/*
* Alabastra Project - C++ Editor writed with QT Library V.4 
* Copyright (C) Igor Maculan - geocronos@gmail.com
			Marco Buoncristiano - marco.buoncristiano@gmail.com
 
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* 
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#include "AlSearch.h"
#include <QMessageBox>

AlSearch::AlSearch(QWidget *parent,AlTextEdit *a_txt):QDialog(parent){
	ui.setupUi(this);
	if ( a_txt!=NULL)
	{
		txt=a_txt;
		connectSignal();
	}
	else
		close();
};

void AlSearch::setAlTextEdit(AlTextEdit *a_txt){
	if (a_txt!=NULL)
		txt=a_txt;
}

bool AlSearch::compare(AlTextEdit *a_txt){
	return a_txt==txt;
};

void AlSearch::connectSignal(){
	connect (ui.btnNext,SIGNAL(clicked()),this,SLOT(next()));
	connect (ui.btnPrev,SIGNAL(clicked()),this,SLOT(prev()));
	connect (ui.btnReplace,SIGNAL(clicked()),this,SLOT(replace()));
	connect (ui.btnReplaceAll,SIGNAL(clicked()),this,SLOT(replaceAll()));
	connect (ui.chkInSel,SIGNAL(stateChanged(int)),this,SLOT(setSelectionCursor(int)));
};

void AlSearch::prev(){
	search(ui.edtSearch->text(),true);
};

void AlSearch::next(){
	search(ui.edtSearch->text());
};

void AlSearch::setSelectionCursor(int) {
	if (ui.chkInSel->isChecked() )
	{
		if (txt->textCursor().hasSelection())
		{
			selCursor = txt->textCursor();
			qCur = selCursor;
		}
		else
			ui.chkInSel->setChecked(false);
	}
};

void AlSearch::search(QString src,bool back){
	
	if (ui.chkInSel->isChecked() && selCursor.hasSelection()){
		//Se c'e' qualcosa di selezionato
		if (ui.chkRegExp->isChecked())
			if (back)
				qCur=txt->document()->find(QRegExp(src),qCur,QTextDocument::FindBackward);
			else	
				qCur=txt->document()->find(QRegExp(src),qCur);
		else
			if (back)
				qCur=txt->document()->find(src,qCur,QTextDocument::FindBackward);
			else
				qCur=txt->document()->find(src,qCur);
				
		if (back){
			if (qCur.position()>selCursor.selectionStart())
				txt->setTextCursor(qCur);
			else{
				qCur.setPosition(selCursor.selectionEnd());
				if (selCursor.selectedText()!=ui.edtSearch->text())
					search(src,back);
			}
		}
		else{
			if (qCur.position()<selCursor.selectionEnd())
				txt->setTextCursor(qCur);
			else{
				qCur.setPosition(selCursor.selectionStart());
				if (selCursor.selectedText()!=ui.edtSearch->text())
					search(src,back);
			}
		}
	}
	if (!ui.chkInSel->isChecked())
		if (back)
			txt->find(src,QTextDocument::FindBackward);
		else
			txt->find(src);
};

void AlSearch::replace(){
	if (!txt->textCursor().hasSelection())
		next();
	if (txt->textCursor().hasSelection()){
		txt->textCursor().insertText(ui.edtReplace->text());
		next();
	}
};

void AlSearch::replaceAll(){
	QTextCursor q,curSave;
	curSave=txt->textCursor();
	q.setPosition(0);
	txt->setTextCursor(q);
	next();
	int i=0;
	while (txt->textCursor().hasSelection()){
		txt->textCursor().insertText(ui.edtReplace->text());
		next();
		i++;
	}
	txt->setTextCursor(curSave);
	QMessageBox::information(this,tr("Sostituisci Tutto"),tr("Sostituzioni effettuate:%1").arg(i));
};