Refactor IDL value checking into SemanticAnalyzer.pm

Source/bindings/scripts/SemanticAnalyzer.pm

Index: Source/bindings/scripts/SemanticAnalyzer.pm
diff --git a/Source/bindings/scripts/SemanticAnalyzer.pm b/Source/bindings/scripts/SemanticAnalyzer.pm
new file mode 100755
index 0000000000000000000000000000000000000000..0755e950461ac068d0e7bad3492948f3bf59614f
--- /dev/null
+++ b/Source/bindings/scripts/SemanticAnalyzer.pm
@@ -0,0 +1,118 @@
+# Copyright (C) 2013 Google Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package SemanticAnalyzer;
+
+sub new
+{
+    my $class = shift;
+    my $idlAttributesFile = shift;
+
+    $idlAttributes = {};
+    open FH, "<", $idlAttributesFile or die "Couldn't open $idlAttributesFile: $!";
+    while (my $line = <FH>) {
+        chomp $line;
+        next if $line =~ /^\s*#/;
+        next if $line =~ /^\s*$/;
+
+        if ($line =~ /^\s*([^=\s]*)\s*=?\s*(.*)/) {
+            my $name = $1;
+            $idlAttributes{$name} = {};
+            if ($2) {
+                foreach my $rightValue (split /\|/, $2) {
+                    $rightValue =~ s/^\s*|\s*$//g;
+                    $rightValue = "VALUE_IS_MISSING" unless $rightValue;
+                    $idlAttributes{$name}{$rightValue} = 1;
+                }
+            } else {
+                $idlAttributes{$name}{"VALUE_IS_MISSING"} = 1;
+            }
+        } else {
+            die "The format of " . basename($idlAttributesFile) . " is wrong: line $.\n";
+        }
+    }
+    close FH;
+
+    my $reference = { };
+    bless($reference, $class);
+    return $reference;
+}
+
+sub checkIDLAttributes
+{
+    my $object = shift;
+    my $document = shift;
+    my $idlFile = shift;
+
+    foreach my $interface (@{$document->interfaces}) {
+        $object->checkIfIDLAttributesExists($idlAttributes, $interface->extendedAttributes, $idlFile);
+
+        foreach my $attribute (@{$interface->attributes}) {
+            $object->checkIfIDLAttributesExists($idlAttributes, $attribute->signature->extendedAttributes, $idlFile);
+        }
+
+        foreach my $function (@{$interface->functions}) {
+            $object->checkIfIDLAttributesExists($idlAttributes, $function->signature->extendedAttributes, $idlFile);
+            foreach my $parameter (@{$function->parameters}) {
+                $object->checkIfIDLAttributesExists($idlAttributes, $parameter->extendedAttributes, $idlFile);
+            }
+        }
+    }
+}
+
+sub checkIfIDLAttributesExists
+{
+    my $object = shift;
+    my $extendedAttributes = shift;
+    my $idlFile = shift;
+
+    my $error;
+    OUTER: for my $name (keys %$extendedAttributes) {
+        if (!exists $object->idlAttributes->{$name}) {
+        # if (!exists $idlAttributes->{$name}) {
+            $error = "Unknown IDL attribute [$name] is found at $idlFile.";
+            last OUTER;
+        }
+        if ($object->idlAttributes->{$name}{"*"}) {
+            next;
+        }
+        for my $rightValue (split /\s*\|\s*/, $extendedAttributes->{$name}) {
+            if (!exists $object->idlAttributes->{$name}{$rightValue}) {
+                $error = "Unknown IDL attribute [$name=" . $extendedAttributes->{$name} . "] is found at $idlFile.";
+                last OUTER;
+            }
+        }
+    }
+    if ($error) {
+        die "IDL ATTRIBUTE CHECKER ERROR: $error
+If you want to add a new IDL attribute, you need to add it to bindings/scripts/IDLAttributes.txt and add explanations to the Blink IDL document (http://chromium.org/blink/webidl).
+";
+    }
+}
+
+1;