mirror of
https://github.com/gnif/LookingGlass.git
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427 lines
9.5 KiB
C
427 lines
9.5 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2023 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "clipboard.h"
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#include "x11.h"
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#include "atoms.h"
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#include <string.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include "app.h"
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#include "common/debug.h"
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struct X11ClipboardState
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{
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Atom aCurSelection;
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Atom aTypes[LG_CLIPBOARD_DATA_NONE];
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LG_ClipboardData type;
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bool haveRequest;
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bool incrStart;
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unsigned int lowerBound;
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};
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static const char * atomTypes[] =
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{
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"UTF8_STRING",
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"image/png",
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"image/bmp",
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"image/tiff",
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"image/jpeg"
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};
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static struct X11ClipboardState x11cb;
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// forwards
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static void x11CBSelectionRequest(const XSelectionRequestEvent e);
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static void x11CBSelectionClear(const XSelectionClearEvent e);
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static void x11CBSelectionIncr(const XPropertyEvent e);
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static void x11CBSelectionNotify(const XSelectionEvent e);
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static void x11CBXFixesSelectionNotify(const XFixesSelectionNotifyEvent e);
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bool x11CBEventThread(const XEvent * xe)
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{
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switch(xe->type)
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{
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case SelectionRequest:
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x11CBSelectionRequest(xe->xselectionrequest);
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return true;
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case SelectionClear:
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x11CBSelectionClear(xe->xselectionclear);
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return true;
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case SelectionNotify:
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x11CBSelectionNotify(xe->xselection);
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return true;
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case PropertyNotify:
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if (xe->xproperty.state != PropertyNewValue)
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break;
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if (xe->xproperty.atom == x11atoms.SEL_DATA)
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{
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if (x11cb.lowerBound == 0)
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return true;
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x11CBSelectionIncr(xe->xproperty);
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return true;
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}
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break;
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default:
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if (xe->type == x11.eventBase + XFixesSelectionNotify)
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{
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XFixesSelectionNotifyEvent * sne = (XFixesSelectionNotifyEvent *)&xe;
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x11CBXFixesSelectionNotify(*sne);
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return true;
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}
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break;
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}
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return false;
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}
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bool x11CBInit(void)
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{
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x11cb.aCurSelection = BadValue;
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for(int i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
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{
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x11cb.aTypes[i] = XInternAtom(x11.display, atomTypes[i], False);
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if (x11cb.aTypes[i] == BadAlloc || x11cb.aTypes[i] == BadValue)
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{
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DEBUG_ERROR("failed to get atom for type: %s", atomTypes[i]);
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return false;
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}
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}
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// use xfixes to get clipboard change notifications
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if (!XFixesQueryExtension(x11.display, &x11.eventBase, &x11.errorBase))
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{
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DEBUG_ERROR("failed to initialize xfixes");
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return false;
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}
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XFixesSelectSelectionInput(x11.display, x11.window,
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x11atoms.CLIPBOARD, XFixesSetSelectionOwnerNotifyMask);
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return true;
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}
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static void x11CBReplyFn(void * opaque, LG_ClipboardData type,
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uint8_t * data, uint32_t size)
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{
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XEvent *s = (XEvent *)opaque;
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XChangeProperty(
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x11.display ,
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s->xselection.requestor,
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s->xselection.property ,
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s->xselection.target ,
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8,
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PropModeReplace,
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data,
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size);
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XSendEvent(x11.display, s->xselection.requestor, 0, 0, s);
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XFlush(x11.display);
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free(s);
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}
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static void x11CBSelectionRequest(const XSelectionRequestEvent e)
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{
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XEvent * s = malloc(sizeof(*s));
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if (!s)
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{
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DEBUG_ERROR("out of memory");
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return;
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}
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s->xselection.type = SelectionNotify;
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s->xselection.requestor = e.requestor;
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s->xselection.selection = e.selection;
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s->xselection.target = e.target;
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s->xselection.property = e.property;
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s->xselection.time = e.time;
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if (!x11cb.haveRequest)
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goto nodata;
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// target list requested
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if (e.target == x11atoms.TARGETS)
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{
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Atom targets[2];
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targets[0] = x11atoms.TARGETS;
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targets[1] = x11cb.aTypes[x11cb.type];
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XChangeProperty(
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e.display,
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e.requestor,
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e.property,
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XA_ATOM,
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32,
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PropModeReplace,
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(unsigned char*)targets,
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sizeof(targets) / sizeof(Atom));
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goto send;
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}
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// look to see if we can satisfy the data type
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for(int i = 0; i < LG_CLIPBOARD_DATA_NONE; ++i)
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if (x11cb.aTypes[i] == e.target && x11cb.type == i)
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{
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// request the data
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app_clipboardRequest(x11CBReplyFn, s);
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return;
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}
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nodata:
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// report no data
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s->xselection.property = None;
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send:
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XSendEvent(x11.display, e.requestor, 0, 0, s);
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XFlush(x11.display);
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free(s);
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}
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static void x11CBSelectionClear(const XSelectionClearEvent e)
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{
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if (e.selection != x11atoms.CLIPBOARD)
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return;
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x11cb.aCurSelection = BadValue;
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app_clipboardRelease();
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return;
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}
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static void x11CBSelectionIncr(const XPropertyEvent e)
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{
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Atom type;
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int format;
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unsigned long itemCount, after;
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unsigned char *data;
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if (XGetWindowProperty(
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e.display,
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e.window,
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e.atom,
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0, ~0L, // start and length
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True, // delete the property
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x11atoms.INCR,
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&type,
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&format,
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&itemCount,
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&after,
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&data) != Success)
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{
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DEBUG_INFO("GetProp Failed");
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app_clipboardNotifySize(LG_CLIPBOARD_DATA_NONE, 0);
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goto out;
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}
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LG_ClipboardData dataType;
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for(dataType = 0; dataType < LG_CLIPBOARD_DATA_NONE; ++dataType)
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if (x11cb.aTypes[dataType] == type)
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break;
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if (dataType == LG_CLIPBOARD_DATA_NONE)
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{
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DEBUG_WARN("clipboard data (%s) not in a supported format",
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XGetAtomName(x11.display, type));
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x11cb.lowerBound = 0;
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app_clipboardNotifySize(LG_CLIPBOARD_DATA_NONE, 0);
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goto out;
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}
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if (x11cb.incrStart)
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{
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app_clipboardNotifySize(dataType, x11cb.lowerBound);
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x11cb.incrStart = false;
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}
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XFree(data);
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data = NULL;
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if (XGetWindowProperty(
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e.display,
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e.window,
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e.atom,
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0, ~0L, // start and length
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True, // delete the property
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type,
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&type,
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&format,
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&itemCount,
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&after,
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&data) != Success)
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{
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DEBUG_ERROR("XGetWindowProperty Failed");
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app_clipboardNotifySize(LG_CLIPBOARD_DATA_NONE, 0);
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goto out;
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}
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app_clipboardData(dataType, data, itemCount);
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x11cb.lowerBound -= itemCount;
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out:
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if (data)
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XFree(data);
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}
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static void x11CBXFixesSelectionNotify(const XFixesSelectionNotifyEvent e)
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{
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// check if the selection is valid and it isn't ourself
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if (e.selection != x11atoms.CLIPBOARD ||
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e.owner == x11.window || e.owner == 0)
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{
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return;
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}
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// remember which selection we are working with
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x11cb.aCurSelection = e.selection;
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XConvertSelection(
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x11.display,
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e.selection,
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x11atoms.TARGETS,
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x11atoms.TARGETS,
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x11.window,
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CurrentTime);
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return;
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}
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static void x11CBSelectionNotify(const XSelectionEvent e)
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{
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if (e.property == None)
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return;
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Atom type;
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int format;
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unsigned long itemCount, after;
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unsigned char *data;
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if (XGetWindowProperty(
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e.display,
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e.requestor,
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e.property,
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0, ~0L, // start and length
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True , // delete the property
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AnyPropertyType,
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&type,
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&format,
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&itemCount,
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&after,
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&data) != Success)
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{
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app_clipboardNotifySize(LG_CLIPBOARD_DATA_NONE, 0);
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goto out;
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}
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if (type == x11atoms.INCR)
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{
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x11cb.incrStart = true;
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x11cb.lowerBound = *(unsigned int *)data;
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goto out;
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}
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// the target list
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if (e.property == x11atoms.TARGETS)
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{
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// the format is 32-bit and we must have data
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// this is technically incorrect however as it's
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// an array of padded 64-bit values
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if (!data || format != 32)
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goto out;
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int typeCount = 0;
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LG_ClipboardData types[itemCount];
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// see if we support any of the targets listed
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const uint64_t * targets = (const uint64_t *)data;
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for(unsigned long i = 0; i < itemCount; ++i)
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{
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for(int n = 0; n < LG_CLIPBOARD_DATA_NONE; ++n)
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if (x11cb.aTypes[n] == targets[i])
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types[typeCount++] = n;
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}
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app_clipboardNotifyTypes(types, typeCount);
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goto out;
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}
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if (e.property == x11atoms.SEL_DATA)
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{
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LG_ClipboardData dataType;
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for(dataType = 0; dataType < LG_CLIPBOARD_DATA_NONE; ++dataType)
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if (x11cb.aTypes[dataType] == type)
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break;
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if (dataType == LG_CLIPBOARD_DATA_NONE)
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{
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DEBUG_WARN("clipboard data (%s) not in a supported format",
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XGetAtomName(x11.display, type));
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goto out;
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}
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app_clipboardData(dataType, data, itemCount);
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goto out;
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}
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out:
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if (data)
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XFree(data);
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}
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void x11CBNotice(LG_ClipboardData type)
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{
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x11cb.haveRequest = true;
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x11cb.type = type;
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XSetSelectionOwner(x11.display, x11atoms.CLIPBOARD, x11.window, CurrentTime);
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XFlush(x11.display);
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}
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void x11CBRelease(void)
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{
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x11cb.haveRequest = false;
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XSetSelectionOwner(x11.display, x11atoms.CLIPBOARD, None, CurrentTime);
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XFlush(x11.display);
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}
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void x11CBRequest(LG_ClipboardData type)
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{
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if (x11cb.aCurSelection == BadValue)
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return;
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XConvertSelection(
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x11.display,
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x11cb.aCurSelection,
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x11cb.aTypes[type],
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x11atoms.SEL_DATA,
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x11.window,
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CurrentTime);
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}
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