Implement input type=color UI

chrome/browser/ui/gtk/color_chooser_gtk.cc

Index: chrome/browser/ui/gtk/color_chooser_gtk.cc
diff --git a/chrome/browser/ui/gtk/color_chooser_gtk.cc b/chrome/browser/ui/gtk/color_chooser_gtk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2b02d5d06c8bf3d4475918c54d039b3a7bf1dc91
--- /dev/null
+++ b/chrome/browser/ui/gtk/color_chooser_gtk.cc
@@ -0,0 +1,123 @@
+// Copyright (c) 2012 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 <gtk/gtk.h>
+
+#include "chrome/browser/ui/color_chooser.h"
+
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "grit/generated_resources.h"
+#include "ui/base/gtk/gtk_signal.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/skia_utils_gtk.h"
+
+class ColorChooserGtk : public ColorChooser,
+                        public content::WebContentsObserver {
+ public:
+  ColorChooserGtk(
+      int identifier, content::WebContents* tab, SkColor initial_color);
+  virtual ~ColorChooserGtk();
+
+  virtual void End() OVERRIDE;
+  virtual void SetSelectedColor(SkColor color) OVERRIDE;
+
+  virtual int GetIdentifier() const OVERRIDE { return identifier_; }
+
+ private:
+  virtual void WebContentsDestroyed(content::WebContents* tab) OVERRIDE;
+
+  // Returns the color selection for the color_selection_dialog_.
+  GtkColorSelection* ColorSelection();
+
+  CHROMEGTK_CALLBACK_0(ColorChooserGtk, void, OnColorChooserOk);
+  CHROMEGTK_CALLBACK_0(ColorChooserGtk, void, OnColorChooserCancel);
+  CHROMEGTK_CALLBACK_0(ColorChooserGtk, void, OnColorChooserDestroy);
+
+  // Identifier to assure the messages are recieved by the corresponding
+  // RendererWebColorChooserImpl.
+  int identifier_;
+  GtkWidget* color_selection_dialog_;
+};
+
+ColorChooser* ColorChooser::Create(
+    int identifier, content::WebContents* tab, SkColor initial_color) {
+  return new ColorChooserGtk(identifier, tab, initial_color);
+}
+
+ColorChooserGtk::ColorChooserGtk(
+    int identifier, content::WebContents* tab, SkColor initial_color)
+    : content::WebContentsObserver(tab),
+      identifier_(identifier),
+      color_selection_dialog_(NULL) {
+  if (!color_selection_dialog_) {
+    color_selection_dialog_ = gtk_color_selection_dialog_new(
+        l10n_util::GetStringUTF8(IDS_SELECT_COLOR_DIALOG_TITLE).c_str());
+    gtk_color_selection_set_has_opacity_control(ColorSelection(), FALSE);
+    g_signal_connect(G_OBJECT(
+        GTK_COLOR_SELECTION_DIALOG(color_selection_dialog_)->ok_button),
+        "clicked", G_CALLBACK(OnColorChooserOkThunk), this);
+    g_signal_connect(G_OBJECT(
+        GTK_COLOR_SELECTION_DIALOG(color_selection_dialog_)->cancel_button),
+        "clicked", G_CALLBACK(OnColorChooserCancelThunk), this);
+    g_signal_connect(G_OBJECT(color_selection_dialog_), "destroy",
+                     G_CALLBACK(OnColorChooserDestroyThunk), this);
+  }
+
+  GdkColor gdk_color = gfx::SkColorToGdkColor(initial_color);
+  gtk_color_selection_set_previous_color(ColorSelection(), &gdk_color);
+  gtk_color_selection_set_current_color(ColorSelection(), &gdk_color);
+  gtk_window_present(GTK_WINDOW(color_selection_dialog_));
+}
+
+ColorChooserGtk::~ColorChooserGtk() {
+  // Always call End() before destroying.
+  DCHECK(!color_selection_dialog_);
+}
+
+GtkColorSelection* ColorChooserGtk::ColorSelection() {
+  if (!color_selection_dialog_)
+    return NULL;
+
+  return GTK_COLOR_SELECTION(
+      GTK_COLOR_SELECTION_DIALOG(color_selection_dialog_)->colorsel);
+}
+
+void ColorChooserGtk::OnColorChooserOk(GtkWidget* widget) {
+  GdkColor color;
+  gtk_color_selection_get_current_color(ColorSelection(), &color);
+  web_contents()->DidChooseColorInColorChooser(identifier_,
+                                               gfx::GdkColorToSkColor(color));
+  gtk_widget_destroy(color_selection_dialog_);
+}
+
+void ColorChooserGtk::OnColorChooserCancel(GtkWidget* widget) {
+  gtk_widget_destroy(color_selection_dialog_);
+}
+
+void ColorChooserGtk::OnColorChooserDestroy(GtkWidget* widget) {
+  color_selection_dialog_ = NULL;
+  if (web_contents())
+    web_contents()->DidEndColorChooser(identifier_);
+}
+
+void ColorChooserGtk::End() {
+  if (!color_selection_dialog_)
+    return;
+
+  gtk_widget_destroy(color_selection_dialog_);
+}
+
+void ColorChooserGtk::SetSelectedColor(SkColor color) {
+  if (!color_selection_dialog_)
+    return;
+
+  GdkColor gdk_color = gfx::SkColorToGdkColor(color);
+  gtk_color_selection_set_previous_color(ColorSelection(), &gdk_color);
+  gtk_color_selection_set_current_color(ColorSelection(), &gdk_color);
+}
+
+void ColorChooserGtk::WebContentsDestroyed(content::WebContents* tab) {
+  End();
+}