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import StockpackImagesModel from './stockpack-images-model'; |
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|
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const StockpackSelection = StockpackImagesModel.extend( { |
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/** |
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* Refresh the `single` model whenever the selection changes. |
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* Binds `single` instead of using the context argument to ensure |
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* it receives no parameters. |
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* |
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* @param {Array} [models=[]] Array of models used to populate the collection. |
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* @param {Object} [options={}] |
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*/ |
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initialize( models, options ) { |
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/** |
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* call 'initialize' directly on the parent class |
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*/ |
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StockpackImagesModel.prototype.initialize.apply( this, arguments ); |
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this.multiple = options && options.multiple; |
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|
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this.on( 'add remove reset', _.bind( this.single, this, false ) ); |
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}, |
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|
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/** |
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* If the workflow does not support multi-select, clear out the selection |
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* before adding a new attachment to it. |
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* |
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* @param {Array} models |
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* @param {Object} options |
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* @return {StockpackImagesModel[]} attachments |
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*/ |
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add( models, options ) { |
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if ( ! this.multiple ) { |
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this.remove( this.models ); |
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} |
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/** |
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* call 'add' directly on the parent class |
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*/ |
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return StockpackImagesModel.prototype.add.call( this, models, options ); |
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}, |
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|
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/** |
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* Fired when toggling (clicking on) an attachment in the modal. |
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* |
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* @param {undefined|boolean|StockpackImagesModel} model |
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* |
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* @return {Backbone.Model} model |
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*/ |
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single( model ) { |
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const previous = this._single; |
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|
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// If a `model` is provided, use it as the single model. |
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if ( model ) { |
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this._single = model; |
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} |
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// If the single model isn't in the selection, remove it. |
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if ( this._single && ! this.get( this._single.cid ) ) { |
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delete this._single; |
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} |
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|
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this._single = this._single || this.last(); |
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|
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// If single has changed, fire an event. |
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if ( this._single !== previous ) { |
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if ( previous ) { |
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previous.trigger( 'selection:unsingle', previous, this ); |
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|
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// If the model was already removed, trigger the collection |
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// event manually. |
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if ( ! this.get( previous.cid ) ) { |
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this.trigger( 'selection:unsingle', previous, this ); |
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} |
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} |
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if ( this._single ) { |
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this._single.trigger( 'selection:single', this._single, this ); |
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} |
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} |
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|
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// Return the single model, or the last model as a fallback. |
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return this._single; |
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}, |
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} ); |
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|
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export default StockpackSelection; |
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