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svg.js
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svg.js
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import { Commands } from '../utils/path-commands.js';
import { decomposeMatrix, mod, toFixed } from '../utils/math.js';
import { Events } from '../events.js';
import { _ } from '../utils/underscore.js';
import { Group } from '../group.js';
import { Vector } from '../vector.js';
const svg = {
version: 1.1,
ns: 'http://www.w3.org/2000/svg',
xlink: 'http://www.w3.org/1999/xlink',
alignments: {
left: 'start',
center: 'middle',
right: 'end',
},
baselines: {
top: 'hanging',
middle: 'middle',
bottom: 'ideographic',
baseline: 'alphabetic',
},
// Create an svg namespaced element.
createElement: function (name, attrs) {
const tag = name;
const elem = document.createElementNS(svg.ns, tag);
if (tag === 'svg') {
attrs = _.defaults(attrs || {}, {
version: svg.version,
});
}
if (attrs && Object.keys(attrs).length > 0) {
svg.setAttributes(elem, attrs);
}
return elem;
},
// Add attributes from an svg element.
setAttributes: function (elem, attrs) {
const keys = Object.keys(attrs);
for (let i = 0; i < keys.length; i++) {
if (/href/.test(keys[i])) {
elem.setAttributeNS(svg.xlink, keys[i], attrs[keys[i]]);
} else {
elem.setAttribute(keys[i], attrs[keys[i]]);
}
}
return this;
},
// Remove attributes from an svg element.
removeAttributes: function (elem, attrs) {
for (let key in attrs) {
elem.removeAttribute(key);
}
return this;
},
// Turn a set of vertices into a string for the d property of a path
// element. It is imperative that the string collation is as fast as
// possible, because this call will be happening multiple times a
// second.
toString: function (points, closed) {
let l = points.length,
last = l - 1,
d, // The elusive last Commands.move point
string = '';
for (let i = 0; i < l; i++) {
const b = points[i];
const prev = closed ? mod(i - 1, l) : Math.max(i - 1, 0);
const a = points[prev];
let command, c;
let vx, vy, ux, uy, ar, bl, br, cl;
let rx, ry, xAxisRotation, largeArcFlag, sweepFlag;
// Access x and y directly,
// bypassing the getter
let x = toFixed(b.x);
let y = toFixed(b.y);
switch (b.command) {
case Commands.close:
command = Commands.close;
break;
case Commands.arc:
rx = b.rx;
ry = b.ry;
xAxisRotation = b.xAxisRotation;
largeArcFlag = b.largeArcFlag;
sweepFlag = b.sweepFlag;
command =
Commands.arc +
' ' +
rx +
' ' +
ry +
' ' +
xAxisRotation +
' ' +
largeArcFlag +
' ' +
sweepFlag +
' ' +
x +
' ' +
y;
break;
case Commands.curve:
ar = (a.controls && a.controls.right) || Vector.zero;
bl = (b.controls && b.controls.left) || Vector.zero;
if (a.relative) {
vx = toFixed(ar.x + a.x);
vy = toFixed(ar.y + a.y);
} else {
vx = toFixed(ar.x);
vy = toFixed(ar.y);
}
if (b.relative) {
ux = toFixed(bl.x + b.x);
uy = toFixed(bl.y + b.y);
} else {
ux = toFixed(bl.x);
uy = toFixed(bl.y);
}
command =
(i === 0 ? Commands.move : Commands.curve) +
' ' +
vx +
' ' +
vy +
' ' +
ux +
' ' +
uy +
' ' +
x +
' ' +
y;
break;
case Commands.move:
d = b;
command = Commands.move + ' ' + x + ' ' + y;
break;
default:
command = b.command + ' ' + x + ' ' + y;
}
// Add a final point and close it off
if (i >= last && closed) {
if (b.command === Commands.curve) {
// Make sure we close to the most previous Commands.move
c = d;
br = (b.controls && b.controls.right) || b;
cl = (c.controls && c.controls.left) || c;
if (b.relative) {
vx = toFixed(br.x + b.x);
vy = toFixed(br.y + b.y);
} else {
vx = toFixed(br.x);
vy = toFixed(br.y);
}
if (c.relative) {
ux = toFixed(cl.x + c.x);
uy = toFixed(cl.y + c.y);
} else {
ux = toFixed(cl.x);
uy = toFixed(cl.y);
}
x = toFixed(c.x);
y = toFixed(c.y);
command +=
' C ' + vx + ' ' + vy + ' ' + ux + ' ' + uy + ' ' + x + ' ' + y;
}
if (b.command !== Commands.close) {
command += ' Z';
}
}
string += command + ' ';
}
return string;
},
pointsToString: function (points, size) {
let string = '';
const r = size * 0.5;
for (let i = 0; i < points.length; i++) {
const x = points[i].x;
const y = points[i].y - r;
string += Commands.move + ' ' + x + ' ' + y + ' ';
string += 'a ' + r + ' ' + r + ' 0 1 0 0.001 0 Z';
}
return string;
},
getClip: function (shape, domElement) {
let clip = shape._renderer.clip;
if (!clip) {
clip = shape._renderer.clip = svg.createElement('clipPath', {
'clip-rule': 'nonzero',
});
}
if (clip.parentNode === null) {
domElement.defs.appendChild(clip);
}
return clip;
},
defs: {
update: function (domElement) {
const { defs } = domElement;
if (defs._flagUpdate) {
const children = Array.prototype.slice.call(defs.children, 0);
for (let i = 0; i < children.length; i++) {
const child = children[i];
const id = child.id;
const selector = `[fill="url(#${id})"],[stroke="url(#${id})"],[clip-path="url(#${id})"]`;
const exists = domElement.querySelector(selector);
if (!exists) {
defs.removeChild(child);
}
}
defs._flagUpdate = false;
}
},
},
group: {
// TODO: Can speed up.
// TODO: How does this effect a f
appendChild: function (object) {
const elem = object._renderer.elem;
if (!elem) {
return;
}
const tag = elem.nodeName;
if (!tag || /(radial|linear)gradient/i.test(tag) || object._clip) {
return;
}
this.elem.appendChild(elem);
},
removeChild: function (object) {
const elem = object._renderer.elem;
if (!elem || elem.parentNode != this.elem) {
return;
}
const tag = elem.nodeName;
if (!tag) {
return;
}
// Defer subtractions while clipping.
if (object._clip) {
return;
}
this.elem.removeChild(elem);
},
orderChild: function (object) {
this.elem.appendChild(object._renderer.elem);
},
renderChild: function (child) {
svg[child._renderer.type].render.call(child, this);
},
render: function (domElement) {
// Shortcut for hidden objects.
// Doesn't reset the flags, so changes are stored and
// applied once the object is visible again
if (
(!this._visible && !this._flagVisible) ||
(this._opacity === 0 && !this._flagOpacity)
) {
return this;
}
this._update();
if (!this._renderer.elem) {
this._renderer.elem = svg.createElement('g', {
id: this.id,
});
domElement.appendChild(this._renderer.elem);
}
// _Update styles for the <g>
const flagMatrix = this._matrix.manual || this._flagMatrix;
const context = {
domElement: domElement,
elem: this._renderer.elem,
};
if (flagMatrix) {
this._renderer.elem.setAttribute(
'transform',
'matrix(' + this._matrix.toString() + ')'
);
}
for (let i = 0; i < this.children.length; i++) {
const child = this.children[i];
svg[child._renderer.type].render.call(child, domElement);
}
if (this._flagId) {
this._renderer.elem.setAttribute('id', this._id);
}
if (this._flagOpacity) {
this._renderer.elem.setAttribute('opacity', this._opacity);
}
if (this._flagVisible) {
this._renderer.elem.setAttribute(
'display',
this._visible ? 'inline' : 'none'
);
}
if (this._flagClassName) {
this._renderer.elem.setAttribute('class', this.classList.join(' '));
}
if (this._flagAdditions) {
this.additions.forEach(svg.group.appendChild, context);
}
if (this._flagSubtractions) {
this.subtractions.forEach(svg.group.removeChild, context);
}
if (this._flagOrder) {
this.children.forEach(svg.group.orderChild, context);
}
// Commented two-way functionality of clips / masks with groups and
// polygons. Uncomment when this bug is fixed:
// https://code.google.com/p/chromium/issues/detail?id=370951
// if (this._flagClip) {
// clip = svg.getClip(this, domElement);
// elem = this._renderer.elem;
// if (this._clip) {
// elem.removeAttribute('id');
// clip.setAttribute('id', this.id);
// clip.appendChild(elem);
// } else {
// clip.removeAttribute('id');
// elem.setAttribute('id', this.id);
// this.parent._renderer.elem.appendChild(elem); // TODO: should be insertBefore
// }
// }
if (this._flagMask) {
if (this._mask) {
svg[this._mask._renderer.type].render.call(this._mask, domElement);
this._renderer.elem.setAttribute(
'clip-path',
'url(#' + this._mask.id + ')'
);
} else {
this._renderer.elem.removeAttribute('clip-path');
}
}
if (this.dataset) {
Object.assign(this._renderer.elem.dataset, this.dataset);
}
return this.flagReset();
},
},
path: {
render: function (domElement) {
// Shortcut for hidden objects.
// Doesn't reset the flags, so changes are stored and
// applied once the object is visible again
if (this._opacity === 0 && !this._flagOpacity) {
return this;
}
this._update();
// Collect any attribute that needs to be changed here
const changed = {};
const flagMatrix = this._matrix.manual || this._flagMatrix;
if (flagMatrix) {
changed.transform = 'matrix(' + this._matrix.toString() + ')';
}
if (this._flagId) {
changed.id = this._id;
}
if (this._flagVertices) {
const vertices = svg.toString(this._renderer.vertices, this._closed);
changed.d = vertices;
}
if (this._fill && this._fill._renderer) {
this._renderer.hasFillEffect = true;
this._fill._update();
svg[this._fill._renderer.type].render.call(
this._fill,
domElement,
true
);
}
if (this._flagFill) {
changed.fill =
this._fill && this._fill.id
? 'url(#' + this._fill.id + ')'
: this._fill;
if (
this._renderer.hasFillEffect &&
typeof this._fill.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasFillEffect;
}
}
if (this._stroke && this._stroke._renderer) {
this._renderer.hasStrokeEffect = true;
this._stroke._update();
svg[this._stroke._renderer.type].render.call(
this._stroke,
domElement,
true
);
}
if (this._flagStroke) {
changed.stroke =
this._stroke && this._stroke.id
? 'url(#' + this._stroke.id + ')'
: this._stroke;
if (
this._renderer.hasStrokeEffect &&
typeof this._stroke.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasStrokeEffect;
}
}
if (this._flagLinewidth) {
changed['stroke-width'] = this._linewidth;
}
if (this._flagOpacity) {
changed['stroke-opacity'] = this._opacity;
changed['fill-opacity'] = this._opacity;
}
if (this._flagClassName) {
changed['class'] = this.classList.join(' ');
}
if (this._flagVisible) {
changed.visibility = this._visible ? 'visible' : 'hidden';
}
if (this._flagCap) {
changed['stroke-linecap'] = this._cap;
}
if (this._flagJoin) {
changed['stroke-linejoin'] = this._join;
}
if (this._flagMiter) {
changed['stroke-miterlimit'] = this._miter;
}
if (this.dashes && this.dashes.length > 0) {
changed['stroke-dasharray'] = this.dashes.join(' ');
changed['stroke-dashoffset'] = this.dashes.offset || 0;
}
// If there is no attached DOM element yet,
// create it with all necessary attributes.
if (!this._renderer.elem) {
changed.id = this._id;
this._renderer.elem = svg.createElement('path', changed);
domElement.appendChild(this._renderer.elem);
// Otherwise apply all pending attributes
} else {
svg.setAttributes(this._renderer.elem, changed);
}
if (this._flagClip) {
const clip = svg.getClip(this, domElement);
const elem = this._renderer.elem;
if (this._clip) {
elem.removeAttribute('id');
clip.setAttribute('id', this.id);
clip.appendChild(elem);
} else {
clip.removeAttribute('id');
elem.setAttribute('id', this.id);
this.parent._renderer.elem.appendChild(elem); // TODO: should be insertBefore
}
}
// Commented two-way functionality of clips / masks with groups and
// polygons. Uncomment when this bug is fixed:
// https://code.google.com/p/chromium/issues/detail?id=370951
if (this._flagMask) {
if (this._mask) {
svg[this._mask._renderer.type].render.call(this._mask, domElement);
this._renderer.elem.setAttribute(
'clip-path',
'url(#' + this._mask.id + ')'
);
} else {
this._renderer.elem.removeAttribute('clip-path');
}
}
return this.flagReset();
},
},
points: {
render: function (domElement) {
// Shortcut for hidden objects.
// Doesn't reset the flags, so changes are stored and
// applied once the object is visible again
if (this._opacity === 0 && !this._flagOpacity) {
return this;
}
this._update();
// Collect any attribute that needs to be changed here
const changed = {};
const flagMatrix = this._matrix.manual || this._flagMatrix;
if (flagMatrix) {
changed.transform = 'matrix(' + this._matrix.toString() + ')';
}
if (this._flagId) {
changed.id = this._id;
}
if (this._flagVertices || this._flagSize || this._flagSizeAttenuation) {
let size = this._size;
if (!this._sizeAttenuation) {
const me = this.worldMatrix.elements;
const m = decomposeMatrix(me[0], me[3], me[1], me[4], me[2], me[5]);
size /= Math.max(m.scaleX, m.scaleY);
}
const vertices = svg.pointsToString(this._renderer.collection, size);
changed.d = vertices;
}
if (this._fill && this._fill._renderer) {
this._renderer.hasFillEffect = true;
this._fill._update();
svg[this._fill._renderer.type].render.call(
this._fill,
domElement,
true
);
}
if (this._flagFill) {
changed.fill =
this._fill && this._fill.id
? 'url(#' + this._fill.id + ')'
: this._fill;
if (
this._renderer.hasFillEffect &&
typeof this._fill.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasFillEffect;
}
}
if (this._stroke && this._stroke._renderer) {
this._renderer.hasStrokeEffect = true;
this._stroke._update();
svg[this._stroke._renderer.type].render.call(
this._stroke,
domElement,
true
);
}
if (this._flagStroke) {
changed.stroke =
this._stroke && this._stroke.id
? 'url(#' + this._stroke.id + ')'
: this._stroke;
if (
this._renderer.hasStrokeEffect &&
typeof this._stroke.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasStrokeEffect;
}
}
if (this._flagLinewidth) {
changed['stroke-width'] = this._linewidth;
}
if (this._flagOpacity) {
changed['stroke-opacity'] = this._opacity;
changed['fill-opacity'] = this._opacity;
}
if (this._flagClassName) {
changed['class'] = this.classList.join(' ');
}
if (this._flagVisible) {
changed.visibility = this._visible ? 'visible' : 'hidden';
}
if (this.dashes && this.dashes.length > 0) {
changed['stroke-dasharray'] = this.dashes.join(' ');
changed['stroke-dashoffset'] = this.dashes.offset || 0;
}
// If there is no attached DOM element yet,
// create it with all necessary attributes.
if (!this._renderer.elem) {
changed.id = this._id;
this._renderer.elem = svg.createElement('path', changed);
domElement.appendChild(this._renderer.elem);
// Otherwise apply all pending attributes
} else {
svg.setAttributes(this._renderer.elem, changed);
}
return this.flagReset();
},
},
text: {
render: function (domElement) {
this._update();
const changed = {};
const flagMatrix = this._matrix.manual || this._flagMatrix;
if (flagMatrix) {
changed.transform = 'matrix(' + this._matrix.toString() + ')';
}
if (this._flagId) {
changed.id = this._id;
}
if (this._flagFamily) {
changed['font-family'] = this._family;
}
if (this._flagSize) {
changed['font-size'] = this._size;
}
if (this._flagLeading) {
changed['line-height'] = this._leading;
}
if (this._flagAlignment) {
changed['text-anchor'] =
svg.alignments[this._alignment] || this._alignment;
}
if (this._flagBaseline) {
changed['dominant-baseline'] =
svg.baselines[this._baseline] || this._baseline;
}
if (this._flagStyle) {
changed['font-style'] = this._style;
}
if (this._flagWeight) {
changed['font-weight'] = this._weight;
}
if (this._flagDecoration) {
changed['text-decoration'] = this._decoration;
}
if (this._flagDirection) {
changed['direction'] = this._direction;
}
if (this._fill && this._fill._renderer) {
this._renderer.hasFillEffect = true;
this._fill._update();
svg[this._fill._renderer.type].render.call(
this._fill,
domElement,
true
);
}
if (this._flagFill) {
changed.fill =
this._fill && this._fill.id
? 'url(#' + this._fill.id + ')'
: this._fill;
if (
this._renderer.hasFillEffect &&
typeof this._fill.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasFillEffect;
}
}
if (this._stroke && this._stroke._renderer) {
this._renderer.hasStrokeEffect = true;
this._stroke._update();
svg[this._stroke._renderer.type].render.call(
this._stroke,
domElement,
true
);
}
if (this._flagStroke) {
changed.stroke =
this._stroke && this._stroke.id
? 'url(#' + this._stroke.id + ')'
: this._stroke;
if (
this._renderer.hasStrokeEffect &&
typeof this._stroke.id === 'undefined'
) {
domElement.defs._flagUpdate = true;
delete this._renderer.hasStrokeEffect;
}
}
if (this._flagLinewidth) {
changed['stroke-width'] = this._linewidth;
}
if (this._flagOpacity) {
changed.opacity = this._opacity;
}
if (this._flagClassName) {
changed['class'] = this.classList.join(' ');
}
if (this._flagVisible) {
changed.visibility = this._visible ? 'visible' : 'hidden';
}
if (this.dashes && this.dashes.length > 0) {
changed['stroke-dasharray'] = this.dashes.join(' ');
changed['stroke-dashoffset'] = this.dashes.offset || 0;
}
if (!this._renderer.elem) {
changed.id = this._id;
this._renderer.elem = svg.createElement('text', changed);
domElement.appendChild(this._renderer.elem);
} else {
svg.setAttributes(this._renderer.elem, changed);
}
if (this._flagClip) {
const clip = svg.getClip(this, domElement);
const elem = this._renderer.elem;
if (this._clip) {
elem.removeAttribute('id');
clip.setAttribute('id', this.id);
clip.appendChild(elem);
} else {
clip.removeAttribute('id');
elem.setAttribute('id', this.id);
this.parent._renderer.elem.appendChild(elem); // TODO: should be insertBefore
}
}
// Commented two-way functionality of clips / masks with groups and
// polygons. Uncomment when this bug is fixed:
// https://code.google.com/p/chromium/issues/detail?id=370951
if (this._flagMask) {
if (this._mask) {
svg[this._mask._renderer.type].render.call(this._mask, domElement);
this._renderer.elem.setAttribute(
'clip-path',
'url(#' + this._mask.id + ')'
);
} else {
this._renderer.elem.removeAttribute('clip-path');
}
}
if (this._flagValue) {
this._renderer.elem.textContent = this._value;
}
return this.flagReset();
},
},
'linear-gradient': {
render: function (domElement, silent) {
if (!silent) {
this._update();
}
const changed = {};
if (this._flagId) {
changed.id = this._id;
}
if (this._flagEndPoints) {
changed.x1 = this.left._x;
changed.y1 = this.left._y;
changed.x2 = this.right._x;
changed.y2 = this.right._y;
}
if (this._flagSpread) {
changed.spreadMethod = this._spread;
}
if (this._flagUnits) {
changed.gradientUnits = this._units;
}
// If there is no attached DOM element yet,
// create it with all necessary attributes.
if (!this._renderer.elem) {
changed.id = this._id;
this._renderer.elem = svg.createElement('linearGradient', changed);
// Otherwise apply all pending attributes
} else {
svg.setAttributes(this._renderer.elem, changed);
}
if (this._renderer.elem.parentNode === null) {
domElement.defs.appendChild(this._renderer.elem);
}
if (this._flagStops) {
const lengthChanged =
this._renderer.elem.childNodes.length !== this.stops.length;
if (lengthChanged) {
while (this._renderer.elem.lastChild) {
this._renderer.elem.removeChild(this._renderer.elem.lastChild);
}
}
for (let i = 0; i < this.stops.length; i++) {
const stop = this.stops[i];
const attrs = {};
if (stop._flagOffset) {
attrs.offset = 100 * stop._offset + '%';
}
if (stop._flagColor) {
attrs['stop-color'] = stop._color;
}
if (stop._flagOpacity) {
attrs['stop-opacity'] = stop._opacity;
}
if (!stop._renderer.elem) {
stop._renderer.elem = svg.createElement('stop', attrs);
} else {
svg.setAttributes(stop._renderer.elem, attrs);
}
if (lengthChanged) {
this._renderer.elem.appendChild(stop._renderer.elem);
}
stop.flagReset();
}
}
return this.flagReset();
},
},
'radial-gradient': {
render: function (domElement, silent) {
if (!silent) {
this._update();
}
const changed = {};
if (this._flagId) {
changed.id = this._id;
}
if (this._flagCenter) {
changed.cx = this.center._x;
changed.cy = this.center._y;
}
if (this._flagFocal) {
changed.fx = this.focal._x;
changed.fy = this.focal._y;
}
if (this._flagRadius) {
changed.r = this._radius;
}
if (this._flagSpread) {
changed.spreadMethod = this._spread;
}
if (this._flagUnits) {
changed.gradientUnits = this._units;
}
// If there is no attached DOM element yet,
// create it with all necessary attributes.
if (!this._renderer.elem) {
changed.id = this._id;
this._renderer.elem = svg.createElement('radialGradient', changed);
// Otherwise apply all pending attributes
} else {
svg.setAttributes(this._renderer.elem, changed);
}
if (this._renderer.elem.parentNode === null) {
domElement.defs.appendChild(this._renderer.elem);
}
if (this._flagStops) {
const lengthChanged =
this._renderer.elem.childNodes.length !== this.stops.length;
if (lengthChanged) {
while (this._renderer.elem.lastChild) {
this._renderer.elem.removeChild(this._renderer.elem.lastChild);
}
}
for (let i = 0; i < this.stops.length; i++) {
const stop = this.stops[i];
const attrs = {};
if (stop._flagOffset) {
attrs.offset = 100 * stop._offset + '%';
}
if (stop._flagColor) {
attrs['stop-color'] = stop._color;
}
if (stop._flagOpacity) {
attrs['stop-opacity'] = stop._opacity;
}