Instant: Use only one hidden WebContents per profile.

chrome/browser/instant/instant_controller_utils.cc

+// Copyright 2013 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/instant/instant_controller_utils.h"
+
+#include "chrome/browser/platform_util.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_view.h"
+#include "third_party/icu/public/common/unicode/normalizer2.h"
+
+#if defined(TOOLKIT_VIEWS)
+#include "ui/views/widget/widget.h"
+#endif
+
+namespace {
+
+string16 Normalize(const string16& str) {
+  UErrorCode status = U_ZERO_ERROR;
+  const icu::Normalizer2* normalizer =
+      icu::Normalizer2::getInstance(NULL, "nfkc_cf", UNORM2_COMPOSE, status);
+  if (normalizer == NULL || U_FAILURE(status))
+    return str;
+  icu::UnicodeString norm_str(normalizer->normalize(
+      icu::UnicodeString(FALSE, str.c_str(), str.size()), status));
+  if (U_FAILURE(status))
+    return str;
+  return string16(norm_str.getBuffer(), norm_str.length());
+}
+
+}  // namespace
+
+// static
+gfx::NativeView InstantControllerUtils::GetViewGainingFocus(
+    gfx::NativeView view_gaining_focus) {
+#if defined(TOOLKIT_VIEWS)
+  // For TOOLKIT_VIEWS, the top level widget is always focused. If the focus
+  // change originated in views determine the child Widget from the view that is
+  // being focused.
+  views::Widget* widget = view_gaining_focus ?
+      views::Widget::GetWidgetForNativeView(view_gaining_focus) : NULL;
+  if (widget) {
+    views::FocusManager* focus_manager = widget->GetFocusManager();
+    if (focus_manager && focus_manager->is_changing_focus() &&
+        focus_manager->GetFocusedView() &&
+        focus_manager->GetFocusedView()->GetWidget())
+      return focus_manager->GetFocusedView()->GetWidget()->GetNativeView();
+  }
+#endif
+  return view_gaining_focus;
+}
+
+// static
+bool InstantControllerUtils::IsViewInContents(gfx::NativeView view,
+                                              content::WebContents* contents) {
+  content::RenderWidgetHostView* rwhv = contents->GetRenderWidgetHostView();
+  if (!view || !rwhv)
+    return false;
+
+  gfx::NativeView tab_view = contents->GetView()->GetNativeView();
+  if (view == rwhv->GetNativeView() || view == tab_view)
+    return true;
+
+  // Walk up the view hierarchy to determine if the view is a subview of the
+  // WebContents view (such as a windowed plugin or http auth dialog).
+  while (view) {
+    view = platform_util::GetParent(view);
+    if (view == tab_view)
+      return true;
+  }
+
+  return false;
+}
+
+// static
+bool InstantControllerUtils::NormalizeAndStripPrefix(string16* text,
+                                                     const string16& prefix) {
+  string16 norm_prefix = Normalize(prefix);
+  string16 norm_text = Normalize(*text);
+  if (norm_prefix.size() <= norm_text.size() &&
+      norm_text.compare(0, norm_prefix.size(), norm_prefix) == 0) {
+    *text = norm_text.erase(0, norm_prefix.size());
+    return true;
+  }
+  return false;
+}
+
+// static
+std::string InstantControllerUtils::CommitTypeToString(InstantCommitType type) {
+  switch (type) {
+    case INSTANT_COMMIT_PRESSED_ENTER: return "enter";
+    case INSTANT_COMMIT_PRESSED_ALT_ENTER: return "alt-enter";
+    case INSTANT_COMMIT_FOCUS_LOST: return "focus-lost";
+    case INSTANT_COMMIT_NAVIGATED: return "navigated";
+  }
+
+  NOTREACHED();
+  return std::string();
+}
+
+// static
+std::string InstantControllerUtils::FocusStateToString(
+    OmniboxFocusState state) {
+  switch (state) {
+    case OMNIBOX_FOCUS_NONE: return "none";
+    case OMNIBOX_FOCUS_VISIBLE: return "visible";
+    case OMNIBOX_FOCUS_INVISIBLE: return "invisible";
+  }
+
+  NOTREACHED();
+  return std::string();
+}
+
+// static
+std::string InstantControllerUtils::FocusChangeReasonToString(
+    OmniboxFocusChangeReason reason) {
+  switch (reason) {
+    case OMNIBOX_FOCUS_CHANGE_EXPLICIT: return "explicit";
+    case OMNIBOX_FOCUS_CHANGE_TAB_SWITCH: return "tab-switch";
+    case OMNIBOX_FOCUS_CHANGE_TYPING: return "typing";
+  }
+
+  NOTREACHED();
+  return std::string();
+}