint1(type, stream)) != IO_NORMAL)
		return stat;
	if ((stat = IO_write_uint4(p_part != 0 ? 0 : id, stream)) != IO_NORMAL)
		return stat;
	if (type == OT_BDATA)
	{
		uint1 set = data ? 1 : 0;
		return IO_write_uint1(set, stream);
	}
	else
		if (id & COMPACT_PARAGRAPHS)
		{
			// MW-2013-11-19: [[ UnicodeFileFormat ]] This flag is never set by newer engines
			//   so is just legacy. (Indeed, this codepath should never be hit!).
			return IO_write_cstring_legacy((char *)data, stream, sizeof(uint1));
		}
		else
		{
			MCParagraph *tptr = (MCParagraph *)data;
			if (tptr != NULL)
				do
				{
                    // Ensure field's saved MCCdata paragraphs have a parent when needed
                    if (p_parent != nil)
                        tptr -> setparent(MCObjectCast<MCField>(p_parent));
					if ((stat = tptr->save(stream, p_part, p_version)) != IO_NORMAL)
						return stat;
					tptr = (MCParagraph *)tptr->next();
				}
				while (tptr != data);
		}
	return IO_NORMAL;
}

uint4 MCCdata::getid()
{
	return (id & ~COMPACT_PARAGRAPHS);
}

void MCCdata::setid(uint4 newid)
{
	id = newid | (id & COMPACT_PARAGRAPHS);
}

MCParagraph *MCCdata::getparagraphs()
{
	MCParagraph *paragraphs;
	if (id & COMPACT_PARAGRAPHS)
	{
		paragraphs = NULL;
		char *eptr = (char *)data;
		while ((eptr = strtok(eptr, "\n")) != NULL)
		{
			MCParagraph *tpgptr = new (nothrow) MCParagraph;
			tpgptr->appendto(paragraphs);
			uint2 l = strlen(eptr) + 1;
			/* UNCHECKED */ MCAutoPointer<char_t[]> sptr =
				new (nothrow) char_t[l];
			memcpy(sptr.Get(), eptr, l);
			MCAutoStringRef t_string;
			/* UNCHECKED */ MCStringCreateWithNativeChars(sptr.Get(), l,
			                                              &t_string);
			tpgptr->settext(*t_string);
			eptr = NULL;
		}
		delete (char *)data;
		data = paragraphs;
		id &= ~COMPACT_PARAGRAPHS;
	}
	if (data == NULL)
		data = paragraphs = new (nothrow) MCParagraph;
	else
		paragraphs = (MCParagraph *)data;
	return paragraphs;
}

void MCCdata::setparagraphs(MCParagraph *&newpar)
{
	id &= ~COMPACT_PARAGRAPHS;
	data = newpar;
}

Boolean MCCdata::getset()
{
	return data != NULL;
}

void MCCdata::setset(Boolean newset)
{
	data = (void *)(newset != 0);
}