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// 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 <gtk/gtk.h>
#include <math.h>
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "remoting/base/string_resources.h"
#include "remoting/host/client_session_control.h"
#include "remoting/host/host_window.h"
#include "ui/base/glib/glib_signal.h"
#include "ui/base/l10n/l10n_util.h"
namespace remoting {
namespace {
class DisconnectWindowGtk : public HostWindow {
public:
DisconnectWindowGtk();
~DisconnectWindowGtk() override;
// HostWindow overrides.
void Start(const base::WeakPtr<ClientSessionControl>& client_session_control)
override;
private:
CHROMEG_CALLBACK_1(DisconnectWindowGtk, gboolean, OnDelete,
GtkWidget*, GdkEvent*);
CHROMEG_CALLBACK_0(DisconnectWindowGtk, void, OnClicked, GtkButton*);
CHROMEG_CALLBACK_1(DisconnectWindowGtk, gboolean, OnConfigure,
GtkWidget*, GdkEventConfigure*);
CHROMEG_CALLBACK_1(DisconnectWindowGtk, gboolean, OnButtonPress,
GtkWidget*, GdkEventButton*);
// Used to disconnect the client session.
base::WeakPtr<ClientSessionControl> client_session_control_;
GtkWidget* disconnect_window_;
GtkWidget* message_;
GtkWidget* button_;
// Used to distinguish resize events from other types of "configure-event"
// notifications.
int current_width_;
int current_height_;
DISALLOW_COPY_AND_ASSIGN(DisconnectWindowGtk);
};
// Helper function for creating a rectangular path with rounded corners, as
// Cairo doesn't have this facility. |radius| is the arc-radius of each
// corner. The bounding rectangle extends from (0, 0) to (width, height).
void AddRoundRectPath(cairo_t* cairo_context, int width, int height,
int radius) {
cairo_new_sub_path(cairo_context);
cairo_arc(cairo_context, width - radius, radius, radius, -M_PI_2, 0);
cairo_arc(cairo_context, width - radius, height - radius, radius, 0, M_PI_2);
cairo_arc(cairo_context, radius, height - radius, radius, M_PI_2, 2 * M_PI_2);
cairo_arc(cairo_context, radius, radius, radius, 2 * M_PI_2, 3 * M_PI_2);
cairo_close_path(cairo_context);
}
DisconnectWindowGtk::DisconnectWindowGtk()
: disconnect_window_(nullptr),
current_width_(0),
current_height_(0) {
}
DisconnectWindowGtk::~DisconnectWindowGtk() {
DCHECK(CalledOnValidThread());
if (disconnect_window_) {
gtk_widget_destroy(disconnect_window_);
disconnect_window_ = nullptr;
}
}
void DisconnectWindowGtk::Start(
const base::WeakPtr<ClientSessionControl>& client_session_control) {
DCHECK(CalledOnValidThread());
DCHECK(!client_session_control_.get());
DCHECK(client_session_control.get());
DCHECK(!disconnect_window_);
client_session_control_ = client_session_control;
// Create the window.
disconnect_window_ = gtk_window_new(GTK_WINDOW_TOPLEVEL);
GtkWindow* window = GTK_WINDOW(disconnect_window_);
g_signal_connect(disconnect_window_, "delete-event",
G_CALLBACK(OnDeleteThunk), this);
gtk_window_set_title(window,
l10n_util::GetStringUTF8(IDS_PRODUCT_NAME).c_str());
gtk_window_set_resizable(window, FALSE);
// Try to keep the window always visible.
gtk_window_stick(window);
gtk_window_set_keep_above(window, TRUE);
// Remove window titlebar.
gtk_window_set_decorated(window, FALSE);
// In case the titlebar is still there, try to remove some of the buttons.
// Utility windows have no minimize button or taskbar presence.
gtk_window_set_type_hint(window, GDK_WINDOW_TYPE_HINT_UTILITY);
gtk_window_set_deletable(window, FALSE);
// Allow custom rendering of the background pixmap.
gtk_widget_set_app_paintable(disconnect_window_, TRUE);
// Handle window resizing, to regenerate the background pixmap and window
// shape bitmap. The stored width & height need to be initialized here
// in case the window is created a second time (the size of the previous
// window would be remembered, preventing the generation of bitmaps for the
// new window).
current_height_ = current_width_ = 0;
g_signal_connect(disconnect_window_, "configure-event",
G_CALLBACK(OnConfigureThunk), this);
// Handle mouse events to allow the user to drag the window around.
gtk_widget_set_events(disconnect_window_, GDK_BUTTON_PRESS_MASK);
g_signal_connect(disconnect_window_, "button-press-event",
G_CALLBACK(OnButtonPressThunk), this);
// All magic numbers taken from screen shots provided by UX.
// The alignment sets narrow margins at the top and bottom, compared with
// left and right. The left margin is made larger to accommodate the
// window movement gripper.
GtkWidget* align = gtk_alignment_new(0, 0, 1, 1);
gtk_alignment_set_padding(GTK_ALIGNMENT(align), 8, 8, 24, 12);
gtk_container_add(GTK_CONTAINER(window), align);
GtkWidget* button_row = gtk_hbox_new(FALSE, 12);
gtk_container_add(GTK_CONTAINER(align), button_row);
button_ = gtk_button_new_with_label(
l10n_util::GetStringUTF8(IDS_STOP_SHARING_BUTTON).c_str());
gtk_box_pack_end(GTK_BOX(button_row), button_, FALSE, FALSE, 0);
g_signal_connect(button_, "clicked", G_CALLBACK(OnClickedThunk), this);
message_ = gtk_label_new(nullptr);
gtk_box_pack_end(GTK_BOX(button_row), message_, FALSE, FALSE, 0);
// Override any theme setting for the text color, so that the text is
// readable against the window's background pixmap.
PangoAttrList* attributes = pango_attr_list_new();
PangoAttribute* text_color = pango_attr_foreground_new(0, 0, 0);
pango_attr_list_insert(attributes, text_color);
gtk_label_set_attributes(GTK_LABEL(message_), attributes);
pango_attr_list_unref(attributes);
gtk_widget_show_all(disconnect_window_);
// Extract the user name from the JID.
std::string client_jid = client_session_control_->client_jid();
base::string16 username =
base::UTF8ToUTF16(client_jid.substr(0, client_jid.find('/')));
gtk_label_set_text(
GTK_LABEL(message_),
l10n_util::GetStringFUTF8(IDS_MESSAGE_SHARED, username).c_str());
gtk_window_present(window);
}
void DisconnectWindowGtk::OnClicked(GtkButton* button) {
DCHECK(CalledOnValidThread());
if (client_session_control_.get())
client_session_control_->DisconnectSession(protocol::OK);
}
gboolean DisconnectWindowGtk::OnDelete(GtkWidget* window,
GdkEvent* event) {
DCHECK(CalledOnValidThread());
if (client_session_control_.get())
client_session_control_->DisconnectSession(protocol::OK);
return TRUE;
}
gboolean DisconnectWindowGtk::OnConfigure(GtkWidget* widget,
GdkEventConfigure* event) {
DCHECK(CalledOnValidThread());
// Only generate bitmaps if the size has actually changed.
if (event->width == current_width_ && event->height == current_height_)
return FALSE;
current_width_ = event->width;
current_height_ = event->height;
// Create the depth 1 pixmap for the window shape.
GdkPixmap* shape_mask =
gdk_pixmap_new(nullptr, current_width_, current_height_, 1);
cairo_t* cairo_context = gdk_cairo_create(shape_mask);
// Set the arc radius for the corners.
const int kCornerRadius = 6;
// Initialize the whole bitmap to be transparent.
cairo_set_source_rgba(cairo_context, 0, 0, 0, 0);
cairo_set_operator(cairo_context, CAIRO_OPERATOR_SOURCE);
cairo_paint(cairo_context);
// Paint an opaque round rect covering the whole area (leaving the extreme
// corners transparent).
cairo_set_source_rgba(cairo_context, 1, 1, 1, 1);
cairo_set_operator(cairo_context, CAIRO_OPERATOR_SOURCE);
AddRoundRectPath(cairo_context, current_width_, current_height_,
kCornerRadius);
cairo_fill(cairo_context);
cairo_destroy(cairo_context);
gdk_window_shape_combine_mask(widget->window, shape_mask, 0, 0);
g_object_unref(shape_mask);
// Create a full-color pixmap for the window background image.
GdkPixmap* background =
gdk_pixmap_new(nullptr, current_width_, current_height_, 24);
cairo_context = gdk_cairo_create(background);
// Paint the whole bitmap one color.
cairo_set_source_rgb(cairo_context, 0.91, 0.91, 0.91);
cairo_paint(cairo_context);
// Paint the round-rectangle edge.
cairo_set_source_rgb(cairo_context, 0.13, 0.69, 0.11);
cairo_set_line_width(cairo_context, 6);
AddRoundRectPath(cairo_context, current_width_, current_height_,
kCornerRadius);
cairo_stroke(cairo_context);
// Render the window-gripper. In order for a straight line to light up
// single pixels, Cairo requires the coordinates to have fractional
// components of 0.5 (so the "/ 2" is a deliberate integer division).
double gripper_top = current_height_ / 2 - 10.5;
double gripper_bottom = current_height_ / 2 + 10.5;
cairo_set_line_width(cairo_context, 1);
double x = 12.5;
cairo_set_source_rgb(cairo_context, 0.70, 0.70, 0.70);
cairo_move_to(cairo_context, x, gripper_top);
cairo_line_to(cairo_context, x, gripper_bottom);
cairo_stroke(cairo_context);
x += 3;
cairo_move_to(cairo_context, x, gripper_top);
cairo_line_to(cairo_context, x, gripper_bottom);
cairo_stroke(cairo_context);
x -= 2;
cairo_set_source_rgb(cairo_context, 0.97, 0.97, 0.97);
cairo_move_to(cairo_context, x, gripper_top);
cairo_line_to(cairo_context, x, gripper_bottom);
cairo_stroke(cairo_context);
x += 3;
cairo_move_to(cairo_context, x, gripper_top);
cairo_line_to(cairo_context, x, gripper_bottom);
cairo_stroke(cairo_context);
cairo_destroy(cairo_context);
gdk_window_set_back_pixmap(widget->window, background, FALSE);
g_object_unref(background);
gdk_window_invalidate_rect(widget->window, nullptr, TRUE);
return FALSE;
}
gboolean DisconnectWindowGtk::OnButtonPress(GtkWidget* widget,
GdkEventButton* event) {
DCHECK(CalledOnValidThread());
gtk_window_begin_move_drag(GTK_WINDOW(disconnect_window_),
event->button,
event->x_root,
event->y_root,
event->time);
return FALSE;
}
} // namespace
// static
scoped_ptr<HostWindow> HostWindow::CreateDisconnectWindow() {
return make_scoped_ptr(new DisconnectWindowGtk());
}
} // namespace remoting
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