Refactored the translate infobars.

chrome/browser/views/infobars/translate_infobar_base.cc

+// Copyright (c) 2010 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/views/infobars/translate_infobar_base.h"
+
+#include "app/resource_bundle.h"
+#include "app/slide_animation.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/translate/translate_infobar_delegate2.h"
+#include "chrome/browser/views/infobars/after_translate_infobar.h"
+#include "chrome/browser/views/infobars/before_translate_infobar.h"
+#include "chrome/browser/views/infobars/translate_message_infobar.h"
+#include "chrome/browser/views/infobars/infobar_button_border.h"
+#include "gfx/canvas.h"
+#include "grit/app_resources.h"
+#include "views/controls/button/menu_button.h"
+#include "views/controls/image_view.h"
+
+TranslateInfoBarBase::TranslateInfoBarBase(
+    TranslateInfoBarDelegate2* delegate)
+    : InfoBar(delegate),
+      normal_background_(InfoBarDelegate::PAGE_ACTION_TYPE),
+      error_background_(InfoBarDelegate::ERROR_TYPE) {
+  icon_ = new views::ImageView;
+  SkBitmap* image = delegate->GetIcon();
+  if (image)
+    icon_->SetImage(image);
+  AddChildView(icon_);
+
+  TranslateInfoBarDelegate2::BackgroundAnimationType animation =
+      delegate->background_animation_type();
+  if (animation != TranslateInfoBarDelegate2::NONE) {
+    background_color_animation_.reset(new SlideAnimation(this));
+    background_color_animation_->SetTweenType(Tween::LINEAR);
+    background_color_animation_->SetSlideDuration(500);
+    if (animation == TranslateInfoBarDelegate2::NORMAL_TO_ERROR) {
+      background_color_animation_->Show();
+    } else {
+      DCHECK_EQ(TranslateInfoBarDelegate2::ERROR_TO_NORMAL, animation);
+      // Hide() runs the animation in reverse.
+      background_color_animation_->Reset(1.0);
+      background_color_animation_->Hide();
+    }
+  }
+}
+
+TranslateInfoBarBase::~TranslateInfoBarBase() {
+}
+
+// Overridden from views::View:
+void TranslateInfoBarBase::Layout() {
+  // Layout the close button.
+  InfoBar::Layout();
+
+  // Layout the icon on left of bar.
+  gfx::Size icon_ps = icon_->GetPreferredSize();
+  icon_->SetBounds(InfoBar::kHorizontalPadding, InfoBar::OffsetY(this, icon_ps),
+      icon_ps.width(), icon_ps.height());
+}
+
+views::Label* TranslateInfoBarBase::CreateLabel(const string16& text) {
+  views::Label* label = new views::Label(UTF16ToWideHack(text),
+      ResourceBundle::GetSharedInstance().GetFont(ResourceBundle::MediumFont));
+  label->SetColor(SK_ColorBLACK);
+  label->SetHorizontalAlignment(views::Label::ALIGN_LEFT);
+  return label;
+}
+
+void TranslateInfoBarBase::PaintBackground(gfx::Canvas* canvas) {
+  // If we're not animating, simply paint the background for the current state.
+  if (background_color_animation_ == NULL ||
+      !background_color_animation_->is_animating()) {
+    GetBackground().Paint(canvas, this);
+    return;
+  }
+
+  FadeBackground(canvas, 1.0 - background_color_animation_->GetCurrentValue(),
+                 normal_background_);
+  FadeBackground(canvas, background_color_animation_->GetCurrentValue(),
+                 error_background_);
+}
+
+void TranslateInfoBarBase::AnimationProgressed(const Animation* animation) {
+  if (background_color_animation_.get() == animation)
+    SchedulePaint();  // That'll trigger a PaintBackgroud.
+  else
+    InfoBar::AnimationProgressed(animation);
+}
+
+views::MenuButton* TranslateInfoBarBase::CreateMenuButton(
+    const string16& text,
+    bool normal_has_border,
+    views::ViewMenuDelegate* menu_delegate) {
+  // Don't use text to instantiate MenuButton because we need to set font before
+  // setting text so that the button will resize to fit the entire text.
+  views::MenuButton* menu_button =
+      new views::MenuButton(NULL, std::wstring(), menu_delegate, true);
+  menu_button->set_border(new InfoBarButtonBorder);
+  menu_button->set_menu_marker(ResourceBundle::GetSharedInstance().
+      GetBitmapNamed(IDR_INFOBARBUTTON_MENU_DROPARROW));
+  if (normal_has_border) {
+    menu_button->SetNormalHasBorder(true);  // Normal button state has border.
+    // Disable animation during state change.
+    menu_button->SetAnimationDuration(0);
+  }
+  // Set font colors for different states.
+  menu_button->SetEnabledColor(SK_ColorBLACK);
+  menu_button->SetHighlightColor(SK_ColorBLACK);
+  menu_button->SetHoverColor(SK_ColorBLACK);
+
+  // Set font then text, then size button to fit text.
+  menu_button->SetFont(ResourceBundle::GetSharedInstance().GetFont(
+      ResourceBundle::MediumFont));
+  menu_button->SetText(UTF16ToWideHack(text));
+  menu_button->ClearMaxTextSize();
+  menu_button->SizeToPreferredSize();
+  return menu_button;
+}
+
+gfx::Point TranslateInfoBarBase::DetermineMenuPosition(
+    views::MenuButton* menu_button) {
+  gfx::Rect lb = menu_button->GetLocalBounds(true);
+  gfx::Point menu_position(lb.origin());
+  menu_position.Offset(2, lb.height() - 3);
+  if (base::i18n::IsRTL())
+    menu_position.Offset(lb.width() - 4, 0);
+
+  View::ConvertPointToScreen(menu_button, &menu_position);
+#if defined(OS_WIN)
+  int left_bound = GetSystemMetrics(SM_XVIRTUALSCREEN);
+  if (menu_position.x() < left_bound)
+    menu_position.set_x(left_bound);
+#endif
+  return menu_position;
+}
+
+TranslateInfoBarDelegate2* TranslateInfoBarBase::GetDelegate() const {
+  return static_cast<TranslateInfoBarDelegate2*>(delegate());
+}
+
+const InfoBarBackground& TranslateInfoBarBase::GetBackground() const {
+  return GetDelegate()->IsError() ? error_background_ : normal_background_;
+}
+
+void TranslateInfoBarBase::FadeBackground(gfx::Canvas* canvas,
+                                          double animation_value,
+                                          const InfoBarBackground& background) {
+  // Draw the background into an offscreen buffer with alpha value per animation
+  // value, then blend it back into the current canvas.
+  canvas->saveLayerAlpha(NULL, static_cast<int>(animation_value * 255),
+                         SkCanvas::kARGB_NoClipLayer_SaveFlag);
+  canvas->drawARGB(0, 255, 255, 255, SkXfermode::kClear_Mode);
+  background.Paint(canvas, this);
+  canvas->restore();
+}
+
+// TranslateInfoBarDelegate views specific method:
+InfoBar* TranslateInfoBarDelegate2::CreateInfoBar() {
+  TranslateInfoBarBase* infobar = NULL;
+  switch (type_) {
+    case BEFORE_TRANSLATE:
+      infobar = new BeforeTranslateInfoBar(this);
+      break;
+    case AFTER_TRANSLATE:
+      infobar = new AfterTranslateInfoBar(this);
+      break;
+    case TRANSLATING:
+    case TRANSLATION_ERROR:
+      infobar = new TranslateMessageInfoBar(this);
+      break;
+    default:
+      NOTREACHED();
+  }
+  // Set |infobar_view_| so that the model can notify the infobar when it
+  // changes.
+  infobar_view_ = infobar;
+  return infobar;
+}