From 9154f07d785b038e8af866da745a67f5ba531771 Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <danvdk@gmail.com>
Date: Wed, 28 Dec 2016 16:59:53 -0500
Subject: [PATCH] Remove dead code (#818)

---
 docs/legal.html                |  18 -----
 src/polyfills/console.js       |  20 -----
 src/polyfills/dashed-canvas.js | 180 -----------------------------------------
 tests/dashed-canvas.html       |  58 -------------
 4 files changed, 276 deletions(-)
 delete mode 100644 src/polyfills/console.js
 delete mode 100644 src/polyfills/dashed-canvas.js
 delete mode 100644 tests/dashed-canvas.html

diff --git a/docs/legal.html b/docs/legal.html
index 26a7ab7..a68be98 100644
--- a/docs/legal.html
+++ b/docs/legal.html
@@ -6,22 +6,4 @@
 
 <p>dygraphs is available under the MIT license, included in LICENSE.txt.</p>
 
-<pre>dygraphs uses:
- - YUI compressor (BSD License)
- - JsDoc Toolkit (MIT license)
- - console-polyfill (MIT license)
-
-automated tests use:
- - auto_tests/lib/jquery-1.4.2.js (MIT &amp; GPL2)
- - auto_tests/lib/Asserts.js (Apache 2.0 License)
- - auto-tests/lib/JsTestDriver-1.3.3cjar (Apache 2.0 License
-
-yui compressor: http://developer.yahoo.com/yui/compressor/
-jsdoc toolkit: http://code.google.com/p/jsdoc-toolkit/
-
-jquery: http://code.jquery.com/jquery-1.4.2.js
-Asserts.js: http://www.google.com/codesearch/p?#3tsINRJRCro/trunk/JsTestDriver/src/com/google/jstestdriver/javascript/Asserts.js
-JSTestDriver: http://code.google.com/p/js-test-driver/
-</pre>
-
 <!--#include virtual="footer.html" -->
diff --git a/src/polyfills/console.js b/src/polyfills/console.js
deleted file mode 100644
index 589a839..0000000
--- a/src/polyfills/console.js
+++ /dev/null
@@ -1,20 +0,0 @@
-// Console-polyfill. MIT license.
-// https://github.com/paulmillr/console-polyfill
-// Make it safe to do console.log() always.
-(function(global) {
-  'use strict';
-  global.console = global.console || {};
-  var con = global.console;
-  var prop, method;
-  var empty = {};
-  var dummy = function() {};
-  var properties = 'memory'.split(',');
-  var methods = ('assert,clear,count,debug,dir,dirxml,error,exception,group,' +
-     'groupCollapsed,groupEnd,info,log,markTimeline,profile,profiles,profileEnd,' +
-     'show,table,time,timeEnd,timeline,timelineEnd,timeStamp,trace,warn').split(',');
-  while (prop = properties.pop()) if (!con[prop]) con[prop] = empty;
-  while (method = methods.pop()) if (!con[method]) con[method] = dummy;
-})(typeof window === 'undefined' ? this : window);
-// Using `this` for web workers while maintaining compatibility with browser
-// targeted script loaders such as Browserify or Webpack where the only way to
-// get to the global object is via `window`.
diff --git a/src/polyfills/dashed-canvas.js b/src/polyfills/dashed-canvas.js
deleted file mode 100644
index 0fc6874..0000000
--- a/src/polyfills/dashed-canvas.js
+++ /dev/null
@@ -1,180 +0,0 @@
-/**
- * @license
- * Copyright 2012 Dan Vanderkam (danvdk@gmail.com)
- * MIT-licensed (http://opensource.org/licenses/MIT)
- */
-
-(function() {
-'use strict';
-
-/**
- * @fileoverview Adds support for dashed lines to the HTML5 canvas.
- *
- * Usage:
- *   var ctx = canvas.getContext("2d");
- *   ctx.installPattern([10, 5])  // draw 10 pixels, skip 5 pixels, repeat.
- *   ctx.beginPath();
- *   ctx.moveTo(100, 100);  // start the first line segment.
- *   ctx.lineTo(150, 200);
- *   ctx.lineTo(200, 100);
- *   ctx.moveTo(300, 150);  // start a second, unconnected line
- *   ctx.lineTo(400, 250);
- *   ...
- *   ctx.stroke();          // draw the dashed line.
- *   ctx.uninstallPattern();
- *
- * This is designed to leave the canvas untouched when it's not used.
- * If you never install a pattern, or call uninstallPattern(), then the canvas
- * will be exactly as it would have if you'd never used this library. The only
- * difference from the standard canvas will be the "installPattern" method of
- * the drawing context.
- */
-
-/**
- * Change the stroking style of the canvas drawing context from a solid line to
- * a pattern (e.g. dashes, dash-dot-dash, etc.)
- *
- * Once you've installed the pattern, you can draw with it by using the
- * beginPath(), moveTo(), lineTo() and stroke() method calls. Note that some
- * more advanced methods (e.g. quadraticCurveTo() and bezierCurveTo()) are not
- * supported. See file overview for a working example.
- *
- * Side effects of calling this method include adding an "isPatternInstalled"
- * property and "uninstallPattern" method to this particular canvas context.
- * You must call uninstallPattern() before calling installPattern() again.
- *
- * @param {Array.<number>} pattern A description of the stroke pattern. Even
- * indices indicate a draw and odd indices indicate a gap (in pixels). The
- * array should have a even length as any odd lengthed array could be expressed
- * as a smaller even length array.
- */
-CanvasRenderingContext2D.prototype.installPattern = function(pattern) {
-  if (typeof(this.isPatternInstalled) !== 'undefined') {
-    throw "Must un-install old line pattern before installing a new one.";
-  }
-  this.isPatternInstalled = true;
-
-  var dashedLineToHistory = [0, 0];
-
-  // list of connected line segements:
-  // [ [x1, y1], ..., [xn, yn] ], [ [x1, y1], ..., [xn, yn] ]
-  var segments = [];
-
-  // Stash away copies of the unmodified line-drawing functions.
-  var realBeginPath = this.beginPath;
-  var realLineTo = this.lineTo;
-  var realMoveTo = this.moveTo;
-  var realStroke = this.stroke;
-
-  /** @type {function()|undefined} */
-  this.uninstallPattern = function() {
-    this.beginPath = realBeginPath;
-    this.lineTo = realLineTo;
-    this.moveTo = realMoveTo;
-    this.stroke = realStroke;
-    this.uninstallPattern = undefined;
-    this.isPatternInstalled = undefined;
-  };
-
-  // Keep our own copies of the line segments as they're drawn.
-  this.beginPath = function() {
-    segments = [];
-    realBeginPath.call(this);
-  };
-  this.moveTo = function(x, y) {
-    segments.push([[x, y]]);
-    realMoveTo.call(this, x, y);
-  };
-  this.lineTo = function(x, y) {
-    var last = segments[segments.length - 1];
-    last.push([x, y]);
-  };
-
-  this.stroke = function() {
-    if (segments.length === 0) {
-      // Maybe the user is drawing something other than a line.
-      // TODO(danvk): test this case.
-      realStroke.call(this);
-      return;
-    }
-
-    for (var i = 0; i < segments.length; i++) {
-      var seg = segments[i];
-      var x1 = seg[0][0], y1 = seg[0][1];
-      for (var j = 1; j < seg.length; j++) {
-        // Draw a dashed line from (x1, y1) - (x2, y2)
-        var x2 = seg[j][0], y2 = seg[j][1];
-        this.save();
-
-        // Calculate transformation parameters
-        var dx = (x2-x1);
-        var dy = (y2-y1);
-        var len = Math.sqrt(dx*dx + dy*dy);
-        var rot = Math.atan2(dy, dx);
-
-        // Set transformation
-        this.translate(x1, y1);
-        realMoveTo.call(this, 0, 0);
-        this.rotate(rot);
-
-        // Set last pattern index we used for this pattern.
-        var patternIndex = dashedLineToHistory[0];
-        var x = 0;
-        while (len > x) {
-          // Get the length of the pattern segment we are dealing with.
-          var segment = pattern[patternIndex];
-          // If our last draw didn't complete the pattern segment all the way
-          // we will try to finish it. Otherwise we will try to do the whole
-          // segment.
-          if (dashedLineToHistory[1]) {
-            x += dashedLineToHistory[1];
-          } else {
-            x += segment;
-          }
-
-          if (x > len) {
-            // We were unable to complete this pattern index all the way, keep
-            // where we are the history so our next draw continues where we
-            // left off in the pattern.
-            dashedLineToHistory = [patternIndex, x-len];
-            x = len;
-          } else {
-            // We completed this patternIndex, we put in the history that we
-            // are on the beginning of the next segment.
-            dashedLineToHistory = [(patternIndex+1)%pattern.length, 0];
-          }
-
-          // We do a line on a even pattern index and just move on a odd
-          // pattern index.  The move is the empty space in the dash.
-          if (patternIndex % 2 === 0) {
-            realLineTo.call(this, x, 0);
-          } else {
-            realMoveTo.call(this, x, 0);
-          }
-
-          // If we are not done, next loop process the next pattern segment, or
-          // the first segment again if we are at the end of the pattern.
-          patternIndex = (patternIndex+1) % pattern.length;
-        }
-
-        this.restore();
-        x1 = x2;
-        y1 = y2;
-      }
-    }
-    realStroke.call(this);
-    segments = [];
-  };
-};
-
-/**
- * Removes the previously-installed pattern.
- * You must call installPattern() before calling this. You can install at most
- * one pattern at a time--there is no pattern stack.
- */
-CanvasRenderingContext2D.prototype.uninstallPattern = function() {
-  // This will be replaced by a non-error version when a pattern is installed.
-  throw "Must install a line pattern before uninstalling it.";
-};
-
-})();
diff --git a/tests/dashed-canvas.html b/tests/dashed-canvas.html
deleted file mode 100644
index c80b3fc..0000000
--- a/tests/dashed-canvas.html
+++ /dev/null
@@ -1,58 +0,0 @@
-<html>
-<body>
-<p>You should see solid black and blue lines with a dashed red line in between
-them:</p>
-<canvas id=cnv width=640 height=480></canvas>
-
-<p>You should see a solid black line:</p>
-<canvas id=cnv2 width=640 height=100></canvas>
-
-<script type="text/javascript">
-ctx = document.getElementById("cnv").getContext("2d");
-ctx2 = document.getElementById("cnv2").getContext("2d");
-
-// Draw a line segment -- should be perfectly normal.
-ctx.lineWidth = 2;
-ctx.save();
-ctx.beginPath();
-ctx.moveTo(80, 50);
-ctx.lineTo(280, 400);
-ctx.moveTo(330, 400);
-ctx.lineTo(580, 200);
-ctx.stroke();
-
-// Draw a dashed line segment.
-// ctx.installPattern([10, 10]);
-ctx.setLineDash([10, 10]);
-ctx.strokeStyle = 'red';
-ctx.beginPath();
-ctx.moveTo(100, 50);
-ctx.lineTo(300, 400);
-ctx.lineTo(300, 450);
-ctx.moveTo(350, 450);
-ctx.lineTo(350, 400);
-ctx.lineTo(600, 200);
-ctx.stroke();
-
-// An unrelated canvas should not be aware of the pattern.
-ctx2.beginPath();
-ctx2.moveTo(100, 50);
-ctx2.lineTo(600, 50);
-ctx2.stroke();
-
-// ctx.uninstallPattern();
-ctx.setLineDash([]);
-
-// Now that we've uninstalled the pattern, should be normal again.
-ctx.strokeStyle = 'blue';
-ctx.beginPath();
-ctx.moveTo(120, 50);
-ctx.lineTo(320, 400);
-ctx.moveTo(370, 400);
-ctx.lineTo(620, 200);
-ctx.stroke();
-
-ctx.restore();
-</script>
-</body>
-</html>
-- 
2.7.4