C++ FloatPoint::y方法代码示例

void drawTextWithSpacing(GraphicsContext* graphicsContext, const SimpleFontData* font, const wxColour& color, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point)
{
    graphicsContext->save();
    
    wxGCDC* dc = static_cast<wxGCDC*>(graphicsContext->platformContext());

    wxFont* wxfont = font->getWxFont();
    graphicsContext->setFillColor(graphicsContext->fillColor(), DeviceColorSpace);

    CGContextRef cgContext = static_cast<CGContextRef>(dc->GetGraphicsContext()->GetNativeContext());

    CGFontRef cgFont;

#ifdef wxOSX_USE_CORE_TEXT && wxOSX_USE_CORE_TEXT
    cgFont = CTFontCopyGraphicsFont((CTFontRef)wxfont->OSXGetCTFont(), NULL);
#else
    ATSFontRef fontRef;
    
    fontRef = FMGetATSFontRefFromFont(wxfont->MacGetATSUFontID());
    
    if (fontRef)
        cgFont = CGFontCreateWithPlatformFont((void*)&fontRef);
#endif
    
    CGContextSetFont(cgContext, cgFont);

    CGContextSetFontSize(cgContext, wxfont->GetPointSize());

    CGFloat red, green, blue, alpha;
    graphicsContext->fillColor().getRGBA(red, green, blue, alpha);
    CGContextSetRGBFillColor(cgContext, red, green, blue, alpha);

    CGAffineTransform matrix = CGAffineTransformIdentity;
    matrix.b = -matrix.b;
    matrix.d = -matrix.d;
    
    CGContextSetTextMatrix(cgContext, matrix);

    CGContextSetTextPosition(cgContext, point.x(), point.y());
    
    const FloatSize* advanceSizes = static_cast<const FloatSize*>(glyphBuffer.advances(from));
    int size = glyphBuffer.size() - from;
    CGSize sizes[size];
    CGGlyph glyphs[numGlyphs];
    
    // if the function doesn't exist, we're probably on tiger and need to grab the
    // function under its old name, CGFontGetGlyphsForUnicodes
    if (!CGFontGetGlyphsForUnichars)
        CGFontGetGlyphsForUnichars = (CGFontGetGlyphsForUnicharsPtr)dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnicodes");
    
    // Let's make sure we got the function under one name or another!
    ASSERT(CGFontGetGlyphsForUnichars);
    CGFontGetGlyphsForUnichars(cgFont, glyphBuffer.glyphs(from), glyphs, numGlyphs);
    
    for (int i = 0; i < size; i++) {
        FloatSize fsize = advanceSizes[i];
        sizes[i] = CGSizeMake(fsize.width(), fsize.height());
    }
    
    CGContextShowGlyphsWithAdvances(cgContext, glyphs, sizes, numGlyphs);
    
    if (cgFont)
        CGFontRelease(cgFont);
    graphicsContext->restore();
}

void Font::drawGlyphs(GraphicsContext* gc, const SimpleFontData* font,
    const GlyphBuffer& glyphBuffer, unsigned from, unsigned numGlyphs,
    const FloatPoint& point, const FloatRect& textRect) const
{
    SkScalar x = SkFloatToScalar(point.x());
    SkScalar y = SkFloatToScalar(point.y());

// ENABLE_OPENTYPE_VERTICAL is not enabled on MACOSX
#if !OS(MACOSX)
    const OpenTypeVerticalData* verticalData = font->verticalData();
    if (font->platformData().orientation() == Vertical && verticalData) {
        SkAutoSTMalloc<32, SkPoint> storage(numGlyphs);
        SkPoint* pos = storage.get();

        AffineTransform savedMatrix = gc->getCTM();
        gc->concatCTM(AffineTransform(0, -1, 1, 0, point.x(), point.y()));
        gc->concatCTM(AffineTransform(1, 0, 0, 1, -point.x(), -point.y()));

        const unsigned kMaxBufferLength = 256;
        Vector<FloatPoint, kMaxBufferLength> translations;

        const FontMetrics& metrics = font->fontMetrics();
        SkScalar verticalOriginX = SkFloatToScalar(point.x() + metrics.floatAscent() - metrics.floatAscent(IdeographicBaseline));
        float horizontalOffset = point.x();

        unsigned glyphIndex = 0;
        while (glyphIndex < numGlyphs) {
            unsigned chunkLength = std::min(kMaxBufferLength, numGlyphs - glyphIndex);

            const Glyph* glyphs = glyphBuffer.glyphs(from + glyphIndex);
            translations.resize(chunkLength);
            verticalData->getVerticalTranslationsForGlyphs(font, &glyphs[0], chunkLength, reinterpret_cast<float*>(&translations[0]));

            x = verticalOriginX;
            y = SkFloatToScalar(point.y() + horizontalOffset - point.x());

            float currentWidth = 0;
            for (unsigned i = 0; i < chunkLength; ++i, ++glyphIndex) {
                pos[i].set(
                    x + SkIntToScalar(lroundf(translations[i].x())),
                    y + -SkIntToScalar(-lroundf(currentWidth - translations[i].y())));
                currentWidth += glyphBuffer.advanceAt(from + glyphIndex);
            }
            horizontalOffset += currentWidth;
            paintGlyphs(gc, font, glyphs, chunkLength, pos, textRect);
        }

        gc->setCTM(savedMatrix);
        return;
    }
#endif

    if (!glyphBuffer.hasOffsets()) {
        SkAutoSTMalloc<64, SkScalar> storage(numGlyphs);
        SkScalar* xpos = storage.get();
        const float* adv = glyphBuffer.advances(from);
        for (unsigned i = 0; i < numGlyphs; i++) {
            xpos[i] = x;
            x += SkFloatToScalar(adv[i]);
        }
        const Glyph* glyphs = glyphBuffer.glyphs(from);
        paintGlyphsHorizontal(gc, font, glyphs, numGlyphs, xpos, SkFloatToScalar(y), textRect);
        return;
    }

    // FIXME: text rendering speed:
    // Android has code in their WebCore fork to special case when the
    // GlyphBuffer has no advances other than the defaults. In that case the
    // text drawing can proceed faster. However, it's unclear when those
    // patches may be upstreamed to WebKit so we always use the slower path
    // here.
    SkAutoSTMalloc<32, SkPoint> storage(numGlyphs);
    SkPoint* pos = storage.get();
    const FloatSize* offsets = glyphBuffer.offsets(from);
    const float* advances = glyphBuffer.advances(from);
    SkScalar advanceSoFar = SkFloatToScalar(0);
    for (unsigned i = 0; i < numGlyphs; i++) {
        pos[i].set(
            x + SkFloatToScalar(offsets[i].width()) + advanceSoFar,
            y + SkFloatToScalar(offsets[i].height()));
        advanceSoFar += SkFloatToScalar(advances[i]);
    }

    const Glyph* glyphs = glyphBuffer.glyphs(from);
    paintGlyphs(gc, font, glyphs, numGlyphs, pos, textRect);
}

void Path::addArc(const FloatPoint& center, float radius, float startAngle, float endAngle, bool anticlockwise)
{
    // The OpenVG spec says nothing about inf as radius or start/end angle.
    // WebKit seems to pass those (e.g. https://bugs.webkit.org/show_bug.cgi?id=16449),
    // so abort instead of risking undefined behavior.
    if (!isfinite(radius) || !isfinite(startAngle) || !isfinite(endAngle))
        return;

    // For some reason, the HTML 5 spec defines the angle as going clockwise
    // from the positive X axis instead of going standard anticlockwise.
    // So let's make it a proper angle in order to keep sanity.
    startAngle = fmod((2.0 * piDouble) - startAngle, 2.0 * piDouble);
    endAngle = fmod((2.0 * piDouble) - endAngle, 2.0 * piDouble);

    // Make it so that endAngle > startAngle. fmod() above takes care of
    // keeping the difference below 360 degrees.
    if (endAngle <= startAngle)
        endAngle += 2.0 * piDouble;

    const VGfloat angleDelta = anticlockwise
        ? (endAngle - startAngle)
        : (startAngle - endAngle + (2.0 * piDouble));

    // OpenVG uses endpoint parameterization while this method receives its
    // values in center parameterization. It lacks an ellipse rotation
    // parameter so we use 0 for that, and also the radius is only a single
    // value which makes for rh == rv. In order to convert from endpoint to
    // center parameterization, we use the formulas from the OpenVG/SVG specs:

    // (x,y) = (cos rot, -sin rot; sin rot, -cos rot) * (rh * cos angle, rv * sin angle) + (center.x, center.y)
    // rot is 0, which simplifies this a bit:
    // (x,y) = (1, 0; 0, -1) * (rh * cos angle, rv * sin angle) + (center.x, center.y)
    //       = (1 * rh * cos angle + 0 * rv * sin angle, 0 * rh * cos angle + -1 * rv * sin angle) + (center.x, center.y)
    //       = (rh * cos angle, -rv * sin angle) + (center.x, center.y)
    // (Set angle = {startAngle, endAngle} to retrieve the respective endpoints.)

    const VGfloat startX = radius * cos(startAngle) + center.x();
    const VGfloat startY = -radius * sin(startAngle) + center.y();
    const VGfloat endX = radius * cos(endAngle) + center.x();
    const VGfloat endY = -radius * sin(endAngle) + center.y();

    // Fa: large arc flag, makes the difference between SCWARC_TO and LCWARC_TO
    //     respectively SCCWARC_TO and LCCWARC_TO arcs.
    const bool largeArc = (angleDelta > piDouble);

    // Fs: sweep flag, specifying whether the arc is drawn in increasing (true)
    //     or decreasing (0) direction. No need to calculate this value, as it
    //     we already get it passed as a parameter (Fs == !anticlockwise).

    // Translate the large arc and sweep flags into an OpenVG segment command.
    // As OpenVG thinks of everything upside down, we need to reverse the
    // anticlockwise parameter in order to get the specified rotation.
    const VGubyte segmentCommand = !anticlockwise
        ? (largeArc ? VG_LCCWARC_TO_ABS : VG_SCCWARC_TO_ABS)
        : (largeArc ? VG_LCWARC_TO_ABS : VG_SCWARC_TO_ABS);

    // So now, we've got all the parameters in endpoint parameterization format
    // as OpenVG requires it. Which means we can just pass it like this.
    const VGubyte pathSegments[] = {
        hasCurrentPoint() ? VG_LINE_TO_ABS : VG_MOVE_TO_ABS,
        segmentCommand
    };
    const VGfloat pathData[] = {
        startX, startY,
        radius, radius, 0, endX, endY
    };

    m_path->makeCompatibleContextCurrent();
    vgAppendPathData(m_path->vgPath(), 2, pathSegments, pathData);
    ASSERT_VG_NO_ERROR();

    m_path->m_currentPoint.setX(endX);
    m_path->m_currentPoint.setY(endY);
}

void Font::drawEmphasisMarksForComplexText(GraphicsContext* context, const TextRunPaintInfo& runInfo, const AtomicString& mark, const FloatPoint& point) const
{
    GlyphBuffer glyphBuffer;

    float initialAdvance = getGlyphsAndAdvancesForComplexText(runInfo, glyphBuffer, ForTextEmphasis);

    if (glyphBuffer.isEmpty())
        return;

    drawEmphasisMarks(context, runInfo, glyphBuffer, mark, FloatPoint(point.x() + initialAdvance, point.y()));
}

void GraphicsContext::drawLineForDocumentMarker(const FloatPoint& point, float width, DocumentMarkerLineStyle style)
{
    if (paintingDisabled())
        return;

    if (style != DocumentMarkerSpellingLineStyle && style != DocumentMarkerGrammarLineStyle)
        return;

    // These are the same for misspelling or bad grammar
    const int patternHeight = 3; // 3 rows
    ASSERT(cMisspellingLineThickness == patternHeight);
    const int patternWidth = 4; // 4 pixels
    ASSERT(patternWidth == cMisspellingLinePatternWidth);

    // Make sure to draw only complete dots.
    // NOTE: Code here used to shift the underline to the left and increase the width
    // to make sure everything gets underlined, but that results in drawing out of
    // bounds (e.g. when at the edge of a view) and could make it appear that the
    // space between adjacent misspelled words was underlined.
    // allow slightly more considering that the pattern ends with a transparent pixel
    float widthMod = fmodf(width, patternWidth);
    if (patternWidth - widthMod > cMisspellingLinePatternGapWidth)
        width -= widthMod;

    // Draw the underline
    CGContextRef context = platformContext();
    CGContextSaveGState(context);

    const Color& patternColor = style == DocumentMarkerGrammarLineStyle ? grammarPatternColor() : spellingPatternColor();
    setCGStrokeColor(context, patternColor);

    wkSetPatternPhaseInUserSpace(context, point);
    CGContextSetBlendMode(context, kCGBlendModeNormal);

    // 3 rows, each offset by half a pixel for blending purposes
    const CGPoint upperPoints [] = {{point.x(), point.y() + patternHeight - 2.5 }, {point.x() + width, point.y() + patternHeight - 2.5}};
    const CGPoint middlePoints [] = {{point.x(), point.y() + patternHeight - 1.5 }, {point.x() + width, point.y() + patternHeight - 1.5}};
    const CGPoint lowerPoints [] = {{point.x(), point.y() + patternHeight - 0.5 }, {point.x() + width, point.y() + patternHeight - 0.5 }};

    // Dash lengths for the top and bottom of the error underline are the same.
    // These are magic.
    static const CGFloat edge_dash_lengths[] = {2.0f, 2.0f};
    static const CGFloat middle_dash_lengths[] = { 2.76f, 1.24f };
    static const CGFloat edge_offset = -(edge_dash_lengths[1] - 1.0f) / 2.0f;
    static const CGFloat middle_offset = -(middle_dash_lengths[1] - 1.0f) / 2.0f;

    // Line opacities.  Once again, these are magic.
    const float upperOpacity = 0.33f;
    const float middleOpacity = 0.75f;
    const float lowerOpacity = 0.88f;

    //Top line
    CGContextSetLineDash(context, edge_offset, edge_dash_lengths, WTF_ARRAY_LENGTH(edge_dash_lengths));
    CGContextSetAlpha(context, upperOpacity);
    CGContextStrokeLineSegments(context, upperPoints, 2);

    // Middle line
    CGContextSetLineDash(context, middle_offset, middle_dash_lengths, WTF_ARRAY_LENGTH(middle_dash_lengths));
    CGContextSetAlpha(context, middleOpacity);
    CGContextStrokeLineSegments(context, middlePoints, 2);

    // Bottom line
    CGContextSetLineDash(context, edge_offset, edge_dash_lengths, WTF_ARRAY_LENGTH(edge_dash_lengths));
    CGContextSetAlpha(context, lowerOpacity);
    CGContextStrokeLineSegments(context, lowerPoints, 2);

    CGContextRestoreGState(context);
}

void HTMLAnchorElement::defaultEventHandler(Event* evt)
{
    // React on clicks and on keypresses.
    // Don't make this KEYUP_EVENT again, it makes khtml follow links it shouldn't,
    // when pressing Enter in the combo.
    if (isLink() && (evt->type() == eventNames().clickEvent || (evt->type() == eventNames().keydownEvent && focused()))) {
        MouseEvent* e = 0;
        if (evt->type() == eventNames().clickEvent && evt->isMouseEvent())
            e = static_cast<MouseEvent*>(evt);

        KeyboardEvent* k = 0;
        if (evt->type() == eventNames().keydownEvent && evt->isKeyboardEvent())
            k = static_cast<KeyboardEvent*>(evt);

        if (e && e->button() == RightButton) {
            HTMLElement::defaultEventHandler(evt);
            return;
        }

        // If the link is editable, then we need to check the settings to see whether or not to follow the link
        if (isContentEditable()) {
            EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;
            if (Settings* settings = document()->settings())
                editableLinkBehavior = settings->editableLinkBehavior();
                
            switch (editableLinkBehavior) {
                // Always follow the link (Safari 2.0 behavior)
                default:
                case EditableLinkDefaultBehavior:
                case EditableLinkAlwaysLive:
                    break;

                case EditableLinkNeverLive:
                    HTMLElement::defaultEventHandler(evt);
                    return;

                // If the selection prior to clicking on this link resided in the same editable block as this link,
                // and the shift key isn't pressed, we don't want to follow the link
                case EditableLinkLiveWhenNotFocused:
                    if (e && !e->shiftKey() && m_rootEditableElementForSelectionOnMouseDown == rootEditableElement()) {
                        HTMLElement::defaultEventHandler(evt);
                        return;
                    }
                    break;

                // Only follow the link if the shift key is down (WinIE/Firefox behavior)
                case EditableLinkOnlyLiveWithShiftKey:
                    if (e && !e->shiftKey()) {
                        HTMLElement::defaultEventHandler(evt);
                        return;
                    }
                    break;
            }
        }

        if (k) {
            if (k->keyIdentifier() != "Enter") {
                HTMLElement::defaultEventHandler(evt);
                return;
            }
            evt->setDefaultHandled();
            dispatchSimulatedClick(evt);
            return;
        }

        String url = deprecatedParseURL(getAttribute(hrefAttr));

        ASSERT(evt->target());
        ASSERT(evt->target()->toNode());
        if (evt->target()->toNode()->hasTagName(imgTag)) {
            HTMLImageElement* img = static_cast<HTMLImageElement*>(evt->target()->toNode());
            if (img && img->isServerMap()) {
                RenderImage* r = toRenderImage(img->renderer());
                if (r && e) {
                    // FIXME: broken with transforms
                    FloatPoint absPos = r->localToAbsolute();
                    int x = e->pageX() - absPos.x();
                    int y = e->pageY() - absPos.y();
                    url += "?";
                    url += String::number(x);
                    url += ",";
                    url += String::number(y);
                } else {
                    evt->setDefaultHandled();
                    HTMLElement::defaultEventHandler(evt);
                    return;
                }
            }
        }

        if (!evt->defaultPrevented() && document()->frame())
            document()->frame()->loader()->urlSelected(document()->completeURL(url), getAttribute(targetAttr), evt, false, false, true, hasRel(RelationNoReferrer) ? NoReferrer : SendReferrer);

        evt->setDefaultHandled();
    } else if (isLink() && isContentEditable()) {
        // This keeps track of the editable block that the selection was in (if it was in one) just before the link was clicked
        // for the LiveWhenNotFocused editable link behavior
        if (evt->type() == eventNames().mousedownEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() != RightButton && document()->frame() && document()->frame()->selection()) {
            MouseEvent* e = static_cast<MouseEvent*>(evt);

//.........这里部分代码省略.........