Deutsche Beschreibung:
----------------------

SelectionMenu und CopyLink sind kleine, framework-unabhängige JavaScripte.

SelectionMenu zeigt beim Markieren von Text ein Kontextmenü an. Die Idee und
Umsetzung ähnelt der auf nytimes.com. Das Script ist jedoch einfacher und universell
einsetzbar.

CopyLink fügt eine Quellenreferenz ein, wenn der Benutzer Text markiert und in die
Zwischenablage kopiert. Wenn beispielsweise »Franz jagt im komplett verwahrlosten Taxi«
kopiert wird, so wird die URL der aktuellen Webseite an den kopierten Text angehangen:

»Franz jagt im komplett verwahrlosten Taxi
Quelle: http://example.net/article1234«

Beide Scripte verwenden W3C DOM Range
<http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html> in modernen Browsern sowie
Microsoft TextRanges <http://msdn.microsoft.com/en-us/library/ms535872(v=vs.85).aspx>
für ältere Internet-Explorer-Versionen.

Ausführliche Dokumentation:
http://molily.de/weblog/selectionmenu-copylink

Autor: Mathias Schäfer (molily) <molily@mailbox.org>
Lizenz: Public Domain


English Description:
--------------------

SelectionMenu and CopyLink are small self-contained, framework-agnostic scripts
which demonstrate the abilities of the JavaScript APIs DOM Range and Microsoft
TextRanges.

SelectionMenu shows a context menu when the user selects some text on the page.
This menu may offer a search feature, dictionary lookup, post to Facebook or similar.
The idea and the implementation resembles the selection context menu on nytimes.com,
but the script is way simpler and easy to integrate.

CopyLink inserts a source reference when the user copys a piece of text into the
clipboard. For example, if the user selects the text “The quick brown fox” and copys
it, the URL of the current page will be appended:

“The quick brown fox
Source: http://example.net/article1234”

Both scripts are using W3C DOM Range
<http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html> in modern browsers
and Microsoft TextRanges <http://msdn.microsoft.com/en-us/library/ms535872(v=vs.85).aspx>
as a fallback for older Internet Explorer versions.

Author: Mathias Schäfer (molily) <molily@mailbox.org>
License: Public Domain


SelectionMenu Usage:
--------------------

Create an instance of SelectionMenu by calling “new SelectionMenu”.

Pass an object literal with the following options:
  container (DOM element):
    The element where the copy event is observed. Normally that's
    the main text container.
  menuHTML (string):
    A string of HTML for the menu e.g. a list of links.
  handler (function):
    A handler function which is called when the user clicks on the menu.
    Use the passed click event to access the click link and respond to
    the user's action.
  minimalSelection (number, optional):
    Only display the menu if the selected text has at least this length.
    Defaults to 5 characters.
  id (string, optional):
    The ID of the menu element which is inserted. Defaults to “selection-menu”.

Example:
--------

This observes copy events at the element with the ID “article”. It inserts a menu
with two links which both have IDs to recognize them. In the handler function, the
selected text is read. Depending on the clicked link, the selected text is
looked up on Google or Bing.

new SelectionMenu({
  container : document.getElementById('article'),
  menuHTML : '<a id="selection-menu-google">Google Search</a><a id="selection-menu-bing">Bing Search</a>',
  handler : function (e) {
    var target = e.target || e.srcElement,
      id = target.id,
      selectedText = this.selectedText,
      query = encodeURI(selectedText.replace(/\s/g, '+')),
      searchURI;

    if (id == 'selection-menu-google') {
      searchURI = 'http://www.google.com/search?ie=utf-8&q=';
    } else if (id == 'selection-menu-bing') {
      searchURI = 'http://www.bing.com/search?q=';
    }

    location.href = searchURI + query;
  }
});


CopyLink Usage:
---------------

Create an instance of SelectionMenu by calling “new CopyLink”.

Pass an object literal with the following options:
  container (DOM element):
    The element where the copy event is observed. Normally that's
    the main text container.
  handler (function, optional):
    A handler function which is called when the user copys some text.
    This function should return a string which is appended to the
    copied text.
    Defaults to '<br>Source: ' + location.href, e.g. “Source:” and the
    URL of the current document.
  minimalSelection (number, optional):
    Only append a source reference if the selected text has at least this length.
    Defaults to 20 characters.

Example:
--------

This observes copy events at the element with the ID “article”. It appends the
string “Source: <URL>” when the user copys text which is longer than 20 characters.

new CopyLink({
  container : document.getElementById('article'),
  handler : function () {
    return '<br>Source: ' + location.href;
  }
});