| 1 | define([ |
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| 2 | "dojo/_base/kernel", |
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| 3 | "dojo/_base/lang", |
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| 4 | "dojo/_base/array", |
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| 5 | "dojo/_base/declare", |
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| 6 | "dojo/Stateful", |
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| 7 | "./getStateful", |
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| 8 | "./getPlainValue", |
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| 9 | "./StatefulArray" |
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| 10 | ], function(kernel, lang, array, declare, Stateful, getStateful, getPlainValue, StatefulArray){ |
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| 11 | |
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| 12 | kernel.deprecated("dojox/mvc/StatefulModel", "Use dojox/mvc/getStateful, dojox/mvc/getPlainValue, dojox/mvc/StatefulArray or one of the dojox/mvc/*RefControllers instead"); |
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| 13 | |
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| 14 | var StatefulModel = declare("dojox.mvc.StatefulModel", [Stateful], { |
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| 15 | // summary: |
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| 16 | // Deprecated. Use dojox/mvc/getStateful, dojox/mvc/getPlainValue, dojox/mvc/StatefulArray or one of the dojox/mvc/*RefControllers instead. |
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| 17 | // The first-class native JavaScript data model based on dojo/Stateful |
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| 18 | // that wraps any data structure(s) that may be relevant for a view, |
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| 19 | // a view portion, a dijit or any custom view layer component. |
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| 20 | // |
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| 21 | // description: |
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| 22 | // A data model is effectively instantiated with a plain JavaScript |
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| 23 | // object which specifies the initial data structure for the model. |
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| 24 | // |
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| 25 | // | var struct = { |
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| 26 | // | order : "abc123", |
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| 27 | // | shipto : { |
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| 28 | // | address : "123 Example St, New York, NY", |
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| 29 | // | phone : "212-000-0000" |
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| 30 | // | }, |
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| 31 | // | items : [ |
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| 32 | // | { part : "x12345", num : 1 }, |
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| 33 | // | { part : "n09876", num : 3 } |
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| 34 | // | ] |
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| 35 | // | }; |
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| 36 | // | |
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| 37 | // | var model = dojox/mvc.newStatefulModel({ data : struct }); |
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| 38 | // |
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| 39 | // The simple example above shows an inline plain JavaScript object |
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| 40 | // illustrating the data structure to prime the model with, however |
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| 41 | // the underlying data may be made available by other means, such as |
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| 42 | // from the results of a dojo/store or dojo/data query. |
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| 43 | // |
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| 44 | // To deal with stores providing immediate values or Promises, a |
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| 45 | // factory method for model instantiation is provided. This method |
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| 46 | // will either return an immediate model or a model Promise depending |
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| 47 | // on the nature of the store. |
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| 48 | // |
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| 49 | // | var model = mvc.newStatefulModel({ store: someStore }); |
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| 50 | // |
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| 51 | // The created data model has the following properties: |
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| 52 | // |
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| 53 | // - It enables dijits or custom components in the view to "bind" to |
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| 54 | // data within the model. A bind creates a bi-directional update |
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| 55 | // mechanism between the bound view and the underlying data: |
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| 56 | // |
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| 57 | // a) The data model is "live" data i.e. it maintains any updates |
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| 58 | // driven by the view on the underlying data. |
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| 59 | // |
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| 60 | // b) The data model issues updates to portions of the view if the |
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| 61 | // data they bind to is updated in the model. For example, if two |
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| 62 | // dijits are bound to the same part of a data model, updating the |
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| 63 | // value of one in the view will cause the data model to issue an |
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| 64 | // update to the other containing the new value. |
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| 65 | // |
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| 66 | // - The data model internally creates a tree of dojo/Stateful |
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| 67 | // objects that matches the input, which is effectively a plain |
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| 68 | // JavaScript object i.e. "pure data". This tree allows dijits or |
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| 69 | // other view components to bind to any node within the data model. |
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| 70 | // Typically, dijits with simple values bind to leaf nodes of the |
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| 71 | // datamodel, whereas containers bind to internal nodes of the |
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| 72 | // datamodel. For example, a datamodel created using the object below |
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| 73 | // will generate the dojo/Stateful tree as shown: |
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| 74 | // |
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| 75 | // | var model = dojox/mvc/newStatefulModel({ data : { |
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| 76 | // | prop1 : "foo", |
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| 77 | // | prop2 : { |
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| 78 | // | leaf1 : "bar", |
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| 79 | // | leaf2 : "baz" |
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| 80 | // | } |
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| 81 | // | }}); |
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| 82 | // | |
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| 83 | // | // The created dojo/Stateful tree is illustrated below (all nodes are dojo/Stateful objects) |
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| 84 | // | // |
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| 85 | // | // o (root node) |
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| 86 | // | // / \ |
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| 87 | // | // (prop1 node) o o (prop2 node) |
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| 88 | // | // / \ |
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| 89 | // | // (leaf1 node) o o (leaf2 node) |
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| 90 | // | // |
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| 91 | // | // The root node is accessed using the expression "model" (the var name above). The prop1 |
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| 92 | // | // node is accessed using the expression "model.prop1", the leaf2 node is accessed using |
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| 93 | // | // the expression "model.prop2.leaf2" and so on. |
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| 94 | // |
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| 95 | // - Each of the dojo/Stateful nodes in the model may store data as well |
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| 96 | // as associated "meta-data", which includes things such as whether |
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| 97 | // the data is required or readOnly etc. This meta-data differs from |
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| 98 | // that maintained by, for example, an individual dijit in that this |
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| 99 | // is maintained by the datamodel and may therefore be affected by |
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| 100 | // datamodel-level constraints that span multiple dijits or even |
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| 101 | // additional criteria such as server-side computations. |
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| 102 | // |
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| 103 | // - When the model is backed by a dojo/store or dojo/data query, the |
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| 104 | // client-side updates can be persisted once the client is ready to |
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| 105 | // "submit" the changes (which may include both value changes or |
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| 106 | // structural changes - adds/deletes). The datamodel allows control |
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| 107 | // over when the underlying data is persisted i.e. this can be more |
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| 108 | // incremental or batched per application needs. |
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| 109 | // |
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| 110 | // There need not be a one-to-one association between a datamodel and |
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| 111 | // a view or portion thereof. For example, multiple datamodels may |
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| 112 | // back the dijits in a view. Indeed, this may be useful where the |
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| 113 | // binding data comes from a number of data sources or queries, for |
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| 114 | // example. Just as well, dijits from multiple portions of the view |
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| 115 | // may be bound to a single datamodel. |
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| 116 | // |
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| 117 | // Finally, requiring this class also enables all dijits to become data |
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| 118 | // binding aware. The data binding is commonly specified declaratively |
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| 119 | // via the "ref" property in the "data-dojo-props" attribute value. |
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| 120 | // |
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| 121 | // To illustrate, the following is the "Hello World" of such data-bound |
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| 122 | // widget examples: |
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| 123 | // |
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| 124 | // |
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| 125 | // | <script> |
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| 126 | // | var model; |
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| 127 | // | require(["dojox/mvc", "dojo/parser"], function(mvc, parser){ |
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| 128 | // | model = mvc.newStatefulModel({ data : { |
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| 129 | // | hello : "Hello World" |
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| 130 | // | }}); |
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| 131 | // | parser.parse(); |
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| 132 | // | }); |
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| 133 | // | </script> |
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| 134 | // | |
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| 135 | // | <input id="helloInput" data-dojo-type="dijit/form/TextBox" |
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| 136 | // | data-dojo-props="ref: 'model.hello'"> |
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| 137 | // |
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| 138 | // Such data binding awareness for dijits is added by extending the |
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| 139 | // dijit/_WidgetBase class to include data binding capabilities |
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| 140 | // provided by dojox/mvc/_DataBindingMixin, and this class declares a |
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| 141 | // dependency on dojox/mvc/_DataBindingMixin. |
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| 142 | // |
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| 143 | // The presence of a data model and the data-binding capabilities |
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| 144 | // outlined above support the flexible development of a number of MVC |
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| 145 | // patterns on the client. As an example, CRUD operations can be |
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| 146 | // supported with minimal application code. |
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| 147 | // |
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| 148 | // tags: |
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| 149 | // deprecated |
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| 150 | |
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| 151 | // data: Object |
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| 152 | // The plain JavaScript object / data structure used to initialize |
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| 153 | // this model. At any point in time, it holds the lasted saved model |
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| 154 | // state. |
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| 155 | // Either data or store property must be provided. |
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| 156 | data: null, |
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| 157 | |
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| 158 | // store: dojo/store/DataStore |
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| 159 | // The data store from where to retrieve initial data for this model. |
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| 160 | // An optional query may also be provided along with this store. |
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| 161 | // Either data or store property must be provided. |
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| 162 | store: null, |
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| 163 | |
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| 164 | // valid: boolean |
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| 165 | // Whether this model deems the associated data to be valid. |
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| 166 | valid: true, |
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| 167 | |
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| 168 | // value: Object |
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| 169 | // The associated value (if this is a leaf node). The value of |
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| 170 | // intermediate nodes in the model is not defined. |
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| 171 | value: "", |
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| 172 | |
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| 173 | //////////////////////// PUBLIC METHODS / API //////////////////////// |
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| 174 | |
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| 175 | reset: function(){ |
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| 176 | // summary: |
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| 177 | // Resets this data model values to its original state. |
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| 178 | // Structural changes to the data model (such as adds or removes) |
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| 179 | // are not restored. |
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| 180 | if(lang.isObject(this.data) && !(this.data instanceof Date) && !(this.data instanceof RegExp)){ |
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| 181 | for(var x in this){ |
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| 182 | if(this[x] && lang.isFunction(this[x].reset)){ |
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| 183 | this[x].reset(); |
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| 184 | } |
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| 185 | } |
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| 186 | }else{ |
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| 187 | this.set("value", this.data); |
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| 188 | } |
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| 189 | }, |
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| 190 | |
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| 191 | commit: function(/*"dojo/store/DataStore?"*/ store){ |
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| 192 | // summary: |
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| 193 | // Commits this data model: |
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| 194 | // |
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| 195 | // - Saves the current state such that a subsequent reset will not |
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| 196 | // undo any prior changes. |
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| 197 | // - Persists client-side changes to the data store, if a store |
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| 198 | // has been supplied as a parameter or at instantiation. |
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| 199 | // store: |
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| 200 | // dojo/store/DataStore |
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| 201 | // Optional dojo/store/DataStore to use for this commit, if none |
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| 202 | // provided but one was provided at instantiation time, that store |
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| 203 | // will be used instead. |
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| 204 | this._commit(); |
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| 205 | var ds = store || this.store; |
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| 206 | if(ds){ |
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| 207 | this._saveToStore(ds); |
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| 208 | } |
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| 209 | }, |
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| 210 | |
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| 211 | toPlainObject: function(){ |
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| 212 | // summary: |
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| 213 | // Produces a plain JavaScript object representation of the data |
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| 214 | // currently within this data model. |
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| 215 | // returns: |
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| 216 | // Object |
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| 217 | // The plain JavaScript object representation of the data in this |
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| 218 | // model. |
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| 219 | return getPlainValue(this, StatefulModel.getPlainValueOptions); |
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| 220 | }, |
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| 221 | |
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| 222 | splice: function(/*Number*/ idx, /*Number*/ n){ |
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| 223 | // summary: |
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| 224 | // Removes and then adds some elements to this array. |
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| 225 | // Updates the removed/added elements, as well as the length, as stateful. |
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| 226 | // idx: Number |
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| 227 | // The index where removal/addition should be done. |
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| 228 | // n: Number |
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| 229 | // How many elements to be removed at idx. |
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| 230 | // varargs: Anything[] |
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| 231 | // The elements to be added to idx. |
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| 232 | // returns: dojox/mvc/StatefulArray |
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| 233 | // The removed elements. |
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| 234 | |
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| 235 | var a = (new StatefulArray([])).splice.apply(this, lang._toArray(arguments)); |
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| 236 | for(var i = 0; i < a.length; i++){ |
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| 237 | (this._removals = this._removals || []).push(a[i].toPlainObject()); |
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| 238 | } |
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| 239 | return a; |
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| 240 | }, |
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| 241 | |
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| 242 | add: function(/*String*/ name, /*dojo/Stateful*/ stateful){ |
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| 243 | // summary: |
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| 244 | // Adds a dojo/Stateful tree represented by the given |
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| 245 | // dojox/mvc/StatefulModel at the given property name. |
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| 246 | // name: |
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| 247 | // The property name to use whose value will become the given |
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| 248 | // dijit/Stateful tree. |
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| 249 | // stateful: |
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| 250 | // The dojox/mvc/StatefulModel to insert. |
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| 251 | // description: |
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| 252 | // In case of arrays, the property names are indices passed |
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| 253 | // as Strings. An addition of such a dojo/Stateful node |
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| 254 | // results in right-shifting any trailing sibling nodes. |
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| 255 | |
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| 256 | if(typeof this.get("length") === "number" && /^[0-9]+$/.test(name.toString())){ |
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| 257 | if(this.get("length") < (name - 0)){ |
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| 258 | throw new Error("Out of bounds insert attempted, must be contiguous."); |
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| 259 | } |
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| 260 | this.splice(name - 0, 0, stateful); |
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| 261 | }else{ |
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| 262 | this.set(name, stateful); |
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| 263 | } |
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| 264 | }, |
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| 265 | |
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| 266 | remove: function(/*String*/ name){ |
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| 267 | // summary: |
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| 268 | // Removes the dojo/Stateful tree at the given property name. |
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| 269 | // name: |
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| 270 | // The property name from where the tree will be removed. |
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| 271 | // description: |
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| 272 | // In case of arrays, the property names are indices passed |
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| 273 | // as Strings. A removal of such a dojo/Stateful node |
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| 274 | // results in left-shifting any trailing sibling nodes. |
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| 275 | if(typeof this.get("length") === "number" && /^[0-9]+$/.test(name.toString())){ |
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| 276 | if(!this.get(name)){ |
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| 277 | throw new Error("Out of bounds delete attempted - no such index: " + n); |
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| 278 | }else{ |
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| 279 | this.splice(name - 0, 1); |
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| 280 | } |
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| 281 | }else{ |
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| 282 | var elem = this.get(name); |
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| 283 | if(!elem){ |
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| 284 | throw new Error("Illegal delete attempted - no such property: " + name); |
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| 285 | }else{ |
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| 286 | this._removals = this._removals || []; |
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| 287 | this._removals.push(elem.toPlainObject()); |
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| 288 | this.set(name, undefined); |
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| 289 | delete this[name]; |
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| 290 | } |
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| 291 | } |
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| 292 | }, |
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| 293 | |
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| 294 | valueOf: function(){ |
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| 295 | // summary: |
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| 296 | // Returns the value representation of the data currently within this data model. |
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| 297 | // returns: |
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| 298 | // Object |
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| 299 | // The object representation of the data in this model. |
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| 300 | return this.toPlainObject(); |
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| 301 | }, |
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| 302 | |
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| 303 | toString: function(){ |
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| 304 | // summary: |
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| 305 | // Returns the string representation of the data currently within this data model. |
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| 306 | // returns: |
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| 307 | // String |
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| 308 | // The object representation of the data in this model. |
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| 309 | return this.value === "" && this.data ? this.data.toString() : this.value.toString(); |
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| 310 | }, |
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| 311 | |
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| 312 | //////////////////////// PRIVATE INITIALIZATION METHOD //////////////////////// |
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| 313 | |
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| 314 | constructor: function(/*Object*/ args){ |
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| 315 | // summary: |
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| 316 | // Instantiates a new data model that view components may bind to. |
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| 317 | // This is a private constructor, use the factory method |
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| 318 | // instead: dojox/mvc/newStatefulModel(args) |
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| 319 | // args: |
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| 320 | // The mixin properties. |
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| 321 | // description: |
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| 322 | // Creates a tree of dojo/Stateful objects matching the initial |
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| 323 | // data structure passed as input. The mixin property "data" is |
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| 324 | // used to provide a plain JavaScript object directly representing |
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| 325 | // the data structure. |
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| 326 | // tags: |
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| 327 | // private |
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| 328 | var data = (args && "data" in args) ? args.data : this.data; |
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| 329 | this._createModel(data); |
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| 330 | }, |
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| 331 | |
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| 332 | //////////////////////// PRIVATE METHODS //////////////////////// |
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| 333 | |
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| 334 | _createModel: function(/*Object*/ data){ |
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| 335 | // summary: |
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| 336 | // Create this data model from provided input data. |
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| 337 | // obj: |
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| 338 | // The input for the model, as a plain JavaScript object. |
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| 339 | // tags: |
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| 340 | // private |
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| 341 | |
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| 342 | if(data != null){ |
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| 343 | data = getStateful(data, StatefulModel.getStatefulOptions); |
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| 344 | if(lang.isArray(data)){ |
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| 345 | // Some consumers of dojox/mvc/StatefulModel inherits it via dojo/declare(), where we cannot use array inheritance technique |
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| 346 | // (dojo/declare() does not support return value in constructor) |
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| 347 | this.length = 0; |
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| 348 | [].splice.apply(this, data); |
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| 349 | }else if(lang.isObject(data)){ |
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| 350 | for(var s in data){ |
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| 351 | if(data.hasOwnProperty(s)){ |
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| 352 | this[s] = data[s]; |
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| 353 | } |
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| 354 | } |
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| 355 | }else{ |
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| 356 | this.set("value", data); |
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| 357 | } |
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| 358 | } |
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| 359 | }, |
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| 360 | |
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| 361 | _commit: function(){ |
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| 362 | // summary: |
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| 363 | // Commits this data model, saves the current state into data to become the saved state, |
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| 364 | // so a reset will not undo any prior changes. |
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| 365 | // tags: |
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| 366 | // private |
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| 367 | for(var x in this){ |
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| 368 | if(this[x] && lang.isFunction(this[x]._commit)){ |
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| 369 | this[x]._commit(); |
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| 370 | } |
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| 371 | } |
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| 372 | this.data = this.toPlainObject(); |
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| 373 | }, |
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| 374 | |
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| 375 | _saveToStore: function(/*"dojo/store/DataStore"*/ store){ |
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| 376 | // summary: |
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| 377 | // Commit the current values to the data store: |
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| 378 | // |
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| 379 | // - remove() any deleted entries |
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| 380 | // - put() any new or updated entries |
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| 381 | // store: |
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| 382 | // dojo/store/DataStore to use for this commit. |
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| 383 | // tags: |
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| 384 | // private |
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| 385 | if(this._removals){ |
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| 386 | array.forEach(this._removals, function(d){ |
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| 387 | store.remove(store.getIdentity(d)); |
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| 388 | }, this); |
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| 389 | delete this._removals; |
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| 390 | } |
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| 391 | var dataToCommit = this.toPlainObject(); |
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| 392 | if(lang.isArray(dataToCommit)){ |
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| 393 | array.forEach(dataToCommit, function(d){ |
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| 394 | store.put(d); |
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| 395 | }, this); |
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| 396 | }else{ |
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| 397 | store.put(dataToCommit); |
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| 398 | } |
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| 399 | } |
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| 400 | }); |
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| 401 | |
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| 402 | lang.mixin(StatefulModel, { |
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| 403 | getStatefulOptions: { |
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| 404 | // summary: |
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| 405 | // An object that defines how model object should be created from plain object hierarchy. |
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| 406 | |
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| 407 | getType: function(/*Anything*/ v){ |
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| 408 | // summary: |
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| 409 | // Returns the type of the given value. |
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| 410 | // v: Anything |
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| 411 | // The value. |
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| 412 | |
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| 413 | return lang.isArray(v) ? "array" : v != null && {}.toString.call(v) == "[object Object]" ? "object" : "value"; // String |
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| 414 | }, |
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| 415 | |
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| 416 | getStatefulArray: function(/*Anything[]*/ a){ |
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| 417 | // summary: |
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| 418 | // Create a stateful array from a plain array. |
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| 419 | // a: Anything[] |
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| 420 | // The plain array. |
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| 421 | |
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| 422 | var _self = this, statefularray = lang.mixin(new StatefulArray(array.map(a, function(item){ return getStateful(item, _self); }))); |
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| 423 | for(var s in StatefulModel.prototype){ |
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| 424 | if(s != "set"){ statefularray[s] = StatefulModel.prototype[s]; } |
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| 425 | } |
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| 426 | statefularray.data = a; |
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| 427 | return statefularray; |
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| 428 | }, |
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| 429 | |
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| 430 | getStatefulObject: function(/*Object*/ o){ |
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| 431 | // summary: |
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| 432 | // Create a stateful object from a plain object. |
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| 433 | // o: Object |
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| 434 | // The plain object. |
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| 435 | |
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| 436 | var object = new StatefulModel(); |
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| 437 | object.data = o; |
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| 438 | for(var s in o){ |
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| 439 | object.set(s, getStateful(o[s], this)); |
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| 440 | } |
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| 441 | return object; // dojox/mvc/StatefulModel |
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| 442 | }, |
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| 443 | |
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| 444 | getStatefulValue: function(/*Anything*/ v){ |
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| 445 | // summary: |
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| 446 | // Create a stateful value from a plain value. |
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| 447 | // v: Anything |
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| 448 | // The plain value. |
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| 449 | |
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| 450 | var value = new StatefulModel(); |
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| 451 | value.data = v; |
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| 452 | value.set("value", v); |
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| 453 | return value; |
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| 454 | } |
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| 455 | }, |
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| 456 | |
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| 457 | getPlainValueOptions: { |
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| 458 | // summary: |
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| 459 | // An object that defines how plain value should be created from model object. |
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| 460 | |
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| 461 | getType: function(/*Anything*/ v){ |
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| 462 | // summary: |
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| 463 | // Returns the type of the given value. |
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| 464 | // v: Anything |
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| 465 | // The value. |
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| 466 | |
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| 467 | if(lang.isArray(v)){ return "array"; } |
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| 468 | if(lang.isObject(v)){ // Primitive values may have their own properties |
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| 469 | for(var s in v){ |
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| 470 | if(v.hasOwnProperty(s) && s != "value" && (v[s] || {}).get && (v[s] || {}).watch){ |
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| 471 | return "object"; |
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| 472 | } |
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| 473 | } |
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| 474 | } |
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| 475 | return "value"; |
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| 476 | }, |
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| 477 | |
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| 478 | getPlainArray: function(/*dojox/mvc/StatefulArray*/ a){ |
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| 479 | return array.map(a, function(item){ return getPlainValue(item, this); }, this); |
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| 480 | }, |
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| 481 | |
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| 482 | getPlainObject: function(/*dojox/mvc/StatefulModel*/ o){ |
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| 483 | var plain = {}; |
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| 484 | for(var s in o){ |
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| 485 | if(s == "_watchCallbacks" || (s in StatefulModel.prototype)){ continue; } |
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| 486 | plain[s] = getPlainValue(o[s], this); |
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| 487 | } |
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| 488 | return plain; |
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| 489 | }, |
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| 490 | |
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| 491 | getPlainValue: function(/*Anything*/ v){ |
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| 492 | return (v || {}).set && (v || {}).watch ? getPlainValue(v.value, this) : v; |
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| 493 | } |
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| 494 | } |
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| 495 | }); |
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| 496 | |
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| 497 | return StatefulModel; |
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| 498 | }); |
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