Panels refactor: Support browserless panels on Linux.

chrome/browser/ui/panels/panel_titlebar_gtk.cc

Index: chrome/browser/ui/panels/panel_titlebar_gtk.cc
diff --git a/chrome/browser/ui/panels/panel_titlebar_gtk.cc b/chrome/browser/ui/panels/panel_titlebar_gtk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e15f9c6762887393d3177e36efa99b278157996c
--- /dev/null
+++ b/chrome/browser/ui/panels/panel_titlebar_gtk.cc
@@ -0,0 +1,311 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/panels/panel_titlebar_gtk.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/ui/gtk/custom_button.h"
+#include "chrome/browser/ui/gtk/gtk_theme_service.h"
+#include "chrome/browser/ui/gtk/gtk_util.h"
+#include "chrome/browser/ui/panels/panel.h"
+#include "chrome/browser/ui/panels/panel_gtk.h"
+#include "content/public/browser/web_contents.h"
+#include "grit/generated_resources.h"
+#include "grit/theme_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/gtk/gtk_compat.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/skia_utils_gtk.h"
+
+namespace {
+
+// Padding around the titlebar.
+const int kPanelTitlebarPaddingTop = 7;
+const int kPanelTitlebarPaddingBottom = 7;
+const int kPanelTitlebarPaddingLeft = 4;
+const int kPanelTitlebarPaddingRight = 8;
+
+// Spacing between buttons of panel's titlebar.
+const int kPanelButtonSpacing = 5;
+
+// Spacing between the icon and the title text.
+const int kPanelIconTitleSpacing = 9;
+
+// Color used to draw title text under default theme.
+const SkColor kTitleTextDefaultColor = SkColorSetRGB(0xf9, 0xf9, 0xf9);
+
+// Markup used to paint the title with the desired font.
+const char* const kTitleMarkupPrefix = "<span face='Arial' size='11264'>";
+const char* const kTitleMarkupSuffix = "</span>";
+
+}  // namespace
+
+PanelTitlebarGtk::PanelTitlebarGtk(PanelGtk* panel_gtk)
+    : panel_gtk_(panel_gtk),
+      container_(NULL),
+      titlebar_right_buttons_vbox_(NULL),
+      titlebar_right_buttons_hbox_(NULL),
+      icon_(NULL),
+      title_(NULL),
+      theme_service_(GtkThemeService::GetFrom(panel_gtk_->panel()->profile())) {
+}
+
+PanelTitlebarGtk::~PanelTitlebarGtk() {
+}
+
+void PanelTitlebarGtk::Init() {
+  container_ = gtk_event_box_new();
+  gtk_widget_set_name(container_, "chrome-panel-titlebar");
+  gtk_event_box_set_visible_window(GTK_EVENT_BOX(container_), FALSE);
+
+  // We use an alignment to control the titlebar paddings.
+  GtkWidget* container_alignment = gtk_alignment_new(0.0, 0.0, 1.0, 1.0);
+  gtk_container_add(GTK_CONTAINER(container_), container_alignment);
+  gtk_alignment_set_padding(GTK_ALIGNMENT(container_alignment),
+                            kPanelTitlebarPaddingTop,
+                            kPanelTitlebarPaddingBottom,
+                            kPanelTitlebarPaddingLeft,
+                            kPanelTitlebarPaddingRight);
+
+  // Add a container box.
+  GtkWidget* container_hbox = gtk_hbox_new(FALSE, 0);
+  gtk_container_add(GTK_CONTAINER(container_alignment), container_hbox);
+
+  // Add minimize/restore and close buttons. Panel buttons are always placed
+  // on the right part of the titlebar.
+  titlebar_right_buttons_vbox_ = gtk_vbox_new(FALSE, 0);
+  gtk_box_pack_end(GTK_BOX(container_hbox), titlebar_right_buttons_vbox_,
+                   FALSE, FALSE, 0);
+  BuildButtons();
+
+  // Add hbox for holding icon and title.
+  GtkWidget* icon_title_hbox = gtk_hbox_new(FALSE, kPanelIconTitleSpacing);
+  gtk_box_pack_start(GTK_BOX(container_hbox), icon_title_hbox, TRUE, TRUE, 0);
+
+  // Add icon. We use the app logo as a placeholder image so the title doesn't
+  // jump around.
+  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+  icon_ = gtk_image_new_from_pixbuf(rb.GetNativeImageNamed(
+      IDR_PRODUCT_LOGO_16, ui::ResourceBundle::RTL_ENABLED).ToGdkPixbuf());
+  g_object_set_data(G_OBJECT(icon_), "left-align-popup",
+                    reinterpret_cast<void*>(true));
+  gtk_box_pack_start(GTK_BOX(icon_title_hbox), icon_, FALSE, FALSE, 0);
+
+  // Add title.
+  title_ = gtk_label_new(NULL);
+  gtk_label_set_ellipsize(GTK_LABEL(title_), PANGO_ELLIPSIZE_END);
+  gtk_misc_set_alignment(GTK_MISC(title_), 0.0, 0.5);
+  gtk_box_pack_start(GTK_BOX(icon_title_hbox), title_, TRUE, TRUE, 0);
+  UpdateTitleAndIcon();
+  UpdateTextColor();
+
+  gtk_widget_show_all(container_);
+}
+
+SkColor PanelTitlebarGtk::GetTextColor() const {
+  if (panel_gtk_->UsingDefaultTheme())
+    return kTitleTextDefaultColor;
+  return theme_service_->GetColor(panel_gtk_->paint_state() ==
+      PanelGtk::PAINT_AS_ACTIVE ?
+          ThemeService::COLOR_TAB_TEXT :
+          ThemeService::COLOR_BACKGROUND_TAB_TEXT);
+}
+
+void PanelTitlebarGtk::BuildButtons() {
+  minimize_button_.reset(CreateButton(panel::MINIMIZE_BUTTON));
+  restore_button_.reset(CreateButton(panel::RESTORE_BUTTON));
+  close_button_.reset(CreateButton(panel::CLOSE_BUTTON));
+
+  // We control visibility of minimize and restore buttons.
+  gtk_widget_set_no_show_all(minimize_button_->widget(), TRUE);
+  gtk_widget_set_no_show_all(restore_button_->widget(), TRUE);
+
+  // Now show the correct widgets in the two hierarchies.
+  UpdateMinimizeRestoreButtonVisibility();
+}
+
+CustomDrawButton* PanelTitlebarGtk::CreateButton(
+    panel::TitlebarButtonType button_type) {
+  int normal_image_id = -1;
+  int pressed_image_id = -1;
+  int hover_image_id = -1;
+  int tooltip_id = -1;
+  GetButtonResources(button_type, &normal_image_id, &pressed_image_id,
+                     &hover_image_id, &tooltip_id);
+
+  CustomDrawButton* button = new CustomDrawButton(normal_image_id,
+                                                  pressed_image_id,
+                                                  hover_image_id,
+                                                  0);
+  gtk_widget_add_events(GTK_WIDGET(button->widget()), GDK_POINTER_MOTION_MASK);
+  g_signal_connect(button->widget(), "clicked",
+                   G_CALLBACK(OnButtonClickedThunk), this);
+
+  std::string localized_tooltip = l10n_util::GetStringUTF8(tooltip_id);
+  gtk_widget_set_tooltip_text(button->widget(),
+                              localized_tooltip.c_str());
+
+  GtkWidget* box = GetButtonHBox();
+  gtk_box_pack_start(GTK_BOX(box), button->widget(), FALSE, FALSE, 0);
+  return button;
+}
+
+void PanelTitlebarGtk::GetButtonResources(
+    panel::TitlebarButtonType button_type,
+    int* normal_image_id,
+    int* pressed_image_id,
+    int* hover_image_id,
+    int* tooltip_id) const {
+  switch (button_type) {
+    case panel::CLOSE_BUTTON:
+      *normal_image_id = IDR_PANEL_CLOSE;
+      *pressed_image_id = IDR_PANEL_CLOSE_C;
+      *hover_image_id = IDR_PANEL_CLOSE_H;
+      *tooltip_id = IDS_PANEL_CLOSE_TOOLTIP;
+      break;
+    case panel::MINIMIZE_BUTTON:
+      *normal_image_id = IDR_PANEL_MINIMIZE;
+      *pressed_image_id = IDR_PANEL_MINIMIZE_C;
+      *hover_image_id = IDR_PANEL_MINIMIZE_H;
+      *tooltip_id = IDS_PANEL_MINIMIZE_TOOLTIP;
+      break;
+    case panel::RESTORE_BUTTON:
+      *normal_image_id = IDR_PANEL_RESTORE;
+      *pressed_image_id = IDR_PANEL_RESTORE_C;
+      *hover_image_id = IDR_PANEL_RESTORE_H;
+      *tooltip_id = IDS_PANEL_RESTORE_TOOLTIP;
+      break;
+  }
+}
+
+GtkWidget* PanelTitlebarGtk::GetButtonHBox() {
+  if (!titlebar_right_buttons_hbox_) {
+    // We put the minimize/restore/close buttons in a vbox so they are top
+    // aligned (up to padding) and don't vertically stretch.
+    titlebar_right_buttons_hbox_ = gtk_hbox_new(FALSE, kPanelButtonSpacing);
+    gtk_box_pack_start(GTK_BOX(titlebar_right_buttons_vbox_),
+                       titlebar_right_buttons_hbox_, FALSE, FALSE, 0);
+  }
+
+  return titlebar_right_buttons_hbox_;
+}
+
+void PanelTitlebarGtk::UpdateTitleAndIcon() {
+  std::string title_text =
+      UTF16ToUTF8(panel_gtk_->panel()->GetWindowTitle());
+
+  // Add the markup to show the title in the desired font.
+  gchar* escaped_title_text = g_markup_escape_text(title_text.c_str(), -1);
+  gchar* title_text_with_markup = g_strconcat(kTitleMarkupPrefix,
+                                              escaped_title_text,
+                                              kTitleMarkupSuffix,
+                                              NULL);
+  gtk_label_set_markup(GTK_LABEL(title_), title_text_with_markup);
+  g_free(escaped_title_text);
+  g_free(title_text_with_markup);
+}
+
+void PanelTitlebarGtk::UpdateThrobber(
+    content::WebContents* web_contents) {
+  if (web_contents && web_contents->IsLoading()) {
+    GdkPixbuf* icon_pixbuf =
+        throbber_.GetNextFrame(web_contents->IsWaitingForResponse());
+    gtk_image_set_from_pixbuf(GTK_IMAGE(icon_), icon_pixbuf);
+  } else {
+    ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+
+    SkBitmap icon = panel_gtk_->panel()->GetCurrentPageIcon();
+    if (icon.empty()) {
+      // Fallback to the Chromium icon if the page has no icon.
+      gtk_image_set_from_pixbuf(GTK_IMAGE(icon_),
+          rb.GetNativeImageNamed(IDR_PRODUCT_LOGO_16).ToGdkPixbuf());
+    } else {
+      GdkPixbuf* icon_pixbuf = gfx::GdkPixbufFromSkBitmap(icon);
+      gtk_image_set_from_pixbuf(GTK_IMAGE(icon_), icon_pixbuf);
+      g_object_unref(icon_pixbuf);
+    }
+
+    throbber_.Reset();
+  }
+}
+
+void PanelTitlebarGtk::UpdateTextColor() {
+  GdkColor text_color = gfx::SkColorToGdkColor(GetTextColor());
+  gtk_util::SetLabelColor(title_, &text_color);
+}
+
+void PanelTitlebarGtk::UpdateMinimizeRestoreButtonVisibility() {
+  Panel* panel = panel_gtk_->panel();
+  gtk_widget_set_visible(minimize_button_->widget(), panel->CanMinimize());
+  gtk_widget_set_visible(restore_button_->widget(), panel->CanRestore());
+}
+
+void PanelTitlebarGtk::OnButtonClicked(GtkWidget* button) {
+  Panel* panel = panel_gtk_->panel();
+  if (close_button_->widget() == button) {
+    panel->Close();
+    return;
+  }
+
+  GdkEvent* event = gtk_get_current_event();
+  DCHECK(event && event->type == GDK_BUTTON_RELEASE);
+
+  if (minimize_button_->widget() == button) {
+    panel->OnMinimizeButtonClicked(
+        (event->button.state & GDK_CONTROL_MASK) ?
+            panel::APPLY_TO_ALL : panel::NO_MODIFIER);
+  } else if (restore_button_->widget() == button) {
+    panel->OnRestoreButtonClicked(
+        (event->button.state & GDK_CONTROL_MASK) ?
+            panel::APPLY_TO_ALL : panel::NO_MODIFIER);
+  }
+
+  gdk_event_free(event);
+}
+
+void PanelTitlebarGtk::SendEnterNotifyToCloseButtonIfUnderMouse() {
+  if (!close_button())
+    return;
+
+  gint x;
+  gint y;
+  GtkAllocation widget_allocation = close_button()->WidgetAllocation();
+  gtk_widget_get_pointer(GTK_WIDGET(close_button()->widget()), &x, &y);
+
+  gfx::Rect button_rect(0, 0, widget_allocation.width,
+                        widget_allocation.height);
+  if (!button_rect.Contains(x, y)) {
+    // Mouse is not over the close button.
+    return;
+  }
+
+  // Create and emit an enter-notify-event on close button.
+  GValue return_value;
+  return_value.g_type = G_TYPE_BOOLEAN;
+  g_value_set_boolean(&return_value, false);
+
+  GdkEvent* event = gdk_event_new(GDK_ENTER_NOTIFY);
+  event->crossing.window =
+      gtk_button_get_event_window(GTK_BUTTON(close_button()->widget()));
+  event->crossing.send_event = FALSE;
+  event->crossing.subwindow = gtk_widget_get_window(close_button()->widget());
+  event->crossing.time = gtk_util::XTimeNow();
+  event->crossing.x = x;
+  event->crossing.y = y;
+  event->crossing.x_root = widget_allocation.x;
+  event->crossing.y_root = widget_allocation.y;
+  event->crossing.mode = GDK_CROSSING_NORMAL;
+  event->crossing.detail = GDK_NOTIFY_ANCESTOR;
+  event->crossing.focus = true;
+  event->crossing.state = 0;
+
+  g_signal_emit_by_name(GTK_OBJECT(close_button()->widget()),
+                        "enter-notify-event", event,
+                        &return_value);
+}
+
+GtkWidget* PanelTitlebarGtk::widget() const {
+  return container_;
+}