/*

 * 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, 2007 Apple Inc. All rights reserved.

 *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)

 *

 * 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.

 */

#include "config.h"

#include "HTMLAnchorElement.h"

#include "Document.h"

#include "Event.h"

#include "EventHandler.h"

#include "EventNames.h"

#include "Frame.h"

#include "FrameLoader.h"

#include "HTMLImageElement.h"

#include "HTMLNames.h"

#include "KeyboardEvent.h"

#include "MouseEvent.h"

#include "MutationEvent.h"

#include "RenderFlow.h"

#include "RenderImage.h"

#include "ResourceRequest.h"

#include "SelectionController.h"

#include "Settings.h"

#include "UIEvent.h"

#if PLATFORM(SYMBIAN)

#include "SoundStartSymbian.h"

#endif

namespace WebCore {

using namespace HTMLNames;

using namespace EventNames;

HTMLAnchorElement::HTMLAnchorElement(Document* doc)

    : HTMLElement(aTag, doc)

    , m_rootEditableElementForSelectionOnMouseDown(0)

    , m_wasShiftKeyDownOnMouseDown(false)

#if PLATFORM(SYMBIAN)

    , m_soundstart(0)

#endif            

{

}

HTMLAnchorElement::HTMLAnchorElement(const QualifiedName& tagName, Document* doc)

    : HTMLElement(tagName, doc)

    , m_rootEditableElementForSelectionOnMouseDown(0)

    , m_wasShiftKeyDownOnMouseDown(false)

#if PLATFORM(SYMBIAN)

    , m_soundstart(0)

#endif            

{

}

HTMLAnchorElement::~HTMLAnchorElement()

{

#if PLATFORM(SYMBIAN)

    delete m_soundstart;

#endif        

}

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;

    Vector<IntRect> rects;

    int x, y;

    renderer()->absolutePosition(x, y);

    renderer()->absoluteRects(rects, x, y);

    size_t n = rects.size();

    for (size_t i = 0; i < n; ++i)

        if (!rects[i].isEmpty())

            return true;

    return false;

}

bool HTMLAnchorElement::isMouseFocusable() const

{

    return false;

}

bool HTMLAnchorElement::isKeyboardFocusable(KeyboardEvent* event) const

{

    if (!isFocusable())

        return false;

    if (!document()->frame())

        return false;

    return document()->frame()->eventHandler()->tabsToLinks(event);

}

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 PLATFORM(SYMBIAN)

        if (evt->type() == clickEvent && evt->isMouseEvent()) {

            e = static_cast<MouseEvent*>(evt);

            if (m_soundstart) {

                m_soundstart->OnClick(document()->frame());

            }

        }

#else 

        if (evt->type() == clickEvent && evt->isMouseEvent())

            e = static_cast<MouseEvent*>(evt);

#endif   

        KeyboardEvent* k = 0;

        if (evt->type() == keydownEvent && evt->isKeyboardEvent())

            k = static_cast<KeyboardEvent*>(evt);

        if (e && e->button() == RightButton) {

            HTMLElement::defaultEventHandler(evt);

            return;

        }

        // If the link is editable, then we need to check the settings to see whether or not to follow the link

        if (isContentEditable()) {

            EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;

            if (Settings* settings = document()->settings())

                editableLinkBehavior = settings->editableLinkBehavior();

            switch (editableLinkBehavior) {

                // Always follow the link (Safari 2.0 behavior)

                default:

                case EditableLinkDefaultBehavior:

                case EditableLinkAlwaysLive:

                    break;

                case EditableLinkNeverLive:

                    HTMLElement::defaultEventHandler(evt);

                    return;

                // If the selection prior to clicking on this link resided in the same editable block as this link,

                // and the shift key isn't pressed, we don't want to follow the link

                case EditableLinkLiveWhenNotFocused:

                    if (e && !e->shiftKey() && m_rootEditableElementForSelectionOnMouseDown == rootEditableElement()) {

                        HTMLElement::defaultEventHandler(evt);

                        return;

                    }

                    break;

                // Only follow the link if the shift key is down (WinIE/Firefox behavior)

                case EditableLinkOnlyLiveWithShiftKey:

                    if (e && !e->shiftKey()) {

                        HTMLElement::defaultEventHandler(evt);

                        return;

                    }

                    break;

            }

        }

        if (k) {

            if (k->keyIdentifier() != "Enter") {

                HTMLElement::defaultEventHandler(evt);

                return;

            }

            evt->setDefaultHandled();

            dispatchSimulatedClick(evt);

            return;

        }

        String url = parseURL(getAttribute(hrefAttr));

#if PLATFORM(SYMBIAN)

        if (!getAttribute(ctiAttr).isNull()) {

            String number("wtai://wp/mc;");

            number.append(getAttribute(ctiAttr).domString().stripWhiteSpace());

            url = number.deprecatedString();            

        }

#endif

        ASSERT(evt->target());

        ASSERT(evt->target()->toNode());

        if (evt->target()->toNode()->hasTagName(imgTag)) {

            HTMLImageElement* img = static_cast<HTMLImageElement*>(evt->target()->toNode());

            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()->loader()->urlSelected(document()->completeURL(url), getAttribute(targetAttr), evt, false, true);

        evt->setDefaultHandled();

    } else if (m_isLink && isContentEditable()) {

    // This keeps track of the editable block that the selection was in (if it was in one) just before the link was clicked

    // for the LiveWhenNotFocused editable link behavior

        if (evt->type() == mousedownEvent && evt->isMouseEvent() && static_cast<MouseEvent*>(evt)->button() != RightButton && document()->frame() && document()->frame()->selectionController()) {

            MouseEvent* e = static_cast<MouseEvent*>(evt);

            m_rootEditableElementForSelectionOnMouseDown = document()->frame()->selectionController()->rootEditableElement();

            m_wasShiftKeyDownOnMouseDown = e && e->shiftKey();

        } else if (evt->type() == mouseoverEvent) {

        // These are cleared on mouseover and not mouseout because their values are needed for drag events, but these happen

        // after mouse out events.

            m_rootEditableElementForSelectionOnMouseDown = 0;

            m_wasShiftKeyDownOnMouseDown = false;

        }

    }

    HTMLElement::defaultEventHandler(evt);

}

void HTMLAnchorElement::setActive(bool down, bool pause)

{

    if (isContentEditable()) {

        EditableLinkBehavior editableLinkBehavior = EditableLinkDefaultBehavior;

        if (Settings* settings = document()->settings())

            editableLinkBehavior = settings->editableLinkBehavior();

        switch(editableLinkBehavior) {

            default:

            case EditableLinkDefaultBehavior:

            case EditableLinkAlwaysLive:

                break;

            case EditableLinkNeverLive:

                return;

            // Don't set the link to be active if the current selection is in the same editable block as

            // this link

            case EditableLinkLiveWhenNotFocused:

                if (down && document()->frame() && document()->frame()->selectionController() &&

                    document()->frame()->selectionController()->rootEditableElement() == rootEditableElement())

                    return;

                break;

            case EditableLinkOnlyLiveWithShiftKey:

                return;

        }

    }

    ContainerNode::setActive(down, pause);

}

void HTMLAnchorElement::parseMappedAttribute(MappedAttribute *attr)

{

    if (attr->name() == hrefAttr) {

        bool wasLink = m_isLink;

        m_isLink = !attr->isNull();

        if (wasLink != m_isLink)

            setChanged();

#if PLATFORM(SYMBIAN)

        if (!attr->value().isNull() &&

            attr->value().startsWith("tel:")) {                                    

            m_isLink = checkTelWtaiNumber(attr->value().domString().substring(4),false);                

        }

#endif  

    } else if (attr->name() == nameAttr ||

             attr->name() == titleAttr ||

             attr->name() == relAttr) {

        // Do nothing.

    }        

#if PLATFORM(SYMBIAN)

    else if (attr->name() == ctiAttr) {

        if (!attr->value().isNull()) {

            m_isLink = checkTelWtaiNumber(attr->value().domString().substring(4),true);                

        }

    }

    else if (attr->name() == telbookAttr || 

                attr->name() == emailAttr) {

        // do nothing.

    }        

    else if (attr->name() == soundstartAttr) {

        if (!m_soundstart) {

            m_soundstart = new SoundStart();

            if (!m_soundstart) return;

        }        

        m_soundstart->SetStartAttribute(attr->value());

    }

    else if (attr->name() == srcAttr) {

        if (!m_soundstart) {

            m_soundstart = new SoundStart();

            if (!m_soundstart) return;

        }

        m_soundstart->SetSrcAttribute(attr->value());

    }

    else if (attr->name() == loopAttr) {

        if (!m_soundstart) {

            m_soundstart = new SoundStart();

            if (!m_soundstart) return;

        }                        

        m_soundstart->SetLoopAttribute(attr->value());

    }

    else if (attr->name() == volumeAttr) {

        if (!m_soundstart) {

            m_soundstart = new SoundStart();

            if (!m_soundstart) return;

        }

        m_soundstart->SetVolumeAttribute(attr->value());

    }    

#endif          

    else {

        HTMLElement::parseMappedAttribute(attr);

    }

}

void HTMLAnchorElement::accessKeyAction(bool sendToAnyElement)

{

    // send the mouse button events if the caller specified sendToAnyElement

    dispatchSimulatedClick(0, sendToAnyElement);

}

bool HTMLAnchorElement::isURLAttribute(Attribute *attr) const

{

    return attr->name() == hrefAttr;

}

bool HTMLAnchorElement::canStartSelection() const

{

    // FIXME: We probably want this same behavior in SVGAElement too

    if (!isLink())

        return HTMLElement::canStartSelection();

    return isContentEditable();

}

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);

}

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);

}

#if PLATFORM(SYMBIAN)

String HTMLAnchorElement::cti() const

{

    return getAttribute(ctiAttr);    

}

void HTMLAnchorElement::setCti(const String &value)

{    

    setAttribute(ctiAttr, value);

}

String HTMLAnchorElement::email() const

{    

    return getAttribute(emailAttr);

}