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* Paper.js - The Swiss Army Knife of Vector Graphics Scripting.
* http://paperjs.org/
*
* Copyright (c) 2011 - 2020, Jürg Lehni & Jonathan Puckey
* http://juerglehni.com/ & https://puckey.studio/
*
* Distributed under the MIT license. See LICENSE file for details.
*
* All rights reserved.
*/
// TODO: remove eslint-disable comment and deal with errors over time
/* eslint-disable */
import { ref } from '~/globals';
import { Base } from '~/straps';
import { Matrix } from '~/basic/Matrix';
import { Point } from '~/basic/Point';
import { Rectangle } from '~/basic/Rectangle';
import { Size } from '~/basic/Size';
import { DomElement } from '~/dom/DomElement';
import { Group } from '~/item/Group';
import { Item } from '~/item/Item';
import { Project } from '~/item/Project';
import { Raster } from '~/item/Raster';
import { Shape } from '~/item/Shape';
import { SymbolDefinition } from '~/item/SymbolDefinition';
import { Http } from '~/net/Http';
import { Path } from '~/path/Path';
import { PathItem } from '~/path/PathItem';
import { Color } from '~/style/Color';
import { Gradient } from '~/style/Gradient';
import { GradientStop } from '~/style/GradientStop';
import { PointText } from '~/text/PointText';
import { SvgElement } from './SvgElement';
import { SvgStyles } from './SvgStyles';
/**
* A function scope holding all the functionality needed to convert a SVG DOM
* to a Paper.js DOM.
*/
new (function () {
// Define a couple of helper functions to easily read values from SVG
// objects, dealing with baseVal, and item lists.
// index is option, and if passed, causes a lookup in a list.
var definitions = {},
rootSize;
function getValue(node, name, isString, allowNull, allowPercent, defaultValue) {
// Interpret value as number. Never return NaN, but 0 instead.
// If the value is a sequence of numbers, parseFloat will
// return the first occurring number, which is enough for now.
var value = SvgElement.get(node, name) || defaultValue,
res = value == null ? (allowNull ? null : isString ? '' : 0) : isString ? value : parseFloat(value);
// Support for dimensions in percentage of the root size. If root-size
// is not set (e.g. during <defs>), just scale the percentage value to
// 0..1, as required by gradients with gradientUnits="objectBoundingBox"
return /%\s*$/.test(value)
? (res / 100) * (allowPercent ? 1 : rootSize[/x|^width/.test(name) ? 'width' : 'height'])
: res;
}
function getPoint(node, x, y, allowNull, allowPercent, defaultX, defaultY) {
x = getValue(node, x || 'x', false, allowNull, allowPercent, defaultX);
y = getValue(node, y || 'y', false, allowNull, allowPercent, defaultY);
return allowNull && (x == null || y == null) ? null : new Point(x, y);
}
function getSize(node, w, h, allowNull, allowPercent) {
// @ts-expect-error
w = getValue(node, w || 'width', false, allowNull, allowPercent);
// @ts-expect-error
h = getValue(node, h || 'height', false, allowNull, allowPercent);
return allowNull && (w == null || h == null) ? null : new Size(w, h);
}
// Converts a string attribute value to the specified type
function convertValue(value, type, lookup) {
return value === 'none'
? null
: type === 'number'
? parseFloat(value)
: type === 'array'
? value
? value.split(/[\s,]+/g).map(parseFloat)
: []
: type === 'color'
? getDefinition(value) || value
: type === 'lookup'
? lookup[value]
: value;
}
// Importer functions for various SVG node types
function importGroup(node, type, options, isRoot) {
var nodes = node.childNodes,
isClip = type === 'clippath',
isDefs = type === 'defs',
item = new Group(),
project = item._project,
currentStyle = project._currentStyle,
children = [];
if (!isClip && !isDefs) {
item = applyAttributes(item, node, isRoot);
// Style on items needs to be handled differently than all other
// items: We first apply the style to the item, then use it as the
// project's currentStyle, so it is used as a default for the
// creation of all nested items. importSVG then needs to check for
// items and avoid calling applyAttributes() again.
project._currentStyle = item._style.clone();
}
if (isRoot) {
// Import all defs first, since in SVG they can be in any location.
// e.g. Affinity Designer exports defs as last.
var defs = node.querySelectorAll('defs');
for (var i = 0, l = defs.length; i < l; i++) {
importNode(defs[i], options, false);
}
}
// Collect the children in an array and apply them all at once.
for (var i = 0, l = nodes.length; i < l; i++) {
var childNode = nodes[i],
child;
if (
childNode.nodeType === 1 &&
!/^defs$/i.test(childNode.nodeName) &&
(child = importNode(childNode, options, false)) &&
!(child instanceof SymbolDefinition)
)
children.push(child);
}
item.addChildren(children);
// Clip paths are reduced (unboxed) and their attributes applied at the
// end.
if (isClip) item = applyAttributes(item.reduce(), node, isRoot);
// Restore currentStyle
project._currentStyle = currentStyle;
if (isClip || isDefs) {
// We don't want the defs in the DOM. But we might want to use
// Symbols for them to save memory?
item.remove();
item = null;
}
return item;
}
function importPoly(node, type) {
var coords = node.getAttribute('points').match(/[+-]?(?:\d*\.\d+|\d+\.?)(?:[eE][+-]?\d+)?/g),
points = [];
for (var i = 0, l = coords.length; i < l; i += 2)
points.push(new Point(parseFloat(coords[i]), parseFloat(coords[i + 1])));
var path = new Path(points);
if (type === 'polygon') path.closePath();
return path;
}
function importPath(node) {
return PathItem.create(node.getAttribute('d'));
}
function importGradient(node, type) {
// @ts-expect-error
var id = (getValue(node, 'href', true) || '').substring(1),
radial = type === 'radialgradient',
gradient;
if (id) {
// Gradients are always wrapped in a Color object, so get the
// gradient object from there.
// TODO: Handle exception if there is no definition for this id.
gradient = definitions[id].getGradient();
// Create a clone if radial setting is different:
// @ts-expect-error
if (gradient._radial ^ radial) {
gradient = gradient.clone();
gradient._radial = radial;
}
} else {
var nodes = node.childNodes,
stops = [];
for (var i = 0, l = nodes.length; i < l; i++) {
var child = nodes[i];
// @ts-expect-error
if (child.nodeType === 1) stops.push(applyAttributes(new GradientStop(), child));
}
gradient = new Gradient(stops, radial);
}
var origin,
destination,
highlight,
// @ts-expect-error
scaleToBounds = getValue(node, 'gradientUnits', true) !== 'userSpaceOnUse';
// Allow percentages in all values if scaleToBounds is true:
if (radial) {
origin = getPoint(node, 'cx', 'cy', false, scaleToBounds, '50%', '50%');
destination = origin.add(getValue(node, 'r', false, false, scaleToBounds, '50%'), 0);
// @ts-expect-error
highlight = getPoint(node, 'fx', 'fy', true, scaleToBounds);
} else {
origin = getPoint(node, 'x1', 'y1', false, scaleToBounds, '0%', '0%');
destination = getPoint(node, 'x2', 'y2', false, scaleToBounds, '100%', '0%');
}
// @ts-expect-error
var color = applyAttributes(new Color(gradient, origin, destination, highlight), node);
// TODO: Consider adding support for _scaleToBounds to Color instead?
color._scaleToBounds = scaleToBounds;
// We don't return the gradient, since we only need a reference to it in
// definitions, which is created in applyAttributes()
return null;
}
// NOTE: All importers are lowercase, since jsdom is using uppercase
// nodeNames still.
var importers = {
'#document': function (node, type, options, isRoot) {
var nodes = node.childNodes;
for (var i = 0, l = nodes.length; i < l; i++) {
var child = nodes[i];
if (child.nodeType === 1) return importNode(child, options, isRoot);
}
},
// https://www.w3.org/TR/SVG/struct.html#Groups
g: importGroup,
// https://www.w3.org/TR/SVG/struct.html#NewDocument
svg: importGroup,
clippath: importGroup,
// https://www.w3.org/TR/SVG/shapes.html#PolygonElement
polygon: importPoly,
// https://www.w3.org/TR/SVG/shapes.html#PolylineElement
polyline: importPoly,
// https://www.w3.org/TR/SVG/paths.html
path: importPath,
// https://www.w3.org/TR/SVG/pservers.html#LinearGradients
lineargradient: importGradient,
// https://www.w3.org/TR/SVG/pservers.html#RadialGradients
radialgradient: importGradient,
// https://www.w3.org/TR/SVG/struct.html#ImageElement
image: function (node) {
// @ts-expect-error
var raster = new Raster(getValue(node, 'href', true));
raster.on('load', function () {
// @ts-expect-error
var size = getSize(node);
this.setSize(size);
// Since x and y start from the top left of an image, add
// half of its size. We also need to take the raster's matrix
// into account, which will be defined by the time the load
// event is called.
// @ts-expect-error
var center = getPoint(node).add(size.divide(2));
this._matrix.append(new Matrix().translate(center));
});
return raster;
},
// https://www.w3.org/TR/SVG/struct.html#SymbolElement
symbol: function (node, type, options, isRoot) {
return new SymbolDefinition(
// Pass true for dontCenter:
importGroup(node, type, options, isRoot),
true
);
},
// https://www.w3.org/TR/SVG/struct.html#DefsElement
defs: importGroup,
// https://www.w3.org/TR/SVG/struct.html#UseElement
use: function (node) {
// Note the namespaced xlink:href attribute is just called href
// as a property on node.
// TODO: Support overflow and width, height, in combination with
// overflow: hidden. Paper.js currently does not support
// SymbolItem clipping, but perhaps it should?
// @ts-expect-error
var id = (getValue(node, 'href', true) || '').substring(1),
definition = definitions[id],
// @ts-expect-error
point = getPoint(node);
return definition
? definition instanceof SymbolDefinition
? // When placing symbols, we need to take both point and
// matrix into account. place() does the right thing:
definition.place(point)
: // A normal item: Clone and translate it.
definition.clone().translate(point)
: null;
},
// https://www.w3.org/TR/SVG/shapes.html#InterfaceSVGCircleElement
circle: function (node) {
// @ts-expect-error
return new Shape.Circle(getPoint(node, 'cx', 'cy'), getValue(node, 'r'));
},
// https://www.w3.org/TR/SVG/shapes.html#InterfaceSVGEllipseElement
ellipse: function (node) {
// We only use object literal notation where the default one is not
// supported (e.g. center / radius fo Shape.Ellipse).
return new Shape.Ellipse({
// @ts-expect-error
center: getPoint(node, 'cx', 'cy'),
// @ts-expect-error
radius: getSize(node, 'rx', 'ry'),
});
},
// https://www.w3.org/TR/SVG/shapes.html#RectElement
rect: function (node) {
// @ts-expect-error
return new Shape.Rectangle(new Rectangle(getPoint(node), getSize(node)), getSize(node, 'rx', 'ry'));
},
// https://www.w3.org/TR/SVG/shapes.html#LineElement
line: function (node) {
// @ts-expect-error
return new Path.Line(getPoint(node, 'x1', 'y1'), getPoint(node, 'x2', 'y2'));
},
text: function (node) {
// Not supported by Paper.js
// x: multiple values for x
// y: multiple values for y
// dx: multiple values for x
// dy: multiple values for y
// TODO: Support for these is missing in Paper.js right now
// rotate: character rotation
// lengthAdjust:
// @ts-expect-error
var text = new PointText(getPoint(node).add(getPoint(node, 'dx', 'dy')));
text.setContent(node.textContent.trim() || '');
return text;
},
// https://www.w3.org/TR/SVG/struct.html#SwitchElement
// Conditional attributes are ignored and all children are rendered.
switch: importGroup,
};
// Attributes and Styles
// NOTE: Parameter sequence for all apply*() functions is:
// (item, value, name, node) rather than (item, node, name, value),
// so we can omit the less likely parameters from right to left.
function applyTransform(item, value, name, node) {
if (item.transform) {
// https://www.w3.org/TR/SVG/types.html#DataTypeTransformList
// Parse SVG transform string. First we split at /)\s*/, to separate
// commands
var transforms = (node.getAttribute(name) || '').split(/\)\s*/g),
matrix = new Matrix();
for (var i = 0, l = transforms.length; i < l; i++) {
var transform = transforms[i];
if (!transform) break;
// Command come before the '(', values after
var parts = transform.split(/\(\s*/),
command = parts[0].trim(),
v = parts[1].split(/[\s,]+/g);
// Convert values to floats
for (var j = 0, m = v.length; j < m; j++) v[j] = parseFloat(v[j]);
switch (command) {
case 'matrix':
matrix.append(new Matrix(v[0], v[1], v[2], v[3], v[4], v[5]));
break;
case 'rotate':
matrix.rotate(v[0], v[1] || 0, v[2] || 0);
break;
case 'translate':
matrix.translate(v[0], v[1] || 0);
break;
case 'scale':
matrix.scale(v);
break;
case 'skewX':
matrix.skew(v[0], 0);
break;
case 'skewY':
matrix.skew(0, v[0]);
break;
}
}
item.transform(matrix);
}
}
function applyOpacity(item, value, name) {
// https://www.w3.org/TR/SVG/painting.html#FillOpacityProperty
// https://www.w3.org/TR/SVG/painting.html#StrokeOpacityProperty
var key = name === 'fill-opacity' ? 'getFillColor' : 'getStrokeColor',
color = item[key] && item[key]();
if (color) color.setAlpha(parseFloat(value));
}
// Create apply-functions for attributes, and merge in those for SVGStyles.
// We need to define style attributes first, and merge in all others after,
// since transform needs to be applied after fill color, as transformations
// can affect gradient fills.
// Use Base.set() to control sequence of attributes and have all entries in
// SvgStyles (e.g. 'stroke') before the additional attributes below (e.g.
// 'stroke-opacity'). See issue #694.
var attributes = Base.set(
Base.each(
SvgStyles,
function (entry) {
this[entry.attribute] = function (item, value) {
if (item[entry.set]) {
item[entry.set](convertValue(value, entry.type, entry.fromSVG));
if (entry.type === 'color') {
// Do not use result of convertValue() above, since calling
// the setter will convert a color and clone it if necessary
var color = item[entry.get]();
if (color) {
// Emulate SVG's gradientUnits="objectBoundingBox"
if (color._scaleToBounds) {
var bounds = item.getBounds();
color.transform(new Matrix().translate(bounds.getPoint()).scale(bounds.getSize()));
}
}
}
}
};
},
{}
),
{
id: function (item, value) {
definitions[value] = item;
if (item.setName) item.setName(value);
},
'clip-path': function (item, value) {
// https://www.w3.org/TR/SVG/masking.html#ClipPathProperty
var clip = getDefinition(value);
if (clip) {
clip = clip.clone();
clip.setClipMask(true);
// If item is already a group, move the clip-path inside
if (item instanceof Group) {
item.insertChild(0, clip);
} else {
return new Group(clip, item);
}
}
},
gradientTransform: applyTransform,
transform: applyTransform,
'fill-opacity': applyOpacity,
'stroke-opacity': applyOpacity,
visibility: function (item, value) {
if (item.setVisible) item.setVisible(value === 'visible');
},
display: function (item, value) {
// NOTE: 'none' gets translated to null in getAttribute()
if (item.setVisible) item.setVisible(value !== null);
},
'stop-color': function (item, value) {
// https://www.w3.org/TR/SVG/pservers.html#StopColorProperty
if (item.setColor) item.setColor(value);
},
'stop-opacity': function (item, value) {
// https://www.w3.org/TR/SVG/pservers.html#StopOpacityProperty
// NOTE: It is important that this is applied after stop-color!
if (item._color) item._color.setAlpha(parseFloat(value));
},
offset: function (item, value) {
// https://www.w3.org/TR/SVG/pservers.html#StopElementOffsetAttribute
if (item.setOffset) {
var percent = value.match(/(.*)%$/);
item.setOffset(percent ? percent[1] / 100 : parseFloat(value));
}
},
viewBox: function (item, value, name, node, styles) {
// https://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute
// TODO: implement preserveAspectRatio attribute
// viewBox will be applied both to the group that's created for the
// content in SymbolDefinition#item, and the SymbolItem itself.
// @ts-expect-error
var rect = new Rectangle(convertValue(value, 'array')),
// @ts-expect-error
size = getSize(node, null, null, true),
group,
matrix;
if (item instanceof Group) {
// This is either a top-level svg node, or the container for a
// symbol.
var scale = size ? size.divide(rect.getSize()) : 1,
matrix = new Matrix().scale(scale).translate(rect.getPoint().negate());
group = item;
} else if (item instanceof SymbolDefinition) {
// The symbol is wrapping a group. Note that viewBox was already
// applied to the group, and the above code was executed for it.
// All that is left to handle here for SymbolDefinition is
// clipping. We can't do it at group level because
// applyAttributes() gets called for groups before their
// children are added, for styling reasons. See importGroup()
if (size) rect.setSize(size);
group = item._item;
}
if (group) {
if (getAttribute(node, 'overflow', styles) !== 'visible') {
// Add a clip path at the top of this symbol's group
var clip = new Shape.Rectangle(rect);
clip.setClipMask(true);
group.addChild(clip);
}
if (matrix) group.transform(matrix);
}
},
}
);
function getAttribute(node, name, styles) {
// First see if the given attribute is defined.
var attr = node.attributes[name],
value = attr && attr.value;
if (!value && node.style) {
// Fallback to using styles. See if there is a style, either set
// directly on the object or applied to it through CSS rules.
// We also need to filter out inheritance from their parents.
var style = Base.camelize(name);
value = node.style[style];
if (!value && styles.node[style] !== styles.parent[style]) value = styles.node[style];
}
// Return undefined if attribute is not defined, but null if it's
// defined as not set (e.g. fill / stroke).
return !value ? undefined : value === 'none' ? null : value;
}
/**
* Converts various SVG styles and attributes into Paper.js styles and
* attributes and applies them to the passed item.
*
* @param {SVGElement} node an SVG node to read style and attributes from
* @param {Item} item the item to apply the style and attributes to
*/
function applyAttributes(item, node, isRoot) {
// SVG attributes can be set both as styles and direct node
// attributes, so we need to handle both.
var parent = node.parentNode,
styles = {
node: DomElement.getStyles(node) || {},
// Do not check for inheritance if this is root, to make the
// default SVG settings stick. Also detect defs parents, of
// which children need to explicitly inherit their styles.
parent: (!isRoot && !/^defs$/i.test(parent.tagName) && DomElement.getStyles(parent)) || {},
};
Base.each(attributes, function (apply, name) {
var value = getAttribute(node, name, styles);
// 'clip-path' attribute returns a new item, support it here:
item = (value !== undefined && apply(item, value, name, node, styles)) || item;
});
return item;
}
function getDefinition(value) {
// When url() comes from a style property, '#'' seems to be missing on
// WebKit. We also get variations of quotes or no quotes, single or
// double, so handle it all with one regular expression:
var match = value && value.match(/\((?:["'#]*)([^"')]+)/),
name = match && match[1],
res =
name &&
definitions[
globalThis.window
? // This is required by Firefox, which can produce absolute
// urls for local gradients, see #1001:
name.replace(globalThis.window.location.href.split('#')[0] + '#', '')
: name
];
// Patch in support for SVG's gradientUnits="objectBoundingBox" through
// Color#_scaleToBounds
if (res && res._scaleToBounds) {
// Always create a clone, so it can be transformed when used.
res = res.clone();
res._scaleToBounds = true;
}
return res;
}
function importNode(node, options, isRoot) {
// jsdom in Node.js uses uppercase values for nodeName...
var type = node.nodeName.toLowerCase(),
isElement = type !== '#document',
body = globalThis.document.body,
container,
parent,
next;
if (isRoot && isElement) {
// Set rootSize to view size, as getSize() may refer to it (#1242).
rootSize = ref.paper.getView().getSize();
// Now set rootSize to the root element size, and fall-back to view.
// @ts-expect-error
rootSize = getSize(node, null, null, true) || rootSize;
// We need to move the SVG node to the current document, so default
// styles are correctly inherited! For this we create and insert a
// temporary SVG container which is removed again at the end. This
// container also helps fix a bug on IE.
container = SvgElement.create('svg', {
// If no stroke-width is set, IE/Edge appears to have a
// default of 0.01px. We can set a default style on the
// parent container as a more sensible fall-back. Also, browsers
// have a default miter-limit of 4, while Paper.js has 10
style: 'stroke-width: 1px; stroke-miterlimit: 10',
});
parent = node.parentNode;
next = node.nextSibling;
container.appendChild(node);
body.appendChild(container);
}
// Have items imported from SVG not bake in all transformations to their
// content and children, as this is how SVG works too, but preserve the
// current setting so we can restore it after. Also don't insert them
// into the scene graph automatically, as we do so by hand.
var settings = ref.paper.settings,
applyMatrix = settings.applyMatrix,
insertItems = settings.insertItems;
settings.applyMatrix = false;
settings.insertItems = false;
var importer = importers[type],
item = (importer && importer(node, type, options, isRoot)) || null;
settings.insertItems = insertItems;
settings.applyMatrix = applyMatrix;
if (item) {
// Do not apply attributes if this is a #document node.
// See importGroup() for an explanation of filtering for Group:
if (isElement && !(item instanceof Group)) item = applyAttributes(item, node, isRoot);
// Support onImportItem callback, to provide mechanism to handle
// special attributes (e.g. inkscape:transform-center)
var onImport = options.onImport,
data = isElement && node.getAttribute('data-paper-data');
if (onImport) item = onImport(node, item, options) || item;
if (options.expandShapes && item instanceof Shape) {
item.remove();
item = item.toPath();
}
if (data) item._data = JSON.parse(data);
}
if (container) {
// After import, move things back to how they were:
body.removeChild(container);
if (parent) {
if (next) {
parent.insertBefore(node, next);
} else {
parent.appendChild(node);
}
}
}
// Clear definitions at the end of import?
if (isRoot) {
definitions = {};
// Now if settings.applyMatrix was set, apply recursively and set
// #applyMatrix = true on the item and all children.
if (item && Base.pick(options.applyMatrix, applyMatrix)) item.matrix.apply(true, true);
}
return item;
}
function importSVG(source, options, owner) {
if (!source) return null;
options = typeof options === 'function' ? { onLoad: options } : options || {};
// Remember current scope so we can restore it in onLoad.
var scope = ref.paper,
item = null;
function onLoad(svg) {
try {
var node =
typeof svg === 'object'
? svg
: new globalThis.window.DOMParser().parseFromString(svg.trim(), 'image/svg+xml');
if (!node.nodeName) {
node = null;
throw new Error('Unsupported SVG source: ' + source);
}
ref.paper = scope;
item = importNode(node, options, true);
if (!options || options.insert !== false) {
// TODO: Implement support for multiple Layers on Project.
owner._insertItem(undefined, item);
}
var onLoad = options.onLoad;
if (onLoad) onLoad(item, svg);
} catch (e) {
// @ts-expect-error
onError(e);
}
}
function onError(message, status) {
console.log('message===message');
console.log(message);
console.log(status);
console.log(options);
var onError = options.onError;
if (onError) {
onError(message, status);
} else {
throw new Error(message);
}
}
// Have the group not pass on all transformations to its children,
// as this is how SVG works too.
// See if it's a string but handle markup separately, using `[\s\S]` to
// also match the first tag if it only starts on the second line in a
// multi-line string.
if (typeof source === 'string' && !/^[\s\S]*</.test(source)) {
// First see if we're meant to import an element with the given
// id.
var node = globalThis.document.getElementById(source);
// Check if the string does not represent SVG data, in which
// case it must be the URL of a SVG to be loaded.
if (node) {
onLoad(node);
} else {
Http.request({
url: source,
async: true,
onLoad: onLoad,
onError: onError,
});
}
} else if (typeof File !== 'undefined' && source instanceof File) {
// Load local file through FileReader
var reader = new FileReader();
reader.onload = function () {
onLoad(reader.result);
};
reader.onerror = function () {
// @ts-expect-error
onError(reader.error);
};
return reader.readAsText(source);
} else {
onLoad(source);
}
return item;
}
// NOTE: Documentation is in Item#importSVG()
Item.inject({
importSVG: function (node, options) {
return importSVG(node, options, this);
},
});
// NOTE: Documentation is in Project#importSVG()
Project.inject({
importSVG: function (node, options) {
this.activate();
return importSVG(node, options, this);
},
});
})();
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