How to make basic code autocompletion?

Question

Hello :)

I'm making simple code editor in GTK and gtksourceview2.0. I would like to add to my editor a code completion window. There should be 10-15 keywords (always the same).

Can anyone could give me url for some tutorials or describe usage of gtk_source_completion_XXX functions?

Answer 1

What you need is to parse the user input by the key-press-event signal (or similar signals).

• Get the GtkTextBuffer by calling gtk_text_view_get_buffer.
• Get the GtkTextMark by calling gtk_text_buffer_get_insert.
• Get the GtkTextIter by calling gtk_text_buffer_get_iter_at_mark.
• Check if the GtkTextIter is at the end of the word by gtk_text_iter_ends_word.
• If it was
  • then Use gtk_text_iter_backward_word_start to get the GtkTextIter for the start of the word.
  • Call gtk_text_buffer_get_text to get the uncompleted word.
  • Search for related identifiers and display them in a GtkTreeView on a GtkWindow of GTK_WINDOW_POPUP type.

If you want to show the auto-complete list after . or :: or ->, then you should get the previous word by an approach like the above.