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222 lines
7.3 KiB
222 lines
7.3 KiB
3 years ago
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"""Grep dialog for Find in Files functionality.
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Inherits from SearchDialogBase for GUI and uses searchengine
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to prepare search pattern.
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"""
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import fnmatch
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import os
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import sys
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from tkinter import StringVar, BooleanVar
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from tkinter.ttk import Checkbutton # Frame imported in ...Base
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from idlelib.searchbase import SearchDialogBase
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from idlelib import searchengine
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# Importing OutputWindow here fails due to import loop
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# EditorWindow -> GrepDialog -> OutputWindow -> EditorWindow
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def grep(text, io=None, flist=None):
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"""Open the Find in Files dialog.
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Module-level function to access the singleton GrepDialog
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instance and open the dialog. If text is selected, it is
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used as the search phrase; otherwise, the previous entry
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is used.
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Args:
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text: Text widget that contains the selected text for
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default search phrase.
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io: iomenu.IOBinding instance with default path to search.
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flist: filelist.FileList instance for OutputWindow parent.
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"""
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root = text._root()
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engine = searchengine.get(root)
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if not hasattr(engine, "_grepdialog"):
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engine._grepdialog = GrepDialog(root, engine, flist)
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dialog = engine._grepdialog
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searchphrase = text.get("sel.first", "sel.last")
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dialog.open(text, searchphrase, io)
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def walk_error(msg):
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"Handle os.walk error."
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print(msg)
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def findfiles(folder, pattern, recursive):
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"""Generate file names in dir that match pattern.
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Args:
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folder: Root directory to search.
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pattern: File pattern to match.
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recursive: True to include subdirectories.
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"""
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for dirpath, _, filenames in os.walk(folder, onerror=walk_error):
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yield from (os.path.join(dirpath, name)
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for name in filenames
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if fnmatch.fnmatch(name, pattern))
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if not recursive:
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break
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class GrepDialog(SearchDialogBase):
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"Dialog for searching multiple files."
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title = "Find in Files Dialog"
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icon = "Grep"
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needwrapbutton = 0
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def __init__(self, root, engine, flist):
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"""Create search dialog for searching for a phrase in the file system.
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Uses SearchDialogBase as the basis for the GUI and a
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searchengine instance to prepare the search.
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Attributes:
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flist: filelist.Filelist instance for OutputWindow parent.
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globvar: String value of Entry widget for path to search.
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globent: Entry widget for globvar. Created in
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create_entries().
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recvar: Boolean value of Checkbutton widget for
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traversing through subdirectories.
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"""
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super().__init__(root, engine)
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self.flist = flist
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self.globvar = StringVar(root)
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self.recvar = BooleanVar(root)
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def open(self, text, searchphrase, io=None):
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"""Make dialog visible on top of others and ready to use.
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Extend the SearchDialogBase open() to set the initial value
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for globvar.
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Args:
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text: Multicall object containing the text information.
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searchphrase: String phrase to search.
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io: iomenu.IOBinding instance containing file path.
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"""
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SearchDialogBase.open(self, text, searchphrase)
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if io:
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path = io.filename or ""
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else:
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path = ""
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dir, base = os.path.split(path)
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head, tail = os.path.splitext(base)
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if not tail:
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tail = ".py"
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self.globvar.set(os.path.join(dir, "*" + tail))
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def create_entries(self):
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"Create base entry widgets and add widget for search path."
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SearchDialogBase.create_entries(self)
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self.globent = self.make_entry("In files:", self.globvar)[0]
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def create_other_buttons(self):
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"Add check button to recurse down subdirectories."
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btn = Checkbutton(
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self.make_frame()[0], variable=self.recvar,
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text="Recurse down subdirectories")
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btn.pack(side="top", fill="both")
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def create_command_buttons(self):
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"Create base command buttons and add button for Search Files."
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SearchDialogBase.create_command_buttons(self)
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self.make_button("Search Files", self.default_command, isdef=True)
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def default_command(self, event=None):
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"""Grep for search pattern in file path. The default command is bound
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to <Return>.
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If entry values are populated, set OutputWindow as stdout
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and perform search. The search dialog is closed automatically
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when the search begins.
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"""
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prog = self.engine.getprog()
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if not prog:
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return
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path = self.globvar.get()
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if not path:
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self.top.bell()
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return
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from idlelib.outwin import OutputWindow # leave here!
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save = sys.stdout
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try:
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sys.stdout = OutputWindow(self.flist)
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self.grep_it(prog, path)
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finally:
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sys.stdout = save
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def grep_it(self, prog, path):
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"""Search for prog within the lines of the files in path.
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For the each file in the path directory, open the file and
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search each line for the matching pattern. If the pattern is
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found, write the file and line information to stdout (which
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is an OutputWindow).
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Args:
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prog: The compiled, cooked search pattern.
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path: String containing the search path.
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"""
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folder, filepat = os.path.split(path)
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if not folder:
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folder = os.curdir
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filelist = sorted(findfiles(folder, filepat, self.recvar.get()))
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self.close()
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pat = self.engine.getpat()
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print(f"Searching {pat!r} in {path} ...")
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hits = 0
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try:
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for fn in filelist:
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try:
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with open(fn, errors='replace') as f:
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for lineno, line in enumerate(f, 1):
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if line[-1:] == '\n':
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line = line[:-1]
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if prog.search(line):
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sys.stdout.write(f"{fn}: {lineno}: {line}\n")
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hits += 1
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except OSError as msg:
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print(msg)
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print(f"Hits found: {hits}\n(Hint: right-click to open locations.)"
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if hits else "No hits.")
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except AttributeError:
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# Tk window has been closed, OutputWindow.text = None,
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# so in OW.write, OW.text.insert fails.
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pass
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def _grep_dialog(parent): # htest #
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from tkinter import Toplevel, Text, SEL, END
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from tkinter.ttk import Frame, Button
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from idlelib.pyshell import PyShellFileList
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top = Toplevel(parent)
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top.title("Test GrepDialog")
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x, y = map(int, parent.geometry().split('+')[1:])
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top.geometry(f"+{x}+{y + 175}")
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flist = PyShellFileList(top)
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frame = Frame(top)
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frame.pack()
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text = Text(frame, height=5)
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text.pack()
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def show_grep_dialog():
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text.tag_add(SEL, "1.0", END)
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grep(text, flist=flist)
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text.tag_remove(SEL, "1.0", END)
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button = Button(frame, text="Show GrepDialog", command=show_grep_dialog)
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button.pack()
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if __name__ == "__main__":
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from unittest import main
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main('idlelib.idle_test.test_grep', verbosity=2, exit=False)
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from idlelib.idle_test.htest import run
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run(_grep_dialog)
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