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ISearchPlugin.cpp

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 /* This file is part of the KDE libraries
    Copyright (C) 2002 by John Firebaugh <jfirebaugh@kde.org>

    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 <qlabel.h>
#include <qregexp.h>
#include <qstyle.h>
#include <qpopupmenu.h>
#include <kgenericfactory.h>
#include <klocale.h>
#include <kaction.h>
#include <kcombobox.h>
#include <kconfig.h>
#include <kdebug.h>

#include "ISearchPlugin.h"
#include "ISearchPlugin.moc"

K_EXPORT_COMPONENT_FACTORY( ktexteditor_isearch, KGenericFactory<ISearchPlugin>( "ktexteditor_isearch" ) )

ISearchPluginView::ISearchPluginView( KTextEditor::View *view )
    : QObject ( view ), KXMLGUIClient (view)
    , m_view( 0L )
    , m_doc( 0L )
    , m_searchIF( 0L )
    , m_cursorIF( 0L )
    , m_selectIF( 0L )
//  , m_toolBarAction( 0L )
    , m_searchForwardAction( 0L )
    , m_searchBackwardAction( 0L )
    , m_label( 0L )
    , m_combo( 0L )
    , m_lastString( "" )
    , m_searchBackward( false )
    , m_caseSensitive( false )
    , m_fromBeginning( false )
    , m_regExp( false )
    , m_autoWrap( false )
    , m_wrapped( false )
    , m_startLine( 0 )
    , m_startCol( 0 )
    , m_searchLine( 0 )
    , m_searchCol( 0 )
    , m_foundLine( 0 )
    , m_foundCol( 0 )
    , m_matchLen( 0 )
    , m_toolBarWasHidden( false )
{
    view->insertChildClient (this);

    setInstance( KGenericFactory<ISearchPlugin>::instance() );

    m_searchForwardAction = new KAction(
        i18n("Search Incrementally"), CTRL+ALT+Key_F,
        this, SLOT(slotSearchForwardAction()),
        actionCollection(), "edit_isearch" );
    m_searchBackwardAction = new KAction(
        i18n("Search Incrementally Backwards"), CTRL+ALT+SHIFT+Key_F,
        this, SLOT(slotSearchBackwardAction()),
        actionCollection(), "edit_isearch_reverse" );

    m_label = new QLabel( i18n("I-Search:"), 0L, "kde toolbar widget" );
    KWidgetAction* labelAction = new KWidgetAction(
        m_label,
        i18n("I-Search:"), 0, 0, 0,
        actionCollection(), "isearch_label" );
    labelAction->setShortcutConfigurable( false );

    m_combo = new KHistoryCombo();
    m_combo->setDuplicatesEnabled( false );
    m_combo->setMaximumWidth( 300 );
    m_combo->lineEdit()->installEventFilter( this );
    connect( m_combo, SIGNAL(textChanged(const QString&)),
             this, SLOT(slotTextChanged(const QString&)) );
    connect( m_combo, SIGNAL(returnPressed(const QString&)),
             this, SLOT(slotReturnPressed(const QString&)) );
    connect( m_combo, SIGNAL(aboutToShowContextMenu(QPopupMenu*)),
         this, SLOT(slotAddContextMenuItems(QPopupMenu*)) );
    m_comboAction = new KWidgetAction(
        m_combo,
        i18n("Search"), 0, 0, 0,
        actionCollection(), "isearch_combo" );
    m_comboAction->setAutoSized( true );
    m_comboAction->setShortcutConfigurable( false );

    KActionMenu* optionMenu = new KActionMenu(
        i18n("Search Options"), "configure",
        actionCollection(), "isearch_options" );
    optionMenu->setDelayed( false );

    KToggleAction* action = new KToggleAction(
        i18n("Case Sensitive"), KShortcut(),
        actionCollection(), "isearch_case_sensitive" );
    action->setShortcutConfigurable( false );
    connect( action, SIGNAL(toggled(bool)),
             this, SLOT(setCaseSensitive(bool)) );
    action->setChecked( m_caseSensitive );
    optionMenu->insert( action );

    action = new KToggleAction(
        i18n("From Beginning"), KShortcut(),
        actionCollection(), "isearch_from_beginning" );
    action->setShortcutConfigurable( false );
    connect( action, SIGNAL(toggled(bool)),
             this, SLOT(setFromBeginning(bool)) );
    action->setChecked( m_fromBeginning );
    optionMenu->insert( action );

    action = new KToggleAction(
        i18n("Regular Expression"), KShortcut(),
        actionCollection(), "isearch_reg_exp" );
    action->setShortcutConfigurable( false );
    connect( action, SIGNAL(toggled(bool)),
             this, SLOT(setRegExp(bool)) );
    action->setChecked( m_regExp );
    optionMenu->insert( action );

//  optionMenu->insert( new KActionSeparator() );
//
//  action = new KToggleAction(
//      i18n("Auto-Wrap Search"), KShortcut(),
//      actionCollection(), "isearch_auto_wrap" );
//  connect( action, SIGNAL(toggled(bool)),
//           this, SLOT(setAutoWrap(bool)) );
//  action->setChecked( m_autoWrap );
//  optionMenu->insert( action );

    setXMLFile( "ktexteditor_isearchui.rc" );
}

ISearchPluginView::~ISearchPluginView()
{
    writeConfig();
    m_combo->lineEdit()->removeEventFilter( this );
    delete m_combo;
    delete m_label;
}

void ISearchPluginView::setView( KTextEditor::View* view )
{
    m_view = view;
    m_doc  = m_view->document();
    m_searchIF = KTextEditor::searchInterface ( m_doc );
    m_cursorIF = KTextEditor::viewCursorInterface ( m_view );
    m_selectIF = KTextEditor::selectionInterface ( m_doc );
    if( !m_doc || !m_cursorIF || !m_selectIF ) {
        m_view = 0L;
        m_doc = 0L;
        m_searchIF = 0L;
        m_cursorIF = 0L;
        m_selectIF = 0L;
    }

    readConfig();
}

void ISearchPluginView::readConfig()
{
    // KConfig* config = instance()->config();
}

void ISearchPluginView::writeConfig()
{
    // KConfig* config = instance()->config();
}

void ISearchPluginView::setCaseSensitive( bool caseSensitive )
{
    m_caseSensitive = caseSensitive;
}

void ISearchPluginView::setFromBeginning( bool fromBeginning )
{
    m_fromBeginning = fromBeginning;

    if( m_fromBeginning ) {
        m_searchLine = m_searchCol = 0;
    }
}

void ISearchPluginView::setRegExp( bool regExp )
{
    m_regExp = regExp;
}

void ISearchPluginView::setAutoWrap( bool autoWrap )
{
    m_autoWrap = autoWrap;
}

bool ISearchPluginView::eventFilter( QObject* o, QEvent* e )
{
    if( o != m_combo->lineEdit() )
        return false;

    if( e->type() == QEvent::FocusIn ) {
        QFocusEvent* focusEvent = (QFocusEvent*)e;
        if( focusEvent->reason() == QFocusEvent::ActiveWindow ||
            focusEvent->reason() == QFocusEvent::Popup )
            return false;
        startSearch();
    }

    if( e->type() == QEvent::FocusOut ) {
        QFocusEvent* focusEvent = (QFocusEvent*)e;
        if( focusEvent->reason() == QFocusEvent::ActiveWindow ||
            focusEvent->reason() == QFocusEvent::Popup )
            return false;
        endSearch();
    }

    if( e->type() == QEvent::KeyPress ) {
        QKeyEvent *keyEvent = (QKeyEvent*)e;
        if( keyEvent->key() == Qt::Key_Escape )
            quitToView( QString::null );
    }

    return false;
}

// Sigh... i18n hell.
void ISearchPluginView::updateLabelText(
    bool failing /* = false */, bool reverse /* = false */,
    bool wrapped /* = false */, bool overwrapped /* = false */ )
{
    QString text;
    // Reverse binary:
    // 0000
    if( !failing && !reverse && !wrapped && !overwrapped ) {
        text = i18n("Incremental Search", "I-Search:");
    // 1000
    } else if ( failing && !reverse && !wrapped && !overwrapped ) {
        text = i18n("Incremental Search found no match", "Failing I-Search:");
    // 0100
    } else if ( !failing && reverse && !wrapped && !overwrapped ) {
        text = i18n("Incremental Search in the reverse direction", "I-Search Backward:");
    // 1100
    } else if ( failing && reverse && !wrapped && !overwrapped ) {
        text = i18n("Failing I-Search Backward:");
    // 0010
    } else if ( !failing && !reverse && wrapped  && !overwrapped ) {
        text = i18n("Incremental Search has passed the end of the document", "Wrapped I-Search:");
    // 1010
    } else if ( failing && !reverse && wrapped && !overwrapped ) {
        text = i18n("Failing Wrapped I-Search:");
    // 0110
    } else if ( !failing && reverse && wrapped && !overwrapped ) {
        text = i18n("Wrapped I-Search Backward:");
    // 1110
    } else if ( failing && reverse && wrapped && !overwrapped ) {
        text = i18n("Failing Wrapped I-Search Backward:");
    // 0011
    } else if ( !failing && !reverse && overwrapped ) {
        text = i18n("Incremental Search has passed both the end of the document "
                    "and the original starting position", "Overwrapped I-Search:");
    // 1011
    } else if ( failing && !reverse && overwrapped ) {
        text = i18n("Failing Overwrapped I-Search:");
    // 0111
    } else if ( !failing && reverse && overwrapped ) {
        text = i18n("Overwrapped I-Search Backwards:");
    // 1111
    } else if ( failing && reverse && overwrapped ) {
        text = i18n("Failing Overwrapped I-Search Backward:");
    } else {
        text = i18n("Error: unknown i-search state!");
    }
    m_label->setText( text );
}

void ISearchPluginView::slotSearchForwardAction()
{
    slotSearchAction( false );
}

void ISearchPluginView::slotSearchBackwardAction()
{
    slotSearchAction( true );
}

void ISearchPluginView::slotSearchAction( bool reverse )
{
    if( !m_combo->hasFocus() ) {
        if( m_comboAction->container(0) && m_comboAction->container(0)->isHidden() ) {
            m_toolBarWasHidden = true;
            m_comboAction->container(0)->setHidden( false );
        } else {
            m_toolBarWasHidden = false;
        }
        m_combo->setFocus(); // Will call startSearch()
    } else {
        nextMatch( reverse );
    }
}

void ISearchPluginView::nextMatch( bool reverse )
{
    QString text = m_combo->currentText();
    if( text.isEmpty() )
        return;
    if( state != MatchSearch ) {
        // Last search was performed by typing, start from that match.
        if( !reverse ) {
            m_searchLine = m_foundLine;
            m_searchCol = m_foundCol + m_matchLen;
        } else {
            m_searchLine = m_foundLine;
            m_searchCol = m_foundCol;
        }
        state = MatchSearch;
    }
        
    bool found = iSearch( m_searchLine, m_searchCol, text, reverse, m_autoWrap );
    if( found ) {
        m_searchLine = m_foundLine;
        m_searchCol = m_foundCol + m_matchLen;
    } else {
        m_wrapped = true;
        m_searchLine = m_searchCol = 0;
    }
}

void ISearchPluginView::startSearch()
{
    if( !m_view ) return;

    m_searchForwardAction->setText( i18n("Next Incremental Search Match") );
    m_searchBackwardAction->setText( i18n("Previous Incremental Search Match") );

    m_wrapped = false;

    if( m_fromBeginning ) {
        m_startLine = m_startCol = 0;
    } else {
        m_cursorIF->cursorPositionReal( &m_startLine, &m_startCol );
    }
    m_searchLine = m_startLine;
    m_searchCol = m_startCol;

    updateLabelText( false, m_searchBackward );

    m_combo->blockSignals( true );

    QString text = m_selectIF->selection();
    if( text.isEmpty() )
        text = m_lastString;
    m_combo->setCurrentText( text );

    m_combo->blockSignals( false );
    m_combo->lineEdit()->selectAll();

//  kdDebug() << "Starting search at " << m_startLine << ", " << m_startCol << endl;
}

void ISearchPluginView::endSearch()
{
    m_searchForwardAction->setText( i18n("Search Incrementally") );
    m_searchBackwardAction->setText( i18n("Search Incrementally Backwards") );

    updateLabelText();

    if( m_toolBarWasHidden && m_comboAction->containerCount() > 0 ) {
        m_comboAction->container(0)->setHidden( true );
    }
}

void ISearchPluginView::quitToView( const QString &text )
{
    if( !text.isNull() && !text.isEmpty() ) {
        m_combo->addToHistory( text );
        m_lastString = text;
    }

    if( m_view ) {
        m_view->setFocus(); // Will call endSearch()
    }
}

void ISearchPluginView::slotTextChanged( const QString& text )
{
    state = TextSearch;

    if( text.isEmpty() )
        return;

    iSearch( m_searchLine, m_searchCol, text, m_searchBackward, m_autoWrap );
}

void ISearchPluginView::slotReturnPressed( const QString& text )
{
    quitToView( text );
}

void ISearchPluginView::slotAddContextMenuItems( QPopupMenu *menu )
{
    if( menu ) {
        menu->insertSeparator();
        menu->insertItem( i18n("Case Sensitive"), this,
                  SLOT(setCaseSensitive(bool)));
        menu->insertItem( i18n("From Beginning"), this,
                  SLOT(setFromBeginning(bool)));
        menu->insertItem( i18n("Regular Expression"), this,
                  SLOT(setRegExp(bool)));
        //menu->insertItem( i18n("Auto-Wrap Search"), this,
        //        SLOT(setAutoWrap(bool)));
    }
}

bool ISearchPluginView::iSearch(
    uint startLine, uint startCol,
    const QString& text, bool reverse,
    bool autoWrap )
{
    if( !m_view ) return false;

//  kdDebug() << "Searching for " << text << " at " << startLine << ", " << startCol << endl;
    bool found = false;
    if( !m_regExp ) {
        found = m_searchIF->searchText( startLine,
                       startCol,
                       text,
                       &m_foundLine,
                       &m_foundCol,
                       &m_matchLen,
                       m_caseSensitive,
                       reverse );
    } else {
        found = m_searchIF->searchText( startLine,
                       startCol,
                       QRegExp( text ),
                       &m_foundLine,
                       &m_foundCol,
                       &m_matchLen,
                       reverse );
    }
    if( found ) {
//      kdDebug() << "Found '" << text << "' at " << m_foundLine << ", " << m_foundCol << endl;
//      v->gotoLineNumber( m_foundLine );
        m_cursorIF->setCursorPositionReal( m_foundLine, m_foundCol + m_matchLen );
        m_selectIF->setSelection( m_foundLine, m_foundCol, m_foundLine, m_foundCol + m_matchLen );
    } else if ( autoWrap ) {
        m_wrapped = true;
        found = iSearch( 0, 0, text, reverse, false );
    }
    // FIXME
    bool overwrapped = ( m_wrapped &&
        ((m_foundLine > m_startLine ) ||
         (m_foundLine == m_startLine && m_foundCol >= m_startCol)) );
//  kdDebug() << "Overwrap = " << overwrapped << ". Start was " << m_startLine << ", " << m_startCol << endl;
    updateLabelText( !found, reverse, m_wrapped, overwrapped );
    return found;
}

ISearchPlugin::ISearchPlugin( QObject *parent, const char* name, const QStringList& )
    : KTextEditor::Plugin ( (KTextEditor::Document*) parent, name )
{
}

ISearchPlugin::~ISearchPlugin()
{
}

void ISearchPlugin::addView(KTextEditor::View *view)
{
    ISearchPluginView *nview = new ISearchPluginView (view);
    nview->setView (view);
    m_views.append (nview);
}

void ISearchPlugin::removeView(KTextEditor::View *view)
{
    for (uint z=0; z < m_views.count(); z++)
        {
        if (m_views.at(z)->parentClient() == view)
        {
            ISearchPluginView *nview = m_views.at(z);
            m_views.remove (nview);
            delete nview;
        }
    }
}

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