1 files changed, 643 insertions, 0 deletions
diff --git a/lib/kformula/kformulacontainer.cc b/lib/kformula/kformulacontainer.cc
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+++ b/lib/kformula/kformulacontainer.cc
@@ -0,0 +1,643 @@
+/* This file is part of the KDE project
+   Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
+	              Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   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 <qapplication.h>
+#include <qdom.h>
+#include <qevent.h>
+#include <qfile.h>
+#include <qpainter.h>
+#include <qpixmap.h>
+#include <qstring.h>
+#include <qtextstream.h>
+
+#include <kdebug.h>
+#include <klocale.h>
+#include <kprinter.h>
+
+#include "KoGlobal.h"
+#include "bracketelement.h"
+#include "contextstyle.h"
+#include "formulacursor.h"
+#include "formulaelement.h"
+#include "fractionelement.h"
+#include "indexelement.h"
+#include "kformulacommand.h"
+#include "kformulacompatibility.h"
+#include "kformulacontainer.h"
+#include "kformuladocument.h"
+#include "kformulamathmlread.h"
+#include "kformulamimesource.h"
+#include "matrixelement.h"
+#include "rootelement.h"
+#include "sequenceelement.h"
+#include "symbolelement.h"
+#include "symboltable.h"
+#include "spaceelement.h"
+#include "textelement.h"
+
+#include <assert.h>
+
+KFORMULA_NAMESPACE_BEGIN
+using namespace std;
+
+
+struct Container::Container_Impl {
+
+    Container_Impl( Document* doc )
+            : dirty( true ), cursorMoved( false ), document( doc )
+    {
+    }
+
+    ~Container_Impl()
+    {
+        delete internCursor;
+        delete rootElement;
+        document = 0;
+    }
+
+    /**
+     * If true we need to recalc the formula.
+     */
+    bool dirty;
+
+    /**
+     * Tells whether a request caused the cursor to move.
+     */
+    bool cursorMoved;
+
+    /**
+     * The element tree's root.
+     */
+    FormulaElement* rootElement;
+
+    /**
+     * The active cursor is the one that triggered the last command.
+     */
+    FormulaCursor* activeCursor;
+
+    /**
+     * The cursor that is used if there is no view.
+     */
+    FormulaCursor* internCursor;
+
+    /**
+     * The document we belong to.
+     */
+    Document* document;
+};
+
+
+FormulaElement* Container::rootElement() const { return impl->rootElement; }
+Document* Container::document() const { return impl->document; }
+
+Container::Container( Document* doc, int pos, bool registerMe )
+{
+    impl = new Container_Impl( doc );
+    impl->rootElement = 0;
+    if ( registerMe ) {
+        registerFormula( pos );
+    }
+}
+
+Container::~Container()
+{
+    unregisterFormula();
+    delete impl;
+    impl = 0;
+}
+
+
+void Container::initialize()
+{
+    assert( impl->rootElement == 0 );
+    impl->rootElement = createMainSequence();
+    impl->activeCursor = impl->internCursor = createCursor();
+    recalc();
+}
+
+
+FormulaElement* Container::createMainSequence()
+{
+    return new FormulaElement( this );
+}
+
+
+FormulaCursor* Container::createCursor()
+{
+    return new FormulaCursor(rootElement());
+}
+
+
+KoCommandHistory* Container::getHistory() const
+{
+    return document()->getHistory();
+}
+
+
+/**
+ * Gets called just before the child is removed from
+ * the element tree.
+ */
+void Container::elementRemoval(BasicElement* child)
+{
+    emit elementWillVanish(child);
+}
+
+/**
+ * Gets called whenever something changes and we need to
+ * recalc.
+ */
+void Container::changed()
+{
+    impl->dirty = true;
+}
+
+void Container::cursorHasMoved( FormulaCursor* )
+{
+    impl->cursorMoved = true;
+}
+
+void Container::moveOutLeft( FormulaCursor* cursor )
+{
+    emit leaveFormula( this, cursor, EXIT_LEFT );
+}
+
+void Container::moveOutRight( FormulaCursor* cursor )
+{
+    emit leaveFormula( this, cursor, EXIT_RIGHT );
+}
+
+void Container::moveOutAbove( FormulaCursor* cursor )
+{
+    emit leaveFormula( this, cursor, EXIT_ABOVE );
+}
+
+void Container::moveOutBelow( FormulaCursor* cursor )
+{
+    emit leaveFormula( this, cursor, EXIT_BELOW );
+}
+
+void Container::tell( const QString& msg )
+{
+    emit statusMsg( msg );
+}
+
+void Container::removeFormula( FormulaCursor* cursor )
+{
+    emit leaveFormula( this, cursor, REMOVE_FORMULA );
+}
+
+
+void Container::registerFormula( int pos )
+{
+    document()->registerFormula( this, pos );
+}
+
+void Container::unregisterFormula()
+{
+    document()->unregisterFormula( this );
+}
+
+
+void Container::baseSizeChanged( int size, bool owned )
+{
+    if ( owned ) {
+        emit baseSizeChanged( size );
+    }
+    else {
+        const ContextStyle& context = document()->getContextStyle();
+        emit baseSizeChanged( context.baseSize() );
+    }
+}
+
+FormulaCursor* Container::activeCursor()
+{
+    return impl->activeCursor;
+}
+
+const FormulaCursor* Container::activeCursor() const
+{
+    return impl->activeCursor;
+}
+
+
+/**
+ * Tells the formula that a view got the focus and might want to
+ * edit the formula.
+ */
+void Container::setActiveCursor(FormulaCursor* cursor)
+{
+    document()->activate(this);
+    if (cursor != 0) {
+        impl->activeCursor = cursor;
+    }
+    else {
+        *(impl->internCursor) = *(impl->activeCursor);
+        impl->activeCursor = impl->internCursor;
+    }
+}
+
+
+bool Container::hasValidCursor() const
+{
+    return (impl->activeCursor != 0) && !impl->activeCursor->isReadOnly();
+}
+
+void Container::testDirty()
+{
+    if (impl->dirty) {
+        recalc();
+    }
+}
+
+void Container::recalc()
+{
+    impl->dirty = false;
+    ContextStyle& context = impl->document->getContextStyle();
+    rootElement()->calcSizes( context );
+
+    emit formulaChanged( context.layoutUnitToPixelX( rootElement()->getWidth() ),
+                         context.layoutUnitToPixelY( rootElement()->getHeight() ) );
+    emit formulaChanged( context.layoutUnitPtToPt( context.pixelXToPt( rootElement()->getWidth() ) ),
+                         context.layoutUnitPtToPt( context.pixelYToPt( rootElement()->getHeight() ) ) );
+    emit cursorMoved( activeCursor() );
+}
+
+bool Container::isEmpty()
+{
+    return rootElement()->countChildren() == 0;
+}
+
+
+const SymbolTable& Container::getSymbolTable() const
+{
+    return document()->getSymbolTable();
+}
+
+
+void Container::draw( QPainter& painter, const QRect& r, const QColorGroup& cg, bool edit )
+{
+    painter.fillRect( r, cg.base() );
+    draw( painter, r, edit );
+}
+
+
+void Container::draw( QPainter& painter, const QRect& r, bool edit )
+{
+    //ContextStyle& context = document()->getContextStyle( painter.device()->devType() == QInternal::Printer );
+    ContextStyle& context = document()->getContextStyle( edit );
+    rootElement()->draw( painter, context.pixelToLayoutUnit( r ), context );
+}
+
+
+void Container::checkCursor()
+{
+    if ( impl->cursorMoved ) {
+        impl->cursorMoved = false;
+        emit cursorMoved( activeCursor() );
+    }
+}
+
+void Container::input( QKeyEvent* event )
+{
+    //if ( !hasValidCursor() )
+    if ( impl->activeCursor == 0 ) {
+        return;
+    }
+    execute( activeCursor()->getElement()->input( this, event ) );
+    checkCursor();
+}
+
+
+void Container::performRequest( Request* request )
+{
+    if ( !hasValidCursor() )
+        return;
+    execute( activeCursor()->getElement()->buildCommand( this, request ) );
+    checkCursor();
+}
+
+
+void Container::paste()
+{
+    if (!hasValidCursor())
+        return;
+    QClipboard* clipboard = QApplication::clipboard();
+    const QMimeSource* source = clipboard->data();
+    if (source->provides( MimeSource::selectionMimeType() )) {
+        QByteArray data = source->encodedData( MimeSource::selectionMimeType() );
+        QDomDocument formula;
+        formula.setContent(data);
+        paste( formula, i18n("Paste") );
+    }
+}
+
+void Container::paste( const QDomDocument& document, QString desc )
+{
+    FormulaCursor* cursor = activeCursor();
+    QPtrList<BasicElement> list;
+    list.setAutoDelete( true );
+    if ( cursor->buildElementsFromMathMLDom( document.documentElement(), list ) ) {
+        uint count = list.count();
+        // You must not execute an add command that adds nothing.
+        if (count > 0) {
+            KFCReplace* command = new KFCReplace( desc, this );
+            for (uint i = 0; i < count; i++) {
+                command->addElement(list.take(0));
+            }
+            execute(command);
+        }
+    }
+}
+
+void Container::copy()
+{
+    // read-only cursors are fine for copying.
+    FormulaCursor* cursor = activeCursor();
+    if (cursor != 0) {
+        QDomDocument formula = document()->createMathMLDomDocument();
+        cursor->copy( formula );
+        QClipboard* clipboard = QApplication::clipboard();
+        clipboard->setData(new MimeSource(document(), formula));
+    }
+}
+
+void Container::cut()
+{
+    if (!hasValidCursor())
+        return;
+    FormulaCursor* cursor = activeCursor();
+    if (cursor->isSelection()) {
+        copy();
+        DirectedRemove r( req_remove, beforeCursor );
+        performRequest( &r );
+    }
+}
+
+
+void Container::emitErrorMsg( const QString& msg )
+{
+    emit errorMsg( msg );
+}
+
+void Container::execute(KCommand* command)
+{
+    if ( command != 0 ) {
+        getHistory()->addCommand(command);
+    }
+}
+
+
+QRect Container::boundingRect() const
+{
+    const ContextStyle& context = document()->getContextStyle();
+    return QRect( context.layoutUnitToPixelX( rootElement()->getX() ),
+                  context.layoutUnitToPixelY( rootElement()->getY() ),
+                  context.layoutUnitToPixelX( rootElement()->getWidth() ),
+                  context.layoutUnitToPixelY( rootElement()->getHeight() ) );
+}
+
+QRect Container::coveredRect()
+{
+    if ( impl->activeCursor != 0 ) {
+        const ContextStyle& context = document()->getContextStyle();
+        const LuPixelRect& cursorRect = impl->activeCursor->getCursorSize();
+        return QRect( context.layoutUnitToPixelX( rootElement()->getX() ),
+                      context.layoutUnitToPixelY( rootElement()->getY() ),
+                      context.layoutUnitToPixelX( rootElement()->getWidth() ),
+                      context.layoutUnitToPixelY( rootElement()->getHeight() ) ) |
+            QRect( context.layoutUnitToPixelX( cursorRect.x() ),
+                   context.layoutUnitToPixelY( cursorRect.y() ),
+                   context.layoutUnitToPixelX( cursorRect.width() ),
+                   context.layoutUnitToPixelY( cursorRect.height() ) );
+    }
+    return boundingRect();
+}
+
+double Container::width() const
+{
+    const ContextStyle& context = document()->getContextStyle();
+    return context.layoutUnitPtToPt( context.pixelXToPt( rootElement()->getWidth() ) );
+}
+
+double Container::height() const
+{
+    const ContextStyle& context = document()->getContextStyle();
+    return context.layoutUnitPtToPt( context.pixelYToPt( rootElement()->getHeight() ) );
+}
+
+double Container::baseline() const
+{
+    const ContextStyle& context = document()->getContextStyle();
+    //return context.layoutUnitToPixelY( rootElement()->getBaseline() );
+    return context.layoutUnitPtToPt( context.pixelYToPt( rootElement()->getBaseline() ) );
+}
+
+void Container::moveTo( int x, int y )
+{
+    const ContextStyle& context = document()->getContextStyle();
+    rootElement()->setX( context.pixelToLayoutUnitX( x ) );
+    rootElement()->setY( context.pixelToLayoutUnitY( y ) );
+}
+
+int Container::fontSize() const
+{
+    if ( rootElement()->hasOwnBaseSize() ) {
+        return rootElement()->getBaseSize();
+    }
+    else {
+        const ContextStyle& context = document()->getContextStyle();
+        return qRound( context.baseSize() );
+    }
+}
+
+void Container::setFontSize( int pointSize, bool /*forPrint*/ )
+{
+    if ( rootElement()->getBaseSize() != pointSize ) {
+        execute( new KFCChangeBaseSize( i18n( "Base Size Change" ), this, rootElement(), pointSize ) );
+    }
+}
+
+void Container::setFontSizeDirect( int pointSize )
+{
+    rootElement()->setBaseSize( pointSize );
+    recalc();
+}
+
+void Container::updateMatrixActions()
+{
+    BasicElement *currentElement = activeCursor()->getElement();
+    if ( ( currentElement = currentElement->getParent() ) != 0 )
+        document()->wrapper()->enableMatrixActions( dynamic_cast<MatrixElement*>(currentElement) );
+    else
+        document()->wrapper()->enableMatrixActions( false );
+}
+
+void Container::save( QDomElement &root )
+{
+    QDomDocument ownerDoc = root.ownerDocument();
+    root.appendChild(rootElement()->getElementDom(ownerDoc));
+}
+
+
+/**
+ * Loads a formula from the document.
+ */
+bool Container::load( const QDomElement &fe )
+{
+    if (!fe.isNull()) {
+        FormulaElement* root = createMainSequence();
+        if (root->buildFromDom(fe)) {
+            delete impl->rootElement;
+            impl->rootElement = root;
+            emit formulaLoaded(rootElement());
+
+            recalc();
+            return true;
+        }
+        else {
+            delete root;
+            kdWarning( DEBUGID ) << "Error constructing element tree." << endl;
+        }
+    }
+    else {
+        kdWarning( DEBUGID ) << "Empty element." << endl;
+    }
+    return false;
+}
+
+
+void Container::saveMathML( QTextStream& stream, bool oasisFormat )
+{
+    QDomDocument doc;
+    if ( !oasisFormat ) {
+        doc = document()->createMathMLDomDocument(); 
+   }
+    rootElement()->writeMathML( doc, doc, oasisFormat );
+    stream << doc;
+}
+
+bool Container::loadMathML( const QDomDocument &doc, bool oasisFormat )
+{
+    return loadMathML( doc.documentElement(), oasisFormat );
+}
+
+/*
+bool Container::loadMathML( const QDomElement &element, bool oasisFormat )
+{
+    const ContextStyle& context = document()->getContextStyle();
+    MathML2KFormula filter( element, context, oasisFormat );
+    filter.startConversion();
+    if (filter.m_error) {
+        return false;
+    }
+
+    if ( load( filter.getKFormulaDom().documentElement() ) ) {
+        getHistory()->clear();
+        return true;
+    }
+    return false;
+}
+*/
+
+bool Container::loadMathML( const QDomElement &fe, bool /*oasisFormat*/ )
+{
+    kdDebug( DEBUGID ) << "loadMathML" << endl;
+    if (!fe.isNull()) {
+        FormulaElement* root = createMainSequence();
+        if ( root->buildFromMathMLDom( fe ) != - 1) {
+            delete impl->rootElement;
+            impl->rootElement = root;
+            emit formulaLoaded(rootElement());
+
+            recalc();
+            return true;
+        }
+        else {
+            delete root;
+            kdWarning( DEBUGID ) << "Error constructing element tree." << endl;
+        }
+    }
+    else {
+        kdWarning( DEBUGID ) << "Empty element." << endl;
+    }
+    return false;
+}
+
+
+void Container::print(KPrinter& printer)
+{
+    //printer.setFullPage(true);
+    QPainter painter;
+    if (painter.begin(&printer)) {
+        rootElement()->draw( painter, LuPixelRect( rootElement()->getX(),
+                                                   rootElement()->getY(),
+                                                   rootElement()->getWidth(),
+                                                   rootElement()->getHeight() ),
+                             document()->getContextStyle( false ) );
+    }
+}
+
+QImage Container::drawImage( int width, int height )
+{
+    ContextStyle& context = document()->getContextStyle( false );
+    QRect rect(impl->rootElement->getX(), impl->rootElement->getY(),
+               impl->rootElement->getWidth(), impl->rootElement->getHeight());
+
+    int realWidth = context.layoutUnitToPixelX( impl->rootElement->getWidth() );
+    int realHeight = context.layoutUnitToPixelY( impl->rootElement->getHeight() );
+
+    double f = QMAX( static_cast<double>( width )/static_cast<double>( realWidth ),
+                     static_cast<double>( height )/static_cast<double>( realHeight ) );
+
+    int oldZoom = context.zoom();
+    context.setZoomAndResolution( qRound( oldZoom*f ), KoGlobal::dpiX(), KoGlobal::dpiY() );
+
+    kdDebug( DEBUGID ) << "Container::drawImage "
+                       << "(" << width << " " << height << ")"
+                       << "(" << context.layoutUnitToPixelX( impl->rootElement->getWidth() )
+                       << " " << context.layoutUnitToPixelY( impl->rootElement->getHeight() ) << ")"
+                       << endl;
+
+    QPixmap pm( context.layoutUnitToPixelX( impl->rootElement->getWidth() ),
+                context.layoutUnitToPixelY( impl->rootElement->getHeight() ) );
+    pm.fill();
+    QPainter paint(&pm);
+    impl->rootElement->draw(paint, rect, context);
+    paint.end();
+    context.setZoomAndResolution( oldZoom, KoGlobal::dpiX(), KoGlobal::dpiY() );
+    //return pm.convertToImage().smoothScale( width, height );
+    return pm.convertToImage();
+}
+
+QString Container::texString()
+{
+    return rootElement()->toLatex();
+}
+
+QString Container::formulaString()
+{
+    return rootElement()->formulaString();
+}
+
+KFORMULA_NAMESPACE_END
+
+using namespace KFormula;
+#include "kformulacontainer.moc"