render_form.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

    if(m_useListBox)
        setQWidget(createListBox());
    else
        setQWidget(createComboBox());
}

void RenderSelect::updateFromElement()
{
    m_ignoreSelectEvents = true;

    // change widget type
    bool oldMultiple = m_multiple;
    unsigned oldSize = m_size;
    bool oldListbox = m_useListBox;

    m_multiple = element()->multiple();
    m_size = element()->size();
    m_useListBox = (m_multiple || m_size > 1);

    if (oldMultiple != m_multiple || oldSize != m_size) {
        if (m_useListBox != oldListbox) {
            // type of select has changed
            if(m_useListBox)
                setQWidget(createListBox());
            else
                setQWidget(createComboBox());
        }

        if (m_useListBox && oldMultiple != m_multiple) {
            static_cast<KListBox*>(m_widget)->setSelectionMode(m_multiple ? QListBox::Extended : QListBox::Single);
        }
        m_selectionChanged = true;
        m_optionsChanged = true;
    }

    // update contents listbox/combobox based on options in m_element
    if ( m_optionsChanged ) {
        if (element()->m_recalcListItems)
            element()->recalcListItems();
        QMemArray<HTMLGenericFormElementImpl*> listItems = element()->listItems();
        int listIndex;

        if(m_useListBox) {
            static_cast<KListBox*>(m_widget)->clear();
        }

        else
            static_cast<KComboBox*>(m_widget)->clear();

        for (listIndex = 0; listIndex < int(listItems.size()); listIndex++) {
            if (listItems[listIndex]->id() == ID_OPTGROUP) {
                DOMString text = listItems[listIndex]->getAttribute(ATTR_LABEL);
                if (text.isNull())
                    text = "";

                if(m_useListBox) {
                    QListBoxText *item = new QListBoxText(QString(text.implementation()->s, text.implementation()->l));
                    static_cast<KListBox*>(m_widget)
                        ->insertItem(item, listIndex);
                    item->setSelectable(false);
                }
                else {
                    static_cast<KComboBox*>(m_widget)
                        ->insertItem(QString(text.implementation()->s, text.implementation()->l), listIndex);
		    static_cast<KComboBox*>(m_widget)->listBox()->item(listIndex)->setSelectable(false);
		}
            }
            else if (listItems[listIndex]->id() == ID_OPTION) {
                HTMLOptionElementImpl* optElem = static_cast<HTMLOptionElementImpl*>(listItems[listIndex]);
                QString text = optElem->text().string();
                if (optElem->parentNode()->id() == ID_OPTGROUP)
                {
                    // Prefer label if set
                    DOMString label = optElem->getAttribute(ATTR_LABEL);
                    if (!label.isEmpty())
                        text = label.string();
                    text = QString::fromLatin1("    ")+text;
                }

                if(m_useListBox) {
                    KListBox *l = static_cast<KListBox*>(m_widget);
                    l->insertItem(text, listIndex);
                    DOMString disabled = optElem->getAttribute(ATTR_DISABLED);
                    if (!disabled.isNull() && l->item( listIndex )) {
                        l->item( listIndex )->setSelectable( false );
                    }
                }  else
                    static_cast<KComboBox*>(m_widget)->insertItem(text, listIndex);
            }
            else
                KHTMLAssert(false);
            m_selectionChanged = true;
        }

        // QComboBox caches the size hint unless you call setFont (ref: TT docu)
        if(!m_useListBox) {
            KComboBox *that = static_cast<KComboBox*>(m_widget);
            that->setFont( that->font() );
        }
        setNeedsLayoutAndMinMaxRecalc();
        m_optionsChanged = false;
    }

    // update selection
    if (m_selectionChanged) {
        updateSelection();
    }


    m_ignoreSelectEvents = false;

    RenderFormElement::updateFromElement();
}

void RenderSelect::calcMinMaxWidth()
{
    KHTMLAssert( !minMaxKnown() );

    if (m_optionsChanged)
        updateFromElement();

    // ### ugly HACK FIXME!!!
    setMinMaxKnown();
    layoutIfNeeded();
    setNeedsLayoutAndMinMaxRecalc();
    // ### end FIXME

    RenderFormElement::calcMinMaxWidth();
}

void RenderSelect::layout( )
{
    KHTMLAssert(needsLayout());
    KHTMLAssert(minMaxKnown());

    // ### maintain selection properly between type/size changes, and work
    // out how to handle multiselect->singleselect (probably just select
    // first selected one)

    // calculate size
    if(m_useListBox) {
        KListBox* w = static_cast<KListBox*>(m_widget);

        QListBoxItem* p = w->firstItem();
        int width = 0;
        int height = 0;
        while(p) {
            width = kMax(width, p->width(p->listBox()));
            height = kMax(height, p->height(p->listBox()));
            p = p->next();
        }
        if ( !height )
            height = w->fontMetrics().height();
        if ( !width )
            width = w->fontMetrics().width( 'x' );

        int size = m_size;
        // check if multiple and size was not given or invalid
        // Internet Exploder sets size to kMin(number of elements, 4)
        // Netscape seems to simply set it to "number of elements"
        // the average of that is IMHO kMin(number of elements, 10)
        // so I did that ;-)
        if(size < 1)
            size = kMin(static_cast<KListBox*>(m_widget)->count(), 10u);

        width += 2*w->frameWidth() + w->verticalScrollBar()->sizeHint().width();
        height = size*height + 2*w->frameWidth();

        setIntrinsicWidth( width );
        setIntrinsicHeight( height );
    }
    else {
        QSize s(m_widget->sizeHint());
        setIntrinsicWidth( s.width() );
        setIntrinsicHeight( s.height() );
    }

    /// uuh, ignore the following line..
    setNeedsLayout(true);
    RenderFormElement::layout();

    // and now disable the widget in case there is no <option> given
    QMemArray<HTMLGenericFormElementImpl*> listItems = element()->listItems();

    bool foundOption = false;
    for (uint i = 0; i < listItems.size() && !foundOption; i++)
	foundOption = (listItems[i]->id() == ID_OPTION);

    m_widget->setEnabled(foundOption && ! element()->disabled());
}

void RenderSelect::slotSelected(int index) // emitted by the combobox only
{
    if ( m_ignoreSelectEvents ) return;

    KHTMLAssert( !m_useListBox );

    QMemArray<HTMLGenericFormElementImpl*> listItems = element()->listItems();
    if(index >= 0 && index < int(listItems.size()))
    {
        bool found = ( listItems[index]->id() == ID_OPTION );

        if ( !found ) {
            // this one is not selectable,  we need to find an option element
            while ( ( unsigned ) index < listItems.size() ) {
                if ( listItems[index]->id() == ID_OPTION ) {
                    found = true;
                    break;
                }
                ++index;
            }

            if ( !found ) {
                while ( index >= 0 ) {
                    if ( listItems[index]->id() == ID_OPTION ) {
                        found = true;
                        break;
                    }
                    --index;
                }
            }
        }

        if ( found ) {
            bool changed = false;

            for ( unsigned int i = 0; i < listItems.size(); ++i )
                if ( listItems[i]->id() == ID_OPTION && i != (unsigned int) index )
                {
                    HTMLOptionElementImpl* opt = static_cast<HTMLOptionElementImpl*>( listItems[i] );
                    changed |= (opt->m_selected == true);
                    opt->m_selected = false;
                }

            HTMLOptionElementImpl* opt = static_cast<HTMLOptionElementImpl*>(listItems[index]);
            changed |= (opt->m_selected == false);
            opt->m_selected = true;

            if ( index != static_cast<ComboBoxWidget*>( m_widget )->currentItem() )
                static_cast<ComboBoxWidget*>( m_widget )->setCurrentItem( index );

            // When selecting an optgroup item, and we move forward to we
            // shouldn't emit onChange. Hence this bool, the if above doesn't do it.
            if ( changed )
            {
		ref();
                element()->onChange();
                deref();
            }
        }
    }
}


void RenderSelect::slotSelectionChanged() // emitted by the listbox only
{
    if ( m_ignoreSelectEvents ) return;

    // don't use listItems() here as we have to avoid recalculations - changing the
    // option list will make use update options not in the way the user expects them
    QMemArray<HTMLGenericFormElementImpl*> listItems = element()->m_listItems;
    for ( unsigned i = 0; i < listItems.count(); i++ )
        // don't use setSelected() here because it will cause us to be called
        // again with updateSelection.
        if ( listItems[i]->id() == ID_OPTION )
            static_cast<HTMLOptionElementImpl*>( listItems[i] )
                ->m_selected = static_cast<KListBox*>( m_widget )->isSelected( i );

    ref();
    element()->onChange();
    deref();
}

void RenderSelect::setOptionsChanged(bool _optionsChanged)
{
    m_optionsChanged = _optionsChanged;
}

KListBox* RenderSelect::createListBox()
{
    KListBox *lb = new KListBox(view()->viewport(), "__khtml");
    lb->setSelectionMode(m_multiple ? QListBox::Extended : QListBox::Single);
    // ### looks broken
    //lb->setAutoMask(true);
    connect( lb, SIGNAL( selectionChanged() ), this, SLOT( slotSelectionChanged() ) );
//     connect( lb, SIGNAL( clicked( QListBoxItem * ) ), this, SLOT( slotClicked() ) );
    m_ignoreSelectEvents = false;
    lb->setMouseTracking(true);

    return lb;
}

ComboBoxWidget *RenderSelect::createComboBox()
{
    ComboBoxWidget *cb = new ComboBoxWidget(view()->viewport());
    connect(cb, SIGNAL(activated(int)), this, SLOT(slotSelected(int)));
    return cb;
}

void RenderSelect::updateSelection()
{
    QMemArray<HTMLGenericFormElementImpl*> listItems = element()->listItems();
    int i;
    if (m_useListBox) {
        // if multi-select, we select only the new selected index
        KListBox *listBox = static_cast<KListBox*>(m_widget);
        for (i = 0; i < int(listItems.size()); i++)
            listBox->setSelected(i,listItems[i]->id() == ID_OPTION &&
                                 static_cast<HTMLOptionElementImpl*>(listItems[i])->selected());
    }
    else {
        bool found = false;
        unsigned firstOption = listItems.size();
        i = listItems.size();
        while (i--)
            if (listItems[i]->id() == ID_OPTION) {
                if (found)
                    static_cast<HTMLOptionElementImpl*>(listItems[i])->m_selected = false;
                else if (static_cast<HTMLOptionElementImpl*>(listItems[i])->selected()) {
                    static_cast<KComboBox*>( m_widget )->setCurrentItem(i);
                    found = true;
                }
                firstOption = i;
            }

        Q_ASSERT(firstOption == listItems.size() || found);
    }

    m_selectionChanged = false;
}


// -------------------------------------------------------------------------

TextAreaWidget::TextAreaWidget(int wrap, QWidget* parent)
    : KTextEdit(parent, "__khtml"), m_findDlg(0), m_find(0), m_repDlg(0), m_replace(0)
{
    if(wrap != DOM::HTMLTextAreaElementImpl::ta_NoWrap) {
        setWordWrap(QTextEdit::WidgetWidth);
        setHScrollBarMode( AlwaysOff );
        setVScrollBarMode( AlwaysOn );
    }
    else {
        setWordWrap(QTextEdit::NoWrap);
        setHScrollBarMode( Auto );
        setVScrollBarMode( Auto );
    }
    KCursor::setAutoHideCursor(viewport(), true);
    setTextFormat(QTextEdit::PlainText);
    setAutoMask(true);
    setMouseTracking(true);

#ifndef KHTML_NO_SPELLING
    KActionCollection *ac = new KActionCollection(this);
    m_findAction = KStdAction::find( this, SLOT( slotFind() ), ac );
    m_findNextAction = KStdAction::findNext( this, SLOT( slotFindNext() ), ac );
    m_replaceAction = KStdAction::replace( this, SLOT( slotReplace() ), ac );
#endif // KHTML_NO_SPELLING
}


TextAreaWidget::~TextAreaWidget()
{
    delete m_replace;
    m_replace = 0L;
    delete m_find;
    m_find = 0L;
    delete m_repDlg;
    m_repDlg = 0L;
    delete m_findDlg;
    m_findDlg = 0L;
}


QPopupMenu *TextAreaWidget::createPopupMenu(const QPoint& pos)
{
    QPopupMenu *popup = KTextEdit::createPopupMenu(pos);

    if ( !popup ) {
        return 0L;
    }

#ifndef KHTML_NO_SPELLING
    if (!isReadOnly()) {
        popup->insertSeparator();

        m_findAction->plug(popup);
        m_findAction->setEnabled( !text().isEmpty() );

        m_findNextAction->plug(popup);
        m_findNextAction->setEnabled( m_find != 0 );

        m_replaceAction->plug(popup);
        m_replaceAction->setEnabled( !text().isEmpty() );
    }
#endif

    return popup;
}


void TextAreaWidget::slotFindHighlight(const QString& text, int matchingIndex, int matchingLength)
{
    Q_UNUSED(text)
    //kdDebug() << "Highlight: [" << text << "] mi:" << matchingIndex << " ml:" << matchingLength << endl;
    if (sender() == m_replace) {
        setSelection(m_repPara, matchingIndex, m_repPara, matchingIndex + matchingLength);
        setCursorPosition(m_repPara, matchingIndex);
    } else {
        setSelection(m_findPara, matchingIndex, m_findPara, matchingIndex + matchingLength);
        setCursorPosition(m_findPara, matchingIndex);
    }
    ensureCursorVisible();
}


void TextAreaWidget::slotReplaceText(const QString &text, int replacementIndex, int /*replacedLength*/, int matchedLength) {
#ifndef KHTML_NO_SPELLING
    Q_UNUSED(text)
    //kdDebug() << "Replace: [" << text << "] ri:" << replacementIndex << " rl:" << replacedLength << " ml:" << matchedLength << endl;
    setSelection(m_repPara, replacementIndex, m_repPara, replacementIndex + matchedLength);
    removeSelectedText();
    insertAt(m_repDlg->replacement(), m_repPara, replacementIndex);
    if (m_replace->options() & KReplaceDialog::PromptOnReplace) {
        ensureCursorVisible();
    }
#endif // KHTML_NO_SPELLING
}


void TextAreaWidget::slotDoReplace()
{
#ifndef KHTML_NO_SPELLING
    if (!m_repDlg) {
        // Should really assert()
        return;
    }

    delete m_replace;
    m_replace = new KReplace(m_repDlg->pattern(), m_repDlg->replacement(), m_repDlg->options(), this);
    if (m_replace->options() & KFindDialog::FromCursor) {
        getCursorPosition(&m_repPara, &m_repIndex);