Wire up the Inspector V8 Debugger

sky/engine/bindings/core/v8/ScriptRegexp.cpp

+/*
+ * Copyright (C) 2004, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Collabora Ltd.
+ * Copyright (C) 2011 Peter Varga (pvarga@webkit.org), University of Szeged
+ * 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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.
+ */
+
+#include "config.h"
+#include "bindings/core/v8/ScriptRegexp.h"
+
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8PerIsolateData.h"
+#include "bindings/core/v8/V8ScriptRunner.h"
+#include "platform/ScriptForbiddenScope.h"
+
+namespace blink {
+
+ScriptRegexp::ScriptRegexp(const String& pattern, TextCaseSensitivity caseSensitivity, MultilineMode multilineMode)
+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    v8::HandleScope handleScope(isolate);
+    v8::Context::Scope contextScope(V8PerIsolateData::from(isolate)->ensureScriptRegexpContext());
+    v8::TryCatch tryCatch;
+
+    unsigned flags = v8::RegExp::kNone;
+    if (caseSensitivity == TextCaseInsensitive)
+        flags |= v8::RegExp::kIgnoreCase;
+    if (multilineMode == MultilineEnabled)
+        flags |= v8::RegExp::kMultiline;
+
+    v8::Local<v8::RegExp> regex = v8::RegExp::New(v8String(isolate, pattern), static_cast<v8::RegExp::Flags>(flags));
+
+    // If the regex failed to compile we'll get an empty handle.
+    if (!regex.IsEmpty())
+        m_regex.set(isolate, regex);
+}
+
+int ScriptRegexp::match(const String& string, int startFrom, int* matchLength) const
+{
+    if (matchLength)
+        *matchLength = 0;
+
+    if (m_regex.isEmpty() || string.isNull())
+        return -1;
+
+    // v8 strings are limited to int.
+    if (string.length() > INT_MAX)
+        return -1;
+
+    ScriptForbiddenScope::AllowUserAgentScript allowScript;
+
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    v8::HandleScope handleScope(isolate);
+    v8::Context::Scope contextScope(V8PerIsolateData::from(isolate)->ensureScriptRegexpContext());
+    v8::TryCatch tryCatch;
+
+    v8::Local<v8::RegExp> regex = m_regex.newLocal(isolate);
+    v8::Local<v8::Function> exec = regex->Get(v8AtomicString(isolate, "exec")).As<v8::Function>();
+    v8::Handle<v8::Value> argv[] = { v8String(isolate, string.substring(startFrom)) };
+    v8::Local<v8::Value> returnValue = V8ScriptRunner::callInternalFunction(exec, regex, WTF_ARRAY_LENGTH(argv), argv, isolate);
+
+    if (tryCatch.HasCaught())
+        return -1;
+
+    // RegExp#exec returns null if there's no match, otherwise it returns an
+    // Array of strings with the first being the whole match string and others
+    // being subgroups. The Array also has some random properties tacked on like
+    // "index" which is the offset of the match.
+    //
+    // https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/RegExp/exec
+
+    ASSERT(!returnValue.IsEmpty());
+    if (!returnValue->IsArray())
+        return -1;
+
+    v8::Local<v8::Array> result = returnValue.As<v8::Array>();
+    int matchOffset = result->Get(v8AtomicString(isolate, "index"))->ToInt32()->Value();
+    if (matchLength) {
+        v8::Local<v8::String> match = result->Get(0).As<v8::String>();
+        *matchLength = match->Length();
+    }
+
+    return matchOffset + startFrom;
+}
+
+} // namespace blink