* - tour - touring some programming systems

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author	elioat <elioat@tilde.institute>	2025-01-10 20:31:26 -0500
committer	elioat <elioat@tilde.institute>	2025-01-10 20:31:26 -0500
commit	23a9b6fe9bd7fa07a92f42eb43ef91799de2986c (patch)
tree	de76bbdf54f9658ce57aa69ba2a0b451590b3691 /js/games/nluqo.github.io/~bh/part1.html
parent	bf01d51d4b849ce716eae0303a669841d4b914f3 (diff)
download	tour-23a9b6fe9bd7fa07a92f42eb43ef91799de2986c.tar.gz

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# Copyright (C) 2009, 2010 Roman Zimbelmann <romanz@lavabit.com> # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. ''' This is the default file for command definitions. Each command is a subclass of `Command'. Several methods are defined to interface with the console: execute: call this method when the command is executed. tab: call this method when tab is pressed. quick: call this method after each keypress in the QuickCommandConsole. The return values for tab() can be either: None: There is no tab completion A string: Change the console to this string A list/tuple/generator: cycle through every item in it The return value for quick() can be: False: Nothing happens True: Execute the command afterwards The return value for execute() doesn't matter. If you want to add custom commands, you can create a file ~/.ranger/commands.py, add the line: from ranger.api.commands import * and write some command definitions, for example: class tabnew(Command): def execute(self): self.fm.tab_new() class tabgo(Command): """ :tabgo <n> Go to the nth tab. """ def execute(self): num = self.line.split()[1] self.fm.tab_open(int(num)) For a list of all actions, check /ranger/core/actions.py. ''' from ranger.api.commands import * alias('e', 'edit') alias('q', 'quit') alias('q!', 'quit!') alias('qall', 'quit!') class cd(Command): """ :cd <dirname> The cd command changes the directory. The command 'cd -' is equivalent to typing ``. In the quick console, the directory will be entered without the need to press enter, as soon as there is one unambiguous match. """ def execute(self): line = parse(self.line) try: destination = line.rest(1) except IndexError: destination = '~' if destination == '-': self.fm.enter_bookmark('`') else: self.fm.cd(destination) def tab(self): return self._tab_only_directories() def quick(self): from os.path import isdir, join, normpath line = parse(self.line) cwd = self.fm.env.cwd.path rel_dest = line.rest(1) if not rel_dest: return False abs_dest = normpath(join(cwd, rel_dest)) return rel_dest != '.' and isdir(abs_dest) class find(Command): """ :find <string> The find command will attempt to find a partial, case insensitive match in the filenames of the current directory. In the quick command console, once there is one unambiguous match, the file will be run automatically. """ count = 0 tab = Command._tab_directory_content def execute(self): if self.mode != cmode.COMMAND_QUICK: self._search() import re search = parse(self.line).rest(1) search = re.escape(search) self.fm.env.last_search = re.compile(search, re.IGNORECASE) self.fm.search_method = 'search' if self.count == 1: self.fm.move(right=1) self.fm.block_input(0.5) def quick(self): self._search() if self.count == 1: return True def _search(self): self.count = 0 line = parse(self.line) cwd = self.fm.env.cwd try: arg = line.rest(1) except IndexError: return False deq = deque(cwd.files) deq.rotate(-cwd.pointer) i = 0 for fsobj in deq: filename = fsobj.basename_lower if arg in filename: self.count += 1 if self.count == 1: cwd.move(to=(cwd.pointer + i) % len(cwd.files)) self.fm.env.cf = cwd.pointed_obj if self.count > 1: return False i += 1 return self.count == 1 class set(Command): """ :set <option name>=<python expression> Gives an option a new value. """ def execute(self): line = parse(self.line) name = line.chunk(1) name, value, _ = line.parse_setting_line() if name and value: try: value = eval(value) except: pass self.fm.settings[name] = value def tab(self): line = parse(self.line) from ranger import log log(line.parse_setting_line()) name, value, name_done = line.parse_setting_line() settings = self.fm.settings if not name: return (line + setting for setting in settings) if not value and not name_done: return (line + setting for setting in settings \ if setting.startswith(name)) if not value: return line + repr(settings[name]) if bool in settings.types_of(name): if 'true'.startswith(value.lower()): return line + 'True' if 'false'.startswith(value.lower()): return line + 'False' class quit(Command): """ :quit Closes the current tab. If there is only one tab, quit the program. """ def execute(self): if len(self.fm.tabs) <= 1: self.fm.exit() self.fm.tab_close() class quit_now(Command): """ :quit! Quits the program immediately. """ name = 'quit!' def execute(self): self.fm.exit() class terminal(Command): """ :terminal Spawns an "x-terminal-emulator" starting in the current directory. """ def execute(self): self.fm.run('x-terminal-emulator', flags='d') class delete(Command): """ :delete Tries to delete the selection. "Selection" is defined as all the "marked files" (by default, you can mark files with space or v). If there are no marked files, use the "current file" (where the cursor is) When attempting to delete non-empty directories or multiple marked files, it will require a confirmation: The last word in the line has to start with a 'y'. This may look like: :delete yes :delete seriously? yeah! """ allow_abbrev = False WARNING = 'delete seriously? ' def execute(self): line = parse(self.line) lastword = line.chunk(-1) if lastword.startswith('y'): # user confirmed deletion! return self.fm.delete() elif self.line.startswith(delete.WARNING): # user did not confirm deletion return cwd = self.fm.env.cwd cf = self.fm.env.cf if cwd.marked_items or (cf.is_directory and not cf.is_link \ and len(os.listdir(cf.path)) > 0): # better ask for a confirmation, when attempting to # delete multiple files or a non-empty directory. return self.fm.open_console(self.mode, delete.WARNING) # no need for a confirmation, just delete self.fm.delete() class mkdir(Command): """ :mkdir <dirname> Creates a directory with the name <dirname>. """ def execute(self): from os.path import join, expanduser, lexists from os import mkdir line = parse(self.line) dirname = join(self.fm.env.cwd.path, expanduser(line.rest(1))) if not lexists(dirname): mkdir(dirname) else: self.fm.notify("file/directory exists!", bad=True) class touch(Command): """ :touch <fname> Creates a file with the name <fname>. """ def execute(self): from os.path import join, expanduser, lexists from os import mkdir line = parse(self.line) fname = join(self.fm.env.cwd.path, expanduser(line.rest(1))) if not lexists(fname): open(fname, 'a') else: self.fm.notify("file/directory exists!", bad=True) class edit(Command): """ :edit <filename> Opens the specified file in vim """ def execute(self): line = parse(self.line) self.fm.edit_file(line.rest(1)) def tab(self): return self._tab_directory_content() class eval_(Command): """ :eval <python code> Evaluates the python code. `fm' is a reference to the FM instance. To display text, use the function `p'. Examples: :eval fm :eval len(fm.env.directories) :eval p("Hello World!") """ name = 'eval' def execute(self): code = parse(self.line).rest(1) fm = self.fm p = fm.notify try: try: result = eval(code) except SyntaxError: exec(code) else: if result: p(result) except Exception as err: p(err) class rename(Command): """ :rename <newname> Changes the name of the currently highlighted file to <newname> """ def execute(self): from ranger.fsobject.file import File line = parse(self.line) if not line.rest(1): return self.fm.notify('Syntax: rename <newname>', bad=True) self.fm.rename(self.fm.env.cf, line.rest(1)) f = File(line.rest(1)) self.fm.env.cwd.pointed_obj = f self.fm.env.cf = f def tab(self): return self._tab_directory_content() class chmod(Command): """ :chmod <octal number> Sets the permissions of the selection to the octal number. The octal number is between 0 and 777. The digits specify the permissions for the user, the group and others. A 1 permits execution, a 2 permits writing, a 4 permits reading. Add those numbers to combine them. So a 7 permits everything. """ def execute(self): line = parse(self.line) mode = line.rest(1) try: mode = int(mode, 8) if mode < 0 or mode > 511: raise ValueError except ValueError: self.fm.notify("Need an octal number between 0 and 777!", bad=True) return for file in self.fm.env.get_selection(): try: os.chmod(file.path, mode) except Exception as ex: self.fm.notify(ex) try: # reloading directory. maybe its better to reload the selected # files only. self.fm.env.cwd.load_content() except: pass class filter(Command): """ :filter <string> Displays only the files which contain <string> in their basename. """ def execute(self): line = parse(self.line) self.fm.set_filter(line.rest(1)) class grep(Command): """ :grep <string> Looks for a string in all marked files or directories """ def execute(self): line = parse(self.line) if line.rest(1): action = ['grep', '--color=always', '--line-number'] action.extend(['-e', line.rest(1), '-r']) action.extend(f.path for f in self.fm.env.get_selection()) self.fm.execute_command(action, flags='p')


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