page up: cursor to start if scrolled top already

[peach-html5-editor.git] / editor.coffee

diff --git a/editor.coffee b/editor.coffee
index ef5d3a2..a0bd0a4 100644 (file)
--- a/editor.coffee
+++ b/editor.coffee
@@ -1077,6 +1077,13 @@ class PeachHTML5Editor
                                @kill_cursor()
                return
        on_page_up_key: (e) ->
+               if @wrap2.scrollTop is 0
+                       return unless @cursor?
+                       new_cursor = first_cursor_position @tree
+                       if new_cursor?
+                               if new_cursor.n isnt @cursor.n or new_cursor.i isnt @cursor.i
+                                       @move_cursor new_cursor
+                       return
                if @cursor?
                        screen_y = @cursor.y - @wrap2.scrollTop
                scroll_amount = @wrap2_height - breathing_room
@@ -1084,10 +1091,17 @@ class PeachHTML5Editor
                if @cursor?
                        @move_cursor_into_view screen_y + @wrap2.scrollTop
        on_page_down_key: (e) ->
+               lowest_scrollpos = @wrap2.scrollHeight - @wrap2_height
+               if @wrap2.scrollTop is lowest_scrollpos
+                       return unless @cursor?
+                       new_cursor = last_cursor_position @tree
+                       if new_cursor?
+                               if new_cursor.n isnt @cursor.n or new_cursor.i isnt @cursor.i
+                                       @move_cursor new_cursor
+                       return
                if @cursor?
                        screen_y = @cursor.y - @wrap2.scrollTop
                scroll_amount = @wrap2_height - breathing_room
-               lowest_scrollpos = @wrap2.scrollHeight - @wrap2_height
                @wrap2.scrollTop = Math.min lowest_scrollpos, @wrap2.scrollTop + scroll_amount
                if @cursor?
                        @move_cursor_into_view screen_y + @wrap2.scrollTop