Remove meta viewport and @viewport CSS rules.

sky/engine/core/css/resolver/ViewportStyleResolver.cpp

-/*
- * Copyright (C) 2012-2013 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer in the documentation and/or other materials
- *    provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
- * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "core/css/resolver/ViewportStyleResolver.h"
-
-#include "core/CSSValueKeywords.h"
-#include "core/css/CSSPrimitiveValueMappings.h"
-#include "core/css/CSSToLengthConversionData.h"
-#include "core/css/StylePropertySet.h"
-#include "core/css/StyleRule.h"
-#include "core/dom/Document.h"
-#include "core/dom/NodeRenderStyle.h"
-#include "core/dom/ViewportDescription.h"
-#include "core/frame/FrameView.h"
-
-namespace blink {
-
-DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(ViewportStyleResolver);
-
-ViewportStyleResolver::ViewportStyleResolver(Document* document)
-    : m_document(document)
-    , m_hasAuthorStyle(false)
-{
-    ASSERT(m_document);
-}
-
-void ViewportStyleResolver::collectViewportRules(RuleSet* rules, Origin origin)
-{
-    rules->compactRulesIfNeeded();
-
-    const WillBeHeapVector<RawPtrWillBeMember<StyleRuleViewport> >& viewportRules = rules->viewportRules();
-    for (size_t i = 0; i < viewportRules.size(); ++i)
-        addViewportRule(viewportRules[i], origin);
-}
-
-void ViewportStyleResolver::addViewportRule(StyleRuleViewport* viewportRule, Origin origin)
-{
-    StylePropertySet& propertySet = viewportRule->mutableProperties();
-
-    unsigned propertyCount = propertySet.propertyCount();
-    if (!propertyCount)
-        return;
-
-    if (origin == AuthorOrigin)
-        m_hasAuthorStyle = true;
-
-    if (!m_propertySet) {
-        m_propertySet = propertySet.mutableCopy();
-        return;
-    }
-
-    // We cannot use mergeAndOverrideOnConflict() here because it doesn't
-    // respect the !important declaration (but addParsedProperty() does).
-    for (unsigned i = 0; i < propertyCount; ++i)
-        m_propertySet->addParsedProperty(propertySet.propertyAt(i).toCSSProperty());
-}
-
-void ViewportStyleResolver::resolve()
-{
-    if (!m_document)
-        return;
-
-    if (!m_propertySet) {
-        m_document->setViewportDescription(ViewportDescription(ViewportDescription::UserAgentStyleSheet));
-        return;
-    }
-
-    ViewportDescription description(m_hasAuthorStyle ? ViewportDescription::AuthorStyleSheet : ViewportDescription::UserAgentStyleSheet);
-
-    description.userZoom = viewportArgumentValue(CSSPropertyUserZoom);
-    description.zoom = viewportArgumentValue(CSSPropertyZoom);
-    description.minZoom = viewportArgumentValue(CSSPropertyMinZoom);
-    description.maxZoom = viewportArgumentValue(CSSPropertyMaxZoom);
-    description.minWidth = viewportLengthValue(CSSPropertyMinWidth);
-    description.maxWidth = viewportLengthValue(CSSPropertyMaxWidth);
-    description.minHeight = viewportLengthValue(CSSPropertyMinHeight);
-    description.maxHeight = viewportLengthValue(CSSPropertyMaxHeight);
-    description.orientation = viewportArgumentValue(CSSPropertyOrientation);
-
-    m_document->setViewportDescription(description);
-
-    m_propertySet = nullptr;
-    m_hasAuthorStyle = false;
-}
-
-float ViewportStyleResolver::viewportArgumentValue(CSSPropertyID id) const
-{
-    float defaultValue = ViewportDescription::ValueAuto;
-
-    // UserZoom default value is CSSValueZoom, which maps to true, meaning that
-    // yes, it is user scalable. When the value is set to CSSValueFixed, we
-    // return false.
-    if (id == CSSPropertyUserZoom)
-        defaultValue = 1;
-
-    RefPtrWillBeRawPtr<CSSValue> value = m_propertySet->getPropertyCSSValue(id);
-    if (!value || !value->isPrimitiveValue())
-        return defaultValue;
-
-    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value.get());
-
-    if (primitiveValue->isNumber() || primitiveValue->isPx())
-        return primitiveValue->getFloatValue();
-
-    if (primitiveValue->isFontRelativeLength())
-        return primitiveValue->getFloatValue() * m_document->renderStyle()->fontDescription().computedSize();
-
-    if (primitiveValue->isPercentage()) {
-        float percentValue = primitiveValue->getFloatValue() / 100.0f;
-        switch (id) {
-        case CSSPropertyMaxZoom:
-        case CSSPropertyMinZoom:
-        case CSSPropertyZoom:
-            return percentValue;
-        default:
-            ASSERT_NOT_REACHED();
-            break;
-        }
-    }
-
-    switch (primitiveValue->getValueID()) {
-    case CSSValueAuto:
-        return defaultValue;
-    case CSSValueLandscape:
-        return ViewportDescription::ValueLandscape;
-    case CSSValuePortrait:
-        return ViewportDescription::ValuePortrait;
-    case CSSValueZoom:
-        return defaultValue;
-    case CSSValueInternalExtendToZoom:
-        return ViewportDescription::ValueExtendToZoom;
-    case CSSValueFixed:
-        return 0;
-    default:
-        return defaultValue;
-    }
-}
-
-Length ViewportStyleResolver::viewportLengthValue(CSSPropertyID id) const
-{
-    ASSERT(id == CSSPropertyMaxHeight
-        || id == CSSPropertyMinHeight
-        || id == CSSPropertyMaxWidth
-        || id == CSSPropertyMinWidth);
-
-    RefPtrWillBeRawPtr<CSSValue> value = m_propertySet->getPropertyCSSValue(id);
-    if (!value || !value->isPrimitiveValue())
-        return Length(); // auto
-
-    CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value.get());
-
-    if (primitiveValue->getValueID() == CSSValueInternalExtendToZoom)
-        return Length(ExtendToZoom);
-
-    RenderStyle* documentStyle = m_document->renderStyle();
-
-    // If we have viewport units the conversion will mark the document style as having viewport units.
-    bool documentStyleHasViewportUnits = documentStyle->hasViewportUnits();
-    documentStyle->setHasViewportUnits(false);
-
-    FrameView* view = m_document->view();
-    float width = view ? view->width() : 0;
-    float height = view ? view->height() : 0;
-
-    Length result = primitiveValue->convertToLength<AnyConversion>(CSSToLengthConversionData(documentStyle, documentStyle, width, height, 1.0f));
-    if (documentStyle->hasViewportUnits())
-        m_document->setHasViewportUnits();
-    documentStyle->setHasViewportUnits(documentStyleHasViewportUnits);
-
-    return result;
-}
-
-void ViewportStyleResolver::trace(Visitor* visitor)
-{
-    visitor->trace(m_propertySet);
-    visitor->trace(m_document);
-}
-
-} // namespace blink