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| 1 /* Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 /* Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| 2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
| 3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
| 4 */ | 4 */ |
| 5 #ifndef PPAPI_C_PPB_VAR_H_ | 5 #ifndef PPAPI_C_PPB_VAR_H_ |
| 6 #define PPAPI_C_PPB_VAR_H_ | 6 #define PPAPI_C_PPB_VAR_H_ |
| 7 | 7 |
| 8 #include "ppapi/c/pp_bool.h" | 8 #include "ppapi/c/pp_bool.h" |
| 9 #include "ppapi/c/pp_instance.h" | 9 #include "ppapi/c/pp_instance.h" |
| 10 #include "ppapi/c/pp_macros.h" | 10 #include "ppapi/c/pp_macros.h" |
| 11 #include "ppapi/c/pp_module.h" | 11 #include "ppapi/c/pp_module.h" |
| 12 #include "ppapi/c/pp_resource.h" | 12 #include "ppapi/c/pp_resource.h" |
| 13 #include "ppapi/c/pp_stdint.h" | 13 #include "ppapi/c/pp_stdint.h" |
| 14 #include "ppapi/c/pp_var.h" | 14 #include "ppapi/c/pp_var.h" |
| 15 | 15 |
| 16 #define PPB_VAR_INTERFACE "PPB_Var;0.4" | 16 #define PPB_VAR_INTERFACE "PPB_Var;0.4" |
| 17 | 17 |
| 18 /** | 18 /** |
| 19 * @file | 19 * @file |
| 20 * Defines the API ... | 20 * This file defines the PPB_Var struct. |
| 21 */ | 21 */ |
| 22 | 22 |
| 23 /** | 23 /** |
| 24 * | 24 * |
| 25 * @addtogroup Enums | 25 * @addtogroup Enums |
| 26 * @{ | 26 * @{ |
| 27 */ | 27 */ |
| 28 | 28 |
| 29 /** | 29 /** |
| 30 * Defines the PPB_Var struct. | |
| 31 * See http://code.google.com/p/ppapi/wiki/InterfacingWithJavaScript | 30 * See http://code.google.com/p/ppapi/wiki/InterfacingWithJavaScript |
| 32 * for general information on using this interface. | 31 * for general information on using this interface. |
| 33 * {PENDING: Should the generated doc really be pointing to methods?} | |
| 34 */ | 32 */ |
| 33 // PENDING: Should the generated doc really be pointing to methods? |
| 35 enum PP_ObjectProperty_Modifier { | 34 enum PP_ObjectProperty_Modifier { |
| 36 PP_OBJECTPROPERTY_MODIFIER_NONE = 0, | 35 PP_OBJECTPROPERTY_MODIFIER_NONE = 0, |
| 37 PP_OBJECTPROPERTY_MODIFIER_READONLY = 1 << 0, | 36 PP_OBJECTPROPERTY_MODIFIER_READONLY = 1 << 0, |
| 38 PP_OBJECTPROPERTY_MODIFIER_DONTENUM = 1 << 1, | 37 PP_OBJECTPROPERTY_MODIFIER_DONTENUM = 1 << 1, |
| 39 PP_OBJECTPROPERTY_MODIFIER_DONTDELETE = 1 << 2, | 38 PP_OBJECTPROPERTY_MODIFIER_DONTDELETE = 1 << 2, |
| 40 PP_OBJECTPROPERTY_MODIFIER_HASVALUE = 1 << 3 | 39 PP_OBJECTPROPERTY_MODIFIER_HASVALUE = 1 << 3 |
| 41 }; | 40 }; |
| 42 PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES(PP_ObjectProperty_Modifier, 4); | 41 PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES(PP_ObjectProperty_Modifier, 4); |
| 43 /** | 42 /** |
| 44 * @} | 43 * @} |
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| 93 * | 92 * |
| 94 * Make sure not to intermix non-JS with JS calls when relying on this behavior | 93 * Make sure not to intermix non-JS with JS calls when relying on this behavior |
| 95 * to catch JS exceptions, as non-JS functions will still execute! | 94 * to catch JS exceptions, as non-JS functions will still execute! |
| 96 | 95 |
| 97 * JS engine's exceptions will always be of type PP_VARTYPE_OBJECT. However, | 96 * JS engine's exceptions will always be of type PP_VARTYPE_OBJECT. However, |
| 98 * PP_Var interface can also throw PP_VARTYPE_STRING exceptions, in situations | 97 * PP_Var interface can also throw PP_VARTYPE_STRING exceptions, in situations |
| 99 * where there's no JS execution context defined. These are usually invalid | 98 * where there's no JS execution context defined. These are usually invalid |
| 100 * parameter errors - passing an invalid PP_Var value, for example, will always | 99 * parameter errors - passing an invalid PP_Var value, for example, will always |
| 101 * result in an PP_VARTYPE_STRING exception. Exceptions will not be of any other | 100 * result in an PP_VARTYPE_STRING exception. Exceptions will not be of any other |
| 102 * type. | 101 * type. |
| 103 * TODO(neb): Specify the exception for ill-formed PP_Vars, invalid module, | |
| 104 * instance, resource, string and object ids. | |
| 105 * | 102 * |
| 106 */ | 103 */ |
| 104 |
| 105 // TODO(neb): Specify the exception for ill-formed PP_Vars, invalid module, |
| 106 // instance, resource, string and object ids. |
| 107 struct PPB_Var { | 107 struct PPB_Var { |
| 108 /** | 108 /** |
| 109 * Adds a reference to the given var. If this is not a refcounted object, | 109 * Adds a reference to the given var. If this is not a refcounted object, |
| 110 * this function will do nothing so you can always call it no matter what the | 110 * this function will do nothing so you can always call it no matter what the |
| 111 * type. | 111 * type. |
| 112 */ | 112 */ |
| 113 void (*AddRef)(struct PP_Var var); | 113 void (*AddRef)(struct PP_Var var); |
| 114 | 114 |
| 115 /** | 115 /** |
| 116 * Removes a reference to given var, deleting it if the internal refcount | 116 * Removes a reference to given var, deleting it if the internal refcount |
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| 163 */ | 163 */ |
| 164 struct PP_Var (*ConvertType)(PP_Instance instance, | 164 struct PP_Var (*ConvertType)(PP_Instance instance, |
| 165 struct PP_Var var, | 165 struct PP_Var var, |
| 166 PP_VarType new_type, | 166 PP_VarType new_type, |
| 167 struct PP_Var* exception); | 167 struct PP_Var* exception); |
| 168 | 168 |
| 169 /** | 169 /** |
| 170 * Sets a property on the object, similar to Object.prototype.defineProperty. | 170 * Sets a property on the object, similar to Object.prototype.defineProperty. |
| 171 * | 171 * |
| 172 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. | 172 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. |
| 173 * TODO(neb): Specify the exception. Ideally, it would be a TypeError, but | |
| 174 * don't have the JS context to create new objects, we might throw a string. | |
| 175 * Then, the property's 'name' field is converted to string using | 173 * Then, the property's 'name' field is converted to string using |
| 176 * ConvertType (ToString [9.8]). | 174 * ConvertType (ToString [9.8]). |
| 177 * After that, defineOwnProperty [8.12.9, 15.4.5.1] is called with the | 175 * After that, defineOwnProperty [8.12.9, 15.4.5.1] is called with the |
| 178 * property. | 176 * property. |
| 179 * To set a simple property, set the value and set modifiers to default | 177 * To set a simple property, set the value and set modifiers to default |
| 180 * (Writable|Enumerable|Configurable|HasValue), see [8.12.15] and | 178 * (Writable|Enumerable|Configurable|HasValue), see [8.12.15] and |
| 181 * function PPB_MakeSimpleProperty. | 179 * function PPB_MakeSimpleProperty. |
| 182 */ | 180 */ |
| 181 |
| 182 // TODO(neb): Specify the exception. Ideally, it would be a TypeError, but |
| 183 // don't have the JS context to create new objects, we might throw a string. |
| 183 void (*DefineProperty)(struct PP_Var object, | 184 void (*DefineProperty)(struct PP_Var object, |
| 184 struct PP_ObjectProperty property, | 185 struct PP_ObjectProperty property, |
| 185 struct PP_Var* exception); | 186 struct PP_Var* exception); |
| 186 | 187 |
| 187 /** | 188 /** |
| 188 * Tests whether an object has a property with a given name. | 189 * Tests whether an object has a property with a given name. |
| 189 * | 190 * |
| 190 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. | 191 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. |
| 191 * TODO(neb): Specify the exception. Ideally, it would be a TypeError, but | |
| 192 * don't have the JS context to create new objects, we might throw a string. | |
| 193 * Then, convert 'property' to string using ConvertType (ToString [9.8]). | 192 * Then, convert 'property' to string using ConvertType (ToString [9.8]). |
| 194 * Then return true if the given property exists on the object [8.12.6]. | 193 * Then return true if the given property exists on the object [8.12.6]. |
| 195 */ | 194 */ |
| 195 |
| 196 // TODO(neb): Specify the exception. Ideally, it would be a TypeError, but |
| 197 // don't have the JS context to create new objects, we might throw a string. |
| 196 PP_Bool (*HasProperty)(struct PP_Var object, | 198 PP_Bool (*HasProperty)(struct PP_Var object, |
| 197 struct PP_Var property, | 199 struct PP_Var property, |
| 198 struct PP_Var* exception); | 200 struct PP_Var* exception); |
| 199 | 201 |
| 200 /** | 202 /** |
| 201 * Returns a given property of the object. | 203 * Returns a given property of the object. |
| 202 * | 204 * |
| 203 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. | 205 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. |
| 204 * TODO(neb): Specify the exception. Ideally, it would be a TypeError, but | |
| 205 * don't have the JS context to create new objects, we might throw a string. | |
| 206 * Then, convert 'property' to string using ConvertType (ToString [9.8]). | 206 * Then, convert 'property' to string using ConvertType (ToString [9.8]). |
| 207 * Then return the given property of the object [8.12.2]. | 207 * Then return the given property of the object [8.12.2]. |
| 208 */ | 208 */ |
| 209 |
| 210 // TODO(neb): Specify the exception. Ideally, it would be a TypeError, but |
| 211 // don't have the JS context to create new objects, we might throw a string. |
| 209 struct PP_Var (*GetProperty)(struct PP_Var object, | 212 struct PP_Var (*GetProperty)(struct PP_Var object, |
| 210 struct PP_Var property, | 213 struct PP_Var property, |
| 211 struct PP_Var* exception); | 214 struct PP_Var* exception); |
| 212 | 215 |
| 213 /** | 216 /** |
| 214 * Delete a property from the object, return true if succeeded. | 217 * Delete a property from the object, return true if succeeded. |
| 215 * | 218 * |
| 216 * True is returned if the property didn't exist in the first place. | 219 * True is returned if the property didn't exist in the first place. |
| 217 * | 220 * |
| 218 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. | 221 * First, if object is not PP_VARTYPE_OBJECT, throw an exception. |
| 219 * TODO(neb): Specify the exception. Ideally, it would be a TypeError, but | |
| 220 * don't have the JS context to create new objects, we might throw a string. | |
| 221 * Then, convert 'property' to string using ConvertType (ToString [9.8]). | 222 * Then, convert 'property' to string using ConvertType (ToString [9.8]). |
| 222 * Then delete the given property of the object [8.12.7]. | 223 * Then delete the given property of the object [8.12.7]. |
| 223 */ | 224 */ |
| 225 |
| 226 // TODO(neb): Specify the exception. Ideally, it would be a TypeError, but |
| 227 // don't have the JS context to create new objects, we might throw a string. |
| 224 PP_Bool (*DeleteProperty)(struct PP_Var object, | 228 PP_Bool (*DeleteProperty)(struct PP_Var object, |
| 225 struct PP_Var property, | 229 struct PP_Var property, |
| 226 struct PP_Var* exception); | 230 struct PP_Var* exception); |
| 227 | 231 |
| 228 /** | 232 /** |
| 229 * Retrieves all property names on the given object. Property names include | 233 * Retrieves all property names on the given object. Property names include |
| 230 * methods. | 234 * methods. |
| 231 * | 235 * |
| 232 * If object is not PP_VARTYPE_OBJECT, throw an exception. | 236 * If object is not PP_VARTYPE_OBJECT, throw an exception. |
| 233 * TODO(neb): Specify the exception. Ideally, it would be a TypeError, but | |
| 234 * don't have the JS context to create new objects, we might throw a string. | |
| 235 * | 237 * |
| 236 * If there is a failure, the given exception will be set (if it is non-NULL). | 238 * If there is a failure, the given exception will be set (if it is non-NULL). |
| 237 * On failure, |*properties| will be set to NULL and |*property_count| will be | 239 * On failure, |*properties| will be set to NULL and |*property_count| will be |
| 238 * set to 0. | 240 * set to 0. |
| 239 * | 241 * |
| 240 * A pointer to the array of property names will be placed in |*properties|. | 242 * A pointer to the array of property names will be placed in |*properties|. |
| 241 * The caller is responsible for calling Release() on each of these properties | 243 * The caller is responsible for calling Release() on each of these properties |
| 242 * (as per normal refcounted memory management) as well as freeing the array | 244 * (as per normal refcounted memory management) as well as freeing the array |
| 243 * pointer with PPB_Core.MemFree(). | 245 * pointer with PPB_Core.MemFree(). |
| 244 * | 246 * |
| 245 * This function returns all "enumerable" properties. Some JavaScript | 247 * This function returns all "enumerable" properties. Some JavaScript |
| 246 * properties are "hidden" and these properties won't be retrieved by this | 248 * properties are "hidden" and these properties won't be retrieved by this |
| 247 * function, yet you can still set and get them. You can use JS | 249 * function, yet you can still set and get them. You can use JS |
| 248 * Object.getOwnPropertyNames() to access these properties. | 250 * Object.getOwnPropertyNames() to access these properties. |
| 249 * | 251 * |
| 250 * Example: | 252 * Example: |
| 251 * <pre> uint32_t count; | 253 * <pre> uint32_t count; |
| 252 * PP_Var* properties; | 254 * PP_Var* properties; |
| 253 * ppb_var.EnumerateProperties(object, &count, &properties); | 255 * ppb_var.EnumerateProperties(object, &count, &properties); |
| 254 * | 256 * |
| 255 * ...use the properties here... | 257 * ...use the properties here... |
| 256 * | 258 * |
| 257 * for (uint32_t i = 0; i < count; i++) | 259 * for (uint32_t i = 0; i < count; i++) |
| 258 * ppb_var.Release(properties[i]); | 260 * ppb_var.Release(properties[i]); |
| 259 * ppb_core.MemFree(properties); </pre> | 261 * ppb_core.MemFree(properties); </pre> |
| 260 */ | 262 */ |
| 263 |
| 264 // TODO(neb): Specify the exception. Ideally, it would be a TypeError, but |
| 265 // don't have the JS context to create new objects, we might throw a string. |
| 261 void (*EnumerateProperties)(struct PP_Var object, | 266 void (*EnumerateProperties)(struct PP_Var object, |
| 262 uint32_t* property_count, | 267 uint32_t* property_count, |
| 263 struct PP_Var** properties, | 268 struct PP_Var** properties, |
| 264 struct PP_Var* exception); | 269 struct PP_Var* exception); |
| 265 | 270 |
| 266 /** | 271 /** |
| 267 * Check if an object is a JS Function [9.11]. | 272 * Check if an object is a JS Function [9.11]. |
| 268 */ | 273 */ |
| 269 PP_Bool (*IsCallable)(struct PP_Var object); | 274 PP_Bool (*IsCallable)(struct PP_Var object); |
| 270 | 275 |
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| 329 result.setter = PP_MakeUndefined(); | 334 result.setter = PP_MakeUndefined(); |
| 330 result.modifiers = PP_OBJECTPROPERTY_MODIFIER_HASVALUE; | 335 result.modifiers = PP_OBJECTPROPERTY_MODIFIER_HASVALUE; |
| 331 return result; | 336 return result; |
| 332 } | 337 } |
| 333 /** | 338 /** |
| 334 * @} | 339 * @} |
| 335 */ | 340 */ |
| 336 | 341 |
| 337 #endif /* PPAPI_C_PPB_VAR_H_ */ | 342 #endif /* PPAPI_C_PPB_VAR_H_ */ |
| 338 | 343 |
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