src/ui/app_list/views/folder_header_view.cc

   1 // Copyright (c) 2013 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 "ui/app_list/views/folder_header_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "ui/app_list/app_list_constants.h"
  11 #include "ui/app_list/app_list_folder_item.h"
  12 #include "ui/app_list/app_list_switches.h"
  13 #include "ui/app_list/views/app_list_folder_view.h"
  14 #include "ui/base/resource/resource_bundle.h"
  15 #include "ui/gfx/canvas.h"
  16 #include "ui/resources/grit/ui_resources.h"
  17 #include "ui/strings/grit/ui_strings.h"
  18 #include "ui/views/border.h"
  19 #include "ui/views/controls/button/image_button.h"
  20 #include "ui/views/controls/textfield/textfield.h"
  21 #include "ui/views/painter.h"
  22
  23 namespace app_list {
  24
  25 namespace {
  26
  27 const int kPreferredWidth = 360;
  28 const int kPreferredHeight = 48;
  29 const int kIconDimension = 24;
  30 const int kBackButtonPadding = 14;
  31 const int kBottomSeparatorPadding = 9;  // Non-experimental app list only.
  32 const int kBottomSeparatorHeight = 1;
  33 const int kMaxFolderNameWidth = 300;
  34
  35 const SkColor kHintTextColor = SkColorSetRGB(0xA0, 0xA0, 0xA0);
  36
  37 }  // namespace
  38
  39 class FolderHeaderView::FolderNameView : public views::Textfield {
  40  public:
  41   FolderNameView() {
  42     SetBorder(views::Border::CreateEmptyBorder(1, 1, 1, 1));
  43     const SkColor kFocusBorderColor = SkColorSetRGB(64, 128, 250);
  44     SetFocusPainter(views::Painter::CreateSolidFocusPainter(
  45           kFocusBorderColor,
  46           gfx::Insets(0, 0, 1, 1)));
  47   }
  48
  49   virtual ~FolderNameView() {
  50   }
  51
  52  private:
  53   DISALLOW_COPY_AND_ASSIGN(FolderNameView);
  54 };
  55
  56 FolderHeaderView::FolderHeaderView(FolderHeaderViewDelegate* delegate)
  57     : folder_item_(NULL),
  58       back_button_(new views::ImageButton(this)),
  59       folder_name_view_(new FolderNameView),
  60       folder_name_placeholder_text_(
  61           ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
  62               IDS_APP_LIST_FOLDER_NAME_PLACEHOLDER)),
  63       delegate_(delegate),
  64       folder_name_visible_(true) {
  65   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  66   back_button_->SetImage(views::ImageButton::STATE_NORMAL,
  67       rb.GetImageSkiaNamed(IDR_APP_LIST_FOLDER_BACK_NORMAL));
  68   back_button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
  69       views::ImageButton::ALIGN_MIDDLE);
  70   AddChildView(back_button_);
  71   back_button_->SetFocusable(true);
  72   back_button_->SetAccessibleName(
  73       ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
  74           IDS_APP_LIST_FOLDER_CLOSE_FOLDER_ACCESSIBILE_NAME));
  75
  76   folder_name_view_->SetFontList(
  77       rb.GetFontList(ui::ResourceBundle::MediumFont));
  78   folder_name_view_->set_placeholder_text_color(kHintTextColor);
  79   folder_name_view_->set_placeholder_text(folder_name_placeholder_text_);
  80   folder_name_view_->SetBorder(views::Border::NullBorder());
  81   folder_name_view_->SetBackgroundColor(kContentsBackgroundColor);
  82   folder_name_view_->set_controller(this);
  83   AddChildView(folder_name_view_);
  84 }
  85
  86 FolderHeaderView::~FolderHeaderView() {
  87   if (folder_item_)
  88     folder_item_->RemoveObserver(this);
  89 }
  90
  91 void FolderHeaderView::SetFolderItem(AppListFolderItem* folder_item) {
  92   if (folder_item_)
  93     folder_item_->RemoveObserver(this);
  94
  95   folder_item_ = folder_item;
  96   if (!folder_item_)
  97     return;
  98   folder_item_->AddObserver(this);
  99
 100   folder_name_view_->SetEnabled(folder_item_->folder_type() !=
 101                                 AppListFolderItem::FOLDER_TYPE_OEM);
 102
 103   Update();
 104 }
 105
 106 void FolderHeaderView::UpdateFolderNameVisibility(bool visible) {
 107   folder_name_visible_ = visible;
 108   Update();
 109   SchedulePaint();
 110 }
 111
 112 void FolderHeaderView::OnFolderItemRemoved() {
 113   folder_item_ = NULL;
 114 }
 115
 116 void FolderHeaderView::Update() {
 117   if (!folder_item_)
 118     return;
 119
 120   folder_name_view_->SetVisible(folder_name_visible_);
 121   if (folder_name_visible_) {
 122     folder_name_view_->SetText(base::UTF8ToUTF16(folder_item_->name()));
 123     UpdateFolderNameAccessibleName();
 124   }
 125
 126   Layout();
 127 }
 128
 129 void FolderHeaderView::UpdateFolderNameAccessibleName() {
 130   // Sets |folder_name_view_|'s accessible name to the placeholder text if
 131   // |folder_name_view_| is blank; otherwise, clear the accessible name, the
 132   // accessible state's value is set to be folder_name_view_->text() by
 133   // TextField.
 134   base::string16 accessible_name = folder_name_view_->text().empty()
 135                                        ? folder_name_placeholder_text_
 136                                        : base::string16();
 137   folder_name_view_->SetAccessibleName(accessible_name);
 138 }
 139
 140 const base::string16& FolderHeaderView::GetFolderNameForTest() {
 141   return folder_name_view_->text();
 142 }
 143
 144 void FolderHeaderView::SetFolderNameForTest(const base::string16& name) {
 145   folder_name_view_->SetText(name);
 146 }
 147
 148 bool FolderHeaderView::IsFolderNameEnabledForTest() const {
 149   return folder_name_view_->enabled();
 150 }
 151
 152 gfx::Size FolderHeaderView::GetPreferredSize() const {
 153   return gfx::Size(kPreferredWidth, kPreferredHeight);
 154 }
 155
 156 void FolderHeaderView::Layout() {
 157   gfx::Rect rect(GetContentsBounds());
 158   if (rect.IsEmpty())
 159     return;
 160
 161   gfx::Rect back_bounds(rect);
 162   back_bounds.set_width(kIconDimension + 2 * kBackButtonPadding);
 163   if (app_list::switches::IsExperimentalAppListEnabled()) {
 164     // Align the left edge of the button image with the left margin of the
 165     // launcher window. Note that this means the physical button dimensions
 166     // extends slightly into the margin.
 167     back_bounds.set_x(kExperimentalWindowPadding - kBackButtonPadding);
 168   }
 169   back_button_->SetBoundsRect(back_bounds);
 170
 171   gfx::Rect text_bounds(rect);
 172   base::string16 text = folder_item_ && !folder_item_->name().empty()
 173                             ? base::UTF8ToUTF16(folder_item_->name())
 174                             : folder_name_placeholder_text_;
 175   int text_width =
 176       gfx::Canvas::GetStringWidth(text, folder_name_view_->GetFontList()) +
 177       folder_name_view_->GetCaretBounds().width() +
 178       folder_name_view_->GetInsets().width();
 179   text_width = std::min(text_width, kMaxFolderNameWidth);
 180   text_bounds.set_x(back_bounds.x() + (rect.width() - text_width) / 2);
 181   text_bounds.set_width(text_width);
 182   text_bounds.ClampToCenteredSize(gfx::Size(text_bounds.width(),
 183       folder_name_view_->GetPreferredSize().height()));
 184   folder_name_view_->SetBoundsRect(text_bounds);
 185 }
 186
 187 bool FolderHeaderView::OnKeyPressed(const ui::KeyEvent& event) {
 188   if (event.key_code() == ui::VKEY_RETURN)
 189     delegate_->GiveBackFocusToSearchBox();
 190
 191   return false;
 192 }
 193
 194 void FolderHeaderView::OnPaint(gfx::Canvas* canvas) {
 195   views::View::OnPaint(canvas);
 196
 197   gfx::Rect rect(GetContentsBounds());
 198   if (rect.IsEmpty() || !folder_name_visible_)
 199     return;
 200
 201   // Draw bottom separator line.
 202   int horizontal_padding = app_list::switches::IsExperimentalAppListEnabled()
 203                                ? kExperimentalWindowPadding
 204                                : kBottomSeparatorPadding;
 205   rect.Inset(horizontal_padding, 0);
 206   rect.set_y(rect.bottom() - kBottomSeparatorHeight);
 207   rect.set_height(kBottomSeparatorHeight);
 208   canvas->FillRect(rect, kTopSeparatorColor);
 209 }
 210
 211 void FolderHeaderView::ContentsChanged(views::Textfield* sender,
 212                                        const base::string16& new_contents) {
 213   // Temporarily remove from observer to ignore data change caused by us.
 214   if (!folder_item_)
 215     return;
 216
 217   folder_item_->RemoveObserver(this);
 218   // Enforce the maximum folder name length in UI.
 219   std::string name = base::UTF16ToUTF8(
 220       folder_name_view_->text().substr(0, kMaxFolderNameChars));
 221   if (name != folder_item_->name())
 222     delegate_->SetItemName(folder_item_, name);
 223   folder_item_->AddObserver(this);
 224
 225   UpdateFolderNameAccessibleName();
 226
 227   Layout();
 228 }
 229
 230 void FolderHeaderView::ButtonPressed(views::Button* sender,
 231                                      const ui::Event& event) {
 232   delegate_->NavigateBack(folder_item_, event);
 233 }
 234
 235 void FolderHeaderView::ItemNameChanged() {
 236   Update();
 237 }
 238
 239 }  // namespace app_list