From c3d128d38aa00f4dadfe2df3f9d9abc58a56af3b Mon Sep 17 00:00:00 2001
From: "Brian E. Granger" <ellisonbg@gmail.com>
Date: Wed, 25 Sep 2013 19:21:54 -0700
Subject: [PATCH] Adjust tab completion widget if too close to bottom of page.

---
 IPython/html/static/notebook/js/completer.js | 55 +++++++++++++++-----
 1 file changed, 41 insertions(+), 14 deletions(-)

diff --git a/IPython/html/static/notebook/js/completer.js b/IPython/html/static/notebook/js/completer.js
index fd05a217d..fce043717 100644
--- a/IPython/html/static/notebook/js/completer.js
+++ b/IPython/html/static/notebook/js/completer.js
@@ -199,15 +199,32 @@ var IPython = (function (IPython) {
         this.complete.attr('id', 'complete');
 
         this.sel = $('<select style="width: auto"/>').attr('multiple', 'true').attr('size', Math.min(10, this.raw_result.length));
-        //var pos = this.editor.cursorCoords();
-		var cur = this.editor.getCursor();
-		cur.ch = cur.ch-matched_text.length;
-		var pos = this.editor.cursorCoords(cur);
-        this.complete.css('left', pos.left-3 + 'px');
-        this.complete.css('top', pos.bottom+1 + 'px');
         this.complete.append(this.sel);
-
         $('body').append(this.complete);
+
+        // After everything is on the page compute the postion.
+        // We invert the completion list and put it above the code if it is too
+        // close to the bottom of the page.
+        var cur = this.editor.getCursor();
+        cur.ch = cur.ch-matched_text.length;
+        var pos = this.editor.cursorCoords(cur);
+        var invert = false;
+        var left = pos.left-3;
+        var top;
+        var cheight = this.complete.height();
+        var wheight = $(window).height();
+        console.log(pos.bottom, cheight, wheight)
+        if (pos.bottom+cheight+5 > wheight) {
+            invert = true;
+            top = pos.top-cheight-4;
+        } else {
+            invert = false;
+            top = pos.bottom+1;
+        }
+        this.complete.css('left', left + 'px');
+        this.complete.css('top', top + 'px');
+
+
         //build the container
         var that = this;
         this.sel.dblclick(function () {
@@ -218,7 +235,7 @@ var IPython = (function (IPython) {
             that.keydown(event);
         });
 
-        this.build_gui_list(this.raw_result);
+        this.build_gui_list(this.raw_result, invert);
 
         this.sel.focus();
         // Opera sometimes ignores focusing a freshly created node
@@ -232,13 +249,23 @@ var IPython = (function (IPython) {
         this.editor.replaceRange(completion.str, completion.from, completion.to);
     }
 
-    Completer.prototype.build_gui_list = function (completions) {
-        // Need to clear the all list
-        for (var i = 0; i < completions.length; ++i) {
-            var opt = $('<option/>').text(completions[i].str).addClass(completions[i].type);
-            this.sel.append(opt);
+    Completer.prototype.build_gui_list = function (completions, invert) {
+        invert = invert || false;
+        if (!invert) {
+            for (var i = 0; i < completions.length; ++i) {
+                var opt = $('<option/>').text(completions[i].str).addClass(completions[i].type);
+                this.sel.append(opt);
+            }
+            this.sel.children().first().attr('selected', 'true');
+            this.sel.scrollTop(0);
+        } else {
+            for (var i = (completions.length-1); i > -1; --i) {
+                var opt = $('<option/>').text(completions[i].str).addClass(completions[i].type);
+                this.sel.append(opt);
+            }
+            this.sel.children().last().attr('selected', 'true');
+            this.sel.scrollTop(this.sel[0].scrollHeight);
         }
-        this.sel.children().first().attr('selected', 'true');
     }
 
     Completer.prototype.close = function () {