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author	David Boddie <david.boddie@nokia.com>	2010-12-22 14:56:01 (GMT)
committer	David Boddie <david.boddie@nokia.com>	2010-12-22 14:56:01 (GMT)
commit	f44f7084a3020ed8e249644d5b5e07f74cb7b070 (patch)
tree	c8293d69241a782b08dfd53eb28be624574e3235 /doc/src/snippets/widgets-tutorial/childwidget/main.cpp
parent	dfcc33409c4acfc265fdb87607862207a92c0a5c (diff)
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"""Grep dialog for Find in Files functionality. Inherits from SearchDialogBase for GUI and uses searchengine to prepare search pattern. """ import fnmatch import os import sys from tkinter import StringVar, BooleanVar from tkinter.ttk import Checkbutton # Frame imported in ...Base from idlelib.searchbase import SearchDialogBase from idlelib import searchengine # Importing OutputWindow here fails due to import loop # EditorWindow -> GrepDialog -> OutputWindow -> EditorWindow def grep(text, io=None, flist=None): """Open the Find in Files dialog. Module-level function to access the singleton GrepDialog instance and open the dialog. If text is selected, it is used as the search phrase; otherwise, the previous entry is used. Args: text: Text widget that contains the selected text for default search phrase. io: iomenu.IOBinding instance with default path to search. flist: filelist.FileList instance for OutputWindow parent. """ root = text._root() engine = searchengine.get(root) if not hasattr(engine, "_grepdialog"): engine._grepdialog = GrepDialog(root, engine, flist) dialog = engine._grepdialog searchphrase = text.get("sel.first", "sel.last") dialog.open(text, searchphrase, io) def walk_error(msg): "Handle os.walk error." print(msg) def findfiles(folder, pattern, recursive): """Generate file names in dir that match pattern. Args: folder: Root directory to search. pattern: File pattern to match. recursive: True to include subdirectories. """ for dirpath, _, filenames in os.walk(folder, onerror=walk_error): yield from (os.path.join(dirpath, name) for name in filenames if fnmatch.fnmatch(name, pattern)) if not recursive: break class GrepDialog(SearchDialogBase): "Dialog for searching multiple files." title = "Find in Files Dialog" icon = "Grep" needwrapbutton = 0 def __init__(self, root, engine, flist): """Create search dialog for searching for a phrase in the file system. Uses SearchDialogBase as the basis for the GUI and a searchengine instance to prepare the search. Attributes: flist: filelist.Filelist instance for OutputWindow parent. globvar: String value of Entry widget for path to search. globent: Entry widget for globvar. Created in create_entries(). recvar: Boolean value of Checkbutton widget for traversing through subdirectories. """ super().__init__(root, engine) self.flist = flist self.globvar = StringVar(root) self.recvar = BooleanVar(root) def open(self, text, searchphrase, io=None): """Make dialog visible on top of others and ready to use. Extend the SearchDialogBase open() to set the initial value for globvar. Args: text: Multicall object containing the text information. searchphrase: String phrase to search. io: iomenu.IOBinding instance containing file path. """ SearchDialogBase.open(self, text, searchphrase) if io: path = io.filename or "" else: path = "" dir, base = os.path.split(path) head, tail = os.path.splitext(base) if not tail: tail = ".py" self.globvar.set(os.path.join(dir, "*" + tail)) def create_entries(self): "Create base entry widgets and add widget for search path." SearchDialogBase.create_entries(self) self.globent = self.make_entry("In files:", self.globvar)[0] def create_other_buttons(self): "Add check button to recurse down subdirectories." btn = Checkbutton( self.make_frame()[0], variable=self.recvar, text="Recurse down subdirectories") btn.pack(side="top", fill="both") def create_command_buttons(self): "Create base command buttons and add button for Search Files." SearchDialogBase.create_command_buttons(self) self.make_button("Search Files", self.default_command, isdef=True) def default_command(self, event=None): """Grep for search pattern in file path. The default command is bound to <Return>. If entry values are populated, set OutputWindow as stdout and perform search. The search dialog is closed automatically when the search begins. """ prog = self.engine.getprog() if not prog: return path = self.globvar.get() if not path: self.top.bell() return from idlelib.outwin import OutputWindow # leave here! save = sys.stdout try: sys.stdout = OutputWindow(self.flist) self.grep_it(prog, path) finally: sys.stdout = save def grep_it(self, prog, path): """Search for prog within the lines of the files in path. For the each file in the path directory, open the file and search each line for the matching pattern. If the pattern is found, write the file and line information to stdout (which is an OutputWindow). Args: prog: The compiled, cooked search pattern. path: String containing the search path. """ folder, filepat = os.path.split(path) if not folder: folder = os.curdir filelist = sorted(findfiles(folder, filepat, self.recvar.get())) self.close() pat = self.engine.getpat() print(f"Searching {pat!r} in {path} ...") hits = 0 try: for fn in filelist: try: with open(fn, errors='replace') as f: for lineno, line in enumerate(f, 1): if line[-1:] == '\n': line = line[:-1] if prog.search(line): sys.stdout.write(f"{fn}: {lineno}: {line}\n") hits += 1 except OSError as msg: print(msg) print(f"Hits found: {hits}\n(Hint: right-click to open locations.)" if hits else "No hits.") except AttributeError: # Tk window has been closed, OutputWindow.text = None, # so in OW.write, OW.text.insert fails. pass def _grep_dialog(parent): # htest # from tkinter import Toplevel, Text, SEL, END from tkinter.ttk import Frame, Button from idlelib.pyshell import PyShellFileList top = Toplevel(parent) top.title("Test GrepDialog") x, y = map(int, parent.geometry().split('+')[1:]) top.geometry(f"+{x}+{y + 175}") flist = PyShellFileList(top) frame = Frame(top) frame.pack() text = Text(frame, height=5) text.pack() def show_grep_dialog(): text.tag_add(SEL, "1.0", END) grep(text, flist=flist) text.tag_remove(SEL, "1.0", END) button = Button(frame, text="Show GrepDialog", command=show_grep_dialog) button.pack() if __name__ == "__main__": from unittest import main main('idlelib.idle_test.test_grep', verbosity=2, exit=False) from idlelib.idle_test.htest import run run(_grep_dialog)


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