A simply SublimeText plugin to run a command if matches a selector

mousemap_wrapper.py

"""
A simply SublimeText plugin to run a command if matches a selector.

Usage example - my `Default (OSX).sublime-mousemap`:
[
    // for Python we use Anaconda's goto command, for go we use go_guru,
    // for others we use built-in goto command
    { "button": "button1", "modifiers": ["ctrl"], "command": "mousemap_wrap",
      "press_command": "drag_select", "args": { "commands": [
        {
            "command": "anaconda_goto",
            "run_for_selector": "source.python"
        },
        {
            "run_for_selector": "source.go",
            "command": "go_guru",
            "args": {
                "mode": "definition",
                "output": false
            },
        },
        {
            "command": "goto_definition",
        }
    ] } }
]
"""
import sublime_plugin


class MousemapWrapCommand(sublime_plugin.TextCommand):
    def run(self, edit, commands, *args, **kwargs):
        sel = self.view.sel()
        (row, col) = self.view.rowcol(sel[0].begin())
        point = self.view.text_point(row, col)

        best_match = None
        for command in commands:
            if 'run_for_selector' in command:
                if self.view.scope_name(point).startswith(
                    command['run_for_selector']
                ):
                    best_match = command
            elif not best_match:
                best_match = command

        if not best_match:
            raise Exception('No match found')

        self.view.window().run_command(
            best_match['command'],
            args=best_match.get('args'),
        )