checkfunc is mainly replaced by doku_hasTextBeenModified, which is put
in  global scope to allow overriding by plugins.

- if #wiki__text (the default DokuWiki editor field) exists, the
checkfunc() checks whether the field content is changed
- if #wiki__text not exists it assumes that on all change and keydown
events the content of the form #dw__editform is changed (give still
false positives.) (for example the Data plugin has none #wiki__text)

Fixes #1199

This reverts commit ba6c070e.
This reverts commit 92351008.

The security token here doesn't improve the security as the other
requests that allow you to do the same thing aren't protected and I
don't see why locking or draft creation should be subject of XSRF
attacks.

This disables lock and draft creation for pages the user can't edit. It
additionally adds a security token to the draft creation and deletion
request so - at least for logged in users - drafts can't be created,
modified or deleted so easily anymore.

This works around a new "feature/bug" of Firefox 4.

I also adjusted the coding style to match our other JS classes

When creating new pages, no date field is added in the edit form.

The keydown event can't be prevented in Opera (see
http://www.quirksmode.org/dom/events/keys.html) so this switches back to
keypress in Opera (keypress doesn't give the correct key codes in
Firefox). Furthermore Opera replaces '\n' by '\r\n' when inserting text,
thus the offset for cursor/selection placement was wrong.

besides via Save or Preview button. This has been successfully tested in FF,
Chrome and IE6/7/8. Opera does not support onbeforeunload, therefore the draft
is kept if the user navigates away from the editor.

Please test this.

  * Syntax error fixed
  * lock refresh event is now attached to the whole edit form since it bubbles
    up and we cannot be sure that the wikitext input exists on all edit forms
  * Updated findPos(X|Y)
  * Easier and less error-prone way of getting the section edit button in the
    highlight mouseover event handler

This patch disables all keyhandling (as used for automatic list indention)
when some text is selected. This fixes unexpected behavior when selecting
some text at the start of a list item and hitting backspace.

Ignore-this: 87db996b332355addacd81b1ac13b0ab

darcs-hash:20091125144759-6e07b-601ea98a48d9d3c9dd3508cdb9cde9b86c83a5a3.gz

Ignore-this: bd910501ef05d1341c1d67648dc66e32
Firefox doesn't send correct keycodes in onkeypress events

darcs-hash:20091125085224-6e07b-ffce34608064ffe62708da5efb3065103ca95eda.gz