mrob95 / breathe

High-level API for creating dragonfly grammars

Breathe

A convenient API for creating dragonfly grammars with automatic CCR (continuous command recognition).

• Very quick start-up
• Command activity can be controlled either using dragonfly contexts or using "enable" and "disable" commands.
• All commands which match the current context may be chained together in any order in the same utterance.

Installation

pip install dfly-breathe

Instructions

• If you are creating a command set from scratch, start by cloning the Breathe skeleton project, which will give you a file structure to start with.

Adding commands

from dragonfly import *
from breathe import Breathe, CommandContext

Breathe.add_commands(
    # Commands will be active either when we are editing a python file
    # or after we say "enable python". pass None for the commands to be global.
    context = AppContext(title=".py") | CommandContext("python"),
    mapping = {
        "for each"              : Text("for  in :") + Key("left:5"),
        "for loop"              : Text("for i in range():") + Key("left:2"),
        "from import"           : Text("from  import ") + Key("home, right:5"),
        "function"              : Text("def ():") + Key("left:3"),
        "(iffae | iffy)"        : Text("if :") + Key("left"),
        "iffae not"             : Text("if not :") + Key("left"),
        "import"                : Text("import "),
        "lambda"                : Text("lambda :") + Key("left"),
        "while loop"            : Text("while :") + Key("left"),
        "shell iffae"           : Text("elif :") + Key("left"),
        "shells"                : Text("else:"),
        "return"                : Text("return "),
        # ------------------------------------------------
        "method <snaketext>"    : Text("def %(snaketext)s(self):") + Key("left:2"),
        "function [<snaketext>]": Text("def %(snaketext)s():") + Key("left:2"),
        "selfie [<snaketext>]"  : Text("self.%(snaketext)s"),
        "pointer [<snaketext>]" : Text(".%(snaketext)s"),
        "classy [<classtext>]"  : Text("class %(classtext)s:") + Key("left"),
    },
    extras = [
        Dictation("snaketext", default="").lower().replace(" ", "_"),
        Dictation("classtext", default="").title().replace(" ", ""),
    ]
)

For full details of the available contexts, actions and extras you can use, see the dragonfly documentation.

Loading command files

Breathe provides the command "rebuild everything" for reloading all of your commands, allowing you to modify commands without restarting the engine. In order for this to work, your command files need to be loaded by giving your directory structure to Breathe.load_modules().

For example, given a directory set up like this:

|   _main.py
|   __init__.py
+---my_commands
|   |   __init__.py
|   +---apps
|   |       chrome.py
|   |       notepad.py
|   |       __init__.py
|   +---core
|   |       alphabet.py
|   |       keys.py
|   |       __init__.py
|   +---language
|   |       c.py
|   |       python.py
|   |       __init__.py

Inside _main.py, the file which will be loaded by the engine, we load all of our command files by passing a dictionary with keys representing folder names and values being either a single module to import, a list of modules to import, or another dictionary. Like so:

from breathe import Breathe

Breathe.load_modules(
    {
        "my_commands": {
            "apps": ["chrome", "notepad"],
            "language": ["python", "c"],
            "core": ["keys", "alphabet"],
        }
    }
)

Given this setup, calling the "rebuild everything" command will reload all of your command files, making any changes available.

Custom top level commands

Advanced feature, if you are just getting started you should ignore this.

Top level commands allow you to embed sequences of breathe CCR commands inside other commands. This gives finer control over the way in which commands are recognised and executed.

Top level commands should be added in a separate add_commands call with the top_level option set to True. A couple of new elements - Exec and CommandsRef - are required to control them.

For example in the following, the first command implements "greedy" dictation by creating a top level command which recognises between zero and twelve of the commands which are active in the current context, followed by a dictation command which will consume the rest of the utterance. The second allows an arbitrary sequence of commands to be repeated a given number of times.

from dragonfly import *
from breathe import Breathe, CommandsRef, Exec

Breathe.add_commands(
    None,
    {
        "[<sequence_of_commands>] dictate <text>":
            Exec("sequence_of_commands") + Text("%(text)s"),
        "<sequence_of_commands> and repeat that <n> times":
            Exec("sequence_of_commands") * Repeat("n"),
    },
    [
        Dictation("text"),
        IntegerRef("n", 1, 100),
        CommandsRef("sequence_of_commands", 12)
    ],
    top_level=True
)

Examples

• My commands
• Mathfly