From 841395dd16f470e3c051a0a4fff5b91efc983c30 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 19 May 2021 14:33:27 +0200 Subject: Adding upstream version 1.31.0. Signed-off-by: Daniel Baumann --- web/gui/lib/dygraph-smooth-plotter-c91c859.js | 141 -------------------------- 1 file changed, 141 deletions(-) delete mode 100644 web/gui/lib/dygraph-smooth-plotter-c91c859.js (limited to 'web/gui/lib/dygraph-smooth-plotter-c91c859.js') diff --git a/web/gui/lib/dygraph-smooth-plotter-c91c859.js b/web/gui/lib/dygraph-smooth-plotter-c91c859.js deleted file mode 100644 index c0b76fb0a..000000000 --- a/web/gui/lib/dygraph-smooth-plotter-c91c859.js +++ /dev/null @@ -1,141 +0,0 @@ -// SPDX-License-Identifier: MIT -(function() { -"use strict"; - -var Dygraph; -if (window.Dygraph) { - Dygraph = window.Dygraph; -} else if (typeof(module) !== 'undefined') { - Dygraph = require('../dygraph'); -} - -/** - * Given three sequential points, p0, p1 and p2, find the left and right - * control points for p1. - * - * The three points are expected to have x and y properties. - * - * The alpha parameter controls the amount of smoothing. - * If α=0, then both control points will be the same as p1 (i.e. no smoothing). - * - * Returns [l1x, l1y, r1x, r1y] - * - * It's guaranteed that the line from (l1x, l1y)-(r1x, r1y) passes through p1. - * Unless allowFalseExtrema is set, then it's also guaranteed that: - * l1y ∈ [p0.y, p1.y] - * r1y ∈ [p1.y, p2.y] - * - * The basic algorithm is: - * 1. Put the control points l1 and r1 α of the way down (p0, p1) and (p1, p2). - * 2. Shift l1 and r2 so that the line l1–r1 passes through p1 - * 3. Adjust to prevent false extrema while keeping p1 on the l1–r1 line. - * - * This is loosely based on the HighCharts algorithm. - */ -function getControlPoints(p0, p1, p2, opt_alpha, opt_allowFalseExtrema) { - var alpha = (opt_alpha !== undefined) ? opt_alpha : 1/3; // 0=no smoothing, 1=crazy smoothing - var allowFalseExtrema = opt_allowFalseExtrema || false; - - if (!p2) { - return [p1.x, p1.y, null, null]; - } - - // Step 1: Position the control points along each line segment. - var l1x = (1 - alpha) * p1.x + alpha * p0.x, - l1y = (1 - alpha) * p1.y + alpha * p0.y, - r1x = (1 - alpha) * p1.x + alpha * p2.x, - r1y = (1 - alpha) * p1.y + alpha * p2.y; - - // Step 2: shift the points up so that p1 is on the l1–r1 line. - if (l1x != r1x) { - // This can be derived w/ some basic algebra. - var deltaY = p1.y - r1y - (p1.x - r1x) * (l1y - r1y) / (l1x - r1x); - l1y += deltaY; - r1y += deltaY; - } - - // Step 3: correct to avoid false extrema. - if (!allowFalseExtrema) { - if (l1y > p0.y && l1y > p1.y) { - l1y = Math.max(p0.y, p1.y); - r1y = 2 * p1.y - l1y; - } else if (l1y < p0.y && l1y < p1.y) { - l1y = Math.min(p0.y, p1.y); - r1y = 2 * p1.y - l1y; - } - - if (r1y > p1.y && r1y > p2.y) { - r1y = Math.max(p1.y, p2.y); - l1y = 2 * p1.y - r1y; - } else if (r1y < p1.y && r1y < p2.y) { - r1y = Math.min(p1.y, p2.y); - l1y = 2 * p1.y - r1y; - } - } - - return [l1x, l1y, r1x, r1y]; -} - -// i.e. is none of (null, undefined, NaN) -function isOK(x) { - return !!x && !isNaN(x); -}; - -// A plotter which uses splines to create a smooth curve. -// See tests/plotters.html for a demo. -// Can be controlled via smoothPlotter.smoothing -function smoothPlotter(e) { - var ctx = e.drawingContext, - points = e.points; - - ctx.beginPath(); - ctx.moveTo(points[0].canvasx, points[0].canvasy); - - // right control point for previous point - var lastRightX = points[0].canvasx, lastRightY = points[0].canvasy; - - for (var i = 1; i < points.length; i++) { - var p0 = points[i - 1], - p1 = points[i], - p2 = points[i + 1]; - p0 = p0 && isOK(p0.canvasy) ? p0 : null; - p1 = p1 && isOK(p1.canvasy) ? p1 : null; - p2 = p2 && isOK(p2.canvasy) ? p2 : null; - if (p0 && p1) { - var controls = getControlPoints({x: p0.canvasx, y: p0.canvasy}, - {x: p1.canvasx, y: p1.canvasy}, - p2 && {x: p2.canvasx, y: p2.canvasy}, - smoothPlotter.smoothing); - // Uncomment to show the control points: - // ctx.lineTo(lastRightX, lastRightY); - // ctx.lineTo(controls[0], controls[1]); - // ctx.lineTo(p1.canvasx, p1.canvasy); - lastRightX = (lastRightX !== null) ? lastRightX : p0.canvasx; - lastRightY = (lastRightY !== null) ? lastRightY : p0.canvasy; - ctx.bezierCurveTo(lastRightX, lastRightY, - controls[0], controls[1], - p1.canvasx, p1.canvasy); - lastRightX = controls[2]; - lastRightY = controls[3]; - } else if (p1) { - // We're starting again after a missing point. - ctx.moveTo(p1.canvasx, p1.canvasy); - lastRightX = p1.canvasx; - lastRightY = p1.canvasy; - } else { - lastRightX = lastRightY = null; - } - } - - ctx.stroke(); -} -smoothPlotter.smoothing = 1/3; -smoothPlotter._getControlPoints = getControlPoints; // for testing - -// older versions exported a global. -// This will be removed in the future. -// The preferred way to access smoothPlotter is via Dygraph.smoothPlotter. -window.smoothPlotter = smoothPlotter; -Dygraph.smoothPlotter = smoothPlotter; - -})(); -- cgit v1.2.3