render_form.cpp

khtml在gtk上的移植版本

#if APPLE_CHANGES

void RenderSubmitButton::setStyle(RenderStyle *s)
{
    RenderButton::setStyle(s);
    
    QPushButton *w = static_cast<QPushButton*>(m_widget);
    w->setWritingDirection(style()->direction() == RTL ? QPainter::RTL : QPainter::LTR);
}

#endif

void RenderSubmitButton::updateFromElement()
{
    QPushButton *w = static_cast<QPushButton*>(m_widget);

    QString oldText = w->text();
    QString newText = rawText();
    w->setText(newText);
    if ( oldText != newText )
        setNeedsLayoutAndMinMaxRecalc();
    RenderFormElement::updateFromElement();
}

QString RenderSubmitButton::defaultLabel()
{
#if APPLE_CHANGES
    return submitButtonDefaultLabel();
#else
    return i18n("Submit");
#endif
}

short RenderSubmitButton::baselinePosition( bool f, bool isRootLineBox ) const
{
    return RenderFormElement::baselinePosition( f, isRootLineBox );
}

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

RenderImageButton::RenderImageButton(HTMLInputElementImpl *element)
    : RenderImage(element)
{
    // ### support DOMActivate event when clicked
}

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

RenderResetButton::RenderResetButton(HTMLInputElementImpl *element)
    : RenderSubmitButton(element)
{
}

QString RenderResetButton::defaultLabel()
{
#if APPLE_CHANGES
    return resetButtonDefaultLabel();
#else
    return i18n("Reset");
#endif
}


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

RenderPushButton::RenderPushButton(HTMLInputElementImpl *element)
    : RenderSubmitButton(element)
{
}

QString RenderPushButton::defaultLabel()
{
    return QString::null;
}

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

#if !APPLE_CHANGES

LineEditWidget::LineEditWidget(QWidget *parent)
        : KLineEdit(parent)
{
    setMouseTracking(true);
}

bool LineEditWidget::event( QEvent *e )
{
    if ( e->type() == QEvent::AccelAvailable && isReadOnly() ) {
        QKeyEvent* ke = (QKeyEvent*) e;
        if ( ke->state() & ControlButton ) {
            switch ( ke->key() ) {
                case Key_Left:
                case Key_Right:
                case Key_Up:
                case Key_Down:
                case Key_Home:
                case Key_End:
                    ke->accept();
                default:
                break;
            }
        }
    }
    return KLineEdit::event( e );
}

#endif

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

RenderLineEdit::RenderLineEdit(HTMLInputElementImpl *element)
    : RenderFormElement(element), m_updating(false)
{
#if KWIQ
    QOBJECT_TYPE(RenderLineEdit);
#endif
#if APPLE_CHANGES
    QLineEdit::Type type;
    switch (element->inputType()) {
        case HTMLInputElementImpl::PASSWORD:
            type = QLineEdit::Password;
            break;
        case HTMLInputElementImpl::SEARCH:
            type = QLineEdit::Search;
            break;
        default:
            type = QLineEdit::Normal;
    }
    KLineEdit *edit = new KLineEdit(type);
    if (type == QLineEdit::Search)
        edit->setLiveSearch(false);
#else
    LineEditWidget *edit = new LineEditWidget(view()->viewport());
#endif
    connect(edit,SIGNAL(returnPressed()), this, SLOT(slotReturnPressed()));
    connect(edit,SIGNAL(textChanged(const QString &)),this,SLOT(slotTextChanged(const QString &)));
    connect(edit,SIGNAL(clicked()),this,SLOT(slotClicked()));

#if APPLE_CHANGES
    connect(edit,SIGNAL(performSearch()), this, SLOT(slotPerformSearch()));
#endif

#if !APPLE_CHANGES
    if(element->inputType() == HTMLInputElementImpl::PASSWORD)
        edit->setEchoMode( QLineEdit::Password );

    if ( element->autoComplete() ) {
        QStringList completions = view()->formCompletionItems(element->name().string());
        if (completions.count()) {
            edit->completionObject()->setItems(completions);
            edit->setContextMenuEnabled(true);
        }
    }
#endif

    setQWidget(edit);
}

void RenderLineEdit::slotReturnPressed()
{
#if !APPLE_CHANGES
    // don't submit the form when return was pressed in a completion-popup
    KCompletionBox *box = widget()->completionBox(false);
    if ( box && box->isVisible() && box->currentItem() != -1 )
	return;
#endif

    // Emit onChange if necessary
    // Works but might not be enough, dirk said he had another solution at
    // hand (can't remember which) - David
    handleFocusOut();

    HTMLFormElementImpl* fe = element()->form();
    if ( fe )
        fe->submitClick();
}

#if APPLE_CHANGES
void RenderLineEdit::slotPerformSearch()
{
    // Fire the "search" DOM event.
    element()->dispatchHTMLEvent(EventImpl::SEARCH_EVENT, true, false);
}

void RenderLineEdit::addSearchResult()
{
    if (widget())
        widget()->addSearchResult();
}
#endif

void RenderLineEdit::handleFocusOut()
{
    if ( widget() && widget()->edited() ) {
        element()->onChange();
        widget()->setEdited( false );
    }
}

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

#if APPLE_CHANGES
    // Let the widget tell us how big it wants to be.
    m_updating = true;
    int size = element()->size();
    QSize s(widget()->sizeForCharacterWidth(size > 0 ? size : 20));
    m_updating = false;
#else
    const QFontMetrics &fm = style()->fontMetrics();
    QSize s;

    int size = element()->size();

    int h = fm.lineSpacing();
    int w = fm.width( 'x' ) * (size > 0 ? size : 17); // "some"
    s = QSize(w + 2 + 2*widget()->frameWidth(),
              QMAX(h, 14) + 2 + 2*widget()->frameWidth())
        .expandedTo(QApplication::globalStrut());
#endif

    setIntrinsicWidth( s.width() );
    setIntrinsicHeight( s.height() );

    RenderFormElement::calcMinMaxWidth();
}

void RenderLineEdit::setStyle(RenderStyle *s)
{
    RenderFormElement::setStyle(s);

    KLineEdit *w = widget();
    w->setAlignment(textAlignment());
#if APPLE_CHANGES
    w->setWritingDirection(style()->direction() == RTL ? QPainter::RTL : QPainter::LTR);
#endif
}

void RenderLineEdit::updateFromElement()
{
    KLineEdit *w = widget();
    
    int ml = element()->maxLength();
    if ( ml <= 0 || ml > 1024 )
        ml = 1024;
    if ( w->maxLength() != ml )
        w->setMaxLength( ml );

    // Call w->text() before calling element()->value(), because in the case of inline
    // input such as Hiragana, w->text() has a side effect of sending the notification
    // that we use in slotTextChanged to update element()->m_value
    QString widgetText = w->text();
    QString newText = element()->value().string();
    newText.replace('\\', backslashAsCurrencySymbol());

    if (newText != widgetText) {
        w->blockSignals(true);
        int pos = w->cursorPosition();

        m_updating = true;
        w->setText(newText);
        m_updating = false;
        
        w->setEdited( false );

        w->setCursorPosition(pos);
        w->blockSignals(false);
    }
    w->setReadOnly(element()->readOnly());
    
#if APPLE_CHANGES
    // Handle updating the search attributes.
    if (w->type() == QLineEdit::Search) {
        w->setLiveSearch(!element()->getAttribute(ATTR_INCREMENTAL).isNull());
        w->setAutoSaveName(element()->getAttribute(ATTR_AUTOSAVE).string());
        w->setMaxResults(element()->maxResults());
        w->setPlaceholderString(element()->getAttribute(ATTR_PLACEHOLDER).string());
    }
#endif

    RenderFormElement::updateFromElement();
}

void RenderLineEdit::slotTextChanged(const QString &string)
{
    // don't use setValue here!
    if (m_updating) // Don't alter m_value if we are in the middle of initing the control, since
        return;     // we may have gotten our initial value from the attribute.

    // A null string value is used to indicate that the form control has not altered the original
    // default value.  That means that we should never use the null string value when the user
    // empties a textfield, but should always force an empty textfield to use the empty string.
    QString newText = string.isNull() ? "" : string;
    newText.replace(backslashAsCurrencySymbol(), '\\');
    element()->m_value = newText;
    
    // Fire the "input" DOM event.
    element()->dispatchHTMLEvent(EventImpl::INPUT_EVENT, true, false);
}

void RenderLineEdit::select()
{
    static_cast<KLineEdit*>(m_widget)->selectAll();
}

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

RenderFieldset::RenderFieldset(HTMLGenericFormElementImpl *element)
: RenderBlock(element)
{
}

RenderObject* RenderFieldset::layoutLegend(bool relayoutChildren)
{
    RenderObject* legend = findLegend();
    if (legend) {
        if (relayoutChildren)
            legend->setNeedsLayout(true);
        legend->layoutIfNeeded();

        int xPos = borderLeft() + paddingLeft() + legend->marginLeft();
        if (style()->direction() == RTL)
            xPos = m_width - paddingRight() - borderRight() - legend->width() - legend->marginRight();
        int b = borderTop();
        int h = legend->height();
        legend->setPos(xPos, QMAX((b-h)/2, 0));
        m_height = QMAX(b,h) + paddingTop();
    }
    return legend;
}

RenderObject* RenderFieldset::findLegend()
{
    for (RenderObject* legend = firstChild(); legend; legend = legend->nextSibling()) {
      if (!legend->isFloatingOrPositioned() && legend->element() &&
          legend->element()->id() == ID_LEGEND)
        return legend;
    }
    return 0;
}

void RenderFieldset::paintBoxDecorations(PaintInfo& i, int _tx, int _ty)
{
    //kdDebug( 6040 ) << renderName() << "::paintDecorations()" << endl;

    int w = width();
    int h = height() + borderTopExtra() + borderBottomExtra();
    RenderObject* legend = findLegend();
    if (!legend)
        return RenderBlock::paintBoxDecorations(i, _tx, _ty);

    int yOff = (legend->yPos() > 0) ? 0 : (legend->height()-borderTop())/2;
    h -= yOff;
    _ty += yOff - borderTopExtra();

    int my = kMax(_ty, i.r.y());
    int end = kMin(i.r.y() + i.r.height(),  _ty + h);
    int mh = end - my;

    paintBackground(i.p, style()->backgroundColor(), style()->backgroundImage(), my, mh, _tx, _ty, w, h);

    if (style()->hasBorder())
        paintBorderMinusLegend(i.p, _tx, _ty, w, h, style(), legend->xPos(), legend->width());
}

void RenderFieldset::paintBorderMinusLegend(QPainter *p, int _tx, int _ty, int w, int h,
                                            const RenderStyle* style, int lx, int lw)
{

    const QColor& tc = style->borderTopColor();
    const QColor& bc = style->borderBottomColor();

    EBorderStyle ts = style->borderTopStyle();
    EBorderStyle bs = style->borderBottomStyle();
    EBorderStyle ls = style->borderLeftStyle();
    EBorderStyle rs = style->borderRightStyle();

    bool render_t = ts > BHIDDEN;
    bool render_l = ls > BHIDDEN;
    bool render_r = rs > BHIDDEN;
    bool render_b = bs > BHIDDEN;

    if(render_t) {
        drawBorder(p, _tx, _ty, _tx + lx, _ty +  style->borderTopWidth(), BSTop, tc, style->color(), ts,
                   (render_l && (ls == DOTTED || ls == DASHED || ls == DOUBLE)?style->borderLeftWidth():0), 0);
        drawBorder(p, _tx+lx+lw, _ty, _tx + w, _ty +  style->borderTopWidth(), BSTop, tc, style->color(), ts,
                   0, (render_r && (rs == DOTTED || rs == DASHED || rs == DOUBLE)?style->borderRightWidth():0));
    }

    if(render_b)
        drawBorder(p, _tx, _ty + h - style->borderBottomWidth(), _tx + w, _ty + h, BSBottom, bc, style->color(), bs,
                   (render_l && (ls == DOTTED || ls == DASHED || ls == DOUBLE)?style->borderLeftWidth():0),
                   (render_r && (rs == DOTTED || rs == DASHED || rs == DOUBLE)?style->borderRightWidth():0));

    if(render_l)
    {
        const QColor& lc = style->borderLeftColor();

        bool ignore_top =
            (tc == lc) &&
            (ls >= OUTSET) &&
            (ts == DOTTED || ts == DASHED || ts == SOLID || ts == OUTSET);

        bool ignore_bottom =
            (bc == lc) &&
            (ls >= OUTSET) &&
            (bs == DOTTED || bs == DASHED || bs == SOLID || bs == INSET);

        drawBorder(p, _tx, _ty, _tx + style->borderLeftWidth(), _ty + h, BSLeft, lc, style->color(), ls,
                   ignore_top?0:style->borderTopWidth(),
                   ignore_bottom?0:style->borderBottomWidth());
    }

    if(render_r)
    {
        const QColor& rc = style->borderRightColor();

        bool ignore_top =
            (tc == rc) &&
            (rs >= DOTTED || rs == INSET) &&
            (ts == DOTTED || ts == DASHED || ts == SOLID || ts == OUTSET);

        bool ignore_bottom =
            (bc == rc) &&
            (rs >= DOTTED || rs == INSET) &&
            (bs == DOTTED || bs == DASHED || bs == SOLID || bs == INSET);

        drawBorder(p, _tx + w - style->borderRightWidth(), _ty, _tx + w, _ty + h, BSRight, rc, style->color(), rs,
                   ignore_top?0:style->borderTopWidth(),
                   ignore_bottom?0:style->borderBottomWidth());
    }
}