chrome/browser/ui/gtk/status_bubble_gtk.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/gtk/status_bubble_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8
   9 #include <algorithm>
  10
  11 #include "base/i18n/rtl.h"
  12 #include "base/message_loop/message_loop.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "chrome/browser/chrome_notification_types.h"
  15 #include "chrome/browser/themes/theme_properties.h"
  16 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
  17 #include "chrome/browser/ui/gtk/gtk_util.h"
  18 #include "chrome/browser/ui/gtk/rounded_window.h"
  19 #include "content/public/browser/notification_source.h"
  20 #include "ui/base/gtk/gtk_hig_constants.h"
  21 #include "ui/gfx/animation/slide_animation.h"
  22 #include "ui/gfx/font_list.h"
  23 #include "ui/gfx/gtk_compat.h"
  24 #include "ui/gfx/text_elider.h"
  25
  26 namespace {
  27
  28 // Inner padding between the border and the text label.
  29 const int kInternalTopBottomPadding = 1;
  30 const int kInternalLeftRightPadding = 2;
  31
  32 // The radius of the edges of our bubble.
  33 const int kCornerSize = 3;
  34
  35 // Milliseconds before we hide the status bubble widget when you mouseout.
  36 const int kHideDelay = 250;
  37
  38 // How close the mouse can get to the infobubble before it starts sliding
  39 // off-screen.
  40 const int kMousePadding = 20;
  41
  42 }  // namespace
  43
  44 StatusBubbleGtk::StatusBubbleGtk(Profile* profile)
  45     : theme_service_(GtkThemeService::GetFrom(profile)),
  46       padding_(NULL),
  47       start_width_(0),
  48       desired_width_(0),
  49       flip_horizontally_(false),
  50       y_offset_(0),
  51       download_shelf_is_visible_(false),
  52       last_mouse_left_content_(false),
  53       ignore_next_left_content_(false) {
  54   InitWidgets();
  55
  56   theme_service_->InitThemesFor(this);
  57   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
  58                  content::Source<ThemeService>(theme_service_));
  59 }
  60
  61 StatusBubbleGtk::~StatusBubbleGtk() {
  62   label_.Destroy();
  63   container_.Destroy();
  64 }
  65
  66 void StatusBubbleGtk::SetStatus(const base::string16& status_text_wide) {
  67   std::string status_text = base::UTF16ToUTF8(status_text_wide);
  68   if (status_text_ == status_text)
  69     return;
  70
  71   status_text_ = status_text;
  72   if (!status_text_.empty())
  73     SetStatusTextTo(status_text_);
  74   else if (!url_text_.empty())
  75     SetStatusTextTo(url_text_);
  76   else
  77     SetStatusTextTo(std::string());
  78 }
  79
  80 void StatusBubbleGtk::SetURL(const GURL& url, const std::string& languages) {
  81   url_ = url;
  82   languages_ = languages;
  83
  84   // If we want to clear a displayed URL but there is a status still to
  85   // display, display that status instead.
  86   if (url.is_empty() && !status_text_.empty()) {
  87     url_text_ = std::string();
  88     SetStatusTextTo(status_text_);
  89     return;
  90   }
  91
  92   SetStatusTextToURL();
  93 }
  94
  95 void StatusBubbleGtk::SetStatusTextToURL() {
  96   GtkWidget* parent = gtk_widget_get_parent(container_.get());
  97
  98   // It appears that parent can be NULL (probably only during shutdown).
  99   if (!parent || !gtk_widget_get_realized(parent))
 100     return;
 101
 102   GtkAllocation allocation;
 103   gtk_widget_get_allocation(parent, &allocation);
 104   int desired_width = allocation.width;
 105   if (!expanded()) {
 106     expand_timer_.Stop();
 107     expand_timer_.Start(FROM_HERE,
 108                         base::TimeDelta::FromMilliseconds(kExpandHoverDelay),
 109                         this, &StatusBubbleGtk::ExpandURL);
 110     // When not expanded, we limit the size to one third the browser's
 111     // width.
 112     desired_width /= 3;
 113   }
 114
 115   // TODO(tc): We don't actually use gfx::Font as the font in the status
 116   // bubble.  We should extend gfx::ElideUrl to take some sort of pango font.
 117   url_text_ = base::UTF16ToUTF8(
 118       gfx::ElideUrl(url_, gfx::FontList(), desired_width, languages_));
 119   SetStatusTextTo(url_text_);
 120 }
 121
 122 void StatusBubbleGtk::Show() {
 123   // If we were going to hide, stop.
 124   hide_timer_.Stop();
 125
 126   gtk_widget_show(container_.get());
 127   GdkWindow* gdk_window = gtk_widget_get_window(container_.get());
 128   if (gdk_window)
 129     gdk_window_raise(gdk_window);
 130 }
 131
 132 void StatusBubbleGtk::Hide() {
 133   // If we were going to expand the bubble, stop.
 134   expand_timer_.Stop();
 135   expand_animation_.reset();
 136
 137   gtk_widget_hide(container_.get());
 138 }
 139
 140 void StatusBubbleGtk::SetStatusTextTo(const std::string& status_utf8) {
 141   if (status_utf8.empty()) {
 142     hide_timer_.Stop();
 143     hide_timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(kHideDelay),
 144                       this, &StatusBubbleGtk::Hide);
 145   } else {
 146     gtk_label_set_text(GTK_LABEL(label_.get()), status_utf8.c_str());
 147     GtkRequisition req;
 148     gtk_widget_size_request(label_.get(), &req);
 149     desired_width_ = req.width;
 150
 151     UpdateLabelSizeRequest();
 152
 153     if (!last_mouse_left_content_) {
 154       // Show the padding and label to update our requisition and then
 155       // re-process the last mouse event -- if the label was empty before or the
 156       // text changed, our size will have changed and we may need to move
 157       // ourselves away from the pointer now.
 158       gtk_widget_show_all(padding_);
 159       MouseMoved(last_mouse_location_, false);
 160     }
 161     Show();
 162   }
 163 }
 164
 165 void StatusBubbleGtk::MouseMoved(
 166     const gfx::Point& location, bool left_content) {
 167   if (left_content && ignore_next_left_content_) {
 168     ignore_next_left_content_ = false;
 169     return;
 170   }
 171
 172   last_mouse_location_ = location;
 173   last_mouse_left_content_ = left_content;
 174
 175   if (!gtk_widget_get_realized(container_.get()))
 176     return;
 177
 178   GtkWidget* parent = gtk_widget_get_parent(container_.get());
 179   if (!parent || !gtk_widget_get_realized(parent))
 180     return;
 181
 182   int old_y_offset = y_offset_;
 183   bool old_flip_horizontally = flip_horizontally_;
 184
 185   if (left_content) {
 186     SetFlipHorizontally(false);
 187     y_offset_ = 0;
 188   } else {
 189     GtkWidget* toplevel = gtk_widget_get_toplevel(container_.get());
 190     if (!toplevel || !gtk_widget_get_realized(toplevel))
 191       return;
 192
 193     bool ltr = !base::i18n::IsRTL();
 194
 195     GtkRequisition requisition;
 196     gtk_widget_size_request(container_.get(), &requisition);
 197
 198     GtkAllocation parent_allocation;
 199     gtk_widget_get_allocation(parent, &parent_allocation);
 200
 201     // Get our base position (that is, not including the current offset)
 202     // relative to the origin of the root window.
 203     gint toplevel_x = 0, toplevel_y = 0;
 204     GdkWindow* gdk_window = gtk_widget_get_window(toplevel);
 205     gdk_window_get_position(gdk_window, &toplevel_x, &toplevel_y);
 206     gfx::Rect parent_rect =
 207         gtk_util::GetWidgetRectRelativeToToplevel(parent);
 208     gfx::Rect bubble_rect(
 209         toplevel_x + parent_rect.x() +
 210             (ltr ? 0 : parent_allocation.width - requisition.width),
 211         toplevel_y + parent_rect.y() +
 212             parent_allocation.height - requisition.height,
 213         requisition.width,
 214         requisition.height);
 215
 216     int left_threshold =
 217         bubble_rect.x() - bubble_rect.height() - kMousePadding;
 218     int right_threshold =
 219         bubble_rect.right() + bubble_rect.height() + kMousePadding;
 220     int top_threshold = bubble_rect.y() - kMousePadding;
 221
 222     if (((ltr && location.x() < right_threshold) ||
 223          (!ltr && location.x() > left_threshold)) &&
 224         location.y() > top_threshold) {
 225       if (download_shelf_is_visible_) {
 226         SetFlipHorizontally(true);
 227         y_offset_ = 0;
 228       } else {
 229         SetFlipHorizontally(false);
 230         int distance = std::max(ltr ?
 231                                     location.x() - right_threshold :
 232                                     left_threshold - location.x(),
 233                                 top_threshold - location.y());
 234         y_offset_ = std::min(-1 * distance, requisition.height);
 235       }
 236     } else {
 237       SetFlipHorizontally(false);
 238       y_offset_ = 0;
 239     }
 240   }
 241
 242   if (y_offset_ != old_y_offset || flip_horizontally_ != old_flip_horizontally)
 243     gtk_widget_queue_resize_no_redraw(parent);
 244 }
 245
 246 void StatusBubbleGtk::UpdateDownloadShelfVisibility(bool visible) {
 247   download_shelf_is_visible_ = visible;
 248 }
 249
 250 void StatusBubbleGtk::Observe(int type,
 251                               const content::NotificationSource& source,
 252                               const content::NotificationDetails& details) {
 253   if (type == chrome::NOTIFICATION_BROWSER_THEME_CHANGED) {
 254     UserChangedTheme();
 255   }
 256 }
 257
 258 void StatusBubbleGtk::InitWidgets() {
 259   bool ltr = !base::i18n::IsRTL();
 260
 261   label_.Own(gtk_label_new(NULL));
 262
 263   padding_ = gtk_alignment_new(0, 0, 1, 1);
 264   gtk_alignment_set_padding(GTK_ALIGNMENT(padding_),
 265       kInternalTopBottomPadding, kInternalTopBottomPadding,
 266       kInternalLeftRightPadding + (ltr ? 0 : kCornerSize),
 267       kInternalLeftRightPadding + (ltr ? kCornerSize : 0));
 268   gtk_container_add(GTK_CONTAINER(padding_), label_.get());
 269   gtk_widget_show_all(padding_);
 270
 271   container_.Own(gtk_event_box_new());
 272   gtk_widget_set_no_show_all(container_.get(), TRUE);
 273   gtk_util::ActAsRoundedWindow(
 274       container_.get(), ui::kGdkWhite, kCornerSize,
 275       gtk_util::ROUNDED_TOP_RIGHT,
 276       gtk_util::BORDER_TOP | gtk_util::BORDER_RIGHT);
 277   gtk_widget_set_name(container_.get(), "status-bubble");
 278   gtk_container_add(GTK_CONTAINER(container_.get()), padding_);
 279
 280   // We need to listen for mouse motion events, since a fast-moving pointer may
 281   // enter our window without us getting any motion events on the browser near
 282   // enough for us to run away.
 283   gtk_widget_add_events(container_.get(), GDK_POINTER_MOTION_MASK |
 284                                           GDK_ENTER_NOTIFY_MASK);
 285   g_signal_connect(container_.get(), "motion-notify-event",
 286                    G_CALLBACK(HandleMotionNotifyThunk), this);
 287   g_signal_connect(container_.get(), "enter-notify-event",
 288                    G_CALLBACK(HandleEnterNotifyThunk), this);
 289
 290   UserChangedTheme();
 291 }
 292
 293 void StatusBubbleGtk::UserChangedTheme() {
 294   if (theme_service_->UsingNativeTheme()) {
 295     gtk_widget_modify_fg(label_.get(), GTK_STATE_NORMAL, NULL);
 296     gtk_widget_modify_bg(container_.get(), GTK_STATE_NORMAL, NULL);
 297   } else {
 298     // TODO(erg): This is the closest to "text that will look good on a
 299     // toolbar" that I can find. Maybe in later iterations of the theme system,
 300     // there will be a better color to pick.
 301     GdkColor bookmark_text =
 302         theme_service_->GetGdkColor(ThemeProperties::COLOR_BOOKMARK_TEXT);
 303     gtk_widget_modify_fg(label_.get(), GTK_STATE_NORMAL, &bookmark_text);
 304
 305     GdkColor toolbar_color =
 306         theme_service_->GetGdkColor(ThemeProperties::COLOR_TOOLBAR);
 307     gtk_widget_modify_bg(container_.get(), GTK_STATE_NORMAL, &toolbar_color);
 308   }
 309
 310   gtk_util::SetRoundedWindowBorderColor(container_.get(),
 311                                         theme_service_->GetBorderColor());
 312 }
 313
 314 void StatusBubbleGtk::SetFlipHorizontally(bool flip_horizontally) {
 315   if (flip_horizontally == flip_horizontally_)
 316     return;
 317
 318   flip_horizontally_ = flip_horizontally;
 319
 320   bool ltr = !base::i18n::IsRTL();
 321   bool on_left = (ltr && !flip_horizontally) || (!ltr && flip_horizontally);
 322
 323   gtk_alignment_set_padding(GTK_ALIGNMENT(padding_),
 324       kInternalTopBottomPadding, kInternalTopBottomPadding,
 325       kInternalLeftRightPadding + (on_left ? 0 : kCornerSize),
 326       kInternalLeftRightPadding + (on_left ? kCornerSize : 0));
 327   // The rounded window code flips these arguments if we're RTL.
 328   gtk_util::SetRoundedWindowEdgesAndBorders(
 329       container_.get(),
 330       kCornerSize,
 331       flip_horizontally ?
 332           gtk_util::ROUNDED_TOP_LEFT :
 333           gtk_util::ROUNDED_TOP_RIGHT,
 334       gtk_util::BORDER_TOP |
 335           (flip_horizontally ? gtk_util::BORDER_LEFT : gtk_util::BORDER_RIGHT));
 336   gtk_widget_queue_draw(container_.get());
 337 }
 338
 339 void StatusBubbleGtk::ExpandURL() {
 340   GtkAllocation allocation;
 341   gtk_widget_get_allocation(label_.get(), &allocation);
 342   start_width_ = allocation.width;
 343   expand_animation_.reset(new gfx::SlideAnimation(this));
 344   expand_animation_->SetTweenType(gfx::Tween::LINEAR);
 345   expand_animation_->Show();
 346
 347   SetStatusTextToURL();
 348 }
 349
 350 void StatusBubbleGtk::UpdateLabelSizeRequest() {
 351   if (!expanded() || !expand_animation_->is_animating()) {
 352     gtk_widget_set_size_request(label_.get(), -1, -1);
 353     return;
 354   }
 355
 356   int new_width = start_width_ +
 357       (desired_width_ - start_width_) * expand_animation_->GetCurrentValue();
 358   gtk_widget_set_size_request(label_.get(), new_width, -1);
 359 }
 360
 361 // See http://crbug.com/68897 for why we have to handle this event.
 362 gboolean StatusBubbleGtk::HandleEnterNotify(GtkWidget* sender,
 363                                             GdkEventCrossing* event) {
 364   ignore_next_left_content_ = true;
 365   MouseMoved(gfx::Point(event->x_root, event->y_root), false);
 366   return FALSE;
 367 }
 368
 369 gboolean StatusBubbleGtk::HandleMotionNotify(GtkWidget* sender,
 370                                              GdkEventMotion* event) {
 371   MouseMoved(gfx::Point(event->x_root, event->y_root), false);
 372   return FALSE;
 373 }
 374
 375 void StatusBubbleGtk::AnimationEnded(const gfx::Animation* animation) {
 376   UpdateLabelSizeRequest();
 377 }
 378
 379 void StatusBubbleGtk::AnimationProgressed(const gfx::Animation* animation) {
 380   UpdateLabelSizeRequest();
 381 }