rendertreeastext.cpp

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

                if (!box.borderBottom())
                    ts << " none";
                else {
                    ts << " (" << box.borderBottom() << "px ";
                    printBorderStyle(ts, o.style()->borderBottomStyle());
                    Color col = o.style()->borderBottomColor();
                    if (!col.isValid())
                        col = o.style()->color();
                    ts << col.name() << ")";
                }
            }

            if (o.style()->borderLeft() != prevBorder) {
                prevBorder = o.style()->borderLeft();
                if (!box.borderLeft())
                    ts << " none";
                else {
                    ts << " (" << box.borderLeft() << "px ";
                    printBorderStyle(ts, o.style()->borderLeftStyle());
                    Color col = o.style()->borderLeftColor();
                    if (!col.isValid())
                        col = o.style()->color();
                    ts << col.name() << ")";
                }
            }

            ts << "]";
        }
    }

    if (o.isTableCell()) {
        const RenderTableCell& c = static_cast<const RenderTableCell&>(o);
        ts << " [r=" << c.row() << " c=" << c.col() << " rs=" << c.rowSpan() << " cs=" << c.colSpan() << "]";
    }

    if (o.isListMarker()) {
        String text = static_cast<const RenderListMarker&>(o).text();
        if (!text.isEmpty()) {
            if (text.length() != 1)
                text = quoteAndEscapeNonPrintables(text);
            else {
                switch (text[0]) {
                    case bullet:
                        text = "bullet";
                        break;
                    case blackSquare:
                        text = "black square";
                        break;
                    case whiteBullet:
                        text = "white bullet";
                        break;
                    default:
                        text = quoteAndEscapeNonPrintables(text);
                }
            }
            ts << ": " << text;
        }
    }

    return ts;
}

static void writeTextRun(TextStream& ts, const RenderText& o, const InlineTextBox& run)
{
    // FIXME: Table cell adjustment is temporary until results can be updated.
    int y = run.m_y;
    if (o.containingBlock()->isTableCell())
        y -= static_cast<RenderTableCell*>(o.containingBlock())->intrinsicPaddingTop();
    ts << "text run at (" << run.m_x << "," << y << ") width " << run.m_width;
    if (run.direction() == RTL || run.m_dirOverride) {
        ts << (run.direction() == RTL ? " RTL" : " LTR");
        if (run.m_dirOverride)
            ts << " override";
    }
    ts << ": "
        << quoteAndEscapeNonPrintables(String(o.text()).substring(run.start(), run.len()))
        << "\n";
}

void write(TextStream& ts, const RenderObject& o, int indent)
{
#if ENABLE(SVG)
    if (o.isRenderPath()) {
        write(ts, static_cast<const RenderPath&>(o), indent);
        return;
    }
    if (o.isSVGContainer()) {
        write(ts, static_cast<const RenderSVGContainer&>(o), indent);
        return;
    }
    if (o.isSVGRoot()) {
        write(ts, static_cast<const RenderSVGRoot&>(o), indent);
        return;
    }
    if (o.isSVGText()) {
        if (!o.isText())
            write(ts, static_cast<const RenderSVGText&>(o), indent);
        else
            write(ts, static_cast<const RenderSVGInlineText&>(o), indent);
        return;
    }
#endif

    writeIndent(ts, indent);

    ts << o << "\n";

    if (o.isText() && !o.isBR()) {
        const RenderText& text = *toRenderText(&o);
        for (InlineTextBox* box = text.firstTextBox(); box; box = box->nextTextBox()) {
            writeIndent(ts, indent + 1);
            writeTextRun(ts, text, *box);
        }
    }

    for (RenderObject* child = o.firstChild(); child; child = child->nextSibling()) {
        if (child->hasLayer())
            continue;
        write(ts, *child, indent + 1);
    }

    if (o.isWidget()) {
        Widget* widget = static_cast<const RenderWidget&>(o).widget();
        if (widget && widget->isFrameView()) {
            FrameView* view = static_cast<FrameView*>(widget);
            RenderView* root = view->frame()->contentRenderer();
            if (root) {
                view->layout();
                RenderLayer* l = root->layer();
                if (l)
                    writeLayers(ts, l, l, IntRect(l->x(), l->y(), l->width(), l->height()), indent + 1);
            }
        }
    }
}

static void write(TextStream& ts, RenderLayer& l,
                  const IntRect& layerBounds, const IntRect& backgroundClipRect, const IntRect& clipRect, const IntRect& outlineClipRect,
                  int layerType = 0, int indent = 0)
{
    writeIndent(ts, indent);

    ts << "layer " << layerBounds;

    if (!layerBounds.isEmpty()) {
        if (!backgroundClipRect.contains(layerBounds))
            ts << " backgroundClip " << backgroundClipRect;
        if (!clipRect.contains(layerBounds))
            ts << " clip " << clipRect;
        if (!outlineClipRect.contains(layerBounds))
            ts << " outlineClip " << outlineClipRect;
    }

    if (l.renderer()->hasOverflowClip()) {
        if (l.scrollXOffset())
            ts << " scrollX " << l.scrollXOffset();
        if (l.scrollYOffset())
            ts << " scrollY " << l.scrollYOffset();
        if (l.renderBox() && l.renderBox()->clientWidth() != l.scrollWidth())
            ts << " scrollWidth " << l.scrollWidth();
        if (l.renderBox() && l.renderBox()->clientHeight() != l.scrollHeight())
            ts << " scrollHeight " << l.scrollHeight();
    }

    if (layerType == -1)
        ts << " layerType: background only";
    else if (layerType == 1)
        ts << " layerType: foreground only";

    ts << "\n";

    if (layerType != -1)
        write(ts, *l.renderer(), indent + 1);
}

static void writeLayers(TextStream& ts, const RenderLayer* rootLayer, RenderLayer* l,
                        const IntRect& paintDirtyRect, int indent)
{
    // Calculate the clip rects we should use.
    IntRect layerBounds, damageRect, clipRectToApply, outlineRect;
    l->calculateRects(rootLayer, paintDirtyRect, layerBounds, damageRect, clipRectToApply, outlineRect, true);

    // Ensure our lists are up-to-date.
    l->updateZOrderLists();
    l->updateNormalFlowList();

    bool shouldPaint = l->intersectsDamageRect(layerBounds, damageRect, rootLayer);
    Vector<RenderLayer*>* negList = l->negZOrderList();
    if (shouldPaint && negList && negList->size() > 0)
        write(ts, *l, layerBounds, damageRect, clipRectToApply, outlineRect, -1, indent);

    if (negList) {
        for (unsigned i = 0; i != negList->size(); ++i)
            writeLayers(ts, rootLayer, negList->at(i), paintDirtyRect, indent);
    }

    if (shouldPaint)
        write(ts, *l, layerBounds, damageRect, clipRectToApply, outlineRect, negList && negList->size() > 0, indent);

    Vector<RenderLayer*>* normalFlowList = l->normalFlowList();
    if (normalFlowList) {
        for (unsigned i = 0; i != normalFlowList->size(); ++i)
            writeLayers(ts, rootLayer, normalFlowList->at(i), paintDirtyRect, indent);
    }

    Vector<RenderLayer*>* posList = l->posZOrderList();
    if (posList) {
        for (unsigned i = 0; i != posList->size(); ++i)
            writeLayers(ts, rootLayer, posList->at(i), paintDirtyRect, indent);
    }
}

static String nodePosition(Node* node)
{
    String result;

    Node* parent;
    for (Node* n = node; n; n = parent) {
        parent = n->parentNode();
        if (!parent)
            parent = n->shadowParentNode();
        if (n != node)
            result += " of ";
        if (parent)
            result += "child " + String::number(n->nodeIndex()) + " {" + getTagName(n) + "}";
        else
            result += "document";
    }

    return result;
}

static void writeSelection(TextStream& ts, const RenderObject* o)
{
    Node* n = o->node();
    if (!n || !n->isDocumentNode())
        return;

    Document* doc = static_cast<Document*>(n);
    Frame* frame = doc->frame();
    if (!frame)
        return;

    VisibleSelection selection = frame->selection()->selection();
    if (selection.isCaret()) {
        ts << "caret: position " << selection.start().offset() << " of " << nodePosition(selection.start().node());
        if (selection.affinity() == UPSTREAM)
            ts << " (upstream affinity)";
        ts << "\n";
    } else if (selection.isRange())
        ts << "selection start: position " << selection.start().offset() << " of " << nodePosition(selection.start().node()) << "\n"
           << "selection end:   position " << selection.end().offset() << " of " << nodePosition(selection.end().node()) << "\n";
}

String externalRepresentation(RenderObject* o)
{
    if (!o)
        return String();

    TextStream ts;
#if ENABLE(SVG)
    writeRenderResources(ts, o->document());
#endif
    if (o->view()->frameView())
        o->view()->frameView()->layout();
    if (o->hasLayer()) {
        RenderLayer* l = toRenderBox(o)->layer();
        writeLayers(ts, l, l, IntRect(l->x(), l->y(), l->width(), l->height()));
        writeSelection(ts, o);
    }
    return ts.release();
}

} // namespace WebCore