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tagcanvas.js
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/**
* Copyright (C) 2010-2013 Graham Breach
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* TagCanvas 2.2
* For more information, please contact <[email protected]>
*/
(function(){
"use strict";
var i, j, abs = Math.abs, sin = Math.sin, cos = Math.cos, max = Math.max,
min = Math.min, ceil = Math.ceil, sqrt = Math.sqrt, pow = Math.pow,
hexlookup3 = {}, hexlookup2 = {}, hexlookup1 = {
0:"0,", 1:"17,", 2:"34,", 3:"51,", 4:"68,", 5:"85,",
6:"102,", 7:"119,", 8:"136,", 9:"153,", a:"170,", A:"170,",
b:"187,", B:"187,", c:"204,", C:"204,", d:"221,", D:"221,",
e:"238,", E:"238,", f:"255,", F:"255,"
}, Oproto, Tproto, TCproto, Mproto, Vproto, TSproto, doc = document, ocanvas,
handlers = {};
for(i = 0; i < 256; ++i) {
j = i.toString(16);
if(i < 16)
j = '0' + j;
hexlookup2[j] = hexlookup2[j.toUpperCase()] = i.toString() + ',';
}
function Defined(d) {
return typeof d != 'undefined';
}
function IsObject(o) {
return typeof o == 'object' && o != null;
}
function Clamp(v, mn, mx) {
return isNaN(v) ? mx : min(mx, max(mn, v));
}
function Nop() {
return false;
}
function TimeNow() {
return new Date().valueOf();
}
function SortList(l, f) {
var nl = [], tl = l.length, i;
for(i = 0; i < tl; ++i)
nl.push(l[i]);
nl.sort(f);
return nl;
}
function Shuffle(a) {
var i = a.length-1, t, p;
while(i) {
p = ~~(Math.random()*i);
t = a[i];
a[i] = a[p];
a[p] = t;
--i;
}
}
function Vector(x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Vproto = Vector.prototype;
Vproto.length = function() {
return sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
};
Vproto.dot = function(v) {
return this.x * v.x + this.y * v.y + this.z * v.z;
};
Vproto.cross = function(v) {
var x = this.y * v.z - this.z * v.y,
y = this.z * v.x - this.x * v.z,
z = this.x * v.y - this.y * v.x;
return new Vector(x, y, z);
};
Vproto.angle = function(v) {
var dot = this.dot(v), ac;
if(dot == 0)
return Math.PI / 2.0;
ac = dot / (this.length() * v.length());
if(ac >= 1)
return 0;
if(ac <= -1)
return Math.PI;
return Math.acos(ac);
};
Vproto.unit = function() {
var l = this.length();
return new Vector(this.x / l, this.y / l, this.z / l);
};
function MakeVector(lg, lt) {
lt = lt * Math.PI / 180;
lg = lg * Math.PI / 180;
var x = sin(lg) * cos(lt), y = -sin(lt), z = -cos(lg) * cos(lt);
return new Vector(x, y, z);
}
function Matrix(a) {
this[1] = {1: a[0], 2: a[1], 3: a[2]};
this[2] = {1: a[3], 2: a[4], 3: a[5]};
this[3] = {1: a[6], 2: a[7], 3: a[8]};
}
Mproto = Matrix.prototype;
Matrix.Identity = function() {
return new Matrix([1,0,0, 0,1,0, 0,0,1]);
};
Matrix.Rotation = function(angle, u) {
var sina = sin(angle), cosa = cos(angle), mcos = 1 - cosa;
return new Matrix([
cosa + pow(u.x, 2) * mcos, u.x * u.y * mcos - u.z * sina, u.x * u.z * mcos + u.y * sina,
u.y * u.x * mcos + u.z * sina, cosa + pow(u.y, 2) * mcos, u.y * u.z * mcos - u.x * sina,
u.z * u.x * mcos - u.y * sina, u.z * u.y * mcos + u.x * sina, cosa + pow(u.z, 2) * mcos
]);
}
Mproto.mul = function(m) {
var a = [], i, j, mmatrix = (m.xform ? 1 : 0);
for(i = 1; i <= 3; ++i)
for(j = 1; j <= 3; ++j) {
if(mmatrix)
a.push(this[i][1] * m[1][j] +
this[i][2] * m[2][j] +
this[i][3] * m[3][j]);
else
a.push(this[i][j] * m);
}
return new Matrix(a);
};
Mproto.xform = function(p) {
var a = {}, x = p.x, y = p.y, z = p.z;
a.x = x * this[1][1] + y * this[2][1] + z * this[3][1];
a.y = x * this[1][2] + y * this[2][2] + z * this[3][2];
a.z = x * this[1][3] + y * this[2][3] + z * this[3][3];
return a;
};
function PointsOnSphere(n,xr,yr,zr) {
var i, y, r, phi, pts = [], inc = Math.PI * (3-sqrt(5)), off = 2/n;
for(i = 0; i < n; ++i) {
y = i * off - 1 + (off / 2);
r = sqrt(1 - y*y);
phi = i * inc;
pts.push([cos(phi) * r * xr, y * yr, sin(phi) * r * zr]);
}
return pts;
}
function Cylinder(n,o,xr,yr,zr) {
var phi, pts = [], inc = Math.PI * (3-sqrt(5)), off = 2/n, i, j, k, l;
for(i = 0; i < n; ++i) {
j = i * off - 1 + (off / 2);
phi = i * inc;
k = cos(phi);
l = sin(phi);
pts.push(o ? [j * xr, k * yr, l * zr] : [k * xr, j * yr, l * zr]);
}
return pts;
}
function Ring(o, n, xr, yr, zr, j) {
var phi, pts = [], inc = Math.PI * 2 / n, i, k, l;
for(i = 0; i < n; ++i) {
phi = i * inc;
k = cos(phi);
l = sin(phi);
pts.push(o ? [j * xr, k * yr, l * zr] : [k * xr, j * yr, l * zr]);
}
return pts;
}
function PointsOnCylinderV(n,xr,yr,zr) { return Cylinder(n, 0, xr, yr, zr) }
function PointsOnCylinderH(n,xr,yr,zr) { return Cylinder(n, 1, xr, yr, zr) }
function PointsOnRingV(n, xr, yr, zr, offset) {
offset = isNaN(offset) ? 0 : offset * 1;
return Ring(0, n, xr, yr, zr, offset);
}
function PointsOnRingH(n, xr, yr, zr, offset) {
offset = isNaN(offset) ? 0 : offset * 1;
return Ring(1, n, xr, yr, zr, offset);
}
function SetAlpha(c,a) {
var d = c, p1, p2, ae = (a*1).toPrecision(3) + ')';
if(c[0] === '#') {
if(!hexlookup3[c])
if(c.length === 4)
hexlookup3[c] = 'rgba(' + hexlookup1[c[1]] + hexlookup1[c[2]] + hexlookup1[c[3]];
else
hexlookup3[c] = 'rgba(' + hexlookup2[c.substr(1,2)] + hexlookup2[c.substr(3,2)] + hexlookup2[c.substr(5,2)];
d = hexlookup3[c] + ae;
} else if(c.substr(0,4) === 'rgb(' || c.substr(0,4) === 'hsl(') {
d = (c.replace('(','a(').replace(')', ',' + ae));
} else if(c.substr(0,5) === 'rgba(' || c.substr(0,5) === 'hsla(') {
p1 = c.lastIndexOf(',') + 1, p2 = c.indexOf(')');
a *= parseFloat(c.substring(p1,p2));
d = c.substr(0,p1) + a.toPrecision(3) + ')';
}
return d;
}
function NewCanvas(w,h) {
// if using excanvas, give up now
if(window.G_vmlCanvasManager)
return null;
var c = doc.createElement('canvas');
c.width = w;
c.height = h;
return c;
}
// I think all browsers pass this test now...
function ShadowAlphaBroken() {
var cv = NewCanvas(3,3), c, i;
if(!cv)
return false;
c = cv.getContext('2d');
c.strokeStyle = '#000';
c.shadowColor = '#fff';
c.shadowBlur = 3;
c.globalAlpha = 0;
c.strokeRect(2,2,2,2);
c.globalAlpha = 1;
i = c.getImageData(2,2,1,1);
cv = null;
return (i.data[0] > 0);
}
function FindGradientColour(t,p) {
var l = 1024, g = t.weightGradient, cv, c, i, gd, d;
if(t.gCanvas) {
c = t.gCanvas.getContext('2d');
} else {
t.gCanvas = cv = NewCanvas(l,1);
if(!cv)
return null;
c = cv.getContext('2d');
gd = c.createLinearGradient(0,0,l,0);
for(i in g)
gd.addColorStop(1-i, g[i]);
c.fillStyle = gd;
c.fillRect(0,0,l,1);
}
d = c.getImageData(~~((l-1)*p),0,1,1).data;
return 'rgba(' + d[0] + ',' + d[1] + ',' + d[2] + ',' + (d[3]/255) + ')';
}
function TextSet(c,f,l,s,sc,sb,so,wm,wl) {
var xo = (sb || 0) + (so && so[0] < 0 ? abs(so[0]) : 0),
yo = (sb || 0) + (so && so[1] < 0 ? abs(so[1]) : 0), i, xc;
c.font = f;
c.textBaseline = 'top';
c.fillStyle = l;
sc && (c.shadowColor = sc);
sb && (c.shadowBlur = sb);
so && (c.shadowOffsetX = so[0], c.shadowOffsetY = so[1]);
for(i = 0; i < s.length; ++i) {
xc = wl ? (wm - wl[i]) / 2 : 0;
c.fillText(s[i], xo + xc, yo);
yo += parseInt(f);
}
}
function TextToCanvas(s,f,ht,w,h,l,sc,sb,so,padx,pady,wmax,wlist) {
var cw = w + abs(so[0]) + sb + sb, ch = h + abs(so[1]) + sb + sb, cv, c;
cv = NewCanvas(cw+padx,ch+pady);
if(!cv)
return null;
c = cv.getContext('2d');
TextSet(c,f,l,s,sc,sb,so,wmax,wlist);
return cv;
}
function AddShadowToImage(i,sc,sb,so) {
var sw = abs(so[0]), sh = abs(so[1]),
cw = i.width + (sw > sb ? sw + sb : sb * 2),
ch = i.height + (sh > sb ? sh + sb : sb * 2),
xo = (sb || 0) + (so[0] < 0 ? sw : 0),
yo = (sb || 0) + (so[1] < 0 ? sh : 0), cv, c;
cv = NewCanvas(cw, ch);
if(!cv)
return null;
c = cv.getContext('2d');
sc && (c.shadowColor = sc);
sb && (c.shadowBlur = sb);
so && (c.shadowOffsetX = so[0], c.shadowOffsetY = so[1]);
c.drawImage(i, xo, yo, i.width, i.height);
return cv;
}
function FindTextBoundingBox(s,f,ht) {
var w = parseInt(s.toString().length * ht), h = parseInt(ht * 2 * s.length),
cv = NewCanvas(w,h), c, idata, w1, h1, x, y, i, ex;
if(!cv)
return null;
c = cv.getContext('2d');
c.fillStyle = '#000';
c.fillRect(0,0,w,h);
TextSet(c,ht + 'px ' + f,'#fff',s,0,0,[])
idata = c.getImageData(0,0,w,h);
w1 = idata.width; h1 = idata.height;
ex = {
min: { x: w1, y: h1 },
max: { x: -1, y: -1 }
};
for(y = 0; y < h1; ++y) {
for(x = 0; x < w1; ++x) {
i = (y * w1 + x) * 4;
if(idata.data[i+1] > 0) {
if(x < ex.min.x) ex.min.x = x;
if(x > ex.max.x) ex.max.x = x;
if(y < ex.min.y) ex.min.y = y;
if(y > ex.max.y) ex.max.y = y;
}
}
}
// device pixels might not be css pixels
if(w1 != w) {
ex.min.x *= (w / w1);
ex.max.x *= (w / w1);
}
if(h1 != h) {
ex.min.y *= (w / h1);
ex.max.y *= (w / h1);
}
cv = null;
return ex;
}
function FixFont(f) {
return "'" + f.replace(/(\'|\")/g,'').replace(/\s*,\s*/g, "', '") + "'";
}
function AddHandler(h,f,e) {
e = e || doc;
if(e.addEventListener)
e.addEventListener(h,f,false);
else
e.attachEvent('on' + h, f);
}
function AddImage(i, o, t, tc) {
var s = tc.imageScale, ic;
// image not loaded, wait for image onload
if(!o.complete)
return AddHandler('load',function() { AddImage(i,o,t,tc); }, o);
if(!i.complete)
return AddHandler('load',function() { AddImage(i,o,t,tc); }, i);
// Yes, this does look like nonsense, but it makes sure that both the
// width and height are actually set and not just calculated. This is
// required to keep proportional sizes when the images are hidden, so
// the images can be used again for another cloud.
o.width = o.width;
o.height = o.height;
if(s) {
i.width = o.width * s;
i.height = o.height * s;
}
t.w = i.width;
t.h = i.height;
if(tc.txtOpt && tc.shadow) {
ic = AddShadowToImage(i, tc.shadow, tc.shadowBlur, tc.shadowOffset);
if(ic) {
t.image = ic;
t.w = ic.width;
t.h = ic.height;
}
}
}
function GetProperty(e,p) {
var dv = doc.defaultView, pc = p.replace(/\-([a-z])/g,function(a){return a.charAt(1).toUpperCase()});
return (dv && dv.getComputedStyle && dv.getComputedStyle(e,null).getPropertyValue(p)) ||
(e.currentStyle && e.currentStyle[pc]);
}
function FindWeight(t,a) {
var w = 1, p;
if(t.weightFrom) {
w = 1 * (a.getAttribute(t.weightFrom) || t.textHeight);
} else if(p = GetProperty(a,'font-size')) {
w = (p.indexOf('px') > -1 && p.replace('px','') * 1) ||
(p.indexOf('pt') > -1 && p.replace('pt','') * 1.25) ||
p * 3.3;
} else {
t.weight = false;
}
return w;
}
function EventToCanvasId(e) {
return e.target && Defined(e.target.id) ? e.target.id :
e.srcElement.parentNode.id;
}
function EventXY(e, c) {
var xy, p, xmul = parseInt(GetProperty(c, 'width')) / c.width,
ymul = parseInt(GetProperty(c, 'height')) / c.height;
if(Defined(e.offsetX)) {
xy = {x: e.offsetX, y: e.offsetY};
} else {
p = AbsPos(c.id);
if(Defined(e.changedTouches))
e = e.changedTouches[0];
if(e.pageX)
xy = {x: e.pageX - p.x, y: e.pageY - p.y};
}
if(xy && xmul && ymul) {
xy.x /= xmul;
xy.y /= ymul;
}
return xy;
}
function MouseOut(e) {
var cv = e.target || e.fromElement.parentNode, tc = TagCanvas.tc[cv.id];
if(tc) {
tc.mx = tc.my = -1;
tc.UnFreeze();
tc.EndDrag();
}
}
function MouseMove(e) {
var i, t = TagCanvas, tc, p, tg = EventToCanvasId(e);
for(i in t.tc) {
tc = t.tc[i];
if(tc.tttimer) {
clearTimeout(tc.tttimer);
tc.tttimer = null;
}
}
if(tg && t.tc[tg]) {
tc = t.tc[tg];
if(p = EventXY(e, tc.canvas)) {
tc.mx = p.x;
tc.my = p.y;
tc.Drag(e, p);
}
tc.drawn = 0;
}
}
function MouseDown(e) {
var t = TagCanvas, cb = doc.addEventListener ? 0 : 1,
tg = EventToCanvasId(e);
if(tg && e.button == cb && t.tc[tg]) {
t.tc[tg].BeginDrag(e);
}
}
function MouseUp(e) {
var t = TagCanvas, cb = doc.addEventListener ? 0 : 1,
tg = EventToCanvasId(e), tc;
if(tg && e.button == cb && t.tc[tg]) {
tc = t.tc[tg];
MouseMove(e);
if(!tc.EndDrag() && !tc.touched)
tc.Clicked(e);
}
}
function TouchDown(e) {
var t = TagCanvas, tg = EventToCanvasId(e);
if(tg && e.changedTouches && t.tc[tg]) {
t.tc[tg].touched = 1;
t.tc[tg].BeginDrag(e);
}
}
function TouchUp(e) {
var t = TagCanvas, tg = EventToCanvasId(e);
if(tg && e.changedTouches && t.tc[tg]) {
TouchMove(e);
if(!t.tc[tg].EndDrag()){
t.tc[tg].Draw();
t.tc[tg].Clicked(e);
}
}
}
function TouchMove(e) {
var i, t = TagCanvas, tc, p, tg = EventToCanvasId(e);
for(i in t.tc) {
tc = t.tc[i];
if(tc.tttimer) {
clearTimeout(tc.tttimer);
tc.tttimer = null;
}
}
if(tg && t.tc[tg] && e.changedTouches) {
tc = t.tc[tg];
if(p = EventXY(e, tc.canvas)) {
tc.mx = p.x;
tc.my = p.y;
tc.Drag(e, p);
}
tc.drawn = 0;
}
}
function MouseWheel(e) {
var t = TagCanvas, tg = EventToCanvasId(e);
if(tg && t.tc[tg]) {
e.cancelBubble = true;
e.returnValue = false;
e.preventDefault && e.preventDefault();
t.tc[tg].Wheel((e.wheelDelta || e.detail) > 0);
}
}
function DrawCanvas(t) {
var tc = TagCanvas.tc, i, interval;
t = t || TimeNow();
for(i in tc) {
interval = tc[i].interval;
tc[i].Draw(t);
}
TagCanvas.NextFrame(interval);
}
function AbsPos(id) {
var e = doc.getElementById(id), r = e.getBoundingClientRect(),
dd = doc.documentElement, b = doc.body, w = window,
xs = w.pageXOffset || dd.scrollLeft,
ys = w.pageYOffset || dd.scrollTop,
xo = dd.clientLeft || b.clientLeft,
yo = dd.clientTop || b.clientTop;
return { x: r.left + xs - xo, y: r.top + ys - yo };
}
function Project(tc,p1,sx,sy) {
var m = tc.radius * tc.z1 / (tc.z1 + tc.z2 + p1.z);
return {
x: p1.x * m * sx,
y: p1.y * m * sy,
z: p1.z,
w: (tc.z1 - p1.z) / tc.z2
};
}
/**
* @constructor
* for recursively splitting tag contents on <br> tags
*/
function TextSplitter(e) {
this.e = e;
this.br = 0;
this.line = [];
this.text = [];
this.original = e.innerText || e.textContent;
}
TSproto = TextSplitter.prototype;
TSproto.Lines = function(e) {
var r = e ? 1 : 0, cn, cl, i;
e = e || this.e;
cn = e.childNodes;
cl = cn.length;
for(i = 0; i < cl; ++i) {
if(cn[i].nodeName == 'BR') {
this.text.push(this.line.join(' '));
this.br = 1;
} else if(cn[i].nodeType == 3) {
if(this.br) {
this.line = [cn[i].nodeValue];
this.br = 0;
} else {
this.line.push(cn[i].nodeValue);
}
} else {
this.Lines(cn[i]);
}
}
r || this.br || this.text.push(this.line.join(' '));
return this.text;
}
TSproto.SplitWidth = function(w, c, f, h) {
var i, j, words, text = [];
c.font = h + 'px ' + f;
for(i = 0; i < this.text.length; ++i) {
words = this.text[i].split(/\s+/);
this.line = [words[0]];
for(j = 1; j < words.length; ++j) {
if(c.measureText(this.line.join(' ') + ' ' + words[j]).width > w) {
text.push(this.line.join(' '));
this.line = [words[j]];
} else {
this.line.push(words[j]);
}
}
text.push(this.line.join(' '));
}
return this.text = text;
}
/**
* @constructor
*/
function Outline(tc) {
this.ts = TimeNow();
this.tc = tc;
this.x = this.y = this.w = this.h = this.sc = 1;
this.z = 0;
this.Draw = tc.pulsateTo < 1 && tc.outlineMethod != 'colour' ? this.DrawPulsate : this.DrawSimple;
this.SetMethod(tc.outlineMethod);
}
Oproto = Outline.prototype;
Oproto.SetMethod = function(om) {
var methods = {
block: ['PreDraw','DrawBlock'],
colour: ['PreDraw','DrawColour'],
outline: ['PostDraw','DrawOutline'],
classic: ['LastDraw','DrawOutline'],
none: ['LastDraw']
}, funcs = methods[om] || methods.outline;
if(om == 'none') {
this.Draw = function() { return 1; }
} else {
this.drawFunc = this[funcs[1]];
}
this[funcs[0]] = this.Draw;
};
Oproto.Update = function(x,y,w,h,sc,z,xo,yo) {
var o = this.tc.outlineOffset, o2 = 2 * o;
this.x = sc * x + xo - o;
this.y = sc * y + yo - o;
this.w = sc * w + o2;
this.h = sc * h + o2;
this.sc = sc; // used to determine frontmost
this.z = z;
};
Oproto.DrawOutline = function(c,x,y,w,h,colour) {
c.strokeStyle = colour;
c.strokeRect(x,y,w,h);
};
Oproto.DrawColour = function(c,x,y,w,h,colour,tag,x1,y1) {
return this[tag.image ? 'DrawColourImage' : 'DrawColourText'](c,x,y,w,h,colour,tag,x1,y1);
};
Oproto.DrawColourText = function(c,x,y,w,h,colour,tag,x1,y1) {
var normal = tag.colour;
tag.colour = colour;
tag.alpha = 1;
tag.Draw(c,x1,y1);
tag.colour = normal;
return 1;
};
Oproto.DrawColourImage = function(c,x,y,w,h,colour,tag,x1,y1) {
var ccanvas = c.canvas, fx = ~~max(x,0), fy = ~~max(y,0),
fw = min(ccanvas.width - fx, w) + .5|0, fh = min(ccanvas.height - fy,h) + .5|0, cc;
if(ocanvas)
ocanvas.width = fw, ocanvas.height = fh;
else
ocanvas = NewCanvas(fw, fh);
if(!ocanvas)
return this.SetMethod('outline'); // if using IE and images, give up!
cc = ocanvas.getContext('2d');
cc.drawImage(ccanvas,fx,fy,fw,fh,0,0,fw,fh);
c.clearRect(fx,fy,fw,fh);
tag.alpha = 1;
tag.Draw(c,x1,y1);
c.setTransform(1,0,0,1,0,0);
c.save();
c.beginPath();
c.rect(fx,fy,fw,fh);
c.clip();
c.globalCompositeOperation = 'source-in';
c.fillStyle = colour;
c.fillRect(fx,fy,fw,fh);
c.restore();
c.globalCompositeOperation = 'destination-over';
c.drawImage(ocanvas,0,0,fw,fh,fx,fy,fw,fh);
c.globalCompositeOperation = 'source-over';
return 1;
};
Oproto.DrawBlock = function(c,x,y,w,h,colour) {
c.fillStyle = colour;
c.fillRect(x,y,w,h);
};
Oproto.DrawSimple = function(c, tag, x1, y1) {
var t = this.tc;
c.setTransform(1,0,0,1,0,0);
c.strokeStyle = t.outlineColour;
c.lineWidth = t.outlineThickness;
c.shadowBlur = c.shadowOffsetX = c.shadowOffsetY = 0;
c.globalAlpha = 1;
return this.drawFunc(c,this.x,this.y,this.w,this.h,t.outlineColour,tag,x1,y1);
};
Oproto.DrawPulsate = function(c, tag, x1, y1) {
var diff = TimeNow() - this.ts, t = this.tc;
c.setTransform(1,0,0,1,0,0);
c.strokeStyle = t.outlineColour;
c.lineWidth = t.outlineThickness;
c.shadowBlur = c.shadowOffsetX = c.shadowOffsetY = 0;
c.globalAlpha = t.pulsateTo + ((1 - t.pulsateTo) *
(0.5 + (cos(2 * Math.PI * diff / (1000 * t.pulsateTime)) / 2)));
return this.drawFunc(c,this.x,this.y,this.w,this.h,t.outlineColour,tag,x1,y1);
};
Oproto.Active = function(c,x,y) {
return (x >= this.x && y >= this.y &&
x <= this.x + this.w && y <= this.y + this.h);
};
Oproto.PreDraw = Oproto.PostDraw = Oproto.LastDraw = Nop;
/**
* @constructor
*/
function Tag(tc,text,a,v,w,h,col,font,original) {
var c = tc.ctxt;
this.tc = tc;
this.image = text.src ? text : null;
this.text = text.src ? [] : text;
this.text_original = original;
this.line_widths = [];
this.title = a.title || null;
this.a = a;
this.position = new Vector(v[0], v[1], v[2]);
this.x = this.y = this.z = 0;
this.w = w;
this.h = h;
this.colour = col || tc.textColour;
this.textFont = font || tc.textFont;
this.weight = this.sc = this.alpha = 1;
this.weighted = !tc.weight;
this.outline = new Outline(tc);
if(!this.image) {
this.textHeight = tc.textHeight;
this.extents = FindTextBoundingBox(this.text, this.textFont, this.textHeight);
this.Measure(c,tc);
}
this.SetShadowColour = tc.shadowAlpha ? this.SetShadowColourAlpha : this.SetShadowColourFixed;
this.SetDraw(tc);
}
Tproto = Tag.prototype;
Tproto.EqualTo = function(e) {
var i = e.getElementsByTagName('img');
if(this.a.href != e.href)
return 0;
if(i.length)
return this.image.src == i[0].src;
return (e.innerText || e.textContent) == this.text_original;
};
Tproto.SetDraw = function(t) {
this.Draw = this.image ? (t.ie > 7 ? this.DrawImageIE : this.DrawImage) : this.DrawText;
t.noSelect && (this.CheckActive = Nop);
};
Tproto.MeasureText = function(c) {
var i, l = this.text.length, w = 0, wl;
for(i = 0; i < l; ++i) {
this.line_widths[i] = wl = c.measureText(this.text[i]).width;
w = max(w, wl);
}
return w;
};
Tproto.Measure = function(c,t) {
this.h = this.extents ? this.extents.max.y + this.extents.min.y : this.textHeight;
c.font = this.font = this.textHeight + 'px ' + this.textFont;
this.w = this.MeasureText(c);
if(t.txtOpt) {
var s = t.txtScale, th = s * this.textHeight, f = th + 'px ' + this.textFont,
soff = [s*t.shadowOffset[0],s*t.shadowOffset[1]], cw;
c.font = f;
cw = this.MeasureText(c);
this.image = TextToCanvas(this.text, f, th, cw, s * this.h, this.colour,
t.shadow, s * t.shadowBlur, soff, s, s, cw, this.line_widths);
if(this.image) {
this.w = this.image.width / s;
this.h = this.image.height / s;
}
this.SetDraw(t);
t.txtOpt = !!this.image;
}
};
Tproto.SetFont = function(f, c) {
this.textFont = f;
this.colour = c;
this.extents = FindTextBoundingBox(this.text, this.textFont, this.textHeight);
this.Measure(this.tc.ctxt, this.tc);
};
Tproto.SetWeight = function(w) {
if(!this.text.length)
return;
this.weight = w;
this.Weight(this.tc.ctxt, this.tc);
this.Measure(this.tc.ctxt, this.tc);
};
Tproto.Weight = function(c,t) {
var w = this.weight, m = t.weightMode;
this.weighted = true;
if(m == 'colour' || m == 'both')
this.colour = FindGradientColour(t, (w - t.min_weight) / (t.max_weight-t.min_weight));
if(m == 'size' || m == 'both') {
if(t.weightSizeMin > 0 && t.weightSizeMax > t.weightSizeMin) {
this.textHeight = t.weightSize *
(t.weightSizeMin + (t.weightSizeMax - t.weightSizeMin) *
(w - t.min_weight) / (t.max_weight - t.min_weight));
} else {
this.textHeight = w * t.weightSize;
}
}
this.extents = FindTextBoundingBox(this.text, this.textFont, this.textHeight);
};
Tproto.SetShadowColourFixed = function(c,s,a) {
c.shadowColor = s;
};
Tproto.SetShadowColourAlpha = function(c,s,a) {
c.shadowColor = SetAlpha(s, a);
};
Tproto.DrawText = function(c,xoff,yoff) {
var t = this.tc, x = this.x, y = this.y, s = this.sc, i, xl;
c.globalAlpha = this.alpha;
c.fillStyle = this.colour;
t.shadow && this.SetShadowColour(c,t.shadow,this.alpha);
c.font = this.font;
x += xoff / s;
y += (yoff / s) - (this.h / 2);
for(i = 0; i < this.text.length; ++i) {
xl = x - (this.line_widths[i] / 2);
c.setTransform(s, 0, 0, s, s * xl, s * y);
c.fillText(this.text[i], 0, 0);
y += this.textHeight;
}
};
Tproto.DrawImage = function(c,xoff,yoff) {
var x = this.x, y = this.y, s = this.sc,
i = this.image, w = this.w, h = this.h, a = this.alpha,
shadow = this.shadow;
c.globalAlpha = a;
shadow && this.SetShadowColour(c,shadow,a);
x += (xoff / s) - (w / 2);
y += (yoff / s) - (h / 2);
c.setTransform(s, 0, 0, s, s * x, s * y);
c.drawImage(i, 0, 0, w, h);
};
Tproto.DrawImageIE = function(c,xoff,yoff) {
var i = this.image, s = this.sc,
w = i.width = this.w*s, h = i.height = this.h * s,
x = (this.x*s) + xoff - (w/2), y = (this.y*s) + yoff - (h/2);
c.setTransform(1,0,0,1,0,0);
c.globalAlpha = this.alpha;
c.drawImage(i, x, y);
};
Tproto.Calc = function(m,a) {
var pp, t = this.tc, mnb = t.minBrightness,
mxb = t.maxBrightness, r = t.max_radius;
pp = m.xform(this.position);
this.xformed = pp;
pp = Project(t, pp, t.stretchX, t.stretchY);
this.x = pp.x;
this.y = pp.y;
this.z = pp.z;
this.sc = pp.w;
this.alpha = a * Clamp(mnb + (mxb - mnb) * (r - this.z) / (2 * r), 0, 1);
};
Tproto.CheckActive = function(c,xoff,yoff) {
var t = this.tc, o = this.outline,
w = this.w, h = this.h,
x = this.x - w/2, y = this.y - h/2;
o.Update(x, y, w, h, this.sc, this.z, xoff, yoff);
return o.Active(c, t.mx, t.my) ? o : null;
};
Tproto.Clicked = function(e) {
var a = this.a, t = a.target, h = a.href, evt;
if(t != '' && t != '_self') {
if(self.frames[t]) {
self.frames[t].document.location = h;
} else{
try {
if(top.frames[t]) {
top.frames[t].document.location = h;
return;
}
} catch(err) {
// different domain/port/protocol?
}
window.open(h, t);
}
return;
}
if(doc.createEvent) {
evt = doc.createEvent('MouseEvents');
evt.initMouseEvent('click', 1, 1, window, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, null);
if(!a.dispatchEvent(evt))
return;
} else if(a.fireEvent) {
if(!a.fireEvent('onclick'))
return;
}
doc.location = h;
};
/**
* @constructor
*/
function TagCanvas(cid,lctr,opt) {
var i, p, c = doc.getElementById(cid), cp = ['id','class','innerHTML'];
if(!c) throw 0;
if(Defined(window.G_vmlCanvasManager)) {
c = window.G_vmlCanvasManager.initElement(c);
this.ie = parseFloat(navigator.appVersion.split('MSIE')[1]);
}
if(c && (!c.getContext || !c.getContext('2d').fillText)) {
p = doc.createElement('DIV');
for(i = 0; i < cp.length; ++i)
p[cp[i]] = c[cp[i]];
c.parentNode.insertBefore(p,c);
c.parentNode.removeChild(c);
throw 0;
}
for(i in TagCanvas.options)
this[i] = opt && Defined(opt[i]) ? opt[i] :
(Defined(TagCanvas[i]) ? TagCanvas[i] : TagCanvas.options[i]);
this.canvas = c;
this.ctxt = c.getContext('2d');
this.z1 = 250 / this.depth;
this.z2 = this.z1 / this.zoom;
this.radius = min(c.height, c.width) * 0.0075; // fits radius of 100 in canvas
this.max_weight = 0;
this.min_weight = 200;
this.textFont = this.textFont && FixFont(this.textFont);
this.textHeight *= 1;
this.pulsateTo = Clamp(this.pulsateTo, 0, 1);
this.minBrightness = Clamp(this.minBrightness, 0, 1);
this.maxBrightness = Clamp(this.maxBrightness, this.minBrightness, 1);
this.ctxt.textBaseline = 'top';
this.lx = (this.lock + '').indexOf('x') + 1;
this.ly = (this.lock + '').indexOf('y') + 1;
this.frozen = this.dx = this.dy = this.fixedAnim = this.touched = 0;
this.fixedAlpha = 1;
this.source = lctr || cid;
this.transform = Matrix.Identity();
this.startTime = this.time = TimeNow();
this.Animate = this.dragControl ? this.AnimateDrag : this.AnimatePosition;
this.animTiming = (typeof TagCanvas[this.animTiming] == 'function' ?
TagCanvas[this.animTiming] : TagCanvas.Smooth);
if(this.shadowBlur || this.shadowOffset[0] || this.shadowOffset[1]) {
// let the browser translate "red" into "#ff0000"
this.ctxt.shadowColor = this.shadow;
this.shadow = this.ctxt.shadowColor;
this.shadowAlpha = ShadowAlphaBroken();
} else {
delete this.shadow;
}
this.Load();
if(lctr && this.hideTags) {
(function(t) {
if(TagCanvas.loaded)
t.HideTags();
else
AddHandler('load', function() { t.HideTags(); }, window);
})(this);
}
this.yaw = this.initial ? this.initial[0] * this.maxSpeed : 0;
this.pitch = this.initial ? this.initial[1] * this.maxSpeed : 0;
if(this.tooltip) {
if(this.tooltip == 'native') {
this.Tooltip = this.TooltipNative;
} else {
this.Tooltip = this.TooltipDiv;
if(!this.ttdiv) {
this.ttdiv = doc.createElement('div');
this.ttdiv.className = this.tooltipClass;
this.ttdiv.style.position = 'absolute';
this.ttdiv.style.zIndex = c.style.zIndex + 1;
AddHandler('mouseover',function(e){e.target.style.display='none';},this.ttdiv);
doc.body.appendChild(this.ttdiv);
}
}
} else {
this.Tooltip = this.TooltipNone;
}
if(!this.noMouse && !handlers[cid]) {
AddHandler('mousemove', MouseMove, c);
AddHandler('mouseout', MouseOut, c);
AddHandler('mouseup', MouseUp, c);
AddHandler('touchstart', TouchDown, c);
AddHandler('touchend', TouchUp, c);
AddHandler('touchcancel', TouchUp, c);
AddHandler('touchmove', TouchMove, c);
if(this.dragControl) {
AddHandler('mousedown', MouseDown, c);
AddHandler('selectstart', Nop, c);
}
if(this.wheelZoom) {
AddHandler('mousewheel', MouseWheel, c);
AddHandler('DOMMouseScroll', MouseWheel, c);
}
handlers[cid] = 1;
}
TagCanvas.started || (TagCanvas.started = setTimeout(DrawCanvas, this.interval));
}
TCproto = TagCanvas.prototype;
TCproto.SourceElements = function() {
if(doc.querySelectorAll)
return doc.querySelectorAll('#' + this.source);
return [doc.getElementById(this.source)];
};
TCproto.HideTags = function() {
var el = this.SourceElements(), i;
for(i = 0; i < el.length; ++i)
el[i].style.display = 'none';
};
TCproto.GetTags = function() {
var el = this.SourceElements(), etl, tl = [], i, j;
for(i = 0; i < el.length; ++i) {
etl = el[i].getElementsByTagName('a');
for(j = 0; j < etl.length; ++j) {
tl.push(etl[j]);
}
}
return tl;
};
TCproto.CreateTag = function(e, p) {
var im = e.getElementsByTagName('img'), i, t, ts, font;
p = p || [0, 0, 0];
if(im.length) {
i = new Image;