diff -r 000000000000 -r 4f2f89ce4247 WebCore/dom/ViewportArguments.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/dom/ViewportArguments.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
+ *
+ * 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,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "ViewportArguments.h"
+
+#include "Chrome.h"
+#include "Console.h"
+#include "DOMWindow.h"
+#include "Document.h"
+#include "Frame.h"
+#include "Page.h"
+#include "PlatformString.h"
+#include "ScriptableDocumentParser.h"
+
+namespace WebCore {
+
+void setViewportFeature(const String& keyString, const String& valueString, Document* document, void* data)
+{
+    ViewportArguments* arguments = static_cast<ViewportArguments*>(data);
+    float value = ViewportArguments::ValueUndefined;
+    bool didUseConstants = false;
+
+    if (equalIgnoringCase(valueString, "yes"))
+        value = 1;
+    else if (equalIgnoringCase(valueString, "device-width")) {
+        didUseConstants = true;
+        if (document->page())
+            value = document->page()->chrome()->windowRect().width();
+    } else if (equalIgnoringCase(valueString, "device-height")) {
+        didUseConstants = true;
+        if (document->page())
+            value = document->page()->chrome()->windowRect().height();
+    } else if (equalIgnoringCase(valueString, "default")) // This allows us to distinguish the omission of a key from asking for the default value.
+        value = -2;
+    else if (valueString.length()) // listing a key with no value is shorthand for key=default
+        value = valueString.toFloat();
+
+    if (keyString == "initial-scale")
+        arguments->initialScale = value;
+    else if (keyString == "minimum-scale")
+        arguments->minimumScale = value;
+    else if (keyString == "maximum-scale") {
+        arguments->maximumScale = value;
+        if (value > 10.0)
+            reportViewportWarning(document, MaximumScaleTooLargeError, keyString);
+    } else if (keyString == "user-scalable")
+        arguments->userScalable = value;
+    else if (keyString == "width") {
+        if (document->page() && value == document->page()->chrome()->windowRect().width() && !didUseConstants)
+            reportViewportWarning(document, DeviceWidthShouldBeUsedWarning, keyString);
+        else if (document->page() && value == document->page()->chrome()->windowRect().height() && !didUseConstants)
+            reportViewportWarning(document, DeviceHeightShouldBeUsedWarning, keyString);
+
+        arguments->width = value;
+    } else if (keyString == "height") {
+        if (document->page() && value == document->page()->chrome()->windowRect().width() && !didUseConstants)
+            reportViewportWarning(document, DeviceWidthShouldBeUsedWarning, keyString);
+        else if (document->page() && value == document->page()->chrome()->windowRect().height() && !didUseConstants)
+            reportViewportWarning(document, DeviceHeightShouldBeUsedWarning, keyString);
+        
+        arguments->height = value;
+    } else
+        reportViewportWarning(document, UnrecognizedViewportArgumentError, keyString);
+}
+
+static const char* viewportErrorMessageTemplate(ViewportErrorCode errorCode)
+{
+    static const char* const errors[] = { 
+        "Viewport width or height set to physical device width, try using \"device-width\" constant instead for future compatibility.",
+        "Viewport height or height set to physical device height, try using \"device-height\" constant instead for future compatibility.",
+        "Viewport argument \"%replacement\" not recognized. Content ignored.",
+        "Viewport maximum-scale cannot be larger than 10.0.  The maximum-scale will be set to 10.0."
+    };
+
+    return errors[errorCode];
+}
+
+static MessageLevel viewportErrorMessageLevel(ViewportErrorCode errorCode)
+{
+    return errorCode == UnrecognizedViewportArgumentError || errorCode == MaximumScaleTooLargeError ? ErrorMessageLevel : TipMessageLevel;
+}
+
+// FIXME: Why is this different from SVGDocumentExtensions parserLineNumber?
+// FIXME: Callers should probably use ScriptController::eventHandlerLineNumber()
+static int parserLineNumber(Document* document)
+{
+    if (!document)
+        return 0;
+    ScriptableDocumentParser* parser = document->scriptableDocumentParser();
+    if (!parser)
+        return 0;
+    return parser->lineNumber() + 1;
+}
+
+void reportViewportWarning(Document* document, ViewportErrorCode errorCode, const String& replacement)
+{
+    Frame* frame = document->frame();
+    if (!frame)
+        return;
+
+    String message = viewportErrorMessageTemplate(errorCode);
+    message.replace("%replacement", replacement);
+
+    frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, viewportErrorMessageLevel(errorCode), message, parserLineNumber(document), document->url().string());
+}
+
+} // namespace WebCore