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| import {
getDirection
} from './SpaceUtil';
import {
set as cursorSet
} from '../../util/Cursor';
import {
hasPrimaryModifier
} from '../../util/Mouse';
var abs = Math.abs,
round = Math.round;
var HIGH_PRIORITY = 1500,
SPACE_TOOL_CURSOR = 'crosshair';
var AXIS_TO_DIMENSION = { x: 'width', y: 'height' },
AXIS_INVERTED = { x: 'y', y: 'x' };
import {
selfAndAllChildren as getAllChildren
} from '../../util/Elements';
import {
assign,
forEach
} from 'min-dash';
/**
* A tool that allows users to create and remove space in a diagram.
*
* The tool needs to be activated manually via {@link SpaceTool#activate(MouseEvent)}.
*/
export default function SpaceTool(
eventBus, dragging, canvas,
modeling, rules, toolManager) {
this._canvas = canvas;
this._dragging = dragging;
this._modeling = modeling;
this._rules = rules;
this._toolManager = toolManager;
var self = this;
toolManager.registerTool('space', {
tool: 'spaceTool.selection',
dragging: 'spaceTool'
});
eventBus.on('spaceTool.selection.end', function(event) {
var target = event.originalEvent.target;
// only reactive on diagram click
// on some occasions, event.hover is not set and we have to check if the target is an svg
Iif (!event.hover && !(target instanceof SVGElement)) {
return;
}
eventBus.once('spaceTool.selection.ended', function() {
self.activateMakeSpace(event.originalEvent);
});
});
eventBus.on('spaceTool.move', HIGH_PRIORITY , function(event) {
var context = event.context;
Eif (!context.initialized) {
context.initialized = self.initializeMakeSpace(event, context);
}
});
eventBus.on('spaceTool.end', function(event) {
var context = event.context,
axis = context.axis,
direction = context.direction,
movingShapes = context.movingShapes,
resizingShapes = context.resizingShapes;
// skip if create space has not been initialized yet
Iif (!context.initialized) {
return;
}
var delta = { x: round(event.dx), y: round(event.dy) };
delta[ AXIS_INVERTED[ axis ] ] = 0;
var insideBounds = true;
// check if the space tool cursor is inside of bounds of
// any of the shapes that would be resized.
forEach(resizingShapes, function(shape) {
if ((direction === 'w' && event.x > shape.x + shape.width) ||
(direction === 'e' && event.x < shape.x) ||
(direction === 'n' && event.y > shape.y + shape.height) ||
(direction === 's' && event.y < shape.y)) {
insideBounds = false;
return;
}
});
if (insideBounds) {
// make space only if the cursor is inside bounds
self.makeSpace(movingShapes, resizingShapes, delta, direction);
}
eventBus.once('spaceTool.ended', function(event) {
// reactivate space tool after usage
self.activateSelection(event.originalEvent, true, true);
});
});
}
SpaceTool.$inject = [
'eventBus',
'dragging',
'canvas',
'modeling',
'rules',
'toolManager'
];
/**
* Activate space tool selection
*
* @param {MouseEvent} event
* @param {Boolean} autoActivate
*/
SpaceTool.prototype.activateSelection = function(event, autoActivate, reactivate) {
this._dragging.init(event, 'spaceTool.selection', {
trapClick: false,
cursor: SPACE_TOOL_CURSOR,
autoActivate: autoActivate,
data: {
context: {
reactivate: reactivate
}
}
});
};
/**
* Activate make space
*
* @param {MouseEvent} event
*/
SpaceTool.prototype.activateMakeSpace = function(event) {
this._dragging.init(event, 'spaceTool', {
autoActivate: true,
cursor: SPACE_TOOL_CURSOR,
data: {
context: {}
}
});
};
/**
* Actually make space on the diagram
*
* @param {Array<djs.model.Shape>} movingShapes
* @param {Array<djs.model.Shape>} resizingShapes
* @param {Point} delta
* @param {String} direction
*/
SpaceTool.prototype.makeSpace = function(movingShapes, resizingShapes, delta, direction) {
return this._modeling.createSpace(movingShapes, resizingShapes, delta, direction);
};
/**
* Initialize make space and return true if that was successful.
*
* @param {Event} event
* @param {Object} context
*
* @return {Boolean} true, if successful
*/
SpaceTool.prototype.initializeMakeSpace = function(event, context) {
var axis = abs(event.dx) > abs(event.dy) ? 'x' : 'y',
offset = event['d' + axis],
// start point of create space operation
spacePos = event[axis] - offset;
if (abs(offset) < 5) {
return false;
}
// invert the offset in order to remove space when moving left
if (offset < 0) {
offset *= -1;
}
// inverts the offset to choose the shapes
// on the opposite side of the resizer if
// a key modifier is pressed
if (hasPrimaryModifier(event)) {
offset *= -1;
}
var rootShape = this._canvas.getRootElement();
var allShapes = getAllChildren(rootShape, true);
var adjustments = this.calculateAdjustments(allShapes, axis, offset, spacePos);
// store data in context
assign(context, adjustments, {
axis: axis,
direction: getDirection(axis, offset)
});
cursorSet('resize-' + (axis === 'x' ? 'ew' : 'ns'));
return true;
};
/**
* Calculate adjustments needed when making space
*
* @param {Array<djs.model.Shape>} elements
* @param {String} axis
* @param {Number} offset
* @param {Number} spacePos
*
* @return {Object}
*/
SpaceTool.prototype.calculateAdjustments = function(elements, axis, offset, spacePos) {
var movingShapes = [],
resizingShapes = [];
var rules = this._rules;
// collect all elements that need to be moved _AND_
// resized given on the initial create space position
elements.forEach(function(shape) {
var shapeStart = shape[axis],
shapeEnd = shapeStart + shape[AXIS_TO_DIMENSION[axis]];
// checking if it's root
if (!shape.parent) {
return;
}
// checking if it's a shape
if (shape.waypoints) {
return;
}
// shape after spacePos
if (offset > 0 && shapeStart > spacePos) {
return movingShapes.push(shape);
}
// shape before spacePos
if (offset < 0 && shapeEnd < spacePos) {
return movingShapes.push(shape);
}
// shape on top of spacePos, resize only if allowed
if (shapeStart < spacePos &&
shapeEnd > spacePos &&
rules.allowed('shape.resize', { shape: shape })) {
return resizingShapes.push(shape);
}
});
return {
movingShapes: movingShapes,
resizingShapes: resizingShapes
};
};
SpaceTool.prototype.toggle = function() {
if (this.isActive()) {
this._dragging.cancel();
} else {
this.activateSelection();
}
};
SpaceTool.prototype.isActive = function() {
var context = this._dragging.context();
return context && /^spaceTool/.test(context.prefix);
};
|