commit toward svgcanvas/svgedit isolation
This commit is contained in:
JFH
@@ -1,222 +0,0 @@
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/**
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* Mathematical utilities.
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* @module math
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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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/**
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* @typedef {PlainObject} module:math.AngleCoord45
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* @property {Float} x - The angle-snapped x value
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* @property {Float} y - The angle-snapped y value
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* @property {Integer} a - The angle at which to snap
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*/
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/**
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* @typedef {PlainObject} module:math.XYObject
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* @property {Float} x
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* @property {Float} y
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*/
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import {NS} from './namespaces.js';
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import {getTransformList} from './svgtransformlist.js';
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// Constants
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const NEAR_ZERO = 1e-14;
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// Throw away SVGSVGElement used for creating matrices/transforms.
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const svg = document.createElementNS(NS.SVG, 'svg');
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/**
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* A (hopefully) quicker function to transform a point by a matrix
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* (this function avoids any DOM calls and just does the math).
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* @function module:math.transformPoint
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* @param {Float} x - Float representing the x coordinate
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* @param {Float} y - Float representing the y coordinate
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* @param {SVGMatrix} m - Matrix object to transform the point with
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* @returns {module:math.XYObject} An x, y object representing the transformed point
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*/
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export const transformPoint = function (x, y, m) {
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return {x: m.a * x + m.c * y + m.e, y: m.b * x + m.d * y + m.f};
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};
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/**
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* Helper function to check if the matrix performs no actual transform
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* (i.e. exists for identity purposes).
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* @function module:math.isIdentity
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* @param {SVGMatrix} m - The matrix object to check
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* @returns {boolean} Indicates whether or not the matrix is 1,0,0,1,0,0
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*/
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export const isIdentity = function (m) {
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return (m.a === 1 && m.b === 0 && m.c === 0 && m.d === 1 && m.e === 0 && m.f === 0);
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};
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/**
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* This function tries to return a `SVGMatrix` that is the multiplication `m1 * m2`.
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* We also round to zero when it's near zero.
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* @function module:math.matrixMultiply
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* @param {...SVGMatrix} args - Matrix objects to multiply
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* @returns {SVGMatrix} The matrix object resulting from the calculation
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*/
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export const matrixMultiply = function (...args) {
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const m = args.reduceRight((prev, m1) => {
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return m1.multiply(prev);
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});
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if (Math.abs(m.a) < NEAR_ZERO) { m.a = 0; }
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if (Math.abs(m.b) < NEAR_ZERO) { m.b = 0; }
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if (Math.abs(m.c) < NEAR_ZERO) { m.c = 0; }
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if (Math.abs(m.d) < NEAR_ZERO) { m.d = 0; }
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if (Math.abs(m.e) < NEAR_ZERO) { m.e = 0; }
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if (Math.abs(m.f) < NEAR_ZERO) { m.f = 0; }
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return m;
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};
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/**
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* See if the given transformlist includes a non-indentity matrix transform.
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* @function module:math.hasMatrixTransform
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* @param {SVGTransformList} [tlist] - The transformlist to check
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* @returns {boolean} Whether or not a matrix transform was found
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*/
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export const hasMatrixTransform = function (tlist) {
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if (!tlist) { return false; }
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let num = tlist.numberOfItems;
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while (num--) {
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const xform = tlist.getItem(num);
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if (xform.type === 1 && !isIdentity(xform.matrix)) { return true; }
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}
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return false;
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};
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/**
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* @typedef {PlainObject} module:math.TransformedBox An object with the following values
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* @property {module:math.XYObject} tl - The top left coordinate
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* @property {module:math.XYObject} tr - The top right coordinate
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* @property {module:math.XYObject} bl - The bottom left coordinate
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* @property {module:math.XYObject} br - The bottom right coordinate
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* @property {PlainObject} aabox - Object with the following values:
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* @property {Float} aabox.x - Float with the axis-aligned x coordinate
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* @property {Float} aabox.y - Float with the axis-aligned y coordinate
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* @property {Float} aabox.width - Float with the axis-aligned width coordinate
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* @property {Float} aabox.height - Float with the axis-aligned height coordinate
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*/
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/**
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* Transforms a rectangle based on the given matrix.
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* @function module:math.transformBox
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* @param {Float} l - Float with the box's left coordinate
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* @param {Float} t - Float with the box's top coordinate
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* @param {Float} w - Float with the box width
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* @param {Float} h - Float with the box height
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* @param {SVGMatrix} m - Matrix object to transform the box by
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* @returns {module:math.TransformedBox}
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*/
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export const transformBox = function (l, t, w, h, m) {
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const tl = transformPoint(l, t, m),
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tr = transformPoint((l + w), t, m),
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bl = transformPoint(l, (t + h), m),
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br = transformPoint((l + w), (t + h), m),
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minx = Math.min(tl.x, tr.x, bl.x, br.x),
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maxx = Math.max(tl.x, tr.x, bl.x, br.x),
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miny = Math.min(tl.y, tr.y, bl.y, br.y),
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maxy = Math.max(tl.y, tr.y, bl.y, br.y);
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return {
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tl,
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tr,
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bl,
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br,
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aabox: {
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x: minx,
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y: miny,
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width: (maxx - minx),
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height: (maxy - miny)
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}
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};
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};
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/**
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* This returns a single matrix Transform for a given Transform List
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* (this is the equivalent of `SVGTransformList.consolidate()` but unlike
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* that method, this one does not modify the actual `SVGTransformList`).
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* This function is very liberal with its `min`, `max` arguments.
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* @function module:math.transformListToTransform
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* @param {SVGTransformList} tlist - The transformlist object
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* @param {Integer} [min=0] - Optional integer indicating start transform position
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* @param {Integer} [max] - Optional integer indicating end transform position;
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* defaults to one less than the tlist's `numberOfItems`
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* @returns {SVGTransform} A single matrix transform object
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*/
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export const transformListToTransform = function (tlist, min, max) {
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if (!tlist) {
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// Or should tlist = null have been prevented before this?
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return svg.createSVGTransformFromMatrix(svg.createSVGMatrix());
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}
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min = min || 0;
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max = max || (tlist.numberOfItems - 1);
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min = Number.parseInt(min);
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max = Number.parseInt(max);
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if (min > max) { const temp = max; max = min; min = temp; }
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let m = svg.createSVGMatrix();
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for (let i = min; i <= max; ++i) {
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// if our indices are out of range, just use a harmless identity matrix
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const mtom = (i >= 0 && i < tlist.numberOfItems
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? tlist.getItem(i).matrix
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: svg.createSVGMatrix());
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m = matrixMultiply(m, mtom);
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}
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return svg.createSVGTransformFromMatrix(m);
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};
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/**
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* Get the matrix object for a given element.
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* @function module:math.getMatrix
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* @param {Element} elem - The DOM element to check
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* @returns {SVGMatrix} The matrix object associated with the element's transformlist
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*/
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export const getMatrix = function (elem) {
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const tlist = getTransformList(elem);
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return transformListToTransform(tlist).matrix;
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};
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/**
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* Returns a 45 degree angle coordinate associated with the two given
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* coordinates.
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* @function module:math.snapToAngle
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* @param {Integer} x1 - First coordinate's x value
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* @param {Integer} y1 - First coordinate's y value
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* @param {Integer} x2 - Second coordinate's x value
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* @param {Integer} y2 - Second coordinate's y value
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* @returns {module:math.AngleCoord45}
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*/
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export const snapToAngle = function (x1, y1, x2, y2) {
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const snap = Math.PI / 4; // 45 degrees
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const dx = x2 - x1;
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const dy = y2 - y1;
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const angle = Math.atan2(dy, dx);
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const dist = Math.sqrt(dx * dx + dy * dy);
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const snapangle = Math.round(angle / snap) * snap;
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return {
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x: x1 + dist * Math.cos(snapangle),
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y: y1 + dist * Math.sin(snapangle),
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a: snapangle
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};
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};
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/**
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* Check if two rectangles (BBoxes objects) intersect each other.
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* @function module:math.rectsIntersect
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* @param {SVGRect} r1 - The first BBox-like object
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* @param {SVGRect} r2 - The second BBox-like object
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* @returns {boolean} True if rectangles intersect
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*/
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export const rectsIntersect = function (r1, r2) {
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return r2.x < (r1.x + r1.width) &&
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(r2.x + r2.width) > r1.x &&
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r2.y < (r1.y + r1.height) &&
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(r2.y + r2.height) > r1.y;
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};
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@@ -1,393 +0,0 @@
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/**
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* Partial polyfill of `SVGTransformList`
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* @module SVGTransformList
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*
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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 {supportsNativeTransformLists} from './browser.js';
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const svgroot = document.createElementNS(NS.SVG, 'svg');
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/**
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* Helper function to convert `SVGTransform` to a string.
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* @param {SVGTransform} xform
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* @returns {string}
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*/
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function transformToString (xform) {
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const m = xform.matrix;
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let text = '';
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switch (xform.type) {
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case 1: // MATRIX
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text = 'matrix(' + [m.a, m.b, m.c, m.d, m.e, m.f].join(',') + ')';
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break;
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case 2: // TRANSLATE
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text = 'translate(' + m.e + ',' + m.f + ')';
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break;
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case 3: // SCALE
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text = (m.a === m.d) ? `scale(${m.a})` : `scale(${m.a},${m.d})`;
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break;
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case 4: { // ROTATE
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let cx = 0;
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let cy = 0;
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// this prevents divide by zero
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if (xform.angle !== 0) {
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const K = 1 - m.a;
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cy = (K * m.f + m.b * m.e) / (K * K + m.b * m.b);
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cx = (m.e - m.b * cy) / K;
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}
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text = 'rotate(' + xform.angle + ' ' + cx + ',' + cy + ')';
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break;
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}
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}
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return text;
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}
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/**
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* Map of SVGTransformList objects.
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*/
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let listMap_ = {};
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/**
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* @interface module:SVGTransformList.SVGEditTransformList
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* @property {Integer} numberOfItems unsigned long
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*/
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/**
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* @function module:SVGTransformList.SVGEditTransformList#clear
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* @returns {void}
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*/
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/**
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* @function module:SVGTransformList.SVGEditTransformList#initialize
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* @param {SVGTransform} newItem
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* @returns {SVGTransform}
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*/
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/**
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* DOES NOT THROW DOMException, INDEX_SIZE_ERR.
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* @function module:SVGTransformList.SVGEditTransformList#getItem
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* @param {Integer} index unsigned long
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* @returns {SVGTransform}
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*/
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/**
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* DOES NOT THROW DOMException, INDEX_SIZE_ERR.
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* @function module:SVGTransformList.SVGEditTransformList#insertItemBefore
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* @param {SVGTransform} newItem
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* @param {Integer} index unsigned long
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* @returns {SVGTransform}
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*/
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/**
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* DOES NOT THROW DOMException, INDEX_SIZE_ERR.
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* @function module:SVGTransformList.SVGEditTransformList#replaceItem
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* @param {SVGTransform} newItem
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* @param {Integer} index unsigned long
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* @returns {SVGTransform}
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*/
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/**
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* DOES NOT THROW DOMException, INDEX_SIZE_ERR.
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* @function module:SVGTransformList.SVGEditTransformList#removeItem
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* @param {Integer} index unsigned long
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* @returns {SVGTransform}
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*/
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/**
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* @function module:SVGTransformList.SVGEditTransformList#appendItem
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* @param {SVGTransform} newItem
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* @returns {SVGTransform}
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*/
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/**
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* NOT IMPLEMENTED.
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* @ignore
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* @function module:SVGTransformList.SVGEditTransformList#createSVGTransformFromMatrix
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* @param {SVGMatrix} matrix
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* @returns {SVGTransform}
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*/
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/**
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* NOT IMPLEMENTED.
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* @ignore
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* @function module:SVGTransformList.SVGEditTransformList#consolidate
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* @returns {SVGTransform}
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*/
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/**
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* SVGTransformList implementation for Webkit.
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* These methods do not currently raise any exceptions.
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* These methods also do not check that transforms are being inserted. This is basically
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* implementing as much of SVGTransformList that we need to get the job done.
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* @implements {module:SVGTransformList.SVGEditTransformList}
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*/
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export class SVGTransformList { // eslint-disable-line no-shadow
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/**
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* @param {Element} elem
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* @returns {SVGTransformList}
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*/
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constructor (elem) {
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this._elem = elem || null;
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this._xforms = [];
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// TODO: how do we capture the undo-ability in the changed transform list?
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this._update = function () {
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let tstr = '';
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// /* const concatMatrix = */ svgroot.createSVGMatrix();
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for (let i = 0; i < this.numberOfItems; ++i) {
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const xform = this._list.getItem(i);
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tstr += transformToString(xform) + ' ';
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}
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this._elem.setAttribute('transform', tstr);
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};
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this._list = this;
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this._init = function () {
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// Transform attribute parser
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let str = this._elem.getAttribute('transform');
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if (!str) { return; }
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// TODO: Add skew support in future
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const re = /\s*((scale|matrix|rotate|translate)\s*\(.*?\))\s*,?\s*/;
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// const re = /\s*(?<xform>(?:scale|matrix|rotate|translate)\s*\(.*?\))\s*,?\s*/;
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let m = true;
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while (m) {
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m = str.match(re);
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str = str.replace(re, '');
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if (m && m[1]) {
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const x = m[1];
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const bits = x.split(/\s*\(/);
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const name = bits[0];
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const valBits = bits[1].match(/\s*(.*?)\s*\)/);
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valBits[1] = valBits[1].replace(/(\d)-/g, '$1 -');
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const valArr = valBits[1].split(/[, ]+/);
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const letters = 'abcdef'.split('');
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/*
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if (m && m.groups.xform) {
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const x = m.groups.xform;
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const [name, bits] = x.split(/\s*\(/);
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const valBits = bits.match(/\s*(?<nonWhitespace>.*?)\s*\)/);
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valBits.groups.nonWhitespace = valBits.groups.nonWhitespace.replace(
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/(?<digit>\d)-/g, '$<digit> -'
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);
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const valArr = valBits.groups.nonWhitespace.split(/[, ]+/);
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const letters = [...'abcdef'];
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*/
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const mtx = svgroot.createSVGMatrix();
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Object.values(valArr).forEach(function (item, i) {
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valArr[i] = Number.parseFloat(item);
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if (name === 'matrix') {
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mtx[letters[i]] = valArr[i];
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}
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});
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const xform = svgroot.createSVGTransform();
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const fname = 'set' + name.charAt(0).toUpperCase() + name.slice(1);
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const values = name === 'matrix' ? [mtx] : valArr;
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if (name === 'scale' && values.length === 1) {
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values.push(values[0]);
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} else if (name === 'translate' && values.length === 1) {
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values.push(0);
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} else if (name === 'rotate' && values.length === 1) {
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values.push(0, 0);
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}
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xform[fname](...values);
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this._list.appendItem(xform);
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||||
}
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||||
}
|
||||
};
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this._removeFromOtherLists = function (item) {
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if (item) {
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||||
// Check if this transform is already in a transformlist, and
|
||||
// remove it if so.
|
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Object.values(listMap_).some((tl) => {
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for (let i = 0, len = tl._xforms.length; i < len; ++i) {
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if (tl._xforms[i] === item) {
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tl.removeItem(i);
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return true;
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||||
}
|
||||
}
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||||
return false;
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
this.numberOfItems = 0;
|
||||
}
|
||||
/**
|
||||
* @returns {void}
|
||||
*/
|
||||
clear () {
|
||||
this.numberOfItems = 0;
|
||||
this._xforms = [];
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {SVGTransform} newItem
|
||||
* @returns {void}
|
||||
*/
|
||||
initialize (newItem) {
|
||||
this.numberOfItems = 1;
|
||||
this._removeFromOtherLists(newItem);
|
||||
this._xforms = [newItem];
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {Integer} index unsigned long
|
||||
* @throws {Error}
|
||||
* @returns {SVGTransform}
|
||||
*/
|
||||
getItem (index) {
|
||||
if (index < this.numberOfItems && index >= 0) {
|
||||
return this._xforms[index];
|
||||
}
|
||||
const err = new Error('DOMException with code=INDEX_SIZE_ERR');
|
||||
err.code = 1;
|
||||
throw err;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {SVGTransform} newItem
|
||||
* @param {Integer} index unsigned long
|
||||
* @returns {SVGTransform}
|
||||
*/
|
||||
insertItemBefore (newItem, index) {
|
||||
let retValue = null;
|
||||
if (index >= 0) {
|
||||
if (index < this.numberOfItems) {
|
||||
this._removeFromOtherLists(newItem);
|
||||
const newxforms = new Array(this.numberOfItems + 1);
|
||||
// TODO: use array copying and slicing
|
||||
let i;
|
||||
for (i = 0; i < index; ++i) {
|
||||
newxforms[i] = this._xforms[i];
|
||||
}
|
||||
newxforms[i] = newItem;
|
||||
for (let j = i + 1; i < this.numberOfItems; ++j, ++i) {
|
||||
newxforms[j] = this._xforms[i];
|
||||
}
|
||||
this.numberOfItems++;
|
||||
this._xforms = newxforms;
|
||||
retValue = newItem;
|
||||
this._list._update();
|
||||
} else {
|
||||
retValue = this._list.appendItem(newItem);
|
||||
}
|
||||
}
|
||||
return retValue;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {SVGTransform} newItem
|
||||
* @param {Integer} index unsigned long
|
||||
* @returns {SVGTransform}
|
||||
*/
|
||||
replaceItem (newItem, index) {
|
||||
let retValue = null;
|
||||
if (index < this.numberOfItems && index >= 0) {
|
||||
this._removeFromOtherLists(newItem);
|
||||
this._xforms[index] = newItem;
|
||||
retValue = newItem;
|
||||
this._list._update();
|
||||
}
|
||||
return retValue;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {Integer} index unsigned long
|
||||
* @throws {Error}
|
||||
* @returns {SVGTransform}
|
||||
*/
|
||||
removeItem (index) {
|
||||
if (index < this.numberOfItems && index >= 0) {
|
||||
const retValue = this._xforms[index];
|
||||
const newxforms = new Array(this.numberOfItems - 1);
|
||||
let i;
|
||||
for (i = 0; i < index; ++i) {
|
||||
newxforms[i] = this._xforms[i];
|
||||
}
|
||||
for (let j = i; j < this.numberOfItems - 1; ++j, ++i) {
|
||||
newxforms[j] = this._xforms[i + 1];
|
||||
}
|
||||
this.numberOfItems--;
|
||||
this._xforms = newxforms;
|
||||
this._list._update();
|
||||
return retValue;
|
||||
}
|
||||
const err = new Error('DOMException with code=INDEX_SIZE_ERR');
|
||||
err.code = 1;
|
||||
throw err;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {SVGTransform} newItem
|
||||
* @returns {SVGTransform}
|
||||
*/
|
||||
appendItem (newItem) {
|
||||
this._removeFromOtherLists(newItem);
|
||||
this._xforms.push(newItem);
|
||||
this.numberOfItems++;
|
||||
this._list._update();
|
||||
return newItem;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @function module:SVGTransformList.resetListMap
|
||||
* @returns {void}
|
||||
*/
|
||||
export const resetListMap = function () {
|
||||
listMap_ = {};
|
||||
};
|
||||
|
||||
/**
|
||||
* Removes transforms of the given element from the map.
|
||||
* @function module:SVGTransformList.removeElementFromListMap
|
||||
* @param {Element} elem - a DOM Element
|
||||
* @returns {void}
|
||||
*/
|
||||
export let removeElementFromListMap = function (elem) { // eslint-disable-line import/no-mutable-exports
|
||||
if (elem.id && listMap_[elem.id]) {
|
||||
delete listMap_[elem.id];
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Returns an object that behaves like a `SVGTransformList` for the given DOM element.
|
||||
* @function module:SVGTransformList.getTransformList
|
||||
* @param {Element} elem - DOM element to get a transformlist from
|
||||
* @todo The polyfill should have `SVGAnimatedTransformList` and this should use it
|
||||
* @returns {SVGAnimatedTransformList|SVGTransformList}
|
||||
*/
|
||||
export const getTransformList = function (elem) {
|
||||
if (!supportsNativeTransformLists()) {
|
||||
const id = elem.id || 'temp';
|
||||
let t = listMap_[id];
|
||||
if (!t || id === 'temp') {
|
||||
listMap_[id] = new SVGTransformList(elem);
|
||||
listMap_[id]._init();
|
||||
t = listMap_[id];
|
||||
}
|
||||
return t;
|
||||
}
|
||||
if (elem.transform) {
|
||||
return elem.transform.baseVal;
|
||||
}
|
||||
if (elem.gradientTransform) {
|
||||
return elem.gradientTransform.baseVal;
|
||||
}
|
||||
if (elem.patternTransform) {
|
||||
return elem.patternTransform.baseVal;
|
||||
}
|
||||
|
||||
return null;
|
||||
};
|
||||
|
||||
/**
|
||||
* @callback module:SVGTransformList.removeElementFromListMap
|
||||
* @param {Element} elem
|
||||
* @returns {void}
|
||||
*/
|
||||
/**
|
||||
* Replace `removeElementFromListMap` for unit-testing.
|
||||
* @function module:SVGTransformList.changeRemoveElementFromListMap
|
||||
* @param {module:SVGTransformList.removeElementFromListMap} cb Passed a single argument `elem`
|
||||
* @returns {void}
|
||||
*/
|
||||
|
||||
export const changeRemoveElementFromListMap = function (cb) { // eslint-disable-line promise/prefer-await-to-callbacks
|
||||
removeElementFromListMap = cb;
|
||||
};
|
||||
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user