popup.js

(function () {
var tokenRegex = /\{([^\}]+)\}/g,
    objNotationRegex = /(?:(?:^|\.)(.+?)(?=\[|\.|$|\()|\[('|")(.+?)\2\])(\(\))?/g, // matches .xxxxx or ["xxxxx"] to run over object properties
    replacer = function (all, key, obj) {
        var res = obj;
        key.replace(objNotationRegex, function (all, name, quote, quotedName, isFunc) {
            name = name || quotedName;
            if (res) {
                if (name in res) {
                    res = res[name];
                }
                typeof res == "function" && isFunc && (res = res());
            }
        });
        res = (res == null || res == obj ? all : res) + "";
        return res;
    },
    fill = function (str, obj) {
        return String(str).replace(tokenRegex, function (all, key) {
            return replacer(all, key, obj);
        });
    };
    Raphael.fn.popup = function (X, Y, set, pos, ret) {
        pos = String(pos || "top-middle").split("-");
        pos[1] = pos[1] || "middle";
        var r = 5,
            bb = set.getBBox(),
            w = Math.round(bb.width),
            h = Math.round(bb.height),
            x = Math.round(bb.x) - r,
            y = Math.round(bb.y) - r,
            gap = Math.min(h / 2, w / 2, 10),
            shapes = {
                top: "M{x},{y}h{w4},{w4},{w4},{w4}a{r},{r},0,0,1,{r},{r}v{h4},{h4},{h4},{h4}a{r},{r},0,0,1,-{r},{r}l-{right},0-{gap},{gap}-{gap}-{gap}-{left},0a{r},{r},0,0,1-{r}-{r}v-{h4}-{h4}-{h4}-{h4}a{r},{r},0,0,1,{r}-{r}z",
                bottom: "M{x},{y}l{left},0,{gap}-{gap},{gap},{gap},{right},0a{r},{r},0,0,1,{r},{r}v{h4},{h4},{h4},{h4}a{r},{r},0,0,1,-{r},{r}h-{w4}-{w4}-{w4}-{w4}a{r},{r},0,0,1-{r}-{r}v-{h4}-{h4}-{h4}-{h4}a{r},{r},0,0,1,{r}-{r}z",
                right: "M{x},{y}h{w4},{w4},{w4},{w4}a{r},{r},0,0,1,{r},{r}v{h4},{h4},{h4},{h4}a{r},{r},0,0,1,-{r},{r}h-{w4}-{w4}-{w4}-{w4}a{r},{r},0,0,1-{r}-{r}l0-{bottom}-{gap}-{gap},{gap}-{gap},0-{top}a{r},{r},0,0,1,{r}-{r}z",
                left: "M{x},{y}h{w4},{w4},{w4},{w4}a{r},{r},0,0,1,{r},{r}l0,{top},{gap},{gap}-{gap},{gap},0,{bottom}a{r},{r},0,0,1,-{r},{r}h-{w4}-{w4}-{w4}-{w4}a{r},{r},0,0,1-{r}-{r}v-{h4}-{h4}-{h4}-{h4}a{r},{r},0,0,1,{r}-{r}z"
            },
            offset = {
                hx0: X - (x + r + w - gap * 2),
                hx1: X - (x + r + w / 2 - gap),
                hx2: X - (x + r + gap),
                vhy: Y - (y + r + h + r + gap),
                "^hy": Y - (y - gap)
                
            },
            mask = [{
                x: x + r,
                y: y,
                w: w,
                w4: w / 4,
                h4: h / 4,
                right: 0,
                left: w - gap * 2,
                bottom: 0,
                top: h - gap * 2,
                r: r,
                h: h,
                gap: gap
            }, {
                x: x + r,
                y: y,
                w: w,
                w4: w / 4,
                h4: h / 4,
                left: w / 2 - gap,
                right: w / 2 - gap,
                top: h / 2 - gap,
                bottom: h / 2 - gap,
                r: r,
                h: h,
                gap: gap
            }, {
                x: x + r,
                y: y,
                w: w,
                w4: w / 4,
                h4: h / 4,
                left: 0,
                right: w - gap * 2,
                top: 0,
                bottom: h - gap * 2,
                r: r,
                h: h,
                gap: gap
            }][pos[1] == "middle" ? 1 : (pos[1] == "top" || pos[1] == "left") * 2];
            var dx = 0,
                dy = 0,
                out = this.path(fill(shapes[pos[0]], mask)).insertBefore(set);
            switch (pos[0]) {
                case "top":
                    dx = X - (x + r + mask.left + gap);
                    dy = Y - (y + r + h + r + gap);
                break;
                case "bottom":
                    dx = X - (x + r + mask.left + gap);
                    dy = Y - (y - gap);
                break;
                case "left":
                    dx = X - (x + r + w + r + gap);
                    dy = Y - (y + r + mask.top + gap);
                break;
                case "right":
                    dx = X - (x - gap);
                    dy = Y - (y + r + mask.top + gap);
                break;
            }
            out.translate(dx, dy);
            if (ret) {
                ret = out.attr("path");
                out.remove();
                return {
                    path: ret,
                    dx: dx,
                    dy: dy
                };
            }
            set.translate(dx, dy);
            return out;
    };
})();