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gtk/gdk/win32/gdkselection-win32.c
Tor Lillqvist eb21a7df29 Work on OLE2-based generic DND 
Intermediate commit of work in progress on integrating the old code
for OLE2-based generic drag and drop from Arhaeopteryx Software, from
a long time ago in the GTK+ 1.3 timeframe. Does still not work and is
as before not compiled in unless OLE2_DND is defined in
gdkdnd-win32.c. (Thus, for inter-process DND, still only WM_DROPFILES
style dropping of files on GTK+ apps works.)

Related slight refactoring of other code that shouldn't change how it
works. Add more global variables for run-time constants (once
initialized) representing well-known GdkAtoms and registered Windows
clipboard formats, as they with the generic DND code will be needed in
several source files. Some improved debugging output.
2009-12-16 13:10:21 +02:00

1296 lines
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/* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* 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 "gdkproperty.h"
#include "gdkselection.h"
#include "gdkdisplay.h"
#include "gdkprivate-win32.h"
/* We emulate the GDK_SELECTION window properties of windows (as used
* in the X11 backend) by using a hash table from window handles to
* GdkSelProp structs.
*/
typedef struct {
guchar *data;
gsize length;
gint format;
GdkAtom type;
} GdkSelProp;
static GHashTable *sel_prop_table = NULL;
static GdkSelProp *dropfiles_prop = NULL;
/* We store the owner of each selection in this table. Obviously, this only
* is valid intra-app, and in fact it is necessary for the intra-app DND to work.
*/
static GHashTable *sel_owner_table = NULL;
/* GdkAtoms for well-known image formats */
static GdkAtom *known_pixbuf_formats;
static int n_known_pixbuf_formats;
/* GdkAtoms for well-known text formats */
static GdkAtom text_plain;
static GdkAtom text_plain_charset_utf_8;
static GdkAtom text_plain_charset_CP1252;
void
_gdk_win32_selection_init (void)
{
GSList *pixbuf_formats;
GSList *rover;
sel_prop_table = g_hash_table_new (NULL, NULL);
sel_owner_table = g_hash_table_new (NULL, NULL);
_format_atom_table = g_hash_table_new (NULL, NULL);
pixbuf_formats = gdk_pixbuf_get_formats ();
n_known_pixbuf_formats = 0;
for (rover = pixbuf_formats; rover != NULL; rover = rover->next)
{
gchar **mime_types =
gdk_pixbuf_format_get_mime_types ((GdkPixbufFormat *) rover->data);
gchar **mime_type;
for (mime_type = mime_types; *mime_type != NULL; mime_type++)
n_known_pixbuf_formats++;
}
known_pixbuf_formats = g_new (GdkAtom, n_known_pixbuf_formats);
n_known_pixbuf_formats = 0;
for (rover = pixbuf_formats; rover != NULL; rover = rover->next)
{
gchar **mime_types =
gdk_pixbuf_format_get_mime_types ((GdkPixbufFormat *) rover->data);
gchar **mime_type;
for (mime_type = mime_types; *mime_type != NULL; mime_type++)
known_pixbuf_formats[n_known_pixbuf_formats++] = gdk_atom_intern (*mime_type, FALSE);
}
g_slist_free (pixbuf_formats);
text_plain = gdk_atom_intern ("text/plain", FALSE);
text_plain_charset_utf_8= gdk_atom_intern ("text/plain;charset=utf-8", FALSE);
text_plain_charset_CP1252 = gdk_atom_intern ("text/plain;charset=CP1252", FALSE);
g_hash_table_replace (_format_atom_table,
GINT_TO_POINTER (_cf_png),
_image_png);
g_hash_table_replace (_format_atom_table,
GINT_TO_POINTER (CF_DIB),
_image_bmp);
}
/* The specifications for COMPOUND_TEXT and STRING specify that C0 and
* C1 are not allowed except for \n and \t, however the X conversions
* routines for COMPOUND_TEXT only enforce this in one direction,
* causing cut-and-paste of \r and \r\n separated text to fail.
* This routine strips out all non-allowed C0 and C1 characters
* from the input string and also canonicalizes \r, and \r\n to \n
*/
static gchar *
sanitize_utf8 (const gchar *src,
gint length)
{
GString *result = g_string_sized_new (length + 1);
const gchar *p = src;
const gchar *endp = src + length;
while (p < endp)
{
if (*p == '\r')
{
p++;
if (*p == '\n')
p++;
g_string_append_c (result, '\n');
}
else
{
gunichar ch = g_utf8_get_char (p);
char buf[7];
gint buflen;
if (!((ch < 0x20 && ch != '\t' && ch != '\n') || (ch >= 0x7f && ch < 0xa0)))
{
buflen = g_unichar_to_utf8 (ch, buf);
g_string_append_len (result, buf, buflen);
}
p = g_utf8_next_char (p);
}
}
g_string_append_c (result, '\0');
return g_string_free (result, FALSE);
}
static gchar *
_gdk_utf8_to_string_target_internal (const gchar *str,
gint length)
{
GError *error = NULL;
gchar *tmp_str = sanitize_utf8 (str, length);
gchar *result = g_convert_with_fallback (tmp_str, -1,
"ISO-8859-1", "UTF-8",
NULL, NULL, NULL, &error);
if (!result)
{
g_warning ("Error converting from UTF-8 to STRING: %s",
error->message);
g_error_free (error);
}
g_free (tmp_str);
return result;
}
static void
selection_property_store (GdkWindow *owner,
GdkAtom type,
gint format,
guchar *data,
gint length)
{
GdkSelProp *prop;
g_return_if_fail (type != GDK_TARGET_STRING);
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (owner));
if (prop != NULL)
{
g_free (prop->data);
g_free (prop);
g_hash_table_remove (sel_prop_table, GDK_WINDOW_HWND (owner));
}
prop = g_new (GdkSelProp, 1);
prop->data = data;
prop->length = length;
prop->format = format;
prop->type = type;
g_hash_table_insert (sel_prop_table, GDK_WINDOW_HWND (owner), prop);
}
void
_gdk_dropfiles_store (gchar *data)
{
if (data != NULL)
{
g_assert (dropfiles_prop == NULL);
dropfiles_prop = g_new (GdkSelProp, 1);
dropfiles_prop->data = (guchar *) data;
dropfiles_prop->length = strlen (data) + 1;
dropfiles_prop->format = 8;
dropfiles_prop->type = _text_uri_list;
}
else
{
if (dropfiles_prop != NULL)
{
g_free (dropfiles_prop->data);
g_free (dropfiles_prop);
}
dropfiles_prop = NULL;
}
}
static gchar *
get_mapped_gdk_atom_name (GdkAtom gdk_target)
{
if (gdk_target == _image_png)
return g_strdup ("PNG");
if (gdk_target == _image_jpeg)
return g_strdup ("JFIF");
if (gdk_target == _image_gif)
return g_strdup ("GIF");
return gdk_atom_name (gdk_target);
}
gboolean
gdk_selection_owner_set_for_display (GdkDisplay *display,
GdkWindow *owner,
GdkAtom selection,
guint32 time,
gboolean send_event)
{
HWND hwnd;
GdkEvent tmp_event;
g_return_val_if_fail (display == _gdk_display, FALSE);
g_return_val_if_fail (selection != GDK_NONE, FALSE);
GDK_NOTE (DND, {
gchar *sel_name = gdk_atom_name (selection);
g_print ("gdk_selection_owner_set_for_display: %p %s\n",
(owner ? GDK_WINDOW_HWND (owner) : NULL),
sel_name);
g_free (sel_name);
});
if (selection != GDK_SELECTION_CLIPBOARD)
{
if (owner != NULL)
g_hash_table_insert (sel_owner_table, selection, GDK_WINDOW_HWND (owner));
else
g_hash_table_remove (sel_owner_table, selection);
return TRUE;
}
/* Rest of this function handles the CLIPBOARD selection */
if (owner != NULL)
{
if (GDK_WINDOW_DESTROYED (owner))
return FALSE;
hwnd = GDK_WINDOW_HWND (owner);
}
else
hwnd = NULL;
if (!API_CALL (OpenClipboard, (hwnd)))
return FALSE;
_ignore_destroy_clipboard = TRUE;
GDK_NOTE (DND, g_print ("... EmptyClipboard()\n"));
if (!API_CALL (EmptyClipboard, ()))
{
_ignore_destroy_clipboard = FALSE;
API_CALL (CloseClipboard, ());
return FALSE;
}
_ignore_destroy_clipboard = FALSE;
if (!API_CALL (CloseClipboard, ()))
return FALSE;
if (owner != NULL)
{
/* Send ourselves a selection request message so that
* gdk_property_change will be called to store the clipboard
* data.
*/
GDK_NOTE (DND, g_print ("... sending GDK_SELECTION_REQUEST to ourselves\n"));
tmp_event.selection.type = GDK_SELECTION_REQUEST;
tmp_event.selection.window = owner;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = selection;
tmp_event.selection.target = _utf8_string;
tmp_event.selection.property = _gdk_selection;
tmp_event.selection.requestor = hwnd;
tmp_event.selection.time = time;
gdk_event_put (&tmp_event);
}
return TRUE;
}
GdkWindow*
gdk_selection_owner_get_for_display (GdkDisplay *display,
GdkAtom selection)
{
GdkWindow *window;
g_return_val_if_fail (display == _gdk_display, NULL);
g_return_val_if_fail (selection != GDK_NONE, NULL);
if (selection == GDK_SELECTION_CLIPBOARD)
{
HWND owner = GetClipboardOwner ();
if (owner == NULL)
return NULL;
return gdk_win32_handle_table_lookup ((GdkNativeWindow) owner);
}
window = gdk_window_lookup ((GdkNativeWindow) g_hash_table_lookup (sel_owner_table, selection));
GDK_NOTE (DND, {
gchar *sel_name = gdk_atom_name (selection);
g_print ("gdk_selection_owner_get: %s = %p\n",
sel_name,
(window ? GDK_WINDOW_HWND (window) : NULL));
g_free (sel_name);
});
return window;
}
static void
generate_selection_notify (GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time)
{
GdkEvent tmp_event;
tmp_event.selection.type = GDK_SELECTION_NOTIFY;
tmp_event.selection.window = requestor;
tmp_event.selection.send_event = FALSE;
tmp_event.selection.selection = selection;
tmp_event.selection.target = target;
tmp_event.selection.property = property;
tmp_event.selection.requestor = 0;
tmp_event.selection.time = time;
gdk_event_put (&tmp_event);
}
void
gdk_selection_convert (GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
guint32 time)
{
HGLOBAL hdata;
GdkAtom property = _gdk_selection;
g_return_if_fail (selection != GDK_NONE);
g_return_if_fail (requestor != NULL);
if (GDK_WINDOW_DESTROYED (requestor))
return;
GDK_NOTE (DND, {
gchar *sel_name = gdk_atom_name (selection);
gchar *tgt_name = gdk_atom_name (target);
g_print ("gdk_selection_convert: %p %s %s\n",
GDK_WINDOW_HWND (requestor),
sel_name, tgt_name);
g_free (sel_name);
g_free (tgt_name);
});
if (selection == GDK_SELECTION_CLIPBOARD && target == _targets)
{
gint ntargets, fmt;
GdkAtom *targets;
gboolean has_text = FALSE;
gboolean has_png = FALSE;
gboolean has_bmp = FALSE;
if (!API_CALL (OpenClipboard, (GDK_WINDOW_HWND (requestor))))
return;
targets = g_new (GdkAtom, CountClipboardFormats ());
ntargets = 0;
for (fmt = 0; 0 != (fmt = EnumClipboardFormats (fmt)); )
{
if (fmt == _cf_png)
{
targets[ntargets++] = _image_png;
has_png = TRUE;
}
}
for (fmt = 0; 0 != (fmt = EnumClipboardFormats (fmt)); )
{
gchar sFormat[80];
if (fmt == CF_UNICODETEXT || fmt == CF_TEXT)
{
/* Advertise text to GDK always as UTF8_STRING */
if (!has_text)
targets[ntargets++] = _utf8_string;
has_text = TRUE;
}
else if (fmt == _cf_png)
{
/* Already handled above */
}
else if (fmt == CF_DIB ||
fmt == CF_DIBV5)
{
/* Don't bother telling that a bitmap is present if there is
* also PNG, which is much more reliable in transferring
* transparency.
*/
if (!has_bmp && !has_png)
targets[ntargets++] = _image_bmp;
has_bmp = TRUE;
}
else if (fmt == _cf_jfif)
{
/* Ditto for JPEG */
if (!has_png)
targets[ntargets++] = _image_jpeg;
}
else if (fmt == _cf_gif)
{
/* Ditto for GIF.
*/
if (!has_png)
targets[ntargets++] = _image_gif;
}
else if (GetClipboardFormatName (fmt, sFormat, 80) > 0)
{
if (strcmp (sFormat, "image/bmp") == 0 ||
strcmp (sFormat, "image/x-bmp") == 0 ||
strcmp (sFormat, "image/x-MS-bmp") == 0 ||
strcmp (sFormat, "image/x-icon") == 0 ||
strcmp (sFormat, "image/x-ico") == 0 ||
strcmp (sFormat, "image/x-win-bitmap") == 0)
{
/* Ignore these (from older GTK+ versions
* presumably), as the same image in the CF_DIB
* format will also be on the clipboard anyway.
*/
}
else
targets[ntargets++] = gdk_atom_intern (sFormat, FALSE);
}
}
GDK_NOTE (DND, {
int i;
g_print ("... ");
for (i = 0; i < ntargets; i++)
{
gchar *atom_name = gdk_atom_name (targets[i]);
g_print ("%s", atom_name);
g_free (atom_name);
if (i < ntargets - 1)
g_print (", ");
}
g_print ("\n");
});
if (ntargets > 0)
selection_property_store (requestor, GDK_SELECTION_TYPE_ATOM,
32, (guchar *) targets,
ntargets * sizeof (GdkAtom));
else
property = GDK_NONE;
API_CALL (CloseClipboard, ());
}
else if (selection == GDK_SELECTION_CLIPBOARD && target == _utf8_string)
{
/* Converting the CLIPBOARD selection means he wants the
* contents of the clipboard. Get the clipboard data, and store
* it for later.
*/
if (!API_CALL (OpenClipboard, (GDK_WINDOW_HWND (requestor))))
return;
if ((hdata = GetClipboardData (CF_UNICODETEXT)) != NULL)
{
wchar_t *ptr, *wcs, *p, *q;
guchar *data;
glong length, wclen;
if ((ptr = GlobalLock (hdata)) != NULL)
{
length = GlobalSize (hdata);
GDK_NOTE (DND, g_print ("... CF_UNICODETEXT: %ld bytes\n",
length));
/* Strip out \r */
wcs = g_new (wchar_t, length / 2 + 1);
p = ptr;
q = wcs;
wclen = 0;
while (p < ptr + length / 2)
{
if (*p != '\r')
{
*q++ = *p;
wclen++;
}
p++;
}
data = g_utf16_to_utf8 (wcs, wclen, NULL, NULL, NULL);
g_free (wcs);
if (data)
selection_property_store (requestor, _utf8_string, 8,
data, strlen (data) + 1);
GlobalUnlock (hdata);
}
}
else
property = GDK_NONE;
API_CALL (CloseClipboard, ());
}
else if (selection == GDK_SELECTION_CLIPBOARD && target == _image_bmp)
{
if (!API_CALL (OpenClipboard, (GDK_WINDOW_HWND (requestor))))
return;
if ((hdata = GetClipboardData (CF_DIB)) != NULL)
{
BITMAPINFOHEADER *bi;
if ((bi = GlobalLock (hdata)) != NULL)
{
/* Need to add a BMP file header so gdk-pixbuf can load
* it.
*
* If the data is from Mozilla Firefox or IE7, and
* starts with an "oldfashioned" BITMAPINFOHEADER,
* i.e. with biSize==40, and biCompression == BI_RGB and
* biBitCount==32, we assume that the "extra" byte in
* each pixel in fact is alpha.
*
* The gdk-pixbuf bmp loader doesn't trust 32-bit BI_RGB
* nitmaps to in fact have alpha, so we have to convince
* it by changint the bitmap header to a version 5
* BI_BITFIELDS one with explicit alpha mask indicated.
*
* The RGB bytes that are in bitmaps on the clipboard
* originating from Firefox or IE7 seem to be
* premultiplied with alpha. The gdk-pixbuf bmp loader
* of course doesn't expect that, so we have to undo the
* premultiplication before feeding the bitmap to the
* bmp loader.
*
* Note that for some reason the bmp loader used to want
* the alpha bytes in its input to actually be
* 255-alpha, but here we assume that this has been
* fixed before this is committed.
*/
BITMAPFILEHEADER *bf;
gpointer data;
gint data_length = GlobalSize (hdata);
gint new_length;
gboolean make_dibv5 = FALSE;
GDK_NOTE (DND, g_print ("... CF_DIB: %d bytes\n", data_length));
if (bi->biSize == sizeof (BITMAPINFOHEADER) &&
bi->biPlanes == 1 &&
bi->biBitCount == 32 &&
bi->biCompression == BI_RGB &&
#if 0
/* Maybe check explicitly for Mozilla or IE7?
*
* If the clipboard format
* application/x-moz-nativeimage is present, that is
* a reliable indicator that the data is offered by
* Mozilla one would think. For IE7,
* UniformResourceLocatorW is presumably not that
* uniqie, so probably need to do some
* GetClipboardOwner(), GetWindowThreadProcessId(),
* OpenProcess(), GetModuleFileNameEx() dance to
* check?
*/
(IsClipboardFormatAvailable
(RegisterClipboardFormat ("application/x-moz-nativeimage")) ||
IsClipboardFormatAvailable
(RegisterClipboardFormat ("UniformResourceLocatorW"))) &&
#endif
TRUE)
{
/* We turn the BITMAPINFOHEADER into a
* BITMAPV5HEADER before feeding it to gdk-pixbuf.
*/
new_length = (data_length +
sizeof (BITMAPFILEHEADER) +
(sizeof (BITMAPV5HEADER) - sizeof (BITMAPINFOHEADER)));
make_dibv5 = TRUE;
}
else
{
new_length = data_length + sizeof (BITMAPFILEHEADER);
}
data = g_try_malloc (new_length);
if (data)
{
bf = (BITMAPFILEHEADER *)data;
bf->bfType = 0x4d42; /* "BM" */
bf->bfSize = new_length;
bf->bfReserved1 = 0;
bf->bfReserved2 = 0;
if (make_dibv5)
{
BITMAPV5HEADER *bV5 = (BITMAPV5HEADER *) ((char *) data + sizeof (BITMAPFILEHEADER));
guchar *p;
int i;
bV5->bV5Size = sizeof (BITMAPV5HEADER);
bV5->bV5Width = bi->biWidth;
bV5->bV5Height = bi->biHeight;
bV5->bV5Planes = 1;
bV5->bV5BitCount = 32;
bV5->bV5Compression = BI_BITFIELDS;
bV5->bV5SizeImage = 4 * bV5->bV5Width * ABS (bV5->bV5Height);
bV5->bV5XPelsPerMeter = bi->biXPelsPerMeter;
bV5->bV5YPelsPerMeter = bi->biYPelsPerMeter;
bV5->bV5ClrUsed = 0;
bV5->bV5ClrImportant = 0;
/* Now the added mask fields */
bV5->bV5RedMask = 0x00ff0000;
bV5->bV5GreenMask = 0x0000ff00;
bV5->bV5BlueMask = 0x000000ff;
bV5->bV5AlphaMask = 0xff000000;
((char *) &bV5->bV5CSType)[3] = 's';
((char *) &bV5->bV5CSType)[2] = 'R';
((char *) &bV5->bV5CSType)[1] = 'G';
((char *) &bV5->bV5CSType)[0] = 'B';
/* Ignore colorspace and profile fields */
bV5->bV5Intent = LCS_GM_GRAPHICS;
bV5->bV5Reserved = 0;
bf->bfOffBits = (sizeof (BITMAPFILEHEADER) +
bV5->bV5Size);
p = ((guchar *) data) + sizeof (BITMAPFILEHEADER) + sizeof (BITMAPV5HEADER);
memcpy (p, ((char *) bi) + bi->biSize,
data_length - sizeof (BITMAPINFOHEADER));
for (i = 0; i < bV5->bV5SizeImage/4; i++)
{
if (p[3] != 0)
{
gdouble inverse_alpha = 255./p[3];
p[0] = p[0] * inverse_alpha + 0.5;
p[1] = p[1] * inverse_alpha + 0.5;
p[2] = p[2] * inverse_alpha + 0.5;
}
p += 4;
}
}
else
{
bf->bfOffBits = (sizeof (BITMAPFILEHEADER) +
bi->biSize +
bi->biClrUsed * sizeof (RGBQUAD));
memcpy ((char *) data + sizeof (BITMAPFILEHEADER),
bi,
data_length);
}
selection_property_store (requestor, _image_bmp, 8,
data, new_length);
}
GlobalUnlock (hdata);
}
}
API_CALL (CloseClipboard, ());
}
else if (selection == GDK_SELECTION_CLIPBOARD)
{
gchar *mapped_target_name;
UINT fmt = 0;
if (!API_CALL (OpenClipboard, (GDK_WINDOW_HWND (requestor))))
return;
mapped_target_name = get_mapped_gdk_atom_name (target);
/* Check if it's available. We could simply call
* GetClipboardData (RegisterClipboardFormat (targetname)), but
* the global custom format ID space is limited,
* (0xC000~0xFFFF), and we better not waste an format ID if we
* are just a requestor.
*/
for ( ; 0 != (fmt = EnumClipboardFormats (fmt)); )
{
char sFormat[80];
if (GetClipboardFormatName (fmt, sFormat, 80) > 0 &&
strcmp (sFormat, mapped_target_name) == 0)
{
if ((hdata = GetClipboardData (fmt)) != NULL)
{
/* Simply get it without conversion */
guchar *ptr;
gint length;
if ((ptr = GlobalLock (hdata)) != NULL)
{
length = GlobalSize (hdata);
GDK_NOTE (DND, g_print ("... %s: %d bytes\n", mapped_target_name, length));
selection_property_store (requestor, target, 8,
g_memdup (ptr, length), length);
GlobalUnlock (hdata);
break;
}
}
}
}
g_free (mapped_target_name);
API_CALL (CloseClipboard, ());
}
else if (selection == _gdk_win32_dropfiles)
{
/* This means he wants the names of the dropped files.
* gdk_dropfiles_filter already has stored the text/uri-list
* data temporarily in dropfiles_prop.
*/
if (dropfiles_prop != NULL)
{
selection_property_store
(requestor, dropfiles_prop->type, dropfiles_prop->format,
dropfiles_prop->data, dropfiles_prop->length);
g_free (dropfiles_prop);
dropfiles_prop = NULL;
}
}
else
property = GDK_NONE;
/* Generate a selection notify message so that we actually fetch the
* data (if property == _gdk_selection) or indicating failure (if
* property == GDK_NONE).
*/
generate_selection_notify (requestor, selection, target, property, time);
}
gint
gdk_selection_property_get (GdkWindow *requestor,
guchar **data,
GdkAtom *ret_type,
gint *ret_format)
{
GdkSelProp *prop;
g_return_val_if_fail (requestor != NULL, 0);
g_return_val_if_fail (GDK_IS_WINDOW (requestor), 0);
if (GDK_WINDOW_DESTROYED (requestor))
return 0;
GDK_NOTE (DND, g_print ("gdk_selection_property_get: %p",
GDK_WINDOW_HWND (requestor)));
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (requestor));
if (prop == NULL)
{
GDK_NOTE (DND, g_print (" (nothing)\n"));
*data = NULL;
return 0;
}
*data = g_malloc (prop->length + 1);
(*data)[prop->length] = '\0';
if (prop->length > 0)
memmove (*data, prop->data, prop->length);
GDK_NOTE (DND, {
gchar *type_name = gdk_atom_name (prop->type);
g_print (" %s format:%d length:%d\n", type_name, prop->format, prop->length);
g_free (type_name);
});
if (ret_type)
*ret_type = prop->type;
if (ret_format)
*ret_format = prop->format;
return prop->length;
}
void
_gdk_selection_property_delete (GdkWindow *window)
{
GDK_NOTE (DND, g_print ("_gdk_selection_property_delete: %p (no-op)\n",
GDK_WINDOW_HWND (window)));
#if 0
prop = g_hash_table_lookup (sel_prop_table, GDK_WINDOW_HWND (window));
if (prop != NULL)
{
g_free (prop->data);
g_free (prop);
g_hash_table_remove (sel_prop_table, GDK_WINDOW_HWND (window));
}
#endif
}
void
gdk_selection_send_notify_for_display (GdkDisplay *display,
GdkNativeWindow requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time)
{
g_return_if_fail (display == _gdk_display);
GDK_NOTE (DND, {
gchar *sel_name = gdk_atom_name (selection);
gchar *tgt_name = gdk_atom_name (target);
gchar *prop_name = gdk_atom_name (property);
g_print ("gdk_selection_send_notify_for_display: %p %s %s %s (no-op)\n",
requestor, sel_name, tgt_name, prop_name);
g_free (sel_name);
g_free (tgt_name);
g_free (prop_name);
});
}
/* It's hard to say whether implementing this actually is of any use
* on the Win32 platform? gtk calls only
* gdk_text_property_to_utf8_list_for_display().
*/
gint
gdk_text_property_to_text_list_for_display (GdkDisplay *display,
GdkAtom encoding,
gint format,
const guchar *text,
gint length,
gchar ***list)
{
gchar *result;
const gchar *charset;
gchar *source_charset;
g_return_val_if_fail (display == _gdk_display, 0);
GDK_NOTE (DND, {
gchar *enc_name = gdk_atom_name (encoding);
g_print ("gdk_text_property_to_text_list_for_display: %s %d %.20s %d\n",
enc_name, format, text, length);
g_free (enc_name);
});
if (!list)
return 0;
if (encoding == GDK_TARGET_STRING)
source_charset = g_strdup ("ISO-8859-1");
else if (encoding == _utf8_string)
source_charset = g_strdup ("UTF-8");
else
source_charset = gdk_atom_name (encoding);
g_get_charset (&charset);
result = g_convert (text, length, charset, source_charset,
NULL, NULL, NULL);
g_free (source_charset);
if (!result)
return 0;
*list = g_new (gchar *, 1);
**list = result;
return 1;
}
void
gdk_free_text_list (gchar **list)
{
g_return_if_fail (list != NULL);
g_free (*list);
g_free (list);
}
static gint
make_list (const gchar *text,
gint length,
gboolean latin1,
gchar ***list)
{
GSList *strings = NULL;
gint n_strings = 0;
gint i;
const gchar *p = text;
const gchar *q;
GSList *tmp_list;
GError *error = NULL;
while (p < text + length)
{
gchar *str;
q = p;
while (*q && q < text + length)
q++;
if (latin1)
{
str = g_convert (p, q - p,
"UTF-8", "ISO-8859-1",
NULL, NULL, &error);
if (!str)
{
g_warning ("Error converting selection from STRING: %s",
error->message);
g_error_free (error);
}
}
else
str = g_strndup (p, q - p);
if (str)
{
strings = g_slist_prepend (strings, str);
n_strings++;
}
p = q + 1;
}
if (list)
*list = g_new (gchar *, n_strings + 1);
(*list)[n_strings] = NULL;
i = n_strings;
tmp_list = strings;
while (tmp_list)
{
if (list)
(*list)[--i] = tmp_list->data;
else
g_free (tmp_list->data);
tmp_list = tmp_list->next;
}
g_slist_free (strings);
return n_strings;
}
gint
gdk_text_property_to_utf8_list_for_display (GdkDisplay *display,
GdkAtom encoding,
gint format,
const guchar *text,
gint length,
gchar ***list)
{
g_return_val_if_fail (text != NULL, 0);
g_return_val_if_fail (length >= 0, 0);
g_return_val_if_fail (display == _gdk_display, 0);
if (encoding == GDK_TARGET_STRING)
{
return make_list ((gchar *)text, length, TRUE, list);
}
else if (encoding == _utf8_string)
{
return make_list ((gchar *)text, length, FALSE, list);
}
else
{
gchar *enc_name = gdk_atom_name (encoding);
g_warning ("gdk_text_property_to_utf8_list_for_display: encoding %s not handled\n", enc_name);
g_free (enc_name);
if (list)
*list = NULL;
return 0;
}
}
gint
gdk_string_to_compound_text_for_display (GdkDisplay *display,
const gchar *str,
GdkAtom *encoding,
gint *format,
guchar **ctext,
gint *length)
{
g_return_val_if_fail (str != NULL, 0);
g_return_val_if_fail (length >= 0, 0);
g_return_val_if_fail (display == _gdk_display, 0);
GDK_NOTE (DND, g_print ("gdk_string_to_compound_text_for_display: %.20s\n", str));
/* Always fail on Win32. No COMPOUND_TEXT support. */
if (encoding)
*encoding = GDK_NONE;
if (format)
*format = 0;
if (ctext)
*ctext = NULL;
if (length)
*length = 0;
return -1;
}
gchar *
gdk_utf8_to_string_target (const gchar *str)
{
return _gdk_utf8_to_string_target_internal (str, strlen (str));
}
gboolean
gdk_utf8_to_compound_text_for_display (GdkDisplay *display,
const gchar *str,
GdkAtom *encoding,
gint *format,
guchar **ctext,
gint *length)
{
g_return_val_if_fail (str != NULL, FALSE);
g_return_val_if_fail (display == _gdk_display, FALSE);
GDK_NOTE (DND, g_print ("gdk_utf8_to_compound_text_for_display: %.20s\n", str));
/* Always fail on Win32. No COMPOUND_TEXT support. */
if (encoding)
*encoding = GDK_NONE;
if (format)
*format = 0;
if (ctext)
*ctext = NULL;
if (length)
*length = 0;
return FALSE;
}
void
gdk_free_compound_text (guchar *ctext)
{
/* As we never generate anything claimed to be COMPOUND_TEXT, this
* should never be called. Or if it is called, ctext should be the
* NULL returned for conversions to COMPOUND_TEXT above.
*/
g_return_if_fail (ctext == NULL);
}
/* This function is called from gtk_selection_add_target() and
* gtk_selection_add_targets() in gtkselection.c. It is this function
* that takes care of setting those clipboard formats for which we use
* delayed rendering. Formats copied directly to the clipboard are
* handled in gdk_property_change() in gdkproperty-win32.c.
*/
void
gdk_win32_selection_add_targets (GdkWindow *owner,
GdkAtom selection,
gint n_targets,
GdkAtom *targets)
{
HWND hwnd = NULL;
gboolean has_image = FALSE;
gint i;
GDK_NOTE (DND, {
gchar *sel_name = gdk_atom_name (selection);
g_print ("gdk_win32_selection_add_targets: %p: %s: ",
owner ? GDK_WINDOW_HWND (owner) : NULL,
sel_name);
g_free (sel_name);
for (i = 0; i < n_targets; i++)
{
gchar *tgt_name = gdk_atom_name (targets[i]);
g_print ("%s", tgt_name);
g_free (tgt_name);
if (i < n_targets - 1)
g_print (", ");
}
g_print ("\n");
});
if (selection != GDK_SELECTION_CLIPBOARD)
return;
if (owner != NULL)
{
if (GDK_WINDOW_DESTROYED (owner))
return;
hwnd = GDK_WINDOW_HWND (owner);
}
if (!API_CALL (OpenClipboard, (hwnd)))
return;
/* We have a very simple strategy: If some kind of pixmap image
* format is being added, actually advertise just PNG and DIB. PNG
* is our preferred format because it can losslessly represent any
* image that gdk-pixbuf formats in general can, even with alpha,
* unambiguously. CF_DIB is also advertised because of the general
* support for it in Windows software, but note that alpha won't be
* handled.
*/
for (i = 0; !has_image && i < n_targets; ++i)
{
UINT cf;
gchar *target_name;
int j;
for (j = 0; j < n_known_pixbuf_formats; j++)
if (targets[i] == known_pixbuf_formats[j])
{
if (!has_image)
{
GDK_NOTE (DND, g_print ("... SetClipboardData(PNG,NULL)\n"));
SetClipboardData (_cf_png, NULL);
GDK_NOTE (DND, g_print ("... SetClipboardData(CF_DIB,NULL)\n"));
SetClipboardData (CF_DIB, NULL);
has_image = TRUE;
}
break;
}
/* If it is one of the pixmap formats, already handled or not
* needed.
*/
if (j < n_known_pixbuf_formats)
continue;
/* We don't bother registering and advertising clipboard formats
* that are X11 specific or no non-GTK+ apps will have ever
* heard of, and when there are equivalent clipboard formats
* that are commonly used.
*/
if (targets[i] == _save_targets ||
targets[i] == _utf8_string ||
targets[i] == GDK_TARGET_STRING ||
targets[i] == _compound_text ||
targets[i] == _text ||
targets[i] == text_plain_charset_utf_8 ||
targets[i] == text_plain_charset_CP1252 ||
targets[i] == text_plain)
continue;
target_name = gdk_atom_name (targets[i]);
if (g_str_has_prefix (target_name, "text/plain;charset="))
{
g_free (target_name);
continue;
}
cf = RegisterClipboardFormat (target_name);
g_hash_table_replace (_format_atom_table,
GINT_TO_POINTER (cf),
targets[i]);
GDK_NOTE (DND, g_print ("... SetClipboardData(%s,NULL)\n",
_gdk_win32_cf_to_string (cf)));
SetClipboardData (cf, NULL);
g_free (target_name);
}
API_CALL (CloseClipboard, ());
}
/* Convert from types such as "image/jpg" or "image/png" to DIB using
* gdk-pixbuf so that image copied from GTK+ apps can be pasted in
* native apps like mspaint.exe
*/
HGLOBAL
_gdk_win32_selection_convert_to_dib (HGLOBAL hdata,
GdkAtom target)
{
GDK_NOTE (DND, {
gchar *target_name = gdk_atom_name (target);
g_print ("_gdk_win32_selection_convert_to_dib: %p %s\n",
hdata, target_name);
g_free (target_name);
});
if (target == _image_bmp)
{
/* No conversion is needed, just strip the BITMAPFILEHEADER */
HGLOBAL hdatanew;
SIZE_T size = GlobalSize (hdata) - sizeof (BITMAPFILEHEADER);
guchar *ptr = GlobalLock (hdata);
memmove (ptr, ptr + sizeof (BITMAPFILEHEADER), size);
GlobalUnlock (hdata);
if ((hdatanew = GlobalReAlloc (hdata, size, GMEM_MOVEABLE)) == NULL)
{
WIN32_API_FAILED ("GlobalReAlloc");
GlobalFree (hdata); /* The old hdata is not freed if error */
}
return hdatanew;
}
g_warning ("Should not happen: We provide some image format but not CF_DIB and CF_DIB is requested.");
return NULL;
}
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