/* Selection processing for Emacs on the Microsoft W32 API.
- Copyright (C) 1993, 1994 Free Software Foundation.
-
+ Copyright (C) 1993, 1994, 2004 Free Software Foundation.
+
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+/* Written by Kevin Gallo, Benjamin Riefenstahl */
+
-/* Written by Kevin Gallo */
+/*
+ * Notes on usage of selection-coding-system and
+ * next-selection-coding-system on MS Windows:
+ *
+ * The selection coding system variables apply only to the version of
+ * the clipboard data that is closest in type, i.e. when a 16-bit
+ * Unicode coding system is given, they apply to he Unicode clipboard
+ * (CF_UNICODETEXT), when a well-known console codepage is given, they
+ * apply to the console version of the clipboard data (CF_OEMTEXT),
+ * else they apply to the normal 8-bit text clipboard (CF_TEXT).
+ *
+ * When pasting (getting data from the OS), the clipboard format that
+ * matches the {next-}selection-coding-system is retrieved. If
+ * Unicode is requested, but not available, 8-bit text (CF_TEXT) is
+ * used. In all other cases the OS will transparently convert
+ * formats, so no other fallback is needed.
+ *
+ * When copying or cutting (sending data to the OS), the data is
+ * announced and stored internally, but only actually rendered on
+ * request. The requester determines the format provided. The
+ * {next-}selection-coding-system is only used, when its corresponding
+ * clipboard type matches the type requested.
+ *
+ * Scenarios to use the facilities for customizing the selection
+ * coding system are:
+ *
+ * ;; Generally use KOI8-R instead of the russian MS codepage for
+ * ;; the 8-bit clipboard.
+ * (set-selection-coding-system 'koi8-r-dos)
+ *
+ * Or
+ *
+ * ;; Create a special clipboard copy function that uses codepage
+ * ;; 1253 (Greek) to copy Greek text to a specific non-Unicode
+ * ;; application.
+ * (defun greek-copy (beg end)
+ * (interactive "r")
+ * (set-next-selection-coding-system 'cp1253-dos)
+ * (copy-region-as-kill beg end))
+ * (global-set-key "\C-c\C-c" 'greek-copy)
+ */
+/*
+ * Ideas for further directions:
+ *
+ * The encoding and decoding routines could be moved to Lisp code
+ * similar to how xselect.c does it (using well-known routine names
+ * for the delayed rendering). If the definition of which clipboard
+ * types should be supported is also moved to Lisp, functionality
+ * could be expanded to CF_HTML, CF_RTF and maybe other types.
+ */
+
#include <config.h>
#include "lisp.h"
#include "w32term.h" /* for all of the w32 includes */
-#include "dispextern.h" /* frame.h seems to want this */
-#include "frame.h" /* Need this to get the X window of selected_frame */
+#include "w32heap.h" /* os_subtype */
#include "blockinput.h"
+#include "keyboard.h" /* cmd_error_internal() */
+#include "charset.h"
+#include "coding.h"
+#include "composite.h"
+
+
+static HGLOBAL convert_to_handle_as_ascii (void);
+static HGLOBAL convert_to_handle_as_coded (Lisp_Object coding_system);
+static Lisp_Object render (Lisp_Object oformat);
+static Lisp_Object render_locale (void);
+static Lisp_Object render_all (void);
+static void run_protected (Lisp_Object (*code) (), Lisp_Object arg);
+static Lisp_Object lisp_error_handler (Lisp_Object error);
+static LRESULT CALLBACK owner_callback (HWND win, UINT msg,
+ WPARAM wp, LPARAM lp);
+static HWND create_owner (void);
+static void setup_config (void);
+static BOOL WINAPI enum_locale_callback (/*const*/ char* loc_string);
+static UINT cp_from_locale (LCID lcid, UINT format);
+static Lisp_Object coding_from_cp (UINT codepage);
+
+
+/* A remnant from X11: Symbol for the CLIPBORD selection type. Other
+ selections are not used on Windows, so we don't need symbols for
+ PRIMARY and SECONDARY. */
Lisp_Object QCLIPBOARD;
-#if 0
-DEFUN ("w32-open-clipboard", Fw32_open_clipboard, Sw32_open_clipboard, 0, 1, 0,
- "This opens the clipboard with the given frame pointer.")
- (frame)
- Lisp_Object frame;
-{
- BOOL ok = FALSE;
-
- if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
-
- BLOCK_INPUT;
-
- ok = OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL);
-
- UNBLOCK_INPUT;
-
- return (ok ? frame : Qnil);
-}
+/* Coding system for communicating with other programs via the
+ clipboard. */
+static Lisp_Object Vselection_coding_system;
-DEFUN ("w32-empty-clipboard", Fw32_empty_clipboard, Sw32_empty_clipboard, 0, 0, 0,
- "This empties the clipboard and assigns ownership to the window which opened the clipboard.")
- ()
-{
- BOOL ok = FALSE;
-
- BLOCK_INPUT;
-
- ok = EmptyClipboard ();
-
- UNBLOCK_INPUT;
-
- return (ok ? Qt : Qnil);
-}
+/* Coding system for the next communication with other programs. */
+static Lisp_Object Vnext_selection_coding_system;
-DEFUN ("w32-close-clipboard", Fw32_close_clipboard, Sw32_close_clipboard, 0, 0, 0,
- "This closes the clipboard.")
- ()
-{
- BOOL ok = FALSE;
-
- BLOCK_INPUT;
-
- ok = CloseClipboard ();
-
- UNBLOCK_INPUT;
-
- return (ok ? Qt : Qnil);
-}
+/* Internal pseudo-constants, initialized in globals_of_w32select()
+ based on current system parameters. */
+static LCID DEFAULT_LCID;
+static UINT ANSICP, OEMCP;
+static Lisp_Object QUNICODE, QANSICP, QOEMCP;
+
+/* A hidden window just for the clipboard management. */
+static HWND clipboard_owner;
+/* A flag to tell WM_DESTROYCLIPBOARD who is to blame this time (just
+ checking GetClipboardOwner() doesn't work, sadly). */
+static int modifying_clipboard = 0;
+
+/* Configured transfer parameters, based on the last inspection of
+ selection-coding-system. */
+static Lisp_Object cfg_coding_system;
+static UINT cfg_codepage;
+static LCID cfg_lcid;
+static UINT cfg_clipboard_type;
+/* The current state for delayed rendering. */
+static Lisp_Object current_text;
+static Lisp_Object current_coding_system;
+static int current_requires_encoding, current_num_nls;
+static UINT current_clipboard_type;
+static LCID current_lcid;
+
+#if TRACE
+#define ONTRACE(stmt) stmt
+#else
+#define ONTRACE(stmt) /*stmt*/
#endif
-DEFUN ("w32-set-clipboard-data", Fw32_set_clipboard_data, Sw32_set_clipboard_data, 1, 2, 0,
- "This sets the clipboard data to the given text.")
- (string, frame)
- Lisp_Object string, frame;
+
+/* This function assumes that there is no multibyte character in
+ current_text, so we can short-cut encoding. */
+
+static HGLOBAL
+convert_to_handle_as_ascii (void)
{
- BOOL ok = TRUE;
- HANDLE htext;
+ HGLOBAL htext = NULL;
int nbytes;
int truelen;
unsigned char *src;
unsigned char *dst;
-
- CHECK_STRING (string, 0);
-
- if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
-
- BLOCK_INPUT;
- nbytes = XSTRING (string)->size + 1;
- src = XSTRING (string)->data;
+ ONTRACE (fprintf (stderr, "convert_to_handle_as_ascii\n"));
- /* need to know final size after '\r' chars are inserted (the
- standard CF_TEXT clipboard format uses CRLF line endings,
- while Emacs uses just LF internally) */
+ nbytes = SBYTES (current_text) + 1;
+ src = SDATA (current_text);
- truelen = nbytes;
- dst = src;
- /* avoid using strchr because it recomputes the length everytime */
- while ((dst = memchr (dst, '\n', nbytes - (dst - src))) != NULL)
- {
- truelen++;
- dst++;
- }
+ /* We need to add to the size the number of LF chars where we have
+ to insert CR chars (the standard CF_TEXT clipboard format uses
+ CRLF line endings, while Emacs uses just LF internally). */
+
+ truelen = nbytes + current_num_nls;
if ((htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, truelen)) == NULL)
- goto error;
+ return NULL;
if ((dst = (unsigned char *) GlobalLock (htext)) == NULL)
- goto error;
-
+ {
+ GlobalFree (htext);
+ return NULL;
+ }
+
/* convert to CRLF line endings expected by clipboard */
while (1)
{
next[-1] = '\r';
next[0] = '\n';
dst = next + 1;
- }
+ }
else
/* copied remaining partial line -> now finished */
break;
}
-
+
GlobalUnlock (htext);
+
+ return htext;
+}
+
+/* This function assumes that there are multibyte or NUL characters in
+ current_text, or that we need to construct Unicode. It runs the
+ text through the encoding machinery. */
+
+static HGLOBAL
+convert_to_handle_as_coded (Lisp_Object coding_system)
+{
+ HGLOBAL htext = NULL, htext2;
+ int nbytes;
+ unsigned char *src;
+ unsigned char *dst = NULL;
+ int bufsize;
+ struct coding_system coding;
+ Lisp_Object string = Qnil;
+
+ ONTRACE (fprintf (stderr, "convert_to_handle_as_coded: %s\n",
+ SDATA (SYMBOL_NAME (coding_system))));
+
+ setup_coding_system (Fcheck_coding_system (coding_system), &coding);
+ coding.src_multibyte = 1;
+ coding.dst_multibyte = 0;
+ /* Need to set COMPOSITION_DISABLED, otherwise Emacs crashes in
+ encode_coding_iso2022 trying to dereference a null pointer. */
+ coding.composing = COMPOSITION_DISABLED;
+ if (coding.type == coding_type_iso2022)
+ coding.flags |= CODING_FLAG_ISO_SAFE;
+ coding.mode |= CODING_MODE_LAST_BLOCK;
+ /* Force DOS line-ends. */
+ coding.eol_type = CODING_EOL_CRLF;
+
+ if (SYMBOLP (coding.pre_write_conversion)
+ && !NILP (Ffboundp (coding.pre_write_conversion)))
+ string = run_pre_post_conversion_on_str (current_text, &coding, 1);
+ else
+ string = current_text;
+
+ nbytes = SBYTES (string);
+ src = SDATA (string);
+
+ bufsize = encoding_buffer_size (&coding, nbytes) +2;
+ htext = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, bufsize);
+
+ if (htext != NULL)
+ dst = (unsigned char *) GlobalLock (htext);
+
+ if (dst != NULL)
+ {
+ encode_coding (&coding, src, dst, nbytes, bufsize-2);
+ /* Add the string terminator. Add two NULs in case we are
+ producing Unicode here. */
+ dst[coding.produced] = dst[coding.produced+1] = '\0';
+ }
+
+ if (dst != NULL)
+ GlobalUnlock (htext);
+
+ if (htext != NULL)
+ {
+ /* Shrink data block to actual size. */
+ htext2 = GlobalReAlloc (htext, coding.produced+2,
+ GMEM_MOVEABLE | GMEM_DDESHARE);
+ if (htext2 != NULL) htext = htext2;
+ }
+
+ return htext;
+}
+
+static Lisp_Object
+render (Lisp_Object oformat)
+{
+ HGLOBAL htext = NULL;
+ UINT format = XFASTINT (oformat);
+
+ ONTRACE (fprintf (stderr, "render\n"));
+
+ if (NILP (current_text))
+ return Qnil;
+
+ if (current_requires_encoding || format == CF_UNICODETEXT)
+ {
+ if (format == current_clipboard_type)
+ htext = convert_to_handle_as_coded (current_coding_system);
+ else
+ switch (format)
+ {
+ case CF_UNICODETEXT:
+ htext = convert_to_handle_as_coded (QUNICODE);
+ break;
+ case CF_TEXT:
+ case CF_OEMTEXT:
+ {
+ Lisp_Object cs;
+ cs = coding_from_cp (cp_from_locale (current_lcid, format));
+ htext = convert_to_handle_as_coded (cs);
+ break;
+ }
+ }
+ }
+ else
+ htext = convert_to_handle_as_ascii ();
+
+ ONTRACE (fprintf (stderr, "render: htext = 0x%08X\n", (unsigned) htext));
+
+ if (htext == NULL)
+ return Qnil;
+
+ if (SetClipboardData (format, htext) == NULL)
+ {
+ GlobalFree(htext);
+ return Qnil;
+ }
+
+ return Qt;
+}
+
+static Lisp_Object
+render_locale (void)
+{
+ HANDLE hlocale = NULL;
+ LCID * lcid_ptr;
+
+ ONTRACE (fprintf (stderr, "render_locale\n"));
+
+ if (current_lcid == LOCALE_NEUTRAL || current_lcid == DEFAULT_LCID)
+ return Qt;
+
+ hlocale = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, sizeof (current_lcid));
+ if (hlocale == NULL)
+ return Qnil;
+
+ if ((lcid_ptr = (LCID *) GlobalLock (hlocale)) == NULL)
+ {
+ GlobalFree(hlocale);
+ return Qnil;
+ }
+
+ *lcid_ptr = current_lcid;
+ GlobalUnlock (hlocale);
+
+ if (SetClipboardData (CF_LOCALE, hlocale) == NULL)
+ {
+ GlobalFree(hlocale);
+ return Qnil;
+ }
+
+ return Qt;
+}
+
+/* At the end of the program, we want to ensure that our clipboard
+ data survives us. This code will do that. */
+
+static Lisp_Object
+render_all (void)
+{
+ ONTRACE (fprintf (stderr, "render_all\n"));
+
+ /* According to the docs we should not call OpenClipboard() here,
+ but testing on W2K and working code in other projects shows that
+ it is actually necessary. */
+
+ OpenClipboard (NULL);
+
+ /* There is no usefull means to report errors here, there are none
+ expected anyway, and even if there were errors, they wouldn't do
+ any harm. So we just go ahead and do what has to be done without
+ bothering with error handling. */
+
+ ++modifying_clipboard;
+ EmptyClipboard ();
+ --modifying_clipboard;
+
+ /* For text formats that we don't render here, the OS can use its
+ own translation rules instead, so we don't really need to offer
+ everything. To minimize memory consumption we cover three
+ possible situations based on our primary format as detected from
+ selection-coding-system (see setup_config()):
+
+ - Post CF_TEXT only. Let the OS convert to CF_OEMTEXT and the OS
+ (on NT) or the application (on 9x/Me) convert to
+ CF_UNICODETEXT.
+
+ - Post CF_OEMTEXT only. Similar automatic conversions happen as
+ for CF_TEXT.
+
+ - Post CF_UNICODETEXT + CF_TEXT. 9x itself ignores
+ CF_UNICODETEXT, even though some applications can still handle
+ it.
+
+ Note 1: We render the less capable CF_TEXT *before* the more
+ capable CF_UNICODETEXT, to prevent clobbering through automatic
+ conversions, just in case.
+
+ Note 2: We could check os_subtype here and only render the
+ additional CF_TEXT on 9x/Me. But OTOH with
+ current_clipboard_type == CF_UNICODETEXT we don't involve the
+ automatic conversions anywhere else, so to get consistent
+ results, we probably don't want to rely on it here either. */
+
+ render_locale();
+
+ if (current_clipboard_type == CF_UNICODETEXT)
+ render (make_number (CF_TEXT));
+ render (make_number (current_clipboard_type));
+
+ CloseClipboard ();
+
+ return Qnil;
+}
+
+static void
+run_protected (Lisp_Object (*code) (), Lisp_Object arg)
+{
+ /* FIXME: This works but it doesn't feel right. Too much fiddling
+ with global variables and calling strange looking functions. Is
+ this really the right way to run Lisp callbacks? */
+
+ extern int waiting_for_input;
+ int owfi;
+
+ BLOCK_INPUT;
+
+ /* Fsignal calls abort() if it sees that waiting_for_input is
+ set. */
+ owfi = waiting_for_input;
+ waiting_for_input = 0;
+
+ internal_condition_case_1 (code, arg, Qt, lisp_error_handler);
+
+ waiting_for_input = owfi;
+
+ UNBLOCK_INPUT;
+}
+
+static Lisp_Object
+lisp_error_handler (Lisp_Object error)
+{
+ Vsignaling_function = Qnil;
+ cmd_error_internal (error, "Error in delayed clipboard rendering: ");
+ Vinhibit_quit = Qt;
+ return Qt;
+}
+
+
+static LRESULT CALLBACK
+owner_callback (HWND win, UINT msg, WPARAM wp, LPARAM lp)
+{
+ switch (msg)
+ {
+ case WM_RENDERFORMAT:
+ ONTRACE (fprintf (stderr, "WM_RENDERFORMAT\n"));
+ run_protected (render, make_number (wp));
+ return 0;
+
+ case WM_RENDERALLFORMATS:
+ ONTRACE (fprintf (stderr, "WM_RENDERALLFORMATS\n"));
+ run_protected (render_all, Qnil);
+ return 0;
+
+ case WM_DESTROYCLIPBOARD:
+ if (!modifying_clipboard)
+ {
+ ONTRACE (fprintf (stderr, "WM_DESTROYCLIPBOARD (other)\n"));
+ current_text = Qnil;
+ current_coding_system = Qnil;
+ }
+ else
+ {
+ ONTRACE (fprintf (stderr, "WM_DESTROYCLIPBOARD (self)\n"));
+ }
+ return 0;
+
+ case WM_DESTROY:
+ if (win == clipboard_owner)
+ clipboard_owner = NULL;
+ break;
+ }
+
+ return DefWindowProc (win, msg, wp, lp);
+}
+
+static HWND
+create_owner (void)
+{
+ static const char CLASSNAME[] = "Emacs Clipboard";
+ WNDCLASS wc;
+
+ memset (&wc, 0, sizeof (wc));
+ wc.lpszClassName = CLASSNAME;
+ wc.lpfnWndProc = owner_callback;
+ RegisterClass (&wc);
+
+ return CreateWindow (CLASSNAME, CLASSNAME, 0, 0, 0, 0, 0, NULL, NULL,
+ NULL, NULL);
+}
+
+/* Called on exit by term_ntproc() in w32.c */
+
+void
+term_w32select (void)
+{
+ /* This is needed to trigger WM_RENDERALLFORMATS. */
+ if (clipboard_owner != NULL)
+ DestroyWindow (clipboard_owner);
+}
+
+static void
+setup_config (void)
+{
+ const char *coding_name;
+ const char *cp;
+ char *end;
+ int slen;
+ Lisp_Object new_coding_system;
+
+ CHECK_SYMBOL (Vselection_coding_system);
+
+ /* Check if we have it cached */
+ new_coding_system = NILP (Vnext_selection_coding_system) ?
+ Vselection_coding_system : Vnext_selection_coding_system;
+ if (!NILP (cfg_coding_system)
+ && EQ (cfg_coding_system, new_coding_system))
+ return;
+ cfg_coding_system = new_coding_system;
- if (!OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL))
- goto error;
+ /* Set some sensible fallbacks */
+ cfg_codepage = ANSICP;
+ cfg_lcid = LOCALE_NEUTRAL;
+ cfg_clipboard_type = CF_TEXT;
+
+ /* Interpret the coding system symbol name */
+ coding_name = SDATA (SYMBOL_NAME (cfg_coding_system));
+
+ /* "(.*-)?utf-16.*" -> CF_UNICODETEXT */
+ cp = strstr (coding_name, "utf-16");
+ if (cp != NULL && (cp == coding_name || cp[-1] == '-'))
+ {
+ cfg_clipboard_type = CF_UNICODETEXT;
+ return;
+ }
+
+ /* "cp[0-9]+.*" or "windows-[0-9]+.*" -> CF_TEXT or CF_OEMTEXT */
+ slen = strlen (coding_name);
+ if (slen >= 4 && coding_name[0] == 'c' && coding_name[1] == 'p')
+ cp = coding_name + 2;
+ else if (slen >= 10 && memcmp (coding_name, "windows-", 8) == 0)
+ cp = coding_name + 8;
+ else
+ return;
+
+ end = (char*)cp;
+ cfg_codepage = strtol (cp, &end, 10);
+
+ /* Error return from strtol() or number of digits < 2 -> Restore the
+ default and drop it. */
+ if (cfg_codepage == 0 || (end-cp) < 2 )
+ {
+ cfg_codepage = ANSICP;
+ return;
+ }
+
+ /* Is it the currently active system default? */
+ if (cfg_codepage == ANSICP)
+ {
+ /* cfg_clipboard_type = CF_TEXT; */
+ return;
+ }
+ if (cfg_codepage == OEMCP)
+ {
+ cfg_clipboard_type = CF_OEMTEXT;
+ return;
+ }
+
+ /* Else determine a suitable locale the hard way. */
+ EnumSystemLocales (enum_locale_callback, LCID_INSTALLED);
+}
+
+static BOOL WINAPI
+enum_locale_callback (/*const*/ char* loc_string)
+{
+ LCID lcid;
+ UINT codepage;
+
+ lcid = strtoul (loc_string, NULL, 16);
+
+ /* Is the wanted codepage the "ANSI" codepage for this locale? */
+ codepage = cp_from_locale (lcid, CF_TEXT);
+ if (codepage == cfg_codepage)
+ {
+ cfg_lcid = lcid;
+ cfg_clipboard_type = CF_TEXT;
+ return FALSE; /* Stop enumeration */
+ }
- ok = EmptyClipboard () && SetClipboardData (CF_TEXT, htext);
+ /* Is the wanted codepage the OEM codepage for this locale? */
+ codepage = cp_from_locale (lcid, CF_OEMTEXT);
+ if (codepage == cfg_codepage)
+ {
+ cfg_lcid = lcid;
+ cfg_clipboard_type = CF_OEMTEXT;
+ return FALSE; /* Stop enumeration */
+ }
+
+ return TRUE; /* Continue enumeration */
+}
+
+static UINT
+cp_from_locale (LCID lcid, UINT format)
+{
+ char buffer[20] = "";
+ UINT variant, cp;
+
+ variant =
+ format == CF_TEXT ? LOCALE_IDEFAULTANSICODEPAGE : LOCALE_IDEFAULTCODEPAGE;
+
+ GetLocaleInfo (lcid, variant, buffer, sizeof (buffer));
+ cp = strtoul (buffer, NULL, 10);
+
+ if (cp == CP_ACP)
+ return ANSICP;
+ else if (cp == CP_OEMCP)
+ return OEMCP;
+ else
+ return cp;
+}
+
+static Lisp_Object
+coding_from_cp (UINT codepage)
+{
+ char buffer[30];
+ sprintf (buffer, "cp%d-dos", (int) codepage);
+ return intern (buffer);
+ /* We don't need to check that this coding system exists right here,
+ because that is done when the coding system is actually
+ instantiated, i.e. it is passed through Fcheck_coding_system()
+ there. */
+}
+
+
+DEFUN ("w32-set-clipboard-data", Fw32_set_clipboard_data,
+ Sw32_set_clipboard_data, 1, 2, 0,
+ doc: /* This sets the clipboard data to the given text. */)
+ (string, ignored)
+ Lisp_Object string, ignored;
+{
+ BOOL ok = TRUE;
+ int nbytes;
+ unsigned char *src;
+ unsigned char *dst;
+ unsigned char *end;
+
+ /* This parameter used to be the current frame, but we don't use
+ that any more. */
+ (void) ignored;
+
+ CHECK_STRING (string);
+
+ setup_config ();
+
+ current_text = string;
+ current_coding_system = cfg_coding_system;
+ current_clipboard_type = cfg_clipboard_type;
+ current_lcid = cfg_lcid;
+ current_num_nls = 0;
+ current_requires_encoding = 0;
+ BLOCK_INPUT;
+
+ /* Check for non-ASCII characters. While we are at it, count the
+ number of LFs, so we know how many CRs we will have to add later
+ (just in the case where we can use our internal ASCII rendering,
+ see code and comment in convert_to_handle_as_ascii() above). */
+ nbytes = SBYTES (string);
+ src = SDATA (string);
+
+ for (dst = src, end = src+nbytes; dst < end; dst++)
+ {
+ if (*dst == '\n')
+ current_num_nls++;
+ else if (*dst >= 0x80 || *dst == 0)
+ {
+ current_requires_encoding = 1;
+ break;
+ }
+ }
+
+ if (!current_requires_encoding)
+ {
+ /* If all we have is ASCII we don't need to pretend we offer
+ anything fancy. */
+ current_coding_system = Qraw_text;
+ current_clipboard_type = CF_TEXT;
+ current_lcid = LOCALE_NEUTRAL;
+ }
+
+ if (!OpenClipboard (clipboard_owner))
+ goto error;
+
+ ++modifying_clipboard;
+ ok = EmptyClipboard ();
+ --modifying_clipboard;
+
+ /* If we have something non-ASCII we may want to set a locale. We
+ do that directly (non-delayed), as it's just a small bit. */
+ if (ok)
+ ok = !NILP(render_locale());
+
+ if (ok)
+ {
+ if (clipboard_owner == NULL)
+ {
+ /* If for some reason we don't have a clipboard_owner, we
+ just set the text format as chosen by the configuration
+ and than forget about the whole thing. */
+ ok = !NILP(render (make_number (current_clipboard_type)));
+ current_text = Qnil;
+ current_coding_system = Qnil;
+ }
+ else
+ {
+ /* Advertise all supported formats so that whatever the
+ requester chooses, only one encoding step needs to be
+ made. This is intentionally different from what we do in
+ the handler for WM_RENDERALLFORMATS. */
+ SetClipboardData (CF_UNICODETEXT, NULL);
+ SetClipboardData (CF_TEXT, NULL);
+ SetClipboardData (CF_OEMTEXT, NULL);
+ }
+ }
+
CloseClipboard ();
-
+
+ /* With delayed rendering we haven't really "used" this coding
+ system yet, and it's even unclear if we ever will. But this is a
+ way to tell the upper level what we *would* use under ideal
+ circumstances.
+
+ We don't signal the actually used coding-system later when we
+ finally render, because that can happen at any time and we don't
+ want to disturb the "foreground" action. */
+ if (ok)
+ Vlast_coding_system_used = current_coding_system;
+
+ Vnext_selection_coding_system = Qnil;
+
if (ok) goto done;
error:
-
+
ok = FALSE;
- if (htext) GlobalFree (htext);
-
+ current_text = Qnil;
+ current_coding_system = Qnil;
+
done:
UNBLOCK_INPUT;
-
+
return (ok ? string : Qnil);
}
-DEFUN ("w32-get-clipboard-data", Fw32_get_clipboard_data, Sw32_get_clipboard_data, 0, 1, 0,
- "This gets the clipboard data in text format.")
- (frame)
- Lisp_Object frame;
+
+DEFUN ("w32-get-clipboard-data", Fw32_get_clipboard_data,
+ Sw32_get_clipboard_data, 0, 1, 0,
+ doc: /* This gets the clipboard data in text format. */)
+ (ignored)
+ Lisp_Object ignored;
{
- HANDLE htext;
+ HGLOBAL htext;
Lisp_Object ret = Qnil;
-
- if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 0);
-
+ UINT actual_clipboard_type;
+ int use_configured_coding_system = 1;
+
+ /* This parameter used to be the current frame, but we don't use
+ that any more. */
+ (void) ignored;
+
+ /* Don't pass our own text from the clipboard (which might be
+ troublesome if the killed text includes null characters). */
+ if (!NILP (current_text))
+ return ret;
+
+ setup_config ();
+ actual_clipboard_type = cfg_clipboard_type;
+
BLOCK_INPUT;
-
- if (!OpenClipboard ((!NILP (frame) && FRAME_W32_P (XFRAME (frame))) ? FRAME_W32_WINDOW (XFRAME (frame)) : NULL))
+
+ if (!OpenClipboard (clipboard_owner))
goto done;
-
- if ((htext = GetClipboardData (CF_TEXT)) == NULL)
+
+ if ((htext = GetClipboardData (actual_clipboard_type)) == NULL)
+ {
+ /* If we want CF_UNICODETEXT but can't get it, the current
+ coding system is useless. OTOH we can still try and decode
+ CF_TEXT based on the locale that the system gives us and that
+ we get down below. */
+ if (actual_clipboard_type == CF_UNICODETEXT)
+ {
+ htext = GetClipboardData (CF_TEXT);
+ if (htext != NULL)
+ {
+ actual_clipboard_type = CF_TEXT;
+ use_configured_coding_system = 0;
+ }
+ }
+ }
+ if (htext == NULL)
goto closeclip;
{
unsigned char *dst;
int nbytes;
int truelen;
-
+ int require_decoding = 0;
+
if ((src = (unsigned char *) GlobalLock (htext)) == NULL)
goto closeclip;
-
- nbytes = strlen (src);
-
- /* need to know final size after '\r' chars are removed because
- we can't change the string size manually, and doing an extra
- copy is silly */
- truelen = nbytes;
- dst = src;
- /* avoid using strchr because it recomputes the length everytime */
- while ((dst = memchr (dst, '\r', nbytes - (dst - src))) != NULL)
+ /* If the clipboard data contains any non-ascii code, we need to
+ decode it with a coding system. */
+ if (actual_clipboard_type == CF_UNICODETEXT)
{
- truelen--;
- dst++;
+ nbytes = lstrlenW ((WCHAR *)src) * 2;
+ require_decoding = 1;
}
+ else
+ {
+ int i;
- ret = make_uninit_string (truelen);
+ nbytes = strlen (src);
- /* convert CRLF line endings (the standard CF_TEXT clipboard
- format) to LF endings as used internally by Emacs */
+ for (i = 0; i < nbytes; i++)
+ {
+ if (src[i] >= 0x80)
+ {
+ require_decoding = 1;
+ break;
+ }
+ }
+ }
- dst = XSTRING (ret)->data;
- while (1)
+ if (require_decoding)
{
- unsigned char *next;
- /* copy next line or remaining bytes excluding '\0' */
- next = _memccpy (dst, src, '\r', nbytes);
- if (next)
+ int bufsize;
+ unsigned char *buf;
+ struct coding_system coding;
+ Lisp_Object coding_system = Qnil;
+
+ /* `next-selection-coding-system' should override everything,
+ even when the locale passed by the system disagrees. The
+ only exception is when `next-selection-coding-system'
+ requested CF_UNICODETEXT and we couldn't get that. */
+ if (use_configured_coding_system
+ && !NILP (Vnext_selection_coding_system))
+ coding_system = Vnext_selection_coding_system;
+
+ /* If we have CF_TEXT or CF_OEMTEXT, we want to check out
+ CF_LOCALE, too. */
+ else if (actual_clipboard_type != CF_UNICODETEXT)
{
- /* copied one line ending with '\r' */
- int copied = next - dst;
- nbytes -= copied;
- dst += copied - 1; /* overwrite '\r' */
- src += copied;
- }
- else
- /* copied remaining partial line -> now finished */
- break;
+ HGLOBAL hlocale;
+ LCID lcid = DEFAULT_LCID;
+ UINT cp;
+
+ /* Documentation says that the OS always generates
+ CF_LOCALE info automatically, so the locale handle
+ should always be present. Fact is that this is not
+ always true on 9x ;-(. */
+ hlocale = GetClipboardData (CF_LOCALE);
+ if (hlocale != NULL)
+ {
+ const LCID * lcid_ptr;
+ lcid_ptr = (const LCID *) GlobalLock (hlocale);
+ if (lcid_ptr != NULL)
+ {
+ lcid = *lcid_ptr;
+ GlobalUnlock (hlocale);
+ }
+
+ /* 9x has garbage as the sort order (to be exact there
+ is another instance of the language id in the upper
+ word). We don't care about sort order anyway, so
+ we just filter out the unneeded mis-information to
+ avoid irritations. */
+ lcid = MAKELCID (LANGIDFROMLCID (lcid), SORT_DEFAULT);
+ }
+
+ /* If we are using fallback from CF_UNICODETEXT, we can't
+ use the configured coding system. Also we don't want
+ to use it, if the system has supplied us with a locale
+ and it is not just the system default. */
+ if (!use_configured_coding_system || lcid != DEFAULT_LCID)
+ {
+ cp = cp_from_locale (lcid, actual_clipboard_type);
+ /* If it's just our current standard setting anyway,
+ use the coding system that the user has selected.
+ Otherwise create a new spec to match the locale
+ that was specified by the other side or the
+ system. */
+ if (!use_configured_coding_system || cp != cfg_codepage)
+ coding_system = coding_from_cp (cp);
+ }
+ }
+
+ if (NILP (coding_system))
+ coding_system = Vselection_coding_system;
+ Vnext_selection_coding_system = Qnil;
+
+ setup_coding_system (Fcheck_coding_system (coding_system), &coding);
+ coding.src_multibyte = 0;
+ coding.dst_multibyte = 1;
+ coding.mode |= CODING_MODE_LAST_BLOCK;
+ /* We explicitely disable composition handling because
+ selection data should not contain any composition
+ sequence. */
+ coding.composing = COMPOSITION_DISABLED;
+ /* Force DOS line-ends. */
+ coding.eol_type = CODING_EOL_CRLF;
+
+ bufsize = decoding_buffer_size (&coding, nbytes);
+ buf = (unsigned char *) xmalloc (bufsize);
+ decode_coding (&coding, src, buf, nbytes, bufsize);
+ Vlast_coding_system_used = coding.symbol;
+ ret = make_string_from_bytes ((char *) buf,
+ coding.produced_char, coding.produced);
+ xfree (buf);
+ if (SYMBOLP (coding.post_read_conversion)
+ && !NILP (Ffboundp (coding.post_read_conversion)))
+ ret = run_pre_post_conversion_on_str (ret, &coding, 0);
+ }
+ else
+ {
+ /* FIXME: We may want to repeat the code in this branch for
+ the Unicode case. */
+
+ /* Need to know final size after CR chars are removed because
+ we can't change the string size manually, and doing an
+ extra copy is silly. We only remove CR when it appears as
+ part of CRLF. */
+
+ truelen = nbytes;
+ dst = src;
+ /* avoid using strchr because it recomputes the length everytime */
+ while ((dst = memchr (dst, '\r', nbytes - (dst - src))) != NULL)
+ {
+ if (dst[1] == '\n') /* safe because of trailing '\0' */
+ truelen--;
+ dst++;
+ }
+
+ ret = make_uninit_string (truelen);
+
+ /* Convert CRLF line endings (the standard CF_TEXT clipboard
+ format) to LF endings as used internally by Emacs. */
+
+ dst = SDATA (ret);
+ while (1)
+ {
+ unsigned char *next;
+ /* copy next line or remaining bytes excluding '\0' */
+ next = _memccpy (dst, src, '\r', nbytes);
+ if (next)
+ {
+ /* copied one line ending with '\r' */
+ int copied = next - dst;
+ nbytes -= copied;
+ dst += copied;
+ src += copied;
+ if (*src == '\n')
+ dst--; /* overwrite '\r' with '\n' */
+ }
+ else
+ /* copied remaining partial line -> now finished */
+ break;
+ }
+
+ Vlast_coding_system_used = Qraw_text;
}
GlobalUnlock (htext);
closeclip:
CloseClipboard ();
-
+
done:
UNBLOCK_INPUT;
-
+
return (ret);
}
/* Support checking for a clipboard selection. */
DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p,
- 0, 1, 0,
- "Whether there is an owner for the given X Selection.\n\
-The arg should be the name of the selection in question, typically one of\n\
-the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\
-\(Those are literal upper-case symbol names, since that's what X expects.)\n\
-For convenience, the symbol nil is the same as `PRIMARY',\n\
-and t is the same as `SECONDARY'.")
+ 0, 1, 0,
+ doc: /* Whether there is an owner for the given X Selection.
+The arg should be the name of the selection in question, typically one of
+the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.
+\(Those are literal upper-case symbol names, since that's what X expects.)
+For convenience, the symbol nil is the same as `PRIMARY',
+and t is the same as `SECONDARY'. */)
(selection)
Lisp_Object selection;
{
- CHECK_SYMBOL (selection, 0);
+ CHECK_SYMBOL (selection);
/* Return nil for PRIMARY and SECONDARY selections; for CLIPBOARD, check
if the clipboard currently has valid text format contents. */
if (OpenClipboard (NULL))
{
- int format = 0;
- while (format = EnumClipboardFormats (format))
- if (format == CF_TEXT)
+ UINT format = 0;
+ setup_config ();
+ while ((format = EnumClipboardFormats (format)))
+ /* Check CF_TEXT in addition to cfg_clipboard_type,
+ because we can fall back on that if CF_UNICODETEXT is
+ not available. Actually a check for CF_TEXT only
+ should be enough. */
+ if (format == cfg_clipboard_type || format == CF_TEXT)
{
val = Qt;
break;
return Qnil;
}
-void
+/* One-time init. Called in the un-dumped Emacs, but not in the
+ dumped version. */
+
+void
syms_of_w32select ()
{
-#if 0
- defsubr (&Sw32_open_clipboard);
- defsubr (&Sw32_empty_clipboard);
- defsubr (&Sw32_close_clipboard);
-#endif
defsubr (&Sw32_set_clipboard_data);
defsubr (&Sw32_get_clipboard_data);
defsubr (&Sx_selection_exists_p);
+ DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system,
+ doc: /* Coding system for communicating with other programs.
+When sending or receiving text via cut_buffer, selection, and
+clipboard, the text is encoded or decoded by this coding system.
+The default value is the current system default encoding on 9x/Me and
+`utf-16le-dos' (Unicode) on NT/W2K/XP. */);
+ /* The actual value is set dynamically in the dumped Emacs, see
+ below. */
+ Vselection_coding_system = Qnil;
+
+ DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system,
+ doc: /* Coding system for the next communication with other programs.
+Usually, `selection-coding-system' is used for communicating with
+other programs. But, if this variable is set, it is used for the
+next communication only. After the communication, this variable is
+set to nil. */);
+ Vnext_selection_coding_system = Qnil;
+
QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD);
+
+ cfg_coding_system = Qnil; staticpro (&cfg_coding_system);
+ current_text = Qnil; staticpro (¤t_text);
+ current_coding_system = Qnil; staticpro (¤t_coding_system);
+
+ QUNICODE = intern ("utf-16le-dos"); staticpro (&QUNICODE);
+ QANSICP = Qnil; staticpro (&QANSICP);
+ QOEMCP = Qnil; staticpro (&QOEMCP);
}
+
+/* One-time init. Called in the dumped Emacs, but not in the
+ un-dumped version. */
+
+void
+globals_of_w32select ()
+{
+ DEFAULT_LCID = GetUserDefaultLCID ();
+ /* Drop the sort order from the LCID, so we can compare this with
+ CF_LOCALE objects that have the same fix on 9x. */
+ DEFAULT_LCID = MAKELCID (LANGIDFROMLCID (DEFAULT_LCID), SORT_DEFAULT);
+
+ ANSICP = GetACP ();
+ OEMCP = GetOEMCP ();
+
+ QANSICP = coding_from_cp (ANSICP);
+ QOEMCP = coding_from_cp (OEMCP);
+
+ if (os_subtype == OS_NT)
+ Vselection_coding_system = QUNICODE;
+ else if (inhibit_window_system)
+ Vselection_coding_system = QOEMCP;
+ else
+ Vselection_coding_system = QANSICP;
+
+ clipboard_owner = create_owner ();
+}
+
+/* arch-tag: c96e9724-5eb1-4dad-be07-289f092fd2af
+ (do not change this comment) */
HCoop / bpt / emacs.git / blobdiff