Merge pull request #4392 from plotly/resize-reject

Plots.resize: promises should always be resolved

Author: antoinerg

src/plots/plots.js

@@ -76,12 +76,15 @@ plots.redrawText = function(gd) {
 plots.resize = function(gd) {
     gd = Lib.getGraphDiv(gd);
 
-    return new Promise(function(resolve, reject) {
+    var resolveLastResize;
+    var p = new Promise(function(resolve, reject) {
         if(!gd || Lib.isHidden(gd)) {
             reject(new Error('Resize must be passed a displayed plot div element.'));
         }
 
         if(gd._redrawTimer) clearTimeout(gd._redrawTimer);
+        if(gd._resolveResize) resolveLastResize = gd._resolveResize;
+        gd._resolveResize = resolve;
 
         gd._redrawTimer = setTimeout(function() {
             // return if there is nothing to resize or is hidden
@@ -101,10 +104,17 @@ plots.resize = function(gd) {
 
             Registry.call('relayout', gd, {autosize: true}).then(function() {
                 gd.changed = oldchanged;
-                resolve(gd);
+                // Only resolve if a new call hasn't been made!
+                if(gd._resolveResize === resolve) {
+                    delete gd._resolveResize;
+                    resolve(gd);
+                }
             });
         }, 100);
     });
+
+    if(resolveLastResize) resolveLastResize(p);
+    return p;
 };
 
 

test/jasmine/tests/plots_test.js

@@ -412,6 +412,31 @@ describe('Test Plots', function() {
                     .then(done);
             });
         });
+
+        describe('returns Promises', function() {
+            afterEach(destroyGraphDiv);
+
+            it('should resolve them all', function(done) {
+                gd = createGraphDiv();
+                var p = [];
+                Plotly.newPlot(gd, [{y: [5, 2, 5]}])
+                    .then(function() {
+                        gd.style.width = '500px';
+                        gd.style.height = '500px';
+                        p.push(Plotly.Plots.resize(gd));
+                        p.push(Plotly.Plots.resize(gd));
+                        p.push(Plotly.Plots.resize(gd));
+                        return Promise.all(p);
+                    })
+                    .then(function(v) {
+                        // Make sure they all resolve to the same value
+                        expect(v[0]).toEqual(v[1]);
+                        expect(v[1]).toEqual(v[2]);
+                    })
+                    .catch(failTest)
+                    .then(done);
+            });
+        });
     });
 
     describe('Plots.purge', function() {