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