nsIWindowsRegKey in Firefox 2.0

Implemented by

@mozilla.org/windows-registry-key;1

 This interface is designed to provide scriptable access to the Windows
 registry system ("With Great Power Comes Great Responsibility").  The
 interface represents a single key in the registry.

 This interface is highly Win32 specific.

[scriptable, uuid(2555b930-d64f-437e-9be7-0a2cb252c1f4)]

Constants

 Root keys.  The values for these keys correspond to the values from
 WinReg.h in the MS Platform SDK.  The ROOT_KEY_ prefix corresponds to the
 HKEY_ prefix in the MS Platform SDK.

 This interface is not restricted to using only these root keys.

const unsigned long ROOT_KEY_CLASSES_ROOT = 2147483648

const unsigned long ROOT_KEY_CURRENT_USER = 2147483649

const unsigned long ROOT_KEY_LOCAL_MACHINE = 2147483650

 Values for the mode parameter passed to the open and create methods.
 The values defined here correspond to the REGSAM values defined in
 WinNT.h in the MS Platform SDK, where ACCESS_ is replaced with KEY_.

 This interface is not restricted to using only these access types.

const unsigned long ACCESS_BASIC = 131072

const unsigned long ACCESS_QUERY_VALUE = 1

const unsigned long ACCESS_SET_VALUE = 2

const unsigned long ACCESS_CREATE_SUB_KEY = 4

const unsigned long ACCESS_ENUMERATE_SUB_KEYS = 8

const unsigned long ACCESS_NOTIFY = 16

const unsigned long ACCESS_READ = 131097

const unsigned long ACCESS_WRITE = 131078

const unsigned long ACCESS_ALL = 131103

 Values for the type of a registry value.  The numeric values of these
 constants are taken directly from WinNT.h in the MS Platform SDK.
 The Microsoft documentation should be consulted for the exact meaning of
 these value types.

 This interface is somewhat restricted to using only these value types.
 There is no method that is directly equivalent to RegQueryValueEx or
 RegSetValueEx.  In particular, this interface does not support the
 REG_MULTI_SZ and REG_EXPAND_SZ value types.  It is still possible to
 enumerate values that have other types (i.e., getValueType may return a
 type not defined below).

const unsigned long TYPE_NONE = 0

const unsigned long TYPE_STRING = 1

const unsigned long TYPE_BINARY = 3

const unsigned long TYPE_INT = 4

const unsigned long TYPE_INT64 = 11

Attributes

 This attribute returns the number of child keys.

readonly attribute unsigned long childCount

 This attribute exposes the native HKEY and is available to provide C++
 consumers with the flexibility of making other Windows registry API calls
 that are not exposed via this interface.
 
 It is possible to initialize this object by setting an HKEY on it.  In
 that case, it is the responsibility of the consumer setting the HKEY to
 ensure that it is a valid HKEY.

 WARNING: Setting the key does not close the old key.

[noscript] attribute HKEY key

 This attribute returns the number of values under this key.

readonly attribute unsigned long valueCount

Methods

 This method closes the key.  If the key is already closed, then this
 method does nothing.

void close()

 This method opens an existing key or creates a new key.

 NOTE: On 32-bit Windows, it is valid to pass any HKEY as the rootKey
 parameter of this function.  However, for compatibility with 64-bit
 Windows, that usage should probably be avoided in favor of createChild.

 @param rootKey
        A root key defined above or any valid HKEY on 32-bit Windows.
 @param relPath
        A relative path from the given root key.
 @param mode
        Access mode, which is a bit-wise OR of the ACCESS_ values defined
        above.

void create(in unsigned long rootKey, in AString relPath, in unsigned long mode)

 This method opens or creates a subkey relative to this key.

 @return nsIWindowsRegKey for the newly opened or created subkey.

nsIWindowsRegKey createChild(in AString relPath, in unsigned long mode)

 This method returns the name of the n'th child key.

 @param index
        The index of the requested child key.

AString getChildName(in unsigned long index)

 This method returns the name of the n'th value under this key.

 @param index
        The index of the requested value.

AString getValueName(in unsigned long index)

 This method returns the type of the value with the given name.  The return
 value is one of the "TYPE_" constants defined above.

 @param name
        The name of the value to query.

unsigned long getValueType(in AString name)

 This method returns true if the key has changed and false otherwise.
 This method will always return false if startWatching was not called.

boolean hasChanged()

 This method checks to see if the key has a child by the given name.

 @param name
        The name of the requested child key.

boolean hasChild(in AString name)

 This method checks to see if the key has a value by the given name.

 @param name
        The name of the requested value.

boolean hasValue(in AString name)

 This method returns true if the key is being watched for changes (i.e.,
 if startWatching() was called).

boolean isWatching()

 This method opens an existing key.  This method fails if the key
 does not exist.

 NOTE: On 32-bit Windows, it is valid to pass any HKEY as the rootKey
 parameter of this function.  However, for compatibility with 64-bit
 Windows, that usage should probably be avoided in favor of openChild.

 @param rootKey
        A root key defined above or any valid HKEY on 32-bit Windows.
 @param relPath
        A relative path from the given root key.
 @param mode
        Access mode, which is a bit-wise OR of the ACCESS_ values defined
        above.

void open(in unsigned long rootKey, in AString relPath, in unsigned long mode)

 This method opens a subkey relative to this key.  This method fails if the
 key does not exist.

 @return nsIWindowsRegKey for the newly opened subkey.

nsIWindowsRegKey openChild(in AString relPath, in unsigned long mode)

 This method reads the binary contents of the named value under this key.

 JavaScript callers should take care with the result of this method since
 it will be byte-expanded to form a JS string.  (The binary data will be
 treated as an ISO-Latin-1 character string, which it is not).

 @param name
        The name of the value to query.

ACString readBinaryValue(in AString name)

 This method reads the 64-bit integer contents of the named value.

 @param name
        The name of the value to query.

unsigned long long readInt64Value(in AString name)

 This method reads the integer contents of the named value.

 @param name
        The name of the value to query.

unsigned long readIntValue(in AString name)

 This method reads the string contents of the named value as a Unicode
 string.

 @param name
        The name of the value to query.  This parameter can be the empty
        string to request the key's default value.

AString readStringValue(in AString name)

 This method removes a child key and all of its values.  This method will
 fail if the key has any children of its own. 

 @param relPath
        The relative path from this key to the key to be removed.

void removeChild(in AString relPath)

 This method removes the value with the given name.

 @param name
        The name of the value to be removed.

void removeValue(in AString name)

 This method starts watching the key to see if any of its values have
 changed.  The key must have been opened with mode including ACCESS_NOTIFY.
 If recurse is true, then this key and any of its descendant keys are
 watched.  Otherwise, only this key is watched.

 @param recurse
        Indicates whether or not to also watch child keys.

void startWatching(in boolean recurse)

 This method stops any watching of the key initiated by a call to
 startWatching.  This method does nothing if the key is not being watched.

void stopWatching()

 This method writes the binary contents of the named value.  The value will
 be created if it does not already exist.
 
 JavaScript callers should take care with the value passed to this method
 since it will be truncated from a JS string (unicode) to a ISO-Latin-1
 string.  (The binary data will be treated as an ISO-Latin-1 character
 string, which it is not).  So, JavaScript callers should only pass
 character values in the range u0000 to u00FF, or else data loss will
 occur.

 @param name
        The name of the value to modify.
 @param data
        The data for the value to modify.

void writeBinaryValue(in AString name, in ACString data)

 This method writes the 64-bit integer contents of the named value.  The
 value will be created if it does not already exist.

 @param name
        The name of the value to modify.
 @param data
        The data for the value to modify.

void writeInt64Value(in AString name, in unsigned long long data)

 This method writes the integer contents of the named value.  The value
 will be created if it does not already exist.

 @param name
        The name of the value to modify.
 @param data
        The data for the value to modify.

void writeIntValue(in AString name, in unsigned long data)

 This method writes the unicode string contents of the named value.  The
 value will be created if it does not already exist.

 @param name
        The name of the value to modify.  This parameter can be the empty
        string to modify the key's default value.
 @param data
        The data for the value to modify.

void writeStringValue(in AString name, in AString data)