112 lines
2.6 KiB
Ruby
112 lines
2.6 KiB
Ruby
#--
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# Copyright (C) 2006 Andrea Censi <andrea (at) rubyforge.org>
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#
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# This file is part of Maruku.
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#
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# Maruku is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Maruku is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Maruku; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#++
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module MaRuKu; module In; module Markdown; module BlockLevelParser
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# This represents a source of lines that can be consumed.
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#
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# It is the twin of CharSource.
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#
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class LineSource
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include MaRuKu::Strings
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def initialize(lines, parent=nil, parent_offset=nil)
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raise "NIL lines? " if not lines
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@lines = lines
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@lines_index = 0
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@parent = parent
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@parent_offset = parent_offset
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end
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def cur_line() @lines[@lines_index] end
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def next_line() @lines[@lines_index+1] end
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def shift_line()
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raise "Over the rainbow" if @lines_index >= @lines.size
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l = @lines[@lines_index]
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@lines_index += 1
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return l
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end
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def ignore_line
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raise "Over the rainbow" if @lines_index >= @lines.size
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@lines_index += 1
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end
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def describe
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#s = "At line ##{@lines_index} of #{@lines.size}:\n"
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s = "At line #{original_line_number(@lines_index)}\n"
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context = 3 # lines
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from = [@lines_index-context, 0].max
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to = [@lines_index+context, @lines.size-1].min
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for i in from..to
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prefix = (i == @lines_index) ? '--> ' : ' ';
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l = @lines[i]
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s += "%10s %4s|#{l}" %
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[@lines[i].md_type.to_s, prefix]
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s += "|\n"
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end
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# if @parent
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# s << "Parent context is: \n"
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# s << add_tabs(@parent.describe,1,'|')
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# end
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s
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end
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def original_line_number(index)
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if @parent
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return index + @parent.original_line_number(@parent_offset)
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else
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1 + index
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end
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end
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def cur_index
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@lines_index
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end
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# Returns the type of next line as a string
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# breaks at first :definition
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def tell_me_the_future
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s = ""; num_e = 0;
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for i in @lines_index..@lines.size-1
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c = case @lines[i].md_type
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when :text; "t"
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when :empty; num_e+=1; "e"
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when :definition; "d"
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else "o"
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end
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s += c
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break if c == "d" or num_e>1
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end
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s
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end
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end # linesource
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end end end end # block
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