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      1 /*
      2  * Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 #include "core/html/HTMLDetailsElement.h"
     23 
     24 #include "bindings/v8/ExceptionStatePlaceholder.h"
     25 #include "core/CSSPropertyNames.h"
     26 #include "core/CSSValueKeywords.h"
     27 #include "core/HTMLNames.h"
     28 #include "core/dom/Text.h"
     29 #include "core/dom/shadow/ShadowRoot.h"
     30 #include "core/events/EventSender.h"
     31 #include "core/html/HTMLContentElement.h"
     32 #include "core/html/HTMLDivElement.h"
     33 #include "core/html/HTMLSummaryElement.h"
     34 #include "core/html/shadow/ShadowElementNames.h"
     35 #include "core/rendering/RenderBlockFlow.h"
     36 #include "platform/text/PlatformLocale.h"
     37 
     38 namespace WebCore {
     39 
     40 using namespace HTMLNames;
     41 
     42 static DetailsEventSender& detailsToggleEventSender()
     43 {
     44     DEFINE_STATIC_LOCAL(DetailsEventSender, sharedToggleEventSender, (EventTypeNames::toggle));
     45     return sharedToggleEventSender;
     46 }
     47 
     48 PassRefPtrWillBeRawPtr<HTMLDetailsElement> HTMLDetailsElement::create(Document& document)
     49 {
     50     RefPtrWillBeRawPtr<HTMLDetailsElement> details = adoptRefWillBeNoop(new HTMLDetailsElement(document));
     51     details->ensureUserAgentShadowRoot();
     52     return details.release();
     53 }
     54 
     55 HTMLDetailsElement::HTMLDetailsElement(Document& document)
     56     : HTMLElement(detailsTag, document)
     57     , m_isOpen(false)
     58 {
     59     ScriptWrappable::init(this);
     60 }
     61 
     62 HTMLDetailsElement::~HTMLDetailsElement()
     63 {
     64     detailsToggleEventSender().cancelEvent(this);
     65 }
     66 
     67 void HTMLDetailsElement::dispatchPendingEvent(DetailsEventSender* eventSender)
     68 {
     69     ASSERT_UNUSED(eventSender, eventSender == &detailsToggleEventSender());
     70     dispatchEvent(Event::create(EventTypeNames::toggle));
     71 }
     72 
     73 
     74 RenderObject* HTMLDetailsElement::createRenderer(RenderStyle*)
     75 {
     76     return new RenderBlockFlow(this);
     77 }
     78 
     79 void HTMLDetailsElement::didAddUserAgentShadowRoot(ShadowRoot& root)
     80 {
     81     DEFINE_STATIC_LOCAL(const AtomicString, summarySelector, ("summary:first-of-type", AtomicString::ConstructFromLiteral));
     82 
     83     RefPtrWillBeRawPtr<HTMLSummaryElement> defaultSummary = HTMLSummaryElement::create(document());
     84     defaultSummary->appendChild(Text::create(document(), locale().queryString(blink::WebLocalizedString::DetailsLabel)));
     85 
     86     RefPtrWillBeRawPtr<HTMLContentElement> summary = HTMLContentElement::create(document());
     87     summary->setIdAttribute(ShadowElementNames::detailsSummary());
     88     summary->setAttribute(selectAttr, summarySelector);
     89     summary->appendChild(defaultSummary);
     90     root.appendChild(summary.release());
     91 
     92     RefPtrWillBeRawPtr<HTMLDivElement> content = HTMLDivElement::create(document());
     93     content->setIdAttribute(ShadowElementNames::detailsContent());
     94     content->appendChild(HTMLContentElement::create(document()));
     95     content->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
     96     root.appendChild(content.release());
     97 }
     98 
     99 Element* HTMLDetailsElement::findMainSummary() const
    100 {
    101     if (HTMLSummaryElement* summary = Traversal<HTMLSummaryElement>::firstChild(*this))
    102         return summary;
    103 
    104     HTMLContentElement* content = toHTMLContentElement(userAgentShadowRoot()->firstChild());
    105     ASSERT(content->firstChild() && isHTMLSummaryElement(*content->firstChild()));
    106     return toElement(content->firstChild());
    107 }
    108 
    109 void HTMLDetailsElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
    110 {
    111     if (name == openAttr) {
    112         bool oldValue = m_isOpen;
    113         m_isOpen = !value.isNull();
    114         if (m_isOpen == oldValue)
    115             return;
    116 
    117         // Dispatch toggle event asynchronously.
    118         detailsToggleEventSender().cancelEvent(this);
    119         detailsToggleEventSender().dispatchEventSoon(this);
    120 
    121         Element* content = ensureUserAgentShadowRoot().getElementById(ShadowElementNames::detailsContent());
    122         ASSERT(content);
    123         if (m_isOpen)
    124             content->removeInlineStyleProperty(CSSPropertyDisplay);
    125         else
    126             content->setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
    127         Element* summary = ensureUserAgentShadowRoot().getElementById(ShadowElementNames::detailsSummary());
    128         ASSERT(summary);
    129         // FIXME: DetailsMarkerControl's RenderDetailsMarker has no concept of being updated
    130         // without recreating it causing a repaint. Instead we should change it so we can tell
    131         // it to toggle the open/closed triangle state and avoid reattaching the entire summary.
    132         summary->lazyReattachIfAttached();
    133         return;
    134     }
    135     HTMLElement::parseAttribute(name, value);
    136 }
    137 
    138 void HTMLDetailsElement::toggleOpen()
    139 {
    140     setAttribute(openAttr, m_isOpen ? nullAtom : emptyAtom);
    141 }
    142 
    143 bool HTMLDetailsElement::isInteractiveContent() const
    144 {
    145     return true;
    146 }
    147 
    148 }
    149