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ProjectFileParser.rb
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ProjectFileParser.rb
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#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = ProjectFileParser.rb -- The TaskJuggler III Project Management Software
#
# Copyright (c) 2006, 2007, 2008, 2009, 2010 by Chris Schlaeger <cs@kde.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
require 'TextParser'
require 'ProjectFileScanner'
require 'TjpSyntaxRules'
require 'RichText'
require 'RTFHandlers'
class TaskJuggler
# This class specializes the TextParser class for use with TaskJuggler project
# files (TJP Files). The primary purpose is to provide functionality that make
# it more comfortable to define the TaskJuggler syntax in a form that is human
# creatable but also powerful enough to define the data structures the parser
# needs to understand the syntax.
#
# By adding some additional information to the syntax rules, we can also
# generate the complete reference manual from this rule set.
class ProjectFileParser < TextParser
include TjpSyntaxRules
# Create the parser object. _messageHandler_ is a TjMessageHandler that is
# used for error reporting.
def initialize(messageHandler)
super()
@messageHandler = messageHandler
# Define the token types that the ProjectFileScanner may return for
# variable elements.
@variables = %w( INTEGER FLOAT DATE TIME STRING LITERAL ID ID_WITH_COLON
ABSOLUTE_ID MACRO )
initRules
@project = nil
end
# Call this function with the master file to start processing a TJP file or
# a set of TJP files.
def open(file, master, fileNameIsBuffer = false)
begin
@scanner = ProjectFileScanner.new(file, @messageHandler)
# We need the ProjectFileScanner object for error reporting.
if master && !fileNameIsBuffer && file != '.' && file[-4, 4] != '.tjp'
error('illegal_extension', "Project file name must end with " +
'\'.tjp\' extension')
end
@scanner.open(fileNameIsBuffer)
rescue StandardError
error('file_open', $!.message)
end
@property = nil
@scenarioIdx = 0
initFileStack
end
# Call this function to cleanup the parser structures after the file
# processing has been completed.
def close
res = @scanner.close
res
end
# This function will deliver the next token from the scanner. A token is a
# two element Array that contains the ID or type of the token as well as the
# text string of the token.
def nextToken
@scanner.nextToken
end
# This function can be used to return tokens. Returned tokens will be pushed
# on a LIFO stack. To preserve the order of the original tokens the last
# token must be returned first. This mechanism is used to implement
# look-ahead functionality.
def returnToken(token)
@scanner.returnToken(token)
end
# A set of standard marcros is defined in all files as soon as the project
# header has been read. Calling this functions gets the values from @project
# and inserts the Macro objects into the ProjectFileScanner.
def setGlobalMacros
@scanner.addMacro(Macro.new('projectstart', @project['start'].to_s,
@scanner.sourceFileInfo))
@scanner.addMacro(Macro.new('projectend', @project['end'].to_s,
@scanner.sourceFileInfo))
@scanner.addMacro(Macro.new('now', @project['now'].to_s,
@scanner.sourceFileInfo))
@scanner.addMacro(Macro.new('today', @project['now'].
to_s(@project['timeFormat']),
@scanner.sourceFileInfo))
end
def parseReportAttributes(report, attributes)
@property = report
@project = report.project
open(attributes, false, true)
parse('reportAttributes')
end
private
# Utility function that convers English weekday names into their index
# number and does some error checking. It returns 0 for 'sun', 1 for 'mon'
# and so on.
def weekDay(name)
names = %w( sun mon tue wed thu fri sat )
if (day = names.index(@val[0])).nil?
error('weekday', "Weekday name expected (#{names.join(', ')})")
end
day
end
# Make sure that certain attributes are not used after sub properties have
# been added to a property.
def checkContainer(attribute)
if @property.container?
error('container_attribute',
"The attribute #{attribute} may not be used for this property " +
'after sub properties have been added.', @property,
@sourceFileInfo[0])
end
end
# Convenience function to check that an Interval fits completely within the
# project time frame.
def checkInterval(iv)
# Make sure the interval is within the project time frame.
if iv.start < @project['start'] || iv.start >= @project['end']
error('interval_start_in_range',
"Start date #{iv.start} must be within the project time frame " +
"(#{@project['start']} - #{@project['end']})")
end
if iv.end <= @project['start'] || iv.end > @project['end']
error('interval_end_in_range',
"End date #{iv.end} must be within the project time frame " +
"(#{@project['start']} - #{@project['end']})")
end
end
# Convenience function to check the integrity of a booking statement.
def checkBooking(task, resource)
unless task.leaf?
error('booking_no_leaf', "#{task.fullId} is not a leaf task",
task, @sourceFileInfo[0])
end
if task['milestone', @scenarioIdx]
error('booking_milestone', "You cannot add bookings to a milestone",
task, @sourceFileInfo[0])
end
unless resource.leaf?
error('booking_group', "You cannot book a group resource",
task, @sourceFileInfo[0])
end
end
# The TaskJuggler syntax can be extended by the user when the properties are
# extended with user-defined attributes. These attribute definitions
# introduce keywords that have to be processed like the build-in keywords.
# The parser therefor needs to adapt on the fly to the new syntax. By
# calling this function, a TaskJuggler property can be extended with a new
# attribute. @propertySet determines what property should be extended.
# _type_ is the attribute type, _default_ is the default value.
def extendPropertySetDefinition(type, default)
if @propertySet.knownAttribute?(@val[1])
error('extend_redefinition',
"The extended attribute #{@val[1]} has already been defined.")
end
# Determine the values for scenarioSpecific and inheritable.
inherit = false
scenarioSpecific = false
unless @val[3].nil?
@val[3].each do |option|
case option
when 'inherit'
inherit = true
when 'scenariospecific'
scenarioSpecific = true
end
end
end
# Register the new Attribute type with the Property set it should belong
# to.
@propertySet.addAttributeType(AttributeDefinition.new(
@val[1], @val[2], type, inherit, false, scenarioSpecific, default, true))
# Add the new user-defined attribute as reportable attribute to the parser
# rule.
oldCurrentRule = @cr
@cr = @rules['reportableAttributes']
singlePattern('_' + @val[1])
descr(@val[2])
@cr = oldCurrentRule
scenarioSpecific
end
# This function is primarily a wrapper around the RichText constructor. It
# catches all RichTextScanner processing problems and converts the exception
# data into a MessageHandler message that points to the correct location.
# This is necessary, because the RichText parser knows nothing about the
# actual input file. So we have to map the error location in the RichText
# input stream back to the position in the project file.
# To limit the supported set of variable tokens, a subset can be provided
# by _tokenSet_.
def newRichText(text, tokenSet = nil)
sfi = sourceFileInfo
begin
rText = RichText.new(text, RTFHandlers.create(@project, sfi))
rti = rText.generateIntermediateFormat( [ 0, 0, 0], tokenSet)
rti.sectionNumbers = false
rescue RichTextException => msg
sfi = SourceFileInfo.new(sfi.fileName, sfi.lineNo + msg.lineNo - 1, 0)
message = Message.new(msg.id, 'error', msg.text + "\n" + msg.line,
@property, nil, sfi)
@messageHandler.send(message)
# An empty strings signals an already reported error
raise TjException.new, ''
end
rti
end
# This method is a convenience wrapper around Project.new. It checks if
# the report name already exists. It also triggers the attribute
# inheritance. +name+ is the name of the report, +type+ is the report
# type. +sourceFileInfo+ is a SourceFileInfo of the report definition. The
# method returns the newly created Report.
def newReport(id, name, type, sourceFileInfo)
@reportCounter += 1
if name != '.'
if @project.reportByName(name)
error('report_redefinition',
"A report with the name #{name} has already been defined.")
end
end
@property = Report.new(@project, id || "report#{@reportCounter}",
name, nil)
@property.typeSpec = type
@property.sourceFileInfo = sourceFileInfo
@property.set('formats', [ :tjp ])
@property.inheritAttributes
@property
end
# If the @limitResources list is not empty, we have to create a Limits
# object for each Resource. Otherwise, one Limits object is enough.
def setLimit(name, value, interval)
if @limitResources.empty?
@limits.setLimit(name, value, interval)
else
@limitResources.each do |resource|
@limits.setLimit(name, value, interval, resource)
end
end
end
# The following functions are mostly conveniance functions to simplify the
# syntax tree definition. The *Rule functions may only be used in _rule
# functions. And only one function call per _rule function is allowed.
# This function creates a set of rules to describe a list of keywords.
# _name_ is the name of the top-level rule and _items_ can be a Hash or
# Array. The array just contains the allowed keywords, the Hash contains
# keyword/description pairs. The description is used to describe
# the keyword in the manual. The syntax supports two special cases. A '*'
# means all items in the list and '-' means the list is empty.
def allOrNothingListRule(name, items)
newRule(name) {
# A '*' means all possible items should be in the list.
pattern(%w( _* ), lambda {
KeywordArray.new([ '*' ])
})
descr('A shortcut for all items')
# A '-' means the list should be empty.
pattern([ '_-' ], lambda {
KeywordArray.new
})
descr('No items')
# Or the list consists of one or more comma separated keywords.
pattern([ "!#{name}_AoN_ruleItems" ], lambda {
KeywordArray.new(@val[0])
})
}
# Create the rule for the comma separated list.
newRule("#{name}_AoN_ruleItems") {
listRule("more#{name}_AoN_ruleItems", "!#{name}_AoN_ruleItem")
}
# Create the rule for the keywords with their description.
newRule("#{name}_AoN_ruleItem") {
if items.is_a?(Array)
items.each { |keyword| singlePattern('_' + keyword) }
else
items.each do |keyword, description|
singlePattern('_' + keyword)
descr(description) if description
end
end
}
end
def listRule(name, listItem)
pattern([ "#{listItem}", "!#{name}" ], lambda {
if @val[1] && @val[1].include?(@val[0])
error('duplicate_in_list',
"Duplicate items in list.")
end
[ @val[0] ] + (@val[1].nil? ? [] : @val[1])
})
newRule(name) {
commaListRule(listItem)
}
end
def commaListRule(listItem)
optional
repeatable
pattern([ '_,', "#{listItem}" ], lambda {
@val[1]
})
end
# Create pattern that turns the rule into the definition for optional
# attributes. _attributes_ is the rule that lists these attributes.
def optionsRule(attributes)
optional
pattern([ '_{', "!#{attributes}", '_}' ], lambda {
@val[1]
})
end
# Create a pattern with just a single _item_. The pattern returns the value
# of that item.
def singlePattern(item)
pattern([ item ], lambda {
@val[0]
})
end
# Add documentation for the current pattern of the currently processed rule.
def doc(keyword, text)
@cr.setDoc(keyword, text)
end
# Add documentation for patterns that only consists of a single terminal
# token.
def descr(text)
if @cr.patterns[-1].length != 1 ||
(@cr.patterns[-1][0][0] != ?_ && @cr.patterns[-1][0][0] != ?$)
raise 'descr() may only be used for patterns with terminal tokens.'
end
arg(0, nil, text)
end
# Add documentation for the arguments with index _idx_ of the current
# pattern of the currently processed rule. _name_ is that should be used for
# this variable. _text_ is the documentation text.
def arg(idx, name, text)
@cr.setArg(idx, TextParser::TokenDoc.new(name, text))
end
# Restrict the syntax documentation of the previously defined pattern to
# the first +idx+ tokens.
def lastSyntaxToken(idx)
@cr.setLastSyntaxToken(idx)
end
# Add a reference to another pattern. This information is only used to
# generate the documentation for the patterns of this rule.
def also(seeAlso)
seeAlso = [ seeAlso ] unless seeAlso.is_a?(Array)
@cr.setSeeAlso(seeAlso)
end
# Add a TJP file or parts of it as an example. The TJP _file_ must be in the
# directory test/TestSuite/Syntax/Correct. _tag_ can be used to identify
# that only a part of the file should be included.
def example(file, tag = nil)
@cr.setExample(file, tag)
end
# Determine the title of the column with the ID _colId_. The title may be
# from the static set or be from a user defined attribute.
def columnTitle(colId)
TableReport.defaultColumnTitle(colId) ||
@project.attributeName(colId)
end
# To manage certain variables that have file scope throughout a hierachie
# of nested include files, we use a @fileStack to track those variables.
# The values primarily live in their class instance variables. But upon
# return from an included file, we need to restore the old values. This
# function creates or resets the stack.
def initFileStack
@fileStackVariables = %w( taskprefix reportprefix
resourceprefix accountprefix )
stackEntry = {}
@fileStackVariables.each do |var|
stackEntry[var] = ''
instance_variable_set('@' + var, '')
end
@fileStack = [ stackEntry ]
end
# Push a new set of variables onto the @fileStack.
def pushFileStack
stackEntry = {}
@fileStackVariables.each do |var|
stackEntry[var] = instance_variable_get('@' + var)
end
@fileStack << stackEntry
end
# Pop the last stack entry from the @fileStack and restore the class
# variables according to the now top-entry.
def popFileStack
@fileStack.pop
@fileStackVariables.each do |var|
stackEntry = @fileStack.last
instance_variable_set('@' + var, stackEntry[var])
end
end
end
end