don't scroll to top when content height changes

diff --git a/editor.coffee b/editor.coffee
index 5dbc566..0a02396 100644 (file)
--- a/editor.coffee
+++ b/editor.coffee
@@ -622,6 +622,7 @@ class PeachHTML5Editor
                @cursor_visible = false
                @poll_for_blur_timeout = null
                @iframe_offset = null
+               @iframe_height = null
                opt_fragment = @options.fragment ? true
                @parser_opts = {}
                if opt_fragment
@@ -817,8 +818,13 @@ class PeachHTML5Editor
                        @load_html @in_el.value
                @adjust_iframe_height()
        adjust_iframe_height: ->
-               @iframe.style.height = "0"
-               @iframe.style.height = "#{@idoc.body.scrollHeight}px"
+               h = parseInt(@idoc.body.scrollHeight, 10)
+               if @iframe_height isnt h
+                       @iframe_height = h
+                       s = @wrap2.scrollTop
+                       @iframe.style.height = "0"
+                       @iframe.style.height = "#{h}px"
+                       @wrap2.scrollTop = s
        kill_cursor: -> # remove it, forget where it was
                if @cursor_visible
                        @cursor_el.parentNode.removeChild @cursor_el