//=============================================================================
//  MusE Score
//  Linux Music Score Editor
//
//  Copyright (C) 2002-2010 Werner Schweer and others
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================

#include "log.h"

#include "texttools.h"
#include "icons.h"
#include "libmscore/text.h"
#include "musescore.h"
#include "libmscore/score.h"
#include "textpalette.h"
#include "libmscore/mscore.h"
#include "preferences.h"
#include "scoreview.h"

namespace Ms {
TextPalette* textPalette;

//---------------------------------------------------------
//   textTools
//---------------------------------------------------------

TextTools* MuseScore::textTools()
{
    if (!_textTools) {
        _textTools = new TextTools(this);
        addDockWidget(Qt::DockWidgetArea(Qt::BottomDockWidgetArea), _textTools);
    }
    setFocusPolicy(Qt::NoFocus);
    return _textTools;
}

//---------------------------------------------------------
//   TextTools
//---------------------------------------------------------

TextTools::TextTools(QWidget* parent)
    : QDockWidget(parent)
{
    setObjectName("text-tools");
    setWindowTitle(tr("Text Tools"));
    setAllowedAreas(Qt::DockWidgetAreas(Qt::TopDockWidgetArea | Qt::BottomDockWidgetArea));
    setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);

    text = nullptr;
    cursor = nullptr;

    QToolBar* tb = new QToolBar(tr("Text Edit"));
    tb->setIconSize(QSize(preferences.getInt(PREF_UI_THEME_ICONWIDTH) * guiScaling,
                          preferences.getInt(PREF_UI_THEME_ICONHEIGHT) * guiScaling));

    showKeyboard = getAction("show-keys");
    showKeyboard->setCheckable(true);
    tb->addAction(showKeyboard);

    typefaceBold = tb->addAction(*icons[int(Icons::textBold_ICON)], "");
    typefaceBold->setToolTip(tr("Bold"));
    typefaceBold->setCheckable(true);

    typefaceItalic = tb->addAction(*icons[int(Icons::textItalic_ICON)], "");
    typefaceItalic->setToolTip(tr("Italic"));
    typefaceItalic->setCheckable(true);

    typefaceUnderline = tb->addAction(*icons[int(Icons::textUnderline_ICON)], "");
    typefaceUnderline->setToolTip(tr("Underline"));
    typefaceUnderline->setCheckable(true);

    tb->addSeparator();

    typefaceSubscript   = tb->addAction(*icons[int(Icons::textSub_ICON)], "");
    typefaceSubscript->setToolTip(tr("Subscript"));
    typefaceSubscript->setCheckable(true);

    typefaceSuperscript = tb->addAction(*icons[int(Icons::textSuper_ICON)], "");
    typefaceSuperscript->setToolTip(tr("Superscript"));
    typefaceSuperscript->setCheckable(true);

    tb->addSeparator();

    typefaceFamily = new QFontComboBox(this);
    typefaceFamily->setEditable(false);
    tb->addWidget(typefaceFamily);

    typefaceSize = new QDoubleSpinBox(this);
    typefaceSize->setFocusPolicy(Qt::ClickFocus);
    typefaceSize->setMinimum(1);
    tb->addWidget(typefaceSize);

    setWidget(tb);
    QWidget* w = new QWidget(this);
    setTitleBarWidget(w);
    titleBarWidget()->hide();

    connect(typefaceSize,        SIGNAL(valueChanged(double)), SLOT(sizeChanged(double)));
    connect(typefaceFamily,      SIGNAL(currentFontChanged(const QFont&)), SLOT(fontChanged(const QFont&)));
    connect(typefaceBold,        SIGNAL(triggered(bool)), SLOT(boldClicked(bool)));
    connect(typefaceItalic,      SIGNAL(triggered(bool)), SLOT(italicClicked(bool)));
    connect(typefaceUnderline,   SIGNAL(triggered(bool)), SLOT(underlineClicked(bool)));
    connect(typefaceSubscript,   SIGNAL(triggered(bool)), SLOT(subscriptClicked(bool)));
    connect(typefaceSuperscript, SIGNAL(triggered(bool)), SLOT(superscriptClicked(bool)));
    connect(showKeyboard,        SIGNAL(toggled(bool)),   SLOT(showKeyboardClicked(bool)));
}

//---------------------------------------------------------
//   blockAllSignals
//---------------------------------------------------------

void TextTools::blockAllSignals(bool val)
{
    typefaceSize->blockSignals(val);
    typefaceFamily->blockSignals(val);
    typefaceBold->blockSignals(val);
    typefaceItalic->blockSignals(val);
    typefaceUnderline->blockSignals(val);
    typefaceSubscript->blockSignals(val);
    typefaceSuperscript->blockSignals(val);
    typefaceFamily->blockSignals(val);
    showKeyboard->blockSignals(val);
}

//---------------------------------------------------------
//   updateTools
//---------------------------------------------------------

void TextTools::updateTools(EditData& ed)
{
    text   = toTextBase(ed.element);
    IF_ASSERT_FAILED(text) {
        return;
    }

    cursor = text->cursor(ed);
    IF_ASSERT_FAILED(cursor) {
        return;
    }

    blockAllSignals(true);
    CharFormat* format = cursor->format();

    QFont f(format->fontFamily());
    typefaceFamily->setCurrentFont(f);
    typefaceFamily->setEnabled(true);
    typefaceSize->setValue(format->fontSize());

    typefaceItalic->setChecked(format->italic());
    typefaceBold->setChecked(format->bold());
    typefaceUnderline->setChecked(format->underline());
    typefaceSubscript->setChecked(format->valign() == VerticalAlignment::AlignSubScript);
    typefaceSuperscript->setChecked(format->valign() == VerticalAlignment::AlignSuperScript);

    blockAllSignals(false);
}

//---------------------------------------------------------
//   updateText
//---------------------------------------------------------

void TextTools::updateText()
{
    if (!text) {
        return;
    }
    layoutText();
}

//---------------------------------------------------------
//   layoutText
//---------------------------------------------------------

void TextTools::layoutText()
{
    text->triggerLayout();
    text->score()->update();
}

//---------------------------------------------------------
//   sizeChanged
//---------------------------------------------------------

void TextTools::sizeChanged(double value)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::FontSize, value);
    cursor->format()->setFontSize(value);
    updateText();
}

//---------------------------------------------------------
//   fontChanged
//---------------------------------------------------------

void TextTools::fontChanged(const QFont& f)
{
    //! REVIEW An explanation is needed why only in this one method
    //! it is assumed that the cursor may not be,
    //! and that this is a normal situation, and not an exception (no assertion)
    if (cursor) {
        cursor->setFormat(FormatId::FontFamily, f.family());
    }
    if (textPalette) {
        textPalette->setFont(f.family());
    }
    updateText();
}

//---------------------------------------------------------
//   boldClicked
//---------------------------------------------------------

void TextTools::boldClicked(bool val)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::Bold, val);
    updateText();
}

//---------------------------------------------------------
//   toggleBold
//---------------------------------------------------------

void TextTools::toggleBold()
{
    typefaceBold->toggle();
    boldClicked(typefaceBold->isChecked());
}

//---------------------------------------------------------
//   toggleItalic
//---------------------------------------------------------

void TextTools::toggleItalic()
{
    typefaceItalic->toggle();
    italicClicked(typefaceItalic->isChecked());
}

//---------------------------------------------------------
//   toggleUnderline
//---------------------------------------------------------

void TextTools::toggleUnderline()
{
    typefaceUnderline->toggle();
    underlineClicked(typefaceUnderline->isChecked());
}

//---------------------------------------------------------
//   underlineClicked
//---------------------------------------------------------

void TextTools::underlineClicked(bool val)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::Underline, val);
    updateText();
}

//---------------------------------------------------------
//   italicClicked
//---------------------------------------------------------

void TextTools::italicClicked(bool val)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::Italic, val);
    updateText();
}

//---------------------------------------------------------
//   subscriptClicked
//---------------------------------------------------------

void TextTools::subscriptClicked(bool val)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::Valign, int(val ? VerticalAlignment::AlignSubScript : VerticalAlignment::AlignNormal));
    typefaceSuperscript->blockSignals(true);
    typefaceSuperscript->setChecked(false);
    typefaceSuperscript->blockSignals(false);
    updateText();
}

//---------------------------------------------------------
//   superscriptClicked
//---------------------------------------------------------

void TextTools::superscriptClicked(bool val)
{
    IF_ASSERT_FAILED(cursor) {
        return;
    }
    cursor->setFormat(FormatId::Valign,
                      int(val ? VerticalAlignment::AlignSuperScript : VerticalAlignment::AlignNormal));
    typefaceSubscript->blockSignals(true);
    typefaceSubscript->setChecked(false);
    typefaceSubscript->blockSignals(false);
    updateText();
}

//---------------------------------------------------------
//   showKeyboardClicked
//---------------------------------------------------------

void TextTools::showKeyboardClicked(bool val)
{
    if (val) {
        IF_ASSERT_FAILED(cursor) {
            return;
        }
        if (textPalette == 0) {
            textPalette = new TextPalette(mscore);
        }
        textPalette->setText(text);
        textPalette->setFont(cursor->format()->fontFamily());
        textPalette->show();
    } else {
        if (textPalette) {
            textPalette->hide();
        }
    }
}
}