src/ui/app_list/views/search_result_view.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 "ui/app_list/views/search_result_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "ui/app_list/app_list_constants.h"
  10 #include "ui/app_list/search_result.h"
  11 #include "ui/app_list/views/progress_bar_view.h"
  12 #include "ui/app_list/views/search_result_actions_view.h"
  13 #include "ui/app_list/views/search_result_list_view.h"
  14 #include "ui/gfx/canvas.h"
  15 #include "ui/gfx/font.h"
  16 #include "ui/gfx/image/image_skia_operations.h"
  17 #include "ui/gfx/render_text.h"
  18 #include "ui/views/controls/button/image_button.h"
  19 #include "ui/views/controls/image_view.h"
  20 #include "ui/views/controls/menu/menu_item_view.h"
  21 #include "ui/views/controls/menu/menu_runner.h"
  22
  23 namespace app_list {
  24
  25 namespace {
  26
  27 const int kPreferredWidth = 300;
  28 const int kPreferredHeight = 52;
  29 const int kIconDimension = 32;
  30 const int kIconPadding = 14;
  31 const int kIconViewWidth = kIconDimension + 2 * kIconPadding;
  32 const int kTextTrailPadding = kIconPadding;
  33 const int kBorderSize = 1;
  34
  35 // Extra margin at the right of the rightmost action icon.
  36 const int kActionButtonRightMargin = 8;
  37
  38 // Creates a RenderText of given |text| and |styles|. Caller takes ownership
  39 // of returned RenderText.
  40 gfx::RenderText* CreateRenderText(const base::string16& text,
  41                                   const SearchResult::Tags& tags) {
  42   gfx::RenderText* render_text = gfx::RenderText::CreateInstance();
  43   render_text->SetText(text);
  44   render_text->SetColor(kResultDefaultTextColor);
  45
  46   for (SearchResult::Tags::const_iterator it = tags.begin();
  47        it != tags.end();
  48        ++it) {
  49     // NONE means default style so do nothing.
  50     if (it->styles == SearchResult::Tag::NONE)
  51       continue;
  52
  53     if (it->styles & SearchResult::Tag::MATCH)
  54       render_text->ApplyStyle(gfx::BOLD, true, it->range);
  55     if (it->styles & SearchResult::Tag::DIM)
  56       render_text->ApplyColor(kResultDimmedTextColor, it->range);
  57     else if (it->styles & SearchResult::Tag::URL)
  58       render_text->ApplyColor(kResultURLTextColor, it->range);
  59   }
  60
  61   return render_text;
  62 }
  63
  64 }  // namespace
  65
  66 // static
  67 const char SearchResultView::kViewClassName[] = "ui/app_list/SearchResultView";
  68
  69 SearchResultView::SearchResultView(SearchResultListView* list_view,
  70                                    SearchResultViewDelegate* delegate)
  71     : views::CustomButton(this),
  72       result_(NULL),
  73       list_view_(list_view),
  74       delegate_(delegate),
  75       icon_(new views::ImageView),
  76       actions_view_(new SearchResultActionsView(this)),
  77       progress_bar_(new ProgressBarView) {
  78   icon_->set_interactive(false);
  79
  80   AddChildView(icon_);
  81   AddChildView(actions_view_);
  82   AddChildView(progress_bar_);
  83   set_context_menu_controller(this);
  84 }
  85
  86 SearchResultView::~SearchResultView() {
  87   ClearResultNoRepaint();
  88 }
  89
  90 void SearchResultView::SetResult(SearchResult* result) {
  91   ClearResultNoRepaint();
  92
  93   result_ = result;
  94   if (result_)
  95     result_->AddObserver(this);
  96
  97   OnIconChanged();
  98   OnActionsChanged();
  99   UpdateTitleText();
 100   UpdateDetailsText();
 101   OnIsInstallingChanged();
 102   SchedulePaint();
 103 }
 104
 105 void SearchResultView::ClearResultNoRepaint() {
 106   if (result_)
 107     result_->RemoveObserver(this);
 108   result_ = NULL;
 109 }
 110
 111 void SearchResultView::ClearSelectedAction() {
 112   actions_view_->SetSelectedAction(-1);
 113 }
 114
 115 void SearchResultView::UpdateTitleText() {
 116   if (!result_ || result_->title().empty()) {
 117     title_text_.reset();
 118     SetAccessibleName(base::string16());
 119   } else {
 120     title_text_.reset(CreateRenderText(result_->title(),
 121                                        result_->title_tags()));
 122     SetAccessibleName(result_->title());
 123   }
 124 }
 125
 126 void SearchResultView::UpdateDetailsText() {
 127   if (!result_ || result_->details().empty()) {
 128     details_text_.reset();
 129   } else {
 130     details_text_.reset(CreateRenderText(result_->details(),
 131                                          result_->details_tags()));
 132   }
 133 }
 134
 135 const char* SearchResultView::GetClassName() const {
 136   return kViewClassName;
 137 }
 138
 139 gfx::Size SearchResultView::GetPreferredSize() {
 140   return gfx::Size(kPreferredWidth, kPreferredHeight);
 141 }
 142
 143 void SearchResultView::Layout() {
 144   gfx::Rect rect(GetContentsBounds());
 145   if (rect.IsEmpty())
 146     return;
 147
 148   gfx::Rect icon_bounds(rect);
 149   icon_bounds.set_width(kIconViewWidth);
 150   icon_bounds.Inset(kIconPadding, (rect.height() - kIconDimension) / 2);
 151   icon_bounds.Intersect(rect);
 152   icon_->SetBoundsRect(icon_bounds);
 153
 154   const int max_actions_width =
 155       (rect.right() - kActionButtonRightMargin - icon_bounds.right()) / 2;
 156   int actions_width = std::min(max_actions_width,
 157                                actions_view_->GetPreferredSize().width());
 158
 159   gfx::Rect actions_bounds(rect);
 160   actions_bounds.set_x(rect.right() - kActionButtonRightMargin - actions_width);
 161   actions_bounds.set_width(actions_width);
 162   actions_view_->SetBoundsRect(actions_bounds);
 163
 164   const int progress_width = rect.width() / 5;
 165   const int progress_height = progress_bar_->GetPreferredSize().height();
 166   const gfx::Rect progress_bounds(
 167       rect.right() - kActionButtonRightMargin - progress_width,
 168       rect.y() + (rect.height() - progress_height) / 2,
 169       progress_width,
 170       progress_height);
 171   progress_bar_->SetBoundsRect(progress_bounds);
 172 }
 173
 174 bool SearchResultView::OnKeyPressed(const ui::KeyEvent& event) {
 175   // |result_| could be NULL when result list is changing.
 176   if (!result_)
 177     return false;
 178
 179   switch (event.key_code()) {
 180     case ui::VKEY_TAB: {
 181       int new_selected = actions_view_->selected_action()
 182           + (event.IsShiftDown() ? -1 : 1);
 183       actions_view_->SetSelectedAction(new_selected);
 184       return actions_view_->IsValidActionIndex(new_selected);
 185     }
 186     case ui::VKEY_RETURN: {
 187       int selected = actions_view_->selected_action();
 188       if (actions_view_->IsValidActionIndex(selected)) {
 189         OnSearchResultActionActivated(selected, event.flags());
 190       } else {
 191         delegate_->SearchResultActivated(this, event.flags());
 192       }
 193       return true;
 194     }
 195     default:
 196       break;
 197   }
 198
 199   return false;
 200 }
 201
 202 void SearchResultView::ChildPreferredSizeChanged(views::View* child) {
 203   Layout();
 204 }
 205
 206 void SearchResultView::OnPaint(gfx::Canvas* canvas) {
 207   gfx::Rect rect(GetContentsBounds());
 208   if (rect.IsEmpty())
 209     return;
 210
 211   gfx::Rect content_rect(rect);
 212   content_rect.set_height(rect.height() - kBorderSize);
 213
 214   const bool selected = list_view_->IsResultViewSelected(this);
 215   const bool hover = state() == STATE_HOVERED || state() == STATE_PRESSED;
 216   if (selected)
 217     canvas->FillRect(content_rect, kSelectedColor);
 218   else if (hover)
 219     canvas->FillRect(content_rect, kHighlightedColor);
 220   else
 221     canvas->FillRect(content_rect, kContentsBackgroundColor);
 222
 223   gfx::Rect border_bottom = gfx::SubtractRects(rect, content_rect);
 224   canvas->FillRect(border_bottom, kResultBorderColor);
 225
 226   gfx::Rect text_bounds(rect);
 227   text_bounds.set_x(kIconViewWidth);
 228   if (actions_view_->visible()) {
 229     text_bounds.set_width(
 230         rect.width() - kIconViewWidth - kTextTrailPadding -
 231         actions_view_->bounds().width() -
 232         (actions_view_->has_children() ? kActionButtonRightMargin : 0));
 233   } else {
 234     text_bounds.set_width(
 235         rect.width() - kIconViewWidth - kTextTrailPadding -
 236         progress_bar_->bounds().width() - kActionButtonRightMargin);
 237   }
 238   text_bounds.set_x(GetMirroredXWithWidthInView(text_bounds.x(),
 239                                                 text_bounds.width()));
 240
 241   if (title_text_ && details_text_) {
 242     gfx::Size title_size(text_bounds.width(),
 243                          title_text_->GetStringSize().height());
 244     gfx::Size details_size(text_bounds.width(),
 245                            details_text_->GetStringSize().height());
 246     int total_height = title_size.height() + + details_size.height();
 247     int y = text_bounds.y() + (text_bounds.height() - total_height) / 2;
 248
 249     title_text_->SetDisplayRect(gfx::Rect(gfx::Point(text_bounds.x(), y),
 250                                           title_size));
 251     title_text_->Draw(canvas);
 252
 253     y += title_size.height();
 254     details_text_->SetDisplayRect(gfx::Rect(gfx::Point(text_bounds.x(), y),
 255                                             details_size));
 256     details_text_->Draw(canvas);
 257   } else if (title_text_) {
 258     gfx::Size title_size(text_bounds.width(),
 259                          title_text_->GetStringSize().height());
 260     gfx::Rect centered_title_rect(text_bounds);
 261     centered_title_rect.ClampToCenteredSize(title_size);
 262     title_text_->SetDisplayRect(centered_title_rect);
 263     title_text_->Draw(canvas);
 264   }
 265 }
 266
 267 void SearchResultView::ButtonPressed(views::Button* sender,
 268                                      const ui::Event& event) {
 269   DCHECK(sender == this);
 270
 271   delegate_->SearchResultActivated(this, event.flags());
 272 }
 273
 274 void SearchResultView::OnIconChanged() {
 275   gfx::ImageSkia image(result_ ? result_->icon() : gfx::ImageSkia());
 276   // Note this might leave the view with an old icon. But it is needed to avoid
 277   // flash when a SearchResult's icon is loaded asynchronously. In this case, it
 278   // looks nicer to keep the stale icon for a little while on screen instead of
 279   // clearing it out. It should work correctly as long as the SearchResult does
 280   // not forget to SetIcon when it's ready.
 281   if (image.isNull())
 282     return;
 283
 284   // Scales down big icons but leave small ones unchanged.
 285   if (image.width() > kIconDimension || image.height() > kIconDimension) {
 286     image = gfx::ImageSkiaOperations::CreateResizedImage(
 287         image,
 288         skia::ImageOperations::RESIZE_BEST,
 289         gfx::Size(kIconDimension, kIconDimension));
 290   } else {
 291     icon_->ResetImageSize();
 292   }
 293
 294   // Set the image to an empty image before we reset the image because
 295   // since we're using the same backing store for our images, sometimes
 296   // ImageView won't detect that we have a new image set due to the pixel
 297   // buffer pointers remaining the same despite the image changing.
 298   icon_->SetImage(gfx::ImageSkia());
 299   icon_->SetImage(image);
 300 }
 301
 302 void SearchResultView::OnActionsChanged() {
 303   actions_view_->SetActions(result_ ? result_->actions()
 304                                     : SearchResult::Actions());
 305 }
 306
 307 void SearchResultView::OnIsInstallingChanged() {
 308   const bool is_installing = result_ && result_->is_installing();
 309   actions_view_->SetVisible(!is_installing);
 310   progress_bar_->SetVisible(is_installing);
 311 }
 312
 313 void SearchResultView::OnPercentDownloadedChanged() {
 314   progress_bar_->SetValue(result_ ? result_->percent_downloaded() / 100.0 : 0);
 315 }
 316
 317 void SearchResultView::OnItemInstalled() {
 318   delegate_->OnSearchResultInstalled(this);
 319 }
 320
 321 void SearchResultView::OnItemUninstalled() {
 322   delegate_->OnSearchResultUninstalled(this);
 323 }
 324
 325 void SearchResultView::OnSearchResultActionActivated(size_t index,
 326                                                      int event_flags) {
 327   // |result_| could be NULL when result list is changing.
 328   if (!result_)
 329     return;
 330
 331   DCHECK_LT(index, result_->actions().size());
 332
 333   delegate_->SearchResultActionActivated(this, index, event_flags);
 334 }
 335
 336 void SearchResultView::ShowContextMenuForView(views::View* source,
 337                                               const gfx::Point& point,
 338                                               ui::MenuSourceType source_type) {
 339   // |result_| could be NULL when result list is changing.
 340   if (!result_)
 341     return;
 342
 343   ui::MenuModel* menu_model = result_->GetContextMenuModel();
 344   if (!menu_model)
 345     return;
 346
 347   context_menu_runner_.reset(new views::MenuRunner(menu_model));
 348   if (context_menu_runner_->RunMenuAt(
 349           GetWidget(), NULL, gfx::Rect(point, gfx::Size()),
 350           views::MenuItemView::TOPLEFT, source_type,
 351           views::MenuRunner::HAS_MNEMONICS) ==
 352       views::MenuRunner::MENU_DELETED)
 353     return;
 354 }
 355
 356 }  // namespace app_list