/*

 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

 *

 * 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.

 *

 * Portions are Copyright (C) 2002 Netscape Communications Corporation.

 * Other contributors: David Baron <dbaron@fas.harvard.edu>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 * Alternatively, the document type parsing portions of this file may be used

 * under the terms of either the Mozilla Public License Version 1.1, found at

 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public

 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html

 * (the "GPL"), in which case the provisions of the MPL or the GPL are

 * applicable instead of those above.  If you wish to allow use of your

 * version of this file only under the terms of one of those two

 * licenses (the MPL or the GPL) and not to allow others to use your

 * version of this file under the LGPL, indicate your decision by

 * deleting the provisions above and replace them with the notice and

 * other provisions required by the MPL or the GPL, as the case may be.

 * If you do not delete the provisions above, a recipient may use your

 * version of this file under any of the LGPL, the MPL or the GPL.

 */

#include "config.h"

#include "HTMLDocument.h"

#include "CSSPropertyNames.h"

#include "CSSStyleSelector.h"

#include "CookieJar.h"

#include "DocumentLoader.h"

#include "DocumentType.h"

#include "ExceptionCode.h"

#include "FocusController.h"

#include "Frame.h"

#include "FrameLoader.h"

#include "FrameTree.h"

#include "FrameView.h"

#include "HTMLDocumentParser.h"

#include "HTMLBodyElement.h"

#include "HTMLElementFactory.h"

#include "HTMLNames.h"

#include "LegacyHTMLDocumentParser.h"

#include "InspectorController.h"

#include "KURL.h"

#include "Page.h"

#include "Settings.h"

#include <wtf/text/CString.h>

#include "DocTypeStrings.cpp"

namespace WebCore {

using namespace HTMLNames;

HTMLDocument::HTMLDocument(Frame* frame, const KURL& url)

    : Document(frame, url, false, true)

{

    clearXMLVersion();

    setParseMode(Compat);

}

HTMLDocument::~HTMLDocument()

{

}

int HTMLDocument::width()

{

    updateLayoutIgnorePendingStylesheets();

    FrameView* frameView = view();

    return frameView ? frameView->contentsWidth() : 0;

}

int HTMLDocument::height()

{

    updateLayoutIgnorePendingStylesheets();

    FrameView* frameView = view();

    return frameView ? frameView->contentsHeight() : 0;

}

String HTMLDocument::dir()

{

    HTMLElement* b = body();

    if (!b)

        return String();

    return b->getAttribute(dirAttr);

}

void HTMLDocument::setDir(const String& value)

{

    HTMLElement* b = body();

    if (b)

        b->setAttribute(dirAttr, value);

}

String HTMLDocument::designMode() const

{

    return inDesignMode() ? "on" : "off";

}

void HTMLDocument::setDesignMode(const String& value)

{

    InheritedBool mode;

    if (equalIgnoringCase(value, "on"))

        mode = on;

    else if (equalIgnoringCase(value, "off"))

        mode = off;

    else

        mode = inherit;

    Document::setDesignMode(mode);

}

String HTMLDocument::compatMode() const

{

    return inCompatMode() ? "BackCompat" : "CSS1Compat";

}

Element* HTMLDocument::activeElement()

{

    if (Node* node = focusedNode())

        if (node->isElementNode())

            return static_cast<Element*>(node);

    return body();

}

bool HTMLDocument::hasFocus()

{

    Page* page = this->page();

    if (!page)

        return false;

    if (!page->focusController()->isActive())

        return false;

    if (Frame* focusedFrame = page->focusController()->focusedFrame()) {

        if (focusedFrame->tree()->isDescendantOf(frame()))

            return true;

    }

    return false;

}

String HTMLDocument::bgColor()

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (!bodyElement)

        return String();

    return bodyElement->bgColor();

}

void HTMLDocument::setBgColor(const String& value)

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (bodyElement)

        bodyElement->setBgColor(value);

}

String HTMLDocument::fgColor()

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (!bodyElement)

        return String();

    return bodyElement->text();

}

void HTMLDocument::setFgColor(const String& value)

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (bodyElement)

        bodyElement->setText(value);

}

String HTMLDocument::alinkColor()

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (!bodyElement)

        return String();

    return bodyElement->aLink();

}

void HTMLDocument::setAlinkColor(const String& value)

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (bodyElement) {

        // This check is a bit silly, but some benchmarks like to set the

        // document's link colors over and over to the same value and we

        // don't want to incur a style update each time.

        if (bodyElement->aLink() != value)

            bodyElement->setALink(value);

    }

}

String HTMLDocument::linkColor()

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (!bodyElement)

        return String();

    return bodyElement->link();

}

void HTMLDocument::setLinkColor(const String& value)

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (bodyElement) {

        // This check is a bit silly, but some benchmarks like to set the

        // document's link colors over and over to the same value and we

        // don't want to incur a style update each time.

        if (bodyElement->link() != value)

            bodyElement->setLink(value);

    }

}

String HTMLDocument::vlinkColor()

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (!bodyElement)

        return String();

    return bodyElement->vLink();

}

void HTMLDocument::setVlinkColor(const String& value)

{

    HTMLElement* b = body();

    HTMLBodyElement* bodyElement = (b && b->hasTagName(bodyTag)) ? static_cast<HTMLBodyElement*>(b) : 0;

    if (bodyElement) {

        // This check is a bit silly, but some benchmarks like to set the

        // document's link colors over and over to the same value and we

        // don't want to incur a style update each time.

        if (bodyElement->vLink() != value)

            bodyElement->setVLink(value);

    }

}

void HTMLDocument::captureEvents()

{

}

void HTMLDocument::releaseEvents()

{

}

DocumentParser* HTMLDocument::createParser()

{

    bool reportErrors = false;

#if ENABLE(INSPECTOR)

    if (Page* page = this->page())

        reportErrors = page->inspectorController()->windowVisible();

#endif

    if (settings() && settings()->html5ParserEnabled())

        return new HTMLDocumentParser(this, reportErrors);

    return new LegacyHTMLDocumentParser(this, reportErrors);

}

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

// not part of the DOM

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

bool HTMLDocument::childAllowed(Node *newChild)

{

    return newChild->hasTagName(htmlTag) || newChild->isCommentNode() || (newChild->nodeType() == DOCUMENT_TYPE_NODE && !doctype());

}

PassRefPtr<Element> HTMLDocument::createElement(const AtomicString& name, ExceptionCode& ec)

{

    if (!isValidName(name)) {

        ec = INVALID_CHARACTER_ERR;

        return 0;

    }

    return HTMLElementFactory::createHTMLElement(QualifiedName(nullAtom, name.lower(), xhtmlNamespaceURI), this, 0, false);

}

void HTMLDocument::addItemToMap(HashCountedSet<AtomicStringImpl*>& map, const AtomicString& name)

{

    if (name.isEmpty())

        return;

    map.add(name.impl());

    if (Frame* f = frame())

        f->script()->namedItemAdded(this, name);

}

void HTMLDocument::removeItemFromMap(HashCountedSet<AtomicStringImpl*>& map, const AtomicString& name)

{

    if (name.isEmpty())

        return;

    if (Frame* f = frame())

        f->script()->namedItemRemoved(this, name);

    map.remove(name.impl());

}

void HTMLDocument::addNamedItem(const AtomicString& name)

{

    addItemToMap(m_namedItemCounts, name);

}

void HTMLDocument::removeNamedItem(const AtomicString& name)

{ 

    removeItemFromMap(m_namedItemCounts, name);

}

void HTMLDocument::addExtraNamedItem(const AtomicString& name)

{

    addItemToMap(m_extraNamedItemCounts, name);

}

void HTMLDocument::removeExtraNamedItem(const AtomicString& name)

{ 

    removeItemFromMap(m_extraNamedItemCounts, name);

}

void HTMLDocument::determineParseMode()

{

    // FIXME: It's terrible that this code runs separately and isn't just built in to the

    // HTML tokenizer/parser.

    // This code more or less mimics Mozilla's implementation (specifically the

    // doctype parsing implemented by David Baron in Mozilla's nsParser.cpp).

    //

    // There are three possible parse modes:

    // COMPAT - quirks mode emulates WinIE and NS4.  CSS parsing is also relaxed in this mode, e.g., unit types can

    // be omitted from numbers.

    // ALMOST STRICT - This mode is identical to strict mode except for its treatment of line-height in the inline box model.  For

    // now (until the inline box model is re-written), this mode is identical to STANDARDS mode.

    // STRICT - no quirks apply.  Web pages will obey the specifications to the letter.

    bool wasInCompatMode = inCompatMode();

    DocumentType* docType = doctype();

    if (!docType || !equalIgnoringCase(docType->name(), "html"))

        // No doctype found at all or the doctype is not HTML.  Default to quirks mode and Html4.

        setParseMode(Compat);

    else if (!doctype()->systemId().isEmpty() && equalIgnoringCase(docType->systemId(), "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"))

        // Assume quirks mode for this particular system ID.  In the HTML5 spec, this is the only

        // system identifier that is examined.

        setParseMode(Compat);

    else if (docType->publicId().isEmpty())

        // A doctype without a public ID means use strict mode.

        setParseMode(Strict);

    else {

        // We have to check a list of public IDs to see what we

        // should do.

        String lowerPubID = docType->publicId().lower();

        CString pubIDStr = lowerPubID.latin1();

        // Look up the entry in our gperf-generated table.

        const PubIDInfo* doctypeEntry = findDoctypeEntry(pubIDStr.data(), pubIDStr.length());

        if (!doctypeEntry)

            // The DOCTYPE is not in the list.  Assume strict mode.

            setParseMode(Strict);

        else {

            switch (docType->systemId().isEmpty() ?

                    doctypeEntry->mode_if_no_sysid :

                    doctypeEntry->mode_if_sysid) {

                case PubIDInfo::eQuirks3:

                case PubIDInfo::eQuirks:

                    setParseMode(Compat);

                    break;

                case PubIDInfo::eAlmostStandards:

                    setParseMode(AlmostStrict);

                    break;

                 default:

                    ASSERT(false);

            }

        }

    }

    if (inCompatMode() != wasInCompatMode) {

        clearPageUserSheet();

        clearPageGroupUserSheets();

        updateStyleSelector();

    }

}

void HTMLDocument::clear()

{

    // FIXME: This does nothing, and that seems unlikely to be correct.

    // We've long had a comment saying that IE doesn't support this.

    // But I do see it in the documentation for Mozilla.

}

bool HTMLDocument::isFrameSet() const

{

    HTMLElement* bodyElement = body();

    return bodyElement && bodyElement->renderer() && bodyElement->hasTagName(framesetTag);

}

}