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"""Common code for graphical and text UIs.""" |
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from neovim.compat import IS_PYTHON3 |
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__all__ = ('Screen',) |
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if not IS_PYTHON3: |
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range = xrange # NOQA |
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class Cell(object): |
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def __init__(self): |
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self.text = ' ' |
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self.attrs = None |
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def __repr__(self): |
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return self.text |
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def get(self): |
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return self.text, self.attrs |
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def set(self, text, attrs): |
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self.text = text |
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self.attrs = attrs |
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def copy(self, other): |
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other.text = self.text |
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other.attrs = self.attrs |
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class Screen(object): |
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"""Store nvim screen state.""" |
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def __init__(self, columns, rows): |
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"""Initialize the Screen instance.""" |
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self.columns = columns |
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self.rows = rows |
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self.row = 0 |
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self.col = 0 |
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self.top = 0 |
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self.bot = rows - 1 |
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self.left = 0 |
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self.right = columns - 1 |
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self._cells = [[Cell() for c in range(columns)] for r in range(rows)] |
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def clear(self): |
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"""Clear the screen.""" |
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self._clear_region(self.top, self.bot, self.left, self.right) |
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def eol_clear(self): |
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"""Clear from the cursor position to the end of the scroll region.""" |
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self._clear_region(self.row, self.row, self.col, self.right) |
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def cursor_goto(self, row, col): |
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"""Change the virtual cursor position.""" |
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self.row = row |
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self.col = col |
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def set_scroll_region(self, top, bot, left, right): |
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"""Change scroll region.""" |
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self.top = top |
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self.bot = bot |
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self.left = left |
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self.right = right |
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68
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def scroll(self, count): |
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"""Shift scroll region.""" |
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top, bot = self.top, self.bot |
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left, right = self.left, self.right |
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if count > 0: |
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start = top |
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stop = bot - count + 1 |
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step = 1 |
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else: |
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start = bot |
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stop = top - count - 1 |
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step = -1 |
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# shift the cells |
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for row in range(start, stop, step): |
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target_row = self._cells[row] |
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source_row = self._cells[row + count] |
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for col in range(left, right + 1): |
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tgt = target_row[col] |
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source_row[col].copy(tgt) |
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# clear invalid cells |
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for row in range(stop, stop + count, step): |
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self._clear_region(row, row, left, right) |
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def put(self, text, attrs): |
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"""Put character on virtual cursor position.""" |
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cell = self._cells[self.row][self.col] |
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cell.set(text, attrs) |
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self.cursor_goto(self.row, self.col + 1) |
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def get_cell(self, row, col): |
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"""Get text, attrs at row, col.""" |
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return self._cells[row][col].get() |
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def get_cursor(self): |
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"""Get text, attrs at the virtual cursor position.""" |
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return self.get_cell(self.row, self.col) |
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def iter(self, startrow, endrow, startcol, endcol): |
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"""Extract text/attrs at row, startcol-endcol.""" |
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for row in range(startrow, endrow + 1): |
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r = self._cells[row] |
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cell = r[startcol] |
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curcol = startcol |
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attrs = cell.attrs |
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buf = [cell.text] |
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for col in range(startcol + 1, endcol + 1): |
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cell = r[col] |
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if cell.attrs != attrs or not cell.text: |
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yield row, curcol, ''.join(buf), attrs |
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attrs = cell.attrs |
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buf = [cell.text] |
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curcol = col |
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if not cell.text: |
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# glyph uses two cells, yield a separate entry |
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yield row, curcol, '', None |
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curcol += 1 |
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else: |
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buf.append(cell.text) |
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if buf: |
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yield row, curcol, ''.join(buf), attrs |
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129
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def _clear_region(self, top, bot, left, right): |
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for rownum in range(top, bot + 1): |
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row = self._cells[rownum] |
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for colnum in range(left, right + 1): |
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cell = row[colnum] |
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cell.set(' ', None) |
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timeyyy /
pytknvim
