518 lines
17 KiB
Python
518 lines
17 KiB
Python
import os.path, string
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import regex
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from point2 import Point
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WORD_LETTERS = list(string.letters + string.digits)
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# note about the cursor: the cursor position will insert in front of the
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# character it highlights. to this end, it needs to be able to highlight behind
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# the last character on a line. thus, the x coordinate of the (logical) cursor
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# can equal the length of lines[y], even though lines[y][x] throws an index
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# error. both buffer and window need to be aware of this possibility for points.
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class Window(object):
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def __init__(self, b, a, height=24, width=80, mode_name=None):
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self.buffer = b
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self.application = a
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self.first = Point(0, 0)
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self.last = None
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self.cursor = Point(0, 0)
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self.mark = None
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self.active_point = None
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self.height = height
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self.width = width
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self.input_line = ""
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if mode_name is not None:
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pass
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elif hasattr(self.buffer, 'modename') and self.buffer.modename is not None:
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mode_name = self.buffer.modename
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elif self.buffer.name() == "*Minibuffer*":
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mode_name = 'mini'
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elif self.buffer.name() == "*Console*":
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mode_name = "fundamental"
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elif hasattr(self.buffer, 'path'):
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path = self.buffer.path
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basename = os.path.basename(path)
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ext = self._get_path_ext(path)
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if path in self.application.mode_paths:
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mode_name = self.application.mode_paths[path]
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elif basename in self.application.mode_basenames:
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mode_name = self.application.mode_basenames[basename]
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elif ext in self.application.mode_extensions:
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mode_name = self.application.mode_extensions[ext]
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elif len(self.buffer.lines) > 0 and \
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self.buffer.lines[0].startswith('#!'):
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line = self.buffer.lines[0]
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for word in self.application.mode_detection:
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if word in line:
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mode_name = self.application.mode_detection[word]
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if mode_name is None:
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mode_name = "fundamental"
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m = self.application.modes[mode_name](self)
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self.set_mode(m)
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self.buffer.add_window(self)
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# private method used in window constructor
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def _get_path_ext(self, path):
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name = os.path.basename(path).lower()
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tokens = name.split('.')
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if len(tokens) > 2 and tokens[-1] in ('gz', 'in', 'zip'):
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return '.%s.%s' % (tokens[-2], tokens[-1])
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else:
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return os.path.splitext(path)[1].lower()
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# mode stuff
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def set_mode(self, m):
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self.mode = m
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#self.redraw()
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def get_highlighter(self):
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if self.mode.lexer is None:
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return None
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else:
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return self.buffer.highlights[self.mode.name()]
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# this is used to temporarily draw the user's attention to another point
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def set_active_point(self, p, msg='marking on line %(y)d, character %(x)d'):
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self.active_point = p
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if not self.point_is_visible(p):
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self.application.set_error(msg % {'x': p.x, 'y': p.y})
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# point left
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def point_left(self, p):
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if p.y == 0 and p.x == 0:
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return None
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elif p.x == 0:
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return Point(len(self.buffer.lines[p.y - 1]), p.y - 1)
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else:
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return Point(p.x - 1, p.y)
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# point right
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def point_right(self, p):
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if p.y == len(self.buffer.lines)-1 and p.x == len(self.buffer.lines[-1]):
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return None
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elif p.x == len(self.buffer.lines[p.y]):
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return Point(0, p.y + 1)
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else:
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return Point(p.x + 1, p.y)
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# cursors
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def logical_cursor(self):
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if len(self.buffer.lines) > self.cursor.y:
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l = len(self.buffer.lines[self.cursor.y])
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else:
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l = 0
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x = min(self.cursor.x, l)
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return Point(x, self.cursor.y)
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# last visible point
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def _calc_last(self):
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(x, y) = self.first.xy()
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count = 0
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while count < self.height - 1 and y < len(self.buffer.lines):
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line = self.buffer.lines[y]
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if x >= len(line) or len(line[x:]) <= self.width:
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x = 0
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y += 1
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count += 1
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else:
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count += 1
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x += self.width
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if y < len(self.buffer.lines):
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x = min(x + self.width, len(self.buffer.lines[y]))
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self.last = Point(x, y)
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# redrawing
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def redraw(self):
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self._calc_last()
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def set_size(self, width, height):
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assert type(width) == type(0), width
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assert type(height) == type(0), height
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self.width = width
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self.height = height
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self.redraw()
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# region added
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def region_added(self, p, newlines):
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(x, y) = self.logical_cursor().xy()
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l = len(newlines)
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assert l > 0, repr(newlines)
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if l > 1:
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if y > p.y:
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self.cursor = Point(x, y + l - 1)
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elif y == p.y and x >= p.x:
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self.cursor = Point(len(newlines[-1]) + x - p.x, y + l - 1)
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elif y == p.y and x >= p.x:
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self.cursor = Point(x + len(newlines[0]), y)
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self.assure_visible_cursor()
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# region removed
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def region_removed(self, p1, p2):
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cursor = self.logical_cursor()
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(x, y) = cursor.xy()
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if cursor < p1:
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pass
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elif cursor < p2:
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self.cursor = p1
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elif cursor.y == p2.y:
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self.cursor = Point(self.cursor.x - p2.x + p1.x, p1.y)
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else:
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self.cursor = Point(self.cursor.x, self.cursor.y - p2.y + p1.y)
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self.assure_visible_cursor()
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def point_is_visible(self, p):
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return self.first <= p and p <= self.last
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def cursor_is_visible(self):
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return self.point_is_visible(self.logical_cursor())
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def first_is_visible(self):
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return self.point_is_visible(self.buffer.get_buffer_start())
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def last_is_visible(self):
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return self.point_is_visible(self.buffer.get_buffer_end())
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def center_view(self):
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(x, y) = self.logical_cursor().xy()
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counter = 0
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while counter < self.height / 2:
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if x > self.width:
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x -= self.width
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elif y > 0:
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y -= 1
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x = len(self.buffer.lines[y])
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else:
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(x, y) = (0, 0)
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break
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counter += 1
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self.first = Point(x - (x % self.width), y)
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self.redraw()
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def assure_visible_cursor(self):
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if not self.cursor_is_visible():
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self.center_view()
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# moving in buffer
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def forward(self):
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cursor = self.logical_cursor()
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if cursor.x < len(self.buffer.lines[cursor.y]):
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self.cursor = Point(cursor.x + 1, cursor.y)
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elif cursor.y < len(self.buffer.lines) -1:
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self.cursor = Point(0, cursor.y + 1)
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self.assure_visible_cursor()
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def backward(self):
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cursor = self.logical_cursor()
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if cursor.x > 0:
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self.cursor = Point(cursor.x - 1, cursor.y)
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elif cursor.y > 0:
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self.cursor = Point(len(self.buffer.lines[cursor.y - 1]), cursor.y - 1)
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self.assure_visible_cursor()
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def end_of_line(self):
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cursor = self.logical_cursor()
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self.cursor = Point(len(self.buffer.lines[cursor.y]), cursor.y)
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self.assure_visible_cursor()
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def start_of_line(self):
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cursor = self.logical_cursor()
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self.cursor = Point(0, cursor.y)
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self.assure_visible_cursor()
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def previous_line(self):
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cursor = self.logical_cursor()
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if cursor.y > 0:
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self.cursor = Point(cursor.x, cursor.y - 1)
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self.assure_visible_cursor()
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def next_line(self):
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cursor = self.logical_cursor()
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if cursor.y < len(self.buffer.lines) - 1:
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self.cursor = Point(cursor.x, cursor.y + 1)
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self.assure_visible_cursor()
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# word handling
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def find_left_word(self, p=None):
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if p is None:
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(x, y) = self.logical_cursor().xy()
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else:
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(x, y) = p.xy()
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start = self.buffer.get_buffer_start()
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if (x, y) == start:
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return
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elif x == 0:
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y -= 1
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x = len(self.buffer.lines[y])
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else:
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x -= 1
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while (y, x) >= start and self.xy_char(x, y) not in WORD_LETTERS:
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if x == 0:
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y -= 1
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x = len(self.buffer.lines[y])
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else:
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x -= 1
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found_word = False
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while (y, x) >= start and self.xy_char(x, y) in WORD_LETTERS:
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found_word = True
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if x == 0:
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y -= 1
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x = len(self.buffer.lines[y])
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else:
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x -= 1
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if not found_word:
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return None
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elif x == len(self.buffer.lines[y]):
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x = 0
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y += 1
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else:
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x += 1
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return Point(x, y)
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def find_right_word(self, p=None):
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if p is None:
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(x, y) = self.logical_cursor().xy()
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else:
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(x, y) = p.xy()
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end = self.buffer.get_buffer_end()
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while (y, x) < end and self.xy_char(x, y) not in WORD_LETTERS:
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if x == len(self.buffer.lines[y]):
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x = 0
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y += 1
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else:
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x += 1
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while (y, x) < end and self.xy_char(x, y) in WORD_LETTERS:
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if x == len(self.buffer.lines[y]):
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x = 0
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y += 1
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else:
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x += 1
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return Point(x, y)
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def left_word(self):
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p = self.find_left_word()
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if p is not None:
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self.goto(p)
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def right_word(self):
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p = self.find_right_word()
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if p is not None:
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self.goto(p)
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def get_word_bounds_at_point(self, p):
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if len(self.buffer.lines[p.y]) == 0:
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return
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elif p.x == 0:
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p1 = self.find_left_word(Point(p.x + 1, p.y))
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p2 = self.find_right_word()
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else:
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p1 = self.find_left_word()
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p2 = self.find_right_word(Point(p.x - 1, p.y))
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return (p1, p2)
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def get_word_at_point(self, p):
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bounds = self.get_word_bounds_at_point(p)
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if bounds is None:
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return None
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else:
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return self.buffer.get_substring(bounds[0], bounds[1])
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def get_word_bounds(self):
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return self.get_word_bounds_at_point(self.logical_cursor())
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def get_word(self):
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return self.get_word_at_point(self.logical_cursor())
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# page up/down
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def _pshift_up(self, p, num):
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(x, y) = p.xy()
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orig_x = x
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counter = 0
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while counter < num and y > 0:
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if x > self.width:
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x -= self.width
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else:
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y -= 1
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x = len(self.buffer.lines[y])
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counter += 1
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return Point(orig_x, y)
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def _pshift_down(self, p, num):
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(x, y) = p.xy()
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orig_x = x
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counter = 0
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while counter < num and y < len(self.buffer.lines):
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if x + self.width >= len(self.buffer.lines[y]):
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y += 1
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x = 0
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else:
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x += self.width
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counter += 1
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return Point(orig_x, y)
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def page_up(self):
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first_point = self.buffer.get_buffer_start()
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if self.point_is_visible(first_point):
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self.goto_beginning()
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return
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self.cursor = self._pshift_up(self.cursor, self.height - 3)
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if self.first > first_point:
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self.first = self._pshift_up(self.first, self.height - 3)
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self.redraw()
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def page_down(self):
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last_point = self.buffer.get_buffer_end()
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if self.point_is_visible(last_point):
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self.goto_end()
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return
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self.cursor = self._pshift_down(self.cursor, self.height - 3)
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if self.last < last_point:
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self.first = self._pshift_down(self.first, self.height - 3)
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self.redraw()
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# jumping in buffer
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def goto(self, p):
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self.cursor = p
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self.assure_visible_cursor()
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def goto_line(self, n):
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assert n > 0 and n <= len(self.buffer.lines) , "illegal line: %d" % n
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self.cursor = Point(0, n - 1)
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self.assure_visible_cursor()
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def forward_lines(self, n):
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assert n > 0, "illegal number of lines: %d" % n
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y = min(self.logical_cursor().y + n, len(self.buffer.lines) - 1)
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self.goto(Point(0, y))
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def forward_chars(self, n):
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(x, y) = self.logical_cursor().xy()
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for i in range(0, n):
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if x == len(self.buffer.lines[y]):
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y += 1
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x = 0
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if y >= len(self.buffer.lines):
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break
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else:
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x += 1
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self.goto(Point(x, y))
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def goto_char(self, n):
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self.goto_beginning()
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self.forward_chars(n)
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def goto_beginning(self):
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self.cursor = Point(0, 0)
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self.assure_visible_cursor()
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def goto_end(self):
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self.cursor = self.buffer.get_buffer_end()
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self.assure_visible_cursor()
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# mark manipulation
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def set_mark_point(self, p):
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self.mark = p
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def set_mark(self):
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self.set_mark_point(self.logical_cursor())
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self.application.set_error("Mark set")
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def goto_mark(self):
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self.goto(self.mark)
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def switch_mark(self):
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if self.mark:
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p = self.mark
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self.set_mark_point(self.logical_cursor())
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self.goto(p)
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# deletion
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def left_delete(self):
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(x, y) = self.logical_cursor().xy()
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if x > 0:
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self.buffer.delete_char(Point(x - 1, y))
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elif y > 0:
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self.buffer.delete_char(Point(len(self.buffer.lines[y - 1]), y - 1))
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def right_delete(self):
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cursor = self.logical_cursor()
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if cursor < self.last:
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self.buffer.delete_char(cursor)
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else:
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pass
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# killing
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def kill_line(self):
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return self.copy_line(kill=True)
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def kill_region(self):
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return self.copy_region(kill=True)
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def kill_left_word(self):
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p1 = self.find_left_word()
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p2 = self.logical_cursor()
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if p1 == p2:
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return
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return self.kill(p1, p2)
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def kill_right_word(self):
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p1 = self.logical_cursor()
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p2 = self.find_right_word()
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if p1 == p2:
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return
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return self.kill(p1, p2)
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def copy_line(self, kill=False):
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cursor = self.logical_cursor()
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(x, y) = cursor.xy()
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lines = self.buffer.lines
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if (x < len(lines[y]) and not regex.whitespace.match(lines[y][x:])):
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limit = Point(len(lines[y]), y)
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elif y < len(lines) - 1:
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limit = Point(0, y + 1)
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else:
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return
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if kill:
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return self.kill(cursor, limit)
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else:
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return self.copy(cursor, limit)
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def copy_region(self, kill=False):
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cursor = self.logical_cursor()
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if cursor < self.mark:
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p1 = cursor
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p2 = self.mark
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elif self.mark < cursor:
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p1 = self.mark
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p2 = cursor
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else:
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self.input_line = "Empty kill region"
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return
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if kill:
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return self.kill(p1, p2)
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else:
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return self.copy(p1, p2)
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def kill(self, p1, p2):
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killed = self.buffer.get_substring(p1, p2)
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self.buffer.delete(p1, p2)
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self.application.push_kill(killed)
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return killed
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def copy(self, p1, p2):
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copied = self.buffer.get_substring(p1, p2)
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self.application.push_kill(copied)
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return copied
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# insertion
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def insert_string_at_cursor(self, s):
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self.insert_string(self.logical_cursor(), s)
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def insert_string(self, p, s):
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lines = s.split('\n')
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self.insert_lines(p, lines)
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def insert_lines_at_cursor(self, lines):
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self.insert_lines(self.logical_cursor(), lines)
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def insert_lines(self, p, lines):
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self.buffer.insert_lines(p, lines)
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self.redraw()
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# yank/pop
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def yank(self):
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self.insert_string_at_cursor(self.application.get_kill())
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def pop_kill(self):
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return self.application.pop_kill()
|
|
|
|
# querying
|
|
def cursor_char(self):
|
|
self.point_char(self.logical_cursor())
|
|
def point_char(self, p):
|
|
return self.xy_char(p.x, p.y)
|
|
def xy_char(self, x, y):
|
|
#assert 0 <= y and y < len(self.buffer.lines)
|
|
#assert 0 <= x and x <= len(self.buffer.lines[y])
|
|
if x == len(self.buffer.lines[y]):
|
|
return "\n"
|
|
else:
|
|
return self.buffer.lines[y][x]
|
|
|
|
# undo/redo
|
|
# XYZ
|
|
def undo(self):
|
|
# TODO: put something here to move the cursor to the area of the undo
|
|
self.buffer.undo()
|
|
def redo(self):
|
|
# TODO: put something here to move the cursor to the area of the redo
|
|
self.buffer.redo()
|