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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 
     33 #include "core/html/shadow/MeterShadowElement.h"
     34 
     35 #include "core/CSSPropertyNames.h"
     36 #include "core/HTMLNames.h"
     37 #include "core/html/HTMLMeterElement.h"
     38 #include "core/rendering/RenderMeter.h"
     39 #include "core/rendering/RenderTheme.h"
     40 
     41 namespace blink {
     42 
     43 using namespace HTMLNames;
     44 
     45 inline MeterShadowElement::MeterShadowElement(Document& document)
     46     : HTMLDivElement(document)
     47 {
     48 }
     49 
     50 HTMLMeterElement* MeterShadowElement::meterElement() const
     51 {
     52     return toHTMLMeterElement(shadowHost());
     53 }
     54 
     55 bool MeterShadowElement::rendererIsNeeded(const RenderStyle& style)
     56 {
     57     RenderObject* renderer = meterElement()->renderer();
     58     return renderer && !RenderTheme::theme().supportsMeter(renderer->style()->appearance()) && HTMLDivElement::rendererIsNeeded(style);
     59 }
     60 
     61 inline MeterInnerElement::MeterInnerElement(Document& document)
     62     : MeterShadowElement(document)
     63 {
     64 }
     65 
     66 PassRefPtrWillBeRawPtr<MeterInnerElement> MeterInnerElement::create(Document& document)
     67 {
     68     RefPtrWillBeRawPtr<MeterInnerElement> element = adoptRefWillBeNoop(new MeterInnerElement(document));
     69     element->setShadowPseudoId(AtomicString("-webkit-meter-inner-element", AtomicString::ConstructFromLiteral));
     70     return element.release();
     71 }
     72 
     73 bool MeterInnerElement::rendererIsNeeded(const RenderStyle& style)
     74 {
     75     if (meterElement()->hasAuthorShadowRoot())
     76         return HTMLDivElement::rendererIsNeeded(style);
     77 
     78     RenderObject* renderer = meterElement()->renderer();
     79     return renderer && !RenderTheme::theme().supportsMeter(renderer->style()->appearance()) && HTMLDivElement::rendererIsNeeded(style);
     80 }
     81 
     82 RenderObject* MeterInnerElement::createRenderer(RenderStyle*)
     83 {
     84     return new RenderMeter(this);
     85 }
     86 
     87 inline MeterBarElement::MeterBarElement(Document& document)
     88     : MeterShadowElement(document)
     89 {
     90 }
     91 
     92 PassRefPtrWillBeRawPtr<MeterBarElement> MeterBarElement::create(Document& document)
     93 {
     94     RefPtrWillBeRawPtr<MeterBarElement> element = adoptRefWillBeNoop(new MeterBarElement(document));
     95     element->setShadowPseudoId(AtomicString("-webkit-meter-bar", AtomicString::ConstructFromLiteral));
     96     return element.release();
     97 }
     98 
     99 inline MeterValueElement::MeterValueElement(Document& document)
    100     : MeterShadowElement(document)
    101 {
    102 }
    103 
    104 PassRefPtrWillBeRawPtr<MeterValueElement> MeterValueElement::create(Document& document)
    105 {
    106     RefPtrWillBeRawPtr<MeterValueElement> element = adoptRefWillBeNoop(new MeterValueElement(document));
    107     element->updatePseudo();
    108     return element.release();
    109 }
    110 
    111 const AtomicString& MeterValueElement::valuePseudoId() const
    112 {
    113     DEFINE_STATIC_LOCAL(AtomicString, optimumPseudoId, ("-webkit-meter-optimum-value", AtomicString::ConstructFromLiteral));
    114     DEFINE_STATIC_LOCAL(AtomicString, suboptimumPseudoId, ("-webkit-meter-suboptimum-value", AtomicString::ConstructFromLiteral));
    115     DEFINE_STATIC_LOCAL(AtomicString, evenLessGoodPseudoId, ("-webkit-meter-even-less-good-value", AtomicString::ConstructFromLiteral));
    116 
    117     HTMLMeterElement* meter = meterElement();
    118     if (!meter)
    119         return optimumPseudoId;
    120 
    121     switch (meter->gaugeRegion()) {
    122     case HTMLMeterElement::GaugeRegionOptimum:
    123         return optimumPseudoId;
    124     case HTMLMeterElement::GaugeRegionSuboptimal:
    125         return suboptimumPseudoId;
    126     case HTMLMeterElement::GaugeRegionEvenLessGood:
    127         return evenLessGoodPseudoId;
    128     default:
    129         ASSERT_NOT_REACHED();
    130         return optimumPseudoId;
    131     }
    132 }
    133 
    134 void MeterValueElement::setWidthPercentage(double width)
    135 {
    136     setInlineStyleProperty(CSSPropertyWidth, width, CSSPrimitiveValue::CSS_PERCENTAGE);
    137 }
    138 
    139 }
    140