/*

  toolbar-standalone-gtk.c: toolbar implementation with GTK+

  Copyright (c) 2003-2008 uim Project http://code.google.com/p/uim/

  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. Neither the name of authors nor the names of its contributors
     may be used to endorse or promote products derived from this software
     without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  SUCH DAMAGE.

*/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <locale.h>
#include <uim/gettext.h>
#include <gtk/gtk.h>
#include "uim/uim.h"

extern GtkWidget *uim_toolbar_standalone_new(void);

static gboolean toolbar_dragging = FALSE;
static gint window_drag_start_x = -1, window_drag_start_y = -1;
static gint pointer_drag_start_x = -1, pointer_drag_start_y = -1;

#if GLIB_CHECK_VERSION(2, 6, 0)

static void
parse_options(gint argc, gchar **argv)
{

}

#endif

static void
delete_event(GtkWidget *widget, gpointer data)
{
  gtk_main_quit();
}

static gboolean
button_press_event_cb(GtkWidget *widget, GdkEventButton *event, gpointer data)
{
  GdkCursor *cursor;
  GtkWidget *toolbar;
  gint height, width;

  switch (event->type) {
  case GDK_BUTTON_PRESS:
    cursor = gdk_cursor_new(GDK_FLEUR);
    gdk_pointer_grab(widget->window, FALSE,
		     GDK_BUTTON_RELEASE_MASK |
		     GDK_POINTER_MOTION_MASK,
		     NULL,
		     cursor, event->time);
    gdk_cursor_destroy(cursor);

    gtk_window_get_position(GTK_WINDOW(widget),
		    	    &window_drag_start_x,
			    &window_drag_start_y);
    pointer_drag_start_x = (gint)event->x_root;
    pointer_drag_start_y = (gint)event->y_root;
    toolbar_dragging = TRUE;
    break;
  case GDK_2BUTTON_PRESS:
    toolbar = GTK_WIDGET(data);
    if (GTK_WIDGET_VISIBLE(toolbar)) {
      gtk_window_get_size(GTK_WINDOW(widget), &width, &height);
      gtk_widget_hide(toolbar);
    } else {
      height = -1;
      gtk_widget_show(toolbar);
    }
    gtk_widget_set_size_request(widget, -1, height);
    break;
  default:
    break;
  }

  return FALSE;
}

static void
helper_win_set_position(GtkWidget *window, gint x, gint y)
{
  gint wx = x, wy = y;
  gint w, h, sc_w, sc_h;

  sc_w = gdk_screen_width();
  sc_h = gdk_screen_height();

  gdk_window_get_size(window->window, &w, &h);

  if (wx < 0)
    wx = 0;
  else if (wx > sc_w - w)
    wx = sc_w - w;
  if (wy < 0)
    wy = 0;
  else if (wy > sc_h - h)
    wy = sc_h -h;

  gtk_window_move(GTK_WINDOW(window), wx, wy);
}

static gboolean
motion_notify_event_cb(GtkWidget *widget, GdkEventMotion *event, gpointer data)
{
  if (toolbar_dragging) {
    gint wx, wy;
    gint w, h, sc_w, sc_h;

    sc_w = gdk_screen_width();
    sc_h = gdk_screen_height();

    gdk_window_get_size(widget->window, &w, &h);

    wx = window_drag_start_x + ((gint)event->x_root - pointer_drag_start_x);
    wy = window_drag_start_y + ((gint)event->y_root - pointer_drag_start_y);

    helper_win_set_position(widget, wx, wy);

    return TRUE;
  }

  return FALSE;
}

static gboolean
button_release_event_cb(GtkWidget *widget, GdkEventButton *event, gpointer data)
{
  if (!toolbar_dragging)
    return FALSE;

  gdk_pointer_ungrab(event->time);

  pointer_drag_start_x = -1;
  pointer_drag_start_y = -1;
  toolbar_dragging = FALSE;

  return FALSE;
}

static gboolean
handle_expose_event_cb(GtkWidget *widget, GdkEventExpose *event)
{
  GdkRectangle *rect = &event->area;

  gtk_paint_handle(widget->style, widget->window,
		   GTK_STATE_NORMAL, GTK_SHADOW_OUT,
		   rect, widget, "handlebox",
		   widget->allocation.x, widget->allocation.y,
		   widget->allocation.width, widget->allocation.height,
		   GTK_ORIENTATION_VERTICAL);

  return FALSE;
}

static void
size_allocate_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer user_data)
{
  gint x, y;

  if (GTK_WIDGET_MAPPED(widget)) {
    gtk_window_get_position(GTK_WINDOW(widget), &x, &y);
    helper_win_set_position(widget, x, y);
  }
}

static void
size_request_cb(GtkWidget *widget, GtkRequisition *req, gpointer data)
{
  if (GTK_WIDGET_MAPPED(widget)) {
    gint width, height;
    gtk_window_get_size(GTK_WINDOW(widget), &width, &height);

    if (width > req->width) {
      gtk_window_resize(GTK_WINDOW(widget), req->width, req->height);
    }
  }
}

int
main(int argc, char *argv[])
{
  GtkWidget *toolbar;
  GtkWidget *window;
  GtkWidget *hbox;
  GtkWidget *handle;
  GtkWidget *frame;

  setlocale(LC_ALL, "");
  bindtextdomain(PACKAGE, LOCALEDIR);
  textdomain(PACKAGE);
  bind_textdomain_codeset(PACKAGE, "UTF-8");

  uim_init();

  gtk_set_locale();

  gtk_init(&argc, &argv);

  window = gtk_window_new(GTK_WINDOW_POPUP);

  gtk_window_set_type_hint(GTK_WINDOW(window), GDK_WINDOW_TYPE_HINT_DOCK);

  gtk_window_set_skip_taskbar_hint(GTK_WINDOW(window), TRUE);
  gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
  gtk_window_stick(GTK_WINDOW(window));

  gtk_widget_add_events(window, GDK_BUTTON_PRESS_MASK);

  frame = gtk_frame_new(NULL);
  gtk_frame_set_shadow_type(GTK_FRAME(frame), GTK_SHADOW_OUT);
  gtk_container_add(GTK_CONTAINER(window), frame);

  hbox = gtk_hbox_new(FALSE, 0);
  gtk_container_add(GTK_CONTAINER(frame), hbox);

  handle = gtk_drawing_area_new();
  gtk_widget_set_size_request(handle, 8, -1);
  gtk_box_pack_start(GTK_BOX(hbox), handle, FALSE, FALSE, 0);

  toolbar = (GtkWidget*)uim_toolbar_standalone_new();
  gtk_box_pack_start(GTK_BOX(hbox), toolbar, FALSE, FALSE, 0);

  g_signal_connect(G_OBJECT(handle), "expose-event",
		   G_CALLBACK(handle_expose_event_cb), NULL);

  g_signal_connect(G_OBJECT(window), "delete_event",
		   G_CALLBACK(delete_event), NULL);
  g_signal_connect(G_OBJECT(window), "button-press-event",
		   G_CALLBACK(button_press_event_cb), toolbar);
  g_signal_connect(G_OBJECT(window), "button-release-event",
		   G_CALLBACK(button_release_event_cb), NULL);
  g_signal_connect(G_OBJECT(window), "motion-notify-event",
		   G_CALLBACK(motion_notify_event_cb), NULL);
  g_signal_connect(G_OBJECT(window), "size-allocate",
		   G_CALLBACK(size_allocate_cb), NULL);
  g_signal_connect(G_OBJECT(window), "size-request",
		   G_CALLBACK(size_request_cb), NULL);

  gtk_widget_show_all(GTK_WIDGET(window));

  if (argc > 1) {
    if (!gtk_window_parse_geometry(GTK_WINDOW(window), argv[1])) {

#if GLIB_CHECK_VERSION(2, 6, 0)
      parse_options(argc, argv);
#else
      g_warning(_("Unable to parse the geometry string '%s'"), argv[1]);
#endif
    }
  } else {
    gint x, y, w, h, sc_w, sc_h;
    gint panel_height = 32; /* FIXME! */

    gtk_window_get_size(GTK_WINDOW(window), &w, &h);
    sc_w = gdk_screen_width();
    sc_h = gdk_screen_height();

    x = sc_w - w;
    y = sc_h - h - panel_height; /* FIXME! */
    helper_win_set_position(window, x, y);
  }

  gtk_main();

  uim_quit();

  return 0;
}