html_baseimpl.cpp

khtml在gtk上的移植版本

/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2000 Simon Hausmann ([e-mail])
 *           (C) 2001 Dirk Mueller ([e-mail])
 * Copyright (C) 2003 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
// -------------------------------------------------------------------------

#include "html/html_baseimpl.h"
#include "html/html_documentimpl.h"

#include "khtmlview.h"
#include "khtml_part.h"

#include "rendering/render_frames.h"
#include "css/cssstyleselector.h"
#include "css/css_stylesheetimpl.h"
#include "css/cssproperties.h"
#include "css/cssvalues.h"
#include "css/csshelper.h"
#include "misc/loader.h"
#include "misc/htmlhashes.h"
#include "dom/dom_string.h"
#include "dom/dom_doc.h"
#include "xml/dom2_eventsimpl.h"

#include <kurl.h>
#include <kdebug.h>

using namespace DOM;
using namespace khtml;

HTMLBodyElementImpl::HTMLBodyElementImpl(DocumentPtr *doc)
    : HTMLElementImpl(doc), m_linkDecl(0)
{
}

HTMLBodyElementImpl::~HTMLBodyElementImpl()
{
    if (m_linkDecl) {
        m_linkDecl->setParent(0);
        m_linkDecl->deref();
    }
}

NodeImpl::Id HTMLBodyElementImpl::id() const
{
    return ID_BODY;
}

void HTMLBodyElementImpl::createLinkDecl()
{
    m_linkDecl = new CSSStyleDeclarationImpl(0);
    m_linkDecl->ref();
    m_linkDecl->setParent(getDocument()->elementSheet());
    m_linkDecl->setNode(this);
    m_linkDecl->setStrictParsing(!getDocument()->inCompatMode());
}

bool HTMLBodyElementImpl::mapToEntry(NodeImpl::Id attr, MappedAttributeEntry& result) const
{
    switch(attr)
    {
        case ATTR_BACKGROUND:
        case ATTR_BGCOLOR:
        case ATTR_TEXT:
        case ATTR_MARGINWIDTH:
        case ATTR_LEFTMARGIN:
        case ATTR_MARGINHEIGHT:
        case ATTR_TOPMARGIN:
        case ATTR_BGPROPERTIES:
            result = eUniversal;
            return false;
        default:
            break;
    }
    
    return HTMLElementImpl::mapToEntry(attr, result);
}

void HTMLBodyElementImpl::parseHTMLAttribute(HTMLAttributeImpl *attr)
{
    switch(attr->id())
    {
    case ATTR_BACKGROUND:
    {
        QString url = khtml::parseURL( attr->value() ).string();
        if (!url.isEmpty())
            addCSSImageProperty(attr, CSS_PROP_BACKGROUND_IMAGE, getDocument()->completeURL(url));
        break;
    }
    case ATTR_MARGINWIDTH:
        addCSSLength(attr, CSS_PROP_MARGIN_RIGHT, attr->value() );
        /* nobreak; */
    case ATTR_LEFTMARGIN:
        addCSSLength(attr, CSS_PROP_MARGIN_LEFT, attr->value() );
        break;
    case ATTR_MARGINHEIGHT:
        addCSSLength(attr, CSS_PROP_MARGIN_BOTTOM, attr->value());
        /* nobreak */
    case ATTR_TOPMARGIN:
        addCSSLength(attr, CSS_PROP_MARGIN_TOP, attr->value());
        break;
    case ATTR_BGCOLOR:
        addHTMLColor(attr, CSS_PROP_BACKGROUND_COLOR, attr->value());
        break;
    case ATTR_TEXT:
        addHTMLColor(attr, CSS_PROP_COLOR, attr->value());
        break;
    case ATTR_BGPROPERTIES:
        if ( strcasecmp( attr->value(), "fixed" ) == 0)
            addCSSProperty(attr, CSS_PROP_BACKGROUND_ATTACHMENT, CSS_VAL_FIXED);
        break;
    case ATTR_VLINK:
    case ATTR_ALINK:
    case ATTR_LINK:
    {
        if (attr->isNull()) {
            if (attr->id() == ATTR_LINK)
                getDocument()->resetLinkColor();
            else if (attr->id() == ATTR_VLINK)
                getDocument()->resetVisitedLinkColor();
            else
                getDocument()->resetActiveLinkColor();
        }
        else {
            if (!m_linkDecl)
                createLinkDecl();
            m_linkDecl->setProperty(CSS_PROP_COLOR, attr->value(), false, false);
            CSSValueImpl* val = m_linkDecl->getPropertyCSSValue(CSS_PROP_COLOR);
            if (val && val->isPrimitiveValue()) {
                QColor col = getDocument()->styleSelector()->getColorFromPrimitiveValue(static_cast<CSSPrimitiveValueImpl*>(val));
                if (attr->id() == ATTR_LINK)
                    getDocument()->setLinkColor(col);
                else if (attr->id() == ATTR_VLINK)
                    getDocument()->setVisitedLinkColor(col);
                else
                    getDocument()->setActiveLinkColor(col);
            }
        }
        
        if (attached())
            getDocument()->recalcStyle(Force);
        break;
    }
    case ATTR_ONLOAD:
        getDocument()->setHTMLWindowEventListener(EventImpl::LOAD_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONUNLOAD:
        getDocument()->setHTMLWindowEventListener(EventImpl::UNLOAD_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONBLUR:
        getDocument()->setHTMLWindowEventListener(EventImpl::BLUR_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONFOCUS:
        getDocument()->setHTMLWindowEventListener(EventImpl::FOCUS_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONRESIZE:
        getDocument()->setHTMLWindowEventListener(EventImpl::RESIZE_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONSCROLL:
        getDocument()->setHTMLWindowEventListener(EventImpl::SCROLL_EVENT,
                                                  getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_NOSAVE:
	break;
    default:
        HTMLElementImpl::parseHTMLAttribute(attr);
    }
}

void HTMLBodyElementImpl::insertedIntoDocument()
{
    HTMLElementImpl::insertedIntoDocument();

    // FIXME: perhaps all this stuff should be in attach() instead of here...

    KHTMLView* w = getDocument()->view();
    if (w && w->marginWidth() != -1) {
        QString s;
        s.sprintf( "%d", w->marginWidth() );
        setAttribute(ATTR_MARGINWIDTH, s);
    }
    if (w && w->marginHeight() != -1) {
        QString s;
        s.sprintf( "%d", w->marginHeight() );
        setAttribute(ATTR_MARGINHEIGHT, s);
    }
}

bool HTMLBodyElementImpl::isURLAttribute(AttributeImpl *attr) const
{
    return attr->id() == ATTR_BACKGROUND;
}

// -------------------------------------------------------------------------

HTMLFrameElementImpl::HTMLFrameElementImpl(DocumentPtr *doc)
    : HTMLElementImpl(doc)
{
    frameBorder = true;
    frameBorderSet = false;
    marginWidth = -1;
    marginHeight = -1;
    scrolling = QScrollView::Auto;
    noresize = false;
}

HTMLFrameElementImpl::~HTMLFrameElementImpl()
{
}

NodeImpl::Id HTMLFrameElementImpl::id() const
{
    return ID_FRAME;
}

bool HTMLFrameElementImpl::isURLAllowed(const AtomicString &URLString) const
{
    if (URLString.isEmpty()) {
        return true;
    }
    
    KHTMLView *w = getDocument()->view();

    if (!w) {
	return false;
    }

    KURL newURL(getDocument()->completeURL(URLString.string()));
    newURL.setRef(QString::null);

    // Don't allow more than 1000 total frames in a set. This seems
    // like a reasonable upper bound, and otherwise mutually recursive
    // frameset pages can quickly bring the program to its knees with
    // exponential growth in the number of frames.

    // FIXME: This limit could be higher, but WebKit has some
    // algorithms that happen while loading which appear to be N^2 or
    // worse in the number of frames
    if (w->part()->topLevelFrameCount() >= 200) {
	return false;
    }

    // Prohibit non-file URLs if we are asked to.
    if (w->part()->onlyLocalReferences() && newURL.protocol().lower() != "file") {
        return false;
    }

    // We allow one level of self-reference because some sites depend on that.
    // But we don't allow more than one.
    bool foundSelfReference = false;
    for (KHTMLPart *part = w->part(); part; part = part->parentPart()) {
        KURL partURL = part->url();
        partURL.setRef(QString::null);
        if (partURL == newURL) {
            if (foundSelfReference) {
                return false;
            }
            foundSelfReference = true;
        }
    }
    
    return true;
}

void HTMLFrameElementImpl::updateForNewURL()
{
    if (!attached()) {
        return;
    }
    
    // Handle the common case where we decided not to make a frame the first time.
    // Detach and the let attach() decide again whether to make the frame for this URL.
    if (!m_render) {
        detach();
        attach();
        return;
    }
    
    if (!isURLAllowed(url)) {
        return;
    }

    openURL();
}

void HTMLFrameElementImpl::openURL()
{
    KHTMLView *w = getDocument()->view();
    if (!w) {
        return;
    }
    
    AtomicString relativeURL = url;
    if (relativeURL.isEmpty()) {
        relativeURL = "about:blank";
    }

    // Load the frame contents.
    KHTMLPart *part = w->part();
    KHTMLPart *framePart = part->findFrame(name.string());
    if (framePart) {
        framePart->openURL(getDocument()->completeURL(relativeURL.string()));
    } else {
        part->requestFrame(static_cast<RenderFrame *>(m_render), relativeURL.string(), name.string());
    }
}


void HTMLFrameElementImpl::parseHTMLAttribute(HTMLAttributeImpl *attr)
{
    switch(attr->id())
    {
    case ATTR_SRC:
        setLocation(khtml::parseURL(attr->value()));
        break;
    case ATTR_ID:
        // Important to call through to base for ATTR_ID so the hasID bit gets set.
        HTMLElementImpl::parseHTMLAttribute(attr);
        // fall through
    case ATTR_NAME:
        name = attr->value();
        // FIXME: If we are already attached, this doesn't actually change the frame's name.
        // FIXME: If we are already attached, this doesn't check for frame name
        // conflicts and generate a unique frame name.
        break;
    case ATTR_FRAMEBORDER:
        frameBorder = attr->value().toInt();
        frameBorderSet = !attr->isNull();
        // FIXME: If we are already attached, this has no effect.
        break;
    case ATTR_MARGINWIDTH:
        marginWidth = attr->value().toInt();
        // FIXME: If we are already attached, this has no effect.
        break;
    case ATTR_MARGINHEIGHT:
        marginHeight = attr->value().toInt();
        // FIXME: If we are already attached, this has no effect.
        break;
    case ATTR_NORESIZE:
        noresize = true;
        // FIXME: If we are already attached, this has no effect.
        break;
    case ATTR_SCROLLING:
        kdDebug( 6031 ) << "set scroll mode" << endl;
	// Auto and yes both simply mean "allow scrolling."  No means
	// "don't allow scrolling."
        if( strcasecmp( attr->value(), "auto" ) == 0 ||
            strcasecmp( attr->value(), "yes" ) == 0 )
            scrolling = QScrollView::Auto;
        else if( strcasecmp( attr->value(), "no" ) == 0 )
            scrolling = QScrollView::AlwaysOff;
        // FIXME: If we are already attached, this has no effect.
        break;
    case ATTR_ONLOAD:
        setHTMLEventListener(EventImpl::LOAD_EVENT,
                                getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    case ATTR_ONUNLOAD:
        setHTMLEventListener(EventImpl::UNLOAD_EVENT,
                                getDocument()->createHTMLEventListener(attr->value().string()));
        break;
    default:
        HTMLElementImpl::parseHTMLAttribute(attr);