/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */

/* libwpg

 * Version: MPL 2.0 / LGPLv2.1+

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * Major Contributor(s):

 * Copyright (C) 2006 Ariya Hidayat (ariya@kde.org)

 * Copyright (C) 2004 Marc Oude Kotte (marc@solcon.nl)

 * Copyright (C) 2005 Fridrich Strba (fridrich.strba@bluewin.ch)

 *

 * For minor contributions see the git repository.

 *

 * Alternatively, the contents of this file may be used under the terms

 * of the GNU Lesser General Public License Version 2.1 or later

 * (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are

 * applicable instead of those above.

 *

 * For further information visit http://libwpg.sourceforge.net

 */

/* "This product is not manufactured, approved, or supported by

 * Corel Corporation or Corel Corporation Limited."

 */

#include "WPGXParser.h"

#include "libwpg_utils.h"

namespace

{

static void separateTabsAndInsertText(librevenge::RVNGDrawingInterface *iface, const librevenge::RVNGString &text)

{

	if (!iface || text.empty())

		return;

	librevenge::RVNGString tmpText;

	librevenge::RVNGString::Iter i(text);

	for (i.rewind(); i.next();)

	{

		if (*(i()) == '\t')

		{

			if (!tmpText.empty())

			{

				if (iface)

					iface->insertText(tmpText);

				tmpText.clear();

			}

			if (iface)

				iface->insertTab();

		}

		else if (*(i()) == '\n')

		{

			if (!tmpText.empty())

			{

				if (iface)

					iface->insertText(tmpText);

				tmpText.clear();

			}

			if (iface)

				iface->insertLineBreak();

		}

		else

		{

			tmpText.append(i());

		}

	}

	if (iface && !tmpText.empty())

		iface->insertText(tmpText);

}

static void separateSpacesAndInsertText(librevenge::RVNGDrawingInterface *iface, const librevenge::RVNGString &text)

{

	if (!iface)

		return;

	if (text.empty())

	{

		iface->insertText(text);

		return;

	}

	librevenge::RVNGString tmpText;

	int numConsecutiveSpaces = 0;

	librevenge::RVNGString::Iter i(text);

	for (i.rewind(); i.next();)

	{

		if (*(i()) == ' ')

			numConsecutiveSpaces++;

		else

			numConsecutiveSpaces = 0;

		if (numConsecutiveSpaces > 1)

		{

			if (!tmpText.empty())

			{

				separateTabsAndInsertText(iface, tmpText);

				tmpText.clear();

			}

			if (iface)

				iface->insertSpace();

		}

		else

		{

			tmpText.append(i());

		}

	}

	separateTabsAndInsertText(iface, tmpText);

}

} // anonymous namespace

WPGXParser::WPGXParser(librevenge::RVNGInputStream *input, librevenge::RVNGDrawingInterface *painter):

	m_input(input), m_painter(painter), m_colorPalette(std::map<int,libwpg::WPGColor>())

{

}

WPGXParser::WPGXParser(const WPGXParser &parser):

	m_input(parser.m_input), m_painter(parser.m_painter),

	m_colorPalette(parser.m_colorPalette)

{

}

unsigned char WPGXParser::readU8()

{

	if (!m_input || m_input->isEnd())

		return (unsigned char)0;

	unsigned long numBytesRead;

	unsigned char const *p = m_input->read(1, numBytesRead);

	if (p && numBytesRead == 1)

		return *(unsigned char const *)(p);

	return (unsigned char)0;

}

unsigned short WPGXParser::readU16()

{

	unsigned short p0 = (unsigned short)readU8();

	unsigned short p1 = (unsigned short)readU8();

	return (unsigned short)(p0|(p1<<8));

}

unsigned int WPGXParser::readU32()

{

	unsigned int p0 = (unsigned int)readU8();

	unsigned int p1 = (unsigned int)readU8();

	unsigned int p2 = (unsigned int)readU8();

	unsigned int p3 = (unsigned int)readU8();

	return (unsigned int)(p0|(p1<<8)|(p2<<16)|(p3<<24));

}

short WPGXParser::readS16()

{

	return (short)readU16();

}

int WPGXParser::readS32()

{

	return (int)readU32();

}

unsigned int WPGXParser::readVariableLengthInteger()

{

	// read a byte

	unsigned char value8 = readU8();

	// if it's in the range 0-0xFE, then we have a 8-bit value

	if (value8<=0xFE)

	{

		return (unsigned int)value8;

	}

	else

	{

		// now read a 16 bit value

		unsigned short value16 = readU16();

		// if the MSB is 1, we have a 32 bit value

		if (value16>>15)

		{

			// read the next 16 bit value (LSB part, in value16 resides the MSB part)

			unsigned long lvalue16 = readU16();

			unsigned long value32 = value16 & 0x7fff;  // mask out the MSB

			return (unsigned int)((value32<<16)+lvalue16);

		}

		else

		{

			// we have a 16 bit value, return it

			return (unsigned int)value16;

		}

	}

}

WPGXParser &WPGXParser::operator=(const WPGXParser &parser)

{

	if (this != &parser)

	{

		m_input = parser.m_input;

		m_painter = parser.m_painter;

		m_colorPalette = parser.m_colorPalette;

	}

	return *this;

}

void WPGTextDataHandler::openParagraph(const librevenge::RVNGPropertyList &propList)

{

	m_painter->openParagraph(propList);

}

void WPGTextDataHandler::closeParagraph()

{

	m_painter->closeParagraph();

}

void WPGTextDataHandler::openSpan(const librevenge::RVNGPropertyList &propList)

{

	m_painter->openSpan(propList);

}

void WPGTextDataHandler::closeSpan()

{

	m_painter->closeSpan();

}

void WPGTextDataHandler::insertTab()

{

	m_painter->insertTab();

}

void WPGTextDataHandler::insertSpace()

{

	m_painter->insertSpace();

}

void WPGTextDataHandler::insertText(const librevenge::RVNGString &text)

{

	separateSpacesAndInsertText(m_painter, text);

}

void WPGTextDataHandler::insertLineBreak()

{

	m_painter->insertLineBreak();

}

void WPGTextDataHandler::openListElement(const librevenge::RVNGPropertyList &propList)

{

	m_painter->openListElement(propList);

}

void WPGTextDataHandler::closeListElement()

{

	m_painter->closeListElement();

}

/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */