Added printing requirements

reportlab/rl_config.py

@@ -0,0 +1,131 @@
+'''module that aggregates config information'''
+__all__=('_reset','register_reset')
+
+def _defaults_init():
+    '''
+    create & return defaults for all reportlab settings from
+    reportlab.rl_settings.py
+    reportlab.local_rl_settings.py
+    reportlab_settings.py or ~/.reportlab_settings
+
+    latter values override earlier
+    '''
+    from reportlab.lib.utils import rl_exec
+    import os
+
+    _DEFAULTS={}
+    rl_exec('from reportlab.rl_settings import *',_DEFAULTS)
+
+    _overrides=_DEFAULTS.copy()
+    try:
+        rl_exec('from reportlab.local_rl_settings import *',_overrides)
+        _DEFAULTS.update(_overrides)
+    except ImportError:
+        pass
+
+    _overrides=_DEFAULTS.copy()
+    try:
+        rl_exec('from reportlab_settings import *',_overrides)
+        _DEFAULTS.update(_overrides)
+    except ImportError:
+        _overrides=_DEFAULTS.copy()
+        try:
+            try:
+                fn = os.path.expanduser(os.path.join('~','.reportlab_settings'))    #appengine fails with ImportError
+            except ImportError:
+                fn = None
+            if fn:
+                with open(fn,'rb') as f:
+                    rl_exec(f.read(),_overrides)
+                _DEFAULTS.update(_overrides)
+        except:
+            pass
+    return _DEFAULTS
+
+_DEFAULTS=_defaults_init()
+
+_SAVED = {}
+sys_version=None
+
+#this is used to set the options from
+def _setOpt(name, value, conv=None):
+    '''set a module level value from environ/default'''
+    from os import environ
+    ename = 'RL_'+name
+    if ename in environ:
+        value = environ[ename]
+    if conv: value = conv(value)
+    globals()[name] = value
+
+def _startUp():
+    '''This function allows easy resetting to the global defaults
+    If the environment contains 'RL_xxx' then we use the value
+    else we use the given default'''
+    import os, sys
+    global sys_version, _unset_
+    sys_version = sys.version.split()[0]        #strip off the other garbage
+    from reportlab.lib import pagesizes
+    from reportlab.lib.utils import rl_isdir
+
+    if _SAVED=={}:
+        _unset_ = getattr(sys,'_rl_config__unset_',None)
+        if _unset_ is None:
+            class _unset_: pass
+            sys._rl_config__unset_ = _unset_ = _unset_()
+        global __all__
+        A = list(__all__)
+        for k,v in _DEFAULTS.items():
+            _SAVED[k] = globals()[k] = v
+            if k not in __all__:
+                A.append(k)
+        __all__ = tuple(A)
+
+    #places to search for Type 1 Font files
+    import reportlab
+    D = {'REPORTLAB_DIR': os.path.abspath(os.path.dirname(reportlab.__file__)),
+        'CWD': os.getcwd(),
+        'disk': os.getcwd().split(':')[0],
+        'sys_version': sys_version,
+        'XDG_DATA_HOME': os.environ.get('XDG_DATA_HOME','~/.local/share'),
+        }
+
+    for k in _SAVED:
+        if k.endswith('SearchPath'):
+            P=[]
+            for p in _SAVED[k]:
+                d = (p % D).replace('/',os.sep)
+                if '~' in d:
+                    try:
+                        d = os.path.expanduser(d)   #appengine fails with ImportError
+                    except ImportError:
+                        continue
+                if rl_isdir(d): P.append(d)
+            _setOpt(k,os.pathsep.join(P),lambda x:x.split(os.pathsep))
+            globals()[k] = list(filter(rl_isdir,globals()[k]))
+        else:
+            v = _SAVED[k]
+            if isinstance(v,(int,float)): conv = type(v)
+            elif k=='defaultPageSize': conv = lambda v,M=pagesizes: getattr(M,v)
+            else: conv = None
+            _setOpt(k,v,conv)
+
+_registered_resets=[]
+def register_reset(func):
+    '''register a function to be called by rl_config._reset'''
+    _registered_resets[:] = [x for x in _registered_resets if x()]
+    L = [x for x in _registered_resets if x() is func]
+    if L: return
+    from weakref import ref
+    _registered_resets.append(ref(func))
+
+def _reset():
+    '''attempt to reset reportlab and friends'''
+    _startUp()  #our reset
+    for f in _registered_resets[:]:
+        c = f()
+        if c:
+            c()
+        else:
+            _registered_resets.remove(f)
+
+_startUp()