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# coding=utf-8
import base64
import random
import sys
from . import documents, results, html_paths, images
from .html_generation import HtmlGenerator, satisfy_html_path
def convert_document_element_to_html(element,
style_map=None,
convert_image=None,
convert_underline=None,
generate_uniquifier=None):
if style_map is None:
style_map = []
if generate_uniquifier is None:
generate_uniquifier = lambda: random.randint(0, 1000000000000000)
html_generator = HtmlGenerator()
converter = DocumentConverter(style_map,
convert_image=convert_image,
convert_underline=convert_underline,
generate_uniquifier=generate_uniquifier)
converter.convert_element_to_html(element, html_generator,)
html_generator.end_all()
return results.Result(html_generator.html_string(), converter.messages)
class DocumentConverter(object):
def __init__(self, style_map, convert_image, convert_underline, generate_uniquifier):
self.messages = []
self._style_map = style_map
self._uniquifier = generate_uniquifier()
self._footnote_ids = []
self._converters = {
documents.Document: self._convert_document,
documents.Paragraph: self._convert_paragraph,
documents.Run: self._convert_run,
documents.Text: self._convert_text,
documents.Hyperlink: self._convert_hyperlink,
documents.Tab: self._convert_tab,
documents.Table: self._convert_table,
documents.TableRow: self._convert_table_row,
documents.TableCell: self._convert_table_cell,
documents.LineBreak: self._line_break,
documents.Image: convert_image or images.inline(self._convert_image),
documents.FootnoteReference: self._convert_footnote_reference,
documents.Footnote: self._convert_footnote,
}
self._convert_underline = convert_underline
def convert_element_to_html(self, element, html_generator):
self._converters[type(element)](element, html_generator)
def _convert_document(self, document, html_generator):
self._convert_elements_to_html(document.children, html_generator)
html_generator.end_all()
html_generator.start("ol")
footnotes = [
document.footnotes.find_footnote_by_id(footnote_id)
for footnote_id in self._footnote_ids
]
self._convert_elements_to_html(footnotes, html_generator)
html_generator.end()
def _convert_paragraph(self, paragraph, html_generator):
html_path = self._find_html_path_for_paragraph(paragraph)
satisfy_html_path(html_generator, html_path)
self._convert_elements_to_html(paragraph.children, html_generator)
def _convert_run(self, run, html_generator):
run_generator = HtmlGenerator()
html_path = self._find_html_path_for_run(run)
if html_path:
satisfy_html_path(run_generator, html_path)
if run.is_bold:
run_generator.start("strong")
if run.is_italic:
run_generator.start("em")
if run.is_underline and self._convert_underline is not None:
self._convert_underline(run_generator)
self._convert_elements_to_html(run.children, run_generator)
run_generator.end_all()
html_generator.append(run_generator)
def _convert_text(self, text, html_generator):
html_generator.text(text.value)
def _convert_hyperlink(self, hyperlink, html_generator):
html_generator.start("a", {"href": hyperlink.href})
self._convert_elements_to_html(hyperlink.children, html_generator)
html_generator.end()
def _convert_tab(self, tab, html_generator):
html_generator.text("\t")
def _convert_table(self, table, html_generator):
html_generator.end_all()
html_generator.start("table")
self._convert_elements_to_html(table.children, html_generator)
html_generator.end()
def _convert_table_row(self, table_row, html_generator):
html_generator.start("tr")
self._convert_elements_to_html(table_row.children, html_generator)
html_generator.end()
def _convert_table_cell(self, table_cell, html_generator):
html_generator.start("td", always_write=True)
for child in table_cell.children:
child_generator = HtmlGenerator()
self.convert_element_to_html(child, child_generator)
child_generator.end_all()
html_generator.append(child_generator)
html_generator.end()
def _line_break(self, line_break, html_generator):
html_generator.self_closing("br")
def _convert_image(self, image):
with image.open() as image_bytes:
encoded_src = base64.b64encode(image_bytes.read()).decode("ascii")
return {
"src": "data:{0};base64,{1}".format(image.content_type, encoded_src)
}
def _convert_footnote_reference(self, footnote_reference, html_generator):
uid = self._footnote_uid(footnote_reference.footnote_id)
html_generator.start("sup")
html_generator.start("a", {
"href": "#footnote-" + uid,
"id": "footnote-ref-" + uid
})
self._footnote_ids.append(footnote_reference.footnote_id);
footnote_number = len(self._footnote_ids)
html_generator.text("[{0}]".format(footnote_number))
html_generator.end()
html_generator.end()
def _convert_footnote(self, footnote, html_generator):
uid = self._footnote_uid(footnote.id)
html_generator.start("li", {"id": "footnote-{0}".format(uid)})
footnote_generator = HtmlGenerator()
self._convert_elements_to_html(footnote.body, footnote_generator)
footnote_generator.text(" ")
footnote_generator.start("a", {"href": "#footnote-ref-{0}".format(uid)})
footnote_generator.text(_up_arrow)
footnote_generator.end_all()
html_generator.append(footnote_generator)
html_generator.end()
def _convert_elements_to_html(self, elements, html_generator):
for element in elements:
self.convert_element_to_html(element, html_generator)
def _find_html_path_for_paragraph(self, paragraph):
default = html_paths.path([html_paths.element("p", fresh=True)])
return self._find_html_path(paragraph, "paragraph", default)
def _find_html_path_for_run(self, run):
return self._find_html_path(run, "run", default=None)
def _find_html_path(self, element, element_type, default):
for style in self._style_map:
document_matcher = style.document_matcher
if _document_matcher_matches(document_matcher, element, element_type):
return style.html_path
if element.style_id is not None:
self.messages.append(results.warning(
"Unrecognised {0} style: {1} (Style ID: {2})".format(
element_type, element.style_name, element.style_id)
))
return default
def _footnote_uid(self, footnote_id):
return "{0}-{1}".format(self._uniquifier, footnote_id)
def _document_matcher_matches(matcher, element, element_type):
return (
matcher.element_type == element_type and (
matcher.style_id is None or
matcher.style_id == element.style_id
) and (
matcher.style_name is None or
matcher.style_name == element.style_name
) and (
element_type != "paragraph" or
matcher.numbering is None or
matcher.numbering == element.numbering
)
)
_up_arrow = "↑"
if sys.version_info[0] < 3:
_up_arrow = _up_arrow.decode("utf8")
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