mirror of
https://github.com/bec-project/bec_widgets.git
synced 2025-07-13 19:21:50 +02:00
feat(console): add "prompt" signal to inform when shell is at prompt
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@ -10,9 +10,11 @@ import fcntl
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import html
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import os
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import pty
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import re
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import sys
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import pyte
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from pygments.token import Token
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from pyte.screens import History
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from qtpy import QtCore, QtGui, QtWidgets
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from qtpy.QtCore import Property as pyqtProperty
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@ -235,10 +237,14 @@ class BECConsole(QtWidgets.QWidget):
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PLUGIN = True
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ICON_NAME = "terminal"
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prompt = pyqtSignal(bool)
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def __init__(self, parent=None, cols=132):
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super().__init__(parent)
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self.term = _TerminalWidget(self, cols, rows=43)
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self.term.prompt.connect(self.prompt) # forward signal from term to this widget
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self.scroll_bar = QScrollBar(Qt.Vertical, self)
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# self.scroll_bar.hide()
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layout = QHBoxLayout(self)
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@ -320,9 +326,32 @@ class BECConsole(QtWidgets.QWidget):
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def start(self, deactivate_ctrl_d=True):
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self.term.start(deactivate_ctrl_d=deactivate_ctrl_d)
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def push(self, text):
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def push(self, text, hit_return=False):
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"""Push some text to the terminal"""
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return self.term.push(text)
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return self.term.push(text, hit_return=hit_return)
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def execute_command(self, command):
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self.push(command, hit_return=True)
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def set_prompt_tokens(self, *tokens):
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"""Prepare regexp to identify prompt, based on tokens
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Tokens are returned from get_ipython().prompts.in_prompt_tokens()
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"""
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regex_parts = []
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for token_type, token_value in tokens:
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if token_type == Token.PromptNum: # Handle dynamic prompt number
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regex_parts.append(r"[\d\?]+") # Match one or more digits or '?'
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else:
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# Escape other prompt parts (e.g., "In [", "]: ")
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if not token_value:
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regex_parts.append(".+?") # arbitrary string
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else:
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regex_parts.append(re.escape(token_value))
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# Combine into a single regex
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prompt_pattern = "".join(regex_parts)
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self.term._prompt_re = re.compile(prompt_pattern + r"\s*$")
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cols = pyqtProperty(int, get_cols, set_cols)
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rows = pyqtProperty(int, get_rows, set_rows)
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@ -336,7 +365,13 @@ class _TerminalWidget(QtWidgets.QPlainTextEdit):
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Start ``Backend`` process and render Pyte output as text.
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"""
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prompt = pyqtSignal(bool)
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def __init__(self, parent, cols=125, rows=50, **kwargs):
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# regexp to match prompt
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self._prompt_re = None
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# last prompt
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self._prompt_str = None
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# file descriptor to communicate with the subprocess
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self.fd = None
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self.backend = None
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@ -540,11 +575,13 @@ class _TerminalWidget(QtWidgets.QPlainTextEdit):
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elif code is not None:
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self.write(code)
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def push(self, text):
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def push(self, text, hit_return=False):
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"""
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Write 'text' to terminal
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"""
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self.write(text.encode("utf-8"))
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if hit_return:
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self.write(b"\n")
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def contextMenuEvent(self, event):
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if self.fd is None:
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@ -650,6 +687,20 @@ class _TerminalWidget(QtWidgets.QPlainTextEdit):
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self.output[line_no] = line
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# fill the text area with HTML contents in one go
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self.appendHtml(f"<pre>{chr(10).join(self.output)}</pre>")
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if self._prompt_re is not None:
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text_buf = self.toPlainText()
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prompt = self._prompt_re.search(text_buf)
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if prompt is None:
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if self._prompt_str:
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self.prompt.emit(False)
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self._prompt_str = None
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else:
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prompt_str = prompt.string.rstrip()
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if prompt_str != self._prompt_str:
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self._prompt_str = prompt_str
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self.prompt.emit(True)
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# did updates, all clean
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screen.dirty.clear()
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@ -728,6 +779,24 @@ if __name__ == "__main__":
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console = BECConsole(mainwin)
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mainwin.setCentralWidget(console)
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def check_prompt(at_prompt):
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if at_prompt:
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print("NEW PROMPT")
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else:
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print("EXECUTING SOMETHING...")
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console.set_prompt_tokens(
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(Token.OutPromptNum, "•"),
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(Token.Prompt, ""), # will match arbitrary string,
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(Token.Prompt, " ["),
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(Token.PromptNum, "3"),
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(Token.Prompt, "/"),
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(Token.PromptNum, "1"),
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(Token.Prompt, "] "),
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(Token.Prompt, "❯❯"),
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)
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console.prompt.connect(check_prompt)
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console.start()
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# Show widget and launch Qt's event loop.
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