77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
import math
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import threading
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from typing import List
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from line import Line
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import os
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from settings import Settings
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class LogFileModel:
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_lock = threading.RLock()
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def __init__(self, file:str, settings: Settings):
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self.settings = settings
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self._file = os.path.realpath(file)
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def get_file(self):
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return self._file
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def __str__(self):
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return self._file
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def get_tab_name(self):
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file_name = os.path.basename(self._file)
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if len(file_name) > 35:
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file_name = file_name[:15] + "..." + file_name[-15:]
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return file_name
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def read_range(self, start_byte: int, end_byte: int):
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with self._lock:
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with open(self._file, 'rb') as f:
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f.seek(start_byte)
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bytes = f.read(end_byte - start_byte)
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return bytes.decode("utf8", errors="ignore")
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def data(self, byte_offset, scroll_lines, lines) -> List[Line]:
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#print("data(%s, %s, %s)" % (byte_offset, scroll_lines, lines))
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lines_before_offset: List[Line] = []
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lines_after_offset: List[Line] = []
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result: List[Line] = []
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lines_to_find = lines + abs(scroll_lines)
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lines_to_return = math.ceil(lines)
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with self._lock:
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# TODO handle lines longer than 4096 bytes
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with open(self._file, 'rb') as f:
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offset = min(byte_offset, self.byte_count())
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offset = max(0, offset - self.settings.max_line_length())
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#print("offset: %s" % (offset))
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eof_reached = True
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f.seek(offset)
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while l := f.readline():
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new_offset = f.tell()
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line = Line(offset, new_offset, l.decode("utf8", errors="ignore").replace("\r", "").replace("\n", ""))
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# print("%s %s" %(line.byte_offset(), line.line()))
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if offset < byte_offset:
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lines_before_offset.append(line)
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else:
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lines_after_offset.append(line)
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offset = f.tell()
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if len(lines_after_offset) >= lines_to_find:
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eof_reached = False
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break
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all_lines = lines_before_offset + lines_after_offset
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start = max(0, len(lines_before_offset) + scroll_lines)
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if start + lines_to_return-1 < len(all_lines):
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result = all_lines[start:start+lines_to_return]
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else:
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result = all_lines[-lines_to_return+1:]
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#print("returning %s lines" % (len(result)))
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return result
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def byte_count(self) -> int:
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return os.stat(self._file).st_size |