Move Document::execCommand() and queryCommand*() to "DocumentExecCommand.cpp"

third_party/WebKit/Source/core/editing/commands/DocumentExecCommand.cpp

+/*
+ * 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, 2009, 2011, 2012 Apple Inc. All
+ * rights reserved.
+ * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
+ * (http://www.torchmobile.com/)
+ * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) Research In Motion Limited 2010-2011. 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,
+ * 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 "core/dom/Document.h"
+
+#include "core/editing/Editor.h"
+#include "core/events/ScopedEventQueue.h"
+#include "core/html/TextControlElement.h"
+#include "core/inspector/ConsoleMessage.h"
+#include "platform/Histogram.h"
+#include "wtf/AutoReset.h"
+#include "wtf/StdLibExtras.h"
+
+namespace blink {
+
+namespace {
+
+Editor::Command command(Document* document, const String& commandName) {
+  LocalFrame* frame = document->frame();
+  if (!frame || frame->document() != document)
+    return Editor::Command();
+
+  document->updateStyleAndLayoutTree();
+  return frame->editor().createCommandFromDOM(commandName);
+}
+
+}  // namespace
+
+bool Document::execCommand(const String& commandName,
+                           bool,
+                           const String& value,
+                           ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError, "execCommand is only supported on HTML documents.");
+    return false;
+  }
+  if (focusedElement() && isTextControlElement(*focusedElement()))
+    UseCounter::count(*this, UseCounter::ExecCommandOnInputOrTextarea);
+
+  // We don't allow recursive |execCommand()| to protect against attack code.
+  // Recursive call of |execCommand()| could be happened by moving iframe
+  // with script triggered by insertion, e.g. <iframe src="javascript:...">
+  // <iframe onload="...">. This usage is valid as of the specification
+  // although, it isn't common use case, rather it is used as attack code.
+  if (m_isRunningExecCommand) {
+    String message =
+        "We don't execute document.execCommand() this time, because it is "
+        "called recursively.";
+    addConsoleMessage(
+        ConsoleMessage::create(JSMessageSource, WarningMessageLevel, message));
+    return false;
+  }
+  AutoReset<bool> executeScope(&m_isRunningExecCommand, true);
+
+  // Postpone DOM mutation events, which can execute scripts and change
+  // DOM tree against implementation assumption.
+  EventQueueScope eventQueueScope;
+  Editor::tidyUpHTMLStructure(*this);
+  Editor::Command editorCommand = command(this, commandName);
+
+  DEFINE_STATIC_LOCAL(SparseHistogram, editorCommandHistogram,
+                      ("WebCore.Document.execCommand"));
+  editorCommandHistogram.sample(editorCommand.idForHistogram());
+  return editorCommand.execute(value);
+}
+
+bool Document::queryCommandEnabled(const String& commandName,
+                                   ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "queryCommandEnabled is only supported on HTML documents.");
+    return false;
+  }
+
+  return command(this, commandName).isEnabled();
+}
+
+bool Document::queryCommandIndeterm(const String& commandName,
+                                    ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "queryCommandIndeterm is only supported on HTML documents.");
+    return false;
+  }
+
+  return command(this, commandName).state() == MixedTriState;
+}
+
+bool Document::queryCommandState(const String& commandName,
+                                 ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "queryCommandState is only supported on HTML documents.");
+    return false;
+  }
+
+  return command(this, commandName).state() == TrueTriState;
+}
+
+bool Document::queryCommandSupported(const String& commandName,
+                                     ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "queryCommandSupported is only supported on HTML documents.");
+    return false;
+  }
+
+  return command(this, commandName).isSupported();
+}
+
+String Document::queryCommandValue(const String& commandName,
+                                   ExceptionState& exceptionState) {
+  if (!isHTMLDocument() && !isXHTMLDocument()) {
+    exceptionState.throwDOMException(
+        InvalidStateError,
+        "queryCommandValue is only supported on HTML documents.");
+    return "";
+  }
+
+  return command(this, commandName).value();
+}
+
+}  // namespace blink