speed up 'axrange' edits

- by just calling 'Axes.doTicks' instead of full `doTicksRelayout`
  which includes drawing the title
- this also fixes (and locks) a bug where large splom would draw twice
  (once in doTicksRelayout and once in the drawData subroutine).

Author: etpinard

Diff for: src/plot_api/plot_api.js

@@ -1738,8 +1738,8 @@ function addAxRangeSequence(seq, rangesAltered) {
     // subroutine of its own so that finalDraw always gets
     // executed after drawData
     var doTicks = rangesAltered ?
-        function(gd) { return subroutines.doTicksRelayout(gd, rangesAltered); } :
-        subroutines.doTicksRelayout;
+        function(gd) { return Axes.doTicks(gd, Object.keys(rangesAltered), true); } :
+        function(gd) { return Axes.doTicks(gd, 'redraw'); };
 
     seq.push(
         subroutines.doAutoRangeAndConstraints,

Diff for: src/plot_api/subroutines.js

@@ -498,12 +498,8 @@ exports.doLegend = function(gd) {
     return Plots.previousPromises(gd);
 };
 
-exports.doTicksRelayout = function(gd, rangesAltered) {
-    if(rangesAltered) {
-        Axes.doTicks(gd, Object.keys(rangesAltered), true);
-    } else {
-        Axes.doTicks(gd, 'redraw');
-    }
+exports.doTicksRelayout = function(gd) {
+    Axes.doTicks(gd, 'redraw');
 
     if(gd._fullLayout._hasOnlyLargeSploms) {
         clearGlCanvases(gd);

Diff for: test/jasmine/tests/plot_api_test.js

@@ -6,6 +6,7 @@ var Queue = require('@src/lib/queue');
 var Scatter = require('@src/traces/scatter');
 var Bar = require('@src/traces/bar');
 var Legend = require('@src/components/legend');
+var Axes = require('@src/plots/cartesian/axes');
 var pkg = require('../../../package.json');
 var subroutines = require('@src/plot_api/subroutines');
 var helpers = require('@src/plot_api/helpers');
@@ -531,12 +532,14 @@ describe('Test plot api', function() {
             mockedMethods.forEach(function(m) {
                 spyOn(subroutines, m);
             });
+            spyOn(Axes, 'doTicks');
         });
 
         function mock(gd) {
             mockedMethods.forEach(function(m) {
                 subroutines[m].calls.reset();
             });
+            Axes.doTicks.calls.reset();
 
             supplyAllDefaults(gd);
             Plots.doCalcdata(gd);
@@ -634,7 +637,7 @@ describe('Test plot api', function() {
         });
 
         it('should trigger minimal sequence for cartesian axis range updates', function() {
-            var seq = ['doAutoRangeAndConstraints', 'doTicksRelayout', 'drawData', 'finalDraw'];
+            var seq = ['doAutoRangeAndConstraints', 'drawData', 'finalDraw'];
 
             function _assert(msg) {
                 expect(gd.calcdata).toBeDefined();
@@ -644,6 +647,9 @@ describe('Test plot api', function() {
                         '# of ' + m + ' calls - ' + msg
                     );
                 });
+                expect(Axes.doTicks).toHaveBeenCalledTimes(1);
+                expect(Axes.doTicks.calls.allArgs()[0][1]).toEqual(['x']);
+                expect(Axes.doTicks.calls.allArgs()[0][2]).toBe(true, 'skip-axis-title argument');
             }
 
             var specs = [
@@ -2588,6 +2594,7 @@ describe('Test plot api', function() {
             spyOn(annotations, 'drawOne').and.callThrough();
             spyOn(annotations, 'draw').and.callThrough();
             spyOn(images, 'draw').and.callThrough();
+            spyOn(Axes, 'doTicks').and.callThrough();
         });
 
         afterEach(destroyGraphDiv);
@@ -2823,10 +2830,11 @@ describe('Test plot api', function() {
             Plotly.newPlot(gd, data, layout)
             .then(countPlots)
             .then(function() {
+                expect(Axes.doTicks).toHaveBeenCalledWith(gd, '');
                 return Plotly.react(gd, data, layout2);
             })
             .then(function() {
-                expect(subroutines.doTicksRelayout).toHaveBeenCalledTimes(1);
+                expect(Axes.doTicks).toHaveBeenCalledWith(gd, 'redraw');
                 expect(subroutines.layoutStyles).not.toHaveBeenCalled();
             })
             .catch(failTest)

Diff for: test/jasmine/tests/splom_test.js

@@ -1,6 +1,7 @@
 var Plotly = require('@lib');
 var Lib = require('@src/lib');
 var Plots = require('@src/plots/plots');
+var Axes = require('@src/plots/cartesian/axes');
 var SUBPLOT_PATTERN = require('@src/plots/cartesian/constants').SUBPLOT_PATTERN;
 
 var d3 = require('d3');
@@ -747,6 +748,83 @@ describe('Test splom interactions:', function() {
     });
 });
 
+describe('Test splom update switchboard:', function() {
+    var gd;
+
+    beforeEach(function() {
+        gd = createGraphDiv();
+    });
+
+    afterEach(function() {
+        Plotly.purge(gd);
+        destroyGraphDiv();
+    });
+
+    var methods;
+
+    function addSpies() {
+        methods.forEach(function(m) {
+            var obj = m[0];
+            var k = m[1];
+            spyOn(obj, k).and.callThrough();
+        });
+    }
+
+    function assertSpies(msg, exp) {
+        methods.forEach(function(m, i) {
+            var obj = m[0];
+            var k = m[1];
+            var expi = exp[i];
+            expect(obj[k]).toHaveBeenCalledTimes(expi[1], expi[0]);
+            obj[k].calls.reset();
+        });
+    }
+
+    it('@gl should trigger minimal sequence for axis range updates (large splom case)', function(done) {
+        var fig = Lib.extendDeep({}, require('@mocks/splom_large.json'));
+        var matrix, regl, splomGrid;
+
+        Plotly.plot(gd, fig).then(function() {
+            var fullLayout = gd._fullLayout;
+            var trace = gd._fullData[0];
+            var scene = fullLayout._splomScenes[trace.uid];
+            matrix = scene.matrix;
+            regl = matrix.regl;
+            splomGrid = fullLayout._splomGrid;
+
+            methods = [
+                [Plots, 'supplyDefaults'],
+                [Axes, 'doTicks'],
+                [regl, 'clear'],
+                [splomGrid, 'update']
+            ];
+            addSpies();
+
+            expect(fullLayout.xaxis.range).toBeCloseToArray([-0.0921, 0.9574], 1, 'xrng (base)');
+
+            return Plotly.relayout(gd, 'xaxis.range', [0, 1]);
+        })
+        .then(function() {
+            var msg = 'after update';
+
+            assertSpies(msg, [
+                ['supplyDefaults', 1],
+                ['doTicks', 1],
+                ['regl clear', 1],
+                ['splom grid update', 1],
+                ['splom grid draw', 1],
+                ['splom matrix update', 1],
+                ['splom matrix draw', 1]
+            ]);
+
+            expect(gd.layout.xaxis.range).toBeCloseToArray([0, 1], 1, 'xrng ' + msg);
+            expect(gd._fullLayout.xaxis.range).toBeCloseToArray([0, 1], 1, 'xrng ' + msg);
+        })
+        .catch(failTest)
+        .then(done);
+    });
+});
+
 describe('Test splom hover:', function() {
     var gd;