290 lines
10 KiB
Python
290 lines
10 KiB
Python
import sys
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import lex2
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color_list = []
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color_list.extend(['\033[3%dm' % x for x in range(0, 8)])
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color_list.extend(['\033[3%d;1m' % x for x in range(0, 8)])
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color_list.extend(['\033[0m'])
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color_names = [
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'black', 'dred', 'dgreen', 'brown', 'dblue', 'dpurple', 'dcyan', 'lgrey',
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'dgrey', 'lred', 'lgreen', 'yellow', 'lblue', 'lpurple', 'lcyan', 'white',
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'unset',
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]
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color_dict ={}
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for i in range(0, len(color_list)):
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color_dict[color_names[i]] = color_list[i]
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class Highlighter:
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def __init__(self, lexer):
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self.lexer = lexer
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self.tokens = []
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self.line_contexts = {}
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def dump(self, fmt='(%3s, %2s) | %s'):
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print fmt % ('y', 'x', 'string')
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for i in range(0, len(self.tokens)):
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group = self.tokens[i]
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print 'LINE %d' % i
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for token in group:
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print fmt % (token.y, token.x, token.string)
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def display(self, token_colors={}, debug=False):
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for group in self.tokens:
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for token in group:
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color_name = None
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name_parts = token.name.split('.')
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for i in range(0, len(name_parts)):
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if '.'.join(name_parts[i:]) in token_colors:
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color_name = token_colors['.'.join(name_parts[i:])]
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break
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if color_name is not None:
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sys.stdout.write(color_dict[color_name])
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pass
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elif debug:
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raise Exception, "no highlighting for %r" % token.name
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else:
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color_name = 'white'
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sys.stdout.write(color_dict[color_name])
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sys.stdout.write(token.string)
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sys.stdout.write('\n')
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def highlight(self, lines):
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self.tokens = [[] for l in lines]
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self.lexer.lex(lines, y=0, x=0)
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for token in self.lexer:
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self.tokens[token.y].append(token)
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self.line_contexts = dict(self.lexer.line_contexts)
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# relexing
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# ======================
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def relex(self, lines, y1, x1, y2, x2):
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# start the relexing process
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#self.lexer.lex(lines, y1, 0)
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rulecontexts = self.line_contexts[y1]
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self.lexer.resume(lines, y1, 0, rulecontexts)
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# these keep track of the current y coordinate, the current token index
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# on line[y], and the current "new token", respectively.
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y = y1
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i = 0
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getnext = True
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new_token = None
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while True:
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# if we have overstepped our bounds, then exit!
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if y >= len(lines):
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break
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# if we need another new_token, then try to get it.
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if getnext:
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try:
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new_token = self.lexer.next()
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getnext = False
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except StopIteration:
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# ok, so this means that ALL the rest of the tokens didn't
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# show up, because we're done. so delete them and exit
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for j in range(y, len(lines)):
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del self.tokens[j][i:]
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i = 0
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break
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# if our next token is one a future line, we need to just get rid of
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# all our old tokens until we get there
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while new_token.y > y:
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del self.tokens[y][i:]
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i = 0
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y += 1
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# ok, so see if we have current tokens on this line; if so get it
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if i < len(self.tokens[y]):
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old_token = self.tokens[y][i]
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assert old_token.y == y, "%d == %d" % (old_token.y, y)
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else:
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old_token = None
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if old_token is None:
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# since we don't have a previous token at this location, just
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# insert the new one
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self.tokens[y].insert(i, new_token)
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i += 1
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getnext = True
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elif '.' not in old_token.name and old_token == new_token:
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# if they match, then leave the old one alone
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i += 1
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getnext = True
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if new_token.y >= y2 and new_token.end_x() >= x2:
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# in this case, we can (probably) assume that the rest of
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# the lines will lex the same way
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break
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elif old_token.x < new_token.end_x():
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# ok, so we haven't gotten to this new token yet. obviously
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# this token never showed up in the new lexing, so delete it.
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del self.tokens[y][i]
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elif old_token.x >= new_token.end_x():
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# ok, this token is further out, so just insert the new token
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# ahead of it, move our counter out and continue
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self.tokens[y].insert(i, new_token)
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i += 1
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getnext = True
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else:
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# this should never happen
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raise Exception, "this isn't happening"
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# deletion
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# ======================
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def update_del(self, lines, y1, x1, y2, x2):
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assert y1 >= 0
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assert y1 <= y2
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assert y2 < len(lines)
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xdelta = x2 - x1
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ydelta = y2 - y1
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# construct a new token data structure; it will have one list for
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# every y index in lines. also, fill in tokens before the change
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newtokens = [[] for x in lines]
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for y in range(0, y1):
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newtokens[y] = self.tokens[y]
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# so for each line we currently have, we need to process every token,
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# transferring them from the old structure to the new, and modifying
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# them appropriately to take the change into account.
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for y in range(y1, len(self.tokens)):
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while self.tokens[y]:
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# so remove the token from the old structure, and figure out
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# where it stands in relation to the deletion
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token = self.tokens[y].pop(0)
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tx1 = token.x
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tx2 = token.x + len(token.string)
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# the notation "*|*| " refers to what the text spans, i.e.:
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# before|during|after the deletion
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if (y, tx2) <= (y1, x1):
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# *| |
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newtokens[y].append(token)
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elif (y, tx1) >= (y2, x2):
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# | |*
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token.y -= ydelta
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if y == y2:
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token.x -= xdelta
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newtokens[token.y].append(token)
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elif (y, tx1) < (y1, x1):
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if (y, tx2) <= (y2, x2):
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# *|*|
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token.string = token.string[:x1 - tx1]
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else:
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# *|*|*
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token.string = token.string[:x1 - tx1] + token.string[x2 - tx1:]
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newtokens[y].append(token)
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elif (y, tx1) < (y2, x2):
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if (y, tx2) <= (y2, x2):
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# |*|
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pass
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else:
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# |*|*
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token.x = x1
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token.y -= ydelta
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token.string = token.string[x2 - tx1:]
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newtokens[token.y].append(token)
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else:
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raise Exception, "this should never happen: %r" % token
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# ok, now that we have built a correct new structure, store a reference
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# to it instead.
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self.tokens = newtokens
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def relex_del(self, lines, y1, x1, y2, x2):
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# first let's update our existing tokens to fix their offsets, etc.
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self.update_del(lines, y1, x1, y2, x2)
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# then let's do some relexing
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self.relex(lines, y1, x1, y2, x2)
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# addition
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# ======================
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def update_add(self, lines, y1, x1, newlines):
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assert y1 >= 0
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assert len(newlines) > 0
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y2 = y1 + len(newlines) - 1
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if y2 == y1:
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x2 = x1 + len(newlines[0])
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else:
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x2 = len(newlines[-1])
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xdelta = x2 - x1
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ydelta = y2 - y1
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# construct a new token data structure, with the right number of lines
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newtokens = []
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for i in range(0, len(self.tokens) + ydelta):
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newtokens.append([])
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# copy the tokens that show up before the changed line
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for y in range(0, y1):
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newtokens[y] = self.tokens[y]
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# process the tokens that show up on the changed line
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post_change_list = []
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for t in self.tokens[y1]:
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tx1 = t.x
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tx2 = t.x + len(t.string)
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ty = t.y
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ts = t.string
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if tx2 <= x1:
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# '*| ' before the insertion
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newtokens[y1].append(t)
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elif tx1 >= x1:
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# ' |*' after the insertion
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t.x += xdelta
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t.y = y2
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post_change_list.append(t)
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else:
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# '*|*' around the insertion
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t1 = t.copy()
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t1.string = t.string[:x1 - tx1]
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newtokens[y1].append(t1)
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t2 = t.copy()
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t2.string = t.string[x1 - tx1:]
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t2.x = x2
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t2.y = y2
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post_change_list.append(t2)
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# add in the new data
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newtokens[y1].append(lex2.Token('new', '', y1, x1, newlines[0]))
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for i in range(1, len(newlines)):
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yi = y1 + i
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newtokens[yi].append(lex2.Token('new', '', yi, 0, newlines[i]))
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# add the post-change tokens back
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for t in post_change_list:
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newtokens[y2].append(t)
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# for each subsequent line, fix it's tokens' y coordinates
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for y in range(y1 + 1, len(self.tokens)):
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for t in self.tokens[y]:
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t.y += ydelta
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newtokens[t.y].append(t)
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# ok, now that we have built a correct new structure, store a reference
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# to it instead.
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self.tokens = newtokens
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def relex_add(self, lines, y1, x1, newlines):
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# first let's update our existing tokens to fix their offsets, etc.
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self.update_add(lines, y1, x1, newlines)
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# create some extra info that we need
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y2 = y1 + len(newlines) - 1
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if y2 == y1:
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x2 = x1 + len(newlines[0])
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else:
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x2 = len(newlines[-1])
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# now let's start the relexing process
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self.relex(lines, y1, x1, y2, x2)
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