Revert 153612 - Add Chrome Endure graph plotting code. (broke Chrome OS)

chrome/test/functional/perf/endure_graphs/js/coordinates.js

-/*
-  Copyright (c) 2012 The Chromium Authors. All rights reserved.
-  Use of this source code is governed by a BSD-style license that can be
-  found in the LICENSE file.
-*/
-
-/**
- * @fileoverview Class and functions to handle positioning of plot data points.
- */
-
-/**
- * Class that handles plot data positioning.
- * @constructor
- *
- * @param {Array} plotData Data that will be plotted.  It is an array of lines,
- *     where each line is an array of points, and each point is a length-2 array
- *     representing an (x, y) pair.
- */
-function Coordinates(plotData) {
-  this.plotData = plotData;
-
-  height = window.innerHeight - 16;
-  width = window.innerWidth - 16;
-
-  this.widthMax = width;
-  this.heightMax = Math.min(400, height - 85);
-
-  this.processValues_('x');
-  this.processValues_('y');
-}
-
-/**
- * Determines the min/max x or y values in the plot, accounting for some extra
- * buffer space.
- *
- * @param {string} type The type of value to process, either 'x' or 'y'.
- */
-Coordinates.prototype.processValues_ = function (type) {
-  var merged = [];
-  for (var i = 0; i < this.plotData.length; i++)
-    for (var j = 0; j < this.plotData[i].length; j++) {
-      if (type == 'x')
-        merged.push(parseFloat(this.plotData[i][j][0]));  // Index 0 is x value.
-      else
-        merged.push(parseFloat(this.plotData[i][j][1]));  // Index 1 is y value.
-    }
-
-  min = merged[0];
-  max = merged[0];
-  for (var i = 1; i < merged.length; ++i) {
-    if (isNaN(min) || merged[i] < min)
-      min = merged[i];
-    if (isNaN(max) || merged[i] > max)
-      max = merged[i];
-  }
-
-  var bufferSpace = 0.02 * (max - min);
-
-  if (type == 'x') {
-    this.xMinValue = min - bufferSpace;
-    this.xMaxValue = max + bufferSpace;
-  } else {
-    this.yMinValue = min - bufferSpace;
-    this.yMaxValue = max + bufferSpace;
-  }
-};
-
-/**
- * Difference between horizontal max and min values.
- *
- * @return {number} The x value range.
- */
-Coordinates.prototype.xValueRange = function() {
-  return this.xMaxValue - this.xMinValue;
-};
-
-/**
- * Difference between vertical max and min values.
- *
- * @return {number} The y value range.
- */
-Coordinates.prototype.yValueRange = function() {
-  return this.yMaxValue - this.yMinValue
-};
-
-/**
- * Converts horizontal data value to pixel value on canvas.
- *
- * @param {number} value The x data value.
- * @return {number} The corresponding x pixel value on the canvas.
- */
-Coordinates.prototype.xPixel = function(value) {
-  return this.widthMax * ((value - this.xMinValue) / this.xValueRange());
-};
-
-/**
- * Converts vertical data value to pixel value on canvas.
- *
- * @param {number} value The y data value.
- * @return {number} The corresponding y pixel value on the canvas.
- */
-Coordinates.prototype.yPixel = function(value) {
-  if (this.yValueRange() == 0) {
-    // Completely horizontal lines should be centered horizontally.
-    return this.heightMax / 2;
-  } else {
-    return this.heightMax -
-        (this.heightMax * (value - this.yMinValue) / this.yValueRange());
-  }
-};
-
-/**
- * Converts x point on canvas to data value it represents.
- *
- * @param {number} position The x pixel value on the canvas.
- * @return {number} The corresponding x data value.
- */
-Coordinates.prototype.xValue = function(position) {
-  return this.xMinValue + (position / this.widthMax * this.xValueRange());
-};
-
-/**
- * Converts y point on canvas to data value it represents.
- *
- * @param {number} position The y pixel value on the canvas.
- * @return {number} The corresponding y data value.
- */
-Coordinates.prototype.yValue = function(position) {
-  var ratio = this.heightMax / (this.heightMax - position);
-  return this.yMinValue + (this.yValueRange() / ratio);
-};