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

/*
 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "RenderTreeAsText.h"

#include "CharacterNames.h"
#include "Document.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "InlineTextBox.h"
#include "RenderBR.h"
#include "RenderInline.h"
#include "RenderListMarker.h"
#include "RenderTableCell.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "SelectionController.h"
#include "TextStream.h"
#include <wtf/Vector.h>

#if ENABLE(SVG)
#include "RenderSVGRoot.h"
#include "RenderSVGContainer.h"
#include "RenderSVGInlineText.h"
#include "RenderSVGText.h"
#include "SVGRenderTreeAsText.h"
#endif

namespace WebCore {

using namespace HTMLNames;

static void writeLayers(TextStream&, const RenderLayer* rootLayer, RenderLayer*, const IntRect& paintDirtyRect, int indent = 0);

#if !ENABLE(SVG)
static TextStream &operator<<(TextStream& ts, const IntRect& r)
{
    return ts << "at (" << r.x() << "," << r.y() << ") size " << r.width() << "x" << r.height();
}
#endif

static void writeIndent(TextStream& ts, int indent)
{
    for (int i = 0; i != indent; ++i)
        ts << "  ";
}

static void printBorderStyle(TextStream& ts, const EBorderStyle borderStyle)
{
    switch (borderStyle) {
        case BNONE:
            ts << "none";
            break;
        case BHIDDEN:
            ts << "hidden";
            break;
        case INSET:
            ts << "inset";
            break;
        case GROOVE:
            ts << "groove";
            break;
        case RIDGE:
            ts << "ridge";
            break;
        case OUTSET:
            ts << "outset";
            break;
        case DOTTED:
            ts << "dotted";
            break;
        case DASHED:
            ts << "dashed";
            break;
        case SOLID:
            ts << "solid";
            break;
        case DOUBLE:
            ts << "double";
            break;
    }

    ts << " ";
}

static String getTagName(Node* n)
{
    if (n->isDocumentNode())
        return "";
    if (n->isCommentNode())
        return "COMMENT";
    return n->nodeName();
}

static bool isEmptyOrUnstyledAppleStyleSpan(const Node* node)
{
    if (!node || !node->isHTMLElement() || !node->hasTagName(spanTag))
        return false;

    const HTMLElement* elem = static_cast<const HTMLElement*>(node);
    if (elem->getAttribute(classAttr) != "Apple-style-span")
        return false;

    if (!node->hasChildNodes())
        return true;

    CSSMutableStyleDeclaration* inlineStyleDecl = elem->inlineStyleDecl();
    return (!inlineStyleDecl || inlineStyleDecl->length() == 0);
}

String quoteAndEscapeNonPrintables(const String& s)
{
    Vector<UChar> result;
    result.append('"');
    for (unsigned i = 0; i != s.length(); ++i) {
        UChar c = s[i];
        if (c == '\\') {
            result.append('\\');
            result.append('\\');
        } else if (c == '"') {
            result.append('\\');
            result.append('"');
        } else if (c == '\n' || c == noBreakSpace)
            result.append(' ');
        else {
            if (c >= 0x20 && c < 0x7F)
                result.append(c);
            else {
                unsigned u = c;
                String hex = String::format("\\x{%X}", u);
                unsigned len = hex.length();
                for (unsigned i = 0; i < len; ++i)
                    result.append(hex[i]);
            }
        }
    }
    result.append('"');
    return String::adopt(result);
}

static TextStream &operator<<(TextStream& ts, const RenderObject& o)
{
    ts << o.renderName();

    if (o.style() && o.style()->zIndex())
        ts << " zI: " << o.style()->zIndex();

    if (o.node()) {
        String tagName = getTagName(o.node());
        if (!tagName.isEmpty()) {
            ts << " {" << tagName << "}";
            // flag empty or unstyled AppleStyleSpan because we never
            // want to leave them in the DOM
            if (isEmptyOrUnstyledAppleStyleSpan(o.node()))
                ts << " *empty or unstyled AppleStyleSpan*";
        }
    }

    bool adjustForTableCells = o.containingBlock()->isTableCell();

    IntRect r;
    if (o.isText()) {
        // FIXME: Would be better to dump the bounding box x and y rather than the first run's x and y, but that would involve updating
        // many test results.
        const RenderText& text = *toRenderText(&o);
        IntRect linesBox = text.linesBoundingBox();
        r = IntRect(text.firstRunX(), text.firstRunY(), linesBox.width(), linesBox.height());
        if (adjustForTableCells && !text.firstTextBox())
            adjustForTableCells = false;
    } else if (o.isRenderInline()) {
        // FIXME: Would be better not to just dump 0, 0 as the x and y here.
        const RenderInline& inlineFlow = *toRenderInline(&o);
        r = IntRect(0, 0, inlineFlow.linesBoundingBox().width(), inlineFlow.linesBoundingBox().height());
        adjustForTableCells = false;
    } else if (o.isTableCell()) {
        // FIXME: Deliberately dump the "inner" box of table cells, since that is what current results reflect.  We'd like
        // to clean up the results to dump both the outer box and the intrinsic padding so that both bits of information are
        // captured by the results.
        const RenderTableCell& cell = static_cast<const RenderTableCell&>(o);
        r = IntRect(cell.x(), cell.y() + cell.intrinsicPaddingTop(), cell.width(), cell.height() - cell.intrinsicPaddingTop() - cell.intrinsicPaddingBottom());
    } else if (o.isBox())
        r = toRenderBox(&o)->frameRect();

    // FIXME: Temporary in order to ensure compatibility with existing layout test results.
    if (adjustForTableCells)
        r.move(0, -static_cast<RenderTableCell*>(o.containingBlock())->intrinsicPaddingTop());

    ts << " " << r;

    if (!(o.isText() && !o.isBR())) {
        if (o.parent() && (o.parent()->style()->color() != o.style()->color()))
            ts << " [color=" << o.style()->color().name() << "]";

        if (o.parent() && (o.parent()->style()->backgroundColor() != o.style()->backgroundColor()) &&
            o.style()->backgroundColor().isValid() && o.style()->backgroundColor().rgb())
            // Do not dump invalid or transparent backgrounds, since that is the default.
            ts << " [bgcolor=" << o.style()->backgroundColor().name() << "]";
        
        if (o.parent() && (o.parent()->style()->textFillColor() != o.style()->textFillColor()) &&
            o.style()->textFillColor().isValid() && o.style()->textFillColor() != o.style()->color() &&
            o.style()->textFillColor().rgb())
            ts << " [textFillColor=" << o.style()->textFillColor().name() << "]";

        if (o.parent() && (o.parent()->style()->textStrokeColor() != o.style()->textStrokeColor()) &&
            o.style()->textStrokeColor().isValid() && o.style()->textStrokeColor() != o.style()->color() &&
            o.style()->textStrokeColor().rgb())
            ts << " [textStrokeColor=" << o.style()->textStrokeColor().name() << "]";

        if (o.parent() && (o.parent()->style()->textStrokeWidth() != o.style()->textStrokeWidth()) &&
            o.style()->textStrokeWidth() > 0)
            ts << " [textStrokeWidth=" << o.style()->textStrokeWidth() << "]";

        if (!o.isBoxModelObject())
            return ts;

        const RenderBoxModelObject& box = *toRenderBoxModelObject(&o);
        if (box.borderTop() || box.borderRight() || box.borderBottom() || box.borderLeft()) {
            ts << " [border:";

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

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

            if (o.style()->borderBottom() != prevBorder) {
                prevBorder = box.style()->borderBottom();