renderlistmarker.cpp

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    TextRun textRun(m_text);

    // Text is not arbitrary. We can judge whether it's RTL from the first character,
    // and we only need to handle the direction RightToLeft for now.
    bool textNeedsReversing = direction(m_text[0]) == RightToLeft;
    Vector<UChar> reversedText;
    if (textNeedsReversing) {
        int length = m_text.length();
        reversedText.grow(length);
        for (int i = 0; i < length; ++i)
            reversedText[length - i - 1] = m_text[i];
        textRun = TextRun(reversedText.data(), length);
    }

    const Font& font = style()->font();
    if (style()->direction() == LTR) {
        int width = font.width(textRun);
        context->drawText(style()->font(), textRun, marker.location());
        const UChar periodSpace[2] = { '.', ' ' };
        context->drawText(style()->font(), TextRun(periodSpace, 2), marker.location() + IntSize(width, 0));
    } else {
        const UChar spacePeriod[2] = { ' ', '.' };
        TextRun spacePeriodRun(spacePeriod, 2);
        int width = font.width(spacePeriodRun);
        context->drawText(style()->font(), spacePeriodRun, marker.location());
        context->drawText(style()->font(), textRun, marker.location() + IntSize(width, 0));
    }
}

void RenderListMarker::layout()
{
    ASSERT(needsLayout());
    ASSERT(!prefWidthsDirty());

    if (isImage()) {
        setWidth(m_image->imageSize(this, style()->effectiveZoom()).width());
        setHeight(m_image->imageSize(this, style()->effectiveZoom()).height());
    } else {
        setWidth(minPrefWidth());
        setHeight(style()->font().height());
    }

    m_marginLeft = m_marginRight = 0;

    Length leftMargin = style()->marginLeft();
    Length rightMargin = style()->marginRight();
    if (leftMargin.isFixed())
        m_marginLeft = leftMargin.value();
    if (rightMargin.isFixed())
        m_marginRight = rightMargin.value();

    setNeedsLayout(false);
}

void RenderListMarker::imageChanged(WrappedImagePtr o, const IntRect*)
{
    // A list marker can't have a background or border image, so no need to call the base class method.
    if (o != m_image->data())
        return;

    if (width() != m_image->imageSize(this, style()->effectiveZoom()).width() || height() != m_image->imageSize(this, style()->effectiveZoom()).height() || m_image->errorOccurred())
        setNeedsLayoutAndPrefWidthsRecalc();
    else
        repaint();
}

void RenderListMarker::calcPrefWidths()
{
    ASSERT(prefWidthsDirty());

    m_text = "";

    const Font& font = style()->font();

    if (isImage()) {
        // FIXME: This is a somewhat arbitrary width.  Generated images for markers really won't become particularly useful
        // until we support the CSS3 marker pseudoclass to allow control over the width and height of the marker box.
        int bulletWidth = font.ascent() / 2;
        m_image->setImageContainerSize(IntSize(bulletWidth, bulletWidth));
        m_minPrefWidth = m_maxPrefWidth = m_image->imageSize(this, style()->effectiveZoom()).width();
        setPrefWidthsDirty(false);
        updateMargins();
        return;
    }

    int width = 0;
    EListStyleType type = style()->listStyleType();
    switch (type) {
        case LNONE:
            break;
        case CIRCLE:
        case DISC:
        case SQUARE:
            m_text = listMarkerText(type, 0); // value is ignored for these types
            width = (font.ascent() * 2 / 3 + 1) / 2 + 2;
            break;
        case ARMENIAN:
        case CJK_IDEOGRAPHIC:
        case DECIMAL_LEADING_ZERO:
        case GEORGIAN:
        case HEBREW:
        case HIRAGANA:
        case HIRAGANA_IROHA:
        case KATAKANA:
        case KATAKANA_IROHA:
        case LDECIMAL:
        case LOWER_ALPHA:
        case LOWER_GREEK:
        case LOWER_LATIN:
        case LOWER_ROMAN:
        case UPPER_ALPHA:
        case UPPER_LATIN:
        case UPPER_ROMAN:
            m_text = listMarkerText(type, m_listItem->value());
            if (m_text.isEmpty())
                width = 0;
            else {
                int itemWidth = font.width(m_text);
                const UChar periodSpace[2] = { '.', ' ' };
                int periodSpaceWidth = font.width(TextRun(periodSpace, 2));
                width = itemWidth + periodSpaceWidth;
            }
            break;
    }

    m_minPrefWidth = width;
    m_maxPrefWidth = width;

    setPrefWidthsDirty(false);
    
    updateMargins();
}

void RenderListMarker::updateMargins()
{
    const Font& font = style()->font();

    int marginLeft = 0;
    int marginRight = 0;

    if (isInside()) {
        if (isImage()) {
            if (style()->direction() == LTR)
                marginRight = cMarkerPadding;
            else
                marginLeft = cMarkerPadding;
        } else switch (style()->listStyleType()) {
            case DISC:
            case CIRCLE:
            case SQUARE:
                if (style()->direction() == LTR) {
                    marginLeft = -1;
                    marginRight = font.ascent() - minPrefWidth() + 1;
                } else {
                    marginLeft = font.ascent() - minPrefWidth() + 1;
                    marginRight = -1;
                }
                break;
            default:
                break;
        }
    } else {
        if (style()->direction() == LTR) {
            if (isImage())
                marginLeft = -minPrefWidth() - cMarkerPadding;
            else {
                int offset = font.ascent() * 2 / 3;
                switch (style()->listStyleType()) {
                    case DISC:
                    case CIRCLE:
                    case SQUARE:
                        marginLeft = -offset - cMarkerPadding - 1;
                        break;
                    case LNONE:
                        break;
                    default:
                        marginLeft = m_text.isEmpty() ? 0 : -minPrefWidth() - offset / 2;
                }
            }
        } else {
            if (isImage())
                marginLeft = cMarkerPadding;
            else {
                int offset = font.ascent() * 2 / 3;
                switch (style()->listStyleType()) {
                    case DISC:
                    case CIRCLE:
                    case SQUARE:
                        marginLeft = offset + cMarkerPadding + 1 - minPrefWidth();
                        break;
                    case LNONE:
                        break;
                    default:
                        marginLeft = m_text.isEmpty() ? 0 : offset / 2;
                }
            }
        }
        marginRight = -marginLeft - minPrefWidth();
    }

    style()->setMarginLeft(Length(marginLeft, Fixed));
    style()->setMarginRight(Length(marginRight, Fixed));
}

int RenderListMarker::lineHeight(bool, bool) const
{
    if (!isImage())
        return m_listItem->lineHeight(false, true);
    return height();
}

int RenderListMarker::baselinePosition(bool, bool) const
{
    if (!isImage()) {
        const Font& font = style()->font();
        return font.ascent() + (lineHeight(false) - font.height())/2;
    }
    return height();
}

bool RenderListMarker::isInside() const
{
    return m_listItem->notInList() || style()->listStylePosition() == INSIDE;
}

IntRect RenderListMarker::getRelativeMarkerRect()
{
    if (isImage())
        return IntRect(x(), y(), m_image->imageSize(this, style()->effectiveZoom()).width(), m_image->imageSize(this, style()->effectiveZoom()).height());

    switch (style()->listStyleType()) {
        case DISC:
        case CIRCLE:
        case SQUARE: {
            // FIXME: Are these particular rounding rules necessary?
            const Font& font = style()->font();
            int ascent = font.ascent();
            int bulletWidth = (ascent * 2 / 3 + 1) / 2;
            return IntRect(x() + 1, y() + 3 * (ascent - ascent * 2 / 3) / 2, bulletWidth, bulletWidth);
        }
        case LNONE:
            return IntRect();
        case ARMENIAN:
        case CJK_IDEOGRAPHIC:
        case DECIMAL_LEADING_ZERO:
        case GEORGIAN:
        case HEBREW:
        case HIRAGANA:
        case HIRAGANA_IROHA:
        case KATAKANA:
        case KATAKANA_IROHA:
        case LDECIMAL:
        case LOWER_ALPHA:
        case LOWER_GREEK:
        case LOWER_LATIN:
        case LOWER_ROMAN:
        case UPPER_ALPHA:
        case UPPER_LATIN:
        case UPPER_ROMAN:
            if (m_text.isEmpty())
                return IntRect();
            const Font& font = style()->font();
            int itemWidth = font.width(m_text);
            const UChar periodSpace[2] = { '.', ' ' };
            int periodSpaceWidth = font.width(TextRun(periodSpace, 2));
            return IntRect(x(), y() + font.ascent(), itemWidth + periodSpaceWidth, font.height());
    }

    return IntRect();
}

void RenderListMarker::setSelectionState(SelectionState state)
{
    RenderBox::setSelectionState(state);
    if (InlineBox* box = inlineBoxWrapper())
        if (RootInlineBox* root = box->root())
            root->setHasSelectedChildren(state != SelectionNone);
    containingBlock()->setSelectionState(state);
}

IntRect RenderListMarker::selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool clipToVisibleContent)
{
    ASSERT(!needsLayout());

    if (selectionState() == SelectionNone || !inlineBoxWrapper())
        return IntRect();

    RootInlineBox* root = inlineBoxWrapper()->root();
    IntRect rect(0, root->selectionTop() - y(), width(), root->selectionHeight());
            
    if (clipToVisibleContent)
        computeRectForRepaint(repaintContainer, rect);
    else
        rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();
    
    return rect;
}

} // namespace WebCore