--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Basic support of internationalization through the generation of id-to-string tables
+module i18n_phase
+
+intrude import literal
+private import annotation
+private import parser_util
+import astbuilder
+
+redef class ToolContext
+ # Main phase of `language`
+ var localize_phase: Phase = new I18NPhase(self, [literal_phase])
+end
+
+private class I18NPhase
+ super Phase
+
+ redef fun process_annotated_node(nmodule, nat) do
+ if not nat.name == "i18n" then return
+
+ if not nmodule isa AModuledecl then
+ toolcontext.error(nmodule.location, "Error: The localized language can only be used on module declarations.")
+ return
+ end
+
+ var domain = nmodule.n_name.n_id.text
+
+ var lang: nullable String = null
+ if nat.n_args.length > 0 then
+ lang = nat.arg_as_string(toolcontext.modelbuilder)
+ if lang == null then return
+ end
+
+ var module_dir = nmodule.location.file.filename.dirname.realpath
+ var locale_dir = module_dir / "languages"
+
+ if not locale_dir.file_exists then locale_dir.mkdir
+
+ var amodule = nmodule.parent.as(AModule)
+
+ var vi = new StringFinder(domain, locale_dir, toolcontext, amodule)
+ vi.enter_visit(amodule)
+
+ var module_name = nmodule.location.file.filename.basename(".nit")
+
+ var pot_path = locale_dir / module_name
+ var arr = vi.strings.values.to_a
+ var po = new POFile.with_strings(arr)
+ po.write_template(pot_path)
+
+ if lang != null then
+ for i in po.strings do
+ i.msgstr = i.msgid
+ end
+
+ var lang_dir = locale_dir / lang
+ if not lang_dir.file_exists then lang_dir.mkdir
+
+ var messages_dir = lang_dir / "LC_MESSAGES"
+ if not messages_dir.file_exists then messages_dir.mkdir
+
+ po.write_to_file(messages_dir / module_name)
+ end
+
+ var lit = new LiteralVisitor(toolcontext)
+ lit.enter_visit(amodule)
+ end
+end
+
+private class StringFinder
+ super Visitor
+
+ # Strings in the file, used to generate .pot and .po files
+ var strings = new HashMap[String, PObject]
+
+ # Domain of the strings to internationalize
+ var domain: String
+
+ # Location of the languages file
+ var languages_location: String
+
+ # Context for the visitor, used only for the parse_expr
+ var toolcontext: ToolContext
+
+ # The module we are working on
+ var amodule: AModule
+
+ redef fun visit(n)
+ do
+ n.accept_string_finder(self)
+ n.visit_all(self)
+ end
+
+ redef fun enter_visit(e) do
+ if e isa AAnnotation then return
+ super
+ end
+end
+
+redef class ANode
+ private fun accept_string_finder(v: StringFinder) do end
+end
+
+redef class AStringExpr
+
+ redef fun accept_string_finder(v) do
+ var str = value.as(not null).escape_to_c
+ var parse = v.toolcontext.parse_expr("\"{str}\".get_translation(\"{v.domain}\", \"{v.languages_location}\").unescape_nit")
+ var loc = location
+ var locstr = "{v.amodule.mmodule.mgroup.name}::{v.amodule.mmodule.name} {loc.line_start}--{loc.column_start}:{loc.column_end}"
+ if not v.strings.has_key(str) then
+ var po = new PObject([locstr], str, "")
+ v.strings[str] = po
+ else
+ v.strings[str].locations.push locstr
+ end
+ replace_with(parse)
+ end
+end
+
+# .po file entry
+#
+# Locations are optional, they just serve for translation purposes
+# to help the translator with the context of the message if necessary
+#
+# msgid and msgstr are the map of translate to translated strings in the po file.
+class PObject
+ # Array since the same string can be encountered at several places
+ var locations: Array[String]
+ # Identifier of the string to translate (i.e. the string itself)
+ var msgid: String is writable
+ # Translation of the string
+ var msgstr: String is writable
+end
+
+# A GNU gettext .po/.pot file
+class POFile
+ super Writable
+
+ # Map of the strings's `msgid` and `msgstr`
+ #
+ # Read from a PO file
+ var strings: Array[PObject]
+
+ # Creates a PO file with strings built-in
+ init with_strings(sm: Array[PObject])do
+ strings = new Array[PObject].with_capacity(sm.length)
+ strings.add_all sm
+ end
+
+ redef fun write_to_file(path) do
+ if not path.has_suffix(".po") then path += ".po"
+ super path
+ end
+
+ redef fun write_to(ofs) do
+ for i in strings do
+ ofs.write("#: {i.locations.join(", ")}\n")
+ ofs.write("msgid \"{i.msgid}\"\n")
+ ofs.write("msgstr \"{i.msgstr}\"\n\n")
+ end
+ ofs.write("# Generated file, do not modify\n")
+ end
+
+ # Writes the information of the POFile to a .pot template file
+ fun write_template(path: String) do
+ if not path.has_suffix(".pot") then path += ".pot"
+ var f = new FileWriter.open(path)
+ write_to(f)
+ f.close
+ end
+end
nitlanguage / nit.git / commitdiff