Provide room for large computed margins

src/plots/plots.js

@@ -1864,6 +1864,9 @@ function initMargins(fullLayout) {
     if(!fullLayout._pushmarginIds) fullLayout._pushmarginIds = {};
 }
 
+var minFinalWidth = 64; // could possibly be exposed as layout.margin.minfinalwidth
+var minFinalHeight = 64; // could possibly be exposed as layout.margin.minfinalheight
+
 /**
  * autoMargin: called by components that may need to expand the margins to
  * be rendered on-plot.
@@ -1881,6 +1884,10 @@ function initMargins(fullLayout) {
  */
 plots.autoMargin = function(gd, id, o) {
     var fullLayout = gd._fullLayout;
+    var width = fullLayout.width;
+    var height = fullLayout.height;
+    var maxSpaceW = Math.max(0, width - minFinalWidth);
+    var maxSpaceH = Math.max(0, height - minFinalHeight);
 
     var pushMargin = fullLayout._pushmargin;
     var pushMarginIds = fullLayout._pushmarginIds;
@@ -1900,13 +1907,15 @@ plots.autoMargin = function(gd, id, o) {
 
             // if the item is too big, just give it enough automargin to
             // make sure you can still grab it and bring it back
-            if(o.l + o.r > fullLayout.width * 0.5) {
-                Lib.log('Margin push', id, 'is too big in x, dropping');
-                o.l = o.r = 0;
+            var rW = (o.l + o.r) / maxSpaceW;
+            if(rW > 1) {
+                o.l /= rW;
+                o.r /= rW;
             }
-            if(o.b + o.t > fullLayout.height * 0.5) {
-                Lib.log('Margin push', id, 'is too big in y, dropping');
-                o.b = o.t = 0;
+            var rH = (o.t + o.b) / maxSpaceH;
+            if(rH > 1) {
+                o.t /= rH;
+                o.b /= rH;
             }
 
             var xl = o.xl !== undefined ? o.xl : o.x;
@@ -1931,6 +1940,11 @@ plots.autoMargin = function(gd, id, o) {
 
 plots.doAutoMargin = function(gd) {
     var fullLayout = gd._fullLayout;
+    var width = fullLayout.width;
+    var height = fullLayout.height;
+    var maxSpaceW = Math.max(0, width - minFinalWidth);
+    var maxSpaceH = Math.max(0, height - minFinalHeight);
+
     if(!fullLayout._size) fullLayout._size = {};
     initMargins(fullLayout);
 
@@ -1945,8 +1959,6 @@ plots.doAutoMargin = function(gd) {
     var mr = margin.r;
     var mt = margin.t;
     var mb = margin.b;
-    var width = fullLayout.width;
-    var height = fullLayout.height;
     var pushMargin = fullLayout._pushmargin;
     var pushMarginIds = fullLayout._pushmarginIds;
 
@@ -1978,11 +1990,10 @@ plots.doAutoMargin = function(gd) {
                 if(isNumeric(pl) && pushMargin[k2].r) {
                     var fr = pushMargin[k2].r.val;
                     var pr = pushMargin[k2].r.size;
-
                     if(fr > fl) {
                         var newL = (pl * fr + (pr - width) * fl) / (fr - fl);
                         var newR = (pr * (1 - fl) + (pl - width) * (1 - fr)) / (fr - fl);
-                        if(newL >= 0 && newR >= 0 && width - (newL + newR) > 0 && newL + newR > ml + mr) {
+                        if(newL + newR > ml + mr) {
                             ml = newL;
                             mr = newR;
                         }
@@ -1992,11 +2003,10 @@ plots.doAutoMargin = function(gd) {
                 if(isNumeric(pb) && pushMargin[k2].t) {
                     var ft = pushMargin[k2].t.val;
                     var pt = pushMargin[k2].t.size;
-
                     if(ft > fb) {
                         var newB = (pb * ft + (pt - height) * fb) / (ft - fb);
                         var newT = (pt * (1 - fb) + (pb - height) * (1 - ft)) / (ft - fb);
-                        if(newB >= 0 && newT >= 0 && height - (newT + newB) > 0 && newB + newT > mb + mt) {
+                        if(newB + newT > mb + mt) {
                             mb = newB;
                             mt = newT;
                         }
@@ -2006,6 +2016,18 @@ plots.doAutoMargin = function(gd) {
         }
     }
 
+    var rW = (ml + mr) / maxSpaceW;
+    if(rW > 1) {
+        ml /= rW;
+        mr /= rW;
+    }
+
+    var rH = (mb + mt) / maxSpaceH;
+    if(rH > 1) {
+        mb /= rH;
+        mt /= rH;
+    }
+
     gs.l = Math.round(ml);
     gs.r = Math.round(mr);
     gs.t = Math.round(mt);

test/image/mocks/automargin-large-margins-both-sides.json

@@ -0,0 +1,54 @@
+{
+    "data": [{
+            "name": "< D E A T H >",
+            "marker": { "color": "red" },
+            "y": [
+                "Antonio Vivaldi",
+                "Johann Sebastian Bach",
+                "Wolfgang Amadeus Mozart",
+                "Ludwig van Beethoven"
+            ],
+            "x": [
+                "1741",
+                "1750",
+                "1791",
+                "1827"
+            ]
+    },
+    {
+        "name": "< B I R T H >",
+        "marker": { "color": "blue" },
+        "y": [
+            "Antonio Vivaldi",
+            "Johann Sebastian Bach",
+            "Wolfgang Amadeus Mozart",
+            "Ludwig van Beethoven"
+        ],
+        "x": [
+            "1678",
+            "1685",
+            "1756",
+            "1770"
+        ]
+    }],
+    "layout": {
+        "title": {
+            "text": "Longest and shortest<br>names and time periods"
+        },
+        "width": 200,
+        "height": 200,
+        "margin": {
+            "t": 80,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "xaxis": {
+            "type": "date",
+            "automargin": true
+        },
+        "yaxis": {
+            "automargin": true
+        }
+    }
+}

test/image/mocks/automargin-large-margins-horizontal.json

@@ -0,0 +1,55 @@
+{
+    "data": [{
+            "name": "< D E A T H >",
+            "marker": { "color": "red" },
+            "y": [
+                "Antonio Vivaldi",
+                "Johann Sebastian Bach",
+                "Wolfgang Amadeus Mozart",
+                "Ludwig van Beethoven"
+            ],
+            "x": [
+                "1741",
+                "1750",
+                "1791",
+                "1827"
+            ]
+    },
+    {
+        "name": "< B I R T H >",
+        "marker": { "color": "blue" },
+        "y": [
+            "Antonio Vivaldi",
+            "Johann Sebastian Bach",
+            "Wolfgang Amadeus Mozart",
+            "Ludwig van Beethoven"
+        ],
+        "x": [
+            "1678",
+            "1685",
+            "1756",
+            "1770"
+        ]
+    }],
+    "layout": {
+        "showlegend": false,
+        "title": {
+            "text": "Longest and shortest<br>names and time periods"
+        },
+        "width": 240,
+        "height": 200,
+        "margin": {
+            "t": 80,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "xaxis": {
+            "type": "date",
+            "automargin": true
+        },
+        "yaxis": {
+            "automargin": true
+        }
+    }
+}

test/image/mocks/automargin-large-margins.json

@@ -0,0 +1,54 @@
+{
+    "data": [{
+            "name": "< D E A T H >",
+            "marker": { "color": "red" },
+            "x": [
+                "Antonio Vivaldi",
+                "Johann Sebastian Bach",
+                "Wolfgang Amadeus Mozart",
+                "Ludwig van Beethoven"
+            ],
+            "y": [
+                "1741",
+                "1750",
+                "1791",
+                "1827"
+            ]
+    },
+    {
+        "name": "< B I R T H >",
+        "marker": { "color": "blue" },
+        "x": [
+            "Antonio Vivaldi",
+            "Johann Sebastian Bach",
+            "Wolfgang Amadeus Mozart",
+            "Ludwig van Beethoven"
+        ],
+        "y": [
+            "1678",
+            "1685",
+            "1756",
+            "1770"
+        ]
+    }],
+    "layout": {
+        "title": {
+            "text": "Longest and shortest<br>names and time periods"
+        },
+        "width": 240,
+        "height": 300,
+        "margin": {
+            "t": 80,
+            "b": 20,
+            "l": 20,
+            "r": 20
+        },
+        "yaxis": {
+            "type": "date",
+            "automargin": true
+        },
+        "xaxis": {
+            "automargin": true
+        }
+    }
+}

test/jasmine/tests/axes_test.js

@@ -3856,7 +3856,7 @@ describe('Test axes', function() {
             .then(function() { return Plotly.relayout(gd, 'height', 100); })
             .then(function() {
                 _assert('after relayout to *small* height', {
-                    bottomLowerBound: 30,
+                    bottomLowerBound: 15,
                     totalHeight: 100
                 });
             })
@@ -3896,7 +3896,7 @@ describe('Test axes', function() {
             .then(function() { return Plotly.relayout(gd, 'width', 100); })
             .then(function() {
                 _assert('after relayout to *small* width', {
-                    leftLowerBound: 30,
+                    leftLowerBound: 15,
                     totalWidth: 100
                 });
             })

test/jasmine/tests/indicator_test.js

@@ -171,7 +171,7 @@ describe('Indicator plot', function() {
                 return Plotly.relayout(gd, {width: 200, height: 200});
             })
             .then(function() {
-                checkNumbersScale(0.2, 'should scale down');
+                checkNumbersScale(0.4794007490636704, 'should scale down');
                 return Plotly.relayout(gd, {width: 400, height: 400});
             })
             .then(function() {

test/jasmine/tests/legend_scroll_test.js

@@ -405,7 +405,7 @@ describe('The legend', function() {
                 expect(countLegendClipPaths(gd)).toBe(1);
 
                 // clippath resized to new height less than new plot height
-                expect(+legendHeight).toBe(getPlotHeight(gd));
+                expect(+legendHeight).toBeGreaterThan(getPlotHeight(gd));
                 expect(+legendHeight).toBeLessThan(+origLegendHeight);
 
                 done();

test/jasmine/tests/mock_test.js

@@ -39,6 +39,9 @@ var list = [
     'annotations',
     'annotations-autorange',
     'arrow-markers',
+    'automargin-large-margins',
+    'automargin-large-margins-both-sides',
+    'automargin-large-margins-horizontal',
     'automargin-mirror-all',
     'automargin-mirror-allticks',
     'automargin-multiline-titles',
@@ -1103,6 +1106,9 @@ figs['animation_bar'] = require('@mocks/animation_bar');
 // figs['annotations'] = require('@mocks/annotations');
 // figs['annotations-autorange'] = require('@mocks/annotations-autorange');
 figs['arrow-markers'] = require('@mocks/arrow-markers');
+figs['automargin-large-margins'] = require('@mocks/automargin-large-margins');
+figs['automargin-large-margins-both-sides'] = require('@mocks/automargin-large-margins-both-sides');
+figs['automargin-large-margins-horizontal'] = require('@mocks/automargin-large-margins-horizontal');
 figs['automargin-mirror-all'] = require('@mocks/automargin-mirror-all');
 figs['automargin-mirror-allticks'] = require('@mocks/automargin-mirror-allticks');
 figs['automargin-multiline-titles'] = require('@mocks/automargin-multiline-titles');