/* globals jQuery */
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/**
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* Recalculate.
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* @module recalculate
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* @license MIT
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*/
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import jqPluginSVG from './jQuery.attr.js'; // Needed for SVG attribute setting and array form with `attr`
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import {NS} from './namespaces.js';
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import {convertToNum} from './units.js';
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import {isWebkit} from './browser.js';
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import {getTransformList} from './svgtransformlist.js';
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import {getRotationAngle, getHref, getBBox, getRefElem} from './utilities.js';
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import {BatchCommand, ChangeElementCommand} from './history.js';
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import {remapElement} from './coords.js';
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import {
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isIdentity, matrixMultiply, transformPoint, transformListToTransform,
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hasMatrixTransform
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} from './math.js';
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const $ = jqPluginSVG(jQuery);
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let context_;
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/**
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* @interface module:recalculate.EditorContext
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*/
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/**
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* @function module:recalculate.EditorContext#getSVGRoot
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* @returns {SVGSVGElement} The root DOM element
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*/
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/**
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* @function module:recalculate.EditorContext#getStartTransform
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* @returns {string}
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*/
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/**
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* @function module:recalculate.EditorContext#setStartTransform
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* @param {string} transform
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* @returns {undefined}
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*/
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/**
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* @function module:recalculate.init
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* @param {module:recalculate.EditorContext} editorContext
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* @returns {undefined}
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*/
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export const init = function (editorContext) {
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context_ = editorContext;
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};
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/**
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* Updates a `<clipPath>`s values based on the given translation of an element.
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* @function module:recalculate.updateClipPath
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* @param {string} attr - The clip-path attribute value with the clipPath's ID
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* @param {Float} tx - The translation's x value
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* @param {Float} ty - The translation's y value
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* @returns {undefined}
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*/
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export const updateClipPath = function (attr, tx, ty) {
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const path = getRefElem(attr).firstChild;
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const cpXform = getTransformList(path);
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const newxlate = context_.getSVGRoot().createSVGTransform();
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newxlate.setTranslate(tx, ty);
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cpXform.appendItem(newxlate);
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// Update clipPath's dimensions
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recalculateDimensions(path);
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};
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/**
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* Decides the course of action based on the element's transform list.
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* @function module:recalculate.recalculateDimensions
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* @param {Element} selected - The DOM element to recalculate
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* @returns {Command} Undo command object with the resulting change
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*/
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export const recalculateDimensions = function (selected) {
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if (selected == null) { return null; }
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// Firefox Issue - 1081
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if (selected.nodeName === 'svg' && navigator.userAgent.includes('Firefox/20')) {
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return null;
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}
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const svgroot = context_.getSVGRoot();
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const tlist = getTransformList(selected);
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// remove any unnecessary transforms
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if (tlist && tlist.numberOfItems > 0) {
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let k = tlist.numberOfItems;
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const noi = k;
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while (k--) {
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const xform = tlist.getItem(k);
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if (xform.type === 0) {
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tlist.removeItem(k);
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// remove identity matrices
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} else if (xform.type === 1) {
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if (isIdentity(xform.matrix)) {
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if (noi === 1) {
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// Overcome Chrome bug (though only when noi is 1) with
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// `removeItem` preventing `removeAttribute` from
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// subsequently working
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// See https://bugs.chromium.org/p/chromium/issues/detail?id=843901
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selected.removeAttribute('transform');
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return null;
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}
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tlist.removeItem(k);
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}
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// remove zero-degree rotations
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} else if (xform.type === 4) {
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if (xform.angle === 0) {
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tlist.removeItem(k);
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}
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}
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}
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// End here if all it has is a rotation
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if (tlist.numberOfItems === 1 &&
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getRotationAngle(selected)) { return null; }
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}
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// if this element had no transforms, we are done
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if (!tlist || tlist.numberOfItems === 0) {
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// Chrome apparently had a bug that requires clearing the attribute first.
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selected.setAttribute('transform', '');
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// However, this still next line currently doesn't work at all in Chrome
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selected.removeAttribute('transform');
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// selected.transform.baseVal.clear(); // Didn't help for Chrome bug
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return null;
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}
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// TODO: Make this work for more than 2
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if (tlist) {
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let mxs = [];
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let k = tlist.numberOfItems;
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while (k--) {
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const xform = tlist.getItem(k);
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if (xform.type === 1) {
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mxs.push([xform.matrix, k]);
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} else if (mxs.length) {
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mxs = [];
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}
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}
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if (mxs.length === 2) {
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const mNew = svgroot.createSVGTransformFromMatrix(matrixMultiply(mxs[1][0], mxs[0][0]));
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tlist.removeItem(mxs[0][1]);
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tlist.removeItem(mxs[1][1]);
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tlist.insertItemBefore(mNew, mxs[1][1]);
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}
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// combine matrix + translate
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k = tlist.numberOfItems;
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if (k >= 2 && tlist.getItem(k - 2).type === 1 && tlist.getItem(k - 1).type === 2) {
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const mt = svgroot.createSVGTransform();
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const m = matrixMultiply(
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tlist.getItem(k - 2).matrix,
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tlist.getItem(k - 1).matrix);
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mt.setMatrix(m);
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tlist.removeItem(k - 2);
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tlist.removeItem(k - 2);
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tlist.appendItem(mt);
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}
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}
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// If it still has a single [M] or [R][M], return null too (prevents BatchCommand from being returned).
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switch (selected.tagName) {
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// Ignore these elements, as they can absorb the [M]
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case 'line':
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case 'polyline':
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case 'polygon':
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case 'path':
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break;
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default:
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if ((tlist.numberOfItems === 1 && tlist.getItem(0).type === 1) ||
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(tlist.numberOfItems === 2 && tlist.getItem(0).type === 1 && tlist.getItem(0).type === 4)) {
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return null;
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}
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}
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// Grouped SVG element
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const gsvg = $(selected).data('gsvg');
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// we know we have some transforms, so set up return variable
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const batchCmd = new BatchCommand('Transform');
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// store initial values that will be affected by reducing the transform list
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let changes = {};
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let initial = null;
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let attrs = [];
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switch (selected.tagName) {
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case 'line':
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attrs = ['x1', 'y1', 'x2', 'y2'];
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break;
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case 'circle':
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attrs = ['cx', 'cy', 'r'];
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break;
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case 'ellipse':
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attrs = ['cx', 'cy', 'rx', 'ry'];
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break;
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case 'foreignObject':
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case 'rect':
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case 'image':
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attrs = ['width', 'height', 'x', 'y'];
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break;
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case 'use':
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case 'text':
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case 'tspan':
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attrs = ['x', 'y'];
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break;
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case 'polygon':
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case 'polyline': {
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initial = {};
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initial.points = selected.getAttribute('points');
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const list = selected.points;
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const len = list.numberOfItems;
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changes.points = new Array(len);
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for (let i = 0; i < len; ++i) {
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const pt = list.getItem(i);
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changes.points[i] = {x: pt.x, y: pt.y};
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}
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break;
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} case 'path':
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initial = {};
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initial.d = selected.getAttribute('d');
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changes.d = selected.getAttribute('d');
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break;
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} // switch on element type to get initial values
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if (attrs.length) {
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changes = $(selected).attr(attrs);
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$.each(changes, function (attr, val) {
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changes[attr] = convertToNum(attr, val);
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});
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} else if (gsvg) {
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// GSVG exception
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changes = {
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x: $(gsvg).attr('x') || 0,
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y: $(gsvg).attr('y') || 0
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};
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}
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// if we haven't created an initial array in polygon/polyline/path, then
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// make a copy of initial values and include the transform
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if (initial == null) {
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initial = $.extend(true, {}, changes);
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$.each(initial, function (attr, val) {
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initial[attr] = convertToNum(attr, val);
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});
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}
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// save the start transform value too
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initial.transform = context_.getStartTransform() || '';
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let oldcenter, newcenter;
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// if it's a regular group, we have special processing to flatten transforms
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if ((selected.tagName === 'g' && !gsvg) || selected.tagName === 'a') {
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const box = getBBox(selected);
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oldcenter = {x: box.x + box.width / 2, y: box.y + box.height / 2};
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newcenter = transformPoint(
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box.x + box.width / 2,
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box.y + box.height / 2,
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transformListToTransform(tlist).matrix
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);
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// let m = svgroot.createSVGMatrix();
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// temporarily strip off the rotate and save the old center
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const gangle = getRotationAngle(selected);
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if (gangle) {
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const a = gangle * Math.PI / 180;
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let s;
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if (Math.abs(a) > (1.0e-10)) {
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s = Math.sin(a) / (1 - Math.cos(a));
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} else {
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// FIXME: This blows up if the angle is exactly 0!
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s = 2 / a;
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}
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for (let i = 0; i < tlist.numberOfItems; ++i) {
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const xform = tlist.getItem(i);
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if (xform.type === 4) {
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// extract old center through mystical arts
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const rm = xform.matrix;
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oldcenter.y = (s * rm.e + rm.f) / 2;
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oldcenter.x = (rm.e - s * rm.f) / 2;
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tlist.removeItem(i);
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break;
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}
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}
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}
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const N = tlist.numberOfItems;
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let tx = 0, ty = 0, operation = 0;
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let firstM;
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if (N) {
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firstM = tlist.getItem(0).matrix;
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}
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let oldStartTransform;
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// first, if it was a scale then the second-last transform will be it
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if (N >= 3 && tlist.getItem(N - 2).type === 3 &&
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tlist.getItem(N - 3).type === 2 && tlist.getItem(N - 1).type === 2) {
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operation = 3; // scale
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// if the children are unrotated, pass the scale down directly
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// otherwise pass the equivalent matrix() down directly
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const tm = tlist.getItem(N - 3).matrix,
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sm = tlist.getItem(N - 2).matrix,
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tmn = tlist.getItem(N - 1).matrix;
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const children = selected.childNodes;
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let c = children.length;
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while (c--) {
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const child = children.item(c);
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tx = 0;
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ty = 0;
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if (child.nodeType === 1) {
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const childTlist = getTransformList(child);
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// some children might not have a transform (<metadata>, <defs>, etc)
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if (!childTlist) { continue; }
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const m = transformListToTransform(childTlist).matrix;
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// Convert a matrix to a scale if applicable
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// if (hasMatrixTransform(childTlist) && childTlist.numberOfItems == 1) {
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// if (m.b==0 && m.c==0 && m.e==0 && m.f==0) {
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// childTlist.removeItem(0);
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// const translateOrigin = svgroot.createSVGTransform(),
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// scale = svgroot.createSVGTransform(),
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// translateBack = svgroot.createSVGTransform();
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// translateOrigin.setTranslate(0, 0);
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// scale.setScale(m.a, m.d);
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// translateBack.setTranslate(0, 0);
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// childTlist.appendItem(translateBack);
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// childTlist.appendItem(scale);
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// childTlist.appendItem(translateOrigin);
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// }
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// }
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const angle = getRotationAngle(child);
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oldStartTransform = context_.getStartTransform();
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const childxforms = [];
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context_.setStartTransform(child.getAttribute('transform'));
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if (angle || hasMatrixTransform(childTlist)) {
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const e2t = svgroot.createSVGTransform();
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e2t.setMatrix(matrixMultiply(tm, sm, tmn, m));
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childTlist.clear();
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childTlist.appendItem(e2t);
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childxforms.push(e2t);
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// if not rotated or skewed, push the [T][S][-T] down to the child
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} else {
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// update the transform list with translate,scale,translate
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// slide the [T][S][-T] from the front to the back
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// [T][S][-T][M] = [M][T2][S2][-T2]
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// (only bringing [-T] to the right of [M])
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// [T][S][-T][M] = [T][S][M][-T2]
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// [-T2] = [M_inv][-T][M]
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const t2n = matrixMultiply(m.inverse(), tmn, m);
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// [T2] is always negative translation of [-T2]
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const t2 = svgroot.createSVGMatrix();
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t2.e = -t2n.e;
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t2.f = -t2n.f;
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// [T][S][-T][M] = [M][T2][S2][-T2]
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// [S2] = [T2_inv][M_inv][T][S][-T][M][-T2_inv]
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const s2 = matrixMultiply(t2.inverse(), m.inverse(), tm, sm, tmn, m, t2n.inverse());
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const translateOrigin = svgroot.createSVGTransform(),
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scale = svgroot.createSVGTransform(),
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translateBack = svgroot.createSVGTransform();
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translateOrigin.setTranslate(t2n.e, t2n.f);
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scale.setScale(s2.a, s2.d);
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translateBack.setTranslate(t2.e, t2.f);
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childTlist.appendItem(translateBack);
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childTlist.appendItem(scale);
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childTlist.appendItem(translateOrigin);
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childxforms.push(translateBack);
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childxforms.push(scale);
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childxforms.push(translateOrigin);
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// logMatrix(translateBack.matrix);
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// logMatrix(scale.matrix);
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} // not rotated
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batchCmd.addSubCommand(recalculateDimensions(child));
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// TODO: If any <use> have this group as a parent and are
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// referencing this child, then we need to impose a reverse
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// scale on it so that when it won't get double-translated
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// const uses = selected.getElementsByTagNameNS(NS.SVG, 'use');
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// const href = '#' + child.id;
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// let u = uses.length;
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// while (u--) {
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// const useElem = uses.item(u);
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// if (href == getHref(useElem)) {
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// const usexlate = svgroot.createSVGTransform();
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// usexlate.setTranslate(-tx,-ty);
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// getTransformList(useElem).insertItemBefore(usexlate,0);
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// batchCmd.addSubCommand( recalculateDimensions(useElem) );
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// }
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// }
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context_.setStartTransform(oldStartTransform);
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} // element
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} // for each child
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// Remove these transforms from group
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tlist.removeItem(N - 1);
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tlist.removeItem(N - 2);
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tlist.removeItem(N - 3);
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} else if (N >= 3 && tlist.getItem(N - 1).type === 1) {
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operation = 3; // scale
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const m = transformListToTransform(tlist).matrix;
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const e2t = svgroot.createSVGTransform();
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e2t.setMatrix(m);
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tlist.clear();
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tlist.appendItem(e2t);
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// next, check if the first transform was a translate
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// if we had [ T1 ] [ M ] we want to transform this into [ M ] [ T2 ]
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// therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ]
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} else if ((N === 1 || (N > 1 && tlist.getItem(1).type !== 3)) &&
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tlist.getItem(0).type === 2) {
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operation = 2; // translate
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const T_M = transformListToTransform(tlist).matrix;
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tlist.removeItem(0);
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const mInv = transformListToTransform(tlist).matrix.inverse();
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const M2 = matrixMultiply(mInv, T_M);
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tx = M2.e;
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ty = M2.f;
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if (tx !== 0 || ty !== 0) {
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// we pass the translates down to the individual children
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const children = selected.childNodes;
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let c = children.length;
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const clipPathsDone = [];
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while (c--) {
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const child = children.item(c);
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if (child.nodeType === 1) {
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// Check if child has clip-path
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if (child.getAttribute('clip-path')) {
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// tx, ty
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const attr = child.getAttribute('clip-path');
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if (!clipPathsDone.includes(attr)) {
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updateClipPath(attr, tx, ty);
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clipPathsDone.push(attr);
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}
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}
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oldStartTransform = context_.getStartTransform();
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context_.setStartTransform(child.getAttribute('transform'));
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const childTlist = getTransformList(child);
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// some children might not have a transform (<metadata>, <defs>, etc)
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if (childTlist) {
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const newxlate = svgroot.createSVGTransform();
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newxlate.setTranslate(tx, ty);
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if (childTlist.numberOfItems) {
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childTlist.insertItemBefore(newxlate, 0);
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} else {
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childTlist.appendItem(newxlate);
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}
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batchCmd.addSubCommand(recalculateDimensions(child));
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// If any <use> have this group as a parent and are
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// referencing this child, then impose a reverse translate on it
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// so that when it won't get double-translated
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const uses = selected.getElementsByTagNameNS(NS.SVG, 'use');
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const href = '#' + child.id;
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let u = uses.length;
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while (u--) {
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const useElem = uses.item(u);
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if (href === getHref(useElem)) {
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const usexlate = svgroot.createSVGTransform();
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usexlate.setTranslate(-tx, -ty);
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getTransformList(useElem).insertItemBefore(usexlate, 0);
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batchCmd.addSubCommand(recalculateDimensions(useElem));
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}
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}
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context_.setStartTransform(oldStartTransform);
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}
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}
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}
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context_.setStartTransform(oldStartTransform);
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}
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// else, a matrix imposition from a parent group
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// keep pushing it down to the children
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} else if (N === 1 && tlist.getItem(0).type === 1 && !gangle) {
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operation = 1;
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const m = tlist.getItem(0).matrix,
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children = selected.childNodes;
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let c = children.length;
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while (c--) {
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const child = children.item(c);
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if (child.nodeType === 1) {
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oldStartTransform = context_.getStartTransform();
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context_.setStartTransform(child.getAttribute('transform'));
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const childTlist = getTransformList(child);
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if (!childTlist) { continue; }
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const em = matrixMultiply(m, transformListToTransform(childTlist).matrix);
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const e2m = svgroot.createSVGTransform();
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e2m.setMatrix(em);
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childTlist.clear();
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childTlist.appendItem(e2m, 0);
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batchCmd.addSubCommand(recalculateDimensions(child));
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context_.setStartTransform(oldStartTransform);
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// Convert stroke
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// TODO: Find out if this should actually happen somewhere else
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const sw = child.getAttribute('stroke-width');
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if (child.getAttribute('stroke') !== 'none' && !isNaN(sw)) {
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const avg = (Math.abs(em.a) + Math.abs(em.d)) / 2;
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child.setAttribute('stroke-width', sw * avg);
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}
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}
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}
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tlist.clear();
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// else it was just a rotate
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} else {
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if (gangle) {
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const newRot = svgroot.createSVGTransform();
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newRot.setRotate(gangle, newcenter.x, newcenter.y);
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if (tlist.numberOfItems) {
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tlist.insertItemBefore(newRot, 0);
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} else {
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tlist.appendItem(newRot);
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}
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}
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if (tlist.numberOfItems === 0) {
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selected.removeAttribute('transform');
|
}
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return null;
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}
|
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// if it was a translate, put back the rotate at the new center
|
if (operation === 2) {
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if (gangle) {
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newcenter = {
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x: oldcenter.x + firstM.e,
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y: oldcenter.y + firstM.f
|
};
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const newRot = svgroot.createSVGTransform();
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newRot.setRotate(gangle, newcenter.x, newcenter.y);
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if (tlist.numberOfItems) {
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tlist.insertItemBefore(newRot, 0);
|
} else {
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tlist.appendItem(newRot);
|
}
|
}
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// if it was a resize
|
} else if (operation === 3) {
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const m = transformListToTransform(tlist).matrix;
|
const roldt = svgroot.createSVGTransform();
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roldt.setRotate(gangle, oldcenter.x, oldcenter.y);
|
const rold = roldt.matrix;
|
const rnew = svgroot.createSVGTransform();
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rnew.setRotate(gangle, newcenter.x, newcenter.y);
|
const rnewInv = rnew.matrix.inverse(),
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mInv = m.inverse(),
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extrat = matrixMultiply(mInv, rnewInv, rold, m);
|
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tx = extrat.e;
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ty = extrat.f;
|
|
if (tx !== 0 || ty !== 0) {
|
// now push this transform down to the children
|
// we pass the translates down to the individual children
|
const children = selected.childNodes;
|
let c = children.length;
|
while (c--) {
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const child = children.item(c);
|
if (child.nodeType === 1) {
|
oldStartTransform = context_.getStartTransform();
|
context_.setStartTransform(child.getAttribute('transform'));
|
const childTlist = getTransformList(child);
|
const newxlate = svgroot.createSVGTransform();
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newxlate.setTranslate(tx, ty);
|
if (childTlist.numberOfItems) {
|
childTlist.insertItemBefore(newxlate, 0);
|
} else {
|
childTlist.appendItem(newxlate);
|
}
|
|
batchCmd.addSubCommand(recalculateDimensions(child));
|
context_.setStartTransform(oldStartTransform);
|
}
|
}
|
}
|
|
if (gangle) {
|
if (tlist.numberOfItems) {
|
tlist.insertItemBefore(rnew, 0);
|
} else {
|
tlist.appendItem(rnew);
|
}
|
}
|
}
|
// else, it's a non-group
|
} else {
|
// FIXME: box might be null for some elements (<metadata> etc), need to handle this
|
const box = getBBox(selected);
|
|
// Paths (and possbly other shapes) will have no BBox while still in <defs>,
|
// but we still may need to recalculate them (see issue 595).
|
// TODO: Figure out how to get BBox from these elements in case they
|
// have a rotation transform
|
|
if (!box && selected.tagName !== 'path') return null;
|
|
let m; // = svgroot.createSVGMatrix();
|
// temporarily strip off the rotate and save the old center
|
const angle = getRotationAngle(selected);
|
if (angle) {
|
oldcenter = {x: box.x + box.width / 2, y: box.y + box.height / 2};
|
newcenter = transformPoint(
|
box.x + box.width / 2,
|
box.y + box.height / 2,
|
transformListToTransform(tlist).matrix
|
);
|
|
const a = angle * Math.PI / 180;
|
const s = (Math.abs(a) > (1.0e-10))
|
? Math.sin(a) / (1 - Math.cos(a))
|
// FIXME: This blows up if the angle is exactly 0!
|
: 2 / a;
|
|
for (let i = 0; i < tlist.numberOfItems; ++i) {
|
const xform = tlist.getItem(i);
|
if (xform.type === 4) {
|
// extract old center through mystical arts
|
const rm = xform.matrix;
|
oldcenter.y = (s * rm.e + rm.f) / 2;
|
oldcenter.x = (rm.e - s * rm.f) / 2;
|
tlist.removeItem(i);
|
break;
|
}
|
}
|
}
|
|
// 2 = translate, 3 = scale, 4 = rotate, 1 = matrix imposition
|
let operation = 0;
|
const N = tlist.numberOfItems;
|
|
// Check if it has a gradient with userSpaceOnUse, in which case
|
// adjust it by recalculating the matrix transform.
|
// TODO: Make this work in Webkit using transformlist.SVGTransformList
|
if (!isWebkit()) {
|
const fill = selected.getAttribute('fill');
|
if (fill && fill.startsWith('url(')) {
|
const paint = getRefElem(fill);
|
let type = 'pattern';
|
if (paint.tagName !== type) type = 'gradient';
|
const attrVal = paint.getAttribute(type + 'Units');
|
if (attrVal === 'userSpaceOnUse') {
|
// Update the userSpaceOnUse element
|
m = transformListToTransform(tlist).matrix;
|
const gtlist = getTransformList(paint);
|
const gmatrix = transformListToTransform(gtlist).matrix;
|
m = matrixMultiply(m, gmatrix);
|
const mStr = 'matrix(' + [m.a, m.b, m.c, m.d, m.e, m.f].join(',') + ')';
|
paint.setAttribute(type + 'Transform', mStr);
|
}
|
}
|
}
|
|
// first, if it was a scale of a non-skewed element, then the second-last
|
// transform will be the [S]
|
// if we had [M][T][S][T] we want to extract the matrix equivalent of
|
// [T][S][T] and push it down to the element
|
if (N >= 3 && tlist.getItem(N - 2).type === 3 &&
|
tlist.getItem(N - 3).type === 2 && tlist.getItem(N - 1).type === 2) {
|
// Removed this so a <use> with a given [T][S][T] would convert to a matrix.
|
// Is that bad?
|
// && selected.nodeName != 'use'
|
operation = 3; // scale
|
m = transformListToTransform(tlist, N - 3, N - 1).matrix;
|
tlist.removeItem(N - 1);
|
tlist.removeItem(N - 2);
|
tlist.removeItem(N - 3);
|
// if we had [T][S][-T][M], then this was a skewed element being resized
|
// Thus, we simply combine it all into one matrix
|
} else if (N === 4 && tlist.getItem(N - 1).type === 1) {
|
operation = 3; // scale
|
m = transformListToTransform(tlist).matrix;
|
const e2t = svgroot.createSVGTransform();
|
e2t.setMatrix(m);
|
tlist.clear();
|
tlist.appendItem(e2t);
|
// reset the matrix so that the element is not re-mapped
|
m = svgroot.createSVGMatrix();
|
// if we had [R][T][S][-T][M], then this was a rotated matrix-element
|
// if we had [T1][M] we want to transform this into [M][T2]
|
// therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ] and we can push [T2]
|
// down to the element
|
} else if ((N === 1 || (N > 1 && tlist.getItem(1).type !== 3)) &&
|
tlist.getItem(0).type === 2) {
|
operation = 2; // translate
|
const oldxlate = tlist.getItem(0).matrix,
|
meq = transformListToTransform(tlist, 1).matrix,
|
meqInv = meq.inverse();
|
m = matrixMultiply(meqInv, oldxlate, meq);
|
tlist.removeItem(0);
|
// else if this child now has a matrix imposition (from a parent group)
|
// we might be able to simplify
|
} else if (N === 1 && tlist.getItem(0).type === 1 && !angle) {
|
// Remap all point-based elements
|
m = transformListToTransform(tlist).matrix;
|
switch (selected.tagName) {
|
case 'line':
|
changes = $(selected).attr(['x1', 'y1', 'x2', 'y2']);
|
// Fallthrough
|
case 'polyline':
|
case 'polygon':
|
changes.points = selected.getAttribute('points');
|
if (changes.points) {
|
const list = selected.points;
|
const len = list.numberOfItems;
|
changes.points = new Array(len);
|
for (let i = 0; i < len; ++i) {
|
const pt = list.getItem(i);
|
changes.points[i] = {x: pt.x, y: pt.y};
|
}
|
}
|
// Fallthrough
|
case 'path':
|
changes.d = selected.getAttribute('d');
|
operation = 1;
|
tlist.clear();
|
break;
|
default:
|
break;
|
}
|
// if it was a rotation, put the rotate back and return without a command
|
// (this function has zero work to do for a rotate())
|
} else {
|
// operation = 4; // rotation
|
if (angle) {
|
const newRot = svgroot.createSVGTransform();
|
newRot.setRotate(angle, newcenter.x, newcenter.y);
|
|
if (tlist.numberOfItems) {
|
tlist.insertItemBefore(newRot, 0);
|
} else {
|
tlist.appendItem(newRot);
|
}
|
}
|
if (tlist.numberOfItems === 0) {
|
selected.removeAttribute('transform');
|
}
|
return null;
|
}
|
|
// if it was a translate or resize, we need to remap the element and absorb the xform
|
if (operation === 1 || operation === 2 || operation === 3) {
|
remapElement(selected, changes, m);
|
} // if we are remapping
|
|
// if it was a translate, put back the rotate at the new center
|
if (operation === 2) {
|
if (angle) {
|
if (!hasMatrixTransform(tlist)) {
|
newcenter = {
|
x: oldcenter.x + m.e,
|
y: oldcenter.y + m.f
|
};
|
}
|
const newRot = svgroot.createSVGTransform();
|
newRot.setRotate(angle, newcenter.x, newcenter.y);
|
if (tlist.numberOfItems) {
|
tlist.insertItemBefore(newRot, 0);
|
} else {
|
tlist.appendItem(newRot);
|
}
|
}
|
// We have special processing for tspans: Tspans are not transformable
|
// but they can have x,y coordinates (sigh). Thus, if this was a translate,
|
// on a text element, also translate any tspan children.
|
if (selected.tagName === 'text') {
|
const children = selected.childNodes;
|
let c = children.length;
|
while (c--) {
|
const child = children.item(c);
|
if (child.tagName === 'tspan') {
|
const tspanChanges = {
|
x: $(child).attr('x') || 0,
|
y: $(child).attr('y') || 0
|
};
|
remapElement(child, tspanChanges, m);
|
}
|
}
|
}
|
// [Rold][M][T][S][-T] became [Rold][M]
|
// we want it to be [Rnew][M][Tr] where Tr is the
|
// translation required to re-center it
|
// Therefore, [Tr] = [M_inv][Rnew_inv][Rold][M]
|
} else if (operation === 3 && angle) {
|
const m = transformListToTransform(tlist).matrix;
|
const roldt = svgroot.createSVGTransform();
|
roldt.setRotate(angle, oldcenter.x, oldcenter.y);
|
const rold = roldt.matrix;
|
const rnew = svgroot.createSVGTransform();
|
rnew.setRotate(angle, newcenter.x, newcenter.y);
|
const rnewInv = rnew.matrix.inverse();
|
const mInv = m.inverse();
|
const extrat = matrixMultiply(mInv, rnewInv, rold, m);
|
|
remapElement(selected, changes, extrat);
|
if (angle) {
|
if (tlist.numberOfItems) {
|
tlist.insertItemBefore(rnew, 0);
|
} else {
|
tlist.appendItem(rnew);
|
}
|
}
|
}
|
} // a non-group
|
|
// if the transform list has been emptied, remove it
|
if (tlist.numberOfItems === 0) {
|
selected.removeAttribute('transform');
|
}
|
|
batchCmd.addSubCommand(new ChangeElementCommand(selected, initial));
|
|
return batchCmd;
|
};
|
