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gallery-dl/gallery_dl/output.py
2017-04-26 11:33:19 +02:00

140 lines
3.8 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2015-2017 Mike Fährmann
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
import os
import sys
import shutil
from . import config
def select():
"""Automatically select a suitable output class"""
pdict = {
"default": PipeOutput,
"pipe": PipeOutput,
"term": TerminalOutput,
"terminal": TerminalOutput,
"color": ColorOutput,
"null": NullOutput,
}
omode = config.get(("output", "mode"), "auto").lower()
if omode in pdict:
return pdict[omode]()
elif omode == "auto":
if hasattr(sys.stdout, "isatty") and sys.stdout.isatty():
return ColorOutput() if ANSI else TerminalOutput()
else:
return PipeOutput()
else:
raise Exception("invalid output mode: " + omode)
def safeprint(txt, **kwargs):
"""Handle unicode errors and replace invalid characters"""
try:
print(txt, **kwargs)
except UnicodeEncodeError:
enc = sys.stdout.encoding
txt = txt.encode(enc, errors="replace").decode(enc)
print(txt, **kwargs)
class NullOutput():
def start(self, path):
"""Print a message indicating the start of a download"""
def skip(self, path):
"""Print a message indicating that a download has been skipped"""
def success(self, path, tries):
"""Print a message indicating the completion of a download"""
def error(self, path, error, tries, max_tries):
"""Print a message indicating an error during download"""
class PipeOutput(NullOutput):
def skip(self, path):
print(CHAR_SKIP, path, sep="", flush=True)
def success(self, path, tries):
print(path, flush=True)
class TerminalOutput(NullOutput):
def __init__(self):
self.short = config.get(("output", "shorten"), True)
if self.short:
self.width = shutil.get_terminal_size().columns - OFFSET
def start(self, path):
safeprint(self.shorten(" " + path), end="", flush=True)
def skip(self, path):
safeprint(self.shorten(CHAR_SKIP + path))
def success(self, path, tries):
print("\r", end="")
safeprint(self.shorten(CHAR_SUCCESS + path))
def error(self, path, error, tries, max_tries):
if tries <= 1 and path:
print("\r", end="")
safeprint(self.shorten(CHAR_ERROR + path))
print("\r[Error] ", end="")
safeprint(error, end="")
print(" (", tries, "/", max_tries, ")", sep="")
def shorten(self, txt):
"""Reduce the length of 'txt' to the width of the terminal"""
if self.short and len(txt) > self.width:
hwidth = self.width // 2 - OFFSET
return "".join((
txt[:hwidth-1],
CHAR_ELLIPSIES,
txt[-hwidth-(self.width % 2):]
))
return txt
class ColorOutput(TerminalOutput):
def start(self, path):
print(self.shorten(path), end="", flush=True)
def skip(self, path):
print("\033[2m", self.shorten(path), "\033[0m", sep="")
def success(self, path, tries):
print("\r\033[1;32m", self.shorten(path), "\033[0m", sep="")
def error(self, path, error, tries, max_tries):
if tries <= 1 and path:
print("\r\033[1;31m", self.shorten(path), sep="")
print("\r\033[0;31m[Error]\033[0m ", error,
" (", tries, "/", max_tries, ")", sep="")
if os.name == "nt":
ANSI = os.environ.get("TERM") == "ANSI"
OFFSET = 1
CHAR_SKIP = "# "
CHAR_ERROR = "! "
CHAR_SUCCESS = "* "
CHAR_ELLIPSIES = "..."
else:
ANSI = True
OFFSET = 0
CHAR_SKIP = "# "
CHAR_ERROR = ""
CHAR_SUCCESS = ""
CHAR_ELLIPSIES = ""