317 lines
9.7 KiB
JavaScript
317 lines
9.7 KiB
JavaScript
/* globals jQuery */
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/**
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* Manipulating coordinates
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* @module coords
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* @license MIT
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*/
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import './svgpathseg.js';
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import {
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snapToGrid, assignAttributes, getBBox, getRefElem, findDefs
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} from './utilities.js';
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import {
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transformPoint, transformListToTransform, matrixMultiply, transformBox
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} from './math.js';
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import {getTransformList} from './svgtransformlist.js';
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const $ = jQuery;
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// this is how we map paths to our preferred relative segment types
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const pathMap = [
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0, 'z', 'M', 'm', 'L', 'l', 'C', 'c', 'Q', 'q', 'A', 'a',
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'H', 'h', 'V', 'v', 'S', 's', 'T', 't'
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];
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/**
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* @interface module:coords.EditorContext
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*/
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/**
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* @function module:coords.EditorContext#getGridSnapping
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* @returns {boolean}
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*/
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/**
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* @function module:coords.EditorContext#getDrawing
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* @returns {module:draw.Drawing}
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*/
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/**
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* @function module:coords.EditorContext#getSVGRoot
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* @returns {SVGSVGElement}
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*/
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let editorContext_ = null;
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/**
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* @function module:coords.init
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* @param {module:coords.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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editorContext_ = editorContext;
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};
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/**
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* Applies coordinate changes to an element based on the given matrix.
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* @function module:coords.remapElement
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* @implements {module:path.EditorContext#remapElement}
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*/
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export const remapElement = function (selected, changes, m) {
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const remap = function (x, y) { return transformPoint(x, y, m); },
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scalew = function (w) { return m.a * w; },
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scaleh = function (h) { return m.d * h; },
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doSnapping = editorContext_.getGridSnapping() && selected.parentNode.parentNode.localName === 'svg',
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finishUp = function () {
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if (doSnapping) {
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Object.entries(changes).forEach(([o, value]) => {
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changes[o] = snapToGrid(value);
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});
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}
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assignAttributes(selected, changes, 1000, true);
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},
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box = getBBox(selected);
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for (let i = 0; i < 2; i++) {
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const type = i === 0 ? 'fill' : 'stroke';
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const attrVal = selected.getAttribute(type);
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if (attrVal && attrVal.startsWith('url(')) {
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if (m.a < 0 || m.d < 0) {
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const grad = getRefElem(attrVal);
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const newgrad = grad.cloneNode(true);
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if (m.a < 0) {
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// flip x
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const x1 = newgrad.getAttribute('x1');
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const x2 = newgrad.getAttribute('x2');
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newgrad.setAttribute('x1', -(x1 - 1));
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newgrad.setAttribute('x2', -(x2 - 1));
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}
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if (m.d < 0) {
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// flip y
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const y1 = newgrad.getAttribute('y1');
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const y2 = newgrad.getAttribute('y2');
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newgrad.setAttribute('y1', -(y1 - 1));
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newgrad.setAttribute('y2', -(y2 - 1));
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}
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newgrad.id = editorContext_.getDrawing().getNextId();
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findDefs().append(newgrad);
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selected.setAttribute(type, 'url(#' + newgrad.id + ')');
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}
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// Not really working :(
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// if (selected.tagName === 'path') {
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// reorientGrads(selected, m);
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// }
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}
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}
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const elName = selected.tagName;
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if (elName === 'g' || elName === 'text' || elName === 'tspan' || elName === 'use') {
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// if it was a translate, then just update x,y
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if (m.a === 1 && m.b === 0 && m.c === 0 && m.d === 1 && (m.e !== 0 || m.f !== 0)) {
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// [T][M] = [M][T']
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// therefore [T'] = [M_inv][T][M]
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const existing = transformListToTransform(selected).matrix,
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tNew = matrixMultiply(existing.inverse(), m, existing);
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changes.x = parseFloat(changes.x) + tNew.e;
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changes.y = parseFloat(changes.y) + tNew.f;
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} else {
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// we just absorb all matrices into the element and don't do any remapping
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const chlist = getTransformList(selected);
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const mt = editorContext_.getSVGRoot().createSVGTransform();
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mt.setMatrix(matrixMultiply(transformListToTransform(chlist).matrix, m));
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chlist.clear();
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chlist.appendItem(mt);
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}
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}
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// now we have a set of changes and an applied reduced transform list
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// we apply the changes directly to the DOM
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switch (elName) {
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case 'foreignObject':
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case 'rect':
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case 'image': {
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// Allow images to be inverted (give them matrix when flipped)
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if (elName === 'image' && (m.a < 0 || m.d < 0)) {
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// Convert to matrix
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const chlist = getTransformList(selected);
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const mt = editorContext_.getSVGRoot().createSVGTransform();
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mt.setMatrix(matrixMultiply(transformListToTransform(chlist).matrix, m));
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chlist.clear();
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chlist.appendItem(mt);
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} else {
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const pt1 = remap(changes.x, changes.y);
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changes.width = scalew(changes.width);
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changes.height = scaleh(changes.height);
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changes.x = pt1.x + Math.min(0, changes.width);
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changes.y = pt1.y + Math.min(0, changes.height);
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changes.width = Math.abs(changes.width);
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changes.height = Math.abs(changes.height);
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}
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finishUp();
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break;
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} case 'ellipse': {
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const c = remap(changes.cx, changes.cy);
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changes.cx = c.x;
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changes.cy = c.y;
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changes.rx = scalew(changes.rx);
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changes.ry = scaleh(changes.ry);
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changes.rx = Math.abs(changes.rx);
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changes.ry = Math.abs(changes.ry);
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finishUp();
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break;
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} case 'circle': {
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const c = remap(changes.cx, changes.cy);
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changes.cx = c.x;
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changes.cy = c.y;
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// take the minimum of the new selected box's dimensions for the new circle radius
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const tbox = transformBox(box.x, box.y, box.width, box.height, m);
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const w = tbox.tr.x - tbox.tl.x, h = tbox.bl.y - tbox.tl.y;
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changes.r = Math.min(w / 2, h / 2);
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if (changes.r) { changes.r = Math.abs(changes.r); }
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finishUp();
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break;
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} case 'line': {
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const pt1 = remap(changes.x1, changes.y1);
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const pt2 = remap(changes.x2, changes.y2);
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changes.x1 = pt1.x;
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changes.y1 = pt1.y;
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changes.x2 = pt2.x;
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changes.y2 = pt2.y;
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} // Fallthrough
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case 'text':
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case 'tspan':
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case 'use': {
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finishUp();
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break;
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} case 'g': {
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const gsvg = $(selected).data('gsvg');
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if (gsvg) {
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assignAttributes(gsvg, changes, 1000, true);
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}
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break;
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} case 'polyline':
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case 'polygon': {
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const len = changes.points.length;
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for (let i = 0; i < len; ++i) {
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const pt = changes.points[i];
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const {x, y} = remap(pt.x, pt.y);
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changes.points[i].x = x;
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changes.points[i].y = y;
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}
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// const len = changes.points.length;
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let pstr = '';
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for (let i = 0; i < len; ++i) {
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const pt = changes.points[i];
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pstr += pt.x + ',' + pt.y + ' ';
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}
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selected.setAttribute('points', pstr);
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break;
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} case 'path': {
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const segList = selected.pathSegList;
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let len = segList.numberOfItems;
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changes.d = [];
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for (let i = 0; i < len; ++i) {
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const seg = segList.getItem(i);
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changes.d[i] = {
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type: seg.pathSegType,
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x: seg.x,
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y: seg.y,
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x1: seg.x1,
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y1: seg.y1,
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x2: seg.x2,
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y2: seg.y2,
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r1: seg.r1,
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r2: seg.r2,
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angle: seg.angle,
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largeArcFlag: seg.largeArcFlag,
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sweepFlag: seg.sweepFlag
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};
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}
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len = changes.d.length;
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const firstseg = changes.d[0],
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currentpt = remap(firstseg.x, firstseg.y);
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changes.d[0].x = currentpt.x;
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changes.d[0].y = currentpt.y;
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for (let i = 1; i < len; ++i) {
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const seg = changes.d[i];
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const {type} = seg;
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// if absolute or first segment, we want to remap x, y, x1, y1, x2, y2
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// if relative, we want to scalew, scaleh
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if (type % 2 === 0) { // absolute
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const thisx = (seg.x !== undefined) ? seg.x : currentpt.x, // for V commands
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thisy = (seg.y !== undefined) ? seg.y : currentpt.y; // for H commands
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const pt = remap(thisx, thisy);
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const pt1 = remap(seg.x1, seg.y1);
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const pt2 = remap(seg.x2, seg.y2);
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seg.x = pt.x;
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seg.y = pt.y;
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seg.x1 = pt1.x;
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seg.y1 = pt1.y;
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seg.x2 = pt2.x;
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seg.y2 = pt2.y;
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seg.r1 = scalew(seg.r1);
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seg.r2 = scaleh(seg.r2);
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} else { // relative
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seg.x = scalew(seg.x);
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seg.y = scaleh(seg.y);
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seg.x1 = scalew(seg.x1);
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seg.y1 = scaleh(seg.y1);
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seg.x2 = scalew(seg.x2);
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seg.y2 = scaleh(seg.y2);
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seg.r1 = scalew(seg.r1);
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seg.r2 = scaleh(seg.r2);
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}
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} // for each segment
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let dstr = '';
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len = changes.d.length;
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for (let i = 0; i < len; ++i) {
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const seg = changes.d[i];
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const {type} = seg;
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dstr += pathMap[type];
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switch (type) {
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case 13: // relative horizontal line (h)
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case 12: // absolute horizontal line (H)
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dstr += seg.x + ' ';
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break;
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case 15: // relative vertical line (v)
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case 14: // absolute vertical line (V)
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dstr += seg.y + ' ';
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break;
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case 3: // relative move (m)
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case 5: // relative line (l)
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case 19: // relative smooth quad (t)
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case 2: // absolute move (M)
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case 4: // absolute line (L)
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case 18: // absolute smooth quad (T)
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dstr += seg.x + ',' + seg.y + ' ';
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break;
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case 7: // relative cubic (c)
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case 6: // absolute cubic (C)
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dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x2 + ',' + seg.y2 + ' ' +
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seg.x + ',' + seg.y + ' ';
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break;
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case 9: // relative quad (q)
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case 8: // absolute quad (Q)
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dstr += seg.x1 + ',' + seg.y1 + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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case 11: // relative elliptical arc (a)
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case 10: // absolute elliptical arc (A)
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dstr += seg.r1 + ',' + seg.r2 + ' ' + seg.angle + ' ' + Number(seg.largeArcFlag) +
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' ' + Number(seg.sweepFlag) + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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case 17: // relative smooth cubic (s)
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case 16: // absolute smooth cubic (S)
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dstr += seg.x2 + ',' + seg.y2 + ' ' + seg.x + ',' + seg.y + ' ';
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break;
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}
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}
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selected.setAttribute('d', dstr);
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break;
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}
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}
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};
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