src/Unix/clip_unix.cpp

/*
 *  clip_unix.cpp - Clipboard handling, Unix implementation
 *
 *  SheepShaver (C) Christian Bauer and Marc Hellwig
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *  NOTES:
 *
 *  We must have (fast) X11 display locking routines. Otherwise, we
 *  can corrupt the X11 event queue from the emulator thread whereas
 *  the redraw thread is expected to handle them.
 *
 *  Two functions are exported to video_x.cpp:
 *    - ClipboardSelectionClear()
 *      called when we lose the selection ownership
 *    - ClipboardSelectionRequest()
 *      called when another client wants our clipboard data
 *  The display is locked by the redraw thread during their execution.
 *
 *  On PutScrap (Mac application wrote to clipboard), we always cache
 *  the Mac clipboard to a local structure (clip_data). Then, the
 *  selection ownership is grabbed until ClipboardSelectionClear()
 *  occurs. In that case, contents in cache becomes invalid.
 *
 *  On GetScrap (Mac application reads clipboard), we always fetch
 *  data from the X11 clipboard and immediately put it back to Mac
 *  side. Local cache does not need to be updated. If the selection
 *  owner supports the TIMESTAMP target, we can avoid useless copies.
 *
 *  For safety purposes, we lock the X11 display in the emulator
 *  thread during the whole GetScrap/PutScrap execution. Of course, we
 *  temporarily release the lock when waiting for SelectioNotify.
 *
 *  TODO:
 *    - handle 'PICT' to image/png, image/ppm, PIXMAP (prefs order)
 *    - handle 'styl' to text/richtext (OOo Writer)
 *    - patch ZeroScrap so that we know when cached 'styl' is stale?
 */

#include "sysdeps.h"

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <pthread.h>
#include <vector>

#include "macos_util.h"
#include "clip.h"
#include "prefs.h"
#include "cpu_emulation.h"
#include "main.h"
#include "emul_op.h"

#define DEBUG 0
#include "debug.h"

#ifndef NO_STD_NAMESPACE
using std::vector;
#endif


// Do we want GetScrap() to check for TIMESTAMP and optimize out clipboard syncs?
#define GETSCRAP_REQUESTS_TIMESTAMP 0

// Do we want GetScrap() to first check for TARGETS available from the clipboard?
#define GETSCRAP_REQUESTS_TARGETS 0


// From main_linux.cpp
extern Display *x_display;


// Conversion tables
static const uint8 mac2iso[0x80] = {
        0xc4, 0xc5, 0xc7, 0xc9, 0xd1, 0xd6, 0xdc, 0xe1,
        0xe0, 0xe2, 0xe4, 0xe3, 0xe5, 0xe7, 0xe9, 0xe8,
        0xea, 0xeb, 0xed, 0xec, 0xee, 0xef, 0xf1, 0xf3,
        0xf2, 0xf4, 0xf6, 0xf5, 0xfa, 0xf9, 0xfb, 0xfc,
        0x2b, 0xb0, 0xa2, 0xa3, 0xa7, 0xb7, 0xb6, 0xdf,
        0xae, 0xa9, 0x20, 0xb4, 0xa8, 0x23, 0xc6, 0xd8,
        0x20, 0xb1, 0x3c, 0x3e, 0xa5, 0xb5, 0xf0, 0x53,
        0x50, 0x70, 0x2f, 0xaa, 0xba, 0x4f, 0xe6, 0xf8,
        0xbf, 0xa1, 0xac, 0x2f, 0x66, 0x7e, 0x44, 0xab,
        0xbb, 0x2e, 0x20, 0xc0, 0xc3, 0xd5, 0x4f, 0x6f,
        0x2d, 0x2d, 0x22, 0x22, 0x60, 0x27, 0xf7, 0x20,
        0xff, 0x59, 0x2f, 0xa4, 0x3c, 0x3e, 0x66, 0x66,
        0x23, 0xb7, 0x2c, 0x22, 0x25, 0xc2, 0xca, 0xc1,
        0xcb, 0xc8, 0xcd, 0xce, 0xcf, 0xcc, 0xd3, 0xd4,
        0x20, 0xd2, 0xda, 0xdb, 0xd9, 0x69, 0x5e, 0x7e,
        0xaf, 0x20, 0xb7, 0xb0, 0xb8, 0x22, 0xb8, 0x20
};

static const uint8 iso2mac[0x80] = {
        0xad, 0xb0, 0xe2, 0xc4, 0xe3, 0xc9, 0xa0, 0xe0,
        0xf6, 0xe4, 0xde, 0xdc, 0xce, 0xb2, 0xb3, 0xb6,
        0xb7, 0xd4, 0xd5, 0xd2, 0xd3, 0xa5, 0xd0, 0xd1,
        0xf7, 0xaa, 0xdf, 0xdd, 0xcf, 0xba, 0xfd, 0xd9,
        0xca, 0xc1, 0xa2, 0xa3, 0xdb, 0xb4, 0xbd, 0xa4,
        0xac, 0xa9, 0xbb, 0xc7, 0xc2, 0xf0, 0xa8, 0xf8,
        0xa1, 0xb1, 0xc3, 0xc5, 0xab, 0xb5, 0xa6, 0xe1,
        0xfc, 0xc6, 0xbc, 0xc8, 0xf9, 0xda, 0xd7, 0xc0,
        0xcb, 0xe7, 0xe5, 0xcc, 0x80, 0x81, 0xae, 0x82,
        0xe9, 0x83, 0xe6, 0xe8, 0xed, 0xea, 0xeb, 0xec,
        0xf5, 0x84, 0xf1, 0xee, 0xef, 0xcd, 0x85, 0xfb,
        0xaf, 0xf4, 0xf2, 0xf3, 0x86, 0xfa, 0xb8, 0xa7,
        0x88, 0x87, 0x89, 0x8b, 0x8a, 0x8c, 0xbe, 0x8d,
        0x8f, 0x8e, 0x90, 0x91, 0x93, 0x92, 0x94, 0x95,
        0xfe, 0x96, 0x98, 0x97, 0x99, 0x9b, 0x9a, 0xd6,
        0xbf, 0x9d, 0x9c, 0x9e, 0x9f, 0xff, 0xb9, 0xd8
};

// Flag: Don't convert clipboard text
static bool no_clip_conversion;

// Flag for PutScrap(): the data was put by GetScrap(), don't bounce it back to the Unix side
static bool we_put_this_data = false;

// X11 variables
static int screen;                                              // Screen number
static Window rootwin, clip_win;                // Root window and the clipboard window
static Atom xa_clipboard;
static Atom xa_targets;
static Atom xa_multiple;
static Atom xa_timestamp;
static Atom xa_atom_pair;

// Define a byte array (rewrite if it's a bottleneck)
struct ByteArray : public vector<uint8> {
        void resize(int size) { reserve(size); vector<uint8>::resize(size); }
        uint8 *data() { return &(*this)[0]; }
};

// Clipboard data for requestors
struct ClipboardData {
        Time time;
        Atom type;
        ByteArray data;
};
static ClipboardData clip_data;

// Prototypes
static void do_putscrap(uint32 type, void *scrap, int32 length);
static void do_getscrap(void **handle, uint32 type, int32 offset);


/*
 *  Read an X11 property (hack from QT 3.1.2)
 */

static inline int max_selection_incr(Display *dpy)
{
        int max_request_size = 4 * XMaxRequestSize(dpy);
        if (max_request_size > 4 * 65536)
                max_request_size = 4 * 65536;
        else if ((max_request_size -= 100) < 0)
                max_request_size = 100;
        return max_request_size;
}

static bool read_property(Display *dpy, Window win,
                                                  Atom property, bool deleteProperty,
                                                  ByteArray & buffer, int *size, Atom *type,
                                                  int *format, bool nullterm)
{
        int maxsize = max_selection_incr(dpy);
        unsigned long bytes_left;
        unsigned long length;
        unsigned char *data;
        Atom dummy_type;
        int dummy_format;

        if (!type)
                type = &dummy_type;
        if (!format)
                format = &dummy_format;

        // Don't read anything but get the size of the property data
        if (XGetWindowProperty(dpy, win, property, 0, 0, False,
                                                   AnyPropertyType, type, format, &length, &bytes_left, &data) != Success) {
                buffer.clear();
                return false;
        }
        XFree(data);

        int offset = 0, buffer_offset = 0, format_inc = 1, proplen = bytes_left;

        switch (*format) {
        case 16:
                format_inc = sizeof(short) / 2;
                proplen *= format_inc;
                break;
        case 32:
                format_inc = sizeof(long) / 4;
                proplen *= format_inc;
                break;
        }

        buffer.resize(proplen + (nullterm ? 1 : 0));
        while (bytes_left) {
                if (XGetWindowProperty(dpy, win, property, offset, maxsize / 4,
                                                           False, AnyPropertyType, type, format,
                                                           &length, &bytes_left, &data) != Success)
                        break;

                offset += length / (32 / *format);
                length *= format_inc * (*format / 8);

                memcpy(buffer.data() + buffer_offset, data, length);
                buffer_offset += length;
                XFree(data);
        }

        if (nullterm)
                buffer[buffer_offset] = '\0';

        if (size)
                *size = buffer_offset;

        if (deleteProperty)
                XDeleteProperty(dpy, win, property);

        XFlush(dpy);
        return true;
}


/*
 *  Timed wait for a SelectionNotify event
 */

static const uint64 SELECTION_MAX_WAIT = 500000; // 500 ms

static bool wait_for_selection_notify_event(Display *dpy, Window win, XEvent *event, int timeout)
{
        uint64 start = GetTicks_usec();

        do {
                // Wait
                XDisplayUnlock();
                Delay_usec(5000);
                XDisplayLock();

                // Check for SelectionNotify event
                if (XCheckTypedWindowEvent(dpy, win, SelectionNotify, event))
                        return true;

        } while ((GetTicks_usec() - start) < timeout);

        return false;
}


/*
 *  Initialization
 */

void ClipInit(void)
{
        no_clip_conversion = PrefsFindBool("noclipconversion");

        // Find screen and root window
        screen = XDefaultScreen(x_display);
        rootwin = XRootWindow(x_display, screen);

        // Create fake window to receive selection events
        clip_win = XCreateSimpleWindow(x_display, rootwin, 0, 0, 1, 1, 0, 0, 0);

        // Initialize X11 atoms
        xa_clipboard = XInternAtom(x_display, "CLIPBOARD", False);
        xa_targets = XInternAtom(x_display, "TARGETS", False);
        xa_multiple = XInternAtom(x_display, "MULTIPLE", False);
        xa_timestamp = XInternAtom(x_display, "TIMESTAMP", False);
        xa_atom_pair = XInternAtom(x_display, "ATOM_PAIR", False);
}


/*
 *  Deinitialization
 */

void ClipExit(void)
{
        // Close window
        if (clip_win)
                XDestroyWindow(x_display, clip_win);
}


/*
 *  Mac application wrote to clipboard
 */

void PutScrap(uint32 type, void *scrap, int32 length)
{
        D(bug("PutScrap type %08lx, data %p, length %ld\n", type, scrap, length));
        if (we_put_this_data) {
                we_put_this_data = false;
                return;
        }
        if (length <= 0)
                return;

        XDisplayLock();
        do_putscrap(type, scrap, length);
        XDisplayUnlock();
}

static void do_putscrap(uint32 type, void *scrap, int32 length)
{
        clip_data.type = None;
        switch (type) {
        case FOURCC('T','E','X','T'): {
                D(bug(" clipping TEXT\n"));
                clip_data.type = XA_STRING;
                clip_data.data.clear();
                clip_data.data.reserve(length);

                // Convert text from Mac charset to ISO-Latin1
                uint8 *p = (uint8 *)scrap;
                for (int i=0; i<length; i++) {
                        uint8 c = *p++;
                        if (c < 0x80) {
                                if (c == 13)    // CR -> LF
                                        c = 10;
                        } else if (!no_clip_conversion)
                                c = mac2iso[c & 0x7f];
                        clip_data.data.push_back(c);
                }
                break;
        }

        case FOURCC('s','t','y','l'): {
                D(bug(" clipping styl\n"));
                uint16 *p = (uint16 *)scrap;
                uint16 n = ntohs(*p++);
                D(bug(" %d styles (%d bytes)\n", n, length));
                for (int i = 0; i < n; i++) {
                        uint32 offset = ntohl(*(uint32 *)p); p += 2;
                        uint16 line_height = ntohs(*p++);
                        uint16 font_ascent = ntohs(*p++);
                        uint16 font_family = ntohs(*p++);
                        uint16 style_code = ntohs(*p++);
                        uint16 char_size = ntohs(*p++);
                        uint16 r = ntohs(*p++);
                        uint16 g = ntohs(*p++);
                        uint16 b = ntohs(*p++);
                        D(bug("  offset=%d, height=%d, font ascent=%d, id=%d, style=%x, size=%d, RGB=%x/%x/%x\n",
                                  offset, line_height, font_ascent, font_family, style_code, char_size, r, g, b));
                }
                break;
        }
        }

        // Acquire selection ownership
        if (clip_data.type != None) {
                clip_data.time = CurrentTime;
                while (XGetSelectionOwner(x_display, xa_clipboard) != clip_win)
                        XSetSelectionOwner(x_display, xa_clipboard, clip_win, clip_data.time);
        }
}


/*
 *  Mac application reads clipboard
 */

void GetScrap(void **handle, uint32 type, int32 offset)
{
        D(bug("GetScrap handle %p, type %08x, offset %d\n", handle, type, offset));

        XDisplayLock();
        do_getscrap(handle, type, offset);
        XDisplayUnlock();
}

static void do_getscrap(void **handle, uint32 type, int32 offset)
{
        ByteArray data;
        XEvent event;

        // If we own the selection, the data is already available on MacOS side
        if (XGetSelectionOwner(x_display, xa_clipboard) == clip_win)
                return;

        // Check TIMESTAMP
#if GETSCRAP_REQUESTS_TIMESTAMP
        static Time last_timestamp = 0;
        XConvertSelection(x_display, xa_clipboard, xa_timestamp, xa_clipboard, clip_win, CurrentTime);
        if (wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) &&
                event.xselection.property != None &&
                read_property(x_display,
                                          event.xselection.requestor, event.xselection.property,
                                          true, data, 0, 0, 0, false)) {
                Time timestamp = ((long *)data.data())[0];
                if (timestamp <= last_timestamp)
                        return;
        }
        last_timestamp = CurrentTime;
#endif

        // Get TARGETS available
#if GETSCRAP_REQUESTS_TARGETS
        XConvertSelection(x_display, xa_clipboard, xa_targets, xa_clipboard, clip_win, CurrentTime);
        if (!wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) ||
                event.xselection.property == None ||
                !read_property(x_display,
                                           event.xselection.requestor, event.xselection.property,
                                           true, data, 0, 0, 0, false))
                return;
#endif

        // Get appropriate format for requested data
        Atom format = None;
#if GETSCRAP_REQUESTS_TARGETS
        int n_atoms = data.size() / sizeof(long);
        long *atoms = (long *)data.data();
        for (int i = 0; i < n_atoms; i++) {
                Atom target = atoms[i];
                D(bug("  target %08x (%s)\n", target, XGetAtomName(x_display, target)));
                switch (type) {
                case FOURCC('T','E','X','T'):
                        D(bug(" clipping TEXT\n"));
                        if (target == XA_STRING)
                                format = target;
                        break;
                case FOURCC('P','I','C','T'):
                        break;
                }
        }
#else
        switch (type) {
        case FOURCC('T','E','X','T'):
                D(bug(" clipping TEXT\n"));
                format = XA_STRING;
                break;
        case FOURCC('P','I','C','T'):
                break;
        }
#endif
        if (format == None)
                return;

        // Get the native clipboard data
        XConvertSelection(x_display, xa_clipboard, format, xa_clipboard, clip_win, CurrentTime);
        if (!wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) ||
                event.xselection.property == None ||
                !read_property(x_display,
                                           event.xselection.requestor, event.xselection.property,
                                           false, data, 0, 0, 0, format == XA_STRING))
                return;

        // Allocate space for new scrap in MacOS side
        M68kRegisters r;
        r.d[0] = data.size();
        Execute68kTrap(0xa71e, &r);                     // NewPtrSysClear()
        uint32 scrap_area = r.a[0];

        if (scrap_area) {
                switch (type) {
                case FOURCC('T','E','X','T'):
                        // Convert text from ISO-Latin1 to Mac charset
                        uint8 *p = Mac2HostAddr(scrap_area);
                        for (int i = 0; i < data.size(); i++) {
                                uint8 c = data[i];
                                if (c < 0x80) {
                                        if (c == 10)    // LF -> CR
                                                c = 13;
                                } else if (!no_clip_conversion)
                                        c = iso2mac[c & 0x7f];
                                *p++ = c;
                        }
                        break;
                }

                // Add new data to clipboard
                static uint8 proc[] = {
                        0x59, 0x8f,                                     // subq.l       #4,sp
                        0xa9, 0xfc,                                     // ZeroScrap()
                        0x2f, 0x3c, 0, 0, 0, 0,         // move.l       #length,-(sp)
                        0x2f, 0x3c, 0, 0, 0, 0,         // move.l       #type,-(sp)
                        0x2f, 0x3c, 0, 0, 0, 0,         // move.l       #outbuf,-(sp)
                        0xa9, 0xfe,                                     // PutScrap()
                        0x58, 0x8f,                                     // addq.l       #4,sp
                        M68K_RTS >> 8, M68K_RTS & 0xff
                };
                r.d[0] = sizeof(proc);
                Execute68kTrap(0xa71e, &r);             // NewPtrSysClear()
                uint32 proc_area = r.a[0];

                // The procedure is run-time generated because it must lays in
                // Mac address space. This is mandatory for "33-bit" address
                // space optimization on 64-bit platforms because the static
                // proc[] array is not remapped
                Host2Mac_memcpy(proc_area, proc, sizeof(proc));
                WriteMacInt32(proc_area +  6, data.size());
                WriteMacInt32(proc_area + 12, type);
                WriteMacInt32(proc_area + 18, scrap_area);
                we_put_this_data = true;
                Execute68k(proc_area, &r);

                // We are done with scratch memory
                r.a[0] = proc_area;
                Execute68kTrap(0xa01f, &r);             // DisposePtr
                r.a[0] = scrap_area;
                Execute68kTrap(0xa01f, &r);             // DisposePtr
        }
}


/*
 *      Handle X11 selection events
 */

void ClipboardSelectionClear(XSelectionClearEvent *xev)
{
        if (xev->selection != xa_clipboard)
                return;

        D(bug("Selection cleared, lost clipboard ownership\n"));
        clip_data.type = None;
        clip_data.data.clear();
}

// Top level selection handler
static bool handle_selection(XSelectionRequestEvent *req, bool is_multiple);

static bool handle_selection_TIMESTAMP(XSelectionRequestEvent *req)
{
        // 32-bit integer values are always passed as a long whatever is its size
        long timestamp = clip_data.time;

        // Change requestor property
        XChangeProperty(x_display, req->requestor, req->property,
                                        XA_INTEGER, 32,
                                        PropModeReplace, (uint8 *)&timestamp, 1);

        return true;
}

static bool handle_selection_TARGETS(XSelectionRequestEvent *req)
{
        // Default supported targets
        vector<long> targets;
        targets.push_back(xa_targets);
        targets.push_back(xa_multiple);
        targets.push_back(xa_timestamp);

        // Extra targets matchin current clipboard data
        if (clip_data.type != None)
                targets.push_back(clip_data.type);

        // Change requestor property
        XChangeProperty(x_display, req->requestor, req->property,
                                        xa_targets, 32,
                                        PropModeReplace, (uint8 *)&targets[0], targets.size());

        return true;
}

static bool handle_selection_STRING(XSelectionRequestEvent *req)
{
        // Make sure we have valid data to send though ICCCM compliant
        // clients should have first requested TARGETS to identify
        // this possibility.
        if (clip_data.type != XA_STRING)
                return false;

        // Send the string, it's already encoded as ISO-8859-1
        XChangeProperty(x_display, req->requestor, req->property,
                                        XA_STRING, 8,
                                        PropModeReplace, (uint8 *)clip_data.data.data(), clip_data.data.size());

        return true;
}

static bool handle_selection_MULTIPLE(XSelectionRequestEvent *req)
{
        Atom rtype;
        int rformat;
        ByteArray data;

        if (!read_property(x_display, req->requestor, req->property,
                                          false, data, 0, &rtype, &rformat, 0))
                return false;

        // rtype should be ATOM_PAIR but some clients don't honour that
        if (rformat != 32)
                return false;

        struct AtomPair { long target; long property; };
        AtomPair *atom_pairs = (AtomPair *)data.data();
        int n_atom_pairs = data.size() / sizeof(AtomPair);

        bool handled = true;
        if (n_atom_pairs) {
                // Setup a new XSelectionRequestEvent when servicing individual requests
                XSelectionRequestEvent event;
                memcpy(&event, req, sizeof(event));

                for (int i = 0; i < n_atom_pairs; i++) {
                        Atom target = atom_pairs[i].target;
                        Atom property = atom_pairs[i].property;

                        // None is not a valid property
                        if (property == None)
                                continue;

                        // Service this request
                        event.target = target;
                        event.property = property;
                        if (!handle_selection(&event, true)) {
                                /* FIXME: ICCCM 2.6.2:

                                   If the owner fails to convert the target named by an
                                   atom in the MULTIPLE property, it should replace that
                                   atom in the property with None.
                                */
                                handled = false;
                        }
                }
        }

        return handled;
}

static bool handle_selection(XSelectionRequestEvent *req, bool is_multiple)
{
        bool handled =false;

        if (req->target == xa_timestamp)
                handled = handle_selection_TIMESTAMP(req);
        else if (req->target == xa_targets)
                handled = handle_selection_TARGETS(req);
        else if (req->target == XA_STRING)
                handled = handle_selection_STRING(req);
        else if (req->target == xa_multiple)
                handled = handle_selection_MULTIPLE(req);

        // Notify requestor only when we are done with his request
        if (handled && !is_multiple) {
                XEvent out_event;
                out_event.xselection.type      = SelectionNotify;
                out_event.xselection.requestor = req->requestor;
                out_event.xselection.selection = req->selection;
                out_event.xselection.target    = req->target;
                out_event.xselection.property  = handled ? req->property : None;
                out_event.xselection.time      = req->time;
                XSendEvent(x_display, req->requestor, False, 0, &out_event);
        }

        return handled;
}

void ClipboardSelectionRequest(XSelectionRequestEvent *req)
{
        if (req->requestor == clip_win || req->selection != xa_clipboard)
                return;

        D(bug("Selection requested from 0x%lx to 0x%lx (%s) 0x%lx (%s)\n",
                  req->requestor,
                  req->selection,
                  XGetAtomName(req->display, req->selection),
                  req->target,
                  XGetAtomName(req->display, req->target)));

        handle_selection(req, false);
}
Revision:	1.15
Committed:	2010-02-21T09:55:52Z (14 years, 9 months ago) by cebix
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.14:	+2 -2 lines
Log Message:	fixed compiler warnings
#	Content
1	/*
2	* clip_unix.cpp - Clipboard handling, Unix implementation
3	*
4	* SheepShaver (C) Christian Bauer and Marc Hellwig
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	/*
22	* NOTES:
23	*
24	* We must have (fast) X11 display locking routines. Otherwise, we
25	* can corrupt the X11 event queue from the emulator thread whereas
26	* the redraw thread is expected to handle them.
27	*
28	* Two functions are exported to video_x.cpp:
29	* - ClipboardSelectionClear()
30	* called when we lose the selection ownership
31	* - ClipboardSelectionRequest()
32	* called when another client wants our clipboard data
33	* The display is locked by the redraw thread during their execution.
34	*
35	* On PutScrap (Mac application wrote to clipboard), we always cache
36	* the Mac clipboard to a local structure (clip_data). Then, the
37	* selection ownership is grabbed until ClipboardSelectionClear()
38	* occurs. In that case, contents in cache becomes invalid.
39	*
40	* On GetScrap (Mac application reads clipboard), we always fetch
41	* data from the X11 clipboard and immediately put it back to Mac
42	* side. Local cache does not need to be updated. If the selection
43	* owner supports the TIMESTAMP target, we can avoid useless copies.
44	*
45	* For safety purposes, we lock the X11 display in the emulator
46	* thread during the whole GetScrap/PutScrap execution. Of course, we
47	* temporarily release the lock when waiting for SelectioNotify.
48	*
49	* TODO:
50	* - handle 'PICT' to image/png, image/ppm, PIXMAP (prefs order)
51	* - handle 'styl' to text/richtext (OOo Writer)
52	* - patch ZeroScrap so that we know when cached 'styl' is stale?
53	*/
54
55	#include "sysdeps.h"
56
57	#include <X11/Xlib.h>
58	#include <X11/Xatom.h>
59	#include <pthread.h>
60	#include <vector>
61
62	#include "macos_util.h"
63	#include "clip.h"
64	#include "prefs.h"
65	#include "cpu_emulation.h"
66	#include "main.h"
67	#include "emul_op.h"
68
69	#define DEBUG 0
70	#include "debug.h"
71
72	#ifndef NO_STD_NAMESPACE
73	using std::vector;
74	#endif
75
76
77	// Do we want GetScrap() to check for TIMESTAMP and optimize out clipboard syncs?
78	#define GETSCRAP_REQUESTS_TIMESTAMP 0
79
80	// Do we want GetScrap() to first check for TARGETS available from the clipboard?
81	#define GETSCRAP_REQUESTS_TARGETS 0
82
83
84	// From main_linux.cpp
85	extern Display *x_display;
86
87
88	// Conversion tables
89	static const uint8 mac2iso[0x80] = {
90	0xc4, 0xc5, 0xc7, 0xc9, 0xd1, 0xd6, 0xdc, 0xe1,
91	0xe0, 0xe2, 0xe4, 0xe3, 0xe5, 0xe7, 0xe9, 0xe8,
92	0xea, 0xeb, 0xed, 0xec, 0xee, 0xef, 0xf1, 0xf3,
93	0xf2, 0xf4, 0xf6, 0xf5, 0xfa, 0xf9, 0xfb, 0xfc,
94	0x2b, 0xb0, 0xa2, 0xa3, 0xa7, 0xb7, 0xb6, 0xdf,
95	0xae, 0xa9, 0x20, 0xb4, 0xa8, 0x23, 0xc6, 0xd8,
96	0x20, 0xb1, 0x3c, 0x3e, 0xa5, 0xb5, 0xf0, 0x53,
97	0x50, 0x70, 0x2f, 0xaa, 0xba, 0x4f, 0xe6, 0xf8,
98	0xbf, 0xa1, 0xac, 0x2f, 0x66, 0x7e, 0x44, 0xab,
99	0xbb, 0x2e, 0x20, 0xc0, 0xc3, 0xd5, 0x4f, 0x6f,
100	0x2d, 0x2d, 0x22, 0x22, 0x60, 0x27, 0xf7, 0x20,
101	0xff, 0x59, 0x2f, 0xa4, 0x3c, 0x3e, 0x66, 0x66,
102	0x23, 0xb7, 0x2c, 0x22, 0x25, 0xc2, 0xca, 0xc1,
103	0xcb, 0xc8, 0xcd, 0xce, 0xcf, 0xcc, 0xd3, 0xd4,
104	0x20, 0xd2, 0xda, 0xdb, 0xd9, 0x69, 0x5e, 0x7e,
105	0xaf, 0x20, 0xb7, 0xb0, 0xb8, 0x22, 0xb8, 0x20
106	};
107
108	static const uint8 iso2mac[0x80] = {
109	0xad, 0xb0, 0xe2, 0xc4, 0xe3, 0xc9, 0xa0, 0xe0,
110	0xf6, 0xe4, 0xde, 0xdc, 0xce, 0xb2, 0xb3, 0xb6,
111	0xb7, 0xd4, 0xd5, 0xd2, 0xd3, 0xa5, 0xd0, 0xd1,
112	0xf7, 0xaa, 0xdf, 0xdd, 0xcf, 0xba, 0xfd, 0xd9,
113	0xca, 0xc1, 0xa2, 0xa3, 0xdb, 0xb4, 0xbd, 0xa4,
114	0xac, 0xa9, 0xbb, 0xc7, 0xc2, 0xf0, 0xa8, 0xf8,
115	0xa1, 0xb1, 0xc3, 0xc5, 0xab, 0xb5, 0xa6, 0xe1,
116	0xfc, 0xc6, 0xbc, 0xc8, 0xf9, 0xda, 0xd7, 0xc0,
117	0xcb, 0xe7, 0xe5, 0xcc, 0x80, 0x81, 0xae, 0x82,
118	0xe9, 0x83, 0xe6, 0xe8, 0xed, 0xea, 0xeb, 0xec,
119	0xf5, 0x84, 0xf1, 0xee, 0xef, 0xcd, 0x85, 0xfb,
120	0xaf, 0xf4, 0xf2, 0xf3, 0x86, 0xfa, 0xb8, 0xa7,
121	0x88, 0x87, 0x89, 0x8b, 0x8a, 0x8c, 0xbe, 0x8d,
122	0x8f, 0x8e, 0x90, 0x91, 0x93, 0x92, 0x94, 0x95,
123	0xfe, 0x96, 0x98, 0x97, 0x99, 0x9b, 0x9a, 0xd6,
124	0xbf, 0x9d, 0x9c, 0x9e, 0x9f, 0xff, 0xb9, 0xd8
125	};
126
127	// Flag: Don't convert clipboard text
128	static bool no_clip_conversion;
129
130	// Flag for PutScrap(): the data was put by GetScrap(), don't bounce it back to the Unix side
131	static bool we_put_this_data = false;
132
133	// X11 variables
134	static int screen; // Screen number
135	static Window rootwin, clip_win; // Root window and the clipboard window
136	static Atom xa_clipboard;
137	static Atom xa_targets;
138	static Atom xa_multiple;
139	static Atom xa_timestamp;
140	static Atom xa_atom_pair;
141
142	// Define a byte array (rewrite if it's a bottleneck)
143	struct ByteArray : public vector<uint8> {
144	void resize(int size) { reserve(size); vector<uint8>::resize(size); }
145	uint8 data() { return &(this)[0]; }
146	};
147
148	// Clipboard data for requestors
149	struct ClipboardData {
150	Time time;
151	Atom type;
152	ByteArray data;
153	};
154	static ClipboardData clip_data;
155
156	// Prototypes
157	static void do_putscrap(uint32 type, void *scrap, int32 length);
158	static void do_getscrap(void **handle, uint32 type, int32 offset);
159
160
161	/*
162	* Read an X11 property (hack from QT 3.1.2)
163	*/
164
165	static inline int max_selection_incr(Display *dpy)
166	{
167	int max_request_size = 4 * XMaxRequestSize(dpy);
168	if (max_request_size > 4 * 65536)
169	max_request_size = 4 * 65536;
170	else if ((max_request_size -= 100) < 0)
171	max_request_size = 100;
172	return max_request_size;
173	}
174
175	static bool read_property(Display *dpy, Window win,
176	Atom property, bool deleteProperty,
177	ByteArray & buffer, int size, Atom type,
178	int *format, bool nullterm)
179	{
180	int maxsize = max_selection_incr(dpy);
181	unsigned long bytes_left;
182	unsigned long length;
183	unsigned char *data;
184	Atom dummy_type;
185	int dummy_format;
186
187	if (!type)
188	type = &dummy_type;
189	if (!format)
190	format = &dummy_format;
191
192	// Don't read anything but get the size of the property data
193	if (XGetWindowProperty(dpy, win, property, 0, 0, False,
194	AnyPropertyType, type, format, &length, &bytes_left, &data) != Success) {
195	buffer.clear();
196	return false;
197	}
198	XFree(data);
199
200	int offset = 0, buffer_offset = 0, format_inc = 1, proplen = bytes_left;
201
202	switch (*format) {
203	case 16:
204	format_inc = sizeof(short) / 2;
205	proplen *= format_inc;
206	break;
207	case 32:
208	format_inc = sizeof(long) / 4;
209	proplen *= format_inc;
210	break;
211	}
212
213	buffer.resize(proplen + (nullterm ? 1 : 0));
214	while (bytes_left) {
215	if (XGetWindowProperty(dpy, win, property, offset, maxsize / 4,
216	False, AnyPropertyType, type, format,
217	&length, &bytes_left, &data) != Success)
218	break;
219
220	offset += length / (32 / *format);
221	length = format_inc (*format / 8);
222
223	memcpy(buffer.data() + buffer_offset, data, length);
224	buffer_offset += length;
225	XFree(data);
226	}
227
228	if (nullterm)
229	buffer[buffer_offset] = '\0';
230
231	if (size)
232	*size = buffer_offset;
233
234	if (deleteProperty)
235	XDeleteProperty(dpy, win, property);
236
237	XFlush(dpy);
238	return true;
239	}
240
241
242	/*
243	* Timed wait for a SelectionNotify event
244	*/
245
246	static const uint64 SELECTION_MAX_WAIT = 500000; // 500 ms
247
248	static bool wait_for_selection_notify_event(Display dpy, Window win, XEvent event, int timeout)
249	{
250	uint64 start = GetTicks_usec();
251
252	do {
253	// Wait
254	XDisplayUnlock();
255	Delay_usec(5000);
256	XDisplayLock();
257
258	// Check for SelectionNotify event
259	if (XCheckTypedWindowEvent(dpy, win, SelectionNotify, event))
260	return true;
261
262	} while ((GetTicks_usec() - start) < timeout);
263
264	return false;
265	}
266
267
268	/*
269	* Initialization
270	*/
271
272	void ClipInit(void)
273	{
274	no_clip_conversion = PrefsFindBool("noclipconversion");
275
276	// Find screen and root window
277	screen = XDefaultScreen(x_display);
278	rootwin = XRootWindow(x_display, screen);
279
280	// Create fake window to receive selection events
281	clip_win = XCreateSimpleWindow(x_display, rootwin, 0, 0, 1, 1, 0, 0, 0);
282
283	// Initialize X11 atoms
284	xa_clipboard = XInternAtom(x_display, "CLIPBOARD", False);
285	xa_targets = XInternAtom(x_display, "TARGETS", False);
286	xa_multiple = XInternAtom(x_display, "MULTIPLE", False);
287	xa_timestamp = XInternAtom(x_display, "TIMESTAMP", False);
288	xa_atom_pair = XInternAtom(x_display, "ATOM_PAIR", False);
289	}
290
291
292	/*
293	* Deinitialization
294	*/
295
296	void ClipExit(void)
297	{
298	// Close window
299	if (clip_win)
300	XDestroyWindow(x_display, clip_win);
301	}
302
303
304	/*
305	* Mac application wrote to clipboard
306	*/
307
308	void PutScrap(uint32 type, void *scrap, int32 length)
309	{
310	D(bug("PutScrap type %08lx, data %p, length %ld\n", type, scrap, length));
311	if (we_put_this_data) {
312	we_put_this_data = false;
313	return;
314	}
315	if (length <= 0)
316	return;
317
318	XDisplayLock();
319	do_putscrap(type, scrap, length);
320	XDisplayUnlock();
321	}
322
323	static void do_putscrap(uint32 type, void *scrap, int32 length)
324	{
325	clip_data.type = None;
326	switch (type) {
327	case FOURCC('T','E','X','T'): {
328	D(bug(" clipping TEXT\n"));
329	clip_data.type = XA_STRING;
330	clip_data.data.clear();
331	clip_data.data.reserve(length);
332
333	// Convert text from Mac charset to ISO-Latin1
334	uint8 p = (uint8 )scrap;
335	for (int i=0; i<length; i++) {
336	uint8 c = *p++;
337	if (c < 0x80) {
338	if (c == 13) // CR -> LF
339	c = 10;
340	} else if (!no_clip_conversion)
341	c = mac2iso[c & 0x7f];
342	clip_data.data.push_back(c);
343	}
344	break;
345	}
346
347	case FOURCC('s','t','y','l'): {
348	D(bug(" clipping styl\n"));
349	uint16 p = (uint16 )scrap;
350	uint16 n = ntohs(*p++);
351	D(bug(" %d styles (%d bytes)\n", n, length));
352	for (int i = 0; i < n; i++) {
353	uint32 offset = ntohl((uint32 )p); p += 2;
354	uint16 line_height = ntohs(*p++);
355	uint16 font_ascent = ntohs(*p++);
356	uint16 font_family = ntohs(*p++);
357	uint16 style_code = ntohs(*p++);
358	uint16 char_size = ntohs(*p++);
359	uint16 r = ntohs(*p++);
360	uint16 g = ntohs(*p++);
361	uint16 b = ntohs(*p++);
362	D(bug(" offset=%d, height=%d, font ascent=%d, id=%d, style=%x, size=%d, RGB=%x/%x/%x\n",
363	offset, line_height, font_ascent, font_family, style_code, char_size, r, g, b));
364	}
365	break;
366	}
367	}
368
369	// Acquire selection ownership
370	if (clip_data.type != None) {
371	clip_data.time = CurrentTime;
372	while (XGetSelectionOwner(x_display, xa_clipboard) != clip_win)
373	XSetSelectionOwner(x_display, xa_clipboard, clip_win, clip_data.time);
374	}
375	}
376
377
378	/*
379	* Mac application reads clipboard
380	*/
381
382	void GetScrap(void **handle, uint32 type, int32 offset)
383	{
384	D(bug("GetScrap handle %p, type %08x, offset %d\n", handle, type, offset));
385
386	XDisplayLock();
387	do_getscrap(handle, type, offset);
388	XDisplayUnlock();
389	}
390
391	static void do_getscrap(void **handle, uint32 type, int32 offset)
392	{
393	ByteArray data;
394	XEvent event;
395
396	// If we own the selection, the data is already available on MacOS side
397	if (XGetSelectionOwner(x_display, xa_clipboard) == clip_win)
398	return;
399
400	// Check TIMESTAMP
401	#if GETSCRAP_REQUESTS_TIMESTAMP
402	static Time last_timestamp = 0;
403	XConvertSelection(x_display, xa_clipboard, xa_timestamp, xa_clipboard, clip_win, CurrentTime);
404	if (wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) &&
405	event.xselection.property != None &&
406	read_property(x_display,
407	event.xselection.requestor, event.xselection.property,
408	true, data, 0, 0, 0, false)) {
409	Time timestamp = ((long *)data.data())[0];
410	if (timestamp <= last_timestamp)
411	return;
412	}
413	last_timestamp = CurrentTime;
414	#endif
415
416	// Get TARGETS available
417	#if GETSCRAP_REQUESTS_TARGETS
418	XConvertSelection(x_display, xa_clipboard, xa_targets, xa_clipboard, clip_win, CurrentTime);
419	if (!wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) \|\|
420	event.xselection.property == None \|\|
421	!read_property(x_display,
422	event.xselection.requestor, event.xselection.property,
423	true, data, 0, 0, 0, false))
424	return;
425	#endif
426
427	// Get appropriate format for requested data
428	Atom format = None;
429	#if GETSCRAP_REQUESTS_TARGETS
430	int n_atoms = data.size() / sizeof(long);
431	long atoms = (long )data.data();
432	for (int i = 0; i < n_atoms; i++) {
433	Atom target = atoms[i];
434	D(bug(" target %08x (%s)\n", target, XGetAtomName(x_display, target)));
435	switch (type) {
436	case FOURCC('T','E','X','T'):
437	D(bug(" clipping TEXT\n"));
438	if (target == XA_STRING)
439	format = target;
440	break;
441	case FOURCC('P','I','C','T'):
442	break;
443	}
444	}
445	#else
446	switch (type) {
447	case FOURCC('T','E','X','T'):
448	D(bug(" clipping TEXT\n"));
449	format = XA_STRING;
450	break;
451	case FOURCC('P','I','C','T'):
452	break;
453	}
454	#endif
455	if (format == None)
456	return;
457
458	// Get the native clipboard data
459	XConvertSelection(x_display, xa_clipboard, format, xa_clipboard, clip_win, CurrentTime);
460	if (!wait_for_selection_notify_event(x_display, clip_win, &event, SELECTION_MAX_WAIT) \|\|
461	event.xselection.property == None \|\|
462	!read_property(x_display,
463	event.xselection.requestor, event.xselection.property,
464	false, data, 0, 0, 0, format == XA_STRING))
465	return;
466
467	// Allocate space for new scrap in MacOS side
468	M68kRegisters r;
469	r.d[0] = data.size();
470	Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
471	uint32 scrap_area = r.a[0];
472
473	if (scrap_area) {
474	switch (type) {
475	case FOURCC('T','E','X','T'):
476	// Convert text from ISO-Latin1 to Mac charset
477	uint8 *p = Mac2HostAddr(scrap_area);
478	for (int i = 0; i < data.size(); i++) {
479	uint8 c = data[i];
480	if (c < 0x80) {
481	if (c == 10) // LF -> CR
482	c = 13;
483	} else if (!no_clip_conversion)
484	c = iso2mac[c & 0x7f];
485	*p++ = c;
486	}
487	break;
488	}
489
490	// Add new data to clipboard
491	static uint8 proc[] = {
492	0x59, 0x8f, // subq.l #4,sp
493	0xa9, 0xfc, // ZeroScrap()
494	0x2f, 0x3c, 0, 0, 0, 0, // move.l #length,-(sp)
495	0x2f, 0x3c, 0, 0, 0, 0, // move.l #type,-(sp)
496	0x2f, 0x3c, 0, 0, 0, 0, // move.l #outbuf,-(sp)
497	0xa9, 0xfe, // PutScrap()
498	0x58, 0x8f, // addq.l #4,sp
499	M68K_RTS >> 8, M68K_RTS & 0xff
500	};
501	r.d[0] = sizeof(proc);
502	Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
503	uint32 proc_area = r.a[0];
504
505	// The procedure is run-time generated because it must lays in
506	// Mac address space. This is mandatory for "33-bit" address
507	// space optimization on 64-bit platforms because the static
508	// proc[] array is not remapped
509	Host2Mac_memcpy(proc_area, proc, sizeof(proc));
510	WriteMacInt32(proc_area + 6, data.size());
511	WriteMacInt32(proc_area + 12, type);
512	WriteMacInt32(proc_area + 18, scrap_area);
513	we_put_this_data = true;
514	Execute68k(proc_area, &r);
515
516	// We are done with scratch memory
517	r.a[0] = proc_area;
518	Execute68kTrap(0xa01f, &r); // DisposePtr
519	r.a[0] = scrap_area;
520	Execute68kTrap(0xa01f, &r); // DisposePtr
521	}
522	}
523
524
525	/*
526	* Handle X11 selection events
527	*/
528
529	void ClipboardSelectionClear(XSelectionClearEvent *xev)
530	{
531	if (xev->selection != xa_clipboard)
532	return;
533
534	D(bug("Selection cleared, lost clipboard ownership\n"));
535	clip_data.type = None;
536	clip_data.data.clear();
537	}
538
539	// Top level selection handler
540	static bool handle_selection(XSelectionRequestEvent *req, bool is_multiple);
541
542	static bool handle_selection_TIMESTAMP(XSelectionRequestEvent *req)
543	{
544	// 32-bit integer values are always passed as a long whatever is its size
545	long timestamp = clip_data.time;
546
547	// Change requestor property
548	XChangeProperty(x_display, req->requestor, req->property,
549	XA_INTEGER, 32,
550	PropModeReplace, (uint8 *)&timestamp, 1);
551
552	return true;
553	}
554
555	static bool handle_selection_TARGETS(XSelectionRequestEvent *req)
556	{
557	// Default supported targets
558	vector<long> targets;
559	targets.push_back(xa_targets);
560	targets.push_back(xa_multiple);
561	targets.push_back(xa_timestamp);
562
563	// Extra targets matchin current clipboard data
564	if (clip_data.type != None)
565	targets.push_back(clip_data.type);
566
567	// Change requestor property
568	XChangeProperty(x_display, req->requestor, req->property,
569	xa_targets, 32,
570	PropModeReplace, (uint8 *)&targets[0], targets.size());
571
572	return true;
573	}
574
575	static bool handle_selection_STRING(XSelectionRequestEvent *req)
576	{
577	// Make sure we have valid data to send though ICCCM compliant
578	// clients should have first requested TARGETS to identify
579	// this possibility.
580	if (clip_data.type != XA_STRING)
581	return false;
582
583	// Send the string, it's already encoded as ISO-8859-1
584	XChangeProperty(x_display, req->requestor, req->property,
585	XA_STRING, 8,
586	PropModeReplace, (uint8 *)clip_data.data.data(), clip_data.data.size());
587
588	return true;
589	}
590
591	static bool handle_selection_MULTIPLE(XSelectionRequestEvent *req)
592	{
593	Atom rtype;
594	int rformat;
595	ByteArray data;
596
597	if (!read_property(x_display, req->requestor, req->property,
598	false, data, 0, &rtype, &rformat, 0))
599	return false;
600
601	// rtype should be ATOM_PAIR but some clients don't honour that
602	if (rformat != 32)
603	return false;
604
605	struct AtomPair { long target; long property; };
606	AtomPair atom_pairs = (AtomPair )data.data();
607	int n_atom_pairs = data.size() / sizeof(AtomPair);
608
609	bool handled = true;
610	if (n_atom_pairs) {
611	// Setup a new XSelectionRequestEvent when servicing individual requests
612	XSelectionRequestEvent event;
613	memcpy(&event, req, sizeof(event));
614
615	for (int i = 0; i < n_atom_pairs; i++) {
616	Atom target = atom_pairs[i].target;
617	Atom property = atom_pairs[i].property;
618
619	// None is not a valid property
620	if (property == None)
621	continue;
622
623	// Service this request
624	event.target = target;
625	event.property = property;
626	if (!handle_selection(&event, true)) {
627	/* FIXME: ICCCM 2.6.2:
628
629	If the owner fails to convert the target named by an
630	atom in the MULTIPLE property, it should replace that
631	atom in the property with None.
632	*/
633	handled = false;
634	}
635	}
636	}
637
638	return handled;
639	}
640
641	static bool handle_selection(XSelectionRequestEvent *req, bool is_multiple)
642	{
643	bool handled =false;
644
645	if (req->target == xa_timestamp)
646	handled = handle_selection_TIMESTAMP(req);
647	else if (req->target == xa_targets)
648	handled = handle_selection_TARGETS(req);
649	else if (req->target == XA_STRING)
650	handled = handle_selection_STRING(req);
651	else if (req->target == xa_multiple)
652	handled = handle_selection_MULTIPLE(req);
653
654	// Notify requestor only when we are done with his request
655	if (handled && !is_multiple) {
656	XEvent out_event;
657	out_event.xselection.type = SelectionNotify;
658	out_event.xselection.requestor = req->requestor;
659	out_event.xselection.selection = req->selection;
660	out_event.xselection.target = req->target;
661	out_event.xselection.property = handled ? req->property : None;
662	out_event.xselection.time = req->time;
663	XSendEvent(x_display, req->requestor, False, 0, &out_event);
664	}
665
666	return handled;
667	}
668
669	void ClipboardSelectionRequest(XSelectionRequestEvent *req)
670	{
671	if (req->requestor == clip_win \|\| req->selection != xa_clipboard)
672	return;
673
674	D(bug("Selection requested from 0x%lx to 0x%lx (%s) 0x%lx (%s)\n",
675	req->requestor,
676	req->selection,
677	XGetAtomName(req->display, req->selection),
678	req->target,
679	XGetAtomName(req->display, req->target)));
680
681	handle_selection(req, false);
682	}