Split out CSSPrimitiveValue's PropertyID into CSSCustomIdentValue

third_party/WebKit/Source/core/css/CSSStringValues.h

Index: third_party/WebKit/Source/core/css/CSSStringValues.h
diff --git a/third_party/WebKit/Source/core/css/CSSStringValues.h b/third_party/WebKit/Source/core/css/CSSStringValues.h
new file mode 100644
index 0000000000000000000000000000000000000000..19001a82292e897af47476b6d937106eac3eded6
--- /dev/null
+++ b/third_party/WebKit/Source/core/css/CSSStringValues.h
@@ -0,0 +1,92 @@
+// Copyright 2015 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.
+
+#ifndef CSSStringValues_h
+#define CSSStringValues_h
+
+#include "core/CSSPropertyNames.h"
+#include "core/CoreExport.h"
+#include "core/css/CSSValue.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+
+class CSSStringValue : public CSSValue {
+public:
+    static PassRefPtrWillBeRawPtr<CSSStringValue> create(const String& str)
+    {
+        return adoptRefWillBeNoop(new CSSStringValue(str));
+    }
+
+    String value() const { return m_string; }
+    String customCSSText() const;
+
+    bool equals(const CSSStringValue& other) const { return m_string == other.m_string; }
+
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
+private:
+    CSSStringValue(const String&);
+
+    String m_string;
+};
+
+class CSSCustomIdentValue : public CSSValue {

[Timothy Loh, 2015/09/25 05:44:16]

one class per header file

+public:
+    static PassRefPtrWillBeRawPtr<CSSCustomIdentValue> create(const String& str)
+    {
+        return adoptRefWillBeNoop(new CSSCustomIdentValue(str));
+    }
+
+    static PassRefPtrWillBeRawPtr<CSSCustomIdentValue> create(CSSPropertyID propertyID)

[Timothy Loh, 2015/09/25 05:44:16]

I think this class would look better as:

{
public:
 static create(const String&) // no CSSPropertyID ctor!

 String value()
 bool isKnownPropertyID()
 CSSPropertyID valueAsPropertyID()

private:
 ensureParsedAsPropertyID();

 String m_string; // or atomicstring? might save a several KB on big web
properties
 mutable bool m_parsedAsPropertyID;
 mutable CSSPropertyID m_propertyId;
}

[sashab, 2015/09/28 03:37:03]

Changing all the callsites in the parser to pass the unparsed string instead of
the property ID directly will take a while. Also, some places need the property
ID constructor (e.g.
ComputedStyle->rareNonInheritedData->m_willChange->m_properties is stored as a
list of property IDs). I think this should come in a later patch.

[alancutter (OOO until 2018), 2015/09/30 02:08:50]

For now we can just use CSSPropertyInvalid to indicate that it's not a
CSSPropertyID and ASSERT(property != CSSPropertyInvalid) in the constructor.

+    {
+        return adoptRefWillBeNoop(new CSSCustomIdentValue(propertyID));
+    }
+
+    String string() const { ASSERT(!m_isPropertyID); return m_string; }
+    CSSPropertyID id() const { ASSERT(m_isPropertyID); return m_id; }
+    bool isValidPropertyID() const { return m_isPropertyID; }
+
+    String customCSSText() const;
+
+    bool equals(const CSSCustomIdentValue& other) const;
+
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
+private:
+    CSSCustomIdentValue(const String&);
+    CSSCustomIdentValue(CSSPropertyID);
+
+    bool m_isPropertyID;
+
+    // TODO(sashab): Store these in a union.

[Timothy Loh, 2015/09/25 05:44:16]

let's not do this

+    String m_string;
+    CSSPropertyID m_id;
+};
+
+class CSSURIValue : public CSSValue {
+public:
+    static PassRefPtrWillBeRawPtr<CSSURIValue> create(const String& str)
+    {
+        return adoptRefWillBeNoop(new CSSURIValue(str));
+    }
+
+    String value() const { return m_string; }
+    String customCSSText() const;
+
+    bool equals(const CSSURIValue& other) const { return m_string == other.m_string; }
+
+    DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValue::traceAfterDispatch(visitor); }
+private:
+    CSSURIValue(const String&);
+
+    String m_string;
+};
+
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSStringValue, isStringValue());
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSCustomIdentValue, isCustomIdentValue());
+DEFINE_CSS_VALUE_TYPE_CASTS(CSSURIValue, isURIValue());
+
+} // namespace blink
+
+#endif // CSSStringValues_h