[SVGDom/experimental] Initial SVGLength support

experimental/svg/model/SkSVGAttributeParser.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkSVGAttributeParser_DEFINED
+#define SkSVGAttributeParser_DEFINED
+
+#include "SkSVGTypes.h"
+
+class SkSVGAttributeParser : public SkNoncopyable {
+public:
+    SkSVGAttributeParser(const char[]);
+
+    bool parseColor(SkSVGColor*);
+    bool parseNumber(SkSVGNumber*);
+    bool parseLength(SkSVGLength*);
+
+private:
+    // Stack-only
+    void* operator new(size_t) = delete;
+    void* operator new(size_t, void*) = delete;
+
+    template <typename F>
+    bool advanceWhile(F func);
+
+    bool parseWSAtom();
+    bool parseEOSAtom();
+    bool parseSepAtom();
+    bool parseStringAtom(const char*);
+    bool parseScalarAtom(SkScalar*);
+    bool parseHexAtom(uint32_t*);
+    bool parseLengthUnitAtom(SkSVGLength::Unit*);
+    bool parseNamedColorAtom(SkColor*);
+    bool parseHexColorAtom(SkColor*);
+

[robertphillips, 2016/08/02 22:25:56]

fCurPos ?

// The current position in the input string 

?

[f(malita), 2016/08/03 16:50:51]

Done.

+    const char* fChr;
+

[robertphillips, 2016/08/02 22:25:56]

everyone else uses a typedef here

[f(malita), 2016/08/03 16:50:51]

I thought 'using' is preferred since c++11, but not sure whether the style guide
is updated.  Done.

+    using INHERITED = SkNoncopyable;
+};
+
+#endif // SkSVGAttributeParser_DEFINED