/************************************************************************
**
**  Copyright (C) 2019-2021 Kevin B. Hendricks, Stratford, Ontario, Canada
**  Copyright (C) 2012      John Schember <john@nachtimwald.com>
**  Copyright (C) 2012      Dave Heiland
**  Copyright (C) 2012      Grant Drake
**
**  This file is part of Sigil.
**
**  Sigil 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 3 of the License, or
**  (at your option) any later version.
**
**  Sigil 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 Sigil.  If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/

#include <QtCore/QSignalMapper>
#include <QAction>
#include <QtGui/QContextMenuEvent>
#include <QtWidgets/QFileDialog>
#include <QtWidgets/QMenu>
#include <QtWidgets/QMessageBox>
#include <QtWidgets/QPushButton>
#include <QRegularExpression>

#include "BookManipulation/FolderKeeper.h"
#include "Dialogs/ClipEditor.h"
#include "Parsers/CSSInfo.h"
#include "Misc/Utility.h"
#include "ResourceObjects/CSSResource.h"

static const QString SETTINGS_GROUP = "clips";
static const QString FILE_EXTENSION = "ini";

ClipEditor::ClipEditor(QWidget *parent)
    :
    QDialog(parent),
    m_Book(NULL),
    m_LastFolderOpen(QString()),
    m_ContextMenu(new QMenu(this))
{
    ui.setupUi(this);
    ui.FilterText->installEventFilter(this);
    ui.PasteClip->setDefault(true);
    SetupClipEditorTree();
    CreateContextMenuActions();
    ConnectSignalsSlots();
    ExpandAll();
}

void ClipEditor::SetBook(QSharedPointer <Book> book)
{
    m_Book = book;
}

void ClipEditor::SetupClipEditorTree()
{
    m_ClipEditorModel = ClipEditorModel::instance();
    ui.ClipEditorTree->setModel(m_ClipEditorModel);
    ui.ClipEditorTree->setContextMenuPolicy(Qt::CustomContextMenu);
    ui.ClipEditorTree->setSortingEnabled(false);
    ui.ClipEditorTree->setWordWrap(true);
    ui.ClipEditorTree->setAlternatingRowColors(true);
    ui.ClipEditorTree->header()->setToolTip(
        "<p>" + tr("Right click on an entry to see a context menu of actions.") + "</p>" +
        "<p>" + tr("You can also right click in your document to select an entry.") + "</p>" +
        "<dl>" +
        "<dt><b>" + tr("Name") + "</b><dd>" + tr("Name of your entry or group.") + "</dd>" +
        "<dt><b>" + tr("Text") + "</b><dd>" + tr("The text to insert. The text is treated like a Regex replacement expression so \\1 can be used to insert the text selected in Code View when you paste the clip.") + "</dd>" +
        "</dl>");
    ui.buttonBox->setToolTip(QString() +
                             "<dl>" +
                             "<dt><b>" + tr("Save") + "</b><dd>" + tr("Save your changes.") + "<br/><br/>" + tr("If any other instances of Sigil are running they will be automatically updated with your changes.") + "</dd>" +
                             "</dl>");
    ui.ClipEditorTree->header()->setStretchLastSection(true);
}

bool ClipEditor::SaveData(QList<ClipEditorModel::clipEntry *> entries, QString filename)
{
    QString message = m_ClipEditorModel->SaveData(entries, filename);

    if (!message.isEmpty()) {
        Utility::DisplayStdErrorDialog(tr("Cannot save entries.") + "\n\n" + message);
    }

    return message.isEmpty();
}

void ClipEditor::PasteIntoDocument()
{
    // GetSelectedEntries creates each clipEntry with new
    // and so they will need to be deleted to prevent memory leaks
    emit PasteSelectedClipRequest(GetSelectedEntries());
}

void ClipEditor::showEvent(QShowEvent *event)
{
    ReadSettings();
    ui.FilterText->setFocus();

    for (int column = 0; column < ui.ClipEditorTree->header()->count() - 1; column++) {
        ui.ClipEditorTree->resizeColumnToContents(column);
    }
}

bool ClipEditor::eventFilter(QObject *obj, QEvent *event)
{
    if (obj == ui.FilterText) {
        if (event->type() == QEvent::KeyPress) {
            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
            int key = keyEvent->key();

            if (key == Qt::Key_Down) {
                ui.ClipEditorTree->setFocus();
                return true;
            }
        }
    }

    // pass the event on to the parent class
    return QDialog::eventFilter(obj, event);
}

void ClipEditor::SettingsFileModelUpdated()
{
    ui.ClipEditorTree->expandAll();
    emit ShowStatusMessageRequest(tr("Clip entries loaded from file."));
    emit ClipsUpdated();
}

void ClipEditor::ModelItemDropped(const QModelIndex &index)
{
    if (index.isValid()) {
        ui.ClipEditorTree->expand(index);
    }
}

int ClipEditor::SelectedRowsCount()
{
    int count = 0;

    if (ui.ClipEditorTree->selectionModel()->hasSelection()) {
        count = ui.ClipEditorTree->selectionModel()->selectedRows(0).count();
    }

    return count;
}


// Note this routine invokes ClipEditorModel GetEntries or GetEntry
// which creates the clipEntry structs using new so we will need
// to clean up after we are done to prevent memory leaks
QList<ClipEditorModel::clipEntry *> ClipEditor::GetSelectedEntries()
{
    QList<ClipEditorModel::clipEntry *> selected_entries;

    if (ui.ClipEditorTree->selectionModel()->hasSelection()) {
        QList<QStandardItem *> items = m_ClipEditorModel->GetNonGroupItems(GetSelectedItems());

        if (!ItemsAreUnique(items)) {
            return selected_entries;
        }

        selected_entries = m_ClipEditorModel->GetEntries(items);
    }

    return selected_entries;
}

QList<QStandardItem *> ClipEditor::GetSelectedItems()
{
    // Shift-click order is top to bottom regardless of starting position
    // Ctrl-click order is first clicked to last clicked (included shift-clicks stay ordered as is)
    QModelIndexList selected_indexes = ui.ClipEditorTree->selectionModel()->selectedRows(0);
    QList<QStandardItem *> selected_items;
    foreach(QModelIndex index, selected_indexes) {
        selected_items.append(m_ClipEditorModel->itemFromIndex(index));
    }
    return selected_items;
}

bool ClipEditor::ItemsAreUnique(QList<QStandardItem *> items)
{
    // Although saving a group and a sub item works, it could be confusing to users to
    // have and entry appear twice so its more predictable just to prevent it and warn the user
    QList<QStandardItem *> nodupitems = items;
    std::sort(nodupitems.begin(), nodupitems.end());
    nodupitems.erase(std::unique(nodupitems.begin(), nodupitems.end()), nodupitems.end());
    if (nodupitems.count() != items.count()) {
        Utility::DisplayStdErrorDialog(tr("You cannot select an entry and a group containing the entry."));
        return false;
    }

    return true;
}

QStandardItem *ClipEditor::AddEntry(bool is_group, ClipEditorModel::clipEntry *clip_entry, bool insert_after)
{
    QStandardItem *parent_item = NULL;
    QStandardItem *new_item = NULL;
    int row = 0;

    // If adding a new/blank entry add it after the selected entry.
    if (insert_after) {
        if (ui.ClipEditorTree->selectionModel()->hasSelection()) {
            parent_item = GetSelectedItems().last();

            if (!parent_item) {
                return parent_item;
            }

            if (!m_ClipEditorModel->ItemIsGroup(parent_item)) {
                row = parent_item->row() + 1;
                parent_item = parent_item->parent();
            }
        }
    }

    // Make sure the new entry can be seen
    if (parent_item) {
        ui.ClipEditorTree->expand(parent_item->index());
    }

    new_item = m_ClipEditorModel->AddEntryToModel(clip_entry, is_group, parent_item, row);
    QModelIndex new_index = new_item->index();
    // Select the added item and set it for editing
    ui.ClipEditorTree->selectionModel()->clear();
    ui.ClipEditorTree->setCurrentIndex(new_index);
    ui.ClipEditorTree->selectionModel()->select(new_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
    ui.ClipEditorTree->edit(new_index);
    ui.ClipEditorTree->selectionModel()->select(new_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
    return new_item;
}

QStandardItem *ClipEditor::AddGroup()
{
    return AddEntry(true);
}

void ClipEditor::Edit()
{
    ui.ClipEditorTree->edit(ui.ClipEditorTree->currentIndex());
}

void ClipEditor::Cut()
{
    if (Copy()) {
        Delete();
    }
}

bool ClipEditor::Copy()
{
    if (SelectedRowsCount() < 1) {
        return false;
    }

    while (m_SavedClipEntries.count()) {
        // these were previously generated with new
        ClipEditorModel::clipEntry * p = m_SavedClipEntries.at(0);
        delete p;
        m_SavedClipEntries.removeAt(0);
    }

    // we will need to clean up the entries below to prevent memory leaks
    QList<ClipEditorModel::clipEntry *> entries = GetSelectedEntries();
   

    if (!entries.count()) {
        return false;
    }

    foreach(QStandardItem * item, GetSelectedItems()) {
        ClipEditorModel::clipEntry *entry = m_ClipEditorModel->GetEntry(item);

        if (entry->is_group) {
            Utility::DisplayStdErrorDialog(tr("You cannot Copy or Cut groups - use drag-and-drop.")) ;
            delete entry;
            return false;
        }
        delete entry;
    }
    foreach(ClipEditorModel::clipEntry * entry, entries) {
        // need to clean up m_SavedClipEntries when done to prevent memory leak
        ClipEditorModel::clipEntry *save_entry = new ClipEditorModel::clipEntry();
        save_entry->name = entry->name;
        save_entry->is_group = entry->is_group;
        save_entry->text = entry->text;
        m_SavedClipEntries.append(save_entry);
    }
    // to prevent memory leaks
    qDeleteAll(entries);
    entries.clear();
    return true;
}

void ClipEditor::Paste()
{
    foreach(ClipEditorModel::clipEntry * entry, m_SavedClipEntries) {
        AddEntry(entry->is_group, entry);
    }
}

void ClipEditor::Delete()
{
    if (SelectedRowsCount() < 1) {
        return;
    }

    // Delete one at a time as selection may not be contiguous
    int row = -1;
    QModelIndex parent_index;

    while (ui.ClipEditorTree->selectionModel()->hasSelection()) {
        QModelIndex index = ui.ClipEditorTree->selectionModel()->selectedRows(0).first();

        if (index.isValid()) {
            row = index.row();
            parent_index = index.parent();
            m_ClipEditorModel->removeRows(row, 1, parent_index);
        }
    }

    // Select the nearest row in the group if there is one
    int parent_row_count;

    if (parent_index.isValid()) {
        parent_row_count = m_ClipEditorModel->itemFromIndex(parent_index)->rowCount();
    } else {
        parent_row_count = m_ClipEditorModel->invisibleRootItem()->rowCount();
    }

    if (parent_row_count && row >= 0) {
        if (row >= parent_row_count) {
            row = parent_row_count - 1;
        }

        if (row >= 0) {
            QModelIndex select_index = m_ClipEditorModel->index(row, 0, parent_index);
            ui.ClipEditorTree->setCurrentIndex(select_index);
            ui.ClipEditorTree->selectionModel()->select(select_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
        }
    }
}

void ClipEditor::Reload()
{
    QMessageBox::StandardButton button_pressed;
    button_pressed = Utility::warning(this, tr("Sigil"), tr("Are you sure you want to reload all entries?  This will overwrite any unsaved changes."), QMessageBox::Ok | QMessageBox::Cancel);

    if (button_pressed == QMessageBox::Ok) {
        m_ClipEditorModel->LoadInitialData();
    }
}

void ClipEditor::Import()
{
    if (SelectedRowsCount() > 1) {
        return;
    }

    // Get the filename to import from
    QString filter_string = "*." % FILE_EXTENSION;
    QFileDialog::Options options = QFileDialog::Options();
#ifdef Q_OS_MAC
    options = options | QFileDialog::DontUseNativeDialog;
#endif

    QString filename = QFileDialog::getOpenFileName(this,
                       tr("Import Entries"),
                       m_LastFolderOpen,
                       filter_string,
                       NULL,
                       options);

    // Load the file and save the last folder opened
    if (!filename.isEmpty()) {
        // Create a new group for the imported items after the selected item
        // Avoids merging with existing groups, etc.
        QStandardItem *item = AddGroup();

        if (item) {
            m_ClipEditorModel->Rename(item, "Imported");
            m_ClipEditorModel->LoadData(filename, item);
            m_LastFolderOpen = QFileInfo(filename).absolutePath();
            WriteSettings();
        }
    }
}

void ClipEditor::ExportAll()
{
    QList<QStandardItem *> items;
    QStandardItem *item = m_ClipEditorModel->invisibleRootItem();
    QModelIndex parent_index;

    for (int row = 0; row < item->rowCount(); row++) {
        items.append(item->child(row, 0));
    }

    ExportItems(items);
}

void ClipEditor::Export()
{
    if (SelectedRowsCount() < 1) {
        return;
    }

    QList<QStandardItem *> items = GetSelectedItems();

    if (!ItemsAreUnique(m_ClipEditorModel->GetNonParentItems(items))) {
        return;
    }

    ExportItems(items);
}

void ClipEditor::ExportItems(QList<QStandardItem *> items)
{
    QList<ClipEditorModel::clipEntry *> entries;
    foreach(QStandardItem * item, items) {
        // Get all subitems of an item not just the item itself
        QList<QStandardItem *> sub_items = m_ClipEditorModel->GetNonParentItems(item);
        // Get the parent path of the item
        QString parent_path = "";

        if (item->parent()) {
            parent_path = m_ClipEditorModel->GetFullName(item->parent());
        }

        // Note GetEntry creates the clipEntry with new and it is just a struct
        foreach(QStandardItem * item, sub_items) {
            ClipEditorModel::clipEntry *entry = m_ClipEditorModel->GetEntry(item);
            // Remove the top level paths since we're exporting a subset
            entry->fullname.replace(QRegularExpression(parent_path), "");
            entry->name = entry->fullname;
            entries.append(entry);
        }
    }
    // Get the filename to use
    QString filter_string = "*." % FILE_EXTENSION;
    QString default_filter = "*";
    QFileDialog::Options options = QFileDialog::Options();
#ifdef Q_OS_MAC
    options = options | QFileDialog::DontUseNativeDialog;
#endif

    QString filename = QFileDialog::getSaveFileName(this,
                       tr("Export Selected Entries"),
                       m_LastFolderOpen,
                       filter_string,
                       &default_filter,
                       options);

    if (filename.isEmpty()) {
        return;
    }

    QString extension = QFileInfo(filename).suffix().toLower();

    if (extension != FILE_EXTENSION) {
        filename += "." % FILE_EXTENSION;
    }

    // Save the data, and last folder opened if successful
    if (SaveData(entries, filename)) {
        m_LastFolderOpen = QFileInfo(filename).absolutePath();
        WriteSettings();
    }
    // need to delete the entries to prevent a leak
    qDeleteAll(entries);
    entries.clear();
}

void ClipEditor::CollapseAll()
{
    ui.ClipEditorTree->collapseAll();
}

void ClipEditor::ExpandAll()
{
    ui.ClipEditorTree->expandAll();
}

void ClipEditor::AutoFill()
{
    if (SelectedRowsCount() > 1) {
        return;
    }

    QStringList css_list;

    QList<CSSResource *> css_resources = m_Book->GetFolderKeeper()->GetResourceTypeList<CSSResource>(false);

    foreach(CSSResource * css_resource, css_resources) {
        CSSInfo css_info(css_resource->GetText());
        QList<CSSInfo::CSSSelector *> selectors = css_info.getClassSelectors();
        foreach(CSSInfo::CSSSelector *selector, selectors) {
            QString text = selector->text;
            if (!text.contains(".")) {
                continue;
            }
            if (text.startsWith(".")) {
                css_list.append("p" % text);
                css_list.append("span" % text);
                css_list.append("div" % text);
            } else {
                css_list.append(text);
            }
        }
    }

    ClipEditorModel::clipEntry *entry = new ClipEditorModel::clipEntry();
    entry->name = "Autofill";
    entry->is_group = true;
    QStandardItem *group_item = m_ClipEditorModel->AddEntryToModel(entry, true);

    foreach(QString group, css_list) {
        QStringList values = group.split(".");
        QString element = values[0];
        QString class_name = values[1];

        ClipEditorModel::clipEntry *entry = new ClipEditorModel::clipEntry();
        entry->name = group;
        entry->is_group = false;
        entry->text = "<" + element + " class=\"" + class_name + "\">" + "\\1" + "</" + element + ">";
        m_ClipEditorModel->AddEntryToModel(entry, false, group_item);
    }

    QMessageBox::information(this, tr("Clip Editor"), tr("CSS entries added: %n", "",css_list.count()));
}


bool ClipEditor::FilterEntries(const QString &text, QStandardItem *item)
{
    const QString lowercaseText = text.toLower();
    bool hidden = false;
    QModelIndex parent_index;

    if (item && item->parent()) {
        parent_index = item->parent()->index();
    }

    if (item) {
        // Hide the entry if it doesn't contain the entered text, otherwise show it
        ClipEditorModel::clipEntry *entry = m_ClipEditorModel->GetEntry(item);

        if (ui.Filter->currentIndex() == 0) {
            hidden = !(text.isEmpty() || entry->name.toLower().contains(lowercaseText));
        } else {
            hidden = !(text.isEmpty() || entry->name.toLower().contains(lowercaseText) ||
                       entry->text.toLower().contains(lowercaseText));
        }

        ui.ClipEditorTree->setRowHidden(item->row(), parent_index, hidden);
    } else {
        item = m_ClipEditorModel->invisibleRootItem();
    }

    // Recursively set children
    // Show group if any children are visible, but do not hide in case other children are visible
    for (int row = 0; row < item->rowCount(); row++) {
        if (!FilterEntries(text, item->child(row, 0))) {
            hidden = false;
            ui.ClipEditorTree->setRowHidden(item->row(), parent_index, hidden);
        }
    }

    return hidden;
}

void ClipEditor::FilterEditTextChangedSlot(const QString &text)
{
    FilterEntries(text);
    ui.ClipEditorTree->expandAll();
    ui.ClipEditorTree->selectionModel()->clear();

    if (!text.isEmpty()) {
        SelectFirstVisibleNonGroup(m_ClipEditorModel->invisibleRootItem());
    }

    return;
}

bool ClipEditor::SelectFirstVisibleNonGroup(QStandardItem *item)
{
    QModelIndex parent_index;

    if (item->parent()) {
        parent_index = item->parent()->index();
    }

    // If the item is not a group and its visible select it and finish
    if (item != m_ClipEditorModel->invisibleRootItem() && !ui.ClipEditorTree->isRowHidden(item->row(), parent_index)) {
        if (!m_ClipEditorModel->ItemIsGroup(item)) {
            ui.ClipEditorTree->selectionModel()->select(m_ClipEditorModel->index(item->row(), 0, parent_index), QItemSelectionModel::Select | QItemSelectionModel::Rows);
            ui.ClipEditorTree->setCurrentIndex(item->index());
            return true;
        }
    }

    // Recursively check children of any groups
    for (int row = 0; row < item->rowCount(); row++) {
        if (SelectFirstVisibleNonGroup(item->child(row, 0))) {
            return true;
        }
    }

    return false;
}

void ClipEditor::ReadSettings()
{
    SettingsStore settings;
    settings.beginGroup(SETTINGS_GROUP);
    // The size of the window and it's full screen status
    QByteArray geometry = settings.value("geometry").toByteArray();

    if (!geometry.isNull()) {
        restoreGeometry(geometry);
    }

    // Last folder open
    m_LastFolderOpen = settings.value("last_folder_open").toString();
    settings.endGroup();
}

void ClipEditor::WriteSettings()
{
    SettingsStore settings;
    settings.beginGroup(SETTINGS_GROUP);
    // The size of the window and it's full screen status
    settings.setValue("geometry", saveGeometry());
    // Last folder open
    settings.setValue("last_folder_open", m_LastFolderOpen);
    settings.endGroup();
}

void ClipEditor::CreateContextMenuActions()
{
    m_AddEntry  =   new QAction(tr("Add Entry"),          this);
    m_AddGroup  =   new QAction(tr("Add Group"),          this);
    m_Edit      =   new QAction(tr("Edit"),               this);
    m_Cut       =   new QAction(tr("Cut"),                this);
    m_Copy      =   new QAction(tr("Copy"),               this);
    m_Paste     =   new QAction(tr("Paste"),              this);
    m_Delete    =   new QAction(tr("Delete"),             this);
    m_Import    =   new QAction(tr("Import") + "...",      this);
    m_Reload    =   new QAction(tr("Reload") + "...",     this);
    m_Export    =   new QAction(tr("Export") + "...",     this);
    m_ExportAll =   new QAction(tr("Export All") + "...", this);
    m_CollapseAll = new QAction(tr("Collapse All"),       this);
    m_ExpandAll =   new QAction(tr("Expand All"),         this);
    m_AutoFill  =   new QAction(tr("Autofill"),           this);
    m_AddEntry->setShortcut(QKeySequence(Qt::ControlModifier | Qt::Key_E));
    m_AddGroup->setShortcut(QKeySequence(Qt::ControlModifier | Qt::Key_G));
    m_Edit->setShortcut(QKeySequence(Qt::Key_F2));
    m_Cut->setShortcut(QKeySequence(Qt::ControlModifier | Qt::Key_X));
    m_Copy->setShortcut(QKeySequence(Qt::ControlModifier | Qt::Key_C));
    m_Paste->setShortcut(QKeySequence(Qt::ControlModifier | Qt::Key_V));
    m_Delete->setShortcut(QKeySequence::Delete);
    // Has to be added to the dialog itself for the keyboard shortcut to work.
    addAction(m_AddEntry);
    addAction(m_AddGroup);
    addAction(m_Edit);
    addAction(m_Cut);
    addAction(m_Copy);
    addAction(m_Paste);
    addAction(m_Delete);
}

void ClipEditor::OpenContextMenu(const QPoint &point)
{
    SetupContextMenu(point);
    m_ContextMenu->exec(ui.ClipEditorTree->viewport()->mapToGlobal(point));
    if (!m_ContextMenu.isNull()) {
        m_ContextMenu->clear();
        // Make sure every action is enabled - in case shortcut is used after context menu disables some.
        m_AddEntry->setEnabled(true);
        m_AddGroup->setEnabled(true);
        m_Edit->setEnabled(true);
        m_Cut->setEnabled(true);
        m_Copy->setEnabled(true);
        m_Paste->setEnabled(true);
        m_Delete->setEnabled(true);
        m_Import->setEnabled(true);
        m_Reload->setEnabled(true);
        m_Export->setEnabled(true);
        m_ExportAll->setEnabled(true);
        m_CollapseAll->setEnabled(true);
        m_ExpandAll->setEnabled(true);
        m_AutoFill->setEnabled(true);
    }
}

void ClipEditor::SetupContextMenu(const QPoint &point)
{
    int selected_rows_count = SelectedRowsCount();
    m_ContextMenu->addAction(m_AddEntry);
    m_ContextMenu->addAction(m_AddGroup);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_Edit);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_Cut);
    m_Cut->setEnabled(selected_rows_count > 0);
    m_ContextMenu->addAction(m_Copy);
    m_Copy->setEnabled(selected_rows_count > 0);
    m_ContextMenu->addAction(m_Paste);
    m_Paste->setEnabled(m_SavedClipEntries.count());
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_Delete);
    m_Delete->setEnabled(selected_rows_count > 0);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_Import);
    m_Import->setEnabled(selected_rows_count <= 1);
    m_ContextMenu->addAction(m_Reload);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_Export);
    m_Export->setEnabled(selected_rows_count > 0);
    m_ContextMenu->addAction(m_ExportAll);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_AutoFill);
    m_ContextMenu->addSeparator();
    m_ContextMenu->addAction(m_CollapseAll);
    m_ContextMenu->addAction(m_ExpandAll);
}

void ClipEditor::Apply()
{
    PasteIntoDocument();
}

bool ClipEditor::Save()
{
    if (SaveData()) {
        emit ShowStatusMessageRequest(tr("Clip entries saved."));
        return true;
    }

    return false;
}

void ClipEditor::reject()
{
    WriteSettings();

    if (MaybeSaveDialogSaysProceed(false)) {
        QDialog::reject();
    }
}

void ClipEditor::ForceClose()
{
    MaybeSaveDialogSaysProceed(true);
    close();
}

bool ClipEditor::MaybeSaveDialogSaysProceed(bool is_forced)
{
    if (m_ClipEditorModel->IsDataModified()) {
        QMessageBox::StandardButton button_pressed;
        QMessageBox::StandardButtons buttons = is_forced ? QMessageBox::Save | QMessageBox::Discard
                                               : QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel;
        button_pressed = Utility::warning(this,
                                              tr("Sigil: Clip Editor"),
                                              tr("The Clip entries may have been modified.\n"
                                                      "Do you want to save your changes?"),
                                              buttons
                                             );

        if (button_pressed == QMessageBox::Save) {
            return Save();
        } else if (button_pressed == QMessageBox::Cancel) {
            return false;
        } else {
            m_ClipEditorModel->LoadInitialData();
        }
    }

    return true;
}

void ClipEditor::MoveUp()
{
    MoveVertical(false);
}

void ClipEditor::MoveDown()
{
    MoveVertical(true);
}

void ClipEditor::MoveVertical(bool move_down)
{
    if (!ui.ClipEditorTree->selectionModel()->hasSelection()) {
        return;
    }

    QModelIndexList selected_indexes = ui.ClipEditorTree->selectionModel()->selectedRows(0);

    if (selected_indexes.count() > 1) {
        return;
    }

    // Identify the selected item
    QModelIndex index = selected_indexes.first();
    int row = index.row();
    QStandardItem *item = m_ClipEditorModel->itemFromIndex(index);
    QStandardItem *source_parent_item = item->parent();

    if (!source_parent_item) {
        source_parent_item = m_ClipEditorModel->invisibleRootItem();
    }

    QStandardItem *destination_parent_item = source_parent_item;
    int destination_row;

    if (move_down) {
        if (row >= source_parent_item->rowCount() - 1) {
            // We are the last child for this group.
            if (source_parent_item == m_ClipEditorModel->invisibleRootItem()) {
                // Can't go any lower than this
                return;
            }

            // Make this the next child of the parent, as though the user hit Left
            destination_parent_item = source_parent_item->parent();

            if (!destination_parent_item) {
                destination_parent_item = m_ClipEditorModel->invisibleRootItem();
            }

            destination_row = source_parent_item->index().row() + 1;
        } else {
            destination_row = row + 1;
        }
    } else {
        if (row == 0) {
            // We are the first child for this parent.
            if (source_parent_item == m_ClipEditorModel->invisibleRootItem()) {
                // Can't go any higher than this
                return;
            }

            // Make this the previous child of the parent, as though the user hit Left and Up
            destination_parent_item = source_parent_item->parent();

            if (!destination_parent_item) {
                destination_parent_item = m_ClipEditorModel->invisibleRootItem();
            }

            destination_row = source_parent_item->index().row();
        } else {
            destination_row = row - 1;
        }
    }

    // Swap the item rows
    QList<QStandardItem *> row_items = source_parent_item->takeRow(row);
    destination_parent_item->insertRow(destination_row, row_items);
    // Get index
    QModelIndex destination_index = destination_parent_item->child(destination_row, 0)->index();
    // Make sure the path to the item is updated
    QStandardItem *destination_item = m_ClipEditorModel->itemFromIndex(destination_index);
    m_ClipEditorModel->UpdateFullName(destination_item);
    // Select the item row again
    ui.ClipEditorTree->selectionModel()->clear();
    ui.ClipEditorTree->setCurrentIndex(destination_index);
    ui.ClipEditorTree->selectionModel()->select(destination_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
    ui.ClipEditorTree->expand(destination_parent_item->index());
}

void ClipEditor::MoveLeft()
{
    MoveHorizontal(true);
}

void ClipEditor::MoveRight()
{
    MoveHorizontal(false);
}

void ClipEditor::MoveHorizontal(bool move_left)
{
    if (!ui.ClipEditorTree->selectionModel()->hasSelection()) {
        return;
    }

    QModelIndexList selected_indexes = ui.ClipEditorTree->selectionModel()->selectedRows(0);

    if (selected_indexes.count() > 1) {
        return;
    }

    // Identify the source information
    QModelIndex source_index = selected_indexes.first();
    int source_row = source_index.row();
    QStandardItem *source_item = m_ClipEditorModel->itemFromIndex(source_index);
    QStandardItem *source_parent_item = source_item->parent();

    if (!source_parent_item) {
        source_parent_item = m_ClipEditorModel->invisibleRootItem();
    }

    QStandardItem *destination_parent_item;
    int destination_row = 0;

    if (move_left) {
        // Skip if at root or otherwise at top level
        if (!source_parent_item || source_parent_item == m_ClipEditorModel->invisibleRootItem()) {
            return;
        }

        // Move below parent
        destination_parent_item = source_parent_item->parent();

        if (!destination_parent_item) {
            destination_parent_item = m_ClipEditorModel->invisibleRootItem();
        }

        destination_row = source_parent_item->index().row() + 1;
    } else {
        QModelIndex index_above = ui.ClipEditorTree->indexAbove(source_index);

        if (!index_above.isValid()) {
            return;
        }

        QStandardItem *item = m_ClipEditorModel->itemFromIndex(index_above);

        if (source_parent_item == item) {
            return;
        }

        ClipEditorModel::clipEntry *entry = m_ClipEditorModel->GetEntry(item);

        // Only move right if immediately under a group
        if (entry ->is_group) {
            destination_parent_item = item;
        } else {
            // Or if the item above is in a different group
            if (item->parent() && item->parent() != source_parent_item) {
                destination_parent_item = item->parent();
            } else {
                return;
            }
        }

        destination_row = destination_parent_item->rowCount();
    }

    // Swap the item rows
    QList<QStandardItem *> row_items = source_parent_item->takeRow(source_row);
    destination_parent_item->insertRow(destination_row, row_items);
    QModelIndex destination_index = destination_parent_item->child(destination_row)->index();
    // Make sure the path to the item is updated
    QStandardItem *destination_item = m_ClipEditorModel->itemFromIndex(destination_index);
    m_ClipEditorModel->UpdateFullName(destination_item);
    // Select the item row again
    ui.ClipEditorTree->selectionModel()->clear();
    ui.ClipEditorTree->setCurrentIndex(destination_index);
    ui.ClipEditorTree->selectionModel()->select(destination_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
}


void ClipEditor::ConnectSignalsSlots()
{
    connect(ui.FilterText,          SIGNAL(textChanged(QString)), this, SLOT(FilterEditTextChangedSlot(QString)));
    connect(ui.PasteClip,  SIGNAL(clicked()),            this, SLOT(PasteIntoDocument()));
    connect(ui.AddEntry,   SIGNAL(clicked()),            this, SLOT(AddEntry()));
    connect(ui.AddGroup,   SIGNAL(clicked()),            this, SLOT(AddGroup()));
    connect(ui.MoveUp,     SIGNAL(clicked()),            this, SLOT(MoveUp()));
    connect(ui.MoveDown,   SIGNAL(clicked()),            this, SLOT(MoveDown()));
    connect(ui.MoveLeft,   SIGNAL(clicked()),            this, SLOT(MoveLeft()));
    connect(ui.MoveRight,  SIGNAL(clicked()),            this, SLOT(MoveRight()));
    connect(ui.buttonBox->button(QDialogButtonBox::Save), SIGNAL(clicked()), this, SLOT(Save()));
    connect(ui.buttonBox->button(QDialogButtonBox::Close), SIGNAL(clicked()), this, SLOT(reject()));
    connect(ui.ClipEditorTree, SIGNAL(customContextMenuRequested(const QPoint &)),
            this,                   SLOT(OpenContextMenu(const QPoint &)));
    connect(m_AddEntry,    SIGNAL(triggered()), this, SLOT(AddEntry()));
    connect(m_AddGroup,    SIGNAL(triggered()), this, SLOT(AddGroup()));
    connect(m_Edit,        SIGNAL(triggered()), this, SLOT(Edit()));
    connect(m_Cut,         SIGNAL(triggered()), this, SLOT(Cut()));
    connect(m_Copy,        SIGNAL(triggered()), this, SLOT(Copy()));
    connect(m_Paste,       SIGNAL(triggered()), this, SLOT(Paste()));
    connect(m_Delete,      SIGNAL(triggered()), this, SLOT(Delete()));
    connect(m_Import,      SIGNAL(triggered()), this, SLOT(Import()));
    connect(m_Reload,      SIGNAL(triggered()), this, SLOT(Reload()));
    connect(m_Export,      SIGNAL(triggered()), this, SLOT(Export()));
    connect(m_ExportAll,   SIGNAL(triggered()), this, SLOT(ExportAll()));
    connect(m_CollapseAll, SIGNAL(triggered()), this, SLOT(CollapseAll()));
    connect(m_ExpandAll,   SIGNAL(triggered()), this, SLOT(ExpandAll()));
    connect(m_AutoFill,    SIGNAL(triggered()), this, SLOT(AutoFill()));
    connect(m_ClipEditorModel, SIGNAL(SettingsFileUpdated()), this, SLOT(SettingsFileModelUpdated()));
    connect(m_ClipEditorModel, SIGNAL(ItemDropped(const QModelIndex &)), this, SLOT(ModelItemDropped(const QModelIndex &)));
    connect(m_ClipEditorModel, SIGNAL(ClipsUpdated()), this, SIGNAL(ClipsUpdated()));
}
