/**
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Simon Hausmann <hausmann@kde.org>
 * Copyright (C) 2003, 2006 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 "config.h"
#include "HTMLAnchorElement.h"

#include "Document.h"
#include "Event.h"
#include "EventNames.h"
#include "Frame.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
#include "KeyboardEvent.h"
#include "MouseEvent.h"
#include "MutationEvent.h"
#include "RenderFlow.h"
#include "RenderImage.h"
#include "UIEvent.h"
#include "csshelper.h"

namespace WebCore {

using namespace HTMLNames;
using namespace EventNames;

HTMLAnchorElement::HTMLAnchorElement(Document* doc)
    : HTMLElement(aTag, doc)
{
    m_hasTarget = false;
}

HTMLAnchorElement::HTMLAnchorElement(const QualifiedName& tagName, Document* doc)
    : HTMLElement(tagName, doc)
{
    m_hasTarget = false;
}

HTMLAnchorElement::~HTMLAnchorElement()
{
}

bool HTMLAnchorElement::supportsFocus() const
{
    if (isContentEditable())
        return HTMLElement::supportsFocus();
    return isFocusable() || (m_isLink && document() && !document()->haveStylesheetsLoaded());
}

bool HTMLAnchorElement::isFocusable() const
{
    if (isContentEditable())
        return HTMLElement::isFocusable();

    // FIXME: Even if we are not visible, we might have a child that is visible.
    // Dave wants to fix that some day with a "has visible content" flag or the like.
    if (!(m_isLink && renderer() && renderer()->style()->visibility() == VISIBLE))
        return false;

    // Before calling absoluteRects, check for the common case where the renderer
    // or one of the continuations is non-empty, since this is a faster check and
    // almost always returns true.
    for (RenderObject* r = renderer(); r; r = r->continuation())
        if (r->width() > 0 && r->height() > 0)
            return true;

    DeprecatedValueList<IntRect> rects;
    int x = 0, y = 0;
    renderer()->absolutePosition(x, y);
    renderer()->absoluteRects(rects, x, y);
    for (DeprecatedValueList<IntRect>::ConstIterator it = rects.begin(); it != rects.end(); ++it)
        if (!(*it).isEmpty())
            return true;

    return false;
}

bool HTMLAnchorElement::isMouseFocusable() const
{
    return false;
}

bool HTMLAnchorElement::isKeyboardFocusable() const
{
    if (!isFocusable())
        return false;
    
    if (!document()->frame())
        return false;

    return document()->frame()->tabsToLinks();
}

void HTMLAnchorElement::defaultEventHandler(Event *evt)
{
    // React on clicks and on keypresses.
    // Don't make this KEYUP_EVENT again, it makes khtml follow links it shouldn't,
    // when pressing Enter in the combo.
    if (m_isLink && (evt->type() == clickEvent || (evt->type() == keydownEvent && m_focused))) {
        MouseEvent* e = 0;
        if (evt->type() == clickEvent)
            e = static_cast<MouseEvent*>(evt);

        KeyboardEvent* k = 0;
        if (evt->type() == keydownEvent)
            k = static_cast<KeyboardEvent*>(evt);

        if (e && e->button() == 2) {
            HTMLElement::defaultEventHandler(evt);
            return;
        }

        if (e && !e->shiftKey() && isContentEditable()) {
            HTMLElement::defaultEventHandler(evt);
            return;
        }

        if (k) {
            if (k->keyIdentifier() != "Enter") {
                HTMLElement::defaultEventHandler(evt);
                return;
            }
            if (k->keyEvent()) {
                evt->setDefaultHandled();
                click(false);
                return;
            }
        }

        DeprecatedString url = parseURL(getAttribute(hrefAttr)).deprecatedString();
        String utarget = getAttribute(targetAttr);

        if (e && e->button() == 1)
            utarget = "_blank";

        if (evt->target()->hasTagName(imgTag)) {
            HTMLImageElement* img = static_cast<HTMLImageElement*>(evt->target());
            if (img && img->isServerMap()) {
                RenderImage* r = static_cast<RenderImage*>(img->renderer());
                if(r && e) {
                    int absx, absy;
                    r->absolutePosition(absx, absy);
                    int x = e->pageX() - absx;
                    int y = e->pageY() - absy;
                    url += "?";
                    url += DeprecatedString::number(x);
                    url += ",";
                    url += DeprecatedString::number(y);
                } else {
                    evt->setDefaultHandled();
                    HTMLElement::defaultEventHandler(evt);
                    return;
                }
            }
        }

        if (!evt->defaultPrevented() && document()->frame())
            document()->frame()->urlSelected(url, utarget);

        evt->setDefaultHandled();
    }

    HTMLElement::defaultEventHandler(evt);
}

void HTMLAnchorElement::setActive(bool down, bool pause)
{
    if (isContentEditable())
        return;
    ContainerNode::setActive(down, pause);
}

void HTMLAnchorElement::parseMappedAttribute(MappedAttribute *attr)
{
    if (attr->name() == hrefAttr)
        m_isLink = !attr->isNull();
    else if (attr->name() == targetAttr)
        m_hasTarget = !attr->isNull();
    else if (attr->name() == nameAttr ||
             attr->name() == titleAttr ||
             attr->name() == relAttr) {
        // Do nothing.
    } else
        HTMLElement::parseMappedAttribute(attr);
}

void HTMLAnchorElement::accessKeyAction(bool sendToAnyElement)
{
    // send the mouse button events iff the
    // caller specified sendToAnyElement
    click(sendToAnyElement);
}

bool HTMLAnchorElement::isURLAttribute(Attribute *attr) const
{
    return attr->name() == hrefAttr;
}

String HTMLAnchorElement::accessKey() const
{
    return getAttribute(accesskeyAttr);
}

void HTMLAnchorElement::setAccessKey(const String &value)
{
    setAttribute(accesskeyAttr, value);
}

String HTMLAnchorElement::charset() const
{
    return getAttribute(charsetAttr);
}

void HTMLAnchorElement::setCharset(const String &value)
{
    setAttribute(charsetAttr, value);
}

String HTMLAnchorElement::coords() const
{
    return getAttribute(coordsAttr);
}

void HTMLAnchorElement::setCoords(const String &value)
{
    setAttribute(coordsAttr, value);
}

String HTMLAnchorElement::href() const
{
    String href = getAttribute(hrefAttr);
    if (href.isNull())
        return href;
    return document()->completeURL(href);
}

void HTMLAnchorElement::setHref(const String &value)
{
    setAttribute(hrefAttr, value);
}

String HTMLAnchorElement::hreflang() const
{
    return getAttribute(hreflangAttr);
}

void HTMLAnchorElement::setHreflang(const String &value)
{
    setAttribute(hreflangAttr, value);
}

String HTMLAnchorElement::name() const
{
    return getAttribute(nameAttr);
}

void HTMLAnchorElement::setName(const String &value)
{
    setAttribute(nameAttr, value);
}

String HTMLAnchorElement::rel() const
{
    return getAttribute(relAttr);
}

void HTMLAnchorElement::setRel(const String &value)
{
    setAttribute(relAttr, value);
}

String HTMLAnchorElement::rev() const
{
    return getAttribute(revAttr);
}

void HTMLAnchorElement::setRev(const String &value)
{
    setAttribute(revAttr, value);
}

String HTMLAnchorElement::shape() const
{
    return getAttribute(shapeAttr);
}

void HTMLAnchorElement::setShape(const String &value)
{
    setAttribute(shapeAttr, value);
}

int HTMLAnchorElement::tabIndex() const
{
    return getAttribute(tabindexAttr).toInt();
}

void HTMLAnchorElement::setTabIndex(int tabIndex)
{
    setAttribute(tabindexAttr, String::number(tabIndex));
}

String HTMLAnchorElement::target() const
{
    return getAttribute(targetAttr);
}

void HTMLAnchorElement::setTarget(const String &value)
{
    setAttribute(targetAttr, value);
}

String HTMLAnchorElement::type() const
{
    return getAttribute(typeAttr);
}

void HTMLAnchorElement::setType(const String &value)
{
    setAttribute(typeAttr, value);
}

String HTMLAnchorElement::hash() const
{
    return '#' + KURL(href().deprecatedString()).ref();
}

String HTMLAnchorElement::host() const
{
    return KURL(href().deprecatedString()).host();
}

String HTMLAnchorElement::hostname() const
{
    KURL url(href().deprecatedString());
    if (url.port()==0)
        return url.host();
    else
        return url.host() + ":" + String::number(url.port());
}

String HTMLAnchorElement::pathname() const
{
    return KURL(href().deprecatedString()).path();
}

String HTMLAnchorElement::port() const
{
    return DeprecatedString::number(KURL(href().deprecatedString()).port());
}

String HTMLAnchorElement::protocol() const
{
    return KURL(href().deprecatedString()).protocol() + ":";
}

String HTMLAnchorElement::search() const
{
    return KURL(href().deprecatedString()).query();
}

String HTMLAnchorElement::text() const
{
    document()->updateLayoutIgnorePendingStylesheets();
    return innerText();
}


bool HTMLAnchorElement::willRespondToMouseClickEvents()
{
    return HTMLElement::willRespondToMouseClickEvents() || isLink();    
}


}