/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbPlugins module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include <QGraphicsGridLayout>

#include <QGraphicsWidget>

#include <QString>

#include <QSignalMapper>

#include <HbMainWindow>

#include <hbgridview.h>

#include <hbwidget.h>

#include <hbdialog_p.h>

#include <HbPopup>

#include "hbinputthaispecialpopup.h"

const QString HbAbcButtonObjName = "Popup abc";

const int HbPopupAsteriskColumns = 5;

const int HbPopupAsteriskRows = 4;

const int HbPopupShiftColumns = 4;

const int HbPopupShiftRows = 3;

const int HBPopupEmptyButtonSeven = 7;

const int HBPopupEmptyButtonEight = 8;

const int HBPopupEmptyButtonNine = 9;

const QString HbPopupPortraitButtonTextLayout = "_hb_sctp_button_text_layout";

const QString HbPopupPortraitButtonIconLayout = "_hb_sctp_button_icon_layout";

/*!

@proto

@hbtouchinput

\class HbInputThaiSpecialPopup

\brief Implementation of Thai Special Popup.

Implementation of Thai Special Popup.

*/

/// @cond

class HbInputThaiSpecialPopupPrivate: public HbDialogPrivate

{

    Q_DECLARE_PUBLIC(HbInputThaiSpecialPopup)

public:

	//Character classes

	enum ThaiGlyphTypes {

		HbThaiCharCons,		//Thai consonant

		HbThaiCharLV,		//Leading vowel

		HbThaiCharFV1,		//Following vowel, type 1

		HbThaiCharFV2,		//Following vowel, type 2

		HbThaiCharFV3,		//Following vowel, type 3

		HbThaiCharBV1,		//Below vowel, type 1

		HbThaiCharBV2,		//Below vowel, type 2

		HbThaiCharBD,		//Below diacritic

		HbThaiCharTone,		//Tone mark

		HbThaiCharAD1,		//Above diacritic, type 1

		HbThaiCharAD2,		//Above diacritic, type 2

		HbThaiCharAD3,		//Above diacritic, type 3

		HbThaiCharAV1,		//Above vowel, type 1

		HbThaiCharAV2,		//Above vowel, type 2

		HbThaiCharAV3,		//Above vowel, type 3

		HbThaiCharNonThai	//Not a Thai letter

	};

	QGraphicsGridLayout* mButtonLayout; 

	QGraphicsWidget* mButtonWidget;

	QList<HbTouchKeypadButton *> mPopupButtons;

	QSignalMapper *mClickMapper;

	QString mSpecialCharacterSet;

	const HbKeymap *mKeymap;

	QSizeF mSize;

	int mButtonId;

	int mPopupGridColumns;

	int mPopupGridRows;

	int mNumPopupButtons;

	int mAbcButtonId;

	uint mPrevChar;

public:

	HbInputThaiSpecialPopupPrivate();

	~HbInputThaiSpecialPopupPrivate();

	void setNumberOfKeys();

	void createPopupButtons(int screenWidth, int screenHeight);

	void setLayoutDimensions(QSizeF dimensions);

	void getSpecialCharacters();

	void setPopupButtons(const QString &aCharSet);

	void applyEditorConstraints();

	int thaiGlyphType(uint prevChar);	

	void initializeAbcButton();	

	void handleStandardButtonClick(int buttonId);

	void _q_mappedKeyClick(int buttonid);	

};

HbInputThaiSpecialPopupPrivate::HbInputThaiSpecialPopupPrivate()

{

    // we should make sure that it comes above vkb

    setPriority(HbPopupPrivate::VirtualKeyboard + 1);

	mClickMapper = 0;

	mSize = QSizeF();

}

HbInputThaiSpecialPopupPrivate::~HbInputThaiSpecialPopupPrivate()

{

}

/*!

Sets number of keys to layout

*/

void HbInputThaiSpecialPopupPrivate::setNumberOfKeys()

{

	//Manipulate number of keys on the layout depending on the Key_Asterisk and Qt::Key_Shift

	if(Qt::Key_Asterisk == mButtonId) {

		mPopupGridColumns = HbPopupAsteriskColumns;

		mPopupGridRows = HbPopupAsteriskRows;

	}else if (Qt::Key_Shift == mButtonId) {

		mPopupGridColumns = HbPopupShiftColumns;

		mPopupGridRows = HbPopupShiftRows;

	}

	mNumPopupButtons = mPopupGridColumns * mPopupGridRows;

	mAbcButtonId = mPopupGridColumns*mPopupGridRows-1;

}

/*!

Create Popup Buttons

*/

void HbInputThaiSpecialPopupPrivate::createPopupButtons(int screenWidth, int screenHeight)

{

	Q_Q(HbInputThaiSpecialPopup);

	Q_UNUSED(q)

	if (mPopupButtons.size() == 0) {

        for (int i = 0; i < mNumPopupButtons; ++i) {

			HbTouchKeypadButton *button = new HbTouchKeypadButton(0,QString(""),0);

            q->connect(button, SIGNAL(clicked()), mClickMapper, SLOT(map()));

            mClickMapper->setMapping(button, i);

            mPopupButtons.append(button);

            button->setProperty(HbStyleRulesCacheId::hbStyleRulesForNodeCache, HbPopupPortraitButtonTextLayout);

        }

        for (int i = 0; i < mNumPopupButtons; ++i) {

			if(Qt::Key_Asterisk == mButtonId) {

				//This check is for logical separation between Above below vowels , Diacritics and Tone marks 

				//In Thai Language we have 7 Above and Below Vowels, 5 Diacritics and 4 Tone marks

				if(!(i == HBPopupEmptyButtonSeven || i== HBPopupEmptyButtonEight || i == HBPopupEmptyButtonNine)) {		

					mButtonLayout->addItem(mPopupButtons.at(i), i/mPopupGridColumns, i%mPopupGridColumns);

				}

			} else if (Qt::Key_Shift == mButtonId) {

				mButtonLayout->addItem(mPopupButtons.at(i), i/mPopupGridColumns, i%mPopupGridColumns);

			}

        }

    }

	//Set the Layout Dimensions

	setLayoutDimensions(QSizeF(screenWidth/mPopupGridColumns, screenHeight/mPopupGridRows));

	//Assign button layout to widget

	mButtonWidget->setLayout(mButtonLayout);	

}

/*!

This function defines the layout porperties for popup.

*/

void HbInputThaiSpecialPopupPrivate::setLayoutDimensions(QSizeF dimensions)

{

    // only update the dimensions if they are not previously set

    if (mSize == dimensions) {

        return;

    }

    mSize = dimensions;

    mButtonLayout->setContentsMargins(0.0, 0.0, 0.0, 0.0);

    for (int i = 0; i < mPopupGridColumns; i++) {

        mButtonLayout->setColumnFixedWidth(i, dimensions.width());

    }

    for (int i = 0; i < mPopupGridRows; i++) {

        mButtonLayout->setRowFixedHeight(i, dimensions.height());

    }

    mButtonLayout->setHorizontalSpacing(0.0);

    mButtonLayout->setVerticalSpacing(0.0);

	foreach (HbTouchKeypadButton* button, mPopupButtons) {

        if (button) {

            button->setInitialSize(dimensions);

        }

    }

}

/*!

Gets the special character sets from set keymapping.

*/

void HbInputThaiSpecialPopupPrivate::getSpecialCharacters()

{

    mSpecialCharacterSet.clear();

    if (mKeymap) {

		const HbKeyboardMap* keyboardMap = 0;

		//Set keyboard map depending on Key_Asterisk and Key_Shift

		if(Qt::Key_Asterisk == mButtonId) {

			keyboardMap = mKeymap->keyboard(HbKeyboardThaiStarSctPortrait);

		} else if(Qt::Key_Shift == mButtonId) {

			keyboardMap = mKeymap->keyboard(HbKeyboardThaiHashSctPortrait);

		}

        if (keyboardMap) {

            foreach (const HbMappedKey* mappedKey, keyboardMap->keys) {

				//Creats character set through keyboard map

                mSpecialCharacterSet.append(mappedKey->characters(HbModifierNone));

            }

        }

    }

}

/*!

Let's set Thai Special Character to Buttons

*/

void HbInputThaiSpecialPopupPrivate::setPopupButtons(const QString &aCharSet)

{

    int i = 0;

    int j = 0;

	for (; i < mPopupButtons.size()-1 && j < aCharSet.size(); ++i) {

		if(Qt::Key_Asterisk == mButtonId) {

			//This check is for logical separation between Above below Vowels , Diacritics and Tone marks 

			//In Thai Language we have 7 Above and Below Vowels, 5 Diacritics and 4 Tone marks

			if(!(i == HBPopupEmptyButtonSeven || i== HBPopupEmptyButtonEight || i == HBPopupEmptyButtonNine)) {

				const QChar &character = aCharSet[j];

				mPopupButtons.at(i)->setText(character);

				mPopupButtons.at(i)->setObjectName("Thai Sct portrait " + QString(character));

				j++;

			}

		} else if (Qt::Key_Shift == mButtonId) {

			const QChar &character = aCharSet[j];

			mPopupButtons.at(i)->setText(character);

			mPopupButtons.at(i)->setObjectName("Thai Sct portrait " + QString(character));

			j++;

		}

	}

    for (; i < mPopupButtons.size()-1; ++i) {       

            mPopupButtons.at(i)->setText("");       

    }

    applyEditorConstraints();

	initializeAbcButton();

}

/*!

Apply editor constraints on buttons

*/

void HbInputThaiSpecialPopupPrivate::applyEditorConstraints()

{	

	if (Qt::Key_Asterisk == mButtonId) {

		//Get Character class

		int glyphType = thaiGlyphType(mPrevChar);

		//Set the rules to the editor to allow or disallow characters 

		switch(glyphType) {

		case HbThaiCharNonThai:

		case HbThaiCharNon:

		case HbThaiCharLV:

		case HbThaiCharFV1:

		case HbThaiCharFV2:

		case HbThaiCharFV3:

		case HbThaiCharBD:

		case HbThaiCharTone:

		case HbThaiCharAD1:

		case HbThaiCharAD2:

		case HbThaiCharAD3:

			for (int i=0; i < mPopupButtons.size()-1; ++i) {					

				mPopupButtons.at(i)->setFade(true);     

			}

			break;

		case HbThaiCharCons:

			for (int i=0; i < mPopupButtons.size()-1; ++i) {					

				mPopupButtons.at(i)->setFade(false);     

			}

			break;

		case HbThaiCharAV1:

		case HbThaiCharBV1: {

				static const QChar data[6] = { 0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e4c, 0x0e4d };

				QString allowChar(data, 6);

				for (int i=0; i < mPopupButtons.size()-1; ++i) { 				

					QString buttonText = mPopupButtons.at(i)->text();

					if(buttonText.isEmpty()) {

						mPopupButtons.at(i)->setFade(true);

					} else {

						if (allowChar.contains(buttonText)) {

							mPopupButtons.at(i)->setFade(false);

						} else {

							mPopupButtons.at(i)->setFade(true);						

						}

					}

				}

			}

			break;

		case HbThaiCharAV2:

		case HbThaiCharBV2: {				

				static const QChar data[4] = { 0x0e48, 0x0e49, 0x0e4a, 0x0e4b };

				QString allowChar(data, 4);

				for (int i=0; i < mPopupButtons.size()-1; ++i) { 				

					QString buttonText = mPopupButtons.at(i)->text();

					if(buttonText.isEmpty()) {

						mPopupButtons.at(i)->setFade(true);

					} else {

						if (allowChar.contains(buttonText)) {

							mPopupButtons.at(i)->setFade(false);

						} else {

							mPopupButtons.at(i)->setFade(true);						

						}

					}

				}

			}

			break;

		case HbThaiCharAV3: {				

				static const QChar data[5] = { 0x0e48, 0x0e49, 0x0e4a, 0x0e4b, 0x0e47 };

				QString allowChar(data, 5);

				for (int i=0; i < mPopupButtons.size()-1; ++i) { 				

					QString buttonText = mPopupButtons.at(i)->text();

					if(buttonText.isEmpty()) {

						mPopupButtons.at(i)->setFade(true);

					} else {

						if (allowChar.contains(buttonText)) {

							mPopupButtons.at(i)->setFade(false);

						} else {

							mPopupButtons.at(i)->setFade(true);						

						}

					}

				}

			}

			break;

		default:

			break;

		}

	}

}

/*!

Returns Character classes depending on the previous entered character

*/

int HbInputThaiSpecialPopupPrivate::thaiGlyphType(uint prevChar)

{

	if (prevChar >= 0x0E01 && prevChar <= 0x0E2E && prevChar != 0x0E24 && prevChar != 0x0E26 ) {

		return(HbThaiCharCons);

	} else if (prevChar >= 0x0E40 && prevChar <= 0x0E44) {

		return(HbThaiCharLV);

	} else if (prevChar == 0x0E30 || prevChar == 0x0E32 || prevChar == 0x0E33) {

		return(HbThaiCharFV1);

	} else if (prevChar == 0x0E45) {

		return(HbThaiCharFV2);

	} else if (prevChar == 0x0E24 || prevChar == 0x0E26) {

		return(HbThaiCharFV3);

	} else if (prevChar == 0x0E38) {

		return(HbThaiCharBV1);

	} else if (prevChar == 0x0E39) {

		return(HbThaiCharBV2);

	} else if (prevChar == 0x0E3A) {

		return(HbThaiCharBD);

	} else if (prevChar >= 0x0E48 && prevChar <= 0x0E4B) {

		return(HbThaiCharTone);

	} else if (prevChar == 0x0E4C || prevChar == 0x0E4D) {

		return(HbThaiCharAD1);

	} else if (prevChar == 0x0E47) {

		return(HbThaiCharAD2);

	} else if (prevChar == 0x0E4E) {

		return(HbThaiCharAD3);

	} else if (prevChar == 0x0E34) {

		return(HbThaiCharAV1);

	} else if (prevChar == 0x0E31 || prevChar == 0x0E36) {

		return(HbThaiCharAV2);

	} else if (prevChar == 0x0E35 || prevChar == 0x0E37) {

		return(HbThaiCharAV3);

	} else {

		return(HbThaiCharNonThai);

	}

}

/*!

Initialize ABC button

*/

void HbInputThaiSpecialPopupPrivate::initializeAbcButton()

{

	mPopupButtons.at(mAbcButtonId)->setIcon(HbIcon("qtg_mono_alpha_mode"));

    mPopupButtons.at(mAbcButtonId)->setObjectName(HbAbcButtonObjName); 

    mPopupButtons.at(mAbcButtonId)->setObjectName(HbAbcButtonObjName); 

    mPopupButtons.at(mAbcButtonId)->setProperty(HbStyleRulesCacheId::hbStyleRulesForNodeCache, HbPopupPortraitButtonIconLayout);

	mPopupButtons.at(mAbcButtonId)->setButtonType(HbTouchKeypadButton::HbTouchButtonFunction);

    mPopupButtons.at(mAbcButtonId)->setBackgroundAttributes(HbTouchKeypadButton::HbTouchButtonReleased);    

}

/*!

Handles button clicks.

*/

void HbInputThaiSpecialPopupPrivate::handleStandardButtonClick(int buttonId)

{

   Q_Q(HbInputThaiSpecialPopup);

   if (buttonId >= 0 && buttonId < mNumPopupButtons-1 ) {

	   QString buttonText = mPopupButtons.at(buttonId)->text();

		//Emit the signal when button is not faded and it has some text

	   if (!mPopupButtons.at(buttonId)->isFaded() && buttonText.length() > 0) {

		   emit q->chrSelected(buttonText.at(0));

	   }

   }

   //It will hide popup for any click event

   q->hide();

}

/*!

Handles virtual key clicks

*/

void HbInputThaiSpecialPopupPrivate::_q_mappedKeyClick(int buttonid)

{

    handleStandardButtonClick(buttonid);

}

/// @endcond

/*!

Constructs the object. 

*/

HbInputThaiSpecialPopup::HbInputThaiSpecialPopup(int buttonId, uint prevChar, QGraphicsItem* parent)

    : HbDialog(*new HbInputThaiSpecialPopupPrivate(), parent)

{

    Q_D(HbInputThaiSpecialPopup);

	//Initialize member variable

	d->mPrevChar = prevChar;

	d->mButtonId = buttonId;

#if QT_VERSION >= 0x040600

    // Make sure the Thai special popup never steals focus.

    setFlag(QGraphicsItem::ItemIsPanel, true);

    setActive(false);

#endif

	// set dialog properties

    setFocusPolicy(Qt::ClickFocus);

    setBackgroundFaded(false);

	setDismissPolicy(TapAnywhere);

    setTimeout(NoTimeout);

	d->mButtonLayout = new QGraphicsGridLayout();

    d->mButtonLayout->setSpacing(0.0);

    d->mButtonLayout->setContentsMargins(0.0, 0.0, 0.0, 0.0);

	d->mButtonWidget =  new QGraphicsWidget();

	//Create Signal mapper

	d->mClickMapper = new QSignalMapper(this);

	// let's connect buttons to handle click events  

    connect(d->mClickMapper, SIGNAL(mapped(int)), this, SLOT(_q_mappedKeyClick(int)));

}

/*!

Destructs the object.

*/

HbInputThaiSpecialPopup::~HbInputThaiSpecialPopup()

{

}

/*!

This function should be called when ever there is a Key_Asterisk and Key_Shift click happens.

This create buttons, Set the layout dimensions and gets the special characters from the given keymappings and set it accordingly.

*/

void HbInputThaiSpecialPopup::setPopupLayout(const HbKeymap* keymap, uint prevChar, int buttonId, int screenWidth, int screenHeight)

{

    Q_D(HbInputThaiSpecialPopup);

	if(d->mButtonId != buttonId) {

		d->mButtonId = buttonId;

		while (!d->mPopupButtons.isEmpty())

			delete d->mPopupButtons.takeFirst();

	}

	d->mKeymap = keymap;

	d->mPrevChar = prevChar;	

	//Initialize Number of keys dependent on Key_Asterisk and Key_Shift

	d->setNumberOfKeys();

	//Create buttons.

	d->createPopupButtons(screenWidth,screenHeight);

	//Gets the special character sets from set keymapping.

    d->getSpecialCharacters();

	//Let's set Special Character Table Buttons

	d->setPopupButtons(d->mSpecialCharacterSet);

	setContentWidget(d->mButtonWidget);

}

/*!

This a virtual functions in QGraphicsWidget. It is called whenever the Thai popup is shown. 

*/

void HbInputThaiSpecialPopup::showEvent( QShowEvent * event )

{

	HbDialog::showEvent(event);