[GitHub] BigBlueHat opened a new issue #47: Interleaving selections within the DOM

[GitBox <gi...@apache.org>]

BigBlueHat opened a new issue #47: Interleaving selections within the DOM
URL: https://github.com/apache/incubator-annotator/issues/47
 
 
   Finding selections within the DOM and even wrapping them in an element is easy enough, and most developers just "roll their own" highlighter/selector for things like that--hence, they don't "shop" for tools like Apache Annotator for that.
   
   However, juggling interleaved selections in the DOM is tricky and not standardized.
   
   The DOM is a tree. Selections point at regions all over that tree, often intermixed.
   
   We should build tooling to handle that interleaving to manage the display, removal, eventing, etc, for such selections.
   
   See also #45 and #22.
   
   Example:
   ```html
   <div>
   <mark id="a1">Call me <mark id="a2">Ishmael</mark></mark>. Some years ago—never mind how long precisely—<mark id="a3">having little or <mark id="a4">no money in my purse</mark></mark><mark id="a4">, and nothing particular to interest me on shore</mark>, I thought I would sail about a little and see the watery part of the world.
   </div>
   ```
   * a2 is within a1 and so will have eventing and display related trickiness
   * a4 is made up of 2 marks, but is currently invalid as they share an `id`--which conceptually "relates" them as a unit, but the DOM doesn't work that way.
     * both sets of `<mark/>` elements would need shared events, display, removal, etc.
   * a3 also includes 1 part of a4, but not all of it, so weird eventing and display issues again
   
   Solving this (or even just exploring it) *is* something developers know they need, so likely it should be near the top of our list to solve. 😄 

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