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628 lines
22 KiB
Python
628 lines
22 KiB
Python
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#!/usr/bin/env python3
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"""
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Kitty kitten: select a tab from a list with fuzzy search.
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Usage: map some_key kitten select_tab.py
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Keys:
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Up/Down, Page Up/Page Down - scroll list
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Enter - select highlighted tab
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Any other input - search box (incremental fuzzy filter)
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Ctrl+Up / Ctrl+Down - search history (previous/next)
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Ctrl+C / Escape - quit without selecting
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"""
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from __future__ import annotations
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# from kitty.typing_compat import KeyEventType
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from kitty.key_encoding import EventType
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from kitty.boss import Boss
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from kittens.tui.handler import Handler, kitten_ui
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from kittens.tui.loop import Loop, debug
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from kittens.tui.line_edit import LineEdit
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from kittens.tui.operations import styled
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import json
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import os
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import sys
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import pprint
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from typing import Any
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def format_cwd_like_zsh(path: str) -> str:
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"""Format CWD like zsh %(4~|…/%3~|%~): full path, or …/last/3/parts if 4+ segments."""
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if not path:
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return ""
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home = os.environ.get("HOME", "") or os.path.expanduser("~")
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if home and (path == home or path.startswith(home + "/")):
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path = "~" + path[len(home) :].rstrip("/") or ""
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path = path.rstrip("/") or "/"
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segments = [s for s in path.split("/") if s]
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if len(segments) >= 4:
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return "…/" + "/".join(segments[-3:])
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return path if path else "~"
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class TabRow:
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"""One row of data for a tab (for display and filtering)."""
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def __init__(
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self,
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tab_id,
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os_window_id,
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index_in_os_window,
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title,
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cwd,
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vt,
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foreground,
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search_text="",
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):
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self.tab_id = tab_id
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self.os_window_id = os_window_id
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self.index_in_os_window = index_in_os_window
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self.title = title
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self.cwd = cwd
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self.vt = vt
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self.foreground = foreground
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parts = [title, cwd]
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if vt is not None:
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parts.append(vt)
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parts.append(foreground)
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self.search_text = " ".join(parts).lower() if not search_text else search_text
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def fuzzy_match(query: str, text: str) -> bool:
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"""True if query characters appear in text in order (case-insensitive)."""
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if not query:
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return True
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q = query.lower()
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t = text.lower()
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i = 0
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for c in q:
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j = t.find(c, i)
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if j < 0:
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return False
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i = j + 1
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return True
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def get_fuzzy_match_indices(query: str, text: str) -> list[int]:
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"""Indices in text that match each query character in order (case-insensitive)."""
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if not query:
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return []
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q = query.lower()
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t = text.lower()
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indices = []
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i = 0
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for c in q:
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j = t.find(c, i)
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if j < 0:
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break
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indices.append(j)
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i = j + 1
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return indices
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def highlight_matches(
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segment_str: str,
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match_indices: list[int],
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content_len: int,
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) -> str:
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"""Wrap matching character runs in segment_str with styled bold cyan (or fallback SGR)."""
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in_content = {i for i in match_indices if 0 <= i < content_len}
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if not in_content:
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return segment_str
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# Merge consecutive indices into (start, end) runs
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sorted_i = sorted(in_content)
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runs = []
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start = sorted_i[0]
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end = start + 1
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for i in sorted_i[1:]:
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if i == end:
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end = i + 1
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else:
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runs.append((start, end))
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start, end = i, i + 1
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runs.append((start, end))
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# Build string with highlights
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out = []
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pos = 0
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hi_on = "\033[1;36m" # bold cyan
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hi_off = "\033[22;39m"
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for s, e in runs:
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out.append(segment_str[pos:s])
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chunk = segment_str[s:e]
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st = styled(chunk, fg="cyan", bold=True)
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out.append(st if st else hi_on + chunk + hi_off)
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pos = e
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out.append(segment_str[pos:])
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return "".join(out)
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def longest_substring_match_length(query: str, text: str) -> int:
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"""Length of longest contiguous substring of query that appears in text (case-insensitive)."""
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if not query:
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return 0
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q = query.lower()
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t = text.lower()
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best = 0
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for start in range(len(q)):
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for end in range(start + 1, len(q) + 1):
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if q[start:end] in t:
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best = max(best, end - start)
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return best
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def gather_tabs_from_ls(ls_data: list[dict[str, Any]]) -> list[TabRow]:
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"""Build a flat list of TabRow from kitten @ ls JSON (list of OS windows)."""
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rows: list[TabRow] = []
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# Exclude the tab that contains the window we're running in (the overlay's parent)
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try:
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self_window_id = int(os.environ.get("KITTY_WINDOW_ID", "") or 0)
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except (ValueError, TypeError):
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self_window_id = 0
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for os_win in ls_data:
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os_window_id = os_win.get("id", 0)
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tabs = os_win.get("tabs") or []
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for tab_idx, tab in enumerate(tabs):
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windows = tab.get("windows") or []
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if self_window_id and any(w.get("id") == self_window_id for w in windows):
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continue
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tab_id = tab.get("id", 0)
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title = tab.get("title") or ""
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# Use active/focused window in tab; fallback to first
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active = next(
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(w for w in windows if w.get("is_focused") or w.get("is_active")),
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windows[0] if windows else None,
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)
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cwd = ""
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vt = None
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foreground = ""
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if active:
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debug(f"Active window in tab {tab_id}: {active}")
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cwd = active.get("cwd") or ""
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user_vars = active.get("user_vars")
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if isinstance(user_vars, dict):
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vt = user_vars.get("vt")
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else:
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vt = None
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# Foreground process: cmdline or foreground_processes
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cmdline = active.get("cmdline")
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if cmdline:
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foreground = (
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" ".join(cmdline) if isinstance(cmdline, list) else str(cmdline)
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)
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else:
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fg_procs = active.get("foreground_processes")
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if fg_procs:
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parts = []
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for p in fg_procs:
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if isinstance(p, dict):
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pcmd = p.get("cmdline")
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if pcmd:
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parts.append(
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" ".join(pcmd)
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if isinstance(pcmd, list)
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else str(pcmd)
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)
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else:
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parts.append(str(p))
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foreground = " | ".join(parts)
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rows.append(
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TabRow(
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tab_id=tab_id,
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os_window_id=os_window_id,
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index_in_os_window=tab_idx,
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title=title or "(no title)",
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cwd=cwd,
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vt=vt,
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foreground=foreground or "(no process)",
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search_text="",
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)
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)
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return rows
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class TabSelectHandler(Handler):
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"""TUI handler: list of tabs, search box, scroll, history."""
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def __init__(self, tab_rows: list[TabRow]) -> None:
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super().__init__()
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self.all_rows = tab_rows
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self.filtered_rows = tab_rows[:]
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# self.search_history: list[str] = []
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# self.history_index = -1 # -1 = current (not in history)
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self.selected_index = 0 # index in filtered list
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self.scroll_offset = 0
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self.selected_tab_result: dict[str, Any] | None = None # set on Enter
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self.line_edit = LineEdit()
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# Minimum size so we always draw something (overlay PTY can report 0x0 at start)
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MIN_ROWS = 24
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MIN_COLS = 80
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@property
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def screen_rows(self) -> int:
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return max(self.MIN_ROWS, getattr(self.screen_size, "rows", 0) or 0)
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@property
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def screen_cols(self) -> int:
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return max(self.MIN_COLS, getattr(self.screen_size, "cols", 0) or 0)
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def initialize(self) -> None:
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# self.print(f"In TabSelectHandler...")
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self.cmd.clear_screen()
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self.cmd.set_cursor_visible(True)
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self._apply_filter()
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self._clamp_selection()
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# Draw immediately and also schedule a draw on next event-loop tick. When run
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# as an overlay, the PTY size can be 0x0 at first or kitty may only show
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# content sent after overlay_ready(); the delayed draw ensures something
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# appears once the overlay is ready.
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self._draw()
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try:
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self.asyncio_loop.call_soon(self._draw)
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except Exception:
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pass
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# self.write(SAVE_CURSOR)
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# debug("Initialization complete")
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def _apply_filter(self) -> None:
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# debug("In _apply_filter")
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q = self.line_edit.current_input.strip()
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if not q:
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self.filtered_rows = self.all_rows[:]
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else:
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q_lower = q.lower()
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# Exact VT match: if the search term equals a tab's VT, show only that/those.
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vt_exact = [
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r for r in self.all_rows if r.vt is not None and str(r.vt).strip() == q
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]
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if vt_exact:
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self.filtered_rows = vt_exact
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else:
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self.filtered_rows = [
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r for r in self.all_rows if fuzzy_match(q_lower, r.search_text)
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]
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# Sort by longest contiguous substring match (best first), then original order
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self.filtered_rows.sort(
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key=lambda r: (
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-longest_substring_match_length(q_lower, r.search_text),
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self.all_rows.index(r),
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)
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)
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self._clamp_selection()
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def on_resize(self, screen_size: Any) -> None:
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# debug(f"In on_resize with screen_size: {screen_size}")
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super().on_resize(screen_size)
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self._clamp_selection()
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self._draw()
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def _clamp_selection(self) -> None:
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# debug("In _clamp_selection")
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n = len(self.filtered_rows)
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if n == 0:
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self.selected_index = 0
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self.scroll_offset = 0
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return
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if self.selected_index >= n:
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self.selected_index = 0
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elif self.selected_index < 0:
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self.selected_index = n - 1
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# self.selected_index = max(0, min(self.selected_index, n - 1))
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# Keep selection in view
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list_top = 1
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list_bottom = self.screen_rows - 2
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list_height = list_bottom - list_top + 1
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if self.selected_index < self.scroll_offset:
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self.scroll_offset = self.selected_index
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elif self.selected_index >= self.scroll_offset + list_height:
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self.scroll_offset = self.selected_index - list_height + 1
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# def _push_search_to_history(self) -> None:
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# debug("In _push_search_to_history")
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# if self.search_query.strip() and (
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# not self.search_history
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# or self.search_history[-1] != self.search_query.strip()
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# ):
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# self.search_history.append(self.search_query.strip())
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# self.history_index = -1
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def _draw(self) -> None:
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# debug("In _draw")
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self.cmd.clear_screen()
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rows, cols = self.screen_rows, self.screen_cols
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list_top = 1
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list_bottom = rows - 2
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list_height = list_bottom - list_top + 1
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# debug(f"in draw: rows: {rows}, cols: {cols}")
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# Column widths (visible chars only). Four segments, three spaces between.
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w_vt = 2
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remaining = cols - w_vt - 3
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w_title = max(12, int(remaining * 0.45))
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w_foreground = max(10, int(remaining * 0.35))
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w_cwd = max(8, remaining - w_title - w_foreground)
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# Header: plain string of exactly cols visible characters, then style once
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header_plain = (
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"VT".ljust(w_vt)
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+ " "
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+ "Title".ljust(w_title)
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+ " "
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+ "Process".ljust(w_foreground)
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+ " "
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+ "CWD".ljust(w_cwd)
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)
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self.cmd.set_cursor_position(0, 0)
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self.write(styled(header_plain, bold=True) + "\r\n")
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# List
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q = self.line_edit.current_input.strip().lower()
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visible = self.filtered_rows[
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self.scroll_offset : self.scroll_offset + list_height
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]
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def segment_plain(content: str, width: int, add_dots: bool) -> tuple[str, int]:
|
||
|
|
"""Return (padded segment string, content_len for highlighting)."""
|
||
|
|
if len(content) > width:
|
||
|
|
if add_dots and width >= 2:
|
||
|
|
content = content[: width - 2] + ".."
|
||
|
|
else:
|
||
|
|
content = content[:width]
|
||
|
|
content_len = len(content)
|
||
|
|
return content.ljust(width), content_len
|
||
|
|
|
||
|
|
for i, row in enumerate(visible):
|
||
|
|
y = list_top + i
|
||
|
|
global_idx = self.scroll_offset + i
|
||
|
|
is_selected = global_idx == self.selected_index
|
||
|
|
|
||
|
|
# Build each segment as plain text with exact visible width (no SGR yet)
|
||
|
|
vt_plain, vt_content_len = segment_plain(
|
||
|
|
row.vt or "-", w_vt, add_dots=False
|
||
|
|
)
|
||
|
|
title_plain, title_content_len = segment_plain(
|
||
|
|
row.title, w_title, add_dots=True
|
||
|
|
)
|
||
|
|
fg_plain, fg_content_len = segment_plain(
|
||
|
|
row.foreground, w_foreground, add_dots=True
|
||
|
|
)
|
||
|
|
cwd_display = format_cwd_like_zsh(row.cwd)
|
||
|
|
cwd_plain, cwd_content_len = segment_plain(
|
||
|
|
cwd_display, w_cwd, add_dots=True
|
||
|
|
)
|
||
|
|
|
||
|
|
# Apply match highlighting (inserts SGR; visible length unchanged)
|
||
|
|
if q:
|
||
|
|
vt_styled = highlight_matches(
|
||
|
|
vt_plain,
|
||
|
|
get_fuzzy_match_indices(q, row.vt or ""),
|
||
|
|
vt_content_len,
|
||
|
|
)
|
||
|
|
title_styled = highlight_matches(
|
||
|
|
title_plain,
|
||
|
|
get_fuzzy_match_indices(q, row.title),
|
||
|
|
title_content_len,
|
||
|
|
)
|
||
|
|
fg_styled = highlight_matches(
|
||
|
|
fg_plain,
|
||
|
|
get_fuzzy_match_indices(q, row.foreground),
|
||
|
|
fg_content_len,
|
||
|
|
)
|
||
|
|
cwd_styled = highlight_matches(
|
||
|
|
cwd_plain,
|
||
|
|
get_fuzzy_match_indices(q, cwd_display),
|
||
|
|
cwd_content_len,
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
vt_styled = vt_plain
|
||
|
|
title_styled = title_plain
|
||
|
|
fg_styled = fg_plain
|
||
|
|
cwd_styled = cwd_plain
|
||
|
|
|
||
|
|
# Concatenate segments with single spaces; total visible length is fixed
|
||
|
|
line_plain = (
|
||
|
|
vt_styled + " " + title_styled + " " + fg_styled + " " + cwd_styled
|
||
|
|
)
|
||
|
|
|
||
|
|
# If selected, wrap entire line in reverse (no slicing of output)
|
||
|
|
if is_selected:
|
||
|
|
rev = styled(line_plain, reverse=True)
|
||
|
|
line_out = rev if rev else "\033[7m" + line_plain + "\033[27m"
|
||
|
|
else:
|
||
|
|
line_out = line_plain
|
||
|
|
|
||
|
|
self.cmd.set_cursor_position(0, y)
|
||
|
|
self.write(line_out)
|
||
|
|
self.cmd.clear_to_eol()
|
||
|
|
self.write("\r\n")
|
||
|
|
|
||
|
|
# Search line
|
||
|
|
self.cmd.set_cursor_position(0, rows - 1)
|
||
|
|
self.line_edit.write(
|
||
|
|
self.write, prompt="Filter: ", screen_cols=self.screen_size.cols
|
||
|
|
)
|
||
|
|
# prompt = "Filter: "
|
||
|
|
# self.write(prompt + self.search_query)
|
||
|
|
# self.cmd.clear_to_eol()
|
||
|
|
# self.cmd.set_cursor_position(len(prompt) + self.search_cursor, rows - 1)
|
||
|
|
# debug(
|
||
|
|
# "At end of draw, flushing, current_input: {self.line_edit.current_input}, cursor_pos: {self.line_edit.cursor_pos}"
|
||
|
|
# )
|
||
|
|
self.flush()
|
||
|
|
|
||
|
|
# def on_key_event(
|
||
|
|
# self, key_event: KeyEventType, in_bracketed_paste: bool = False
|
||
|
|
# ) -> None:
|
||
|
|
# debug(f"Got key event: {key_event}")
|
||
|
|
# if key_event.text:
|
||
|
|
# self._on_search_input(key_event.text)
|
||
|
|
# return
|
||
|
|
# if self.perform_default_key_action(key_event):
|
||
|
|
# return
|
||
|
|
# self.on_key(key_event)
|
||
|
|
#
|
||
|
|
def on_key(self, key_event) -> None:
|
||
|
|
# debug(f"In on_key with key_event: {key_event}")
|
||
|
|
if self.line_edit.on_key(key_event):
|
||
|
|
# debug(f"Handled by line_edit: {self.line_edit}")
|
||
|
|
self.selected_index = 0
|
||
|
|
self._clamp_selection()
|
||
|
|
self._apply_filter()
|
||
|
|
self._draw()
|
||
|
|
return
|
||
|
|
|
||
|
|
if key_event.type is EventType.RELEASE:
|
||
|
|
return
|
||
|
|
match key_event.key:
|
||
|
|
case "ESCAPE":
|
||
|
|
self.on_interrupt()
|
||
|
|
return
|
||
|
|
case "UP":
|
||
|
|
self.selected_index = self.selected_index - 1
|
||
|
|
self._clamp_selection()
|
||
|
|
self._draw()
|
||
|
|
return
|
||
|
|
case "DOWN":
|
||
|
|
self.selected_index = self.selected_index + 1
|
||
|
|
self._clamp_selection()
|
||
|
|
self._draw()
|
||
|
|
return
|
||
|
|
case "PAGE_UP":
|
||
|
|
list_height = self.screen_rows - 3
|
||
|
|
self.selected_index = max(0, self.selected_index - list_height)
|
||
|
|
self._clamp_selection()
|
||
|
|
self._draw()
|
||
|
|
return
|
||
|
|
case "PAGE_DOWN":
|
||
|
|
list_height = self.screen_rows - 3
|
||
|
|
self.selected_index = min(
|
||
|
|
len(self.filtered_rows) - 1, self.selected_index + list_height
|
||
|
|
)
|
||
|
|
self._clamp_selection()
|
||
|
|
self._draw()
|
||
|
|
return
|
||
|
|
case "ENTER":
|
||
|
|
self._select_current()
|
||
|
|
return
|
||
|
|
# if key_event.matches("ctrl+up"):
|
||
|
|
# self._history_prev()
|
||
|
|
# return
|
||
|
|
# if key_event.matches("ctrl+down"):
|
||
|
|
# self._history_next()
|
||
|
|
# return
|
||
|
|
# Line editing in search box
|
||
|
|
|
||
|
|
def on_text(self, text: str, in_bracketed_paste: bool = False) -> None:
|
||
|
|
# debug(f"In on_text with text: {text}, in_bracketed_paste: {in_bracketed_paste}")
|
||
|
|
self.line_edit.on_text(text, in_bracketed_paste)
|
||
|
|
# debug(
|
||
|
|
# f"After line_edit.on_text, current_input: {self.line_edit.current_input}, cursor_pos: {self.line_edit.cursor_pos}"
|
||
|
|
# )
|
||
|
|
self.selected_index = 0
|
||
|
|
self._clamp_selection()
|
||
|
|
self._apply_filter()
|
||
|
|
self._draw()
|
||
|
|
|
||
|
|
# def _history_prev(self) -> None:
|
||
|
|
# debug("In _history_prev")
|
||
|
|
# if not self.search_history:
|
||
|
|
# return
|
||
|
|
# if self.history_index <= 0:
|
||
|
|
# if self.search_query.strip():
|
||
|
|
# self.search_history.append(self.search_query.strip())
|
||
|
|
# self.history_index = len(self.search_history) - 1
|
||
|
|
# else:
|
||
|
|
# self.history_index -= 1
|
||
|
|
# self.search_query = self.search_history[self.history_index]
|
||
|
|
# self.search_cursor = len(self.search_query)
|
||
|
|
# self._apply_filter()
|
||
|
|
# self._draw()
|
||
|
|
#
|
||
|
|
# def _history_next(self) -> None:
|
||
|
|
# debug("In _history_next")
|
||
|
|
# if not self.search_history or self.history_index < 0:
|
||
|
|
# return
|
||
|
|
# self.history_index += 1
|
||
|
|
# if self.history_index >= len(self.search_history):
|
||
|
|
# self.history_index = -1
|
||
|
|
# self.search_query = ""
|
||
|
|
# else:
|
||
|
|
# self.search_query = self.search_history[self.history_index]
|
||
|
|
# self.search_cursor = len(self.search_query)
|
||
|
|
# self._apply_filter()
|
||
|
|
# self._draw()
|
||
|
|
#
|
||
|
|
def _select_current(self) -> None:
|
||
|
|
# debug("In _select_current")
|
||
|
|
if not self.filtered_rows:
|
||
|
|
return
|
||
|
|
row = self.filtered_rows[self.selected_index]
|
||
|
|
self.selected_tab_result = {
|
||
|
|
"tab_id": row.tab_id,
|
||
|
|
"os_window_id": row.os_window_id,
|
||
|
|
"index": row.index_in_os_window,
|
||
|
|
}
|
||
|
|
self.quit_loop(0)
|
||
|
|
|
||
|
|
def on_interrupt(self) -> None:
|
||
|
|
debug("In on_interrupt")
|
||
|
|
self.quit_loop(1)
|
||
|
|
|
||
|
|
on_eot = on_interrupt
|
||
|
|
|
||
|
|
|
||
|
|
@kitten_ui(allow_remote_control=True)
|
||
|
|
def main(args: list[str]) -> str:
|
||
|
|
debug("In select_tab.py main")
|
||
|
|
cp = main.remote_control(["ls"], capture_output=True)
|
||
|
|
if cp.returncode != 0:
|
||
|
|
debug(f"Remote control error {cp.returncode}: {cp.stderr}")
|
||
|
|
sys.stderr.buffer.write(cp.stderr or b"")
|
||
|
|
raise SystemExit(cp.returncode)
|
||
|
|
ls_data = json.loads(cp.stdout.decode())
|
||
|
|
tab_rows = gather_tabs_from_ls(ls_data)
|
||
|
|
if not tab_rows:
|
||
|
|
debug("No tab rows?")
|
||
|
|
raise SystemExit(1)
|
||
|
|
debug(f"Have tab rows {pprint.pformat(tab_rows)}")
|
||
|
|
handler = TabSelectHandler(tab_rows)
|
||
|
|
debug(f"Created handler: {handler}")
|
||
|
|
sys.stdout.flush()
|
||
|
|
loop = Loop()
|
||
|
|
loop.loop(handler)
|
||
|
|
debug(f"Loop exited, selected_tab_result: {handler.selected_tab_result}")
|
||
|
|
|
||
|
|
return json.dumps(handler.selected_tab_result)
|
||
|
|
|
||
|
|
|
||
|
|
# @result_handler(has_ready_notification=True)
|
||
|
|
def handle_result(
|
||
|
|
args: list[str],
|
||
|
|
input: str,
|
||
|
|
target_window_id: int,
|
||
|
|
boss: Boss,
|
||
|
|
) -> None:
|
||
|
|
data = json.loads(input) if input else None
|
||
|
|
print("In handle_result with data:", data)
|
||
|
|
if not data:
|
||
|
|
return
|
||
|
|
tab_id = data.get("tab_id")
|
||
|
|
os_window_id = data.get("os_window_id")
|
||
|
|
if tab_id is None:
|
||
|
|
return
|
||
|
|
# Use Boss API: match tab by id, focus its OS window if needed, then make it active
|
||
|
|
tabs = list(boss.match_tabs(f"id:{tab_id}"))
|
||
|
|
if not tabs:
|
||
|
|
return
|
||
|
|
tab = tabs[0]
|
||
|
|
# If the tab is in a different OS window, focus that window first
|
||
|
|
if os_window_id is not None and hasattr(boss, "focus_os_window"):
|
||
|
|
try:
|
||
|
|
boss.focus_os_window(os_window_id)
|
||
|
|
except Exception:
|
||
|
|
pass
|
||
|
|
tab.make_active()
|