/***************************************************************************
 *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

#include "renamedialog.h"

#include <kfileitem.h>
#include <klineedit.h>
#include <klocale.h>

#include <QtGui/QLabel>
#include <QtGui/QBoxLayout>

RenameDialog::RenameDialog(QWidget *parent, const KFileItemList& items) :
    KDialog(parent),
    m_renameOneItem(false)
{
    const QSize minSize = minimumSize();
    setMinimumSize(QSize(320, minSize.height()));

    const int itemCount = items.count();
    Q_ASSERT(itemCount >= 1);
    m_renameOneItem = (itemCount == 1);

    setCaption(m_renameOneItem ?
               i18nc("@title:window", "Rename Item") :
               i18nc("@title:window", "Rename Items"));
    setButtons(Ok | Cancel);
    setDefaultButton(Ok);

    setButtonGuiItem(Ok, KGuiItem(i18nc("@action:button", "Rename"), "dialog-ok-apply"));

    QWidget* page = new QWidget(this);
    setMainWidget(page);

    QVBoxLayout* topLayout = new QVBoxLayout(page);
    topLayout->setMargin(KDialog::marginHint());

    QLabel* editLabel = 0;
    if (m_renameOneItem) {
        m_newName = items.first().name();
        editLabel = new QLabel(i18nc("@label:textbox", "Rename the item <filename>%1</filename> to:", m_newName),
                               page);
    } else {
        m_newName = i18nc("@info:status", "New name #");
        editLabel = new QLabel(i18ncp("@label:textbox",
                                      "Rename the %1 selected item to:",
                                      "Rename the %1 selected items to:", itemCount),
                               page);
    }

    m_lineEdit = new KLineEdit(page);
    QString extension = extensionString(items[0].url().prettyUrl());
    if (extension.length() > 0) {
        // The first item seems to have a extension (e. g. '.jpg' or '.txt'). Now
        // check whether all other URLs have the same extension. If this is the
        // case, add this extension to the name suggestion.
        for (int i = 1; i < itemCount; ++i) {
            if (!items[i].url().prettyUrl().contains(extension)) {
                // at least one item does not have the same extension
                extension.truncate(0);
                break;
            }
        }
    }

    int selectionLength = m_newName.length();
    if (!m_renameOneItem) {
        --selectionLength; // don't select the # character
    }

    const int extensionLength = extension.length();
    if (extensionLength > 0) {
        if (m_renameOneItem) {
            selectionLength -= extensionLength;
        } else {
            m_newName.append(extension);
        }
    }

    m_lineEdit->setText(m_newName);
    m_lineEdit->setSelection(0, selectionLength);
    m_lineEdit->setFocus();

    topLayout->addWidget(editLabel);
    topLayout->addWidget(m_lineEdit);

    if (!m_renameOneItem) {
        QLabel* infoLabel = new QLabel(i18nc("@info", "(# will be replaced by ascending numbers)"), page);
        topLayout->addWidget(infoLabel);
    }
}

RenameDialog::~RenameDialog()
{}

void RenameDialog::slotButtonClicked(int button)
{
    if (button == Ok) {
        m_newName = m_lineEdit->text();
        if (m_newName.isEmpty()) {
            m_errorString = i18nc("@info:status",
                                  "The new name is empty. A name with at least one character must be entered.");
        } else if (!m_renameOneItem && (m_newName.count('#') == 0)) {
            m_newName.truncate(0);
            m_errorString = i18nc("@info:status", "The name must contain at least one # character.");
        }
    }

    KDialog::slotButtonClicked(button);
}

QString RenameDialog::extensionString(const QString& name)
{
    QString extension;

    const QStringList strings = name.split('.');
    const int size = strings.size();
    for (int i = size - 1; i >= 0; --i) {
        const QString& str = strings.at(i);

        // Sub strings like "9", "12", "99", ... which contain only
        // numbers don't count as extension. Usually they are version
        // numbers like in "cmake-2.4.5".
        bool isNumeric = false;
        str.toInt(&isNumeric);
        if (isNumeric) {
            break;
        }

        // Extensions may not contain a space and the maximum length
        // should not exceed 4 characters. This prevents that strings like
        // "Open office.org writer documentation.pdf" get ".org writer documentation.pdf"
        // as extension.
        if (str.contains(' ') || (str.length() > 4)) {
            break;
        }

        extension.insert(0, '.' + str);
    }

    return extension;
}

#include "renamedialog.moc"