Do not display start and end periods on hover by default

This reverts following commits
 - 74070e0.
 - ba48115.
 - 94a164e.

Author: archmoj

src/components/fx/hover.js

@@ -20,7 +20,6 @@ var Drawing = require('../drawing');
 var Color = require('../color');
 var dragElement = require('../dragelement');
 var Axes = require('../../plots/cartesian/axes');
-var instanceOrPeriod = require('../../plots/cartesian/instance_or_period');
 var Registry = require('../../registry');
 
 var helpers = require('./helpers');
@@ -1590,17 +1589,11 @@ function cleanPoint(d, hovermode) {
 
     // and convert the x and y label values into formatted text
     if(d.xLabelVal !== undefined) {
-        if(!('xLabel' in d)) {
-            var xx = instanceOrPeriod(d, trace, 'x');
-            d.xLabel = Axes.hoverLabelText(d.xa, xx[0], xx[1]);
-        }
+        d.xLabel = ('xLabel' in d) ? d.xLabel : Axes.hoverLabelText(d.xa, d.xLabelVal);
         d.xVal = d.xa.c2d(d.xLabelVal);
     }
     if(d.yLabelVal !== undefined) {
-        if(!('yLabel' in d)) {
-            var yy = instanceOrPeriod(d, trace, 'y');
-            d.yLabel = Axes.hoverLabelText(d.ya, yy[0], yy[1]);
-        }
+        d.yLabel = ('yLabel' in d) ? d.yLabel : Axes.hoverLabelText(d.ya, d.yLabelVal);
         d.yVal = d.ya.c2d(d.yLabelVal);
     }
 

src/plots/cartesian/instance_or_period.js

@@ -11,7 +11,6 @@
 
 var barHover = require('../bar/hover').hoverPoints;
 var hoverLabelText = require('../../plots/cartesian/axes').hoverLabelText;
-var instanceOrPeriod = require('../../plots/cartesian/instance_or_period');
 
 module.exports = function hoverPoints(pointData, xval, yval, hovermode) {
     var pts = barHover(pointData, xval, yval, hovermode);
@@ -24,15 +23,8 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode) {
 
     if(!trace.cumulative.enabled) {
         var posLetter = trace.orientation === 'h' ? 'y' : 'x';
-        var pp = instanceOrPeriod(pointData, trace, posLetter);
-        var ax = pointData[posLetter + 'a'];
-        var label;
-        if(pp[1] !== undefined) {
-            label = hoverLabelText(ax, pp[0], pp[1]);
-        } else {
-            label = hoverLabelText(ax, di.ph0, di.ph1);
-        }
-        pointData[posLetter + 'Label'] = label;
+
+        pointData[posLetter + 'Label'] = hoverLabelText(pointData[posLetter + 'a'], di.ph0, di.ph1);
     }
 
     return pts;

src/traces/histogram/hover.js

@@ -11,7 +11,6 @@
 
 var heatmapHover = require('../heatmap/hover');
 var hoverLabelText = require('../../plots/cartesian/axes').hoverLabelText;
-var instanceOrPeriod = require('../../plots/cartesian/instance_or_period');
 
 module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLayer, contour) {
     var pts = heatmapHover(pointData, xval, yval, hovermode, hoverLayer, contour);
@@ -23,33 +22,11 @@ module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLay
     var ny = indices[0];
     var nx = indices[1];
     var cd0 = pointData.cd[0];
-    var trace = cd0.trace;
     var xRange = cd0.xRanges[nx];
     var yRange = cd0.yRanges[ny];
 
-    var x0 = xRange[0];
-    var x1 = xRange[1];
-    var xx = instanceOrPeriod(pointData, trace, 'x');
-    var xa = pointData.xa;
-    var xLabel;
-    if(xx[1] !== undefined) {
-        xLabel = hoverLabelText(xa, xx[0], xx[1]);
-    } else {
-        xLabel = hoverLabelText(xa, x0, x1);
-    }
-    pointData.xLabel = xLabel;
-
-    var y0 = yRange[0];
-    var y1 = yRange[1];
-    var yy = instanceOrPeriod(pointData, trace, 'y');
-    var ya = pointData.ya;
-    var yLabel;
-    if(yy[1] !== undefined) {
-        yLabel = hoverLabelText(ya, yy[0], yy[1]);
-    } else {
-        yLabel = hoverLabelText(ya, y0, y1);
-    }
-    pointData.yLabel = yLabel;
+    pointData.xLabel = hoverLabelText(pointData.xa, xRange[0], xRange[1]);
+    pointData.yLabel = hoverLabelText(pointData.ya, yRange[0], yRange[1]);
 
     return pts;
 };