From 0da0566bacc38663cc66899feb246aee378660af Mon Sep 17 00:00:00 2001
From: nightwing <amirjanyan@gmail.com>
Date: Sat, 24 Jan 2015 18:53:41 +0400
Subject: [PATCH] fix pagedown in vim mode

---
 lib/ace/keyboard/vim.js | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/lib/ace/keyboard/vim.js b/lib/ace/keyboard/vim.js
index 4ef12ca4..7312821f 100644
--- a/lib/ace/keyboard/vim.js
+++ b/lib/ace/keyboard/vim.js
@@ -391,13 +391,19 @@ define(function(require, exports, module) {
       sel.moveCursorBy(0, increment);
     }
   };
-  this.findPosV = function(start, amaount, unit, goalColumn) {
+  this.findPosV = function(start, amount, unit, goalColumn) {
+    if (unit == 'page') {
+      var renderer = this.ace.renderer;
+      var config = renderer.layerConfig;
+      amount = amount * Math.floor(config.height / config.lineHeight);
+      unit = 'line';
+    }
     if (unit == 'line') {
       var screenPos = this.ace.session.documentToScreenPosition(start.line, start.ch);
       if (goalColumn != null)
         screenPos.column = goalColumn;
-      screenPos.row += amaount;
-      // not what codemirror does but vim mode needs only it
+      screenPos.row += amount;
+      // not what codemirror does but vim mode needs only this
       screenPos.row = Math.min(Math.max(0, screenPos.row), this.ace.session.getScreenLength() - 1);
       var pos = this.ace.session.screenToDocumentPosition(screenPos.row, screenPos.column);
       return toCmPos(pos);