raven wrote:While beeing in that editor (on the Actions tab) I can see several "standard actions" available like "Save" and "Save as" etc.
Now I wonder why is there no "Open File" action available?
"Open File" is not a standard action. It is contributed by the Eclispse Editors
plugin rather than the Workbench
class (where all of the standard actions come from).
You would need to add the org.eclipse.editors.ui
plugin to your plugin's dependency list and then add it to your action list manually using the Add existing action