65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
/**
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* Copyright (c) 2006-2015, JGraph Ltd
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* Copyright (c) 2006-2015, Gaudenz Alder
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*/
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/**
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* Class: mxGenericChangeCodec
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*
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* Codec for <mxValueChange>s, <mxStyleChange>s, <mxGeometryChange>s,
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* <mxCollapseChange>s and <mxVisibleChange>s. This class is created
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* and registered dynamically at load time and used implicitly
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* via <mxCodec> and the <mxCodecRegistry>.
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*
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* Transient Fields:
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*
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* - model
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* - previous
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*
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* Reference Fields:
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*
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* - cell
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*
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* Constructor: mxGenericChangeCodec
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*
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* Factory function that creates a <mxObjectCodec> for
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* the specified change and fieldname.
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*
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* Parameters:
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*
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* obj - An instance of the change object.
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* variable - The fieldname for the change data.
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*/
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var mxGenericChangeCodec = function(obj, variable)
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{
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var codec = new mxObjectCodec(obj, ['model', 'previous'], ['cell']);
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/**
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* Function: afterDecode
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*
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* Restores the state by assigning the previous value.
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*/
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codec.afterDecode = function(dec, node, obj)
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{
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// Allows forward references in sessions. This is a workaround
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// for the sequence of edits in mxGraph.moveCells and cellsAdded.
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if (mxUtils.isNode(obj.cell))
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{
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obj.cell = dec.decodeCell(obj.cell, false);
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}
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obj.previous = obj[variable];
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return obj;
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};
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return codec;
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};
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// Registers the codecs
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mxCodecRegistry.register(mxGenericChangeCodec(new mxValueChange(), 'value'));
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mxCodecRegistry.register(mxGenericChangeCodec(new mxStyleChange(), 'style'));
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mxCodecRegistry.register(mxGenericChangeCodec(new mxGeometryChange(), 'geometry'));
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mxCodecRegistry.register(mxGenericChangeCodec(new mxCollapseChange(), 'collapsed'));
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mxCodecRegistry.register(mxGenericChangeCodec(new mxVisibleChange(), 'visible'));
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mxCodecRegistry.register(mxGenericChangeCodec(new mxCellAttributeChange(), 'value'));
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