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| import {
filter,
isNumber
} from 'min-dash';
var max = Math.max,
min = Math.min;
var DEFAULT_CHILD_BOX_PADDING = 20;
import {
getBBox
} from '../../util/Elements';
import {
asTRBL,
asBounds
} from '../../layout/LayoutUtil';
/**
* Substract a TRBL from another
*
* @param {TRBL} trblA
* @param {TRBL} trblB
*
* @return {TRBL}
*/
export function substractTRBL(trblA, trblB) {
return {
top: trblA.top - trblB.top,
right: trblA.right - trblB.right,
bottom: trblA.bottom - trblB.bottom,
left: trblA.left - trblB.left
};
}
/**
* Resize the given bounds by the specified delta from a given anchor point.
*
* @param {Bounds} bounds the bounding box that should be resized
* @param {String} direction in which the element is resized (nw, ne, se, sw)
* @param {Point} delta of the resize operation
*
* @return {Bounds} resized bounding box
*/
export function resizeBounds(bounds, direction, delta) {
var dx = delta.x,
dy = delta.y;
switch (direction) {
case 'nw':
return {
x: bounds.x + dx,
y: bounds.y + dy,
width: bounds.width - dx,
height: bounds.height - dy
};
case 'sw':
return {
x: bounds.x + dx,
y: bounds.y,
width: bounds.width - dx,
height: bounds.height + dy
};
case 'ne':
return {
x: bounds.x,
y: bounds.y + dy,
width: bounds.width + dx,
height: bounds.height - dy
};
case 'se':
return {
x: bounds.x,
y: bounds.y,
width: bounds.width + dx,
height: bounds.height + dy
};
default:
throw new Error('unrecognized direction: ' + direction);
}
}
/**
* Resize the given bounds by applying the passed
* { top, right, bottom, left } delta.
*
* @param {Bounds} bounds
* @param {TRBL} trblResize
*
* @return {Bounds}
*/
export function resizeTRBL(bounds, resize) {
return {
x: bounds.x + (resize.left || 0),
y: bounds.y + (resize.top || 0),
width: bounds.width - (resize.left || 0) + (resize.right || 0),
height: bounds.height - (resize.top || 0) + (resize.bottom || 0)
};
}
export function reattachPoint(bounds, newBounds, point) {
var sx = bounds.width / newBounds.width,
sy = bounds.height / newBounds.height;
return {
x: Math.round((newBounds.x + newBounds.width / 2)) - Math.floor(((bounds.x + bounds.width / 2) - point.x) / sx),
y: Math.round((newBounds.y + newBounds.height / 2)) - Math.floor(((bounds.y + bounds.height / 2) - point.y) / sy)
};
}
function applyConstraints(attr, trbl, resizeConstraints) {
var value = trbl[attr],
minValue = resizeConstraints.min && resizeConstraints.min[attr],
maxValue = resizeConstraints.max && resizeConstraints.max[attr];
if (isNumber(minValue)) {
value = (/top|left/.test(attr) ? min : max)(value, minValue);
}
if (isNumber(maxValue)) {
value = (/top|left/.test(attr) ? max : min)(value, maxValue);
}
return value;
}
export function ensureConstraints(currentBounds, resizeConstraints) {
Iif (!resizeConstraints) {
return currentBounds;
}
var currentTrbl = asTRBL(currentBounds);
return asBounds({
top: applyConstraints('top', currentTrbl, resizeConstraints),
right: applyConstraints('right', currentTrbl, resizeConstraints),
bottom: applyConstraints('bottom', currentTrbl, resizeConstraints),
left: applyConstraints('left', currentTrbl, resizeConstraints)
});
}
export function getMinResizeBounds(direction, currentBounds, minDimensions, childrenBounds) {
var currentBox = asTRBL(currentBounds);
var minBox = {
top: /n/.test(direction) ? currentBox.bottom - minDimensions.height : currentBox.top,
left: /w/.test(direction) ? currentBox.right - minDimensions.width : currentBox.left,
bottom: /s/.test(direction) ? currentBox.top + minDimensions.height : currentBox.bottom,
right: /e/.test(direction) ? currentBox.left + minDimensions.width : currentBox.right
};
var childrenBox = childrenBounds ? asTRBL(childrenBounds) : minBox;
var combinedBox = {
top: min(minBox.top, childrenBox.top),
left: min(minBox.left, childrenBox.left),
bottom: max(minBox.bottom, childrenBox.bottom),
right: max(minBox.right, childrenBox.right)
};
return asBounds(combinedBox);
}
function asPadding(mayBePadding, defaultValue) {
if (typeof mayBePadding !== 'undefined') {
return mayBePadding;
} else {
return DEFAULT_CHILD_BOX_PADDING;
}
}
export function addPadding(bbox, padding) {
var left, right, top, bottom;
if (typeof padding === 'object') {
left = asPadding(padding.left);
right = asPadding(padding.right);
top = asPadding(padding.top);
bottom = asPadding(padding.bottom);
} else {
left = right = top = bottom = asPadding(padding);
}
return {
x: bbox.x - left,
y: bbox.y - top,
width: bbox.width + left + right,
height: bbox.height + top + bottom
};
}
/**
* Is the given element part of the resize
* targets min boundary box?
*
* This is the default implementation which excludes
* connections and labels.
*
* @param {djs.model.Base} element
*/
function isBBoxChild(element) {
// exclude connections
if (element.waypoints) {
return false;
}
// exclude labels
Iif (element.type === 'label') {
return false;
}
return true;
}
/**
* Return children bounding computed from a shapes children
* or a list of prefiltered children.
*
* @param {djs.model.Shape|Array<djs.model.Shape>} shapeOrChildren
* @param {Number|Object} padding
*
* @return {Bounds}
*/
export function computeChildrenBBox(shapeOrChildren, padding) {
var elements;
// compute based on shape
Eif (shapeOrChildren.length === undefined) {
// grab all the children that are part of the
// parents children box
elements = filter(shapeOrChildren.children, isBBoxChild);
} else {
elements = shapeOrChildren;
}
if (elements.length) {
return addPadding(getBBox(elements), padding);
}
}
|