Class: ERB::Compiler::TrimScanner

Inherits:
Scanner
  • Object
show all
Defined in:
lib/erb.rb

Overview

:nodoc:

Constant Summary collapse

ExplicitTrimRegexp = 
/(^[ \t]*<%-)|(-%>\n?\z)|(<%-)|(-%>)|(<%%)|(%%>)|(<%=)|(<%#)|(<%)|(%>)|(\n)/
ERB_STAG = 
%w(<%= <%# <%)

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Scanner

default_scanner=, make_scanner, regist_scanner

Constructor Details

#initialize(src, trim_mode, percent) ⇒ TrimScanner

Returns a new instance of TrimScanner.



288
289
290
291
292
293
294
295
296
297
298
299
300
301
 
# File 'lib/erb.rb', line 288

def initialize(src, trim_mode, percent)
	super
	@trim_mode = trim_mode
	@percent = percent
	if @trim_mode == '>'
	  @scan_line = self.method(:trim_line1)
	elsif @trim_mode == '<>'
	  @scan_line = self.method(:trim_line2)
	elsif @trim_mode == '-'
	  @scan_line = self.method(:explicit_trim_line)
	else
	  @scan_line = self.method(:scan_line)
	end
end

Instance Attribute Details

#stag ⇒ Object

Returns the value of attribute stag.



302
303
304
 
# File 'lib/erb.rb', line 302

def stag
  @stag
end

Instance Method Details

#explicit_trim_line(line) ⇒ Object 



373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
 
# File 'lib/erb.rb', line 373

def explicit_trim_line(line)
	line.split(ExplicitTrimRegexp).each do |token|
	  next if token.empty?
	  if @stag.nil? && /[ \t]*<%-/ =~ token
	    yield('<%')
	  elsif @stag && /-%>\n/ =~ token
	    yield('%>')
	    yield(:cr)
	  elsif @stag && token == '-%>'
	    yield('%>')
	  else
	    yield(token)
	  end
	end
end

#is_erb_stag?(s) ⇒ Boolean

Returns:

  • (Boolean) 


390
391
392
 
# File 'lib/erb.rb', line 390

def is_erb_stag?(s)
	ERB_STAG.member?(s)
end

#percent_line(line, &block) ⇒ Object 



316
317
318
319
320
321
322
323
324
325
326
327
 
# File 'lib/erb.rb', line 316

def percent_line(line, &block)
	if @stag || line[0] != ?%
	  return @scan_line.call(line, &block)
	end

	line[0] = ''
	if line[0] == ?%
	  @scan_line.call(line, &block)
	else
    yield(PercentLine.new(line.chomp))
	end
end

#scan(&block) ⇒ Object 



304
305
306
307
308
309
310
311
312
313
314
 
# File 'lib/erb.rb', line 304

def scan(&block)
	@stag = nil
	if @percent
	  @src.each do |line|
	    percent_line(line, &block)
	  end
	else
    @scan_line.call(@src, &block)
	end
	nil
end

#scan_line(line) ⇒ Object 



329
330
331
332
333
334
 
# File 'lib/erb.rb', line 329

def scan_line(line)
  line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |token|
	  next if token.empty?
	  yield(token)
	end
end

#trim_line1(line) ⇒ Object 



336
337
338
339
340
341
342
343
344
345
346
347
348
 
# File 'lib/erb.rb', line 336

def trim_line1(line)
  line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
    tokens.each do |token|
	  next if token.empty?
      if token == "%>\n"
        yield('%>')
        yield(:cr)
      else
        yield(token)
      end
    end
	end
end

#trim_line2(line) ⇒ Object 



350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
 
# File 'lib/erb.rb', line 350

def trim_line2(line)
	head = nil
  line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
    tokens.each do |token|
      next if token.empty?
      head = token unless head
      if token == "%>\n"
        yield('%>')
        if  is_erb_stag?(head)
          yield(:cr)
        else
          yield("\n")
        end
        head = nil
      else
        yield(token)
        head = nil if token == "\n"
      end
    end
	end
end