Partial implementation of inline StylePropertyMap.

third_party/WebKit/Source/core/css/cssom/InlineStylePropertyMap.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/css/cssom/InlineStylePropertyMap.h"
+
+#include "core/CSSPropertyNames.h"
+#include "core/css/CSSPrimitiveValue.h"
+#include "core/css/CSSPropertyMetadata.h"
+#include "core/css/CSSValueList.h"
+#include "core/css/StylePropertySet.h"
+#include "core/css/cssom/CSSOMTypes.h"
+#include "core/css/cssom/SimpleLength.h"
+#include "core/css/cssom/StyleValueFactory.h"
+
+namespace blink {
+
+StyleValue* InlineStylePropertyMap::get(CSSPropertyID propertyID)
+{
+    StyleValueVector styleVector = getAll(propertyID);
+    if (styleVector.isEmpty())
+        return nullptr;
+
+    return styleVector.at(0);
+}
+
+StyleValueVector InlineStylePropertyMap::getAll(CSSPropertyID propertyID)
+{
+    CSSValue* cssValue = m_ownerElement->ensureMutableInlineStyle().getPropertyCSSValue(propertyID);
+    if (!cssValue)
+        return StyleValueVector();
+
+    StyleValueVector styleValueVector;
+
+    if (!cssValue->isValueList()) {
+        StyleValue* styleValue = StyleValueFactory::create(propertyID, *cssValue);
+        if (styleValue)
+            styleValueVector.append(styleValue);
+        return styleValueVector;
+    }
+
+    for (CSSValue* value : *toCSSValueList(cssValue)) {
+        StyleValue* styleValue = StyleValueFactory::create(propertyID, *value);
+        if (!styleValue) {
+            return StyleValueVector();
+        }
+        styleValueVector.append(styleValue);
+    }
+    return styleValueVector;
+}
+
+bool InlineStylePropertyMap::has(CSSPropertyID propertyID)
+{
+    return !getAll(propertyID).isEmpty();
+}
+
+Vector<String> InlineStylePropertyMap::getProperties()
+{
+    Vector<String> result;
+    StylePropertySet& inlineStyleSet = m_ownerElement->ensureMutableInlineStyle();
+    for (unsigned i = 0; i < inlineStyleSet.propertyCount(); i++) {
+        CSSPropertyID propertyID = inlineStyleSet.propertyAt(i).id();
+        result.append(getPropertyNameString(propertyID));
+    }
+    return result;
+}
+
+void InlineStylePropertyMap::set(CSSPropertyID propertyID, StyleValueOrStyleValueSequenceOrString& item, ExceptionState& exceptionState)
+{
+    if (item.isStyleValue()) {
+        StyleValue* styleValue = item.getAsStyleValue();
+        if (!CSSOMTypes::propertyCanTake(propertyID, *styleValue))  {
+            exceptionState.throwTypeError("Invalid type for property");
+            return;
+        }
+        m_ownerElement->setInlineStyleProperty(propertyID, styleValue->toCSSValue());
+    } else if (item.isStyleValueSequence()) {
+        if (!CSSPropertyMetadata::propertySupportsMultiple(propertyID)) {
+            exceptionState.throwTypeError("Property does not support multiple values");
+            return;
+        }
+
+        // TODO(meade): This won't always work. Figure out what kind of CSSValueList to create properly.
+        CSSValueList* valueList = CSSValueList::createSpaceSeparated();
+        StyleValueVector styleValueVector = item.getAsStyleValueSequence();
+        for (const Member<StyleValue> value : styleValueVector) {
+            if (!CSSOMTypes::propertyCanTake(propertyID, *value)) {
+                exceptionState.throwTypeError("Invalid type for property");
+                return;
+            }
+            valueList->append(value->toCSSValue());
+        }
+
+        m_ownerElement->setInlineStyleProperty(propertyID, valueList);
+    } else {
+        // Parse it.
+        ASSERT(item.isString());
+        // TODO(meade): Implement this.
+        exceptionState.throwTypeError("Not implemented yet");
+    }
+}
+
+void InlineStylePropertyMap::append(CSSPropertyID propertyID, StyleValueOrStyleValueSequenceOrString& item, ExceptionState& exceptionState)
+{
+    if (!CSSPropertyMetadata::propertySupportsMultiple(propertyID)) {
+        exceptionState.throwTypeError("Property does not support multiple values");
+        return;
+    }
+
+    CSSValue* cssValue = m_ownerElement->ensureMutableInlineStyle().getPropertyCSSValue(propertyID);
+    CSSValueList* cssValueList = nullptr;
+    if (cssValue->isValueList()) {
+        cssValueList = toCSSValueList(cssValue);
+    } else {
+        // TODO(meade): Figure out what the correct behaviour here is.
+        exceptionState.throwTypeError("Property is not already list valued");

[Timothy Loh, 2016/04/07 06:34:17]

return; ? otherwise you'll get a null pointer dereference very soon.

[meade_UTC10, 2016/04/07 07:15:36]

whoops, done.

+    }
+
+    if (item.isStyleValue()) {
+        StyleValue* styleValue = item.getAsStyleValue();
+        if (!CSSOMTypes::propertyCanTake(propertyID, *styleValue)) {
+            exceptionState.throwTypeError("Invalid type for property");
+            return;
+        }
+        cssValueList->append(item.getAsStyleValue()->toCSSValue());
+    } else if (item.isStyleValueSequence()) {
+        for (StyleValue* styleValue : item.getAsStyleValueSequence()) {
+            if (!CSSOMTypes::propertyCanTake(propertyID, *styleValue)) {
+                exceptionState.throwTypeError("Invalid type for property");
+                return;
+            }
+            cssValueList->append(styleValue->toCSSValue());
+        }
+    } else {
+        // Parse it.
+        ASSERT(item.isString());
+        // TODO(meade): Implement this.
+        exceptionState.throwTypeError("Not implemented yet");
+        return;
+    }
+
+    m_ownerElement->setInlineStyleProperty(propertyID, cssValueList);
+}
+
+void InlineStylePropertyMap::remove(CSSPropertyID propertyID, ExceptionState& exceptionState)
+{
+    m_ownerElement->removeInlineStyleProperty(propertyID);
+}
+
+} // namespace blink
+