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