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      1 #!/usr/bin/perl -w
      2 
      3 # Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
      4 #
      5 # Redistribution and use in source and binary forms, with or without
      6 # modification, are permitted provided that the following conditions
      7 # are met:
      8 #
      9 # 1.  Redistributions of source code must retain the above copyright
     10 #     notice, this list of conditions and the following disclaimer.
     11 # 2.  Redistributions in binary form must reproduce the above copyright
     12 #     notice, this list of conditions and the following disclaimer in the
     13 #     documentation and/or other materials provided with the distribution.
     14 # 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15 #     its contributors may be used to endorse or promote products derived
     16 #     from this software without specific prior written permission.
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19 # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21 # DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22 # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 
     29 # Used for helping remove extra blank lines from files when processing.
     30 # see split-class for an example usage (or other scripts in bugzilla)
     31 
     32 BEGIN {
     33    use Exporter   ();
     34    our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
     35    $VERSION     = 1.00;
     36    @ISA         = qw(Exporter);
     37    @EXPORT      = qw(&resetSpacingHeuristics &isOnlyWhiteSpace &applySpacingHeuristicsAndPrint &setPreviousAllowedLine &setPreviousAllowedLine &printPendingEmptyLines &ignoringLine);
     38    %EXPORT_TAGS = ();
     39    @EXPORT_OK   = ();
     40 }
     41 
     42 our @EXPORT_OK;
     43 
     44 my $justFoundEmptyLine = 0;
     45 my $previousLineWasDisallowed = 0;
     46 my $previousAllowedLine = "";
     47 my $pendingEmptyLines = "";
     48 
     49 sub resetSpacingHeuristics
     50 {
     51     $justFoundEmptyLine = 0;
     52     $previousLineWasDisallowed = 0;
     53     $previousAllowedLine = "";
     54     $pendingEmptyLines = "";
     55 }
     56 
     57 sub isOnlyWhiteSpace
     58 {
     59     my $line = shift;
     60     my $isOnlyWhiteSpace = ($line =~ m/^\s+$/);
     61     $pendingEmptyLines .= $line if ($isOnlyWhiteSpace);
     62     return $isOnlyWhiteSpace;
     63 }
     64 
     65 sub applySpacingHeuristicsAndPrint
     66 {
     67     my ($out, $line) = @_;
     68 
     69     printPendingEmptyLines($out, $line);
     70     $previousLineWasDisallowed = 0;
     71     print $out $line;
     72 }
     73 
     74 sub setPreviousAllowedLine
     75 {
     76     my $line = shift;
     77     $previousAllowedLine = $line;
     78 }
     79 
     80 sub printPendingEmptyLines
     81 {
     82     my $out = shift;
     83     my $line = shift;
     84     if ($previousLineWasDisallowed) {
     85         if (!($pendingEmptyLines eq "") && !($previousAllowedLine =~ m/{\s*$/) && !($line =~ m/^\s*}/)) {
     86             $pendingEmptyLines = "\n";
     87         } else {
     88             $pendingEmptyLines = "";
     89         }
     90     }
     91     print $out $pendingEmptyLines;
     92     $pendingEmptyLines = "";
     93 }
     94 
     95 sub ignoringLine
     96 {
     97     # my $line = shift; # ignoring input argument
     98     $previousLineWasDisallowed = 1;
     99 }
    100 
    101 1;