fakevimplugin.cpp 24.9 KB
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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "fakevimplugin.h"

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#include "fakevimhandler.h"
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#include "ui_fakevimoptions.h"

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#include <coreplugin/actionmanager/actionmanager.h>
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#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/editormanager.h>
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#include <coreplugin/filemanager.h>
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#include <coreplugin/icore.h>
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#include <coreplugin/ifile.h>
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#include <coreplugin/dialogs/ioptionspage.h>
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#include <coreplugin/messagemanager.h>
#include <coreplugin/modemanager.h>
#include <coreplugin/uniqueidmanager.h>

#include <projectexplorer/projectexplorerconstants.h>
#include <projectexplorer/session.h>

#include <texteditor/basetexteditor.h>
#include <texteditor/basetextmark.h>
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#include <texteditor/completionsupport.h>
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#include <texteditor/itexteditor.h>
#include <texteditor/texteditorconstants.h>
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#include <texteditor/tabsettings.h>
#include <texteditor/texteditorsettings.h>
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#include <texteditor/textblockiterator.h>
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#include <find/findplugin.h>
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#include <find/textfindconstants.h>

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#include <utils/qtcassert.h>
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#include <utils/savedaction.h>
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#include <indenter.h>

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#include <QtCore/QDebug>
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#include <QtCore/QtPlugin>
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#include <QtCore/QObject>
#include <QtCore/QPoint>
#include <QtCore/QSettings>
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#include <QtCore/QTextStream>
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#include <QtGui/QMessageBox>
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#include <QtGui/QPlainTextEdit>
#include <QtGui/QTextBlock>
#include <QtGui/QTextCursor>
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#include <QtGui/QTextEdit>
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using namespace FakeVim::Internal;
using namespace TextEditor;
using namespace Core;
using namespace ProjectExplorer;


namespace FakeVim {
namespace Constants {

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const char * const INSTALL_HANDLER        = "TextEditor.FakeVimHandler";
const char * const MINI_BUFFER            = "TextEditor.FakeVimMiniBuffer";
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const char * const INSTALL_KEY            = "Alt+V,Alt+V";
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const char * const SETTINGS_CATEGORY      = "D.FakeVim";
const char * const SETTINGS_ID            = "General";
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} // namespace Constants
} // namespace FakeVim


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///////////////////////////////////////////////////////////////////////
//
// FakeVimOptionPage
//
///////////////////////////////////////////////////////////////////////

namespace FakeVim {
namespace Internal {

class FakeVimOptionPage : public Core::IOptionsPage
{
    Q_OBJECT

public:
    FakeVimOptionPage() {}

    // IOptionsPage
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    QString id() const { return QLatin1String(Constants::SETTINGS_ID); }
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    QString displayName() const { return tr("General"); }
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    QString category() const { return QLatin1String(Constants::SETTINGS_CATEGORY); }
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    QString displayCategory() const { return tr("FakeVim"); }
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    QWidget *createPage(QWidget *parent);
    void apply() { m_group.apply(ICore::instance()->settings()); }
    void finish() { m_group.finish(); }
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    virtual bool matches(const QString &) const;
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private slots:
    void copyTextEditorSettings();
    void setQtStyle();
    void setPlainStyle();

private:
    friend class DebuggerPlugin;
    Ui::FakeVimOptionPage m_ui;
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    QString m_searchKeywords;
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    Utils::SavedActionSet m_group;
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};

QWidget *FakeVimOptionPage::createPage(QWidget *parent)
{
    QWidget *w = new QWidget(parent);
    m_ui.setupUi(w);

    m_group.clear();
    m_group.insert(theFakeVimSetting(ConfigUseFakeVim), 
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        m_ui.groupBox);
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    m_group.insert(theFakeVimSetting(ConfigExpandTab), 
        m_ui.checkBoxExpandTab);
    m_group.insert(theFakeVimSetting(ConfigHlSearch), 
        m_ui.checkBoxHlSearch);
    m_group.insert(theFakeVimSetting(ConfigShiftWidth), 
        m_ui.lineEditShiftWidth);

    m_group.insert(theFakeVimSetting(ConfigSmartTab), 
        m_ui.checkBoxSmartTab);
    m_group.insert(theFakeVimSetting(ConfigStartOfLine), 
        m_ui.checkBoxStartOfLine);
    m_group.insert(theFakeVimSetting(ConfigTabStop), 
        m_ui.lineEditTabStop);
    m_group.insert(theFakeVimSetting(ConfigBackspace), 
        m_ui.lineEditBackspace);

    m_group.insert(theFakeVimSetting(ConfigAutoIndent), 
        m_ui.checkBoxAutoIndent);
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    m_group.insert(theFakeVimSetting(ConfigSmartIndent), 
        m_ui.checkBoxSmartIndent);
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    m_group.insert(theFakeVimSetting(ConfigIncSearch), 
        m_ui.checkBoxIncSearch);
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    connect(m_ui.pushButtonCopyTextEditorSettings, SIGNAL(clicked()),
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        this, SLOT(copyTextEditorSettings()));
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    connect(m_ui.pushButtonSetQtStyle, SIGNAL(clicked()),
        this, SLOT(setQtStyle()));
    connect(m_ui.pushButtonSetPlainStyle, SIGNAL(clicked()),
        this, SLOT(setPlainStyle()));
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    if (m_searchKeywords.isEmpty()) {
        QTextStream(&m_searchKeywords)
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            << ' ' << m_ui.labelAutoIndent->text()
            << ' ' << m_ui.labelExpandTab->text()
            << ' ' << m_ui.labelSmartIndent->text()
            << ' ' << m_ui.labelExpandTab->text()
            << ' ' << m_ui.labelHlSearch->text()
            << ' ' << m_ui.labelIncSearch->text()
            << ' ' << m_ui.labelShiftWidth->text()
            << ' ' << m_ui.labelSmartTab->text()
            << ' ' << m_ui.labelStartOfLine->text()
            << ' ' << m_ui.tabulatorLabel->text()
            << ' ' << m_ui.labelBackspace->text();
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        m_searchKeywords.remove(QLatin1Char('&'));
    }
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    return w;
}

void FakeVimOptionPage::copyTextEditorSettings()
{
    TextEditor::TabSettings ts = 
        TextEditor::TextEditorSettings::instance()->tabSettings();
    
    m_ui.checkBoxExpandTab->setChecked(ts.m_spacesForTabs);
    m_ui.lineEditTabStop->setText(QString::number(ts.m_tabSize));
    m_ui.lineEditShiftWidth->setText(QString::number(ts.m_indentSize));
    m_ui.checkBoxSmartTab->setChecked(ts.m_smartBackspace);
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    m_ui.checkBoxAutoIndent->setChecked(true);
    m_ui.checkBoxSmartIndent->setChecked(ts.m_autoIndent);
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    // FIXME: Not present in core
    //m_ui.checkBoxIncSearch->setChecked(ts.m_incSearch);
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}

void FakeVimOptionPage::setQtStyle()
{
    m_ui.checkBoxExpandTab->setChecked(true);
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    const QString four = QString(QLatin1Char('4'));
    m_ui.lineEditTabStop->setText(four);
    m_ui.lineEditShiftWidth->setText(four);
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    m_ui.checkBoxSmartTab->setChecked(true);
    m_ui.checkBoxAutoIndent->setChecked(true);
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    m_ui.checkBoxSmartIndent->setChecked(true);
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    m_ui.checkBoxIncSearch->setChecked(true);
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    m_ui.lineEditBackspace->setText(QLatin1String("indent,eol,start"));
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}

void FakeVimOptionPage::setPlainStyle()
{
    m_ui.checkBoxExpandTab->setChecked(false);
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    const QString eight = QString(QLatin1Char('4'));
    m_ui.lineEditTabStop->setText(eight);
    m_ui.lineEditShiftWidth->setText(eight);
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    m_ui.checkBoxSmartTab->setChecked(false);
    m_ui.checkBoxAutoIndent->setChecked(false);
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    m_ui.checkBoxSmartIndent->setChecked(false);
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    m_ui.checkBoxIncSearch->setChecked(false);
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    m_ui.lineEditBackspace->setText(QString());
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}

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bool FakeVimOptionPage::matches(const QString &s) const
{
    return m_searchKeywords.contains(s, Qt::CaseInsensitive);
}

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} // namespace Internal
} // namespace FakeVim


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///////////////////////////////////////////////////////////////////////
//
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// FakeVimPluginPrivate
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//
///////////////////////////////////////////////////////////////////////

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namespace FakeVim {
namespace Internal {

class FakeVimPluginPrivate : public QObject
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{
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    Q_OBJECT

public:
    FakeVimPluginPrivate(FakeVimPlugin *);
    ~FakeVimPluginPrivate();
    friend class FakeVimPlugin;

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    bool initialize();
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    void shutdown();

private slots:
    void editorOpened(Core::IEditor *);
    void editorAboutToClose(Core::IEditor *);
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    void setUseFakeVim(const QVariant &value);
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    void quitFakeVim();
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    void triggerCompletions();
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    void windowCommand(int key);
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    void find(bool reverse);
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    void findNext(bool reverse);
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    void showSettingsDialog();
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    void showCommandBuffer(const QString &contents);
    void showExtraInformation(const QString &msg);
    void changeSelection(const QList<QTextEdit::ExtraSelection> &selections);
    void writeFile(bool *handled, const QString &fileName, const QString &contents);
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    void moveToMatchingParenthesis(bool *moved, bool *forward, QTextCursor *cursor);
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    void checkForElectricCharacter(bool *result, QChar c);
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    void indentRegion(int *amount, int beginLine, int endLine,  QChar typedChar);
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    void handleExCommand(const QString &cmd);

    void handleDelayedQuitAll(bool forced);
    void handleDelayedQuit(bool forced, Core::IEditor *editor);

signals:
    void delayedQuitRequested(bool forced, Core::IEditor *editor);
    void delayedQuitAllRequested(bool forced);
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private:
    FakeVimPlugin *q;
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    FakeVimOptionPage *m_fakeVimOptionsPage;
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    QHash<Core::IEditor *, FakeVimHandler *> m_editorToHandler;
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    void triggerAction(const QString& code);
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};

} // namespace Internal
} // namespace FakeVim

FakeVimPluginPrivate::FakeVimPluginPrivate(FakeVimPlugin *plugin)
{       
    q = plugin;
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    m_fakeVimOptionsPage = 0;
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}

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FakeVimPluginPrivate::~FakeVimPluginPrivate()
{
}
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void FakeVimPluginPrivate::shutdown()
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{
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    q->removeObject(m_fakeVimOptionsPage);
    delete m_fakeVimOptionsPage;
    m_fakeVimOptionsPage = 0;
    theFakeVimSettings()->writeSettings(Core::ICore::instance()->settings());
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    delete theFakeVimSettings();
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}

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bool FakeVimPluginPrivate::initialize()
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{
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    Core::ActionManager *actionManager = Core::ICore::instance()->actionManager();
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    QTC_ASSERT(actionManager, return false);

    QList<int> globalcontext;
    globalcontext << Core::Constants::C_GLOBAL_ID;

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    m_fakeVimOptionsPage = new FakeVimOptionPage;
    q->addObject(m_fakeVimOptionsPage);
    theFakeVimSettings()->readSettings(Core::ICore::instance()->settings());
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    Core::Command *cmd = 0;
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    cmd = actionManager->registerAction(theFakeVimSetting(ConfigUseFakeVim),
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        Constants::INSTALL_HANDLER, globalcontext);
    cmd->setDefaultKeySequence(QKeySequence(Constants::INSTALL_KEY));

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    ActionContainer *advancedMenu =
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        actionManager->actionContainer(Core::Constants::M_EDIT_ADVANCED);
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    advancedMenu->addAction(cmd, Core::Constants::G_EDIT_EDITOR);
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    // EditorManager
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    QObject *editorManager = Core::ICore::instance()->editorManager();
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    connect(editorManager, SIGNAL(editorAboutToClose(Core::IEditor*)),
        this, SLOT(editorAboutToClose(Core::IEditor*)));
    connect(editorManager, SIGNAL(editorOpened(Core::IEditor*)),
        this, SLOT(editorOpened(Core::IEditor*)));

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    connect(theFakeVimSetting(SettingsDialog), SIGNAL(triggered()),
        this, SLOT(showSettingsDialog()));
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    connect(theFakeVimSetting(ConfigUseFakeVim), SIGNAL(valueChanged(QVariant)),
        this, SLOT(setUseFakeVim(QVariant)));
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    // Delayed operatiosn
    connect(this, SIGNAL(delayedQuitRequested(bool,Core::IEditor*)),
        this, SLOT(handleDelayedQuit(bool,Core::IEditor*)), Qt::QueuedConnection);
    connect(this, SIGNAL(delayedQuitAllRequested(bool)),
        this, SLOT(handleDelayedQuitAll(bool)), Qt::QueuedConnection);

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    return true;
}

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void FakeVimPluginPrivate::showSettingsDialog()
{
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    Core::ICore::instance()->showOptionsDialog(QLatin1String(Constants::SETTINGS_CATEGORY),
                                               QLatin1String(Constants::SETTINGS_ID));
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}

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void FakeVimPluginPrivate::triggerAction(const QString& code)
{
    Core::ActionManager *am = Core::ICore::instance()->actionManager();
    QTC_ASSERT(am, return);
    Core::Command *cmd = am->command(code);
    QTC_ASSERT(cmd, return);
    QAction *action = cmd->action();
    QTC_ASSERT(action, return);
    action->trigger();
}

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void FakeVimPluginPrivate::windowCommand(int key)
{
    #define control(n) (256 + n)
    QString code;
    switch (key) {
        case 'c': case 'C': case control('c'):
            code = Core::Constants::CLOSE;
            break;
        case 'n': case 'N': case control('n'):
            code = Core::Constants::GOTONEXT;
            break;
        case 'o': case 'O': case control('o'):
            code = Core::Constants::REMOVE_ALL_SPLITS;
            code = Core::Constants::REMOVE_CURRENT_SPLIT;
            break;
        case 'p': case 'P': case control('p'):
            code = Core::Constants::GOTOPREV;
            break;
        case 's': case 'S': case control('s'):
            code = Core::Constants::SPLIT;
            break;
        case 'w': case 'W': case control('w'):
            code = Core::Constants::GOTO_OTHER_SPLIT;
            break;
    }
    #undef control
    qDebug() << "RUNNING WINDOW COMMAND: " << key << code;
    if (code.isEmpty()) {
        qDebug() << "UNKNOWN WINDOWS COMMAND: " << key;
        return;
    }
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    triggerAction(code);
}

void FakeVimPluginPrivate::find(bool reverse)
{
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    if (Find::Internal::FindPlugin *plugin = Find::Internal::FindPlugin::instance()) {
        plugin->setUseFakeVim(true);
        plugin->openFindToolBar(reverse
                ? Find::Internal::FindPlugin::FindBackward
                : Find::Internal::FindPlugin::FindForward);
    }
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}

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void FakeVimPluginPrivate::findNext(bool reverse)
{
    if (reverse)
        triggerAction(Find::Constants::FIND_PREVIOUS);
    else
        triggerAction(Find::Constants::FIND_NEXT);
}

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void FakeVimPluginPrivate::editorOpened(Core::IEditor *editor)
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{
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    if (!editor)
        return;

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    QWidget *widget = editor->widget();
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    if (!widget)
        return;
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    // we can only handle QTextEdit and QPlainTextEdit
    if (!qobject_cast<QTextEdit *>(widget) && !qobject_cast<QPlainTextEdit *>(widget))
        return;
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    //qDebug() << "OPENING: " << editor << editor->widget()
    //    << "MODE: " << theFakeVimSetting(ConfigUseFakeVim)->value();

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    FakeVimHandler *handler = new FakeVimHandler(widget, widget);
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    m_editorToHandler[editor] = handler;
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    connect(handler, SIGNAL(extraInformationChanged(QString)),
        this, SLOT(showExtraInformation(QString)));
    connect(handler, SIGNAL(commandBufferChanged(QString)),
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        this, SLOT(showCommandBuffer(QString)));
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    connect(handler, SIGNAL(writeFileRequested(bool*,QString,QString)),
        this, SLOT(writeFile(bool*,QString,QString)));
    connect(handler, SIGNAL(selectionChanged(QList<QTextEdit::ExtraSelection>)),
        this, SLOT(changeSelection(QList<QTextEdit::ExtraSelection>)));
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    connect(handler, SIGNAL(moveToMatchingParenthesis(bool*,bool*,QTextCursor*)),
        this, SLOT(moveToMatchingParenthesis(bool*,bool*,QTextCursor*)));
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    connect(handler, SIGNAL(indentRegion(int*,int,int,QChar)),
        this, SLOT(indentRegion(int*,int,int,QChar)));
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    connect(handler, SIGNAL(checkForElectricCharacter(bool*,QChar)),
        this, SLOT(checkForElectricCharacter(bool*,QChar)));
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    connect(handler, SIGNAL(completionRequested()),
        this, SLOT(triggerCompletions()));
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    connect(handler, SIGNAL(windowCommandRequested(int)),
        this, SLOT(windowCommand(int)));
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    connect(handler, SIGNAL(findRequested(bool)),
        this, SLOT(find(bool)));
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    connect(handler, SIGNAL(findNextRequested(bool)),
        this, SLOT(findNext(bool)));
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    connect(handler, SIGNAL(handleExCommandRequested(QString)),
        this, SLOT(handleExCommand(QString)));

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    handler->setCurrentFileName(editor->file()->fileName());
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    handler->installEventFilter();
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    // pop up the bar
    if (theFakeVimSetting(ConfigUseFakeVim)->value().toBool())
       showCommandBuffer("");
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}

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void FakeVimPluginPrivate::editorAboutToClose(Core::IEditor *editor)
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{
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    //qDebug() << "CLOSING: " << editor << editor->widget();
    m_editorToHandler.remove(editor);
}

void FakeVimPluginPrivate::setUseFakeVim(const QVariant &value)
{
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    //qDebug() << "SET USE FAKEVIM" << value;
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    bool on = value.toBool();
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    if (Find::Internal::FindPlugin::instance())
        Find::Internal::FindPlugin::instance()->setUseFakeVim(on);
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    if (on) {
        Core::EditorManager::instance()->showEditorStatusBar( 
            QLatin1String(Constants::MINI_BUFFER), 
            "vi emulation mode. Type :q to leave. Use , Ctrl-R to trigger run.",
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            tr("Quit FakeVim"), this, SLOT(quitFakeVim()));
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        foreach (Core::IEditor *editor, m_editorToHandler.keys())
            m_editorToHandler[editor]->setupWidget();
    } else {
        Core::EditorManager::instance()->hideEditorStatusBar(
            QLatin1String(Constants::MINI_BUFFER));
        foreach (Core::IEditor *editor, m_editorToHandler.keys())
            m_editorToHandler[editor]->restoreWidget();
    }
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}

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void FakeVimPluginPrivate::triggerCompletions()
{
    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;
    if (BaseTextEditor *bt = qobject_cast<BaseTextEditor *>(handler->widget()))
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        TextEditor::Internal::CompletionSupport::instance()->
            autoComplete(bt->editableInterface(), false);
   //     bt->triggerCompletions();
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}

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void FakeVimPluginPrivate::checkForElectricCharacter(bool *result, QChar c)
{
    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;
    if (BaseTextEditor *bt = qobject_cast<BaseTextEditor *>(handler->widget()))
        *result = bt->isElectricCharacter(c);
}

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void FakeVimPluginPrivate::writeFile(bool *handled,
    const QString &fileName, const QString &contents)
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{
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    Q_UNUSED(contents)
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    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;

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    Core::IEditor *editor = m_editorToHandler.key(handler);
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    if (editor && editor->file()->fileName() == fileName) {
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        // Handle that as a special case for nicer interaction with core
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        Core::IFile *file = editor->file();
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        Core::ICore::instance()->fileManager()->blockFileChange(file);
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        file->save(fileName);
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        Core::ICore::instance()->fileManager()->unblockFileChange(file);
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        *handled = true;
    } 
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}

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void FakeVimPluginPrivate::handleExCommand(const QString &cmd)
{
    static QRegExp reNextFile("^n(ext)?!?( (.*))?$");
    static QRegExp rePreviousFile("^(N(ext)?|prev(ious)?)!?( (.*))?$");
    static QRegExp reWriteAll("^wa(ll)?!?$");
    static QRegExp reQuit("^q!?$");
    static QRegExp reQuitAll("^qa!?$");

    using namespace Core;

    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;

    EditorManager *editorManager = EditorManager::instance();
    QTC_ASSERT(editorManager, return);

    if (reNextFile.indexIn(cmd) != -1) {
        // :n
        editorManager->goForwardInNavigationHistory();
    } else if (rePreviousFile.indexIn(cmd) != -1) {
        // :N, :prev
        editorManager->goBackInNavigationHistory();
    } else if (reWriteAll.indexIn(cmd) != -1) {
        // :wa
        FileManager *fm = ICore::instance()->fileManager();
        QList<IFile *> toSave = fm->modifiedFiles();
        QList<IFile *> failed = fm->saveModifiedFilesSilently(toSave);
        if (failed.isEmpty())
            handler->showBlackMessage(tr("Saving succeeded"));
        else
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            handler->showRedMessage(tr("%n files not saved", 0, failed.size()));
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    } else if (reQuit.indexIn(cmd) != -1) {
        // :q
        bool forced = cmd.contains(QChar('!'));
        emit delayedQuitRequested(forced, m_editorToHandler.key(handler));
    } else if (reQuitAll.indexIn(cmd) != -1) {
        // :qa
        bool forced = cmd.contains(QChar('!'));
        emit delayedQuitAllRequested(forced);
    } else {
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        handler->showRedMessage(tr("Not an editor command: %1").arg(cmd));
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    }
}

void FakeVimPluginPrivate::handleDelayedQuit(bool forced, Core::IEditor *editor)
{
    QList<Core::IEditor *> editors;
    editors.append(editor);
    Core::EditorManager::instance()->closeEditors(editors, !forced);
}

void FakeVimPluginPrivate::handleDelayedQuitAll(bool forced)
{
    Core::EditorManager::instance()->closeAllEditors(!forced);
}

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void FakeVimPluginPrivate::moveToMatchingParenthesis(bool *moved, bool *forward,
        QTextCursor *cursor)
{
    *moved = false;

    bool undoFakeEOL = false;
    if (cursor->atBlockEnd() && cursor->block().length() > 1) {
        cursor->movePosition(QTextCursor::Left, QTextCursor::KeepAnchor, 1);
        undoFakeEOL = true;
    }
    TextEditor::TextBlockUserData::MatchType match
        = TextEditor::TextBlockUserData::matchCursorForward(cursor);
    if (match == TextEditor::TextBlockUserData::Match) {
        *moved = true;
        *forward = true;
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    } else {
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        if (undoFakeEOL)
            cursor->movePosition(QTextCursor::Right, QTextCursor::KeepAnchor, 1);
        if (match == TextEditor::TextBlockUserData::NoMatch) {
            // backward matching is according to the character before the cursor
            bool undoMove = false;
            if (!cursor->atBlockEnd()) {
                cursor->movePosition(QTextCursor::Right, QTextCursor::KeepAnchor, 1);
                undoMove = true;
            }
            match = TextEditor::TextBlockUserData::matchCursorBackward(cursor);
            if (match == TextEditor::TextBlockUserData::Match) {
                *moved = true;
                *forward = false;
            } else if (undoMove) {
                cursor->movePosition(QTextCursor::Left, QTextCursor::KeepAnchor, 1);
            }
        }
    }
}

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void FakeVimPluginPrivate::indentRegion(int *amount, int beginLine, int endLine,
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      QChar typedChar)
{
    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;

    BaseTextEditor *bt = qobject_cast<BaseTextEditor *>(handler->widget());
    if (!bt)
        return;

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    TextEditor::TabSettings tabSettings;
    tabSettings.m_indentSize = theFakeVimSetting(ConfigShiftWidth)->value().toInt();
    tabSettings.m_tabSize = theFakeVimSetting(ConfigTabStop)->value().toInt();
    tabSettings.m_spacesForTabs = theFakeVimSetting(ConfigExpandTab)->value().toBool();
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    typedef SharedTools::Indenter<TextEditor::TextBlockIterator> Indenter;
    Indenter &indenter = Indenter::instance();
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    indenter.setIndentSize(tabSettings.m_indentSize);
    indenter.setTabSize(tabSettings.m_tabSize);
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    const QTextDocument *doc = bt->document();
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    const TextEditor::TextBlockIterator docStart(doc->begin());
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    QTextBlock cur = doc->findBlockByNumber(beginLine);
    for(int i = beginLine; i<= endLine; ++i)
    {
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        if (typedChar == 0 && cur.text().simplified().isEmpty()) {
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            // clear empty lines
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            *amount = 0;
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            QTextCursor cursor(cur);
            while (!cursor.atBlockEnd())
                cursor.deleteChar();
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        } else {
            const TextEditor::TextBlockIterator current(cur);
            const TextEditor::TextBlockIterator next(cur.next());
            *amount = indenter.indentForBottomLine(current, docStart, next, typedChar);
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            tabSettings.indentLine(cur, *amount);
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        }
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        cur = cur.next();
    }
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}

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void FakeVimPluginPrivate::quitFakeVim()
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{
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    theFakeVimSetting(ConfigUseFakeVim)->setValue(false);
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}

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void FakeVimPluginPrivate::showCommandBuffer(const QString &contents)
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{
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    //qDebug() << "SHOW COMMAND BUFFER" << contents;
    Core::EditorManager::instance()->showEditorStatusBar( 
        QLatin1String(Constants::MINI_BUFFER), contents,
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        tr("Quit FakeVim"), this, SLOT(quitFakeVim()));
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}

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void FakeVimPluginPrivate::showExtraInformation(const QString &text)
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{
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    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (handler)
        QMessageBox::information(handler->widget(), tr("FakeVim Information"), text);
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}

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void FakeVimPluginPrivate::changeSelection
    (const QList<QTextEdit::ExtraSelection> &selection)
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{
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    if (FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender()))
        if (BaseTextEditor *bt = qobject_cast<BaseTextEditor *>(handler->widget()))
            bt->setExtraSelections(BaseTextEditor::FakeVimSelection, selection);
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}

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///////////////////////////////////////////////////////////////////////
//
// FakeVimPlugin
//
///////////////////////////////////////////////////////////////////////

FakeVimPlugin::FakeVimPlugin()
    : d(new FakeVimPluginPrivate(this))
{}

FakeVimPlugin::~FakeVimPlugin()
{
    delete d;
}

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bool FakeVimPlugin::initialize(const QStringList &arguments, QString *errorMessage)
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{
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    Q_UNUSED(arguments)
    Q_UNUSED(errorMessage)
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    return d->initialize();
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}

void FakeVimPlugin::shutdown()
{
    d->shutdown();
}

void FakeVimPlugin::extensionsInitialized()
{
}

#include "fakevimplugin.moc"
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Q_EXPORT_PLUGIN(FakeVimPlugin)