/
autocomplete.py
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/
autocomplete.py
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import tkinter as tk
from thonny.globals import get_workbench, get_runner
from thonny.codeview import CodeViewText
from thonny.shell import ShellText
from thonny.common import InlineCommand
from tkinter import messagebox
# TODO: adjust the window position in cases where it's too close to bottom or right edge - but make sure the current line is shown
"""Completions get computed on the backend, therefore getting the completions is
asynchronous.
"""
class Completer(tk.Listbox):
def __init__(self, text):
self.font = get_workbench().get_font("EditorFont").copy()
tk.Listbox.__init__(self, master=text,
font=self.font,
activestyle="dotbox",
exportselection=False)
self.text = text
self.completions = []
self.doc_label = tk.Label(master=text, text="Aaappiiiii", bg="#ffffe0",
justify="left", anchor="nw")
# Auto indenter will eat up returns, therefore I need to raise the priority
# of this binding
self.text_priority_bindtag = "completable" + str(self.text.winfo_id())
self.text.bindtags((self.text_priority_bindtag,) + self.text.bindtags())
self.text.bind_class(self.text_priority_bindtag, "<Key>", self._on_text_keypress, True)
self.text.bind("<<TextChange>>", self._on_text_change, True) # Assuming TweakableText
# for cases when Listbox gets focus
self.bind("<Escape>", self._close)
self.bind("<Return>", self._insert_current_selection)
self.bind("<Double-Button-1>", self._insert_current_selection)
self._bind_result_event()
def _bind_result_event(self):
# TODO: remove binding when editor gets closed
get_workbench().bind("EditorCompletions", self._handle_backend_response, True)
def handle_autocomplete_request(self):
row, column = self._get_position()
source = self.text.get("1.0", "end-1c")
get_runner().send_command(InlineCommand(command="editor_autocomplete",
source=source,
row=row,
column=column,
filename=self._get_filename()))
def _handle_backend_response(self, msg):
row, column = self._get_position()
source = self.text.get("1.0", "end-1c")
if msg.source != source or msg.row != row or msg.column != column:
# situation has changed, information is obsolete
self._close()
elif msg.error:
self._close()
messagebox.showerror("Autocomplete error", msg.error)
else:
self._present_completions(msg.completions)
def _present_completions(self, completions):
self.completions = completions
# broadcast logging info
row, column = self._get_position()
get_workbench().event_generate("AutocompleteProposal",
text_widget=self.text,
row=row,
column=column,
proposal_count=len(completions))
# present
if len(completions) == 0:
self._close()
elif len(completions) == 1:
self._insert_completion(completions[0]) #insert the only completion
self._close()
else:
self._show_box(completions)
def _show_box(self, completions):
self.delete(0, self.size())
self.insert(0, *[c["name"] for c in completions])
self.activate(0)
self.selection_set(0)
# place box
if not self._is_visible():
self.font.configure(size=get_workbench().get_font("EditorFont")["size"]-2)
#_, _, _, list_box_height = self.bbox(0)
height = 100 #min(150, list_box_height * len(completions) * 1.15)
typed_name_length = len(completions[0]["name"]) - len(completions[0]["complete"])
text_box_x, text_box_y, _, text_box_height = self.text.bbox('insert-%dc' % typed_name_length);
# should the box appear below or above cursor?
space_below = self.master.winfo_height() - text_box_y - text_box_height
space_above = text_box_y
if space_below >= height or space_below > space_above:
height = min(height, space_below)
y = text_box_y + text_box_height
else:
height = min(height, space_above)
y = text_box_y - height
width = 400
self.place(x=text_box_x, y=y, width=width, height=height)
self._update_doc()
def _update_doc(self):
c = self._get_selected_completion()
if c is None:
self.doc_label["text"] = ""
self.doc_label.place_forget()
else:
docstring = c.get("docstring", None)
if docstring:
self.doc_label["text"] = docstring
self.doc_label.place(x=self.winfo_x() + self.winfo_width(),
y=self.winfo_y(),
width=400,
height=self.winfo_height())
else:
self.doc_label["text"] = ""
self.doc_label.place_forget()
def _is_visible(self):
return self.winfo_ismapped()
def _insert_completion(self, completion):
typed_len = len(completion["name"]) - len(completion["complete"])
typed_prefix = self.text.get("insert-{}c".format(typed_len), "insert")
get_workbench().event_generate("AutocompleteInsertion",
text_widget=self.text,
typed_prefix=typed_prefix,
completed_name=completion["name"])
if self._is_visible():
self._close()
if not completion["name"].startswith(typed_prefix):
# eg. case of the prefix was not correct
self.text.delete("insert-{}c".format(typed_len), "insert")
self.text.insert('insert', completion["name"])
else:
self.text.insert('insert', completion["complete"])
def _get_filename(self):
# TODO: allow completing in shell
if not isinstance(self.text, CodeViewText):
return None
codeview = self.text.master
editor = get_workbench().get_editor_notebook().get_current_editor()
if editor.get_code_view() is codeview:
return editor.get_filename()
else:
return None
def _move_selection(self, delta):
selected = self.curselection()
if len(selected) == 0:
index = 0
else:
index = selected[0]
index += delta
index = max(0, min(self.size()-1, index))
self.selection_clear(0, self.size()-1)
self.selection_set(index)
self.activate(index)
self.see(index)
self._update_doc()
def _get_request_id(self):
return "autocomplete_" + str(self.text.winfo_id())
def _get_position(self):
return map(int, self.text.index("insert").split("."))
def _on_text_keypress(self, event=None):
if not self._is_visible():
return
if event.keysym == "Escape":
self._close()
return "break"
elif event.keysym in ["Up", "KP_Up"]:
self._move_selection(-1)
return "break"
elif event.keysym in ["Down", "KP_Down"]:
self._move_selection(1)
return "break"
elif event.keysym in ["Return", "KP_Enter"]:
assert self.size() > 0
self._insert_current_selection()
return "break"
def _insert_current_selection(self, event=None):
self._insert_completion(self._get_selected_completion())
def _get_selected_completion(self):
sel = self.curselection()
if len(sel) != 1:
return None
return self.completions[sel[0]]
def _on_text_change(self, event=None):
if self._is_visible():
self.handle_autocomplete_request()
def _close(self, event=None):
self.place_forget()
self.doc_label.place_forget()
self.text.focus_set()
def on_text_click(self, event=None):
if self._is_visible():
self._close()
class ShellCompleter(Completer):
def _bind_result_event(self):
# TODO: remove binding when editor gets closed
get_workbench().bind("ShellCompletions", self._handle_backend_response, True)
def handle_autocomplete_request(self):
source=self._get_prefix()
get_runner().send_command(InlineCommand(command="shell_autocomplete",
source=source))
def _handle_backend_response(self, msg):
# check if the response is relevant for current state
if msg.source != self._get_prefix():
self._close()
else:
self._present_completions(msg.completions)
def _get_prefix(self):
return self.text.get("insert linestart", "insert") # TODO: allow multiple line input
def handle_autocomplete_request(event=None):
if event is None:
text = get_workbench().focus_get()
else:
text = event.widget
_handle_autocomplete_request_for_text(text)
def _handle_autocomplete_request_for_text(text):
if not hasattr(text, "autocompleter"):
if isinstance(text, (CodeViewText, ShellText)):
if isinstance(text, CodeViewText):
text.autocompleter = Completer(text)
elif isinstance(text, ShellText):
text.autocompleter = ShellCompleter(text)
text.bind("<1>", text.autocompleter.on_text_click)
else:
return
text.autocompleter.handle_autocomplete_request()
def patched_perform_midline_tab(text, event):
if isinstance(text, ShellText):
option_name = "edit.tab_complete_in_shell"
else:
option_name = "edit.tab_complete_in_editor"
if get_workbench().get_option(option_name):
if not text.has_selection():
_handle_autocomplete_request_for_text(text)
return "break"
else:
return text.perform_smart_tab(event)
def load_plugin():
get_workbench().add_command("autocomplete", "edit", "Auto-complete",
handle_autocomplete_request,
default_sequence="<Control-space>"
# TODO: tester
)
get_workbench().set_default("edit.tab_complete_in_editor", True)
get_workbench().set_default("edit.tab_complete_in_shell", True)
CodeViewText.perform_midline_tab = patched_perform_midline_tab
ShellText.perform_midline_tab = patched_perform_midline_tab