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93 lines
2.7 KiB
Python
93 lines
2.7 KiB
Python
# Register a gdb pretty printer for UGrid instances. Usage:
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#
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# - start gdb
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# - run `source contrib/gdb/nvim-gdb-pretty-printers.py`
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# - when a `UGrid` pointer can be evaluated in the current frame, just print
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# it's value normally: `p *grid` (assuming `grid` is the variable name
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# holding the pointer)
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# - highlighting can be activated by setting the NVIM_GDB_HIGHLIGHT_UGRID
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# environment variable(only xterm-compatible terminals supported). This
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# can be done while gdb is running through the python interface:
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# `python os.environ['NVIM_GDB_HIGHLIGHT_UGRID'] = '1'`
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import os
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import gdb
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import gdb.printing
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SGR0 = '\x1b(B\x1b[m'
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def get_color_code(bg, color_num):
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if color_num < 16:
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prefix = 3
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if color_num > 7:
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prefix = 9
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if bg:
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prefix += 1
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color_num %= 8
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else:
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prefix = '48;5;' if bg else '38;5;'
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return '\x1b[{0}{1}m'.format(prefix, color_num)
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def highlight(attrs):
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fg, bg = [int(attrs['foreground']), int(attrs['background'])]
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rv = [SGR0] # start with sgr0
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if fg != -1:
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rv.append(get_color_code(False, fg))
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if bg != -1:
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rv.append(get_color_code(True, bg))
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if bool(attrs['bold']):
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rv.append('\x1b[1m')
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if bool(attrs['italic']):
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rv.append('\x1b[3m')
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if bool(attrs['undercurl']) or bool(attrs['underline']):
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rv.append('\x1b[4m')
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if bool(attrs['reverse']):
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rv.append('\x1b[7m')
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return ''.join(rv)
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class UGridPrinter(object):
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def __init__(self, val):
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self.val = val
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def to_string(self):
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do_hl = (os.getenv('NVIM_GDB_HIGHLIGHT_UGRID') and
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os.getenv('NVIM_GDB_HIGHLIGHT_UGRID') != '0')
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grid = self.val
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height = int(grid['height'])
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width = int(grid['width'])
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delimiter = '-' * (width + 2)
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rows = [delimiter]
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for row in range(height):
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cols = []
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if do_hl:
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cols.append(SGR0)
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curhl = None
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for col in range(width):
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cell = grid['cells'][row][col]
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if do_hl:
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hl = highlight(cell['attrs'])
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if hl != curhl:
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cols.append(hl)
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curhl = hl
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cols.append(cell['data'].string('utf-8'))
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if do_hl:
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cols.append(SGR0)
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rows.append('|' + ''.join(cols) + '|')
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rows.append(delimiter)
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return '\n' + '\n'.join(rows)
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def display_hint(self):
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return 'hint'
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def pretty_printers():
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pp = gdb.printing.RegexpCollectionPrettyPrinter('nvim')
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pp.add_printer('UGrid', '^ugrid$', UGridPrinter)
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return pp
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gdb.printing.register_pretty_printer(gdb, pretty_printers(), replace=True)
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