Class: Zafu::Parser
- Inherits:
-
Object
- Object
- Zafu::Parser
- Defined in:
- lib/zafu/parser.rb
Constant Summary collapse
- TEXT_CALLBACKS =
%w{before_parse after_parse before_wrap wrap after_wrap after_process}
- PROCESS_CALLBACKS =
%w{before_process expander process_unknown}
- CALLBACKS =
TEXT_CALLBACKS + PROCESS_CALLBACKS
- @@callbacks =
{}
Instance Attribute Summary collapse
-
#blocks ⇒ Object
Returns the value of attribute blocks.
-
#defined_ids ⇒ Object
Returns the value of attribute defined_ids.
-
#errors ⇒ Object
Returns the value of attribute errors.
-
#ids ⇒ Object
Returns the value of attribute ids.
-
#method ⇒ Object
Returns the value of attribute method.
-
#name ⇒ Object
Returns the value of attribute name.
-
#options ⇒ Object
Returns the value of attribute options.
-
#params ⇒ Object
Method parameters “<r:show attr=‘name’/>” (params contains => ‘name’).
-
#parent ⇒ Object
Returns the value of attribute parent.
-
#pass(elems = nil) ⇒ Object
Pass some contextual information to siblings.
-
#text ⇒ Object
Returns the value of attribute text.
Class Method Summary collapse
- .erb_safe(text) ⇒ Object
-
.get_template_text(path, helper, base_path = nil, opts = {}) ⇒ Object
Retrieve the template text in the current folder or as an absolute path.
- .new_with_url(path, opts = {}) ⇒ Object
- .parser_error(message, method) ⇒ Object
Instance Method Summary collapse
-
#all_descendants ⇒ Object
(also: #public_descendants)
Return a hash of all descendants.
-
#ancestor(keys) ⇒ Object
Return the last defined parent for the given keys.
- #ancestors ⇒ Object
- #check_params(*args) ⇒ Object
-
#child ⇒ Object
Find a direct child with
child[method]
. -
#default_expander ⇒ Object
Default processing.
-
#default_unknown ⇒ Object
basic rule to display errors.
-
#descendant(key) ⇒ Object
Return the last defined descendant for the given key.
- #descendants(key) ⇒ Object
- #do_method(sym) ⇒ Object
- #dynamic_blocks? ⇒ Boolean
-
#eat(arg) ⇒ Object
Advance parser.
- #empty? ⇒ Boolean
- #enter(mode) ⇒ Object
- #expand_block(block, new_context = {}) ⇒ Object
- #expand_with(acontext = {}) ⇒ Object
- #expander ⇒ Object
- #extract_name ⇒ Object
- #fail ⇒ Object
- #flush(str = @text) ⇒ Object
-
#include_part(obj) ⇒ Object
Hook called when including a part “<r:include template=‘layout’ part=‘title’/>”.
- #include_template ⇒ Object
-
#initialize(text, opts = {}) ⇒ Parser
constructor
A new instance of Parser.
- #inspect ⇒ Object
- #leave(mode = nil) ⇒ Object
- #make(mode, opts = {}) ⇒ Object
-
#out(str) ⇒ Object
Output ERB code during ast processing.
-
#out_post(str) ⇒ Object
Output ERB code that will be inserted after @result.
- #parser_continue(message, method = @method) ⇒ Object
- #parser_error(message, method = @method, halt = true) ⇒ Object
- #process(context = {}) ⇒ Object
- #process_unknown ⇒ Object
-
#r_expand_with ⇒ Object
Set context with variables (unsafe) from template.
- #r_ignore ⇒ Object
- #r_inspect ⇒ Object
- #r_void ⇒ Object (also: #to_s)
-
#replace_with(obj) ⇒ Object
Hook called when replacing part of an included template with ‘<r:with part=’main’>…</r:with>‘ This replaces the current object ’self’ which is in the original included template, with the custom version ‘obj’.
-
#restore_state(saved) ⇒ Object
Restore state from a hash.
-
#root ⇒ Object
Return the root block (the one opened first).
-
#save_state ⇒ Object
This method is called at the very beginning of the processing chain and is used to store state to make ‘process’ reintrant…
- #show_errors ⇒ Object
- #start(mode) ⇒ Object
-
#store(obj) ⇒ Object
Build blocks.
- #success? ⇒ Boolean
- #to_erb(context) ⇒ Object
- #wrap(text) ⇒ Object
- #wrap_callbacks ⇒ Object
Constructor Details
#initialize(text, opts = {}) ⇒ Parser
Returns a new instance of Parser.
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# File 'lib/zafu/parser.rb', line 165 def initialize(text, opts={}) @stack = [] @ok = true @blocks = [] @errors = [] @options = {:mode=>:void, :method=>'void'}.merge(opts) @params = @options.delete(:params) || {} @method = @options.delete(:method) @ids = @options[:ids] ||= {} original_ids = @ids.dup @defined_ids = {} # ids defined in this node or this node's sub blocks mode = @options.delete(:mode) @parent = @options.delete(:parent) if opts[:sub] @text = text else @text = before_parse(text) if part = opts[:part] # Optimization: try to find part from id if @text =~ /^(.*?)<[^<>]+id='#{part}'/m eat $1 end end end start(mode) # set name @name ||= extract_name @options[:ids][@name] = self if @name unless opts[:sub] @text = after_parse(@text) end @ids.keys.each do |k| if original_ids[k] != @ids[k] @defined_ids[k] = @ids[k] end end @ok end |
Instance Attribute Details
#blocks ⇒ Object
Returns the value of attribute blocks.
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# File 'lib/zafu/parser.rb', line 27 def blocks @blocks end |
#defined_ids ⇒ Object
Returns the value of attribute defined_ids.
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# File 'lib/zafu/parser.rb', line 27 def defined_ids @defined_ids end |
#errors ⇒ Object
Returns the value of attribute errors.
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# File 'lib/zafu/parser.rb', line 27 def errors @errors end |
#ids ⇒ Object
Returns the value of attribute ids.
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# File 'lib/zafu/parser.rb', line 27 def ids @ids end |
#method ⇒ Object
Returns the value of attribute method.
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# File 'lib/zafu/parser.rb', line 27 def method @method end |
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/zafu/parser.rb', line 27 def name @name end |
#options ⇒ Object
Returns the value of attribute options.
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# File 'lib/zafu/parser.rb', line 27 def @options end |
#params ⇒ Object
Method parameters “<r:show attr=‘name’/>” (params contains => ‘name’).
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# File 'lib/zafu/parser.rb', line 30 def params @params end |
#parent ⇒ Object
Returns the value of attribute parent.
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# File 'lib/zafu/parser.rb', line 27 def parent @parent end |
#pass(elems = nil) ⇒ Object
Pass some contextual information to siblings
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# File 'lib/zafu/parser.rb', line 224 def pass @pass end |
#text ⇒ Object
Returns the value of attribute text.
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# File 'lib/zafu/parser.rb', line 27 def text @text end |
Class Method Details
.erb_safe(text) ⇒ Object
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# File 'lib/zafu/parser.rb', line 56 def erb_safe(text) text.gsub('<%', '<%').gsub('%>', '%>') end |
.get_template_text(path, helper, base_path = nil, opts = {}) ⇒ Object
Retrieve the template text in the current folder or as an absolute path. This method is used when ‘including’ text
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# File 'lib/zafu/parser.rb', line 42 def get_template_text(path, helper, base_path=nil, opts={}) cache = (visitor.zafu_cache ||= {}) unless res = cache[path] res = helper.send(:get_template_text, path, base_path, opts) res = [parser_error("template '#{path}' not found", 'include'), nil, nil] unless res cache[path] = res end res end |
.new_with_url(path, opts = {}) ⇒ Object
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# File 'lib/zafu/parser.rb', line 33 def new_with_url(path, opts={}) helper = opts[:helper] || Zafu::MockHelper.new text, fullpath, base_path = self.get_template_text(path, helper) return parser_error("template '#{path}' not found", 'include') unless text self.new(text, :helper => helper, :base_path => base_path, :included_history => [fullpath], :root => path, :master_template => opts[:master_template]) end |
.parser_error(message, method) ⇒ Object
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# File 'lib/zafu/parser.rb', line 52 def parser_error(, method) "<span class='parser_error'><span class='method'>#{erb_safe method}</span> <span class='message'>#{erb_safe }</span></span>" end |
Instance Method Details
#all_descendants ⇒ Object Also known as: public_descendants
Return a hash of all descendants. Find a specific descendant with descendant for example.
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# File 'lib/zafu/parser.rb', line 402 def all_descendants @all_descendants ||= begin d = {} @blocks.each do |b| next if b.kind_of?(String) b.public_descendants.each do |k,v| d[k] ||= [] d[k] += v end # latest is used first: use direct children before grandchildren. d[b.method] ||= [] d[b.method] << b end d end end |
#ancestor(keys) ⇒ Object
Return the last defined parent for the given keys.
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# File 'lib/zafu/parser.rb', line 447 def ancestor(keys) keys = Array(keys) ancestors.reverse_each do |a| if keys.include?(a.method) return a end end nil end |
#ancestors ⇒ Object
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# File 'lib/zafu/parser.rb', line 434 def ancestors @ancestors ||= begin if parent parent.ancestors + [parent] else [] end end end |
#check_params(*args) ⇒ Object
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# File 'lib/zafu/parser.rb', line 567 def check_params(*args) missing = [] if args[0].kind_of?(Array) # or groups ok = false args.each_index do |i| unless args[i].kind_of?(Array) missing[i] = [args[i]] next end missing[i] = [] args[i].each do |arg| missing[i] << arg.to_s unless @params[arg] end if missing[i] == [] ok = true break end end if ok return true else out "[#{@method} parameter(s) missing:#{missing[0].sort.join(', ')}]" return false end else args.each do |arg| missing << arg.to_s unless @params[arg] end end if missing != [] out "[#{@method} parameter(s) missing:#{missing.sort.join(', ')}]" return false end true end |
#child ⇒ Object
Find a direct child with child[method]
.
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# File 'lib/zafu/parser.rb', line 420 def child Hash[*@blocks.map do |b| b.kind_of?(String) ? nil : [b.method, b] end.compact.flatten] end |
#default_expander ⇒ Object
Default processing
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# File 'lib/zafu/parser.rb', line 277 def if respond_to?("r_#{@method}".to_sym) do_method("r_#{@method}".to_sym) else do_method(:process_unknown) end end |
#default_unknown ⇒ Object
basic rule to display errors
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# File 'lib/zafu/parser.rb', line 308 def default_unknown sp = "" @params.each do |k,v| sp += " #{k}=#{v.inspect.gsub("'","TMPQUOTE").gsub('"',"'").gsub("TMPQUOTE",'"')}" end res = "<span class='parser_unknown'><r:#{@method}#{sp}" inner = if inner != '' res + "></span>#{inner}<span class='parser_unknown'><r:/#{@method}></span>" else res + "/></span>" end end |
#descendant(key) ⇒ Object
Return the last defined descendant for the given key.
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# File 'lib/zafu/parser.rb', line 458 def descendant(key) descendants(key).last end |
#descendants(key) ⇒ Object
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# File 'lib/zafu/parser.rb', line 430 def descendants(key) all_descendants[key] || [] end |
#do_method(sym) ⇒ Object
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# File 'lib/zafu/parser.rb', line 285 def do_method(sym) res = self.send(sym) if res.kind_of?(String) @result << res elsif @result.blank? @result << (@errors.empty? ? '' : show_errors) end @result end |
#dynamic_blocks? ⇒ Boolean
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# File 'lib/zafu/parser.rb', line 426 def dynamic_blocks? @blocks.detect { |b| !b.kind_of?(String) } end |
#eat(arg) ⇒ Object
Advance parser.
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# File 'lib/zafu/parser.rb', line 505 def eat(arg) if arg.kind_of?(String) len = arg.length elsif arg.kind_of?(Fixnum) len = arg else raise end @text = @text[len..-1] end |
#empty? ⇒ Boolean
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# File 'lib/zafu/parser.rb', line 244 def empty? @blocks == [] && (@params == {} || @params == {:part => @params[:part]}) end |
#enter(mode) ⇒ Object
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# File 'lib/zafu/parser.rb', line 516 def enter(mode) @stack << mode # puts "ENTER(#{@method},:#{mode}) [#{@text}] #{@zafu_tag_count.inspect}" if mode == :void sym = :scan else sym = "scan_#{mode}".to_sym end while (@text != '' && @stack[-1] == mode) # puts "CONTINUE(#{@method},:#{mode}) [#{@text}] #{@zafu_tag_count.inspect}" self.send(sym) end # puts "LEAVE(#{@method},:#{mode}) [#{@text}] #{@zafu_tag_count.inspect}" end |
#expand_block(block, new_context = {}) ⇒ Object
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# File 'lib/zafu/parser.rb', line 604 def (block, new_context={}) block.process(@context.merge(new_context)) end |
#expand_with(acontext = {}) ⇒ Object
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# File 'lib/zafu/parser.rb', line 608 def (acontext={}) blocks = acontext.delete(:blocks) || @blocks res = "" only = acontext[:only] new_context = @context.merge(acontext) if acontext[:ignore] new_context[:ignore] = (@context[:ignore] || []) + (acontext[:ignore] || []).uniq end if acontext[:no_ignore] new_context[:ignore] = (new_context[:ignore] || []) - acontext[:no_ignore] end ignore = new_context[:ignore] blocks.each do |b| if b.kind_of?(String) if (!only || (only.kind_of?(Array) && only.include?(:string))) && (!ignore || !ignore.include?(:string)) res << b end elsif (!only || (only.kind_of?(Array) && only.include?(b.method)) || only =~ b.method) && (!ignore || !ignore.include?(b.method)) res << b.process(new_context.dup) if pass = b.pass new_context.merge!(pass) end end end res end |
#expander ⇒ Object
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# File 'lib/zafu/parser.rb', line 85 def self.class..reverse_each do |callback| if res = send(callback) if res.kind_of?(String) @result << res end return @result end end nil end |
#extract_name ⇒ Object
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# File 'lib/zafu/parser.rb', line 210 def extract_name @options[:name] || @params[:id] end |
#fail ⇒ Object
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# File 'lib/zafu/parser.rb', line 562 def fail @ok = false @stack = [] end |
#flush(str = @text) ⇒ Object
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# File 'lib/zafu/parser.rb', line 471 def flush(str=@text) return if str == '' if @blocks.last.kind_of?(String) @blocks[-1] << str else @blocks << str end @text = @text[str.length..-1] end |
#include_part(obj) ⇒ Object
Hook called when including a part “<r:include template=‘layout’ part=‘title’/>”
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# File 'lib/zafu/parser.rb', line 240 def include_part(obj) [obj] end |
#include_template ⇒ Object
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# File 'lib/zafu/parser.rb', line 336 def include_template return parser_error("missing 'template' attribute") unless @params[:template] if @options[:part] && @options[:part] == @params[:part] # fetching only a part, do not open this element (same as original caller) as it is useless and will make us loop the loop. @method = 'ignore' enter(:void) return end @method = 'void' # fetch text @options[:included_history] ||= [] included_text, absolute_url, base_path = self.class.get_template_text(@params[:template], @options[:helper], @options[:base_path]) if absolute_url absolute_url += "::#{@params[:part].gsub('/','_')}" if @params[:part] absolute_url += "??#{@options[:part].gsub('/','_')}" if @options[:part] if @options[:included_history].include?(absolute_url) included_text = parser_error("infinity loop: #{(@options[:included_history] + [absolute_url]).join(' --> ')}", 'include') else included_history = @options[:included_history] + [absolute_url] end else # Error: included_text contains the error meessage @blocks = [included_text] return end res = self.class.new(included_text, :helper => @options[:helper], :base_path => base_path, :included_history => included_history, :part => @params[:part], :parent => self) # we set :part to avoid loop failure when doing self inclusion if @params[:part] if iblock = res.ids[@params[:part]] included_blocks = include_part(iblock) # get all ids from inside the included part: @ids.merge! iblock.defined_ids else included_blocks = [parser_error("'#{@params[:part]}' not found in template '#{@params[:template]}'", 'include')] end else included_blocks = res.blocks @ids.merge! res.ids end enter(:void) # normal scan on content # replace 'with' @blocks.each do |b| next if b.kind_of?(String) || b.method != 'with' if target = res.ids[b.params[:part]] if target.kind_of?(String) # error elsif b.empty? target.method = 'ignore' else target.replace_with(b) end else # part not found parser_error("'#{b.params[:part]}' not found in template '#{@params[:template]}'", 'with') end end @blocks = included_blocks end |
#inspect ⇒ Object
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# File 'lib/zafu/parser.rb', line 641 def inspect attributes = [] params = [] (@params || {}).each do |k,v| unless v.nil? params << "#{k.inspect.gsub('"', "'")}=>'#{v}'" end end attributes << " {= #{params.sort.join(', ')}}" unless params == [] context = [] (@context || {}).each do |k,v| unless v.nil? context << "#{k.inspect.gsub('"', "'")}=>'#{v}'" end end attributes << " {> #{context.sort.join(', ')}}" unless context == [] res = [] @blocks.each do |b| if b.kind_of?(String) res << b else res << b.inspect end end result = "[#{@method}#{attributes.join('')}" if res != [] result += "]#{res}[/#{@method}]" else result += "/]" end result + @text end |
#leave(mode = nil) ⇒ Object
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# File 'lib/zafu/parser.rb', line 550 def leave(mode=nil) if mode.nil? @stack = [] return end pop = true while @stack != [] && pop pop = @stack.pop break if pop == mode end end |
#make(mode, opts = {}) ⇒ Object
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# File 'lib/zafu/parser.rb', line 531 def make(mode, opts={}) if opts[:text] custom_text = opts.delete(:text) end text = custom_text || @text opts = @options.merge(opts).merge(:sub => true, :mode => mode, :parent => self) new_obj = self.class.new(text, opts) if new_obj.success? @text = new_obj.text unless custom_text new_obj.text = "" store new_obj else flush @text[0..(new_obj.text.length - @text.length)] unless custom_text end # puts "MADE #{new_obj.inspect}" # puts "TEXT #{@text.inspect}" new_obj end |
#out(str) ⇒ Object
Output ERB code during ast processing.
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# File 'lib/zafu/parser.rb', line 491 def out(str) @result << str # Avoid double entry when this is the last call in a render method. true end |
#out_post(str) ⇒ Object
Output ERB code that will be inserted after @result.
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# File 'lib/zafu/parser.rb', line 498 def out_post(str) @out_post << str # Avoid double entry when this is the last call in a render method. true end |
#parser_continue(message, method = @method) ⇒ Object
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# File 'lib/zafu/parser.rb', line 148 def parser_continue(, method = @method) parser_error(, method, false) end |
#parser_error(message, method = @method, halt = true) ⇒ Object
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# File 'lib/zafu/parser.rb', line 139 def parser_error(, method = @method, halt = true) if halt self.class.parser_error(, method) else @errors << self.class.parser_error(, method) nil end end |
#process(context = {}) ⇒ Object
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# File 'lib/zafu/parser.rb', line 248 def process(context={}) return '' if @method == 'ignore' || @method.blank? saved = save_state if @name # we pass the name as 'context' in the children tags @context = context.merge(:name => @name) else @context = context end # FIXME: replace with array and join (faster) @result = "" @out_post = "" @pass = nil before_process res = wrap( || ) res = after_process(res) # restore state restore_state(saved) res end |
#process_unknown ⇒ Object
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# File 'lib/zafu/parser.rb', line 152 def process_unknown self.class.process_unknown_callbacks.each do |callback| if res = send(callback) return res end end @errors.empty? ? default_unknown : show_errors end |
#r_expand_with ⇒ Object
Set context with variables (unsafe) from template.
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# File 'lib/zafu/parser.rb', line 324 def hash = {} @params.each do |k,v| hash["exp_#{k}"] = v.inspect end (hash) end |
#r_ignore ⇒ Object
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# File 'lib/zafu/parser.rb', line 332 def r_ignore '' end |
#r_inspect ⇒ Object
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# File 'lib/zafu/parser.rb', line 301 def r_inspect (:preflight=>true) @blocks = [] self.inspect end |
#r_void ⇒ Object Also known as: to_s
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# File 'lib/zafu/parser.rb', line 295 def r_void end |
#replace_with(obj) ⇒ Object
Hook called when replacing part of an included template with ‘<r:with part=’main’>…</r:with>‘ This replaces the current object ’self’ which is in the original included template, with the custom version ‘obj’.
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# File 'lib/zafu/parser.rb', line 232 def replace_with(obj) # keep @method (obj's method is always 'with') @blocks = obj.blocks.empty? ? @blocks : obj.blocks obj.params.delete(:part) @params.merge!(obj.params) end |
#restore_state(saved) ⇒ Object
Restore state from a hash
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# File 'lib/zafu/parser.rb', line 133 def restore_state(saved) saved.each do |key, value| instance_variable_set(key, value) end end |
#root ⇒ Object
Return the root block (the one opened first).
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# File 'lib/zafu/parser.rb', line 463 def root @root ||= parent ? parent.root : self end |
#save_state ⇒ Object
This method is called at the very beginning of the processing chain and is used to store state to make ‘process’ reintrant…
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# File 'lib/zafu/parser.rb', line 121 def save_state { :@context => @context, # <== we need this when rendering twice the same part :@result => @result, :@out_post => @out_post, :@params => @params.dup, :@method => @method, :@var => @var, } end |
#show_errors ⇒ Object
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# File 'lib/zafu/parser.rb', line 161 def show_errors @errors.join(' ') end |
#start(mode) ⇒ Object
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# File 'lib/zafu/parser.rb', line 219 def start(mode) enter(mode) end |
#store(obj) ⇒ Object
Build blocks
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# File 'lib/zafu/parser.rb', line 482 def store(obj) if obj.kind_of?(String) && @blocks.last.kind_of?(String) @blocks[-1] << obj elsif obj != '' @blocks << obj end end |
#success? ⇒ Boolean
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# File 'lib/zafu/parser.rb', line 467 def success? return @ok end |
#to_erb(context) ⇒ Object
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# File 'lib/zafu/parser.rb', line 214 def to_erb(context) context[:helper] ||= @options[:helper] process(context) end |
#wrap(text) ⇒ Object
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# File 'lib/zafu/parser.rb', line 110 def wrap(text) after_wrap( wrap_callbacks( before_wrap(text) + @out_post ) # @text contains unparsed data (white space) ) + @text end |
#wrap_callbacks ⇒ Object
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# File 'lib/zafu/parser.rb', line 108 alias wrap_callbacks wrap |