/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 * Copyright (C) 1998-2002 Tor Lillqvist
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <glib/gprintf.h>

#include "gdkscreen.h"
#include "gdkproperty.h"
#include "gdkselection.h"
#include "gdkprivate-win32.h"
#include "gdkwin32.h"

GdkAtom
_gdk_win32_display_manager_atom_intern (GdkDisplayManager *manager,
					const gchar *atom_name,
					gint         only_if_exists)
{
  ATOM win32_atom;
  GdkAtom retval;
  static GHashTable *atom_hash = NULL;
  
  if (!atom_hash)
    atom_hash = g_hash_table_new (g_str_hash, g_str_equal);

  retval = g_hash_table_lookup (atom_hash, atom_name);
  if (!retval)
    {
      if (strcmp (atom_name, "PRIMARY") == 0)
	retval = GDK_SELECTION_PRIMARY;
      else if (strcmp (atom_name, "SECONDARY") == 0)
	retval = GDK_SELECTION_SECONDARY;
      else if (strcmp (atom_name, "CLIPBOARD") == 0)
	retval = GDK_SELECTION_CLIPBOARD;
      else if (strcmp (atom_name, "ATOM") == 0)
	retval = GDK_SELECTION_TYPE_ATOM;
      else if (strcmp (atom_name, "BITMAP") == 0)
	retval = GDK_SELECTION_TYPE_BITMAP;
      else if (strcmp (atom_name, "COLORMAP") == 0)
	retval = GDK_SELECTION_TYPE_COLORMAP;
      else if (strcmp (atom_name, "DRAWABLE") == 0)
	retval = GDK_SELECTION_TYPE_DRAWABLE;
      else if (strcmp (atom_name, "INTEGER") == 0)
	retval = GDK_SELECTION_TYPE_INTEGER;
      else if (strcmp (atom_name, "PIXMAP") == 0)
	retval = GDK_SELECTION_TYPE_PIXMAP;
      else if (strcmp (atom_name, "WINDOW") == 0)
	retval = GDK_SELECTION_TYPE_WINDOW;
      else if (strcmp (atom_name, "STRING") == 0)
	retval = GDK_SELECTION_TYPE_STRING;
      else
	{
	  win32_atom = GlobalAddAtom (atom_name);
	  retval = GUINT_TO_POINTER ((guint) win32_atom);
	}
      g_hash_table_insert (atom_hash, 
			   g_strdup (atom_name), 
			   retval);
    }

  return retval;
}

gchar *
_gdk_win32_display_manager_get_atom_name (GdkDisplayManager *manager, 
					  GdkAtom            atom)
{
  ATOM win32_atom;
  gchar name[256];

  if (GDK_NONE == atom) return g_strdup ("<none>");
  else if (GDK_SELECTION_PRIMARY == atom) return g_strdup ("PRIMARY");
  else if (GDK_SELECTION_SECONDARY == atom) return g_strdup ("SECONDARY");
  else if (GDK_SELECTION_CLIPBOARD == atom) return g_strdup ("CLIPBOARD");
  else if (GDK_SELECTION_TYPE_ATOM == atom) return g_strdup ("ATOM");
  else if (GDK_SELECTION_TYPE_BITMAP == atom) return g_strdup ("BITMAP");
  else if (GDK_SELECTION_TYPE_COLORMAP == atom) return g_strdup ("COLORMAP");
  else if (GDK_SELECTION_TYPE_DRAWABLE == atom) return g_strdup ("DRAWABLE");
  else if (GDK_SELECTION_TYPE_INTEGER == atom) return g_strdup ("INTEGER");
  else if (GDK_SELECTION_TYPE_PIXMAP == atom) return g_strdup ("PIXMAP");
  else if (GDK_SELECTION_TYPE_WINDOW == atom) return g_strdup ("WINDOW");
  else if (GDK_SELECTION_TYPE_STRING == atom) return g_strdup ("STRING");
  
  win32_atom = GPOINTER_TO_UINT (atom);
  
  if (win32_atom < 0xC000)
    return g_strdup_printf ("#%p", atom);
  else if (GlobalGetAtomName (win32_atom, name, sizeof (name)) == 0)
    return NULL;
  return g_strdup (name);
}

gint
_gdk_win32_window_get_property (GdkWindow   *window,
		  GdkAtom      property,
		  GdkAtom      type,
		  gulong       offset,
		  gulong       length,
		  gint         pdelete,
		  GdkAtom     *actual_property_type,
		  gint        *actual_format_type,
		  gint        *actual_length,
		  guchar     **data)
{
  g_return_val_if_fail (window != NULL, FALSE);
  g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE);

  if (GDK_WINDOW_DESTROYED (window))
    return FALSE;

  g_warning ("gdk_property_get: Not implemented");

  return FALSE;
}

void
_gdk_win32_window_change_property (GdkWindow    *window,
		     GdkAtom       property,
		     GdkAtom       type,
		     gint          format,
		     GdkPropMode   mode,
		     const guchar *data,
		     gint          nelements)
{
  HGLOBAL hdata;
  gint i, size;
  guchar *ucptr;
  wchar_t *wcptr, *p;
  glong wclen;
  GError *err = NULL;

  g_return_if_fail (window != NULL);
  g_return_if_fail (GDK_IS_WINDOW (window));

  if (GDK_WINDOW_DESTROYED (window))
    return;

  GDK_NOTE (DND, {
      gchar *prop_name = gdk_atom_name (property);
      gchar *type_name = gdk_atom_name (type);
      
      g_print ("gdk_property_change: %p %s %s %s %d*%d bits: %s\n",
	       GDK_WINDOW_HWND (window),
	       prop_name,
	       type_name,
	       (mode == GDK_PROP_MODE_REPLACE ? "REPLACE" :
		(mode == GDK_PROP_MODE_PREPEND ? "PREPEND" :
		 (mode == GDK_PROP_MODE_APPEND ? "APPEND" :
		  "???"))),
	       format, nelements,
	       _gdk_win32_data_to_string (data, MIN (10, format*nelements/8)));
      g_free (prop_name);
      g_free (type_name);
    });

  /* We should never come here for these types */
  g_return_if_fail (type != GDK_TARGET_STRING);
  g_return_if_fail (type != _text);
  g_return_if_fail (type != _compound_text);
  g_return_if_fail (type != _save_targets);

  if (property == _gdk_selection &&
      format == 8 &&
      mode == GDK_PROP_MODE_REPLACE)
    {
      if (type == _image_bmp && nelements < sizeof (BITMAPFILEHEADER))
        {
           g_warning ("Clipboard contains invalid bitmap data");
           return;
        }

      if (type == _utf8_string)
	{
	  if (!OpenClipboard (GDK_WINDOW_HWND (window)))
	    {
	      WIN32_API_FAILED ("OpenClipboard");
	      return;
	    }

	  wcptr = g_utf8_to_utf16 ((char *) data, nelements, NULL, &wclen, &err);
          if (err != NULL)
            {
              g_warning ("Failed to convert utf8: %s", err->message);
              g_clear_error (&err);
              return;
            }

	  wclen++;		/* Terminating 0 */
	  size = wclen * 2;
	  for (i = 0; i < wclen; i++)
	    if (wcptr[i] == '\n' && (i == 0 || wcptr[i - 1] != '\r'))
	      size += 2;
	  
	  if (!(hdata = GlobalAlloc (GMEM_MOVEABLE, size)))
	    {
	      WIN32_API_FAILED ("GlobalAlloc");
	      if (!CloseClipboard ())
		WIN32_API_FAILED ("CloseClipboard");
	      g_free (wcptr);
	      return;
	    }

	  ucptr = GlobalLock (hdata);

	  p = (wchar_t *) ucptr;
	  for (i = 0; i < wclen; i++)
	    {
	      if (wcptr[i] == '\n' && (i == 0 || wcptr[i - 1] != '\r'))
		*p++ = '\r';
	      *p++ = wcptr[i];
	    }
	  g_free (wcptr);

	  GlobalUnlock (hdata);
	  GDK_NOTE (DND, g_print ("... SetClipboardData(CF_UNICODETEXT,%p)\n",
				  hdata));
	  if (!SetClipboardData (CF_UNICODETEXT, hdata))
	    WIN32_API_FAILED ("SetClipboardData");
      
	  if (!CloseClipboard ())
	    WIN32_API_FAILED ("CloseClipboard");
	}
      else
        {
	  /* We use delayed rendering for everything else than
	   * text. We can't assign hdata to the clipboard here as type
	   * may be "image/png", "image/jpg", etc. In this case
	   * there's a further conversion afterwards.
	   */
	  GDK_NOTE (DND, g_print ("... delayed rendering\n"));
	  _delayed_rendering_data = NULL;
	  if (!(hdata = GlobalAlloc (GMEM_MOVEABLE, nelements > 0 ? nelements : 1)))
	    {
	      WIN32_API_FAILED ("GlobalAlloc");
	      return;
	    }
	  ucptr = GlobalLock (hdata);
	  memcpy (ucptr, data, nelements);
	  GlobalUnlock (hdata);
	  _delayed_rendering_data = hdata;
	}
    }
  else if (property == _gdk_ole2_dnd)
    {
      /* Will happen only if gdkdnd-win32.c has OLE2 dnd support compiled in */
      _gdk_win32_ole2_dnd_property_change (type, format, data, nelements);
    }
  else
    g_warning ("gdk_property_change: General case not implemented");
}

void
_gdk_win32_window_delete_property (GdkWindow *window,
				   GdkAtom    property)
{
  gchar *prop_name;

  g_return_if_fail (window != NULL);
  g_return_if_fail (GDK_IS_WINDOW (window));

  GDK_NOTE (DND, {
      prop_name = gdk_atom_name (property);

      g_print ("gdk_property_delete: %p %s\n",
	       GDK_WINDOW_HWND (window),
	       prop_name);
      g_free (prop_name);
    });

  if (property == _gdk_selection)
    _gdk_selection_property_delete (window);
  else if (property == _wm_transient_for)
    gdk_window_set_transient_for (window, _gdk_root);
  else
    {
      prop_name = gdk_atom_name (property);
      g_warning ("gdk_property_delete: General case (%s) not implemented",
		 prop_name);
      g_free (prop_name);
    }
}

/*
  For reference, from gdk/x11/gdksettings.c:

  "Net/DoubleClickTime\0"     "gtk-double-click-time\0"
  "Net/DoubleClickDistance\0" "gtk-double-click-distance\0"
  "Net/DndDragThreshold\0"    "gtk-dnd-drag-threshold\0"
  "Net/CursorBlink\0"         "gtk-cursor-blink\0"
  "Net/CursorBlinkTime\0"     "gtk-cursor-blink-time\0"
  "Net/ThemeName\0"           "gtk-theme-name\0"
  "Net/IconThemeName\0"       "gtk-icon-theme-name\0"
  "Gtk/ColorPalette\0"        "gtk-color-palette\0"
  "Gtk/FontName\0"            "gtk-font-name\0"
  "Gtk/KeyThemeName\0"        "gtk-key-theme-name\0"
  "Gtk/Modules\0"             "gtk-modules\0"
  "Gtk/CursorBlinkTimeout\0"  "gtk-cursor-blink-timeout\0"
  "Gtk/CursorThemeName\0"     "gtk-cursor-theme-name\0"
  "Gtk/CursorThemeSize\0"     "gtk-cursor-theme-size\0"
  "Gtk/ColorScheme\0"         "gtk-color-scheme\0"
  "Gtk/EnableAnimations\0"    "gtk-enable-animations\0"
  "Xft/Antialias\0"           "gtk-xft-antialias\0"
  "Xft/Hinting\0"             "gtk-xft-hinting\0"
  "Xft/HintStyle\0"           "gtk-xft-hintstyle\0"
  "Xft/RGBA\0"                "gtk-xft-rgba\0"
  "Xft/DPI\0"                 "gtk-xft-dpi\0"
  "Gtk/EnableAccels\0"        "gtk-enable-accels\0"
  "Gtk/ScrolledWindowPlacement\0" "gtk-scrolled-window-placement\0"
  "Gtk/IMModule\0"            "gtk-im-module\0"
  "Fontconfig/Timestamp\0"    "gtk-fontconfig-timestamp\0"
  "Net/SoundThemeName\0"      "gtk-sound-theme-name\0"
  "Net/EnableInputFeedbackSounds\0" "gtk-enable-input-feedback-sounds\0"
  "Net/EnableEventSounds\0"  "gtk-enable-event-sounds\0";

  More, from various places in gtk sources:

  gtk-entry-select-on-focus
  gtk-split-cursor

*/
gboolean
_gdk_win32_screen_get_setting (GdkScreen   *screen,
                        const gchar *name,
                        GValue      *value)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);

  /*
   * XXX : if these values get changed through the Windoze UI the
   *       respective gdk_events are not generated yet.
   */
  if (strcmp ("gtk-double-click-time", name) == 0)
    {
      gint i = GetDoubleClickTime ();
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : %d\n", name, i));
      g_value_set_int (value, i);
      return TRUE;
    }
  else if (strcmp ("gtk-double-click-distance", name) == 0)
    {
      gint i = MAX(GetSystemMetrics (SM_CXDOUBLECLK), GetSystemMetrics (SM_CYDOUBLECLK));
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : %d\n", name, i));
      g_value_set_int (value, i);
      return TRUE;
    }
  else if (strcmp ("gtk-dnd-drag-threshold", name) == 0)
    {
      gint i = MAX(GetSystemMetrics (SM_CXDRAG), GetSystemMetrics (SM_CYDRAG));
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : %d\n", name, i));
      g_value_set_int (value, i);
      return TRUE;
    }
  else if (strcmp ("gtk-split-cursor", name) == 0)
    {
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : FALSE\n", name));
      g_value_set_boolean (value, FALSE);
      return TRUE;
    }
  else if (strcmp ("gtk-alternative-button-order", name) == 0)
    {
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : TRUE\n", name));
      g_value_set_boolean (value, TRUE);
      return TRUE;
    }
  else if (strcmp ("gtk-alternative-sort-arrows", name) == 0)
    {
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : TRUE\n", name));
      g_value_set_boolean (value, TRUE);
      return TRUE;
    }
  else if (strcmp ("gtk-shell-shows-desktop", name) == 0)
    {
      GDK_NOTE(MISC, g_print("gdk_screen_get_setting(\"%s\") : TRUE\n", name));
      g_value_set_boolean (value, TRUE);
      return TRUE;
    }
  else if (strcmp ("gtk-font-name", name) == 0)
    {
      NONCLIENTMETRICS ncm;
      CPINFOEX cpinfoex_default, cpinfoex_curr_thread;
      OSVERSIONINFO info;
      BOOL result_default, result_curr_thread;

      info.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);

      /* TODO: Fallback to using Pango on Windows 8 and later,
       * as this method of handling gtk-font-name does not work
       * well there, where garbled text will be displayed for texts
       * that are not supported by the default menu font.  Look for
       * whether there is a better solution for this on Windows 8 and
       * later
       */
      if (!GetVersionEx (&info) ||
          info.dwMajorVersion > 6 ||
          info.dwMajorVersion == 6 && info.dwMinorVersion >= 2)
        return FALSE;

      /* check whether the system default ANSI codepage matches the
       * ANSI code page of the running thread.  If so, continue, otherwise
       * fall back to using Pango to handle gtk-font-name
       */
      result_default = GetCPInfoEx (CP_ACP, 0, &cpinfoex_default);
      result_curr_thread = GetCPInfoEx (CP_THREAD_ACP, 0, &cpinfoex_curr_thread);

      if (!result_default ||
          !result_curr_thread ||
          cpinfoex_default.CodePage != cpinfoex_curr_thread.CodePage)
        return FALSE;

      ncm.cbSize = sizeof(NONCLIENTMETRICS);
      if (SystemParametersInfo (SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, FALSE))
        {
          /* Pango finally uses GetDeviceCaps to scale, we use simple
	   * approximation here.
	   */
          int nHeight = (0 > ncm.lfMenuFont.lfHeight ? - 3 * ncm.lfMenuFont.lfHeight / 4 : 10);
          if (OUT_STRING_PRECIS == ncm.lfMenuFont.lfOutPrecision)
            GDK_NOTE(MISC, g_print("gdk_screen_get_setting(%s) : ignoring bitmap font '%s'\n", 
                                   name, ncm.lfMenuFont.lfFaceName));
          else if (ncm.lfMenuFont.lfFaceName && strlen(ncm.lfMenuFont.lfFaceName) > 0 &&
                   /* Avoid issues like those described in bug #135098 */
                   g_utf8_validate (ncm.lfMenuFont.lfFaceName, -1, NULL))
            {
              char *s = g_strdup_printf ("%s %d", ncm.lfMenuFont.lfFaceName, nHeight);
              GDK_NOTE(MISC, g_print("gdk_screen_get_setting(%s) : %s\n", name, s));
              g_value_set_string (value, s);

              g_free(s);
              return TRUE;
            }
        }
    }

  return FALSE;
}