[libhandy] Add HdyTab



commit 36cb2f769aae4236452dc6f055187c6bf2baa370
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sun Sep 13 02:26:00 2020 +0500

    Add HdyTab

 doc/meson.build          |    1 +
 src/handy.gresources.xml |    1 +
 src/hdy-tab-private.h    |   46 ++
 src/hdy-tab.c            | 1114 ++++++++++++++++++++++++++++++++++++++++++++++
 src/hdy-tab.ui           |   79 ++++
 src/meson.build          |    1 +
 6 files changed, 1242 insertions(+)
---
diff --git a/doc/meson.build b/doc/meson.build
index a3f13210..af9d3dd4 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -21,6 +21,7 @@ private_headers = [
     'hdy-shadow-helper-private.h',
     'hdy-stackable-box-private.h',
     'hdy-swipe-tracker-private.h',
+    'hdy-tab-private.h',
     'hdy-tab-view-private.h',
     'hdy-types.h',
     'hdy-view-switcher-button-private.h',
diff --git a/src/handy.gresources.xml b/src/handy.gresources.xml
index af868f13..03c7ff3a 100644
--- a/src/handy.gresources.xml
+++ b/src/handy.gresources.xml
@@ -25,6 +25,7 @@
     <file preprocess="xml-stripblanks">hdy-preferences-window.ui</file>
     <file preprocess="xml-stripblanks">hdy-search-bar.ui</file>
     <file preprocess="xml-stripblanks">hdy-status-page.ui</file>
+    <file preprocess="xml-stripblanks">hdy-tab.ui</file>
     <file preprocess="xml-stripblanks">hdy-view-switcher-bar.ui</file>
     <file preprocess="xml-stripblanks">hdy-view-switcher-button.ui</file>
     <file preprocess="xml-stripblanks">hdy-view-switcher-title.ui</file>
diff --git a/src/hdy-tab-private.h b/src/hdy-tab-private.h
new file mode 100644
index 00000000..88e9aa0a
--- /dev/null
+++ b/src/hdy-tab-private.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2020 Purism SPC
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ *
+ * Author: Alexander Mikhaylenko <alexander mikhaylenko puri sm>
+ */
+
+#pragma once
+
+#if !defined(_HANDY_INSIDE) && !defined(HANDY_COMPILATION)
+#error "Only <handy.h> can be included directly."
+#endif
+
+#include <gtk/gtk.h>
+#include "hdy-tab-view.h"
+
+G_BEGIN_DECLS
+
+#define HDY_TYPE_TAB (hdy_tab_get_type())
+
+G_DECLARE_FINAL_TYPE (HdyTab, hdy_tab, HDY, TAB, GtkContainer)
+
+HdyTab *hdy_tab_new (HdyTabView *view,
+                     gboolean    pinned);
+
+void hdy_tab_set_page (HdyTab     *self,
+                       HdyTabPage *page);
+
+gint hdy_tab_get_display_width (HdyTab *self);
+void hdy_tab_set_display_width (HdyTab *self,
+                                gint    width);
+
+gboolean hdy_tab_get_hovering (HdyTab *self);
+void     hdy_tab_set_hovering (HdyTab   *self,
+                               gboolean  hovering);
+
+gboolean hdy_tab_get_dragging (HdyTab *self);
+void     hdy_tab_set_dragging (HdyTab   *self,
+                               gboolean  dragging);
+
+gboolean hdy_tab_get_inverted (HdyTab *self);
+void     hdy_tab_set_inverted (HdyTab   *self,
+                               gboolean  inverted);
+
+G_END_DECLS
diff --git a/src/hdy-tab.c b/src/hdy-tab.c
new file mode 100644
index 00000000..36d4a273
--- /dev/null
+++ b/src/hdy-tab.c
@@ -0,0 +1,1114 @@
+/*
+ * Copyright (C) 2020-2021 Purism SPC
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ *
+ * Author: Alexander Mikhaylenko <alexander mikhaylenko puri sm>
+ */
+
+#include "config.h"
+#include "hdy-tab-private.h"
+
+#include <glib/gi18n-lib.h>
+
+#include "hdy-animation-private.h"
+#include "hdy-bidi-private.h"
+#include "hdy-css-private.h"
+#include "hdy-fading-label-private.h"
+
+#define FADE_WIDTH 18
+#define CLOSE_BTN_ANIMATION_DURATION 150
+
+struct _HdyTab
+{
+  GtkContainer parent_instance;
+
+  GtkWidget *title;
+  GtkWidget *icon_stack;
+  GtkImage *icon;
+  GtkImage *indicator_icon;
+  GtkWidget *indicator_btn;
+  GtkWidget *close_btn;
+
+  GtkGesture *gesture;
+  GdkWindow *window;
+
+  HdyTabView *view;
+  HdyTabPage *page;
+  gboolean pinned;
+  gboolean dragging;
+  gint display_width;
+
+  gboolean hovering;
+  gboolean selected;
+  gboolean inverted;
+  gboolean title_inverted;
+  gboolean close_overlap;
+  gboolean show_close;
+
+  HdyAnimation *close_btn_animation;
+  cairo_pattern_t *gradient;
+  gdouble gradient_opacity;
+
+  GBinding *title_binding;
+};
+
+G_DEFINE_TYPE (HdyTab, hdy_tab, GTK_TYPE_CONTAINER)
+
+enum {
+  PROP_0,
+  PROP_VIEW,
+  PROP_PINNED,
+  PROP_DRAGGING,
+  PROP_PAGE,
+  PROP_DISPLAY_WIDTH,
+  PROP_HOVERING,
+  PROP_INVERTED,
+  LAST_PROP
+};
+
+static GParamSpec *props[LAST_PROP];
+
+static inline void
+set_style_class (GtkWidget   *widget,
+                 const gchar *style_class,
+                 gboolean     enabled)
+{
+  GtkStyleContext *context = gtk_widget_get_style_context (widget);
+
+  if (enabled)
+    gtk_style_context_add_class (context, style_class);
+  else
+    gtk_style_context_remove_class (context, style_class);
+}
+
+static void
+close_btn_animation_value_cb (gdouble  value,
+                              HdyTab  *self)
+{
+  gtk_widget_set_opacity (self->close_btn, value);
+  gtk_widget_queue_draw (GTK_WIDGET (self));
+}
+
+static void
+close_btn_animation_done_cb (HdyTab *self)
+{
+  if (!self->show_close)
+    gtk_widget_set_child_visible (self->close_btn, FALSE);
+
+  g_clear_pointer (&self->close_btn_animation, hdy_animation_unref);
+}
+
+static void
+update_state (HdyTab *self)
+{
+  GtkStateFlags new_state;
+  gboolean show_close;
+
+  new_state = gtk_widget_get_state_flags (GTK_WIDGET (self)) &
+    ~(GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_CHECKED);
+
+  if (self->hovering || self->dragging)
+    new_state |= GTK_STATE_FLAG_PRELIGHT;
+
+  if (self->selected || self->dragging)
+    new_state |= GTK_STATE_FLAG_CHECKED;
+
+  gtk_widget_set_state_flags (GTK_WIDGET (self), new_state, TRUE);
+
+  show_close = self->hovering || self->selected || self->dragging;
+
+  if (self->show_close != show_close) {
+    gdouble opacity = gtk_widget_get_opacity (self->close_btn);
+
+    if (self->close_btn_animation)
+      hdy_animation_stop (self->close_btn_animation);
+
+    self->show_close = show_close;
+
+    if (self->show_close)
+      gtk_widget_set_child_visible (self->close_btn, TRUE);
+
+    self->close_btn_animation =
+      hdy_animation_new (self->close_btn,
+                         opacity,
+                         self->show_close ? 1 : 0,
+                         CLOSE_BTN_ANIMATION_DURATION,
+                         hdy_ease_in_out_cubic,
+                         (HdyAnimationValueCallback) close_btn_animation_value_cb,
+                         (HdyAnimationDoneCallback) close_btn_animation_done_cb,
+                         self);
+
+    hdy_animation_start (self->close_btn_animation);
+  }
+}
+
+static void
+update_tooltip (HdyTab *self)
+{
+  const gchar *tooltip = hdy_tab_page_get_tooltip (self->page);
+
+  if (tooltip)
+    gtk_widget_set_tooltip_markup (GTK_WIDGET (self), tooltip);
+  else
+    gtk_widget_set_tooltip_text (GTK_WIDGET (self),
+                                 hdy_tab_page_get_title (self->page));
+}
+
+static void
+update_title (HdyTab *self)
+{
+  const gchar *title = hdy_tab_page_get_title (self->page);
+  PangoDirection title_direction = PANGO_DIRECTION_NEUTRAL;
+  GtkTextDirection direction = gtk_widget_get_direction (GTK_WIDGET (self));
+  gboolean title_inverted;
+
+  if (title)
+    title_direction = hdy_find_base_dir (title, -1);
+
+  title_inverted =
+    (title_direction == PANGO_DIRECTION_LTR && direction == GTK_TEXT_DIR_RTL) ||
+    (title_direction == PANGO_DIRECTION_RTL && direction == GTK_TEXT_DIR_LTR);
+
+  if (self->title_inverted != title_inverted) {
+    self->title_inverted = title_inverted;
+    gtk_widget_queue_allocate (GTK_WIDGET (self));
+  }
+
+  update_tooltip (self);
+}
+
+static void
+update_icons (HdyTab *self)
+{
+  GIcon *gicon = hdy_tab_page_get_icon (self->page);
+  gboolean loading = hdy_tab_page_get_loading (self->page);
+  GIcon *indicator = hdy_tab_page_get_indicator_icon (self->page);
+  const gchar *name = loading ? "spinner" : "icon";
+
+  if (self->pinned && !gicon)
+    gicon = hdy_tab_view_get_default_icon (self->view);
+
+  gtk_image_set_from_gicon (self->icon, gicon, GTK_ICON_SIZE_BUTTON);
+  gtk_widget_set_visible (self->icon_stack,
+                          (gicon != NULL || loading) &&
+                          (!self->pinned || indicator == NULL));
+  gtk_stack_set_visible_child_name (GTK_STACK (self->icon_stack), name);
+
+  gtk_image_set_from_gicon (self->indicator_icon, indicator, GTK_ICON_SIZE_BUTTON);
+  gtk_widget_set_visible (self->indicator_btn, indicator != NULL);
+}
+
+static void
+update_indicator (HdyTab *self)
+{
+  gboolean activatable = self->page && hdy_tab_page_get_indicator_activatable (self->page);
+  gboolean clickable = activatable && (self->selected || !self->pinned);
+
+  set_style_class (self->indicator_btn, "clickable", clickable);
+}
+
+static void
+update_needs_attention (HdyTab *self)
+{
+  set_style_class (GTK_WIDGET (self), "needs-attention",
+                   hdy_tab_page_get_needs_attention (self->page));
+}
+
+static void
+update_loading (HdyTab *self)
+{
+  update_icons (self);
+  set_style_class (GTK_WIDGET (self), "loading",
+                   hdy_tab_page_get_loading (self->page));
+}
+
+static void
+update_selected (HdyTab *self)
+{
+  self->selected = self->dragging;
+
+  if (self->page)
+    self->selected |= hdy_tab_page_get_selected (self->page);
+
+  update_state (self);
+  update_indicator (self);
+}
+
+static gboolean
+close_idle_cb (HdyTab *self)
+{
+  hdy_tab_view_close_page (self->view, self->page);
+
+  return G_SOURCE_REMOVE;
+}
+
+static void
+close_clicked_cb (HdyTab *self)
+{
+  if (!self->page)
+    return;
+
+  /* When animations are disabled, we don't want to immediately remove the
+   * whole tab mid-click. Instead, defer it until the click has happened.
+   */
+  g_idle_add ((GSourceFunc) close_idle_cb, self);
+}
+
+static void
+indicator_clicked_cb (HdyTab *self)
+{
+  gboolean clickable;
+
+  if (!self->page)
+    return;
+
+  clickable = hdy_tab_page_get_indicator_activatable (self->page) &&
+              (self->selected || !self->pinned);
+
+  if (!clickable) {
+    hdy_tab_view_set_selected_page (self->view, self->page);
+
+    return;
+  }
+
+  g_signal_emit_by_name (self->view, "indicator-activated", self->page);
+}
+
+static void
+ensure_gradient (HdyTab *self)
+{
+  gdouble opacity = gtk_widget_get_opacity (self->close_btn);
+
+  if (self->gradient && self->gradient_opacity == opacity)
+    return;
+
+  g_clear_pointer (&self->gradient, cairo_pattern_destroy);
+
+  self->gradient_opacity = opacity;
+  self->gradient = cairo_pattern_create_linear (0, 0, FADE_WIDTH, 0);
+  cairo_pattern_add_color_stop_rgba (self->gradient, 0, 1, 1, 1, 0);
+  cairo_pattern_add_color_stop_rgba (self->gradient, 1, 1, 1, 1, opacity);
+}
+
+static void
+hdy_tab_destroy (GtkWidget *widget)
+{
+  HdyTab *self = HDY_TAB (widget);
+
+  g_clear_pointer (&self->indicator_btn, gtk_widget_unparent);
+  g_clear_pointer (&self->icon_stack, gtk_widget_unparent);
+  g_clear_pointer (&self->title, gtk_widget_unparent);
+  g_clear_pointer (&self->close_btn, gtk_widget_unparent);
+
+  GTK_WIDGET_CLASS (hdy_tab_parent_class)->destroy (widget);
+}
+
+static void
+hdy_tab_measure (GtkWidget      *widget,
+                 GtkOrientation  orientation,
+                 gint            for_size,
+                 gint           *minimum,
+                 gint           *natural,
+                 gint           *minimum_baseline,
+                 gint           *natural_baseline)
+{
+  HdyTab *self = HDY_TAB (widget);
+  gint min = 0, nat = 0;
+
+  if (orientation == GTK_ORIENTATION_HORIZONTAL) {
+    hdy_css_measure (widget, orientation, NULL, &nat);
+  } else {
+    gint child_min, child_nat;
+
+    gtk_widget_get_preferred_height (self->icon_stack, &child_min, &child_nat);
+    min = MAX (min, child_min);
+    nat = MAX (nat, child_nat);
+
+    gtk_widget_get_preferred_height (self->title, &child_min, &child_nat);
+    min = MAX (min, child_min);
+    nat = MAX (nat, child_nat);
+
+    gtk_widget_get_preferred_height (self->close_btn, &child_min, &child_nat);
+    min = MAX (min, child_min);
+    nat = MAX (nat, child_nat);
+
+    gtk_widget_get_preferred_height (self->indicator_btn, &child_min, &child_nat);
+    min = MAX (min, child_min);
+    nat = MAX (nat, child_nat);
+
+    hdy_css_measure (widget, orientation, &min, &nat);
+  }
+
+  if (minimum)
+    *minimum = min;
+  if (natural)
+    *natural = nat;
+  if (minimum_baseline)
+    *minimum_baseline = -1;
+  if (natural_baseline)
+    *natural_baseline = -1;
+}
+
+static void
+hdy_tab_get_preferred_width (GtkWidget *widget,
+                             gint      *minimum,
+                             gint      *natural)
+{
+  hdy_tab_measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
+                   minimum, natural,
+                   NULL, NULL);
+}
+
+static void
+hdy_tab_get_preferred_height (GtkWidget *widget,
+                              gint      *minimum,
+                              gint      *natural)
+{
+  hdy_tab_measure (widget, GTK_ORIENTATION_VERTICAL, -1,
+                   minimum, natural,
+                   NULL, NULL);
+}
+
+static void
+hdy_tab_get_preferred_width_for_height (GtkWidget *widget,
+                                        gint       height,
+                                        gint      *minimum,
+                                        gint      *natural)
+{
+  hdy_tab_measure (widget, GTK_ORIENTATION_HORIZONTAL, height,
+                   minimum, natural,
+                   NULL, NULL);
+}
+
+static void
+hdy_tab_get_preferred_height_for_width (GtkWidget *widget,
+                                        gint       width,
+                                        gint      *minimum,
+                                        gint      *natural)
+{
+  hdy_tab_measure (widget, GTK_ORIENTATION_VERTICAL, width,
+                   minimum, natural,
+                   NULL, NULL);
+}
+
+static inline void
+measure_child (GtkWidget *child,
+               gint      *width)
+{
+  if (gtk_widget_get_visible (child))
+    gtk_widget_get_preferred_width (child, NULL, width);
+  else
+    *width = 0;
+}
+
+static inline void
+allocate_child (GtkWidget     *child,
+                GtkAllocation *alloc,
+                gint           x,
+                gint           width)
+{
+  GtkAllocation child_alloc = *alloc;
+
+  if (gtk_widget_get_direction (child) == GTK_TEXT_DIR_RTL)
+    child_alloc.x += alloc->width - width - x;
+  else
+    child_alloc.x += x;
+
+  child_alloc.width = width;
+
+  gtk_widget_size_allocate (child, &child_alloc);
+}
+
+static void
+allocate_contents (HdyTab        *self,
+                   GtkAllocation *alloc)
+{
+  gint indicator_width, close_width, icon_width, title_width;
+  gint center_x, center_width = 0;
+  gint start_width = 0, end_width = 0;
+
+  measure_child (self->icon_stack, &icon_width);
+  measure_child (self->title, &title_width);
+  measure_child (self->indicator_btn, &indicator_width);
+  measure_child (self->close_btn, &close_width);
+
+  if (gtk_widget_get_visible (self->indicator_btn)) {
+    if (self->pinned) {
+      /* Center it in a pinned tab */
+      allocate_child (self->indicator_btn, alloc,
+                      (alloc->width - indicator_width) / 2, indicator_width);
+    } else if (self->inverted) {
+      allocate_child (self->indicator_btn, alloc,
+                      alloc->width - indicator_width, indicator_width);
+
+      end_width = indicator_width;
+    } else {
+      allocate_child (self->indicator_btn, alloc, 0, indicator_width);
+
+      start_width = indicator_width;
+    }
+  }
+
+  if (gtk_widget_get_visible (self->close_btn)) {
+    if (self->inverted) {
+      allocate_child (self->close_btn, alloc, 0, close_width);
+
+      start_width = close_width;
+    } else {
+      allocate_child (self->close_btn, alloc,
+                      alloc->width - close_width, close_width);
+
+      if (self->title_inverted)
+        end_width = close_width;
+    }
+  }
+
+  center_width = MIN (alloc->width - start_width - end_width,
+                      icon_width + title_width);
+  center_x = CLAMP ((alloc->width - center_width) / 2,
+                    start_width,
+                    alloc->width - center_width - end_width);
+
+  self->close_overlap = !self->inverted &&
+                        !self->title_inverted &&
+                        gtk_widget_get_visible (self->title) &&
+                        gtk_widget_get_visible (self->close_btn) &&
+                        center_x + center_width > alloc->width - close_width;
+
+  if (gtk_widget_get_visible (self->icon_stack)) {
+    allocate_child (self->icon_stack, alloc, center_x, icon_width);
+
+    center_x += icon_width;
+    center_width -= icon_width;
+  }
+
+  if (gtk_widget_get_visible (self->title))
+    allocate_child (self->title, alloc, center_x, center_width);
+}
+
+static void
+hdy_tab_size_allocate (GtkWidget     *widget,
+                       GtkAllocation *allocation)
+{
+  HdyTab *self = HDY_TAB (widget);
+  gint width_diff = allocation->width;
+  GtkAllocation child_alloc, clip;
+
+  hdy_css_size_allocate_self (widget, allocation);
+
+  gtk_widget_set_allocation (widget, allocation);
+
+  if (self->window)
+    gdk_window_move_resize (self->window,
+                            allocation->x, allocation->y,
+                            allocation->width, allocation->height);
+
+  child_alloc = *allocation;
+  child_alloc.x = 0;
+  child_alloc.y = 0;
+
+  hdy_css_size_allocate_children (widget, &child_alloc);
+
+  width_diff = MAX (0, width_diff - child_alloc.width);
+
+  if (self->icon_stack && self->indicator_btn && self->title && self->close_btn) {
+    gint width = MAX (child_alloc.width, self->display_width - width_diff);
+
+    child_alloc.x += (child_alloc.width - width) / 2;
+    child_alloc.width = width;
+
+    if (width >= 0)
+      allocate_contents (self, &child_alloc);
+  }
+
+  gtk_render_background_get_clip (gtk_widget_get_style_context (widget),
+                                  allocation->x, allocation->y,
+                                  allocation->width, allocation->height,
+                                  &clip);
+
+  gtk_widget_set_clip (widget, &clip);
+}
+
+static void
+hdy_tab_realize (GtkWidget *widget)
+{
+  HdyTab *self = HDY_TAB (widget);
+  GtkAllocation allocation;
+  GdkWindowAttr attributes;
+  GdkWindowAttributesType attributes_mask;
+
+  gtk_widget_set_realized (widget, TRUE);
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  attributes.x = allocation.x;
+  attributes.y = allocation.y;
+  attributes.width = allocation.width;
+  attributes.height = allocation.height;
+  attributes.window_type = GDK_WINDOW_CHILD;
+  attributes.wclass = GDK_INPUT_OUTPUT;
+  attributes.visual = gtk_widget_get_visual (widget);
+  attributes.event_mask = gtk_widget_get_events (widget);
+  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+
+  self->window = gdk_window_new (gtk_widget_get_parent_window (widget),
+                                 &attributes,
+                                 attributes_mask);
+
+  gtk_widget_set_window (widget, self->window);
+  gtk_widget_register_window (widget, self->window);
+
+  gtk_container_forall (GTK_CONTAINER (self),
+                        (GtkCallback) gtk_widget_set_parent_window,
+                        self->window);
+}
+
+static void
+hdy_tab_unrealize (GtkWidget *widget)
+{
+  HdyTab *self = HDY_TAB (widget);
+
+  GTK_WIDGET_CLASS (hdy_tab_parent_class)->unrealize (widget);
+
+  self->window = NULL;
+}
+
+static gint
+get_end_padding (HdyTab *self)
+{
+  GtkWidget *widget = GTK_WIDGET (self);
+  GtkStyleContext *style_context;
+  GtkStateFlags state_flags;
+  GtkBorder border, padding;
+
+  style_context = gtk_widget_get_style_context (widget);
+  state_flags = gtk_widget_get_state_flags (widget);
+
+  gtk_style_context_get_border (style_context, state_flags, &border);
+  gtk_style_context_get_padding (style_context, state_flags, &padding);
+
+  if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
+    return border.left + padding.left;
+  else
+    return border.right + padding.right;
+}
+
+static gboolean
+hdy_tab_draw (GtkWidget *widget,
+              cairo_t   *cr)
+{
+  HdyTab *self = HDY_TAB (widget);
+  gboolean draw_fade = self->close_overlap &&
+                       gtk_widget_get_opacity (self->close_btn) > 0;
+
+  hdy_css_draw (widget, cr);
+
+  gtk_container_propagate_draw (GTK_CONTAINER (self), self->indicator_btn, cr);
+  gtk_container_propagate_draw (GTK_CONTAINER (self), self->icon_stack, cr);
+
+  if (draw_fade) {
+    cairo_save (cr);
+    cairo_push_group (cr);
+  }
+
+  gtk_container_propagate_draw (GTK_CONTAINER (self), self->title, cr);
+
+  if (draw_fade) {
+    gint width = gtk_widget_get_allocated_width (widget);
+    gint height = gtk_widget_get_allocated_height (widget);
+    gint fade_width =
+      gtk_widget_get_allocated_width (self->close_btn) +
+      get_end_padding (self) +
+      gtk_widget_get_margin_end (self->title) +
+      FADE_WIDTH;
+
+    ensure_gradient (self);
+
+    if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) {
+      cairo_translate (cr, fade_width, 0);
+      cairo_scale (cr, -1, 1);
+    } else {
+      cairo_translate (cr, width - fade_width, 0);
+    }
+
+    cairo_set_source (cr, self->gradient);
+    cairo_rectangle (cr, 0, 0, fade_width, height);
+    cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OUT);
+    cairo_fill (cr);
+
+    cairo_pop_group_to_source (cr);
+    cairo_paint (cr);
+    cairo_restore (cr);
+  }
+
+  gtk_container_propagate_draw (GTK_CONTAINER (self), self->close_btn, cr);
+
+  return GDK_EVENT_PROPAGATE;
+}
+
+static void
+hdy_tab_direction_changed (GtkWidget        *widget,
+                           GtkTextDirection  previous_direction)
+{
+  HdyTab *self = HDY_TAB (widget);
+
+  update_title (self);
+
+  GTK_WIDGET_CLASS (hdy_tab_parent_class)->direction_changed (widget,
+                                                              previous_direction);
+}
+
+static void
+hdy_tab_add (GtkContainer *container,
+             GtkWidget    *widget)
+{
+  HdyTab *self = HDY_TAB (container);
+
+  gtk_widget_set_parent (widget, GTK_WIDGET (self));
+
+  if (self->window)
+    gtk_widget_set_parent_window (widget, self->window);
+}
+
+static void
+hdy_tab_remove (GtkContainer *container,
+                GtkWidget    *widget)
+{
+  gtk_container_forall (container,
+                        (GtkCallback) gtk_widget_unparent,
+                        NULL);
+}
+
+static void
+hdy_tab_forall (GtkContainer *container,
+                gboolean      include_internals,
+                GtkCallback   callback,
+                gpointer      callback_data)
+{
+  HdyTab *self = HDY_TAB (container);
+
+  if (!include_internals)
+    return;
+
+  if (self->indicator_btn)
+    callback (self->indicator_btn, callback_data);
+  if (self->icon_stack)
+    callback (self->icon_stack, callback_data);
+  if (self->title)
+    callback (self->title, callback_data);
+  if (self->close_btn)
+    callback (self->close_btn, callback_data);
+}
+
+static void
+hdy_tab_constructed (GObject *object)
+{
+  HdyTab *self = HDY_TAB (object);
+
+  G_OBJECT_CLASS (hdy_tab_parent_class)->constructed (object);
+
+  if (self->pinned) {
+    gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (self)),
+                                 "pinned");
+    gtk_widget_hide (self->title);
+    gtk_widget_hide (self->close_btn);
+    gtk_widget_set_margin_start (self->icon_stack, 0);
+    gtk_widget_set_margin_end (self->icon_stack, 0);
+  }
+
+  g_signal_connect_object (self->view, "notify::default-icon",
+                           G_CALLBACK (update_icons), self,
+                           G_CONNECT_SWAPPED);
+}
+
+static void
+hdy_tab_get_property (GObject    *object,
+                      guint       prop_id,
+                      GValue     *value,
+                      GParamSpec *pspec)
+{
+  HdyTab *self = HDY_TAB (object);
+
+  switch (prop_id) {
+  case PROP_VIEW:
+    g_value_set_object (value, self->view);
+    break;
+
+  case PROP_PAGE:
+    g_value_set_object (value, self->page);
+    break;
+
+  case PROP_PINNED:
+    g_value_set_boolean (value, self->pinned);
+    break;
+
+  case PROP_DRAGGING:
+    g_value_set_boolean (value, hdy_tab_get_dragging (self));
+    break;
+
+  case PROP_DISPLAY_WIDTH:
+    g_value_set_int (value, hdy_tab_get_display_width (self));
+    break;
+
+  case PROP_HOVERING:
+    g_value_set_boolean (value, hdy_tab_get_hovering (self));
+    break;
+
+  case PROP_INVERTED:
+    g_value_set_boolean (value, hdy_tab_get_inverted (self));
+    break;
+
+    default:
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+hdy_tab_set_property (GObject      *object,
+                      guint         prop_id,
+                      const GValue *value,
+                      GParamSpec   *pspec)
+{
+  HdyTab *self = HDY_TAB (object);
+
+  switch (prop_id) {
+  case PROP_VIEW:
+    self->view = g_value_get_object (value);
+    break;
+
+  case PROP_PAGE:
+    hdy_tab_set_page (self, g_value_get_object (value));
+    break;
+
+  case PROP_PINNED:
+    self->pinned = g_value_get_boolean (value);
+    break;
+
+  case PROP_DRAGGING:
+    hdy_tab_set_dragging (self, g_value_get_boolean (value));
+    break;
+
+  case PROP_DISPLAY_WIDTH:
+    hdy_tab_set_display_width (self, g_value_get_int (value));
+    break;
+
+  case PROP_HOVERING:
+    hdy_tab_set_hovering (self, g_value_get_boolean (value));
+    break;
+
+  case PROP_INVERTED:
+    hdy_tab_set_inverted (self, g_value_get_boolean (value));
+    break;
+
+  default:
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+  }
+}
+
+static void
+hdy_tab_dispose (GObject *object)
+{
+  HdyTab *self = HDY_TAB (object);
+
+  hdy_tab_set_page (self, NULL);
+  g_clear_object (&self->gesture);
+
+  G_OBJECT_CLASS (hdy_tab_parent_class)->dispose (object);
+}
+
+static void
+hdy_tab_finalize (GObject *object)
+{
+  HdyTab *self = HDY_TAB (object);
+
+  g_clear_pointer (&self->gradient, cairo_pattern_destroy);
+
+  G_OBJECT_CLASS (hdy_tab_parent_class)->finalize (object);
+}
+
+static void
+hdy_tab_class_init (HdyTabClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+  GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+
+  object_class->dispose = hdy_tab_dispose;
+  object_class->finalize = hdy_tab_finalize;
+  object_class->constructed = hdy_tab_constructed;
+  object_class->get_property = hdy_tab_get_property;
+  object_class->set_property = hdy_tab_set_property;
+
+  widget_class->destroy = hdy_tab_destroy;
+  widget_class->get_preferred_width = hdy_tab_get_preferred_width;
+  widget_class->get_preferred_height = hdy_tab_get_preferred_height;
+  widget_class->get_preferred_width_for_height = hdy_tab_get_preferred_width_for_height;
+  widget_class->get_preferred_height_for_width = hdy_tab_get_preferred_height_for_width;
+  widget_class->size_allocate = hdy_tab_size_allocate;
+  widget_class->realize = hdy_tab_realize;
+  widget_class->unrealize = hdy_tab_unrealize;
+  widget_class->draw = hdy_tab_draw;
+  widget_class->direction_changed = hdy_tab_direction_changed;
+
+  container_class->add = hdy_tab_add;
+  container_class->remove = hdy_tab_remove;
+  container_class->forall = hdy_tab_forall;
+
+  props[PROP_VIEW] =
+    g_param_spec_object ("view",
+                         _("View"),
+                         _("View"),
+                         HDY_TYPE_TAB_VIEW,
+                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+
+  props[PROP_PINNED] =
+    g_param_spec_boolean ("pinned",
+                          _("Pinned"),
+                          _("Pinned"),
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+
+  props[PROP_DRAGGING] =
+    g_param_spec_boolean ("dragging",
+                          _("Dragging"),
+                          _("Dragging"),
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_PAGE] =
+    g_param_spec_object ("page",
+                         _("Page"),
+                         _("Page"),
+                         HDY_TYPE_TAB_PAGE,
+                         G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_DISPLAY_WIDTH] =
+    g_param_spec_int ("display-width",
+                      _("Display Width"),
+                      _("Display Width"),
+                      0, G_MAXINT, 0,
+                      G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_HOVERING] =
+    g_param_spec_boolean ("hovering",
+                          _("Hovering"),
+                          _("Hovering"),
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_INVERTED] =
+    g_param_spec_boolean ("inverted",
+                          _("Inverted"),
+                          _("Inverted"),
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY);
+
+  g_object_class_install_properties (object_class, LAST_PROP, props);
+
+  gtk_widget_class_set_template_from_resource (widget_class,
+                                               "/sm/puri/handy/ui/hdy-tab.ui");
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, title);
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, icon_stack);
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, icon);
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, indicator_icon);
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, indicator_btn);
+  gtk_widget_class_bind_template_child (widget_class, HdyTab, close_btn);
+  gtk_widget_class_bind_template_callback (widget_class, close_clicked_cb);
+  gtk_widget_class_bind_template_callback (widget_class, indicator_clicked_cb);
+
+  gtk_widget_class_set_css_name (widget_class, "tab");
+}
+
+static void
+hdy_tab_init (HdyTab *self)
+{
+  g_type_ensure (HDY_TYPE_FADING_LABEL);
+
+  gtk_widget_init_template (GTK_WIDGET (self));
+
+  self->gesture = gtk_gesture_drag_new (GTK_WIDGET (self));
+}
+
+HdyTab *
+hdy_tab_new (HdyTabView *view,
+             gboolean    pinned)
+{
+  g_return_val_if_fail (HDY_IS_TAB_VIEW (view), NULL);
+
+  return g_object_new (HDY_TYPE_TAB,
+                       "view", view,
+                       "pinned", pinned,
+                       NULL);
+}
+
+void
+hdy_tab_set_page (HdyTab     *self,
+                  HdyTabPage *page)
+{
+  g_return_if_fail (HDY_IS_TAB (self));
+  g_return_if_fail (HDY_IS_TAB_PAGE (page) || page == NULL);
+
+  if (self->page == page)
+    return;
+
+  if (self->page) {
+    g_signal_handlers_disconnect_by_func (self->page, update_selected, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_title, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_tooltip, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_icons, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_indicator, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_needs_attention, self);
+    g_signal_handlers_disconnect_by_func (self->page, update_loading, self);
+    g_clear_pointer (&self->title_binding, g_binding_unbind);
+  }
+
+  g_set_object (&self->page, page);
+
+  if (self->page) {
+    update_selected (self);
+    update_state (self);
+    update_title (self);
+    update_tooltip (self);
+    update_icons (self);
+    update_indicator (self);
+    update_needs_attention (self);
+    update_loading (self);
+
+    g_signal_connect_object (self->page, "notify::selected",
+                             G_CALLBACK (update_selected), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::title",
+                             G_CALLBACK (update_title), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::tooltip",
+                             G_CALLBACK (update_tooltip), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::icon",
+                             G_CALLBACK (update_icons), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::indicator-icon",
+                             G_CALLBACK (update_icons), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::indicator-activatable",
+                             G_CALLBACK (update_indicator), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::needs-attention",
+                             G_CALLBACK (update_needs_attention), self,
+                             G_CONNECT_SWAPPED);
+    g_signal_connect_object (self->page, "notify::loading",
+                             G_CALLBACK (update_loading), self,
+                             G_CONNECT_SWAPPED);
+
+    self->title_binding = g_object_bind_property (self->page, "title",
+                                                  self->title, "label",
+                                                  G_BINDING_SYNC_CREATE);
+
+  }
+
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_PAGE]);
+}
+
+gint
+hdy_tab_get_display_width (HdyTab *self)
+{
+  g_return_val_if_fail (HDY_IS_TAB (self), 0);
+
+  return self->display_width;
+}
+
+void
+hdy_tab_set_display_width (HdyTab *self,
+                           gint    width)
+{
+  g_return_if_fail (HDY_IS_TAB (self));
+  g_return_if_fail (width >= 0);
+
+  if (self->display_width == width)
+    return;
+
+  self->display_width = width;
+
+  gtk_widget_queue_resize (GTK_WIDGET (self));
+
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_DISPLAY_WIDTH]);
+}
+
+gboolean
+hdy_tab_get_hovering (HdyTab *self)
+{
+  g_return_val_if_fail (HDY_IS_TAB (self), FALSE);
+
+  return self->hovering;
+}
+
+void
+hdy_tab_set_hovering (HdyTab   *self,
+                      gboolean  hovering)
+{
+  g_return_if_fail (HDY_IS_TAB (self));
+
+  hovering = !!hovering;
+
+  if (self->hovering == hovering)
+    return;
+
+  self->hovering = hovering;
+
+  update_state (self);
+
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_HOVERING]);
+}
+
+gboolean
+hdy_tab_get_dragging (HdyTab *self)
+{
+  g_return_val_if_fail (HDY_IS_TAB (self), FALSE);
+
+  return self->dragging;
+}
+
+void
+hdy_tab_set_dragging (HdyTab   *self,
+                      gboolean  dragging)
+{
+  g_return_if_fail (HDY_IS_TAB (self));
+
+  dragging = !!dragging;
+
+  if (self->dragging == dragging)
+    return;
+
+  self->dragging = dragging;
+
+  update_state (self);
+  update_selected (self);
+
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_DRAGGING]);
+}
+
+gboolean
+hdy_tab_get_inverted (HdyTab *self)
+{
+  g_return_val_if_fail (HDY_IS_TAB (self), FALSE);
+
+  return self->inverted;
+}
+
+void
+hdy_tab_set_inverted (HdyTab   *self,
+                      gboolean  inverted)
+{
+  g_return_if_fail (HDY_IS_TAB (self));
+
+  inverted = !!inverted;
+
+  if (self->inverted == inverted)
+    return;
+
+  self->inverted = inverted;
+
+  gtk_widget_queue_allocate (GTK_WIDGET (self));
+
+  g_object_notify_by_pspec (G_OBJECT (self), props[PROP_INVERTED]);
+}
diff --git a/src/hdy-tab.ui b/src/hdy-tab.ui
new file mode 100644
index 00000000..634f6d55
--- /dev/null
+++ b/src/hdy-tab.ui
@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk+" version="3.24"/>
+  <template class="HdyTab" parent="GtkContainer">
+    <property name="can-focus">True</property>
+    <child>
+      <object class="GtkButton" id="indicator_btn">
+        <property name="visible">True</property>
+        <property name="can-focus">False</property>
+        <property name="valign">center</property>
+        <property name="halign">start</property>
+        <signal name="clicked" handler="indicator_clicked_cb" swapped="true"/>
+        <style>
+          <class name="tab-indicator"/>
+        </style>
+        <child>
+          <object class="GtkImage" id="indicator_icon">
+            <property name="visible">True</property>
+          </object>
+        </child>
+      </object>
+    </child>
+    <child>
+      <object class="GtkStack" id="icon_stack">
+        <property name="visible">True</property>
+        <property name="margin-start">4</property>
+        <property name="margin-end">2</property>
+        <child>
+          <object class="GtkImage" id="icon">
+            <property name="visible">True</property>
+            <style>
+              <class name="tab-icon"/>
+            </style>
+          </object>
+          <packing>
+            <property name="name">icon</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkSpinner">
+            <property name="visible">True</property>
+            <property name="active">True</property>
+          </object>
+          <packing>
+            <property name="name">spinner</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+    <child>
+      <object class="HdyFadingLabel" id="title">
+        <property name="visible">True</property>
+        <property name="margin-start">4</property>
+        <property name="margin-end">4</property>
+        <style>
+          <class name="tab-title"/>
+        </style>
+      </object>
+    </child>
+    <child>
+      <object class="GtkButton" id="close_btn">
+        <property name="visible">True</property>
+        <property name="opacity">0</property>
+        <property name="valign">center</property>
+        <property name="can-focus">False</property>
+        <signal name="clicked" handler="close_clicked_cb" swapped="true"/>
+        <style>
+          <class name="tab-close-button"/>
+        </style>
+        <child>
+          <object class="GtkImage">
+            <property name="visible">True</property>
+            <property name="icon-name">window-close-symbolic</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>
diff --git a/src/meson.build b/src/meson.build
index 8cc40385..7f916f98 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -156,6 +156,7 @@ src_sources = [
   'hdy-swipe-group.c',
   'hdy-swipe-tracker.c',
   'hdy-swipeable.c',
+  'hdy-tab.c',
   'hdy-tab-view.c',
   'hdy-title-bar.c',
   'hdy-value-object.c',


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