The Tor Browser: layout/style/nsROCSSPrimitiveValue.h@8bccb770b82d

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /* DOM object representing values in DOM computed style */

     8 #ifndef nsROCSSPrimitiveValue_h___

     9 #define nsROCSSPrimitiveValue_h___

    11 #include "nsIDOMCSSValue.h"

    12 #include "nsIDOMCSSPrimitiveValue.h"

    13 #include "nsCSSKeywords.h"

    14 #include "CSSValue.h"

    15 #include "nsCOMPtr.h"

    16 #include "nsCoord.h"

    18 class nsIURI;

    19 class nsDOMCSSRect;

    20 class nsDOMCSSRGBColor;

    22 // There is no CSS_TURN constant on the CSSPrimitiveValue interface,

    23 // since that unit is newer than DOM Level 2 Style, and CSS OM will

    24 // probably expose CSS values in some other way in the future.  We

    25 // use this value in mType for "turn"-unit angles, but we define it

    26 // here to avoid exposing it to content.

    27 #define CSS_TURN 30U

    28 // Likewise we have some internal aliases for CSS_NUMBER that we don't

    29 // want to expose.

    30 #define CSS_NUMBER_INT32 31U

    31 #define CSS_NUMBER_UINT32 32U

    33 /**

    34  * Read-only CSS primitive value - a DOM object representing values in DOM

    35  * computed style.

    36  */

    37 class nsROCSSPrimitiveValue MOZ_FINAL : public mozilla::dom::CSSValue,

    38   public nsIDOMCSSPrimitiveValue

    39 {

    40 public:

    41   NS_DECL_CYCLE_COLLECTING_ISUPPORTS

    42   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsROCSSPrimitiveValue, mozilla::dom::CSSValue)

    44   // nsIDOMCSSPrimitiveValue

    45   NS_DECL_NSIDOMCSSPRIMITIVEVALUE

    47   // nsIDOMCSSValue

    48   NS_DECL_NSIDOMCSSVALUE

    50   // CSSValue

    51   virtual void GetCssText(nsString& aText, mozilla::ErrorResult& aRv) MOZ_OVERRIDE MOZ_FINAL;

    52   virtual void SetCssText(const nsAString& aText, mozilla::ErrorResult& aRv) MOZ_OVERRIDE MOZ_FINAL;

    53   virtual uint16_t CssValueType() const MOZ_OVERRIDE MOZ_FINAL;

    55   // CSSPrimitiveValue

    56   uint16_t PrimitiveType()

    57   {

    58     // New value types were introduced but not added to CSS OM.

    59     // Return CSS_UNKNOWN to avoid exposing CSS_TURN to content.

    60     if (mType > CSS_RGBCOLOR) {

    61       if (mType == CSS_NUMBER_INT32 || mType == CSS_NUMBER_UINT32) {

    62         return CSS_NUMBER;

    63       }

    64       return CSS_UNKNOWN;

    65     }

    66     return mType;

    67   }

    68   void SetFloatValue(uint16_t aUnitType, float aValue,

    69                      mozilla::ErrorResult& aRv);

    70   float GetFloatValue(uint16_t aUnitType, mozilla::ErrorResult& aRv);

    71   void GetStringValue(nsString& aString, mozilla::ErrorResult& aRv);

    72   void SetStringValue(uint16_t aUnitType, const nsAString& aString,

    73                       mozilla::ErrorResult& aRv);

    74   already_AddRefed<nsIDOMCounter> GetCounterValue(mozilla::ErrorResult& aRv);

    75   nsDOMCSSRect* GetRectValue(mozilla::ErrorResult& aRv);

    76   nsDOMCSSRGBColor *GetRGBColorValue(mozilla::ErrorResult& aRv);

    78   // nsROCSSPrimitiveValue

    79   nsROCSSPrimitiveValue();

    80   ~nsROCSSPrimitiveValue();

    82   void SetNumber(float aValue);

    83   void SetNumber(int32_t aValue);

    84   void SetNumber(uint32_t aValue);

    85   void SetPercent(float aValue);

    86   void SetDegree(float aValue);

    87   void SetGrad(float aValue);

    88   void SetRadian(float aValue);

    89   void SetTurn(float aValue);

    90   void SetAppUnits(nscoord aValue);

    91   void SetAppUnits(float aValue);

    92   void SetIdent(nsCSSKeyword aKeyword);

    93   // FIXME: CSS_STRING should imply a string with "" and a need for escaping.

    94   void SetString(const nsACString& aString, uint16_t aType = CSS_STRING);

    95   // FIXME: CSS_STRING should imply a string with "" and a need for escaping.

    96   void SetString(const nsAString& aString, uint16_t aType = CSS_STRING);

    97   void SetURI(nsIURI *aURI);

    98   void SetColor(nsDOMCSSRGBColor* aColor);

    99   void SetRect(nsDOMCSSRect* aRect);

   100   void SetTime(float aValue);

   101   void Reset();

   103   nsISupports* GetParentObject() const

   104   {

   105     return nullptr;

   106   }

   108   virtual JSObject *WrapObject(JSContext *cx) MOZ_OVERRIDE;

   110 private:

   111   uint16_t mType;

   113   union {

   114     nscoord         mAppUnits;

   115     float           mFloat;

   116     int32_t         mInt32;

   117     uint32_t        mUint32;

   118     nsDOMCSSRGBColor* mColor;

   119     nsDOMCSSRect*     mRect;

   120     char16_t*      mString;

   121     nsIURI*         mURI;

   122     nsCSSKeyword    mKeyword;

   123   } mValue;

   124 };

   126 inline nsROCSSPrimitiveValue *mozilla::dom::CSSValue::AsPrimitiveValue()

   127 {

   128   return CssValueType() == nsIDOMCSSValue::CSS_PRIMITIVE_VALUE ?

   129     static_cast<nsROCSSPrimitiveValue*>(this) : nullptr;

   130 }

   132 #endif /* nsROCSSPrimitiveValue_h___ */

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