thememac.mm

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

    NSButtonCell* radioCell = radio(states, zoomedRect, zoomFactor);

    context->save();

    NSControlSize controlSize = [radioCell controlSize];
    IntSize zoomedSize = radioSizes()[controlSize];
    zoomedSize.setWidth(zoomedSize.width() * zoomFactor);
    zoomedSize.setHeight(zoomedSize.height() * zoomFactor);
    IntRect inflatedRect = inflateRect(zoomedRect, zoomedSize, radioMargins(controlSize), zoomFactor);
    
    if (zoomFactor != 1.0f) {
        inflatedRect.setWidth(inflatedRect.width() / zoomFactor);
        inflatedRect.setHeight(inflatedRect.height() / zoomFactor);
        context->translate(inflatedRect.x(), inflatedRect.y());
        context->scale(FloatSize(zoomFactor, zoomFactor));
        context->translate(-inflatedRect.x(), -inflatedRect.y());
    }
    
    [radioCell drawWithFrame:NSRect(inflatedRect) inView:scrollView->documentView()];
    [radioCell setControlView:nil];

    context->restore();
}

// Buttons

// Buttons really only constrain height. They respect width.
static const IntSize* buttonSizes()
{
    static const IntSize sizes[3] = { IntSize(0, 21), IntSize(0, 18), IntSize(0, 15) };
    return sizes;
}

static const int* buttonMargins(NSControlSize controlSize)
{
    static const int margins[3][4] =
    {
        { 4, 6, 7, 6 },
        { 4, 5, 6, 5 },
        { 0, 1, 1, 1 },
    };
    return margins[controlSize];
}

static NSButtonCell* button(ControlPart part, ControlStates states, const IntRect& zoomedRect, float zoomFactor)
{
    static NSButtonCell *buttonCell;
    static bool defaultButton;
    if (!buttonCell) {
        buttonCell = [[NSButtonCell alloc] init];
        [buttonCell setTitle:nil];
        [buttonCell setButtonType:NSMomentaryPushInButton];
    }

    // Set the control size based off the rectangle we're painting into.
    if (part == SquareButtonPart || zoomedRect.height() > buttonSizes()[NSRegularControlSize].height() * zoomFactor) {
        // Use the square button
        if ([buttonCell bezelStyle] != NSShadowlessSquareBezelStyle)
            [buttonCell setBezelStyle:NSShadowlessSquareBezelStyle];
    } else if ([buttonCell bezelStyle] != NSRoundedBezelStyle)
        [buttonCell setBezelStyle:NSRoundedBezelStyle];

    setControlSize(buttonCell, buttonSizes(), zoomedRect.size(), zoomFactor);

    if (defaultButton != (states & DefaultState)) {
        defaultButton = !defaultButton;
        [buttonCell setKeyEquivalent:(defaultButton ? @"\r" : @"")];
    }

    // Update the various states we respond to.
    updateStates(buttonCell, states);
    
    return buttonCell;
}

static void paintButton(ControlPart part, ControlStates states, GraphicsContext* context, const IntRect& zoomedRect, float zoomFactor, ScrollView* scrollView)
{
    // Determine the width and height needed for the control and prepare the cell for painting.
    NSButtonCell *buttonCell = button(part, states, zoomedRect, zoomFactor);
    LocalCurrentGraphicsContext localContext(context);

    NSControlSize controlSize = [buttonCell controlSize];
    IntSize zoomedSize = buttonSizes()[controlSize];
    zoomedSize.setWidth(zoomedRect.width()); // Buttons don't ever constrain width, so the zoomed width can just be honored.
    zoomedSize.setHeight(zoomedSize.height() * zoomFactor);
    IntRect inflatedRect = zoomedRect;
    if ([buttonCell bezelStyle] == NSRoundedBezelStyle) {
        // Center the button within the available space.
        if (inflatedRect.height() > zoomedSize.height()) {
            inflatedRect.setY(inflatedRect.y() + (inflatedRect.height() - zoomedSize.height()) / 2);
            inflatedRect.setHeight(zoomedSize.height());
        }

        // Now inflate it to account for the shadow.
        inflatedRect = inflateRect(inflatedRect, zoomedSize, buttonMargins(controlSize), zoomFactor);

        if (zoomFactor != 1.0f) {
            inflatedRect.setWidth(inflatedRect.width() / zoomFactor);
            inflatedRect.setHeight(inflatedRect.height() / zoomFactor);
            context->translate(inflatedRect.x(), inflatedRect.y());
            context->scale(FloatSize(zoomFactor, zoomFactor));
            context->translate(-inflatedRect.x(), -inflatedRect.y());
        }
    } 

    NSView *view = scrollView->documentView();
    NSWindow *window = [view window];
    NSButtonCell *previousDefaultButtonCell = [window defaultButtonCell];

    if ((states & DefaultState) && [window isKeyWindow]) {
        [window setDefaultButtonCell:buttonCell];
        wkAdvanceDefaultButtonPulseAnimation(buttonCell);
    } else if ([previousDefaultButtonCell isEqual:buttonCell])
        [window setDefaultButtonCell:nil];

    [buttonCell drawWithFrame:NSRect(inflatedRect) inView:view];
    [buttonCell setControlView:nil];

    if (![previousDefaultButtonCell isEqual:buttonCell])
        [window setDefaultButtonCell:previousDefaultButtonCell];
}

// Theme overrides

int ThemeMac::baselinePositionAdjustment(ControlPart part) const
{
    if (part == CheckboxPart || part == RadioPart)
        return -2;
    return Theme::baselinePositionAdjustment(part);
}

FontDescription ThemeMac::controlFont(ControlPart part, const Font& font, float zoomFactor) const
{
    switch (part) {
        case PushButtonPart: {
            FontDescription fontDescription;
            fontDescription.setIsAbsoluteSize(true);
            fontDescription.setGenericFamily(FontDescription::SerifFamily);

            NSFont* nsFont = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:controlSizeForFont(font)]];
            fontDescription.firstFamily().setFamily([nsFont familyName]);
            fontDescription.setComputedSize([nsFont pointSize] * zoomFactor);
            fontDescription.setSpecifiedSize([nsFont pointSize] * zoomFactor);
            return fontDescription;
        }
        default:
            return Theme::controlFont(part, font, zoomFactor);
    }
}

LengthSize ThemeMac::controlSize(ControlPart part, const Font& font, const LengthSize& zoomedSize, float zoomFactor) const
{
    switch (part) {
        case CheckboxPart:
            return checkboxSize(font, zoomedSize, zoomFactor);
        case RadioPart:
            return radioSize(font, zoomedSize, zoomFactor);
        case PushButtonPart:
            // Height is reset to auto so that specified heights can be ignored.
            return sizeFromFont(font, LengthSize(zoomedSize.width(), Length()), zoomFactor, buttonSizes());
        default:
            return zoomedSize;
    }
}

LengthSize ThemeMac::minimumControlSize(ControlPart part, const Font& font, float zoomFactor) const
{
    switch (part) {
        case SquareButtonPart:
        case DefaultButtonPart:
        case ButtonPart:
            return LengthSize(Length(0, Fixed), Length(static_cast<int>(15 * zoomFactor), Fixed));
        default:
            return Theme::minimumControlSize(part, font, zoomFactor);
    }
}

LengthBox ThemeMac::controlBorder(ControlPart part, const Font& font, const LengthBox& zoomedBox, float zoomFactor) const
{
    switch (part) {
        case SquareButtonPart:
        case DefaultButtonPart:
        case ButtonPart:
            return LengthBox(0, zoomedBox.right().value(), 0, zoomedBox.left().value());
        default:
            return Theme::controlBorder(part, font, zoomedBox, zoomFactor);
    }
}

LengthBox ThemeMac::controlPadding(ControlPart part, const Font& font, const LengthBox& zoomedBox, float zoomFactor) const
{
    switch (part) {
        case PushButtonPart: {
            // Just use 8px.  AppKit wants to use 11px for mini buttons, but that padding is just too large
            // for real-world Web sites (creating a huge necessary minimum width for buttons whose space is
            // by definition constrained, since we select mini only for small cramped environments.
            // This also guarantees the HTML <button> will match our rendering by default, since we're using a consistent
            // padding.
            const int padding = 8 * zoomFactor;
            return LengthBox(0, padding, 0, padding);
        }
        default:
            return Theme::controlPadding(part, font, zoomedBox, zoomFactor);
    }
}

void ThemeMac::inflateControlPaintRect(ControlPart part, ControlStates states, IntRect& zoomedRect, float zoomFactor) const
{
    switch (part) {
        case CheckboxPart: {
            // We inflate the rect as needed to account for padding included in the cell to accommodate the checkbox
            // shadow" and the check.  We don't consider this part of the bounds of the control in WebKit.
            NSCell *cell = checkbox(states, zoomedRect, zoomFactor);
            NSControlSize controlSize = [cell controlSize];
            IntSize zoomedSize = checkboxSizes()[controlSize];
            zoomedSize.setHeight(zoomedSize.height() * zoomFactor);
            zoomedSize.setWidth(zoomedSize.width() * zoomFactor);
            zoomedRect = inflateRect(zoomedRect, zoomedSize, checkboxMargins(controlSize), zoomFactor);
            break;
        }
        case RadioPart: {
            // We inflate the rect as needed to account for padding included in the cell to accommodate the radio button
            // shadow".  We don't consider this part of the bounds of the control in WebKit.
            NSCell *cell = radio(states, zoomedRect, zoomFactor);
            NSControlSize controlSize = [cell controlSize];
            IntSize zoomedSize = radioSizes()[controlSize];
            zoomedSize.setHeight(zoomedSize.height() * zoomFactor);
            zoomedSize.setWidth(zoomedSize.width() * zoomFactor);
            zoomedRect = inflateRect(zoomedRect, zoomedSize, radioMargins(controlSize), zoomFactor);
            break;
        }
        case PushButtonPart:
        case DefaultButtonPart:
        case ButtonPart: {
            NSButtonCell *cell = button(part, states, zoomedRect, zoomFactor);
            NSControlSize controlSize = [cell controlSize];

            // We inflate the rect as needed to account for the Aqua button's shadow.
            if ([cell bezelStyle] == NSRoundedBezelStyle) {
                IntSize zoomedSize = buttonSizes()[controlSize];
                zoomedSize.setHeight(zoomedSize.height() * zoomFactor);
                zoomedSize.setWidth(zoomedRect.width()); // Buttons don't ever constrain width, so the zoomed width can just be honored.
                zoomedRect = inflateRect(zoomedRect, zoomedSize, buttonMargins(controlSize), zoomFactor);
            }
            break;
        }
        default:
            break;
    }
}

void ThemeMac::paint(ControlPart part, ControlStates states, GraphicsContext* context, const IntRect& zoomedRect, float zoomFactor, ScrollView* scrollView) const
{
    switch (part) {
        case CheckboxPart:
            paintCheckbox(states, context, zoomedRect, zoomFactor, scrollView);
            break;
        case RadioPart:
            paintRadio(states, context, zoomedRect, zoomFactor, scrollView);
            break;
        case PushButtonPart:
        case DefaultButtonPart:
        case ButtonPart:
        case SquareButtonPart:
            paintButton(part, states, context, zoomedRect, zoomFactor, scrollView);
            break;
        default:
            break;
    }
}

}