I've updated the repo with an updated String::align and switched the compiler to use the String::align method instead of it's own version. I also updated the sample.
> On Apr 17, 2019, at 4:58 PM, Jim Laskey <james.las...@oracle.com> wrote: > > I pushed changes to http://hg.openjdk.java.net/amber/amber > <http://hg.openjdk.java.net/amber/amber> string-tapas branch to reflect the > incidental whitespace discussion. What is implemented is what Brian described > as > > Version 2 of the algorithm — the “significant closing delimiter” version — is: > - Strip leading and trailing blanks (perhaps limited to one each only) > - Compute the maximal common whitespace prefix of the remaining lines, > _including the stripped trailing blank line from above, if any_, and trim > that off > - If a blank last line was trimmed, add back a newline > > With strip leading and trailing blanks limited to one each. > > I also added a "super escape" \~ to opt out of auto align. > > > Example: > > String l = """\~ > +--------+ > | text | > +--------+ > """; // what opt out might look like > > Actual: > > \n > .......................+--------+\n > .......................| text |\n > .......................+--------+\n > ................... > > > Note that the String#align needs tweaking to reflect the algorithm (needs to > add closing delimiter influence). > > There is a sampler at > http://cr.openjdk.java.net/~jlaskey/Strings/AutoAlign.java > <http://cr.openjdk.java.net/~jlaskey/Strings/AutoAlign.java> (included below > as well) that shows the examples from my original (1a) incidental whitespace > e-mail. > > Cheers, > > -- Jim > > _____________________________________________________________________________________________________________ > > public class AutoAlign { > public static void report(String label, String result) { > System.out.format("Result of variable %s%n", label); > String formatted = result.replaceAll(" ", ".") > .replaceAll("\n", "\\\\n\n"); > System.out.format("%s%n%n", formatted); > } > > public static void main(String... args) throws Exception { > String a = """ > +--------+ > | text | > +--------+ > """; // first characters in first column? > > String b = """ > +--------+ > | text | > +--------+ > """; // first characters in first column or indented four > spaces? > > String c = """ > +--------+ > | text | > +--------+ > """; // first characters in first column or indented several? > > String d = """ > +--------+ > | text | > +--------+ > """; // first characters in first column or indented four? > > String e = > """ > +--------+ > | text | > +--------+ > """; // heredoc? > > String f = """ > > > +--------+ > | text | > +--------+ > > > """; // one or all leading or trailing blank lines > stripped? > > String g = """ > +--------+ > | text | > +--------+"""; // Last \n dropped > > String h = """+--------+ > | text | > +--------+"""; // determine indent of first line using > scanner knowledge? > > String i = """ "nested" """; // strip leading/trailing space? > > String name = " methodName"; > String j = (""" > public static void """ + name + """(String... args) { > System.out.println(String.join(args)); > } > """).align(); // how do we handle expressions with > multi-line strings? > > String k = String.format(""" > public static void %s(String... args) { > System.out.println(String.join(args)); > } > """, name); // is this the answer to multi-line string > expressions? > > String l = """\~ > +--------+ > | text | > +--------+ > """; // what opt out might look like > > report("a", a); > report("b", b); > report("c", c); > report("d", d); > report("e", e); > report("f", f); > report("g", g); > report("h", h); > report("i", i); > report("j", j); > report("k", k); > report("l", l); > } > } > > _____________________________________________________________________________________________________________ > > Result of variable a > +--------+\n > |..text..|\n > +--------+\n > > > Result of variable b > ....+--------+\n > ....|..text..|\n > ....+--------+\n > > > Result of variable c > ...............+--------+\n > ...............|..text..|\n > ...............+--------+\n > > > Result of variable d > ....+--------+\n > ....|..text..|\n > ....+--------+\n > > > Result of variable e > +--------+\n > |..text..|\n > +--------+\n > > > Result of variable f > \n > \n > ....+--------+\n > ....|..text..|\n > ....+--------+\n > \n > \n > > > Result of variable g > +--------+\n > |..text..|\n > +--------+ > > Result of variable h > +--------+\n > |..text..|\n > +--------+ > > Result of variable i > "nested" > > Result of variable j > public.static.void.methodName(String....args).{\n > ..........System.out.println(String.join(args));\n > ......}\n > > > Result of variable k > ......public.static.void..methodName(String....args).{\n > ..........System.out.println(String.join(args));\n > ......}\n > > > Result of variable l > \n > .......................+--------+\n > .......................|..text..|\n > .......................+--------+\n > ................... > > > > >
