1225 lines
39 KiB
JavaScript
1225 lines
39 KiB
JavaScript
/**
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* Miscellaneous utilities.
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* @module utilities
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* @license MIT
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*
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* @copyright 2010 Alexis Deveria, 2010 Jeff Schiller
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*/
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import { NS } from './namespaces.js'
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import { setUnitAttr, getTypeMap } from './units.js'
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import {
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hasMatrixTransform, transformListToTransform, transformBox
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} from './math.js'
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import { getClosest, mergeDeep } from '../../src/common/util.js'
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// Much faster than running getBBox() every time
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const visElems = 'a,circle,ellipse,foreignObject,g,image,line,path,polygon,polyline,rect,svg,text,tspan,use,clipPath'
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const visElemsArr = visElems.split(',')
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// const hidElems = 'defs,desc,feGaussianBlur,filter,linearGradient,marker,mask,metadata,pattern,radialGradient,stop,switch,symbol,title,textPath';
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let svgCanvas = null
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let svgroot_ = null
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/**
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* Object with the following keys/values.
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* @typedef {PlainObject} module:utilities.SVGElementJSON
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* @property {string} element - Tag name of the SVG element to create
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* @property {PlainObject<string, string>} attr - Has key-value attributes to assign to the new element.
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* An `id` should be set so that {@link module:utilities.EditorContext#addSVGElementsFromJson} can later re-identify the element for modification or replacement.
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* @property {boolean} [curStyles=false] - Indicates whether current style attributes should be applied first
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* @property {module:utilities.SVGElementJSON[]} [children] - Data objects to be added recursively as children
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* @property {string} [namespace="http://www.w3.org/2000/svg"] - Indicate a (non-SVG) namespace
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*/
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/**
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* An object that creates SVG elements for the canvas.
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*
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* @interface module:utilities.EditorContext
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* @property {module:path.pathActions} pathActions
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*/
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/**
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* @function module:utilities.EditorContext#getSvgContent
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* @returns {SVGSVGElement}
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*/
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/**
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* Create a new SVG element based on the given object keys/values and add it
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* to the current layer.
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* The element will be run through `cleanupElement` before being returned.
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* @function module:utilities.EditorContext#addSVGElementsFromJson
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* @param {module:utilities.SVGElementJSON} data
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* @returns {Element} The new element
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*/
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/**
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* @function module:utilities.EditorContext#getSelectedElements
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* @returns {Element[]} the array with selected DOM elements
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*/
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/**
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* @function module:utilities.EditorContext#getDOMDocument
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* @returns {HTMLDocument}
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*/
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/**
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* @function module:utilities.EditorContext#getDOMContainer
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* @returns {HTMLElement}
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*/
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/**
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* @function module:utilities.EditorContext#getSvgRoot
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* @returns {SVGSVGElement}
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*/
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/**
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* @function module:utilities.EditorContext#getBaseUnit
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* @returns {string}
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*/
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/**
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* @function module:utilities.EditorContext#getSnappingStep
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* @returns {Float|string}
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*/
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/**
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* @function module:utilities.init
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* @param {module:utilities.EditorContext} canvas
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* @returns {void}
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*/
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export const init = (canvas) => {
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svgCanvas = canvas
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svgroot_ = canvas.getSvgRoot()
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}
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/**
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* Used to prevent the [Billion laughs attack]{@link https://en.wikipedia.org/wiki/Billion_laughs_attack}.
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* @function module:utilities.dropXMLInternalSubset
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* @param {string} str String to be processed
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* @returns {string} The string with entity declarations in the internal subset removed
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* @todo This might be needed in other places `parseFromString` is used even without LGTM flagging
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*/
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export const dropXMLInternalSubset = (str) => {
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return str.replace(/(<!DOCTYPE\s+\w*\s*\[).*(\?]>)/, '$1$2')
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// return str.replace(/(?<doctypeOpen><!DOCTYPE\s+\w*\s*\[).*(?<doctypeClose>\?\]>)/, '$<doctypeOpen>$<doctypeClose>');
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}
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/**
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* Converts characters in a string to XML-friendly entities.
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* @function module:utilities.toXml
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* @example `&` becomes `&`
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* @param {string} str - The string to be converted
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* @returns {string} The converted string
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*/
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export const toXml = (str) => {
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// ' is ok in XML, but not HTML
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// > does not normally need escaping, though it can if within a CDATA expression (and preceded by "]]")
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return str
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''') // Note: `'` is XML only
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}
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// This code was written by Tyler Akins and has been placed in the
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// public domain. It would be nice if you left this header intact.
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// Base64 code from Tyler Akins -- http://rumkin.com
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// schiller: Removed string concatenation in favour of Array.join() optimization,
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// also precalculate the size of the array needed.
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/**
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* Converts a string to base64.
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* @function module:utilities.encode64
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* @param {string} input
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* @returns {string} Base64 output
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*/
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export function encode64 (input) {
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// base64 strings are 4/3 larger than the original string
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input = encodeUTF8(input) // convert non-ASCII characters
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return window.btoa(input) // Use native if available
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}
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/**
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* Converts a string from base64.
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* @function module:utilities.decode64
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* @param {string} input Base64-encoded input
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* @returns {string} Decoded output
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*/
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export function decode64 (input) {
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return decodeUTF8(window.atob(input))
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}
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/**
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* Compute a hashcode from a given string
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* @param word : the string, we want to compute the hashcode
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* @returns {number}: Hascode of the given string
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*/
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export function hashCode (word) {
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let hash = 0
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let chr
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if (word.length === 0) return hash
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for (let i = 0; i < word.length; i++) {
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chr = word.charCodeAt(i)
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hash = ((hash << 5) - hash) + chr
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hash |= 0 // Convert to 32bit integer
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}
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return hash
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}
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/**
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* @function module:utilities.decodeUTF8
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* @param {string} argString
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* @returns {string}
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*/
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export function decodeUTF8 (argString) {
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return decodeURIComponent(escape(argString))
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}
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// codedread:does not seem to work with webkit-based browsers on OSX // Brettz9: please test again as function upgraded
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/**
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* @function module:utilities.encodeUTF8
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* @param {string} argString
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* @returns {string}
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*/
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export const encodeUTF8 = (argString) => {
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return unescape(encodeURIComponent(argString))
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}
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/**
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* Convert dataURL to object URL.
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* @function module:utilities.dataURLToObjectURL
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* @param {string} dataurl
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* @returns {string} object URL or empty string
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*/
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export const dataURLToObjectURL = (dataurl) => {
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if (typeof Uint8Array === 'undefined' || typeof Blob === 'undefined' || typeof URL === 'undefined' || !URL.createObjectURL) {
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return ''
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}
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const arr = dataurl.split(',')
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const mime = arr[0].match(/:(.*?);/)[1]
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const bstr = atob(arr[1])
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/*
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const [prefix, suffix] = dataurl.split(','),
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{groups: {mime}} = prefix.match(/:(?<mime>.*?);/),
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bstr = atob(suffix);
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*/
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let n = bstr.length
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const u8arr = new Uint8Array(n)
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while (n--) {
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u8arr[n] = bstr.charCodeAt(n)
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}
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const blob = new Blob([u8arr], { type: mime })
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return URL.createObjectURL(blob)
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}
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/**
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* Get object URL for a blob object.
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* @function module:utilities.createObjectURL
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* @param {Blob} blob A Blob object or File object
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* @returns {string} object URL or empty string
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*/
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export const createObjectURL = (blob) => {
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if (!blob || typeof URL === 'undefined' || !URL.createObjectURL) {
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return ''
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}
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return URL.createObjectURL(blob)
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}
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/**
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* @property {string} blankPageObjectURL
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*/
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export const blankPageObjectURL = (() => {
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if (typeof Blob === 'undefined') {
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return ''
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}
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const blob = new Blob(['<html><head><title>SVG-edit</title></head><body> </body></html>'], { type: 'text/html' })
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return createObjectURL(blob)
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})()
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/**
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* Converts a string to use XML references (for non-ASCII).
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* @function module:utilities.convertToXMLReferences
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* @param {string} input
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* @returns {string} Decimal numeric character references
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*/
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export const convertToXMLReferences = (input) => {
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let output = '';
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[...input].forEach((ch) => {
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const c = ch.charCodeAt()
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output += (c <= 127) ? ch : `&#${c};`
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})
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return output
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}
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/**
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* Cross-browser compatible method of converting a string to an XML tree.
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* Found this function [here]{@link http://groups.google.com/group/jquery-dev/browse_thread/thread/c6d11387c580a77f}.
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* @function module:utilities.text2xml
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* @param {string} sXML
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* @throws {Error}
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* @returns {XMLDocument}
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*/
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export const text2xml = (sXML) => {
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if (sXML.includes('<svg:svg')) {
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sXML = sXML.replace(/<(\/?)svg:/g, '<$1').replace('xmlns:svg', 'xmlns')
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}
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let out; let dXML
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try {
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dXML = new DOMParser()
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dXML.async = false
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} catch (e) {
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throw new Error('XML Parser could not be instantiated')
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}
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try {
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out = dXML.parseFromString(sXML, 'text/xml')
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} catch (e2) { throw new Error('Error parsing XML string') }
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return out
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}
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/**
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* @typedef {PlainObject} module:utilities.BBoxObject (like `DOMRect`)
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* @property {Float} x
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* @property {Float} y
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* @property {Float} width
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* @property {Float} height
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*/
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/**
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* Converts a `SVGRect` into an object.
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* @function module:utilities.bboxToObj
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* @param {SVGRect} bbox - a SVGRect
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* @returns {module:utilities.BBoxObject} An object with properties names x, y, width, height.
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*/
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export const bboxToObj = ({ x, y, width, height }) => {
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return { x, y, width, height }
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}
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/**
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* @callback module:utilities.TreeWalker
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* @param {Element} elem - DOM element being traversed
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* @returns {void}
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*/
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/**
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* Walks the tree and executes the callback on each element in a top-down fashion.
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* @function module:utilities.walkTree
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* @param {Element} elem - DOM element to traverse
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* @param {module:utilities.TreeWalker} cbFn - Callback function to run on each element
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* @returns {void}
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*/
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export const walkTree = (elem, cbFn) => {
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if (elem?.nodeType === 1) {
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cbFn(elem)
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let i = elem.childNodes.length
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while (i--) {
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walkTree(elem.childNodes.item(i), cbFn)
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}
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}
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}
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/**
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* Walks the tree and executes the callback on each element in a depth-first fashion.
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* @function module:utilities.walkTreePost
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* @todo Shouldn't this be calling walkTreePost?
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* @param {Element} elem - DOM element to traverse
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* @param {module:utilities.TreeWalker} cbFn - Callback function to run on each element
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* @returns {void}
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*/
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export const walkTreePost = (elem, cbFn) => {
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if (elem?.nodeType === 1) {
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let i = elem.childNodes.length
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while (i--) {
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walkTree(elem.childNodes.item(i), cbFn)
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}
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cbFn(elem)
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}
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}
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/**
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* Extracts the URL from the `url(...)` syntax of some attributes.
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* Three variants:
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* - `<circle fill="url(someFile.svg#foo)" />`
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* - `<circle fill="url('someFile.svg#foo')" />`
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* - `<circle fill='url("someFile.svg#foo")' />`
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* @function module:utilities.getUrlFromAttr
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* @param {string} attrVal The attribute value as a string
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* @returns {string} String with just the URL, like "someFile.svg#foo"
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*/
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export const getUrlFromAttr = function (attrVal) {
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if (attrVal) {
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// url('#somegrad')
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if (attrVal.startsWith('url("')) {
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return attrVal.substring(5, attrVal.indexOf('"', 6))
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}
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// url('#somegrad')
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if (attrVal.startsWith("url('")) {
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return attrVal.substring(5, attrVal.indexOf("'", 6))
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}
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if (attrVal.startsWith('url(')) {
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return attrVal.substring(4, attrVal.indexOf(')'))
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}
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}
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return null
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}
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/**
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* @function module:utilities.getHref
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* @param {Element} elem
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* @returns {string} The given element's `xlink:href` value
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*/
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export let getHref = function (elem) {
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return elem.getAttributeNS(NS.XLINK, 'href')
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}
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/**
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* Sets the given element's `xlink:href` value.
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* @function module:utilities.setHref
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* @param {Element} elem
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* @param {string} val
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* @returns {void}
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*/
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export let setHref = function (elem, val) {
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elem.setAttributeNS(NS.XLINK, 'xlink:href', val)
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}
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/**
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* @function module:utilities.findDefs
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* @returns {SVGDefsElement} The document's `<defs>` element, creating it first if necessary
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*/
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export const findDefs = function () {
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const svgElement = svgCanvas.getSvgContent()
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let defs = svgElement.getElementsByTagNameNS(NS.SVG, 'defs')
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if (defs.length > 0) {
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defs = defs[0]
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} else {
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defs = svgElement.ownerDocument.createElementNS(NS.SVG, 'defs')
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if (svgElement.firstChild) {
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// first child is a comment, so call nextSibling
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svgElement.insertBefore(defs, svgElement.firstChild.nextSibling)
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// svgElement.firstChild.nextSibling.before(defs); // Not safe
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} else {
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svgElement.append(defs)
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}
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}
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return defs
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}
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// TODO(codedread): Consider moving the next to functions to bbox.js
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/**
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* Get correct BBox for a path in Webkit.
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* Converted from code found [here]{@link http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html}.
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* @function module:utilities.getPathBBox
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* @param {SVGPathElement} path - The path DOM element to get the BBox for
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* @returns {module:utilities.BBoxObject} A BBox-like object
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*/
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export const getPathBBox = function (path) {
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const seglist = path.pathSegList
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const tot = seglist.numberOfItems
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const bounds = [[], []]
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const start = seglist.getItem(0)
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let P0 = [start.x, start.y]
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const getCalc = function (j, P1, P2, P3) {
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return function (t) {
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return 1 - t ** 3 * P0[j] +
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3 * 1 - t ** 2 * t * P1[j] +
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3 * (1 - t) * t ** 2 * P2[j] +
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t ** 3 * P3[j]
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}
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}
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for (let i = 0; i < tot; i++) {
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const seg = seglist.getItem(i)
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if (seg.x === undefined) { continue }
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// Add actual points to limits
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bounds[0].push(P0[0])
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bounds[1].push(P0[1])
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if (seg.x1) {
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const P1 = [seg.x1, seg.y1]
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const P2 = [seg.x2, seg.y2]
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const P3 = [seg.x, seg.y]
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for (let j = 0; j < 2; j++) {
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const calc = getCalc(j, P1, P2, P3)
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const b = 6 * P0[j] - 12 * P1[j] + 6 * P2[j]
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const a = -3 * P0[j] + 9 * P1[j] - 9 * P2[j] + 3 * P3[j]
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const c = 3 * P1[j] - 3 * P0[j]
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if (a === 0) {
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if (b === 0) { continue }
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const t = -c / b
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if (t > 0 && t < 1) {
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bounds[j].push(calc(t))
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}
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continue
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}
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const b2ac = b ** 2 - 4 * c * a
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if (b2ac < 0) { continue }
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const t1 = (-b + Math.sqrt(b2ac)) / (2 * a)
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if (t1 > 0 && t1 < 1) { bounds[j].push(calc(t1)) }
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const t2 = (-b - Math.sqrt(b2ac)) / (2 * a)
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if (t2 > 0 && t2 < 1) { bounds[j].push(calc(t2)) }
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}
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P0 = P3
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} else {
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bounds[0].push(seg.x)
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bounds[1].push(seg.y)
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}
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}
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const x = Math.min.apply(null, bounds[0])
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const w = Math.max.apply(null, bounds[0]) - x
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const y = Math.min.apply(null, bounds[1])
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const h = Math.max.apply(null, bounds[1]) - y
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return {
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x,
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y,
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width: w,
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height: h
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}
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}
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/**
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* Get the given/selected element's bounding box object, convert it to be more
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* usable when necessary.
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* @function module:utilities.getBBox
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* @param {Element} elem - Optional DOM element to get the BBox for
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* @returns {module:utilities.BBoxObject} Bounding box object
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*/
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export const getBBox = function (elem) {
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const selected = elem || svgCanvas.getSelectedElements()[0]
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if (elem.nodeType !== 1) { return null }
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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':
|
|
case 'g':
|
|
case 'a':
|
|
if (selected.getBBox) {
|
|
ret = selected.getBBox()
|
|
}
|
|
break
|
|
default:
|
|
|
|
if (elname === 'use') {
|
|
ret = selected.getBBox() // , true);
|
|
} 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 = getClosest(selected.parentNode, 'foreignObject')
|
|
if (fo.length && 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 = ''
|
|
|
|
pathSegments.forEach(function ([singleChar, pts], _j) {
|
|
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; let rx; let ry
|
|
switch (elem.tagName) {
|
|
case 'ellipse':
|
|
case 'circle': {
|
|
rx = Number(elem.getAttribute('rx'))
|
|
ry = Number(elem.getAttribute('ry'))
|
|
const cx = Number(elem.getAttribute('cx'))
|
|
const cy = Number(elem.getAttribute('cy'))
|
|
if (elem.tagName === 'circle' && elem.hasAttribute('r')) {
|
|
ry = Number(elem.getAttribute('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': {
|
|
const x1 = elem.getAttribute('x1')
|
|
const y1 = elem.getAttribute('y1')
|
|
const x2 = elem.getAttribute('x2')
|
|
const y2 = elem.getAttribute('y2')
|
|
d = 'M' + x1 + ',' + y1 + 'L' + x2 + ',' + y2
|
|
}
|
|
break
|
|
case 'polyline':
|
|
d = 'M' + elem.getAttribute('points')
|
|
break
|
|
case 'polygon':
|
|
d = 'M' + elem.getAttribute('points') + ' Z'
|
|
break
|
|
case 'rect': {
|
|
rx = Number(elem.getAttribute('rx'))
|
|
ry = Number(elem.getAttribute('ry'))
|
|
const b = elem.getBBox()
|
|
const { x, y } = b
|
|
const w = b.width
|
|
const h = b.height
|
|
num = 4 - num // Why? Because!
|
|
|
|
d = (!rx && !ry)
|
|
// Regular rect
|
|
? getPathDFromSegments([
|
|
['M', [x, y]],
|
|
['L', [x + w, y]],
|
|
['L', [x + w, y + h]],
|
|
['L', [x, y + h]],
|
|
['L', [x, y]],
|
|
['Z', []]
|
|
])
|
|
: 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?
|
|
['marker-start', 'marker-end', 'marker-mid', 'filter', 'clip-path'].forEach(function (item) {
|
|
const a = elem.getAttribute(item)
|
|
if (a) {
|
|
attrs[item] = 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#addSVGElementsFromJson} addSVGElementsFromJson - Function to add the path element to the current layer. See canvas.addSVGElementsFromJson
|
|
* @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, addSVGElementsFromJson, pathActions) {
|
|
const path = addSVGElementsFromJson({
|
|
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#addSVGElementsFromJson} addSVGElementsFromJson - Function to add the path element to the current layer. See canvas.addSVGElementsFromJson
|
|
* @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 = (elem, attrs, svgCanvas) => {
|
|
const batchCmd = new svgCanvas.history.BatchCommand('Convert element to Path')
|
|
|
|
// Any attribute on the element not covered by the passed-in attributes
|
|
attrs = mergeDeep(attrs, getExtraAttributesForConvertToPath(elem))
|
|
|
|
const path = svgCanvas.addSVGElementsFromJson({
|
|
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 = path.transform.baseVal
|
|
if (hasMatrixTransform(tlist)) {
|
|
svgCanvas.pathActions.resetOrientation(path)
|
|
}
|
|
}
|
|
|
|
const { nextSibling } = elem
|
|
batchCmd.addSubCommand(new svgCanvas.history.RemoveElementCommand(elem, nextSibling, elem.parentNode))
|
|
svgCanvas.clearSelection()
|
|
elem.remove() // We need to remove this element otherwise the nextSibling of 'path' won't be null and an exception will be thrown after subsequent undo and redos.
|
|
|
|
batchCmd.addSubCommand(new svgCanvas.history.InsertElementCommand(path))
|
|
path.setAttribute('id', id)
|
|
path.removeAttribute('visibility')
|
|
svgCanvas.addToSelection([path], true)
|
|
|
|
svgCanvas.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#addSVGElementsFromJson} addSVGElementsFromJson - Function to add the path element to the current layer. See canvas.addSVGElementsFromJson
|
|
* @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, addSVGElementsFromJson, 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 = elem.transform.baseVal
|
|
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, addSVGElementsFromJson, pathActions)
|
|
bb = goodBb
|
|
} else if (elem.tagName === 'rect') {
|
|
// Look for radius
|
|
const rx = Number(elem.getAttribute('rx'))
|
|
const ry = Number(elem.getAttribute('ry'))
|
|
if (rx || ry) {
|
|
goodBb = getBBoxOfElementAsPath(elem, addSVGElementsFromJson, pathActions)
|
|
bb = goodBb
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!goodBb) {
|
|
const { matrix } = transformListToTransform(tlist)
|
|
bb = transformBox(bb.x, bb.y, bb.width, bb.height, matrix).aabox
|
|
}
|
|
}
|
|
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.
|
|
*/
|
|
const 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#addSVGElementsFromJson} addSVGElementsFromJson - Function to add the path element to the current layer. See canvas.addSVGElementsFromJson
|
|
* @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 = (elems, addSVGElementsFromJson, pathActions) => {
|
|
if (!elems || !elems.length) { return false }
|
|
|
|
let fullBb
|
|
elems.forEach((elem) => {
|
|
if (fullBb) { return }
|
|
if (!elem.parentNode) { return }
|
|
fullBb = getBBoxWithTransform(elem, addSVGElementsFromJson, pathActions)
|
|
})
|
|
|
|
// This shouldn't ever happen...
|
|
if (!fullBb) { 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 {
|
|
elems.forEach((elem) => {
|
|
const curBb = getBBoxWithTransform(elem, addSVGElementsFromJson, 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 = (parentElement) => {
|
|
if (!parentElement) {
|
|
const svgContent = svgCanvas.getSvgContent()
|
|
for (let i = 0; i < svgContent.children.length; i++) {
|
|
if (svgContent.children[i].getBBox) {
|
|
const bbox = svgContent.children[i].getBBox()
|
|
if (bbox.width !== 0 && bbox.height !== 0 && bbox.width !== 0 && bbox.height !== 0) {
|
|
parentElement = svgContent.children[i]
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
const contentElems = []
|
|
if (parentElement) {
|
|
const children = parentElement.children
|
|
// eslint-disable-next-line array-callback-return
|
|
Array.from(children, (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 = (elems) => {
|
|
if (!elems) { elems = getVisibleElements() }
|
|
return getStrokedBBox(
|
|
elems,
|
|
svgCanvas.addSVGElementsFromJson,
|
|
svgCanvas.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 = (tlist, toRad) => {
|
|
if (!tlist) { return 0 } // <svg> element have no tlist
|
|
for (let i = 0; i < tlist.numberOfItems; ++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 = (elem, toRad) => {
|
|
const selected = elem || svgCanvas.getSelectedElements()[0]
|
|
// find the rotation transform (if any) and set it
|
|
const tlist = selected.transform?.baseVal
|
|
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 = (attrVal) => {
|
|
return getElement(getUrlFromAttr(attrVal).substr(1))
|
|
}
|
|
/**
|
|
* Get the reference element associated with the given attribute value.
|
|
* @function module:utilities.getFeGaussianBlur
|
|
* @param {any} Element
|
|
* @returns {any} Reference element
|
|
*/
|
|
export const getFeGaussianBlur = (ele) => {
|
|
if (ele?.firstChild?.tagName === 'feGaussianBlur') {
|
|
return ele.firstChild
|
|
} else {
|
|
const childrens = ele.children
|
|
// eslint-disable-next-line no-unused-vars
|
|
for (const [_, value] of Object.entries(childrens)) {
|
|
if (value.tagName === 'feGaussianBlur') {
|
|
return value
|
|
}
|
|
}
|
|
}
|
|
return null
|
|
}
|
|
|
|
/**
|
|
* Get a DOM element by ID within the SVG root element.
|
|
* @function module:utilities.getElement
|
|
* @param {string} id - String with the element's new ID
|
|
* @returns {?Element}
|
|
*/
|
|
export const getElement = (id) => {
|
|
// querySelector lookup
|
|
return svgroot_.querySelector('#' + id)
|
|
}
|
|
|
|
/**
|
|
* 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 = (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 (value === undefined) {
|
|
if (ns) {
|
|
elem.removeAttributeNS(ns, key)
|
|
} else {
|
|
elem.removeAttribute(key)
|
|
}
|
|
continue
|
|
}
|
|
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 = (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 = (value) => {
|
|
const unit = svgCanvas.getBaseUnit()
|
|
let stepSize = svgCanvas.getSnappingStep()
|
|
if (unit !== 'px') {
|
|
stepSize *= getTypeMap()[unit]
|
|
}
|
|
value = Math.round(value / stepSize) * stepSize
|
|
return value
|
|
}
|
|
|
|
/**
|
|
* 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 = (img) => {
|
|
$click(img, (e) => {
|
|
e.preventDefault()
|
|
})
|
|
}
|
|
|
|
/**
|
|
* @callback module:utilities.GetNextID
|
|
* @returns {string} The ID
|
|
*/
|
|
|
|
/**
|
|
* 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
|
|
* @param {module:utilities.getHref} mockMethods.getHref
|
|
* @param {module:utilities.setHref} mockMethods.setHref
|
|
* @param {module:utilities.getRotationAngle} mockMethods.getRotationAngle
|
|
* @returns {void}
|
|
*/
|
|
export const mock = ({
|
|
getHref: getHrefUser, setHref: setHrefUser, getRotationAngle: getRotationAngleUser
|
|
}) => {
|
|
getHref = getHrefUser
|
|
setHref = setHrefUser
|
|
getRotationAngle = getRotationAngleUser
|
|
}
|
|
|
|
export const stringToHTML = (str) => {
|
|
const parser = new DOMParser()
|
|
const doc = parser.parseFromString(str, 'text/html')
|
|
return doc.body.firstChild
|
|
}
|
|
|
|
export const insertChildAtIndex = (parent, child, index = 0) => {
|
|
const doc = stringToHTML(child)
|
|
if (index >= parent.children.length) {
|
|
parent.appendChild(doc)
|
|
} else {
|
|
parent.insertBefore(doc, parent.children[index])
|
|
}
|
|
}
|
|
|
|
// shortcuts to common DOM functions
|
|
export const $id = (id) => document.getElementById(id)
|
|
export const $qq = (sel) => document.querySelector(sel)
|
|
export const $qa = (sel) => [...document.querySelectorAll(sel)]
|
|
export const $click = (element, handler) => {
|
|
element.addEventListener('click', handler)
|
|
element.addEventListener('touchend', handler)
|
|
}
|