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+If this is your first time building the HTML5 parser, you need to execute the
+following commands (from this directory) to bootstrap the translation:
+
+ make sync # fetch remote source files and licenses
+ make translate # perform the Java-to-C++ translation from the remote
+ # sources
+ make named_characters # Generate tables for named character tokenization
+
+If you make changes to the translator or the javaparser, you can rebuild by
+retyping 'make' in this directory. If you make changes to the HTML5 Java
+implementation, you can retranslate the Java sources from the htmlparser
+repository by retyping 'make translate' in this directory.
+
+The makefile supports the following targets:
+
+sync_htmlparser:
+ Retrieves the HTML parser and Java to C++ translator sources from GitHub.
+sync_javaparser:
+ Retrieves the javaparser sources from GitHub.
+sync:
+ Runs both sync_javaparser and sync_htmlparser.
+javaparser:
+ Builds the javaparser library retrieved earlier by sync_javaparser.
+translator:
+ Runs the javaparser target and then builds the Java to C++ translator from
+ sources retrieved earlier by sync_htmlparser.
+libs:
+ The default target. Alias for translator
+translate:
+ Runs the translator target and then translates the HTML parser sources
+ retrieved by sync_htmlparser copying the Java sources to ../javasrc.
+translate_from_snapshot:
+ Runs the translator target and then translates the HTML parser sources
+ stored in ../javasrc.
+named_characters:
+ Generates data tables for named character tokenization.
+
+## How to add an attribute
+
+# starting from the root of a mozilla-central checkout
+cd parser/html/java/
+make sync
+# now you have a clone of https://github.com/validator/htmlparser/tree/master in parser/html/java/htmlparser/
+cd htmlparser/src/
+$EDITOR nu/validator/htmlparser/impl/AttributeName.java
+# Perform case-insensitive searches for "uncomment" and uncomment stuff according to the comments that talk about uncommenting
+# Duplicate the declaration a normal attribute (nothings special in SVG mode, etc.). Let's use "alt", since it's the first one.
+# In the duplicate, replace ALT with the new name in all caps and "alt" with the new name in quotes in lower case.
+# Search for "ALT,", duplicate that line and change the duplicate to say the new name in all caps followed by comma.
+# Save.
+javac nu/validator/htmlparser/impl/AttributeName.java
+java nu.validator.htmlparser.impl.AttributeName
+# Copy and paste the output into nu/validator/htmlparser/impl/AttributeName.java replacing the text below the comment "START GENERATED CODE" and above the very last "}".
+# Recomment the bits that you uncommented earlier.
+# Save.
+cd ../.. # Back to parser/html/java/
+make translate
+cd ../../..
+./mach clang-format
+
+## How to add an element
+
+# First, add an entry to parser/htmlparser/nsHTMLTagList.h or dom/svg/SVGTagList.h!
+# Then, starting from the root of a mozilla-central checkout
+cd parser/html/java/
+make sync
+# now you have a clone of https://github.com/validator/htmlparser/tree/master in parser/html/java/htmlparser/
+cd htmlparser/src/
+$EDITOR nu/validator/htmlparser/impl/ElementName.java
+# Perform case-insensitive searches for "uncomment and uncomment stuff according to the comments that talk about uncommenting
+# Duplicate the declaration a normal element. Let's use "bdo", since it's the first normal one.
+# In the duplicate, replace BDO with the new name in all caps and "bdo" with the new name in quotes in lower case (twice).
+# Search for "BDO,", duplicate that line and change the duplicate to say the new name in all caps followed by comma.
+# Save.
+javac nu/validator/htmlparser/impl/ElementName.java
+java nu.validator.htmlparser.impl.ElementName ../../../../../parser/htmlparser/nsHTMLTagList.h ../../../../../dom/svg/SVGTagList.h
+# Copy and paste the output into nu/validator/htmlparser/impl/ElementName.java replacing the text below the comment "START GENERATED CODE" and above the very last "}".
+# Recomment the bits that you uncommented earlier.
+# Save.
+cd ../.. # Back to parser/html/java/
+make translate
+cd ../../..
+./mach clang-format
+
+Ben Newman (23 September 2009)
+Henri Sivonen (10 August 2017, 10 February 2020)