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| import {
forEach
} from 'min-dash';
import {
delegate as domDelegate,
query as domQuery
} from 'min-dom';
import { isPrimaryButton } from '../../util/Mouse';
import {
append as svgAppend,
attr as svgAttr,
create as svgCreate
} from 'tiny-svg';
import {
createLine,
updateLine
} from '../../util/RenderUtil';
function allowAll(e) { return true; }
var LOW_PRIORITY = 500;
/**
* A plugin that provides interaction events for diagram elements.
*
* It emits the following events:
*
* * element.hover
* * element.out
* * element.click
* * element.dblclick
* * element.mousedown
* * element.contextmenu
*
* Each event is a tuple { element, gfx, originalEvent }.
*
* Canceling the event via Event#preventDefault()
* prevents the original DOM operation.
*
* @param {EventBus} eventBus
*/
export default function InteractionEvents(eventBus, elementRegistry, styles) {
var HIT_STYLE = styles.cls('djs-hit', [ 'no-fill', 'no-border' ], {
stroke: 'white',
strokeWidth: 15
});
/**
* Fire an interaction event.
*
* @param {String} type local event name, e.g. element.click.
* @param {DOMEvent} event native event
* @param {djs.model.Base} [element] the diagram element to emit the event on;
* defaults to the event target
*/
function fire(type, event, element) {
if (isIgnored(type, event)) {
return;
}
var target, gfx, returnValue;
if (!element) {
target = event.delegateTarget || event.target;
Eif (target) {
gfx = target;
element = elementRegistry.get(gfx);
}
} else {
gfx = elementRegistry.getGraphics(element);
}
Iif (!gfx || !element) {
return;
}
returnValue = eventBus.fire(type, {
element: element,
gfx: gfx,
originalEvent: event
});
Iif (returnValue === false) {
event.stopPropagation();
event.preventDefault();
}
}
// TODO(nikku): document this
var handlers = {};
function mouseHandler(localEventName) {
return handlers[localEventName];
}
function isIgnored(localEventName, event) {
var filter = ignoredFilters[localEventName] || isPrimaryButton;
// only react on left mouse button interactions
// except for interaction events that are enabled
// for secundary mouse button
return !filter(event);
}
var bindings = {
mouseover: 'element.hover',
mouseout: 'element.out',
click: 'element.click',
dblclick: 'element.dblclick',
mousedown: 'element.mousedown',
mouseup: 'element.mouseup',
contextmenu: 'element.contextmenu'
};
var ignoredFilters = {
'element.contextmenu': allowAll
};
// manual event trigger
/**
* Trigger an interaction event (based on a native dom event)
* on the target shape or connection.
*
* @param {String} eventName the name of the triggered DOM event
* @param {MouseEvent} event
* @param {djs.model.Base} targetElement
*/
function triggerMouseEvent(eventName, event, targetElement) {
// i.e. element.mousedown...
var localEventName = bindings[eventName];
Iif (!localEventName) {
throw new Error('unmapped DOM event name <' + eventName + '>');
}
return fire(localEventName, event, targetElement);
}
var elementSelector = 'svg, .djs-element';
// event registration
function registerEvent(node, event, localEvent, ignoredFilter) {
var handler = handlers[localEvent] = function(event) {
fire(localEvent, event);
};
Iif (ignoredFilter) {
ignoredFilters[localEvent] = ignoredFilter;
}
handler.$delegate = domDelegate.bind(node, elementSelector, event, handler);
}
function unregisterEvent(node, event, localEvent) {
var handler = mouseHandler(localEvent);
Iif (!handler) {
return;
}
domDelegate.unbind(node, event, handler.$delegate);
}
function registerEvents(svg) {
forEach(bindings, function(val, key) {
registerEvent(svg, key, val);
});
}
function unregisterEvents(svg) {
forEach(bindings, function(val, key) {
unregisterEvent(svg, key, val);
});
}
eventBus.on('canvas.destroy', function(event) {
unregisterEvents(event.svg);
});
eventBus.on('canvas.init', function(event) {
registerEvents(event.svg);
});
eventBus.on([ 'shape.added', 'connection.added' ], function(event) {
var element = event.element,
gfx = event.gfx,
hit;
if (element.waypoints) {
hit = createLine(element.waypoints);
} else {
hit = svgCreate('rect');
svgAttr(hit, {
x: 0,
y: 0,
width: element.width,
height: element.height
});
}
svgAttr(hit, HIT_STYLE);
svgAppend(gfx, hit);
});
// Update djs-hit on change.
// A low priortity is necessary, because djs-hit of labels has to be updated
// after the label bounds have been updated in the renderer.
eventBus.on('shape.changed', LOW_PRIORITY, function(event) {
var element = event.element,
gfx = event.gfx,
hit = domQuery('.djs-hit', gfx);
svgAttr(hit, {
width: element.width,
height: element.height
});
});
eventBus.on('connection.changed', function(event) {
var element = event.element,
gfx = event.gfx,
hit = domQuery('.djs-hit', gfx);
updateLine(hit, element.waypoints);
});
// API
this.fire = fire;
this.triggerMouseEvent = triggerMouseEvent;
this.mouseHandler = mouseHandler;
this.registerEvent = registerEvent;
this.unregisterEvent = unregisterEvent;
}
InteractionEvents.$inject = [
'eventBus',
'elementRegistry',
'styles'
];
/**
* An event indicating that the mouse hovered over an element
*
* @event element.hover
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the mouse has left an element
*
* @event element.out
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the mouse has clicked an element
*
* @event element.click
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the mouse has double clicked an element
*
* @event element.dblclick
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the mouse has gone down on an element.
*
* @event element.mousedown
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the mouse has gone up on an element.
*
* @event element.mouseup
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/
/**
* An event indicating that the context menu action is triggered
* via mouse or touch controls.
*
* @event element.contextmenu
*
* @type {Object}
* @property {djs.model.Base} element
* @property {SVGElement} gfx
* @property {Event} originalEvent
*/ |