Convert the puts usage to use DB(). Add the initial handle_image method. Check for nil in the NSString instantiation in various places. Add some commentary to enhance the clarity of why I did some things.
809 lines
19 KiB
Objective-C
809 lines
19 KiB
Objective-C
/* x-selection.m -- proxies between NSPasteboard and X11 selections
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$Id: x-selection.m,v 1.9 2006-07-07 18:24:28 jharper Exp $
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Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
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HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name(s) of the above
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copyright holders shall not be used in advertising or otherwise to
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promote the sale, use or other dealings in this Software without
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prior written authorization. */
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#import "x-selection.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <X11/Xatom.h>
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#include <unistd.h> /*GPS may not be needed now */
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// These will be set by X11Controller.m once this is integrated into a server thread
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BOOL pbproxy_active = YES;
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BOOL pbproxy_primary_on_grab = NO; // This is provided as an option for people who want it and has issues that won't ever be addressed to make it *always* work
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BOOL pbproxy_clipboard_to_pasteboard = YES;
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BOOL pbproxy_pasteboard_to_primary = YES;
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BOOL pbproxy_pasteboard_to_clipboard = YES;
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@implementation x_selection
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static struct propdata null_propdata = {NULL, 0};
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static void
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init_propdata (struct propdata *pdata)
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{
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*pdata = null_propdata;
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}
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static void
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free_propdata (struct propdata *pdata)
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{
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free (pdata->data);
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*pdata = null_propdata;
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}
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/* Return True if this is an INCR-style transfer. */
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static Bool
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is_incr_type (XSelectionEvent *e)
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{
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Atom seltype;
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int format;
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unsigned long numitems = 0UL, bytesleft = 0UL;
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unsigned char *chunk;
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if (Success != XGetWindowProperty (x_dpy, e->requestor, e->property,
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/*offset*/ 0L, /*length*/ 4UL,
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/*Delete*/ False,
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AnyPropertyType, &seltype, &format,
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&numitems, &bytesleft, &chunk))
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{
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return False;
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}
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if(chunk)
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XFree(chunk);
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return (seltype == atoms->incr) ? True : False;
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}
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/* This finds the preferred type from a TARGETS list.*/
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static Atom
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find_preferred (struct propdata *pdata)
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{
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Atom a = None;
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size_t i;
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Bool png = False, utf8 = False, string = False;
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if (pdata->length % sizeof (a))
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{
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fprintf(stderr, "Atom list is not a multiple of the size of an atom!\n");
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return None;
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}
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for (i = 0; i < pdata->length; i += sizeof (a))
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{
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memcpy (&a, pdata->data + i, sizeof (a));
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if (a == atoms->image_png)
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{
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png = True;
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}
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else if (a == atoms->utf8_string)
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{
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utf8 = True;
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}
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else if (a == atoms->string)
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{
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string = True;
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}
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}
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/*We prefer PNG over strings, and UTF8 over a Latin-1 string.*/
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if (png)
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return atoms->image_png;
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if (utf8)
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return atoms->utf8_string;
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if (string)
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return atoms->string;
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/* This is evidently something we don't know how to handle.*/
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return None;
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}
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/*
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* Return True if an error occurs. Return False if pdata has data
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* and we finished.
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* The property is only deleted when bytesleft is 0 if delete is True.
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*/
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static Bool
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get_property(Window win, Atom property, struct propdata *pdata, Bool delete, Atom *type)
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{
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long offset = 0;
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unsigned long numitems, bytesleft = 0;
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#ifdef TEST
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/* This is used to test the growth handling. */
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unsigned long length = 4UL;
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#else
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unsigned long length = (100000UL + 3) / 4;
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#endif
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unsigned char *buf = NULL, *chunk = NULL;
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size_t buflen = 0, chunkbytesize = 0;
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int format;
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if(None == property)
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return True;
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do {
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unsigned long newbuflen;
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unsigned char *newbuf;
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if (Success != XGetWindowProperty (x_dpy, win, property,
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offset, length, delete,
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AnyPropertyType,
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type, &format, &numitems,
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&bytesleft, &chunk)) {
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free (buf);
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return True;
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}
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#ifdef TEST
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printf("format %d numitems %lu bytesleft %lu\n",
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format, numitems, bytesleft);
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printf("type %s\n", XGetAtomName(dis, *type));
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#endif
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/* Format is the number of bits. */
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chunkbytesize = numitems * (format / 8);
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#ifdef TEST
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printf("chunkbytesize %zu\n", chunkbytesize);
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#endif
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newbuflen = buflen + chunkbytesize;
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newbuf = realloc (buf, newbuflen);
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if (NULL == newbuf) {
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XFree (chunk);
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free (buf);
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return True;
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}
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memcpy (newbuf + buflen, chunk, chunkbytesize);
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XFree (chunk);
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buf = newbuf;
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buflen = newbuflen;
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/* offset is a multiple of 32 bits*/
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offset += chunkbytesize / 4;
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} while (bytesleft > 0);
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pdata->data = buf;
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pdata->length = buflen;
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return /*success*/ False;
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}
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static unsigned long *
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read_prop_32 (Window id, Atom prop, int *nitems_ret)
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{
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int r, format;
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Atom type;
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unsigned long nitems, bytes_after;
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unsigned char *data;
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r = XGetWindowProperty (x_dpy, id, prop, 0, 0,
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False, AnyPropertyType, &type, &format,
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&nitems, &bytes_after, &data);
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if (r == Success && bytes_after != 0)
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{
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XFree (data);
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r = XGetWindowProperty (x_dpy, id, prop, 0,
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(bytes_after / 4) + 1, False,
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AnyPropertyType, &type, &format,
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&nitems, &bytes_after, &data);
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}
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if (r != Success)
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return NULL;
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if (format != 32)
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{
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XFree (data);
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return NULL;
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}
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*nitems_ret = nitems;
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return (unsigned long *) data;
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}
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/*
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* This should be called after a selection has been copied,
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* or when the selection is unfinished before a transfer completes.
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*/
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- (void) release_pending
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{
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free_propdata (&pending.propdata);
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pending.requestor = None;
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pending.selection = None;
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}
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/* Return True if an error occurs during an append.*/
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/* Return False if the append succeeds. */
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- (Bool) append_to_pending:(struct propdata *)pdata requestor:(Window)requestor
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{
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unsigned char *newdata;
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size_t newlength;
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if (requestor != pending.requestor)
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{
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[self release_pending];
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pending.requestor = requestor;
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}
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newlength = pending.propdata.length + pdata->length;
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newdata = realloc(pending.propdata.data, newlength);
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if(NULL == newdata)
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{
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perror("realloc propdata");
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[self release_pending];
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return True;
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}
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memcpy(newdata + pending.propdata.length, pdata->data, pdata->length);
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pending.propdata.data = newdata;
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pending.propdata.length = newlength;
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return False;
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}
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/* Called when X11 becomes active (i.e. has key focus) */
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- (void) x_active:(Time)timestamp
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{
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TRACE ();
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#if 0
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if ([_pasteboard changeCount] != _my_last_change)
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{
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if ([_pasteboard availableTypeFromArray: _known_types] != nil)
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{
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/* Pasteboard has data we should proxy; I think it makes
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sense to put it on both CLIPBOARD and PRIMARY */
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XSetSelectionOwner (x_dpy, atoms->clipboard,
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_selection_window, timestamp);
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XSetSelectionOwner (x_dpy, XA_PRIMARY,
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_selection_window, timestamp);
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}
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}
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#endif
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}
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/* Called when X11 loses key focus */
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- (void) x_inactive:(Time)timestamp
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{
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Window w;
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TRACE ();
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#if 0
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if (_proxied_selection == XA_PRIMARY)
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return;
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w = XGetSelectionOwner (x_dpy, atoms->clipboard);
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if (w != None && w != _selection_window)
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{
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/* An X client has the selection, proxy it to the pasteboard */
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_my_last_change = [_pasteboard declareTypes:_known_types owner:self];
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_proxied_selection = atoms->clipboard;
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}
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#endif
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}
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/* Called when the Edit/Copy item on the main X11 menubar is selected
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and no appkit window claims it. */
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- (void) x_copy:(Time)timestamp
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{
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Window w;
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w = XGetSelectionOwner (x_dpy, atoms->primary);
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if (None != w)
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{
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DB ("requesting targets\n");
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request_atom = atoms->targets;
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XConvertSelection (x_dpy, atoms->primary, atoms->targets,
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atoms->primary, _selection_window, CurrentTime);
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}
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else
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{
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XBell (x_dpy, 0);
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}
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}
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/*
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*
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*/
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- (void) set_clipboard_manager
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{
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if (None != XGetSelectionOwner (x_dpy, atoms->clipboard_manager))
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{
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fprintf (stderr, "A clipboard manager is already running!\n"
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"pbproxy can not continue!\n");
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exit (EXIT_FAILURE);
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}
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XSetSelectionOwner (x_dpy, atoms->clipboard_manager, _selection_window,
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CurrentTime);
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}
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/*
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* This occurs when we previously owned a selection,
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* and then lost it from another client.
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*/
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- (void) clear_event:(XSelectionClearEvent *)e
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{
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TRACE ();
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if (atoms->clipboard == e->selection)
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{
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/*
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* We lost ownership of the CLIPBOARD.
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*/
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[self claim_clipboard];
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}
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else if (atoms->clipboard_manager == e->selection)
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{
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/*TODO/HMM What should we do here? */
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/* Another CLIPBOARD_MANAGER has set itself as owner.
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* a) we can call [self set_clipboard_manager] here and risk a war.
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* b) we can print a message and exit.
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*/
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fprintf (stderr, "error: another clipboard manager was started!\n");
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exit (EXIT_FAILURE);
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}
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}
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/*
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* We greedily acquire the clipboard after it changes, and on startup.
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*/
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- (void) claim_clipboard
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{
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Window owner;
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owner = XGetSelectionOwner (x_dpy, atoms->clipboard);
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if (None == owner)
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{
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/*
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* The owner probably died or we are just starting up pbproxy.
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* Set pbproxy's _selection_window as the owner, and continue.
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*/
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DB ("No clipboard owner.\n");
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do
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{
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XSetSelectionOwner (x_dpy, atoms->clipboard, _selection_window,
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CurrentTime);
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} while (_selection_window != XGetSelectionOwner (x_dpy,
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atoms->clipboard));
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return;
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}
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DB ("requesting targets\n");
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request_atom = atoms->targets;
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XConvertSelection (x_dpy, atoms->clipboard, atoms->targets,
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atoms->clipboard, _selection_window, CurrentTime);
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/* Now we will get a SelectionNotify event in the future. */
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}
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/* The preference should be for UTF8_STRING before the XA_STRING*/
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static Atom
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convert_1 (XSelectionRequestEvent *e, NSString *data, Atom target, Atom prop)
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{
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Atom ret = None;
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if (data == nil)
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return ret;
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if (target == atoms->text)
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target = atoms->utf8_string;
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if (target == XA_STRING
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|| target == atoms->cstring
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|| target == atoms->utf8_string)
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{
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const char *bytes;
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if (target == XA_STRING)
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bytes = [data cStringUsingEncoding:NSISOLatin1StringEncoding];
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else
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bytes = [data UTF8String];
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if (bytes != NULL)
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{
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XChangeProperty (x_dpy, e->requestor, prop, target,
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8, PropModeReplace, (unsigned char *) bytes,
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strlen (bytes));
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ret = prop;
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}
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}
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/* FIXME: handle COMPOUND_TEXT target */
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/*gstaplin: should we [data release]? */
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[data release];
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return ret;
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}
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- (void) request_event:(XSelectionRequestEvent *)e
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{
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/* Someone's asking us for the data on the pasteboard */
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XEvent reply;
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NSString *data;
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Atom target;
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TRACE ();
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reply.xselection.type = SelectionNotify;
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reply.xselection.selection = e->selection;
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reply.xselection.target = e->target;
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reply.xselection.requestor = e->requestor;
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reply.xselection.time = e->time;
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reply.xselection.property = None;
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target = e->target;
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if (target == atoms->targets)
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{
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/* This is where we respond to the TARGETS request. */
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long data[2];
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data[0] = atoms->utf8_string;
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data[1] = XA_STRING;
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/*TODO add handling for when the data can be represented as an image. */
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XChangeProperty (x_dpy, e->requestor, e->property, target,
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8, PropModeReplace, (unsigned char *) &data,
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sizeof (data));
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reply.xselection.property = e->property;
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}
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else if (target == atoms->multiple)
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{
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if (e->property != None)
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{
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int i, nitems;
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unsigned long *atoms;
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atoms = read_prop_32 (e->requestor, e->property, &nitems);
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if (atoms != NULL)
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{
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data = [_pasteboard stringForType:NSStringPboardType];
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for (i = 0; i < nitems; i += 2)
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{
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Atom target = atoms[i], prop = atoms[i+1];
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atoms[i+1] = convert_1 (e, data, target, prop);
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}
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XChangeProperty (x_dpy, e->requestor, e->property, target,
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32, PropModeReplace, (unsigned char *) atoms,
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nitems);
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XFree (atoms);
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}
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}
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}
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data = [_pasteboard stringForType:NSStringPboardType];
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if (data != nil)
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{
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reply.xselection.property = convert_1 (e, data, target, e->property);
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}
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XSendEvent (x_dpy, e->requestor, False, 0, &reply);
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}
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/* This handles the events resulting from an XConvertSelection request. */
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- (void) notify_event:(XSelectionEvent *)e
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{
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Atom type;
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struct propdata pdata;
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[self release_pending];
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DB ("notify_event\n");
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if (None == e->property) {
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DB ("e->property is None.\n");
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/* Nothing is selected. */
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return;
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}
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if (is_incr_type (e))
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{
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/*
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* This is an INCR-style transfer, which means that we
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* will get the data after a series of PropertyNotify events.
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*/
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DB ("is INCR\n");
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if (get_property (e->requestor, e->property, &pdata, /*Delete*/ True, &type))
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{
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return;
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}
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free_propdata (&pdata);
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pending.requestor = e->requestor;
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pending.selection = e->selection;
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}
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else
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{
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if (get_property (e->requestor, e->property, &pdata, /*Delete*/ True, &type))
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{
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return;
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}
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/* We have the complete selection data.*/
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[self handle_selection: e->selection type:type propdata:&pdata];
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}
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}
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/* This is used for INCR transfers. See the ICCCM for the details. */
|
||
- (void) property_event:(XPropertyEvent *)e
|
||
{
|
||
struct propdata pdata;
|
||
Atom type;
|
||
|
||
if (None != pending.requestor && PropertyNewValue == e->state)
|
||
{
|
||
if (get_property (e->window, e->atom, &pdata, /*Delete*/ True, &type))
|
||
{
|
||
return;
|
||
}
|
||
|
||
if (0 == pdata.length)
|
||
{
|
||
/* We completed the transfer. */
|
||
[self handle_selection: pending.selection type: type propdata: &pending.propdata];
|
||
pending.propdata = null_propdata;
|
||
pending.requestor = None;
|
||
pending.selection = None;
|
||
}
|
||
else
|
||
{
|
||
[self append_to_pending: &pdata requestor: e->window];
|
||
}
|
||
}
|
||
}
|
||
|
||
- (void) handle_targets: (Atom)selection propdata:(struct propdata *)pdata
|
||
{
|
||
/* Find a type we can handle and prefer from the list of ATOMs. */
|
||
Atom preferred = find_preferred (pdata);
|
||
|
||
if (None == preferred)
|
||
{
|
||
/*
|
||
* This isn't required by the ICCCM, but some apps apparently
|
||
* don't respond to TARGETS properly.
|
||
*/
|
||
preferred = XA_STRING;
|
||
}
|
||
|
||
DB ("requesting %s\n", XGetAtomName (x_dpy, preferred));
|
||
request_atom = preferred;
|
||
XConvertSelection (x_dpy, selection, preferred, selection,
|
||
_selection_window, CurrentTime);
|
||
}
|
||
|
||
/* This handles the image type of selection (typically in CLIPBOARD). */
|
||
- (void) handle_image: (struct propdata *)pdata extension:(NSString *)fileext
|
||
{
|
||
NSString *pbtype;
|
||
NSArray *pbtypes;
|
||
NSUInteger length;
|
||
NSData *data;
|
||
|
||
pbtype = NSCreateFileContentsPboardType (fileext);
|
||
if (nil == pbtype)
|
||
{
|
||
fprintf (stderr, "unknown extension or unable to create PboardType\n");
|
||
return;
|
||
}
|
||
|
||
DB ("%s\n", [pbtype cStringUsingEncoding:NSISOLatin1StringEncoding]);
|
||
|
||
pbtypes = [NSArray arrayWithObject: pbtype];
|
||
if (nil == pbtypes)
|
||
{
|
||
DB ("error creating NSArray\n");
|
||
[pbtype release];
|
||
return;
|
||
}
|
||
|
||
length = pdata->length;
|
||
data = [[NSData alloc] initWithBytes:pdata->data length:length];
|
||
if (nil == data)
|
||
{
|
||
[pbtype release];
|
||
[pbtypes release];
|
||
return;
|
||
}
|
||
|
||
[_pasteboard declareTypes:pbtypes owner:self];
|
||
if (YES != [_pasteboard setData:data forType:pbtype])
|
||
{
|
||
DB ("writing pasteboard data failed!\n");
|
||
}
|
||
|
||
[pbtype release];
|
||
[pbtypes release];
|
||
[data release];
|
||
|
||
DB ("handled image\n");
|
||
}
|
||
|
||
/* This handles the UTF8_STRING type of selection. */
|
||
- (void) handle_utf8_string: (struct propdata *)pdata
|
||
{
|
||
NSString *string = [[NSString alloc] initWithBytes:pdata->data length:pdata->length encoding:NSUTF8StringEncoding];
|
||
if (nil == string)
|
||
return;
|
||
|
||
[_pasteboard setString:string forType:NSStringPboardType];
|
||
[string release];
|
||
}
|
||
|
||
/* This handles the XA_STRING type, which should be in Latin-1. */
|
||
- (void) handle_string: (struct propdata *)pdata
|
||
{
|
||
NSString *string = [[NSString alloc] initWithBytes:pdata->data length:pdata->length encoding:NSISOLatin1StringEncoding];
|
||
if (nil == string)
|
||
return;
|
||
|
||
[_pasteboard setString:string forType:NSStringPboardType];
|
||
[string release];
|
||
}
|
||
|
||
/* This is called when the selection is completely retrieved from another client. */
|
||
/* Warning: this frees the propdata in most cases. */
|
||
- (void) handle_selection:(Atom)selection type:(Atom)type propdata:(struct propdata *)pdata
|
||
{
|
||
if (request_atom == atoms->targets && type == atoms->atom)
|
||
{
|
||
[self handle_targets:selection propdata:pdata];
|
||
}
|
||
else if (type == atoms->image_png)
|
||
{
|
||
[self handle_image:pdata extension:@".png"];
|
||
}
|
||
else if (type == atoms->image_jpeg)
|
||
{
|
||
[self handle_image:pdata extension:@".jpeg"];
|
||
}
|
||
else if (type == atoms->utf8_string)
|
||
{
|
||
[self handle_utf8_string:pdata];
|
||
}
|
||
else if (type == atoms->string)
|
||
{
|
||
[self handle_string:pdata];
|
||
}
|
||
else
|
||
{
|
||
free_propdata(pdata);
|
||
}
|
||
|
||
if (selection == atoms->clipboard && pdata->data)
|
||
{
|
||
free_propdata(&request_data.propdata);
|
||
request_data.propdata = *pdata;
|
||
request_data.type = type;
|
||
|
||
/* We greedily take the CLIPBOARD selection whenever it changes. */
|
||
XSetSelectionOwner (x_dpy, atoms->clipboard, _selection_window,
|
||
CurrentTime);
|
||
}
|
||
else
|
||
{
|
||
free_propdata(pdata);
|
||
}
|
||
}
|
||
|
||
|
||
/* NSPasteboard-required methods */
|
||
|
||
- (void) pasteboardChangedOwner:(NSPasteboard *)sender
|
||
{
|
||
TRACE ();
|
||
|
||
DB ("PB changed owner");
|
||
|
||
/* Right now we don't care with this. */
|
||
}
|
||
|
||
|
||
/* Allocation */
|
||
|
||
- init
|
||
{
|
||
unsigned long pixel;
|
||
|
||
self = [super init];
|
||
if (self == nil)
|
||
return nil;
|
||
|
||
_pasteboard = [[NSPasteboard generalPasteboard] retain];
|
||
|
||
_known_types = [[NSArray arrayWithObject:NSStringPboardType] retain];
|
||
|
||
pixel = BlackPixel (x_dpy, DefaultScreen (x_dpy));
|
||
_selection_window = XCreateSimpleWindow (x_dpy, DefaultRootWindow (x_dpy),
|
||
0, 0, 1, 1, 0, pixel, pixel);
|
||
|
||
/* This is used to get PropertyNotify events when doing INCR transfers. */
|
||
XSelectInput (x_dpy, _selection_window, PropertyChangeMask);
|
||
|
||
request_atom = None;
|
||
|
||
init_propdata (&pending.propdata);
|
||
pending.requestor = None;
|
||
pending.selection = None;
|
||
|
||
init_propdata (&request_data.propdata);
|
||
request_data.type = None;
|
||
|
||
return self;
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
[_pasteboard releaseGlobally];
|
||
[_pasteboard release];
|
||
_pasteboard = nil;
|
||
|
||
[_known_types release];
|
||
_known_types = nil;
|
||
|
||
if (None != _selection_window)
|
||
{
|
||
XDestroyWindow (x_dpy, _selection_window);
|
||
_selection_window = None;
|
||
}
|
||
|
||
free_propdata (&pending.propdata);
|
||
free_propdata (&request_data.propdata);
|
||
|
||
[super dealloc];
|
||
}
|
||
|
||
@end
|