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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef PPAPI_CPP_DEV_VAR_ARRAY_DEV_H_ | |
6 #define PPAPI_CPP_DEV_VAR_ARRAY_DEV_H_ | |
7 | |
8 #include "ppapi/c/pp_bool.h" | |
9 #include "ppapi/c/pp_stdint.h" | |
10 #include "ppapi/cpp/var.h" | |
11 | |
12 /// @file | |
13 /// This file defines the API for interacting with array vars. | |
14 | |
15 namespace pp { | |
16 | |
17 class VarArray_Dev : public Var { | |
18 public: | |
19 /// Constructs a new array var. | |
20 VarArray_Dev(); | |
21 | |
22 /// Constructs a <code>VarArray_Dev</code> given a var for which is_array() is | |
23 /// true. This will refer to the same array var, but allow you to access | |
24 /// methods specific to arrays. | |
25 /// | |
26 /// @param[in] var An array var. | |
27 explicit VarArray_Dev(const Var& var); | |
28 | |
29 /// Constructs a <code>VarArray_Dev</code> given a <code>PP_Var</code> of type | |
30 /// PP_VARTYPE_ARRAY. | |
31 /// | |
32 /// @param[in] var A <code>PP_Var</code> of type PP_VARTYPE_ARRAY. | |
33 explicit VarArray_Dev(const PP_Var& var); | |
34 | |
35 /// Copy constructor. | |
36 VarArray_Dev(const VarArray_Dev& other); | |
37 | |
38 virtual ~VarArray_Dev(); | |
39 | |
40 /// Assignment operator. | |
41 VarArray_Dev& operator=(const VarArray_Dev& other); | |
42 | |
43 /// The <code>Var</code> assignment operator is overridden here so that we can | |
44 /// check for assigning a non-array var to a <code>VarArray_Dev</code>. | |
45 /// | |
46 /// @param[in] other The array var to be assigned. | |
47 /// | |
48 /// @return The resulting <code>VarArray_Dev</code> (as a <code>Var</code>&). | |
49 virtual Var& operator=(const Var& other); | |
50 | |
51 /// Gets an element from the array. | |
52 /// | |
53 /// @param[in] index An index indicating which element to return. | |
54 /// | |
55 /// @return The element at the specified position. If <code>index</code> is | |
56 /// larger than or equal to the array length, an undefined var is returned. | |
57 Var Get(uint32_t index) const; | |
58 | |
59 /// Sets the value of an element in the array. | |
60 /// | |
61 /// @param[in] index An index indicating which element to modify. If | |
62 /// <code>index</code> is larger than or equal to the array length, the length | |
63 /// is updated to be <code>index</code> + 1. Any position in the array that | |
64 /// hasn't been set before is set to undefined, i.e., <code>PP_Var</code> of | |
65 /// type <code>PP_VARTYPE_UNDEFINED</code>. | |
66 /// @param[in] value The value to set. | |
67 /// | |
68 /// @return A <code>PP_Bool</code> indicating whether the operation succeeds. | |
69 PP_Bool Set(uint32_t index, const Var& value); | |
70 | |
71 /// Gets the array length. | |
72 /// | |
73 /// @return The array length. | |
74 uint32_t GetLength() const; | |
75 | |
76 /// Sets the array length. | |
77 /// | |
78 /// @param[in] length The new array length. If <code>length</code> is smaller | |
79 /// than its current value, the array is truncated to the new length; any | |
80 /// elements that no longer fit are removed. If <code>length</code> is larger | |
81 /// than its current value, undefined vars are appended to increase the array | |
82 /// to the specified length. | |
83 /// | |
84 /// @return A <code>PP_Bool</code> indicating whether the operation succeeds. | |
85 PP_Bool SetLength(uint32_t length); | |
86 }; | |
87 | |
88 } // namespace pp | |
89 | |
90 #endif // PPAPI_CPP_DEV_VAR_ARRAY_DEV_H_ | |
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