Examples of com.google.clearsilver.jsilver.syntax.StructuralWhitespaceStripper

com.google.clearsilver.jsilver.syntax.StructuralWhitespaceStripper

Detects sequences of commands corresponding to a line in the template containing only structural commands, comments or whitespace and rewrites the syntax tree to effectively remove any data (text) associated with that line (including the trailing whitespace).

A structural command is any command that never emits any output. These come in three types:

Commands that can contain other commands (eg, "alt", "each", "escape", "if", "loop", "with", etc...).
Commands that operate on the template itself (eg, "include", "autoescape", etc...).
Comments.

This makes it much easier to write human readable templates in cases where the output format is whitespace sensitive.

Thus the input:

 {@literal ---------------- Value is: 0 ?> positive  negative  zero . ----------------}

is equivalent to:

 {@literal ---------------- Value is: 0 ?>  positive   negative   zero . ----------------}

but is much easier to read.

Where data commands become empty they are replaced with Noop commands, which effectively removes them from the tree. These can be removed (if needed) by a later optimization step but shouldn't cause any issues.

    OptimizerProvider stripStructuralWhitespaceProvider = null;
    if (options.getStripStructuralWhiteSpace()) {
      // StructuralWhitespaceStripper has state so create a new one each time.
      stripStructuralWhitespaceProvider = new OptimizerProvider() {
        public Switch getOptimizer() {
          return new StructuralWhitespaceStripper();
        }
      };
    }


    return new OptimizingTemplateFactory(templateFactory, dataCommandConsolidatorProvider,

Examples of com.google.clearsilver.jsilver.syntax.StructuralWhitespaceStripper

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