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.

    } else if (m_replace->options() & KFindDialog::FindBackwards) {
        m_repPara = paragraphs() - 1;
        m_repIndex = paragraphLength(m_repPara) - 1;
    } else {
        m_repPara = 0;
        m_repIndex = 0;
    }

    // Connect highlight signal to code which handles highlighting
    // of found text.
    connect(m_replace, SIGNAL(highlight(const QString &, int, int)),
            this, SLOT(slotFindHighlight(const QString &, int, int)));
    connect(m_replace, SIGNAL(findNext()), this, SLOT(slotReplaceNext()));
    connect(m_replace, SIGNAL(replace(const QString &, int, int, int)),
            this, SLOT(slotReplaceText(const QString &, int, int, int)));

    m_repDlg->close();
    slotReplaceNext();
#endif // KHTML_NO_SPELLING
}


void TextAreaWidget::slotReplaceNext()
{
#ifndef KHTML_NO_SPELLING
    if (!m_replace) {
        // assert?
        return;
    }

    if (!(m_replace->options() & KReplaceDialog::PromptOnReplace)) {
        viewport()->setUpdatesEnabled(false);
    }

    KFind::Result res = KFind::NoMatch;
    while (res == KFind::NoMatch) {
        // If we're done.....
        if (m_replace->options() & KFindDialog::FindBackwards) {
            if (m_repIndex == 0 && m_repPara == 0) {
                break;
            }
        } else {
            if (m_repPara == paragraphs() - 1 &&
                m_repIndex == paragraphLength(m_repPara) - 1) {
                break;
            }
        }

        if (m_replace->needData()) {
            m_replace->setData(text(m_repPara), m_repIndex);
        }

        res = m_replace->replace();

        if (res == KFind::NoMatch) {
            if (m_replace->options() & KFindDialog::FindBackwards) {
                if (m_repPara == 0) {
                    m_repIndex = 0;
                } else {
                    m_repPara--;
                    m_repIndex = paragraphLength(m_repPara) - 1;
                }
            } else {
                if (m_repPara == paragraphs() - 1) {
                    m_repIndex = paragraphLength(m_repPara) - 1;
                } else {
                    m_repPara++;
                    m_repIndex = 0;
                }
            }
        }
    }

    if (!(m_replace->options() & KReplaceDialog::PromptOnReplace)) {
        viewport()->setUpdatesEnabled(true);
        repaintChanged();
    }

    if (res == KFind::NoMatch) { // at end
        m_replace->displayFinalDialog();
        delete m_replace;
        m_replace = 0;
        ensureCursorVisible();
        //or           if ( m_replace->shouldRestart() ) { reinit (w/o FromCursor) and call slotReplaceNext(); }
    } else {
        //m_replace->closeReplaceNextDialog();
    }
#endif // KHTML_NO_SPELLING
}


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

    delete m_find;
    m_find = new KFind(m_findDlg->pattern(), m_findDlg->options(), this);
    if (m_find->options() & KFindDialog::FromCursor) {
        getCursorPosition(&m_findPara, &m_findIndex);
    } else if (m_find->options() & KFindDialog::FindBackwards) {
        m_findPara = paragraphs() - 1;
        m_findIndex = paragraphLength(m_findPara) - 1;
    } else {
        m_findPara = 0;
        m_findIndex = 0;
    }

    // Connect highlight signal to code which handles highlighting
    // of found text.
    connect(m_find, SIGNAL(highlight(const QString &, int, int)),
            this, SLOT(slotFindHighlight(const QString &, int, int)));
    connect(m_find, SIGNAL(findNext()), this, SLOT(slotFindNext()));

    m_findDlg->close();
    m_find->closeFindNextDialog();
    slotFindNext();
#endif // KHTML_NO_SPELLING
}


void TextAreaWidget::slotFindNext()
{
#ifndef KHTML_NO_SPELLING
    if (!m_find) {
        // assert?
        return;
    }

    KFind::Result res = KFind::NoMatch;
    while (res == KFind::NoMatch) {
        // If we're done.....
        if (m_find->options() & KFindDialog::FindBackwards) {
            if (m_findIndex == 0 && m_findPara == 0) {
                break;
            }
        } else {
            if (m_findPara == paragraphs() - 1 &&
                m_findIndex == paragraphLength(m_findPara) - 1) {
                break;
            }
        }

        if (m_find->needData()) {
            m_find->setData(text(m_findPara), m_findIndex);
        }

        res = m_find->find();

        if (res == KFind::NoMatch) {
            if (m_find->options() & KFindDialog::FindBackwards) {
                if (m_findPara == 0) {
                    m_findIndex = 0;
                } else {
                    m_findPara--;
                    m_findIndex = paragraphLength(m_findPara) - 1;
                }
            } else {
                if (m_findPara == paragraphs() - 1) {
                    m_findIndex = paragraphLength(m_findPara) - 1;
                } else {
                    m_findPara++;
                    m_findIndex = 0;
                }
            }
        }
    }

    if (res == KFind::NoMatch) { // at end
        m_find->displayFinalDialog();
        delete m_find;
        m_find = 0;
        //or           if ( m_find->shouldRestart() ) { reinit (w/o FromCursor) and call slotFindNext(); }
    } else {
        //m_find->closeFindNextDialog();
    }
#endif // KHTML_NO_SPELLING
}


void TextAreaWidget::slotFind()
{
#ifndef KHTML_NO_SPELLING
    if( text().isEmpty() )  // saves having to track the text changes
        return;

    if ( m_findDlg ) {
      KWin::activateWindow( m_findDlg->winId() );
    } else {
      m_findDlg = new KFindDialog(false, this, "KHTML Text Area Find Dialog");
      connect( m_findDlg, SIGNAL(okClicked()), this, SLOT(slotDoFind()) );
    }
    m_findDlg->show();
#endif // KHTML_NO_SPELLING
}


void TextAreaWidget::slotReplace()
{
#ifndef KHTML_NO_SPELLING
    if( text().isEmpty() )  // saves having to track the text changes
        return;

    if ( m_repDlg ) {
      KWin::activateWindow( m_repDlg->winId() );
    } else {
      m_repDlg = new KReplaceDialog(this, "KHTMLText Area Replace Dialog", 0,
                                    QStringList(), QStringList(), false);
      connect( m_repDlg, SIGNAL(okClicked()), this, SLOT(slotDoReplace()) );
    }
    m_repDlg->show();
#endif // KHTML_NO_SPELLING
}


bool TextAreaWidget::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 KTextEdit::event( e );
}

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

RenderTextArea::RenderTextArea(HTMLTextAreaElementImpl *element)
    : RenderFormElement(element)
{
    scrollbarsStyled = false;

    TextAreaWidget *edit = new TextAreaWidget(element->wrap(), view());
    setQWidget(edit);
    const KHTMLSettings *settings = view()->part()->settings();
#ifndef KHTML_NO_SPELLING
    edit->setCheckSpellingEnabled( settings->autoSpellCheck() );
#endif
    edit->setTabChangesFocus( ! settings->allowTabulation() );

    connect(edit,SIGNAL(textChanged()),this,SLOT(slotTextChanged()));
}

RenderTextArea::~RenderTextArea()
{
    if ( element()->m_dirtyvalue ) {
        element()->m_value = text();
        element()->m_dirtyvalue = false;
    }
}

void RenderTextArea::handleFocusOut()
{
    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);
    if ( w && element()->m_dirtyvalue ) {
        element()->m_value = text();
        element()->m_dirtyvalue = false;
        element()->onChange();
    }
}

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

    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);
    const QFontMetrics &m = style()->fontMetrics();
    w->setTabStopWidth(8 * m.width(" "));
    QSize size( kMax(element()->cols(), 1L)*m.width('x') + w->frameWidth() +
                w->verticalScrollBar()->sizeHint().width(),
                kMax(element()->rows(), 1L)*m.lineSpacing() + w->frameWidth()*4 +
                (w->wordWrap() == QTextEdit::NoWrap ?
                 w->horizontalScrollBar()->sizeHint().height() : 0)
        );

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

    RenderFormElement::calcMinMaxWidth();
}

void RenderTextArea::setStyle(RenderStyle* _style)
{
    bool unsubmittedFormChange = element()->m_unsubmittedFormChange;

    RenderFormElement::setStyle(_style);

    widget()->blockSignals(true);
    widget()->setAlignment(textAlignment());
    widget()->blockSignals(false);

    scrollbarsStyled = false;

    element()->m_unsubmittedFormChange = unsubmittedFormChange;
}

void RenderTextArea::layout()
{
    KHTMLAssert( needsLayout() );

    RenderFormElement::layout();

    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);

    if (!scrollbarsStyled) {
        w->horizontalScrollBar()->setPalette(style()->palette());
        w->verticalScrollBar()->setPalette(style()->palette());
        scrollbarsStyled=true;
    }
}

void RenderTextArea::updateFromElement()
{
    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);
    w->setReadOnly(element()->readOnly());
    QString elementText = element()->value().string();
    if ( elementText != w->text() )
    {
        w->blockSignals(true);
        int line, col;
        w->getCursorPosition( &line, &col );
        int cx = w->contentsX();
        int cy = w->contentsY();
        w->setText( elementText );
        w->setCursorPosition( line, col );
        w->scrollBy( cx, cy );
        w->blockSignals(false);
    }
    element()->m_dirtyvalue = false;

    RenderFormElement::updateFromElement();
}

void RenderTextArea::close( )
{
    element()->setValue( element()->defaultValue() );

    RenderFormElement::close();
}

static QString expandLF(const QString& s)
{
    // LF -> CRLF
    unsigned crs = s.contains( '\n' );
    if (crs == 0)
	return s;
    unsigned len = s.length();

    QString r;
    r.reserve(len + crs + 1);
    unsigned pos2 = 0;
    for(unsigned pos = 0; pos < len; pos++)
    {
       QChar c = s.at(pos);
       switch(c.unicode())
       {
         case '\n':
           r[pos2++] = '\r';
           r[pos2++] = '\n';
           break;

         case '\r':
           break;

         default:
           r[pos2++]= c;
           break;
       }
    }
    r.squeeze();
    return r;
}

QString RenderTextArea::text()
{
    QString txt;
    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);

    if(element()->wrap() == DOM::HTMLTextAreaElementImpl::ta_Physical) {
        // yeah, QTextEdit has no accessor for getting the visually wrapped text
        for (int p=0; p < w->paragraphs(); ++p) {
            int pl = w->paragraphLength(p);
            int ll = 0;
            int lindex = w->lineOfChar(p, 0);
            QString paragraphText = w->text(p);
            for (int l = 0; l < pl; ++l) {
                if (lindex != w->lineOfChar(p, l)) {
                    paragraphText.insert(l+ll++, QString::fromLatin1("\n"));
                    lindex = w->lineOfChar(p, l);
                }
            }
            txt += paragraphText;
            if (p < w->paragraphs() - 1)
                txt += QString::fromLatin1("\n");
        }
    }
    else
        txt = w->text();

    return expandLF(txt);
}


void RenderTextArea::highLightWord( unsigned int length, unsigned int pos )
{
#ifndef KHTML_NO_SPELLING
    TextAreaWidget* w = static_cast<TextAreaWidget*>(m_widget);
    if ( w )
        w->highLightWord( length, pos );
#endif // KHTML_NO_SPELLING
}


void RenderTextArea::slotTextChanged()
{
    element()->m_dirtyvalue = true;
    if (element()->m_value != text())
        element()->m_unsubmittedFormChange = true;
}

void RenderTextArea::select()
{
    static_cast<TextAreaWidget *>(m_widget)->selectAll();
}

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

#include "render_form.moc"