lyx_mirror/src/frontends/qt4/GuiPrefs.cpp

/**
 * \file GuiPrefs.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author John Levon
 * \author Bo Peng
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "GuiPrefs.h"

#include "ColorCache.h"
#include "FileDialog.h"
#include "GuiApplication.h"
#include "GuiFontExample.h"
#include "GuiFontLoader.h"
#include "GuiKeySymbol.h"
#include "qt_helpers.h"
#include "Validator.h"

#include "Author.h"
#include "BufferList.h"
#include "Color.h"
#include "ColorSet.h"
#include "ConverterCache.h"
#include "FontEnums.h"
#include "FuncRequest.h"
#include "KeyMap.h"
#include "KeySequence.h"
#include "Language.h"
#include "LyXAction.h"
#include "LyX.h"
#include "PanelStack.h"
#include "Session.h"
#include "SpellChecker.h"

#include "support/debug.h"
#include "support/FileName.h"
#include "support/filetools.h"
#include "support/gettext.h"
#include "support/lassert.h"
#include "support/lstrings.h"
#include "support/Messages.h"
#include "support/os.h"
#include "support/Package.h"

#include "graphics/GraphicsTypes.h"

#include "frontends/alert.h"
#include "frontends/Application.h"
#include "frontends/FontLoader.h"

#include <QAbstractItemModel>
#include <QCheckBox>
#include <QColorDialog>
#include <QFontDatabase>
#include <QHeaderView>
#include <QLineEdit>
#include <QMessageBox>
#include <QPixmapCache>
#include <QPushButton>
#include <QSpinBox>
#include <QString>
#include <QTreeWidget>
#include <QTreeWidgetItem>
#include <QValidator>

#include <iomanip>
#include <sstream>
#include <algorithm>

using namespace Ui;

using namespace std;
using namespace lyx::support;
using namespace lyx::support::os;

namespace lyx {
namespace frontend {

/////////////////////////////////////////////////////////////////////
//
// Browser Helpers
//
/////////////////////////////////////////////////////////////////////

/** Launch a file dialog and return the chosen file.
	filename: a suggested filename.
	title: the title of the dialog.
	filters: *.ps etc.
	dir1 = (name, dir), dir2 = (name, dir): extra buttons on the dialog.
*/
QString browseFile(QString const & filename,
	QString const & title,
	QStringList const & filters,
	bool save = false,
	QString const & label1 = QString(),
	QString const & dir1 = QString(),
	QString const & label2 = QString(),
	QString const & dir2 = QString(),
	QString const & fallback_dir = QString())
{
	QString lastPath = ".";
	if (!filename.isEmpty())
		lastPath = onlyPath(filename);
	else if(!fallback_dir.isEmpty())
		lastPath = fallback_dir;

	FileDialog dlg(title);
	dlg.setButton2(label1, dir1);
	dlg.setButton2(label2, dir2);

	FileDialog::Result result;

	if (save)
		result = dlg.save(lastPath, filters, onlyFileName(filename));
	else
		result = dlg.open(lastPath, filters, onlyFileName(filename));

	return result.second;
}


/** Wrapper around browseFile which tries to provide a filename
*  relative to the user or system directory. The dir, name and ext
*  parameters have the same meaning as in the
*  support::LibFileSearch function.
*/
QString browseLibFile(QString const & dir,
	QString const & name,
	QString const & ext,
	QString const & title,
	QStringList const & filters)
{
	// FIXME UNICODE
	QString const label1 = qt_("System files|#S#s");
	QString const dir1 =
		toqstr(addName(package().system_support().absFileName(), fromqstr(dir)));

	QString const label2 = qt_("User files|#U#u");
	QString const dir2 =
		toqstr(addName(package().user_support().absFileName(), fromqstr(dir)));

	QString const result = browseFile(toqstr(
		libFileSearch(dir, name, ext).absFileName()),
		title, filters, false, dir1, dir2, QString(), QString(), dir1);

	// remove the extension if it is the default one
	QString noextresult;
	if (getExtension(result) == ext)
		noextresult = removeExtension(result);
	else
		noextresult = result;

	// remove the directory, if it is the default one
	QString const file = onlyFileName(noextresult);
	if (toqstr(libFileSearch(dir, file, ext).absFileName()) == result)
		return file;
	else
		return noextresult;
}


/** Launch a file dialog and return the chosen directory.
	pathname: a suggested pathname.
	title: the title of the dialog.
	dir1 = (name, dir), dir2 = (name, dir): extra buttons on the dialog.
*/
QString browseDir(QString const & pathname,
	QString const & title,
	QString const & label1 = QString(),
	QString const & dir1 = QString(),
	QString const & label2 = QString(),
	QString const & dir2 = QString())
{
	QString lastPath = ".";
	if (!pathname.isEmpty())
		lastPath = onlyPath(pathname);

	FileDialog dlg(title);
	dlg.setButton1(label1, dir1);
	dlg.setButton2(label2, dir2);

	FileDialog::Result const result =
		dlg.opendir(lastPath, onlyFileName(pathname));

	return result.second;
}


} // namespace frontend


QString browseRelToParent(QString const & filename, QString const & relpath,
	QString const & title, QStringList const & filters, bool save,
	QString const & label1, QString const & dir1,
	QString const & label2, QString const & dir2)
{
	QString const fname = makeAbsPath(filename, relpath);

	QString const outname =
		frontend::browseFile(fname, title, filters, save, label1, dir1, label2, dir2);

	QString const reloutname =
		toqstr(makeRelPath(qstring_to_ucs4(outname), qstring_to_ucs4(relpath)));

	if (reloutname.startsWith("../"))
		return outname;
	else
		return reloutname;
}


QString browseRelToSub(QString const & filename, QString const & relpath,
	QString const & title, QStringList const & filters, bool save,
	QString const & label1, QString const & dir1,
	QString const & label2, QString const & dir2)
{
	QString const fname = makeAbsPath(filename, relpath);

	QString const outname =
		frontend::browseFile(fname, title, filters, save, label1, dir1, label2, dir2);

	QString const reloutname =
		toqstr(makeRelPath(qstring_to_ucs4(outname), qstring_to_ucs4(relpath)));

	QString testname = reloutname;
	testname.remove(QRegExp("^(\\.\\./)+"));

	if (testname.contains("/"))
		return outname;
	else
		return reloutname;
}



/////////////////////////////////////////////////////////////////////
//
// Helpers
//
/////////////////////////////////////////////////////////////////////

namespace frontend {

QString const catLookAndFeel = N_("Look & Feel");
QString const catEditing = N_("Editing");
QString const catLanguage = N_("Language Settings");
QString const catOutput = N_("Output");
QString const catFiles = N_("File Handling");

static void parseFontName(QString const & mangled0,
	string & name, string & foundry)
{
	string mangled = fromqstr(mangled0);
	size_t const idx = mangled.find('[');
	if (idx == string::npos || idx == 0) {
		name = mangled;
		foundry.clear();
	} else {
		name = mangled.substr(0, idx - 1),
		foundry = mangled.substr(idx + 1, mangled.size() - idx - 2);
	}
}


static void setComboxFont(QComboBox * cb, string const & family,
	string const & foundry)
{
	QString fontname = toqstr(family);
	if (!foundry.empty())
		fontname += " [" + toqstr(foundry) + ']';

	for (int i = 0; i != cb->count(); ++i) {
		if (cb->itemText(i) == fontname) {
			cb->setCurrentIndex(i);
			return;
		}
	}

	// Try matching without foundry name

	// We count in reverse in order to prefer the Xft foundry
	for (int i = cb->count(); --i >= 0;) {
		string name, foundry;
		parseFontName(cb->itemText(i), name, foundry);
		if (compare_ascii_no_case(name, family) == 0) {
			cb->setCurrentIndex(i);
			return;
		}
	}

	// family alone can contain e.g. "Helvetica [Adobe]"
	string tmpname, tmpfoundry;
	parseFontName(toqstr(family), tmpname, tmpfoundry);

	// We count in reverse in order to prefer the Xft foundry
	for (int i = cb->count(); --i >= 0; ) {
		string name, foundry;
		parseFontName(cb->itemText(i), name, foundry);
		if (compare_ascii_no_case(name, foundry) == 0) {
			cb->setCurrentIndex(i);
			return;
		}
	}

	// Bleh, default fonts, and the names couldn't be found. Hack
	// for bug 1063.

	QFont font;

	QString const font_family = toqstr(family);
	if (font_family == guiApp->romanFontName()) {
		font.setStyleHint(QFont::Serif);
		font.setFamily(font_family);
	} else if (font_family == guiApp->sansFontName()) {
		font.setStyleHint(QFont::SansSerif);
		font.setFamily(font_family);
	} else if (font_family == guiApp->typewriterFontName()) {
		font.setStyleHint(QFont::TypeWriter);
		font.setFamily(font_family);
	} else {
		LYXERR0("FAILED to find the default font: '"
		       << foundry << "', '" << family << '\'');
		return;
	}

	QFontInfo info(font);
	string default_font_name, dummyfoundry;
	parseFontName(info.family(), default_font_name, dummyfoundry);
	LYXERR0("Apparent font is " << default_font_name);

	for (int i = 0; i < cb->count(); ++i) {
		LYXERR0("Looking at " << cb->itemText(i));
		if (compare_ascii_no_case(fromqstr(cb->itemText(i)),
				    default_font_name) == 0) {
			cb->setCurrentIndex(i);
			return;
		}
	}

	LYXERR0("FAILED to find the font: '"
	       << foundry << "', '" << family << '\'');
}


/////////////////////////////////////////////////////////////////////
//
// StrftimeValidator
//
/////////////////////////////////////////////////////////////////////

class StrftimeValidator : public QValidator
{
public:
	StrftimeValidator(QWidget *);
	QValidator::State validate(QString & input, int & pos) const;
};


StrftimeValidator::StrftimeValidator(QWidget * parent)
	: QValidator(parent)
{
}


QValidator::State StrftimeValidator::validate(QString & input, int & /*pos*/) const
{
	if (is_valid_strftime(fromqstr(input)))
		return QValidator::Acceptable;
	else
		return QValidator::Intermediate;
}


/////////////////////////////////////////////////////////////////////
//
// PrefOutput
//
/////////////////////////////////////////////////////////////////////

PrefOutput::PrefOutput(GuiPreferences * form)
	: PrefModule(catOutput, N_("General"), form)
{
	setupUi(this);

	DateED->setValidator(new StrftimeValidator(DateED));
	dviCB->setValidator(new NoNewLineValidator(dviCB));
	pdfCB->setValidator(new NoNewLineValidator(pdfCB));

	connect(DateED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(plaintextLinelengthSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(overwriteCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(dviCB, SIGNAL(editTextChanged(QString)),
		this, SIGNAL(changed()));
	connect(pdfCB, SIGNAL(editTextChanged(QString)),
		this, SIGNAL(changed()));
	connect(printerPaperTypeED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(printerLandscapeED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(printerPaperSizeED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	printerPaperTypeED->setValidator(new NoNewLineValidator(printerPaperTypeED));
	printerLandscapeED->setValidator(new NoNewLineValidator(printerLandscapeED));
	printerPaperSizeED->setValidator(new NoNewLineValidator(printerPaperSizeED));

	dviCB->addItem("");
	dviCB->addItem("xdvi -sourceposition '$$n:\\ $$t' $$o");
	dviCB->addItem("yap -1 -s \"$$n $$t\" $$o");
	dviCB->addItem("okular --unique \"$$o#src:$$n $$f\"");
	dviCB->addItem("synctex view -i $$n:0:$$t -o $$o -x \"evince -i %{page+1} $$o\"");
	pdfCB->addItem("");
	pdfCB->addItem("CMCDDE SUMATRA control [ForwardSearch(\\\"$$o\\\",\\\"$$t\\\",$$n,0,0,1)]");
	pdfCB->addItem("SumatraPDF -reuse-instance \"$$o\" -forward-search \"$$t\" $$n");
	pdfCB->addItem("synctex view -i $$n:0:$$t -o $$o -x \"xpdf -raise -remote $$t.tmp $$o %{page+1}\"");
	pdfCB->addItem("okular --unique \"$$o#src:$$n $$f\"");
	pdfCB->addItem("qpdfview --unique \"$$o#src:$$f:$$n:0\"");
	pdfCB->addItem("synctex view -i $$n:0:$$t -o $$o -x \"evince -i %{page+1} $$o\"");
	pdfCB->addItem("/Applications/Skim.app/Contents/SharedSupport/displayline $$n $$o $$t");
}


void PrefOutput::on_DateED_textChanged(const QString &)
{
	QString t = DateED->text();
	int p = 0;
	bool valid = DateED->validator()->validate(t, p)
		     == QValidator::Acceptable;
	setValid(DateLA, valid);
}


void PrefOutput::applyRC(LyXRC & rc) const
{
	rc.date_insert_format = fromqstr(DateED->text());
	rc.plaintext_linelen = plaintextLinelengthSB->value();
	rc.forward_search_dvi = fromqstr(dviCB->currentText());
	rc.forward_search_pdf = fromqstr(pdfCB->currentText());

	switch (overwriteCO->currentIndex()) {
	case 0:
		rc.export_overwrite = NO_FILES;
		break;
	case 1:
		rc.export_overwrite = MAIN_FILE;
		break;
	case 2:
		rc.export_overwrite = ALL_FILES;
		break;
	}

	rc.print_paper_flag = fromqstr(printerPaperTypeED->text());
	rc.print_landscape_flag = fromqstr(printerLandscapeED->text());
	rc.print_paper_dimension_flag = fromqstr(printerPaperSizeED->text());
}


void PrefOutput::updateRC(LyXRC const & rc)
{
	DateED->setText(toqstr(rc.date_insert_format));
	plaintextLinelengthSB->setValue(rc.plaintext_linelen);
	dviCB->setEditText(toqstr(rc.forward_search_dvi));
	pdfCB->setEditText(toqstr(rc.forward_search_pdf));

	switch (rc.export_overwrite) {
	case NO_FILES:
		overwriteCO->setCurrentIndex(0);
		break;
	case MAIN_FILE:
		overwriteCO->setCurrentIndex(1);
		break;
	case ALL_FILES:
		overwriteCO->setCurrentIndex(2);
		break;
	}

	printerPaperTypeED->setText(toqstr(rc.print_paper_flag));
	printerLandscapeED->setText(toqstr(rc.print_landscape_flag));
	printerPaperSizeED->setText(toqstr(rc.print_paper_dimension_flag));
}


/////////////////////////////////////////////////////////////////////
//
// PrefInput
//
/////////////////////////////////////////////////////////////////////

PrefInput::PrefInput(GuiPreferences * form)
	: PrefModule(catEditing, N_("Keyboard/Mouse"), form)
{
	setupUi(this);

	connect(keymapCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(firstKeymapED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(secondKeymapED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(mouseWheelSpeedSB, SIGNAL(valueChanged(double)),
		this, SIGNAL(changed()));
	connect(scrollzoomEnableCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(scrollzoomValueCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(dontswapCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(mmPasteCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));

	// reveal checkbox for switching Ctrl and Meta on Mac:
	bool swapcb = false;
#ifdef Q_OS_MAC
#if QT_VERSION > 0x040600
	swapcb = true;
#endif
#endif
	dontswapCB->setVisible(swapcb);
}


void PrefInput::applyRC(LyXRC & rc) const
{
	// FIXME: can derive CB from the two EDs
	rc.use_kbmap = keymapCB->isChecked();
	rc.primary_kbmap = internal_path(fromqstr(firstKeymapED->text()));
	rc.secondary_kbmap = internal_path(fromqstr(secondKeymapED->text()));
	rc.mouse_wheel_speed = mouseWheelSpeedSB->value();
	if (scrollzoomEnableCB->isChecked()) {
		switch (scrollzoomValueCO->currentIndex()) {
		case 0:
			rc.scroll_wheel_zoom = LyXRC::SCROLL_WHEEL_ZOOM_CTRL;
			break;
		case 1:
			rc.scroll_wheel_zoom = LyXRC::SCROLL_WHEEL_ZOOM_SHIFT;
			break;
		case 2:
			rc.scroll_wheel_zoom = LyXRC::SCROLL_WHEEL_ZOOM_ALT;
			break;
		}
	} else {
		rc.scroll_wheel_zoom = LyXRC::SCROLL_WHEEL_ZOOM_OFF;
	}
	rc.mac_dontswap_ctrl_meta  = dontswapCB->isChecked();
	rc.mouse_middlebutton_paste = mmPasteCB->isChecked();
}


void PrefInput::updateRC(LyXRC const & rc)
{
	// FIXME: can derive CB from the two EDs
	keymapCB->setChecked(rc.use_kbmap);
	firstKeymapED->setText(toqstr(external_path(rc.primary_kbmap)));
	secondKeymapED->setText(toqstr(external_path(rc.secondary_kbmap)));
	mouseWheelSpeedSB->setValue(rc.mouse_wheel_speed);
	switch (rc.scroll_wheel_zoom) {
	case LyXRC::SCROLL_WHEEL_ZOOM_OFF:
		scrollzoomEnableCB->setChecked(false);
		break;
	case LyXRC::SCROLL_WHEEL_ZOOM_CTRL:
		scrollzoomEnableCB->setChecked(true);
		scrollzoomValueCO->setCurrentIndex(0);
		break;
	case LyXRC::SCROLL_WHEEL_ZOOM_SHIFT:
		scrollzoomEnableCB->setChecked(true);
		scrollzoomValueCO->setCurrentIndex(1);
		break;
	case LyXRC::SCROLL_WHEEL_ZOOM_ALT:
		scrollzoomEnableCB->setChecked(true);
		scrollzoomValueCO->setCurrentIndex(2);
		break;
	}
	dontswapCB->setChecked(rc.mac_dontswap_ctrl_meta);
	mmPasteCB->setChecked(rc.mouse_middlebutton_paste);
}


QString PrefInput::testKeymap(QString const & keymap)
{
	return form_->browsekbmap(internalPath(keymap));
}


void PrefInput::on_firstKeymapPB_clicked(bool)
{
	QString const file = testKeymap(firstKeymapED->text());
	if (!file.isEmpty())
		firstKeymapED->setText(file);
}


void PrefInput::on_secondKeymapPB_clicked(bool)
{
	QString const file = testKeymap(secondKeymapED->text());
	if (!file.isEmpty())
		secondKeymapED->setText(file);
}


void PrefInput::on_keymapCB_toggled(bool keymap)
{
	firstKeymapLA->setEnabled(keymap);
	secondKeymapLA->setEnabled(keymap);
	firstKeymapED->setEnabled(keymap);
	secondKeymapED->setEnabled(keymap);
	firstKeymapPB->setEnabled(keymap);
	secondKeymapPB->setEnabled(keymap);
}


void PrefInput::on_scrollzoomEnableCB_toggled(bool enabled)
{
	scrollzoomValueCO->setEnabled(enabled);
}


/////////////////////////////////////////////////////////////////////
//
// PrefCompletion
//
/////////////////////////////////////////////////////////////////////

PrefCompletion::PrefCompletion(GuiPreferences * form)
	: PrefModule(catEditing, N_("Input Completion"), form)
{
	setupUi(this);

	connect(inlineDelaySB, SIGNAL(valueChanged(double)),
		this, SIGNAL(changed()));
	connect(inlineMathCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(inlineTextCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(inlineDotsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(popupDelaySB, SIGNAL(valueChanged(double)),
		this, SIGNAL(changed()));
	connect(popupMathCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(autocorrectionCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(popupTextCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(popupAfterCompleteCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(cursorTextCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(minlengthSB, SIGNAL(valueChanged(int)),
			this, SIGNAL(changed()));
}


void PrefCompletion::on_inlineTextCB_clicked()
{
	enableCB();
}


void PrefCompletion::on_popupTextCB_clicked()
{
	enableCB();
}


void PrefCompletion::enableCB()
{
	cursorTextCB->setEnabled(
		popupTextCB->isChecked() || inlineTextCB->isChecked());
}


void PrefCompletion::applyRC(LyXRC & rc) const
{
	rc.completion_inline_delay = inlineDelaySB->value();
	rc.completion_inline_math = inlineMathCB->isChecked();
	rc.completion_inline_text = inlineTextCB->isChecked();
	rc.completion_inline_dots = inlineDotsCB->isChecked() ? 13 : -1;
	rc.completion_popup_delay = popupDelaySB->value();
	rc.completion_popup_math = popupMathCB->isChecked();
	rc.autocorrection_math = autocorrectionCB->isChecked();
	rc.completion_popup_text = popupTextCB->isChecked();
	rc.completion_cursor_text = cursorTextCB->isChecked();
	rc.completion_popup_after_complete =
		popupAfterCompleteCB->isChecked();
	rc.completion_minlength = minlengthSB->value();
}


void PrefCompletion::updateRC(LyXRC const & rc)
{
	inlineDelaySB->setValue(rc.completion_inline_delay);
	inlineMathCB->setChecked(rc.completion_inline_math);
	inlineTextCB->setChecked(rc.completion_inline_text);
	inlineDotsCB->setChecked(rc.completion_inline_dots != -1);
	popupDelaySB->setValue(rc.completion_popup_delay);
	popupMathCB->setChecked(rc.completion_popup_math);
	autocorrectionCB->setChecked(rc.autocorrection_math);
	popupTextCB->setChecked(rc.completion_popup_text);
	cursorTextCB->setChecked(rc.completion_cursor_text);
	popupAfterCompleteCB->setChecked(rc.completion_popup_after_complete);
	enableCB();
	minlengthSB->setValue(rc.completion_minlength);
}



/////////////////////////////////////////////////////////////////////
//
// PrefLatex
//
/////////////////////////////////////////////////////////////////////

PrefLatex::PrefLatex(GuiPreferences * form)
	: PrefModule(catOutput, N_("LaTeX"), form)
{
	setupUi(this);

	latexEncodingED->setValidator(new NoNewLineValidator(latexEncodingED));
	latexDviPaperED->setValidator(new NoNewLineValidator(latexDviPaperED));
	latexBibtexED->setValidator(new NoNewLineValidator(latexBibtexED));
	latexJBibtexED->setValidator(new NoNewLineValidator(latexJBibtexED));
	latexIndexED->setValidator(new NoNewLineValidator(latexIndexED));
	latexJIndexED->setValidator(new NoNewLineValidator(latexJIndexED));
	latexNomenclED->setValidator(new NoNewLineValidator(latexNomenclED));
	latexChecktexED->setValidator(new NoNewLineValidator(latexChecktexED));

	connect(latexEncodingCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(latexEncodingED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexChecktexED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexBibtexCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(latexBibtexED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexJBibtexED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexIndexCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(latexIndexED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexJIndexED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexAutoresetCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(latexDviPaperED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(latexNomenclED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

#if defined(__CYGWIN__) || defined(_WIN32)
	pathCB->setVisible(true);
	connect(pathCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
#else
	pathCB->setVisible(false);
#endif
}


void PrefLatex::on_latexEncodingCB_stateChanged(int state)
{
	latexEncodingED->setEnabled(state == Qt::Checked);
}


void PrefLatex::on_latexBibtexCO_activated(int n)
{
	QString const bibtex = latexBibtexCO->itemData(n).toString();
	if (bibtex.isEmpty()) {
		latexBibtexED->clear();
		latexBibtexOptionsLA->setText(qt_("Co&mmand:"));
		return;
	}
	for (LyXRC::CommandSet::const_iterator it = bibtex_alternatives.begin();
	     it != bibtex_alternatives.end(); ++it) {
		QString const bib = toqstr(*it);
		int ind = bib.indexOf(" ");
		QString sel_command = bib.left(ind);
		QString sel_options = ind < 0 ? QString() : bib.mid(ind + 1);
		if (bibtex == sel_command) {
			if (ind < 0)
				latexBibtexED->clear();
			else
				latexBibtexED->setText(sel_options.trimmed());
		}
	}
	latexBibtexOptionsLA->setText(qt_("&Options:"));
}


void PrefLatex::on_latexIndexCO_activated(int n)
{
	QString const index = latexIndexCO->itemData(n).toString();
	if (index.isEmpty()) {
		latexIndexED->clear();
		latexIndexOptionsLA->setText(qt_("Co&mmand:"));
		return;
	}
	for (LyXRC::CommandSet::const_iterator it = index_alternatives.begin();
	     it != index_alternatives.end(); ++it) {
		QString const idx = toqstr(*it);
		int ind = idx.indexOf(" ");
		QString sel_command = idx.left(ind);
		QString sel_options = ind < 0 ? QString() : idx.mid(ind + 1);
		if (index == sel_command) {
			if (ind < 0)
				latexIndexED->clear();
			else
				latexIndexED->setText(sel_options.trimmed());
		}
	}
	latexIndexOptionsLA->setText(qt_("Op&tions:"));
}


void PrefLatex::applyRC(LyXRC & rc) const
{
	// If bibtex is not empty, bibopt contains the options, otherwise
	// it is a customized bibtex command with options.
	QString const bibtex = latexBibtexCO->itemData(
		latexBibtexCO->currentIndex()).toString();
	QString const bibopt = latexBibtexED->text();
	if (bibtex.isEmpty())
		rc.bibtex_command = fromqstr(bibopt);
	else if (bibopt.isEmpty())
		rc.bibtex_command = fromqstr(bibtex);
	else
		rc.bibtex_command = fromqstr(bibtex) + " " + fromqstr(bibopt);

	// If index is not empty, idxopt contains the options, otherwise
	// it is a customized index command with options.
	QString const index = latexIndexCO->itemData(
		latexIndexCO->currentIndex()).toString();
	QString const idxopt = latexIndexED->text();
	if (index.isEmpty())
		rc.index_command = fromqstr(idxopt);
	else if (idxopt.isEmpty())
		rc.index_command = fromqstr(index);
	else
		rc.index_command = fromqstr(index) + " " + fromqstr(idxopt);

	if (latexEncodingCB->isChecked())
		rc.fontenc = fromqstr(latexEncodingED->text());
	else
		rc.fontenc = "default";
	rc.chktex_command = fromqstr(latexChecktexED->text());
	rc.jbibtex_command = fromqstr(latexJBibtexED->text());
	rc.jindex_command = fromqstr(latexJIndexED->text());
	rc.nomencl_command = fromqstr(latexNomenclED->text());
	rc.auto_reset_options = latexAutoresetCB->isChecked();
	rc.view_dvi_paper_option = fromqstr(latexDviPaperED->text());
#if defined(__CYGWIN__) || defined(_WIN32)
	rc.windows_style_tex_paths = pathCB->isChecked();
#endif
}


void PrefLatex::updateRC(LyXRC const & rc)
{
	latexBibtexCO->clear();

	latexBibtexCO->addItem(qt_("Custom"), QString());
	for (LyXRC::CommandSet::const_iterator it = rc.bibtex_alternatives.begin();
			     it != rc.bibtex_alternatives.end(); ++it) {
		QString const command = toqstr(*it).left(toqstr(*it).indexOf(" "));
		latexBibtexCO->addItem(command, command);
	}

	bibtex_alternatives = rc.bibtex_alternatives;

	QString const bib = toqstr(rc.bibtex_command);
	int ind = bib.indexOf(" ");
	QString sel_command = bib.left(ind);
	QString sel_options = ind < 0 ? QString() : bib.mid(ind + 1);

	int pos = latexBibtexCO->findData(sel_command);
	if (pos != -1) {
		latexBibtexCO->setCurrentIndex(pos);
		latexBibtexED->setText(sel_options.trimmed());
		latexBibtexOptionsLA->setText(qt_("&Options:"));
	} else {
		latexBibtexED->setText(toqstr(rc.bibtex_command));
		latexBibtexCO->setCurrentIndex(0);
		latexBibtexOptionsLA->setText(qt_("Co&mmand:"));
	}

	latexIndexCO->clear();

	latexIndexCO->addItem(qt_("Custom"), QString());
	for (LyXRC::CommandSet::const_iterator it = rc.index_alternatives.begin();
			     it != rc.index_alternatives.end(); ++it) {
		QString const command = toqstr(*it).left(toqstr(*it).indexOf(" "));
		latexIndexCO->addItem(command, command);
	}

	index_alternatives = rc.index_alternatives;

	QString const idx = toqstr(rc.index_command);
	ind = idx.indexOf(" ");
	sel_command = idx.left(ind);
	sel_options = ind < 0 ? QString() : idx.mid(ind + 1);

	pos = latexIndexCO->findData(sel_command);
	if (pos != -1) {
		latexIndexCO->setCurrentIndex(pos);
		latexIndexED->setText(sel_options.trimmed());
		latexIndexOptionsLA->setText(qt_("Op&tions:"));
	} else {
		latexIndexED->setText(toqstr(rc.index_command));
		latexIndexCO->setCurrentIndex(0);
		latexIndexOptionsLA->setText(qt_("Co&mmand:"));
	}

	if (rc.fontenc == "default") {
		latexEncodingCB->setChecked(false);
		latexEncodingED->setEnabled(false);
	} else {
		latexEncodingCB->setChecked(true);
		latexEncodingED->setEnabled(true);
		latexEncodingED->setText(toqstr(rc.fontenc));
	}
	latexChecktexED->setText(toqstr(rc.chktex_command));
	latexJBibtexED->setText(toqstr(rc.jbibtex_command));
	latexJIndexED->setText(toqstr(rc.jindex_command));
	latexNomenclED->setText(toqstr(rc.nomencl_command));
	latexAutoresetCB->setChecked(rc.auto_reset_options);
	latexDviPaperED->setText(toqstr(rc.view_dvi_paper_option));
#if defined(__CYGWIN__) || defined(_WIN32)
	pathCB->setChecked(rc.windows_style_tex_paths);
#endif
}


/////////////////////////////////////////////////////////////////////
//
// PrefScreenFonts
//
/////////////////////////////////////////////////////////////////////

PrefScreenFonts::PrefScreenFonts(GuiPreferences * form)
	: PrefModule(catLookAndFeel, N_("Screen Fonts"), form)
{
	setupUi(this);

	connect(screenRomanCO, SIGNAL(activated(QString)),
		this, SLOT(selectRoman(QString)));
	connect(screenSansCO, SIGNAL(activated(QString)),
		this, SLOT(selectSans(QString)));
	connect(screenTypewriterCO, SIGNAL(activated(QString)),
		this, SLOT(selectTypewriter(QString)));

	QFontDatabase fontdb;
	QStringList families(fontdb.families());
	for (QStringList::Iterator it = families.begin(); it != families.end(); ++it) {
		screenRomanCO->addItem(*it);
		screenSansCO->addItem(*it);
		screenTypewriterCO->addItem(*it);
	}
	connect(screenRomanCO, SIGNAL(activated(QString)),
		this, SIGNAL(changed()));
	connect(screenSansCO, SIGNAL(activated(QString)),
		this, SIGNAL(changed()));
	connect(screenTypewriterCO, SIGNAL(activated(QString)),
		this, SIGNAL(changed()));
	connect(screenZoomSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(screenTinyED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenSmallestED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenSmallerED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenSmallED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenNormalED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenLargeED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenLargerED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenLargestED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenHugeED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(screenHugerED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(pixmapCacheCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));

	screenTinyED->setValidator(new QDoubleValidator(screenTinyED));
	screenSmallestED->setValidator(new QDoubleValidator(screenSmallestED));
	screenSmallerED->setValidator(new QDoubleValidator(screenSmallerED));
	screenSmallED->setValidator(new QDoubleValidator(screenSmallED));
	screenNormalED->setValidator(new QDoubleValidator(screenNormalED));
	screenLargeED->setValidator(new QDoubleValidator(screenLargeED));
	screenLargerED->setValidator(new QDoubleValidator(screenLargerED));
	screenLargestED->setValidator(new QDoubleValidator(screenLargestED));
	screenHugeED->setValidator(new QDoubleValidator(screenHugeED));
	screenHugerED->setValidator(new QDoubleValidator(screenHugerED));
}


void PrefScreenFonts::applyRC(LyXRC & rc) const
{
	LyXRC const oldrc = rc;

	parseFontName(screenRomanCO->currentText(),
		rc.roman_font_name, rc.roman_font_foundry);
	parseFontName(screenSansCO->currentText(),
		rc.sans_font_name, rc.sans_font_foundry);
	parseFontName(screenTypewriterCO->currentText(),
		rc.typewriter_font_name, rc.typewriter_font_foundry);

	rc.zoom = screenZoomSB->value();
	rc.font_sizes[FONT_SIZE_TINY] = widgetToDoubleStr(screenTinyED);
	rc.font_sizes[FONT_SIZE_SCRIPT] = widgetToDoubleStr(screenSmallestED);
	rc.font_sizes[FONT_SIZE_FOOTNOTE] = widgetToDoubleStr(screenSmallerED);
	rc.font_sizes[FONT_SIZE_SMALL] = widgetToDoubleStr(screenSmallED);
	rc.font_sizes[FONT_SIZE_NORMAL] = widgetToDoubleStr(screenNormalED);
	rc.font_sizes[FONT_SIZE_LARGE] = widgetToDoubleStr(screenLargeED);
	rc.font_sizes[FONT_SIZE_LARGER] = widgetToDoubleStr(screenLargerED);
	rc.font_sizes[FONT_SIZE_LARGEST] = widgetToDoubleStr(screenLargestED);
	rc.font_sizes[FONT_SIZE_HUGE] = widgetToDoubleStr(screenHugeED);
	rc.font_sizes[FONT_SIZE_HUGER] = widgetToDoubleStr(screenHugerED);
	rc.use_pixmap_cache = pixmapCacheCB->isChecked();

	if (rc.font_sizes != oldrc.font_sizes
		|| rc.roman_font_name != oldrc.roman_font_name
		|| rc.sans_font_name != oldrc.sans_font_name
		|| rc.typewriter_font_name != oldrc.typewriter_font_name
		|| rc.zoom != oldrc.zoom) {
		// The global QPixmapCache is used in GuiPainter to cache text
		// painting so we must reset it in case any of the above
		// parameter is changed.
		QPixmapCache::clear();
		guiApp->fontLoader().update();
		form_->updateScreenFonts();
	}
}


void PrefScreenFonts::updateRC(LyXRC const & rc)
{
	setComboxFont(screenRomanCO, rc.roman_font_name,
			rc.roman_font_foundry);
	setComboxFont(screenSansCO, rc.sans_font_name,
			rc.sans_font_foundry);
	setComboxFont(screenTypewriterCO, rc.typewriter_font_name,
			rc.typewriter_font_foundry);

	selectRoman(screenRomanCO->currentText());
	selectSans(screenSansCO->currentText());
	selectTypewriter(screenTypewriterCO->currentText());

	screenZoomSB->setValue(rc.zoom);
	updateScreenFontSizes(rc);

	pixmapCacheCB->setChecked(rc.use_pixmap_cache);
#if defined(Q_WS_X11) || defined(QPA_XCB)
	pixmapCacheCB->setEnabled(false);
#endif

}


void PrefScreenFonts::updateScreenFontSizes(LyXRC const & rc)
{
	doubleToWidget(screenTinyED, rc.font_sizes[FONT_SIZE_TINY]);
	doubleToWidget(screenSmallestED, rc.font_sizes[FONT_SIZE_SCRIPT]);
	doubleToWidget(screenSmallerED, rc.font_sizes[FONT_SIZE_FOOTNOTE]);
	doubleToWidget(screenSmallED, rc.font_sizes[FONT_SIZE_SMALL]);
	doubleToWidget(screenNormalED, rc.font_sizes[FONT_SIZE_NORMAL]);
	doubleToWidget(screenLargeED, rc.font_sizes[FONT_SIZE_LARGE]);
	doubleToWidget(screenLargerED, rc.font_sizes[FONT_SIZE_LARGER]);
	doubleToWidget(screenLargestED, rc.font_sizes[FONT_SIZE_LARGEST]);
	doubleToWidget(screenHugeED, rc.font_sizes[FONT_SIZE_HUGE]);
	doubleToWidget(screenHugerED, rc.font_sizes[FONT_SIZE_HUGER]);
}


void PrefScreenFonts::selectRoman(const QString & name)
{
	screenRomanFE->set(QFont(name), name);
}


void PrefScreenFonts::selectSans(const QString & name)
{
	screenSansFE->set(QFont(name), name);
}


void PrefScreenFonts::selectTypewriter(const QString & name)
{
	screenTypewriterFE->set(QFont(name), name);
}


/////////////////////////////////////////////////////////////////////
//
// PrefColors
//
/////////////////////////////////////////////////////////////////////


PrefColors::PrefColors(GuiPreferences * form)
	: PrefModule(catLookAndFeel, N_("Colors"), form)
{
	setupUi(this);

	// FIXME: all of this initialization should be put into the controller.
	// See http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg113301.html
	// for some discussion of why that is not trivial.
	QPixmap icon(32, 32);
	for (int i = 0; i < Color_ignore; ++i) {
		ColorCode lc = static_cast<ColorCode>(i);
		if (lc == Color_none
		    || lc == Color_black
		    || lc == Color_white
		    || lc == Color_blue
		    || lc == Color_brown
		    || lc == Color_cyan
		    || lc == Color_darkgray
		    || lc == Color_gray
		    || lc == Color_green
		    || lc == Color_lightgray
		    || lc == Color_lime
		    || lc == Color_magenta
		    || lc == Color_olive
		    || lc == Color_orange
		    || lc == Color_pink
		    || lc == Color_purple
		    || lc == Color_red
		    || lc == Color_teal
		    || lc == Color_violet
		    || lc == Color_yellow
		    || lc == Color_inherit
		    || lc == Color_ignore)
			continue;
		lcolors_.push_back(lc);
	}
	qSort(lcolors_.begin(), lcolors_.end(), ColorSorter);
	vector<ColorCode>::const_iterator cit = lcolors_.begin();
	vector<ColorCode>::const_iterator const end = lcolors_.end();
	for (; cit != end; ++cit) {
		(void) new QListWidgetItem(QIcon(icon),
			toqstr(lcolor.getGUIName(*cit)), lyxObjectsLW);
	}
	curcolors_.resize(lcolors_.size());
	newcolors_.resize(lcolors_.size());
	// End initialization

	connect(colorChangePB, SIGNAL(clicked()),
		this, SLOT(changeColor()));
	connect(lyxObjectsLW, SIGNAL(itemSelectionChanged()),
		this, SLOT(changeLyxObjectsSelection()));
	connect(lyxObjectsLW, SIGNAL(itemActivated(QListWidgetItem*)),
		this, SLOT(changeColor()));
	connect(syscolorsCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(syscolorsCB, SIGNAL(toggled(bool)),
		this, SLOT(changeSysColor()));
}


void PrefColors::applyRC(LyXRC & rc) const
{
	LyXRC oldrc = rc;

	for (unsigned int i = 0; i < lcolors_.size(); ++i)
		if (curcolors_[i] != newcolors_[i])
			form_->setColor(lcolors_[i], newcolors_[i]);
	rc.use_system_colors = syscolorsCB->isChecked();

	if (oldrc.use_system_colors != rc.use_system_colors)
		guiApp->colorCache().clear();
}


void PrefColors::updateRC(LyXRC const & rc)
{
	for (unsigned int i = 0; i < lcolors_.size(); ++i) {
		QColor color = QColor(guiApp->colorCache().get(lcolors_[i], false));
		QPixmap coloritem(32, 32);
		coloritem.fill(color);
		lyxObjectsLW->item(i)->setIcon(QIcon(coloritem));
		newcolors_[i] = curcolors_[i] = color.name();
	}
	syscolorsCB->setChecked(rc.use_system_colors);
	changeLyxObjectsSelection();
}


void PrefColors::changeColor()
{
	int const row = lyxObjectsLW->currentRow();

	// just to be sure
	if (row < 0)
		return;

	QString const color = newcolors_[row];
	QColor c = QColorDialog::getColor(QColor(color), qApp->focusWidget());

	if (c.isValid() && c.name() != color) {
		newcolors_[row] = c.name();
		QPixmap coloritem(32, 32);
		coloritem.fill(c);
		lyxObjectsLW->currentItem()->setIcon(QIcon(coloritem));
		// emit signal
		changed();
	}
}

void PrefColors::changeSysColor()
{
	for (int row = 0 ; row < lyxObjectsLW->count() ; ++row) {
		// skip colors that are taken from system palette
		bool const hide = syscolorsCB->isChecked()
			&& guiApp->colorCache().isSystem(lcolors_[row]);

		lyxObjectsLW->item(row)->setHidden(hide);
	}

}

void PrefColors::changeLyxObjectsSelection()
{
	colorChangePB->setDisabled(lyxObjectsLW->currentRow() < 0);
}


/////////////////////////////////////////////////////////////////////
//
// PrefDisplay
//
/////////////////////////////////////////////////////////////////////

PrefDisplay::PrefDisplay(GuiPreferences * form)
	: PrefModule(catLookAndFeel, N_("Display"), form)
{
	setupUi(this);
	connect(displayGraphicsCB, SIGNAL(toggled(bool)), this, SIGNAL(changed()));
	connect(instantPreviewCO, SIGNAL(activated(int)), this, SIGNAL(changed()));
	connect(previewSizeSB, SIGNAL(valueChanged(double)), this, SIGNAL(changed()));
	connect(paragraphMarkerCB, SIGNAL(toggled(bool)), this, SIGNAL(changed()));
}


void PrefDisplay::on_instantPreviewCO_currentIndexChanged(int index)
{
	previewSizeSB->setEnabled(index != 0);
}


void PrefDisplay::applyRC(LyXRC & rc) const
{
	switch (instantPreviewCO->currentIndex()) {
		case 0:
			rc.preview = LyXRC::PREVIEW_OFF;
			break;
		case 1:
			if (rc.preview != LyXRC::PREVIEW_NO_MATH) {
				rc.preview = LyXRC::PREVIEW_NO_MATH;
				form_->updatePreviews();
			}
			break;
		case 2:
			if (rc.preview != LyXRC::PREVIEW_ON) {
				rc.preview = LyXRC::PREVIEW_ON;
				form_->updatePreviews();
			}
			break;
	}

	rc.display_graphics = displayGraphicsCB->isChecked();
	rc.preview_scale_factor = previewSizeSB->value();
	rc.paragraph_markers = paragraphMarkerCB->isChecked();

	// FIXME!! The graphics cache no longer has a changeDisplay method.
#if 0
	if (old_value != rc.display_graphics) {
		graphics::GCache & gc = graphics::GCache::get();
		gc.changeDisplay();
	}
#endif
}


void PrefDisplay::updateRC(LyXRC const & rc)
{
	switch (rc.preview) {
	case LyXRC::PREVIEW_OFF:
		instantPreviewCO->setCurrentIndex(0);
		break;
	case LyXRC::PREVIEW_NO_MATH :
		instantPreviewCO->setCurrentIndex(1);
		break;
	case LyXRC::PREVIEW_ON :
		instantPreviewCO->setCurrentIndex(2);
		break;
	}

	displayGraphicsCB->setChecked(rc.display_graphics);
	previewSizeSB->setValue(rc.preview_scale_factor);
	paragraphMarkerCB->setChecked(rc.paragraph_markers);
	previewSizeSB->setEnabled(
		rc.display_graphics
		&& rc.preview != LyXRC::PREVIEW_OFF);
}


/////////////////////////////////////////////////////////////////////
//
// PrefPaths
//
/////////////////////////////////////////////////////////////////////

PrefPaths::PrefPaths(GuiPreferences * form)
	: PrefModule(QString(), N_("Paths"), form)
{
	setupUi(this);

	connect(workingDirPB, SIGNAL(clicked()), this, SLOT(selectWorkingdir()));
	connect(workingDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(templateDirPB, SIGNAL(clicked()), this, SLOT(selectTemplatedir()));
	connect(templateDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(exampleDirPB, SIGNAL(clicked()), this, SLOT(selectExampledir()));
	connect(exampleDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(backupDirPB, SIGNAL(clicked()), this, SLOT(selectBackupdir()));
	connect(backupDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(lyxserverDirPB, SIGNAL(clicked()), this, SLOT(selectLyxPipe()));
	connect(lyxserverDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(thesaurusDirPB, SIGNAL(clicked()), this, SLOT(selectThesaurusdir()));
	connect(thesaurusDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(tempDirPB, SIGNAL(clicked()), this, SLOT(selectTempdir()));
	connect(tempDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

#if defined(USE_HUNSPELL)
	connect(hunspellDirPB, SIGNAL(clicked()), this, SLOT(selectHunspelldir()));
	connect(hunspellDirED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
#else
	hunspellDirPB->setEnabled(false);
	hunspellDirED->setEnabled(false);
#endif

	connect(pathPrefixED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	connect(texinputsPrefixED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	pathPrefixED->setValidator(new NoNewLineValidator(pathPrefixED));
	texinputsPrefixED->setValidator(new NoNewLineValidator(texinputsPrefixED));
}


void PrefPaths::applyRC(LyXRC & rc) const
{
	rc.document_path = internal_path(fromqstr(workingDirED->text()));
	rc.example_path = internal_path(fromqstr(exampleDirED->text()));
	rc.template_path = internal_path(fromqstr(templateDirED->text()));
	rc.backupdir_path = internal_path(fromqstr(backupDirED->text()));
	rc.tempdir_path = internal_path(fromqstr(tempDirED->text()));
	rc.thesaurusdir_path = internal_path(fromqstr(thesaurusDirED->text()));
	rc.hunspelldir_path = internal_path(fromqstr(hunspellDirED->text()));
	rc.path_prefix = internal_path_list(fromqstr(pathPrefixED->text()));
	rc.texinputs_prefix = internal_path_list(fromqstr(texinputsPrefixED->text()));
	// FIXME: should be a checkbox only
	rc.lyxpipes = internal_path(fromqstr(lyxserverDirED->text()));
}


void PrefPaths::updateRC(LyXRC const & rc)
{
	workingDirED->setText(toqstr(external_path(rc.document_path)));
	exampleDirED->setText(toqstr(external_path(rc.example_path)));
	templateDirED->setText(toqstr(external_path(rc.template_path)));
	backupDirED->setText(toqstr(external_path(rc.backupdir_path)));
	tempDirED->setText(toqstr(external_path(rc.tempdir_path)));
	thesaurusDirED->setText(toqstr(external_path(rc.thesaurusdir_path)));
	hunspellDirED->setText(toqstr(external_path(rc.hunspelldir_path)));
	pathPrefixED->setText(toqstr(external_path_list(rc.path_prefix)));
	texinputsPrefixED->setText(toqstr(external_path_list(rc.texinputs_prefix)));
	// FIXME: should be a checkbox only
	lyxserverDirED->setText(toqstr(external_path(rc.lyxpipes)));
}


void PrefPaths::selectExampledir()
{
	QString file = browseDir(internalPath(exampleDirED->text()),
		qt_("Select directory for example files"));
	if (!file.isEmpty())
		exampleDirED->setText(file);
}


void PrefPaths::selectTemplatedir()
{
	QString file = browseDir(internalPath(templateDirED->text()),
		qt_("Select a document templates directory"));
	if (!file.isEmpty())
		templateDirED->setText(file);
}


void PrefPaths::selectTempdir()
{
	QString file = browseDir(internalPath(tempDirED->text()),
		qt_("Select a temporary directory"));
	if (!file.isEmpty())
		tempDirED->setText(file);
}


void PrefPaths::selectBackupdir()
{
	QString file = browseDir(internalPath(backupDirED->text()),
		qt_("Select a backups directory"));
	if (!file.isEmpty())
		backupDirED->setText(file);
}


void PrefPaths::selectWorkingdir()
{
	QString file = browseDir(internalPath(workingDirED->text()),
		qt_("Select a document directory"));
	if (!file.isEmpty())
		workingDirED->setText(file);
}


void PrefPaths::selectThesaurusdir()
{
	QString file = browseDir(internalPath(thesaurusDirED->text()),
		qt_("Set the path to the thesaurus dictionaries"));
	if (!file.isEmpty())
		thesaurusDirED->setText(file);
}


void PrefPaths::selectHunspelldir()
{
	QString file = browseDir(internalPath(hunspellDirED->text()),
		qt_("Set the path to the Hunspell dictionaries"));
	if (!file.isEmpty())
		hunspellDirED->setText(file);
}


void PrefPaths::selectLyxPipe()
{
	QString file = form_->browse(internalPath(lyxserverDirED->text()),
		qt_("Give a filename for the LyX server pipe"));
	if (!file.isEmpty())
		lyxserverDirED->setText(file);
}


/////////////////////////////////////////////////////////////////////
//
// PrefSpellchecker
//
/////////////////////////////////////////////////////////////////////

PrefSpellchecker::PrefSpellchecker(GuiPreferences * form)
	: PrefModule(catLanguage, N_("Spellchecker"), form)
{
	setupUi(this);

// FIXME: this check should test the target platform (darwin)
#if defined(USE_MACOSX_PACKAGING)
	spellcheckerCB->addItem(qt_("Native"), QString("native"));
#define CONNECT_APPLESPELL
#else
#undef CONNECT_APPLESPELL
#endif
#if defined(USE_ASPELL)
	spellcheckerCB->addItem(qt_("Aspell"), QString("aspell"));
#endif
#if defined(USE_ENCHANT)
	spellcheckerCB->addItem(qt_("Enchant"), QString("enchant"));
#endif
#if defined(USE_HUNSPELL)
	spellcheckerCB->addItem(qt_("Hunspell"), QString("hunspell"));
#endif

	#if defined(CONNECT_APPLESPELL) || defined(USE_ASPELL) || defined(USE_ENCHANT) || defined(USE_HUNSPELL)
		connect(spellcheckerCB, SIGNAL(currentIndexChanged(int)),
			this, SIGNAL(changed()));
		connect(altLanguageED, SIGNAL(textChanged(QString)),
			this, SIGNAL(changed()));
		connect(escapeCharactersED, SIGNAL(textChanged(QString)),
			this, SIGNAL(changed()));
		connect(compoundWordCB, SIGNAL(clicked()),
			this, SIGNAL(changed()));
		connect(spellcheckContinuouslyCB, SIGNAL(clicked()),
			this, SIGNAL(changed()));
		connect(spellcheckNotesCB, SIGNAL(clicked()),
			this, SIGNAL(changed()));

		altLanguageED->setValidator(new NoNewLineValidator(altLanguageED));
		escapeCharactersED->setValidator(new NoNewLineValidator(escapeCharactersED));
	#else
		spellcheckerCB->setEnabled(false);
		altLanguageED->setEnabled(false);
		escapeCharactersED->setEnabled(false);
		compoundWordCB->setEnabled(false);
		spellcheckContinuouslyCB->setEnabled(false);
		spellcheckNotesCB->setEnabled(false);
	#endif
}


void PrefSpellchecker::applyRC(LyXRC & rc) const
{
	string const speller = fromqstr(spellcheckerCB->
		itemData(spellcheckerCB->currentIndex()).toString());
	if (!speller.empty())
		rc.spellchecker = speller;
	rc.spellchecker_alt_lang = fromqstr(altLanguageED->text());
	rc.spellchecker_esc_chars = fromqstr(escapeCharactersED->text());
	rc.spellchecker_accept_compound = compoundWordCB->isChecked();
	rc.spellcheck_continuously = spellcheckContinuouslyCB->isChecked();
	rc.spellcheck_notes = spellcheckNotesCB->isChecked();
}


void PrefSpellchecker::updateRC(LyXRC const & rc)
{
	spellcheckerCB->setCurrentIndex(
		spellcheckerCB->findData(toqstr(rc.spellchecker)));
	altLanguageED->setText(toqstr(rc.spellchecker_alt_lang));
	escapeCharactersED->setText(toqstr(rc.spellchecker_esc_chars));
	compoundWordCB->setChecked(rc.spellchecker_accept_compound);
	spellcheckContinuouslyCB->setChecked(rc.spellcheck_continuously);
	spellcheckNotesCB->setChecked(rc.spellcheck_notes);
}


void PrefSpellchecker::on_spellcheckerCB_currentIndexChanged(int index)
{
	QString spellchecker = spellcheckerCB->itemData(index).toString();

	compoundWordCB->setEnabled(spellchecker == QString("aspell"));
}



/////////////////////////////////////////////////////////////////////
//
// PrefConverters
//
/////////////////////////////////////////////////////////////////////


PrefConverters::PrefConverters(GuiPreferences * form)
	: PrefModule(catFiles, N_("Converters"), form)
{
	setupUi(this);

	connect(converterNewPB, SIGNAL(clicked()),
		this, SLOT(updateConverter()));
	connect(converterRemovePB, SIGNAL(clicked()),
		this, SLOT(removeConverter()));
	connect(converterModifyPB, SIGNAL(clicked()),
		this, SLOT(updateConverter()));
	connect(convertersLW, SIGNAL(currentRowChanged(int)),
		this, SLOT(switchConverter()));
	connect(converterFromCO, SIGNAL(activated(QString)),
		this, SLOT(changeConverter()));
	connect(converterToCO, SIGNAL(activated(QString)),
		this, SLOT(changeConverter()));
	connect(converterED, SIGNAL(textEdited(QString)),
		this, SLOT(changeConverter()));
	connect(converterFlagED, SIGNAL(textEdited(QString)),
		this, SLOT(changeConverter()));
	connect(converterNewPB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(converterRemovePB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(converterModifyPB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(maxAgeLE, SIGNAL(textEdited(QString)),
		this, SIGNAL(changed()));

	converterED->setValidator(new NoNewLineValidator(converterED));
	converterFlagED->setValidator(new NoNewLineValidator(converterFlagED));
	maxAgeLE->setValidator(new QDoubleValidator(maxAgeLE));
	//converterDefGB->setFocusProxy(convertersLW);
}


void PrefConverters::applyRC(LyXRC & rc) const
{
	rc.use_converter_cache = cacheCB->isChecked();
	rc.converter_cache_maxage = int(widgetToDouble(maxAgeLE) * 86400.0);
}


void PrefConverters::updateRC(LyXRC const & rc)
{
	cacheCB->setChecked(rc.use_converter_cache);
	QString max_age;
	doubleToWidget(maxAgeLE, (double(rc.converter_cache_maxage) / 86400.0), 'g', 6);
	updateGui();
}


void PrefConverters::updateGui()
{
	QString const pattern("%1 -> %2");
	form_->formats().sort();
	form_->converters().update(form_->formats());
	// save current selection
	QString current =
		pattern
		.arg(converterFromCO->currentText())
		.arg(converterToCO->currentText());

	converterFromCO->clear();
	converterToCO->clear();

	for (Format const & f : form_->formats()) {
		QString const name = toqstr(translateIfPossible(f.prettyname()));
		converterFromCO->addItem(name);
		converterToCO->addItem(name);
	}

	// currentRowChanged(int) is also triggered when updating the listwidget
	// block signals to avoid unnecessary calls to switchConverter()
	convertersLW->blockSignals(true);
	convertersLW->clear();

	for (Converter const & c : form_->converters()) {
		QString const name =
			pattern
			.arg(toqstr(translateIfPossible(c.From()->prettyname())))
			.arg(toqstr(translateIfPossible(c.To()->prettyname())));
		int type = form_->converters().getNumber(c.From()->name(),
		                                         c.To()->name());
		new QListWidgetItem(name, convertersLW, type);
	}
	convertersLW->sortItems(Qt::AscendingOrder);
	convertersLW->blockSignals(false);

	// restore selection
	if (current != pattern.arg(QString()).arg(QString())) {
		QList<QListWidgetItem *> const item =
			convertersLW->findItems(current, Qt::MatchExactly);
		if (!item.isEmpty())
			convertersLW->setCurrentItem(item.at(0));
	}

	// select first element if restoring failed
	if (convertersLW->currentRow() == -1)
		convertersLW->setCurrentRow(0);

	updateButtons();
}


void PrefConverters::switchConverter()
{
	int const cnr = convertersLW->currentItem()->type();
	Converter const & c(form_->converters().get(cnr));
	converterFromCO->setCurrentIndex(form_->formats().getNumber(c.from()));
	converterToCO->setCurrentIndex(form_->formats().getNumber(c.to()));
	converterED->setText(toqstr(c.command()));
	converterFlagED->setText(toqstr(c.flags()));

	updateButtons();
}


void PrefConverters::changeConverter()
{
	updateButtons();
}


void PrefConverters::updateButtons()
{
	if (form_->formats().empty())
		return;
	Format const & from = form_->formats().get(converterFromCO->currentIndex());
	Format const & to = form_->formats().get(converterToCO->currentIndex());
	int const sel = form_->converters().getNumber(from.name(), to.name());
	bool const known = sel >= 0;
	bool const valid = !(converterED->text().isEmpty()
		|| from.name() == to.name());

	string old_command;
	string old_flag;

	if (convertersLW->count() > 0) {
		int const cnr = convertersLW->currentItem()->type();
		Converter const & c = form_->converters().get(cnr);
		old_command = c.command();
		old_flag = c.flags();
	}

	string const new_command = fromqstr(converterED->text());
	string const new_flag = fromqstr(converterFlagED->text());

	bool modified = (old_command != new_command || old_flag != new_flag);

	converterModifyPB->setEnabled(valid && known && modified);
	converterNewPB->setEnabled(valid && !known);
	converterRemovePB->setEnabled(known);

	maxAgeLE->setEnabled(cacheCB->isChecked());
	maxAgeLA->setEnabled(cacheCB->isChecked());
}


// FIXME: user must
// specify unique from/to or it doesn't appear. This is really bad UI
// this is why we can use the same function for both new and modify
void PrefConverters::updateConverter()
{
	Format const & from = form_->formats().get(converterFromCO->currentIndex());
	Format const & to = form_->formats().get(converterToCO->currentIndex());
	string const flags = fromqstr(converterFlagED->text());
	string const command = fromqstr(converterED->text());

	Converter const * old =
		form_->converters().getConverter(from.name(), to.name());
	form_->converters().add(from.name(), to.name(), command, flags);

	if (!old)
		form_->converters().updateLast(form_->formats());

	updateGui();

	// Remove all files created by this converter from the cache, since
	// the modified converter might create different files.
	ConverterCache::get().remove_all(from.name(), to.name());
}


void PrefConverters::removeConverter()
{
	Format const & from = form_->formats().get(converterFromCO->currentIndex());
	Format const & to = form_->formats().get(converterToCO->currentIndex());
	form_->converters().erase(from.name(), to.name());

	updateGui();

	// Remove all files created by this converter from the cache, since
	// a possible new converter might create different files.
	ConverterCache::get().remove_all(from.name(), to.name());
}


void PrefConverters::on_cacheCB_stateChanged(int state)
{
	maxAgeLE->setEnabled(state == Qt::Checked);
	maxAgeLA->setEnabled(state == Qt::Checked);
	changed();
}


/////////////////////////////////////////////////////////////////////
//
// FormatValidator
//
/////////////////////////////////////////////////////////////////////

class FormatValidator : public QValidator
{
public:
	FormatValidator(QWidget *, Formats const & f);
	void fixup(QString & input) const;
	QValidator::State validate(QString & input, int & pos) const;
private:
	virtual QString toString(Format const & format) const = 0;
	int nr() const;
	Formats const & formats_;
};


FormatValidator::FormatValidator(QWidget * parent, Formats const & f)
	: QValidator(parent), formats_(f)
{
}


void FormatValidator::fixup(QString & input) const
{
	Formats::const_iterator cit = formats_.begin();
	Formats::const_iterator end = formats_.end();
	for (; cit != end; ++cit) {
		QString const name = toString(*cit);
		if (distance(formats_.begin(), cit) == nr()) {
			input = name;
			return;
		}
	}
}


QValidator::State FormatValidator::validate(QString & input, int & /*pos*/) const
{
	Formats::const_iterator cit = formats_.begin();
	Formats::const_iterator end = formats_.end();
	bool unknown = true;
	for (; unknown && cit != end; ++cit) {
		QString const name = toString(*cit);
		if (distance(formats_.begin(), cit) != nr())
			unknown = name != input;
	}

	if (unknown && !input.isEmpty())
		return QValidator::Acceptable;
	else
		return QValidator::Intermediate;
}


int FormatValidator::nr() const
{
	QComboBox * p = qobject_cast<QComboBox *>(parent());
	return p->itemData(p->currentIndex()).toInt();
}


/////////////////////////////////////////////////////////////////////
//
// FormatNameValidator
//
/////////////////////////////////////////////////////////////////////

class FormatNameValidator : public FormatValidator
{
public:
	FormatNameValidator(QWidget * parent, Formats const & f)
		: FormatValidator(parent, f)
	{}
private:
	QString toString(Format const & format) const
	{
		return toqstr(format.name());
	}
};


/////////////////////////////////////////////////////////////////////
//
// FormatPrettynameValidator
//
/////////////////////////////////////////////////////////////////////

class FormatPrettynameValidator : public FormatValidator
{
public:
	FormatPrettynameValidator(QWidget * parent, Formats const & f)
		: FormatValidator(parent, f)
	{}
private:
	QString toString(Format const & format) const
	{
		return toqstr(translateIfPossible(format.prettyname()));
	}
};


/////////////////////////////////////////////////////////////////////
//
// PrefFileformats
//
/////////////////////////////////////////////////////////////////////

PrefFileformats::PrefFileformats(GuiPreferences * form)
	: PrefModule(catFiles, N_("File Formats"), form)
{
	setupUi(this);

	formatED->setValidator(new FormatNameValidator(formatsCB, form_->formats()));
	formatsCB->setValidator(new FormatPrettynameValidator(formatsCB, form_->formats()));
	extensionsED->setValidator(new NoNewLineValidator(extensionsED));
	shortcutED->setValidator(new NoNewLineValidator(shortcutED));
	editorED->setValidator(new NoNewLineValidator(editorED));
	viewerED->setValidator(new NoNewLineValidator(viewerED));
	copierED->setValidator(new NoNewLineValidator(copierED));

	connect(documentCB, SIGNAL(clicked()),
		this, SLOT(setFlags()));
	connect(vectorCB, SIGNAL(clicked()),
		this, SLOT(setFlags()));
	connect(exportMenuCB, SIGNAL(clicked()),
		this, SLOT(setFlags()));
	connect(formatsCB->lineEdit(), SIGNAL(editingFinished()),
		this, SLOT(updatePrettyname()));
	connect(formatsCB->lineEdit(), SIGNAL(textEdited(QString)),
		this, SIGNAL(changed()));
	connect(defaultFormatCB, SIGNAL(activated(QString)),
		this, SIGNAL(changed()));
	connect(defaultOTFFormatCB, SIGNAL(activated(QString)),
		this, SIGNAL(changed()));
	connect(viewerCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(editorCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
}


namespace {

string const l10n_shortcut(docstring const & prettyname, string const & shortcut)
{
	if (shortcut.empty())
		return string();

	string l10n_format =
		to_utf8(_(to_utf8(prettyname) + '|' + shortcut));
	return split(l10n_format, '|');
}

} // namespace anon


void PrefFileformats::applyRC(LyXRC & rc) const
{
	QString const default_format = defaultFormatCB->itemData(
		defaultFormatCB->currentIndex()).toString();
	rc.default_view_format = fromqstr(default_format);
	QString const default_otf_format = defaultOTFFormatCB->itemData(
		defaultOTFFormatCB->currentIndex()).toString();
	rc.default_otf_view_format = fromqstr(default_otf_format);
}


void PrefFileformats::updateRC(LyXRC const & rc)
{
	viewer_alternatives = rc.viewer_alternatives;
	editor_alternatives = rc.editor_alternatives;
	bool const init = defaultFormatCB->currentText().isEmpty();
	updateView();
	if (init) {
		int pos =
			defaultFormatCB->findData(toqstr(rc.default_view_format));
		defaultFormatCB->setCurrentIndex(pos);
		pos = defaultOTFFormatCB->findData(toqstr(rc.default_otf_view_format));
				defaultOTFFormatCB->setCurrentIndex(pos);
		defaultOTFFormatCB->setCurrentIndex(pos);
	}
}


void PrefFileformats::updateView()
{
	QString const current = formatsCB->currentText();
	QString const current_def = defaultFormatCB->currentText();
	QString const current_def_otf = defaultOTFFormatCB->currentText();

	// update comboboxes with formats
	formatsCB->blockSignals(true);
	defaultFormatCB->blockSignals(true);
	defaultOTFFormatCB->blockSignals(true);
	formatsCB->clear();
	defaultFormatCB->clear();
	defaultOTFFormatCB->clear();
	form_->formats().sort();
	for (Format const & f : formats) {
		QString const prettyname = toqstr(translateIfPossible(f.prettyname()));
		formatsCB->addItem(prettyname,
		                   QVariant(form_->formats().getNumber(f.name())));
		if (f.viewer().empty())
			continue;
		if (form_->converters().isReachable("xhtml", f.name())
		    || form_->converters().isReachable("dviluatex", f.name())
		    || form_->converters().isReachable("luatex", f.name())
		    || form_->converters().isReachable("xetex", f.name())) {
			defaultFormatCB->addItem(prettyname,
					QVariant(toqstr(f.name())));
			defaultOTFFormatCB->addItem(prettyname,
					QVariant(toqstr(f.name())));
		} else if (form_->converters().isReachable("latex", f.name())
			   || form_->converters().isReachable("pdflatex", f.name()))
			defaultFormatCB->addItem(prettyname,
					QVariant(toqstr(f.name())));
	}

	// restore selections
	int item = formatsCB->findText(current, Qt::MatchExactly);
	formatsCB->setCurrentIndex(item < 0 ? 0 : item);
	on_formatsCB_currentIndexChanged(item < 0 ? 0 : item);
	item = defaultFormatCB->findText(current_def, Qt::MatchExactly);
	defaultFormatCB->setCurrentIndex(item < 0 ? 0 : item);
	item = defaultOTFFormatCB->findText(current_def_otf, Qt::MatchExactly);
	defaultOTFFormatCB->setCurrentIndex(item < 0 ? 0 : item);
	formatsCB->blockSignals(false);
	defaultFormatCB->blockSignals(false);
	defaultOTFFormatCB->blockSignals(false);
}


void PrefFileformats::on_formatsCB_currentIndexChanged(int i)
{
	if (form_->formats().empty())
		return;
	int const nr = formatsCB->itemData(i).toInt();
	Format const f = form_->formats().get(nr);

	formatED->setText(toqstr(f.name()));
	copierED->setText(toqstr(form_->movers().command(f.name())));
	extensionsED->setText(toqstr(f.extensions()));
	mimeED->setText(toqstr(f.mime()));
	shortcutED->setText(
		toqstr(l10n_shortcut(f.prettyname(), f.shortcut())));
	documentCB->setChecked((f.documentFormat()));
	vectorCB->setChecked((f.vectorFormat()));
	exportMenuCB->setChecked((f.inExportMenu()));
	exportMenuCB->setEnabled((f.documentFormat()));
	updateViewers();
	updateEditors();
}


void PrefFileformats::setFlags()
{
	int flags = Format::none;
	if (documentCB->isChecked())
		flags |= Format::document;
	if (vectorCB->isChecked())
		flags |= Format::vector;
	if (exportMenuCB->isChecked())
		flags |= Format::export_menu;
	currentFormat().setFlags(flags);
	exportMenuCB->setEnabled(documentCB->isChecked());
	changed();
}


void PrefFileformats::on_copierED_textEdited(const QString & s)
{
	string const fmt = fromqstr(formatED->text());
	form_->movers().set(fmt, fromqstr(s));
	changed();
}


void PrefFileformats::on_extensionsED_textEdited(const QString & s)
{
	currentFormat().setExtensions(fromqstr(s));
	changed();
}


void PrefFileformats::on_viewerED_textEdited(const QString & s)
{
	currentFormat().setViewer(fromqstr(s));
	changed();
}


void PrefFileformats::on_editorED_textEdited(const QString & s)
{
	currentFormat().setEditor(fromqstr(s));
	changed();
}


void PrefFileformats::on_mimeED_textEdited(const QString & s)
{
	currentFormat().setMime(fromqstr(s));
	changed();
}


void PrefFileformats::on_shortcutED_textEdited(const QString & s)
{
	string const new_shortcut = fromqstr(s);
	if (new_shortcut == l10n_shortcut(currentFormat().prettyname(),
					  currentFormat().shortcut()))
		return;
	currentFormat().setShortcut(new_shortcut);
	changed();
}


void PrefFileformats::on_formatED_editingFinished()
{
	string const newname = fromqstr(formatED->displayText());
	string const oldname = currentFormat().name();
	if (newname == oldname)
		return;
	if (form_->converters().formatIsUsed(oldname)) {
		Alert::error(_("Format in use"),
			     _("You cannot change a format's short name "
			       "if the format is used by a converter. "
			       "Please remove the converter first."));
		updateView();
		return;
	}

	currentFormat().setName(newname);
	changed();
}


void PrefFileformats::on_formatED_textChanged(const QString &)
{
	QString t = formatED->text();
	int p = 0;
	bool valid = formatED->validator()->validate(t, p) == QValidator::Acceptable;
	setValid(formatLA, valid);
}


void PrefFileformats::on_formatsCB_editTextChanged(const QString &)
{
	QString t = formatsCB->currentText();
	int p = 0;
	bool valid = formatsCB->validator()->validate(t, p) == QValidator::Acceptable;
	setValid(formatsLA, valid);
}


void PrefFileformats::updatePrettyname()
{
	QString const newname = formatsCB->currentText();
	if (newname == toqstr(translateIfPossible(currentFormat().prettyname())))
		return;

	currentFormat().setPrettyname(qstring_to_ucs4(newname));
	formatsChanged();
	updateView();
	changed();
}


namespace {
	void updateComboBox(LyXRC::Alternatives const & alts,
	                    string const & fmt, QComboBox * combo)
	{
		LyXRC::Alternatives::const_iterator it =
				alts.find(fmt);
		if (it != alts.end()) {
			LyXRC::CommandSet const & cmds = it->second;
			LyXRC::CommandSet::const_iterator sit =
					cmds.begin();
			LyXRC::CommandSet::const_iterator const sen =
					cmds.end();
			for (; sit != sen; ++sit) {
				QString const qcmd = toqstr(*sit);
				combo->addItem(qcmd, qcmd);
			}
		}
	}
}


void PrefFileformats::updateViewers()
{
	Format const f = currentFormat();
	viewerCO->blockSignals(true);
	viewerCO->clear();
	viewerCO->addItem(qt_("None"), QString());
	updateComboBox(viewer_alternatives, f.name(), viewerCO);
	viewerCO->addItem(qt_("Custom"), QString("custom viewer"));
	viewerCO->blockSignals(false);

	int pos = viewerCO->findData(toqstr(f.viewer()));
	if (pos != -1) {
		viewerED->clear();
		viewerED->setEnabled(false);
		viewerCO->setCurrentIndex(pos);
	} else {
		viewerED->setEnabled(true);
		viewerED->setText(toqstr(f.viewer()));
		viewerCO->setCurrentIndex(viewerCO->findData(toqstr("custom viewer")));
	}
}


void PrefFileformats::updateEditors()
{
	Format const f = currentFormat();
	editorCO->blockSignals(true);
	editorCO->clear();
	editorCO->addItem(qt_("None"), QString());
	updateComboBox(editor_alternatives, f.name(), editorCO);
	editorCO->addItem(qt_("Custom"), QString("custom editor"));
	editorCO->blockSignals(false);

	int pos = editorCO->findData(toqstr(f.editor()));
	if (pos != -1) {
		editorED->clear();
		editorED->setEnabled(false);
		editorCO->setCurrentIndex(pos);
	} else {
		editorED->setEnabled(true);
		editorED->setText(toqstr(f.editor()));
		editorCO->setCurrentIndex(editorCO->findData(toqstr("custom editor")));
	}
}


void PrefFileformats::on_viewerCO_currentIndexChanged(int i)
{
	bool const custom = viewerCO->itemData(i).toString() == "custom viewer";
	viewerED->setEnabled(custom);
	if (!custom)
		currentFormat().setViewer(fromqstr(viewerCO->itemData(i).toString()));
}


void PrefFileformats::on_editorCO_currentIndexChanged(int i)
{
	bool const custom = editorCO->itemData(i).toString() == "custom editor";
	editorED->setEnabled(custom);
	if (!custom)
		currentFormat().setEditor(fromqstr(editorCO->itemData(i).toString()));
}


Format & PrefFileformats::currentFormat()
{
	int const i = formatsCB->currentIndex();
	int const nr = formatsCB->itemData(i).toInt();
	return form_->formats().get(nr);
}


void PrefFileformats::on_formatNewPB_clicked()
{
	form_->formats().add("", "", docstring(), "", "", "", "", Format::none);
	updateView();
	formatsCB->setCurrentIndex(0);
	formatsCB->setFocus(Qt::OtherFocusReason);
}


void PrefFileformats::on_formatRemovePB_clicked()
{
	int const i = formatsCB->currentIndex();
	int const nr = formatsCB->itemData(i).toInt();
	string const current_text = form_->formats().get(nr).name();
	if (form_->converters().formatIsUsed(current_text)) {
		Alert::error(_("Format in use"),
			     _("Cannot remove a Format used by a Converter. "
					    "Remove the converter first."));
		return;
	}

	form_->formats().erase(current_text);
	formatsChanged();
	updateView();
	on_formatsCB_editTextChanged(formatsCB->currentText());
	changed();
}


/////////////////////////////////////////////////////////////////////
//
// PrefLanguage
//
/////////////////////////////////////////////////////////////////////

PrefLanguage::PrefLanguage(GuiPreferences * form)
	: PrefModule(catLanguage, N_("Language"), form)
{
	setupUi(this);

	connect(visualCursorRB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(logicalCursorRB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(markForeignCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(autoBeginCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(autoEndCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(languagePackageCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(languagePackageED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(globalCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(startCommandED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(endCommandED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(uiLanguageCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(defaultDecimalPointLE, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(defaultLengthUnitCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));

	languagePackageED->setValidator(new NoNewLineValidator(languagePackageED));
	startCommandED->setValidator(new NoNewLineValidator(startCommandED));
	endCommandED->setValidator(new NoNewLineValidator(endCommandED));

	defaultDecimalPointLE->setInputMask("X; ");
	defaultDecimalPointLE->setMaxLength(1);

	defaultLengthUnitCO->addItem(lyx::qt_(unit_name_gui[Length::CM]), Length::CM);
	defaultLengthUnitCO->addItem(lyx::qt_(unit_name_gui[Length::IN]), Length::IN);

	QAbstractItemModel * language_model = guiApp->languageModel();
	language_model->sort(0);
	uiLanguageCO->blockSignals(true);
	uiLanguageCO->clear();
	uiLanguageCO->addItem(qt_("Default"), toqstr("auto"));
	for (int i = 0; i != language_model->rowCount(); ++i) {
		QModelIndex index = language_model->index(i, 0);
		// Filter the list based on the available translation and add
		// each language code only once
		string const name = fromqstr(index.data(Qt::UserRole).toString());
		Language const * lang = languages.getLanguage(name);
		if (!lang)
			continue;
		// never remove the currently selected language
		if (name != form->rc().gui_language
		    && name != lyxrc.gui_language
		    && (!Messages::available(lang->code())
		        || !lang->hasGuiSupport()))
			continue;
		uiLanguageCO->addItem(index.data(Qt::DisplayRole).toString(),
		                      index.data(Qt::UserRole).toString());
	}
	uiLanguageCO->blockSignals(false);
}


void PrefLanguage::on_uiLanguageCO_currentIndexChanged(int)
{
	 QMessageBox::information(this, qt_("LyX needs to be restarted!"),
		 qt_("The change of user interface language will be fully "
		 "effective only after a restart."));
}


void PrefLanguage::on_languagePackageCO_currentIndexChanged(int i)
{
	 languagePackageED->setEnabled(i == 2);
}


void PrefLanguage::applyRC(LyXRC & rc) const
{
	rc.visual_cursor = visualCursorRB->isChecked();
	rc.mark_foreign_language = markForeignCB->isChecked();
	rc.language_auto_begin = autoBeginCB->isChecked();
	rc.language_auto_end = autoEndCB->isChecked();
	int const p = languagePackageCO->currentIndex();
	if (p == 0)
		rc.language_package_selection = LyXRC::LP_AUTO;
	else if (p == 1)
		rc.language_package_selection = LyXRC::LP_BABEL;
	else if (p == 2)
		rc.language_package_selection = LyXRC::LP_CUSTOM;
	else if (p == 3)
		rc.language_package_selection = LyXRC::LP_NONE;
	rc.language_custom_package = fromqstr(languagePackageED->text());
	rc.language_global_options = globalCB->isChecked();
	rc.language_command_begin = fromqstr(startCommandED->text());
	rc.language_command_end = fromqstr(endCommandED->text());
	rc.gui_language = fromqstr(
		uiLanguageCO->itemData(uiLanguageCO->currentIndex()).toString());
	rc.default_decimal_point = fromqstr(defaultDecimalPointLE->text());
	rc.default_length_unit = (Length::UNIT) defaultLengthUnitCO->itemData(defaultLengthUnitCO->currentIndex()).toInt();
}


void PrefLanguage::updateRC(LyXRC const & rc)
{
	if (rc.visual_cursor)
		visualCursorRB->setChecked(true);
	else
		logicalCursorRB->setChecked(true);
	markForeignCB->setChecked(rc.mark_foreign_language);
	autoBeginCB->setChecked(rc.language_auto_begin);
	autoEndCB->setChecked(rc.language_auto_end);
	languagePackageCO->setCurrentIndex(rc.language_package_selection);
	languagePackageED->setText(toqstr(rc.language_custom_package));
	languagePackageED->setEnabled(languagePackageCO->currentIndex() == 2);
	globalCB->setChecked(rc.language_global_options);
	startCommandED->setText(toqstr(rc.language_command_begin));
	endCommandED->setText(toqstr(rc.language_command_end));
	defaultDecimalPointLE->setText(toqstr(rc.default_decimal_point));
	int pos = defaultLengthUnitCO->findData(int(rc.default_length_unit));
	defaultLengthUnitCO->setCurrentIndex(pos);

	pos = uiLanguageCO->findData(toqstr(rc.gui_language));
	uiLanguageCO->blockSignals(true);
	uiLanguageCO->setCurrentIndex(pos);
	uiLanguageCO->blockSignals(false);
}


/////////////////////////////////////////////////////////////////////
//
// PrefUserInterface
//
/////////////////////////////////////////////////////////////////////

PrefUserInterface::PrefUserInterface(GuiPreferences * form)
	: PrefModule(catLookAndFeel, N_("User Interface"), form)
{
	setupUi(this);

	connect(uiFilePB, SIGNAL(clicked()),
		this, SLOT(selectUi()));
	connect(uiFileED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(iconSetCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(useSystemThemeIconsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(lastfilesSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(tooltipCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	lastfilesSB->setMaximum(maxlastfiles);

	iconSetCO->addItem(qt_("Default"), QString());
	iconSetCO->addItem(qt_("Classic"), "classic");
	iconSetCO->addItem(qt_("Oxygen"), "oxygen");

#if (!(defined Q_WS_X11 || defined(QPA_XCB)) || QT_VERSION < 0x040600)
	useSystemThemeIconsCB->hide();
#endif
}


void PrefUserInterface::applyRC(LyXRC & rc) const
{
	rc.icon_set = fromqstr(iconSetCO->itemData(
		iconSetCO->currentIndex()).toString());

	rc.ui_file = internal_path(fromqstr(uiFileED->text()));
	rc.use_system_theme_icons = useSystemThemeIconsCB->isChecked();
	rc.num_lastfiles = lastfilesSB->value();
	rc.use_tooltip = tooltipCB->isChecked();
}


void PrefUserInterface::updateRC(LyXRC const & rc)
{
	int iconset = iconSetCO->findData(toqstr(rc.icon_set));
	if (iconset < 0)
		iconset = 0;
	iconSetCO->setCurrentIndex(iconset);
	useSystemThemeIconsCB->setChecked(rc.use_system_theme_icons);
	uiFileED->setText(toqstr(external_path(rc.ui_file)));
	lastfilesSB->setValue(rc.num_lastfiles);
	tooltipCB->setChecked(rc.use_tooltip);
}


void PrefUserInterface::selectUi()
{
	QString file = form_->browseUI(internalPath(uiFileED->text()));
	if (!file.isEmpty())
		uiFileED->setText(file);
}


/////////////////////////////////////////////////////////////////////
//
// PrefDocumentHandling
//
/////////////////////////////////////////////////////////////////////

PrefDocHandling::PrefDocHandling(GuiPreferences * form)
	: PrefModule(catLookAndFeel, N_("Document Handling"), form)
{
	setupUi(this);

	connect(autoSaveCB, SIGNAL(toggled(bool)),
		autoSaveSB, SLOT(setEnabled(bool)));
	connect(autoSaveCB, SIGNAL(toggled(bool)),
		TextLabel1, SLOT(setEnabled(bool)));
	connect(openDocumentsInTabsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(singleInstanceCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(singleCloseTabButtonCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(closeLastViewCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(restoreCursorCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(loadSessionCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(allowGeometrySessionCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(autoSaveSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(autoSaveCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(backupCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(saveCompressedCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(saveOriginCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
}


void PrefDocHandling::applyRC(LyXRC & rc) const
{
	rc.use_lastfilepos = restoreCursorCB->isChecked();
	rc.load_session = loadSessionCB->isChecked();
	rc.allow_geometry_session = allowGeometrySessionCB->isChecked();
	rc.autosave = autoSaveCB->isChecked() ?  autoSaveSB->value() * 60 : 0;
	rc.make_backup = backupCB->isChecked();
	rc.save_compressed = saveCompressedCB->isChecked();
	rc.save_origin = saveOriginCB->isChecked();
	rc.open_buffers_in_tabs = openDocumentsInTabsCB->isChecked();
	rc.single_instance = singleInstanceCB->isChecked();
	rc.single_close_tab_button = singleCloseTabButtonCB->isChecked();

	switch (closeLastViewCO->currentIndex()) {
	case 0:
		rc.close_buffer_with_last_view = "yes";
		break;
	case 1:
		rc.close_buffer_with_last_view = "no";
		break;
	case 2:
		rc.close_buffer_with_last_view = "ask";
		break;
	default:
		;
	}
}


void PrefDocHandling::updateRC(LyXRC const & rc)
{
	restoreCursorCB->setChecked(rc.use_lastfilepos);
	loadSessionCB->setChecked(rc.load_session);
	allowGeometrySessionCB->setChecked(rc.allow_geometry_session);
	// convert to minutes
	bool autosave = rc.autosave > 0;
	int mins = rc.autosave / 60;
	if (!mins)
		mins = 5;
	autoSaveSB->setValue(mins);
	autoSaveCB->setChecked(autosave);
	autoSaveSB->setEnabled(autosave);
	backupCB->setChecked(rc.make_backup);
	saveCompressedCB->setChecked(rc.save_compressed);
	saveOriginCB->setChecked(rc.save_origin);
	openDocumentsInTabsCB->setChecked(rc.open_buffers_in_tabs);
	singleInstanceCB->setChecked(rc.single_instance && !rc.lyxpipes.empty());
	singleInstanceCB->setEnabled(!rc.lyxpipes.empty());
	singleCloseTabButtonCB->setChecked(rc.single_close_tab_button);
	if (rc.close_buffer_with_last_view == "yes")
		closeLastViewCO->setCurrentIndex(0);
	else if (rc.close_buffer_with_last_view == "no")
		closeLastViewCO->setCurrentIndex(1);
	else if (rc.close_buffer_with_last_view == "ask")
		closeLastViewCO->setCurrentIndex(2);
}


void PrefDocHandling::on_clearSessionPB_clicked()
{
	guiApp->clearSession();
}



/////////////////////////////////////////////////////////////////////
//
// PrefEdit
//
/////////////////////////////////////////////////////////////////////

PrefEdit::PrefEdit(GuiPreferences * form)
	: PrefModule(catEditing, N_("Control"), form)
{
	setupUi(this);

	connect(cursorFollowsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(scrollBelowCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(macLikeCursorMovementCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(sortEnvironmentsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(groupEnvironmentsCB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(macroEditStyleCO, SIGNAL(activated(int)),
		this, SIGNAL(changed()));
	connect(cursorWidthSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(fullscreenLimitGB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(fullscreenWidthSB, SIGNAL(valueChanged(int)),
		this, SIGNAL(changed()));
	connect(toggleTabbarCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(toggleMenubarCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(toggleScrollbarCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(toggleStatusbarCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
	connect(toggleToolbarsCB, SIGNAL(toggled(bool)),
		this, SIGNAL(changed()));
}


void PrefEdit::applyRC(LyXRC & rc) const
{
	rc.cursor_follows_scrollbar = cursorFollowsCB->isChecked();
	rc.scroll_below_document = scrollBelowCB->isChecked();
	rc.mac_like_cursor_movement = macLikeCursorMovementCB->isChecked();
	rc.sort_layouts = sortEnvironmentsCB->isChecked();
	rc.group_layouts = groupEnvironmentsCB->isChecked();
	switch (macroEditStyleCO->currentIndex()) {
		case 0: rc.macro_edit_style = LyXRC::MACRO_EDIT_INLINE_BOX; break;
		case 1:	rc.macro_edit_style = LyXRC::MACRO_EDIT_INLINE; break;
		case 2:	rc.macro_edit_style = LyXRC::MACRO_EDIT_LIST;	break;
	}
	rc.cursor_width = cursorWidthSB->value();
	rc.full_screen_toolbars = toggleToolbarsCB->isChecked();
	rc.full_screen_scrollbar = toggleScrollbarCB->isChecked();
	rc.full_screen_statusbar = toggleStatusbarCB->isChecked();
	rc.full_screen_tabbar = toggleTabbarCB->isChecked();
	rc.full_screen_menubar = toggleMenubarCB->isChecked();
	rc.full_screen_width = fullscreenWidthSB->value();
	rc.full_screen_limit = fullscreenLimitGB->isChecked();
}


void PrefEdit::updateRC(LyXRC const & rc)
{
	cursorFollowsCB->setChecked(rc.cursor_follows_scrollbar);
	scrollBelowCB->setChecked(rc.scroll_below_document);
	macLikeCursorMovementCB->setChecked(rc.mac_like_cursor_movement);
	sortEnvironmentsCB->setChecked(rc.sort_layouts);
	groupEnvironmentsCB->setChecked(rc.group_layouts);
	macroEditStyleCO->setCurrentIndex(rc.macro_edit_style);
	cursorWidthSB->setValue(rc.cursor_width);
	toggleScrollbarCB->setChecked(rc.full_screen_scrollbar);
	toggleStatusbarCB->setChecked(rc.full_screen_statusbar);
	toggleToolbarsCB->setChecked(rc.full_screen_toolbars);
	toggleTabbarCB->setChecked(rc.full_screen_tabbar);
	toggleMenubarCB->setChecked(rc.full_screen_menubar);
	fullscreenWidthSB->setValue(rc.full_screen_width);
	fullscreenLimitGB->setChecked(rc.full_screen_limit);
}


/////////////////////////////////////////////////////////////////////
//
// PrefShortcuts
//
/////////////////////////////////////////////////////////////////////


GuiShortcutDialog::GuiShortcutDialog(QWidget * parent) : QDialog(parent)
{
	Ui::shortcutUi::setupUi(this);
	QDialog::setModal(true);
}


PrefShortcuts::PrefShortcuts(GuiPreferences * form)
	: PrefModule(catEditing, N_("Shortcuts"), form),
	  editItem_(0), mathItem_(0), bufferItem_(0), layoutItem_(0),
	  systemItem_(0)
{
	setupUi(this);

	shortcutsTW->setColumnCount(2);
	shortcutsTW->headerItem()->setText(0, qt_("Function"));
	shortcutsTW->headerItem()->setText(1, qt_("Shortcut"));
	shortcutsTW->setSortingEnabled(true);
	// Multi-selection can be annoying.
	// shortcutsTW->setSelectionMode(QAbstractItemView::MultiSelection);

	connect(bindFilePB, SIGNAL(clicked()),
		this, SLOT(selectBind()));
	connect(bindFileED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	shortcut_ = new GuiShortcutDialog(this);
	shortcut_bc_.setPolicy(ButtonPolicy::OkCancelPolicy);
	shortcut_bc_.setOK(shortcut_->okPB);
	shortcut_bc_.setCancel(shortcut_->cancelPB);

	connect(shortcut_->okPB, SIGNAL(clicked()),
		this, SIGNAL(changed()));
	connect(shortcut_->cancelPB, SIGNAL(clicked()),
		shortcut_, SLOT(reject()));
	connect(shortcut_->clearPB, SIGNAL(clicked()),
		this, SLOT(shortcutClearPressed()));
	connect(shortcut_->removePB, SIGNAL(clicked()),
		this, SLOT(shortcutRemovePressed()));
	connect(shortcut_->okPB, SIGNAL(clicked()),
		this, SLOT(shortcutOkPressed()));
	connect(shortcut_->cancelPB, SIGNAL(clicked()),
		this, SLOT(shortcutCancelPressed()));
}


void PrefShortcuts::applyRC(LyXRC & rc) const
{
	rc.bind_file = internal_path(fromqstr(bindFileED->text()));
	// write user_bind and user_unbind to .lyx/bind/user.bind
	FileName bind_dir(addPath(package().user_support().absFileName(), "bind"));
	if (!bind_dir.exists() && !bind_dir.createDirectory(0777)) {
		lyxerr << "LyX could not create the user bind directory '"
		       << bind_dir << "'. All user-defined key bindings will be lost." << endl;
		return;
	}
	if (!bind_dir.isDirWritable()) {
		lyxerr << "LyX could not write to the user bind directory '"
		       << bind_dir << "'. All user-defined key bindings will be lost." << endl;
		return;
	}
	FileName user_bind_file(bind_dir.absFileName() + "/user.bind");
	user_unbind_.write(user_bind_file.toFilesystemEncoding(), false, true);
	user_bind_.write(user_bind_file.toFilesystemEncoding(), true, false);
	// immediately apply the keybindings. Why this is not done before?
	// The good thing is that the menus are updated automatically.
	theTopLevelKeymap().clear();
	theTopLevelKeymap().read("site");
	theTopLevelKeymap().read(rc.bind_file, 0, KeyMap::Fallback);
	theTopLevelKeymap().read("user", 0, KeyMap::MissingOK);
}


void PrefShortcuts::updateRC(LyXRC const & rc)
{
	bindFileED->setText(toqstr(external_path(rc.bind_file)));
	//
	system_bind_.clear();
	user_bind_.clear();
	user_unbind_.clear();
	system_bind_.read("site");
	system_bind_.read(rc.bind_file);
	// \unbind in user.bind is added to user_unbind_
	user_bind_.read("user", &user_unbind_, KeyMap::MissingOK);
	updateShortcutsTW();
}


void PrefShortcuts::updateShortcutsTW()
{
	shortcutsTW->clear();

	editItem_ = new QTreeWidgetItem(shortcutsTW);
	editItem_->setText(0, qt_("Cursor, Mouse and Editing Functions"));
	editItem_->setFlags(editItem_->flags() & ~Qt::ItemIsSelectable);

	mathItem_ = new QTreeWidgetItem(shortcutsTW);
	mathItem_->setText(0, qt_("Mathematical Symbols"));
	mathItem_->setFlags(mathItem_->flags() & ~Qt::ItemIsSelectable);

	bufferItem_ = new QTreeWidgetItem(shortcutsTW);
	bufferItem_->setText(0, qt_("Document and Window"));
	bufferItem_->setFlags(bufferItem_->flags() & ~Qt::ItemIsSelectable);

	layoutItem_ = new QTreeWidgetItem(shortcutsTW);
	layoutItem_->setText(0, qt_("Font, Layouts and Textclasses"));
	layoutItem_->setFlags(layoutItem_->flags() & ~Qt::ItemIsSelectable);

	systemItem_ = new QTreeWidgetItem(shortcutsTW);
	systemItem_->setText(0, qt_("System and Miscellaneous"));
	systemItem_->setFlags(systemItem_->flags() & ~Qt::ItemIsSelectable);

	// listBindings(unbound=true) lists all bound and unbound lfuns
	// Items in this list is tagged by its source.
	KeyMap::BindingList bindinglist = system_bind_.listBindings(true,
		KeyMap::System);
	KeyMap::BindingList user_bindinglist = user_bind_.listBindings(false,
		KeyMap::UserBind);
	KeyMap::BindingList user_unbindinglist = user_unbind_.listBindings(false,
		KeyMap::UserUnbind);
	bindinglist.insert(bindinglist.end(), user_bindinglist.begin(),
			user_bindinglist.end());
	bindinglist.insert(bindinglist.end(), user_unbindinglist.begin(),
			user_unbindinglist.end());

	KeyMap::BindingList::const_iterator it = bindinglist.begin();
	KeyMap::BindingList::const_iterator it_end = bindinglist.end();
	for (; it != it_end; ++it)
		insertShortcutItem(it->request, it->sequence, it->tag);

	shortcutsTW->sortItems(0, Qt::AscendingOrder);
	on_shortcutsTW_itemSelectionChanged();
	on_searchLE_textEdited();
	shortcutsTW->resizeColumnToContents(0);
}


//static
KeyMap::ItemType PrefShortcuts::itemType(QTreeWidgetItem & item)
{
	return static_cast<KeyMap::ItemType>(item.data(0, Qt::UserRole).toInt());
}


//static
bool PrefShortcuts::isAlwaysHidden(QTreeWidgetItem & item)
{
	// Hide rebound system settings that are empty
	return itemType(item) == KeyMap::UserUnbind && item.text(1).isEmpty();
}


void PrefShortcuts::setItemType(QTreeWidgetItem * item, KeyMap::ItemType tag)
{
	item->setData(0, Qt::UserRole, QVariant(tag));
	QFont font;

	switch (tag) {
	case KeyMap::System:
		break;
	case KeyMap::UserBind:
		font.setBold(true);
		break;
	case KeyMap::UserUnbind:
		font.setStrikeOut(true);
		break;
	// this item is not displayed now.
	case KeyMap::UserExtraUnbind:
		font.setStrikeOut(true);
		break;
	}
	item->setHidden(isAlwaysHidden(*item));
	item->setFont(1, font);
}


QTreeWidgetItem * PrefShortcuts::insertShortcutItem(FuncRequest const & lfun,
		KeySequence const & seq, KeyMap::ItemType tag)
{
	FuncCode const action = lfun.action();
	string const action_name = lyxaction.getActionName(action);
	QString const lfun_name = toqstr(from_utf8(action_name)
			+ ' ' + lfun.argument());
	QString const shortcut = toqstr(seq.print(KeySequence::ForGui));

	QTreeWidgetItem * newItem = 0;
	// for unbind items, try to find an existing item in the system bind list
	if (tag == KeyMap::UserUnbind) {
		QList<QTreeWidgetItem*> const items = shortcutsTW->findItems(lfun_name,
			Qt::MatchFlags(Qt::MatchExactly | Qt::MatchRecursive), 0);
		for (int i = 0; i < items.size(); ++i) {
			if (items[i]->text(1) == shortcut) {
				newItem = items[i];
				break;
			}
		}
		// if not found, this unbind item is KeyMap::UserExtraUnbind
		// Such an item is not displayed to avoid confusion (what is
		// unmatched removed?).
		if (!newItem) {
			return 0;
		}
	}
	if (!newItem) {
		switch(lyxaction.getActionType(action)) {
		case LyXAction::Hidden:
			return 0;
		case LyXAction::Edit:
			newItem = new QTreeWidgetItem(editItem_);
			break;
		case LyXAction::Math:
			newItem = new QTreeWidgetItem(mathItem_);
			break;
		case LyXAction::Buffer:
			newItem = new QTreeWidgetItem(bufferItem_);
			break;
		case LyXAction::Layout:
			newItem = new QTreeWidgetItem(layoutItem_);
			break;
		case LyXAction::System:
			newItem = new QTreeWidgetItem(systemItem_);
			break;
		default:
			// this should not happen
			newItem = new QTreeWidgetItem(shortcutsTW);
		}
	}

	newItem->setText(0, lfun_name);
	newItem->setText(1, shortcut);
	// record BindFile representation to recover KeySequence when needed.
	newItem->setData(1, Qt::UserRole, toqstr(seq.print(KeySequence::BindFile)));
	setItemType(newItem, tag);
	return newItem;
}


void PrefShortcuts::on_shortcutsTW_itemSelectionChanged()
{
	QList<QTreeWidgetItem*> items = shortcutsTW->selectedItems();
	removePB->setEnabled(!items.isEmpty() && !items[0]->text(1).isEmpty());
	modifyPB->setEnabled(!items.isEmpty());
	if (items.isEmpty())
		return;

	if (itemType(*items[0]) == KeyMap::UserUnbind)
		removePB->setText(qt_("Res&tore"));
	else
		removePB->setText(qt_("Remo&ve"));
}


void PrefShortcuts::on_shortcutsTW_itemDoubleClicked()
{
	modifyShortcut();
}


void PrefShortcuts::modifyShortcut()
{
	QTreeWidgetItem * item = shortcutsTW->currentItem();
	if (item->flags() & Qt::ItemIsSelectable) {
		shortcut_->lfunLE->setText(item->text(0));
		save_lfun_ = item->text(0).trimmed();
		shortcut_->shortcutWG->setText(item->text(1));
		KeySequence seq;
		seq.parse(fromqstr(item->data(1, Qt::UserRole).toString()));
		shortcut_->shortcutWG->setKeySequence(seq);
		shortcut_->shortcutWG->setFocus();
		shortcut_->exec();
	}
}


void PrefShortcuts::unhideEmpty(QString const & lfun, bool select)
{
	// list of items that match lfun
	QList<QTreeWidgetItem*> items = shortcutsTW->findItems(lfun,
	     Qt::MatchFlags(Qt::MatchExactly | Qt::MatchRecursive), 0);
	for (int i = 0; i < items.size(); ++i) {
		QTreeWidgetItem * item = items[i];
		if (isAlwaysHidden(*item)) {
			setItemType(item, KeyMap::System);
			if (select)
				shortcutsTW->setCurrentItem(item);
			return;
		}
	}
}


void PrefShortcuts::removeShortcut()
{
	// it seems that only one item can be selected, but I am
	// removing all selected items anyway.
	QList<QTreeWidgetItem*> items = shortcutsTW->selectedItems();
	for (int i = 0; i < items.size(); ++i) {
		string shortcut = fromqstr(items[i]->data(1, Qt::UserRole).toString());
		string lfun = fromqstr(items[i]->text(0));
		FuncRequest func = lyxaction.lookupFunc(lfun);

		switch (itemType(*items[i])) {
		case KeyMap::System: {
			// for system bind, we do not touch the item
			// but add an user unbind item
			user_unbind_.bind(shortcut, func);
			setItemType(items[i], KeyMap::UserUnbind);
			removePB->setText(qt_("Res&tore"));
			break;
		}
		case KeyMap::UserBind: {
			// for user_bind, we remove this bind
			QTreeWidgetItem * parent = items[i]->parent();
			int itemIdx = parent->indexOfChild(items[i]);
			parent->takeChild(itemIdx);
			if (itemIdx > 0)
				shortcutsTW->scrollToItem(parent->child(itemIdx - 1));
			else
				shortcutsTW->scrollToItem(parent);
			user_bind_.unbind(shortcut, func);
			// If this user binding hid an empty system binding, unhide the
			// latter and select it.
			unhideEmpty(items[i]->text(0), true);
			break;
		}
		case KeyMap::UserUnbind: {
			// for user_unbind, we remove the unbind, and the item
			// become KeyMap::System again.
			KeySequence seq;
			seq.parse(shortcut);
			// Ask the user to replace current binding
			if (!validateNewShortcut(func, seq, QString()))
				break;
			user_unbind_.unbind(shortcut, func);
			setItemType(items[i], KeyMap::System);
			removePB->setText(qt_("Remo&ve"));
			break;
		}
		case KeyMap::UserExtraUnbind: {
			// for user unbind that is not in system bind file,
			// remove this unbind file
			QTreeWidgetItem * parent = items[i]->parent();
			parent->takeChild(parent->indexOfChild(items[i]));
			user_unbind_.unbind(shortcut, func);
		}
		}
	}
}


void PrefShortcuts::deactivateShortcuts(QList<QTreeWidgetItem*> const & items)
{
	for (int i = 0; i < items.size(); ++i) {
		string shortcut = fromqstr(items[i]->data(1, Qt::UserRole).toString());
		string lfun = fromqstr(items[i]->text(0));
		FuncRequest func = lyxaction.lookupFunc(lfun);

		switch (itemType(*items[i])) {
		case KeyMap::System:
			// for system bind, we do not touch the item
			// but add an user unbind item
			user_unbind_.bind(shortcut, func);
			setItemType(items[i], KeyMap::UserUnbind);
			break;

		case KeyMap::UserBind: {
			// for user_bind, we remove this bind
			QTreeWidgetItem * parent = items[i]->parent();
			int itemIdx = parent->indexOfChild(items[i]);
			parent->takeChild(itemIdx);
			user_bind_.unbind(shortcut, func);
			unhideEmpty(items[i]->text(0), false);
			break;
		}
		default:
			break;
		}
	}
}


void PrefShortcuts::selectBind()
{
	QString file = form_->browsebind(internalPath(bindFileED->text()));
	if (!file.isEmpty()) {
		bindFileED->setText(file);
		system_bind_ = KeyMap();
		system_bind_.read(fromqstr(file));
		updateShortcutsTW();
	}
}


void PrefShortcuts::on_modifyPB_pressed()
{
	modifyShortcut();
}


void PrefShortcuts::on_newPB_pressed()
{
	shortcut_->lfunLE->clear();
	shortcut_->shortcutWG->reset();
	save_lfun_ = QString();
	shortcut_->exec();
}


void PrefShortcuts::on_removePB_pressed()
{
	changed();
	removeShortcut();
}


void PrefShortcuts::on_searchLE_textEdited()
{
	if (searchLE->text().isEmpty()) {
		// show all hidden items
		QTreeWidgetItemIterator it(shortcutsTW, QTreeWidgetItemIterator::Hidden);
		for (; *it; ++it)
			shortcutsTW->setItemHidden(*it, isAlwaysHidden(**it));
		// close all categories
		for (int i = 0; i < shortcutsTW->topLevelItemCount(); ++i)
			shortcutsTW->collapseItem(shortcutsTW->topLevelItem(i));
		return;
	}
	// search both columns
	QList<QTreeWidgetItem *> matched = shortcutsTW->findItems(searchLE->text(),
		Qt::MatchFlags(Qt::MatchContains | Qt::MatchRecursive), 0);
	matched += shortcutsTW->findItems(searchLE->text(),
		Qt::MatchFlags(Qt::MatchContains | Qt::MatchRecursive), 1);

	// hide everyone (to avoid searching in matched QList repeatedly
	QTreeWidgetItemIterator it(shortcutsTW, QTreeWidgetItemIterator::Selectable);
	while (*it)
		shortcutsTW->setItemHidden(*it++, true);
	// show matched items
	for (int i = 0; i < matched.size(); ++i)
		if (!isAlwaysHidden(*matched[i])) {
			shortcutsTW->setItemHidden(matched[i], false);
			shortcutsTW->setItemExpanded(matched[i]->parent(), true);
		}
}


docstring makeCmdString(FuncRequest const & f)
{
	docstring actionStr = from_ascii(lyxaction.getActionName(f.action()));
	if (!f.argument().empty())
		actionStr += " " + f.argument();
	return actionStr;
}


FuncRequest PrefShortcuts::currentBinding(KeySequence const & k)
{
	FuncRequest res = user_bind_.getBinding(k);
	if (res.action() != LFUN_UNKNOWN_ACTION)
		return res;
	res = system_bind_.getBinding(k);
	// Check if it is unbound. Note: user_unbind_ can only unbind one
	// FuncRequest per key sequence.
	if (user_unbind_.getBinding(k) == res)
		return FuncRequest::unknown;
	return res;
}


bool PrefShortcuts::validateNewShortcut(FuncRequest const & func,
                                        KeySequence const & k,
                                        QString const & lfun_to_modify)
{
	if (func.action() == LFUN_UNKNOWN_ACTION) {
		Alert::error(_("Failed to create shortcut"),
			_("Unknown or invalid LyX function"));
		return false;
	}

	// It is not currently possible to bind Hidden lfuns such as self-insert. In
	// the future, to remove this limitation, see GuiPrefs::insertShortcutItem
	// and how it is used in GuiPrefs::shortcutOkPressed.
	if (lyxaction.getActionType(func.action()) == LyXAction::Hidden) {
		Alert::error(_("Failed to create shortcut"),
			_("This LyX function is hidden and cannot be bound."));
		return false;
	}

	if (k.length() == 0) {
		Alert::error(_("Failed to create shortcut"),
			_("Invalid or empty key sequence"));
		return false;
	}

	FuncRequest oldBinding = currentBinding(k);
	if (oldBinding == func)
		// nothing to change
		return false;

	// make sure this key isn't already bound---and, if so, prompt user
	// (exclude the lfun the user already wants to modify)
	docstring const action_string = makeCmdString(oldBinding);
	if (oldBinding.action() != LFUN_UNKNOWN_ACTION
	    && lfun_to_modify != toqstr(action_string)) {
		docstring const new_action_string = makeCmdString(func);
		docstring const text = bformat(_("Shortcut `%1$s' is already bound to "
						 "%2$s.\n"
						 "Are you sure you want to unbind the "
						 "current shortcut and bind it to %3$s?"),
					       k.print(KeySequence::ForGui), action_string,
					       new_action_string);
		int ret = Alert::prompt(_("Redefine shortcut?"),
					text, 0, 1, _("&Redefine"), _("&Cancel"));
		if (ret != 0)
			return false;
		QString const sequence_text = toqstr(k.print(KeySequence::ForGui));
		QList<QTreeWidgetItem*> items = shortcutsTW->findItems(sequence_text,
			Qt::MatchFlags(Qt::MatchExactly | Qt::MatchRecursive), 1);
		deactivateShortcuts(items);
	}
	return true;
}


void PrefShortcuts::shortcutOkPressed()
{
	QString const new_lfun = shortcut_->lfunLE->text();
	FuncRequest func = lyxaction.lookupFunc(fromqstr(new_lfun));
	KeySequence k = shortcut_->shortcutWG->getKeySequence();

	// save_lfun_ contains the text of the lfun to modify, if the user clicked
	// "modify", or is empty if they clicked "new" (which I do not really like)
	if (!validateNewShortcut(func, k, save_lfun_))
		return;

	if (!save_lfun_.isEmpty()) {
		// real modification of the lfun's shortcut,
		// so remove the previous one
		QList<QTreeWidgetItem*> to_modify = shortcutsTW->selectedItems();
		deactivateShortcuts(to_modify);
	}

	shortcut_->accept();

	QTreeWidgetItem * item = insertShortcutItem(func, k, KeyMap::UserBind);
	if (item) {
		user_bind_.bind(&k, func);
		shortcutsTW->sortItems(0, Qt::AscendingOrder);
		shortcutsTW->setItemExpanded(item->parent(), true);
		shortcutsTW->setCurrentItem(item);
		shortcutsTW->scrollToItem(item);
	} else {
		Alert::error(_("Failed to create shortcut"),
			_("Can not insert shortcut to the list"));
		return;
	}
}


void PrefShortcuts::shortcutCancelPressed()
{
	shortcut_->shortcutWG->reset();
}


void PrefShortcuts::shortcutClearPressed()
{
	shortcut_->shortcutWG->reset();
}


void PrefShortcuts::shortcutRemovePressed()
{
	shortcut_->shortcutWG->removeFromSequence();
}


/////////////////////////////////////////////////////////////////////
//
// PrefIdentity
//
/////////////////////////////////////////////////////////////////////

PrefIdentity::PrefIdentity(GuiPreferences * form)
	: PrefModule(QString(), N_("Identity"), form)
{
	setupUi(this);

	connect(nameED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));
	connect(emailED, SIGNAL(textChanged(QString)),
		this, SIGNAL(changed()));

	nameED->setValidator(new NoNewLineValidator(nameED));
	emailED->setValidator(new NoNewLineValidator(emailED));
}


void PrefIdentity::applyRC(LyXRC & rc) const
{
	rc.user_name = fromqstr(nameED->text());
	rc.user_email = fromqstr(emailED->text());
}


void PrefIdentity::updateRC(LyXRC const & rc)
{
	nameED->setText(toqstr(rc.user_name));
	emailED->setText(toqstr(rc.user_email));
}



/////////////////////////////////////////////////////////////////////
//
// GuiPreferences
//
/////////////////////////////////////////////////////////////////////

GuiPreferences::GuiPreferences(GuiView & lv)
	: GuiDialog(lv, "prefs", qt_("Preferences")), update_screen_font_(false),
	  update_previews_(false)
{
	setupUi(this);

	QDialog::setModal(false);

	connect(savePB, SIGNAL(clicked()), this, SLOT(slotOK()));
	connect(applyPB, SIGNAL(clicked()), this, SLOT(slotApply()));
	connect(closePB, SIGNAL(clicked()), this, SLOT(slotClose()));
	connect(restorePB, SIGNAL(clicked()), this, SLOT(slotRestore()));

	addModule(new PrefUserInterface(this));
	addModule(new PrefDocHandling(this));
	addModule(new PrefEdit(this));
	addModule(new PrefShortcuts(this));
	PrefScreenFonts * screenfonts = new PrefScreenFonts(this);
	connect(this, SIGNAL(prefsApplied(LyXRC const &)),
			screenfonts, SLOT(updateScreenFontSizes(LyXRC const &)));
	addModule(screenfonts);
	addModule(new PrefColors(this));
	addModule(new PrefDisplay(this));
	addModule(new PrefInput(this));
	addModule(new PrefCompletion(this));

	addModule(new PrefPaths(this));

	addModule(new PrefIdentity(this));

	addModule(new PrefLanguage(this));
	addModule(new PrefSpellchecker(this));

	//for strftime validator
	PrefOutput * output = new PrefOutput(this);
	addModule(output);
	addModule(new PrefLatex(this));

	PrefConverters * converters = new PrefConverters(this);
	PrefFileformats * formats = new PrefFileformats(this);
	connect(formats, SIGNAL(formatsChanged()),
			converters, SLOT(updateGui()));
	addModule(converters);
	addModule(formats);

	prefsPS->setCurrentPanel("User Interface");
// FIXME: hack to work around resizing bug in Qt >= 4.2
// bug verified with Qt 4.2.{0-3} (JSpitzm)
#if QT_VERSION >= 0x040200
	prefsPS->updateGeometry();
#endif

	bc().setPolicy(ButtonPolicy::PreferencesPolicy);
	bc().setOK(savePB);
	bc().setApply(applyPB);
	bc().setCancel(closePB);
	bc().setRestore(restorePB);

	// initialize the strftime validator
	bc().addCheckedLineEdit(output->DateED);
}


void GuiPreferences::addModule(PrefModule * module)
{
	LASSERT(module, return);
	if (module->category().isEmpty())
		prefsPS->addPanel(module, module->title());
	else
		prefsPS->addPanel(module, module->title(), module->category());
	connect(module, SIGNAL(changed()), this, SLOT(change_adaptor()));
	modules_.push_back(module);
}


void GuiPreferences::change_adaptor()
{
	changed();
}


void GuiPreferences::applyRC(LyXRC & rc) const
{
	size_t end = modules_.size();
	for (size_t i = 0; i != end; ++i)
		modules_[i]->applyRC(rc);
}


void GuiPreferences::updateRC(LyXRC const & rc)
{
	size_t const end = modules_.size();
	for (size_t i = 0; i != end; ++i)
		modules_[i]->updateRC(rc);
}


void GuiPreferences::applyView()
{
	applyRC(rc());
}


bool GuiPreferences::initialiseParams(string const &)
{
	rc_ = lyxrc;
	formats_ = lyx::formats;
	converters_ = theConverters();
	converters_.update(formats_);
	movers_ = theMovers();
	colors_.clear();
	update_screen_font_ = false;
	update_previews_ = false;

	updateRC(rc_);
	// Make sure that the bc is in the INITIAL state
	if (bc().policy().buttonStatus(ButtonPolicy::RESTORE))
		bc().restore();

	return true;
}


void GuiPreferences::dispatchParams()
{
	ostringstream ss;
	rc_.write(ss, true);
	dispatch(FuncRequest(LFUN_LYXRC_APPLY, ss.str()));
	// issue prefsApplied signal. This will update the
	// localized screen font sizes.
	prefsApplied(rc_);
	// FIXME: these need lfuns
	// FIXME UNICODE
	Author const & author =
		Author(from_utf8(rc_.user_name), from_utf8(rc_.user_email));
	theBufferList().recordCurrentAuthor(author);

	lyx::formats = formats_;

	theConverters() = converters_;
	theConverters().update(lyx::formats);
	theConverters().buildGraph();
	theBufferList().invalidateConverterCache();
	
	theMovers() = movers_;

	vector<string>::const_iterator it = colors_.begin();
	vector<string>::const_iterator const end = colors_.end();
	for (; it != end; ++it)
		dispatch(FuncRequest(LFUN_SET_COLOR, *it));
	colors_.clear();

	if (update_screen_font_) {
		dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
		// resets flag in case second apply in same dialog
		update_screen_font_ = false;
	}

        if (update_previews_) {
		// resets flag in case second apply in same dialog
		theBufferList().updatePreviews();
		update_previews_ = false;
	}

	// The Save button has been pressed
	if (isClosing())
		dispatch(FuncRequest(LFUN_PREFERENCES_SAVE));
}


void GuiPreferences::setColor(ColorCode col, QString const & hex)
{
	colors_.push_back(lcolor.getLyXName(col) + ' ' + fromqstr(hex));
}


void GuiPreferences::updateScreenFonts()
{
	update_screen_font_ = true;
}


void GuiPreferences::updatePreviews()
{
	update_previews_ = true;
}


QString GuiPreferences::browsebind(QString const & file) const
{
	return browseLibFile("bind", file, "bind", qt_("Choose bind file"),
			     QStringList(qt_("LyX bind files (*.bind)")));
}


QString GuiPreferences::browseUI(QString const & file) const
{
	return browseLibFile("ui", file, "ui", qt_("Choose UI file"),
			     QStringList(qt_("LyX UI files (*.ui)")));
}


QString GuiPreferences::browsekbmap(QString const & file) const
{
	return browseLibFile("kbd", file, "kmap", qt_("Choose keyboard map"),
			     QStringList(qt_("LyX keyboard maps (*.kmap)")));
}


QString GuiPreferences::browse(QString const & file,
	QString const & title) const
{
	return browseFile(file, title, QStringList(), true);
}


Dialog * createGuiPreferences(GuiView & lv) { return new GuiPreferences(lv); }


} // namespace frontend
} // namespace lyx

#include "moc_GuiPrefs.cpp"