# File lib/will_paginate/view_helpers.rb, line 195
195:     def initialize
196:       @gap_marker = '<span class="gap">&hellip;</span>'
197:     end

     # File lib/will_paginate/view_helpers.rb, line 227
227:     def html_attributes
228:       return @html_attributes if @html_attributes
229:       @html_attributes = @options.except *(WillPaginate::ViewHelpers.pagination_options.keys - [:class])
230:       # pagination of Post models will have the ID of "posts_pagination"
231:       if @options[:container] and @options[:id] === true
232:         @html_attributes[:id] = @collection.first.class.name.underscore.pluralize + '_pagination'
233:       end
234:       @html_attributes
235:     end

     # File lib/will_paginate/view_helpers.rb, line 203
203:     def prepare(collection, options, template)
204:       @collection = collection
205:       @options    = options
206:       @template   = template
207: 
208:       # reset values in case we're re-using this instance
209:       @total_pages = @param_name = @url_string = nil
210:     end

     # File lib/will_paginate/view_helpers.rb, line 215
215:     def to_html
216:       links = @options[:page_links] ? windowed_links : []
217:       # previous/next buttons
218:       links.unshift page_link_or_span(@collection.previous_page, 'disabled prev_page', @options[:prev_label])
219:       links.push    page_link_or_span(@collection.next_page,     'disabled next_page', @options[:next_label])
220:       
221:       html = links.join(@options[:separator])
222:       @options[:container] ? @template.content_tag(:div, html, html_attributes) : html
223:     end

     # File lib/will_paginate/view_helpers.rb, line 290
290:     def page_link(page, text, attributes = {})
291:       @template.link_to text, url_for(page), attributes
292:     end

     # File lib/will_paginate/view_helpers.rb, line 279
279:     def page_link_or_span(page, span_class, text = nil)
280:       text ||= page.to_s
281:       
282:       if page and page != current_page
283:         classnames = span_class && span_class.index(' ') && span_class.split(' ', 2).last
284:         page_link page, text, :rel => rel_value(page), :class => classnames
285:       else
286:         page_span page, text, :class => span_class
287:       end
288:     end

     # File lib/will_paginate/view_helpers.rb, line 294
294:     def page_span(page, text, attributes = {})
295:       @template.content_tag :span, text, attributes
296:     end

     # File lib/will_paginate/view_helpers.rb, line 300
300:     def url_for(page)
301:       page_one = page == 1
302:       unless @url_string and !page_one
303:         @url_params = {}
304:         # page links should preserve GET parameters
305:         stringified_merge @url_params, @template.params if @template.request.get?
306:         stringified_merge @url_params, @options[:params] if @options[:params]
307:         
308:         if complex = param_name.index(/[^\w-]/)
309:           page_param = (defined?(CGIMethods) ? CGIMethods : ActionController::AbstractRequest).
310:             parse_query_parameters("#{param_name}=#{page}")
311:           
312:           stringified_merge @url_params, page_param
313:         else
314:           @url_params[param_name] = page_one ? 1 : 2
315:         end
316: 
317:         url = @template.url_for(@url_params)
318:         return url if page_one
319:         
320:         if complex
321:           @url_string = url.sub(%r!((?:\?|&)#{CGI.escape param_name}=)#{page}!, '\1@')
322:           return url
323:         else
324:           @url_string = url
325:           @url_params[param_name] = 3
326:           @template.url_for(@url_params).split(//).each_with_index do |char, i|
327:             if char == '3' and url[i, 1] == '2'
328:               @url_string[i] = '@'
329:               break
330:             end
331:           end
332:         end
333:       end
334:       # finally!
335:       @url_string.sub '@', page.to_s
336:     end

     # File lib/will_paginate/view_helpers.rb, line 254
254:     def visible_page_numbers
255:       inner_window, outer_window = @options[:inner_window].to_i, @options[:outer_window].to_i
256:       window_from = current_page - inner_window
257:       window_to = current_page + inner_window
258:       
259:       # adjust lower or upper limit if other is out of bounds
260:       if window_to > total_pages
261:         window_from -= window_to - total_pages
262:         window_to = total_pages
263:       end
264:       if window_from < 1
265:         window_to += 1 - window_from
266:         window_from = 1
267:         window_to = total_pages if window_to > total_pages
268:       end
269:       
270:       visible   = (1..total_pages).to_a
271:       left_gap  = (2 + outer_window)...window_from
272:       right_gap = (window_to + 1)...(total_pages - outer_window)
273:       visible  -= left_gap.to_a  if left_gap.last - left_gap.first > 1
274:       visible  -= right_gap.to_a if right_gap.last - right_gap.first > 1
275: 
276:       visible
277:     end

     # File lib/will_paginate/view_helpers.rb, line 240
240:     def windowed_links
241:       prev = nil
242: 
243:       visible_page_numbers.inject [] do |links, n|
244:         # detect gaps:
245:         links << gap_marker if prev and n > prev + 1
246:         links << page_link_or_span(n, 'current')
247:         prev = n
248:         links
249:       end
250:     end

     # File lib/will_paginate/view_helpers.rb, line 348
348:     def current_page
349:       @collection.current_page
350:     end

     # File lib/will_paginate/view_helpers.rb, line 356
356:     def param_name
357:       @param_name ||= @options[:param_name].to_s
358:     end

     # File lib/will_paginate/view_helpers.rb, line 340
340:     def rel_value(page)
341:       case page
342:       when @collection.previous_page; 'prev' + (page == 1 ? ' start' : '')
343:       when @collection.next_page; 'next'
344:       when 1; 'start'
345:       end
346:     end

     # File lib/will_paginate/view_helpers.rb, line 361
361:     def stringified_merge(target, other)
362:       other.each do |key, value|
363:         key = key.to_s # this line is what it's all about!
364:         existing = target[key]
365: 
366:         if value.is_a?(Hash) and (existing.is_a?(Hash) or existing.nil?)
367:           stringified_merge(existing || (target[key] = {}), value)
368:         else
369:           target[key] = value
370:         end
371:       end
372:     end

     # File lib/will_paginate/view_helpers.rb, line 352
352:     def total_pages
353:       @total_pages ||= WillPaginate::ViewHelpers.total_pages_for_collection(@collection)
354:     end