html_elementimpl.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

// -*- c-basic-offset: 4; -*-
/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll ([e-mail])
 *           (C) 1999 Antti Koivisto ([e-mail])
 *           (C) 2003 Dirk Mueller ([e-mail])
 * Copyright (C) 2002 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */
// -------------------------------------------------------------------------
//#define DEBUG
//#define DEBUG_LAYOUT
//#define PAR_DEBUG
//#define EVENT_DEBUG
//#define UNSUPPORTED_ATTR

#include "html/dtd.h"
#include "html/html_elementimpl.h"
#include "html/html_documentimpl.h"
#include "html/htmltokenizer.h"

#include "misc/htmlhashes.h"

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

#include "rendering/render_object.h"
#include "rendering/render_replaced.h"
#include "css/css_valueimpl.h"
#include "css/css_stylesheetimpl.h"
#include "css/cssproperties.h"
#include "css/cssvalues.h"
#include "xml/dom_textimpl.h"
#include "xml/dom2_eventsimpl.h"

#include <kdebug.h>
#include <kglobal.h>
#include "html_elementimpl.h"

using namespace DOM;
using namespace khtml;

HTMLElementImpl::HTMLElementImpl(DocumentPtr *doc)
    : ElementImpl( doc )
{
    m_htmlCompat = doc && doc->document() ? doc->document()->htmlMode() != DocumentImpl::XHtml : false;
}

HTMLElementImpl::~HTMLElementImpl()
{
}

bool HTMLElementImpl::isInline() const
{
    if (renderer())
        return ElementImpl::isInline();

    switch(id()) {
        case ID_A:
        case ID_FONT:
        case ID_TT:
        case ID_U:
        case ID_B:
        case ID_I:
        case ID_S:
        case ID_STRIKE:
        case ID_BIG:
        case ID_SMALL:

            // %phrase
        case ID_EM:
        case ID_STRONG:
        case ID_DFN:
        case ID_CODE:
        case ID_SAMP:
        case ID_KBD:
        case ID_VAR:
        case ID_CITE:
        case ID_ABBR:
        case ID_ACRONYM:

            // %special
        case ID_SUB:
        case ID_SUP:
        case ID_SPAN:
        case ID_NOBR:
        case ID_WBR:
            return true;

        default:
            return ElementImpl::isInline();
    }
}

DOMString HTMLElementImpl::namespaceURI() const
{
    return (!m_htmlCompat) ?
        DOMString(XHTML_NAMESPACE) : DOMString();
}


DOMString HTMLElementImpl::localName() const
{
    // We only have a localName if we were created by createElementNS(), in which
    // case we are an XHTML element. This also means we have a lowercase name.
    if (!m_htmlCompat) // XHTML == not HTMLCompat
    {
        NodeImpl::Id _id = id();
        DOMString tn;
        if ( _id >= ID_LAST_TAG )
            tn = getDocument()->getName(ElementId, _id);
        else // HTML tag
            tn = getTagName( _id );
	return tn; // lowercase already
    }
    // createElement() always returns elements with a null localName.
    else
	return DOMString();
}

DOMString HTMLElementImpl::tagName() const
{
    DOMString tn;
    NodeImpl::Id _id = id();
    if ( _id >= ID_LAST_TAG )
        tn = getDocument()->getName(ElementId, _id);
    else // HTML tag
        tn = getTagName( _id );

    if ( m_htmlCompat )
        tn = tn.upper();

    if (m_prefix)
        return DOMString(m_prefix) + ":" + tn;

    return tn;
}

void HTMLElementImpl::parseAttribute(AttributeImpl *attr)
{
    DOMString indexstring;
    switch( attr->id() )
    {
    case ATTR_ALIGN:
        if (attr->val()) {
            if ( strcasecmp(attr->value(), "middle" ) == 0 )
                addCSSProperty( CSS_PROP_TEXT_ALIGN, CSS_VAL_CENTER );
            else
                addCSSProperty(CSS_PROP_TEXT_ALIGN, attr->value().lower());
        }
        else
            removeCSSProperty(CSS_PROP_TEXT_ALIGN);
        break;
// the core attributes...
    case ATTR_ID:
        // unique id
        setHasID();
        setChanged(); // in case of a CSS selector on id
        getDocument()->incDOMTreeVersion();
        break;
    case ATTR_CLASS:
    case ATTR_NAME:
        setChanged(); // in case of a CSS selector on class/name
        getDocument()->incDOMTreeVersion();
        break;
    case ATTR_STYLE:
        setHasStyle();
        if (m_styleDecls)
	    m_styleDecls->removeCSSHints();
	else
	    createDecl();
        m_styleDecls->setProperty(attr->value());
        setChanged();
        break;
    case ATTR_TABINDEX:
        indexstring=getAttribute(ATTR_TABINDEX);
        if (indexstring.length())
            setTabIndex(indexstring.toInt());
        break;
// i18n attributes
    case ATTR_LANG:
        break;
    case ATTR_DIR:
        addCSSProperty(CSS_PROP_DIRECTION, attr->value().lower());
        addCSSProperty(CSS_PROP_UNICODE_BIDI, CSS_VAL_EMBED);
        break;
// standard events
    case ATTR_ONCLICK:
	setHTMLEventListener(EventImpl::KHTML_ECMA_CLICK_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onclick", this));
        break;
    case ATTR_ONDBLCLICK:
	setHTMLEventListener(EventImpl::KHTML_ECMA_DBLCLICK_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "ondblclick", this));
        break;
    case ATTR_ONMOUSEDOWN:
        setHTMLEventListener(EventImpl::MOUSEDOWN_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onmousedown", this));
        break;
    case ATTR_ONMOUSEMOVE:
        setHTMLEventListener(EventImpl::MOUSEMOVE_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onmousemove", this));
        break;
    case ATTR_ONMOUSEOUT:
        setHTMLEventListener(EventImpl::MOUSEOUT_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onmouseout", this));
        break;
    case ATTR_ONMOUSEOVER:
        setHTMLEventListener(EventImpl::MOUSEOVER_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onmouseover", this));
        break;
    case ATTR_ONMOUSEUP:
        setHTMLEventListener(EventImpl::MOUSEUP_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onmouseup", this));
        break;
    case ATTR_ONKEYDOWN:
        setHTMLEventListener(EventImpl::KEYDOWN_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onkeydown", this));
	break;
    case ATTR_ONKEYPRESS:
        setHTMLEventListener(EventImpl::KEYPRESS_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onkeypress", this));
	break;
    case ATTR_ONKEYUP:
        setHTMLEventListener(EventImpl::KEYUP_EVENT,
	    getDocument()->createHTMLEventListener(attr->value().string(), "onkeyup", this));
        break;
    case ATTR_ONFOCUS:
        setHTMLEventListener(EventImpl::FOCUS_EVENT,
            getDocument()->createHTMLEventListener(attr->value().string(), "onfocus", this));
        break;
    case ATTR_ONBLUR:
        setHTMLEventListener(EventImpl::BLUR_EVENT,
            getDocument()->createHTMLEventListener(attr->value().string(), "onblur", this));
        break;
// other misc attributes
    default:
#ifdef UNSUPPORTED_ATTR
	kdDebug(6030) << "UATTR: <" << this->nodeName().string() << "> ["
		      << attr->name().string() << "]=[" << attr->value().string() << "]" << endl;
#endif
        break;
    }
}

void HTMLElementImpl::recalcStyle( StyleChange ch )
{
    ElementImpl::recalcStyle( ch );

    if (m_render /*&& changed*/)
        m_render->updateFromElement();
}

void HTMLElementImpl::addCSSProperty(int id, const DOMString &value)
{
    if(!m_styleDecls) createDecl();
    m_styleDecls->setProperty(id, value, false, true);
    setChanged();
}

void HTMLElementImpl::addCSSProperty(int id, int value)
{
    if(!m_styleDecls) createDecl();
    m_styleDecls->setProperty(id, value, false, true);
    setChanged();
}

void HTMLElementImpl::addCSSLength(int id, const DOMString &value, bool numOnly, bool multiLength)
{
    if(!m_styleDecls) createDecl();

    // strip attribute garbage to avoid CSS parsing errors
    // ### create specialized hook that avoids parsing every
    // value twice!
    if ( value.implementation() ) {
        // match \s*[+-]?\d*(\.\d*)?[%\*]?
        unsigned i = 0, j = 0;
        QChar* s = value.implementation()->s;
        unsigned l = value.implementation()->l;

        while (i < l && s[i].isSpace())
            ++i;
        if (i < l && (s[i] == '+' || s[i] == '-'))
            ++i;
        while (i < l && s[i].isDigit())
            ++i,++j;

        // no digits!
        if (j == 0) return;

        int v = kClamp( QConstString(s, i).string().toInt(), -8192, 8191 ) ;
        const char* suffix = "px";
        if (!numOnly || multiLength) {
            // look if we find a % or *
            while (i < l) {
                if (multiLength && s[i] == '*') {
                    suffix = "";
                    break;
                }
                if (s[i] == '%') {
                    suffix = "%";
                    break;
                }
                ++i;
            }
        }
	if (numOnly) suffix = "";

        QString ns = QString::number(v) + suffix;
        m_styleDecls->setLengthProperty( id, DOMString( ns ), false, true, multiLength );
        setChanged();
        return;
    }

    m_styleDecls->setLengthProperty(id, value, false, true, multiLength);
    setChanged();
}