src/chrome/browser/ui/gtk/find_bar_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/find_bar_gtk.h"
   6
   7 #include <gdk/gdkkeysyms.h>
   8
   9 #include <algorithm>
  10 #include <string>
  11 #include <vector>
  12
  13 #include "base/debug/trace_event.h"
  14 #include "base/i18n/rtl.h"
  15 #include "base/strings/string_number_conversions.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "chrome/browser/chrome_notification_types.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/themes/theme_properties.h"
  21 #include "chrome/browser/ui/browser.h"
  22 #include "chrome/browser/ui/find_bar/find_bar_controller.h"
  23 #include "chrome/browser/ui/find_bar/find_bar_state.h"
  24 #include "chrome/browser/ui/find_bar/find_bar_state_factory.h"
  25 #include "chrome/browser/ui/find_bar/find_notification_details.h"
  26 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
  27 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
  28 #include "chrome/browser/ui/gtk/custom_button.h"
  29 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
  30 #include "chrome/browser/ui/gtk/gtk_util.h"
  31 #include "chrome/browser/ui/gtk/nine_box.h"
  32 #include "chrome/browser/ui/gtk/slide_animator_gtk.h"
  33 #include "chrome/browser/ui/gtk/tab_contents_container_gtk.h"
  34 #include "chrome/browser/ui/gtk/tabs/tab_strip_gtk.h"
  35 #include "chrome/browser/ui/gtk/view_id_util.h"
  36 #include "content/public/browser/native_web_keyboard_event.h"
  37 #include "content/public/browser/notification_source.h"
  38 #include "content/public/browser/render_view_host.h"
  39 #include "content/public/browser/web_contents.h"
  40 #include "content/public/browser/web_contents_view.h"
  41 #include "grit/generated_resources.h"
  42 #include "grit/theme_resources.h"
  43 #include "grit/ui_resources.h"
  44 #include "ui/base/gtk/gtk_floating_container.h"
  45 #include "ui/base/gtk/gtk_hig_constants.h"
  46 #include "ui/base/l10n/l10n_util.h"
  47 #include "ui/base/resource/resource_bundle.h"
  48 #include "ui/gfx/image/cairo_cached_surface.h"
  49 #include "ui/gfx/image/image.h"
  50
  51 using content::NativeWebKeyboardEvent;
  52
  53 namespace {
  54
  55 // Used as the color of the text in the entry box and the text for the results
  56 // label for failure searches.
  57 const GdkColor& kEntryTextColor = ui::kGdkBlack;
  58
  59 // Used as the color of the background of the entry box and the background of
  60 // the find label for successful searches.
  61 const GdkColor& kEntryBackgroundColor = ui::kGdkWhite;
  62 const GdkColor kFindFailureBackgroundColor = GDK_COLOR_RGB(255, 102, 102);
  63 const GdkColor kFindSuccessTextColor = GDK_COLOR_RGB(178, 178, 178);
  64
  65 // Padding around the container.
  66 const int kBarPaddingTop = 2;
  67 const int kBarPaddingBottom = 3;
  68 const int kEntryPaddingLeft = 6;
  69 const int kCloseButtonPadding = 3;
  70 const int kBarPaddingRight = 4;
  71
  72 // The height of the findbar dialog, as dictated by the size of the background
  73 // images.
  74 const int kFindBarHeight = 32;
  75
  76 // The default width of the findbar dialog. It may get smaller if the window
  77 // is narrow.
  78 const int kFindBarWidth = 303;
  79
  80 // The size of the "rounded" corners.
  81 const int kCornerSize = 3;
  82
  83 enum FrameType {
  84   FRAME_MASK,
  85   FRAME_STROKE,
  86 };
  87
  88 // Returns a list of points that either form the outline of the status bubble
  89 // (|type| == FRAME_MASK) or form the inner border around the inner edge
  90 // (|type| == FRAME_STROKE).
  91 std::vector<GdkPoint> MakeFramePolygonPoints(int width,
  92                                              int height,
  93                                              FrameType type) {
  94   using gtk_util::MakeBidiGdkPoint;
  95   std::vector<GdkPoint> points;
  96
  97   bool ltr = !base::i18n::IsRTL();
  98   // If we have a stroke, we have to offset some of our points by 1 pixel.
  99   // We have to inset by 1 pixel when we draw horizontal lines that are on the
 100   // bottom or when we draw vertical lines that are closer to the end (end is
 101   // right for ltr).
 102   int y_off = (type == FRAME_MASK) ? 0 : -1;
 103   // We use this one for LTR.
 104   int x_off_l = ltr ? y_off : 0;
 105   // We use this one for RTL.
 106   int x_off_r = !ltr ? -y_off : 0;
 107
 108   // Top left corner
 109   points.push_back(MakeBidiGdkPoint(x_off_r, 0, width, ltr));
 110   points.push_back(MakeBidiGdkPoint(
 111       kCornerSize + x_off_r, kCornerSize, width, ltr));
 112
 113   // Bottom left corner
 114   points.push_back(MakeBidiGdkPoint(
 115       kCornerSize + x_off_r, height - kCornerSize, width, ltr));
 116   points.push_back(MakeBidiGdkPoint(
 117       (2 * kCornerSize) + x_off_l, height + y_off,
 118       width, ltr));
 119
 120   // Bottom right corner
 121   points.push_back(MakeBidiGdkPoint(
 122       width - (2 * kCornerSize) + x_off_r, height + y_off,
 123       width, ltr));
 124   points.push_back(MakeBidiGdkPoint(
 125       width - kCornerSize + x_off_l, height - kCornerSize, width, ltr));
 126
 127   // Top right corner
 128   points.push_back(MakeBidiGdkPoint(
 129       width - kCornerSize + x_off_l, kCornerSize, width, ltr));
 130   points.push_back(MakeBidiGdkPoint(width + x_off_l, 0, width, ltr));
 131
 132   return points;
 133 }
 134
 135 // Give the findbar dialog its unique shape using images.
 136 void SetDialogShape(GtkWidget* widget) {
 137   static NineBox* dialog_shape = NULL;
 138   if (!dialog_shape) {
 139     dialog_shape = new NineBox(
 140       IDR_FIND_DLG_LEFT_BACKGROUND,
 141       IDR_FIND_DLG_MIDDLE_BACKGROUND,
 142       IDR_FIND_DLG_RIGHT_BACKGROUND,
 143       0, 0, 0, 0, 0, 0);
 144   }
 145
 146   dialog_shape->ContourWidget(widget);
 147 }
 148
 149 // Return a ninebox that will paint the border of the findbar dialog. This is
 150 // shared across all instances of the findbar. Do not free the returned pointer.
 151 const NineBox* GetDialogBorder() {
 152   static NineBox* dialog_border = NULL;
 153   if (!dialog_border) {
 154     dialog_border = new NineBox(
 155       IDR_FIND_DIALOG_LEFT,
 156       IDR_FIND_DIALOG_MIDDLE,
 157       IDR_FIND_DIALOG_RIGHT,
 158       0, 0, 0, 0, 0, 0);
 159   }
 160
 161   return dialog_border;
 162 }
 163
 164 // Like gtk_util::CreateGtkBorderBin, but allows control over the alignment and
 165 // returns both the event box and the alignment so we can modify it during its
 166 // lifetime (i.e. during a theme change).
 167 void BuildBorder(GtkWidget* child,
 168                  int padding_top, int padding_bottom, int padding_left,
 169                  int padding_right,
 170                  GtkWidget** ebox, GtkWidget** alignment) {
 171   *ebox = gtk_event_box_new();
 172   *alignment = gtk_alignment_new(0.0, 0.0, 1.0, 1.0);
 173   gtk_alignment_set_padding(GTK_ALIGNMENT(*alignment),
 174                             padding_top, padding_bottom, padding_left,
 175                             padding_right);
 176   gtk_container_add(GTK_CONTAINER(*alignment), child);
 177   gtk_container_add(GTK_CONTAINER(*ebox), *alignment);
 178 }
 179
 180 }  // namespace
 181
 182 FindBarGtk::FindBarGtk(BrowserWindowGtk* window)
 183     : browser_(window->browser()),
 184       window_(window),
 185       theme_service_(GtkThemeService::GetFrom(browser_->profile())),
 186       container_width_(-1),
 187       container_height_(-1),
 188       match_label_failure_(false),
 189       ignore_changed_signal_(false) {
 190   InitWidgets();
 191   ViewIDUtil::SetID(text_entry_, VIEW_ID_FIND_IN_PAGE_TEXT_FIELD);
 192
 193   // Insert the widget into the browser gtk hierarchy.
 194   window_->AddFindBar(this);
 195
 196   // Hook up signals after the widget has been added to the hierarchy so the
 197   // widget will be realized.
 198   g_signal_connect(text_entry_, "changed",
 199                    G_CALLBACK(OnChanged), this);
 200   g_signal_connect_after(text_entry_, "key-press-event",
 201                          G_CALLBACK(OnKeyPressEvent), this);
 202   g_signal_connect_after(text_entry_, "key-release-event",
 203                          G_CALLBACK(OnKeyReleaseEvent), this);
 204   // When the user tabs to us or clicks on us, save where the focus used to
 205   // be.
 206   g_signal_connect(text_entry_, "focus",
 207                    G_CALLBACK(OnFocus), this);
 208   gtk_widget_add_events(text_entry_, GDK_BUTTON_PRESS_MASK);
 209   g_signal_connect(text_entry_, "button-press-event",
 210                    G_CALLBACK(OnButtonPress), this);
 211   g_signal_connect(text_entry_, "move-cursor", G_CALLBACK(OnMoveCursor), this);
 212   g_signal_connect(text_entry_, "activate", G_CALLBACK(OnActivateThunk), this);
 213   g_signal_connect(text_entry_, "direction-changed",
 214                    G_CALLBACK(OnWidgetDirectionChanged), this);
 215   g_signal_connect(text_entry_, "focus-in-event",
 216                    G_CALLBACK(OnFocusInThunk), this);
 217   g_signal_connect(text_entry_, "focus-out-event",
 218                    G_CALLBACK(OnFocusOutThunk), this);
 219   g_signal_connect(container_, "expose-event",
 220                    G_CALLBACK(OnExpose), this);
 221 }
 222
 223 FindBarGtk::~FindBarGtk() {
 224 }
 225
 226 void FindBarGtk::InitWidgets() {
 227   // The find bar is basically an hbox with a gtkentry (text box) followed by 3
 228   // buttons (previous result, next result, close).  We wrap the hbox in a gtk
 229   // alignment and a gtk event box to get the padding and light blue
 230   // background. We put that event box in a fixed in order to control its
 231   // lateral position. We put that fixed in a SlideAnimatorGtk in order to get
 232   // the slide effect.
 233   GtkWidget* hbox = gtk_hbox_new(false, 0);
 234   container_ = gtk_util::CreateGtkBorderBin(hbox, NULL,
 235       kBarPaddingTop, kBarPaddingBottom,
 236       kEntryPaddingLeft, kBarPaddingRight);
 237   gtk_widget_set_size_request(container_, kFindBarWidth, kFindBarHeight);
 238   ViewIDUtil::SetID(container_, VIEW_ID_FIND_IN_PAGE);
 239   gtk_widget_set_app_paintable(container_, TRUE);
 240
 241   slide_widget_.reset(new SlideAnimatorGtk(container_,
 242                                            SlideAnimatorGtk::DOWN,
 243                                            0, false, true, NULL));
 244
 245   GtkWidget* close_alignment = gtk_alignment_new(0, 0.6, 1, 0);
 246   close_button_.reset(CustomDrawButton::CloseButtonBar(theme_service_));
 247   gtk_container_add(GTK_CONTAINER(close_alignment), close_button_->widget());
 248   gtk_box_pack_end(GTK_BOX(hbox), close_alignment, FALSE, FALSE,
 249                    kCloseButtonPadding);
 250   g_signal_connect(close_button_->widget(), "clicked",
 251                    G_CALLBACK(OnClickedThunk), this);
 252   gtk_widget_set_tooltip_text(close_button_->widget(),
 253       l10n_util::GetStringUTF8(IDS_FIND_IN_PAGE_CLOSE_TOOLTIP).c_str());
 254
 255   find_next_button_.reset(new CustomDrawButton(theme_service_,
 256       IDR_FINDINPAGE_NEXT, IDR_FINDINPAGE_NEXT_H, IDR_FINDINPAGE_NEXT_H,
 257       IDR_FINDINPAGE_NEXT_D, GTK_STOCK_GO_DOWN, GTK_ICON_SIZE_MENU));
 258   g_signal_connect(find_next_button_->widget(), "clicked",
 259                    G_CALLBACK(OnClickedThunk), this);
 260   gtk_widget_set_tooltip_text(find_next_button_->widget(),
 261       l10n_util::GetStringUTF8(IDS_FIND_IN_PAGE_NEXT_TOOLTIP).c_str());
 262   gtk_box_pack_end(GTK_BOX(hbox), find_next_button_->widget(),
 263                    FALSE, FALSE, 0);
 264
 265   find_previous_button_.reset(new CustomDrawButton(theme_service_,
 266       IDR_FINDINPAGE_PREV, IDR_FINDINPAGE_PREV_H, IDR_FINDINPAGE_PREV_H,
 267       IDR_FINDINPAGE_PREV_D, GTK_STOCK_GO_UP, GTK_ICON_SIZE_MENU));
 268   g_signal_connect(find_previous_button_->widget(), "clicked",
 269                    G_CALLBACK(OnClickedThunk), this);
 270   gtk_widget_set_tooltip_text(find_previous_button_->widget(),
 271       l10n_util::GetStringUTF8(IDS_FIND_IN_PAGE_PREVIOUS_TOOLTIP).c_str());
 272   gtk_box_pack_end(GTK_BOX(hbox), find_previous_button_->widget(),
 273                    FALSE, FALSE, 0);
 274
 275   // Make a box for the edit and match count widgets.
 276   GtkWidget* content_hbox = gtk_hbox_new(FALSE, 0);
 277
 278   text_entry_ = gtk_entry_new();
 279   gtk_entry_set_has_frame(GTK_ENTRY(text_entry_), FALSE);
 280
 281   match_count_label_ = gtk_label_new(NULL);
 282   // This line adds padding on the sides so that the label has even padding on
 283   // all edges.
 284   gtk_misc_set_padding(GTK_MISC(match_count_label_), 2, 0);
 285   match_count_event_box_ = gtk_event_box_new();
 286   GtkWidget* match_count_centerer = gtk_vbox_new(FALSE, 0);
 287   gtk_box_pack_start(GTK_BOX(match_count_centerer), match_count_event_box_,
 288                      TRUE, TRUE, 0);
 289   gtk_container_set_border_width(GTK_CONTAINER(match_count_centerer), 1);
 290   gtk_container_add(GTK_CONTAINER(match_count_event_box_), match_count_label_);
 291
 292   gtk_box_pack_end(GTK_BOX(content_hbox), match_count_centerer,
 293                    FALSE, FALSE, 0);
 294   gtk_box_pack_end(GTK_BOX(content_hbox), text_entry_, TRUE, TRUE, 0);
 295
 296   // This event box is necessary to color in the area above and below the match
 297   // count label, and is where we draw the entry background onto in GTK mode.
 298   BuildBorder(content_hbox, 0, 0, 0, 0,
 299               &content_event_box_, &content_alignment_);
 300   gtk_widget_set_app_paintable(content_event_box_, TRUE);
 301   g_signal_connect(content_event_box_, "expose-event",
 302                    G_CALLBACK(OnContentEventBoxExpose), this);
 303
 304   // This alignment isn't centered and is used for spacing in chrome theme
 305   // mode. (It's also used in GTK mode for padding because left padding doesn't
 306   // equal bottom padding naturally.)
 307   BuildBorder(content_event_box_, 2, 2, 2, 0,
 308               &border_bin_, &border_bin_alignment_);
 309   gtk_box_pack_end(GTK_BOX(hbox), border_bin_, TRUE, TRUE, 0);
 310
 311   theme_service_->InitThemesFor(this);
 312   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
 313                  content::Source<ThemeService>(theme_service_));
 314
 315   g_signal_connect(widget(), "parent-set", G_CALLBACK(OnParentSet), this);
 316
 317   // We take care to avoid showing the slide animator widget.
 318   gtk_widget_show_all(container_);
 319   gtk_widget_show(widget());
 320 }
 321
 322 FindBarController* FindBarGtk::GetFindBarController() const {
 323   return find_bar_controller_;
 324 }
 325
 326 void FindBarGtk::SetFindBarController(FindBarController* find_bar_controller) {
 327   find_bar_controller_ = find_bar_controller;
 328 }
 329
 330 void FindBarGtk::Show(bool animate) {
 331   if (animate) {
 332     slide_widget_->Open();
 333     selection_rect_ = gfx::Rect();
 334     Reposition();
 335     GdkWindow* gdk_window = gtk_widget_get_window(container_);
 336     if (gdk_window)
 337       gdk_window_raise(gdk_window);
 338   } else {
 339     slide_widget_->OpenWithoutAnimation();
 340   }
 341 }
 342
 343 void FindBarGtk::Hide(bool animate) {
 344   if (animate)
 345     slide_widget_->Close();
 346   else
 347     slide_widget_->CloseWithoutAnimation();
 348 }
 349
 350 void FindBarGtk::SetFocusAndSelection() {
 351   StoreOutsideFocus();
 352   gtk_widget_grab_focus(text_entry_);
 353   // Select all the text.
 354   gtk_editable_select_region(GTK_EDITABLE(text_entry_), 0, -1);
 355 }
 356
 357 void FindBarGtk::ClearResults(const FindNotificationDetails& results) {
 358   UpdateUIForFindResult(results, string16());
 359 }
 360
 361 void FindBarGtk::StopAnimation() {
 362   slide_widget_->End();
 363 }
 364
 365 void FindBarGtk::MoveWindowIfNecessary(const gfx::Rect& selection_rect,
 366                                        bool no_redraw) {
 367   // Not moving the window on demand, so do nothing.
 368 }
 369
 370 void FindBarGtk::SetFindTextAndSelectedRange(const string16& find_text,
 371                                              const gfx::Range& selected_range) {
 372   std::string find_text_utf8 = UTF16ToUTF8(find_text);
 373
 374   // Ignore the "changed" signal handler because programatically setting the
 375   // text should not fire a "changed" event.
 376   ignore_changed_signal_ = true;
 377   gtk_entry_set_text(GTK_ENTRY(text_entry_), find_text_utf8.c_str());
 378   if (selected_range.IsValid()) {
 379     gtk_editable_select_region(GTK_EDITABLE(text_entry_),
 380                                selected_range.start(), selected_range.end());
 381   }
 382   ignore_changed_signal_ = false;
 383 }
 384
 385 string16 FindBarGtk::GetFindText() {
 386   std::string contents(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
 387   return UTF8ToUTF16(contents);
 388 }
 389
 390 gfx::Range FindBarGtk::GetSelectedRange() {
 391   gint start, end;
 392   gtk_editable_get_selection_bounds(GTK_EDITABLE(text_entry_), &start, &end);
 393   return gfx::Range(start, end);
 394 }
 395
 396 void FindBarGtk::UpdateUIForFindResult(const FindNotificationDetails& result,
 397                                        const string16& find_text) {
 398   selection_rect_ = result.selection_rect();
 399   int xposition = GetDialogPosition(result.selection_rect()).x();
 400   GtkAllocation allocation;
 401   gtk_widget_get_allocation(widget(), &allocation);
 402   if (xposition != allocation.x)
 403     Reposition();
 404
 405   // Once we find a match we no longer want to keep track of what had
 406   // focus. EndFindSession will then set the focus to the page content.
 407   if (result.number_of_matches() > 0)
 408     focus_store_.Store(NULL);
 409
 410   std::string find_text_utf8 = UTF16ToUTF8(find_text);
 411   bool have_valid_range =
 412       result.number_of_matches() != -1 && result.active_match_ordinal() != -1;
 413
 414   std::string entry_text(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
 415   if (entry_text != find_text_utf8)
 416     SetFindTextAndSelectedRange(find_text, gfx::Range(0, find_text.length()));
 417
 418   if (!find_text.empty() && have_valid_range) {
 419     gtk_label_set_text(GTK_LABEL(match_count_label_),
 420         l10n_util::GetStringFUTF8(IDS_FIND_IN_PAGE_COUNT,
 421             base::IntToString16(result.active_match_ordinal()),
 422             base::IntToString16(result.number_of_matches())).c_str());
 423     UpdateMatchLabelAppearance(result.number_of_matches() == 0 &&
 424                                result.final_update());
 425   } else {
 426     // If there was no text entered, we don't show anything in the result count
 427     // area.
 428     gtk_label_set_text(GTK_LABEL(match_count_label_), "");
 429     UpdateMatchLabelAppearance(false);
 430   }
 431 }
 432
 433 void FindBarGtk::AudibleAlert() {
 434   // This call causes a lot of weird bugs, especially when using the custom
 435   // frame. TODO(estade): if people complain, re-enable it. See
 436   // http://crbug.com/27635 and others.
 437   //
 438   //   gtk_widget_error_bell(widget());
 439 }
 440
 441 gfx::Rect FindBarGtk::GetDialogPosition(
 442     const gfx::Rect& avoid_overlapping_rect) {
 443   bool ltr = !base::i18n::IsRTL();
 444   // 15 is the size of the scrollbar, copied from ScrollbarThemeChromium.
 445   // The height is not used.
 446   // At very low browser widths we can wind up with a negative |dialog_bounds|
 447   // width, so clamp it to 0.
 448   GtkAllocation parent_allocation;
 449   gtk_widget_get_allocation(gtk_widget_get_parent(widget()),
 450                             &parent_allocation);
 451   gfx::Rect dialog_bounds = gfx::Rect(ltr ? 0 : 15, 0,
 452       std::max(0, parent_allocation.width - (ltr ? 15 : 0)), 0);
 453
 454   GtkRequisition req;
 455   gtk_widget_size_request(container_, &req);
 456   gfx::Size prefsize(req.width, req.height);
 457
 458   gfx::Rect view_location(
 459       ltr ? dialog_bounds.width() - prefsize.width() : dialog_bounds.x(),
 460       dialog_bounds.y(), prefsize.width(), prefsize.height());
 461   gfx::Rect new_pos = FindBarController::GetLocationForFindbarView(
 462       view_location, dialog_bounds, avoid_overlapping_rect);
 463
 464   return new_pos;
 465 }
 466
 467 bool FindBarGtk::IsFindBarVisible() {
 468   return gtk_widget_get_visible(widget());
 469 }
 470
 471 void FindBarGtk::RestoreSavedFocus() {
 472   // This function sometimes gets called when we don't have focus. We should do
 473   // nothing in this case.
 474   if (!gtk_widget_is_focus(text_entry_))
 475     return;
 476
 477   if (focus_store_.widget())
 478     gtk_widget_grab_focus(focus_store_.widget());
 479   else
 480     find_bar_controller_->web_contents()->GetView()->Focus();
 481 }
 482
 483 bool FindBarGtk::HasGlobalFindPasteboard() {
 484   return false;
 485 }
 486
 487 void FindBarGtk::UpdateFindBarForChangedWebContents() {
 488 }
 489
 490 FindBarTesting* FindBarGtk::GetFindBarTesting() {
 491   return this;
 492 }
 493
 494 void FindBarGtk::Observe(int type,
 495                          const content::NotificationSource& source,
 496                          const content::NotificationDetails& details) {
 497   DCHECK_EQ(type, chrome::NOTIFICATION_BROWSER_THEME_CHANGED);
 498
 499   // Force reshapings of the find bar window.
 500   container_width_ = -1;
 501   container_height_ = -1;
 502
 503   if (theme_service_->UsingNativeTheme()) {
 504     gtk_widget_modify_cursor(text_entry_, NULL, NULL);
 505     gtk_widget_modify_base(text_entry_, GTK_STATE_NORMAL, NULL);
 506     gtk_widget_modify_text(text_entry_, GTK_STATE_NORMAL, NULL);
 507
 508     // Prevent forced font sizes because it causes the jump up and down
 509     // character movement (http://crbug.com/22614), and because it will
 510     // prevent centering of the text entry.
 511     gtk_util::UndoForceFontSize(text_entry_);
 512     gtk_util::UndoForceFontSize(match_count_label_);
 513
 514     gtk_widget_set_size_request(content_event_box_, -1, -1);
 515     gtk_widget_modify_bg(content_event_box_, GTK_STATE_NORMAL, NULL);
 516
 517     // Replicate the normal GtkEntry behaviour by drawing the entry
 518     // background. We set the fake alignment to be the frame thickness.
 519     GtkStyle* style = gtk_rc_get_style(text_entry_);
 520     gint xborder = style->xthickness;
 521     gint yborder = style->ythickness;
 522     gtk_alignment_set_padding(GTK_ALIGNMENT(content_alignment_),
 523                               yborder, yborder, xborder, xborder);
 524
 525     // We leave left padding on the left, even in GTK mode, as it's required
 526     // for the left margin to be equivalent to the bottom margin.
 527     gtk_alignment_set_padding(GTK_ALIGNMENT(border_bin_alignment_),
 528                               0, 0, 1, 0);
 529
 530     // We need this event box to have its own window in GTK mode for doing the
 531     // hacky widget rendering.
 532     gtk_event_box_set_visible_window(GTK_EVENT_BOX(border_bin_), TRUE);
 533     gtk_widget_set_app_paintable(border_bin_, TRUE);
 534
 535     gtk_misc_set_alignment(GTK_MISC(match_count_label_), 0.5, 0.5);
 536   } else {
 537     gtk_widget_modify_cursor(text_entry_, &ui::kGdkBlack, &ui::kGdkGray);
 538     gtk_widget_modify_base(text_entry_, GTK_STATE_NORMAL,
 539                            &kEntryBackgroundColor);
 540     gtk_widget_modify_text(text_entry_, GTK_STATE_NORMAL, &kEntryTextColor);
 541
 542     // Until we switch to vector graphics, force the font size.
 543     gtk_util::ForceFontSizePixels(text_entry_, 13.4);  // 13.4px == 10pt @ 96dpi
 544     gtk_util::ForceFontSizePixels(match_count_label_, 13.4);
 545
 546     // Force the text widget height so it lines up with the buttons regardless
 547     // of font size.
 548     gtk_widget_set_size_request(content_event_box_, -1, 20);
 549     gtk_widget_modify_bg(content_event_box_, GTK_STATE_NORMAL,
 550                          &kEntryBackgroundColor);
 551
 552     gtk_alignment_set_padding(GTK_ALIGNMENT(content_alignment_),
 553                               0.0, 0.0, 0.0, 0.0);
 554
 555     gtk_alignment_set_padding(GTK_ALIGNMENT(border_bin_alignment_),
 556                               2, 2, 3, 0);
 557
 558     // We need this event box to be invisible because we're only going to draw
 559     // on the background (but we can't take it out of the heiarchy entirely
 560     // because we also need it to take up space).
 561     gtk_event_box_set_visible_window(GTK_EVENT_BOX(border_bin_), FALSE);
 562     gtk_widget_set_app_paintable(border_bin_, FALSE);
 563
 564     gtk_misc_set_alignment(GTK_MISC(match_count_label_), 0.5, 1.0);
 565
 566     // This is necessary to make the close button dark enough.
 567     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 568     close_button_->SetBackground(
 569         theme_service_->GetColor(ThemeProperties::COLOR_TAB_TEXT),
 570         rb.GetImageNamed(IDR_CLOSE_1).AsBitmap(),
 571         rb.GetImageNamed(IDR_CLOSE_1).AsBitmap());
 572   }
 573
 574   UpdateMatchLabelAppearance(match_label_failure_);
 575 }
 576
 577 bool FindBarGtk::GetFindBarWindowInfo(gfx::Point* position,
 578                                       bool* fully_visible) {
 579   if (position)
 580     *position = GetPosition();
 581
 582   if (fully_visible) {
 583     *fully_visible = !slide_widget_->IsAnimating() &&
 584                      slide_widget_->IsShowing();
 585   }
 586   return true;
 587 }
 588
 589 string16 FindBarGtk::GetFindSelectedText() {
 590   gint cursor_pos;
 591   gint selection_bound;
 592   g_object_get(G_OBJECT(text_entry_), "cursor-position", &cursor_pos,
 593                NULL);
 594   g_object_get(G_OBJECT(text_entry_), "selection-bound", &selection_bound,
 595                NULL);
 596   std::string contents(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
 597   return UTF8ToUTF16(contents.substr(cursor_pos, selection_bound));
 598 }
 599
 600 string16 FindBarGtk::GetMatchCountText() {
 601   std::string contents(gtk_label_get_text(GTK_LABEL(match_count_label_)));
 602   return UTF8ToUTF16(contents);
 603 }
 604
 605 int FindBarGtk::GetWidth() {
 606   GtkAllocation allocation;
 607   gtk_widget_get_allocation(container_, &allocation);
 608   return allocation.width;
 609 }
 610
 611 void FindBarGtk::FindEntryTextInContents(bool forward_search) {
 612   content::WebContents* web_contents = find_bar_controller_->web_contents();
 613   if (!web_contents)
 614     return;
 615   FindTabHelper* find_tab_helper = FindTabHelper::FromWebContents(web_contents);
 616
 617   std::string new_contents(gtk_entry_get_text(GTK_ENTRY(text_entry_)));
 618
 619   if (new_contents.length() > 0) {
 620     find_tab_helper->StartFinding(UTF8ToUTF16(new_contents), forward_search,
 621                                   false);  // Not case sensitive.
 622   } else {
 623     // The textbox is empty so we reset.
 624     find_tab_helper->StopFinding(FindBarController::kClearSelectionOnPage);
 625     UpdateUIForFindResult(find_tab_helper->find_result(), string16());
 626
 627     // Clearing the text box should also clear the prepopulate state so that
 628     // when we close and reopen the Find box it doesn't show the search we
 629     // just deleted.
 630     FindBarState* find_bar_state = FindBarStateFactory::GetForProfile(
 631         browser_->profile());
 632     find_bar_state->set_last_prepopulate_text(string16());
 633   }
 634 }
 635
 636 void FindBarGtk::UpdateMatchLabelAppearance(bool failure) {
 637   match_label_failure_ = failure;
 638   bool use_gtk = theme_service_->UsingNativeTheme();
 639
 640   if (use_gtk) {
 641     GtkStyle* style = gtk_rc_get_style(text_entry_);
 642     GdkColor normal_bg = style->base[GTK_STATE_NORMAL];
 643     GdkColor normal_text = gtk_util::AverageColors(
 644         style->text[GTK_STATE_NORMAL], style->base[GTK_STATE_NORMAL]);
 645
 646     gtk_widget_modify_bg(match_count_event_box_, GTK_STATE_NORMAL,
 647                          failure ? &kFindFailureBackgroundColor :
 648                          &normal_bg);
 649     gtk_widget_modify_fg(match_count_label_, GTK_STATE_NORMAL,
 650                          failure ? &kEntryTextColor : &normal_text);
 651   } else {
 652     gtk_widget_modify_bg(match_count_event_box_, GTK_STATE_NORMAL,
 653                          failure ? &kFindFailureBackgroundColor :
 654                          &kEntryBackgroundColor);
 655     gtk_widget_modify_fg(match_count_label_, GTK_STATE_NORMAL,
 656                          failure ? &kEntryTextColor : &kFindSuccessTextColor);
 657   }
 658 }
 659
 660 void FindBarGtk::Reposition() {
 661   if (!IsFindBarVisible())
 662     return;
 663
 664   // This will trigger an allocate, which allows us to reposition.
 665   GtkWidget* parent = gtk_widget_get_parent(widget());
 666   if (parent)
 667     gtk_widget_queue_resize(parent);
 668 }
 669
 670 void FindBarGtk::StoreOutsideFocus() {
 671   // |text_entry_| is the only widget in the find bar that can be focused,
 672   // so it's the only one we have to check.
 673   // TODO(estade): when we make the find bar buttons focusable, we'll have
 674   // to change this (same above in RestoreSavedFocus).
 675   if (!gtk_widget_is_focus(text_entry_))
 676     focus_store_.Store(text_entry_);
 677 }
 678
 679 bool FindBarGtk::MaybeForwardKeyEventToRenderer(GdkEventKey* event) {
 680   switch (event->keyval) {
 681     case GDK_Down:
 682     case GDK_Up:
 683     case GDK_Page_Up:
 684     case GDK_Page_Down:
 685       break;
 686     case GDK_Home:
 687     case GDK_End:
 688       if ((event->state & gtk_accelerator_get_default_mod_mask()) ==
 689           GDK_CONTROL_MASK) {
 690         break;
 691       }
 692     // Fall through.
 693     default:
 694       return false;
 695   }
 696
 697   content::WebContents* contents = find_bar_controller_->web_contents();
 698   if (!contents)
 699     return false;
 700
 701   content::RenderViewHost* render_view_host = contents->GetRenderViewHost();
 702
 703   // Make sure we don't have a text field element interfering with keyboard
 704   // input. Otherwise Up and Down arrow key strokes get eaten. "Nom Nom Nom".
 705   render_view_host->ClearFocusedNode();
 706
 707   NativeWebKeyboardEvent wke(reinterpret_cast<GdkEvent*>(event));
 708   render_view_host->ForwardKeyboardEvent(wke);
 709   return true;
 710 }
 711
 712 void FindBarGtk::AdjustTextAlignment() {
 713   PangoDirection content_dir =
 714       pango_find_base_dir(gtk_entry_get_text(GTK_ENTRY(text_entry_)), -1);
 715
 716   GtkTextDirection widget_dir = gtk_widget_get_direction(text_entry_);
 717
 718   // Use keymap or widget direction if content does not have strong direction.
 719   // It matches the behavior of GtkEntry.
 720   if (content_dir == PANGO_DIRECTION_NEUTRAL) {
 721     if (gtk_widget_has_focus(text_entry_)) {
 722       content_dir = gdk_keymap_get_direction(
 723         gdk_keymap_get_for_display(gtk_widget_get_display(text_entry_)));
 724     } else {
 725       if (widget_dir == GTK_TEXT_DIR_RTL)
 726         content_dir = PANGO_DIRECTION_RTL;
 727       else
 728         content_dir = PANGO_DIRECTION_LTR;
 729     }
 730   }
 731
 732   if ((widget_dir == GTK_TEXT_DIR_RTL && content_dir == PANGO_DIRECTION_LTR) ||
 733       (widget_dir == GTK_TEXT_DIR_LTR && content_dir == PANGO_DIRECTION_RTL)) {
 734     gtk_entry_set_alignment(GTK_ENTRY(text_entry_), 1.0);
 735   } else {
 736     gtk_entry_set_alignment(GTK_ENTRY(text_entry_), 0.0);
 737   }
 738 }
 739
 740 gfx::Point FindBarGtk::GetPosition() {
 741   gfx::Point point;
 742
 743   GtkWidget* parent = gtk_widget_get_parent(widget());
 744
 745   GValue value = { 0, };
 746   g_value_init(&value, G_TYPE_INT);
 747   gtk_container_child_get_property(GTK_CONTAINER(parent),
 748                                    widget(), "x", &value);
 749   point.set_x(g_value_get_int(&value));
 750
 751   gtk_container_child_get_property(GTK_CONTAINER(parent),
 752                                    widget(), "y", &value);
 753   point.set_y(g_value_get_int(&value));
 754
 755   g_value_unset(&value);
 756
 757   return point;
 758 }
 759
 760 // static
 761 void FindBarGtk::OnParentSet(GtkWidget* widget, GtkObject* old_parent,
 762                              FindBarGtk* find_bar) {
 763   if (!gtk_widget_get_parent(widget))
 764     return;
 765
 766   g_signal_connect(gtk_widget_get_parent(widget), "set-floating-position",
 767                    G_CALLBACK(OnSetFloatingPosition), find_bar);
 768 }
 769
 770 // static
 771 void FindBarGtk::OnSetFloatingPosition(GtkFloatingContainer* floating_container,
 772                                        GtkAllocation* allocation,
 773                                        FindBarGtk* find_bar) {
 774   GtkWidget* findbar = find_bar->widget();
 775
 776   int xposition = find_bar->GetDialogPosition(find_bar->selection_rect_).x();
 777
 778   GValue value = { 0, };
 779   g_value_init(&value, G_TYPE_INT);
 780   g_value_set_int(&value, xposition);
 781   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
 782                                    findbar, "x", &value);
 783
 784   g_value_set_int(&value, 0);
 785   gtk_container_child_set_property(GTK_CONTAINER(floating_container),
 786                                    findbar, "y", &value);
 787   g_value_unset(&value);
 788 }
 789
 790 // static
 791 gboolean FindBarGtk::OnChanged(GtkWindow* window, FindBarGtk* find_bar) {
 792   find_bar->AdjustTextAlignment();
 793
 794   if (!find_bar->ignore_changed_signal_)
 795     find_bar->FindEntryTextInContents(true);
 796
 797   return FALSE;
 798 }
 799
 800 // static
 801 gboolean FindBarGtk::OnKeyPressEvent(GtkWidget* widget, GdkEventKey* event,
 802                                      FindBarGtk* find_bar) {
 803   if (find_bar->MaybeForwardKeyEventToRenderer(event)) {
 804     return TRUE;
 805   } else if (GDK_Escape == event->keyval) {
 806     find_bar->find_bar_controller_->EndFindSession(
 807         FindBarController::kKeepSelectionOnPage,
 808         FindBarController::kKeepResultsInFindBox);
 809     return TRUE;
 810   } else if (GDK_Return == event->keyval ||
 811              GDK_KP_Enter == event->keyval) {
 812     if ((event->state & gtk_accelerator_get_default_mod_mask()) ==
 813         GDK_CONTROL_MASK) {
 814       find_bar->find_bar_controller_->EndFindSession(
 815           FindBarController::kActivateSelectionOnPage,
 816           FindBarController::kClearResultsInFindBox);
 817       return TRUE;
 818     }
 819
 820     bool forward = (event->state & gtk_accelerator_get_default_mod_mask()) !=
 821                    GDK_SHIFT_MASK;
 822     find_bar->FindEntryTextInContents(forward);
 823     return TRUE;
 824   } else if (GDK_F3 == event->keyval) {
 825     // There is a bug in GTK+ version available with Ubuntu 12.04 which causes
 826     // Shift+Fn key combination getting registered as Fn when used with
 827     // GTK accelerators. And this broke the search backward functionality with
 828     // Shift+F3. This is a workaround to fix the search functionality till we
 829     // have the GTK+ fix available. The GTK+ issue is being tracked under
 830     // https://bugzilla.gnome.org/show_bug.cgi?id=661973
 831     bool forward = (event->state & gtk_accelerator_get_default_mod_mask()) !=
 832                    GDK_SHIFT_MASK;
 833     find_bar->FindEntryTextInContents(forward);
 834     return TRUE;
 835   }
 836   return FALSE;
 837 }
 838
 839 // static
 840 gboolean FindBarGtk::OnKeyReleaseEvent(GtkWidget* widget, GdkEventKey* event,
 841                                        FindBarGtk* find_bar) {
 842   return find_bar->MaybeForwardKeyEventToRenderer(event);
 843 }
 844
 845 void FindBarGtk::OnClicked(GtkWidget* button) {
 846   if (button == close_button_->widget()) {
 847     find_bar_controller_->EndFindSession(
 848         FindBarController::kKeepSelectionOnPage,
 849         FindBarController::kKeepResultsInFindBox);
 850   } else if (button == find_previous_button_->widget() ||
 851              button == find_next_button_->widget()) {
 852     FindEntryTextInContents(button == find_next_button_->widget());
 853   } else {
 854     NOTREACHED();
 855   }
 856 }
 857
 858 // static
 859 gboolean FindBarGtk::OnContentEventBoxExpose(GtkWidget* widget,
 860                                              GdkEventExpose* event,
 861                                              FindBarGtk* bar) {
 862   TRACE_EVENT0("ui::gtk", "FindBarGtk::OnContentEventBoxExpose");
 863   if (bar->theme_service_->UsingNativeTheme()) {
 864     // Draw the text entry background around where we input stuff. Note the
 865     // decrement to |width|. We do this because some theme engines
 866     // (*cough*Clearlooks*cough*) don't do any blending and use thickness to
 867     // make sure that widgets never overlap.
 868     int padding = gtk_widget_get_style(widget)->xthickness;
 869     GdkRectangle rec;
 870     gtk_widget_get_allocation(widget, &rec);
 871     rec.width -= padding;
 872
 873     gtk_util::DrawTextEntryBackground(bar->text_entry_, widget,
 874                                       &event->area, &rec);
 875   }
 876
 877   return FALSE;
 878 }
 879
 880 // Used to handle custom painting of |container_|.
 881 gboolean FindBarGtk::OnExpose(GtkWidget* widget, GdkEventExpose* e,
 882                               FindBarGtk* bar) {
 883   TRACE_EVENT0("ui::gtk", "FindBarGtk::OnExpose");
 884
 885   GtkAllocation allocation;
 886   gtk_widget_get_allocation(widget, &allocation);
 887
 888   if (bar->theme_service_->UsingNativeTheme()) {
 889     if (bar->container_width_ != allocation.width ||
 890         bar->container_height_ != allocation.height) {
 891       std::vector<GdkPoint> mask_points = MakeFramePolygonPoints(
 892           allocation.width, allocation.height, FRAME_MASK);
 893       GdkRegion* mask_region = gdk_region_polygon(&mask_points[0],
 894                                                   mask_points.size(),
 895                                                   GDK_EVEN_ODD_RULE);
 896       // Reset the shape.
 897       GdkWindow* gdk_window = gtk_widget_get_window(widget);
 898       gdk_window_shape_combine_region(gdk_window, NULL, 0, 0);
 899       gdk_window_shape_combine_region(gdk_window, mask_region, 0, 0);
 900       gdk_region_destroy(mask_region);
 901
 902       bar->container_width_ = allocation.width;
 903       bar->container_height_ = allocation.height;
 904     }
 905
 906     GdkDrawable* drawable = GDK_DRAWABLE(e->window);
 907     GdkGC* gc = gdk_gc_new(drawable);
 908     gdk_gc_set_clip_rectangle(gc, &e->area);
 909     GdkColor color = bar->theme_service_->GetBorderColor();
 910     gdk_gc_set_rgb_fg_color(gc, &color);
 911
 912     // Stroke the frame border.
 913     std::vector<GdkPoint> points = MakeFramePolygonPoints(
 914         allocation.width, allocation.height, FRAME_STROKE);
 915     gdk_draw_lines(drawable, gc, &points[0], points.size());
 916
 917     g_object_unref(gc);
 918   } else {
 919     if (bar->container_width_ != allocation.width ||
 920         bar->container_height_ != allocation.height) {
 921       // Reset the shape.
 922       gdk_window_shape_combine_region(gtk_widget_get_window(widget),
 923                                       NULL, 0, 0);
 924       SetDialogShape(bar->container_);
 925
 926       bar->container_width_ = allocation.width;
 927       bar->container_height_ = allocation.height;
 928     }
 929
 930     cairo_t* cr = gdk_cairo_create(gtk_widget_get_window(widget));
 931     gdk_cairo_rectangle(cr, &e->area);
 932     cairo_clip(cr);
 933
 934     gfx::Point tabstrip_origin =
 935         bar->window_->tabstrip()->GetTabStripOriginForWidget(widget);
 936
 937     gtk_util::DrawThemedToolbarBackground(widget, cr, e, tabstrip_origin,
 938                                           bar->theme_service_);
 939
 940     // During chrome theme mode, we need to draw the border around content_hbox
 941     // now instead of when we render |border_bin_|. We don't use stacked event
 942     // boxes to simulate the effect because we need to blend them with this
 943     // background.
 944     GtkAllocation border_allocation;
 945     gtk_widget_get_allocation(bar->border_bin_, &border_allocation);
 946
 947     // Blit the left part of the background image once on the left.
 948     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 949
 950     gfx::CairoCachedSurface* background_left = rb.GetNativeImageNamed(
 951         IDR_FIND_BOX_BACKGROUND_LEFT,
 952         ui::ResourceBundle::RTL_ENABLED).ToCairo();
 953     background_left->SetSource(cr, widget,
 954                                border_allocation.x, border_allocation.y);
 955     cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
 956     cairo_rectangle(cr, border_allocation.x, border_allocation.y,
 957                     background_left->Width(), background_left->Height());
 958     cairo_fill(cr);
 959
 960     // Blit the center part of the background image in all the space between.
 961     gfx::CairoCachedSurface* background =
 962         rb.GetNativeImageNamed(IDR_FIND_BOX_BACKGROUND).ToCairo();
 963     background->SetSource(cr, widget,
 964                           border_allocation.x + background_left->Width(),
 965                           border_allocation.y);
 966     cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
 967     cairo_rectangle(cr,
 968                     border_allocation.x + background_left->Width(),
 969                     border_allocation.y,
 970                     border_allocation.width - background_left->Width(),
 971                     background->Height());
 972     cairo_fill(cr);
 973
 974     cairo_destroy(cr);
 975
 976     // Draw the border.
 977     GetDialogBorder()->RenderToWidget(widget);
 978   }
 979
 980   // Propagate to the container's child.
 981   GtkWidget* child = gtk_bin_get_child(GTK_BIN(widget));
 982   if (child)
 983     gtk_container_propagate_expose(GTK_CONTAINER(widget), child, e);
 984   return TRUE;
 985 }
 986
 987 // static
 988 gboolean FindBarGtk::OnFocus(GtkWidget* text_entry, GtkDirectionType focus,
 989                              FindBarGtk* find_bar) {
 990   find_bar->StoreOutsideFocus();
 991
 992   // Continue propagating the event.
 993   return FALSE;
 994 }
 995
 996 // static
 997 gboolean FindBarGtk::OnButtonPress(GtkWidget* text_entry, GdkEventButton* e,
 998                                    FindBarGtk* find_bar) {
 999   find_bar->StoreOutsideFocus();
1000
1001   // Continue propagating the event.
1002   return FALSE;
1003 }
1004
1005 // static
1006 void FindBarGtk::OnMoveCursor(GtkEntry* entry, GtkMovementStep step, gint count,
1007                               gboolean selection, FindBarGtk* bar) {
1008   static guint signal_id = g_signal_lookup("move-cursor", GTK_TYPE_ENTRY);
1009
1010   GdkEvent* event = gtk_get_current_event();
1011   if (event) {
1012     if ((event->type == GDK_KEY_PRESS || event->type == GDK_KEY_RELEASE) &&
1013         bar->MaybeForwardKeyEventToRenderer(&(event->key))) {
1014       g_signal_stop_emission(entry, signal_id, 0);
1015     }
1016
1017     gdk_event_free(event);
1018   }
1019 }
1020
1021 void FindBarGtk::OnActivate(GtkWidget* entry) {
1022   FindEntryTextInContents(true);
1023 }
1024
1025 gboolean FindBarGtk::OnFocusIn(GtkWidget* entry, GdkEventFocus* event) {
1026   g_signal_connect(gdk_keymap_get_for_display(gtk_widget_get_display(entry)),
1027                    "direction-changed",
1028                    G_CALLBACK(&OnKeymapDirectionChanged), this);
1029
1030   AdjustTextAlignment();
1031
1032   return FALSE;  // Continue propagation.
1033 }
1034
1035 gboolean FindBarGtk::OnFocusOut(GtkWidget* entry, GdkEventFocus* event) {
1036   g_signal_handlers_disconnect_by_func(
1037       gdk_keymap_get_for_display(gtk_widget_get_display(entry)),
1038       reinterpret_cast<gpointer>(&OnKeymapDirectionChanged), this);
1039
1040   return FALSE;  // Continue propagation.
1041 }