Symbols Counter Plugin

Functionality:

• Plugin add a custom tool window to the IDEA ui. It is located in the bottom right corner with title "Project Symbols".
• Plugin scans the source code and outputs tree-like structure of the Java files in the project with all classes and methods in those files.
• Plugin tracks changes via listening to the virtual filesystem, meaning:
  • Deleting and creating files will automatically update the tool window content.
  • Editing existing file will be propagated upon explicit saving of file: Ctrl/Cmd + S shortcut.

For the project on the 1st picture plugin will generate an output as shown on the 2nd one. Blue icon shows the number of classes per file, the red one — the number of methods per file/class.

Implementation details:

• The plugin uses MVC structure:
  • Model: JavaSymbolsProvider (retrieves java files and their symbols via visiting PSI elements).
  • View: ProjectSymbolsToolWindowFactory (contains the tool window), SymbolsTreeCellRenderer (contains the rendering logic for the tree-like structure that shows project symbols).
  • Controller: SymbolsToolWindowController (manages updating of the tree, creates tree nodes and tree representation in memory, updates the ui after the tree was recalculated).

Building and running:

• Project uses gradle, so it should be enough to open it in Intellij IDEA, and it will automatically setup everything.
• In order to run an IDEA instance with the plugin integrated in it, run gradle runIde.
• To run tests use gradle test.