"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// Word cloud layout by Jason Davies, https://www.jasondavies.com/wordcloud/
// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf
var d3 = require("d3");
var dispatch = d3.dispatch;
var cloudRadians = Math.PI / 180, cw = 1 << 11 >> 5, ch = 1 << 11;
function default_1() {
    var size = [256, 256], text = cloudText, font = cloudFont, fontSize = cloudFontSize, fontStyle = cloudFontNormal, fontWeight = cloudFontNormal, rotate = cloudRotate, padding = cloudPadding, spiral = archimedeanSpiral, words = [], timeInterval = Infinity, event = dispatch("word", "end"), timer = null, random = Math.random, cloud = {}, canvas = cloudCanvas;
    cloud.canvas = function (_) {
        return arguments.length ? (canvas = functor(_), cloud) : canvas;
    };
    cloud.start = function () {
        var contextAndRatio = getContext(canvas()), board = zeroArray((size[0] >> 5) * size[1]), bounds = null, n = words.length, i = -1, tags = [], data = words.map(function (d, i) {
            d.text = text.call(this, d, i);
            d.font = font.call(this, d, i);
            d.style = fontStyle.call(this, d, i);
            d.weight = fontWeight.call(this, d, i);
            d.rotate = rotate.call(this, d, i);
            d.size = ~~fontSize.call(this, d, i);
            d.padding = padding.call(this, d, i);
            return d;
        }).sort(function (a, b) { return b.size - a.size; });
        if (timer)
            clearInterval(timer);
        timer = setInterval(step, 0);
        step();
        return cloud;
        function step() {
            var start = Date.now();
            while (Date.now() - start < timeInterval && ++i < n && timer) {
                var d = data[i];
                d.x = (size[0] * (random() + .5)) >> 1;
                d.y = (size[1] * (random() + .5)) >> 1;
                cloudSprite(contextAndRatio, d, data, i);
                if (d.hasText && place(board, d, bounds)) {
                    tags.push(d);
                    event.call("word", cloud, d);
                    if (bounds)
                        cloudBounds(bounds, d);
                    else
                        bounds = [{ x: d.x + d.x0, y: d.y + d.y0 }, { x: d.x + d.x1, y: d.y + d.y1 }];
                    // Temporary hack
                    d.x -= size[0] >> 1;
                    d.y -= size[1] >> 1;
                }
            }
            if (i >= n) {
                cloud.stop();
                event.call("end", cloud, tags, bounds);
            }
        }
    };
    cloud.stop = function () {
        if (timer) {
            clearInterval(timer);
            timer = null;
        }
        return cloud;
    };
    function getContext(canvas) {
        canvas.width = canvas.height = 1;
        var ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
        canvas.width = (cw << 5) / ratio;
        canvas.height = ch / ratio;
        var context = canvas.getContext("2d");
        context.fillStyle = context.strokeStyle = "red";
        context.textAlign = "center";
        return { context: context, ratio: ratio };
    }
    function place(board, tag, bounds) {
        var perimeter = [{ x: 0, y: 0 }, { x: size[0], y: size[1] }], startX = tag.x, startY = tag.y, maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]), s = spiral(size), dt = random() < .5 ? 1 : -1, t = -dt, dxdy, dx, dy;
        while (dxdy = s(t += dt)) {
            dx = ~~dxdy[0];
            dy = ~~dxdy[1];
            if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta)
                break;
            tag.x = startX + dx;
            tag.y = startY + dy;
            if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
                tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1])
                continue;
            // TODO only check for collisions within current bounds.
            if (!bounds || !cloudCollide(tag, board, size[0])) {
                if (!bounds || collideRects(tag, bounds)) {
                    var sprite = tag.sprite, w = tag.width >> 5, sw = size[0] >> 5, lx = tag.x - (w << 4), sx = lx & 0x7f, msx = 32 - sx, h = tag.y1 - tag.y0, x = (tag.y + tag.y0) * sw + (lx >> 5), last;
                    for (var j = 0; j < h; j++) {
                        last = 0;
                        for (var i = 0; i <= w; i++) {
                            board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
                        }
                        x += sw;
                    }
                    delete tag.sprite;
                    return true;
                }
            }
        }
        return false;
    }
    cloud.timeInterval = function (_) {
        return arguments.length ? (timeInterval = _ == null ? Infinity : _, cloud) : timeInterval;
    };
    cloud.words = function (_) {
        return arguments.length ? (words = _, cloud) : words;
    };
    cloud.size = function (_) {
        return arguments.length ? (size = [+_[0], +_[1]], cloud) : size;
    };
    cloud.font = function (_) {
        return arguments.length ? (font = functor(_), cloud) : font;
    };
    cloud.fontStyle = function (_) {
        return arguments.length ? (fontStyle = functor(_), cloud) : fontStyle;
    };
    cloud.fontWeight = function (_) {
        return arguments.length ? (fontWeight = functor(_), cloud) : fontWeight;
    };
    cloud.rotate = function (_) {
        return arguments.length ? (rotate = functor(_), cloud) : rotate;
    };
    cloud.text = function (_) {
        return arguments.length ? (text = functor(_), cloud) : text;
    };
    cloud.spiral = function (_) {
        return arguments.length ? (spiral = spirals[_] || _, cloud) : spiral;
    };
    cloud.fontSize = function (_) {
        return arguments.length ? (fontSize = functor(_), cloud) : fontSize;
    };
    cloud.padding = function (_) {
        return arguments.length ? (padding = functor(_), cloud) : padding;
    };
    cloud.random = function (_) {
        return arguments.length ? (random = _, cloud) : random;
    };
    cloud.on = function () {
        var value = event.on.apply(event, arguments);
        return value === event ? cloud : value;
    };
    return cloud;
}
exports.default = default_1;
;
function cloudText(d) {
    return d.text;
}
function cloudFont() {
    return "Microsoft YaHei";
}
function cloudFontNormal() {
    return "normal";
}
function cloudFontSize(d) {
    return Math.sqrt(d.value);
}
function cloudRotate() {
    return (~~(Math.random() * 6) - 3) * 30;
}
function cloudPadding() {
    return 1;
}
// Fetches a monochrome sprite bitmap for the specified text.
// Load in batches for speed.
function cloudSprite(contextAndRatio, d, data, di) {
    if (d.sprite)
        return;
    var c = contextAndRatio.context, ratio = contextAndRatio.ratio;
    c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
    var x = 0, y = 0, maxh = 0, n = data.length;
    --di;
    while (++di < n) {
        d = data[di];
        c.save();
        c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
        var w = c.measureText(d.text + "m").width * ratio, h = d.size << 1;
        if (d.rotate) {
            var sr = Math.sin(d.rotate * cloudRadians), cr = Math.cos(d.rotate * cloudRadians), wcr = w * cr, wsr = w * sr, hcr = h * cr, hsr = h * sr;
            w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
            h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
        }
        else {
            w = (w + 0x1f) >> 5 << 5;
        }
        if (h > maxh)
            maxh = h;
        if (x + w >= (cw << 5)) {
            x = 0;
            y += maxh;
            maxh = 0;
        }
        if (y + h >= ch)
            break;
        c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
        if (d.rotate)
            c.rotate(d.rotate * cloudRadians);
        c.fillText(d.text, 0, 0);
        if (d.padding)
            c.lineWidth = 2 * d.padding, c.strokeText(d.text, 0, 0);
        c.restore();
        d.width = w;
        d.height = h;
        d.xoff = x;
        d.yoff = y;
        d.x1 = w >> 1;
        d.y1 = h >> 1;
        d.x0 = -d.x1;
        d.y0 = -d.y1;
        d.hasText = true;
        x += w;
    }
    var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data, sprite = [];
    while (--di >= 0) {
        d = data[di];
        if (!d.hasText)
            continue;
        // @ts-ignore
        var w = d.width, w32 = w >> 5, h = d.y1 - d.y0;
        // Zero the buffer
        for (var i = 0; i < h * w32; i++)
            sprite[i] = 0;
        x = d.xoff;
        if (x == null)
            return;
        y = d.yoff;
        var seen = 0, seenRow = -1;
        for (var j = 0; j < h; j++) {
            for (var i = 0; i < w; i++) {
                var k = w32 * j + (i >> 5), m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
                sprite[k] |= m;
                seen |= m;
            }
            if (seen)
                seenRow = j;
            else {
                d.y0++;
                h--;
                j--;
                y++;
            }
        }
        d.y1 = d.y0 + seenRow;
        d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
    }
}
// Use mask-based collision detection.
function cloudCollide(tag, board, sw) {
    sw >>= 5;
    var sprite = tag.sprite, w = tag.width >> 5, lx = tag.x - (w << 4), sx = lx & 0x7f, msx = 32 - sx, h = tag.y1 - tag.y0, x = (tag.y + tag.y0) * sw + (lx >> 5), last;
    for (var j = 0; j < h; j++) {
        last = 0;
        for (var i = 0; i <= w; i++) {
            if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
                & board[x + i])
                return true;
        }
        x += sw;
    }
    return false;
}
function cloudBounds(bounds, d) {
    var b0 = bounds[0], b1 = bounds[1];
    if (d.x + d.x0 < b0.x)
        b0.x = d.x + d.x0;
    if (d.y + d.y0 < b0.y)
        b0.y = d.y + d.y0;
    if (d.x + d.x1 > b1.x)
        b1.x = d.x + d.x1;
    if (d.y + d.y1 > b1.y)
        b1.y = d.y + d.y1;
}
function collideRects(a, b) {
    return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
}
function archimedeanSpiral(size) {
    var e = size[0] / size[1];
    return function (t) {
        return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
    };
}
function rectangularSpiral(size) {
    var dy = 4, dx = dy * size[0] / size[1], x = 0, y = 0;
    return function (t) {
        var sign = t < 0 ? -1 : 1;
        // See triangular numbers: T_n = n * (n + 1) / 2.
        switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
            case 0:
                x += dx;
                break;
            case 1:
                y += dy;
                break;
            case 2:
                x -= dx;
                break;
            default:
                y -= dy;
                break;
        }
        return [x, y];
    };
}
// TODO reuse arrays?
function zeroArray(n) {
    var a = [], i = -1;
    while (++i < n)
        a[i] = 0;
    return a;
}
function cloudCanvas() {
    return document.createElement("canvas");
}
function functor(d) {
    return typeof d === "function" ? d : function () { return d; };
}
var spirals = {
    archimedean: archimedeanSpiral,
    rectangular: rectangularSpiral
};
