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      1 /**
      2  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      3  *
      4  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      5  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      6  *           (C) 2000 Simon Hausmann <hausmann (at) kde.org>
      7  * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved.
      8  *           (C) 2006 Graham Dennis (graham.dennis (at) gmail.com)
      9  *
     10  * This library is free software; you can redistribute it and/or
     11  * modify it under the terms of the GNU Library General Public
     12  * License as published by the Free Software Foundation; either
     13  * version 2 of the License, or (at your option) any later version.
     14  *
     15  * This library is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     18  * Library General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU Library General Public License
     21  * along with this library; see the file COPYING.LIB.  If not, write to
     22  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     23  * Boston, MA 02110-1301, USA.
     24  *
     25  */
     26 
     27 #include "config.h"
     28 
     29 #if ENABLE(WML)
     30 #include "WMLAElement.h"
     31 
     32 #include "DNS.h"
     33 #include "Event.h"
     34 #include "EventHandler.h"
     35 #include "EventNames.h"
     36 #include "Frame.h"
     37 #include "FrameLoader.h"
     38 #include "HTMLNames.h"
     39 #include "KeyboardEvent.h"
     40 #include "MappedAttribute.h"
     41 #include "MouseEvent.h"
     42 #include "RenderBox.h"
     43 #include "WMLNames.h"
     44 
     45 namespace WebCore {
     46 
     47 using namespace WMLNames;
     48 
     49 WMLAElement::WMLAElement(const QualifiedName& tagName, Document* doc)
     50     : WMLElement(tagName, doc)
     51 {
     52 }
     53 
     54 void WMLAElement::parseMappedAttribute(MappedAttribute* attr)
     55 {
     56     if (attr->name() == HTMLNames::hrefAttr) {
     57         bool wasLink = isLink();
     58         setIsLink(!attr->isNull());
     59         if (wasLink != isLink())
     60             setNeedsStyleRecalc();
     61         if (isLink() && document()->isDNSPrefetchEnabled()) {
     62             String value = attr->value();
     63             if (protocolIs(value, "http") || protocolIs(value, "https") || value.startsWith("//"))
     64                 prefetchDNS(document()->completeURL(value).host());
     65         }
     66     } else if (attr->name() == HTMLNames::nameAttr
     67                || attr->name() == HTMLNames::titleAttr
     68                || attr->name() == HTMLNames::relAttr) {
     69         // Do nothing.
     70     } else
     71         WMLElement::parseMappedAttribute(attr);
     72 }
     73 
     74 bool WMLAElement::supportsFocus() const
     75 {
     76     return isLink() || WMLElement::supportsFocus();
     77 }
     78 
     79 bool WMLAElement::isMouseFocusable() const
     80 {
     81     return false;
     82 }
     83 
     84 bool WMLAElement::isKeyboardFocusable(KeyboardEvent* event) const
     85 {
     86     if (!isFocusable())
     87         return false;
     88 
     89     if (!document()->frame())
     90         return false;
     91 
     92     if (!document()->frame()->eventHandler()->tabsToLinks(event))
     93         return false;
     94 
     95     if (!renderer() || !renderer()->isBoxModelObject())
     96         return false;
     97 
     98     // Before calling absoluteRects, check for the common case where the renderer
     99     // is non-empty, since this is a faster check and almost always returns true.
    100     RenderBoxModelObject* box = toRenderBoxModelObject(renderer());
    101     if (!box->borderBoundingBox().isEmpty())
    102         return true;
    103 
    104     Vector<IntRect> rects;
    105     FloatPoint absPos = renderer()->localToAbsolute();
    106     renderer()->absoluteRects(rects, absPos.x(), absPos.y());
    107     size_t n = rects.size();
    108     for (size_t i = 0; i < n; ++i)
    109         if (!rects[i].isEmpty())
    110             return true;
    111 
    112     return false;
    113 }
    114 
    115 void WMLAElement::defaultEventHandler(Event* event)
    116 {
    117     if (isLink() && (event->type() == eventNames().clickEvent || (event->type() == eventNames().keydownEvent && focused()))) {
    118         MouseEvent* e = 0;
    119         if (event->type() == eventNames().clickEvent && event->isMouseEvent())
    120             e = static_cast<MouseEvent*>(event);
    121 
    122         KeyboardEvent* k = 0;
    123         if (event->type() == eventNames().keydownEvent && event->isKeyboardEvent())
    124             k = static_cast<KeyboardEvent*>(event);
    125 
    126         if (e && e->button() == RightButton) {
    127             WMLElement::defaultEventHandler(event);
    128             return;
    129         }
    130 
    131         if (k) {
    132             if (k->keyIdentifier() != "Enter") {
    133                 WMLElement::defaultEventHandler(event);
    134                 return;
    135             }
    136 
    137             event->setDefaultHandled();
    138             dispatchSimulatedClick(event);
    139             return;
    140         }
    141 
    142         if (!event->defaultPrevented() && document()->frame()) {
    143             String url = document()->completeURL(deprecatedParseURL(getAttribute(HTMLNames::hrefAttr)));
    144             document()->frame()->loader()->urlSelected(url, target(), event, false, false, true, SendReferrer);
    145         }
    146 
    147         event->setDefaultHandled();
    148     }
    149 
    150     WMLElement::defaultEventHandler(event);
    151 }
    152 
    153 void WMLAElement::accessKeyAction(bool sendToAnyElement)
    154 {
    155     // send the mouse button events if the caller specified sendToAnyElement
    156     dispatchSimulatedClick(0, sendToAnyElement);
    157 }
    158 
    159 bool WMLAElement::isURLAttribute(Attribute *attr) const
    160 {
    161     return attr->name() == HTMLNames::hrefAttr;
    162 }
    163 
    164 String WMLAElement::target() const
    165 {
    166     return getAttribute(HTMLNames::targetAttr);
    167 }
    168 
    169 }
    170 
    171 #endif
    172