forked from s442783/HighNeed_projekt_inz
126 lines
4.0 KiB
Python
126 lines
4.0 KiB
Python
from pathlib import Path
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import jinja2
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from django.conf import settings
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from django.template import TemplateDoesNotExist, TemplateSyntaxError
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from django.utils.functional import cached_property
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from django.utils.module_loading import import_string
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from .base import BaseEngine
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class Jinja2(BaseEngine):
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app_dirname = 'jinja2'
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def __init__(self, params):
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params = params.copy()
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options = params.pop('OPTIONS').copy()
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super().__init__(params)
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self.context_processors = options.pop('context_processors', [])
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environment = options.pop('environment', 'jinja2.Environment')
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environment_cls = import_string(environment)
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if 'loader' not in options:
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options['loader'] = jinja2.FileSystemLoader(self.template_dirs)
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options.setdefault('autoescape', True)
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options.setdefault('auto_reload', settings.DEBUG)
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options.setdefault('undefined',
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jinja2.DebugUndefined if settings.DEBUG else jinja2.Undefined)
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self.env = environment_cls(**options)
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def from_string(self, template_code):
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return Template(self.env.from_string(template_code), self)
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def get_template(self, template_name):
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try:
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return Template(self.env.get_template(template_name), self)
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except jinja2.TemplateNotFound as exc:
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raise TemplateDoesNotExist(exc.name, backend=self) from exc
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except jinja2.TemplateSyntaxError as exc:
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new = TemplateSyntaxError(exc.args)
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new.template_debug = get_exception_info(exc)
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raise new from exc
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@cached_property
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def template_context_processors(self):
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return [import_string(path) for path in self.context_processors]
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class Template:
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def __init__(self, template, backend):
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self.template = template
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self.backend = backend
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self.origin = Origin(
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name=template.filename, template_name=template.name,
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)
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def render(self, context=None, request=None):
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from .utils import csrf_input_lazy, csrf_token_lazy
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if context is None:
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context = {}
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if request is not None:
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context['request'] = request
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context['csrf_input'] = csrf_input_lazy(request)
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context['csrf_token'] = csrf_token_lazy(request)
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for context_processor in self.backend.template_context_processors:
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context.update(context_processor(request))
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try:
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return self.template.render(context)
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except jinja2.TemplateSyntaxError as exc:
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new = TemplateSyntaxError(exc.args)
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new.template_debug = get_exception_info(exc)
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raise new from exc
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class Origin:
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"""
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A container to hold debug information as described in the template API
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documentation.
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"""
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def __init__(self, name, template_name):
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self.name = name
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self.template_name = template_name
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def get_exception_info(exception):
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"""
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Format exception information for display on the debug page using the
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structure described in the template API documentation.
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"""
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context_lines = 10
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lineno = exception.lineno
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source = exception.source
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if source is None:
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exception_file = Path(exception.filename)
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if exception_file.exists():
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with open(exception_file, 'r') as fp:
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source = fp.read()
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if source is not None:
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lines = list(enumerate(source.strip().split('\n'), start=1))
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during = lines[lineno - 1][1]
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total = len(lines)
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top = max(0, lineno - context_lines - 1)
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bottom = min(total, lineno + context_lines)
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else:
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during = ''
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lines = []
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total = top = bottom = 0
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return {
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'name': exception.filename,
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'message': exception.message,
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'source_lines': lines[top:bottom],
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'line': lineno,
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'before': '',
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'during': during,
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'after': '',
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'total': total,
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'top': top,
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'bottom': bottom,
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}
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