Introduce InsertCommands to split EditorCommand.cpp

This CL introduces "InsertCommands.h", move the declarations of some
static functions related to insert commands to the header file. Make
EditorCommand simpler for improving code health.

Bug: 818552
Signed-off-by: Zhuoyu Qian <zhuoyu.qian@samsung.com>
Change-Id: I4fc744dc58da885071760ba691baa03e8015d63c
Reviewed-on: https://chromium-review.googlesource.com/977365Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545746}

third_party/WebKit/Source/core/editing/BUILD.gn

@@ -129,6 +129,7 @@ blink_core_sources("editing") {
     "commands/FormatBlockCommand.h",
     "commands/IndentOutdentCommand.cpp",
     "commands/IndentOutdentCommand.h",
+    "commands/InsertCommands.h",
     "commands/InsertIncrementalTextCommand.cpp",
     "commands/InsertIncrementalTextCommand.h",
     "commands/InsertIntoTextNodeCommand.cpp",

third_party/WebKit/Source/core/editing/commands/InsertCommands.h

+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2009 Igalia S.L.
+ *
+ * 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.
+ */
+
+// Copyright 2018 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.
+
+#ifndef InsertCommands_h
+#define InsertCommands_h
+
+#include "platform/wtf/Allocator.h"
+#include "platform/wtf/Forward.h"
+
+namespace blink {
+
+class DocumentFragment;
+class Event;
+class HTMLElement;
+class LocalFrame;
+
+enum class EditorCommandSource;
+
+// This class provides static functions about commands related to insert.
+class InsertCommands {
+  STATIC_ONLY(InsertCommands);
+
+ public:
+  // Returns |bool| value for Document#execCommand().
+  static bool ExecuteInsertBacktab(LocalFrame&,
+                                   Event*,
+                                   EditorCommandSource,
+                                   const String&);
+  static bool ExecuteInsertHorizontalRule(LocalFrame&,
+                                          Event*,
+                                          EditorCommandSource,
+                                          const String&);
+  static bool ExecuteInsertHTML(LocalFrame&,
+                                Event*,
+                                EditorCommandSource,
+                                const String&);
+  static bool ExecuteInsertImage(LocalFrame&,
+                                 Event*,
+                                 EditorCommandSource,
+                                 const String&);
+  static bool ExecuteInsertLineBreak(LocalFrame&,
+                                     Event*,
+                                     EditorCommandSource,
+                                     const String&);
+  static bool ExecuteInsertNewline(LocalFrame&,
+                                   Event*,
+                                   EditorCommandSource,
+                                   const String&);
+  static bool ExecuteInsertNewlineInQuotedContent(LocalFrame&,
+                                                  Event*,
+                                                  EditorCommandSource,
+                                                  const String&);
+  static bool ExecuteInsertOrderedList(LocalFrame&,
+                                       Event*,
+                                       EditorCommandSource,
+                                       const String&);
+  static bool ExecuteInsertParagraph(LocalFrame&,
+                                     Event*,
+                                     EditorCommandSource,
+                                     const String&);
+  static bool ExecuteInsertTab(LocalFrame&,
+                               Event*,
+                               EditorCommandSource,
+                               const String&);
+  static bool ExecuteInsertText(LocalFrame&,
+                                Event*,
+                                EditorCommandSource,
+                                const String&);
+  static bool ExecuteInsertUnorderedList(LocalFrame&,
+                                         Event*,
+                                         EditorCommandSource,
+                                         const String&);
+
+ private:
+  static bool ExecuteInsertFragment(LocalFrame&, DocumentFragment*);
+  static bool ExecuteInsertElement(LocalFrame&, HTMLElement*);
+
+  // Related to Editor::selectionForCommand.
+  // Certain operations continue to use the target control's selection even if
+  // the event handler already moved the selection outside of the text control.
+  static LocalFrame* TargetFrame(LocalFrame&, Event*);
+};
+
+}  // namespace blink
+
+#endif