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| /**
* The code in the <project-logo></project-logo> area
* must not be changed.
*
* @see http://bpmn.io/license for more information.
*/
'use strict';
var assign = require('lodash/object/assign'),
omit = require('lodash/object/omit'),
isNumber = require('lodash/lang/isNumber');
var domify = require('min-dom/lib/domify'),
domQuery = require('min-dom/lib/query'),
domRemove = require('min-dom/lib/remove');
var innerSVG = require('tiny-svg/lib/innerSVG');
var Diagram = require('diagram-js'),
BpmnModdle = require('bpmn-moddle');
var inherits = require('inherits');
var Importer = require('./import/Importer');
function checkValidationError(err) {
// check if we can help the user by indicating wrong BPMN 2.0 xml
// (in case he or the exporting tool did not get that right)
var pattern = /unparsable content <([^>]+)> detected([\s\S]*)$/;
var match = pattern.exec(err.message);
if (match) {
err.message =
'unparsable content <' + match[1] + '> detected; ' +
'this may indicate an invalid BPMN 2.0 diagram file' + match[2];
}
return err;
}
var DEFAULT_OPTIONS = {
width: '100%',
height: '100%',
position: 'relative'
};
/**
* Ensure the passed argument is a proper unit (defaulting to px)
*/
function ensureUnit(val) {
return val + (isNumber(val) ? 'px' : '');
}
/**
* A viewer for BPMN 2.0 diagrams.
*
* Have a look at {@link NavigatedViewer} or {@link Modeler} for bundles that include
* additional features.
*
*
* ## Extending the Viewer
*
* In order to extend the viewer pass extension modules to bootstrap via the
* `additionalModules` option. An extension module is an object that exposes
* named services.
*
* The following example depicts the integration of a simple
* logging component that integrates with interaction events:
*
*
* ```javascript
*
* // logging component
* function InteractionLogger(eventBus) {
* eventBus.on('element.hover', function(event) {
* console.log()
* })
* }
*
* InteractionLogger.$inject = [ 'eventBus' ]; // minification save
*
* // extension module
* var extensionModule = {
* __init__: [ 'interactionLogger' ],
* interactionLogger: [ 'type', InteractionLogger ]
* };
*
* // extend the viewer
* var bpmnViewer = new Viewer({ additionalModules: [ extensionModule ] });
* bpmnViewer.importXML(...);
* ```
*
* @param {Object} [options] configuration options to pass to the viewer
* @param {DOMElement} [options.container] the container to render the viewer in, defaults to body.
* @param {String|Number} [options.width] the width of the viewer
* @param {String|Number} [options.height] the height of the viewer
* @param {Object} [options.moddleExtensions] extension packages to provide
* @param {Array<didi.Module>} [options.modules] a list of modules to override the default modules
* @param {Array<didi.Module>} [options.additionalModules] a list of modules to use with the default modules
*/
function Viewer(options) {
options = assign({}, DEFAULT_OPTIONS, options);
this.moddle = this._createModdle(options);
this.container = this._createContainer(options);
/* <project-logo> */
addProjectLogo(this.container);
/* </project-logo> */
this._init(this.container, this.moddle, options);
}
inherits(Viewer, Diagram);
module.exports = Viewer;
/**
* Parse and render a BPMN 2.0 diagram.
*
* Once finished the viewer reports back the result to the
* provided callback function with (err, warnings).
*
* ## Life-Cycle Events
*
* During import the viewer will fire life-cycle events:
*
* * import.parse.start (about to read model from xml)
* * import.parse.complete (model read; may have worked or not)
* * import.render.start (graphical import start)
* * import.render.complete (graphical import finished)
* * import.done (everything done)
*
* You can use these events to hook into the life-cycle.
*
* @param {String} xml the BPMN 2.0 xml
* @param {Function} [done] invoked with (err, warnings=[])
*/
Viewer.prototype.importXML = function(xml, done) {
// done is optional
done = done || function() {};
var self = this;
// hook in pre-parse listeners +
// allow xml manipulation
xml = this._emit('import.parse.start', { xml: xml }) || xml;
this.moddle.fromXML(xml, 'bpmn:Definitions', function(err, definitions, context) {
// hook in post parse listeners +
// allow definitions manipulation
definitions = self._emit('import.parse.complete', {
error: err,
definitions: definitions,
context: context
}) || definitions;
if (err) {
err = checkValidationError(err);
self._emit('import.done', { error: err });
return done(err);
}
var parseWarnings = context.warnings;
self.importDefinitions(definitions, function(err, importWarnings) {
var allWarnings = [].concat(parseWarnings, importWarnings || []);
self._emit('import.done', { error: err, warnings: allWarnings });
done(err, allWarnings);
});
});
};
/**
* Export the currently displayed BPMN 2.0 diagram as
* a BPMN 2.0 XML document.
*
* @param {Object} [options] export options
* @param {Boolean} [options.format=false] output formated XML
* @param {Boolean} [options.preamble=true] output preamble
*
* @param {Function} done invoked with (err, xml)
*/
Viewer.prototype.saveXML = function(options, done) {
if (!done) {
done = options;
options = {};
}
var definitions = this.definitions;
if (!definitions) {
return done(new Error('no definitions loaded'));
}
this.moddle.toXML(definitions, options, done);
};
/**
* Export the currently displayed BPMN 2.0 diagram as
* an SVG image.
*
* @param {Object} [options]
* @param {Function} done invoked with (err, svgStr)
*/
Viewer.prototype.saveSVG = function(options, done) {
if (!done) {
done = options;
options = {};
}
var canvas = this.get('canvas');
var contentNode = canvas.getDefaultLayer(),
defsNode = domQuery('defs', canvas._svg);
var contents = innerSVG(contentNode),
defs = (defsNode && defsNode.outerHTML) || '';
var bbox = contentNode.getBBox();
var svg =
'<?xml version="1.0" encoding="utf-8"?>\n' +
'<!-- created with bpmn-js / http://bpmn.io -->\n' +
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n' +
'<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" ' +
'width="' + bbox.width + '" height="' + bbox.height + '" ' +
'viewBox="' + bbox.x + ' ' + bbox.y + ' ' + bbox.width + ' ' + bbox.height + '" version="1.1">' +
defs + contents +
'</svg>';
done(null, svg);
};
/**
* Get a named diagram service.
*
* @example
*
* var elementRegistry = viewer.get('elementRegistry');
* var startEventShape = elementRegistry.get('StartEvent_1');
*
* @param {String} name
*
* @return {Object} diagram service instance
*
* @method Viewer#get
*/
/**
* Invoke a function in the context of this viewer.
*
* @example
*
* viewer.invoke(function(elementRegistry) {
* var startEventShape = elementRegistry.get('StartEvent_1');
* });
*
* @param {Function} fn to be invoked
*
* @return {Object} the functions return value
*
* @method Viewer#invoke
*/
/**
* Remove all drawn elements from the viewer.
*
* After calling this method the viewer can still
* be reused for opening another diagram.
*
* @method Viewer#clear
*/
Viewer.prototype.importDefinitions = function(definitions, done) {
// use try/catch to not swallow synchronous exceptions
// that may be raised during model parsing
try {
if (this.definitions) {
// clear existing rendered diagram
this.clear();
}
// update definitions
this.definitions = definitions;
// perform graphical import
Importer.importBpmnDiagram(this, definitions, done);
} catch (e) {
// handle synchronous errors
done(e);
}
};
Viewer.prototype.getModules = function() {
return this._modules;
};
/**
* Destroy the viewer instance and remove all its
* remainders from the document tree.
*/
Viewer.prototype.destroy = function() {
// diagram destroy
Diagram.prototype.destroy.call(this);
// dom detach
domRemove(this.container);
};
/**
* Register an event listener
*
* Remove a previously added listener via {@link #off(event, callback)}.
*
* @param {String} event
* @param {Number} [priority]
* @param {Function} callback
* @param {Object} [that]
*/
Viewer.prototype.on = function(event, priority, callback, target) {
return this.get('eventBus').on(event, priority, callback, target);
};
/**
* De-register an event listener
*
* @param {String} event
* @param {Function} callback
*/
Viewer.prototype.off = function(event, callback) {
this.get('eventBus').off(event, callback);
};
Viewer.prototype.attachTo = function(parentNode) {
if (!parentNode) {
throw new Error('parentNode required');
}
// ensure we detach from the
// previous, old parent
this.detach();
// unwrap jQuery if provided
if (parentNode.get && parentNode.constructor.prototype.jquery) {
parentNode = parentNode.get(0);
}
if (typeof parentNode === 'string') {
parentNode = domQuery(parentNode);
}
var container = this._container;
parentNode.appendChild(container);
this._emit('attach', {});
};
Viewer.prototype.detach = function() {
var container = this._container,
parentNode = container.parentNode;
if (!parentNode) {
return;
}
this._emit('detach', {});
parentNode.removeChild(container);
};
Viewer.prototype._init = function(container, moddle, options) {
this._container = container;
var baseModules = options.modules || this.getModules(),
additionalModules = options.additionalModules || [],
staticModules = [
{
bpmnjs: [ 'value', this ],
moddle: [ 'value', moddle ]
}
];
var diagramModules = [].concat(staticModules, baseModules, additionalModules);
var diagramOptions = assign(omit(options, 'additionalModules'), {
canvas: assign({}, options.canvas, { container: container }),
modules: diagramModules
});
// invoke diagram constructor
Diagram.call(this, diagramOptions);
if (options && options.container) {
this.attachTo(options.container);
}
};
/**
* Emit an event on the underlying {@link EventBus}
*
* @param {String} type
* @param {Object} event
*
* @return {Object} event processing result (if any)
*/
Viewer.prototype._emit = function(type, event) {
return this.get('eventBus').fire(type, event);
};
Viewer.prototype._createContainer = function(options) {
var container = domify('<div class="bjs-container"></div>');
assign(container.style, {
width: ensureUnit(options.width),
height: ensureUnit(options.height),
position: options.position
});
return container;
};
Viewer.prototype._createModdle = function(options) {
var moddleOptions = assign({}, this._moddleExtensions, options.moddleExtensions);
return new BpmnModdle(moddleOptions);
};
// modules the viewer is composed of
Viewer.prototype._modules = [
require('./core'),
require('diagram-js/lib/i18n/translate'),
require('diagram-js/lib/features/selection'),
require('diagram-js/lib/features/overlays')
];
// default moddle extensions the viewer is composed of
Viewer.prototype._moddleExtensions = {};
/* <project-logo> */
var PoweredBy = require('./util/PoweredByUtil'),
domEvent = require('min-dom/lib/event');
/**
* Adds the project logo to the diagram container as
* required by the bpmn.io license.
*
* @see http://bpmn.io/license
*
* @param {Element} container
*/
function addProjectLogo(container) {
var logoData = PoweredBy.BPMNIO_LOGO;
var linkMarkup =
'<a href="http://bpmn.io" ' +
'target="_blank" ' +
'class="bjs-powered-by" ' +
'title="Powered by bpmn.io" ' +
'style="position: absolute; bottom: 15px; right: 15px; z-index: 100">' +
'<img src="data:image/png;base64,' + logoData + '">' +
'</a>';
var linkElement = domify(linkMarkup);
container.appendChild(linkElement);
domEvent.bind(linkElement, 'click', function(event) {
PoweredBy.open();
event.preventDefault();
});
}
/* </project-logo> */
|