upstream/ipython Files · IPython/utils/ulinecache.py

Reverse hscrollbar min-height hack on OS X...

Reverse hscrollbar min-height hack on OS X OS X has optional behavior to only draw scrollbars during scroll, which causes problems for CodeMirror's scrollbars. CodeMirror's solution is to set a minimum size for their scrollbars, which is always present. The trade is that the container overlays most of the last line, swallowing click events when there is scrolling to do, even when no scrollbar is visible. This reverses the trade, recovering the click events at the expense of never showing the horizontal scrollbar on OS X when this option is enabled.

Thomas Kluyver - - Load All Authors

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             ulinecache.py
        
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      """Wrapper around linecache which decodes files to unicode according to PEP 263.

      This is only needed for Python 2 - linecache in Python 3 does the same thing

      itself.

      """

      import functools

      import linecache

      import sys

      from IPython.utils import py3compat

      from IPython.utils import openpy

      if py3compat.PY3:

          getline = linecache.getline

          # getlines has to be looked up at runtime, because doctests monkeypatch it.

          @functools.wraps(linecache.getlines)

          def getlines(filename, module_globals=None):

              return linecache.getlines(filename, module_globals=module_globals)

      else:

          def getlines(filename, module_globals=None):

              """Get the lines (as unicode) for a file from the cache.

              Update the cache if it doesn't contain an entry for this file already."""

              filename = py3compat.cast_bytes(filename, sys.getfilesystemencoding())

              lines = linecache.getlines(filename, module_globals=module_globals)

              # The bits we cache ourselves can be unicode.

              if (not lines) or isinstance(lines[0], py3compat.unicode_type):

                  return lines

              readline = openpy._list_readline(lines)

              try:

                  encoding, _ = openpy.detect_encoding(readline)

              except SyntaxError:

                  encoding = 'ascii'

              return [l.decode(encoding, 'replace') for l in lines]

          # This is a straight copy of linecache.getline

          def getline(filename, lineno, module_globals=None):

              lines = getlines(filename, module_globals)

              if 1 <= lineno <= len(lines):

                  return lines[lineno-1]

              else:

                  return ''

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				"""Wrapper around linecache which decodes files to unicode according to PEP 263.

				This is only needed for Python 2 - linecache in Python 3 does the same thing
				itself.
				"""
				import functools
				import linecache
				import sys

				from IPython.utils import py3compat
				from IPython.utils import openpy

				if py3compat.PY3:
				getline = linecache.getline

				# getlines has to be looked up at runtime, because doctests monkeypatch it.
				@functools.wraps(linecache.getlines)
				def getlines(filename, module_globals=None):
				return linecache.getlines(filename, module_globals=module_globals)

				else:
				def getlines(filename, module_globals=None):
				"""Get the lines (as unicode) for a file from the cache.
				Update the cache if it doesn't contain an entry for this file already."""
				filename = py3compat.cast_bytes(filename, sys.getfilesystemencoding())
				lines = linecache.getlines(filename, module_globals=module_globals)

				# The bits we cache ourselves can be unicode.
				if (not lines) or isinstance(lines[0], py3compat.unicode_type):
				return lines

				readline = openpy._list_readline(lines)
				try:
				encoding, _ = openpy.detect_encoding(readline)
				except SyntaxError:
				encoding = 'ascii'
				return [l.decode(encoding, 'replace') for l in lines]

				# This is a straight copy of linecache.getline
				def getline(filename, lineno, module_globals=None):
				lines = getlines(filename, module_globals)
				if 1 <= lineno <= len(lines):
				return lines[lineno-1]
				else:
				return ''