[Typed OM] Implement FilteredComputedStylePropertyMap

third_party/WebKit/Source/core/css/cssom/FilteredComputedStylePropertyMap.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/FilteredComputedStylePropertyMap.h"
+
+#include "core/css/parser/CSSVariableParser.h"
+
+namespace blink {
+
+FilteredComputedStylePropertyMap::FilteredComputedStylePropertyMap(CSSComputedStyleDeclaration* computedStyleDeclaration, const Vector<CSSPropertyID>& nativeProperties, const Vector<AtomicString>& customProperties)
+    : ComputedStylePropertyMap(computedStyleDeclaration)
+{
+    for (const auto& nativeProperty : nativeProperties) {
+        m_nativeProperties.add(nativeProperty);

[ikilpatrick, 2016/06/09 02:28:47]

These two HashSets could also just be vectors. At some point we probably want to
look at on how many properties are in these. HashSet might be overkill.

+    }
+
+    for (const auto& customProperty: customProperties) {
+        m_customProperties.add(customProperty);
+    }
+}
+
+
+CSSStyleValue* FilteredComputedStylePropertyMap::get(const String& propertyName, ExceptionState& exceptionState)
+{

[ikilpatrick, 2016/06/09 02:28:47]

get, has, getAll are basically the same as StylePropertyMap apart from the
filter check. This seemed better than adding virtual checkProperty method. But
up to y'all.

This could also check then delegate but that seemed too expensive.

[shans, 2016/06/09 03:49:05]

This seems fine to me. The check is there so we don't always need to invalidate,
not to keep map size down or anything.

+    CSSPropertyID propertyID = cssPropertyID(propertyName);
+    if (propertyID != CSSPropertyInvalid && m_nativeProperties.contains(propertyID)) {
+        CSSStyleValueVector styleVector = getAllInternal(propertyID);
+        if (styleVector.isEmpty())
+            return nullptr;
+
+        return styleVector[0];
+    }
+
+    if (propertyID == CSSPropertyInvalid && CSSVariableParser::isValidVariableName(propertyName) && m_customProperties.contains(AtomicString(propertyName))) {
+        CSSStyleValueVector styleVector = getAllInternal(AtomicString(propertyName));
+        if (styleVector.isEmpty())
+            return nullptr;
+
+        return styleVector[0];
+    }
+
+    exceptionState.throwTypeError("Invalid propertyName: " + propertyName);
+    return nullptr;
+}
+
+CSSStyleValueVector FilteredComputedStylePropertyMap::getAll(const String& propertyName, ExceptionState& exceptionState)
+{
+    CSSPropertyID propertyID = cssPropertyID(propertyName);
+    if (propertyID != CSSPropertyInvalid && m_nativeProperties.contains(propertyID))
+        return getAllInternal(propertyID);
+
+    if (propertyID == CSSPropertyInvalid && CSSVariableParser::isValidVariableName(propertyName) && m_customProperties.contains(AtomicString(propertyName)))
+        return getAllInternal(AtomicString(propertyName));
+
+    exceptionState.throwTypeError("Invalid propertyName: " + propertyName);
+    return CSSStyleValueVector();
+}
+
+bool FilteredComputedStylePropertyMap::has(const String& propertyName, ExceptionState& exceptionState)
+{
+    CSSPropertyID propertyID = cssPropertyID(propertyName);
+    if (propertyID != CSSPropertyInvalid && m_nativeProperties.contains(propertyID))
+        return !getAllInternal(propertyID).isEmpty();
+
+    if (propertyID == CSSPropertyInvalid && CSSVariableParser::isValidVariableName(propertyName) && m_customProperties.contains(AtomicString(propertyName)))
+        return !getAllInternal(AtomicString(propertyName)).isEmpty();
+
+    exceptionState.throwTypeError("Invalid propertyName: " + propertyName);
+    return false;
+}
+
+Vector<String> FilteredComputedStylePropertyMap::getProperties()
+{
+    Vector<String> result;
+    for (const auto& nativeProperty : m_nativeProperties) {
+        result.append(getPropertyNameString(nativeProperty));
+    }
+
+    for (const auto& customProperty : m_customProperties) {
+        result.append(customProperty);
+    }
+
+    return result;
+}
+
+} // namespace blink