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* VisualEditor UserInterface data transfer handler class.
*
* @copyright See AUTHORS.txt
*/
/**
* Data transfer handler.
*
* @class
* @abstract
*
* @constructor
* @param {ve.ui.Surface} surface
* @param {ve.ui.DataTransferItem} item Data transfer item to handle
*/
ve.ui.DataTransferHandler = function VeUiDataTransferHandler( surface, item ) {
// Properties
this.surface = surface;
this.item = item;
this.progress = false;
this.progressBar = null;
this.insertableDataDeferred = ve.createDeferred();
};
/* Inheritance */
OO.initClass( ve.ui.DataTransferHandler );
/* Static properties */
/**
* Symbolic name for this handler. Must be unique.
*
* @static
* @property {string}
* @inheritable
*/
ve.ui.DataTransferHandler.static.name = null;
/**
* List of transfer kinds supported by this handler
*
* Null means all kinds are supported.
*
* @static
* @property {string[]|null}
* @inheritable
*/
ve.ui.DataTransferHandler.static.kinds = null;
/**
* List of mime types supported by this handler
*
* @static
* @property {string[]}
* @inheritable
*/
ve.ui.DataTransferHandler.static.types = [];
/**
* Use handler when data transfer source is a paste
*
* @static
* @type {boolean}
* @inheritable
*/
ve.ui.DataTransferHandler.static.handlesPaste = true;
/**
* Use handler when data transfer source is a "paste special"
*
* @static
* @type {boolean}
* @inheritable
*/
ve.ui.DataTransferHandler.static.handlesPasteSpecial = false;
/**
* Custom match function which is given the data transfer item as its only argument
* and returns a boolean indicating if the handler matches
*
* Null means the handler always matches
*
* @static
* @type {Function}
* @inheritable
*/
ve.ui.DataTransferHandler.static.matchFunction = null;
/* Methods */
/**
* Process the file
*
* Implementations should aim to resolve this.insertableDataDeferred.
*
* @abstract
* @method
*/
ve.ui.DataTransferHandler.prototype.process = null;
/**
* Insert the file at a specified fragment
*
* @return {jQuery.Promise} Promise which resolves with data to insert
*/
ve.ui.DataTransferHandler.prototype.getInsertableData = function () {
this.process();
return this.insertableDataDeferred.promise();
};
/**
* Resolve the data transfer handler with some data
*
* @param {ve.dm.Document|string|Array} dataOrDoc Insertable data or document
*/
ve.ui.DataTransferHandler.prototype.resolve = function ( dataOrDoc ) {
this.insertableDataDeferred.resolve( dataOrDoc );
};
/**
* Abort the data transfer handler
*/
ve.ui.DataTransferHandler.prototype.abort = function () {
this.insertableDataDeferred.reject();
};
/**
* Create a progress bar with a specified label
*
* @param {jQuery.Promise} progressCompletePromise Promise which resolves when the progress action is complete
* @param {jQuery|string|Function} label Progress bar label
*/
ve.ui.DataTransferHandler.prototype.createProgress = function ( progressCompletePromise, label ) {
var handler = this;
this.surface.createProgress( progressCompletePromise, label ).done( function ( progressBar, cancelPromise ) {
// Set any progress that was achieved before this resolved
progressBar.setProgress( handler.progress );
handler.progressBar = progressBar;
cancelPromise.fail( handler.abort.bind( handler ) );
} );
};
/**
* Set progress bar progress
*
* Progress is stored in a property in case the progress bar doesn't exist yet.
*
* @param {number} progress Progress percent
*/
ve.ui.DataTransferHandler.prototype.setProgress = function ( progress ) {
this.progress = progress;
Iif ( this.progressBar ) {
this.progressBar.setProgress( this.progress );
}
};
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