layout/style/CSSValue.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* DOM object representing values in DOM computed style */
   8
   9 #ifndef mozilla_dom_CSSValue_h_
  10 #define mozilla_dom_CSSValue_h_
  11
  12 #include "nsWrapperCache.h"
  13 #include "nsStringFwd.h"
  14
  15 class nsIDOMCSSValue;
  16 class nsROCSSPrimitiveValue;
  17 namespace mozilla {
  18 class ErrorResult;
  19 }
  20
  21 namespace mozilla {
  22 namespace dom {
  23
  24 /**
  25  * CSSValue - a DOM object representing values in DOM computed style.
  26  */
  27 class CSSValue : public nsISupports,
  28                  public nsWrapperCache
  29 {
  30 public:
  31   // CSSValue
  32   virtual void GetCssText(nsString& aText, mozilla::ErrorResult& aRv) = 0;
  33   virtual void SetCssText(const nsAString& aText, mozilla::ErrorResult& aRv) = 0;
  34   virtual uint16_t CssValueType() const = 0;
  35
  36   // Downcasting
  37
  38   /**
  39    * Return this as a nsROCSSPrimitiveValue* if its a primitive value, and null
  40    * otherwise.
  41    */
  42   nsROCSSPrimitiveValue *AsPrimitiveValue();
  43 };
  44
  45 }
  46 }
  47
  48 #endif