|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (c) 2010, 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.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# Standard libary imports.
|
|
|
from base64 import decodestring
|
|
|
import os
|
|
|
import re
|
|
|
|
|
|
# System libary imports.
|
|
|
from IPython.external.qt import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from IPython.utils.traitlets import Bool
|
|
|
from IPython.frontend.qt.svg import save_svg, svg_to_clipboard, svg_to_image
|
|
|
from ipython_widget import IPythonWidget
|
|
|
|
|
|
|
|
|
class RichIPythonWidget(IPythonWidget):
|
|
|
""" An IPythonWidget that supports rich text, including lists, images, and
|
|
|
tables. Note that raw performance will be reduced compared to the plain
|
|
|
text version.
|
|
|
"""
|
|
|
|
|
|
# RichIPythonWidget protected class variables.
|
|
|
_payload_source_plot = 'IPython.zmq.pylab.backend_payload.add_plot_payload'
|
|
|
_jpg_supported = Bool(False)
|
|
|
|
|
|
# Used to determine whether a given html export attempt has already
|
|
|
# displayed a warning about being unable to convert a png to svg.
|
|
|
_svg_warning_displayed = False
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'object' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, *args, **kw):
|
|
|
""" Create a RichIPythonWidget.
|
|
|
"""
|
|
|
kw['kind'] = 'rich'
|
|
|
super(RichIPythonWidget, self).__init__(*args, **kw)
|
|
|
|
|
|
# Configure the ConsoleWidget HTML exporter for our formats.
|
|
|
self._html_exporter.image_tag = self._get_image_tag
|
|
|
|
|
|
# Dictionary for resolving document resource names to SVG data.
|
|
|
self._name_to_svg_map = {}
|
|
|
|
|
|
# Do we support jpg ?
|
|
|
# it seems that sometime jpg support is a plugin of QT, so try to assume
|
|
|
# it is not always supported.
|
|
|
_supported_format = map(str, QtGui.QImageReader.supportedImageFormats())
|
|
|
self._jpg_supported = 'jpeg' in _supported_format
|
|
|
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface overides
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def export_html(self):
|
|
|
""" Shows a dialog to export HTML/XML in various formats.
|
|
|
|
|
|
Overridden in order to reset the _svg_warning_displayed flag prior
|
|
|
to the export running.
|
|
|
"""
|
|
|
self._svg_warning_displayed = False
|
|
|
super(RichIPythonWidget, self).export_html()
|
|
|
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _context_menu_make(self, pos):
|
|
|
""" Reimplemented to return a custom context menu for images.
|
|
|
"""
|
|
|
format = self._control.cursorForPosition(pos).charFormat()
|
|
|
name = format.stringProperty(QtGui.QTextFormat.ImageName)
|
|
|
if name:
|
|
|
menu = QtGui.QMenu()
|
|
|
|
|
|
menu.addAction('Copy Image', lambda: self._copy_image(name))
|
|
|
menu.addAction('Save Image As...', lambda: self._save_image(name))
|
|
|
menu.addSeparator()
|
|
|
|
|
|
svg = self._name_to_svg_map.get(name, None)
|
|
|
if svg is not None:
|
|
|
menu.addSeparator()
|
|
|
menu.addAction('Copy SVG', lambda: svg_to_clipboard(svg))
|
|
|
menu.addAction('Save SVG As...',
|
|
|
lambda: save_svg(svg, self._control))
|
|
|
else:
|
|
|
menu = super(RichIPythonWidget, self)._context_menu_make(pos)
|
|
|
return menu
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'BaseFrontendMixin' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
def _pre_image_append(self, msg, prompt_number):
|
|
|
""" Append the Out[] prompt and make the output nicer
|
|
|
|
|
|
Shared code for some the following if statement
|
|
|
"""
|
|
|
self.log.debug("pyout: %s", msg.get('content', ''))
|
|
|
self._append_plain_text(self.output_sep, True)
|
|
|
self._append_html(self._make_out_prompt(prompt_number), True)
|
|
|
self._append_plain_text('\n', True)
|
|
|
|
|
|
def _handle_pyout(self, msg):
|
|
|
""" Overridden to handle rich data types, like SVG.
|
|
|
"""
|
|
|
if not self._hidden and self._is_from_this_session(msg):
|
|
|
content = msg['content']
|
|
|
prompt_number = content.get('execution_count', 0)
|
|
|
data = content['data']
|
|
|
if data.has_key('image/svg+xml'):
|
|
|
self._pre_image_append(msg, prompt_number)
|
|
|
self._append_svg(data['image/svg+xml'], True)
|
|
|
self._append_html(self.output_sep2, True)
|
|
|
elif data.has_key('image/png'):
|
|
|
self._pre_image_append(msg, prompt_number)
|
|
|
self._append_png(decodestring(data['image/png'].encode('ascii')), True)
|
|
|
self._append_html(self.output_sep2, True)
|
|
|
elif data.has_key('image/jpeg') and self._jpg_supported:
|
|
|
self._pre_image_append(msg, prompt_number)
|
|
|
self._append_jpg(decodestring(data['image/jpeg'].encode('ascii')), True)
|
|
|
self._append_html(self.output_sep2, True)
|
|
|
else:
|
|
|
# Default back to the plain text representation.
|
|
|
return super(RichIPythonWidget, self)._handle_pyout(msg)
|
|
|
|
|
|
def _handle_display_data(self, msg):
|
|
|
""" Overridden to handle rich data types, like SVG.
|
|
|
"""
|
|
|
if not self._hidden and self._is_from_this_session(msg):
|
|
|
source = msg['content']['source']
|
|
|
data = msg['content']['data']
|
|
|
metadata = msg['content']['metadata']
|
|
|
# Try to use the svg or html representations.
|
|
|
# FIXME: Is this the right ordering of things to try?
|
|
|
if data.has_key('image/svg+xml'):
|
|
|
self.log.debug("display: %s", msg.get('content', ''))
|
|
|
svg = data['image/svg+xml']
|
|
|
self._append_svg(svg, True)
|
|
|
elif data.has_key('image/png'):
|
|
|
self.log.debug("display: %s", msg.get('content', ''))
|
|
|
# PNG data is base64 encoded as it passes over the network
|
|
|
# in a JSON structure so we decode it.
|
|
|
png = decodestring(data['image/png'].encode('ascii'))
|
|
|
self._append_png(png, True)
|
|
|
elif data.has_key('image/jpeg') and self._jpg_supported:
|
|
|
self.log.debug("display: %s", msg.get('content', ''))
|
|
|
jpg = decodestring(data['image/jpeg'].encode('ascii'))
|
|
|
self._append_jpg(jpg, True)
|
|
|
else:
|
|
|
# Default back to the plain text representation.
|
|
|
return super(RichIPythonWidget, self)._handle_display_data(msg)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'RichIPythonWidget' protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _append_jpg(self, jpg, before_prompt=False):
|
|
|
""" Append raw JPG data to the widget."""
|
|
|
self._append_custom(self._insert_jpg, jpg, before_prompt)
|
|
|
|
|
|
def _append_png(self, png, before_prompt=False):
|
|
|
""" Append raw PNG data to the widget.
|
|
|
"""
|
|
|
self._append_custom(self._insert_png, png, before_prompt)
|
|
|
|
|
|
def _append_svg(self, svg, before_prompt=False):
|
|
|
""" Append raw SVG data to the widget.
|
|
|
"""
|
|
|
self._append_custom(self._insert_svg, svg, before_prompt)
|
|
|
|
|
|
def _add_image(self, image):
|
|
|
""" Adds the specified QImage to the document and returns a
|
|
|
QTextImageFormat that references it.
|
|
|
"""
|
|
|
document = self._control.document()
|
|
|
name = str(image.cacheKey())
|
|
|
document.addResource(QtGui.QTextDocument.ImageResource,
|
|
|
QtCore.QUrl(name), image)
|
|
|
format = QtGui.QTextImageFormat()
|
|
|
format.setName(name)
|
|
|
return format
|
|
|
|
|
|
def _copy_image(self, name):
|
|
|
""" Copies the ImageResource with 'name' to the clipboard.
|
|
|
"""
|
|
|
image = self._get_image(name)
|
|
|
QtGui.QApplication.clipboard().setImage(image)
|
|
|
|
|
|
def _get_image(self, name):
|
|
|
""" Returns the QImage stored as the ImageResource with 'name'.
|
|
|
"""
|
|
|
document = self._control.document()
|
|
|
image = document.resource(QtGui.QTextDocument.ImageResource,
|
|
|
QtCore.QUrl(name))
|
|
|
return image
|
|
|
|
|
|
def _get_image_tag(self, match, path = None, format = "png"):
|
|
|
""" Return (X)HTML mark-up for the image-tag given by match.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
match : re.SRE_Match
|
|
|
A match to an HTML image tag as exported by Qt, with
|
|
|
match.group("Name") containing the matched image ID.
|
|
|
|
|
|
path : string|None, optional [default None]
|
|
|
If not None, specifies a path to which supporting files may be
|
|
|
written (e.g., for linked images). If None, all images are to be
|
|
|
included inline.
|
|
|
|
|
|
format : "png"|"svg"|"jpg", optional [default "png"]
|
|
|
Format for returned or referenced images.
|
|
|
"""
|
|
|
if format in ("png","jpg"):
|
|
|
try:
|
|
|
image = self._get_image(match.group("name"))
|
|
|
except KeyError:
|
|
|
return "<b>Couldn't find image %s</b>" % match.group("name")
|
|
|
|
|
|
if path is not None:
|
|
|
if not os.path.exists(path):
|
|
|
os.mkdir(path)
|
|
|
relpath = os.path.basename(path)
|
|
|
if image.save("%s/qt_img%s.%s" % (path, match.group("name"), format),
|
|
|
"PNG"):
|
|
|
return '<img src="%s/qt_img%s.%s">' % (relpath,
|
|
|
match.group("name"),format)
|
|
|
else:
|
|
|
return "<b>Couldn't save image!</b>"
|
|
|
else:
|
|
|
ba = QtCore.QByteArray()
|
|
|
buffer_ = QtCore.QBuffer(ba)
|
|
|
buffer_.open(QtCore.QIODevice.WriteOnly)
|
|
|
image.save(buffer_, format.upper())
|
|
|
buffer_.close()
|
|
|
return '<img src="data:image/%s;base64,\n%s\n" />' % (
|
|
|
format,re.sub(r'(.{60})',r'\1\n',str(ba.toBase64())))
|
|
|
|
|
|
elif format == "svg":
|
|
|
try:
|
|
|
svg = str(self._name_to_svg_map[match.group("name")])
|
|
|
except KeyError:
|
|
|
if not self._svg_warning_displayed:
|
|
|
QtGui.QMessageBox.warning(self, 'Error converting PNG to SVG.',
|
|
|
'Cannot convert a PNG to SVG. To fix this, add this '
|
|
|
'to your ipython config:\n\n'
|
|
|
'\tc.InlineBackendConfig.figure_format = \'svg\'\n\n'
|
|
|
'And regenerate the figures.',
|
|
|
QtGui.QMessageBox.Ok)
|
|
|
self._svg_warning_displayed = True
|
|
|
return ("<b>Cannot convert a PNG to SVG.</b> "
|
|
|
"To fix this, add this to your config: "
|
|
|
"<span>c.InlineBackendConfig.figure_format = 'svg'</span> "
|
|
|
"and regenerate the figures.")
|
|
|
|
|
|
# Not currently checking path, because it's tricky to find a
|
|
|
# cross-browser way to embed external SVG images (e.g., via
|
|
|
# object or embed tags).
|
|
|
|
|
|
# Chop stand-alone header from matplotlib SVG
|
|
|
offset = svg.find("<svg")
|
|
|
assert(offset > -1)
|
|
|
|
|
|
return svg[offset:]
|
|
|
|
|
|
else:
|
|
|
return '<b>Unrecognized image format</b>'
|
|
|
|
|
|
def _insert_jpg(self, cursor, jpg):
|
|
|
""" Insert raw PNG data into the widget."""
|
|
|
self._insert_img(cursor, jpg, 'jpg')
|
|
|
|
|
|
def _insert_png(self, cursor, png):
|
|
|
""" Insert raw PNG data into the widget.
|
|
|
"""
|
|
|
self._insert_img(cursor, png, 'png')
|
|
|
|
|
|
def _insert_img(self, cursor, img, fmt):
|
|
|
""" insert a raw image, jpg or png """
|
|
|
try:
|
|
|
image = QtGui.QImage()
|
|
|
image.loadFromData(img, fmt.upper())
|
|
|
except ValueError:
|
|
|
self._insert_plain_text(cursor, 'Received invalid %s data.'%fmt)
|
|
|
else:
|
|
|
format = self._add_image(image)
|
|
|
cursor.insertBlock()
|
|
|
cursor.insertImage(format)
|
|
|
cursor.insertBlock()
|
|
|
|
|
|
def _insert_svg(self, cursor, svg):
|
|
|
""" Insert raw SVG data into the widet.
|
|
|
"""
|
|
|
try:
|
|
|
image = svg_to_image(svg)
|
|
|
except ValueError:
|
|
|
self._insert_plain_text(cursor, 'Received invalid SVG data.')
|
|
|
else:
|
|
|
format = self._add_image(image)
|
|
|
self._name_to_svg_map[format.name()] = svg
|
|
|
cursor.insertBlock()
|
|
|
cursor.insertImage(format)
|
|
|
cursor.insertBlock()
|
|
|
|
|
|
def _save_image(self, name, format='PNG'):
|
|
|
""" Shows a save dialog for the ImageResource with 'name'.
|
|
|
"""
|
|
|
dialog = QtGui.QFileDialog(self._control, 'Save Image')
|
|
|
dialog.setAcceptMode(QtGui.QFileDialog.AcceptSave)
|
|
|
dialog.setDefaultSuffix(format.lower())
|
|
|
dialog.setNameFilter('%s file (*.%s)' % (format, format.lower()))
|
|
|
if dialog.exec_():
|
|
|
filename = dialog.selectedFiles()[0]
|
|
|
image = self._get_image(name)
|
|
|
image.save(filename, format)
|
|
|
|
