Add support for [NoInterfaceObject] extended attribute to bindings generator

Source/bindings/scripts/preprocess-idls.pl

 #!/usr/bin/perl -w
 #
 # Copyright (C) 2011 Google Inc.  All rights reserved.
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Library General Public
 # License as published by the Free Software Foundation; either
 # version 2 of the License, or (at your option) any later version.
 #
 # This library is distributed in the hope that it will be useful,
@@ skipping 10 matching lines @@
 use strict;
 
 use File::Basename;
 use Getopt::Long;
 use Cwd;
 
 my $defines;
 my $preprocessor;
 my $idlFilesList;
 my $supplementalDependencyFile;
+my $windowConstructorsSupplementalFile;

[haraken, 2013/05/07 05:33:55]

Nit: Shall we rename $windowConstructorsSupplementalFile to
$windowConstructorsFile ? It's unrelated to Supplemental.

 my $supplementalMakefileDeps;
 
 GetOptions('defines=s' => \$defines,
            'preprocessor=s' => \$preprocessor,
            'idlFilesList=s' => \$idlFilesList,
            'supplementalDependencyFile=s' => \$supplementalDependencyFile,
+           'windowConstructorsSupplementalFile=s' => \$windowConstructorsSupplementalFile,
            'supplementalMakefileDeps=s' => \$supplementalMakefileDeps);
 
 die('Must specify an output file using --supplementalDependencyFile.') unless defined($supplementalDependencyFile);
+die('Must specify an output file using --windowConstructorsSupplementalFile.') unless defined($windowConstructorsSupplementalFile);
 die('Must specify the file listing all IDLs using --idlFilesList.') unless defined($idlFilesList);
 
 open FH, "< $idlFilesList" or die "Cannot open $idlFilesList\n";
 my @idlFiles = <FH>;
 chomp(@idlFiles);
 close FH;
 
 # Parse all IDL files.
 my %interfaceNameToIdlFile;
 my %idlFileToInterfaceName;
 my %supplementalDependencies;
 my %supplementals;
+my $constructorAttributesCode = "";
 foreach my $idlFile (@idlFiles) {
     my $fullPath = Cwd::realpath($idlFile);
-    my $partialInterfaceName = getPartialInterfaceNameFromIDLFile($fullPath);
+    my $idlFileContents = getFileContents($fullPath);
+    my $partialInterfaceName = getPartialInterfaceNameFromIDL($idlFileContents);
     if ($partialInterfaceName) {
         $supplementalDependencies{$fullPath} = $partialInterfaceName;
+        next;
     }
     my $interfaceName = fileparse(basename($idlFile), ".idl");
+    unless (isCallbackInterfaceFromIDL($idlFileContents)) {
+        my $extendedAttributes = getInterfaceExtendedAttributesFromIDL($idlFileContents);
+        unless ($extendedAttributes->{"NoInterfaceObject"}) {
+            $constructorAttributesCode .= GenerateConstructorAttribute($interfaceName, $extendedAttributes);
+        }
+    }
     $interfaceNameToIdlFile{$interfaceName} = $fullPath;
     $idlFileToInterfaceName{$fullPath} = $interfaceName;
     $supplementals{$fullPath} = [];
 }
 
+# Generate DOMWindow Constructors partial interface.
+open PARTIAL_WINDOW_FH, "> $windowConstructorsSupplementalFile" or die "Cannot open $windowConstructorsSupplementalFile\n";
+print PARTIAL_WINDOW_FH "partial interface DOMWindow {\n";
+print PARTIAL_WINDOW_FH $constructorAttributesCode;
+print PARTIAL_WINDOW_FH "};\n";
+close PARTIAL_WINDOW_FH;
+$supplementalDependencies{$windowConstructorsSupplementalFile} = "DOMWindow";
+
 # Resolves partial interfaces dependencies.
 foreach my $idlFile (keys %supplementalDependencies) {
     my $baseFile = $supplementalDependencies{$idlFile};
     my $targetIdlFile = $interfaceNameToIdlFile{$baseFile};
     push(@{$supplementals{$targetIdlFile}}, $idlFile);
     delete $supplementals{$idlFile};
 }
 
 # Outputs the dependency.
 # The format of a supplemental dependency file:
 #
 # DOMWindow.idl P.idl Q.idl R.idl
 # Document.idl S.idl
 # Event.idl
 # ...
 #
 # The above indicates that DOMWindow.idl is supplemented by P.idl, Q.idl and R.idl,
 # Document.idl is supplemented by S.idl, and Event.idl is supplemented by no IDLs.
 # The IDL that supplements another IDL (e.g. P.idl) never appears in the dependency file.
 
 open FH, "> $supplementalDependencyFile" or die "Cannot open $supplementalDependencyFile\n";
 
 foreach my $idlFile (sort keys %supplementals) {
     print FH $idlFile, " @{$supplementals{$idlFile}}\n";
 }
 close FH;
 
-
 if ($supplementalMakefileDeps) {
     open MAKE_FH, "> $supplementalMakefileDeps" or die "Cannot open $supplementalMakefileDeps\n";
     my @all_dependencies = [];
     foreach my $idlFile (sort keys %supplementals) {
         my $basename = $idlFileToInterfaceName{$idlFile};
 
         my @dependencies = map { basename($_) } @{$supplementals{$idlFile}};
 
         print MAKE_FH "JS${basename}.h: @{dependencies}\n";
         print MAKE_FH "DOM${basename}.h: @{dependencies}\n";
         print MAKE_FH "WebDOM${basename}.h: @{dependencies}\n";
         foreach my $dependency (@dependencies) {
             print MAKE_FH "${dependency}:\n";
         }
     }
 
     close MAKE_FH;
 }
 
+sub GenerateConstructorAttribute
+{
+    my $interfaceName = shift;
+    my $extendedAttributes = shift;
 
-sub getPartialInterfaceNameFromIDLFile
+    my $code = "    ";
+    my @extendedAttributesList;
+    foreach my $attributeName (keys $extendedAttributes) {
+      next unless ($attributeName eq "Conditional" || $attributeName eq "EnabledAtRuntime" || $attributeName eq "EnabledPerContext");
+      my $extendedAttribute = $attributeName;
+      $extendedAttribute .= "=" . $extendedAttributes->{$attributeName} unless $extendedAttributes->{$attributeName} eq "VALUE_IS_MISSING";
+      push(@extendedAttributesList, $extendedAttribute);
+    }
+    $code .= "[" . join(', ', @extendedAttributesList) . "] " if @extendedAttributesList;
+
+    my $originalInterfaceName = $interfaceName;
+    $interfaceName = $extendedAttributes->{"InterfaceName"} if $extendedAttributes->{"InterfaceName"};
+    $code .= "attribute " . $originalInterfaceName . "Constructor $interfaceName;\n";
+
+    # In addition to the regular property, for every [NamedConstructor] extended attribute on an interface,
+    # a corresponding property MUST exist on the ECMAScript global object.
+    if ($extendedAttributes->{"NamedConstructor"}) {
+        my $constructorName = $extendedAttributes->{"NamedConstructor"};
+        $constructorName =~ s/\(.*//g; # Extract function name.
+        $code .= "    ";
+        $code .= "[" . join(', ', @extendedAttributesList) . "] " if @extendedAttributesList;
+        $code .= "attribute " . $originalInterfaceName . "ConstructorConstructor $constructorName;\n";
+    }
+    return $code;
+}
+
+sub getFileContents
 {
     my $idlFile = shift;
 
     open FILE, "<", $idlFile;
     my @lines = <FILE>;
     close FILE;
 
-    my $fileContents = join('', @lines);
+    # Filter out preprocessor lines.
+    @lines = grep(!/^\s*#/, @lines);
+
+    return join('', @lines);
+}
+
+sub getPartialInterfaceNameFromIDL
+{
+    my $fileContents = shift;
+
     if ($fileContents =~ /partial\s+interface\s+(\w+)/gs) {
         return $1;
     }
 }
+
+sub isCallbackInterfaceFromIDL
+{
+    my $fileContents = shift;
+    return ($fileContents =~ /callback\s+interface\s+\w+/gs);
+}
+
+sub trim
+{
+    my $string = shift;
+    $string =~ s/^\s+|\s+$//g;
+    return $string;
+}
+
+sub getInterfaceExtendedAttributesFromIDL
+{
+    my $fileContents = shift;
+
+    my $extendedAttributes = {};
+
+    if ($fileContents =~ /\[(.*)\]\s+(interface|exception)\s+(\w+)/gs) {
+        my @parts = split(',', $1);
+        foreach my $part (@parts) {
+            my @keyValue = split('=', $part);
+            my $key = trim($keyValue[0]);
+            next unless length($key);
+            my $value = "VALUE_IS_MISSING";
+            $value = trim($keyValue[1]) if @keyValue > 1;
+            $extendedAttributes->{$key} = $value;
+        }
+    }
+
+    return $extendedAttributes;
+}