C++ RenderStyle::direction方法代码示例

void RenderMenuList::adjustInnerStyle()
{
    RenderStyle* innerStyle = m_innerBlock->style();
    innerStyle->setFlexGrow(1);
    innerStyle->setFlexShrink(1);
    // min-width: 0; is needed for correct shrinking.
    // FIXME: Remove this line when https://bugs.webkit.org/show_bug.cgi?id=111790 is fixed.
    innerStyle->setMinWidth(Length(0, Fixed));
    // Use margin:auto instead of align-items:center to get safe centering, i.e.
    // when the content overflows, treat it the same as align-items: flex-start.
    // But we only do that for the cases where html.css would otherwise use center.
    if (style()->alignItems() == AlignCenter) {
        innerStyle->setMarginTop(Length());
        innerStyle->setMarginBottom(Length());
        innerStyle->setAlignSelf(AlignFlexStart);
    }

    innerStyle->setPaddingLeft(Length(RenderTheme::theme().popupInternalPaddingLeft(style()), Fixed));
    innerStyle->setPaddingRight(Length(RenderTheme::theme().popupInternalPaddingRight(style()), Fixed));
    innerStyle->setPaddingTop(Length(RenderTheme::theme().popupInternalPaddingTop(style()), Fixed));
    innerStyle->setPaddingBottom(Length(RenderTheme::theme().popupInternalPaddingBottom(style()), Fixed));

    if (m_optionStyle) {
        if ((m_optionStyle->direction() != innerStyle->direction() || m_optionStyle->unicodeBidi() != innerStyle->unicodeBidi()))
            m_innerBlock->setNeedsLayoutAndPrefWidthsRecalc();
        innerStyle->setTextAlign(style()->isLeftToRightDirection() ? LEFT : RIGHT);
        innerStyle->setDirection(m_optionStyle->direction());
        innerStyle->setUnicodeBidi(m_optionStyle->unicodeBidi());
    }
}

ControlPart RenderThemeQStyle::initializeCommonQStyleOptions(QStyleFacadeOption &option, RenderObject* o) const
{
    // Default bits: no focus, no mouse over, enabled
    option.state &= ~(QStyleFacade::State_HasFocus | QStyleFacade::State_MouseOver);
    option.state |= QStyleFacade::State_Enabled;

    if (isReadOnlyControl(o))
        // Readonly is supported on textfields.
        option.state |= QStyleFacade::State_ReadOnly;

    option.direction = Qt::LeftToRight;

    if (isHovered(o))
        option.state |= QStyleFacade::State_MouseOver;

    setPaletteFromPageClientIfExists(option.palette);

    if (!isEnabled(o)) {
        option.palette.setCurrentColorGroup(QPalette::Disabled);
        option.state &= ~QStyleFacade::State_Enabled;
    }

    RenderStyle* style = o->style();
    if (!style)
        return NoControlPart;

    ControlPart result = style->appearance();
    if (supportsFocus(result) && isFocused(o)) {
        option.state |= QStyleFacade::State_HasFocus;
        option.state |= QStyleFacade::State_KeyboardFocusChange;
    }

    if (style->direction() == WebCore::RTL)
        option.direction = Qt::RightToLeft;

    switch (result) {
    case PushButtonPart:
    case SquareButtonPart:
    case ButtonPart:
    case ButtonBevelPart:
    case ListItemPart:
    case MenulistButtonPart:
    case InnerSpinButtonPart:
    case SearchFieldResultsButtonPart:
    case SearchFieldCancelButtonPart: {
        if (isPressed(o))
            option.state |= QStyleFacade::State_Sunken;
        else if (result == PushButtonPart || result == ButtonPart)
            option.state |= QStyleFacade::State_Raised;
        break;
    }
    case RadioPart:
    case CheckboxPart:
        option.state |= (isChecked(o) ? QStyleFacade::State_On : QStyleFacade::State_Off);
    }

    return result;
}

void RenderListBox::paintItemForeground(PaintInfo& paintInfo, int tx, int ty, int listIndex)
{
    SelectElement* select = toSelectElement(static_cast<Element*>(node()));
    const Vector<Element*>& listItems = select->listItems();
    Element* element = listItems[listIndex];
    OptionElement* optionElement = toOptionElement(element);

    String itemText;
    if (optionElement)
        itemText = optionElement->textIndentedToRespectGroupLabel();
    else if (OptionGroupElement* optionGroupElement = toOptionGroupElement(element))
        itemText = optionGroupElement->groupLabelText();      

    // Determine where the item text should be placed
    IntRect r = itemBoundingBoxRect(tx, ty, listIndex);
    r.move(optionsSpacingHorizontal, style()->font().ascent());

    RenderStyle* itemStyle = element->renderStyle();
    if (!itemStyle)
        itemStyle = style();
    
    Color textColor = element->renderStyle() ? element->renderStyle()->color() : style()->color();
    if (optionElement && optionElement->selected()) {
        if (document()->frame()->selection()->isFocusedAndActive() && document()->focusedNode() == node())
            textColor = theme()->activeListBoxSelectionForegroundColor();
        // Honor the foreground color for disabled items
        else if (!element->disabled())
            textColor = theme()->inactiveListBoxSelectionForegroundColor();
    }

    ColorSpace colorSpace = itemStyle->colorSpace();
    paintInfo.context->setFillColor(textColor, colorSpace);

    Font itemFont = style()->font();
    if (isOptionGroupElement(element)) {
        FontDescription d = itemFont.fontDescription();
        d.setWeight(d.bolderWeight());
        itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
        itemFont.update(document()->styleSelector()->fontSelector());
    }

    unsigned length = itemText.length();
    const UChar* string = itemText.characters();
    TextRun textRun(string, length, 0, 0, 0, itemStyle->direction() == RTL, itemStyle->unicodeBidi() == Override, false, false);

    // Draw the item text
    if (itemStyle->visibility() != HIDDEN)
        paintInfo.context->drawBidiText(itemFont, textRun, r.location());
}

void SVGTextMetricsCalculator::setupBidiRuns()
{
    RenderStyle* style = m_text->style();
    m_textDirection = style->direction();
    if (isOverride(style->unicodeBidi()))
        return;

    BidiStatus status(LTR, false);
    status.last = status.lastStrong = WTF::Unicode::OtherNeutral;
    m_bidiResolver.setStatus(status);
    m_bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&m_run, 0));
    const bool hardLineBreak = false;
    const bool reorderRuns = false;
    m_bidiResolver.createBidiRunsForLine(TextRunIterator(&m_run, m_run.length()), NoVisualOverride, hardLineBreak, reorderRuns);
    BidiRunList<BidiCharacterRun>& bidiRuns = m_bidiResolver.runs();
    m_bidiRun = bidiRuns.firstRun();
}

int RenderMarquee::computePosition(EMarqueeDirection dir, bool stopAtContentEdge)
{
    RenderBox* box = m_layer->renderBox();
    ASSERT(box);
    RenderStyle* s = box->style();
    if (isHorizontal()) {
        bool ltr = s->direction() == LTR;
        int clientWidth = box->clientWidth();
        int contentWidth = ltr ? box->rightmostPosition(true, false) : box->leftmostPosition(true, false);
        if (ltr)
            contentWidth += (box->paddingRight() - box->borderLeft());
        else {
            contentWidth = box->width() - contentWidth;
            contentWidth += (box->paddingLeft() - box->borderRight());
        }
        if (dir == MRIGHT) {
            if (stopAtContentEdge)
                return max(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? contentWidth : clientWidth;
        }
        else {
            if (stopAtContentEdge)
                return min(0, ltr ? (contentWidth - clientWidth) : (clientWidth - contentWidth));
            else
                return ltr ? -clientWidth : -contentWidth;
        }
    }
    else {
        int contentHeight = box->lowestPosition(true, false) -
                            box->borderTop() + box->paddingBottom();
        int clientHeight = box->clientHeight();
        if (dir == MUP) {
            if (stopAtContentEdge)
                return min(contentHeight - clientHeight, 0);
            else
                return -clientHeight;
        }
        else {
            if (stopAtContentEdge)
                return max(contentHeight - clientHeight, 0);
            else
                return contentHeight;
        }
    }
}

PopupMenuStyle RenderMenuList::itemStyle(unsigned listIndex) const
{
    const Vector<HTMLElement*>& listItems = toHTMLSelectElement(node())->listItems();
    if (listIndex >= listItems.size()) {
        // If we are making an out of bounds access, then we want to use the style
        // of a different option element (index 0). However, if there isn't an option element
        // before at index 0, we fall back to the menu's style.
        if (!listIndex)
            return menuStyle();

        // Try to retrieve the style of an option element we know exists (index 0).
        listIndex = 0;
    }
    HTMLElement* element = listItems[listIndex];
    
    RenderStyle* style = element->renderStyle() ? element->renderStyle() : element->computedStyle();
    return style ? PopupMenuStyle(style->visitedDependentColor(CSSPropertyColor), itemBackgroundColor(listIndex), style->font(), style->visibility() == VISIBLE,
        style->display() == NONE, style->textIndent(), style->direction(), isOverride(style->unicodeBidi())) : menuStyle();
}

void RenderMenuList::adjustInnerStyle()
{
    RenderStyle* innerStyle = m_innerBlock->style();
    innerStyle->setFlexGrow(1);
    innerStyle->setFlexShrink(1);
    // min-width: 0; is needed for correct shrinking.
    // FIXME: Remove this line when https://bugs.webkit.org/show_bug.cgi?id=111790 is fixed.
    innerStyle->setMinWidth(Length(0, Fixed));
    // Use margin:auto instead of align-items:center to get safe centering, i.e.
    // when the content overflows, treat it the same as align-items: flex-start.
    // But we only do that for the cases where html.css would otherwise use center.
    if (style()->alignItems() == AlignCenter) {
        innerStyle->setMarginTop(Length());
        innerStyle->setMarginBottom(Length());
        innerStyle->setAlignSelf(AlignFlexStart);
    }

    innerStyle->setPaddingLeft(Length(theme()->popupInternalPaddingLeft(style()), Fixed));
    innerStyle->setPaddingRight(Length(theme()->popupInternalPaddingRight(style()), Fixed));
    innerStyle->setPaddingTop(Length(theme()->popupInternalPaddingTop(style()), Fixed));
    innerStyle->setPaddingBottom(Length(theme()->popupInternalPaddingBottom(style()), Fixed));

    if (document()->page()->chrome().selectItemWritingDirectionIsNatural()) {
        // Items in the popup will not respect the CSS text-align and direction properties,
        // so we must adjust our own style to match.
        innerStyle->setTextAlign(LEFT);
        TextDirection direction = (m_buttonText && m_buttonText->text()->defaultWritingDirection() == WTF::Unicode::RightToLeft) ? RTL : LTR;
        innerStyle->setDirection(direction);
    } else if (m_optionStyle && document()->page()->chrome().selectItemAlignmentFollowsMenuWritingDirection()) {
        if ((m_optionStyle->direction() != innerStyle->direction() || m_optionStyle->unicodeBidi() != innerStyle->unicodeBidi()))
            m_innerBlock->setNeedsLayoutAndPrefWidthsRecalc();
        innerStyle->setTextAlign(style()->isLeftToRightDirection() ? LEFT : RIGHT);
        innerStyle->setDirection(m_optionStyle->direction());
        innerStyle->setUnicodeBidi(m_optionStyle->unicodeBidi());
    }
}

//.........这里部分代码省略.........
                return new CSSPrimitiveValueImpl(CSS_VAL_CROSSHAIR);
            case khtml::CURSOR_DEFAULT:
                return new CSSPrimitiveValueImpl(CSS_VAL_DEFAULT);
            case khtml::CURSOR_POINTER:
                return new CSSPrimitiveValueImpl(CSS_VAL_POINTER);
            case khtml::CURSOR_MOVE:
                return new CSSPrimitiveValueImpl(CSS_VAL_MOVE);
            case khtml::CURSOR_E_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_E_RESIZE);
            case khtml::CURSOR_NE_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_NE_RESIZE);
            case khtml::CURSOR_NW_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_NW_RESIZE);
            case khtml::CURSOR_N_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_N_RESIZE);
            case khtml::CURSOR_SE_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_SE_RESIZE);
            case khtml::CURSOR_SW_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_SW_RESIZE);
            case khtml::CURSOR_S_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_S_RESIZE);
            case khtml::CURSOR_W_RESIZE:
                return new CSSPrimitiveValueImpl(CSS_VAL_W_RESIZE);
            case khtml::CURSOR_TEXT:
                return new CSSPrimitiveValueImpl(CSS_VAL_TEXT);
            case khtml::CURSOR_WAIT:
                return new CSSPrimitiveValueImpl(CSS_VAL_WAIT);
            case khtml::CURSOR_HELP:
                return new CSSPrimitiveValueImpl(CSS_VAL_HELP);
        }
        ASSERT_NOT_REACHED();
        return 0;
    case CSS_PROP_DIRECTION:
        switch (style->direction()) {
            case khtml::LTR:
                return new CSSPrimitiveValueImpl(CSS_VAL_LTR);
            case khtml::RTL:
                return new CSSPrimitiveValueImpl(CSS_VAL_RTL);
        }
        ASSERT_NOT_REACHED();
        return 0;
    case CSS_PROP_DISPLAY:
        switch (style->display()) {
            case khtml::INLINE:
                return new CSSPrimitiveValueImpl(CSS_VAL_INLINE);
            case khtml::BLOCK:
                return new CSSPrimitiveValueImpl(CSS_VAL_BLOCK);
            case khtml::LIST_ITEM:
                return new CSSPrimitiveValueImpl(CSS_VAL_LIST_ITEM);
            case khtml::RUN_IN:
                return new CSSPrimitiveValueImpl(CSS_VAL_RUN_IN);
            case khtml::COMPACT:
                return new CSSPrimitiveValueImpl(CSS_VAL_COMPACT);
            case khtml::INLINE_BLOCK:
                return new CSSPrimitiveValueImpl(CSS_VAL_INLINE_BLOCK);
            case khtml::TABLE:
                return new CSSPrimitiveValueImpl(CSS_VAL_TABLE);
            case khtml::INLINE_TABLE:
                return new CSSPrimitiveValueImpl(CSS_VAL_INLINE_TABLE);
            case khtml::TABLE_ROW_GROUP:
                return new CSSPrimitiveValueImpl(CSS_VAL_TABLE_ROW_GROUP);
            case khtml::TABLE_HEADER_GROUP:
                return new CSSPrimitiveValueImpl(CSS_VAL_TABLE_HEADER_GROUP);
            case khtml::TABLE_FOOTER_GROUP:
                return new CSSPrimitiveValueImpl(CSS_VAL_TABLE_FOOTER_GROUP);
            case khtml::TABLE_ROW: