51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
from joy.utils.stack import expression_to_string, iter_stack
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import core, text_viewer
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MAX_WIDTH = 64
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def fsi(item):
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'''Format Stack Item'''
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if isinstance(item, tuple):
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res = '[%s]' % expression_to_string(item)
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elif isinstance(item, str):
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res = '"%s"' % item
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else:
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assert not isinstance(item, unicode), repr(item)
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res = str(item)
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if len(res) > MAX_WIDTH:
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return res[:MAX_WIDTH - 3] + '...'
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return res
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class StackViewer(text_viewer.TextViewer):
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def __init__(self, surface):
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super(StackViewer, self).__init__(surface)
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self.stack_holder = None
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self.content_id = 'stack viewer'
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def _attach(self, display):
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if self.stack_holder:
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return
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om = core.OpenMessage(self, 'stack.pickle')
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display.broadcast(om)
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if om.status != core.SUCCESS:
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raise RuntimeError('stack unavailable')
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self.stack_holder = om.thing
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def _update(self):
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self.lines[:] = map(fsi, iter_stack(self.stack_holder[0])) or ['']
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def focus(self, display):
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self._attach(display)
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super(StackViewer, self).focus(display)
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def handle(self, message):
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if (isinstance(message, core.ModifyMessage)
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and message.subject is self.stack_holder
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):
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self._update()
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self.draw_body()
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