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Project Description

sphinxcontrib-imagehelper

sphinxcontrib-imagehelper is helpers for creating image Sphinx extensions.

Adding new image format support to Sphinx is too boring. This helper helps you to create image sphinx extensions.

It provides these features:

  • Caching converted images
  • Conseal sphinx directory structure; determine path of images automatically
  • Support common options for image directive (cf. :height:, :scale:, :align:, and so on)
  • Enhance standard imaging directives; image and figure get capability to embed new image format

With sphinxcontrib-imagehelper, all you have to do is only convert new image format to well known image formats.

Install

$ pip install sphinxcontrib-imagehelper

Example

from sphinxcontrib.imagehelper import (
    add_image_type, add_image_directive, add_figure_directive, ImageConverter
)

# Declare converter class inherits ImageConverter
class MyImageConverter(ImageConverter):
    # Override `get_filename_for()` to determine filename
    def get_filename_for(self, node):
        # filename is came from its URI and configuration
        hashed = sha1((node['uri'] + self.app.config.some_convert_settings).encode('utf-8')).hexdigest()
        return 'myimage-%s.png' % hashed

    # Override `convert()` to convert new image format to well known image formats (PNG, JPG and so on)
    def convert(self, node, filename, to):
        # Hint: you can refer self.app.builder.format to switch conversion behavior
        succeeded = convert_myimage_to_png(filename, to,
                                           option1=node['option'],
                                           option2=self.app.config.some_convert_settings)
        if succeeded:
            return True  # return True if conversion succeeded
        else:
            return False

def setup(app)
    # Register new image type: myimage
    add_image_type(app, 'my', 'img', MyImageConverter)

    # Register my-image directive
    add_image_directive(app, 'my')

    # Register my-figure directive
    add_figure_directive(app, 'my')

Helpers

sphinxcontrib.imagehelper.add_image_type(app, name, ext, handler)
Register a new image type which is identified with file extension ext. The handler is used to convert image formats.
sphinxcontrib.imagehelper.ImageConverter

A handler class for converting image formats. It is used at add_image_type(). The developers of sphinx-extensions should create a handler class which inherits ImageConverter, and should override two following methods:

ImageConverter.option_spec
A definition of additional options. By default, it is empty dict.
ImageConverter.get_last_modified_for(self, node)
Determine last modified time of target image. By default, this method returns the timestamp of the image file.
ImageConverter.get_filename_for(self, node)

Determine a filename of converted image. By default, this method returns the filename replaced its extension with ‘.png’:

def get_filename_for(self, node):
    return os.path.splitext(node['uri'])[0] + '.png'
ImageConverter.convert(self, node, filename, to)
Convert image to embedable format. By default, this method does nothing.
sphinxcontrib.imagehelper.add_image_directive(app, name, option_spec={})

Add a custom image directive to Sphinx. The directive is named as name-image (cf. astah-image).

If option_spec is given, the new directive accepts custom options.

sphinxcontrib.imagehelper.add_figure_directive(app, name, option_spec={})

Add a custom figure directive to Sphinx. The directive is named as name-figure (cf. astah-figure).

If option_spec is given, the new directive accepts custom options.

sphinxcontrib.imagehelper.generate_image_directive(name, option_spec={})
Generate a custom image directive class. The class is not registered to Sphinx. You can enhance the directive class with subclassing.
sphinxcontrib.imagehelper.generate_figure_directive(name, option_spec={})
Generate a custom figure directive class. The class is not registered to Sphinx. You can enhance the directive class with subclassing.
Release History

Release History

1.1.1

This version

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1.1.0

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1.0.1

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1.0.0

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
sphinxcontrib_imagehelper-1.1.1-py2.py3-none-any.whl (9.5 kB) Copy SHA256 Checksum SHA256 2.7 Wheel Dec 11, 2015
sphinxcontrib-imagehelper-1.1.1.tar.gz (6.6 kB) Copy SHA256 Checksum SHA256 Source Dec 11, 2015

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