Roll Observatory packages and add a roll script

dart_style/lib/src/debug.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// Internal debugging utilities.
-library dart_style.src.debug;
-
-import 'dart:math' as math;
-
-import 'chunk.dart';
-import 'line_splitting/rule_set.dart';
-import 'rule/rule.dart';
-
-/// Set this to `true` to turn on diagnostic output while building chunks.
-bool traceChunkBuilder = false;
-
-/// Set this to `true` to turn on diagnostic output while writing lines.
-bool traceLineWriter = false;
-
-/// Set this to `true` to turn on diagnostic output while line splitting.
-bool traceSplitter = false;
-
-bool useAnsiColors = false;
-
-const unicodeSection = "\u00a7";
-const unicodeMidDot = "\u00b7";
-
-/// The whitespace prefixing each line of output.
-String _indent = "";
-
-void indent() {
-  _indent = "  $_indent";
-}
-
-void unindent() {
-  _indent = _indent.substring(2);
-}
-
-/// Constants for ANSI color escape codes.
-final _cyan = _color("\u001b[36m");
-final _gray = _color("\u001b[1;30m");
-final _green = _color("\u001b[32m");
-final _red = _color("\u001b[31m");
-final _magenta = _color("\u001b[35m");
-final _none = _color("\u001b[0m");
-final _noColor = _color("\u001b[39m");
-final _bold = _color("\u001b[1m");
-
-/// Prints [message] to stdout with each line correctly indented.
-void log([message]) {
-  if (message == null) {
-    print("");
-    return;
-  }
-
-  print(_indent + message.toString().replaceAll("\n", "\n$_indent"));
-}
-
-/// Wraps [message] in gray ANSI escape codes if enabled.
-String gray(message) => "$_gray$message$_none";
-
-/// Wraps [message] in green ANSI escape codes if enabled.
-String green(message) => "$_green$message$_none";
-
-/// Wraps [message] in bold ANSI escape codes if enabled.
-String bold(message) => "$_bold$message$_none";
-
-/// Prints [chunks] to stdout, one chunk per line, with detailed information
-/// about each chunk.
-void dumpChunks(int start, List<Chunk> chunks) {
-  if (chunks.isEmpty) return;
-
-  // Show the spans as vertical bands over their range.
-  var spans = new Set();
-  addSpans(chunks) {
-    for (var chunk in chunks) {
-      spans.addAll(chunk.spans);
-
-      addSpans(chunk.blockChunks);
-    }
-  }
-
-  addSpans(chunks);
-
-  spans = spans.toList();
-
-  var rules = chunks
-      .map((chunk) => chunk.rule)
-      .where((rule) => rule != null && rule is! HardSplitRule)
-      .toSet();
-
-  var rows = [];
-
-  addChunk(chunk, prefix, index) {
-    var row = [];
-    row.add("$prefix$index:");
-
-    if (chunk.text.length > 70) {
-      row.add(chunk.text.substring(0, 70));
-    } else {
-      row.add(chunk.text);
-    }
-
-    var spanBars = "";
-    for (var span in spans) {
-      spanBars += chunk.spans.contains(span) ? "|" : " ";
-    }
-    row.add(spanBars);
-
-    writeIf(predicate, String callback()) {
-      if (predicate) {
-        row.add(callback());
-      } else {
-        row.add("");
-      }
-    }
-
-    if (chunk.rule != null) {
-      row.add(chunk.isHardSplit ? "" : chunk.rule.toString());
-
-      var outerRules = chunk.rule.outerRules.toSet().intersection(rules);
-      writeIf(outerRules.isNotEmpty, () => "-> ${outerRules.join(" ")}");
-    } else {
-      row.add("(no rule)");
-
-      // Outer rules.
-      row.add("");
-    }
-
-    writeIf(chunk.indent != null && chunk.indent != 0,
-        () => "indent ${chunk.indent}");
-
-    writeIf(chunk.nesting != null && chunk.nesting != 0,
-        () => "nest ${chunk.nesting}");
-
-    writeIf(chunk.flushLeft != null && chunk.flushLeft, () => "flush");
-
-    rows.add(row);
-
-    for (var j = 0; j < chunk.blockChunks.length; j++) {
-      addChunk(chunk.blockChunks[j], "$prefix$index.", j);
-    }
-  }
-
-  var i = start;
-  for (var chunk in chunks) {
-    addChunk(chunk, "", i);
-    i++;
-  }
-
-  var rowWidths = new List.filled(rows.first.length, 0);
-  for (var row in rows) {
-    for (var i = 0; i < row.length; i++) {
-      rowWidths[i] = math.max(rowWidths[i], row[i].length);
-    }
-  }
-
-  var buffer = new StringBuffer();
-  for (var row in rows) {
-    for (var i = 0; i < row.length; i++) {
-      var cell = row[i].padRight(rowWidths[i]);
-
-      if (i != 1) cell = gray(cell);
-
-      buffer.write(cell);
-      buffer.write("  ");
-    }
-
-    buffer.writeln();
-  }
-
-  print(buffer.toString());
-}
-
-/// Convert the line to a [String] representation.
-///
-/// It will determine how best to split it into multiple lines of output and
-/// return a single string that may contain one or more newline characters.
-void dumpLines(List<Chunk> chunks, int firstLineIndent, SplitSet splits) {
-  var buffer = new StringBuffer();
-
-  writeIndent(indent) => buffer.write(gray("| " * (indent ~/ 2)));
-
-  writeChunksUnsplit(List<Chunk> chunks) {
-    for (var chunk in chunks) {
-      buffer.write(chunk.text);
-      if (chunk.spaceWhenUnsplit) buffer.write(" ");
-
-      // Recurse into the block.
-      writeChunksUnsplit(chunk.blockChunks);
-    }
-  }
-
-  writeIndent(firstLineIndent);
-
-  for (var i = 0; i < chunks.length - 1; i++) {
-    var chunk = chunks[i];
-    buffer.write(chunk.text);
-
-    if (splits.shouldSplitAt(i)) {
-      for (var j = 0; j < (chunk.isDouble ? 2 : 1); j++) {
-        buffer.writeln();
-        writeIndent(splits.getColumn(i));
-      }
-    } else {
-      writeChunksUnsplit(chunk.blockChunks);
-
-      if (chunk.spaceWhenUnsplit) buffer.write(" ");
-    }
-  }
-
-  buffer.write(chunks.last.text);
-  log(buffer);
-}
-
-String _color(String ansiEscape) => useAnsiColors ? ansiEscape : "";