Support auto-resize for classic notebook iplot

Add the auto-resize logic when figure is displayed in the classic
notebook using iplot.

Author: jonmmease

Diff for: plotly/offline/offline.py

@@ -358,8 +358,12 @@ def iplot(figure_or_data, show_link=True, link_text='Export to plot.ly',
         plot_html, plotdivid, width, height = _plot_html(
             figure_or_data, config, validate, '100%', 525, True
         )
-        display_bundle['text/html'] = plot_html
-        display_bundle['text/vnd.plotly.v1+html'] = plot_html
+        resize_script = ''
+        if width == '100%' or height == '100%':
+            resize_script = _build_resize_script(plotdivid)
+
+        display_bundle['text/html'] = plot_html + resize_script
+        display_bundle['text/vnd.plotly.v1+html'] = plot_html + resize_script
 
     ipython_display.display(display_bundle, raw=True)
 
@@ -389,6 +393,17 @@ def iplot(figure_or_data, show_link=True, link_text='Export to plot.ly',
         ipython_display.display(ipython_display.HTML(script))
 
 
+def _build_resize_script(plotdivid):
+    resize_script = (
+        ''
+        '<script type="text/javascript">'
+        'window.addEventListener("resize", function(){{'
+        'Plotly.Plots.resize(document.getElementById("{id}"));}});'
+        '</script>'
+    ).format(id=plotdivid)
+    return resize_script
+
+
 def plot(figure_or_data, show_link=True, link_text='Export to plot.ly',
          validate=True, output_type='file', include_plotlyjs=True,
          filename='temp-plot.html', auto_open=True, image=None,
@@ -477,13 +492,7 @@ def plot(figure_or_data, show_link=True, link_text='Export to plot.ly',
 
     resize_script = ''
     if width == '100%' or height == '100%':
-        resize_script = (
-            ''
-            '<script type="text/javascript">'
-            'window.addEventListener("resize", function(){{'
-            'Plotly.Plots.resize(document.getElementById("{id}"));}});'
-            '</script>'
-        ).format(id=plotdivid)
+        resize_script = _build_resize_script(plotdivid)
 
     if output_type == 'file':
         with open(filename, 'w') as f: