forked from zhurui/management
440 lines
11 KiB
JavaScript
440 lines
11 KiB
JavaScript
var Path = require("../graphic/Path");
|
|
|
|
var PathProxy = require("../core/PathProxy");
|
|
|
|
var transformPath = require("./transformPath");
|
|
|
|
// command chars
|
|
// var cc = [
|
|
// 'm', 'M', 'l', 'L', 'v', 'V', 'h', 'H', 'z', 'Z',
|
|
// 'c', 'C', 'q', 'Q', 't', 'T', 's', 'S', 'a', 'A'
|
|
// ];
|
|
var mathSqrt = Math.sqrt;
|
|
var mathSin = Math.sin;
|
|
var mathCos = Math.cos;
|
|
var PI = Math.PI;
|
|
|
|
var vMag = function (v) {
|
|
return Math.sqrt(v[0] * v[0] + v[1] * v[1]);
|
|
};
|
|
|
|
var vRatio = function (u, v) {
|
|
return (u[0] * v[0] + u[1] * v[1]) / (vMag(u) * vMag(v));
|
|
};
|
|
|
|
var vAngle = function (u, v) {
|
|
return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(vRatio(u, v));
|
|
};
|
|
|
|
function processArc(x1, y1, x2, y2, fa, fs, rx, ry, psiDeg, cmd, path) {
|
|
var psi = psiDeg * (PI / 180.0);
|
|
var xp = mathCos(psi) * (x1 - x2) / 2.0 + mathSin(psi) * (y1 - y2) / 2.0;
|
|
var yp = -1 * mathSin(psi) * (x1 - x2) / 2.0 + mathCos(psi) * (y1 - y2) / 2.0;
|
|
var lambda = xp * xp / (rx * rx) + yp * yp / (ry * ry);
|
|
|
|
if (lambda > 1) {
|
|
rx *= mathSqrt(lambda);
|
|
ry *= mathSqrt(lambda);
|
|
}
|
|
|
|
var f = (fa === fs ? -1 : 1) * mathSqrt((rx * rx * (ry * ry) - rx * rx * (yp * yp) - ry * ry * (xp * xp)) / (rx * rx * (yp * yp) + ry * ry * (xp * xp))) || 0;
|
|
var cxp = f * rx * yp / ry;
|
|
var cyp = f * -ry * xp / rx;
|
|
var cx = (x1 + x2) / 2.0 + mathCos(psi) * cxp - mathSin(psi) * cyp;
|
|
var cy = (y1 + y2) / 2.0 + mathSin(psi) * cxp + mathCos(psi) * cyp;
|
|
var theta = vAngle([1, 0], [(xp - cxp) / rx, (yp - cyp) / ry]);
|
|
var u = [(xp - cxp) / rx, (yp - cyp) / ry];
|
|
var v = [(-1 * xp - cxp) / rx, (-1 * yp - cyp) / ry];
|
|
var dTheta = vAngle(u, v);
|
|
|
|
if (vRatio(u, v) <= -1) {
|
|
dTheta = PI;
|
|
}
|
|
|
|
if (vRatio(u, v) >= 1) {
|
|
dTheta = 0;
|
|
}
|
|
|
|
if (fs === 0 && dTheta > 0) {
|
|
dTheta = dTheta - 2 * PI;
|
|
}
|
|
|
|
if (fs === 1 && dTheta < 0) {
|
|
dTheta = dTheta + 2 * PI;
|
|
}
|
|
|
|
path.addData(cmd, cx, cy, rx, ry, theta, dTheta, psi, fs);
|
|
}
|
|
|
|
var commandReg = /([mlvhzcqtsa])([^mlvhzcqtsa]*)/ig; // Consider case:
|
|
// (1) delimiter can be comma or space, where continuous commas
|
|
// or spaces should be seen as one comma.
|
|
// (2) value can be like:
|
|
// '2e-4', 'l.5.9' (ignore 0), 'M-10-10', 'l-2.43e-1,34.9983',
|
|
// 'l-.5E1,54', '121-23-44-11' (no delimiter)
|
|
|
|
var numberReg = /-?([0-9]*\.)?[0-9]+([eE]-?[0-9]+)?/g; // var valueSplitReg = /[\s,]+/;
|
|
|
|
function createPathProxyFromString(data) {
|
|
if (!data) {
|
|
return new PathProxy();
|
|
} // var data = data.replace(/-/g, ' -')
|
|
// .replace(/ /g, ' ')
|
|
// .replace(/ /g, ',')
|
|
// .replace(/,,/g, ',');
|
|
// var n;
|
|
// create pipes so that we can split the data
|
|
// for (n = 0; n < cc.length; n++) {
|
|
// cs = cs.replace(new RegExp(cc[n], 'g'), '|' + cc[n]);
|
|
// }
|
|
// data = data.replace(/-/g, ',-');
|
|
// create array
|
|
// var arr = cs.split('|');
|
|
// init context point
|
|
|
|
|
|
var cpx = 0;
|
|
var cpy = 0;
|
|
var subpathX = cpx;
|
|
var subpathY = cpy;
|
|
var prevCmd;
|
|
var path = new PathProxy();
|
|
var CMD = PathProxy.CMD; // commandReg.lastIndex = 0;
|
|
// var cmdResult;
|
|
// while ((cmdResult = commandReg.exec(data)) != null) {
|
|
// var cmdStr = cmdResult[1];
|
|
// var cmdContent = cmdResult[2];
|
|
|
|
var cmdList = data.match(commandReg);
|
|
|
|
for (var l = 0; l < cmdList.length; l++) {
|
|
var cmdText = cmdList[l];
|
|
var cmdStr = cmdText.charAt(0);
|
|
var cmd; // String#split is faster a little bit than String#replace or RegExp#exec.
|
|
// var p = cmdContent.split(valueSplitReg);
|
|
// var pLen = 0;
|
|
// for (var i = 0; i < p.length; i++) {
|
|
// // '' and other invalid str => NaN
|
|
// var val = parseFloat(p[i]);
|
|
// !isNaN(val) && (p[pLen++] = val);
|
|
// }
|
|
|
|
var p = cmdText.match(numberReg) || [];
|
|
var pLen = p.length;
|
|
|
|
for (var i = 0; i < pLen; i++) {
|
|
p[i] = parseFloat(p[i]);
|
|
}
|
|
|
|
var off = 0;
|
|
|
|
while (off < pLen) {
|
|
var ctlPtx;
|
|
var ctlPty;
|
|
var rx;
|
|
var ry;
|
|
var psi;
|
|
var fa;
|
|
var fs;
|
|
var x1 = cpx;
|
|
var y1 = cpy; // convert l, H, h, V, and v to L
|
|
|
|
switch (cmdStr) {
|
|
case 'l':
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'L':
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'm':
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
cmd = CMD.M;
|
|
path.addData(cmd, cpx, cpy);
|
|
subpathX = cpx;
|
|
subpathY = cpy;
|
|
cmdStr = 'l';
|
|
break;
|
|
|
|
case 'M':
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
cmd = CMD.M;
|
|
path.addData(cmd, cpx, cpy);
|
|
subpathX = cpx;
|
|
subpathY = cpy;
|
|
cmdStr = 'L';
|
|
break;
|
|
|
|
case 'h':
|
|
cpx += p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'H':
|
|
cpx = p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'v':
|
|
cpy += p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'V':
|
|
cpy = p[off++];
|
|
cmd = CMD.L;
|
|
path.addData(cmd, cpx, cpy);
|
|
break;
|
|
|
|
case 'C':
|
|
cmd = CMD.C;
|
|
path.addData(cmd, p[off++], p[off++], p[off++], p[off++], p[off++], p[off++]);
|
|
cpx = p[off - 2];
|
|
cpy = p[off - 1];
|
|
break;
|
|
|
|
case 'c':
|
|
cmd = CMD.C;
|
|
path.addData(cmd, p[off++] + cpx, p[off++] + cpy, p[off++] + cpx, p[off++] + cpy, p[off++] + cpx, p[off++] + cpy);
|
|
cpx += p[off - 2];
|
|
cpy += p[off - 1];
|
|
break;
|
|
|
|
case 'S':
|
|
ctlPtx = cpx;
|
|
ctlPty = cpy;
|
|
var len = path.len();
|
|
var pathData = path.data;
|
|
|
|
if (prevCmd === CMD.C) {
|
|
ctlPtx += cpx - pathData[len - 4];
|
|
ctlPty += cpy - pathData[len - 3];
|
|
}
|
|
|
|
cmd = CMD.C;
|
|
x1 = p[off++];
|
|
y1 = p[off++];
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
path.addData(cmd, ctlPtx, ctlPty, x1, y1, cpx, cpy);
|
|
break;
|
|
|
|
case 's':
|
|
ctlPtx = cpx;
|
|
ctlPty = cpy;
|
|
var len = path.len();
|
|
var pathData = path.data;
|
|
|
|
if (prevCmd === CMD.C) {
|
|
ctlPtx += cpx - pathData[len - 4];
|
|
ctlPty += cpy - pathData[len - 3];
|
|
}
|
|
|
|
cmd = CMD.C;
|
|
x1 = cpx + p[off++];
|
|
y1 = cpy + p[off++];
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
path.addData(cmd, ctlPtx, ctlPty, x1, y1, cpx, cpy);
|
|
break;
|
|
|
|
case 'Q':
|
|
x1 = p[off++];
|
|
y1 = p[off++];
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
cmd = CMD.Q;
|
|
path.addData(cmd, x1, y1, cpx, cpy);
|
|
break;
|
|
|
|
case 'q':
|
|
x1 = p[off++] + cpx;
|
|
y1 = p[off++] + cpy;
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
cmd = CMD.Q;
|
|
path.addData(cmd, x1, y1, cpx, cpy);
|
|
break;
|
|
|
|
case 'T':
|
|
ctlPtx = cpx;
|
|
ctlPty = cpy;
|
|
var len = path.len();
|
|
var pathData = path.data;
|
|
|
|
if (prevCmd === CMD.Q) {
|
|
ctlPtx += cpx - pathData[len - 4];
|
|
ctlPty += cpy - pathData[len - 3];
|
|
}
|
|
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
cmd = CMD.Q;
|
|
path.addData(cmd, ctlPtx, ctlPty, cpx, cpy);
|
|
break;
|
|
|
|
case 't':
|
|
ctlPtx = cpx;
|
|
ctlPty = cpy;
|
|
var len = path.len();
|
|
var pathData = path.data;
|
|
|
|
if (prevCmd === CMD.Q) {
|
|
ctlPtx += cpx - pathData[len - 4];
|
|
ctlPty += cpy - pathData[len - 3];
|
|
}
|
|
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
cmd = CMD.Q;
|
|
path.addData(cmd, ctlPtx, ctlPty, cpx, cpy);
|
|
break;
|
|
|
|
case 'A':
|
|
rx = p[off++];
|
|
ry = p[off++];
|
|
psi = p[off++];
|
|
fa = p[off++];
|
|
fs = p[off++];
|
|
x1 = cpx, y1 = cpy;
|
|
cpx = p[off++];
|
|
cpy = p[off++];
|
|
cmd = CMD.A;
|
|
processArc(x1, y1, cpx, cpy, fa, fs, rx, ry, psi, cmd, path);
|
|
break;
|
|
|
|
case 'a':
|
|
rx = p[off++];
|
|
ry = p[off++];
|
|
psi = p[off++];
|
|
fa = p[off++];
|
|
fs = p[off++];
|
|
x1 = cpx, y1 = cpy;
|
|
cpx += p[off++];
|
|
cpy += p[off++];
|
|
cmd = CMD.A;
|
|
processArc(x1, y1, cpx, cpy, fa, fs, rx, ry, psi, cmd, path);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (cmdStr === 'z' || cmdStr === 'Z') {
|
|
cmd = CMD.Z;
|
|
path.addData(cmd); // z may be in the middle of the path.
|
|
|
|
cpx = subpathX;
|
|
cpy = subpathY;
|
|
}
|
|
|
|
prevCmd = cmd;
|
|
}
|
|
|
|
path.toStatic();
|
|
return path;
|
|
} // TODO Optimize double memory cost problem
|
|
|
|
|
|
function createPathOptions(str, opts) {
|
|
var pathProxy = createPathProxyFromString(str);
|
|
opts = opts || {};
|
|
|
|
opts.buildPath = function (path) {
|
|
if (path.setData) {
|
|
path.setData(pathProxy.data); // Svg and vml renderer don't have context
|
|
|
|
var ctx = path.getContext();
|
|
|
|
if (ctx) {
|
|
path.rebuildPath(ctx);
|
|
}
|
|
} else {
|
|
var ctx = path;
|
|
pathProxy.rebuildPath(ctx);
|
|
}
|
|
};
|
|
|
|
opts.applyTransform = function (m) {
|
|
transformPath(pathProxy, m);
|
|
this.dirty(true);
|
|
};
|
|
|
|
return opts;
|
|
}
|
|
/**
|
|
* Create a Path object from path string data
|
|
* http://www.w3.org/TR/SVG/paths.html#PathData
|
|
* @param {Object} opts Other options
|
|
*/
|
|
|
|
|
|
function createFromString(str, opts) {
|
|
return new Path(createPathOptions(str, opts));
|
|
}
|
|
/**
|
|
* Create a Path class from path string data
|
|
* @param {string} str
|
|
* @param {Object} opts Other options
|
|
*/
|
|
|
|
|
|
function extendFromString(str, opts) {
|
|
return Path.extend(createPathOptions(str, opts));
|
|
}
|
|
/**
|
|
* Merge multiple paths
|
|
*/
|
|
// TODO Apply transform
|
|
// TODO stroke dash
|
|
// TODO Optimize double memory cost problem
|
|
|
|
|
|
function mergePath(pathEls, opts) {
|
|
var pathList = [];
|
|
var len = pathEls.length;
|
|
|
|
for (var i = 0; i < len; i++) {
|
|
var pathEl = pathEls[i];
|
|
|
|
if (!pathEl.path) {
|
|
pathEl.createPathProxy();
|
|
}
|
|
|
|
if (pathEl.__dirtyPath) {
|
|
pathEl.buildPath(pathEl.path, pathEl.shape, true);
|
|
}
|
|
|
|
pathList.push(pathEl.path);
|
|
}
|
|
|
|
var pathBundle = new Path(opts); // Need path proxy.
|
|
|
|
pathBundle.createPathProxy();
|
|
|
|
pathBundle.buildPath = function (path) {
|
|
path.appendPath(pathList); // Svg and vml renderer don't have context
|
|
|
|
var ctx = path.getContext();
|
|
|
|
if (ctx) {
|
|
path.rebuildPath(ctx);
|
|
}
|
|
};
|
|
|
|
return pathBundle;
|
|
}
|
|
|
|
exports.createFromString = createFromString;
|
|
exports.extendFromString = extendFromString;
|
|
exports.mergePath = mergePath; |