kate Library API Documentation

docwordcompletion.cpp

00001 /*
00002     This library is free software; you can redistribute it and/or
00003     modify it under the terms of the GNU Library General Public
00004     License version 2 as published by the Free Software Foundation.
00005 
00006     This library is distributed in the hope that it will be useful,
00007     but WITHOUT ANY WARRANTY; without even the implied warranty of
00008     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00009     Library General Public License for more details.
00010 
00011     You should have received a copy of the GNU Library General Public License
00012     along with this library; see the file COPYING.LIB.  If not, write to
00013     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00014     Boston, MA 02111-1307, USA.
00015 
00016     ---
00017     file: docwordcompletion.cpp
00018 
00019     KTextEditor plugin to autocompletion with document words.
00020     Copyright Anders Lund <anders.lund@lund.tdcadsl.dk>, 2003
00021 
00022     The following completion methods are supported:
00023     * Completion with bigger matching words in
00024       either direction (backward/forward).
00025     * NOT YET Pop up a list of all bigger matching words in document
00026 
00027 */
00028 //BEGIN includes
00029 #include "docwordcompletion.h"
00030 
00031 #include <ktexteditor/document.h>
00032 #include <ktexteditor/viewcursorinterface.h>
00033 #include <ktexteditor/editinterface.h>
00034 #include <ktexteditor/variableinterface.h>
00035 
00036 #include <kapplication.h>
00037 #include <kconfig.h>
00038 #include <kdialog.h>
00039 #include <kgenericfactory.h>
00040 #include <klocale.h>
00041 #include <kaction.h>
00042 #include <knotifyclient.h>
00043 #include <kparts/part.h>
00044 #include <kiconloader.h>
00045 
00046 #include <qregexp.h>
00047 #include <qstring.h>
00048 #include <qdict.h>
00049 #include <qspinbox.h>
00050 #include <qlabel.h>
00051 #include <qlayout.h>
00052 #include <qhbox.h>
00053 #include <qwhatsthis.h>
00054 #include <qcheckbox.h>
00055 
00056 // #include <kdebug.h>
00057 //END
00058 
00059 //BEGIN DocWordCompletionPlugin
00060 K_EXPORT_COMPONENT_FACTORY( ktexteditor_docwordcompletion, KGenericFactory<DocWordCompletionPlugin>( "ktexteditor_docwordcompletion" ) )
00061 DocWordCompletionPlugin::DocWordCompletionPlugin( QObject *parent,
00062                             const char* name,
00063                             const QStringList& /*args*/ )
00064     : KTextEditor::Plugin ( (KTextEditor::Document*) parent, name )
00065 {
00066   readConfig();
00067 }
00068 
00069 void DocWordCompletionPlugin::readConfig()
00070 {
00071   KConfig *config = kapp->config();
00072   config->setGroup( "DocWordCompletion Plugin" );
00073   m_treshold = config->readNumEntry( "treshold", 3 );
00074   m_autopopup = config->readBoolEntry( "autopopup", true );
00075 }
00076 
00077 void DocWordCompletionPlugin::writeConfig()
00078 {
00079   KConfig *config = kapp->config();
00080   config->setGroup("DocWordCompletion Plugin");
00081   config->writeEntry("autopopup", m_autopopup );
00082   config->writeEntry("treshold", m_treshold );
00083 }
00084 
00085 void DocWordCompletionPlugin::addView(KTextEditor::View *view)
00086 {
00087   DocWordCompletionPluginView *nview = new DocWordCompletionPluginView (m_treshold, m_autopopup, view, "Document word completion");
00088   m_views.append (nview);
00089 }
00090 
00091 void DocWordCompletionPlugin::removeView(KTextEditor::View *view)
00092 {
00093   for (uint z=0; z < m_views.count(); z++)
00094     if (m_views.at(z)->parentClient() == view)
00095     {
00096        DocWordCompletionPluginView *nview = m_views.at(z);
00097        m_views.remove (nview);
00098        delete nview;
00099     }
00100 }
00101 
00102 KTextEditor::ConfigPage* DocWordCompletionPlugin::configPage( uint, QWidget *parent, const char *name )
00103 {
00104   return new DocWordCompletionConfigPage( this, parent, name );
00105 }
00106 
00107 QString DocWordCompletionPlugin::configPageName( uint ) const
00108 {
00109   return i18n("Word Completion Plugin");
00110 }
00111 
00112 QString DocWordCompletionPlugin::configPageFullName( uint ) const
00113 {
00114   return i18n("Configure the Word Completion Plugin");
00115 }
00116 
00117 // FIXME provide sucn a icon
00118        QPixmap DocWordCompletionPlugin::configPagePixmap( uint, int size ) const
00119 {
00120   return UserIcon( "kte_wordcompletion", size );
00121 }
00122 //END
00123 
00124 //BEGIN DocWordCompletionPluginView
00125 struct DocWordCompletionPluginViewPrivate
00126 {
00127   uint line, col;       // start position of last match (where to search from)
00128   uint cline, ccol;     // cursor position
00129   uint lilen;           // length of last insertion
00130   QString last;         // last word we were trying to match
00131   QString lastIns;      // latest applied completion
00132   QRegExp re;           // hrm
00133   KToggleAction *autopopup; // for accessing state
00134   uint treshold;         // the required length of a word before popping up the completion list automatically
00135 };
00136 
00137 DocWordCompletionPluginView::DocWordCompletionPluginView( uint treshold, bool autopopup, KTextEditor::View *view, const char *name )
00138   : QObject( view, name ),
00139     KXMLGUIClient( view ),
00140     m_view( view ),
00141     d( new DocWordCompletionPluginViewPrivate )
00142 {
00143   d->treshold = treshold;
00144   view->insertChildClient( this );
00145   setInstance( KGenericFactory<DocWordCompletionPlugin>::instance() );
00146 
00147   (void) new KAction( i18n("Reuse Word Above"), CTRL+Key_8, this,
00148     SLOT(completeBackwards()), actionCollection(), "doccomplete_bw" );
00149   (void) new KAction( i18n("Reuse Word Below"), CTRL+Key_9, this,
00150     SLOT(completeForwards()), actionCollection(), "doccomplete_fw" );
00151   (void) new KAction( i18n("Pop Up Completion List"), 0, this,
00152     SLOT(popupCompletionList()), actionCollection(), "doccomplete_pu" );
00153   d->autopopup = new KToggleAction( i18n("Automatic Completion Popup"), 0, this,
00154     SLOT(toggleAutoPopup()), actionCollection(), "enable_autopopup" );
00155 
00156   d->autopopup->setChecked( autopopup );
00157   toggleAutoPopup();
00158 
00159   setXMLFile("docwordcompletionui.rc");
00160 
00161   KTextEditor::VariableInterface *vi = KTextEditor::variableInterface( view->document() );
00162   if ( vi )
00163   {
00164     QString e = vi->variable("wordcompletion-autopopup");
00165     if ( ! e.isEmpty() )
00166       d->autopopup->setEnabled( e == "true" );
00167 
00168     connect( view->document(), SIGNAL(variableChanged(const QString &, const QString &)),
00169              this, SLOT(slotVariableChanged(const QString &, const QString &)) );
00170   }
00171 }
00172 
00173 void DocWordCompletionPluginView::settreshold( uint t )
00174 {
00175   d->treshold = t;
00176 }
00177 
00178 void DocWordCompletionPluginView::completeBackwards()
00179 {
00180   complete( false );
00181 }
00182 
00183 void DocWordCompletionPluginView::completeForwards()
00184 {
00185   complete();
00186 }
00187 
00188 // Pop up the editors completion list if applicable
00189 void DocWordCompletionPluginView::popupCompletionList( QString w )
00190 {
00191   if ( w.isEmpty() )
00192     w = word();
00193   if ( w.isEmpty() )
00194     return;
00195 
00196   KTextEditor::CodeCompletionInterface *cci = codeCompletionInterface( m_view );
00197   cci->showCompletionBox( allMatches( w ), w.length() );
00198 }
00199 
00200 void DocWordCompletionPluginView::toggleAutoPopup()
00201 {
00202   if ( d->autopopup->isChecked() ) {
00203     if ( ! connect( m_view->document(), SIGNAL(charactersInteractivelyInserted(int ,int ,const QString&)),
00204          this, SLOT(autoPopupCompletionList()) ))
00205     {
00206       connect( m_view->document(), SIGNAL(textChanged()), this, SLOT(autoPopupCompletionList()) );
00207     }
00208   } else {
00209     disconnect( m_view->document(), SIGNAL(textChanged()), this, SLOT(autoPopupCompletionList()) );
00210     disconnect( m_view->document(), SIGNAL(charactersInteractivelyInserted(int ,int ,const QString&)),
00211                 this, SLOT(autoPopupCompletionList()) );
00212 
00213   }
00214 }
00215 
00216 // for autopopup FIXME - don't pop up if reuse word is inserting
00217 void DocWordCompletionPluginView::autoPopupCompletionList()
00218 {
00219   if ( ! m_view->hasFocus() ) return;
00220   QString w = word();
00221   if ( w.length() >= d->treshold )
00222   {
00223       popupCompletionList( w );
00224   }
00225 }
00226 
00227 // Do one completion, searching in the desired direction,
00228 // if possible
00229 void DocWordCompletionPluginView::complete( bool fw )
00230 {
00231   // setup
00232   KTextEditor::EditInterface *ei = KTextEditor::editInterface( m_view->document() );
00233   // find the word we are typing
00234   uint cline, ccol;
00235   viewCursorInterface( m_view )->cursorPositionReal( &cline, &ccol );
00236   QString wrd = word();
00237   if ( wrd.isEmpty() ) return;
00238 
00239   /* IF the current line is equal to the previous line
00240      AND the position - the length of the last inserted string
00241           is equal to the old position
00242      AND the lastinsertedlength last characters of the word is
00243           equal to the last inserted string
00244           */
00245   if ( cline == d-> cline &&
00246           ccol - d->lilen == d->ccol &&
00247           wrd.endsWith( d->lastIns ) )
00248   {
00249     // this is a repeted activation
00250     ccol = d->ccol;
00251     wrd = d->last;
00252   }
00253   else
00254   {
00255     d->cline = cline;
00256     d->ccol = ccol;
00257     d->last = wrd;
00258     d->lastIns = QString::null;
00259     d->line = d->cline;
00260     d->col = d->ccol - wrd.length();
00261     d->lilen = 0;
00262   }
00263 
00264   d->re.setPattern( "\\b" + wrd + "(\\w+)" );
00265   int inc = fw ? 1 : -1;
00266   int pos ( 0 );
00267   QString ln = ei->textLine( d->line );
00268 
00269   if ( ! fw )
00270     ln = ln.mid( 0, d->col );
00271 
00272   while ( true )
00273   {
00274     pos = fw ?
00275       d->re.search( ln, d->col ) :
00276       d->re.searchRev( ln, d->col );
00277 
00278     if ( pos > -1 ) // we matched a word
00279     {
00280       QString m = d->re.cap( 1 );
00281       if ( m != d->lastIns )
00282       {
00283         // we got good a match! replace text and return.
00284         if ( d->lilen )
00285           ei->removeText( d->cline, d->ccol, d->cline, d->ccol + d->lilen );
00286         ei->insertText( d->cline, d->ccol, m );
00287 
00288         d->lastIns = m;
00289         d->lilen = m.length();
00290         d->col = pos; // for next try
00291 
00292         if ( fw )
00293           d->col += m.length();
00294 
00295         return;
00296       }
00297 
00298       // equal to last one, continue
00299       else
00300       {
00301         d->col = pos; // for next try
00302         if ( fw )
00303           d->col += m.length();
00304         else // FIXME figure out if all of that is really nessecary
00305         {
00306           if ( pos == 0 )
00307           {
00308             if ( d->line > 0 )
00309             {
00310               d->line += inc;
00311               ln = ei->textLine( d->line );
00312               d->col = ln.length();
00313             }
00314             else
00315             {
00316               KNotifyClient::beep();
00317               return;
00318             }
00319           }
00320           else
00321             d->col--;
00322         }
00323       }
00324     }
00325 
00326     else  // no match
00327     {
00328       if ( ! fw && d->line == 0)
00329       {
00330         KNotifyClient::beep();
00331         return;
00332       }
00333       else if ( fw && d->line >= ei->numLines() )
00334       {
00335         KNotifyClient::beep();
00336         return;
00337       }
00338 
00339       d->line += inc;
00340       if ( fw )
00341         d->col++;
00342 
00343       ln = ei->textLine( d->line );
00344       d->col = fw ? 0 : ln.length();
00345     }
00346   } // while true
00347 }
00348 
00349 // Return the string to complete (the letters behind the cursor)
00350 QString DocWordCompletionPluginView::word()
00351 {
00352   uint cline, ccol;
00353   viewCursorInterface( m_view )->cursorPositionReal( &cline, &ccol );
00354   if ( ! ccol ) return QString::null; // no word
00355   KTextEditor::EditInterface *ei = KTextEditor::editInterface( m_view->document() );
00356   d->re.setPattern( "\\b(\\w+)$" );
00357   if ( d->re.searchRev(
00358         ei->text( cline, 0, cline, ccol )
00359         ) < 0 )
00360     return QString::null; // no word
00361   return d->re.cap( 1 );
00362 }
00363 
00364 // Scan throught the entire document for possible completions,
00365 // ignoring any dublets
00366 QValueList<KTextEditor::CompletionEntry> DocWordCompletionPluginView::allMatches( const QString &word )
00367 {
00368   QValueList<KTextEditor::CompletionEntry> l;
00369   uint i( 0 );
00370   int pos( 0 );
00371   d->re.setPattern( "\\b("+word+"\\w+)" );
00372   QString s, m;
00373   KTextEditor::EditInterface *ei = KTextEditor::editInterface( m_view->document() );
00374   QDict<int> seen; // maybe slow with > 17 matches
00375   int sawit(1);    // to ref for the dict
00376 
00377   while( i < ei->numLines() )
00378   {
00379     s = ei->textLine( i );
00380     pos = 0;
00381     while ( pos >= 0 )
00382     {
00383       pos = d->re.search( s, pos );
00384       if ( pos >= 0 )
00385       {
00386         m = d->re.cap( 1 );
00387         if ( ! seen[ m ] ) {
00388           seen.insert( m, &sawit );
00389           KTextEditor::CompletionEntry e;
00390           e.text = m;
00391           l.append( e );
00392         }
00393         pos += d->re.matchedLength();
00394       }
00395     }
00396     i++;
00397   }
00398   return l;
00399 }
00400 
00401 void DocWordCompletionPluginView::slotVariableChanged( const QString &var, const QString &val )
00402 {
00403   if ( var == "wordcompletion-autopopup" )
00404     d->autopopup->setEnabled( val == "true" );
00405   else if ( var == "wordcompletion-treshold" )
00406     d->treshold = val.toInt();
00407 }
00408 //END
00409 
00410 //BEGIN DocWordCompletionConfigPage
00411 DocWordCompletionConfigPage::DocWordCompletionConfigPage( DocWordCompletionPlugin *completion, QWidget *parent, const char *name )
00412   : KTextEditor::ConfigPage( parent, name )
00413   , m_completion( completion )
00414 {
00415   QVBoxLayout *lo = new QVBoxLayout( this );
00416   lo->setSpacing( KDialog::spacingHint() );
00417 
00418   cbAutoPopup = new QCheckBox( i18n("Automatically &show completion list"), this );
00419   lo->addWidget( cbAutoPopup );
00420 
00421   QHBox *hb = new QHBox( this );
00422   hb->setSpacing( KDialog::spacingHint() );
00423   lo->addWidget( hb );
00424   QLabel *l = new QLabel( i18n(
00425       "Translators: This is the first part of two strings wich will comprise the "
00426       "sentence 'Show completions when a word is at least N characters'. The first "
00427       "part is on the right side of the N, which is represented by a spinbox "
00428       "widget, followed by the second part: 'characters long'. Characters is a "
00429       "ingeger number between and including 1 and 30. Feel free to leave the "
00430       "second part of the sentence blank if it suits your language better. ",
00431       "Show completions &when a word is at least"), hb );
00432   sbAutoPopup = new QSpinBox( 1, 30, 1, hb );
00433   l->setBuddy( sbAutoPopup );
00434   lSbRight = new QLabel( i18n(
00435       "This is the second part of two strings that will comprise teh sentence "
00436       "'Show completions when a word is at least N characters'",
00437       "characters long."), hb );
00438 
00439   QWhatsThis::add( cbAutoPopup, i18n(
00440       "Enable the automatic completion list popup as default. The popup can "
00441       "be disabled on a view basis from the 'Tools' menu.") );
00442   QWhatsThis::add( sbAutoPopup, i18n(
00443       "Define the length a word should have before the completion list "
00444       "is displayed.") );
00445 
00446   cbAutoPopup->setChecked( m_completion->autoPopupEnabled() );
00447   sbAutoPopup->setValue( m_completion->treshold() );
00448 
00449   lo->addStretch();
00450 }
00451 
00452 void DocWordCompletionConfigPage::apply()
00453 {
00454   m_completion->setAutoPopupEnabled( cbAutoPopup->isChecked() );
00455   m_completion->setTreshold( sbAutoPopup->value() );
00456   m_completion->writeConfig();
00457 }
00458 
00459 void DocWordCompletionConfigPage::reset()
00460 {
00461   cbAutoPopup->setChecked( m_completion->autoPopupEnabled() );
00462   sbAutoPopup->setValue( m_completion->treshold() );
00463 }
00464 
00465 void DocWordCompletionConfigPage::defaults()
00466 {
00467   cbAutoPopup->setChecked( true );
00468   sbAutoPopup->setValue( 3 );
00469 }
00470 
00471 //END DocWordCompletionConfigPage
00472 
00473 #include "docwordcompletion.moc"
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