Introduce SourceLocation to be used for console messages.

third_party/WebKit/Source/bindings/core/v8/SourceLocation.cpp

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "bindings/core/v8/SourceLocation.h"
+
+#include "bindings/core/v8/V8PerIsolateData.h"
+#include "core/dom/Document.h"
+#include "core/dom/ExecutionContext.h"
+#include "core/dom/ScriptableDocumentParser.h"
+#include "core/html/HTMLFrameOwnerElement.h"
+#include "core/inspector/InspectorInstrumentation.h"
+#include "core/inspector/ThreadDebugger.h"
+#include "platform/ScriptForbiddenScope.h"
+#include "platform/TracedValue.h"
+#include "platform/v8_inspector/public/V8Debugger.h"
+
+namespace blink {
+
+namespace {
+
+PassOwnPtr<V8StackTrace> captureStackTrace()
+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    V8PerIsolateData* data = V8PerIsolateData::from(isolate);
+    if (!data->threadDebugger() || !isolate->InContext())
+        return nullptr;
+    size_t stackSize = 1;
+    if (InspectorInstrumentation::hasFrontends()) {
+        if (InspectorInstrumentation::consoleAgentEnabled(currentExecutionContext(isolate)))
+            stackSize = V8StackTrace::maxCallStackSizeToCapture;
+    }
+    ScriptForbiddenScope::AllowUserAgentScript allowScripting;
+    return data->threadDebugger()->debugger()->captureStackTrace(stackSize);
+}
+
+}
+
+// static
+PassOwnPtr<SourceLocation> SourceLocation::capture(const String& url, unsigned lineNumber, unsigned columnNumber)
+{
+    OwnPtr<V8StackTrace> stackTrace = captureStackTrace();
+    if (stackTrace && !stackTrace->isEmpty())
+        return SourceLocation::create(stackTrace->topSourceURL(), stackTrace->topLineNumber(), stackTrace->topColumnNumber(), std::move(stackTrace), 0);
+    return SourceLocation::create(url, lineNumber, columnNumber, std::move(stackTrace));
+}
+
+// static
+PassOwnPtr<SourceLocation> SourceLocation::capture(ExecutionContext* executionContext)
+{
+    OwnPtr<V8StackTrace> stackTrace = captureStackTrace();
+    if (stackTrace && !stackTrace->isEmpty())
+        return SourceLocation::create(stackTrace->topSourceURL(), stackTrace->topLineNumber(), stackTrace->topColumnNumber(), std::move(stackTrace), 0);
+
+    Document* document = executionContext && executionContext->isDocument() ? toDocument(executionContext) : nullptr;
+    if (document) {
+        unsigned lineNumber = 0;
+        if (document->scriptableDocumentParser() && !document->isInDocumentWrite()) {
+            if (document->scriptableDocumentParser()->isParsingAtLineNumber())
+                lineNumber = document->scriptableDocumentParser()->lineNumber().oneBasedInt();
+        }
+        return SourceLocation::create(document->url().getString(), lineNumber, 0, std::move(stackTrace));
+    }
+
+    return SourceLocation::create(executionContext ? executionContext->url().getString() : "", 0, 0, std::move(stackTrace));
+}
+
+// static
+PassOwnPtr<SourceLocation> SourceLocation::create(const String& url, unsigned lineNumber, unsigned columnNumber, PassOwnPtr<V8StackTrace> stackTrace, int scriptId)
+{
+    return adoptPtr(new SourceLocation(url, lineNumber, columnNumber, std::move(stackTrace), scriptId));
+}
+
+SourceLocation::SourceLocation(const String& url, unsigned lineNumber, unsigned columnNumber, PassOwnPtr<V8StackTrace> stackTrace, int scriptId)
+    : m_url(url)
+    , m_lineNumber(lineNumber)
+    , m_columnNumber(columnNumber)
+    , m_stackTrace(std::move(stackTrace))
+    , m_scriptId(scriptId)
+{
+}
+
+SourceLocation::~SourceLocation()
+{
+}
+
+} // namespace blink