src/chrome/browser/ui/views/infobars/translate_infobar_base.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/views/infobars/translate_infobar_base.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "chrome/browser/translate/translate_infobar_delegate.h"
   9 #include "chrome/browser/translate/translate_tab_helper.h"
  10 #include "chrome/browser/ui/views/infobars/after_translate_infobar.h"
  11 #include "chrome/browser/ui/views/infobars/before_translate_infobar.h"
  12 #include "chrome/browser/ui/views/infobars/translate_message_infobar.h"
  13 #include "components/infobars/core/infobar.h"
  14 #include "grit/theme_resources.h"
  15 #include "ui/base/resource/resource_bundle.h"
  16 #include "ui/gfx/animation/slide_animation.h"
  17 #include "ui/gfx/canvas.h"
  18 #include "ui/views/controls/button/menu_button.h"
  19 #include "ui/views/controls/label.h"
  20
  21
  22 // TranslateInfoBarDelegate ---------------------------------------------------
  23
  24 // static
  25 scoped_ptr<infobars::InfoBar> TranslateInfoBarDelegate::CreateInfoBar(
  26     scoped_ptr<TranslateInfoBarDelegate> delegate) {
  27   if (delegate->translate_step() ==
  28       translate::TRANSLATE_STEP_BEFORE_TRANSLATE) {
  29     return scoped_ptr<infobars::InfoBar>(
  30         new BeforeTranslateInfoBar(delegate.Pass()));
  31   }
  32   if (delegate->translate_step() ==
  33       translate::TRANSLATE_STEP_AFTER_TRANSLATE) {
  34     return scoped_ptr<infobars::InfoBar>(
  35         new AfterTranslateInfoBar(delegate.Pass()));
  36   }
  37   return scoped_ptr<infobars::InfoBar>(
  38       new TranslateMessageInfoBar(delegate.Pass()));
  39 }
  40
  41
  42 // TranslateInfoBarBase -------------------------------------------------------
  43
  44 // static
  45 const int TranslateInfoBarBase::kButtonInLabelSpacing = 5;
  46
  47 void TranslateInfoBarBase::UpdateLanguageButtonText(
  48     views::MenuButton* button,
  49     const base::string16& text) {
  50   DCHECK(button);
  51   button->SetText(text);
  52   button->ClearMaxTextSize();
  53   button->SizeToPreferredSize();
  54   Layout();
  55   SchedulePaint();
  56 }
  57
  58 TranslateInfoBarBase::TranslateInfoBarBase(
  59     scoped_ptr<TranslateInfoBarDelegate> delegate)
  60     : InfoBarView(delegate.PassAs<infobars::InfoBarDelegate>()),
  61       error_background_(infobars::InfoBarDelegate::WARNING_TYPE) {
  62 }
  63
  64 TranslateInfoBarBase::~TranslateInfoBarBase() {
  65 }
  66
  67 void TranslateInfoBarBase::ViewHierarchyChanged(
  68     const ViewHierarchyChangedDetails& details) {
  69   if (details.is_add && (details.child == this) &&
  70       (background_color_animation_ == NULL)) {
  71     background_color_animation_.reset(new gfx::SlideAnimation(this));
  72     background_color_animation_->SetTweenType(gfx::Tween::LINEAR);
  73     background_color_animation_->SetSlideDuration(500);
  74     TranslateInfoBarDelegate::BackgroundAnimationType animation =
  75         GetDelegate()->background_animation_type();
  76     if (animation == TranslateInfoBarDelegate::NORMAL_TO_ERROR) {
  77       background_color_animation_->Show();
  78     } else if (animation == TranslateInfoBarDelegate::ERROR_TO_NORMAL) {
  79       // Hide() runs the animation in reverse.
  80       background_color_animation_->Reset(1.0);
  81       background_color_animation_->Hide();
  82     }
  83   }
  84
  85   // This must happen after adding all other children so InfoBarView can ensure
  86   // the close button is the last child.
  87   InfoBarView::ViewHierarchyChanged(details);
  88 }
  89
  90 TranslateInfoBarDelegate* TranslateInfoBarBase::GetDelegate() {
  91   return delegate()->AsTranslateInfoBarDelegate();
  92 }
  93
  94 void TranslateInfoBarBase::OnPaintBackground(gfx::Canvas* canvas) {
  95   // We need to set the separator color for |error_background_| like
  96   // InfoBarView::Layout() does for the normal background.
  97   const infobars::InfoBarContainer::Delegate* delegate = container_delegate();
  98   if (delegate)
  99     error_background_.set_separator_color(delegate->GetInfoBarSeparatorColor());
 100
 101   // If we're not animating, simply paint the background for the current state.
 102   if (!background_color_animation_->is_animating()) {
 103     GetBackground().Paint(canvas, this);
 104     return;
 105   }
 106
 107   FadeBackground(canvas, 1.0 - background_color_animation_->GetCurrentValue(),
 108                  *background());
 109   FadeBackground(canvas, background_color_animation_->GetCurrentValue(),
 110                  error_background_);
 111 }
 112
 113 void TranslateInfoBarBase::AnimationProgressed(
 114     const gfx::Animation* animation) {
 115   if (animation == background_color_animation_.get())
 116     SchedulePaint();  // That'll trigger a PaintBackgroud.
 117   else
 118     InfoBarView::AnimationProgressed(animation);
 119 }
 120
 121 const views::Background& TranslateInfoBarBase::GetBackground() {
 122   return GetDelegate()->is_error() ? error_background_ : *background();
 123 }
 124
 125 void TranslateInfoBarBase::FadeBackground(gfx::Canvas* canvas,
 126                                           double animation_value,
 127                                           const views::Background& background) {
 128   // Draw the background into an offscreen buffer with alpha value per animation
 129   // value, then blend it back into the current canvas.
 130   canvas->SaveLayerAlpha(static_cast<int>(animation_value * 255));
 131   background.Paint(canvas, this);
 132   canvas->Restore();
 133 }