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.

        }
    }
    return false;
}

void LineEditWidget::mouseMoveEvent(QMouseEvent *e)
{
    // hack to prevent Qt from calling setCursor on the widget
    setDragEnabled(false);
    KLineEdit::mouseMoveEvent(e);
    setDragEnabled(true);
}


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

RenderLineEdit::RenderLineEdit(HTMLInputElementImpl *element)
    : RenderFormElement(element)
{
    LineEditWidget *edit = new LineEditWidget(element, view(), view()->viewport());
    connect(edit,SIGNAL(returnPressed()), this, SLOT(slotReturnPressed()));
    connect(edit,SIGNAL(textChanged(const QString &)),this,SLOT(slotTextChanged(const QString &)));

    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);
            edit->completionBox()->setTabHandling( false );
        }
    }

    setQWidget(edit);
}

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

    widget()->setAlignment(textAlignment());
}

void RenderLineEdit::highLightWord( unsigned int length, unsigned int pos )
{
    LineEditWidget* w = static_cast<LineEditWidget*>(m_widget);
    if ( w )
        w->highLightWord( length, pos );
}


void RenderLineEdit::slotReturnPressed()
{
    // 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 ) {
      box->hide();
      return;
    }

    // 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->submitFromKeyboard();
}

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

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

    const QFontMetrics &fm = style()->fontMetrics();
    QSize s;

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

    int h = fm.lineSpacing();
    int w = fm.width( 'x' ) * (size > 0 ? size+1 : 17); // "some"
    s = QSize(w + 2 + 2*widget()->frameWidth(),
              kMax(h, 14) + 2 + 2*widget()->frameWidth())
        .expandedTo(QApplication::globalStrut());

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

    RenderFormElement::calcMinMaxWidth();
}

void RenderLineEdit::updateFromElement()
{
    int ml = element()->maxLength();
    if ( ml < 0 || ml > 1024 )
        ml = 1024;

     if ( widget()->maxLength() != ml )  {
         widget()->setMaxLength( ml );
     }

    if (element()->value().string() != widget()->text()) {
        widget()->blockSignals(true);
        int pos = widget()->cursorPosition();
        widget()->setText(element()->value().string());

        widget()->setEdited( false );

        widget()->setCursorPosition(pos);
        widget()->blockSignals(false);
    }
    widget()->setReadOnly(element()->readOnly());

    RenderFormElement::updateFromElement();
}

void RenderLineEdit::slotTextChanged(const QString &string)
{
    // don't use setValue here!
    element()->m_value = string;
    element()->m_unsubmittedFormChange = true;
}

void RenderLineEdit::select()
{
    static_cast<LineEditWidget*>(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, kMax((b-h)/2, 0));
        m_height = kMax(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& pI, int _tx, int _ty)
{
    //kdDebug( 6040 ) << renderName() << "::paintDecorations()" << endl;

    RenderObject* legend = findLegend();
    if (!legend)
        return RenderBlock::paintBoxDecorations(pI, _tx, _ty);

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

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

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

    if ( style()->hasBorder() )
	    paintBorderMinusLegend(pI.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());
    }
}

void RenderFieldset::setStyle(RenderStyle* _style)
{
    RenderBlock::setStyle(_style);

    // WinIE renders fieldsets with display:inline like they're inline-blocks.  For us,
    // an inline-block is just a block element with replaced set to true and inline set
    // to true.  Ensure that if we ended up being inline that we set our replaced flag
    // so that we're treated like an inline-block.
    if (isInline())
        setReplaced(true);
}

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

RenderFileButton::RenderFileButton(HTMLInputElementImpl *element)
    : RenderFormElement(element)
{
    KURLRequester* w = new KURLRequester( view()->viewport(), "__khtml" );

    w->setMode(KFile::File | KFile::ExistingOnly);
    w->completionObject()->setDir(KGlobalSettings::documentPath());

    connect(w->lineEdit(), SIGNAL(returnPressed()), this, SLOT(slotReturnPressed()));
    connect(w->lineEdit(), SIGNAL(textChanged(const QString &)),this,SLOT(slotTextChanged(const QString &)));

    setQWidget(w);
    m_haveFocus = false;
}



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

    const QFontMetrics &fm = style()->fontMetrics();
    int size = element()->size();

    int h = fm.lineSpacing();
    int w = fm.width( 'x' ) * (size > 0 ? size : 17); // "some"
    KLineEdit* edit = static_cast<KURLRequester*>( m_widget )->lineEdit();
    QSize s = edit->style().sizeFromContents(QStyle::CT_LineEdit,
                                             edit,
          QSize(w + 2 + 2*edit->frameWidth(), kMax(h, 14) + 2 + 2*edit->frameWidth()))
        .expandedTo(QApplication::globalStrut());
    QSize bs = static_cast<KURLRequester*>( m_widget )->sizeHint();

    setIntrinsicWidth( s.width() + bs.width() );
    setIntrinsicHeight( kMax(s.height(), bs.height()) );

    RenderFormElement::calcMinMaxWidth();
}

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

void RenderFileButton::updateFromElement()
{
    KLineEdit* edit = widget()->lineEdit();
    edit->blockSignals(true);
    edit->setText(element()->value().string());
    edit->blockSignals(false);
    int ml = element()->maxLength();
    if ( ml < 0 || ml > 1024 )
        ml = 1024;
    edit->setMaxLength( ml );
    edit->setEdited( false );

    RenderFormElement::updateFromElement();
}

void RenderFileButton::slotReturnPressed()
{
    handleFocusOut();

    if (element()->form())
	element()->form()->submitFromKeyboard();
}

void RenderFileButton::slotTextChanged(const QString &/*string*/)
{
   element()->m_value = KURL( widget()->url() ).prettyURL( 0, KURL::StripFileProtocol );
}

void RenderFileButton::select()
{
    widget()->lineEdit()->selectAll();
}

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

RenderLabel::RenderLabel(HTMLGenericFormElementImpl *element)
    : RenderFormElement(element)
{

}

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

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

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

ComboBoxWidget::ComboBoxWidget(QWidget *parent)
    : KComboBox(false, parent, "__khtml")
{
    setAutoMask(true);
    if (listBox()) listBox()->installEventFilter(this);
    setMouseTracking(true);
}

bool ComboBoxWidget::event(QEvent *e)
{
    if (KComboBox::event(e))
	return true;
    if (e->type()==QEvent::KeyPress)
    {
	QKeyEvent *ke = static_cast<QKeyEvent *>(e);
	switch(ke->key())
	{
	case Key_Return:
	case Key_Enter:
	    popup();
	    ke->accept();
	    return true;
	default:
	    return false;
	}
    }
    return false;
}

bool ComboBoxWidget::eventFilter(QObject *dest, QEvent *e)
{
    if (dest==listBox() &&  e->type()==QEvent::KeyPress)
    {
	QKeyEvent *ke = static_cast<QKeyEvent *>(e);
	bool forward = false;
	switch(ke->key())
	{
	case Key_Tab:
	    forward=true;
	case Key_BackTab:
	    // ugly hack. emulate popdownlistbox() (private in QComboBox)
	    // we re-use ke here to store the reference to the generated event.
	    ke = new QKeyEvent(QEvent::KeyPress, Key_Escape, 0, 0);
	    QApplication::sendEvent(dest,ke);
	    focusNextPrevChild(forward);
	    delete ke;
	    return true;
	default:
	    return KComboBox::eventFilter(dest, e);
	}
    }
    return KComboBox::eventFilter(dest, e);
}

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

RenderSelect::RenderSelect(HTMLSelectElementImpl *element)
    : RenderFormElement(element)
{
    m_ignoreSelectEvents = false;
    m_multiple = element->multiple();
    m_size = element->size();
    m_useListBox = (m_multiple || m_size > 1);
    m_selectionChanged = true;
    m_optionsChanged = true;