Mercurial > piecrust2

annotate piecrust/environment.py @ 535:03c3a77fda60 2.0.0b2

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prepare: More help about scaffolding.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 29 Jul 2015 09:13:54 -0700
parents cb3446be44b7
children 81d9c3a3a0b5
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1 import time
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2 import logging
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3 import contextlib
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4 from piecrust.cache import MemCache
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7 logger = logging.getLogger(__name__)
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10 class AbortedSourceUseError(Exception):
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11 pass
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14 class ExecutionInfo(object):
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15 def __init__(self, page, render_ctx):
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16 self.page = page
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17 self.render_ctx = render_ctx
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18 self.was_cache_valid = False
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19 self.start_time = time.perf_counter()
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21
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22 class ExecutionInfoStack(object):
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23 def __init__(self):
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24 self._page_stack = []
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26 @property
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27 def current_page_info(self):
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28 if len(self._page_stack) == 0:
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29 return None
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30 return self._page_stack[-1]
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32 @property
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33 def is_main_page(self):
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34 return len(self._page_stack) == 1
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35
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36 def hasPage(self, page):
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37 for ei in self._page_stack:
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38 if ei.page == page:
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39 return True
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40 return False
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41
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42 def pushPage(self, page, render_ctx):
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43 if len(self._page_stack) > 0:
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44 top = self._page_stack[-1]
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45 assert top.page is not page
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46 self._page_stack.append(ExecutionInfo(page, render_ctx))
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47
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48 def popPage(self):
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49 del self._page_stack[-1]
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50
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51 def clear(self):
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52 self._page_stack = []
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53
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55 class Environment(object):
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56 def __init__(self):
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57 self.app = None
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58 self.start_time = None
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59 self.exec_info_stack = ExecutionInfoStack()
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60 self.was_cache_cleaned = False
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61 self.base_asset_url_format = '%uri%'
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62 self.page_repository = MemCache()
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63 self.rendered_segments_repository = MemCache()
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64 self.fs_caches = {
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65 'renders': self.rendered_segments_repository}
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66 self.fs_cache_only_for_main_page = False
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67 self.abort_source_use = False
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68 self._default_layout_extensions = None
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69 self._timers = {}
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71 @property
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72 def default_layout_extensions(self):
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73 if self._default_layout_extensions is not None:
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74 return self._default_layout_extensions
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75
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76 if self.app is None:
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77 raise Exception("This environment has not been initialized yet.")
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78
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79 from piecrust.rendering import get_template_engine
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80 dte = get_template_engine(self.app, None)
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81 self._default_layout_extensions = ['.' + e.lstrip('.')
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82 for e in dte.EXTENSIONS]
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83 return self._default_layout_extensions
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84
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85 def initialize(self, app):
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86 self.app = app
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87 self.start_time = time.perf_counter()
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88 self.exec_info_stack.clear()
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89 self.was_cache_cleaned = False
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90 self.base_asset_url_format = '%uri%'
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91
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92 self._onSubCacheDirChanged(app)
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93
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94 def registerTimer(self, category, *, raise_if_registered=True):
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95 if raise_if_registered and category in self._timers:
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96 raise Exception("Timer '%s' has already been registered." %
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97 category)
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98 self._timers[category] = 0
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99
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100 @contextlib.contextmanager
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101 def timerScope(self, category):
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102 start = time.perf_counter()
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103 yield
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104 self._timers[category] += time.perf_counter() - start
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105
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106 def stepTimer(self, category, value):
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107 self._timers[category] += value
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108
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109 def stepTimerSince(self, category, since):
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110 self.stepTimer(category, time.perf_counter() - since)
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111
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112 def _onSubCacheDirChanged(self, app):
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113 for name, repo in self.fs_caches.items():
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114 cache = app.cache.getCache(name)
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115 repo.fs_cache = cache
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117
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118 class StandardEnvironment(Environment):
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119 def __init__(self):
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120 super(StandardEnvironment, self).__init__()
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121