C++ RenderStyle::appearance方法代码示例

int RenderThemeSafari::popupInternalPaddingBottom(RenderStyle& style) const
{
    if (style.appearance() == MenulistPart)
        return popupButtonPadding(controlSizeForFont(style))[bottomPadding];
    if (style.appearance() == MenulistButtonPart)
        return styledPopupPaddingBottom;
    return 0;
}

void RenderThemeSafari::adjustSliderThumbSize(RenderStyle& style, Element*) const
{
    if (style.appearance() == SliderThumbHorizontalPart || style.appearance() == SliderThumbVerticalPart) {
        style.setWidth(Length(sliderThumbWidth, Fixed));
        style.setHeight(Length(sliderThumbHeight, Fixed));
    } 
#if ENABLE(VIDEO)
    else if (style.appearance() == MediaSliderThumbPart) 
        RenderMediaControls::adjustMediaSliderThumbSize(style);
#endif
}

int RenderThemeSafari::popupInternalPaddingRight(RenderStyle& style) const
{
    if (style.appearance() == MenulistPart)
        return popupButtonPadding(controlSizeForFont(style))[rightPadding];
    if (style.appearance() == MenulistButtonPart) {
        float fontScale = style.fontSize() / baseFontSize;
        float arrowWidth = baseArrowWidth * fontScale;
        return static_cast<int>(ceilf(arrowWidth + arrowPaddingLeft + arrowPaddingRight + paddingBeforeSeparator));
    }
    return 0;
}

bool RenderThemeSafari::isControlStyled(const RenderStyle& style, const BorderData& border,
                                     const FillLayer& background, const Color& backgroundColor) const
{
    // If we didn't find SafariTheme.dll we won't be able to paint any themed controls.
    if (!SafariThemeLibrary())
        return true;

    if (style.appearance() == TextFieldPart || style.appearance() == TextAreaPart || style.appearance() == ListboxPart)
        return style.border() != border;
    return RenderTheme::isControlStyled(style, border, background, backgroundColor);
}

bool RenderTheme::isControlStyled(const RenderStyle& style, const BorderData& border, const FillLayer& background, const Color& backgroundColor) const
{
    switch (style.appearance()) {
    case PushButtonPart:
    case SquareButtonPart:
    case DefaultButtonPart:
    case ButtonPart:
    case ListboxPart:
    case MenulistPart:
    case ProgressBarPart:
    case MeterPart:
    case RelevancyLevelIndicatorPart:
    case ContinuousCapacityLevelIndicatorPart:
    case DiscreteCapacityLevelIndicatorPart:
    case RatingLevelIndicatorPart:
    // FIXME: SearchFieldPart should be included here when making search fields style-able.
    case TextFieldPart:
    case TextAreaPart:
        // Test the style to see if the UA border and background match.
        return (style.border() != border
            || *style.backgroundLayers() != background
            || style.visitedDependentColor(CSSPropertyBackgroundColor) != backgroundColor);
    default:
        return false;
    }
}

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 RenderSliderThumb::layout()
{
    // FIXME: Hard-coding this cascade of appearance is bad, because it's something
    // that CSS usually does. We need to find a way to express this in CSS.
    RenderStyle* parentStyle = parent()->style();
    if (parentStyle->appearance() == SliderVerticalPart)
        style()->setAppearance(SliderThumbVerticalPart);
    else if (parentStyle->appearance() == SliderHorizontalPart)
        style()->setAppearance(SliderThumbHorizontalPart);
    else if (parentStyle->appearance() == MediaSliderPart)
        style()->setAppearance(MediaSliderThumbPart);
    else if (parentStyle->appearance() == MediaVolumeSliderPart)
        style()->setAppearance(MediaVolumeSliderThumbPart);

    if (style()->hasAppearance()) {
        // FIXME: This should pass the style, not the renderer, to the theme.
        theme()->adjustSliderThumbSize(this);
    }
    RenderBlock::layout();
}

void SliderThumbElement::setPositionFromPoint(const IntPoint& point)
{
    HTMLInputElement* input = hostInput();
    ASSERT(input);

    if (!input->renderer() || !renderer())
        return;

    IntPoint offset = roundedIntPoint(input->renderer()->absoluteToLocal(point, false, true));
    RenderStyle* sliderStyle = input->renderer()->style();
    bool isVertical = sliderStyle->appearance() == SliderVerticalPart || sliderStyle->appearance() == MediaVolumeSliderPart;

    int trackSize;
    int position;
    int currentPosition;
    if (isVertical) {
        trackSize = input->renderBox()->contentHeight() - renderBox()->height();
        position = offset.y() - renderBox()->height() / 2;
        currentPosition = renderBox()->y() - input->renderBox()->contentBoxRect().y();
    } else {
        trackSize = input->renderBox()->contentWidth() - renderBox()->width();
        position = offset.x() - renderBox()->width() / 2;
        currentPosition = renderBox()->x() - input->renderBox()->contentBoxRect().x();
    }
    position = max(0, min(position, trackSize));
    if (position == currentPosition)
        return;

    StepRange range(input);
    double fraction = static_cast<double>(position) / trackSize;
    if (isVertical)
        fraction = 1 - fraction;
    double value = range.clampValue(range.valueFromProportion(fraction));

    // FIXME: This is no longer being set from renderer. Consider updating the method name.
    input->setValueFromRenderer(serializeForNumberType(value));
    renderer()->setNeedsLayout(true);
    input->dispatchFormControlChangeEvent();
}

void RenderThemeSafari::adjustButtonStyle(StyleResolver& styleResolver, RenderStyle& style, Element*) const
{
    // There are three appearance constants for buttons.
    // (1) Push-button is the constant for the default Aqua system button.  Push buttons will not scale vertically and will not allow
    // custom fonts or colors.  <input>s use this constant.  This button will allow custom colors and font weights/variants but won't
    // scale vertically.
    // (2) square-button is the constant for the square button.  This button will allow custom fonts and colors and will scale vertically.
    // (3) Button is the constant that means "pick the best button as appropriate."  <button>s use this constant.  This button will
    // also scale vertically and allow custom fonts and colors.  It will attempt to use Aqua if possible and will make this determination
    // solely on the rectangle of the control.

    // Determine our control size based off our font.
    NSControlSize controlSize = controlSizeForFont(style);

    if (style.appearance() == PushButtonPart) {
        // Ditch the border.
        style.resetBorder();

        // Height is locked to auto.
        style.setHeight(Length(Auto));

        // White-space is locked to pre
        style.setWhiteSpace(PRE);

        // Set the button's vertical size.
        setButtonSize(style);

        // Add in the padding that we'd like to use.
        setButtonPaddingFromControlSize(style, controlSize);

        // Our font is locked to the appropriate system font size for the control.  To clarify, we first use the CSS-specified font to figure out
        // a reasonable control size, but once that control size is determined, we throw that font away and use the appropriate
        // system font for the control size instead.
        setFontFromControlSize(styleResolver, style, controlSize);
    } else {
        // Set a min-height so that we can't get smaller than the mini button.
        style.setMinHeight(Length(15, Fixed));

        // Reset the top and bottom borders.
        style.resetBorderTop();
        style.resetBorderBottom();
    }
}

void RenderMediaControls::adjustMediaSliderThumbSize(RenderStyle& style)
{
    int part;
    switch (style.appearance()) {
    case MediaSliderThumbPart:
        part = MediaSliderThumb;
        break;
    case MediaVolumeSliderThumbPart:
        part = MediaVolumeSliderThumb;
        break;
    case MediaFullScreenVolumeSliderThumbPart:
        part = MediaFullScreenVolumeSliderThumb;
        break;
    default:
        return;
    }

    CGSize size;
    wkMeasureMediaUIPart(part, 0, &size);

    float zoomLevel = style.effectiveZoom();
    style.setWidth(Length(static_cast<int>(size.width * zoomLevel), Fixed));
    style.setHeight(Length(static_cast<int>(size.height * zoomLevel), Fixed));
}

void RenderTheme::adjustStyle(StyleResolver& styleResolver, RenderStyle& style, Element* element, bool UAHasAppearance, const BorderData& border, const FillLayer& background, const Color& backgroundColor)
{
    // Force inline and table display styles to be inline-block (except for table- which is block)
    ControlPart part = style.appearance();
    if (style.display() == INLINE || style.display() == INLINE_TABLE || style.display() == TABLE_ROW_GROUP
        || style.display() == TABLE_HEADER_GROUP || style.display() == TABLE_FOOTER_GROUP
        || style.display() == TABLE_ROW || style.display() == TABLE_COLUMN_GROUP || style.display() == TABLE_COLUMN
        || style.display() == TABLE_CELL || style.display() == TABLE_CAPTION)
        style.setDisplay(INLINE_BLOCK);
    else if (style.display() == COMPACT || style.display() == LIST_ITEM || style.display() == TABLE)
        style.setDisplay(BLOCK);

    if (UAHasAppearance && isControlStyled(style, border, background, backgroundColor)) {
        if (part == MenulistPart) {
            style.setAppearance(MenulistButtonPart);
            part = MenulistButtonPart;
        } else
            style.setAppearance(NoControlPart);
    }

    if (!style.hasAppearance())
        return;

    // Never support box-shadow on native controls.
    style.setBoxShadow(nullptr);
    
#if USE(NEW_THEME)
    switch (part) {
    case CheckboxPart:
    case InnerSpinButtonPart:
    case RadioPart:
    case PushButtonPart:
    case SquareButtonPart:
    case DefaultButtonPart:
    case ButtonPart: {
        // Border
        LengthBox borderBox(style.borderTopWidth(), style.borderRightWidth(), style.borderBottomWidth(), style.borderLeftWidth());
        borderBox = m_theme->controlBorder(part, style.fontCascade(), borderBox, style.effectiveZoom());
        if (borderBox.top().value() != static_cast<int>(style.borderTopWidth())) {
            if (borderBox.top().value())
                style.setBorderTopWidth(borderBox.top().value());
            else
                style.resetBorderTop();
        }
        if (borderBox.right().value() != static_cast<int>(style.borderRightWidth())) {
            if (borderBox.right().value())
                style.setBorderRightWidth(borderBox.right().value());
            else
                style.resetBorderRight();
        }
        if (borderBox.bottom().value() != static_cast<int>(style.borderBottomWidth())) {
            style.setBorderBottomWidth(borderBox.bottom().value());
            if (borderBox.bottom().value())
                style.setBorderBottomWidth(borderBox.bottom().value());
            else
                style.resetBorderBottom();
        }
        if (borderBox.left().value() != static_cast<int>(style.borderLeftWidth())) {
            style.setBorderLeftWidth(borderBox.left().value());
            if (borderBox.left().value())
                style.setBorderLeftWidth(borderBox.left().value());
            else
                style.resetBorderLeft();
        }

        // Padding
        LengthBox paddingBox = m_theme->controlPadding(part, style.fontCascade(), style.paddingBox(), style.effectiveZoom());
        if (paddingBox != style.paddingBox())
            style.setPaddingBox(paddingBox);

        // Whitespace
        if (m_theme->controlRequiresPreWhiteSpace(part))
            style.setWhiteSpace(PRE);
            
        // Width / Height
        // The width and height here are affected by the zoom.
        // FIXME: Check is flawed, since it doesn't take min-width/max-width into account.
        LengthSize controlSize = m_theme->controlSize(part, style.fontCascade(), LengthSize(style.width(), style.height()), style.effectiveZoom());
        if (controlSize.width() != style.width())
            style.setWidth(controlSize.width());
        if (controlSize.height() != style.height())
            style.setHeight(controlSize.height());
                
        // Min-Width / Min-Height
        LengthSize minControlSize = m_theme->minimumControlSize(part, style.fontCascade(), style.effectiveZoom());
        if (minControlSize.width() != style.minWidth())
            style.setMinWidth(minControlSize.width());
        if (minControlSize.height() != style.minHeight())
            style.setMinHeight(minControlSize.height());
                
        // Font
        if (auto themeFont = m_theme->controlFont(part, style.fontCascade(), style.effectiveZoom())) {
            // If overriding the specified font with the theme font, also override the line height with the standard line height.
            style.setLineHeight(RenderStyle::initialLineHeight());
            if (style.setFontDescription(themeFont.value()))
                style.fontCascade().update(nullptr);
        }

        // Special style that tells enabled default buttons in active windows to use the ActiveButtonText color.
        // The active window part of the test has to be done at paint time since it's not triggered by a style change.
//.........这里部分代码省略.........

bool RenderTheme::supportsFocusRing(const RenderStyle& style) const
{
    return (style.hasAppearance() && style.appearance() != TextFieldPart && style.appearance() != TextAreaPart && style.appearance() != MenulistButtonPart && style.appearance() != ListboxPart);
}

void RenderThemeGtk::adjustButtonStyle(StyleResolver&, RenderStyle& style, WebCore::Element&) const
{
    // Some layout tests check explicitly that buttons ignore line-height.
    if (style.appearance() == PushButtonPart)
        style.setLineHeight(RenderStyle::initialLineHeight());
}

inline static bool hasVerticalAppearance(HTMLInputElement* input)
{
    ASSERT(input->renderer());
    RenderStyle* sliderStyle = input->renderer()->style();
    return sliderStyle->appearance() == SliderVerticalPart || sliderStyle->appearance() == MediaVolumeSliderPart;
}

bool RenderThemeGtk::supportsFocusRing(const RenderStyle& style) const
{
    return supportsFocus(style.appearance());
}