Membangunkan sambungan ulauncher dengan pangkalan data arahan

Pada hujung minggu, saya mengambil projek melalui Reddit yang melibatkan pemalam untuk Flow Launcher. Saya mencipta versi fzf dan rofi untuk persekitaran Linux Ubuntu saya, dan kemudian berfikir, betapa sukarnya untuk memindahkannya ke uLauncher?

Di sini saya mendokumentasikan perkara yang saya lakukan.

1. Di dalam ~/.local/share/ulauncher/extensions/

buat dir baharu. Dalam kes saya, saya mencipta ~/.local/share/ulauncher/extensions/com.github.ubuntupunk.ulauncher-vim

2. Sentuh fail berikut:

├── images
│   └── icon.png
├── versions.json
├── manifest.json
└── main.py

3. Dalam versions.json letakkan boilerplate berikut:

[
  {"required_api_version": "2", "commit": "master"}
]

4. Dalam manifest.json

{
  "required_api_version": "2",
  "name": "Demo extension",
  "description": "Extension Description",
  "developer_name": "John Doe",
  "icon": "images/icon.png",
  "options": {
    "query_debounce": 0.1
  },
  "preferences": [
    {
      "id": "demo_kw",
      "type": "keyword",
      "name": "Demo",
      "description": "Demo extension",
      "default_value": "dm"
    }
  ]
}

5. Dalam main.py

from ulauncher.api.client.Extension import Extension
from ulauncher.api.client.EventListener import EventListener
from ulauncher.api.shared.event import KeywordQueryEvent, ItemEnterEvent
from ulauncher.api.shared.item.ExtensionResultItem import ExtensionResultItem
from ulauncher.api.shared.action.RenderResultListAction import RenderResultListAction
from ulauncher.api.shared.action.HideWindowAction import HideWindowAction


class DemoExtension(Extension):

    def __init__(self):
        super().__init__()
        self.subscribe(KeywordQueryEvent, KeywordQueryEventListener())


class KeywordQueryEventListener(EventListener):

    def on_event(self, event, extension):
        items = []
        for i in range(5):
            items.append(ExtensionResultItem(icon='images/icon.png',
                                             name='Item %s' % i,
                                             description='Item description %s' % i,
                                             on_enter=HideWindowAction()))

        return RenderResultListAction(items)

if __name__ == '__main__':
    DemoExtension().run()

6. Sekarang edit manifest.json

{
  "required_api_version": "2",
  "name": "Vim Prompter",
  "description": "Vim cheatsheet helper",
  "developer_name": "David Robert Lewis",
  "icon": "images/icon.png",
  "options": {
    "query_debounce": 0.1
  },
  "preferences": [
    {
      "id": "vm_kw",
      "type": "keyword",
      "name": "Vim",
      "description": "Search for Vim commands",
      "default_value": "vm"
    }
  ]

7. Tambahkan fungsi pemuatan arahan ke main.py

class VmExtension(Extension):
    def load_vim_commands(self):
        """Load Vim commands from JSON file."""
        package_dir = os.path.dirname(os.path.abspath(__file__))
        full_path = os.path.join(package_dir, 'db', 'commands.json')   
        with open(full_path, 'r') as file:
            return json.load(file)

    def __init__(self):
        super().__init__()
        self.vim_commands = self.load_vim_commands()
        self.subscribe(KeywordQueryEvent, KeywordQueryEventListener())

8. Cipta folder db dengan yang berikut:

commands.json

contoh struktur:

{
  "categories": {
    "navigation": {
      "name": "Navigation",
      "patterns": [
        "scroll",
        "jump",
        "goto",
        "position"
      ],
      "subcategories": {
        "cursor": {
          "name": "Cursor Movement",
          "patterns": [
            "move[s]? cursor",
            "^[hjkl]$",
            "^[HJKL]$",
            "^[wWeEbB]$"
          ]
        },

Anda boleh melihat keseluruhan commands.json di sini.

9. Ubah suai KeywordQueryEventListener untuk melaksanakan fungsi carian.

class KeywordQueryEventListener(EventListener):
    def on_event(self, event, extension):
        query = event.get_argument() or ""
        items = []

        # If no query, show all commands (limited to first 8)
        commands_to_show = extension.vim_commands

        # If there's a query, filter commands
        if query:
            commands_to_show = [
                cmd for cmd in extension.vim_commands
                if query.lower() in cmd['command'].lower() or 
                   query.lower() in cmd['description'].lower()
            ]

        # Limit results to first 8 matches
        for cmd in commands_to_show[:8]:
            items.append(ExtensionResultItem(
                icon='images/icon.png',
                name=cmd['command'],
                description=f"{cmd['name']} - {cmd['description']}",
                on_enter=HideWindowAction()
            ))

        return RenderResultListAction(items)

10. Tambah fungsi pembukaan URL. Kami perlu mengimport penyemak imbas web dan mengubah suai tindakan on_enter untuk membuka URL arahan Vim

from ulauncher.api.shared.action.OpenUrlAction import OpenUrlAction

class KeywordQueryEventListener(EventListener):
    def on_event(self, event, extension):
        query = event.get_argument() or ""
        items = []

        commands_to_show = extension.vim_commands

        if query:
            commands_to_show = [
                cmd for cmd in extension.vim_commands
                if query.lower() in cmd['command'].lower() or 
                   query.lower() in cmd['description'].lower()
            ]

        for cmd in commands_to_show[:8]:
            url = f"https://vim.rtorr.com/#:~:text={cmd['rtorr_description']}"
            items.append(ExtensionResultItem(
                icon='images/icon.png',
                name=cmd['command'],
                description=f"{cmd['name']} - {cmd['description']}",
                on_enter=OpenUrlAction(url)
            ))

        return RenderResultListAction(items)

11. Perubahan utama ialah:

• Menambah import OpenUrlAction
• Menggantikan HideWindowAction dengan OpenUrlAction
• Membina URL menggunakan rtirr_description arahan

12. Kod projek penuh boleh dilihat di sini:

ulauncher-vim repo

dan sambungan ulauncher di sini

Rujukan

1. https://dev.to/brpaz/an-introduction-to-ulauncher-extension-development-1m69
2. https://ext.ulauncher.io/-/github-ubuntupunk-ulauncher-vim

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