I am using Maven for dependency management. With some libraries, I find myself attaching and browsing the sources, especially when the Javadoc comments are not very thorough. This is great for jumping from my project code to a library's source, but once I get to there, it becomes difficult to navigate the library's source.

Navigate -> Go To Source works great, but Navigate -> Go To Implementation, Find Usages, and even a simple Find (e.g., right-click on the Dependency package and click Find...) do not work.

It would be immensely helpful if there was a way to use this functionality while browsing library source. I understand that searching all jars would negatively impact performance if it occurred all the time, but it would be nice to have (even if it's slow) specifically when initiating such a search from within a library's sources.