/* This file is part of the KDE libraries
   Copyright (C) 2009-2010 Bernhard Beschow <bbeschow@cs.tu-berlin.de>
   Copyright (C) 2007 Sebastian Pipping <webmaster@hartwork.org>
   Copyright (C) 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
   Copyright (C) 2007 Thomas Friedrichsmeier <thomas.friedrichsmeier@ruhr-uni-bochum.de>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License version 2 as published by the Free Software Foundation.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include "katesearchbar.h"

#include "kateregexp.h"
#include "katematch.h"
#include "kateview.h"
#include "katedocument.h"
#include "kateundomanager.h"
#include "kateconfig.h"
#include "katerenderer.h"

#include <KTextEditor/Message>
#include <KTextEditor/MovingCursor>
#include <KTextEditor/MovingRange>

#include "ui_searchbarincremental.h"
#include "ui_searchbarpower.h"

#include <KColorScheme>
#include <KMessageBox>
#include <KStandardAction>
#include <KLocalizedString>

#include <QVBoxLayout>
#include <QComboBox>
#include <QCheckBox>
#include <QShortcut>

// Turn debug messages on/off here
// #define FAST_DEBUG_ENABLE

#ifdef FAST_DEBUG_ENABLE
# define FAST_DEBUG(x) qCDebug(LOG_PART) << x
#else
# define FAST_DEBUG(x)
#endif

using namespace KTextEditor;

namespace
{

class AddMenuManager
{

private:
    QVector<QString> m_insertBefore;
    QVector<QString> m_insertAfter;
    QSet<QAction *> m_actionPointers;
    uint m_indexWalker;
    QMenu *m_menu;

public:
    AddMenuManager(QMenu *parent, int expectedItemCount)
        : m_insertBefore(QVector<QString>(expectedItemCount)),
          m_insertAfter(QVector<QString>(expectedItemCount)),
          m_indexWalker(0),
          m_menu(NULL)
    {
        Q_ASSERT(parent != NULL);
        m_menu = parent->addMenu(i18n("Add..."));
        if (m_menu == NULL) {
            return;
        }
        m_menu->setIcon(QIcon::fromTheme(QLatin1String("list-add")));
    }

    void enableMenu(bool enabled)
    {
        if (m_menu == NULL) {
            return;
        }
        m_menu->setEnabled(enabled);
    }

    void addEntry(const QString &before, const QString after,
                  const QString description, const QString &realBefore = QString(),
                  const QString &realAfter = QString())
    {
        if (m_menu == NULL) {
            return;
        }
        QAction *const action = m_menu->addAction(before + after + QLatin1Char('\t') + description);
        m_insertBefore[m_indexWalker] = QString(realBefore.isEmpty() ? before : realBefore);
        m_insertAfter[m_indexWalker] = QString(realAfter.isEmpty() ? after : realAfter);
        action->setData(QVariant(m_indexWalker++));
        m_actionPointers.insert(action);
    }

    void addSeparator()
    {
        if (m_menu == NULL) {
            return;
        }
        m_menu->addSeparator();
    }

    void handle(QAction *action, QLineEdit *lineEdit)
    {
        if (!m_actionPointers.contains(action)) {
            return;
        }

        const int cursorPos = lineEdit->cursorPosition();
        const int index = action->data().toUInt();
        const QString &before = m_insertBefore[index];
        const QString &after = m_insertAfter[index];
        lineEdit->insert(before + after);
        lineEdit->setCursorPosition(cursorPos + before.count());
        lineEdit->setFocus();
    }
};

} // anon namespace

KateSearchBar::KateSearchBar(bool initAsPower, KTextEditor::ViewPrivate *view, KateViewConfig *config)
    : KateViewBarWidget(true, view),
      m_view(view),
      m_config(config),
      m_layout(new QVBoxLayout()),
      m_widget(NULL),
      m_incUi(NULL),
      m_incInitCursor(view->cursorPosition()),
      m_powerUi(NULL),
      highlightMatchAttribute(new Attribute()),
      highlightReplacementAttribute(new Attribute()),
      m_incHighlightAll(false),
      m_incFromCursor(true),
      m_incMatchCase(false),
      m_powerMatchCase(true),
      m_powerFromCursor(false),
      m_powerHighlightAll(false),
      m_powerMode(0)
{

    connect(view, SIGNAL(cursorPositionChanged(KTextEditor::View*,KTextEditor::Cursor)),
            this, SLOT(updateIncInitCursor()));

    // init match attribute
    Attribute::Ptr mouseInAttribute(new Attribute());
    mouseInAttribute->setFontBold(true);
    highlightMatchAttribute->setDynamicAttribute(Attribute::ActivateMouseIn, mouseInAttribute);

    Attribute::Ptr caretInAttribute(new Attribute());
    caretInAttribute->setFontItalic(true);
    highlightMatchAttribute->setDynamicAttribute(Attribute::ActivateCaretIn, caretInAttribute);

    updateHighlightColors();

    // Modify parent
    QWidget *const widget = centralWidget();
    widget->setLayout(m_layout);
    m_layout->setMargin(0);

    // allow to have small size, for e.g. Kile
    setMinimumWidth(100);

    // Copy global to local config backup
    const long searchFlags = m_config->searchFlags();
    m_incHighlightAll = (searchFlags & KateViewConfig::IncHighlightAll) != 0;
    m_incFromCursor = (searchFlags & KateViewConfig::IncFromCursor) != 0;
    m_incMatchCase = (searchFlags & KateViewConfig::IncMatchCase) != 0;
    m_powerMatchCase = (searchFlags & KateViewConfig::PowerMatchCase) != 0;
    m_powerFromCursor = (searchFlags & KateViewConfig::PowerFromCursor) != 0;
    m_powerHighlightAll = (searchFlags & KateViewConfig::PowerHighlightAll) != 0;
    m_powerMode = ((searchFlags & KateViewConfig::PowerModeRegularExpression) != 0)
                  ? MODE_REGEX
                  : (((searchFlags & KateViewConfig::PowerModeEscapeSequences) != 0)
                     ? MODE_ESCAPE_SEQUENCES
                     : (((searchFlags & KateViewConfig::PowerModeWholeWords) != 0)
                        ? MODE_WHOLE_WORDS
                        : MODE_PLAIN_TEXT));

    // Load one of either dialogs
    if (initAsPower) {
        enterPowerMode();
    } else {
        enterIncrementalMode();
    }

    updateSelectionOnly();
    connect(view, SIGNAL(selectionChanged(KTextEditor::View*)),
            this, SLOT(updateSelectionOnly()));
}

KateSearchBar::~KateSearchBar()
{
    clearHighlights();
    delete m_layout;
    delete m_widget;

    delete m_incUi;
    delete m_powerUi;
}

void KateSearchBar::closed()
{
    // remove search from the view bar, because it vertically bloats up the
    // stacked layout in KateViewBar.
    if (viewBar()) {
        viewBar()->removeBarWidget(this);
    }

    clearHighlights();
}

void KateSearchBar::setReplacementPattern(const QString &replacementPattern)
{
    Q_ASSERT(isPower());

    if (this->replacementPattern() == replacementPattern) {
        return;
    }

    m_powerUi->replacement->setEditText(replacementPattern);
}

QString KateSearchBar::replacementPattern() const
{
    Q_ASSERT(isPower());

    return m_powerUi->replacement->currentText();
}

void KateSearchBar::setSearchMode(KateSearchBar::SearchMode mode)
{
    Q_ASSERT(isPower());

    m_powerUi->searchMode->setCurrentIndex(mode);
}

void KateSearchBar::findNext()
{
    const bool found = find();

    if (found) {
        QComboBox *combo = m_powerUi != 0 ? m_powerUi->pattern : m_incUi->pattern;

        // Add to search history
        addCurrentTextToHistory(combo);
    }
}

void KateSearchBar::findPrevious()
{
    const bool found = find(SearchBackward);

    if (found) {
        QComboBox *combo = m_powerUi != 0 ? m_powerUi->pattern : m_incUi->pattern;

        // Add to search history
        addCurrentTextToHistory(combo);
    }
}

void KateSearchBar::showInfoMessage(const QString &text)
{
    delete m_infoMessage;

    m_infoMessage = new KTextEditor::Message(text, KTextEditor::Message::Positive);
    m_infoMessage->setPosition(KTextEditor::Message::BottomInView);
    m_infoMessage->setAutoHide(3000); // 3 seconds
    m_infoMessage->setView(m_view);

    m_view->doc()->postMessage(m_infoMessage);
}

void KateSearchBar::highlightMatch(const Range &range)
{
    KTextEditor::MovingRange *const highlight = m_view->doc()->newMovingRange(range, Kate::TextRange::DoNotExpand);
    highlight->setView(m_view); // show only in this view
    highlight->setAttributeOnlyForViews(true);
    // use z depth defined in moving ranges interface
    highlight->setZDepth(-10000.0);
    highlight->setAttribute(highlightMatchAttribute);
    m_hlRanges.append(highlight);
}

void KateSearchBar::highlightReplacement(const Range &range)
{
    KTextEditor::MovingRange *const highlight = m_view->doc()->newMovingRange(range, Kate::TextRange::DoNotExpand);
    highlight->setView(m_view); // show only in this view
    highlight->setAttributeOnlyForViews(true);
    // use z depth defined in moving ranges interface
    highlight->setZDepth(-10000.0);
    highlight->setAttribute(highlightReplacementAttribute);
    m_hlRanges.append(highlight);
}

void KateSearchBar::indicateMatch(MatchResult matchResult)
{
    QLineEdit *const lineEdit = isPower() ? m_powerUi->pattern->lineEdit()
                                : m_incUi->pattern->lineEdit();
    QPalette background(lineEdit->palette());

    switch (matchResult) {
    case MatchFound:  // FALLTHROUGH
    case MatchWrappedForward:
    case MatchWrappedBackward:
        // Green background for line edit
        KColorScheme::adjustBackground(background, KColorScheme::PositiveBackground);
        break;
    case MatchMismatch:
        // Red background for line edit
        KColorScheme::adjustBackground(background, KColorScheme::NegativeBackground);
        break;
    case MatchNothing:
        // Reset background of line edit
        background = QPalette();
        break;
    case MatchNeutral:
        KColorScheme::adjustBackground(background, KColorScheme::NeutralBackground);
        break;
    }

    // Update status label
    if (m_incUi != NULL) {
        QPalette foreground(m_incUi->status->palette());
        switch (matchResult) {
        case MatchFound: // FALLTHROUGH
        case MatchNothing:
            KColorScheme::adjustForeground(foreground, KColorScheme::NormalText, QPalette::WindowText, KColorScheme::Window);
            m_incUi->status->clear();
            break;
        case MatchWrappedForward:
        case MatchWrappedBackward:
            KColorScheme::adjustForeground(foreground, KColorScheme::NormalText, QPalette::WindowText, KColorScheme::Window);
            if (matchResult == MatchWrappedBackward) {
                m_incUi->status->setText(i18n("Reached top, continued from bottom"));
            } else {
                m_incUi->status->setText(i18n("Reached bottom, continued from top"));
            }
            break;
        case MatchMismatch:
            KColorScheme::adjustForeground(foreground, KColorScheme::NegativeText, QPalette::WindowText, KColorScheme::Window);
            m_incUi->status->setText(i18n("Not found"));
            break;
        case MatchNeutral:
            /* do nothing */
            break;
        }
        m_incUi->status->setPalette(foreground);
    }

    lineEdit->setPalette(background);
}

/*static*/ void KateSearchBar::selectRange(KTextEditor::ViewPrivate *view, const KTextEditor::Range &range)
{
    view->setCursorPositionInternal(range.end());
    view->setSelection(range);
}

void KateSearchBar::selectRange2(const KTextEditor::Range &range)
{
    disconnect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));
    selectRange(m_view, range);
    connect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));
}

void KateSearchBar::onIncPatternChanged(const QString &pattern)
{
    if (!m_incUi) {
        return;
    }

    // clear prior highlightings (deletes info message if present)
    clearHighlights();

    m_incUi->next->setDisabled(pattern.isEmpty());
    m_incUi->prev->setDisabled(pattern.isEmpty());

    KateMatch match(m_view->doc(), searchOptions());

    if (!pattern.isEmpty()) {
        // Find, first try
        const Range inputRange = KTextEditor::Range(m_incInitCursor, m_view->document()->documentEnd());
        match.searchText(inputRange, pattern);
    }

    const bool wrap = !match.isValid() && !pattern.isEmpty();

    if (wrap) {
        // Find, second try
        const KTextEditor::Range inputRange = m_view->document()->documentRange();
        match.searchText(inputRange, pattern);
    }

    const MatchResult matchResult = match.isValid()   ? (wrap ? MatchWrappedForward : MatchFound) :
                                    pattern.isEmpty() ? MatchNothing :
                                    MatchMismatch;

    const Range selectionRange = pattern.isEmpty() ? Range(m_incInitCursor, m_incInitCursor) :
                                 match.isValid()   ? match.range() :
                                 Range::invalid();

    // don't update m_incInitCursor when we move the cursor
    disconnect(m_view, SIGNAL(cursorPositionChanged(KTextEditor::View*,KTextEditor::Cursor)),
               this, SLOT(updateIncInitCursor()));
    selectRange2(selectionRange);
    connect(m_view, SIGNAL(cursorPositionChanged(KTextEditor::View*,KTextEditor::Cursor)),
            this, SLOT(updateIncInitCursor()));

    indicateMatch(matchResult);
}

void KateSearchBar::setMatchCase(bool matchCase)
{
    if (this->matchCase() == matchCase) {
        return;
    }

    if (isPower()) {
        m_powerUi->matchCase->setChecked(matchCase);
    } else {
        m_incUi->matchCase->setChecked(matchCase);
    }
}

void KateSearchBar::onMatchCaseToggled(bool /*matchCase*/)
{
    sendConfig();

    if (m_incUi != 0) {
        // Re-search with new settings
        const QString pattern = m_incUi->pattern->currentText();
        onIncPatternChanged(pattern);
    } else {
        indicateMatch(MatchNothing);
    }
}

bool KateSearchBar::matchCase() const
{
    return isPower() ? m_powerUi->matchCase->isChecked()
           : m_incUi->matchCase->isChecked();
}

void KateSearchBar::fixForSingleLine(Range &range, SearchDirection searchDirection)
{
    FAST_DEBUG("Single-line workaround checking BEFORE" << range);
    if (searchDirection == SearchForward) {
        const int line = range.start().line();
        const int col = range.start().column();
        const int maxColWithNewline = m_view->document()->lineLength(line) + 1;
        if (col == maxColWithNewline) {
            FAST_DEBUG("Starting on a newline" << range);
            const int maxLine = m_view->document()->lines() - 1;
            if (line < maxLine) {
                range.setRange(Cursor(line + 1, 0), range.end());
                FAST_DEBUG("Search range fixed to " << range);
            } else {
                FAST_DEBUG("Already at last line");
                range = Range::invalid();
            }
        }
    } else {
        const int col = range.end().column();
        if (col == 0) {
            FAST_DEBUG("Ending after a newline" << range);
            const int line = range.end().line();
            if (line > 0) {
                const int maxColWithNewline = m_view->document()->lineLength(line - 1);
                range.setRange(range.start(), Cursor(line - 1, maxColWithNewline));
                FAST_DEBUG("Search range fixed to " << range);
            } else {
                FAST_DEBUG("Already at first line");
                range = Range::invalid();
            }
        }
    }
    FAST_DEBUG("Single-line workaround checking  AFTER" << range);
}

void KateSearchBar::onReturnPressed()
{
    const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
    const bool shiftDown = (modifiers & Qt::ShiftModifier) != 0;
    const bool controlDown = (modifiers & Qt::ControlModifier) != 0;

    if (shiftDown) {
        // Shift down, search backwards
        findPrevious();
    } else {
        // Shift up, search forwards
        findNext();
    }

    if (controlDown) {
        emit hideMe();
    }
}

bool KateSearchBar::find(SearchDirection searchDirection, const QString *replacement)
{
    // What to find?
    if (searchPattern().isEmpty()) {
        return false; // == Pattern error
    }

    // don't let selectionChanged signal mess around in this routine
    disconnect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));

    // clear previous highlights if there are any
    clearHighlights();

    const Search::SearchOptions enabledOptions = searchOptions(searchDirection);

    // Where to find?
    Range inputRange;
    const Range selection = m_view->selection() ? m_view->selectionRange() : Range::invalid();
    if (selection.isValid()) {
        if (selectionOnly()) {
            // First match in selection
            inputRange = selection;
        } else {
            // Next match after/before selection if a match was selected before
            if (searchDirection == SearchForward) {
                inputRange.setRange(selection.start(), m_view->document()->documentEnd());
            } else {
                inputRange.setRange(Cursor(0, 0), selection.end());
            }
        }
    } else {
        // No selection
        const Cursor cursorPos = m_view->cursorPosition();
        if (searchDirection == SearchForward) {
            inputRange.setRange(cursorPos, m_view->document()->documentEnd());
        } else {
            inputRange.setRange(Cursor(0, 0), cursorPos);
        }
    }
    FAST_DEBUG("Search range is" << inputRange);

    {
        const bool regexMode = enabledOptions.testFlag(Search::Regex);
        const bool multiLinePattern = regexMode ? KateRegExp(searchPattern()).isMultiLine() : false;

        // Single-line pattern workaround
        if (regexMode && !multiLinePattern) {
            fixForSingleLine(inputRange, searchDirection);
        }
    }

    KateMatch match(m_view->doc(), enabledOptions);
    Range afterReplace = Range::invalid();

    // Find, first try
    match.searchText(inputRange, searchPattern());
    if (match.isValid() && match.range() == selection) {
        // Same match again
        if (replacement != 0) {
            // Selection is match -> replace
            KTextEditor::MovingRange *smartInputRange = m_view->doc()->newMovingRange(inputRange, KTextEditor::MovingRange::ExpandLeft | KTextEditor::MovingRange::ExpandRight);
            afterReplace = match.replace(*replacement, m_view->blockSelection());
            inputRange = *smartInputRange;
            delete smartInputRange;
        }

        if (!selectionOnly()) {
            // Find, second try after old selection
            if (searchDirection == SearchForward) {
                const Cursor start = (replacement != 0) ? afterReplace.end() : selection.end();
                inputRange.setRange(start, inputRange.end());
            } else {
                const Cursor end = (replacement != 0) ? afterReplace.start() : selection.start();
                inputRange.setRange(inputRange.start(), end);
            }
        }

        // Single-line pattern workaround
        fixForSingleLine(inputRange, searchDirection);

        match.searchText(inputRange, searchPattern());
    }

    bool askWrap = !match.isValid() && (!selection.isValid() || !selectionOnly());
    bool wrap = false;

    if (askWrap) {
        askWrap = false;
        wrap = true;
    }

    if (askWrap) {
        QString question = searchDirection == SearchForward  ? i18n("Bottom of file reached. Continue from top?")
                           : i18n("Top of file reached. Continue from bottom?");
        wrap = (KMessageBox::questionYesNo(0, question, i18n("Continue search?"), KStandardGuiItem::yes(), KStandardGuiItem::no(),
                                           QLatin1String("DoNotShowAgainContinueSearchDialog")) == KMessageBox::Yes);

    }
    if (wrap) {
        // show message widget when wrapping (if not already present)
        if (searchDirection == SearchForward && !m_wrappedTopMessage) {
            const QString msg = i18n("Continuing search from top");
            m_wrappedTopMessage = new KTextEditor::Message(msg, KTextEditor::Message::Information);
            m_wrappedTopMessage->setPosition(KTextEditor::Message::TopInView);
            m_wrappedTopMessage->setAutoHide(2000);
            m_wrappedTopMessage->setAutoHideMode(KTextEditor::Message::Immediate);
            m_view->doc()->postMessage(m_wrappedTopMessage);
        } else if (searchDirection == SearchBackward && !m_wrappedBottomMessage) {
            const QString msg = i18n("Continuing search from bottom");
            m_wrappedBottomMessage = new KTextEditor::Message(msg, KTextEditor::Message::Information);
            m_wrappedBottomMessage->setPosition(KTextEditor::Message::BottomInView);
            m_wrappedBottomMessage->setAutoHide(2000);
            m_wrappedBottomMessage->setAutoHideMode(KTextEditor::Message::Immediate);
            m_view->doc()->postMessage(m_wrappedBottomMessage);
        }

        inputRange = m_view->document()->documentRange();
        match.searchText(inputRange, searchPattern());
    }

    if (match.isValid()) {
        selectRange2(match.range());
    }

    const MatchResult matchResult = !match.isValid()                 ? MatchMismatch :
                                    !wrap                            ? MatchFound :
                                    searchDirection == SearchForward ? MatchWrappedForward :
                                    MatchWrappedBackward;
    indicateMatch(matchResult);

    // highlight replacements if applicable
    if (afterReplace.isValid()) {
        highlightReplacement(afterReplace);
    }

    // restore connection
    connect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));

    return true; // == No pattern error
}

void KateSearchBar::findAll()
{
    // clear highlightings of prior search&replace action
    clearHighlights();

    Range inputRange = (m_view->selection() && selectionOnly())
                       ? m_view->selectionRange()
                       : m_view->document()->documentRange();
    const int occurrences = findAll(inputRange, NULL);

    // send passive notification to view
    showInfoMessage(i18ncp("short translation", "1 match found", "%1 matches found", occurrences));

    indicateMatch(occurrences > 0 ? MatchFound : MatchMismatch);
}

void KateSearchBar::onPowerPatternChanged(const QString & /*pattern*/)
{
    givePatternFeedback();
    indicateMatch(MatchNothing);
}

bool KateSearchBar::isPatternValid() const
{
    if (searchPattern().isEmpty()) {
        return false;
    }

    return searchOptions().testFlag(Search::WholeWords) ? searchPattern().trimmed() == searchPattern() :
           searchOptions().testFlag(Search::Regex)      ? QRegExp(searchPattern()).isValid() :
           true;
}

void KateSearchBar::givePatternFeedback()
{
    // Enable/disable next/prev and replace next/all
    m_powerUi->findNext->setEnabled(isPatternValid());
    m_powerUi->findPrev->setEnabled(isPatternValid());
    m_powerUi->replaceNext->setEnabled(isPatternValid());
    m_powerUi->replaceAll->setEnabled(isPatternValid());
}

void KateSearchBar::addCurrentTextToHistory(QComboBox *combo)
{
    const QString text = combo->currentText();
    const int index = combo->findText(text);

    if (index > 0) {
        combo->removeItem(index);
    }
    if (index != 0) {
        combo->insertItem(0, text);
        combo->setCurrentIndex(0);
    }
}

void KateSearchBar::backupConfig(bool ofPower)
{
    if (ofPower) {
        m_powerMatchCase = m_powerUi->matchCase->isChecked();
        m_powerMode = m_powerUi->searchMode->currentIndex();
    } else {
        m_incMatchCase = m_incUi->matchCase->isChecked();
    }
}

void KateSearchBar::sendConfig()
{
    const long pastFlags = m_config->searchFlags();
    long futureFlags = pastFlags;

    if (m_powerUi != NULL) {
        const bool OF_POWER = true;
        backupConfig(OF_POWER);

        // Update power search flags only
        const long incFlagsOnly = pastFlags
                                  & (KateViewConfig::IncHighlightAll
                                     | KateViewConfig::IncFromCursor
                                     | KateViewConfig::IncMatchCase);

        futureFlags = incFlagsOnly
                      | (m_powerMatchCase ? KateViewConfig::PowerMatchCase : 0)
                      | (m_powerFromCursor ? KateViewConfig::PowerFromCursor : 0)
                      | (m_powerHighlightAll ? KateViewConfig::PowerHighlightAll : 0)
                      | ((m_powerMode == MODE_REGEX)
                         ? KateViewConfig::PowerModeRegularExpression
                         : ((m_powerMode == MODE_ESCAPE_SEQUENCES)
                            ? KateViewConfig::PowerModeEscapeSequences
                            : ((m_powerMode == MODE_WHOLE_WORDS)
                               ? KateViewConfig::PowerModeWholeWords
                               : KateViewConfig::PowerModePlainText)));

    } else if (m_incUi != NULL) {
        const bool OF_INCREMENTAL = false;
        backupConfig(OF_INCREMENTAL);

        // Update incremental search flags only
        const long powerFlagsOnly = pastFlags
                                    & (KateViewConfig::PowerMatchCase
                                       | KateViewConfig::PowerFromCursor
                                       | KateViewConfig::PowerHighlightAll
                                       | KateViewConfig::PowerModeRegularExpression
                                       | KateViewConfig::PowerModeEscapeSequences
                                       | KateViewConfig::PowerModeWholeWords
                                       | KateViewConfig::PowerModePlainText);

        futureFlags = powerFlagsOnly
                      | (m_incHighlightAll ? KateViewConfig::IncHighlightAll : 0)
                      | (m_incFromCursor ? KateViewConfig::IncFromCursor : 0)
                      | (m_incMatchCase ? KateViewConfig::IncMatchCase : 0);
    }

    // Adjust global config
    m_config->setSearchFlags(futureFlags);
}

void KateSearchBar::replaceNext()
{
    const QString replacement = m_powerUi->replacement->currentText();

    if (find(SearchForward, &replacement)) {
        // Never merge replace actions with other replace actions/user actions
        m_view->doc()->undoManager()->undoSafePoint();

        // Add to search history
        addCurrentTextToHistory(m_powerUi->pattern);

        // Add to replace history
        addCurrentTextToHistory(m_powerUi->replacement);
    }
}

// replacement == NULL --> Highlight all matches
// replacement != NULL --> Replace and highlight all matches
int KateSearchBar::findAll(Range inputRange, const QString *replacement)
{
    // don't let selectionChanged signal mess around in this routine
    disconnect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));

    const Search::SearchOptions enabledOptions = searchOptions(SearchForward);

    const bool regexMode = enabledOptions.testFlag(Search::Regex);
    const bool multiLinePattern = regexMode ? KateRegExp(searchPattern()).isMultiLine() : false;

    KTextEditor::MovingRange *workingRange = m_view->doc()->newMovingRange(inputRange);
    QList<Range> highlightRanges;
    int matchCounter = 0;

    bool block = m_view->selection() && m_view->blockSelection();
    int line = inputRange.start().line();
    do {
        if (block) {
            workingRange = m_view->doc()->newMovingRange(m_view->doc()->rangeOnLine(inputRange, line));
        }

        for (;;) {
            KateMatch match(m_view->doc(), enabledOptions);
            match.searchText(*workingRange, searchPattern());
            if (!match.isValid()) {
                break;
            }
            bool const originalMatchEmpty = match.isEmpty();

            // Work with the match
            if (replacement != NULL) {
                if (matchCounter == 0) {
                    static_cast<KTextEditor::DocumentPrivate *>(m_view->document())->startEditing();
                }

                // Replace
                const Range afterReplace = match.replace(*replacement, false, ++matchCounter);

                // Highlight and continue after adjusted match
                //highlightReplacement(*afterReplace);
                highlightRanges << afterReplace;
            } else {
                // Highlight and continue after original match
                //highlightMatch(match);
                highlightRanges << match.range();
                matchCounter++;
            }

            // Continue after match
            if (highlightRanges.last().end() >= workingRange->end()) {
                break;
            }
            KTextEditor::MovingCursor *workingStart =
                static_cast<KTextEditor::DocumentPrivate *>(m_view->document())->newMovingCursor(highlightRanges.last().end());
            if (originalMatchEmpty) {
                // Can happen for regex patterns like "^".
                // If we don't advance here we will loop forever...
                workingStart->move(1);
            } else if (regexMode && !multiLinePattern && workingStart->atEndOfLine()) {
                // single-line regexps might match the naked line end
                // therefore we better advance to the next line
                workingStart->move(1);
            }
            workingRange->setRange(*workingStart, workingRange->end());

            const bool atEndOfDocument = workingStart->atEndOfDocument();
            delete workingStart;
            // Are we done?
            if (!workingRange->toRange().isValid() || atEndOfDocument) {
                break;
            }
        }

    } while (block && ++line <= inputRange.end().line());

    // After last match
    if (matchCounter > 0) {
        if (replacement != NULL) {
            static_cast<KTextEditor::DocumentPrivate *>(m_view->document())->finishEditing();
        }
    }

    if (replacement == NULL)
        foreach (const Range &r, highlightRanges) {
            highlightMatch(r);
        }
    else
        foreach (const Range &r, highlightRanges) {
            highlightReplacement(r);
        }

    delete workingRange;

    // restore connection
    connect(m_view, SIGNAL(selectionChanged(KTextEditor::View*)), this, SLOT(updateSelectionOnly()));

    return matchCounter;
}

void KateSearchBar::replaceAll()
{
    // clear prior highlightings (deletes info message if present)
    clearHighlights();

    // What to find/replace?
    const QString replacement = m_powerUi->replacement->currentText();

    // Where to replace?
    Range selection;
    const bool selected = m_view->selection();
    Range inputRange = (selected && selectionOnly())
                       ? m_view->selectionRange()
                       : m_view->document()->documentRange();

    // Pass on the hard work
    int replacementsDone = findAll(inputRange, &replacement);

    // send passive notification to view
    showInfoMessage(i18ncp("short translation", "1 replacement made", "%1 replacements made", replacementsDone));

    // Never merge replace actions with other replace actions/user actions
    m_view->doc()->undoManager()->undoSafePoint();

    // Add to search history
    addCurrentTextToHistory(m_powerUi->pattern);

    // Add to replace history
    addCurrentTextToHistory(m_powerUi->replacement);
}

void KateSearchBar::setSearchPattern(const QString &searchPattern)
{
    if (searchPattern == this->searchPattern()) {
        return;
    }

    if (isPower()) {
        m_powerUi->pattern->setEditText(searchPattern);
    } else {
        m_incUi->pattern->setEditText(searchPattern);
    }
}

QString KateSearchBar::searchPattern() const
{
    return (m_powerUi != 0) ? m_powerUi->pattern->currentText()
           : m_incUi->pattern->currentText();
}

void KateSearchBar::setSelectionOnly(bool selectionOnly)
{
    if (this->selectionOnly() == selectionOnly) {
        return;
    }

    if (isPower()) {
        m_powerUi->selectionOnly->setChecked(selectionOnly);
    }
}

bool KateSearchBar::selectionOnly() const
{
    return isPower() ? m_powerUi->selectionOnly->isChecked()
           : false;
}

KTextEditor::Search::SearchOptions KateSearchBar::searchOptions(SearchDirection searchDirection) const
{
    Search::SearchOptions enabledOptions = KTextEditor::Search::Default;

    if (!matchCase()) {
        enabledOptions |= Search::CaseInsensitive;
    }

    if (searchDirection == SearchBackward) {
        enabledOptions |= Search::Backwards;
    }

    if (m_powerUi != NULL) {
        switch (m_powerUi->searchMode->currentIndex()) {
        case MODE_WHOLE_WORDS:
            enabledOptions |= Search::WholeWords;
            break;

        case MODE_ESCAPE_SEQUENCES:
            enabledOptions |= Search::EscapeSequences;
            break;

        case MODE_REGEX:
            enabledOptions |= Search::Regex;
            break;

        case MODE_PLAIN_TEXT: // FALLTHROUGH
        default:
            break;

        }
    }

    return enabledOptions;
}

struct ParInfo {
    int openIndex;
    bool capturing;
    int captureNumber; // 1..9
};

QVector<QString> KateSearchBar::getCapturePatterns(const QString &pattern) const
{
    QVector<QString> capturePatterns;
    capturePatterns.reserve(9);
    QStack<ParInfo> parInfos;

    const int inputLen = pattern.length();
    int input = 0; // walker index
    bool insideClass = false;
    int captureCount = 0;

    while (input < inputLen) {
        if (insideClass) {
            // Wait for closing, unescaped ']'
            if (pattern[input].unicode() == L']') {
                insideClass = false;
            }
            input++;
        } else {
            switch (pattern[input].unicode()) {
            case L'\\':
                // Skip this and any next character
                input += 2;
                break;

            case L'(':
                ParInfo curInfo;
                curInfo.openIndex = input;
                curInfo.capturing = (input + 1 >= inputLen) || (pattern[input + 1].unicode() != '?');
                if (curInfo.capturing) {
                    captureCount++;
                }
                curInfo.captureNumber = captureCount;
                parInfos.push(curInfo);

                input++;
                break;

            case L')':
                if (!parInfos.empty()) {
                    ParInfo &top = parInfos.top();
                    if (top.capturing && (top.captureNumber <= 9)) {
                        const int start = top.openIndex + 1;
                        const int len = input - start;
                        if (capturePatterns.size() < top.captureNumber) {
                            capturePatterns.resize(top.captureNumber);
                        }
                        capturePatterns[top.captureNumber - 1] = pattern.mid(start, len);
                    }
                    parInfos.pop();
                }

                input++;
                break;

            case L'[':
                input++;
                insideClass = true;
                break;

            default:
                input++;
                break;

            }
        }
    }

    return capturePatterns;
}

void KateSearchBar::showExtendedContextMenu(bool forPattern, const QPoint &pos)
{
    // Make original menu
    QComboBox *comboBox = forPattern ? m_powerUi->pattern : m_powerUi->replacement;
    QMenu *const contextMenu = comboBox->lineEdit()->createStandardContextMenu();

    if (contextMenu == NULL) {
        return;
    }

    bool extendMenu = false;
    bool regexMode = false;
    switch (m_powerUi->searchMode->currentIndex()) {
    case MODE_REGEX:
        regexMode = true;
    // FALLTHROUGH

    case MODE_ESCAPE_SEQUENCES:
        extendMenu = true;
        break;

    default:
        break;
    }

    AddMenuManager addMenuManager(contextMenu, 37);
    if (!extendMenu) {
        addMenuManager.enableMenu(extendMenu);
    } else {
        // Build menu
        if (forPattern) {
            if (regexMode) {
                addMenuManager.addEntry(QLatin1String("^"), QString(), i18n("Beginning of line"));
                addMenuManager.addEntry(QLatin1String("$"), QString(), i18n("End of line"));
                addMenuManager.addSeparator();
                addMenuManager.addEntry(QLatin1String("."), QString(), i18n("Any single character (excluding line breaks)"));
                addMenuManager.addSeparator();
                addMenuManager.addEntry(QLatin1String("+"), QString(), i18n("One or more occurrences"));
                addMenuManager.addEntry(QLatin1String("*"), QString(), i18n("Zero or more occurrences"));
                addMenuManager.addEntry(QLatin1String("?"), QString(), i18n("Zero or one occurrences"));
                addMenuManager.addEntry(QLatin1String("{a"), QLatin1String(",b}"), i18n("<a> through <b> occurrences"), QLatin1String("{"), QLatin1String(",}"));
                addMenuManager.addSeparator();
                addMenuManager.addEntry(QLatin1String("("), QLatin1String(")"), i18n("Group, capturing"));
                addMenuManager.addEntry(QLatin1String("|"), QString(), i18n("Or"));
                addMenuManager.addEntry(QLatin1String("["), QLatin1String("]"), i18n("Set of characters"));
                addMenuManager.addEntry(QLatin1String("[^"), QLatin1String("]"), i18n("Negative set of characters"));
                addMenuManager.addSeparator();
            }
        } else {
            addMenuManager.addEntry(QLatin1String("\\0"), QString(), i18n("Whole match reference"));
            addMenuManager.addSeparator();
            if (regexMode) {
                const QString pattern = m_powerUi->pattern->currentText();
                const QVector<QString> capturePatterns = getCapturePatterns(pattern);

                const int captureCount = capturePatterns.count();
                for (int i = 1; i <= 9; i++) {
                    const QString number = QString::number(i);
                    const QString &captureDetails = (i <= captureCount)
                                                    ? (QString::fromLatin1(" = (") + capturePatterns[i - 1].left(30)) + QLatin1String(")")
                                                    : QString();
                    addMenuManager.addEntry(QLatin1String("\\") + number, QString(),
                                            i18n("Reference") + QLatin1Char(' ') + number + captureDetails);
                }

                addMenuManager.addSeparator();
            }
        }

        addMenuManager.addEntry(QLatin1String("\\n"), QString(), i18n("Line break"));
        addMenuManager.addEntry(QLatin1String("\\t"), QString(), i18n("Tab"));

        if (forPattern && regexMode) {
            addMenuManager.addEntry(QLatin1String("\\b"), QString(), i18n("Word boundary"));
            addMenuManager.addEntry(QLatin1String("\\B"), QString(), i18n("Not word boundary"));
            addMenuManager.addEntry(QLatin1String("\\d"), QString(), i18n("Digit"));
            addMenuManager.addEntry(QLatin1String("\\D"), QString(), i18n("Non-digit"));
            addMenuManager.addEntry(QLatin1String("\\s"), QString(), i18n("Whitespace (excluding line breaks)"));
            addMenuManager.addEntry(QLatin1String("\\S"), QString(), i18n("Non-whitespace (excluding line breaks)"));
            addMenuManager.addEntry(QLatin1String("\\w"), QString(), i18n("Word character (alphanumerics plus '_')"));
            addMenuManager.addEntry(QLatin1String("\\W"), QString(), i18n("Non-word character"));
        }

        addMenuManager.addEntry(QLatin1String("\\0???"), QString(), i18n("Octal character 000 to 377 (2^8-1)"), QLatin1String("\\0"));
        addMenuManager.addEntry(QLatin1String("\\x????"), QString(), i18n("Hex character 0000 to FFFF (2^16-1)"), QLatin1String("\\x"));
        addMenuManager.addEntry(QLatin1String("\\\\"), QString(), i18n("Backslash"));

        if (forPattern && regexMode) {
            addMenuManager.addSeparator();
            addMenuManager.addEntry(QLatin1String("(?:E"), QLatin1String(")"), i18n("Group, non-capturing"), QLatin1String("(?:"));
            addMenuManager.addEntry(QLatin1String("(?=E"), QLatin1String(")"), i18n("Lookahead"), QLatin1String("(?="));
            addMenuManager.addEntry(QLatin1String("(?!E"), QLatin1String(")"), i18n("Negative lookahead"), QLatin1String("(?!"));
        }

        if (!forPattern) {
            addMenuManager.addSeparator();
            addMenuManager.addEntry(QLatin1String("\\L"), QString(), i18n("Begin lowercase conversion"));
            addMenuManager.addEntry(QLatin1String("\\U"), QString(), i18n("Begin uppercase conversion"));
            addMenuManager.addEntry(QLatin1String("\\E"), QString(), i18n("End case conversion"));
            addMenuManager.addEntry(QLatin1String("\\l"), QString(), i18n("Lowercase first character conversion"));
            addMenuManager.addEntry(QLatin1String("\\u"), QString(), i18n("Uppercase first character conversion"));
            addMenuManager.addEntry(QLatin1String("\\#[#..]"), QString(), i18n("Replacement counter (for Replace All)"), QLatin1String("\\#"));
        }
    }

    // Show menu
    QAction *const result = contextMenu->exec(comboBox->mapToGlobal(pos));
    if (result != NULL) {
        addMenuManager.handle(result, comboBox->lineEdit());
    }
}

void KateSearchBar::onPowerModeChanged(int /*index*/)
{
    if (m_powerUi->searchMode->currentIndex() == MODE_REGEX) {
        m_powerUi->matchCase->setChecked(true);
    }

    sendConfig();
    indicateMatch(MatchNothing);

    givePatternFeedback();
}

/*static*/ void KateSearchBar::nextMatchForSelection(KTextEditor::ViewPrivate *view, SearchDirection searchDirection)
{
    const bool selected = view->selection();
    if (selected) {
        const QString pattern = view->selectionText();

        // How to find?
        Search::SearchOptions enabledOptions(KTextEditor::Search::Default);
        if (searchDirection == SearchBackward) {
            enabledOptions |= Search::Backwards;
        }

        // Where to find?
        const Range selRange = view->selectionRange();
        Range inputRange;
        if (searchDirection == SearchForward) {
            inputRange.setRange(selRange.end(), view->doc()->documentEnd());
        } else {
            inputRange.setRange(Cursor(0, 0), selRange.start());
        }

        // Find, first try
        KateMatch match(view->doc(), enabledOptions);
        match.searchText(inputRange, pattern);

        if (match.isValid()) {
            selectRange(view, match.range());
        } else {
            // Find, second try
            if (searchDirection == SearchForward) {
                inputRange.setRange(Cursor(0, 0), selRange.start());
            } else {
                inputRange.setRange(selRange.end(), view->doc()->documentEnd());
            }
            KateMatch match2(view->doc(), enabledOptions);
            match2.searchText(inputRange, pattern);
            if (match2.isValid()) {
                selectRange(view, match2.range());
            }
        }
    } else {
        // Select current word so we can search for that the next time
        const Cursor cursorPos = view->cursorPosition();
        KTextEditor::Range wordRange = view->document()->wordRangeAt(cursorPos);
        if (wordRange.isValid()) {
            selectRange(view, wordRange);
        }
    }
}

void KateSearchBar::enterPowerMode()
{
    QString initialPattern;
    bool selectionOnly = false;

    // Guess settings from context: init pattern with current selection
    const bool selected = m_view->selection();
    if (selected) {
        const Range &selection = m_view->selectionRange();
        if (selection.onSingleLine()) {
            // ... with current selection
            initialPattern = m_view->selectionText();
        } else {
            // Enable selection only
            selectionOnly = true;
        }
    }

    // If there's no new selection, we'll use the existing pattern
    if (initialPattern.isNull()) {
        // Coming from power search?
        const bool fromReplace = (m_powerUi != NULL) && (m_widget->isVisible());
        if (fromReplace) {
            QLineEdit *const patternLineEdit = m_powerUi->pattern->lineEdit();
            Q_ASSERT(patternLineEdit != NULL);
            patternLineEdit->selectAll();
            m_powerUi->pattern->setFocus(Qt::MouseFocusReason);
            return;
        }

        // Coming from incremental search?
        const bool fromIncremental = (m_incUi != NULL) && (m_widget->isVisible());
        if (fromIncremental) {
            initialPattern = m_incUi->pattern->currentText();
        }
    }

    // Create dialog
    const bool create = (m_powerUi == NULL);
    if (create) {
        // Kill incremental widget
        if (m_incUi != NULL) {
            // Backup current settings
            const bool OF_INCREMENTAL = false;
            backupConfig(OF_INCREMENTAL);

            // Kill widget
            delete m_incUi;
            m_incUi = NULL;
            m_layout->removeWidget(m_widget);
            m_widget->deleteLater(); // I didn't get a crash here but for symmetrie to the other mutate slot^
        }

        // Add power widget
        m_widget = new QWidget(this);
        m_powerUi = new Ui::PowerSearchBar;
        m_powerUi->setupUi(m_widget);
        m_layout->addWidget(m_widget);

        // Bind to shared history models
        m_powerUi->pattern->setDuplicatesEnabled(false);
        m_powerUi->pattern->setInsertPolicy(QComboBox::InsertAtTop);
        m_powerUi->pattern->setMaxCount(m_config->maxHistorySize());
        m_powerUi->pattern->setModel(m_config->patternHistoryModel());
        m_powerUi->replacement->setDuplicatesEnabled(false);
        m_powerUi->replacement->setInsertPolicy(QComboBox::InsertAtTop);
        m_powerUi->replacement->setMaxCount(m_config->maxHistorySize());
        m_powerUi->replacement->setModel(m_config->replacementHistoryModel());

        // Icons
        m_powerUi->mutate->setIcon(QIcon::fromTheme(QLatin1String("arrow-down-double")));
        m_powerUi->findNext->setIcon(QIcon::fromTheme(QLatin1String("go-down-search")));
        m_powerUi->findPrev->setIcon(QIcon::fromTheme(QLatin1String("go-up-search")));
        m_powerUi->findAll->setIcon(QIcon::fromTheme(QLatin1String("edit-find")));

        // Focus proxy
        centralWidget()->setFocusProxy(m_powerUi->pattern);

        // Make completers case-sensitive
        m_powerUi->pattern->completionObject()->setIgnoreCase(false);
        m_powerUi->replacement->completionObject()->setIgnoreCase(false);
    }

    m_powerUi->selectionOnly->setChecked(selectionOnly);

    // Restore previous settings
    if (create) {
        m_powerUi->matchCase->setChecked(m_powerMatchCase);
        m_powerUi->searchMode->setCurrentIndex(m_powerMode);
    }

    // force current index of -1 --> <cursor down> shows 1st completion entry instead of 2nd
    m_powerUi->pattern->setCurrentIndex(-1);
    m_powerUi->replacement->setCurrentIndex(-1);

    // Set initial search pattern
    QLineEdit *const patternLineEdit = m_powerUi->pattern->lineEdit();
    Q_ASSERT(patternLineEdit != NULL);
    patternLineEdit->setText(initialPattern);
    patternLineEdit->selectAll();

    // Set initial replacement text
    QLineEdit *const replacementLineEdit = m_powerUi->replacement->lineEdit();
    Q_ASSERT(replacementLineEdit != NULL);
    replacementLineEdit->setText(QString());

    // Propagate settings (slots are still inactive on purpose)
    onPowerPatternChanged(initialPattern);
    givePatternFeedback();

    if (create) {
        // Slots
        connect(m_powerUi->mutate, SIGNAL(clicked()), this, SLOT(enterIncrementalMode()));
        connect(patternLineEdit, SIGNAL(textChanged(QString)), this, SLOT(onPowerPatternChanged(QString)));
        connect(m_powerUi->findNext, SIGNAL(clicked()), this, SLOT(findNext()));
        connect(m_powerUi->findPrev, SIGNAL(clicked()), this, SLOT(findPrevious()));
        connect(m_powerUi->replaceNext, SIGNAL(clicked()), this, SLOT(replaceNext()));
        connect(m_powerUi->replaceAll, SIGNAL(clicked()), this, SLOT(replaceAll()));
        connect(m_powerUi->searchMode, SIGNAL(currentIndexChanged(int)), this, SLOT(onPowerModeChanged(int)));
        connect(m_powerUi->matchCase, SIGNAL(toggled(bool)), this, SLOT(onMatchCaseToggled(bool)));
        connect(m_powerUi->findAll, SIGNAL(clicked()), this, SLOT(findAll()));

        // Make [return] in pattern line edit trigger <find next> action
        connect(patternLineEdit, SIGNAL(returnPressed()), this, SLOT(onReturnPressed()));
        connect(replacementLineEdit, SIGNAL(returnPressed()), this, SLOT(replaceNext()));

        // Hook into line edit context menus
        m_powerUi->pattern->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(m_powerUi->pattern, SIGNAL(customContextMenuRequested(QPoint)), this,
                SLOT(onPowerPatternContextMenuRequest(QPoint)));
        m_powerUi->replacement->setContextMenuPolicy(Qt::CustomContextMenu);
        connect(m_powerUi->replacement, SIGNAL(customContextMenuRequested(QPoint)), this,
                SLOT(onPowerReplacmentContextMenuRequest(QPoint)));
    }

    // Focus
    if (m_widget->isVisible()) {
        m_powerUi->pattern->setFocus(Qt::MouseFocusReason);
    }
}

void KateSearchBar::enterIncrementalMode()
{
    QString initialPattern;

    // Guess settings from context: init pattern with current selection
    const bool selected = m_view->selection();
    if (selected) {
        const Range &selection = m_view->selectionRange();
        if (selection.onSingleLine()) {
            // ... with current selection
            initialPattern = m_view->selectionText();
        }
    }

    // If there's no new selection, we'll use the existing pattern
    if (initialPattern.isNull()) {
        // Coming from incremental search?
        const bool fromIncremental = (m_incUi != NULL) && (m_widget->isVisible());
        if (fromIncremental) {
            m_incUi->pattern->lineEdit()->selectAll();
            m_incUi->pattern->setFocus(Qt::MouseFocusReason);
            return;
        }

        // Coming from power search?
        const bool fromReplace = (m_powerUi != NULL) && (m_widget->isVisible());
        if (fromReplace) {
            initialPattern = m_powerUi->pattern->currentText();
        }
    }

    // Still no search pattern? Use the word under the cursor
    if (initialPattern.isNull()) {
        const KTextEditor::Cursor cursorPosition = m_view->cursorPosition();
        initialPattern = m_view->doc()->wordAt(cursorPosition);
    }

    // Create dialog
    const bool create = (m_incUi == NULL);
    if (create) {
        // Kill power widget
        if (m_powerUi != NULL) {
            // Backup current settings
            const bool OF_POWER = true;
            backupConfig(OF_POWER);

            // Kill widget
            delete m_powerUi;
            m_powerUi = NULL;
            m_layout->removeWidget(m_widget);
            m_widget->deleteLater(); //deleteLater, because it's not a good idea too delete the widget and there for the button triggering this slot
        }

        // Add incremental widget
        m_widget = new QWidget(this);
        m_incUi = new Ui::IncrementalSearchBar;
        m_incUi->setupUi(m_widget);
        m_layout->addWidget(m_widget);

//         new QShortcut(KStandardShortcut::paste().primary(), m_incUi->pattern, SLOT(paste()), 0, Qt::WidgetWithChildrenShortcut);
//         if (!KStandardShortcut::paste().alternate().isEmpty())
//             new QShortcut(KStandardShortcut::paste().alternate(), m_incUi->pattern, SLOT(paste()), 0, Qt::WidgetWithChildrenShortcut);

        // Icons
        m_incUi->mutate->setIcon(QIcon::fromTheme(QLatin1String("arrow-up-double")));
        m_incUi->next->setIcon(QIcon::fromTheme(QLatin1String("go-down-search")));
        m_incUi->prev->setIcon(QIcon::fromTheme(QLatin1String("go-up-search")));

        // Ensure minimum size
        m_incUi->pattern->setMinimumWidth(12 * m_incUi->pattern->fontMetrics().height());

        // Customize status area
        m_incUi->status->setTextElideMode(Qt::ElideLeft);

        // Focus proxy
        centralWidget()->setFocusProxy(m_incUi->pattern);

        m_incUi->pattern->setDuplicatesEnabled(false);
        m_incUi->pattern->setInsertPolicy(QComboBox::InsertAtTop);
        m_incUi->pattern->setMaxCount(m_config->maxHistorySize());
        m_incUi->pattern->setModel(m_config->patternHistoryModel());
        m_incUi->pattern->setAutoCompletion(false);
    }

    // Restore previous settings
    if (create) {
        m_incUi->matchCase->setChecked(m_incMatchCase);
    }

    // force current index of -1 --> <cursor down> shows 1st completion entry instead of 2nd
    m_incUi->pattern->setCurrentIndex(-1);

    // Set initial search pattern
    if (!create) {
        disconnect(m_incUi->pattern, SIGNAL(editTextChanged(QString)), this, SLOT(onIncPatternChanged(QString)));
    }
    m_incUi->pattern->setEditText(initialPattern);
    connect(m_incUi->pattern, SIGNAL(editTextChanged(QString)), this, SLOT(onIncPatternChanged(QString)));
    m_incUi->pattern->lineEdit()->selectAll();

    // Propagate settings (slots are still inactive on purpose)
    if (initialPattern.isEmpty()) {
        // Reset edit color
        indicateMatch(MatchNothing);
    }

    // Enable/disable next/prev
    m_incUi->next->setDisabled(initialPattern.isEmpty());
    m_incUi->prev->setDisabled(initialPattern.isEmpty());

    if (create) {
        // Slots
        connect(m_incUi->mutate, SIGNAL(clicked()), this, SLOT(enterPowerMode()));
        connect(m_incUi->pattern->lineEdit(), SIGNAL(returnPressed()), this, SLOT(onReturnPressed()));
        connect(m_incUi->next, SIGNAL(clicked()), this, SLOT(findNext()));
        connect(m_incUi->prev, SIGNAL(clicked()), this, SLOT(findPrevious()));
        connect(m_incUi->matchCase, SIGNAL(toggled(bool)), this, SLOT(onMatchCaseToggled(bool)));
    }

    // Focus
    if (m_widget->isVisible()) {
        m_incUi->pattern->setFocus(Qt::MouseFocusReason);
    }
}

bool KateSearchBar::clearHighlights()
{
    if (m_infoMessage) {
        delete m_infoMessage;
    }

    if (m_hlRanges.isEmpty()) {
        return false;
    }
    qDeleteAll(m_hlRanges);
    m_hlRanges.clear();
    return true;
}

void KateSearchBar::updateHighlightColors()
{
    const QColor &searchColor = m_view->renderer()->config()->searchHighlightColor();
    const QColor &replaceColor = m_view->renderer()->config()->replaceHighlightColor();

    // init match attribute
    highlightMatchAttribute->setBackground(searchColor);
    highlightMatchAttribute->dynamicAttribute(Attribute::ActivateMouseIn)->setBackground(searchColor);
    highlightMatchAttribute->dynamicAttribute(Attribute::ActivateCaretIn)->setBackground(searchColor);

    // init replacement attribute
    highlightReplacementAttribute->setBackground(replaceColor);
}

void KateSearchBar::showEvent(QShowEvent *event)
{
    // Update init cursor
    if (m_incUi != NULL) {
        m_incInitCursor = m_view->cursorPosition();
    }

    updateSelectionOnly();
    KateViewBarWidget::showEvent(event);
}

void KateSearchBar::updateSelectionOnly()
{
    if (m_powerUi == NULL) {
        return;
    }

    // Re-init "Selection only" checkbox if power search bar open
    const bool selected = m_view->selection();
    bool selectionOnly = selected;
    if (selected) {
        Range const &selection = m_view->selectionRange();
        selectionOnly = !selection.onSingleLine();
    }
    m_powerUi->selectionOnly->setChecked(selectionOnly);
}

void KateSearchBar::updateIncInitCursor()
{
    if (m_incUi == NULL) {
        return;
    }

    // Update init cursor
    m_incInitCursor = m_view->cursorPosition();
}

void KateSearchBar::onPowerPatternContextMenuRequest(const QPoint &pos)
{
    const bool FOR_PATTERN = true;
    showExtendedContextMenu(FOR_PATTERN, pos);
}

void KateSearchBar::onPowerPatternContextMenuRequest()
{
    onPowerPatternContextMenuRequest(m_powerUi->pattern->mapFromGlobal(QCursor::pos()));
}

void KateSearchBar::onPowerReplacmentContextMenuRequest(const QPoint &pos)
{
    const bool FOR_REPLACEMENT = false;
    showExtendedContextMenu(FOR_REPLACEMENT, pos);
}

void KateSearchBar::onPowerReplacmentContextMenuRequest()
{
    onPowerReplacmentContextMenuRequest(m_powerUi->replacement->mapFromGlobal(QCursor::pos()));
}

bool KateSearchBar::isPower() const
{
    return m_powerUi != 0;
}

void KateSearchBar::slotReadWriteChanged()
{
    if (!KateSearchBar::isPower()) {
        return;
    }

    // perhaps disable/enable
    m_powerUi->replaceNext->setEnabled(m_view->doc()->isReadWrite() && isPatternValid());
    m_powerUi->replaceAll->setEnabled(m_view->doc()->isReadWrite() && isPatternValid());
}

