64 lines
1.2 KiB
JavaScript
64 lines
1.2 KiB
JavaScript
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var Greedy = require('./greedy');
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var MAX_TIMES = 20;
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function spiralFill(label, greedy) {
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var dt = -1;
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var x = label.attr('x'),
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y = label.attr('y');
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var bbox = label.getBBox();
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var maxDelta = Math.sqrt(bbox.width * bbox.width + bbox.height * bbox.height);
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var dxdy,
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t = -dt,
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dx = 0,
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dy = 0;
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var f = function f(t) {
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return [(t *= 0.1) * Math.cos(t), t * Math.sin(t)];
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};
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if (greedy.hasGap(bbox)) {
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greedy.fillGap(bbox);
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return true;
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}
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var canFill = false,
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times = 0;
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while (Math.min(Math.abs(dx), Math.abs(dy)) < maxDelta && times < MAX_TIMES) {
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dxdy = f(t += dt);
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dx = ~~dxdy[0];
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dy = ~~dxdy[1];
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label.attr({
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x: x + dx,
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y: y + dy
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});
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times++;
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if (greedy.hasGap(label.getBBox())) {
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greedy.fillGap(bbox);
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canFill = true;
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break;
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}
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}
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return canFill;
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}
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module.exports = function (labels) {
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var label;
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var greedy = new Greedy();
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var toBeRemoved = [];
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for (var i = 0; i < labels.length; i++) {
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label = labels[i];
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if (!spiralFill(label, greedy)) {
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toBeRemoved.push(label);
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}
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}
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for (var _i = 0; _i < toBeRemoved.length; _i++) {
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toBeRemoved[_i].remove();
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}
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};
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