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comparison: embedding/components/commandhandler/src/nsControllerCommandTable.cpp
embedding/components/commandhandler/src/nsControllerCommandTable.cpp
- changeset 0
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| -1:000000000000 | 0:58d9251d40ab |
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| 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/. */ | |
| 5 | |
| 6 #include "nsString.h" | |
| 7 #include "nsIControllerCommand.h" | |
| 8 #include "nsControllerCommandTable.h" | |
| 9 | |
| 10 // prototype; | |
| 11 nsresult | |
| 12 NS_NewControllerCommandTable(nsIControllerCommandTable** aResult); | |
| 13 | |
| 14 | |
| 15 // this value is used to size the hash table. Just a sensible upper bound | |
| 16 #define NUM_COMMANDS_BOUNDS 64 | |
| 17 | |
| 18 | |
| 19 nsControllerCommandTable::nsControllerCommandTable() | |
| 20 : mCommandsTable(NUM_COMMANDS_BOUNDS) | |
| 21 , mMutable(true) | |
| 22 { | |
| 23 } | |
| 24 | |
| 25 | |
| 26 nsControllerCommandTable::~nsControllerCommandTable() | |
| 27 { | |
| 28 } | |
| 29 | |
| 30 NS_IMPL_ISUPPORTS(nsControllerCommandTable, nsIControllerCommandTable, nsISupportsWeakReference) | |
| 31 | |
| 32 NS_IMETHODIMP | |
| 33 nsControllerCommandTable::MakeImmutable(void) | |
| 34 { | |
| 35 mMutable = false; | |
| 36 return NS_OK; | |
| 37 } | |
| 38 | |
| 39 NS_IMETHODIMP | |
| 40 nsControllerCommandTable::RegisterCommand(const char * aCommandName, nsIControllerCommand *aCommand) | |
| 41 { | |
| 42 NS_ENSURE_TRUE(mMutable, NS_ERROR_FAILURE); | |
| 43 | |
| 44 mCommandsTable.Put(nsDependentCString(aCommandName), aCommand); | |
| 45 | |
| 46 return NS_OK; | |
| 47 } | |
| 48 | |
| 49 | |
| 50 NS_IMETHODIMP | |
| 51 nsControllerCommandTable::UnregisterCommand(const char * aCommandName, nsIControllerCommand *aCommand) | |
| 52 { | |
| 53 NS_ENSURE_TRUE(mMutable, NS_ERROR_FAILURE); | |
| 54 | |
| 55 nsDependentCString commandKey(aCommandName); | |
| 56 | |
| 57 if (!mCommandsTable.Get(commandKey, nullptr)) { | |
| 58 return NS_ERROR_FAILURE; | |
| 59 } | |
| 60 | |
| 61 mCommandsTable.Remove(commandKey); | |
| 62 return NS_OK; | |
| 63 } | |
| 64 | |
| 65 | |
| 66 NS_IMETHODIMP | |
| 67 nsControllerCommandTable::FindCommandHandler(const char * aCommandName, nsIControllerCommand **outCommand) | |
| 68 { | |
| 69 NS_ENSURE_ARG_POINTER(outCommand); | |
| 70 | |
| 71 *outCommand = nullptr; | |
| 72 | |
| 73 nsCOMPtr<nsIControllerCommand> foundCommand; | |
| 74 mCommandsTable.Get(nsDependentCString(aCommandName), getter_AddRefs(foundCommand)); | |
| 75 if (!foundCommand) return NS_ERROR_FAILURE; | |
| 76 | |
| 77 foundCommand.forget(outCommand); | |
| 78 return NS_OK; | |
| 79 } | |
| 80 | |
| 81 | |
| 82 | |
| 83 /* boolean isCommandEnabled (in wstring command); */ | |
| 84 NS_IMETHODIMP | |
| 85 nsControllerCommandTable::IsCommandEnabled(const char * aCommandName, nsISupports *aCommandRefCon, bool *aResult) | |
| 86 { | |
| 87 NS_ENSURE_ARG_POINTER(aResult); | |
| 88 | |
| 89 *aResult = false; | |
| 90 | |
| 91 // find the command | |
| 92 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 93 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 94 if (!commandHandler) | |
| 95 { | |
| 96 #if DEBUG | |
| 97 NS_WARNING("Controller command table asked about a command that it does not handle -- "); | |
| 98 #endif | |
| 99 return NS_OK; // we don't handle this command | |
| 100 } | |
| 101 | |
| 102 return commandHandler->IsCommandEnabled(aCommandName, aCommandRefCon, aResult); | |
| 103 } | |
| 104 | |
| 105 | |
| 106 NS_IMETHODIMP | |
| 107 nsControllerCommandTable::UpdateCommandState(const char * aCommandName, nsISupports *aCommandRefCon) | |
| 108 { | |
| 109 // find the command | |
| 110 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 111 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 112 if (!commandHandler) | |
| 113 { | |
| 114 #if DEBUG | |
| 115 NS_WARNING("Controller command table asked to update the state of a command that it does not handle -- "); | |
| 116 #endif | |
| 117 return NS_OK; // we don't handle this command | |
| 118 } | |
| 119 | |
| 120 return NS_ERROR_NOT_IMPLEMENTED; | |
| 121 } | |
| 122 | |
| 123 NS_IMETHODIMP | |
| 124 nsControllerCommandTable::SupportsCommand(const char * aCommandName, nsISupports *aCommandRefCon, bool *aResult) | |
| 125 { | |
| 126 NS_ENSURE_ARG_POINTER(aResult); | |
| 127 | |
| 128 // XXX: need to check the readonly and disabled states | |
| 129 | |
| 130 *aResult = false; | |
| 131 | |
| 132 // find the command | |
| 133 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 134 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 135 | |
| 136 *aResult = (commandHandler.get() != nullptr); | |
| 137 return NS_OK; | |
| 138 } | |
| 139 | |
| 140 /* void doCommand (in wstring command); */ | |
| 141 NS_IMETHODIMP | |
| 142 nsControllerCommandTable::DoCommand(const char * aCommandName, nsISupports *aCommandRefCon) | |
| 143 { | |
| 144 // find the command | |
| 145 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 146 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 147 if (!commandHandler) | |
| 148 { | |
| 149 #if DEBUG | |
| 150 NS_WARNING("Controller command table asked to do a command that it does not handle -- "); | |
| 151 #endif | |
| 152 return NS_OK; // we don't handle this command | |
| 153 } | |
| 154 | |
| 155 return commandHandler->DoCommand(aCommandName, aCommandRefCon); | |
| 156 } | |
| 157 | |
| 158 NS_IMETHODIMP | |
| 159 nsControllerCommandTable::DoCommandParams(const char *aCommandName, nsICommandParams *aParams, nsISupports *aCommandRefCon) | |
| 160 { | |
| 161 // find the command | |
| 162 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 163 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 164 if (!commandHandler) | |
| 165 { | |
| 166 #if DEBUG | |
| 167 NS_WARNING("Controller command table asked to do a command that it does not handle -- "); | |
| 168 #endif | |
| 169 return NS_OK; // we don't handle this command | |
| 170 } | |
| 171 return commandHandler->DoCommandParams(aCommandName, aParams, aCommandRefCon); | |
| 172 } | |
| 173 | |
| 174 | |
| 175 NS_IMETHODIMP | |
| 176 nsControllerCommandTable::GetCommandState(const char *aCommandName, nsICommandParams *aParams, nsISupports *aCommandRefCon) | |
| 177 { | |
| 178 // find the command | |
| 179 nsCOMPtr<nsIControllerCommand> commandHandler; | |
| 180 FindCommandHandler(aCommandName, getter_AddRefs(commandHandler)); | |
| 181 if (!commandHandler) | |
| 182 { | |
| 183 #if DEBUG | |
| 184 NS_WARNING("Controller command table asked to do a command that it does not handle -- "); | |
| 185 #endif | |
| 186 return NS_OK; // we don't handle this command | |
| 187 } | |
| 188 return commandHandler->GetCommandStateParams(aCommandName, aParams, aCommandRefCon); | |
| 189 } | |
| 190 | |
| 191 | |
| 192 nsresult | |
| 193 NS_NewControllerCommandTable(nsIControllerCommandTable** aResult) | |
| 194 { | |
| 195 NS_PRECONDITION(aResult != nullptr, "null ptr"); | |
| 196 if (! aResult) | |
| 197 return NS_ERROR_NULL_POINTER; | |
| 198 | |
| 199 nsControllerCommandTable* newCommandTable = new nsControllerCommandTable(); | |
| 200 if (! newCommandTable) | |
| 201 return NS_ERROR_OUT_OF_MEMORY; | |
| 202 | |
| 203 NS_ADDREF(newCommandTable); | |
| 204 *aResult = newCommandTable; | |
| 205 return NS_OK; | |
| 206 } |
