Implement input type=color UI (common part)

chrome/browser/color_select_helper.cc

+// Copyright (c) 2011 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 "chrome/browser/color_select_helper.h"
+
+#include "chrome/browser/platform_util.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/renderer_host/render_widget_host_view.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "content/common/view_messages.h"
+
+#if defined(ENABLE_INPUT_COLOR)
+
+ColorSelectHelper::ColorSelectHelper()
+    : render_view_host_(0) {
+}
+
+ColorSelectHelper::~ColorSelectHelper() {
+#if defined(OS_WIN)
+  if (color_chooser_dialog_)
+    color_chooser_dialog_->ListenerDestroyed();
+#else
+  render_view_host_ = 0;
+  CleanupColorChooser(render_view_host_);
+#endif
+}
+
+void ColorSelectHelper::OpenColorChooser(RenderViewHost* render_view_host,
+                                         WebKit::WebColor initial_color) {
+  render_view_host_ = render_view_host;
+#if defined(OS_WIN)
+  if (color_chooser_dialog_)
+    return;
+  gfx::NativeWindow owning_window =
+      platform_util::GetTopLevel(render_view_host_->view()->GetNativeView());
+  color_chooser_dialog_ = ColorChooserDialog::Create(this);
+  color_chooser_dialog_->SelectColor(initial_color, owning_window);
+#else
+  ColorChooser::GetInstance()->open(this, initial_color);
+#endif
+}
+
+void ColorSelectHelper::CleanupColorChooser(RenderViewHost* render_view_host) {
+#if !defined(OS_WIN)
+  if (render_view_host_ != render_view_host)
+    return;
+  ColorChooser::GetInstance()->cleanup(this);
+  DidCleanup();
+#endif
+}
+
+void ColorSelectHelper::SetSelectedColorInColorChooser(
+    RenderViewHost* render_view_host, WebKit::WebColor color) {
+#if !defined(OS_WIN)
+  if (render_view_host_ != render_view_host)
+    return;
+  ColorChooser::GetInstance()->setSelectedColor(color);
+#endif
+}
+
+void ColorSelectHelper::DidChooseColor(WebKit::WebColor color) {
+  if (!render_view_host_)
+    return;
+  render_view_host_->DidChooseColorInColorChooser(color);
+#if defined(OS_WIN)
+  color_chooser_dialog_ = 0;

[yosin_UTC9, 2011/12/06 07:11:17]

Please use NULL for pointers. 
This comment applies all others too.

According to:
http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml#0_and_NULL

+#endif
+}
+
+void ColorSelectHelper::DidCleanup() {
+  if (!render_view_host_)
+    return;
+  render_view_host_->DidCleanupColorChooser();
+#if defined(OS_WIN)
+  color_chooser_dialog_ = 0;
+#endif
+}
+
+bool ColorSelectObserver::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ColorSelectObserver, message)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_OpenColorChooser, OnOpenColorChooser)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CleanupColorChooser, OnCleanupColorChooser)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_SetSelectedColorInColorChooser,
+                        OnSetSelectedColorInColorChooser)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+ColorSelectObserver::ColorSelectObserver(TabContents* tab_contents)
+    : TabContentsObserver(tab_contents) {
+}
+
+ColorSelectObserver::~ColorSelectObserver() {
+}
+
+void ColorSelectObserver::OnOpenColorChooser(
+    const ViewHostMsg_SetSelectedColorInColorChooser_Params& params) {
+  if (!color_select_helper_.get())
+    color_select_helper_.reset(new ColorSelectHelper());
+  color_select_helper_->OpenColorChooser(tab_contents()->render_view_host(),
+                                         params.color);
+}
+
+void ColorSelectObserver::OnCleanupColorChooser() {
+  if (!color_select_helper_.get())
+    color_select_helper_.reset(new ColorSelectHelper());
+  color_select_helper_->CleanupColorChooser(tab_contents()->render_view_host());
+}
+
+void ColorSelectObserver::OnSetSelectedColorInColorChooser(
+    const ViewHostMsg_SetSelectedColorInColorChooser_Params& params) {
+  if (!color_select_helper_.get())
+    color_select_helper_.reset(new ColorSelectHelper());
+  color_select_helper_->SetSelectedColorInColorChooser(
+      tab_contents()->render_view_host(), params.color);
+}
+
+#endif // defined(ENABLE_INPUT_COLOR)