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comparison: layout/style/CSSVariableValues.h
layout/style/CSSVariableValues.h
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- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:5c1df0b141fb |
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| 1 /* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */ | |
| 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/. */ | |
| 5 | |
| 6 /* computed CSS Variable values */ | |
| 7 | |
| 8 #ifndef mozilla_CSSVariableValues_h | |
| 9 #define mozilla_CSSVariableValues_h | |
| 10 | |
| 11 #include "nsCSSScanner.h" | |
| 12 #include "nsDataHashtable.h" | |
| 13 #include "nsTArray.h" | |
| 14 | |
| 15 namespace mozilla { | |
| 16 | |
| 17 class CSSVariableResolver; | |
| 18 | |
| 19 class CSSVariableValues | |
| 20 { | |
| 21 public: | |
| 22 CSSVariableValues(); | |
| 23 CSSVariableValues(const CSSVariableValues& aOther); | |
| 24 #ifdef DEBUG | |
| 25 ~CSSVariableValues(); | |
| 26 #endif | |
| 27 CSSVariableValues& operator=(const CSSVariableValues& aOther); | |
| 28 | |
| 29 bool operator==(const CSSVariableValues& aOther) const; | |
| 30 bool operator!=(const CSSVariableValues& aOther) const | |
| 31 { return !(*this == aOther); } | |
| 32 | |
| 33 /** | |
| 34 * Gets the value of a variable in this set of computed variables. | |
| 35 * | |
| 36 * @param aName The variable name (not including any "--" prefix that would | |
| 37 * be part of the custom property name). | |
| 38 * @param aValue Out parameter into which the value of the variable will | |
| 39 * be stored. | |
| 40 * @return Whether a variable with the given name was found. When false | |
| 41 * is returned, aValue will not be modified. | |
| 42 */ | |
| 43 bool Get(const nsAString& aName, nsString& aValue) const; | |
| 44 | |
| 45 /** | |
| 46 * Gets the value of a variable in this set of computed variables, along | |
| 47 * with information on the types of tokens that appear at the start and | |
| 48 * end of the token stream. | |
| 49 * | |
| 50 * @param aName The variable name (not including any "--" prefix that would | |
| 51 * be part of the custom property name). | |
| 52 * @param aValue Out parameter into which the value of the variable will | |
| 53 * be stored. | |
| 54 * @param aFirstToken The type of token at the start of the variable value. | |
| 55 * @param aLastToken The type of token at the en of the variable value. | |
| 56 * @return Whether a variable with the given name was found. When false | |
| 57 * is returned, aValue, aFirstToken and aLastToken will not be modified. | |
| 58 */ | |
| 59 bool Get(const nsAString& aName, | |
| 60 nsString& aValue, | |
| 61 nsCSSTokenSerializationType& aFirstToken, | |
| 62 nsCSSTokenSerializationType& aLastToken) const; | |
| 63 | |
| 64 /** | |
| 65 * Gets the name of the variable at the given index. | |
| 66 * | |
| 67 * Variables on this object are ordered, and that order is just determined | |
| 68 * based on the order that they are added to the object. A consistent | |
| 69 * ordering is required for CSSDeclaration objects in the DOM. | |
| 70 * CSSDeclarations expose property names as indexed properties, which need to | |
| 71 * be stable. | |
| 72 * | |
| 73 * @param aIndex The index of the variable to get. | |
| 74 * @param aName Out parameter into which the name of the variable will be | |
| 75 * stored. | |
| 76 */ | |
| 77 void GetVariableAt(size_t aIndex, nsAString& aName) const; | |
| 78 | |
| 79 /** | |
| 80 * Gets the number of variables stored on this object. | |
| 81 */ | |
| 82 size_t Count() const; | |
| 83 | |
| 84 /** | |
| 85 * Adds or modifies an existing entry in this set of variable values. | |
| 86 * | |
| 87 * @param aName The variable name (not including any "--" prefix that would | |
| 88 * be part of the custom property name) whose value is to be set. | |
| 89 * @param aValue The variable value. | |
| 90 * @param aFirstToken The type of token at the start of the variable value. | |
| 91 * @param aLastToken The type of token at the en of the variable value. | |
| 92 */ | |
| 93 void Put(const nsAString& aName, | |
| 94 nsString aValue, | |
| 95 nsCSSTokenSerializationType aFirstToken, | |
| 96 nsCSSTokenSerializationType aLastToken); | |
| 97 | |
| 98 /** | |
| 99 * Copies the variables from this object into aResolver, marking them as | |
| 100 * computed, inherited values. | |
| 101 */ | |
| 102 void AddVariablesToResolver(CSSVariableResolver* aResolver) const; | |
| 103 | |
| 104 private: | |
| 105 struct Variable | |
| 106 { | |
| 107 Variable() | |
| 108 : mFirstToken(eCSSTokenSerialization_Nothing) | |
| 109 , mLastToken(eCSSTokenSerialization_Nothing) | |
| 110 {} | |
| 111 | |
| 112 Variable(const nsAString& aVariableName, | |
| 113 nsString aValue, | |
| 114 nsCSSTokenSerializationType aFirstToken, | |
| 115 nsCSSTokenSerializationType aLastToken) | |
| 116 : mVariableName(aVariableName) | |
| 117 , mValue(aValue) | |
| 118 , mFirstToken(aFirstToken) | |
| 119 , mLastToken(aLastToken) | |
| 120 {} | |
| 121 | |
| 122 nsString mVariableName; | |
| 123 nsString mValue; | |
| 124 nsCSSTokenSerializationType mFirstToken; | |
| 125 nsCSSTokenSerializationType mLastToken; | |
| 126 }; | |
| 127 | |
| 128 /** | |
| 129 * Adds all the variables from aOther into this object. | |
| 130 */ | |
| 131 void CopyVariablesFrom(const CSSVariableValues& aOther); | |
| 132 | |
| 133 /** | |
| 134 * Map of variable names to IDs. Variable IDs are indexes into | |
| 135 * mVariables. | |
| 136 */ | |
| 137 nsDataHashtable<nsStringHashKey, size_t> mVariableIDs; | |
| 138 | |
| 139 /** | |
| 140 * Array of variables, indexed by variable ID. | |
| 141 */ | |
| 142 nsTArray<Variable> mVariables; | |
| 143 }; | |
| 144 | |
| 145 } // namespace mozilla | |
| 146 | |
| 147 #endif |
