Use the default theme as the fallback UI in Blink

Most native themes don't support zooming or styling required by Blink.
This introduces a FallbackTheme that can be used in these situations.

Blink side change: https://codereview.chromium.org/14108007/

BUG=84973

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=200431

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=200785

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=201085

Review URL: https://chromiumcodereview.appspot.com/14424007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@201390 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 242 insertions, 2 deletions

diff --git a/webkit/glue/webfallbackthemeengine_impl.cc b/webkit/glue/webfallbackthemeengine_impl.cc
new file mode 100644
index 0000000..213e3a7
--- /dev/null
+++ b/webkit/glue/webfallbackthemeengine_impl.cc
@@ -0,0 +1,191 @@
+// 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 "webkit/glue/webfallbackthemeengine_impl.h"
+
+#include "skia/ext/platform_canvas.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebRect.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
+#include "ui/native_theme/fallback_theme.h"
+
+using WebKit::WebCanvas;
+using WebKit::WebColor;
+using WebKit::WebRect;
+using WebKit::WebFallbackThemeEngine;
+
+namespace webkit_glue {
+
+static ui::NativeTheme::Part NativeThemePart(
+    WebFallbackThemeEngine::Part part) {
+  switch (part) {
+    case WebFallbackThemeEngine::PartScrollbarDownArrow:
+      return ui::NativeTheme::kScrollbarDownArrow;
+    case WebFallbackThemeEngine::PartScrollbarLeftArrow:
+      return ui::NativeTheme::kScrollbarLeftArrow;
+    case WebFallbackThemeEngine::PartScrollbarRightArrow:
+      return ui::NativeTheme::kScrollbarRightArrow;
+    case WebFallbackThemeEngine::PartScrollbarUpArrow:
+      return ui::NativeTheme::kScrollbarUpArrow;
+    case WebFallbackThemeEngine::PartScrollbarHorizontalThumb:
+      return ui::NativeTheme::kScrollbarHorizontalThumb;
+    case WebFallbackThemeEngine::PartScrollbarVerticalThumb:
+      return ui::NativeTheme::kScrollbarVerticalThumb;
+    case WebFallbackThemeEngine::PartScrollbarHorizontalTrack:
+      return ui::NativeTheme::kScrollbarHorizontalTrack;
+    case WebFallbackThemeEngine::PartScrollbarVerticalTrack:
+      return ui::NativeTheme::kScrollbarVerticalTrack;
+    case WebFallbackThemeEngine::PartCheckbox:
+      return ui::NativeTheme::kCheckbox;
+    case WebFallbackThemeEngine::PartRadio:
+      return ui::NativeTheme::kRadio;
+    case WebFallbackThemeEngine::PartButton:
+      return ui::NativeTheme::kPushButton;
+    case WebFallbackThemeEngine::PartTextField:
+      return ui::NativeTheme::kTextField;
+    case WebFallbackThemeEngine::PartMenuList:
+      return ui::NativeTheme::kMenuList;
+    case WebFallbackThemeEngine::PartSliderTrack:
+      return ui::NativeTheme::kSliderTrack;
+    case WebFallbackThemeEngine::PartSliderThumb:
+      return ui::NativeTheme::kSliderThumb;
+    case WebFallbackThemeEngine::PartInnerSpinButton:
+      return ui::NativeTheme::kInnerSpinButton;
+    case WebFallbackThemeEngine::PartProgressBar:
+      return ui::NativeTheme::kProgressBar;
+    default:
+      return ui::NativeTheme::kScrollbarDownArrow;
+  }
+}
+
+static ui::NativeTheme::State NativeThemeState(
+    WebFallbackThemeEngine::State state) {
+  switch (state) {
+    case WebFallbackThemeEngine::StateDisabled:
+      return ui::NativeTheme::kDisabled;
+    case WebFallbackThemeEngine::StateHover:
+      return ui::NativeTheme::kHovered;
+    case WebFallbackThemeEngine::StateNormal:
+      return ui::NativeTheme::kNormal;
+    case WebFallbackThemeEngine::StatePressed:
+      return ui::NativeTheme::kPressed;
+    default:
+      return ui::NativeTheme::kDisabled;
+  }
+}
+
+static void GetNativeThemeExtraParams(
+    WebFallbackThemeEngine::Part part,
+    WebFallbackThemeEngine::State state,
+    const WebFallbackThemeEngine::ExtraParams* extra_params,
+    ui::NativeTheme::ExtraParams* native_theme_extra_params) {
+  switch (part) {
+    case WebFallbackThemeEngine::PartScrollbarHorizontalTrack:
+    case WebFallbackThemeEngine::PartScrollbarVerticalTrack:
+      native_theme_extra_params->scrollbar_track.track_x =
+          extra_params->scrollbarTrack.trackX;
+      native_theme_extra_params->scrollbar_track.track_y =
+          extra_params->scrollbarTrack.trackY;
+      native_theme_extra_params->scrollbar_track.track_width =
+          extra_params->scrollbarTrack.trackWidth;
+      native_theme_extra_params->scrollbar_track.track_height =
+          extra_params->scrollbarTrack.trackHeight;
+      break;
+    case WebFallbackThemeEngine::PartCheckbox:
+      native_theme_extra_params->button.checked = extra_params->button.checked;
+      native_theme_extra_params->button.indeterminate =
+          extra_params->button.indeterminate;
+      break;
+    case WebFallbackThemeEngine::PartRadio:
+      native_theme_extra_params->button.checked = extra_params->button.checked;
+      break;
+    case WebFallbackThemeEngine::PartButton:
+      native_theme_extra_params->button.is_default =
+          extra_params->button.isDefault;
+      native_theme_extra_params->button.has_border =
+          extra_params->button.hasBorder;
+      // Native buttons have a different focus style.
+      native_theme_extra_params->button.is_focused = false;
+      native_theme_extra_params->button.background_color =
+          extra_params->button.backgroundColor;
+      break;
+    case WebFallbackThemeEngine::PartTextField:
+      native_theme_extra_params->text_field.is_text_area =
+          extra_params->textField.isTextArea;
+      native_theme_extra_params->text_field.is_listbox =
+          extra_params->textField.isListbox;
+      native_theme_extra_params->text_field.background_color =
+          extra_params->textField.backgroundColor;
+      break;
+    case WebFallbackThemeEngine::PartMenuList:
+      native_theme_extra_params->menu_list.has_border =
+          extra_params->menuList.hasBorder;
+      native_theme_extra_params->menu_list.has_border_radius =
+          extra_params->menuList.hasBorderRadius;
+      native_theme_extra_params->menu_list.arrow_x =
+          extra_params->menuList.arrowX;
+      native_theme_extra_params->menu_list.arrow_y =
+          extra_params->menuList.arrowY;
+      native_theme_extra_params->menu_list.background_color =
+          extra_params->menuList.backgroundColor;
+      break;
+    case WebFallbackThemeEngine::PartSliderTrack:
+    case WebFallbackThemeEngine::PartSliderThumb:
+      native_theme_extra_params->slider.vertical =
+          extra_params->slider.vertical;
+      native_theme_extra_params->slider.in_drag = extra_params->slider.inDrag;
+      break;
+    case WebFallbackThemeEngine::PartInnerSpinButton:
+      native_theme_extra_params->inner_spin.spin_up =
+          extra_params->innerSpin.spinUp;
+      native_theme_extra_params->inner_spin.read_only =
+          extra_params->innerSpin.readOnly;
+      break;
+    case WebFallbackThemeEngine::PartProgressBar:
+      native_theme_extra_params->progress_bar.determinate =
+          extra_params->progressBar.determinate;
+      native_theme_extra_params->progress_bar.value_rect_x =
+          extra_params->progressBar.valueRectX;
+      native_theme_extra_params->progress_bar.value_rect_y =
+          extra_params->progressBar.valueRectY;
+      native_theme_extra_params->progress_bar.value_rect_width =
+          extra_params->progressBar.valueRectWidth;
+      native_theme_extra_params->progress_bar.value_rect_height =
+          extra_params->progressBar.valueRectHeight;
+      break;
+    default:
+      break;  // Parts that have no extra params get here.
+  }
+}
+
+WebFallbackThemeEngineImpl::WebFallbackThemeEngineImpl()
+    : theme_(new ui::FallbackTheme()) {
+}
+
+WebFallbackThemeEngineImpl::~WebFallbackThemeEngineImpl() {}
+
+WebKit::WebSize WebFallbackThemeEngineImpl::getSize(
+    WebFallbackThemeEngine::Part part) {
+  ui::NativeTheme::ExtraParams extra;
+  return theme_->GetPartSize(NativeThemePart(part),
+                             ui::NativeTheme::kNormal,
+                             extra);
+}
+
+void WebFallbackThemeEngineImpl::paint(
+    WebKit::WebCanvas* canvas,
+    WebFallbackThemeEngine::Part part,
+    WebFallbackThemeEngine::State state,
+    const WebKit::WebRect& rect,
+    const WebFallbackThemeEngine::ExtraParams* extra_params) {
+  ui::NativeTheme::ExtraParams native_theme_extra_params;
+  GetNativeThemeExtraParams(
+      part, state, extra_params, &native_theme_extra_params);
+  theme_->Paint(canvas,
+                NativeThemePart(part),
+                NativeThemeState(state),
+                gfx::Rect(rect),
+                native_theme_extra_params);
+}
+
+}  // namespace webkit_glue
diff --git a/webkit/glue/webfallbackthemeengine_impl.h b/webkit/glue/webfallbackthemeengine_impl.h
new file mode 100644
index 0000000..0887774
--- /dev/null
+++ b/webkit/glue/webfallbackthemeengine_impl.h
@@ -0,0 +1,39 @@
+// 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.
+
+#ifndef WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_
+#define WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebFallbackThemeEngine.h"
+
+namespace ui {
+class FallbackTheme;
+}
+
+namespace webkit_glue {
+
+class WebFallbackThemeEngineImpl : public WebKit::WebFallbackThemeEngine {
+ public:
+  WebFallbackThemeEngineImpl();
+  virtual ~WebFallbackThemeEngineImpl();
+
+  // WebFallbackThemeEngine methods:
+  virtual WebKit::WebSize getSize(WebKit::WebFallbackThemeEngine::Part);
+  virtual void paint(
+      WebKit::WebCanvas* canvas,
+      WebKit::WebFallbackThemeEngine::Part part,
+      WebKit::WebFallbackThemeEngine::State state,
+      const WebKit::WebRect& rect,
+      const WebKit::WebFallbackThemeEngine::ExtraParams* extra_params);
+
+ private:
+  scoped_ptr<ui::FallbackTheme> theme_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebFallbackThemeEngineImpl);
+};
+
+}  // namespace webkit_glue
+
+#endif  // WEBKIT_GLUE_WEBFALLBACKTHEMEENGINE_IMPL_H_
diff --git a/webkit/glue/webkit_glue.gypi b/webkit/glue/webkit_glue.gypi
index 8311e2c..b05bf75 100644
--- a/webkit/glue/webkit_glue.gypi
+++ b/webkit/glue/webkit_glue.gypi
@@ -228,6 +228,8 @@
         'webdropdata.cc',
         'webdropdata_win.cc',
         'webdropdata.h',
+        'webfallbackthemeengine_impl.cc',
+        'webfallbackthemeengine_impl.h',
         'webfileutilities_impl.cc',
         'webfileutilities_impl.h',
         'webkit_glue.cc',
diff --git a/webkit/glue/webkitplatformsupport_impl.cc b/webkit/glue/webkitplatformsupport_impl.cc
index 00900a7..af0ec80 100644
--- a/webkit/glue/webkitplatformsupport_impl.cc
+++ b/webkit/glue/webkitplatformsupport_impl.cc
@@ -62,6 +62,7 @@
 using WebKit::WebAudioBus;
 using WebKit::WebCookie;
 using WebKit::WebData;
+using WebKit::WebFallbackThemeEngine;
 using WebKit::WebLocalizedString;
 using WebKit::WebPluginListBuilder;
 using WebKit::WebString;
@@ -383,7 +384,11 @@ void WebKitPlatformSupportImpl::SetFlingCurveParameters(
 }
 
 WebThemeEngine* WebKitPlatformSupportImpl::themeEngine() {
-  return &theme_engine_;
+  return &native_theme_engine_;
+}
+
+WebFallbackThemeEngine* WebKitPlatformSupportImpl::fallbackThemeEngine() {
+  return &fallback_theme_engine_;
 }
 
 WebURLLoader* WebKitPlatformSupportImpl::createURLLoader() {
diff --git a/webkit/glue/webkitplatformsupport_impl.h b/webkit/glue/webkitplatformsupport_impl.h
index 145f631..e8c2b28 100644
--- a/webkit/glue/webkitplatformsupport_impl.h
+++ b/webkit/glue/webkitplatformsupport_impl.h
@@ -14,6 +14,7 @@
 #include "third_party/WebKit/Source/Platform/chromium/public/WebURLError.h"
 #include "ui/base/layout.h"
 #include "webkit/glue/resource_loader_bridge.h"
+#include "webkit/glue/webfallbackthemeengine_impl.h"
 #include "webkit/glue/webkit_glue_export.h"
 
 #if defined(USE_DEFAULT_RENDER_THEME)
@@ -57,6 +58,7 @@ class WEBKIT_GLUE_EXPORT WebKitPlatformSupportImpl :
 
   // Platform methods (partial implementation):
   virtual WebKit::WebThemeEngine* themeEngine();
+  virtual WebKit::WebFallbackThemeEngine* fallbackThemeEngine();
 
   virtual base::PlatformFile databaseOpenFile(
       const WebKit::WebString& vfs_file_name, int desired_flags);
@@ -186,7 +188,8 @@ class WEBKIT_GLUE_EXPORT WebKitPlatformSupportImpl :
   double shared_timer_fire_time_;
   bool shared_timer_fire_time_was_set_while_suspended_;
   int shared_timer_suspended_;  // counter
-  WebThemeEngineImpl theme_engine_;
+  WebThemeEngineImpl native_theme_engine_;
+  WebFallbackThemeEngineImpl fallback_theme_engine_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   scoped_ptr<FlingCurveConfiguration> fling_curve_configuration_;
 };