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Unified Diff: pkg/compiler/lib/src/source_file.dart

Issue 693183006: Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler" (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 1 month ago
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Index: pkg/compiler/lib/src/source_file.dart
diff --git a/pkg/compiler/lib/src/source_file.dart b/pkg/compiler/lib/src/source_file.dart
deleted file mode 100644
index b3566385a97c23f3af4281cb9568f42863b10e54..0000000000000000000000000000000000000000
--- a/pkg/compiler/lib/src/source_file.dart
+++ /dev/null
@@ -1,222 +0,0 @@
-// Copyright (c) 2012, 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.
-
-library source_file;
-
-import 'dart:math';
-import 'dart:convert' show UTF8;
-
-/**
- * Represents a file of source code. The content can be either a [String] or
- * a UTF-8 encoded [List<int>] of bytes.
- */
-abstract class SourceFile {
-
- /** The name of the file. */
- String get filename;
-
- /** The text content of the file represented as a String. */
- String slowText();
-
- /** The content of the file represented as a UTF-8 encoded [List<int>]. */
- List<int> slowUtf8Bytes();
-
- /**
- * The length of the string representation of this source file, i.e.,
- * equivalent to [:slowText().length:], but faster.
- */
- int get length;
-
- /**
- * Sets the string length of this source file. For source files based on UTF-8
- * byte arrays, the string length is computed and assigned by the scanner.
- */
- set length(int v);
-
- /**
- * A map from line numbers to offsets in the string text representation of
- * this source file.
- */
- List<int> get lineStarts {
- if (lineStartsCache == null) {
- // When reporting errors during scanning, the line numbers are not yet
- // available and need to be computed using this slow path.
- lineStartsCache = lineStartsFromString(slowText());
- }
- return lineStartsCache;
- }
-
- /**
- * Sets the line numbers map for this source file. This map is computed and
- * assigned by the scanner, avoiding a separate traversal of the source file.
- *
- * The map contains one additional entry at the end of the file, as if the
- * source file had one more empty line at the end. This simplifies the binary
- * search in [getLine].
- */
- set lineStarts(List<int> v) => lineStartsCache = v;
-
- List<int> lineStartsCache;
-
- List<int> lineStartsFromString(String text) {
- var starts = [0];
- var index = 0;
- while (index < text.length) {
- index = text.indexOf('\n', index) + 1;
- if (index <= 0) break;
- starts.add(index);
- }
- starts.add(text.length + 1); // One additional line start at the end.
- return starts;
- }
-
- /**
- * Returns the line number for the offset [position] in the string
- * representation of this source file.
- */
- int getLine(int position) {
- List<int> starts = lineStarts;
- if (position < 0 || starts.last <= position) {
- throw 'bad position #$position in file $filename with '
- 'length ${length}.';
- }
- int first = 0;
- int count = starts.length;
- while (count > 1) {
- int step = count ~/ 2;
- int middle = first + step;
- int lineStart = starts[middle];
- if (position < lineStart) {
- count = step;
- } else {
- first = middle;
- count -= step;
- }
- }
- return first;
- }
-
- /**
- * Returns the column number for the offset [position] in the string
- * representation of this source file.
- */
- int getColumn(int line, int position) {
- return position - lineStarts[line];
- }
-
- String slowSubstring(int start, int end);
-
- /**
- * Create a pretty string representation for [message] from a character
- * range `[start, end]` in this file.
- *
- * If [includeSourceLine] is `true` the first source line code line that
- * contains the range will be included as well as marker characters ('^')
- * underlining the range.
- *
- * Use [colorize] to wrap source code text and marker characters in color
- * escape codes.
- */
- String getLocationMessage(String message, int start, int end,
- {bool includeSourceLine: true,
- String colorize(String text)}) {
- if (colorize == null) {
- colorize = (text) => text;
- }
- var line = getLine(start);
- var column = getColumn(line, start);
-
- var buf = new StringBuffer('${filename}:');
- if (start != end || start != 0) {
- // Line/column info is relevant.
- buf.write('${line + 1}:${column + 1}:');
- }
- buf.write('\n$message\n');
-
- if (start != end && includeSourceLine) {
- String textLine;
- // +1 for 0-indexing, +1 again to avoid the last line of the file
- if ((line + 2) < lineStarts.length) {
- textLine = slowSubstring(lineStarts[line], lineStarts[line+1]);
- } else {
- textLine = '${slowSubstring(lineStarts[line], length)}\n';
- }
-
- int toColumn = min(column + (end-start), textLine.length);
- buf.write(textLine.substring(0, column));
- buf.write(colorize(textLine.substring(column, toColumn)));
- buf.write(textLine.substring(toColumn));
-
- int i = 0;
- for (; i < column; i++) {
- buf.write(' ');
- }
-
- for (; i < toColumn; i++) {
- buf.write(colorize('^'));
- }
- }
-
- return buf.toString();
- }
-}
-
-class Utf8BytesSourceFile extends SourceFile {
- final String filename;
-
- /** The UTF-8 encoded content of the source file. */
- final List<int> content;
-
- Utf8BytesSourceFile(this.filename, this.content);
-
- String slowText() => UTF8.decode(content);
-
- List<int> slowUtf8Bytes() => content;
-
- String slowSubstring(int start, int end) {
- // TODO(lry): to make this faster, the scanner could record the UTF-8 slack
- // for all positions of the source text. We could use [:content.sublist:].
- return slowText().substring(start, end);
- }
-
- int get length {
- if (lengthCache == -1) {
- // During scanning the length is not yet assigned, so we use a slow path.
- length = slowText().length;
- }
- return lengthCache;
- }
- set length(int v) => lengthCache = v;
- int lengthCache = -1;
-}
-
-class CachingUtf8BytesSourceFile extends Utf8BytesSourceFile {
- String cachedText;
-
- CachingUtf8BytesSourceFile(String filename, List<int> content)
- : super(filename, content);
-
- String slowText() {
- if (cachedText == null) {
- cachedText = super.slowText();
- }
- return cachedText;
- }
-}
-
-class StringSourceFile extends SourceFile {
- final String filename;
- final String text;
-
- StringSourceFile(this.filename, this.text);
-
- int get length => text.length;
- set length(int v) { }
-
- String slowText() => text;
-
- List<int> slowUtf8Bytes() => UTF8.encode(text);
-
- String slowSubstring(int start, int end) => text.substring(start, end);
-}
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