upstream/ipython Files · IPython/html/widgets/widget_image.py

Fix and ...

Fix and The function in charge of actually converting cursor offset to CodeMirror line number and character number was actually crashing when the cursor was at the last character (loop until undefined, then access length of variable, which is undefined). This was hiding a bug in which when you would completer to a single completion pressing tab after as-you-type filtering, the completion would be completed twice. The logic that was supposed to detect whether or not all completions had a common prefix was actually faulty as the common prefix used to be a string but was then changed to an object. Hence the logic to check whether or not there was actually a common prefix was always true, even for empty string, leading to the deletion of the line (replace by '') in some cases.

Sylvain Corlay - - Load All Authors

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             widget_image.py
        
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      """Image class.  

      Represents an image in the frontend using a widget.

      """

      #-----------------------------------------------------------------------------

      # Copyright (c) 2013, the IPython Development Team.

      #

      # Distributed under the terms of the Modified BSD License.

      #

      # The full license is in the file COPYING.txt, distributed with this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      import base64

      from .widget import DOMWidget, register

      from IPython.utils.traitlets import Unicode, CUnicode, Bytes

      from IPython.utils.warn import DeprecatedClass

      #-----------------------------------------------------------------------------

      # Classes

      #-----------------------------------------------------------------------------

      @register('IPython.Image')

      class Image(DOMWidget):

          """Displays an image as a widget.

          The `value` of this widget accepts a byte string.  The byte string is the raw

          image data that you want the browser to display.  You can explicitly define

          the format of the byte string using the `format` trait (which defaults to

          "png")."""

          _view_name = Unicode('ImageView', sync=True)

          # Define the custom state properties to sync with the front-end

          format = Unicode('png', sync=True)

          width = CUnicode(sync=True)

          height = CUnicode(sync=True)

          _b64value = Unicode(sync=True)

          value = Bytes()

          def _value_changed(self, name, old, new):

              self._b64value = base64.b64encode(new)

      # Remove in IPython 4.0

      ImageWidget = DeprecatedClass(Image, 'ImageWidget')

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				"""Image class.

				Represents an image in the frontend using a widget.
				"""
				#-----------------------------------------------------------------------------
				# Copyright (c) 2013, the IPython Development Team.
				#
				# Distributed under the terms of the Modified BSD License.
				#
				# The full license is in the file COPYING.txt, distributed with this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------
				import base64

				from .widget import DOMWidget, register
				from IPython.utils.traitlets import Unicode, CUnicode, Bytes
				from IPython.utils.warn import DeprecatedClass

				#-----------------------------------------------------------------------------
				# Classes
				#-----------------------------------------------------------------------------
				@register('IPython.Image')
				class Image(DOMWidget):
				"""Displays an image as a widget.

				The `value` of this widget accepts a byte string. The byte string is the raw
				image data that you want the browser to display. You can explicitly define
				the format of the byte string using the `format` trait (which defaults to
				"png")."""
				_view_name = Unicode('ImageView', sync=True)

				# Define the custom state properties to sync with the front-end
				format = Unicode('png', sync=True)
				width = CUnicode(sync=True)
				height = CUnicode(sync=True)
				_b64value = Unicode(sync=True)

				value = Bytes()
				def _value_changed(self, name, old, new):
				self._b64value = base64.b64encode(new)


				# Remove in IPython 4.0
				ImageWidget = DeprecatedClass(Image, 'ImageWidget')