Ask to save the file before closing the tab

[vyshnav-vinod]

Feature

Describe the feature, can also add images

When the user closes the tab, it would be helpful if biscuit asked to save the file. It would be also good to maybe find a way to show if a file has been saved or not. Like in VScode, if the file is not saved, there will be a white circle instead of the close sign in the tab.

[vyshnav-vinod]

Ok i tried working on this, but cant quite figure out how to check if the file contents have been changed or not ( So we can show the save dialog). @billyeatcookies

[tomlin7]

@vyshnav-vinod thanks for working on the issue!

I think a good approach would be to calculate the initial hash of file when it was opened and then store it, then on next save/close, recalculate hash for content in editor and try to match it with initial.

def calculate_hash(self):
    content = self.get("1.0", "end-1c")
    return hashlib.md5(content.encode()).hexdigest()

If the hashes are equal, that means there are no changes. Otherwise if they mismatch, show the dialog. And if the user accepts on saving, then we can set initial hash to be the newly calculated one.

Comparing the giant strings is the only way i see here. And using hashlib it could be slightly better mayhaps.

Try to make a function on GUIManager level too that is bound to whole app destroyed event.

self.protocol("WM_DELETE_WINDOW", self.on_close)

And trigger the editor level function to show dialog (only if editor.content and editor.content.editable).