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Commit 7524b9fe by Dmitry Baranovskiy
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Refactor getLength & getPointAtLength again

parent 622bf9ae
Showing with 100 additions and 102 deletions
raphael-min.js
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raphael.js
......@@ -4,8 +4,8 @@
* Copyright (c) 2008 - 2009 Dmitry Baranovskiy (http://raphaeljs.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*/
window.Raphael = (function () {
var separator = /[, ]+/,
elements = /^(circle|rect|path|ellipse|text|image)$/,
......@@ -44,7 +44,6 @@ window.Raphael = (function () {
math = Math,
mmax = math.max,
mmin = math.min,
abs = math.abs,
nu = "number",
toString = "toString",
objectToString = Object[proto][toString],
......@@ -220,7 +219,7 @@ window.Raphael = (function () {
}
return newf;
}
R.getRGB = cacher(function (colour) {
if (!colour || !!((colour = colour + E).indexOf("-") + 1)) {
return {r: -1, g: -1, b: -1, hex: "none", error: 1};
......@@ -326,7 +325,7 @@ window.Raphael = (function () {
data[toString] = R._path2string;
return data;
});
R.findDotsAtSegment = cacher(function (p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
R.findDotsAtSegment = function (p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t) {
var t1 = 1 - t,
x = pow(t1, 3) * p1x + pow(t1, 2) * 3 * t * c1x + t1 * 3 * t * t * c2x + pow(t, 3) * p2x,
y = pow(t1, 3) * p1y + pow(t1, 2) * 3 * t * c1y + t1 * 3 * t * t * c2y + pow(t, 3) * p2y,
......@@ -337,9 +336,10 @@ window.Raphael = (function () {
ax = (1 - t) * p1x + t * c1x,
ay = (1 - t) * p1y + t * c1y,
cx = (1 - t) * c2x + t * p2x,
cy = (1 - t) * c2y + t * p2y;
return {x: x, y: y, m: {x: mx, y: my}, n: {x: nx, y: ny}, start: {x: ax, y: ay}, end: {x: cx, y: cy}};
});
cy = (1 - t) * c2y + t * p2y,
alpha = (90 - math.atan((mx - nx) / (my - ny)) * 180 / math.PI) % 360;
return {x: x, y: y, m: {x: mx, y: my}, n: {x: nx, y: ny}, start: {x: ax, y: ay}, end: {x: cx, y: cy}, alpha: alpha};
};
var pathDimensions = cacher(function (path) {
if (!path) {
return {x: 0, y: 0, width: 0, height: 0};
......@@ -572,17 +572,17 @@ window.Raphael = (function () {
sin = math.sin(PI / 180 * angle),
x = (x1 - x2) / 2,
y = (y1 - y2) / 2;
rx = mmax(rx, abs(x));
ry = mmax(ry, abs(y));
rx = mmax(rx, math.abs(x));
ry = mmax(ry, math.abs(y));
var rx2 = rx * rx,
ry2 = ry * ry,
k = (large_arc_flag == sweep_flag ? -1 : 1) *
math.sqrt(abs((rx2 * ry2 - rx2 * y * y - ry2 * x * x) / (rx2 * y * y + ry2 * x * x))),
math.sqrt(math.abs((rx2 * ry2 - rx2 * y * y - ry2 * x * x) / (rx2 * y * y + ry2 * x * x))),
cx = k * rx * y / ry + (x1 + x2) / 2,
cy = k * -ry * x / rx + (y1 + y2) / 2,
f1 = math.asin(((y1 - cy) / ry).toFixed(7)),
f2 = math.asin(((y2 - cy) / ry).toFixed(7));
f1 = x1 < cx ? PI - f1 : f1;
f2 = x2 < cx ? PI - f2 : f2;
f1 < 0 && (f1 = PI * 2 + f1);
......@@ -600,7 +600,7 @@ window.Raphael = (function () {
cy = recursive[3];
}
var df = f2 - f1;
if (abs(df) > _120) {
if (math.abs(df) > _120) {
var f2old = f2,
x2old = x2,
y2old = y2;
......@@ -650,8 +650,8 @@ window.Raphael = (function () {
y = [p1y, p2y],
x = [p1x, p2x],
dot;
abs(t1) > 1e12 && (t1 = .5);
abs(t2) > 1e12 && (t2 = .5);
math.abs(t1) > 1e12 && (t1 = .5);
math.abs(t2) > 1e12 && (t2 = .5);
if (t1 > 0 && t1 < 1) {
dot = findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t1);
x[push](dot.x);
......@@ -667,8 +667,8 @@ window.Raphael = (function () {
c = p1y - c1y;
t1 = (-b + math.sqrt(b * b - 4 * a * c)) / 2 / a;
t2 = (-b - math.sqrt(b * b - 4 * a * c)) / 2 / a;
abs(t1) > 1e12 && (t1 = .5);
abs(t2) > 1e12 && (t2 = .5);
math.abs(t1) > 1e12 && (t1 = .5);
math.abs(t2) > 1e12 && (t2 = .5);
if (t1 > 0 && t1 < 1) {
dot = findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, t1);
x[push](dot.x);
......@@ -907,7 +907,7 @@ window.Raphael = (function () {
};
},
radial_gradient = /^r(?:\(([^,]+?)\s*,\s*([^\)]+?)\))?/;
// SVG
if (R.svg) {
Paper[proto].svgns = "http://www.w3.org/2000/svg";
......@@ -973,7 +973,7 @@ window.Raphael = (function () {
return null;
}
var vector = [0, 0, math.cos(angle * math.PI / 180), math.sin(angle * math.PI / 180)],
max = 1 / (mmax(abs(vector[2]), abs(vector[3])) || 1);
max = 1 / (mmax(math.abs(vector[2]), math.abs(vector[3])) || 1);
vector[2] *= max;
vector[3] *= max;
if (vector[2] < 0) {
......@@ -1201,7 +1201,7 @@ window.Raphael = (function () {
$(ig, {x: 0, y: 0});
ig.setAttributeNS(o.paper.xlink, "href", isURL[1]);
el[appendChild](ig);
var img = doc.createElement("img");
img.style.cssText = "position:absolute;left:-9999em;top-9999em";
img.onload = function () {
......@@ -1276,7 +1276,7 @@ window.Raphael = (function () {
var a = el.attrs,
node = el.node,
fontSize = node.firstChild ? toInt(doc.defaultView.getComputedStyle(node.firstChild, E).getPropertyValue("font-size"), 10) : 10;
if (params[has]("text")) {
a.text = params.text;
while (node.firstChild) {
......@@ -1498,19 +1498,19 @@ window.Raphael = (function () {
insertbefore(this, element, this.paper);
return this;
};
Element[proto].getTotalLength = function () {
if (this.type != "path") {
return -1;
}
return this.node.getTotalLength();
};
Element[proto].getPointAtLength = function (length) {
if (this.type != "path") {
return -1;
}
var point = this.node.getPointAtLength(length);
return {x: point.x, y: point.y};
};
// Element[proto].getTotalLength = function () {
// if (this.type != "path") {
// return -1;
// }
// return this.node.getTotalLength();
// };
// Element[proto].getPointAtLength = function (length) {
// if (this.type != "path") {
// return -1;
// }
// var point = this.node.getPointAtLength(length);
// return {x: point.x, y: point.y};
// };
var theCircle = function (svg, x, y, r) {
x = round(x);
y = round(y);
......@@ -1625,7 +1625,7 @@ window.Raphael = (function () {
}
};
}
// VML
if (R.vml) {
var path2vml = function (path) {
......@@ -1657,16 +1657,6 @@ window.Raphael = (function () {
res[push](r);
}
return res[join](S);
},
segmentLength = function (p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {
var old = {x: 0, y: 0},
len = 0;
for (var i = 0; i < 1.01; i+=.01) {
var dot = findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, i);
i && (len += math.sqrt(pow(old.x - dot.x, 2) + pow(old.y - dot.y, 2)));
old = dot;
}
return len;
};
R[toString] = function () {
......@@ -1858,7 +1848,7 @@ window.Raphael = (function () {
res.H = a.h = res.paper.span.offsetHeight;
res.X = a.x;
res.Y = a.y + round(res.H / 2);
// text-anchor emulationm
switch (a["text-anchor"]) {
case "start":
......@@ -2225,34 +2215,7 @@ window.Raphael = (function () {
insertbefore(this, element, this.paper);
return this;
};
var getLengthFactory = function (istotal) {
return function (length) {
if (this.type != "path") {
return -1;
}
var path = path2curve(this.attrs.path), x, y, p, l,
len = 0;
for (var i = 0, ii = path.length; i < ii; i++) {
p = path[i];
if (p[0] == "M") {
x = +p[1];
y = +p[2];
} else {
l = segmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
if (!istotal && len + l > length) {
return findDotAtSegment(x, y, p[1], p[2], p[3], p[4], p[5], p[6], (length - len) / l);
}
len += l;
x = +p[5];
y = +p[6];
}
}
return istotal ? len : {x: x, y: y};
};
};
Element[proto].getTotalLength = getLengthFactory(1);
Element[proto].getPointAtLength = getLengthFactory();
var theCircle = function (vml, x, y, r) {
var g = createNode("group"),
o = createNode("oval"),
......@@ -2437,7 +2400,7 @@ window.Raphael = (function () {
}
};
}
// rest
// Safari or Chrome (WebKit) rendering bug workaround method
if ((/^Apple|^Google/).test(navigator.vendor) && !(navigator.userAgent.indexOf("Version/4.0") + 1)) {
......@@ -2448,7 +2411,7 @@ window.Raphael = (function () {
} else {
Paper[proto].safari = function () {};
}
// Events
var addEvent = (function () {
if (doc.addEventListener) {
......@@ -2552,25 +2515,23 @@ window.Raphael = (function () {
var bb = this.getBBox(),
rcx = bb.x + bb.width / 2,
rcy = bb.y + bb.height / 2,
kx = abs(x / this._.sx),
ky = abs(y / this._.sy);
kx = x / this._.sx,
ky = y / this._.sy;
cx = (+cx || cx == 0) ? cx : rcx;
cy = (+cy || cy == 0) ? cy : rcy;
var dirx = ~~(x / abs(x)),
diry = ~~(y / abs(y)),
dkx = kx * dirx,
dky = ky * diry,
var dirx = ~~(x / math.abs(x)),
diry = ~~(y / math.abs(y)),
s = this.node.style,
ncx = cx - abs(rcx - cx) * dkx,
ncy = cy - abs(rcy - cy) * dky;
ncx = cx + (rcx - cx) * kx,
ncy = cy + (rcy - cy) * ky;
switch (this.type) {
case "rect":
case "image":
var neww = a.width * kx,
newh = a.height * ky;
var neww = a.width * dirx * kx,
hewh = a.height * diry * ky;
this.attr({
height: newh,
r: a.r * mmin(kx, ky),
r: a.r * mmin(dirx * kx, diry * ky),
width: neww,
x: ncx - neww / 2,
y: ncy - newh / 2
......@@ -2579,9 +2540,9 @@ window.Raphael = (function () {
case "circle":
case "ellipse":
this.attr({
rx: a.rx * kx,
ry: a.ry * ky,
r: a.r * mmin(kx, ky),
rx: a.rx * dirx * kx,
ry: a.ry * diry * ky,
r: a.r * mmin(dirx * kx, diry * ky),
cx: ncx,
cy: ncy
});
......@@ -2599,22 +2560,22 @@ window.Raphael = (function () {
skip = false;
}
if (P0 == "A") {
p[path[i][length] - 2] = abs(p[path[i][length] - 2]) * dkx;
p[path[i][length] - 1] = abs(p[path[i][length] - 1]) * dky;
p[1] *= kx;
p[2] *= ky;
p[5] = +(dirx + diry ? !+p[4] : !!+p[4]);
p[path[i][length] - 2] *= kx;
p[path[i][length] - 1] *= ky;
p[1] *= dirx * kx;
p[2] *= diry * ky;
p[5] = +(dirx + diry ? !!+p[5] : !+p[5]);
} else if (P0 == "H") {
for (j = 1, jj = p[length]; j < jj; j++) {
p[j] = abs(p[j]) * dkx;
p[j] *= kx;
}
} else if (P0 == "V") {
for (j = 1, jj = p[length]; j < jj; j++) {
p[j] = abs(p[j]) * dky;
p[j] *= ky;
}
} else {
for (j = 1, jj = p[length]; j < jj; j++) {
p[j] = abs(p[j]) * ( (j % 2) ? dkx : dky );
p[j] *= (j % 2) ? kx : ky;
}
}
}
......@@ -2664,6 +2625,43 @@ window.Raphael = (function () {
delete attr.translation;
return this.paper[this.type]().attr(attr);
};
var getLengthFactory = function (istotal) {
return function (length) {
if (this.type != "path") {
return -1;
}
var path = path2curve(this.attrs.path), x, y, p, l,
len = 0;
for (var i = 0, ii = path.length; i < ii; i++) {
p = path[i];
if (p[0] == "M") {
x = +p[1];
y = +p[2];
} else {
l = segmentLength(x, y, p[1], p[2], p[3], p[4], p[5], p[6]);
if (!istotal && len + l > length) {
return R.findDotsAtSegment(x, y, p[1], p[2], p[3], p[4], p[5], p[6], (length - len) / l);
}
len += l;
x = +p[5];
y = +p[6];
}
}
return istotal ? len : R.findDotsAtSegment(x, y, p[1], p[2], p[3], p[4], p[5], p[6], 1);
};
},
segmentLength = function (p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y) {
var old = {x: 0, y: 0},
len = 0;
for (var i = 0; i < 1.01; i+=.01) {
var dot = findDotAtSegment(p1x, p1y, c1x, c1y, c2x, c2y, p2x, p2y, i);
i && (len += math.sqrt(pow(old.x - dot.x, 2) + pow(old.y - dot.y, 2)));
old = dot;
}
return len;
};
Element[proto].getTotalLength = getLengthFactory(1);
Element[proto].getPointAtLength = getLengthFactory();
// animation easing formulas
R.easing_formulas = {
......@@ -2724,7 +2722,7 @@ window.Raphael = (function () {
return l;
}
};
var animationElements = {length : 0},
animation = function () {
var Now = +new Date;
......@@ -2947,7 +2945,7 @@ window.Raphael = (function () {
return "Rapha\xebl\u2019s object";
};
R.ae = animationElements;
// Set
var Set = function (items) {
this.items = [];
......@@ -3043,7 +3041,7 @@ window.Raphael = (function () {
height: mmax[apply](0, h) - y
};
};
R.registerFont = function (font) {
if (!font.face) {
return font;
......@@ -3131,7 +3129,7 @@ window.Raphael = (function () {
}
return out;
};
R.format = function (token) {
var args = R.is(arguments[1], "array") ? [0][concat](arguments[1]) : arguments,
rg = /\{(\d+)\}/g;
......
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