1392 lines
43 KiB
JavaScript
1392 lines
43 KiB
JavaScript
/* globals jQuery */
|
|
/**
|
|
* Miscellaneous utilities
|
|
* @module utilities
|
|
* @license MIT
|
|
*
|
|
* @copyright 2010 Alexis Deveria, 2010 Jeff Schiller
|
|
*/
|
|
|
|
import './svgpathseg.js';
|
|
import jQueryPluginSVG from './jQuery.attr.js'; // Needed for SVG attribute setting and array form with `attr`
|
|
import {NS} from './namespaces.js';
|
|
import {getTransformList} from './svgtransformlist.js';
|
|
import {setUnitAttr, getTypeMap} from './units.js';
|
|
import {convertPath} from './path.js';
|
|
import {
|
|
hasMatrixTransform, transformListToTransform, transformBox
|
|
} from './math.js';
|
|
import {
|
|
isWebkit, supportsHVLineContainerBBox, supportsPathBBox, supportsXpath,
|
|
supportsSelectors
|
|
} from './browser.js';
|
|
|
|
// Constants
|
|
const $ = jQueryPluginSVG(jQuery);
|
|
|
|
// String used to encode base64.
|
|
const KEYSTR = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
|
|
|
|
// Much faster than running getBBox() every time
|
|
const visElems = 'a,circle,ellipse,foreignObject,g,image,line,path,polygon,polyline,rect,svg,text,tspan,use';
|
|
const visElemsArr = visElems.split(',');
|
|
// const hidElems = 'clipPath,defs,desc,feGaussianBlur,filter,linearGradient,marker,mask,metadata,pattern,radialGradient,stop,switch,symbol,title,textPath';
|
|
|
|
let editorContext_ = null;
|
|
let domdoc_ = null;
|
|
let domcontainer_ = null;
|
|
let svgroot_ = null;
|
|
|
|
/**
|
|
* Object with the following keys/values
|
|
* @typedef {PlainObject} module:utilities.SVGElementJSON
|
|
* @property {string} element - Tag name of the SVG element to create
|
|
* @property {PlainObject.<string, string>} attr - Has key-value attributes to assign to the new element
|
|
* @property {boolean} [curStyles=false] - Indicates whether current style attributes should be applied first
|
|
* @property {module:utilities.SVGElementJSON[]} [children] - Data objects to be added recursively as children
|
|
* @property {string} [namespace="http://www.w3.org/2000/svg"] - Indicate a (non-SVG) namespace
|
|
*/
|
|
|
|
/**
|
|
* An object that creates SVG elements for the canvas.
|
|
*
|
|
* @interface module:utilities.EditorContext
|
|
* @property {module:path.pathActions} pathActions
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getSVGContent
|
|
* @returns {SVGSVGElement}
|
|
*/
|
|
/**
|
|
* Create a new SVG element based on the given object keys/values and add it
|
|
* to the current layer.
|
|
* The element will be run through `cleanupElement` before being returned
|
|
* @function module:utilities.EditorContext#addSVGElementFromJson
|
|
* @param {module:utilities.SVGElementJSON} data
|
|
* @returns {Element} The new element
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getSelectedElements
|
|
* @returns {Element[]} the array with selected DOM elements
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getDOMDocument
|
|
* @returns {HTMLDocument}
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getDOMContainer
|
|
* @returns {HTMLElement}
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getSVGRoot
|
|
* @returns {SVGSVGElement}
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getBaseUnit
|
|
* @returns {string}
|
|
*/
|
|
/**
|
|
* @function module:utilities.EditorContext#getSnappingStep
|
|
* @returns {Float|string}
|
|
*/
|
|
|
|
/**
|
|
* @function module:utilities.init
|
|
* @param {module:utilities.EditorContext} editorContext
|
|
* @returns {void}
|
|
*/
|
|
export const init = function (editorContext) {
|
|
editorContext_ = editorContext;
|
|
domdoc_ = editorContext.getDOMDocument();
|
|
domcontainer_ = editorContext.getDOMContainer();
|
|
svgroot_ = editorContext.getSVGRoot();
|
|
};
|
|
|
|
/**
|
|
* Used to prevent the [Billion laughs attack]{@link https://en.wikipedia.org/wiki/Billion_laughs_attack}.
|
|
* @function module:utilities.dropXMLInteralSubset
|
|
* @param {string} str String to be processed
|
|
* @returns {string} The string with entity declarations in the internal subset removed
|
|
* @todo This might be needed in other places `parseFromString` is used even without LGTM flagging
|
|
*/
|
|
export const dropXMLInteralSubset = (str) => {
|
|
return str.replace(/(<!DOCTYPE\s+\w*\s*\[).*(\?\]>)/, '$1$2');
|
|
};
|
|
|
|
/**
|
|
* Converts characters in a string to XML-friendly entities.
|
|
* @function module:utilities.toXml
|
|
* @example `&` becomes `&`
|
|
* @param {string} str - The string to be converted
|
|
* @returns {string} The converted string
|
|
*/
|
|
export const toXml = function (str) {
|
|
// ' is ok in XML, but not HTML
|
|
// > does not normally need escaping, though it can if within a CDATA expression (and preceded by "]]")
|
|
return str
|
|
.replace(/&/g, '&')
|
|
.replace(/</g, '<')
|
|
.replace(/>/g, '>')
|
|
.replace(/"/g, '"')
|
|
.replace(/'/g, '''); // Note: `'` is XML only
|
|
};
|
|
|
|
/**
|
|
* Converts XML entities in a string to single characters.
|
|
* @function module:utilities.fromXml
|
|
* @example `&` becomes `&`
|
|
* @param {string} str - The string to be converted
|
|
* @returns {string} The converted string
|
|
*/
|
|
export function fromXml (str) {
|
|
return $('<p/>').html(str).text();
|
|
}
|
|
|
|
// This code was written by Tyler Akins and has been placed in the
|
|
// public domain. It would be nice if you left this header intact.
|
|
// Base64 code from Tyler Akins -- http://rumkin.com
|
|
|
|
// schiller: Removed string concatenation in favour of Array.join() optimization,
|
|
// also precalculate the size of the array needed.
|
|
|
|
/**
|
|
* Converts a string to base64.
|
|
* @function module:utilities.encode64
|
|
* @param {string} input
|
|
* @returns {string} Base64 output
|
|
*/
|
|
export function encode64 (input) {
|
|
// base64 strings are 4/3 larger than the original string
|
|
input = encodeUTF8(input); // convert non-ASCII characters
|
|
// input = convertToXMLReferences(input);
|
|
if (window.btoa) {
|
|
return window.btoa(input); // Use native if available
|
|
}
|
|
const output = new Array(Math.floor((input.length + 2) / 3) * 4);
|
|
|
|
let i = 0,
|
|
p = 0;
|
|
do {
|
|
const chr1 = input.charCodeAt(i++);
|
|
const chr2 = input.charCodeAt(i++);
|
|
const chr3 = input.charCodeAt(i++);
|
|
|
|
/* eslint-disable no-bitwise */
|
|
const enc1 = chr1 >> 2;
|
|
const enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
|
|
|
|
let enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
|
|
let enc4 = chr3 & 63;
|
|
/* eslint-enable no-bitwise */
|
|
|
|
if (isNaN(chr2)) {
|
|
enc3 = 64;
|
|
enc4 = 64;
|
|
} else if (isNaN(chr3)) {
|
|
enc4 = 64;
|
|
}
|
|
|
|
output[p++] = KEYSTR.charAt(enc1);
|
|
output[p++] = KEYSTR.charAt(enc2);
|
|
output[p++] = KEYSTR.charAt(enc3);
|
|
output[p++] = KEYSTR.charAt(enc4);
|
|
} while (i < input.length);
|
|
|
|
return output.join('');
|
|
}
|
|
|
|
/**
|
|
* Converts a string from base64.
|
|
* @function module:utilities.decode64
|
|
* @param {string} input Base64-encoded input
|
|
* @returns {string} Decoded output
|
|
*/
|
|
export function decode64 (input) {
|
|
if (window.atob) {
|
|
return decodeUTF8(window.atob(input));
|
|
}
|
|
|
|
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
|
|
input = input.replace(/[^A-Za-z0-9+/=]/g, '');
|
|
|
|
let output = '';
|
|
let i = 0;
|
|
|
|
do {
|
|
const enc1 = KEYSTR.indexOf(input.charAt(i++));
|
|
const enc2 = KEYSTR.indexOf(input.charAt(i++));
|
|
const enc3 = KEYSTR.indexOf(input.charAt(i++));
|
|
const enc4 = KEYSTR.indexOf(input.charAt(i++));
|
|
|
|
/* eslint-disable no-bitwise */
|
|
const chr1 = (enc1 << 2) | (enc2 >> 4);
|
|
const chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
|
|
const chr3 = ((enc3 & 3) << 6) | enc4;
|
|
/* eslint-enable no-bitwise */
|
|
|
|
output += String.fromCharCode(chr1);
|
|
|
|
if (enc3 !== 64) {
|
|
output += String.fromCharCode(chr2);
|
|
}
|
|
if (enc4 !== 64) {
|
|
output += String.fromCharCode(chr3);
|
|
}
|
|
} while (i < input.length);
|
|
return decodeUTF8(output);
|
|
}
|
|
|
|
/**
|
|
* @function module:utilities.decodeUTF8
|
|
* @param {string} argString
|
|
* @returns {string}
|
|
*/
|
|
export function decodeUTF8 (argString) {
|
|
return decodeURIComponent(escape(argString));
|
|
}
|
|
|
|
// codedread:does not seem to work with webkit-based browsers on OSX // Brettz9: please test again as function upgraded
|
|
/**
|
|
* @function module:utilities.encodeUTF8
|
|
* @param {string} argString
|
|
* @returns {string}
|
|
*/
|
|
export const encodeUTF8 = function (argString) {
|
|
return unescape(encodeURIComponent(argString));
|
|
};
|
|
|
|
/**
|
|
* Convert dataURL to object URL.
|
|
* @function module:utilities.dataURLToObjectURL
|
|
* @param {string} dataurl
|
|
* @returns {string} object URL or empty string
|
|
*/
|
|
export const dataURLToObjectURL = function (dataurl) {
|
|
if (typeof Uint8Array === 'undefined' || typeof Blob === 'undefined' || typeof URL === 'undefined' || !URL.createObjectURL) {
|
|
return '';
|
|
}
|
|
const arr = dataurl.split(','),
|
|
mime = arr[0].match(/:(.*?);/)[1],
|
|
bstr = atob(arr[1]);
|
|
let n = bstr.length;
|
|
const u8arr = new Uint8Array(n);
|
|
while (n--) {
|
|
u8arr[n] = bstr.charCodeAt(n);
|
|
}
|
|
const blob = new Blob([u8arr], {type: mime});
|
|
return URL.createObjectURL(blob);
|
|
};
|
|
|
|
/**
|
|
* Get object URL for a blob object.
|
|
* @function module:utilities.createObjectURL
|
|
* @param {Blob} blob A Blob object or File object
|
|
* @returns {string} object URL or empty string
|
|
*/
|
|
export const createObjectURL = function (blob) {
|
|
if (!blob || typeof URL === 'undefined' || !URL.createObjectURL) {
|
|
return '';
|
|
}
|
|
return URL.createObjectURL(blob);
|
|
};
|
|
|
|
/**
|
|
* @property {string} blankPageObjectURL
|
|
*/
|
|
export const blankPageObjectURL = (function () {
|
|
if (typeof Blob === 'undefined') {
|
|
return '';
|
|
}
|
|
const blob = new Blob(['<html><head><title>SVG-edit</title></head><body> </body></html>'], {type: 'text/html'});
|
|
return createObjectURL(blob);
|
|
})();
|
|
|
|
/**
|
|
* Converts a string to use XML references (for non-ASCII).
|
|
* @function module:utilities.convertToXMLReferences
|
|
* @param {string} input
|
|
* @returns {string} Decimal numeric character references
|
|
*/
|
|
export const convertToXMLReferences = function (input) {
|
|
let output = '';
|
|
[...input].forEach((ch) => {
|
|
const c = ch.charCodeAt();
|
|
if (c <= 127) {
|
|
output += ch;
|
|
} else {
|
|
output += `&#${c};`;
|
|
}
|
|
});
|
|
return output;
|
|
};
|
|
|
|
/**
|
|
* Cross-browser compatible method of converting a string to an XML tree.
|
|
* Found this function [here]{@link http://groups.google.com/group/jquery-dev/browse_thread/thread/c6d11387c580a77f}.
|
|
* @function module:utilities.text2xml
|
|
* @param {string} sXML
|
|
* @throws {Error}
|
|
* @returns {XMLDocument}
|
|
*/
|
|
export const text2xml = function (sXML) {
|
|
if (sXML.includes('<svg:svg')) {
|
|
sXML = sXML.replace(/<(\/?)svg:/g, '<$1').replace('xmlns:svg', 'xmlns');
|
|
}
|
|
|
|
let out, dXML;
|
|
try {
|
|
dXML = (window.DOMParser) ? new DOMParser() : new window.ActiveXObject('Microsoft.XMLDOM');
|
|
dXML.async = false;
|
|
} catch (e) {
|
|
throw new Error('XML Parser could not be instantiated');
|
|
}
|
|
try {
|
|
if (dXML.loadXML) {
|
|
out = (dXML.loadXML(sXML)) ? dXML : false;
|
|
} else {
|
|
out = dXML.parseFromString(sXML, 'text/xml');
|
|
}
|
|
} catch (e2) { throw new Error('Error parsing XML string'); }
|
|
return out;
|
|
};
|
|
|
|
/**
|
|
* @typedef {PlainObject} module:utilities.BBoxObject (like `DOMRect`)
|
|
* @property {Float} x
|
|
* @property {Float} y
|
|
* @property {Float} width
|
|
* @property {Float} height
|
|
*/
|
|
|
|
/**
|
|
* Converts a `SVGRect` into an object.
|
|
* @function module:utilities.bboxToObj
|
|
* @param {SVGRect} bbox - a SVGRect
|
|
* @returns {module:utilities.BBoxObject} An object with properties names x, y, width, height.
|
|
*/
|
|
export const bboxToObj = function ({x, y, width, height}) {
|
|
return {x, y, width, height};
|
|
};
|
|
|
|
/**
|
|
* @callback module:utilities.TreeWalker
|
|
* @param {Element} elem - DOM element being traversed
|
|
* @returns {void}
|
|
*/
|
|
|
|
/**
|
|
* Walks the tree and executes the callback on each element in a top-down fashion.
|
|
* @function module:utilities.walkTree
|
|
* @param {Element} elem - DOM element to traverse
|
|
* @param {module:utilities.TreeWalker} cbFn - Callback function to run on each element
|
|
* @returns {void}
|
|
*/
|
|
export const walkTree = function (elem, cbFn) {
|
|
if (elem && elem.nodeType === 1) {
|
|
cbFn(elem);
|
|
let i = elem.childNodes.length;
|
|
while (i--) {
|
|
walkTree(elem.childNodes.item(i), cbFn);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Walks the tree and executes the callback on each element in a depth-first fashion.
|
|
* @function module:utilities.walkTreePost
|
|
* @todo FIXME: Shouldn't this be calling walkTreePost?
|
|
* @param {Element} elem - DOM element to traverse
|
|
* @param {module:utilities.TreeWalker} cbFn - Callback function to run on each element
|
|
* @returns {void}
|
|
*/
|
|
export const walkTreePost = function (elem, cbFn) {
|
|
if (elem && elem.nodeType === 1) {
|
|
let i = elem.childNodes.length;
|
|
while (i--) {
|
|
walkTree(elem.childNodes.item(i), cbFn);
|
|
}
|
|
cbFn(elem);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Extracts the URL from the `url(...)` syntax of some attributes.
|
|
* Three variants:
|
|
* - `<circle fill="url(someFile.svg#foo)" />`
|
|
* - `<circle fill="url('someFile.svg#foo')" />`
|
|
* - `<circle fill='url("someFile.svg#foo")' />`
|
|
* @function module:utilities.getUrlFromAttr
|
|
* @param {string} attrVal The attribute value as a string
|
|
* @returns {string} String with just the URL, like "someFile.svg#foo"
|
|
*/
|
|
export const getUrlFromAttr = function (attrVal) {
|
|
if (attrVal) {
|
|
// url('#somegrad')
|
|
if (attrVal.startsWith('url("')) {
|
|
return attrVal.substring(5, attrVal.indexOf('"', 6));
|
|
}
|
|
// url('#somegrad')
|
|
if (attrVal.startsWith("url('")) {
|
|
return attrVal.substring(5, attrVal.indexOf("'", 6));
|
|
}
|
|
if (attrVal.startsWith('url(')) {
|
|
return attrVal.substring(4, attrVal.indexOf(')'));
|
|
}
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* @function module:utilities.getHref
|
|
* @param {Element} elem
|
|
* @returns {string} The given element's `xlink:href` value
|
|
*/
|
|
export let getHref = function (elem) { // eslint-disable-line import/no-mutable-exports
|
|
return elem.getAttributeNS(NS.XLINK, 'href');
|
|
};
|
|
|
|
/**
|
|
* Sets the given element's `xlink:href` value.
|
|
* @function module:utilities.setHref
|
|
* @param {Element} elem
|
|
* @param {string} val
|
|
* @returns {void}
|
|
*/
|
|
export let setHref = function (elem, val) { // eslint-disable-line import/no-mutable-exports
|
|
elem.setAttributeNS(NS.XLINK, 'xlink:href', val);
|
|
};
|
|
|
|
/**
|
|
* @function module:utilities.findDefs
|
|
* @returns {SVGDefsElement} The document's `<defs>` element, creating it first if necessary
|
|
*/
|
|
export const findDefs = function () {
|
|
const svgElement = editorContext_.getSVGContent();
|
|
let defs = svgElement.getElementsByTagNameNS(NS.SVG, 'defs');
|
|
if (defs.length > 0) {
|
|
defs = defs[0];
|
|
} else {
|
|
defs = svgElement.ownerDocument.createElementNS(NS.SVG, 'defs');
|
|
if (svgElement.firstChild) {
|
|
// first child is a comment, so call nextSibling
|
|
svgElement.insertBefore(defs, svgElement.firstChild.nextSibling);
|
|
// svgElement.firstChild.nextSibling.before(defs); // Not safe
|
|
} else {
|
|
svgElement.append(defs);
|
|
}
|
|
}
|
|
return defs;
|
|
};
|
|
|
|
// TODO(codedread): Consider moving the next to functions to bbox.js
|
|
|
|
/**
|
|
* Get correct BBox for a path in Webkit.
|
|
* Converted from code found [here]{@link http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html}.
|
|
* @function module:utilities.getPathBBox
|
|
* @param {SVGPathElement} path - The path DOM element to get the BBox for
|
|
* @returns {module:utilities.BBoxObject} A BBox-like object
|
|
*/
|
|
export const getPathBBox = function (path) {
|
|
const seglist = path.pathSegList;
|
|
const tot = seglist.numberOfItems;
|
|
|
|
const bounds = [[], []];
|
|
const start = seglist.getItem(0);
|
|
let P0 = [start.x, start.y];
|
|
|
|
const getCalc = function (j, P1, P2, P3) {
|
|
return function (t) {
|
|
return 1 - (t ** 3) * P0[j] +
|
|
3 * 1 - (t ** 2) * t * P1[j] +
|
|
3 * (1 - t) * (t ** 2) * P2[j] +
|
|
(t ** 3) * P3[j];
|
|
};
|
|
};
|
|
|
|
for (let i = 0; i < tot; i++) {
|
|
const seg = seglist.getItem(i);
|
|
|
|
if (seg.x === undefined) { continue; }
|
|
|
|
// Add actual points to limits
|
|
bounds[0].push(P0[0]);
|
|
bounds[1].push(P0[1]);
|
|
|
|
if (seg.x1) {
|
|
const P1 = [seg.x1, seg.y1],
|
|
P2 = [seg.x2, seg.y2],
|
|
P3 = [seg.x, seg.y];
|
|
|
|
for (let j = 0; j < 2; j++) {
|
|
const calc = getCalc(j, P1, P2, P3);
|
|
|
|
const b = 6 * P0[j] - 12 * P1[j] + 6 * P2[j];
|
|
const a = -3 * P0[j] + 9 * P1[j] - 9 * P2[j] + 3 * P3[j];
|
|
const c = 3 * P1[j] - 3 * P0[j];
|
|
|
|
if (a === 0) {
|
|
if (b === 0) { continue; }
|
|
const t = -c / b;
|
|
if (t > 0 && t < 1) {
|
|
bounds[j].push(calc(t));
|
|
}
|
|
continue;
|
|
}
|
|
const b2ac = (b ** 2) - 4 * c * a;
|
|
if (b2ac < 0) { continue; }
|
|
const t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
|
|
if (t1 > 0 && t1 < 1) { bounds[j].push(calc(t1)); }
|
|
const t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
|
|
if (t2 > 0 && t2 < 1) { bounds[j].push(calc(t2)); }
|
|
}
|
|
P0 = P3;
|
|
} else {
|
|
bounds[0].push(seg.x);
|
|
bounds[1].push(seg.y);
|
|
}
|
|
}
|
|
|
|
const x = Math.min.apply(null, bounds[0]);
|
|
const w = Math.max.apply(null, bounds[0]) - x;
|
|
const y = Math.min.apply(null, bounds[1]);
|
|
const h = Math.max.apply(null, bounds[1]) - y;
|
|
return {
|
|
x,
|
|
y,
|
|
width: w,
|
|
height: h
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Get the given/selected element's bounding box object, checking for
|
|
* horizontal/vertical lines (see issue 717)
|
|
* Note that performance is currently terrible, so some way to improve would
|
|
* be great.
|
|
* @param {Element} selected - Container or `<use>` DOM element
|
|
* @returns {DOMRect} Bounding box object
|
|
*/
|
|
function groupBBFix (selected) {
|
|
if (supportsHVLineContainerBBox()) {
|
|
try { return selected.getBBox(); } catch (e) {}
|
|
}
|
|
const ref = $.data(selected, 'ref');
|
|
let matched = null;
|
|
let ret, copy;
|
|
|
|
if (ref) {
|
|
copy = $(ref).children().clone().attr('visibility', 'hidden');
|
|
$(svgroot_).append(copy);
|
|
matched = copy.filter('line, path');
|
|
} else {
|
|
matched = $(selected).find('line, path');
|
|
}
|
|
|
|
let issue = false;
|
|
if (matched.length) {
|
|
matched.each(function () {
|
|
const bb = this.getBBox();
|
|
if (!bb.width || !bb.height) {
|
|
issue = true;
|
|
}
|
|
});
|
|
if (issue) {
|
|
const elems = ref ? copy : $(selected).children();
|
|
ret = getStrokedBBox(elems);
|
|
} else {
|
|
ret = selected.getBBox();
|
|
}
|
|
} else {
|
|
ret = selected.getBBox();
|
|
}
|
|
if (ref) {
|
|
copy.remove();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Get the given/selected element's bounding box object, convert it to be more
|
|
* usable when necessary.
|
|
* @function module:utilities.getBBox
|
|
* @param {Element} elem - Optional DOM element to get the BBox for
|
|
* @returns {module:utilities.BBoxObject} Bounding box object
|
|
*/
|
|
export const getBBox = function (elem) {
|
|
const selected = elem || editorContext_.geSelectedElements()[0];
|
|
if (elem.nodeType !== 1) { return null; }
|
|
const elname = selected.nodeName;
|
|
|
|
let ret = null;
|
|
switch (elname) {
|
|
case 'text':
|
|
if (selected.textContent === '') {
|
|
selected.textContent = 'a'; // Some character needed for the selector to use.
|
|
ret = selected.getBBox();
|
|
selected.textContent = '';
|
|
} else if (selected.getBBox) {
|
|
ret = selected.getBBox();
|
|
}
|
|
break;
|
|
case 'path':
|
|
if (!supportsPathBBox()) {
|
|
ret = getPathBBox(selected);
|
|
} else if (selected.getBBox) {
|
|
ret = selected.getBBox();
|
|
}
|
|
break;
|
|
case 'g':
|
|
case 'a':
|
|
ret = groupBBFix(selected);
|
|
break;
|
|
default:
|
|
|
|
if (elname === 'use') {
|
|
ret = groupBBFix(selected); // , true);
|
|
}
|
|
if (elname === 'use' || (elname === 'foreignObject' && isWebkit())) {
|
|
if (!ret) { ret = selected.getBBox(); }
|
|
// This is resolved in later versions of webkit, perhaps we should
|
|
// have a featured detection for correct 'use' behavior?
|
|
// ——————————
|
|
if (!isWebkit()) {
|
|
const bb = {};
|
|
bb.width = ret.width;
|
|
bb.height = ret.height;
|
|
bb.x = ret.x + parseFloat(selected.getAttribute('x') || 0);
|
|
bb.y = ret.y + parseFloat(selected.getAttribute('y') || 0);
|
|
ret = bb;
|
|
}
|
|
} else if (visElemsArr.includes(elname)) {
|
|
if (selected) {
|
|
try {
|
|
ret = selected.getBBox();
|
|
} catch (err) {
|
|
// tspan (and textPath apparently) have no `getBBox` in Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=937268
|
|
// Re: Chrome returning bbox for containing text element, see: https://bugs.chromium.org/p/chromium/issues/detail?id=349835
|
|
const extent = selected.getExtentOfChar(0); // pos+dimensions of the first glyph
|
|
const width = selected.getComputedTextLength(); // width of the tspan
|
|
ret = {
|
|
x: extent.x,
|
|
y: extent.y,
|
|
width,
|
|
height: extent.height
|
|
};
|
|
}
|
|
} else {
|
|
// Check if element is child of a foreignObject
|
|
const fo = $(selected).closest('foreignObject');
|
|
if (fo.length) {
|
|
if (fo[0].getBBox) {
|
|
ret = fo[0].getBBox();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (ret) {
|
|
ret = bboxToObj(ret);
|
|
}
|
|
|
|
// get the bounding box from the DOM (which is in that element's coordinate system)
|
|
return ret;
|
|
};
|
|
|
|
/**
|
|
* @typedef {GenericArray} module:utilities.PathSegmentArray
|
|
* @property {Integer} length 2
|
|
* @property {"M"|"L"|"C"|"Z"} 0
|
|
* @property {Float[]} 1
|
|
*/
|
|
|
|
/**
|
|
* Create a path 'd' attribute from path segments.
|
|
* Each segment is an array of the form: `[singleChar, [x,y, x,y, ...]]`
|
|
* @function module:utilities.getPathDFromSegments
|
|
* @param {module:utilities.PathSegmentArray[]} pathSegments - An array of path segments to be converted
|
|
* @returns {string} The converted path d attribute.
|
|
*/
|
|
export const getPathDFromSegments = function (pathSegments) {
|
|
let d = '';
|
|
|
|
$.each(pathSegments, function (j, [singleChar, pts]) {
|
|
d += singleChar;
|
|
for (let i = 0; i < pts.length; i += 2) {
|
|
d += (pts[i] + ',' + pts[i + 1]) + ' ';
|
|
}
|
|
});
|
|
|
|
return d;
|
|
};
|
|
|
|
/**
|
|
* Make a path 'd' attribute from a simple SVG element shape.
|
|
* @function module:utilities.getPathDFromElement
|
|
* @param {Element} elem - The element to be converted
|
|
* @returns {string} The path d attribute or `undefined` if the element type is unknown.
|
|
*/
|
|
export const getPathDFromElement = function (elem) {
|
|
// Possibly the cubed root of 6, but 1.81 works best
|
|
let num = 1.81;
|
|
let d, a, rx, ry;
|
|
switch (elem.tagName) {
|
|
case 'ellipse':
|
|
case 'circle': {
|
|
a = $(elem).attr(['rx', 'ry', 'cx', 'cy']);
|
|
const {cx, cy} = a;
|
|
({rx, ry} = a);
|
|
if (elem.tagName === 'circle') {
|
|
ry = $(elem).attr('r');
|
|
rx = ry;
|
|
}
|
|
|
|
d = getPathDFromSegments([
|
|
['M', [(cx - rx), (cy)]],
|
|
['C', [(cx - rx), (cy - ry / num), (cx - rx / num), (cy - ry), (cx), (cy - ry)]],
|
|
['C', [(cx + rx / num), (cy - ry), (cx + rx), (cy - ry / num), (cx + rx), (cy)]],
|
|
['C', [(cx + rx), (cy + ry / num), (cx + rx / num), (cy + ry), (cx), (cy + ry)]],
|
|
['C', [(cx - rx / num), (cy + ry), (cx - rx), (cy + ry / num), (cx - rx), (cy)]],
|
|
['Z', []]
|
|
]);
|
|
break;
|
|
} case 'path':
|
|
d = elem.getAttribute('d');
|
|
break;
|
|
case 'line':
|
|
a = $(elem).attr(['x1', 'y1', 'x2', 'y2']);
|
|
d = 'M' + a.x1 + ',' + a.y1 + 'L' + a.x2 + ',' + a.y2;
|
|
break;
|
|
case 'polyline':
|
|
d = 'M' + elem.getAttribute('points');
|
|
break;
|
|
case 'polygon':
|
|
d = 'M' + elem.getAttribute('points') + ' Z';
|
|
break;
|
|
case 'rect': {
|
|
const r = $(elem).attr(['rx', 'ry']);
|
|
({rx, ry} = r);
|
|
const b = elem.getBBox();
|
|
const {x, y} = b,
|
|
w = b.width,
|
|
h = b.height;
|
|
num = 4 - num; // Why? Because!
|
|
|
|
if (!rx && !ry) {
|
|
// Regular rect
|
|
d = getPathDFromSegments([
|
|
['M', [x, y]],
|
|
['L', [x + w, y]],
|
|
['L', [x + w, y + h]],
|
|
['L', [x, y + h]],
|
|
['L', [x, y]],
|
|
['Z', []]
|
|
]);
|
|
} else {
|
|
d = getPathDFromSegments([
|
|
['M', [x, y + ry]],
|
|
['C', [x, y + ry / num, x + rx / num, y, x + rx, y]],
|
|
['L', [x + w - rx, y]],
|
|
['C', [x + w - rx / num, y, x + w, y + ry / num, x + w, y + ry]],
|
|
['L', [x + w, y + h - ry]],
|
|
['C', [x + w, y + h - ry / num, x + w - rx / num, y + h, x + w - rx, y + h]],
|
|
['L', [x + rx, y + h]],
|
|
['C', [x + rx / num, y + h, x, y + h - ry / num, x, y + h - ry]],
|
|
['L', [x, y + ry]],
|
|
['Z', []]
|
|
]);
|
|
}
|
|
break;
|
|
} default:
|
|
break;
|
|
}
|
|
|
|
return d;
|
|
};
|
|
|
|
/**
|
|
* Get a set of attributes from an element that is useful for convertToPath.
|
|
* @function module:utilities.getExtraAttributesForConvertToPath
|
|
* @param {Element} elem - The element to be probed
|
|
* @returns {PlainObject.<"marker-start"|"marker-end"|"marker-mid"|"filter"|"clip-path", string>} An object with attributes.
|
|
*/
|
|
export const getExtraAttributesForConvertToPath = function (elem) {
|
|
const attrs = {};
|
|
// TODO: make this list global so that we can properly maintain it
|
|
// TODO: what about @transform, @clip-rule, @fill-rule, etc?
|
|
$.each(['marker-start', 'marker-end', 'marker-mid', 'filter', 'clip-path'], function () {
|
|
const a = elem.getAttribute(this);
|
|
if (a) {
|
|
attrs[this] = a;
|
|
}
|
|
});
|
|
return attrs;
|
|
};
|
|
|
|
/**
|
|
* Get the BBox of an element-as-path.
|
|
* @function module:utilities.getBBoxOfElementAsPath
|
|
* @param {Element} elem - The DOM element to be probed
|
|
* @param {module:utilities.EditorContext#addSVGElementFromJson} addSVGElementFromJson - Function to add the path element to the current layer. See canvas.addSVGElementFromJson
|
|
* @param {module:path.pathActions} pathActions - If a transform exists, `pathActions.resetOrientation()` is used. See: canvas.pathActions.
|
|
* @returns {DOMRect|false} The resulting path's bounding box object.
|
|
*/
|
|
export const getBBoxOfElementAsPath = function (elem, addSVGElementFromJson, pathActions) {
|
|
const path = addSVGElementFromJson({
|
|
element: 'path',
|
|
attr: getExtraAttributesForConvertToPath(elem)
|
|
});
|
|
|
|
const eltrans = elem.getAttribute('transform');
|
|
if (eltrans) {
|
|
path.setAttribute('transform', eltrans);
|
|
}
|
|
|
|
const {parentNode} = elem;
|
|
if (elem.nextSibling) {
|
|
elem.before(path);
|
|
} else {
|
|
parentNode.append(path);
|
|
}
|
|
|
|
const d = getPathDFromElement(elem);
|
|
if (d) {
|
|
path.setAttribute('d', d);
|
|
} else {
|
|
path.remove();
|
|
}
|
|
|
|
// Get the correct BBox of the new path, then discard it
|
|
pathActions.resetOrientation(path);
|
|
let bb = false;
|
|
try {
|
|
bb = path.getBBox();
|
|
} catch (e) {
|
|
// Firefox fails
|
|
}
|
|
path.remove();
|
|
return bb;
|
|
};
|
|
|
|
/**
|
|
* Convert selected element to a path.
|
|
* @function module:utilities.convertToPath
|
|
* @param {Element} elem - The DOM element to be converted
|
|
* @param {module:utilities.SVGElementJSON} attrs - Apply attributes to new path. see canvas.convertToPath
|
|
* @param {module:utilities.EditorContext#addSVGElementFromJson} addSVGElementFromJson - Function to add the path element to the current layer. See canvas.addSVGElementFromJson
|
|
* @param {module:path.pathActions} pathActions - If a transform exists, pathActions.resetOrientation() is used. See: canvas.pathActions.
|
|
* @param {module:draw.DrawCanvasInit#clearSelection|module:path.EditorContext#clearSelection} clearSelection - see [canvas.clearSelection]{@link module:svgcanvas.SvgCanvas#clearSelection}
|
|
* @param {module:path.EditorContext#addToSelection} addToSelection - see [canvas.addToSelection]{@link module:svgcanvas.SvgCanvas#addToSelection}
|
|
* @param {module:history} hstry - see history module
|
|
* @param {module:path.EditorContext#addCommandToHistory|module:draw.DrawCanvasInit#addCommandToHistory} addCommandToHistory - see [canvas.addCommandToHistory]{@link module:svgcanvas~addCommandToHistory}
|
|
* @returns {SVGPathElement|null} The converted path element or null if the DOM element was not recognized.
|
|
*/
|
|
export const convertToPath = function (elem, attrs, addSVGElementFromJson, pathActions, clearSelection, addToSelection, hstry, addCommandToHistory) {
|
|
const batchCmd = new hstry.BatchCommand('Convert element to Path');
|
|
|
|
// Any attribute on the element not covered by the passed-in attributes
|
|
attrs = $.extend({}, attrs, getExtraAttributesForConvertToPath(elem));
|
|
|
|
const path = addSVGElementFromJson({
|
|
element: 'path',
|
|
attr: attrs
|
|
});
|
|
|
|
const eltrans = elem.getAttribute('transform');
|
|
if (eltrans) {
|
|
path.setAttribute('transform', eltrans);
|
|
}
|
|
|
|
const {id} = elem;
|
|
const {parentNode} = elem;
|
|
if (elem.nextSibling) {
|
|
elem.before(path);
|
|
} else {
|
|
parentNode.append(path);
|
|
}
|
|
|
|
const d = getPathDFromElement(elem);
|
|
if (d) {
|
|
path.setAttribute('d', d);
|
|
|
|
// Replace the current element with the converted one
|
|
|
|
// Reorient if it has a matrix
|
|
if (eltrans) {
|
|
const tlist = getTransformList(path);
|
|
if (hasMatrixTransform(tlist)) {
|
|
pathActions.resetOrientation(path);
|
|
}
|
|
}
|
|
|
|
const {nextSibling} = elem;
|
|
batchCmd.addSubCommand(new hstry.RemoveElementCommand(elem, nextSibling, parent));
|
|
batchCmd.addSubCommand(new hstry.InsertElementCommand(path));
|
|
|
|
clearSelection();
|
|
elem.remove();
|
|
path.setAttribute('id', id);
|
|
path.removeAttribute('visibility');
|
|
addToSelection([path], true);
|
|
|
|
addCommandToHistory(batchCmd);
|
|
|
|
return path;
|
|
}
|
|
// the elem.tagName was not recognized, so no "d" attribute. Remove it, so we've haven't changed anything.
|
|
path.remove();
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Can the bbox be optimized over the native getBBox? The optimized bbox is the same as the native getBBox when
|
|
* the rotation angle is a multiple of 90 degrees and there are no complex transforms.
|
|
* Getting an optimized bbox can be dramatically slower, so we want to make sure it's worth it.
|
|
*
|
|
* The best example for this is a circle rotate 45 degrees. The circle doesn't get wider or taller when rotated
|
|
* about it's center.
|
|
*
|
|
* The standard, unoptimized technique gets the native bbox of the circle, rotates the box 45 degrees, uses
|
|
* that width and height, and applies any transforms to get the final bbox. This means the calculated bbox
|
|
* is much wider than the original circle. If the angle had been 0, 90, 180, etc. both techniques render the
|
|
* same bbox.
|
|
*
|
|
* The optimization is not needed if the rotation is a multiple 90 degrees. The default technique is to call
|
|
* getBBox then apply the angle and any transforms.
|
|
*
|
|
* @param {Float} angle - The rotation angle in degrees
|
|
* @param {boolean} hasAMatrixTransform - True if there is a matrix transform
|
|
* @returns {boolean} True if the bbox can be optimized.
|
|
*/
|
|
function bBoxCanBeOptimizedOverNativeGetBBox (angle, hasAMatrixTransform) {
|
|
const angleModulo90 = angle % 90;
|
|
const closeTo90 = angleModulo90 < -89.99 || angleModulo90 > 89.99;
|
|
const closeTo0 = angleModulo90 > -0.001 && angleModulo90 < 0.001;
|
|
return hasAMatrixTransform || !(closeTo0 || closeTo90);
|
|
}
|
|
|
|
/**
|
|
* Get bounding box that includes any transforms.
|
|
* @function module:utilities.getBBoxWithTransform
|
|
* @param {Element} elem - The DOM element to be converted
|
|
* @param {module:utilities.EditorContext#addSVGElementFromJson} addSVGElementFromJson - Function to add the path element to the current layer. See canvas.addSVGElementFromJson
|
|
* @param {module:path.pathActions} pathActions - If a transform exists, pathActions.resetOrientation() is used. See: canvas.pathActions.
|
|
* @returns {module:utilities.BBoxObject|module:math.TransformedBox|DOMRect} A single bounding box object
|
|
*/
|
|
export const getBBoxWithTransform = function (elem, addSVGElementFromJson, pathActions) {
|
|
// TODO: Fix issue with rotated groups. Currently they work
|
|
// fine in FF, but not in other browsers (same problem mentioned
|
|
// in Issue 339 comment #2).
|
|
|
|
let bb = getBBox(elem);
|
|
|
|
if (!bb) {
|
|
return null;
|
|
}
|
|
|
|
const tlist = getTransformList(elem);
|
|
const angle = getRotationAngleFromTransformList(tlist);
|
|
const hasMatrixXForm = hasMatrixTransform(tlist);
|
|
|
|
if (angle || hasMatrixXForm) {
|
|
let goodBb = false;
|
|
if (bBoxCanBeOptimizedOverNativeGetBBox(angle, hasMatrixXForm)) {
|
|
// Get the BBox from the raw path for these elements
|
|
// TODO: why ellipse and not circle
|
|
const elemNames = ['ellipse', 'path', 'line', 'polyline', 'polygon'];
|
|
if (elemNames.includes(elem.tagName)) {
|
|
goodBb = getBBoxOfElementAsPath(elem, addSVGElementFromJson, pathActions);
|
|
bb = goodBb;
|
|
} else if (elem.tagName === 'rect') {
|
|
// Look for radius
|
|
const rx = elem.getAttribute('rx');
|
|
const ry = elem.getAttribute('ry');
|
|
if (rx || ry) {
|
|
goodBb = getBBoxOfElementAsPath(elem, addSVGElementFromJson, pathActions);
|
|
bb = goodBb;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!goodBb) {
|
|
const {matrix} = transformListToTransform(tlist);
|
|
bb = transformBox(bb.x, bb.y, bb.width, bb.height, matrix).aabox;
|
|
|
|
// Old technique that was exceedingly slow with large documents.
|
|
//
|
|
// Accurate way to get BBox of rotated element in Firefox:
|
|
// Put element in group and get its BBox
|
|
//
|
|
// Must use clone else FF freaks out
|
|
// const clone = elem.cloneNode(true);
|
|
// const g = document.createElementNS(NS.SVG, 'g');
|
|
// const parent = elem.parentNode;
|
|
// parent.append(g);
|
|
// g.append(clone);
|
|
// const bb2 = bboxToObj(g.getBBox());
|
|
// g.remove();
|
|
}
|
|
}
|
|
return bb;
|
|
};
|
|
|
|
/**
|
|
* @param {Element} elem
|
|
* @returns {Float}
|
|
* @todo This is problematic with large stroke-width and, for example, a single
|
|
* horizontal line. The calculated BBox extends way beyond left and right sides.
|
|
*/
|
|
function getStrokeOffsetForBBox (elem) {
|
|
const sw = elem.getAttribute('stroke-width');
|
|
return (!isNaN(sw) && elem.getAttribute('stroke') !== 'none') ? sw / 2 : 0;
|
|
}
|
|
|
|
/**
|
|
* @typedef {PlainObject} BBox
|
|
* @property {Integer} x The x value
|
|
* @property {Integer} y The y value
|
|
* @property {Float} width
|
|
* @property {Float} height
|
|
*/
|
|
|
|
/**
|
|
* Get the bounding box for one or more stroked and/or transformed elements.
|
|
* @function module:utilities.getStrokedBBox
|
|
* @param {Element[]} elems - Array with DOM elements to check
|
|
* @param {module:utilities.EditorContext#addSVGElementFromJson} addSVGElementFromJson - Function to add the path element to the current layer. See canvas.addSVGElementFromJson
|
|
* @param {module:path.pathActions} pathActions - If a transform exists, pathActions.resetOrientation() is used. See: canvas.pathActions.
|
|
* @returns {module:utilities.BBoxObject|module:math.TransformedBox|DOMRect} A single bounding box object
|
|
*/
|
|
export const getStrokedBBox = function (elems, addSVGElementFromJson, pathActions) {
|
|
if (!elems || !elems.length) { return false; }
|
|
|
|
let fullBb;
|
|
$.each(elems, function () {
|
|
if (fullBb) { return; }
|
|
if (!this.parentNode) { return; }
|
|
fullBb = getBBoxWithTransform(this, addSVGElementFromJson, pathActions);
|
|
});
|
|
|
|
// This shouldn't ever happen...
|
|
if (fullBb === undefined) { return null; }
|
|
|
|
// fullBb doesn't include the stoke, so this does no good!
|
|
// if (elems.length == 1) return fullBb;
|
|
|
|
let maxX = fullBb.x + fullBb.width;
|
|
let maxY = fullBb.y + fullBb.height;
|
|
let minX = fullBb.x;
|
|
let minY = fullBb.y;
|
|
|
|
// If only one elem, don't call the potentially slow getBBoxWithTransform method again.
|
|
if (elems.length === 1) {
|
|
const offset = getStrokeOffsetForBBox(elems[0]);
|
|
minX -= offset;
|
|
minY -= offset;
|
|
maxX += offset;
|
|
maxY += offset;
|
|
} else {
|
|
$.each(elems, function (i, elem) {
|
|
const curBb = getBBoxWithTransform(elem, addSVGElementFromJson, pathActions);
|
|
if (curBb) {
|
|
const offset = getStrokeOffsetForBBox(elem);
|
|
minX = Math.min(minX, curBb.x - offset);
|
|
minY = Math.min(minY, curBb.y - offset);
|
|
// TODO: The old code had this test for max, but not min. I suspect this test should be for both min and max
|
|
if (elem.nodeType === 1) {
|
|
maxX = Math.max(maxX, curBb.x + curBb.width + offset);
|
|
maxY = Math.max(maxY, curBb.y + curBb.height + offset);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
fullBb.x = minX;
|
|
fullBb.y = minY;
|
|
fullBb.width = maxX - minX;
|
|
fullBb.height = maxY - minY;
|
|
return fullBb;
|
|
};
|
|
|
|
/**
|
|
* Get all elements that have a BBox (excludes `<defs>`, `<title>`, etc).
|
|
* Note that 0-opacity, off-screen etc elements are still considered "visible"
|
|
* for this function.
|
|
* @function module:utilities.getVisibleElements
|
|
* @param {Element} parentElement - The parent DOM element to search within
|
|
* @returns {Element[]} All "visible" elements.
|
|
*/
|
|
export const getVisibleElements = function (parentElement) {
|
|
if (!parentElement) {
|
|
parentElement = $(editorContext_.getSVGContent()).children(); // Prevent layers from being included
|
|
}
|
|
|
|
const contentElems = [];
|
|
$(parentElement).children().each(function (i, elem) {
|
|
if (elem.getBBox) {
|
|
contentElems.push(elem);
|
|
}
|
|
});
|
|
return contentElems.reverse();
|
|
};
|
|
|
|
/**
|
|
* Get the bounding box for one or more stroked and/or transformed elements.
|
|
* @function module:utilities.getStrokedBBoxDefaultVisible
|
|
* @param {Element[]} elems - Array with DOM elements to check
|
|
* @returns {module:utilities.BBoxObject} A single bounding box object
|
|
*/
|
|
export const getStrokedBBoxDefaultVisible = function (elems) {
|
|
if (!elems) { elems = getVisibleElements(); }
|
|
return getStrokedBBox(
|
|
elems,
|
|
editorContext_.addSVGElementFromJson,
|
|
editorContext_.pathActions
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Get the rotation angle of the given transform list.
|
|
* @function module:utilities.getRotationAngleFromTransformList
|
|
* @param {SVGTransformList} tlist - List of transforms
|
|
* @param {boolean} toRad - When true returns the value in radians rather than degrees
|
|
* @returns {Float} The angle in degrees or radians
|
|
*/
|
|
export const getRotationAngleFromTransformList = function (tlist, toRad) {
|
|
if (!tlist) { return 0; } // <svg> elements have no tlist
|
|
const N = tlist.numberOfItems;
|
|
for (let i = 0; i < N; ++i) {
|
|
const xform = tlist.getItem(i);
|
|
if (xform.type === 4) {
|
|
return toRad ? xform.angle * Math.PI / 180.0 : xform.angle;
|
|
}
|
|
}
|
|
return 0.0;
|
|
};
|
|
|
|
/**
|
|
* Get the rotation angle of the given/selected DOM element.
|
|
* @function module:utilities.getRotationAngle
|
|
* @param {Element} [elem] - DOM element to get the angle for. Default to first of selected elements.
|
|
* @param {boolean} [toRad=false] - When true returns the value in radians rather than degrees
|
|
* @returns {Float} The angle in degrees or radians
|
|
*/
|
|
export let getRotationAngle = function (elem, toRad) { // eslint-disable-line import/no-mutable-exports
|
|
const selected = elem || editorContext_.getSelectedElements()[0];
|
|
// find the rotation transform (if any) and set it
|
|
const tlist = getTransformList(selected);
|
|
return getRotationAngleFromTransformList(tlist, toRad);
|
|
};
|
|
|
|
/**
|
|
* Get the reference element associated with the given attribute value.
|
|
* @function module:utilities.getRefElem
|
|
* @param {string} attrVal - The attribute value as a string
|
|
* @returns {Element} Reference element
|
|
*/
|
|
export const getRefElem = function (attrVal) {
|
|
return getElem(getUrlFromAttr(attrVal).substr(1));
|
|
};
|
|
|
|
/**
|
|
* Get a DOM element by ID within the SVG root element.
|
|
* @function module:utilities.getElem
|
|
* @param {string} id - String with the element's new ID
|
|
* @returns {?Element}
|
|
*/
|
|
export const getElem = (supportsSelectors())
|
|
? function (id) {
|
|
// querySelector lookup
|
|
return svgroot_.querySelector('#' + id);
|
|
}
|
|
: supportsXpath()
|
|
? function (id) {
|
|
// xpath lookup
|
|
return domdoc_.evaluate(
|
|
'svg:svg[@id="svgroot"]//svg:*[@id="' + id + '"]',
|
|
domcontainer_,
|
|
function () { return NS.SVG; },
|
|
9,
|
|
null
|
|
).singleNodeValue;
|
|
}
|
|
: function (id) {
|
|
// jQuery lookup: twice as slow as xpath in FF
|
|
return $(svgroot_).find('[id=' + id + ']')[0];
|
|
};
|
|
|
|
/**
|
|
* Assigns multiple attributes to an element.
|
|
* @function module:utilities.assignAttributes
|
|
* @param {Element} elem - DOM element to apply new attribute values to
|
|
* @param {PlainObject.<string, string>} attrs - Object with attribute keys/values
|
|
* @param {Integer} [suspendLength] - Milliseconds to suspend redraw
|
|
* @param {boolean} [unitCheck=false] - Boolean to indicate the need to use units.setUnitAttr
|
|
* @returns {void}
|
|
*/
|
|
export const assignAttributes = function (elem, attrs, suspendLength, unitCheck) {
|
|
for (const [key, value] of Object.entries(attrs)) {
|
|
const ns = (key.substr(0, 4) === 'xml:'
|
|
? NS.XML
|
|
: key.substr(0, 6) === 'xlink:' ? NS.XLINK : null);
|
|
|
|
if (ns) {
|
|
elem.setAttributeNS(ns, key, value);
|
|
} else if (!unitCheck) {
|
|
elem.setAttribute(key, value);
|
|
} else {
|
|
setUnitAttr(elem, key, value);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Remove unneeded (default) attributes, making resulting SVG smaller.
|
|
* @function module:utilities.cleanupElement
|
|
* @param {Element} element - DOM element to clean up
|
|
* @returns {void}
|
|
*/
|
|
export const cleanupElement = function (element) {
|
|
const defaults = {
|
|
'fill-opacity': 1,
|
|
'stop-opacity': 1,
|
|
opacity: 1,
|
|
stroke: 'none',
|
|
'stroke-dasharray': 'none',
|
|
'stroke-linejoin': 'miter',
|
|
'stroke-linecap': 'butt',
|
|
'stroke-opacity': 1,
|
|
'stroke-width': 1,
|
|
rx: 0,
|
|
ry: 0
|
|
};
|
|
|
|
if (element.nodeName === 'ellipse') {
|
|
// Ellipse elements require rx and ry attributes
|
|
delete defaults.rx;
|
|
delete defaults.ry;
|
|
}
|
|
|
|
Object.entries(defaults).forEach(([attr, val]) => {
|
|
if (element.getAttribute(attr) === String(val)) {
|
|
element.removeAttribute(attr);
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Round value to for snapping.
|
|
* @function module:utilities.snapToGrid
|
|
* @param {Float} value
|
|
* @returns {Integer}
|
|
*/
|
|
export const snapToGrid = function (value) {
|
|
const unit = editorContext_.getBaseUnit();
|
|
let stepSize = editorContext_.getSnappingStep();
|
|
if (unit !== 'px') {
|
|
stepSize *= getTypeMap()[unit];
|
|
}
|
|
value = Math.round(value / stepSize) * stepSize;
|
|
return value;
|
|
};
|
|
|
|
/**
|
|
* Escapes special characters in a regular expression.
|
|
* @function module:utilities.regexEscape
|
|
* @param {string} str
|
|
* @returns {string}
|
|
*/
|
|
export const regexEscape = function (str) {
|
|
// From: http://phpjs.org/functions
|
|
return String(str).replace(new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\-]', 'g'), '\\$&');
|
|
};
|
|
|
|
/**
|
|
* Prevents default browser click behaviour on the given element.
|
|
* @function module:utilities.preventClickDefault
|
|
* @param {Element} img - The DOM element to prevent the click on
|
|
* @returns {void}
|
|
*/
|
|
export const preventClickDefault = function (img) {
|
|
$(img).click(function (e) { e.preventDefault(); });
|
|
};
|
|
|
|
/**
|
|
* @callback module:utilities.GetNextID
|
|
* @returns {string} The ID
|
|
*/
|
|
/**
|
|
* Create a clone of an element, updating its ID and its children's IDs when needed.
|
|
* @function module:utilities.copyElem
|
|
* @param {Element} el - DOM element to clone
|
|
* @param {module:utilities.GetNextID} getNextId - The getter of the next unique ID.
|
|
* @returns {Element} The cloned element
|
|
*/
|
|
export const copyElem = function (el, getNextId) {
|
|
// manually create a copy of the element
|
|
const newEl = document.createElementNS(el.namespaceURI, el.nodeName);
|
|
$.each(el.attributes, function (i, attr) {
|
|
if (attr.localName !== '-moz-math-font-style') {
|
|
newEl.setAttributeNS(attr.namespaceURI, attr.nodeName, attr.value);
|
|
}
|
|
});
|
|
// set the copied element's new id
|
|
newEl.removeAttribute('id');
|
|
newEl.id = getNextId();
|
|
|
|
// Opera's "d" value needs to be reset for Opera/Win/non-EN
|
|
// Also needed for webkit (else does not keep curved segments on clone)
|
|
if (isWebkit() && el.nodeName === 'path') {
|
|
const fixedD = convertPath(el);
|
|
newEl.setAttribute('d', fixedD);
|
|
}
|
|
|
|
// now create copies of all children
|
|
$.each(el.childNodes, function (i, child) {
|
|
switch (child.nodeType) {
|
|
case 1: // element node
|
|
newEl.append(copyElem(child, getNextId));
|
|
break;
|
|
case 3: // text node
|
|
newEl.textContent = child.nodeValue;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
});
|
|
|
|
if ($(el).data('gsvg')) {
|
|
$(newEl).data('gsvg', newEl.firstChild);
|
|
} else if ($(el).data('symbol')) {
|
|
const ref = $(el).data('symbol');
|
|
$(newEl).data('ref', ref).data('symbol', ref);
|
|
} else if (newEl.tagName === 'image') {
|
|
preventClickDefault(newEl);
|
|
}
|
|
|
|
return newEl;
|
|
};
|
|
|
|
/**
|
|
* Whether a value is `null` or `undefined`.
|
|
* @param {Any} val
|
|
* @returns {boolean}
|
|
*/
|
|
export const isNullish = (val) => {
|
|
return val === null || val === undefined;
|
|
};
|
|
|
|
/**
|
|
* Overwrite methods for unit testing.
|
|
* @function module:utilities.mock
|
|
* @param {PlainObject} mockMethods
|
|
* @returns {void}
|
|
*/
|
|
export const mock = ({
|
|
getHref: getHrefUser, setHref: setHrefUser, getRotationAngle: getRotationAngleUser
|
|
}) => {
|
|
getHref = getHrefUser;
|
|
setHref = setHrefUser;
|
|
getRotationAngle = getRotationAngleUser;
|
|
};
|